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[binutils-gdb.git] / bfd / elf64-ppc.c
blob31cb2f2a2a33d15e55701dc35abdb3caaf94652d
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
105 #define elf_backend_gc_keep ppc64_elf_gc_keep
106 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
107 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 syms = NULL;
3274 codesecsym = 0;
3275 codesecsymend = 0;
3276 secsymend = 0;
3277 opdsymend = 0;
3278 symcount = 0;
3279 if (opd != NULL)
3280 {
3281 symcount = static_count;
3282 if (!relocatable)
3283 symcount += dyn_count;
3284 if (symcount == 0)
3285 return 0;
3286
3287 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3288 if (syms == NULL)
3289 return -1;
3290
3291 if (!relocatable && static_count != 0 && dyn_count != 0)
3292 {
3293 /* Use both symbol tables. */
3294 memcpy (syms, static_syms, static_count * sizeof (*syms));
3295 memcpy (syms + static_count, dyn_syms,
3296 (dyn_count + 1) * sizeof (*syms));
3297 }
3298 else if (!relocatable && static_count == 0)
3299 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3300 else
3301 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3302
3303 synthetic_relocatable = relocatable;
3304 synthetic_opd = opd;
3305 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3306
3307 if (!relocatable && symcount > 1)
3308 {
3309 long j;
3310 /* Trim duplicate syms, since we may have merged the normal and
3311 dynamic symbols. Actually, we only care about syms that have
3312 different values, so trim any with the same value. */
3313 for (i = 1, j = 1; i < symcount; ++i)
3314 if (syms[i - 1]->value + syms[i - 1]->section->vma
3315 != syms[i]->value + syms[i]->section->vma)
3316 syms[j++] = syms[i];
3317 symcount = j;
3318 }
3319
3320 i = 0;
3321 /* Note that here and in compare_symbols we can't compare opd and
3322 sym->section directly. With separate debug info files, the
3323 symbols will be extracted from the debug file while abfd passed
3324 to this function is the real binary. */
3325 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3326 ++i;
3327 codesecsym = i;
3328
3329 for (; i < symcount; ++i)
3330 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC
3331 | SEC_THREAD_LOCAL))
3332 != (SEC_CODE | SEC_ALLOC))
3333 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3334 break;
3335 codesecsymend = i;
3336
3337 for (; i < symcount; ++i)
3338 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3339 break;
3340 secsymend = i;
3341
3342 for (; i < symcount; ++i)
3343 if (strcmp (syms[i]->section->name, ".opd") != 0)
3344 break;
3345 opdsymend = i;
3346
3347 for (; i < symcount; ++i)
3348 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3349 != (SEC_CODE | SEC_ALLOC))
3350 break;
3351 symcount = i;
3352 }
3353 count = 0;
3354
3355 if (relocatable)
3356 {
3357 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3358 arelent *r;
3359 size_t size;
3360 long relcount;
3361
3362 if (opdsymend == secsymend)
3363 goto done;
3364
3365 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3366 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3367 if (relcount == 0)
3368 goto done;
3369
3370 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3371 {
3372 count = -1;
3373 goto done;
3374 }
3375
3376 size = 0;
3377 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3378 {
3379 asymbol *sym;
3380
3381 while (r < opd->relocation + relcount
3382 && r->address < syms[i]->value + opd->vma)
3383 ++r;
3384
3385 if (r == opd->relocation + relcount)
3386 break;
3387
3388 if (r->address != syms[i]->value + opd->vma)
3389 continue;
3390
3391 if (r->howto->type != R_PPC64_ADDR64)
3392 continue;
3393
3394 sym = *r->sym_ptr_ptr;
3395 if (!sym_exists_at (syms, opdsymend, symcount,
3396 sym->section->id, sym->value + r->addend))
3397 {
3398 ++count;
3399 size += sizeof (asymbol);
3400 size += strlen (syms[i]->name) + 2;
3401 }
3402 }
3403
3404 if (size == 0)
3405 goto done;
3406 s = *ret = bfd_malloc (size);
3407 if (s == NULL)
3408 {
3409 count = -1;
3410 goto done;
3411 }
3412
3413 names = (char *) (s + count);
3414
3415 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3416 {
3417 asymbol *sym;
3418
3419 while (r < opd->relocation + relcount
3420 && r->address < syms[i]->value + opd->vma)
3421 ++r;
3422
3423 if (r == opd->relocation + relcount)
3424 break;
3425
3426 if (r->address != syms[i]->value + opd->vma)
3427 continue;
3428
3429 if (r->howto->type != R_PPC64_ADDR64)
3430 continue;
3431
3432 sym = *r->sym_ptr_ptr;
3433 if (!sym_exists_at (syms, opdsymend, symcount,
3434 sym->section->id, sym->value + r->addend))
3435 {
3436 size_t len;
3437
3438 *s = *syms[i];
3439 s->flags |= BSF_SYNTHETIC;
3440 s->section = sym->section;
3441 s->value = sym->value + r->addend;
3442 s->name = names;
3443 *names++ = '.';
3444 len = strlen (syms[i]->name);
3445 memcpy (names, syms[i]->name, len + 1);
3446 names += len + 1;
3447 /* Have udata.p point back to the original symbol this
3448 synthetic symbol was derived from. */
3449 s->udata.p = syms[i];
3450 s++;
3451 }
3452 }
3453 }
3454 else
3455 {
3456 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3457 bfd_byte *contents = NULL;
3458 size_t size;
3459 long plt_count = 0;
3460 bfd_vma glink_vma = 0, resolv_vma = 0;
3461 asection *dynamic, *glink = NULL, *relplt = NULL;
3462 arelent *p;
3463
3464 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3465 {
3466 free_contents_and_exit_err:
3467 count = -1;
3468 free_contents_and_exit:
3469 if (contents)
3470 free (contents);
3471 goto done;
3472 }
3473
3474 size = 0;
3475 for (i = secsymend; i < opdsymend; ++i)
3476 {
3477 bfd_vma ent;
3478
3479 /* Ignore bogus symbols. */
3480 if (syms[i]->value > opd->size - 8)
3481 continue;
3482
3483 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3484 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3485 {
3486 ++count;
3487 size += sizeof (asymbol);
3488 size += strlen (syms[i]->name) + 2;
3489 }
3490 }
3491
3492 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3493 if (dyn_count != 0
3494 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3495 {
3496 bfd_byte *dynbuf, *extdyn, *extdynend;
3497 size_t extdynsize;
3498 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3499
3500 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3501 goto free_contents_and_exit_err;
3502
3503 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3504 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3505
3506 extdyn = dynbuf;
3507 extdynend = extdyn + dynamic->size;
3508 for (; extdyn < extdynend; extdyn += extdynsize)
3509 {
3510 Elf_Internal_Dyn dyn;
3511 (*swap_dyn_in) (abfd, extdyn, &dyn);
3512
3513 if (dyn.d_tag == DT_NULL)
3514 break;
3515
3516 if (dyn.d_tag == DT_PPC64_GLINK)
3517 {
3518 /* The first glink stub starts at offset 32; see
3519 comment in ppc64_elf_finish_dynamic_sections. */
3520 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3521 /* The .glink section usually does not survive the final
3522 link; search for the section (usually .text) where the
3523 glink stubs now reside. */
3524 glink = bfd_sections_find_if (abfd, section_covers_vma,
3525 &glink_vma);
3526 break;
3527 }
3528 }
3529
3530 free (dynbuf);
3531 }
3532
3533 if (glink != NULL)
3534 {
3535 /* Determine __glink trampoline by reading the relative branch
3536 from the first glink stub. */
3537 bfd_byte buf[4];
3538 unsigned int off = 0;
3539
3540 while (bfd_get_section_contents (abfd, glink, buf,
3541 glink_vma + off - glink->vma, 4))
3542 {
3543 unsigned int insn = bfd_get_32 (abfd, buf);
3544 insn ^= B_DOT;
3545 if ((insn & ~0x3fffffc) == 0)
3546 {
3547 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3548 break;
3549 }
3550 off += 4;
3551 if (off > 4)
3552 break;
3553 }
3554
3555 if (resolv_vma)
3556 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3557
3558 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3559 if (relplt != NULL)
3560 {
3561 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3562 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3563 goto free_contents_and_exit_err;
3564
3565 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3566 size += plt_count * sizeof (asymbol);
3567
3568 p = relplt->relocation;
3569 for (i = 0; i < plt_count; i++, p++)
3570 {
3571 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3572 if (p->addend != 0)
3573 size += sizeof ("+0x") - 1 + 16;
3574 }
3575 }
3576 }
3577
3578 if (size == 0)
3579 goto free_contents_and_exit;
3580 s = *ret = bfd_malloc (size);
3581 if (s == NULL)
3582 goto free_contents_and_exit_err;
3583
3584 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3585
3586 for (i = secsymend; i < opdsymend; ++i)
3587 {
3588 bfd_vma ent;
3589
3590 if (syms[i]->value > opd->size - 8)
3591 continue;
3592
3593 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3594 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3595 {
3596 long lo, hi;
3597 size_t len;
3598 asection *sec = abfd->sections;
3599
3600 *s = *syms[i];
3601 lo = codesecsym;
3602 hi = codesecsymend;
3603 while (lo < hi)
3604 {
3605 long mid = (lo + hi) >> 1;
3606 if (syms[mid]->section->vma < ent)
3607 lo = mid + 1;
3608 else if (syms[mid]->section->vma > ent)
3609 hi = mid;
3610 else
3611 {
3612 sec = syms[mid]->section;
3613 break;
3614 }
3615 }
3616
3617 if (lo >= hi && lo > codesecsym)
3618 sec = syms[lo - 1]->section;
3619
3620 for (; sec != NULL; sec = sec->next)
3621 {
3622 if (sec->vma > ent)
3623 break;
3624 /* SEC_LOAD may not be set if SEC is from a separate debug
3625 info file. */
3626 if ((sec->flags & SEC_ALLOC) == 0)
3627 break;
3628 if ((sec->flags & SEC_CODE) != 0)
3629 s->section = sec;
3630 }
3631 s->flags |= BSF_SYNTHETIC;
3632 s->value = ent - s->section->vma;
3633 s->name = names;
3634 *names++ = '.';
3635 len = strlen (syms[i]->name);
3636 memcpy (names, syms[i]->name, len + 1);
3637 names += len + 1;
3638 /* Have udata.p point back to the original symbol this
3639 synthetic symbol was derived from. */
3640 s->udata.p = syms[i];
3641 s++;
3642 }
3643 }
3644 free (contents);
3645
3646 if (glink != NULL && relplt != NULL)
3647 {
3648 if (resolv_vma)
3649 {
3650 /* Add a symbol for the main glink trampoline. */
3651 memset (s, 0, sizeof *s);
3652 s->the_bfd = abfd;
3653 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3654 s->section = glink;
3655 s->value = resolv_vma - glink->vma;
3656 s->name = names;
3657 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3658 names += sizeof ("__glink_PLTresolve");
3659 s++;
3660 count++;
3661 }
3662
3663 /* FIXME: It would be very much nicer to put sym@plt on the
3664 stub rather than on the glink branch table entry. The
3665 objdump disassembler would then use a sensible symbol
3666 name on plt calls. The difficulty in doing so is
3667 a) finding the stubs, and,
3668 b) matching stubs against plt entries, and,
3669 c) there can be multiple stubs for a given plt entry.
3670
3671 Solving (a) could be done by code scanning, but older
3672 ppc64 binaries used different stubs to current code.
3673 (b) is the tricky one since you need to known the toc
3674 pointer for at least one function that uses a pic stub to
3675 be able to calculate the plt address referenced.
3676 (c) means gdb would need to set multiple breakpoints (or
3677 find the glink branch itself) when setting breakpoints
3678 for pending shared library loads. */
3679 p = relplt->relocation;
3680 for (i = 0; i < plt_count; i++, p++)
3681 {
3682 size_t len;
3683
3684 *s = **p->sym_ptr_ptr;
3685 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3686 we are defining a symbol, ensure one of them is set. */
3687 if ((s->flags & BSF_LOCAL) == 0)
3688 s->flags |= BSF_GLOBAL;
3689 s->flags |= BSF_SYNTHETIC;
3690 s->section = glink;
3691 s->value = glink_vma - glink->vma;
3692 s->name = names;
3693 s->udata.p = NULL;
3694 len = strlen ((*p->sym_ptr_ptr)->name);
3695 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3696 names += len;
3697 if (p->addend != 0)
3698 {
3699 memcpy (names, "+0x", sizeof ("+0x") - 1);
3700 names += sizeof ("+0x") - 1;
3701 bfd_sprintf_vma (abfd, names, p->addend);
3702 names += strlen (names);
3703 }
3704 memcpy (names, "@plt", sizeof ("@plt"));
3705 names += sizeof ("@plt");
3706 s++;
3707 if (abi < 2)
3708 {
3709 glink_vma += 8;
3710 if (i >= 0x8000)
3711 glink_vma += 4;
3712 }
3713 else
3714 glink_vma += 4;
3715 }
3716 count += plt_count;
3717 }
3718 }
3719
3720 done:
3721 free (syms);
3722 return count;
3723 }
3724 \f
3725 /* The following functions are specific to the ELF linker, while
3726 functions above are used generally. Those named ppc64_elf_* are
3727 called by the main ELF linker code. They appear in this file more
3728 or less in the order in which they are called. eg.
3729 ppc64_elf_check_relocs is called early in the link process,
3730 ppc64_elf_finish_dynamic_sections is one of the last functions
3731 called.
3732
3733 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3734 functions have both a function code symbol and a function descriptor
3735 symbol. A call to foo in a relocatable object file looks like:
3736
3737 . .text
3738 . x:
3739 . bl .foo
3740 . nop
3741
3742 The function definition in another object file might be:
3743
3744 . .section .opd
3745 . foo: .quad .foo
3746 . .quad .TOC.@tocbase
3747 . .quad 0
3748 .
3749 . .text
3750 . .foo: blr
3751
3752 When the linker resolves the call during a static link, the branch
3753 unsurprisingly just goes to .foo and the .opd information is unused.
3754 If the function definition is in a shared library, things are a little
3755 different: The call goes via a plt call stub, the opd information gets
3756 copied to the plt, and the linker patches the nop.
3757
3758 . x:
3759 . bl .foo_stub
3760 . ld 2,40(1)
3761 .
3762 .
3763 . .foo_stub:
3764 . std 2,40(1) # in practice, the call stub
3765 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3766 . addi 11,11,Lfoo@toc@l # this is the general idea
3767 . ld 12,0(11)
3768 . ld 2,8(11)
3769 . mtctr 12
3770 . ld 11,16(11)
3771 . bctr
3772 .
3773 . .section .plt
3774 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3775
3776 The "reloc ()" notation is supposed to indicate that the linker emits
3777 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3778 copying.
3779
3780 What are the difficulties here? Well, firstly, the relocations
3781 examined by the linker in check_relocs are against the function code
3782 sym .foo, while the dynamic relocation in the plt is emitted against
3783 the function descriptor symbol, foo. Somewhere along the line, we need
3784 to carefully copy dynamic link information from one symbol to the other.
3785 Secondly, the generic part of the elf linker will make .foo a dynamic
3786 symbol as is normal for most other backends. We need foo dynamic
3787 instead, at least for an application final link. However, when
3788 creating a shared library containing foo, we need to have both symbols
3789 dynamic so that references to .foo are satisfied during the early
3790 stages of linking. Otherwise the linker might decide to pull in a
3791 definition from some other object, eg. a static library.
3792
3793 Update: As of August 2004, we support a new convention. Function
3794 calls may use the function descriptor symbol, ie. "bl foo". This
3795 behaves exactly as "bl .foo". */
3796
3797 /* Of those relocs that might be copied as dynamic relocs, this
3798 function selects those that must be copied when linking a shared
3799 library or PIE, even when the symbol is local. */
3800
3801 static int
3802 must_be_dyn_reloc (struct bfd_link_info *info,
3803 enum elf_ppc64_reloc_type r_type)
3804 {
3805 switch (r_type)
3806 {
3807 default:
3808 /* Only relative relocs can be resolved when the object load
3809 address isn't fixed. DTPREL64 is excluded because the
3810 dynamic linker needs to differentiate global dynamic from
3811 local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */
3812 return 1;
3813
3814 case R_PPC64_REL32:
3815 case R_PPC64_REL64:
3816 case R_PPC64_REL30:
3817 return 0;
3818
3819 case R_PPC64_TPREL16:
3820 case R_PPC64_TPREL16_LO:
3821 case R_PPC64_TPREL16_HI:
3822 case R_PPC64_TPREL16_HA:
3823 case R_PPC64_TPREL16_DS:
3824 case R_PPC64_TPREL16_LO_DS:
3825 case R_PPC64_TPREL16_HIGH:
3826 case R_PPC64_TPREL16_HIGHA:
3827 case R_PPC64_TPREL16_HIGHER:
3828 case R_PPC64_TPREL16_HIGHERA:
3829 case R_PPC64_TPREL16_HIGHEST:
3830 case R_PPC64_TPREL16_HIGHESTA:
3831 case R_PPC64_TPREL64:
3832 /* These relocations are relative but in a shared library the
3833 linker doesn't know the thread pointer base. */
3834 return bfd_link_dll (info);
3835 }
3836 }
3837
3838 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3839 copying dynamic variables from a shared lib into an app's dynbss
3840 section, and instead use a dynamic relocation to point into the
3841 shared lib. With code that gcc generates, it's vital that this be
3842 enabled; In the PowerPC64 ABI, the address of a function is actually
3843 the address of a function descriptor, which resides in the .opd
3844 section. gcc uses the descriptor directly rather than going via the
3845 GOT as some other ABI's do, which means that initialized function
3846 pointers must reference the descriptor. Thus, a function pointer
3847 initialized to the address of a function in a shared library will
3848 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3849 redefines the function descriptor symbol to point to the copy. This
3850 presents a problem as a plt entry for that function is also
3851 initialized from the function descriptor symbol and the copy reloc
3852 may not be initialized first. */
3853 #define ELIMINATE_COPY_RELOCS 1
3854
3855 /* Section name for stubs is the associated section name plus this
3856 string. */
3857 #define STUB_SUFFIX ".stub"
3858
3859 /* Linker stubs.
3860 ppc_stub_long_branch:
3861 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3862 destination, but a 24 bit branch in a stub section will reach.
3863 . b dest
3864
3865 ppc_stub_plt_branch:
3866 Similar to the above, but a 24 bit branch in the stub section won't
3867 reach its destination.
3868 . addis %r11,%r2,xxx@toc@ha
3869 . ld %r12,xxx@toc@l(%r11)
3870 . mtctr %r12
3871 . bctr
3872
3873 ppc_stub_plt_call:
3874 Used to call a function in a shared library. If it so happens that
3875 the plt entry referenced crosses a 64k boundary, then an extra
3876 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3877 . std %r2,40(%r1)
3878 . addis %r11,%r2,xxx@toc@ha
3879 . ld %r12,xxx+0@toc@l(%r11)
3880 . mtctr %r12
3881 . ld %r2,xxx+8@toc@l(%r11)
3882 . ld %r11,xxx+16@toc@l(%r11)
3883 . bctr
3884
3885 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3886 code to adjust the value and save r2 to support multiple toc sections.
3887 A ppc_stub_long_branch with an r2 offset looks like:
3888 . std %r2,40(%r1)
3889 . addis %r2,%r2,off@ha
3890 . addi %r2,%r2,off@l
3891 . b dest
3892
3893 A ppc_stub_plt_branch with an r2 offset looks like:
3894 . std %r2,40(%r1)
3895 . addis %r11,%r2,xxx@toc@ha
3896 . ld %r12,xxx@toc@l(%r11)
3897 . addis %r2,%r2,off@ha
3898 . addi %r2,%r2,off@l
3899 . mtctr %r12
3900 . bctr
3901
3902 In cases where the "addis" instruction would add zero, the "addis" is
3903 omitted and following instructions modified slightly in some cases.
3904 */
3905
3906 enum ppc_stub_type {
3907 ppc_stub_none,
3908 ppc_stub_long_branch,
3909 ppc_stub_long_branch_r2off,
3910 ppc_stub_plt_branch,
3911 ppc_stub_plt_branch_r2off,
3912 ppc_stub_plt_call,
3913 ppc_stub_plt_call_r2save,
3914 ppc_stub_global_entry,
3915 ppc_stub_save_res
3916 };
3917
3918 /* Information on stub grouping. */
3919 struct map_stub
3920 {
3921 /* The stub section. */
3922 asection *stub_sec;
3923 /* This is the section to which stubs in the group will be attached. */
3924 asection *link_sec;
3925 /* Next group. */
3926 struct map_stub *next;
3927 /* Whether to emit a copy of register save/restore functions in this
3928 group. */
3929 int needs_save_res;
3930 /* The offset of the __tls_get_addr_opt plt stub bctrl in this group,
3931 or -1u if no such stub with bctrl exists. */
3932 unsigned int tls_get_addr_opt_bctrl;
3933 };
3934
3935 struct ppc_stub_hash_entry {
3936
3937 /* Base hash table entry structure. */
3938 struct bfd_hash_entry root;
3939
3940 enum ppc_stub_type stub_type;
3941
3942 /* Group information. */
3943 struct map_stub *group;
3944
3945 /* Offset within stub_sec of the beginning of this stub. */
3946 bfd_vma stub_offset;
3947
3948 /* Given the symbol's value and its section we can determine its final
3949 value when building the stubs (so the stub knows where to jump. */
3950 bfd_vma target_value;
3951 asection *target_section;
3952
3953 /* The symbol table entry, if any, that this was derived from. */
3954 struct ppc_link_hash_entry *h;
3955 struct plt_entry *plt_ent;
3956
3957 /* Symbol st_other. */
3958 unsigned char other;
3959 };
3960
3961 struct ppc_branch_hash_entry {
3962
3963 /* Base hash table entry structure. */
3964 struct bfd_hash_entry root;
3965
3966 /* Offset within branch lookup table. */
3967 unsigned int offset;
3968
3969 /* Generation marker. */
3970 unsigned int iter;
3971 };
3972
3973 /* Used to track dynamic relocations for local symbols. */
3974 struct ppc_dyn_relocs
3975 {
3976 struct ppc_dyn_relocs *next;
3977
3978 /* The input section of the reloc. */
3979 asection *sec;
3980
3981 /* Total number of relocs copied for the input section. */
3982 unsigned int count : 31;
3983
3984 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3985 unsigned int ifunc : 1;
3986 };
3987
3988 struct ppc_link_hash_entry
3989 {
3990 struct elf_link_hash_entry elf;
3991
3992 union {
3993 /* A pointer to the most recently used stub hash entry against this
3994 symbol. */
3995 struct ppc_stub_hash_entry *stub_cache;
3996
3997 /* A pointer to the next symbol starting with a '.' */
3998 struct ppc_link_hash_entry *next_dot_sym;
3999 } u;
4000
4001 /* Track dynamic relocs copied for this symbol. */
4002 struct elf_dyn_relocs *dyn_relocs;
4003
4004 /* Chain of aliases referring to a weakdef. */
4005 struct ppc_link_hash_entry *weakref;
4006
4007 /* Link between function code and descriptor symbols. */
4008 struct ppc_link_hash_entry *oh;
4009
4010 /* Flag function code and descriptor symbols. */
4011 unsigned int is_func:1;
4012 unsigned int is_func_descriptor:1;
4013 unsigned int fake:1;
4014
4015 /* Whether global opd/toc sym has been adjusted or not.
4016 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
4017 should be set for all globals defined in any opd/toc section. */
4018 unsigned int adjust_done:1;
4019
4020 /* Set if this is an out-of-line register save/restore function,
4021 with non-standard calling convention. */
4022 unsigned int save_res:1;
4023
4024 /* Set if a duplicate symbol with non-zero localentry is detected,
4025 even when the duplicate symbol does not provide a definition. */
4026 unsigned int non_zero_localentry:1;
4027
4028 /* Contexts in which symbol is used in the GOT (or TOC).
4029 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4030 corresponding relocs are encountered during check_relocs.
4031 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4032 indicate the corresponding GOT entry type is not needed.
4033 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4034 a TPREL one. We use a separate flag rather than setting TPREL
4035 just for convenience in distinguishing the two cases. */
4036 #define TLS_GD 1 /* GD reloc. */
4037 #define TLS_LD 2 /* LD reloc. */
4038 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4039 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4040 #define TLS_TLS 16 /* Any TLS reloc. */
4041 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4042 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4043 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4044 unsigned char tls_mask;
4045 };
4046
4047 /* ppc64 ELF linker hash table. */
4048
4049 struct ppc_link_hash_table
4050 {
4051 struct elf_link_hash_table elf;
4052
4053 /* The stub hash table. */
4054 struct bfd_hash_table stub_hash_table;
4055
4056 /* Another hash table for plt_branch stubs. */
4057 struct bfd_hash_table branch_hash_table;
4058
4059 /* Hash table for function prologue tocsave. */
4060 htab_t tocsave_htab;
4061
4062 /* Various options and other info passed from the linker. */
4063 struct ppc64_elf_params *params;
4064
4065 /* The size of sec_info below. */
4066 unsigned int sec_info_arr_size;
4067
4068 /* Per-section array of extra section info. Done this way rather
4069 than as part of ppc64_elf_section_data so we have the info for
4070 non-ppc64 sections. */
4071 struct
4072 {
4073 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4074 bfd_vma toc_off;
4075
4076 union
4077 {
4078 /* The section group that this section belongs to. */
4079 struct map_stub *group;
4080 /* A temp section list pointer. */
4081 asection *list;
4082 } u;
4083 } *sec_info;
4084
4085 /* Linked list of groups. */
4086 struct map_stub *group;
4087
4088 /* Temp used when calculating TOC pointers. */
4089 bfd_vma toc_curr;
4090 bfd *toc_bfd;
4091 asection *toc_first_sec;
4092
4093 /* Used when adding symbols. */
4094 struct ppc_link_hash_entry *dot_syms;
4095
4096 /* Shortcuts to get to dynamic linker sections. */
4097 asection *glink;
4098 asection *sfpr;
4099 asection *brlt;
4100 asection *relbrlt;
4101 asection *glink_eh_frame;
4102
4103 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4104 struct ppc_link_hash_entry *tls_get_addr;
4105 struct ppc_link_hash_entry *tls_get_addr_fd;
4106
4107 /* The size of reliplt used by got entry relocs. */
4108 bfd_size_type got_reli_size;
4109
4110 /* Statistics. */
4111 unsigned long stub_count[ppc_stub_global_entry];
4112
4113 /* Number of stubs against global syms. */
4114 unsigned long stub_globals;
4115
4116 /* Set if we're linking code with function descriptors. */
4117 unsigned int opd_abi:1;
4118
4119 /* Support for multiple toc sections. */
4120 unsigned int do_multi_toc:1;
4121 unsigned int multi_toc_needed:1;
4122 unsigned int second_toc_pass:1;
4123 unsigned int do_toc_opt:1;
4124
4125 /* Set if tls optimization is enabled. */
4126 unsigned int do_tls_opt:1;
4127
4128 /* Set on error. */
4129 unsigned int stub_error:1;
4130
4131 /* Whether func_desc_adjust needs to be run over symbols. */
4132 unsigned int need_func_desc_adj:1;
4133
4134 /* Whether there exist local gnu indirect function resolvers,
4135 referenced by dynamic relocations. */
4136 unsigned int local_ifunc_resolver:1;
4137 unsigned int maybe_local_ifunc_resolver:1;
4138
4139 /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */
4140 unsigned int has_plt_localentry0:1;
4141
4142 /* Incremented every time we size stubs. */
4143 unsigned int stub_iteration;
4144
4145 /* Small local sym cache. */
4146 struct sym_cache sym_cache;
4147 };
4148
4149 /* Rename some of the generic section flags to better document how they
4150 are used here. */
4151
4152 /* Nonzero if this section has TLS related relocations. */
4153 #define has_tls_reloc sec_flg0
4154
4155 /* Nonzero if this section has a call to __tls_get_addr. */
4156 #define has_tls_get_addr_call sec_flg1
4157
4158 /* Nonzero if this section has any toc or got relocs. */
4159 #define has_toc_reloc sec_flg2
4160
4161 /* Nonzero if this section has a call to another section that uses
4162 the toc or got. */
4163 #define makes_toc_func_call sec_flg3
4164
4165 /* Recursion protection when determining above flag. */
4166 #define call_check_in_progress sec_flg4
4167 #define call_check_done sec_flg5
4168
4169 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4170
4171 #define ppc_hash_table(p) \
4172 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4173 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4174
4175 #define ppc_stub_hash_lookup(table, string, create, copy) \
4176 ((struct ppc_stub_hash_entry *) \
4177 bfd_hash_lookup ((table), (string), (create), (copy)))
4178
4179 #define ppc_branch_hash_lookup(table, string, create, copy) \
4180 ((struct ppc_branch_hash_entry *) \
4181 bfd_hash_lookup ((table), (string), (create), (copy)))
4182
4183 /* Create an entry in the stub hash table. */
4184
4185 static struct bfd_hash_entry *
4186 stub_hash_newfunc (struct bfd_hash_entry *entry,
4187 struct bfd_hash_table *table,
4188 const char *string)
4189 {
4190 /* Allocate the structure if it has not already been allocated by a
4191 subclass. */
4192 if (entry == NULL)
4193 {
4194 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4195 if (entry == NULL)
4196 return entry;
4197 }
4198
4199 /* Call the allocation method of the superclass. */
4200 entry = bfd_hash_newfunc (entry, table, string);
4201 if (entry != NULL)
4202 {
4203 struct ppc_stub_hash_entry *eh;
4204
4205 /* Initialize the local fields. */
4206 eh = (struct ppc_stub_hash_entry *) entry;
4207 eh->stub_type = ppc_stub_none;
4208 eh->group = NULL;
4209 eh->stub_offset = 0;
4210 eh->target_value = 0;
4211 eh->target_section = NULL;
4212 eh->h = NULL;
4213 eh->plt_ent = NULL;
4214 eh->other = 0;
4215 }
4216
4217 return entry;
4218 }
4219
4220 /* Create an entry in the branch hash table. */
4221
4222 static struct bfd_hash_entry *
4223 branch_hash_newfunc (struct bfd_hash_entry *entry,
4224 struct bfd_hash_table *table,
4225 const char *string)
4226 {
4227 /* Allocate the structure if it has not already been allocated by a
4228 subclass. */
4229 if (entry == NULL)
4230 {
4231 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4232 if (entry == NULL)
4233 return entry;
4234 }
4235
4236 /* Call the allocation method of the superclass. */
4237 entry = bfd_hash_newfunc (entry, table, string);
4238 if (entry != NULL)
4239 {
4240 struct ppc_branch_hash_entry *eh;
4241
4242 /* Initialize the local fields. */
4243 eh = (struct ppc_branch_hash_entry *) entry;
4244 eh->offset = 0;
4245 eh->iter = 0;
4246 }
4247
4248 return entry;
4249 }
4250
4251 /* Create an entry in a ppc64 ELF linker hash table. */
4252
4253 static struct bfd_hash_entry *
4254 link_hash_newfunc (struct bfd_hash_entry *entry,
4255 struct bfd_hash_table *table,
4256 const char *string)
4257 {
4258 /* Allocate the structure if it has not already been allocated by a
4259 subclass. */
4260 if (entry == NULL)
4261 {
4262 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4263 if (entry == NULL)
4264 return entry;
4265 }
4266
4267 /* Call the allocation method of the superclass. */
4268 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4269 if (entry != NULL)
4270 {
4271 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4272
4273 memset (&eh->u.stub_cache, 0,
4274 (sizeof (struct ppc_link_hash_entry)
4275 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4276
4277 /* When making function calls, old ABI code references function entry
4278 points (dot symbols), while new ABI code references the function
4279 descriptor symbol. We need to make any combination of reference and
4280 definition work together, without breaking archive linking.
4281
4282 For a defined function "foo" and an undefined call to "bar":
4283 An old object defines "foo" and ".foo", references ".bar" (possibly
4284 "bar" too).
4285 A new object defines "foo" and references "bar".
4286
4287 A new object thus has no problem with its undefined symbols being
4288 satisfied by definitions in an old object. On the other hand, the
4289 old object won't have ".bar" satisfied by a new object.
4290
4291 Keep a list of newly added dot-symbols. */
4292
4293 if (string[0] == '.')
4294 {
4295 struct ppc_link_hash_table *htab;
4296
4297 htab = (struct ppc_link_hash_table *) table;
4298 eh->u.next_dot_sym = htab->dot_syms;
4299 htab->dot_syms = eh;
4300 }
4301 }
4302
4303 return entry;
4304 }
4305
4306 struct tocsave_entry {
4307 asection *sec;
4308 bfd_vma offset;
4309 };
4310
4311 static hashval_t
4312 tocsave_htab_hash (const void *p)
4313 {
4314 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4315 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4316 }
4317
4318 static int
4319 tocsave_htab_eq (const void *p1, const void *p2)
4320 {
4321 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4322 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4323 return e1->sec == e2->sec && e1->offset == e2->offset;
4324 }
4325
4326 /* Destroy a ppc64 ELF linker hash table. */
4327
4328 static void
4329 ppc64_elf_link_hash_table_free (bfd *obfd)
4330 {
4331 struct ppc_link_hash_table *htab;
4332
4333 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4334 if (htab->tocsave_htab)
4335 htab_delete (htab->tocsave_htab);
4336 bfd_hash_table_free (&htab->branch_hash_table);
4337 bfd_hash_table_free (&htab->stub_hash_table);
4338 _bfd_elf_link_hash_table_free (obfd);
4339 }
4340
4341 /* Create a ppc64 ELF linker hash table. */
4342
4343 static struct bfd_link_hash_table *
4344 ppc64_elf_link_hash_table_create (bfd *abfd)
4345 {
4346 struct ppc_link_hash_table *htab;
4347 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4348
4349 htab = bfd_zmalloc (amt);
4350 if (htab == NULL)
4351 return NULL;
4352
4353 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4354 sizeof (struct ppc_link_hash_entry),
4355 PPC64_ELF_DATA))
4356 {
4357 free (htab);
4358 return NULL;
4359 }
4360
4361 /* Init the stub hash table too. */
4362 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4363 sizeof (struct ppc_stub_hash_entry)))
4364 {
4365 _bfd_elf_link_hash_table_free (abfd);
4366 return NULL;
4367 }
4368
4369 /* And the branch hash table. */
4370 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4371 sizeof (struct ppc_branch_hash_entry)))
4372 {
4373 bfd_hash_table_free (&htab->stub_hash_table);
4374 _bfd_elf_link_hash_table_free (abfd);
4375 return NULL;
4376 }
4377
4378 htab->tocsave_htab = htab_try_create (1024,
4379 tocsave_htab_hash,
4380 tocsave_htab_eq,
4381 NULL);
4382 if (htab->tocsave_htab == NULL)
4383 {
4384 ppc64_elf_link_hash_table_free (abfd);
4385 return NULL;
4386 }
4387 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4388
4389 /* Initializing two fields of the union is just cosmetic. We really
4390 only care about glist, but when compiled on a 32-bit host the
4391 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4392 debugger inspection of these fields look nicer. */
4393 htab->elf.init_got_refcount.refcount = 0;
4394 htab->elf.init_got_refcount.glist = NULL;
4395 htab->elf.init_plt_refcount.refcount = 0;
4396 htab->elf.init_plt_refcount.glist = NULL;
4397 htab->elf.init_got_offset.offset = 0;
4398 htab->elf.init_got_offset.glist = NULL;
4399 htab->elf.init_plt_offset.offset = 0;
4400 htab->elf.init_plt_offset.glist = NULL;
4401
4402 return &htab->elf.root;
4403 }
4404
4405 /* Create sections for linker generated code. */
4406
4407 static bfd_boolean
4408 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4409 {
4410 struct ppc_link_hash_table *htab;
4411 flagword flags;
4412
4413 htab = ppc_hash_table (info);
4414
4415 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4416 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4417 if (htab->params->save_restore_funcs)
4418 {
4419 /* Create .sfpr for code to save and restore fp regs. */
4420 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4421 flags);
4422 if (htab->sfpr == NULL
4423 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4424 return FALSE;
4425 }
4426
4427 if (bfd_link_relocatable (info))
4428 return TRUE;
4429
4430 /* Create .glink for lazy dynamic linking support. */
4431 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4432 flags);
4433 if (htab->glink == NULL
4434 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4435 return FALSE;
4436
4437 if (!info->no_ld_generated_unwind_info)
4438 {
4439 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4440 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4441 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4442 ".eh_frame",
4443 flags);
4444 if (htab->glink_eh_frame == NULL
4445 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4446 return FALSE;
4447 }
4448
4449 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4450 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4451 if (htab->elf.iplt == NULL
4452 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4453 return FALSE;
4454
4455 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4456 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4457 htab->elf.irelplt
4458 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4459 if (htab->elf.irelplt == NULL
4460 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4461 return FALSE;
4462
4463 /* Create branch lookup table for plt_branch stubs. */
4464 flags = (SEC_ALLOC | SEC_LOAD
4465 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4466 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4467 flags);
4468 if (htab->brlt == NULL
4469 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4470 return FALSE;
4471
4472 if (!bfd_link_pic (info))
4473 return TRUE;
4474
4475 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4476 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4477 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4478 ".rela.branch_lt",
4479 flags);
4480 if (htab->relbrlt == NULL
4481 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4482 return FALSE;
4483
4484 return TRUE;
4485 }
4486
4487 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4488
4489 bfd_boolean
4490 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4491 struct ppc64_elf_params *params)
4492 {
4493 struct ppc_link_hash_table *htab;
4494
4495 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4496
4497 /* Always hook our dynamic sections into the first bfd, which is the
4498 linker created stub bfd. This ensures that the GOT header is at
4499 the start of the output TOC section. */
4500 htab = ppc_hash_table (info);
4501 htab->elf.dynobj = params->stub_bfd;
4502 htab->params = params;
4503
4504 return create_linkage_sections (htab->elf.dynobj, info);
4505 }
4506
4507 /* Build a name for an entry in the stub hash table. */
4508
4509 static char *
4510 ppc_stub_name (const asection *input_section,
4511 const asection *sym_sec,
4512 const struct ppc_link_hash_entry *h,
4513 const Elf_Internal_Rela *rel)
4514 {
4515 char *stub_name;
4516 ssize_t len;
4517
4518 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4519 offsets from a sym as a branch target? In fact, we could
4520 probably assume the addend is always zero. */
4521 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4522
4523 if (h)
4524 {
4525 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4526 stub_name = bfd_malloc (len);
4527 if (stub_name == NULL)
4528 return stub_name;
4529
4530 len = sprintf (stub_name, "%08x.%s+%x",
4531 input_section->id & 0xffffffff,
4532 h->elf.root.root.string,
4533 (int) rel->r_addend & 0xffffffff);
4534 }
4535 else
4536 {
4537 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4538 stub_name = bfd_malloc (len);
4539 if (stub_name == NULL)
4540 return stub_name;
4541
4542 len = sprintf (stub_name, "%08x.%x:%x+%x",
4543 input_section->id & 0xffffffff,
4544 sym_sec->id & 0xffffffff,
4545 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4546 (int) rel->r_addend & 0xffffffff);
4547 }
4548 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4549 stub_name[len - 2] = 0;
4550 return stub_name;
4551 }
4552
4553 /* Look up an entry in the stub hash. Stub entries are cached because
4554 creating the stub name takes a bit of time. */
4555
4556 static struct ppc_stub_hash_entry *
4557 ppc_get_stub_entry (const asection *input_section,
4558 const asection *sym_sec,
4559 struct ppc_link_hash_entry *h,
4560 const Elf_Internal_Rela *rel,
4561 struct ppc_link_hash_table *htab)
4562 {
4563 struct ppc_stub_hash_entry *stub_entry;
4564 struct map_stub *group;
4565
4566 /* If this input section is part of a group of sections sharing one
4567 stub section, then use the id of the first section in the group.
4568 Stub names need to include a section id, as there may well be
4569 more than one stub used to reach say, printf, and we need to
4570 distinguish between them. */
4571 group = htab->sec_info[input_section->id].u.group;
4572 if (group == NULL)
4573 return NULL;
4574
4575 if (h != NULL && h->u.stub_cache != NULL
4576 && h->u.stub_cache->h == h
4577 && h->u.stub_cache->group == group)
4578 {
4579 stub_entry = h->u.stub_cache;
4580 }
4581 else
4582 {
4583 char *stub_name;
4584
4585 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4586 if (stub_name == NULL)
4587 return NULL;
4588
4589 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4590 stub_name, FALSE, FALSE);
4591 if (h != NULL)
4592 h->u.stub_cache = stub_entry;
4593
4594 free (stub_name);
4595 }
4596
4597 return stub_entry;
4598 }
4599
4600 /* Add a new stub entry to the stub hash. Not all fields of the new
4601 stub entry are initialised. */
4602
4603 static struct ppc_stub_hash_entry *
4604 ppc_add_stub (const char *stub_name,
4605 asection *section,
4606 struct bfd_link_info *info)
4607 {
4608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4609 struct map_stub *group;
4610 asection *link_sec;
4611 asection *stub_sec;
4612 struct ppc_stub_hash_entry *stub_entry;
4613
4614 group = htab->sec_info[section->id].u.group;
4615 link_sec = group->link_sec;
4616 stub_sec = group->stub_sec;
4617 if (stub_sec == NULL)
4618 {
4619 size_t namelen;
4620 bfd_size_type len;
4621 char *s_name;
4622
4623 namelen = strlen (link_sec->name);
4624 len = namelen + sizeof (STUB_SUFFIX);
4625 s_name = bfd_alloc (htab->params->stub_bfd, len);
4626 if (s_name == NULL)
4627 return NULL;
4628
4629 memcpy (s_name, link_sec->name, namelen);
4630 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4631 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4632 if (stub_sec == NULL)
4633 return NULL;
4634 group->stub_sec = stub_sec;
4635 }
4636
4637 /* Enter this entry into the linker stub hash table. */
4638 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4639 TRUE, FALSE);
4640 if (stub_entry == NULL)
4641 {
4642 /* xgettext:c-format */
4643 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4644 section->owner, stub_name);
4645 return NULL;
4646 }
4647
4648 stub_entry->group = group;
4649 stub_entry->stub_offset = 0;
4650 return stub_entry;
4651 }
4652
4653 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4654 not already done. */
4655
4656 static bfd_boolean
4657 create_got_section (bfd *abfd, struct bfd_link_info *info)
4658 {
4659 asection *got, *relgot;
4660 flagword flags;
4661 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4662
4663 if (!is_ppc64_elf (abfd))
4664 return FALSE;
4665 if (htab == NULL)
4666 return FALSE;
4667
4668 if (!htab->elf.sgot
4669 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4670 return FALSE;
4671
4672 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4673 | SEC_LINKER_CREATED);
4674
4675 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4676 if (!got
4677 || !bfd_set_section_alignment (abfd, got, 3))
4678 return FALSE;
4679
4680 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4681 flags | SEC_READONLY);
4682 if (!relgot
4683 || ! bfd_set_section_alignment (abfd, relgot, 3))
4684 return FALSE;
4685
4686 ppc64_elf_tdata (abfd)->got = got;
4687 ppc64_elf_tdata (abfd)->relgot = relgot;
4688 return TRUE;
4689 }
4690
4691 /* Follow indirect and warning symbol links. */
4692
4693 static inline struct bfd_link_hash_entry *
4694 follow_link (struct bfd_link_hash_entry *h)
4695 {
4696 while (h->type == bfd_link_hash_indirect
4697 || h->type == bfd_link_hash_warning)
4698 h = h->u.i.link;
4699 return h;
4700 }
4701
4702 static inline struct elf_link_hash_entry *
4703 elf_follow_link (struct elf_link_hash_entry *h)
4704 {
4705 return (struct elf_link_hash_entry *) follow_link (&h->root);
4706 }
4707
4708 static inline struct ppc_link_hash_entry *
4709 ppc_follow_link (struct ppc_link_hash_entry *h)
4710 {
4711 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4712 }
4713
4714 /* Merge PLT info on FROM with that on TO. */
4715
4716 static void
4717 move_plt_plist (struct ppc_link_hash_entry *from,
4718 struct ppc_link_hash_entry *to)
4719 {
4720 if (from->elf.plt.plist != NULL)
4721 {
4722 if (to->elf.plt.plist != NULL)
4723 {
4724 struct plt_entry **entp;
4725 struct plt_entry *ent;
4726
4727 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4728 {
4729 struct plt_entry *dent;
4730
4731 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4732 if (dent->addend == ent->addend)
4733 {
4734 dent->plt.refcount += ent->plt.refcount;
4735 *entp = ent->next;
4736 break;
4737 }
4738 if (dent == NULL)
4739 entp = &ent->next;
4740 }
4741 *entp = to->elf.plt.plist;
4742 }
4743
4744 to->elf.plt.plist = from->elf.plt.plist;
4745 from->elf.plt.plist = NULL;
4746 }
4747 }
4748
4749 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4750
4751 static void
4752 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4753 struct elf_link_hash_entry *dir,
4754 struct elf_link_hash_entry *ind)
4755 {
4756 struct ppc_link_hash_entry *edir, *eind;
4757
4758 edir = (struct ppc_link_hash_entry *) dir;
4759 eind = (struct ppc_link_hash_entry *) ind;
4760
4761 edir->is_func |= eind->is_func;
4762 edir->is_func_descriptor |= eind->is_func_descriptor;
4763 edir->tls_mask |= eind->tls_mask;
4764 if (eind->oh != NULL)
4765 edir->oh = ppc_follow_link (eind->oh);
4766
4767 /* If called to transfer flags for a weakdef during processing
4768 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4769 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4770 if (!(ELIMINATE_COPY_RELOCS
4771 && eind->elf.root.type != bfd_link_hash_indirect
4772 && edir->elf.dynamic_adjusted))
4773 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4774
4775 if (edir->elf.versioned != versioned_hidden)
4776 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4777 edir->elf.ref_regular |= eind->elf.ref_regular;
4778 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4779 edir->elf.needs_plt |= eind->elf.needs_plt;
4780 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4781
4782 /* If we were called to copy over info for a weak sym, don't copy
4783 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4784 in order to simplify readonly_dynrelocs and save a field in the
4785 symbol hash entry, but that means dyn_relocs can't be used in any
4786 tests about a specific symbol, or affect other symbol flags which
4787 are then tested.
4788 Chain weakdefs so we can get from the weakdef back to an alias.
4789 The list is circular so that we don't need to use u.weakdef as
4790 well as this list to look at all aliases. */
4791 if (eind->elf.root.type != bfd_link_hash_indirect)
4792 {
4793 struct ppc_link_hash_entry *cur, *add, *next;
4794
4795 add = eind;
4796 do
4797 {
4798 cur = edir->weakref;
4799 if (cur != NULL)
4800 {
4801 do
4802 {
4803 /* We can be called twice for the same symbols.
4804 Don't make multiple loops. */
4805 if (cur == add)
4806 return;
4807 cur = cur->weakref;
4808 } while (cur != edir);
4809 }
4810 next = add->weakref;
4811 if (cur != add)
4812 {
4813 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4814 edir->weakref = add;
4815 }
4816 add = next;
4817 } while (add != NULL && add != eind);
4818 return;
4819 }
4820
4821 /* Copy over any dynamic relocs we may have on the indirect sym. */
4822 if (eind->dyn_relocs != NULL)
4823 {
4824 if (edir->dyn_relocs != NULL)
4825 {
4826 struct elf_dyn_relocs **pp;
4827 struct elf_dyn_relocs *p;
4828
4829 /* Add reloc counts against the indirect sym to the direct sym
4830 list. Merge any entries against the same section. */
4831 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4832 {
4833 struct elf_dyn_relocs *q;
4834
4835 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4836 if (q->sec == p->sec)
4837 {
4838 q->pc_count += p->pc_count;
4839 q->count += p->count;
4840 *pp = p->next;
4841 break;
4842 }
4843 if (q == NULL)
4844 pp = &p->next;
4845 }
4846 *pp = edir->dyn_relocs;
4847 }
4848
4849 edir->dyn_relocs = eind->dyn_relocs;
4850 eind->dyn_relocs = NULL;
4851 }
4852
4853 /* Copy over got entries that we may have already seen to the
4854 symbol which just became indirect. */
4855 if (eind->elf.got.glist != NULL)
4856 {
4857 if (edir->elf.got.glist != NULL)
4858 {
4859 struct got_entry **entp;
4860 struct got_entry *ent;
4861
4862 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4863 {
4864 struct got_entry *dent;
4865
4866 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4867 if (dent->addend == ent->addend
4868 && dent->owner == ent->owner
4869 && dent->tls_type == ent->tls_type)
4870 {
4871 dent->got.refcount += ent->got.refcount;
4872 *entp = ent->next;
4873 break;
4874 }
4875 if (dent == NULL)
4876 entp = &ent->next;
4877 }
4878 *entp = edir->elf.got.glist;
4879 }
4880
4881 edir->elf.got.glist = eind->elf.got.glist;
4882 eind->elf.got.glist = NULL;
4883 }
4884
4885 /* And plt entries. */
4886 move_plt_plist (eind, edir);
4887
4888 if (eind->elf.dynindx != -1)
4889 {
4890 if (edir->elf.dynindx != -1)
4891 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4892 edir->elf.dynstr_index);
4893 edir->elf.dynindx = eind->elf.dynindx;
4894 edir->elf.dynstr_index = eind->elf.dynstr_index;
4895 eind->elf.dynindx = -1;
4896 eind->elf.dynstr_index = 0;
4897 }
4898 }
4899
4900 /* Find the function descriptor hash entry from the given function code
4901 hash entry FH. Link the entries via their OH fields. */
4902
4903 static struct ppc_link_hash_entry *
4904 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4905 {
4906 struct ppc_link_hash_entry *fdh = fh->oh;
4907
4908 if (fdh == NULL)
4909 {
4910 const char *fd_name = fh->elf.root.root.string + 1;
4911
4912 fdh = (struct ppc_link_hash_entry *)
4913 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4914 if (fdh == NULL)
4915 return fdh;
4916
4917 fdh->is_func_descriptor = 1;
4918 fdh->oh = fh;
4919 fh->is_func = 1;
4920 fh->oh = fdh;
4921 }
4922
4923 fdh = ppc_follow_link (fdh);
4924 fdh->is_func_descriptor = 1;
4925 fdh->oh = fh;
4926 return fdh;
4927 }
4928
4929 /* Make a fake function descriptor sym for the undefined code sym FH. */
4930
4931 static struct ppc_link_hash_entry *
4932 make_fdh (struct bfd_link_info *info,
4933 struct ppc_link_hash_entry *fh)
4934 {
4935 bfd *abfd = fh->elf.root.u.undef.abfd;
4936 struct bfd_link_hash_entry *bh = NULL;
4937 struct ppc_link_hash_entry *fdh;
4938 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4939 ? BSF_WEAK
4940 : BSF_GLOBAL);
4941
4942 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4943 fh->elf.root.root.string + 1,
4944 flags, bfd_und_section_ptr, 0,
4945 NULL, FALSE, FALSE, &bh))
4946 return NULL;
4947
4948 fdh = (struct ppc_link_hash_entry *) bh;
4949 fdh->elf.non_elf = 0;
4950 fdh->fake = 1;
4951 fdh->is_func_descriptor = 1;
4952 fdh->oh = fh;
4953 fh->is_func = 1;
4954 fh->oh = fdh;
4955 return fdh;
4956 }
4957
4958 /* Fix function descriptor symbols defined in .opd sections to be
4959 function type. */
4960
4961 static bfd_boolean
4962 ppc64_elf_add_symbol_hook (bfd *ibfd,
4963 struct bfd_link_info *info,
4964 Elf_Internal_Sym *isym,
4965 const char **name,
4966 flagword *flags ATTRIBUTE_UNUSED,
4967 asection **sec,
4968 bfd_vma *value)
4969 {
4970 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4971 && (ibfd->flags & DYNAMIC) == 0
4972 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4973 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4974
4975 if (*sec != NULL
4976 && strcmp ((*sec)->name, ".opd") == 0)
4977 {
4978 asection *code_sec;
4979
4980 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4981 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4982 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4983
4984 /* If the symbol is a function defined in .opd, and the function
4985 code is in a discarded group, let it appear to be undefined. */
4986 if (!bfd_link_relocatable (info)
4987 && (*sec)->reloc_count != 0
4988 && opd_entry_value (*sec, *value, &code_sec, NULL,
4989 FALSE) != (bfd_vma) -1
4990 && discarded_section (code_sec))
4991 {
4992 *sec = bfd_und_section_ptr;
4993 isym->st_shndx = SHN_UNDEF;
4994 }
4995 }
4996 else if (*sec != NULL
4997 && strcmp ((*sec)->name, ".toc") == 0
4998 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4999 {
5000 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5001 if (htab != NULL)
5002 htab->params->object_in_toc = 1;
5003 }
5004
5005 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5006 {
5007 if (abiversion (ibfd) == 0)
5008 set_abiversion (ibfd, 2);
5009 else if (abiversion (ibfd) == 1)
5010 {
5011 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
5012 " for ABI version 1\n"), name);
5013 bfd_set_error (bfd_error_bad_value);
5014 return FALSE;
5015 }
5016 }
5017
5018 return TRUE;
5019 }
5020
5021 /* Merge non-visibility st_other attributes: local entry point. */
5022
5023 static void
5024 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
5025 const Elf_Internal_Sym *isym,
5026 bfd_boolean definition,
5027 bfd_boolean dynamic)
5028 {
5029 if (definition && (!dynamic || !h->def_regular))
5030 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5031 | ELF_ST_VISIBILITY (h->other));
5032 }
5033
5034 /* Hook called on merging a symbol. We use this to clear "fake" since
5035 we now have a real symbol. */
5036
5037 static bfd_boolean
5038 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5039 const Elf_Internal_Sym *isym,
5040 asection **psec ATTRIBUTE_UNUSED,
5041 bfd_boolean newdef ATTRIBUTE_UNUSED,
5042 bfd_boolean olddef ATTRIBUTE_UNUSED,
5043 bfd *oldbfd ATTRIBUTE_UNUSED,
5044 const asection *oldsec ATTRIBUTE_UNUSED)
5045 {
5046 ((struct ppc_link_hash_entry *) h)->fake = 0;
5047 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
5048 ((struct ppc_link_hash_entry *) h)->non_zero_localentry = 1;
5049 return TRUE;
5050 }
5051
5052 /* This function makes an old ABI object reference to ".bar" cause the
5053 inclusion of a new ABI object archive that defines "bar".
5054 NAME is a symbol defined in an archive. Return a symbol in the hash
5055 table that might be satisfied by the archive symbols. */
5056
5057 static struct elf_link_hash_entry *
5058 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5059 struct bfd_link_info *info,
5060 const char *name)
5061 {
5062 struct elf_link_hash_entry *h;
5063 char *dot_name;
5064 size_t len;
5065
5066 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5067 if (h != NULL
5068 /* Don't return this sym if it is a fake function descriptor
5069 created by add_symbol_adjust. */
5070 && !((struct ppc_link_hash_entry *) h)->fake)
5071 return h;
5072
5073 if (name[0] == '.')
5074 return h;
5075
5076 len = strlen (name);
5077 dot_name = bfd_alloc (abfd, len + 2);
5078 if (dot_name == NULL)
5079 return (struct elf_link_hash_entry *) 0 - 1;
5080 dot_name[0] = '.';
5081 memcpy (dot_name + 1, name, len + 1);
5082 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5083 bfd_release (abfd, dot_name);
5084 return h;
5085 }
5086
5087 /* This function satisfies all old ABI object references to ".bar" if a
5088 new ABI object defines "bar". Well, at least, undefined dot symbols
5089 are made weak. This stops later archive searches from including an
5090 object if we already have a function descriptor definition. It also
5091 prevents the linker complaining about undefined symbols.
5092 We also check and correct mismatched symbol visibility here. The
5093 most restrictive visibility of the function descriptor and the
5094 function entry symbol is used. */
5095
5096 static bfd_boolean
5097 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5098 {
5099 struct ppc_link_hash_table *htab;
5100 struct ppc_link_hash_entry *fdh;
5101
5102 if (eh->elf.root.type == bfd_link_hash_warning)
5103 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5104
5105 if (eh->elf.root.type == bfd_link_hash_indirect)
5106 return TRUE;
5107
5108 if (eh->elf.root.root.string[0] != '.')
5109 abort ();
5110
5111 htab = ppc_hash_table (info);
5112 if (htab == NULL)
5113 return FALSE;
5114
5115 fdh = lookup_fdh (eh, htab);
5116 if (fdh == NULL
5117 && !bfd_link_relocatable (info)
5118 && (eh->elf.root.type == bfd_link_hash_undefined
5119 || eh->elf.root.type == bfd_link_hash_undefweak)
5120 && eh->elf.ref_regular)
5121 {
5122 /* Make an undefined function descriptor sym, in order to
5123 pull in an --as-needed shared lib. Archives are handled
5124 elsewhere. */
5125 fdh = make_fdh (info, eh);
5126 if (fdh == NULL)
5127 return FALSE;
5128 }
5129
5130 if (fdh != NULL)
5131 {
5132 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5133 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5134
5135 /* Make both descriptor and entry symbol have the most
5136 constraining visibility of either symbol. */
5137 if (entry_vis < descr_vis)
5138 fdh->elf.other += entry_vis - descr_vis;
5139 else if (entry_vis > descr_vis)
5140 eh->elf.other += descr_vis - entry_vis;
5141
5142 /* Propagate reference flags from entry symbol to function
5143 descriptor symbol. */
5144 fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular;
5145 fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic;
5146 fdh->elf.ref_regular |= eh->elf.ref_regular;
5147 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5148
5149 if (!fdh->elf.forced_local
5150 && fdh->elf.dynindx == -1
5151 && fdh->elf.versioned != versioned_hidden
5152 && (bfd_link_dll (info)
5153 || fdh->elf.def_dynamic
5154 || fdh->elf.ref_dynamic)
5155 && (eh->elf.ref_regular
5156 || eh->elf.def_regular))
5157 {
5158 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5159 return FALSE;
5160 }
5161 }
5162
5163 return TRUE;
5164 }
5165
5166 /* Set up opd section info and abiversion for IBFD, and process list
5167 of dot-symbols we made in link_hash_newfunc. */
5168
5169 static bfd_boolean
5170 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5171 {
5172 struct ppc_link_hash_table *htab;
5173 struct ppc_link_hash_entry **p, *eh;
5174 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5175
5176 if (opd != NULL && opd->size != 0)
5177 {
5178 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5179 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5180
5181 if (abiversion (ibfd) == 0)
5182 set_abiversion (ibfd, 1);
5183 else if (abiversion (ibfd) >= 2)
5184 {
5185 /* xgettext:c-format */
5186 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5187 " version %d\n"),
5188 ibfd, abiversion (ibfd));
5189 bfd_set_error (bfd_error_bad_value);
5190 return FALSE;
5191 }
5192 }
5193
5194 if (is_ppc64_elf (info->output_bfd))
5195 {
5196 /* For input files without an explicit abiversion in e_flags
5197 we should have flagged any with symbol st_other bits set
5198 as ELFv1 and above flagged those with .opd as ELFv2.
5199 Set the output abiversion if not yet set, and for any input
5200 still ambiguous, take its abiversion from the output.
5201 Differences in ABI are reported later. */
5202 if (abiversion (info->output_bfd) == 0)
5203 set_abiversion (info->output_bfd, abiversion (ibfd));
5204 else if (abiversion (ibfd) == 0)
5205 set_abiversion (ibfd, abiversion (info->output_bfd));
5206 }
5207
5208 htab = ppc_hash_table (info);
5209 if (htab == NULL)
5210 return TRUE;
5211
5212 if (opd != NULL && opd->size != 0
5213 && (ibfd->flags & DYNAMIC) == 0
5214 && (opd->flags & SEC_RELOC) != 0
5215 && opd->reloc_count != 0
5216 && !bfd_is_abs_section (opd->output_section)
5217 && info->gc_sections)
5218 {
5219 /* Garbage collection needs some extra help with .opd sections.
5220 We don't want to necessarily keep everything referenced by
5221 relocs in .opd, as that would keep all functions. Instead,
5222 if we reference an .opd symbol (a function descriptor), we
5223 want to keep the function code symbol's section. This is
5224 easy for global symbols, but for local syms we need to keep
5225 information about the associated function section. */
5226 bfd_size_type amt;
5227 asection **opd_sym_map;
5228 Elf_Internal_Shdr *symtab_hdr;
5229 Elf_Internal_Rela *relocs, *rel_end, *rel;
5230
5231 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5232 opd_sym_map = bfd_zalloc (ibfd, amt);
5233 if (opd_sym_map == NULL)
5234 return FALSE;
5235 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5236 relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL,
5237 info->keep_memory);
5238 if (relocs == NULL)
5239 return FALSE;
5240 symtab_hdr = &elf_symtab_hdr (ibfd);
5241 rel_end = relocs + opd->reloc_count - 1;
5242 for (rel = relocs; rel < rel_end; rel++)
5243 {
5244 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
5245 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
5246
5247 if (r_type == R_PPC64_ADDR64
5248 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC
5249 && r_symndx < symtab_hdr->sh_info)
5250 {
5251 Elf_Internal_Sym *isym;
5252 asection *s;
5253
5254 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx);
5255 if (isym == NULL)
5256 {
5257 if (elf_section_data (opd)->relocs != relocs)
5258 free (relocs);
5259 return FALSE;
5260 }
5261
5262 s = bfd_section_from_elf_index (ibfd, isym->st_shndx);
5263 if (s != NULL && s != opd)
5264 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5265 }
5266 }
5267 if (elf_section_data (opd)->relocs != relocs)
5268 free (relocs);
5269 }
5270
5271 p = &htab->dot_syms;
5272 while ((eh = *p) != NULL)
5273 {
5274 *p = NULL;
5275 if (&eh->elf == htab->elf.hgot)
5276 ;
5277 else if (htab->elf.hgot == NULL
5278 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5279 htab->elf.hgot = &eh->elf;
5280 else if (abiversion (ibfd) <= 1)
5281 {
5282 htab->need_func_desc_adj = 1;
5283 if (!add_symbol_adjust (eh, info))
5284 return FALSE;
5285 }
5286 p = &eh->u.next_dot_sym;
5287 }
5288 return TRUE;
5289 }
5290
5291 /* Undo hash table changes when an --as-needed input file is determined
5292 not to be needed. */
5293
5294 static bfd_boolean
5295 ppc64_elf_notice_as_needed (bfd *ibfd,
5296 struct bfd_link_info *info,
5297 enum notice_asneeded_action act)
5298 {
5299 if (act == notice_not_needed)
5300 {
5301 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5302
5303 if (htab == NULL)
5304 return FALSE;
5305
5306 htab->dot_syms = NULL;
5307 }
5308 return _bfd_elf_notice_as_needed (ibfd, info, act);
5309 }
5310
5311 /* If --just-symbols against a final linked binary, then assume we need
5312 toc adjusting stubs when calling functions defined there. */
5313
5314 static void
5315 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5316 {
5317 if ((sec->flags & SEC_CODE) != 0
5318 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5319 && is_ppc64_elf (sec->owner))
5320 {
5321 if (abiversion (sec->owner) >= 2
5322 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5323 sec->has_toc_reloc = 1;
5324 }
5325 _bfd_elf_link_just_syms (sec, info);
5326 }
5327
5328 static struct plt_entry **
5329 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5330 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5331 {
5332 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5333 struct plt_entry **local_plt;
5334 unsigned char *local_got_tls_masks;
5335
5336 if (local_got_ents == NULL)
5337 {
5338 bfd_size_type size = symtab_hdr->sh_info;
5339
5340 size *= (sizeof (*local_got_ents)
5341 + sizeof (*local_plt)
5342 + sizeof (*local_got_tls_masks));
5343 local_got_ents = bfd_zalloc (abfd, size);
5344 if (local_got_ents == NULL)
5345 return NULL;
5346 elf_local_got_ents (abfd) = local_got_ents;
5347 }
5348
5349 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5350 {
5351 struct got_entry *ent;
5352
5353 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5354 if (ent->addend == r_addend
5355 && ent->owner == abfd
5356 && ent->tls_type == tls_type)
5357 break;
5358 if (ent == NULL)
5359 {
5360 bfd_size_type amt = sizeof (*ent);
5361 ent = bfd_alloc (abfd, amt);
5362 if (ent == NULL)
5363 return FALSE;
5364 ent->next = local_got_ents[r_symndx];
5365 ent->addend = r_addend;
5366 ent->owner = abfd;
5367 ent->tls_type = tls_type;
5368 ent->is_indirect = FALSE;
5369 ent->got.refcount = 0;
5370 local_got_ents[r_symndx] = ent;
5371 }
5372 ent->got.refcount += 1;
5373 }
5374
5375 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5376 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5377 local_got_tls_masks[r_symndx] |= tls_type;
5378
5379 return local_plt + r_symndx;
5380 }
5381
5382 static bfd_boolean
5383 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5384 {
5385 struct plt_entry *ent;
5386
5387 for (ent = *plist; ent != NULL; ent = ent->next)
5388 if (ent->addend == addend)
5389 break;
5390 if (ent == NULL)
5391 {
5392 bfd_size_type amt = sizeof (*ent);
5393 ent = bfd_alloc (abfd, amt);
5394 if (ent == NULL)
5395 return FALSE;
5396 ent->next = *plist;
5397 ent->addend = addend;
5398 ent->plt.refcount = 0;
5399 *plist = ent;
5400 }
5401 ent->plt.refcount += 1;
5402 return TRUE;
5403 }
5404
5405 static bfd_boolean
5406 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5407 {
5408 return (r_type == R_PPC64_REL24
5409 || r_type == R_PPC64_REL14
5410 || r_type == R_PPC64_REL14_BRTAKEN
5411 || r_type == R_PPC64_REL14_BRNTAKEN
5412 || r_type == R_PPC64_ADDR24
5413 || r_type == R_PPC64_ADDR14
5414 || r_type == R_PPC64_ADDR14_BRTAKEN
5415 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5416 }
5417
5418 /* Look through the relocs for a section during the first phase, and
5419 calculate needed space in the global offset table, procedure
5420 linkage table, and dynamic reloc sections. */
5421
5422 static bfd_boolean
5423 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5424 asection *sec, const Elf_Internal_Rela *relocs)
5425 {
5426 struct ppc_link_hash_table *htab;
5427 Elf_Internal_Shdr *symtab_hdr;
5428 struct elf_link_hash_entry **sym_hashes;
5429 const Elf_Internal_Rela *rel;
5430 const Elf_Internal_Rela *rel_end;
5431 asection *sreloc;
5432 struct elf_link_hash_entry *tga, *dottga;
5433 bfd_boolean is_opd;
5434
5435 if (bfd_link_relocatable (info))
5436 return TRUE;
5437
5438 /* Don't do anything special with non-loaded, non-alloced sections.
5439 In particular, any relocs in such sections should not affect GOT
5440 and PLT reference counting (ie. we don't allow them to create GOT
5441 or PLT entries), there's no possibility or desire to optimize TLS
5442 relocs, and there's not much point in propagating relocs to shared
5443 libs that the dynamic linker won't relocate. */
5444 if ((sec->flags & SEC_ALLOC) == 0)
5445 return TRUE;
5446
5447 BFD_ASSERT (is_ppc64_elf (abfd));
5448
5449 htab = ppc_hash_table (info);
5450 if (htab == NULL)
5451 return FALSE;
5452
5453 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5454 FALSE, FALSE, TRUE);
5455 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5456 FALSE, FALSE, TRUE);
5457 symtab_hdr = &elf_symtab_hdr (abfd);
5458 sym_hashes = elf_sym_hashes (abfd);
5459 sreloc = NULL;
5460 is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd;
5461 rel_end = relocs + sec->reloc_count;
5462 for (rel = relocs; rel < rel_end; rel++)
5463 {
5464 unsigned long r_symndx;
5465 struct elf_link_hash_entry *h;
5466 enum elf_ppc64_reloc_type r_type;
5467 int tls_type;
5468 struct _ppc64_elf_section_data *ppc64_sec;
5469 struct plt_entry **ifunc, **plt_list;
5470
5471 r_symndx = ELF64_R_SYM (rel->r_info);
5472 if (r_symndx < symtab_hdr->sh_info)
5473 h = NULL;
5474 else
5475 {
5476 struct ppc_link_hash_entry *eh;
5477
5478 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5479 h = elf_follow_link (h);
5480 eh = (struct ppc_link_hash_entry *) h;
5481
5482 /* PR15323, ref flags aren't set for references in the same
5483 object. */
5484 h->root.non_ir_ref_regular = 1;
5485 if (eh->is_func && eh->oh != NULL)
5486 eh->oh->elf.root.non_ir_ref_regular = 1;
5487
5488 if (h == htab->elf.hgot)
5489 sec->has_toc_reloc = 1;
5490 }
5491
5492 tls_type = 0;
5493 ifunc = NULL;
5494 if (h != NULL)
5495 {
5496 if (h->type == STT_GNU_IFUNC)
5497 {
5498 h->needs_plt = 1;
5499 ifunc = &h->plt.plist;
5500 }
5501 }
5502 else
5503 {
5504 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5505 abfd, r_symndx);
5506 if (isym == NULL)
5507 return FALSE;
5508
5509 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5510 {
5511 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5512 rel->r_addend, PLT_IFUNC);
5513 if (ifunc == NULL)
5514 return FALSE;
5515 }
5516 }
5517
5518 r_type = ELF64_R_TYPE (rel->r_info);
5519 switch (r_type)
5520 {
5521 case R_PPC64_TLSGD:
5522 case R_PPC64_TLSLD:
5523 /* These special tls relocs tie a call to __tls_get_addr with
5524 its parameter symbol. */
5525 break;
5526
5527 case R_PPC64_GOT_TLSLD16:
5528 case R_PPC64_GOT_TLSLD16_LO:
5529 case R_PPC64_GOT_TLSLD16_HI:
5530 case R_PPC64_GOT_TLSLD16_HA:
5531 tls_type = TLS_TLS | TLS_LD;
5532 goto dogottls;
5533
5534 case R_PPC64_GOT_TLSGD16:
5535 case R_PPC64_GOT_TLSGD16_LO:
5536 case R_PPC64_GOT_TLSGD16_HI:
5537 case R_PPC64_GOT_TLSGD16_HA:
5538 tls_type = TLS_TLS | TLS_GD;
5539 goto dogottls;
5540
5541 case R_PPC64_GOT_TPREL16_DS:
5542 case R_PPC64_GOT_TPREL16_LO_DS:
5543 case R_PPC64_GOT_TPREL16_HI:
5544 case R_PPC64_GOT_TPREL16_HA:
5545 if (bfd_link_dll (info))
5546 info->flags |= DF_STATIC_TLS;
5547 tls_type = TLS_TLS | TLS_TPREL;
5548 goto dogottls;
5549
5550 case R_PPC64_GOT_DTPREL16_DS:
5551 case R_PPC64_GOT_DTPREL16_LO_DS:
5552 case R_PPC64_GOT_DTPREL16_HI:
5553 case R_PPC64_GOT_DTPREL16_HA:
5554 tls_type = TLS_TLS | TLS_DTPREL;
5555 dogottls:
5556 sec->has_tls_reloc = 1;
5557 /* Fall through */
5558
5559 case R_PPC64_GOT16:
5560 case R_PPC64_GOT16_DS:
5561 case R_PPC64_GOT16_HA:
5562 case R_PPC64_GOT16_HI:
5563 case R_PPC64_GOT16_LO:
5564 case R_PPC64_GOT16_LO_DS:
5565 /* This symbol requires a global offset table entry. */
5566 sec->has_toc_reloc = 1;
5567 if (r_type == R_PPC64_GOT_TLSLD16
5568 || r_type == R_PPC64_GOT_TLSGD16
5569 || r_type == R_PPC64_GOT_TPREL16_DS
5570 || r_type == R_PPC64_GOT_DTPREL16_DS
5571 || r_type == R_PPC64_GOT16
5572 || r_type == R_PPC64_GOT16_DS)
5573 {
5574 htab->do_multi_toc = 1;
5575 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5576 }
5577
5578 if (ppc64_elf_tdata (abfd)->got == NULL
5579 && !create_got_section (abfd, info))
5580 return FALSE;
5581
5582 if (h != NULL)
5583 {
5584 struct ppc_link_hash_entry *eh;
5585 struct got_entry *ent;
5586
5587 eh = (struct ppc_link_hash_entry *) h;
5588 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5589 if (ent->addend == rel->r_addend
5590 && ent->owner == abfd
5591 && ent->tls_type == tls_type)
5592 break;
5593 if (ent == NULL)
5594 {
5595 bfd_size_type amt = sizeof (*ent);
5596 ent = bfd_alloc (abfd, amt);
5597 if (ent == NULL)
5598 return FALSE;
5599 ent->next = eh->elf.got.glist;
5600 ent->addend = rel->r_addend;
5601 ent->owner = abfd;
5602 ent->tls_type = tls_type;
5603 ent->is_indirect = FALSE;
5604 ent->got.refcount = 0;
5605 eh->elf.got.glist = ent;
5606 }
5607 ent->got.refcount += 1;
5608 eh->tls_mask |= tls_type;
5609 }
5610 else
5611 /* This is a global offset table entry for a local symbol. */
5612 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5613 rel->r_addend, tls_type))
5614 return FALSE;
5615
5616 /* We may also need a plt entry if the symbol turns out to be
5617 an ifunc. */
5618 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5619 {
5620 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5621 return FALSE;
5622 }
5623 break;
5624
5625 case R_PPC64_PLT16_HA:
5626 case R_PPC64_PLT16_HI:
5627 case R_PPC64_PLT16_LO:
5628 case R_PPC64_PLT32:
5629 case R_PPC64_PLT64:
5630 /* This symbol requires a procedure linkage table entry. */
5631 plt_list = ifunc;
5632 if (h != NULL)
5633 {
5634 h->needs_plt = 1;
5635 if (h->root.root.string[0] == '.'
5636 && h->root.root.string[1] != '\0')
5637 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5638 plt_list = &h->plt.plist;
5639 }
5640 if (plt_list == NULL)
5641 {
5642 /* It does not make sense to have a procedure linkage
5643 table entry for a non-ifunc local symbol. */
5644 info->callbacks->einfo
5645 /* xgettext:c-format */
5646 (_("%H: %s reloc against local symbol\n"),
5647 abfd, sec, rel->r_offset,
5648 ppc64_elf_howto_table[r_type]->name);
5649 bfd_set_error (bfd_error_bad_value);
5650 return FALSE;
5651 }
5652 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5653 return FALSE;
5654 break;
5655
5656 /* The following relocations don't need to propagate the
5657 relocation if linking a shared object since they are
5658 section relative. */
5659 case R_PPC64_SECTOFF:
5660 case R_PPC64_SECTOFF_LO:
5661 case R_PPC64_SECTOFF_HI:
5662 case R_PPC64_SECTOFF_HA:
5663 case R_PPC64_SECTOFF_DS:
5664 case R_PPC64_SECTOFF_LO_DS:
5665 case R_PPC64_DTPREL16:
5666 case R_PPC64_DTPREL16_LO:
5667 case R_PPC64_DTPREL16_HI:
5668 case R_PPC64_DTPREL16_HA:
5669 case R_PPC64_DTPREL16_DS:
5670 case R_PPC64_DTPREL16_LO_DS:
5671 case R_PPC64_DTPREL16_HIGH:
5672 case R_PPC64_DTPREL16_HIGHA:
5673 case R_PPC64_DTPREL16_HIGHER:
5674 case R_PPC64_DTPREL16_HIGHERA:
5675 case R_PPC64_DTPREL16_HIGHEST:
5676 case R_PPC64_DTPREL16_HIGHESTA:
5677 break;
5678
5679 /* Nor do these. */
5680 case R_PPC64_REL16:
5681 case R_PPC64_REL16_LO:
5682 case R_PPC64_REL16_HI:
5683 case R_PPC64_REL16_HA:
5684 case R_PPC64_REL16DX_HA:
5685 break;
5686
5687 /* Not supported as a dynamic relocation. */
5688 case R_PPC64_ADDR64_LOCAL:
5689 if (bfd_link_pic (info))
5690 {
5691 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5692 ppc_howto_init ();
5693 /* xgettext:c-format */
5694 info->callbacks->einfo (_("%H: %s reloc unsupported "
5695 "in shared libraries and PIEs.\n"),
5696 abfd, sec, rel->r_offset,
5697 ppc64_elf_howto_table[r_type]->name);
5698 bfd_set_error (bfd_error_bad_value);
5699 return FALSE;
5700 }
5701 break;
5702
5703 case R_PPC64_TOC16:
5704 case R_PPC64_TOC16_DS:
5705 htab->do_multi_toc = 1;
5706 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5707 /* Fall through. */
5708 case R_PPC64_TOC16_LO:
5709 case R_PPC64_TOC16_HI:
5710 case R_PPC64_TOC16_HA:
5711 case R_PPC64_TOC16_LO_DS:
5712 sec->has_toc_reloc = 1;
5713 break;
5714
5715 /* Marker reloc. */
5716 case R_PPC64_ENTRY:
5717 break;
5718
5719 /* This relocation describes the C++ object vtable hierarchy.
5720 Reconstruct it for later use during GC. */
5721 case R_PPC64_GNU_VTINHERIT:
5722 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5723 return FALSE;
5724 break;
5725
5726 /* This relocation describes which C++ vtable entries are actually
5727 used. Record for later use during GC. */
5728 case R_PPC64_GNU_VTENTRY:
5729 BFD_ASSERT (h != NULL);
5730 if (h != NULL
5731 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5732 return FALSE;
5733 break;
5734
5735 case R_PPC64_REL14:
5736 case R_PPC64_REL14_BRTAKEN:
5737 case R_PPC64_REL14_BRNTAKEN:
5738 {
5739 asection *dest = NULL;
5740
5741 /* Heuristic: If jumping outside our section, chances are
5742 we are going to need a stub. */
5743 if (h != NULL)
5744 {
5745 /* If the sym is weak it may be overridden later, so
5746 don't assume we know where a weak sym lives. */
5747 if (h->root.type == bfd_link_hash_defined)
5748 dest = h->root.u.def.section;
5749 }
5750 else
5751 {
5752 Elf_Internal_Sym *isym;
5753
5754 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5755 abfd, r_symndx);
5756 if (isym == NULL)
5757 return FALSE;
5758
5759 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5760 }
5761
5762 if (dest != sec)
5763 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5764 }
5765 /* Fall through. */
5766
5767 case R_PPC64_REL24:
5768 plt_list = ifunc;
5769 if (h != NULL)
5770 {
5771 h->needs_plt = 1;
5772 if (h->root.root.string[0] == '.'
5773 && h->root.root.string[1] != '\0')
5774 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5775
5776 if (h == tga || h == dottga)
5777 {
5778 sec->has_tls_reloc = 1;
5779 if (rel != relocs
5780 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5781 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5782 /* We have a new-style __tls_get_addr call with
5783 a marker reloc. */
5784 ;
5785 else
5786 /* Mark this section as having an old-style call. */
5787 sec->has_tls_get_addr_call = 1;
5788 }
5789 plt_list = &h->plt.plist;
5790 }
5791
5792 /* We may need a .plt entry if the function this reloc
5793 refers to is in a shared lib. */
5794 if (plt_list
5795 && !update_plt_info (abfd, plt_list, rel->r_addend))
5796 return FALSE;
5797 break;
5798
5799 case R_PPC64_ADDR14:
5800 case R_PPC64_ADDR14_BRNTAKEN:
5801 case R_PPC64_ADDR14_BRTAKEN:
5802 case R_PPC64_ADDR24:
5803 goto dodyn;
5804
5805 case R_PPC64_TPREL64:
5806 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5807 if (bfd_link_dll (info))
5808 info->flags |= DF_STATIC_TLS;
5809 goto dotlstoc;
5810
5811 case R_PPC64_DTPMOD64:
5812 if (rel + 1 < rel_end
5813 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5814 && rel[1].r_offset == rel->r_offset + 8)
5815 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5816 else
5817 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5818 goto dotlstoc;
5819
5820 case R_PPC64_DTPREL64:
5821 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5822 if (rel != relocs
5823 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5824 && rel[-1].r_offset == rel->r_offset - 8)
5825 /* This is the second reloc of a dtpmod, dtprel pair.
5826 Don't mark with TLS_DTPREL. */
5827 goto dodyn;
5828
5829 dotlstoc:
5830 sec->has_tls_reloc = 1;
5831 if (h != NULL)
5832 {
5833 struct ppc_link_hash_entry *eh;
5834 eh = (struct ppc_link_hash_entry *) h;
5835 eh->tls_mask |= tls_type;
5836 }
5837 else
5838 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5839 rel->r_addend, tls_type))
5840 return FALSE;
5841
5842 ppc64_sec = ppc64_elf_section_data (sec);
5843 if (ppc64_sec->sec_type != sec_toc)
5844 {
5845 bfd_size_type amt;
5846
5847 /* One extra to simplify get_tls_mask. */
5848 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5849 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5850 if (ppc64_sec->u.toc.symndx == NULL)
5851 return FALSE;
5852 amt = sec->size * sizeof (bfd_vma) / 8;
5853 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5854 if (ppc64_sec->u.toc.add == NULL)
5855 return FALSE;
5856 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5857 ppc64_sec->sec_type = sec_toc;
5858 }
5859 BFD_ASSERT (rel->r_offset % 8 == 0);
5860 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5861 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5862
5863 /* Mark the second slot of a GD or LD entry.
5864 -1 to indicate GD and -2 to indicate LD. */
5865 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5866 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5867 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5868 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5869 goto dodyn;
5870
5871 case R_PPC64_TPREL16:
5872 case R_PPC64_TPREL16_LO:
5873 case R_PPC64_TPREL16_HI:
5874 case R_PPC64_TPREL16_HA:
5875 case R_PPC64_TPREL16_DS:
5876 case R_PPC64_TPREL16_LO_DS:
5877 case R_PPC64_TPREL16_HIGH:
5878 case R_PPC64_TPREL16_HIGHA:
5879 case R_PPC64_TPREL16_HIGHER:
5880 case R_PPC64_TPREL16_HIGHERA:
5881 case R_PPC64_TPREL16_HIGHEST:
5882 case R_PPC64_TPREL16_HIGHESTA:
5883 if (bfd_link_dll (info))
5884 info->flags |= DF_STATIC_TLS;
5885 goto dodyn;
5886
5887 case R_PPC64_ADDR64:
5888 if (is_opd
5889 && rel + 1 < rel_end
5890 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5891 {
5892 if (h != NULL)
5893 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5894 }
5895 /* Fall through. */
5896
5897 case R_PPC64_ADDR16:
5898 case R_PPC64_ADDR16_DS:
5899 case R_PPC64_ADDR16_HA:
5900 case R_PPC64_ADDR16_HI:
5901 case R_PPC64_ADDR16_HIGH:
5902 case R_PPC64_ADDR16_HIGHA:
5903 case R_PPC64_ADDR16_HIGHER:
5904 case R_PPC64_ADDR16_HIGHERA:
5905 case R_PPC64_ADDR16_HIGHEST:
5906 case R_PPC64_ADDR16_HIGHESTA:
5907 case R_PPC64_ADDR16_LO:
5908 case R_PPC64_ADDR16_LO_DS:
5909 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5910 && rel->r_addend == 0)
5911 {
5912 /* We may need a .plt entry if this reloc refers to a
5913 function in a shared lib. */
5914 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5915 return FALSE;
5916 h->pointer_equality_needed = 1;
5917 }
5918 /* Fall through. */
5919
5920 case R_PPC64_REL30:
5921 case R_PPC64_REL32:
5922 case R_PPC64_REL64:
5923 case R_PPC64_ADDR32:
5924 case R_PPC64_UADDR16:
5925 case R_PPC64_UADDR32:
5926 case R_PPC64_UADDR64:
5927 case R_PPC64_TOC:
5928 if (h != NULL && !bfd_link_pic (info))
5929 /* We may need a copy reloc. */
5930 h->non_got_ref = 1;
5931
5932 /* Don't propagate .opd relocs. */
5933 if (NO_OPD_RELOCS && is_opd)
5934 break;
5935
5936 /* If we are creating a shared library, and this is a reloc
5937 against a global symbol, or a non PC relative reloc
5938 against a local symbol, then we need to copy the reloc
5939 into the shared library. However, if we are linking with
5940 -Bsymbolic, we do not need to copy a reloc against a
5941 global symbol which is defined in an object we are
5942 including in the link (i.e., DEF_REGULAR is set). At
5943 this point we have not seen all the input files, so it is
5944 possible that DEF_REGULAR is not set now but will be set
5945 later (it is never cleared). In case of a weak definition,
5946 DEF_REGULAR may be cleared later by a strong definition in
5947 a shared library. We account for that possibility below by
5948 storing information in the dyn_relocs field of the hash
5949 table entry. A similar situation occurs when creating
5950 shared libraries and symbol visibility changes render the
5951 symbol local.
5952
5953 If on the other hand, we are creating an executable, we
5954 may need to keep relocations for symbols satisfied by a
5955 dynamic library if we manage to avoid copy relocs for the
5956 symbol. */
5957 dodyn:
5958 if ((bfd_link_pic (info)
5959 && (must_be_dyn_reloc (info, r_type)
5960 || (h != NULL
5961 && (!SYMBOLIC_BIND (info, h)
5962 || h->root.type == bfd_link_hash_defweak
5963 || !h->def_regular))))
5964 || (ELIMINATE_COPY_RELOCS
5965 && !bfd_link_pic (info)
5966 && h != NULL
5967 && (h->root.type == bfd_link_hash_defweak
5968 || !h->def_regular))
5969 || (!bfd_link_pic (info)
5970 && ifunc != NULL))
5971 {
5972 /* We must copy these reloc types into the output file.
5973 Create a reloc section in dynobj and make room for
5974 this reloc. */
5975 if (sreloc == NULL)
5976 {
5977 sreloc = _bfd_elf_make_dynamic_reloc_section
5978 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5979
5980 if (sreloc == NULL)
5981 return FALSE;
5982 }
5983
5984 /* If this is a global symbol, we count the number of
5985 relocations we need for this symbol. */
5986 if (h != NULL)
5987 {
5988 struct elf_dyn_relocs *p;
5989 struct elf_dyn_relocs **head;
5990
5991 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5992 p = *head;
5993 if (p == NULL || p->sec != sec)
5994 {
5995 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5996 if (p == NULL)
5997 return FALSE;
5998 p->next = *head;
5999 *head = p;
6000 p->sec = sec;
6001 p->count = 0;
6002 p->pc_count = 0;
6003 }
6004 p->count += 1;
6005 if (!must_be_dyn_reloc (info, r_type))
6006 p->pc_count += 1;
6007 }
6008 else
6009 {
6010 /* Track dynamic relocs needed for local syms too.
6011 We really need local syms available to do this
6012 easily. Oh well. */
6013 struct ppc_dyn_relocs *p;
6014 struct ppc_dyn_relocs **head;
6015 bfd_boolean is_ifunc;
6016 asection *s;
6017 void *vpp;
6018 Elf_Internal_Sym *isym;
6019
6020 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6021 abfd, r_symndx);
6022 if (isym == NULL)
6023 return FALSE;
6024
6025 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6026 if (s == NULL)
6027 s = sec;
6028
6029 vpp = &elf_section_data (s)->local_dynrel;
6030 head = (struct ppc_dyn_relocs **) vpp;
6031 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
6032 p = *head;
6033 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
6034 p = p->next;
6035 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
6036 {
6037 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
6038 if (p == NULL)
6039 return FALSE;
6040 p->next = *head;
6041 *head = p;
6042 p->sec = sec;
6043 p->ifunc = is_ifunc;
6044 p->count = 0;
6045 }
6046 p->count += 1;
6047 }
6048 }
6049 break;
6050
6051 default:
6052 break;
6053 }
6054 }
6055
6056 return TRUE;
6057 }
6058
6059 /* Merge backend specific data from an object file to the output
6060 object file when linking. */
6061
6062 static bfd_boolean
6063 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6064 {
6065 bfd *obfd = info->output_bfd;
6066 unsigned long iflags, oflags;
6067
6068 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6069 return TRUE;
6070
6071 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6072 return TRUE;
6073
6074 if (!_bfd_generic_verify_endian_match (ibfd, info))
6075 return FALSE;
6076
6077 iflags = elf_elfheader (ibfd)->e_flags;
6078 oflags = elf_elfheader (obfd)->e_flags;
6079
6080 if (iflags & ~EF_PPC64_ABI)
6081 {
6082 _bfd_error_handler
6083 /* xgettext:c-format */
6084 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6085 bfd_set_error (bfd_error_bad_value);
6086 return FALSE;
6087 }
6088 else if (iflags != oflags && iflags != 0)
6089 {
6090 _bfd_error_handler
6091 /* xgettext:c-format */
6092 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6093 ibfd, iflags, oflags);
6094 bfd_set_error (bfd_error_bad_value);
6095 return FALSE;
6096 }
6097
6098 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6099
6100 /* Merge Tag_compatibility attributes and any common GNU ones. */
6101 _bfd_elf_merge_object_attributes (ibfd, info);
6102
6103 return TRUE;
6104 }
6105
6106 static bfd_boolean
6107 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6108 {
6109 /* Print normal ELF private data. */
6110 _bfd_elf_print_private_bfd_data (abfd, ptr);
6111
6112 if (elf_elfheader (abfd)->e_flags != 0)
6113 {
6114 FILE *file = ptr;
6115
6116 fprintf (file, _("private flags = 0x%lx:"),
6117 elf_elfheader (abfd)->e_flags);
6118
6119 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6120 fprintf (file, _(" [abiv%ld]"),
6121 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6122 fputc ('\n', file);
6123 }
6124
6125 return TRUE;
6126 }
6127
6128 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6129 of the code entry point, and its section, which must be in the same
6130 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6131
6132 static bfd_vma
6133 opd_entry_value (asection *opd_sec,
6134 bfd_vma offset,
6135 asection **code_sec,
6136 bfd_vma *code_off,
6137 bfd_boolean in_code_sec)
6138 {
6139 bfd *opd_bfd = opd_sec->owner;
6140 Elf_Internal_Rela *relocs;
6141 Elf_Internal_Rela *lo, *hi, *look;
6142 bfd_vma val;
6143
6144 /* No relocs implies we are linking a --just-symbols object, or looking
6145 at a final linked executable with addr2line or somesuch. */
6146 if (opd_sec->reloc_count == 0)
6147 {
6148 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6149
6150 if (contents == NULL)
6151 {
6152 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6153 return (bfd_vma) -1;
6154 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6155 }
6156
6157 /* PR 17512: file: 64b9dfbb. */
6158 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6159 return (bfd_vma) -1;
6160
6161 val = bfd_get_64 (opd_bfd, contents + offset);
6162 if (code_sec != NULL)
6163 {
6164 asection *sec, *likely = NULL;
6165
6166 if (in_code_sec)
6167 {
6168 sec = *code_sec;
6169 if (sec->vma <= val
6170 && val < sec->vma + sec->size)
6171 likely = sec;
6172 else
6173 val = -1;
6174 }
6175 else
6176 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6177 if (sec->vma <= val
6178 && (sec->flags & SEC_LOAD) != 0
6179 && (sec->flags & SEC_ALLOC) != 0)
6180 likely = sec;
6181 if (likely != NULL)
6182 {
6183 *code_sec = likely;
6184 if (code_off != NULL)
6185 *code_off = val - likely->vma;
6186 }
6187 }
6188 return val;
6189 }
6190
6191 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6192
6193 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6194 if (relocs == NULL)
6195 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6196 /* PR 17512: file: df8e1fd6. */
6197 if (relocs == NULL)
6198 return (bfd_vma) -1;
6199
6200 /* Go find the opd reloc at the sym address. */
6201 lo = relocs;
6202 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6203 val = (bfd_vma) -1;
6204 while (lo < hi)
6205 {
6206 look = lo + (hi - lo) / 2;
6207 if (look->r_offset < offset)
6208 lo = look + 1;
6209 else if (look->r_offset > offset)
6210 hi = look;
6211 else
6212 {
6213 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6214
6215 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6216 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6217 {
6218 unsigned long symndx = ELF64_R_SYM (look->r_info);
6219 asection *sec = NULL;
6220
6221 if (symndx >= symtab_hdr->sh_info
6222 && elf_sym_hashes (opd_bfd) != NULL)
6223 {
6224 struct elf_link_hash_entry **sym_hashes;
6225 struct elf_link_hash_entry *rh;
6226
6227 sym_hashes = elf_sym_hashes (opd_bfd);
6228 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6229 if (rh != NULL)
6230 {
6231 rh = elf_follow_link (rh);
6232 if (rh->root.type != bfd_link_hash_defined
6233 && rh->root.type != bfd_link_hash_defweak)
6234 break;
6235 if (rh->root.u.def.section->owner == opd_bfd)
6236 {
6237 val = rh->root.u.def.value;
6238 sec = rh->root.u.def.section;
6239 }
6240 }
6241 }
6242
6243 if (sec == NULL)
6244 {
6245 Elf_Internal_Sym *sym;
6246
6247 if (symndx < symtab_hdr->sh_info)
6248 {
6249 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6250 if (sym == NULL)
6251 {
6252 size_t symcnt = symtab_hdr->sh_info;
6253 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6254 symcnt, 0,
6255 NULL, NULL, NULL);
6256 if (sym == NULL)
6257 break;
6258 symtab_hdr->contents = (bfd_byte *) sym;
6259 }
6260 sym += symndx;
6261 }
6262 else
6263 {
6264 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6265 1, symndx,
6266 NULL, NULL, NULL);
6267 if (sym == NULL)
6268 break;
6269 }
6270 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6271 if (sec == NULL)
6272 break;
6273 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6274 val = sym->st_value;
6275 }
6276
6277 val += look->r_addend;
6278 if (code_off != NULL)
6279 *code_off = val;
6280 if (code_sec != NULL)
6281 {
6282 if (in_code_sec && *code_sec != sec)
6283 return -1;
6284 else
6285 *code_sec = sec;
6286 }
6287 if (sec->output_section != NULL)
6288 val += sec->output_section->vma + sec->output_offset;
6289 }
6290 break;
6291 }
6292 }
6293
6294 return val;
6295 }
6296
6297 /* If the ELF symbol SYM might be a function in SEC, return the
6298 function size and set *CODE_OFF to the function's entry point,
6299 otherwise return zero. */
6300
6301 static bfd_size_type
6302 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6303 bfd_vma *code_off)
6304 {
6305 bfd_size_type size;
6306
6307 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6308 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6309 return 0;
6310
6311 size = 0;
6312 if (!(sym->flags & BSF_SYNTHETIC))
6313 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6314
6315 if (strcmp (sym->section->name, ".opd") == 0)
6316 {
6317 struct _opd_sec_data *opd = get_opd_info (sym->section);
6318 bfd_vma symval = sym->value;
6319
6320 if (opd != NULL
6321 && opd->adjust != NULL
6322 && elf_section_data (sym->section)->relocs != NULL)
6323 {
6324 /* opd_entry_value will use cached relocs that have been
6325 adjusted, but with raw symbols. That means both local
6326 and global symbols need adjusting. */
6327 long adjust = opd->adjust[OPD_NDX (symval)];
6328 if (adjust == -1)
6329 return 0;
6330 symval += adjust;
6331 }
6332
6333 if (opd_entry_value (sym->section, symval,
6334 &sec, code_off, TRUE) == (bfd_vma) -1)
6335 return 0;
6336 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6337 symbol. This size has nothing to do with the code size of the
6338 function, which is what we're supposed to return, but the
6339 code size isn't available without looking up the dot-sym.
6340 However, doing that would be a waste of time particularly
6341 since elf_find_function will look at the dot-sym anyway.
6342 Now, elf_find_function will keep the largest size of any
6343 function sym found at the code address of interest, so return
6344 1 here to avoid it incorrectly caching a larger function size
6345 for a small function. This does mean we return the wrong
6346 size for a new-ABI function of size 24, but all that does is
6347 disable caching for such functions. */
6348 if (size == 24)
6349 size = 1;
6350 }
6351 else
6352 {
6353 if (sym->section != sec)
6354 return 0;
6355 *code_off = sym->value;
6356 }
6357 if (size == 0)
6358 size = 1;
6359 return size;
6360 }
6361
6362 /* Return true if symbol is a strong function defined in an ELFv2
6363 object with st_other localentry bits of zero, ie. its local entry
6364 point coincides with its global entry point. */
6365
6366 static bfd_boolean
6367 is_elfv2_localentry0 (struct elf_link_hash_entry *h)
6368 {
6369 return (h != NULL
6370 && h->type == STT_FUNC
6371 && h->root.type == bfd_link_hash_defined
6372 && (STO_PPC64_LOCAL_MASK & h->other) == 0
6373 && !((struct ppc_link_hash_entry *) h)->non_zero_localentry
6374 && is_ppc64_elf (h->root.u.def.section->owner)
6375 && abiversion (h->root.u.def.section->owner) >= 2);
6376 }
6377
6378 /* Return true if symbol is defined in a regular object file. */
6379
6380 static bfd_boolean
6381 is_static_defined (struct elf_link_hash_entry *h)
6382 {
6383 return ((h->root.type == bfd_link_hash_defined
6384 || h->root.type == bfd_link_hash_defweak)
6385 && h->root.u.def.section != NULL
6386 && h->root.u.def.section->output_section != NULL);
6387 }
6388
6389 /* If FDH is a function descriptor symbol, return the associated code
6390 entry symbol if it is defined. Return NULL otherwise. */
6391
6392 static struct ppc_link_hash_entry *
6393 defined_code_entry (struct ppc_link_hash_entry *fdh)
6394 {
6395 if (fdh->is_func_descriptor)
6396 {
6397 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6398 if (fh->elf.root.type == bfd_link_hash_defined
6399 || fh->elf.root.type == bfd_link_hash_defweak)
6400 return fh;
6401 }
6402 return NULL;
6403 }
6404
6405 /* If FH is a function code entry symbol, return the associated
6406 function descriptor symbol if it is defined. Return NULL otherwise. */
6407
6408 static struct ppc_link_hash_entry *
6409 defined_func_desc (struct ppc_link_hash_entry *fh)
6410 {
6411 if (fh->oh != NULL
6412 && fh->oh->is_func_descriptor)
6413 {
6414 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6415 if (fdh->elf.root.type == bfd_link_hash_defined
6416 || fdh->elf.root.type == bfd_link_hash_defweak)
6417 return fdh;
6418 }
6419 return NULL;
6420 }
6421
6422 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6423
6424 /* Garbage collect sections, after first dealing with dot-symbols. */
6425
6426 static bfd_boolean
6427 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6428 {
6429 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6430
6431 if (htab != NULL && htab->need_func_desc_adj)
6432 {
6433 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6434 htab->need_func_desc_adj = 0;
6435 }
6436 return bfd_elf_gc_sections (abfd, info);
6437 }
6438
6439 /* Mark all our entry sym sections, both opd and code section. */
6440
6441 static void
6442 ppc64_elf_gc_keep (struct bfd_link_info *info)
6443 {
6444 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6445 struct bfd_sym_chain *sym;
6446
6447 if (htab == NULL)
6448 return;
6449
6450 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6451 {
6452 struct ppc_link_hash_entry *eh, *fh;
6453 asection *sec;
6454
6455 eh = (struct ppc_link_hash_entry *)
6456 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6457 if (eh == NULL)
6458 continue;
6459 if (eh->elf.root.type != bfd_link_hash_defined
6460 && eh->elf.root.type != bfd_link_hash_defweak)
6461 continue;
6462
6463 fh = defined_code_entry (eh);
6464 if (fh != NULL)
6465 {
6466 sec = fh->elf.root.u.def.section;
6467 sec->flags |= SEC_KEEP;
6468 }
6469 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6470 && opd_entry_value (eh->elf.root.u.def.section,
6471 eh->elf.root.u.def.value,
6472 &sec, NULL, FALSE) != (bfd_vma) -1)
6473 sec->flags |= SEC_KEEP;
6474
6475 sec = eh->elf.root.u.def.section;
6476 sec->flags |= SEC_KEEP;
6477 }
6478 }
6479
6480 /* Mark sections containing dynamically referenced symbols. When
6481 building shared libraries, we must assume that any visible symbol is
6482 referenced. */
6483
6484 static bfd_boolean
6485 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6486 {
6487 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6488 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6489 struct ppc_link_hash_entry *fdh;
6490 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6491
6492 /* Dynamic linking info is on the func descriptor sym. */
6493 fdh = defined_func_desc (eh);
6494 if (fdh != NULL)
6495 eh = fdh;
6496
6497 if ((eh->elf.root.type == bfd_link_hash_defined
6498 || eh->elf.root.type == bfd_link_hash_defweak)
6499 && (eh->elf.ref_dynamic
6500 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6501 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6502 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6503 && (!bfd_link_executable (info)
6504 || info->gc_keep_exported
6505 || info->export_dynamic
6506 || (eh->elf.dynamic
6507 && d != NULL
6508 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6509 && (eh->elf.versioned >= versioned
6510 || !bfd_hide_sym_by_version (info->version_info,
6511 eh->elf.root.root.string)))))
6512 {
6513 asection *code_sec;
6514 struct ppc_link_hash_entry *fh;
6515
6516 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6517
6518 /* Function descriptor syms cause the associated
6519 function code sym section to be marked. */
6520 fh = defined_code_entry (eh);
6521 if (fh != NULL)
6522 {
6523 code_sec = fh->elf.root.u.def.section;
6524 code_sec->flags |= SEC_KEEP;
6525 }
6526 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6527 && opd_entry_value (eh->elf.root.u.def.section,
6528 eh->elf.root.u.def.value,
6529 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6530 code_sec->flags |= SEC_KEEP;
6531 }
6532
6533 return TRUE;
6534 }
6535
6536 /* Return the section that should be marked against GC for a given
6537 relocation. */
6538
6539 static asection *
6540 ppc64_elf_gc_mark_hook (asection *sec,
6541 struct bfd_link_info *info,
6542 Elf_Internal_Rela *rel,
6543 struct elf_link_hash_entry *h,
6544 Elf_Internal_Sym *sym)
6545 {
6546 asection *rsec;
6547
6548 /* Syms return NULL if we're marking .opd, so we avoid marking all
6549 function sections, as all functions are referenced in .opd. */
6550 rsec = NULL;
6551 if (get_opd_info (sec) != NULL)
6552 return rsec;
6553
6554 if (h != NULL)
6555 {
6556 enum elf_ppc64_reloc_type r_type;
6557 struct ppc_link_hash_entry *eh, *fh, *fdh;
6558
6559 r_type = ELF64_R_TYPE (rel->r_info);
6560 switch (r_type)
6561 {
6562 case R_PPC64_GNU_VTINHERIT:
6563 case R_PPC64_GNU_VTENTRY:
6564 break;
6565
6566 default:
6567 switch (h->root.type)
6568 {
6569 case bfd_link_hash_defined:
6570 case bfd_link_hash_defweak:
6571 eh = (struct ppc_link_hash_entry *) h;
6572 fdh = defined_func_desc (eh);
6573 if (fdh != NULL)
6574 {
6575 /* -mcall-aixdesc code references the dot-symbol on
6576 a call reloc. Mark the function descriptor too
6577 against garbage collection. */
6578 fdh->elf.mark = 1;
6579 if (fdh->elf.u.weakdef != NULL)
6580 fdh->elf.u.weakdef->mark = 1;
6581 eh = fdh;
6582 }
6583
6584 /* Function descriptor syms cause the associated
6585 function code sym section to be marked. */
6586 fh = defined_code_entry (eh);
6587 if (fh != NULL)
6588 {
6589 /* They also mark their opd section. */
6590 eh->elf.root.u.def.section->gc_mark = 1;
6591
6592 rsec = fh->elf.root.u.def.section;
6593 }
6594 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6595 && opd_entry_value (eh->elf.root.u.def.section,
6596 eh->elf.root.u.def.value,
6597 &rsec, NULL, FALSE) != (bfd_vma) -1)
6598 eh->elf.root.u.def.section->gc_mark = 1;
6599 else
6600 rsec = h->root.u.def.section;
6601 break;
6602
6603 case bfd_link_hash_common:
6604 rsec = h->root.u.c.p->section;
6605 break;
6606
6607 default:
6608 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6609 }
6610 }
6611 }
6612 else
6613 {
6614 struct _opd_sec_data *opd;
6615
6616 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6617 opd = get_opd_info (rsec);
6618 if (opd != NULL && opd->func_sec != NULL)
6619 {
6620 rsec->gc_mark = 1;
6621
6622 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6623 }
6624 }
6625
6626 return rsec;
6627 }
6628
6629 /* The maximum size of .sfpr. */
6630 #define SFPR_MAX (218*4)
6631
6632 struct sfpr_def_parms
6633 {
6634 const char name[12];
6635 unsigned char lo, hi;
6636 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6637 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6638 };
6639
6640 /* Auto-generate _save*, _rest* functions in .sfpr.
6641 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6642 instead. */
6643
6644 static bfd_boolean
6645 sfpr_define (struct bfd_link_info *info,
6646 const struct sfpr_def_parms *parm,
6647 asection *stub_sec)
6648 {
6649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6650 unsigned int i;
6651 size_t len = strlen (parm->name);
6652 bfd_boolean writing = FALSE;
6653 char sym[16];
6654
6655 if (htab == NULL)
6656 return FALSE;
6657
6658 memcpy (sym, parm->name, len);
6659 sym[len + 2] = 0;
6660
6661 for (i = parm->lo; i <= parm->hi; i++)
6662 {
6663 struct ppc_link_hash_entry *h;
6664
6665 sym[len + 0] = i / 10 + '0';
6666 sym[len + 1] = i % 10 + '0';
6667 h = (struct ppc_link_hash_entry *)
6668 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6669 if (stub_sec != NULL)
6670 {
6671 if (h != NULL
6672 && h->elf.root.type == bfd_link_hash_defined
6673 && h->elf.root.u.def.section == htab->sfpr)
6674 {
6675 struct elf_link_hash_entry *s;
6676 char buf[32];
6677 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6678 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6679 if (s == NULL)
6680 return FALSE;
6681 if (s->root.type == bfd_link_hash_new
6682 || (s->root.type = bfd_link_hash_defined
6683 && s->root.u.def.section == stub_sec))
6684 {
6685 s->root.type = bfd_link_hash_defined;
6686 s->root.u.def.section = stub_sec;
6687 s->root.u.def.value = (stub_sec->size
6688 + h->elf.root.u.def.value);
6689 s->ref_regular = 1;
6690 s->def_regular = 1;
6691 s->ref_regular_nonweak = 1;
6692 s->forced_local = 1;
6693 s->non_elf = 0;
6694 s->root.linker_def = 1;
6695 }
6696 }
6697 continue;
6698 }
6699 if (h != NULL)
6700 {
6701 h->save_res = 1;
6702 if (!h->elf.def_regular)
6703 {
6704 h->elf.root.type = bfd_link_hash_defined;
6705 h->elf.root.u.def.section = htab->sfpr;
6706 h->elf.root.u.def.value = htab->sfpr->size;
6707 h->elf.type = STT_FUNC;
6708 h->elf.def_regular = 1;
6709 h->elf.non_elf = 0;
6710 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6711 writing = TRUE;
6712 if (htab->sfpr->contents == NULL)
6713 {
6714 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6715 if (htab->sfpr->contents == NULL)
6716 return FALSE;
6717 }
6718 }
6719 }
6720 if (writing)
6721 {
6722 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6723 if (i != parm->hi)
6724 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6725 else
6726 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6727 htab->sfpr->size = p - htab->sfpr->contents;
6728 }
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 static bfd_byte *
6735 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6736 {
6737 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6738 return p + 4;
6739 }
6740
6741 static bfd_byte *
6742 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6743 {
6744 p = savegpr0 (abfd, p, r);
6745 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6746 p = p + 4;
6747 bfd_put_32 (abfd, BLR, p);
6748 return p + 4;
6749 }
6750
6751 static bfd_byte *
6752 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6753 {
6754 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6755 return p + 4;
6756 }
6757
6758 static bfd_byte *
6759 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6760 {
6761 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6762 p = p + 4;
6763 p = restgpr0 (abfd, p, r);
6764 bfd_put_32 (abfd, MTLR_R0, p);
6765 p = p + 4;
6766 if (r == 29)
6767 {
6768 p = restgpr0 (abfd, p, 30);
6769 p = restgpr0 (abfd, p, 31);
6770 }
6771 bfd_put_32 (abfd, BLR, p);
6772 return p + 4;
6773 }
6774
6775 static bfd_byte *
6776 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6777 {
6778 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6779 return p + 4;
6780 }
6781
6782 static bfd_byte *
6783 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6784 {
6785 p = savegpr1 (abfd, p, r);
6786 bfd_put_32 (abfd, BLR, p);
6787 return p + 4;
6788 }
6789
6790 static bfd_byte *
6791 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6792 {
6793 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6794 return p + 4;
6795 }
6796
6797 static bfd_byte *
6798 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6799 {
6800 p = restgpr1 (abfd, p, r);
6801 bfd_put_32 (abfd, BLR, p);
6802 return p + 4;
6803 }
6804
6805 static bfd_byte *
6806 savefpr (bfd *abfd, bfd_byte *p, int r)
6807 {
6808 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6809 return p + 4;
6810 }
6811
6812 static bfd_byte *
6813 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6814 {
6815 p = savefpr (abfd, p, r);
6816 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6817 p = p + 4;
6818 bfd_put_32 (abfd, BLR, p);
6819 return p + 4;
6820 }
6821
6822 static bfd_byte *
6823 restfpr (bfd *abfd, bfd_byte *p, int r)
6824 {
6825 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6826 return p + 4;
6827 }
6828
6829 static bfd_byte *
6830 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6831 {
6832 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6833 p = p + 4;
6834 p = restfpr (abfd, p, r);
6835 bfd_put_32 (abfd, MTLR_R0, p);
6836 p = p + 4;
6837 if (r == 29)
6838 {
6839 p = restfpr (abfd, p, 30);
6840 p = restfpr (abfd, p, 31);
6841 }
6842 bfd_put_32 (abfd, BLR, p);
6843 return p + 4;
6844 }
6845
6846 static bfd_byte *
6847 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6848 {
6849 p = savefpr (abfd, p, r);
6850 bfd_put_32 (abfd, BLR, p);
6851 return p + 4;
6852 }
6853
6854 static bfd_byte *
6855 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6856 {
6857 p = restfpr (abfd, p, r);
6858 bfd_put_32 (abfd, BLR, p);
6859 return p + 4;
6860 }
6861
6862 static bfd_byte *
6863 savevr (bfd *abfd, bfd_byte *p, int r)
6864 {
6865 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6866 p = p + 4;
6867 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6868 return p + 4;
6869 }
6870
6871 static bfd_byte *
6872 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6873 {
6874 p = savevr (abfd, p, r);
6875 bfd_put_32 (abfd, BLR, p);
6876 return p + 4;
6877 }
6878
6879 static bfd_byte *
6880 restvr (bfd *abfd, bfd_byte *p, int r)
6881 {
6882 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6883 p = p + 4;
6884 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6885 return p + 4;
6886 }
6887
6888 static bfd_byte *
6889 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6890 {
6891 p = restvr (abfd, p, r);
6892 bfd_put_32 (abfd, BLR, p);
6893 return p + 4;
6894 }
6895
6896 /* Called via elf_link_hash_traverse to transfer dynamic linking
6897 information on function code symbol entries to their corresponding
6898 function descriptor symbol entries. */
6899
6900 static bfd_boolean
6901 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6902 {
6903 struct bfd_link_info *info;
6904 struct ppc_link_hash_table *htab;
6905 struct ppc_link_hash_entry *fh;
6906 struct ppc_link_hash_entry *fdh;
6907 bfd_boolean force_local;
6908
6909 fh = (struct ppc_link_hash_entry *) h;
6910 if (fh->elf.root.type == bfd_link_hash_indirect)
6911 return TRUE;
6912
6913 if (!fh->is_func)
6914 return TRUE;
6915
6916 if (fh->elf.root.root.string[0] != '.'
6917 || fh->elf.root.root.string[1] == '\0')
6918 return TRUE;
6919
6920 info = inf;
6921 htab = ppc_hash_table (info);
6922 if (htab == NULL)
6923 return FALSE;
6924
6925 /* Find the corresponding function descriptor symbol. */
6926 fdh = lookup_fdh (fh, htab);
6927
6928 /* Resolve undefined references to dot-symbols as the value
6929 in the function descriptor, if we have one in a regular object.
6930 This is to satisfy cases like ".quad .foo". Calls to functions
6931 in dynamic objects are handled elsewhere. */
6932 if ((fh->elf.root.type == bfd_link_hash_undefined
6933 || fh->elf.root.type == bfd_link_hash_undefweak)
6934 && (fdh->elf.root.type == bfd_link_hash_defined
6935 || fdh->elf.root.type == bfd_link_hash_defweak)
6936 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6937 && opd_entry_value (fdh->elf.root.u.def.section,
6938 fdh->elf.root.u.def.value,
6939 &fh->elf.root.u.def.section,
6940 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6941 {
6942 fh->elf.root.type = fdh->elf.root.type;
6943 fh->elf.forced_local = 1;
6944 fh->elf.def_regular = fdh->elf.def_regular;
6945 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6946 }
6947
6948 if (!fh->elf.dynamic)
6949 {
6950 struct plt_entry *ent;
6951
6952 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6953 if (ent->plt.refcount > 0)
6954 break;
6955 if (ent == NULL)
6956 return TRUE;
6957 }
6958
6959 /* Create a descriptor as undefined if necessary. */
6960 if (fdh == NULL
6961 && !bfd_link_executable (info)
6962 && (fh->elf.root.type == bfd_link_hash_undefined
6963 || fh->elf.root.type == bfd_link_hash_undefweak))
6964 {
6965 fdh = make_fdh (info, fh);
6966 if (fdh == NULL)
6967 return FALSE;
6968 }
6969
6970 /* We can't support overriding of symbols on a fake descriptor. */
6971 if (fdh != NULL
6972 && fdh->fake
6973 && (fh->elf.root.type == bfd_link_hash_defined
6974 || fh->elf.root.type == bfd_link_hash_defweak))
6975 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6976
6977 /* Transfer dynamic linking information to the function descriptor. */
6978 if (fdh != NULL)
6979 {
6980 fdh->elf.ref_regular |= fh->elf.ref_regular;
6981 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6982 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6983 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6984 fdh->elf.dynamic |= fh->elf.dynamic;
6985 fdh->elf.needs_plt |= (fh->elf.needs_plt
6986 || fh->elf.type == STT_FUNC
6987 || fh->elf.type == STT_GNU_IFUNC);
6988 move_plt_plist (fh, fdh);
6989
6990 if (!fdh->elf.forced_local
6991 && fh->elf.dynindx != -1)
6992 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6993 return FALSE;
6994 }
6995
6996 /* Now that the info is on the function descriptor, clear the
6997 function code sym info. Any function code syms for which we
6998 don't have a definition in a regular file, we force local.
6999 This prevents a shared library from exporting syms that have
7000 been imported from another library. Function code syms that
7001 are really in the library we must leave global to prevent the
7002 linker dragging in a definition from a static library. */
7003 force_local = (!fh->elf.def_regular
7004 || fdh == NULL
7005 || !fdh->elf.def_regular
7006 || fdh->elf.forced_local);
7007 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7008
7009 return TRUE;
7010 }
7011
7012 static const struct sfpr_def_parms save_res_funcs[] =
7013 {
7014 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7015 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7016 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7017 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7018 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7019 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7020 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7021 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7022 { "._savef", 14, 31, savefpr, savefpr1_tail },
7023 { "._restf", 14, 31, restfpr, restfpr1_tail },
7024 { "_savevr_", 20, 31, savevr, savevr_tail },
7025 { "_restvr_", 20, 31, restvr, restvr_tail }
7026 };
7027
7028 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7029 this hook to a) provide some gcc support functions, and b) transfer
7030 dynamic linking information gathered so far on function code symbol
7031 entries, to their corresponding function descriptor symbol entries. */
7032
7033 static bfd_boolean
7034 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7035 struct bfd_link_info *info)
7036 {
7037 struct ppc_link_hash_table *htab;
7038
7039 htab = ppc_hash_table (info);
7040 if (htab == NULL)
7041 return FALSE;
7042
7043 /* Provide any missing _save* and _rest* functions. */
7044 if (htab->sfpr != NULL)
7045 {
7046 unsigned int i;
7047
7048 htab->sfpr->size = 0;
7049 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7050 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7051 return FALSE;
7052 if (htab->sfpr->size == 0)
7053 htab->sfpr->flags |= SEC_EXCLUDE;
7054 }
7055
7056 if (bfd_link_relocatable (info))
7057 return TRUE;
7058
7059 if (htab->elf.hgot != NULL)
7060 {
7061 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7062 /* Make .TOC. defined so as to prevent it being made dynamic.
7063 The wrong value here is fixed later in ppc64_elf_set_toc. */
7064 if (!htab->elf.hgot->def_regular
7065 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7066 {
7067 htab->elf.hgot->root.type = bfd_link_hash_defined;
7068 htab->elf.hgot->root.u.def.value = 0;
7069 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7070 htab->elf.hgot->def_regular = 1;
7071 htab->elf.hgot->root.linker_def = 1;
7072 }
7073 htab->elf.hgot->type = STT_OBJECT;
7074 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7075 | STV_HIDDEN);
7076 }
7077
7078 if (htab->need_func_desc_adj)
7079 {
7080 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7081 htab->need_func_desc_adj = 0;
7082 }
7083
7084 return TRUE;
7085 }
7086
7087 /* Find dynamic relocs for H that apply to read-only sections. */
7088
7089 static asection *
7090 readonly_dynrelocs (struct elf_link_hash_entry *h)
7091 {
7092 struct ppc_link_hash_entry *eh;
7093 struct elf_dyn_relocs *p;
7094
7095 eh = (struct ppc_link_hash_entry *) h;
7096 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7097 {
7098 asection *s = p->sec->output_section;
7099
7100 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7101 return p->sec;
7102 }
7103 return NULL;
7104 }
7105
7106 /* Return true if we have dynamic relocs against H or any of its weak
7107 aliases, that apply to read-only sections. */
7108
7109 static bfd_boolean
7110 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7111 {
7112 struct ppc_link_hash_entry *eh;
7113
7114 eh = (struct ppc_link_hash_entry *) h;
7115 do
7116 {
7117 if (readonly_dynrelocs (&eh->elf))
7118 return TRUE;
7119 eh = eh->weakref;
7120 } while (eh != NULL && &eh->elf != h);
7121
7122 return FALSE;
7123 }
7124
7125 /* Return whether EH has pc-relative dynamic relocs. */
7126
7127 static bfd_boolean
7128 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7129 {
7130 struct elf_dyn_relocs *p;
7131
7132 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7133 if (p->pc_count != 0)
7134 return TRUE;
7135 return FALSE;
7136 }
7137
7138 /* Return true if a global entry stub will be created for H. Valid
7139 for ELFv2 before plt entries have been allocated. */
7140
7141 static bfd_boolean
7142 global_entry_stub (struct elf_link_hash_entry *h)
7143 {
7144 struct plt_entry *pent;
7145
7146 if (!h->pointer_equality_needed
7147 || h->def_regular)
7148 return FALSE;
7149
7150 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7151 if (pent->plt.refcount > 0
7152 && pent->addend == 0)
7153 return TRUE;
7154
7155 return FALSE;
7156 }
7157
7158 /* Adjust a symbol defined by a dynamic object and referenced by a
7159 regular object. The current definition is in some section of the
7160 dynamic object, but we're not including those sections. We have to
7161 change the definition to something the rest of the link can
7162 understand. */
7163
7164 static bfd_boolean
7165 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7166 struct elf_link_hash_entry *h)
7167 {
7168 struct ppc_link_hash_table *htab;
7169 asection *s, *srel;
7170
7171 htab = ppc_hash_table (info);
7172 if (htab == NULL)
7173 return FALSE;
7174
7175 /* Deal with function syms. */
7176 if (h->type == STT_FUNC
7177 || h->type == STT_GNU_IFUNC
7178 || h->needs_plt)
7179 {
7180 /* Clear procedure linkage table information for any symbol that
7181 won't need a .plt entry. */
7182 struct plt_entry *ent;
7183 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7184 if (ent->plt.refcount > 0)
7185 break;
7186 if (ent == NULL
7187 || (h->type != STT_GNU_IFUNC
7188 && (SYMBOL_CALLS_LOCAL (info, h)
7189 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
7190 || ((struct ppc_link_hash_entry *) h)->save_res)
7191 {
7192 h->plt.plist = NULL;
7193 h->needs_plt = 0;
7194 h->pointer_equality_needed = 0;
7195 /* After adjust_dynamic_symbol, non_got_ref set in the
7196 non-pic case means that dyn_relocs for this symbol should
7197 be discarded. We either want the symbol to remain
7198 undefined, or we have a local definition of some sort.
7199 The "local definition" for non-function symbols may be
7200 due to creating a local definition in .dynbss, and for
7201 ELFv2 function symbols, defining the symbol on the PLT
7202 call stub code. Set non_got_ref here to ensure undef
7203 weaks stay undefined. */
7204 h->non_got_ref = 1;
7205 }
7206 else if (abiversion (info->output_bfd) >= 2)
7207 {
7208 /* Taking a function's address in a read/write section
7209 doesn't require us to define the function symbol in the
7210 executable on a global entry stub. A dynamic reloc can
7211 be used instead. The reason we prefer a few more dynamic
7212 relocs is that calling via a global entry stub costs a
7213 few more instructions, and pointer_equality_needed causes
7214 extra work in ld.so when resolving these symbols. */
7215 if (global_entry_stub (h)
7216 && !alias_readonly_dynrelocs (h))
7217 {
7218 h->pointer_equality_needed = 0;
7219 /* Say that we do want dynamic relocs. */
7220 h->non_got_ref = 0;
7221 /* If we haven't seen a branch reloc then we don't need
7222 a plt entry. */
7223 if (!h->needs_plt)
7224 h->plt.plist = NULL;
7225 }
7226
7227 /* ELFv2 function symbols can't have copy relocs. */
7228 return TRUE;
7229 }
7230 else if (!h->needs_plt
7231 && !alias_readonly_dynrelocs (h))
7232 {
7233 /* If we haven't seen a branch reloc then we don't need a
7234 plt entry. */
7235 h->plt.plist = NULL;
7236 h->pointer_equality_needed = 0;
7237 h->non_got_ref = 0;
7238 return TRUE;
7239 }
7240 }
7241 else
7242 h->plt.plist = NULL;
7243
7244 /* If this is a weak symbol, and there is a real definition, the
7245 processor independent code will have arranged for us to see the
7246 real definition first, and we can just use the same value. */
7247 if (h->u.weakdef != NULL)
7248 {
7249 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7250 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7251 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7252 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7253 if (ELIMINATE_COPY_RELOCS)
7254 h->non_got_ref = h->u.weakdef->non_got_ref;
7255 return TRUE;
7256 }
7257
7258 /* If we are creating a shared library, we must presume that the
7259 only references to the symbol are via the global offset table.
7260 For such cases we need not do anything here; the relocations will
7261 be handled correctly by relocate_section. */
7262 if (bfd_link_pic (info))
7263 return TRUE;
7264
7265 /* If there are no references to this symbol that do not use the
7266 GOT, we don't need to generate a copy reloc. */
7267 if (!h->non_got_ref)
7268 return TRUE;
7269
7270 /* Don't generate a copy reloc for symbols defined in the executable. */
7271 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7272
7273 /* If -z nocopyreloc was given, don't generate them either. */
7274 || info->nocopyreloc
7275
7276 /* If we didn't find any dynamic relocs in read-only sections, then
7277 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7278 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7279
7280 /* Protected variables do not work with .dynbss. The copy in
7281 .dynbss won't be used by the shared library with the protected
7282 definition for the variable. Text relocations are preferable
7283 to an incorrect program. */
7284 || h->protected_def)
7285 {
7286 h->non_got_ref = 0;
7287 return TRUE;
7288 }
7289
7290 if (h->plt.plist != NULL)
7291 {
7292 /* We should never get here, but unfortunately there are versions
7293 of gcc out there that improperly (for this ABI) put initialized
7294 function pointers, vtable refs and suchlike in read-only
7295 sections. Allow them to proceed, but warn that this might
7296 break at runtime. */
7297 info->callbacks->einfo
7298 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7299 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7300 h->root.root.string);
7301 }
7302
7303 /* This is a reference to a symbol defined by a dynamic object which
7304 is not a function. */
7305
7306 /* We must allocate the symbol in our .dynbss section, which will
7307 become part of the .bss section of the executable. There will be
7308 an entry for this symbol in the .dynsym section. The dynamic
7309 object will contain position independent code, so all references
7310 from the dynamic object to this symbol will go through the global
7311 offset table. The dynamic linker will use the .dynsym entry to
7312 determine the address it must put in the global offset table, so
7313 both the dynamic object and the regular object will refer to the
7314 same memory location for the variable. */
7315
7316 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7317 to copy the initial value out of the dynamic object and into the
7318 runtime process image. We need to remember the offset into the
7319 .rela.bss section we are going to use. */
7320 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7321 {
7322 s = htab->elf.sdynrelro;
7323 srel = htab->elf.sreldynrelro;
7324 }
7325 else
7326 {
7327 s = htab->elf.sdynbss;
7328 srel = htab->elf.srelbss;
7329 }
7330 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7331 {
7332 srel->size += sizeof (Elf64_External_Rela);
7333 h->needs_copy = 1;
7334 }
7335
7336 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7337 }
7338
7339 /* If given a function descriptor symbol, hide both the function code
7340 sym and the descriptor. */
7341 static void
7342 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7343 struct elf_link_hash_entry *h,
7344 bfd_boolean force_local)
7345 {
7346 struct ppc_link_hash_entry *eh;
7347 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7348
7349 eh = (struct ppc_link_hash_entry *) h;
7350 if (eh->is_func_descriptor)
7351 {
7352 struct ppc_link_hash_entry *fh = eh->oh;
7353
7354 if (fh == NULL)
7355 {
7356 const char *p, *q;
7357 struct elf_link_hash_table *htab = elf_hash_table (info);
7358 char save;
7359
7360 /* We aren't supposed to use alloca in BFD because on
7361 systems which do not have alloca the version in libiberty
7362 calls xmalloc, which might cause the program to crash
7363 when it runs out of memory. This function doesn't have a
7364 return status, so there's no way to gracefully return an
7365 error. So cheat. We know that string[-1] can be safely
7366 accessed; It's either a string in an ELF string table,
7367 or allocated in an objalloc structure. */
7368
7369 p = eh->elf.root.root.string - 1;
7370 save = *p;
7371 *(char *) p = '.';
7372 fh = (struct ppc_link_hash_entry *)
7373 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7374 *(char *) p = save;
7375
7376 /* Unfortunately, if it so happens that the string we were
7377 looking for was allocated immediately before this string,
7378 then we overwrote the string terminator. That's the only
7379 reason the lookup should fail. */
7380 if (fh == NULL)
7381 {
7382 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7383 while (q >= eh->elf.root.root.string && *q == *p)
7384 --q, --p;
7385 if (q < eh->elf.root.root.string && *p == '.')
7386 fh = (struct ppc_link_hash_entry *)
7387 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7388 }
7389 if (fh != NULL)
7390 {
7391 eh->oh = fh;
7392 fh->oh = eh;
7393 }
7394 }
7395 if (fh != NULL)
7396 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7397 }
7398 }
7399
7400 static bfd_boolean
7401 get_sym_h (struct elf_link_hash_entry **hp,
7402 Elf_Internal_Sym **symp,
7403 asection **symsecp,
7404 unsigned char **tls_maskp,
7405 Elf_Internal_Sym **locsymsp,
7406 unsigned long r_symndx,
7407 bfd *ibfd)
7408 {
7409 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7410
7411 if (r_symndx >= symtab_hdr->sh_info)
7412 {
7413 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7414 struct elf_link_hash_entry *h;
7415
7416 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7417 h = elf_follow_link (h);
7418
7419 if (hp != NULL)
7420 *hp = h;
7421
7422 if (symp != NULL)
7423 *symp = NULL;
7424
7425 if (symsecp != NULL)
7426 {
7427 asection *symsec = NULL;
7428 if (h->root.type == bfd_link_hash_defined
7429 || h->root.type == bfd_link_hash_defweak)
7430 symsec = h->root.u.def.section;
7431 *symsecp = symsec;
7432 }
7433
7434 if (tls_maskp != NULL)
7435 {
7436 struct ppc_link_hash_entry *eh;
7437
7438 eh = (struct ppc_link_hash_entry *) h;
7439 *tls_maskp = &eh->tls_mask;
7440 }
7441 }
7442 else
7443 {
7444 Elf_Internal_Sym *sym;
7445 Elf_Internal_Sym *locsyms = *locsymsp;
7446
7447 if (locsyms == NULL)
7448 {
7449 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7450 if (locsyms == NULL)
7451 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7452 symtab_hdr->sh_info,
7453 0, NULL, NULL, NULL);
7454 if (locsyms == NULL)
7455 return FALSE;
7456 *locsymsp = locsyms;
7457 }
7458 sym = locsyms + r_symndx;
7459
7460 if (hp != NULL)
7461 *hp = NULL;
7462
7463 if (symp != NULL)
7464 *symp = sym;
7465
7466 if (symsecp != NULL)
7467 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7468
7469 if (tls_maskp != NULL)
7470 {
7471 struct got_entry **lgot_ents;
7472 unsigned char *tls_mask;
7473
7474 tls_mask = NULL;
7475 lgot_ents = elf_local_got_ents (ibfd);
7476 if (lgot_ents != NULL)
7477 {
7478 struct plt_entry **local_plt = (struct plt_entry **)
7479 (lgot_ents + symtab_hdr->sh_info);
7480 unsigned char *lgot_masks = (unsigned char *)
7481 (local_plt + symtab_hdr->sh_info);
7482 tls_mask = &lgot_masks[r_symndx];
7483 }
7484 *tls_maskp = tls_mask;
7485 }
7486 }
7487 return TRUE;
7488 }
7489
7490 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7491 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7492 type suitable for optimization, and 1 otherwise. */
7493
7494 static int
7495 get_tls_mask (unsigned char **tls_maskp,
7496 unsigned long *toc_symndx,
7497 bfd_vma *toc_addend,
7498 Elf_Internal_Sym **locsymsp,
7499 const Elf_Internal_Rela *rel,
7500 bfd *ibfd)
7501 {
7502 unsigned long r_symndx;
7503 int next_r;
7504 struct elf_link_hash_entry *h;
7505 Elf_Internal_Sym *sym;
7506 asection *sec;
7507 bfd_vma off;
7508
7509 r_symndx = ELF64_R_SYM (rel->r_info);
7510 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7511 return 0;
7512
7513 if ((*tls_maskp != NULL && **tls_maskp != 0)
7514 || sec == NULL
7515 || ppc64_elf_section_data (sec) == NULL
7516 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7517 return 1;
7518
7519 /* Look inside a TOC section too. */
7520 if (h != NULL)
7521 {
7522 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7523 off = h->root.u.def.value;
7524 }
7525 else
7526 off = sym->st_value;
7527 off += rel->r_addend;
7528 BFD_ASSERT (off % 8 == 0);
7529 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7530 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7531 if (toc_symndx != NULL)
7532 *toc_symndx = r_symndx;
7533 if (toc_addend != NULL)
7534 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7535 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7536 return 0;
7537 if ((h == NULL || is_static_defined (h))
7538 && (next_r == -1 || next_r == -2))
7539 return 1 - next_r;
7540 return 1;
7541 }
7542
7543 /* Find (or create) an entry in the tocsave hash table. */
7544
7545 static struct tocsave_entry *
7546 tocsave_find (struct ppc_link_hash_table *htab,
7547 enum insert_option insert,
7548 Elf_Internal_Sym **local_syms,
7549 const Elf_Internal_Rela *irela,
7550 bfd *ibfd)
7551 {
7552 unsigned long r_indx;
7553 struct elf_link_hash_entry *h;
7554 Elf_Internal_Sym *sym;
7555 struct tocsave_entry ent, *p;
7556 hashval_t hash;
7557 struct tocsave_entry **slot;
7558
7559 r_indx = ELF64_R_SYM (irela->r_info);
7560 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7561 return NULL;
7562 if (ent.sec == NULL || ent.sec->output_section == NULL)
7563 {
7564 _bfd_error_handler
7565 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7566 return NULL;
7567 }
7568
7569 if (h != NULL)
7570 ent.offset = h->root.u.def.value;
7571 else
7572 ent.offset = sym->st_value;
7573 ent.offset += irela->r_addend;
7574
7575 hash = tocsave_htab_hash (&ent);
7576 slot = ((struct tocsave_entry **)
7577 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7578 if (slot == NULL)
7579 return NULL;
7580
7581 if (*slot == NULL)
7582 {
7583 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7584 if (p == NULL)
7585 return NULL;
7586 *p = ent;
7587 *slot = p;
7588 }
7589 return *slot;
7590 }
7591
7592 /* Adjust all global syms defined in opd sections. In gcc generated
7593 code for the old ABI, these will already have been done. */
7594
7595 static bfd_boolean
7596 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7597 {
7598 struct ppc_link_hash_entry *eh;
7599 asection *sym_sec;
7600 struct _opd_sec_data *opd;
7601
7602 if (h->root.type == bfd_link_hash_indirect)
7603 return TRUE;
7604
7605 if (h->root.type != bfd_link_hash_defined
7606 && h->root.type != bfd_link_hash_defweak)
7607 return TRUE;
7608
7609 eh = (struct ppc_link_hash_entry *) h;
7610 if (eh->adjust_done)
7611 return TRUE;
7612
7613 sym_sec = eh->elf.root.u.def.section;
7614 opd = get_opd_info (sym_sec);
7615 if (opd != NULL && opd->adjust != NULL)
7616 {
7617 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7618 if (adjust == -1)
7619 {
7620 /* This entry has been deleted. */
7621 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7622 if (dsec == NULL)
7623 {
7624 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7625 if (discarded_section (dsec))
7626 {
7627 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7628 break;
7629 }
7630 }
7631 eh->elf.root.u.def.value = 0;
7632 eh->elf.root.u.def.section = dsec;
7633 }
7634 else
7635 eh->elf.root.u.def.value += adjust;
7636 eh->adjust_done = 1;
7637 }
7638 return TRUE;
7639 }
7640
7641 /* Handles decrementing dynamic reloc counts for the reloc specified by
7642 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7643 have already been determined. */
7644
7645 static bfd_boolean
7646 dec_dynrel_count (bfd_vma r_info,
7647 asection *sec,
7648 struct bfd_link_info *info,
7649 Elf_Internal_Sym **local_syms,
7650 struct elf_link_hash_entry *h,
7651 Elf_Internal_Sym *sym)
7652 {
7653 enum elf_ppc64_reloc_type r_type;
7654 asection *sym_sec = NULL;
7655
7656 /* Can this reloc be dynamic? This switch, and later tests here
7657 should be kept in sync with the code in check_relocs. */
7658 r_type = ELF64_R_TYPE (r_info);
7659 switch (r_type)
7660 {
7661 default:
7662 return TRUE;
7663
7664 case R_PPC64_TPREL16:
7665 case R_PPC64_TPREL16_LO:
7666 case R_PPC64_TPREL16_HI:
7667 case R_PPC64_TPREL16_HA:
7668 case R_PPC64_TPREL16_DS:
7669 case R_PPC64_TPREL16_LO_DS:
7670 case R_PPC64_TPREL16_HIGH:
7671 case R_PPC64_TPREL16_HIGHA:
7672 case R_PPC64_TPREL16_HIGHER:
7673 case R_PPC64_TPREL16_HIGHERA:
7674 case R_PPC64_TPREL16_HIGHEST:
7675 case R_PPC64_TPREL16_HIGHESTA:
7676 case R_PPC64_TPREL64:
7677 case R_PPC64_DTPMOD64:
7678 case R_PPC64_DTPREL64:
7679 case R_PPC64_ADDR64:
7680 case R_PPC64_REL30:
7681 case R_PPC64_REL32:
7682 case R_PPC64_REL64:
7683 case R_PPC64_ADDR14:
7684 case R_PPC64_ADDR14_BRNTAKEN:
7685 case R_PPC64_ADDR14_BRTAKEN:
7686 case R_PPC64_ADDR16:
7687 case R_PPC64_ADDR16_DS:
7688 case R_PPC64_ADDR16_HA:
7689 case R_PPC64_ADDR16_HI:
7690 case R_PPC64_ADDR16_HIGH:
7691 case R_PPC64_ADDR16_HIGHA:
7692 case R_PPC64_ADDR16_HIGHER:
7693 case R_PPC64_ADDR16_HIGHERA:
7694 case R_PPC64_ADDR16_HIGHEST:
7695 case R_PPC64_ADDR16_HIGHESTA:
7696 case R_PPC64_ADDR16_LO:
7697 case R_PPC64_ADDR16_LO_DS:
7698 case R_PPC64_ADDR24:
7699 case R_PPC64_ADDR32:
7700 case R_PPC64_UADDR16:
7701 case R_PPC64_UADDR32:
7702 case R_PPC64_UADDR64:
7703 case R_PPC64_TOC:
7704 break;
7705 }
7706
7707 if (local_syms != NULL)
7708 {
7709 unsigned long r_symndx;
7710 bfd *ibfd = sec->owner;
7711
7712 r_symndx = ELF64_R_SYM (r_info);
7713 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7714 return FALSE;
7715 }
7716
7717 if ((bfd_link_pic (info)
7718 && (must_be_dyn_reloc (info, r_type)
7719 || (h != NULL
7720 && (!SYMBOLIC_BIND (info, h)
7721 || h->root.type == bfd_link_hash_defweak
7722 || !h->def_regular))))
7723 || (ELIMINATE_COPY_RELOCS
7724 && !bfd_link_pic (info)
7725 && h != NULL
7726 && (h->root.type == bfd_link_hash_defweak
7727 || !h->def_regular)))
7728 ;
7729 else
7730 return TRUE;
7731
7732 if (h != NULL)
7733 {
7734 struct elf_dyn_relocs *p;
7735 struct elf_dyn_relocs **pp;
7736 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7737
7738 /* elf_gc_sweep may have already removed all dyn relocs associated
7739 with local syms for a given section. Also, symbol flags are
7740 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7741 report a dynreloc miscount. */
7742 if (*pp == NULL && info->gc_sections)
7743 return TRUE;
7744
7745 while ((p = *pp) != NULL)
7746 {
7747 if (p->sec == sec)
7748 {
7749 if (!must_be_dyn_reloc (info, r_type))
7750 p->pc_count -= 1;
7751 p->count -= 1;
7752 if (p->count == 0)
7753 *pp = p->next;
7754 return TRUE;
7755 }
7756 pp = &p->next;
7757 }
7758 }
7759 else
7760 {
7761 struct ppc_dyn_relocs *p;
7762 struct ppc_dyn_relocs **pp;
7763 void *vpp;
7764 bfd_boolean is_ifunc;
7765
7766 if (local_syms == NULL)
7767 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7768 if (sym_sec == NULL)
7769 sym_sec = sec;
7770
7771 vpp = &elf_section_data (sym_sec)->local_dynrel;
7772 pp = (struct ppc_dyn_relocs **) vpp;
7773
7774 if (*pp == NULL && info->gc_sections)
7775 return TRUE;
7776
7777 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7778 while ((p = *pp) != NULL)
7779 {
7780 if (p->sec == sec && p->ifunc == is_ifunc)
7781 {
7782 p->count -= 1;
7783 if (p->count == 0)
7784 *pp = p->next;
7785 return TRUE;
7786 }
7787 pp = &p->next;
7788 }
7789 }
7790
7791 /* xgettext:c-format */
7792 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7793 sec->owner, sec);
7794 bfd_set_error (bfd_error_bad_value);
7795 return FALSE;
7796 }
7797
7798 /* Remove unused Official Procedure Descriptor entries. Currently we
7799 only remove those associated with functions in discarded link-once
7800 sections, or weakly defined functions that have been overridden. It
7801 would be possible to remove many more entries for statically linked
7802 applications. */
7803
7804 bfd_boolean
7805 ppc64_elf_edit_opd (struct bfd_link_info *info)
7806 {
7807 bfd *ibfd;
7808 bfd_boolean some_edited = FALSE;
7809 asection *need_pad = NULL;
7810 struct ppc_link_hash_table *htab;
7811
7812 htab = ppc_hash_table (info);
7813 if (htab == NULL)
7814 return FALSE;
7815
7816 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7817 {
7818 asection *sec;
7819 Elf_Internal_Rela *relstart, *rel, *relend;
7820 Elf_Internal_Shdr *symtab_hdr;
7821 Elf_Internal_Sym *local_syms;
7822 struct _opd_sec_data *opd;
7823 bfd_boolean need_edit, add_aux_fields, broken;
7824 bfd_size_type cnt_16b = 0;
7825
7826 if (!is_ppc64_elf (ibfd))
7827 continue;
7828
7829 sec = bfd_get_section_by_name (ibfd, ".opd");
7830 if (sec == NULL || sec->size == 0)
7831 continue;
7832
7833 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7834 continue;
7835
7836 if (sec->output_section == bfd_abs_section_ptr)
7837 continue;
7838
7839 /* Look through the section relocs. */
7840 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7841 continue;
7842
7843 local_syms = NULL;
7844 symtab_hdr = &elf_symtab_hdr (ibfd);
7845
7846 /* Read the relocations. */
7847 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7848 info->keep_memory);
7849 if (relstart == NULL)
7850 return FALSE;
7851
7852 /* First run through the relocs to check they are sane, and to
7853 determine whether we need to edit this opd section. */
7854 need_edit = FALSE;
7855 broken = FALSE;
7856 need_pad = sec;
7857 relend = relstart + sec->reloc_count;
7858 for (rel = relstart; rel < relend; )
7859 {
7860 enum elf_ppc64_reloc_type r_type;
7861 unsigned long r_symndx;
7862 asection *sym_sec;
7863 struct elf_link_hash_entry *h;
7864 Elf_Internal_Sym *sym;
7865 bfd_vma offset;
7866
7867 /* .opd contains an array of 16 or 24 byte entries. We're
7868 only interested in the reloc pointing to a function entry
7869 point. */
7870 offset = rel->r_offset;
7871 if (rel + 1 == relend
7872 || rel[1].r_offset != offset + 8)
7873 {
7874 /* If someone messes with .opd alignment then after a
7875 "ld -r" we might have padding in the middle of .opd.
7876 Also, there's nothing to prevent someone putting
7877 something silly in .opd with the assembler. No .opd
7878 optimization for them! */
7879 broken_opd:
7880 _bfd_error_handler
7881 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7882 broken = TRUE;
7883 break;
7884 }
7885
7886 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7887 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7888 {
7889 _bfd_error_handler
7890 /* xgettext:c-format */
7891 (_("%B: unexpected reloc type %u in .opd section"),
7892 ibfd, r_type);
7893 broken = TRUE;
7894 break;
7895 }
7896
7897 r_symndx = ELF64_R_SYM (rel->r_info);
7898 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7899 r_symndx, ibfd))
7900 goto error_ret;
7901
7902 if (sym_sec == NULL || sym_sec->owner == NULL)
7903 {
7904 const char *sym_name;
7905 if (h != NULL)
7906 sym_name = h->root.root.string;
7907 else
7908 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7909 sym_sec);
7910
7911 _bfd_error_handler
7912 /* xgettext:c-format */
7913 (_("%B: undefined sym `%s' in .opd section"),
7914 ibfd, sym_name);
7915 broken = TRUE;
7916 break;
7917 }
7918
7919 /* opd entries are always for functions defined in the
7920 current input bfd. If the symbol isn't defined in the
7921 input bfd, then we won't be using the function in this
7922 bfd; It must be defined in a linkonce section in another
7923 bfd, or is weak. It's also possible that we are
7924 discarding the function due to a linker script /DISCARD/,
7925 which we test for via the output_section. */
7926 if (sym_sec->owner != ibfd
7927 || sym_sec->output_section == bfd_abs_section_ptr)
7928 need_edit = TRUE;
7929
7930 rel += 2;
7931 if (rel + 1 == relend
7932 || (rel + 2 < relend
7933 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7934 ++rel;
7935
7936 if (rel == relend)
7937 {
7938 if (sec->size == offset + 24)
7939 {
7940 need_pad = NULL;
7941 break;
7942 }
7943 if (sec->size == offset + 16)
7944 {
7945 cnt_16b++;
7946 break;
7947 }
7948 goto broken_opd;
7949 }
7950 else if (rel + 1 < relend
7951 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7952 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7953 {
7954 if (rel[0].r_offset == offset + 16)
7955 cnt_16b++;
7956 else if (rel[0].r_offset != offset + 24)
7957 goto broken_opd;
7958 }
7959 else
7960 goto broken_opd;
7961 }
7962
7963 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7964
7965 if (!broken && (need_edit || add_aux_fields))
7966 {
7967 Elf_Internal_Rela *write_rel;
7968 Elf_Internal_Shdr *rel_hdr;
7969 bfd_byte *rptr, *wptr;
7970 bfd_byte *new_contents;
7971 bfd_size_type amt;
7972
7973 new_contents = NULL;
7974 amt = OPD_NDX (sec->size) * sizeof (long);
7975 opd = &ppc64_elf_section_data (sec)->u.opd;
7976 opd->adjust = bfd_zalloc (sec->owner, amt);
7977 if (opd->adjust == NULL)
7978 return FALSE;
7979
7980 /* This seems a waste of time as input .opd sections are all
7981 zeros as generated by gcc, but I suppose there's no reason
7982 this will always be so. We might start putting something in
7983 the third word of .opd entries. */
7984 if ((sec->flags & SEC_IN_MEMORY) == 0)
7985 {
7986 bfd_byte *loc;
7987 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7988 {
7989 if (loc != NULL)
7990 free (loc);
7991 error_ret:
7992 if (local_syms != NULL
7993 && symtab_hdr->contents != (unsigned char *) local_syms)
7994 free (local_syms);
7995 if (elf_section_data (sec)->relocs != relstart)
7996 free (relstart);
7997 return FALSE;
7998 }
7999 sec->contents = loc;
8000 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8001 }
8002
8003 elf_section_data (sec)->relocs = relstart;
8004
8005 new_contents = sec->contents;
8006 if (add_aux_fields)
8007 {
8008 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8009 if (new_contents == NULL)
8010 return FALSE;
8011 need_pad = NULL;
8012 }
8013 wptr = new_contents;
8014 rptr = sec->contents;
8015 write_rel = relstart;
8016 for (rel = relstart; rel < relend; )
8017 {
8018 unsigned long r_symndx;
8019 asection *sym_sec;
8020 struct elf_link_hash_entry *h;
8021 struct ppc_link_hash_entry *fdh = NULL;
8022 Elf_Internal_Sym *sym;
8023 long opd_ent_size;
8024 Elf_Internal_Rela *next_rel;
8025 bfd_boolean skip;
8026
8027 r_symndx = ELF64_R_SYM (rel->r_info);
8028 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8029 r_symndx, ibfd))
8030 goto error_ret;
8031
8032 next_rel = rel + 2;
8033 if (next_rel + 1 == relend
8034 || (next_rel + 2 < relend
8035 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8036 ++next_rel;
8037
8038 /* See if the .opd entry is full 24 byte or
8039 16 byte (with fd_aux entry overlapped with next
8040 fd_func). */
8041 opd_ent_size = 24;
8042 if (next_rel == relend)
8043 {
8044 if (sec->size == rel->r_offset + 16)
8045 opd_ent_size = 16;
8046 }
8047 else if (next_rel->r_offset == rel->r_offset + 16)
8048 opd_ent_size = 16;
8049
8050 if (h != NULL
8051 && h->root.root.string[0] == '.')
8052 {
8053 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8054 if (fdh != NULL)
8055 {
8056 fdh = ppc_follow_link (fdh);
8057 if (fdh->elf.root.type != bfd_link_hash_defined
8058 && fdh->elf.root.type != bfd_link_hash_defweak)
8059 fdh = NULL;
8060 }
8061 }
8062
8063 skip = (sym_sec->owner != ibfd
8064 || sym_sec->output_section == bfd_abs_section_ptr);
8065 if (skip)
8066 {
8067 if (fdh != NULL && sym_sec->owner == ibfd)
8068 {
8069 /* Arrange for the function descriptor sym
8070 to be dropped. */
8071 fdh->elf.root.u.def.value = 0;
8072 fdh->elf.root.u.def.section = sym_sec;
8073 }
8074 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8075
8076 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8077 rel = next_rel;
8078 else
8079 while (1)
8080 {
8081 if (!dec_dynrel_count (rel->r_info, sec, info,
8082 NULL, h, sym))
8083 goto error_ret;
8084
8085 if (++rel == next_rel)
8086 break;
8087
8088 r_symndx = ELF64_R_SYM (rel->r_info);
8089 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8090 r_symndx, ibfd))
8091 goto error_ret;
8092 }
8093 }
8094 else
8095 {
8096 /* We'll be keeping this opd entry. */
8097 long adjust;
8098
8099 if (fdh != NULL)
8100 {
8101 /* Redefine the function descriptor symbol to
8102 this location in the opd section. It is
8103 necessary to update the value here rather
8104 than using an array of adjustments as we do
8105 for local symbols, because various places
8106 in the generic ELF code use the value
8107 stored in u.def.value. */
8108 fdh->elf.root.u.def.value = wptr - new_contents;
8109 fdh->adjust_done = 1;
8110 }
8111
8112 /* Local syms are a bit tricky. We could
8113 tweak them as they can be cached, but
8114 we'd need to look through the local syms
8115 for the function descriptor sym which we
8116 don't have at the moment. So keep an
8117 array of adjustments. */
8118 adjust = (wptr - new_contents) - (rptr - sec->contents);
8119 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8120
8121 if (wptr != rptr)
8122 memcpy (wptr, rptr, opd_ent_size);
8123 wptr += opd_ent_size;
8124 if (add_aux_fields && opd_ent_size == 16)
8125 {
8126 memset (wptr, '\0', 8);
8127 wptr += 8;
8128 }
8129
8130 /* We need to adjust any reloc offsets to point to the
8131 new opd entries. */
8132 for ( ; rel != next_rel; ++rel)
8133 {
8134 rel->r_offset += adjust;
8135 if (write_rel != rel)
8136 memcpy (write_rel, rel, sizeof (*rel));
8137 ++write_rel;
8138 }
8139 }
8140
8141 rptr += opd_ent_size;
8142 }
8143
8144 sec->size = wptr - new_contents;
8145 sec->reloc_count = write_rel - relstart;
8146 if (add_aux_fields)
8147 {
8148 free (sec->contents);
8149 sec->contents = new_contents;
8150 }
8151
8152 /* Fudge the header size too, as this is used later in
8153 elf_bfd_final_link if we are emitting relocs. */
8154 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8155 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8156 some_edited = TRUE;
8157 }
8158 else if (elf_section_data (sec)->relocs != relstart)
8159 free (relstart);
8160
8161 if (local_syms != NULL
8162 && symtab_hdr->contents != (unsigned char *) local_syms)
8163 {
8164 if (!info->keep_memory)
8165 free (local_syms);
8166 else
8167 symtab_hdr->contents = (unsigned char *) local_syms;
8168 }
8169 }
8170
8171 if (some_edited)
8172 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8173
8174 /* If we are doing a final link and the last .opd entry is just 16 byte
8175 long, add a 8 byte padding after it. */
8176 if (need_pad != NULL && !bfd_link_relocatable (info))
8177 {
8178 bfd_byte *p;
8179
8180 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8181 {
8182 BFD_ASSERT (need_pad->size > 0);
8183
8184 p = bfd_malloc (need_pad->size + 8);
8185 if (p == NULL)
8186 return FALSE;
8187
8188 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8189 p, 0, need_pad->size))
8190 return FALSE;
8191
8192 need_pad->contents = p;
8193 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8194 }
8195 else
8196 {
8197 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8198 if (p == NULL)
8199 return FALSE;
8200
8201 need_pad->contents = p;
8202 }
8203
8204 memset (need_pad->contents + need_pad->size, 0, 8);
8205 need_pad->size += 8;
8206 }
8207
8208 return TRUE;
8209 }
8210
8211 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8212
8213 asection *
8214 ppc64_elf_tls_setup (struct bfd_link_info *info)
8215 {
8216 struct ppc_link_hash_table *htab;
8217
8218 htab = ppc_hash_table (info);
8219 if (htab == NULL)
8220 return NULL;
8221
8222 if (abiversion (info->output_bfd) == 1)
8223 htab->opd_abi = 1;
8224
8225 if (htab->params->no_multi_toc)
8226 htab->do_multi_toc = 0;
8227 else if (!htab->do_multi_toc)
8228 htab->params->no_multi_toc = 1;
8229
8230 /* Default to --no-plt-localentry, as this option can cause problems
8231 with symbol interposition. For example, glibc libpthread.so and
8232 libc.so duplicate many pthread symbols, with a fallback
8233 implementation in libc.so. In some cases the fallback does more
8234 work than the pthread implementation. __pthread_condattr_destroy
8235 is one such symbol: the libpthread.so implementation is
8236 localentry:0 while the libc.so implementation is localentry:8.
8237 An app that "cleverly" uses dlopen to only load necessary
8238 libraries at runtime may omit loading libpthread.so when not
8239 running multi-threaded, which then results in the libc.so
8240 fallback symbols being used and ld.so complaining. Now there
8241 are workarounds in ld (see non_zero_localentry) to detect the
8242 pthread situation, but that may not be the only case where
8243 --plt-localentry can cause trouble. */
8244 if (htab->params->plt_localentry0 < 0)
8245 htab->params->plt_localentry0 = 0;
8246 if (htab->params->plt_localentry0
8247 && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26",
8248 FALSE, FALSE, FALSE) == NULL)
8249 info->callbacks->einfo
8250 (_("%P: warning: --plt-localentry is especially dangerous without "
8251 "ld.so support to detect ABI violations.\n"));
8252
8253 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8254 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8255 FALSE, FALSE, TRUE));
8256 /* Move dynamic linking info to the function descriptor sym. */
8257 if (htab->tls_get_addr != NULL)
8258 func_desc_adjust (&htab->tls_get_addr->elf, info);
8259 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8260 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8261 FALSE, FALSE, TRUE));
8262 if (htab->params->tls_get_addr_opt)
8263 {
8264 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8265
8266 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8267 FALSE, FALSE, TRUE);
8268 if (opt != NULL)
8269 func_desc_adjust (opt, info);
8270 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8271 FALSE, FALSE, TRUE);
8272 if (opt_fd != NULL
8273 && (opt_fd->root.type == bfd_link_hash_defined
8274 || opt_fd->root.type == bfd_link_hash_defweak))
8275 {
8276 /* If glibc supports an optimized __tls_get_addr call stub,
8277 signalled by the presence of __tls_get_addr_opt, and we'll
8278 be calling __tls_get_addr via a plt call stub, then
8279 make __tls_get_addr point to __tls_get_addr_opt. */
8280 tga_fd = &htab->tls_get_addr_fd->elf;
8281 if (htab->elf.dynamic_sections_created
8282 && tga_fd != NULL
8283 && (tga_fd->type == STT_FUNC
8284 || tga_fd->needs_plt)
8285 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8286 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))
8287 {
8288 struct plt_entry *ent;
8289
8290 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8291 if (ent->plt.refcount > 0)
8292 break;
8293 if (ent != NULL)
8294 {
8295 tga_fd->root.type = bfd_link_hash_indirect;
8296 tga_fd->root.u.i.link = &opt_fd->root;
8297 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8298 opt_fd->mark = 1;
8299 if (opt_fd->dynindx != -1)
8300 {
8301 /* Use __tls_get_addr_opt in dynamic relocations. */
8302 opt_fd->dynindx = -1;
8303 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8304 opt_fd->dynstr_index);
8305 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8306 return NULL;
8307 }
8308 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8309 tga = &htab->tls_get_addr->elf;
8310 if (opt != NULL && tga != NULL)
8311 {
8312 tga->root.type = bfd_link_hash_indirect;
8313 tga->root.u.i.link = &opt->root;
8314 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8315 opt->mark = 1;
8316 _bfd_elf_link_hash_hide_symbol (info, opt,
8317 tga->forced_local);
8318 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8319 }
8320 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8321 htab->tls_get_addr_fd->is_func_descriptor = 1;
8322 if (htab->tls_get_addr != NULL)
8323 {
8324 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8325 htab->tls_get_addr->is_func = 1;
8326 }
8327 }
8328 }
8329 }
8330 else if (htab->params->tls_get_addr_opt < 0)
8331 htab->params->tls_get_addr_opt = 0;
8332 }
8333 return _bfd_elf_tls_setup (info->output_bfd, info);
8334 }
8335
8336 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8337 HASH1 or HASH2. */
8338
8339 static bfd_boolean
8340 branch_reloc_hash_match (const bfd *ibfd,
8341 const Elf_Internal_Rela *rel,
8342 const struct ppc_link_hash_entry *hash1,
8343 const struct ppc_link_hash_entry *hash2)
8344 {
8345 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8346 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8347 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8348
8349 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8350 {
8351 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8352 struct elf_link_hash_entry *h;
8353
8354 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8355 h = elf_follow_link (h);
8356 if (h == &hash1->elf || h == &hash2->elf)
8357 return TRUE;
8358 }
8359 return FALSE;
8360 }
8361
8362 /* Run through all the TLS relocs looking for optimization
8363 opportunities. The linker has been hacked (see ppc64elf.em) to do
8364 a preliminary section layout so that we know the TLS segment
8365 offsets. We can't optimize earlier because some optimizations need
8366 to know the tp offset, and we need to optimize before allocating
8367 dynamic relocations. */
8368
8369 bfd_boolean
8370 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8371 {
8372 bfd *ibfd;
8373 asection *sec;
8374 struct ppc_link_hash_table *htab;
8375 unsigned char *toc_ref;
8376 int pass;
8377
8378 if (!bfd_link_executable (info))
8379 return TRUE;
8380
8381 htab = ppc_hash_table (info);
8382 if (htab == NULL)
8383 return FALSE;
8384
8385 /* Make two passes over the relocs. On the first pass, mark toc
8386 entries involved with tls relocs, and check that tls relocs
8387 involved in setting up a tls_get_addr call are indeed followed by
8388 such a call. If they are not, we can't do any tls optimization.
8389 On the second pass twiddle tls_mask flags to notify
8390 relocate_section that optimization can be done, and adjust got
8391 and plt refcounts. */
8392 toc_ref = NULL;
8393 for (pass = 0; pass < 2; ++pass)
8394 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8395 {
8396 Elf_Internal_Sym *locsyms = NULL;
8397 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8398
8399 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8400 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8401 {
8402 Elf_Internal_Rela *relstart, *rel, *relend;
8403 bfd_boolean found_tls_get_addr_arg = 0;
8404
8405 /* Read the relocations. */
8406 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8407 info->keep_memory);
8408 if (relstart == NULL)
8409 {
8410 free (toc_ref);
8411 return FALSE;
8412 }
8413
8414 relend = relstart + sec->reloc_count;
8415 for (rel = relstart; rel < relend; rel++)
8416 {
8417 enum elf_ppc64_reloc_type r_type;
8418 unsigned long r_symndx;
8419 struct elf_link_hash_entry *h;
8420 Elf_Internal_Sym *sym;
8421 asection *sym_sec;
8422 unsigned char *tls_mask;
8423 unsigned char tls_set, tls_clear, tls_type = 0;
8424 bfd_vma value;
8425 bfd_boolean ok_tprel, is_local;
8426 long toc_ref_index = 0;
8427 int expecting_tls_get_addr = 0;
8428 bfd_boolean ret = FALSE;
8429
8430 r_symndx = ELF64_R_SYM (rel->r_info);
8431 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8432 r_symndx, ibfd))
8433 {
8434 err_free_rel:
8435 if (elf_section_data (sec)->relocs != relstart)
8436 free (relstart);
8437 if (toc_ref != NULL)
8438 free (toc_ref);
8439 if (locsyms != NULL
8440 && (elf_symtab_hdr (ibfd).contents
8441 != (unsigned char *) locsyms))
8442 free (locsyms);
8443 return ret;
8444 }
8445
8446 if (h != NULL)
8447 {
8448 if (h->root.type == bfd_link_hash_defined
8449 || h->root.type == bfd_link_hash_defweak)
8450 value = h->root.u.def.value;
8451 else if (h->root.type == bfd_link_hash_undefweak)
8452 value = 0;
8453 else
8454 {
8455 found_tls_get_addr_arg = 0;
8456 continue;
8457 }
8458 }
8459 else
8460 /* Symbols referenced by TLS relocs must be of type
8461 STT_TLS. So no need for .opd local sym adjust. */
8462 value = sym->st_value;
8463
8464 ok_tprel = FALSE;
8465 is_local = FALSE;
8466 if (h == NULL
8467 || !h->def_dynamic)
8468 {
8469 is_local = TRUE;
8470 if (h != NULL
8471 && h->root.type == bfd_link_hash_undefweak)
8472 ok_tprel = TRUE;
8473 else if (sym_sec != NULL
8474 && sym_sec->output_section != NULL)
8475 {
8476 value += sym_sec->output_offset;
8477 value += sym_sec->output_section->vma;
8478 value -= htab->elf.tls_sec->vma;
8479 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8480 < (bfd_vma) 1 << 32);
8481 }
8482 }
8483
8484 r_type = ELF64_R_TYPE (rel->r_info);
8485 /* If this section has old-style __tls_get_addr calls
8486 without marker relocs, then check that each
8487 __tls_get_addr call reloc is preceded by a reloc
8488 that conceivably belongs to the __tls_get_addr arg
8489 setup insn. If we don't find matching arg setup
8490 relocs, don't do any tls optimization. */
8491 if (pass == 0
8492 && sec->has_tls_get_addr_call
8493 && h != NULL
8494 && (h == &htab->tls_get_addr->elf
8495 || h == &htab->tls_get_addr_fd->elf)
8496 && !found_tls_get_addr_arg
8497 && is_branch_reloc (r_type))
8498 {
8499 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8500 "TLS optimization disabled\n"),
8501 ibfd, sec, rel->r_offset);
8502 ret = TRUE;
8503 goto err_free_rel;
8504 }
8505
8506 found_tls_get_addr_arg = 0;
8507 switch (r_type)
8508 {
8509 case R_PPC64_GOT_TLSLD16:
8510 case R_PPC64_GOT_TLSLD16_LO:
8511 expecting_tls_get_addr = 1;
8512 found_tls_get_addr_arg = 1;
8513 /* Fall through. */
8514
8515 case R_PPC64_GOT_TLSLD16_HI:
8516 case R_PPC64_GOT_TLSLD16_HA:
8517 /* These relocs should never be against a symbol
8518 defined in a shared lib. Leave them alone if
8519 that turns out to be the case. */
8520 if (!is_local)
8521 continue;
8522
8523 /* LD -> LE */
8524 tls_set = 0;
8525 tls_clear = TLS_LD;
8526 tls_type = TLS_TLS | TLS_LD;
8527 break;
8528
8529 case R_PPC64_GOT_TLSGD16:
8530 case R_PPC64_GOT_TLSGD16_LO:
8531 expecting_tls_get_addr = 1;
8532 found_tls_get_addr_arg = 1;
8533 /* Fall through. */
8534
8535 case R_PPC64_GOT_TLSGD16_HI:
8536 case R_PPC64_GOT_TLSGD16_HA:
8537 if (ok_tprel)
8538 /* GD -> LE */
8539 tls_set = 0;
8540 else
8541 /* GD -> IE */
8542 tls_set = TLS_TLS | TLS_TPRELGD;
8543 tls_clear = TLS_GD;
8544 tls_type = TLS_TLS | TLS_GD;
8545 break;
8546
8547 case R_PPC64_GOT_TPREL16_DS:
8548 case R_PPC64_GOT_TPREL16_LO_DS:
8549 case R_PPC64_GOT_TPREL16_HI:
8550 case R_PPC64_GOT_TPREL16_HA:
8551 if (ok_tprel)
8552 {
8553 /* IE -> LE */
8554 tls_set = 0;
8555 tls_clear = TLS_TPREL;
8556 tls_type = TLS_TLS | TLS_TPREL;
8557 break;
8558 }
8559 continue;
8560
8561 case R_PPC64_TLSGD:
8562 case R_PPC64_TLSLD:
8563 found_tls_get_addr_arg = 1;
8564 /* Fall through. */
8565
8566 case R_PPC64_TLS:
8567 case R_PPC64_TOC16:
8568 case R_PPC64_TOC16_LO:
8569 if (sym_sec == NULL || sym_sec != toc)
8570 continue;
8571
8572 /* Mark this toc entry as referenced by a TLS
8573 code sequence. We can do that now in the
8574 case of R_PPC64_TLS, and after checking for
8575 tls_get_addr for the TOC16 relocs. */
8576 if (toc_ref == NULL)
8577 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8578 if (toc_ref == NULL)
8579 goto err_free_rel;
8580
8581 if (h != NULL)
8582 value = h->root.u.def.value;
8583 else
8584 value = sym->st_value;
8585 value += rel->r_addend;
8586 if (value % 8 != 0)
8587 continue;
8588 BFD_ASSERT (value < toc->size
8589 && toc->output_offset % 8 == 0);
8590 toc_ref_index = (value + toc->output_offset) / 8;
8591 if (r_type == R_PPC64_TLS
8592 || r_type == R_PPC64_TLSGD
8593 || r_type == R_PPC64_TLSLD)
8594 {
8595 toc_ref[toc_ref_index] = 1;
8596 continue;
8597 }
8598
8599 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8600 continue;
8601
8602 tls_set = 0;
8603 tls_clear = 0;
8604 expecting_tls_get_addr = 2;
8605 break;
8606
8607 case R_PPC64_TPREL64:
8608 if (pass == 0
8609 || sec != toc
8610 || toc_ref == NULL
8611 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8612 continue;
8613 if (ok_tprel)
8614 {
8615 /* IE -> LE */
8616 tls_set = TLS_EXPLICIT;
8617 tls_clear = TLS_TPREL;
8618 break;
8619 }
8620 continue;
8621
8622 case R_PPC64_DTPMOD64:
8623 if (pass == 0
8624 || sec != toc
8625 || toc_ref == NULL
8626 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8627 continue;
8628 if (rel + 1 < relend
8629 && (rel[1].r_info
8630 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8631 && rel[1].r_offset == rel->r_offset + 8)
8632 {
8633 if (ok_tprel)
8634 /* GD -> LE */
8635 tls_set = TLS_EXPLICIT | TLS_GD;
8636 else
8637 /* GD -> IE */
8638 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8639 tls_clear = TLS_GD;
8640 }
8641 else
8642 {
8643 if (!is_local)
8644 continue;
8645
8646 /* LD -> LE */
8647 tls_set = TLS_EXPLICIT;
8648 tls_clear = TLS_LD;
8649 }
8650 break;
8651
8652 default:
8653 continue;
8654 }
8655
8656 if (pass == 0)
8657 {
8658 if (!expecting_tls_get_addr
8659 || !sec->has_tls_get_addr_call)
8660 continue;
8661
8662 if (rel + 1 < relend
8663 && branch_reloc_hash_match (ibfd, rel + 1,
8664 htab->tls_get_addr,
8665 htab->tls_get_addr_fd))
8666 {
8667 if (expecting_tls_get_addr == 2)
8668 {
8669 /* Check for toc tls entries. */
8670 unsigned char *toc_tls;
8671 int retval;
8672
8673 retval = get_tls_mask (&toc_tls, NULL, NULL,
8674 &locsyms,
8675 rel, ibfd);
8676 if (retval == 0)
8677 goto err_free_rel;
8678 if (toc_tls != NULL)
8679 {
8680 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8681 found_tls_get_addr_arg = 1;
8682 if (retval > 1)
8683 toc_ref[toc_ref_index] = 1;
8684 }
8685 }
8686 continue;
8687 }
8688
8689 if (expecting_tls_get_addr != 1)
8690 continue;
8691
8692 /* Uh oh, we didn't find the expected call. We
8693 could just mark this symbol to exclude it
8694 from tls optimization but it's safer to skip
8695 the entire optimization. */
8696 /* xgettext:c-format */
8697 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8698 "TLS optimization disabled\n"),
8699 ibfd, sec, rel->r_offset);
8700 ret = TRUE;
8701 goto err_free_rel;
8702 }
8703
8704 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8705 {
8706 struct plt_entry *ent;
8707 for (ent = htab->tls_get_addr->elf.plt.plist;
8708 ent != NULL;
8709 ent = ent->next)
8710 if (ent->addend == 0)
8711 {
8712 if (ent->plt.refcount > 0)
8713 {
8714 ent->plt.refcount -= 1;
8715 expecting_tls_get_addr = 0;
8716 }
8717 break;
8718 }
8719 }
8720
8721 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8722 {
8723 struct plt_entry *ent;
8724 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8725 ent != NULL;
8726 ent = ent->next)
8727 if (ent->addend == 0)
8728 {
8729 if (ent->plt.refcount > 0)
8730 ent->plt.refcount -= 1;
8731 break;
8732 }
8733 }
8734
8735 if (tls_clear == 0)
8736 continue;
8737
8738 if ((tls_set & TLS_EXPLICIT) == 0)
8739 {
8740 struct got_entry *ent;
8741
8742 /* Adjust got entry for this reloc. */
8743 if (h != NULL)
8744 ent = h->got.glist;
8745 else
8746 ent = elf_local_got_ents (ibfd)[r_symndx];
8747
8748 for (; ent != NULL; ent = ent->next)
8749 if (ent->addend == rel->r_addend
8750 && ent->owner == ibfd
8751 && ent->tls_type == tls_type)
8752 break;
8753 if (ent == NULL)
8754 abort ();
8755
8756 if (tls_set == 0)
8757 {
8758 /* We managed to get rid of a got entry. */
8759 if (ent->got.refcount > 0)
8760 ent->got.refcount -= 1;
8761 }
8762 }
8763 else
8764 {
8765 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8766 we'll lose one or two dyn relocs. */
8767 if (!dec_dynrel_count (rel->r_info, sec, info,
8768 NULL, h, sym))
8769 return FALSE;
8770
8771 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8772 {
8773 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8774 NULL, h, sym))
8775 return FALSE;
8776 }
8777 }
8778
8779 *tls_mask |= tls_set;
8780 *tls_mask &= ~tls_clear;
8781 }
8782
8783 if (elf_section_data (sec)->relocs != relstart)
8784 free (relstart);
8785 }
8786
8787 if (locsyms != NULL
8788 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8789 {
8790 if (!info->keep_memory)
8791 free (locsyms);
8792 else
8793 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8794 }
8795 }
8796
8797 if (toc_ref != NULL)
8798 free (toc_ref);
8799 htab->do_tls_opt = 1;
8800 return TRUE;
8801 }
8802
8803 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8804 the values of any global symbols in a toc section that has been
8805 edited. Globals in toc sections should be a rarity, so this function
8806 sets a flag if any are found in toc sections other than the one just
8807 edited, so that further hash table traversals can be avoided. */
8808
8809 struct adjust_toc_info
8810 {
8811 asection *toc;
8812 unsigned long *skip;
8813 bfd_boolean global_toc_syms;
8814 };
8815
8816 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8817
8818 static bfd_boolean
8819 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8820 {
8821 struct ppc_link_hash_entry *eh;
8822 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8823 unsigned long i;
8824
8825 if (h->root.type != bfd_link_hash_defined
8826 && h->root.type != bfd_link_hash_defweak)
8827 return TRUE;
8828
8829 eh = (struct ppc_link_hash_entry *) h;
8830 if (eh->adjust_done)
8831 return TRUE;
8832
8833 if (eh->elf.root.u.def.section == toc_inf->toc)
8834 {
8835 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8836 i = toc_inf->toc->rawsize >> 3;
8837 else
8838 i = eh->elf.root.u.def.value >> 3;
8839
8840 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8841 {
8842 _bfd_error_handler
8843 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8844 do
8845 ++i;
8846 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8847 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8848 }
8849
8850 eh->elf.root.u.def.value -= toc_inf->skip[i];
8851 eh->adjust_done = 1;
8852 }
8853 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8854 toc_inf->global_toc_syms = TRUE;
8855
8856 return TRUE;
8857 }
8858
8859 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8860 on a _LO variety toc/got reloc. */
8861
8862 static bfd_boolean
8863 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8864 {
8865 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8866 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8867 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8868 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8869 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8870 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8871 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8872 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8873 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8874 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8875 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8876 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8877 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8878 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8879 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8880 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8881 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8882 /* Exclude lfqu by testing reloc. If relocs are ever
8883 defined for the reduced D field in psq_lu then those
8884 will need testing too. */
8885 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8886 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8887 && (insn & 1) == 0)
8888 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8889 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8890 /* Exclude stfqu. psq_stu as above for psq_lu. */
8891 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8892 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8893 && (insn & 1) == 0));
8894 }
8895
8896 /* Examine all relocs referencing .toc sections in order to remove
8897 unused .toc entries. */
8898
8899 bfd_boolean
8900 ppc64_elf_edit_toc (struct bfd_link_info *info)
8901 {
8902 bfd *ibfd;
8903 struct adjust_toc_info toc_inf;
8904 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8905
8906 htab->do_toc_opt = 1;
8907 toc_inf.global_toc_syms = TRUE;
8908 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8909 {
8910 asection *toc, *sec;
8911 Elf_Internal_Shdr *symtab_hdr;
8912 Elf_Internal_Sym *local_syms;
8913 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8914 unsigned long *skip, *drop;
8915 unsigned char *used;
8916 unsigned char *keep, last, some_unused;
8917
8918 if (!is_ppc64_elf (ibfd))
8919 continue;
8920
8921 toc = bfd_get_section_by_name (ibfd, ".toc");
8922 if (toc == NULL
8923 || toc->size == 0
8924 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8925 || discarded_section (toc))
8926 continue;
8927
8928 toc_relocs = NULL;
8929 local_syms = NULL;
8930 symtab_hdr = &elf_symtab_hdr (ibfd);
8931
8932 /* Look at sections dropped from the final link. */
8933 skip = NULL;
8934 relstart = NULL;
8935 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8936 {
8937 if (sec->reloc_count == 0
8938 || !discarded_section (sec)
8939 || get_opd_info (sec)
8940 || (sec->flags & SEC_ALLOC) == 0
8941 || (sec->flags & SEC_DEBUGGING) != 0)
8942 continue;
8943
8944 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8945 if (relstart == NULL)
8946 goto error_ret;
8947
8948 /* Run through the relocs to see which toc entries might be
8949 unused. */
8950 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8951 {
8952 enum elf_ppc64_reloc_type r_type;
8953 unsigned long r_symndx;
8954 asection *sym_sec;
8955 struct elf_link_hash_entry *h;
8956 Elf_Internal_Sym *sym;
8957 bfd_vma val;
8958
8959 r_type = ELF64_R_TYPE (rel->r_info);
8960 switch (r_type)
8961 {
8962 default:
8963 continue;
8964
8965 case R_PPC64_TOC16:
8966 case R_PPC64_TOC16_LO:
8967 case R_PPC64_TOC16_HI:
8968 case R_PPC64_TOC16_HA:
8969 case R_PPC64_TOC16_DS:
8970 case R_PPC64_TOC16_LO_DS:
8971 break;
8972 }
8973
8974 r_symndx = ELF64_R_SYM (rel->r_info);
8975 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8976 r_symndx, ibfd))
8977 goto error_ret;
8978
8979 if (sym_sec != toc)
8980 continue;
8981
8982 if (h != NULL)
8983 val = h->root.u.def.value;
8984 else
8985 val = sym->st_value;
8986 val += rel->r_addend;
8987
8988 if (val >= toc->size)
8989 continue;
8990
8991 /* Anything in the toc ought to be aligned to 8 bytes.
8992 If not, don't mark as unused. */
8993 if (val & 7)
8994 continue;
8995
8996 if (skip == NULL)
8997 {
8998 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8999 if (skip == NULL)
9000 goto error_ret;
9001 }
9002
9003 skip[val >> 3] = ref_from_discarded;
9004 }
9005
9006 if (elf_section_data (sec)->relocs != relstart)
9007 free (relstart);
9008 }
9009
9010 /* For largetoc loads of address constants, we can convert
9011 . addis rx,2,addr@got@ha
9012 . ld ry,addr@got@l(rx)
9013 to
9014 . addis rx,2,addr@toc@ha
9015 . addi ry,rx,addr@toc@l
9016 when addr is within 2G of the toc pointer. This then means
9017 that the word storing "addr" in the toc is no longer needed. */
9018
9019 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9020 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9021 && toc->reloc_count != 0)
9022 {
9023 /* Read toc relocs. */
9024 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9025 info->keep_memory);
9026 if (toc_relocs == NULL)
9027 goto error_ret;
9028
9029 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9030 {
9031 enum elf_ppc64_reloc_type r_type;
9032 unsigned long r_symndx;
9033 asection *sym_sec;
9034 struct elf_link_hash_entry *h;
9035 Elf_Internal_Sym *sym;
9036 bfd_vma val, addr;
9037
9038 r_type = ELF64_R_TYPE (rel->r_info);
9039 if (r_type != R_PPC64_ADDR64)
9040 continue;
9041
9042 r_symndx = ELF64_R_SYM (rel->r_info);
9043 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9044 r_symndx, ibfd))
9045 goto error_ret;
9046
9047 if (sym_sec == NULL
9048 || sym_sec->output_section == NULL
9049 || discarded_section (sym_sec))
9050 continue;
9051
9052 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9053 continue;
9054
9055 if (h != NULL)
9056 {
9057 if (h->type == STT_GNU_IFUNC)
9058 continue;
9059 val = h->root.u.def.value;
9060 }
9061 else
9062 {
9063 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9064 continue;
9065 val = sym->st_value;
9066 }
9067 val += rel->r_addend;
9068 val += sym_sec->output_section->vma + sym_sec->output_offset;
9069
9070 /* We don't yet know the exact toc pointer value, but we
9071 know it will be somewhere in the toc section. Don't
9072 optimize if the difference from any possible toc
9073 pointer is outside [ff..f80008000, 7fff7fff]. */
9074 addr = toc->output_section->vma + TOC_BASE_OFF;
9075 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9076 continue;
9077
9078 addr = toc->output_section->vma + toc->output_section->rawsize;
9079 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9080 continue;
9081
9082 if (skip == NULL)
9083 {
9084 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9085 if (skip == NULL)
9086 goto error_ret;
9087 }
9088
9089 skip[rel->r_offset >> 3]
9090 |= can_optimize | ((rel - toc_relocs) << 2);
9091 }
9092 }
9093
9094 if (skip == NULL)
9095 continue;
9096
9097 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9098 if (used == NULL)
9099 {
9100 error_ret:
9101 if (local_syms != NULL
9102 && symtab_hdr->contents != (unsigned char *) local_syms)
9103 free (local_syms);
9104 if (sec != NULL
9105 && relstart != NULL
9106 && elf_section_data (sec)->relocs != relstart)
9107 free (relstart);
9108 if (toc_relocs != NULL
9109 && elf_section_data (toc)->relocs != toc_relocs)
9110 free (toc_relocs);
9111 if (skip != NULL)
9112 free (skip);
9113 return FALSE;
9114 }
9115
9116 /* Now check all kept sections that might reference the toc.
9117 Check the toc itself last. */
9118 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9119 : ibfd->sections);
9120 sec != NULL;
9121 sec = (sec == toc ? NULL
9122 : sec->next == NULL ? toc
9123 : sec->next == toc && toc->next ? toc->next
9124 : sec->next))
9125 {
9126 int repeat;
9127
9128 if (sec->reloc_count == 0
9129 || discarded_section (sec)
9130 || get_opd_info (sec)
9131 || (sec->flags & SEC_ALLOC) == 0
9132 || (sec->flags & SEC_DEBUGGING) != 0)
9133 continue;
9134
9135 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9136 info->keep_memory);
9137 if (relstart == NULL)
9138 {
9139 free (used);
9140 goto error_ret;
9141 }
9142
9143 /* Mark toc entries referenced as used. */
9144 do
9145 {
9146 repeat = 0;
9147 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9148 {
9149 enum elf_ppc64_reloc_type r_type;
9150 unsigned long r_symndx;
9151 asection *sym_sec;
9152 struct elf_link_hash_entry *h;
9153 Elf_Internal_Sym *sym;
9154 bfd_vma val;
9155 enum {no_check, check_lo, check_ha} insn_check;
9156
9157 r_type = ELF64_R_TYPE (rel->r_info);
9158 switch (r_type)
9159 {
9160 default:
9161 insn_check = no_check;
9162 break;
9163
9164 case R_PPC64_GOT_TLSLD16_HA:
9165 case R_PPC64_GOT_TLSGD16_HA:
9166 case R_PPC64_GOT_TPREL16_HA:
9167 case R_PPC64_GOT_DTPREL16_HA:
9168 case R_PPC64_GOT16_HA:
9169 case R_PPC64_TOC16_HA:
9170 insn_check = check_ha;
9171 break;
9172
9173 case R_PPC64_GOT_TLSLD16_LO:
9174 case R_PPC64_GOT_TLSGD16_LO:
9175 case R_PPC64_GOT_TPREL16_LO_DS:
9176 case R_PPC64_GOT_DTPREL16_LO_DS:
9177 case R_PPC64_GOT16_LO:
9178 case R_PPC64_GOT16_LO_DS:
9179 case R_PPC64_TOC16_LO:
9180 case R_PPC64_TOC16_LO_DS:
9181 insn_check = check_lo;
9182 break;
9183 }
9184
9185 if (insn_check != no_check)
9186 {
9187 bfd_vma off = rel->r_offset & ~3;
9188 unsigned char buf[4];
9189 unsigned int insn;
9190
9191 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9192 {
9193 free (used);
9194 goto error_ret;
9195 }
9196 insn = bfd_get_32 (ibfd, buf);
9197 if (insn_check == check_lo
9198 ? !ok_lo_toc_insn (insn, r_type)
9199 : ((insn & ((0x3f << 26) | 0x1f << 16))
9200 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9201 {
9202 char str[12];
9203
9204 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9205 sprintf (str, "%#08x", insn);
9206 info->callbacks->einfo
9207 /* xgettext:c-format */
9208 (_("%H: toc optimization is not supported for"
9209 " %s instruction.\n"),
9210 ibfd, sec, rel->r_offset & ~3, str);
9211 }
9212 }
9213
9214 switch (r_type)
9215 {
9216 case R_PPC64_TOC16:
9217 case R_PPC64_TOC16_LO:
9218 case R_PPC64_TOC16_HI:
9219 case R_PPC64_TOC16_HA:
9220 case R_PPC64_TOC16_DS:
9221 case R_PPC64_TOC16_LO_DS:
9222 /* In case we're taking addresses of toc entries. */
9223 case R_PPC64_ADDR64:
9224 break;
9225
9226 default:
9227 continue;
9228 }
9229
9230 r_symndx = ELF64_R_SYM (rel->r_info);
9231 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9232 r_symndx, ibfd))
9233 {
9234 free (used);
9235 goto error_ret;
9236 }
9237
9238 if (sym_sec != toc)
9239 continue;
9240
9241 if (h != NULL)
9242 val = h->root.u.def.value;
9243 else
9244 val = sym->st_value;
9245 val += rel->r_addend;
9246
9247 if (val >= toc->size)
9248 continue;
9249
9250 if ((skip[val >> 3] & can_optimize) != 0)
9251 {
9252 bfd_vma off;
9253 unsigned char opc;
9254
9255 switch (r_type)
9256 {
9257 case R_PPC64_TOC16_HA:
9258 break;
9259
9260 case R_PPC64_TOC16_LO_DS:
9261 off = rel->r_offset;
9262 off += (bfd_big_endian (ibfd) ? -2 : 3);
9263 if (!bfd_get_section_contents (ibfd, sec, &opc,
9264 off, 1))
9265 {
9266 free (used);
9267 goto error_ret;
9268 }
9269 if ((opc & (0x3f << 2)) == (58u << 2))
9270 break;
9271 /* Fall through. */
9272
9273 default:
9274 /* Wrong sort of reloc, or not a ld. We may
9275 as well clear ref_from_discarded too. */
9276 skip[val >> 3] = 0;
9277 }
9278 }
9279
9280 if (sec != toc)
9281 used[val >> 3] = 1;
9282 /* For the toc section, we only mark as used if this
9283 entry itself isn't unused. */
9284 else if ((used[rel->r_offset >> 3]
9285 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9286 && !used[val >> 3])
9287 {
9288 /* Do all the relocs again, to catch reference
9289 chains. */
9290 repeat = 1;
9291 used[val >> 3] = 1;
9292 }
9293 }
9294 }
9295 while (repeat);
9296
9297 if (elf_section_data (sec)->relocs != relstart)
9298 free (relstart);
9299 }
9300
9301 /* Merge the used and skip arrays. Assume that TOC
9302 doublewords not appearing as either used or unused belong
9303 to an entry more than one doubleword in size. */
9304 for (drop = skip, keep = used, last = 0, some_unused = 0;
9305 drop < skip + (toc->size + 7) / 8;
9306 ++drop, ++keep)
9307 {
9308 if (*keep)
9309 {
9310 *drop &= ~ref_from_discarded;
9311 if ((*drop & can_optimize) != 0)
9312 some_unused = 1;
9313 last = 0;
9314 }
9315 else if ((*drop & ref_from_discarded) != 0)
9316 {
9317 some_unused = 1;
9318 last = ref_from_discarded;
9319 }
9320 else
9321 *drop = last;
9322 }
9323
9324 free (used);
9325
9326 if (some_unused)
9327 {
9328 bfd_byte *contents, *src;
9329 unsigned long off;
9330 Elf_Internal_Sym *sym;
9331 bfd_boolean local_toc_syms = FALSE;
9332
9333 /* Shuffle the toc contents, and at the same time convert the
9334 skip array from booleans into offsets. */
9335 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9336 goto error_ret;
9337
9338 elf_section_data (toc)->this_hdr.contents = contents;
9339
9340 for (src = contents, off = 0, drop = skip;
9341 src < contents + toc->size;
9342 src += 8, ++drop)
9343 {
9344 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9345 off += 8;
9346 else if (off != 0)
9347 {
9348 *drop = off;
9349 memcpy (src - off, src, 8);
9350 }
9351 }
9352 *drop = off;
9353 toc->rawsize = toc->size;
9354 toc->size = src - contents - off;
9355
9356 /* Adjust addends for relocs against the toc section sym,
9357 and optimize any accesses we can. */
9358 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9359 {
9360 if (sec->reloc_count == 0
9361 || discarded_section (sec))
9362 continue;
9363
9364 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9365 info->keep_memory);
9366 if (relstart == NULL)
9367 goto error_ret;
9368
9369 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9370 {
9371 enum elf_ppc64_reloc_type r_type;
9372 unsigned long r_symndx;
9373 asection *sym_sec;
9374 struct elf_link_hash_entry *h;
9375 bfd_vma val;
9376
9377 r_type = ELF64_R_TYPE (rel->r_info);
9378 switch (r_type)
9379 {
9380 default:
9381 continue;
9382
9383 case R_PPC64_TOC16:
9384 case R_PPC64_TOC16_LO:
9385 case R_PPC64_TOC16_HI:
9386 case R_PPC64_TOC16_HA:
9387 case R_PPC64_TOC16_DS:
9388 case R_PPC64_TOC16_LO_DS:
9389 case R_PPC64_ADDR64:
9390 break;
9391 }
9392
9393 r_symndx = ELF64_R_SYM (rel->r_info);
9394 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9395 r_symndx, ibfd))
9396 goto error_ret;
9397
9398 if (sym_sec != toc)
9399 continue;
9400
9401 if (h != NULL)
9402 val = h->root.u.def.value;
9403 else
9404 {
9405 val = sym->st_value;
9406 if (val != 0)
9407 local_toc_syms = TRUE;
9408 }
9409
9410 val += rel->r_addend;
9411
9412 if (val > toc->rawsize)
9413 val = toc->rawsize;
9414 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9415 continue;
9416 else if ((skip[val >> 3] & can_optimize) != 0)
9417 {
9418 Elf_Internal_Rela *tocrel
9419 = toc_relocs + (skip[val >> 3] >> 2);
9420 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9421
9422 switch (r_type)
9423 {
9424 case R_PPC64_TOC16_HA:
9425 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9426 break;
9427
9428 case R_PPC64_TOC16_LO_DS:
9429 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9430 break;
9431
9432 default:
9433 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9434 ppc_howto_init ();
9435 info->callbacks->einfo
9436 /* xgettext:c-format */
9437 (_("%H: %s references "
9438 "optimized away TOC entry\n"),
9439 ibfd, sec, rel->r_offset,
9440 ppc64_elf_howto_table[r_type]->name);
9441 bfd_set_error (bfd_error_bad_value);
9442 goto error_ret;
9443 }
9444 rel->r_addend = tocrel->r_addend;
9445 elf_section_data (sec)->relocs = relstart;
9446 continue;
9447 }
9448
9449 if (h != NULL || sym->st_value != 0)
9450 continue;
9451
9452 rel->r_addend -= skip[val >> 3];
9453 elf_section_data (sec)->relocs = relstart;
9454 }
9455
9456 if (elf_section_data (sec)->relocs != relstart)
9457 free (relstart);
9458 }
9459
9460 /* We shouldn't have local or global symbols defined in the TOC,
9461 but handle them anyway. */
9462 if (local_syms != NULL)
9463 for (sym = local_syms;
9464 sym < local_syms + symtab_hdr->sh_info;
9465 ++sym)
9466 if (sym->st_value != 0
9467 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9468 {
9469 unsigned long i;
9470
9471 if (sym->st_value > toc->rawsize)
9472 i = toc->rawsize >> 3;
9473 else
9474 i = sym->st_value >> 3;
9475
9476 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9477 {
9478 if (local_toc_syms)
9479 _bfd_error_handler
9480 (_("%s defined on removed toc entry"),
9481 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9482 do
9483 ++i;
9484 while ((skip[i] & (ref_from_discarded | can_optimize)));
9485 sym->st_value = (bfd_vma) i << 3;
9486 }
9487
9488 sym->st_value -= skip[i];
9489 symtab_hdr->contents = (unsigned char *) local_syms;
9490 }
9491
9492 /* Adjust any global syms defined in this toc input section. */
9493 if (toc_inf.global_toc_syms)
9494 {
9495 toc_inf.toc = toc;
9496 toc_inf.skip = skip;
9497 toc_inf.global_toc_syms = FALSE;
9498 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9499 &toc_inf);
9500 }
9501
9502 if (toc->reloc_count != 0)
9503 {
9504 Elf_Internal_Shdr *rel_hdr;
9505 Elf_Internal_Rela *wrel;
9506 bfd_size_type sz;
9507
9508 /* Remove unused toc relocs, and adjust those we keep. */
9509 if (toc_relocs == NULL)
9510 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9511 info->keep_memory);
9512 if (toc_relocs == NULL)
9513 goto error_ret;
9514
9515 wrel = toc_relocs;
9516 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9517 if ((skip[rel->r_offset >> 3]
9518 & (ref_from_discarded | can_optimize)) == 0)
9519 {
9520 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9521 wrel->r_info = rel->r_info;
9522 wrel->r_addend = rel->r_addend;
9523 ++wrel;
9524 }
9525 else if (!dec_dynrel_count (rel->r_info, toc, info,
9526 &local_syms, NULL, NULL))
9527 goto error_ret;
9528
9529 elf_section_data (toc)->relocs = toc_relocs;
9530 toc->reloc_count = wrel - toc_relocs;
9531 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9532 sz = rel_hdr->sh_entsize;
9533 rel_hdr->sh_size = toc->reloc_count * sz;
9534 }
9535 }
9536 else if (toc_relocs != NULL
9537 && elf_section_data (toc)->relocs != toc_relocs)
9538 free (toc_relocs);
9539
9540 if (local_syms != NULL
9541 && symtab_hdr->contents != (unsigned char *) local_syms)
9542 {
9543 if (!info->keep_memory)
9544 free (local_syms);
9545 else
9546 symtab_hdr->contents = (unsigned char *) local_syms;
9547 }
9548 free (skip);
9549 }
9550
9551 return TRUE;
9552 }
9553
9554 /* Return true iff input section I references the TOC using
9555 instructions limited to +/-32k offsets. */
9556
9557 bfd_boolean
9558 ppc64_elf_has_small_toc_reloc (asection *i)
9559 {
9560 return (is_ppc64_elf (i->owner)
9561 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9562 }
9563
9564 /* Allocate space for one GOT entry. */
9565
9566 static void
9567 allocate_got (struct elf_link_hash_entry *h,
9568 struct bfd_link_info *info,
9569 struct got_entry *gent)
9570 {
9571 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9572 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9573 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9574 ? 16 : 8);
9575 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9576 ? 2 : 1) * sizeof (Elf64_External_Rela);
9577 asection *got = ppc64_elf_tdata (gent->owner)->got;
9578
9579 gent->got.offset = got->size;
9580 got->size += entsize;
9581
9582 if (h->type == STT_GNU_IFUNC)
9583 {
9584 htab->elf.irelplt->size += rentsize;
9585 htab->got_reli_size += rentsize;
9586 }
9587 else if (((bfd_link_pic (info)
9588 && !((gent->tls_type & TLS_TPREL) != 0
9589 && bfd_link_executable (info)
9590 && SYMBOL_REFERENCES_LOCAL (info, h)))
9591 || (htab->elf.dynamic_sections_created
9592 && h->dynindx != -1
9593 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9594 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9595 {
9596 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9597 relgot->size += rentsize;
9598 }
9599 }
9600
9601 /* This function merges got entries in the same toc group. */
9602
9603 static void
9604 merge_got_entries (struct got_entry **pent)
9605 {
9606 struct got_entry *ent, *ent2;
9607
9608 for (ent = *pent; ent != NULL; ent = ent->next)
9609 if (!ent->is_indirect)
9610 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9611 if (!ent2->is_indirect
9612 && ent2->addend == ent->addend
9613 && ent2->tls_type == ent->tls_type
9614 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9615 {
9616 ent2->is_indirect = TRUE;
9617 ent2->got.ent = ent;
9618 }
9619 }
9620
9621 /* If H is undefined, make it dynamic if that makes sense. */
9622
9623 static bfd_boolean
9624 ensure_undef_dynamic (struct bfd_link_info *info,
9625 struct elf_link_hash_entry *h)
9626 {
9627 struct elf_link_hash_table *htab = elf_hash_table (info);
9628
9629 if (htab->dynamic_sections_created
9630 && ((info->dynamic_undefined_weak != 0
9631 && h->root.type == bfd_link_hash_undefweak)
9632 || h->root.type == bfd_link_hash_undefined)
9633 && h->dynindx == -1
9634 && !h->forced_local
9635 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9636 return bfd_elf_link_record_dynamic_symbol (info, h);
9637 return TRUE;
9638 }
9639
9640 /* Allocate space in .plt, .got and associated reloc sections for
9641 dynamic relocs. */
9642
9643 static bfd_boolean
9644 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9645 {
9646 struct bfd_link_info *info;
9647 struct ppc_link_hash_table *htab;
9648 asection *s;
9649 struct ppc_link_hash_entry *eh;
9650 struct got_entry **pgent, *gent;
9651
9652 if (h->root.type == bfd_link_hash_indirect)
9653 return TRUE;
9654
9655 info = (struct bfd_link_info *) inf;
9656 htab = ppc_hash_table (info);
9657 if (htab == NULL)
9658 return FALSE;
9659
9660 eh = (struct ppc_link_hash_entry *) h;
9661 /* Run through the TLS GD got entries first if we're changing them
9662 to TPREL. */
9663 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9664 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9665 if (gent->got.refcount > 0
9666 && (gent->tls_type & TLS_GD) != 0)
9667 {
9668 /* This was a GD entry that has been converted to TPREL. If
9669 there happens to be a TPREL entry we can use that one. */
9670 struct got_entry *ent;
9671 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9672 if (ent->got.refcount > 0
9673 && (ent->tls_type & TLS_TPREL) != 0
9674 && ent->addend == gent->addend
9675 && ent->owner == gent->owner)
9676 {
9677 gent->got.refcount = 0;
9678 break;
9679 }
9680
9681 /* If not, then we'll be using our own TPREL entry. */
9682 if (gent->got.refcount != 0)
9683 gent->tls_type = TLS_TLS | TLS_TPREL;
9684 }
9685
9686 /* Remove any list entry that won't generate a word in the GOT before
9687 we call merge_got_entries. Otherwise we risk merging to empty
9688 entries. */
9689 pgent = &h->got.glist;
9690 while ((gent = *pgent) != NULL)
9691 if (gent->got.refcount > 0)
9692 {
9693 if ((gent->tls_type & TLS_LD) != 0
9694 && !h->def_dynamic)
9695 {
9696 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9697 *pgent = gent->next;
9698 }
9699 else
9700 pgent = &gent->next;
9701 }
9702 else
9703 *pgent = gent->next;
9704
9705 if (!htab->do_multi_toc)
9706 merge_got_entries (&h->got.glist);
9707
9708 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9709 if (!gent->is_indirect)
9710 {
9711 /* Make sure this symbol is output as a dynamic symbol. */
9712 if (!ensure_undef_dynamic (info, h))
9713 return FALSE;
9714
9715 if (!is_ppc64_elf (gent->owner))
9716 abort ();
9717
9718 allocate_got (h, info, gent);
9719 }
9720
9721 /* If no dynamic sections we can't have dynamic relocs, except for
9722 IFUNCs which are handled even in static executables. */
9723 if (!htab->elf.dynamic_sections_created
9724 && h->type != STT_GNU_IFUNC)
9725 eh->dyn_relocs = NULL;
9726
9727 /* Also discard relocs on undefined weak syms with non-default
9728 visibility, or when dynamic_undefined_weak says so. */
9729 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9730 eh->dyn_relocs = NULL;
9731
9732 if (eh->dyn_relocs != NULL)
9733 {
9734 struct elf_dyn_relocs *p, **pp;
9735
9736 /* In the shared -Bsymbolic case, discard space allocated for
9737 dynamic pc-relative relocs against symbols which turn out to
9738 be defined in regular objects. For the normal shared case,
9739 discard space for relocs that have become local due to symbol
9740 visibility changes. */
9741
9742 if (bfd_link_pic (info))
9743 {
9744 /* Relocs that use pc_count are those that appear on a call
9745 insn, or certain REL relocs (see must_be_dyn_reloc) that
9746 can be generated via assembly. We want calls to
9747 protected symbols to resolve directly to the function
9748 rather than going via the plt. If people want function
9749 pointer comparisons to work as expected then they should
9750 avoid writing weird assembly. */
9751 if (SYMBOL_CALLS_LOCAL (info, h))
9752 {
9753 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9754 {
9755 p->count -= p->pc_count;
9756 p->pc_count = 0;
9757 if (p->count == 0)
9758 *pp = p->next;
9759 else
9760 pp = &p->next;
9761 }
9762 }
9763
9764 if (eh->dyn_relocs != NULL)
9765 {
9766 /* Make sure this symbol is output as a dynamic symbol. */
9767 if (!ensure_undef_dynamic (info, h))
9768 return FALSE;
9769 }
9770 }
9771 else if (h->type == STT_GNU_IFUNC)
9772 {
9773 /* A plt entry is always created when making direct calls to
9774 an ifunc, even when building a static executable, but
9775 that doesn't cover all cases. We may have only an ifunc
9776 initialised function pointer for a given ifunc symbol.
9777
9778 For ELFv2, dynamic relocations are not required when
9779 generating a global entry PLT stub. */
9780 if (abiversion (info->output_bfd) >= 2)
9781 {
9782 if (global_entry_stub (h))
9783 eh->dyn_relocs = NULL;
9784 }
9785
9786 /* For ELFv1 we have function descriptors. Descriptors need
9787 to be treated like PLT entries and thus have dynamic
9788 relocations. One exception is when the function
9789 descriptor is copied into .dynbss (which should only
9790 happen with ancient versions of gcc). */
9791 else if (h->needs_copy)
9792 eh->dyn_relocs = NULL;
9793 }
9794 else if (ELIMINATE_COPY_RELOCS)
9795 {
9796 /* For the non-pic case, discard space for relocs against
9797 symbols which turn out to need copy relocs or are not
9798 dynamic. */
9799 if (!h->non_got_ref
9800 && !h->def_regular)
9801 {
9802 /* Make sure this symbol is output as a dynamic symbol. */
9803 if (!ensure_undef_dynamic (info, h))
9804 return FALSE;
9805
9806 if (h->dynindx == -1)
9807 eh->dyn_relocs = NULL;
9808 }
9809 else
9810 eh->dyn_relocs = NULL;
9811 }
9812
9813 /* Finally, allocate space. */
9814 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9815 {
9816 asection *sreloc = elf_section_data (p->sec)->sreloc;
9817 if (eh->elf.type == STT_GNU_IFUNC)
9818 sreloc = htab->elf.irelplt;
9819 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9820 }
9821 }
9822
9823 if ((htab->elf.dynamic_sections_created
9824 && h->dynindx != -1)
9825 || h->type == STT_GNU_IFUNC)
9826 {
9827 struct plt_entry *pent;
9828 bfd_boolean doneone = FALSE;
9829 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9830 if (pent->plt.refcount > 0)
9831 {
9832 if (!htab->elf.dynamic_sections_created
9833 || h->dynindx == -1)
9834 {
9835 s = htab->elf.iplt;
9836 pent->plt.offset = s->size;
9837 s->size += PLT_ENTRY_SIZE (htab);
9838 s = htab->elf.irelplt;
9839 }
9840 else
9841 {
9842 /* If this is the first .plt entry, make room for the special
9843 first entry. */
9844 s = htab->elf.splt;
9845 if (s->size == 0)
9846 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9847
9848 pent->plt.offset = s->size;
9849
9850 /* Make room for this entry. */
9851 s->size += PLT_ENTRY_SIZE (htab);
9852
9853 /* Make room for the .glink code. */
9854 s = htab->glink;
9855 if (s->size == 0)
9856 s->size += GLINK_CALL_STUB_SIZE;
9857 if (htab->opd_abi)
9858 {
9859 /* We need bigger stubs past index 32767. */
9860 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9861 s->size += 4;
9862 s->size += 2*4;
9863 }
9864 else
9865 s->size += 4;
9866
9867 /* We also need to make an entry in the .rela.plt section. */
9868 s = htab->elf.srelplt;
9869 }
9870 s->size += sizeof (Elf64_External_Rela);
9871 doneone = TRUE;
9872 }
9873 else
9874 pent->plt.offset = (bfd_vma) -1;
9875 if (!doneone)
9876 {
9877 h->plt.plist = NULL;
9878 h->needs_plt = 0;
9879 }
9880 }
9881 else
9882 {
9883 h->plt.plist = NULL;
9884 h->needs_plt = 0;
9885 }
9886
9887 return TRUE;
9888 }
9889
9890 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9891 to set up space for global entry stubs. These are put in glink,
9892 after the branch table. */
9893
9894 static bfd_boolean
9895 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9896 {
9897 struct bfd_link_info *info;
9898 struct ppc_link_hash_table *htab;
9899 struct plt_entry *pent;
9900 asection *s;
9901
9902 if (h->root.type == bfd_link_hash_indirect)
9903 return TRUE;
9904
9905 if (!h->pointer_equality_needed)
9906 return TRUE;
9907
9908 if (h->def_regular)
9909 return TRUE;
9910
9911 info = inf;
9912 htab = ppc_hash_table (info);
9913 if (htab == NULL)
9914 return FALSE;
9915
9916 s = htab->glink;
9917 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9918 if (pent->plt.offset != (bfd_vma) -1
9919 && pent->addend == 0)
9920 {
9921 /* For ELFv2, if this symbol is not defined in a regular file
9922 and we are not generating a shared library or pie, then we
9923 need to define the symbol in the executable on a call stub.
9924 This is to avoid text relocations. */
9925 s->size = (s->size + 15) & -16;
9926 h->root.type = bfd_link_hash_defined;
9927 h->root.u.def.section = s;
9928 h->root.u.def.value = s->size;
9929 s->size += 16;
9930 break;
9931 }
9932 return TRUE;
9933 }
9934
9935 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9936 read-only sections. */
9937
9938 static bfd_boolean
9939 maybe_set_textrel (struct elf_link_hash_entry *h, void *inf)
9940 {
9941 asection *sec;
9942
9943 if (h->root.type == bfd_link_hash_indirect)
9944 return TRUE;
9945
9946 sec = readonly_dynrelocs (h);
9947 if (sec != NULL)
9948 {
9949 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9950
9951 info->flags |= DF_TEXTREL;
9952 info->callbacks->minfo
9953 (_("%B: dynamic relocation in read-only section `%A'\n"),
9954 sec->owner, sec);
9955
9956 /* Not an error, just cut short the traversal. */
9957 return FALSE;
9958 }
9959 return TRUE;
9960 }
9961
9962 /* Set the sizes of the dynamic sections. */
9963
9964 static bfd_boolean
9965 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9966 struct bfd_link_info *info)
9967 {
9968 struct ppc_link_hash_table *htab;
9969 bfd *dynobj;
9970 asection *s;
9971 bfd_boolean relocs;
9972 bfd *ibfd;
9973 struct got_entry *first_tlsld;
9974
9975 htab = ppc_hash_table (info);
9976 if (htab == NULL)
9977 return FALSE;
9978
9979 dynobj = htab->elf.dynobj;
9980 if (dynobj == NULL)
9981 abort ();
9982
9983 if (htab->elf.dynamic_sections_created)
9984 {
9985 /* Set the contents of the .interp section to the interpreter. */
9986 if (bfd_link_executable (info) && !info->nointerp)
9987 {
9988 s = bfd_get_linker_section (dynobj, ".interp");
9989 if (s == NULL)
9990 abort ();
9991 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9992 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9993 }
9994 }
9995
9996 /* Set up .got offsets for local syms, and space for local dynamic
9997 relocs. */
9998 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9999 {
10000 struct got_entry **lgot_ents;
10001 struct got_entry **end_lgot_ents;
10002 struct plt_entry **local_plt;
10003 struct plt_entry **end_local_plt;
10004 unsigned char *lgot_masks;
10005 bfd_size_type locsymcount;
10006 Elf_Internal_Shdr *symtab_hdr;
10007
10008 if (!is_ppc64_elf (ibfd))
10009 continue;
10010
10011 for (s = ibfd->sections; s != NULL; s = s->next)
10012 {
10013 struct ppc_dyn_relocs *p;
10014
10015 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10016 {
10017 if (!bfd_is_abs_section (p->sec)
10018 && bfd_is_abs_section (p->sec->output_section))
10019 {
10020 /* Input section has been discarded, either because
10021 it is a copy of a linkonce section or due to
10022 linker script /DISCARD/, so we'll be discarding
10023 the relocs too. */
10024 }
10025 else if (p->count != 0)
10026 {
10027 asection *srel = elf_section_data (p->sec)->sreloc;
10028 if (p->ifunc)
10029 srel = htab->elf.irelplt;
10030 srel->size += p->count * sizeof (Elf64_External_Rela);
10031 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10032 info->flags |= DF_TEXTREL;
10033 }
10034 }
10035 }
10036
10037 lgot_ents = elf_local_got_ents (ibfd);
10038 if (!lgot_ents)
10039 continue;
10040
10041 symtab_hdr = &elf_symtab_hdr (ibfd);
10042 locsymcount = symtab_hdr->sh_info;
10043 end_lgot_ents = lgot_ents + locsymcount;
10044 local_plt = (struct plt_entry **) end_lgot_ents;
10045 end_local_plt = local_plt + locsymcount;
10046 lgot_masks = (unsigned char *) end_local_plt;
10047 s = ppc64_elf_tdata (ibfd)->got;
10048 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10049 {
10050 struct got_entry **pent, *ent;
10051
10052 pent = lgot_ents;
10053 while ((ent = *pent) != NULL)
10054 if (ent->got.refcount > 0)
10055 {
10056 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10057 {
10058 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10059 *pent = ent->next;
10060 }
10061 else
10062 {
10063 unsigned int ent_size = 8;
10064 unsigned int rel_size = sizeof (Elf64_External_Rela);
10065
10066 ent->got.offset = s->size;
10067 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10068 {
10069 ent_size *= 2;
10070 rel_size *= 2;
10071 }
10072 s->size += ent_size;
10073 if ((*lgot_masks & PLT_IFUNC) != 0)
10074 {
10075 htab->elf.irelplt->size += rel_size;
10076 htab->got_reli_size += rel_size;
10077 }
10078 else if (bfd_link_pic (info)
10079 && !((ent->tls_type & TLS_TPREL) != 0
10080 && bfd_link_executable (info)))
10081 {
10082 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10083 srel->size += rel_size;
10084 }
10085 pent = &ent->next;
10086 }
10087 }
10088 else
10089 *pent = ent->next;
10090 }
10091
10092 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10093 for (; local_plt < end_local_plt; ++local_plt)
10094 {
10095 struct plt_entry *ent;
10096
10097 for (ent = *local_plt; ent != NULL; ent = ent->next)
10098 if (ent->plt.refcount > 0)
10099 {
10100 s = htab->elf.iplt;
10101 ent->plt.offset = s->size;
10102 s->size += PLT_ENTRY_SIZE (htab);
10103
10104 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10105 }
10106 else
10107 ent->plt.offset = (bfd_vma) -1;
10108 }
10109 }
10110
10111 /* Allocate global sym .plt and .got entries, and space for global
10112 sym dynamic relocs. */
10113 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10114 /* Stash the end of glink branch table. */
10115 if (htab->glink != NULL)
10116 htab->glink->rawsize = htab->glink->size;
10117
10118 if (!htab->opd_abi && !bfd_link_pic (info))
10119 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10120
10121 first_tlsld = NULL;
10122 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10123 {
10124 struct got_entry *ent;
10125
10126 if (!is_ppc64_elf (ibfd))
10127 continue;
10128
10129 ent = ppc64_tlsld_got (ibfd);
10130 if (ent->got.refcount > 0)
10131 {
10132 if (!htab->do_multi_toc && first_tlsld != NULL)
10133 {
10134 ent->is_indirect = TRUE;
10135 ent->got.ent = first_tlsld;
10136 }
10137 else
10138 {
10139 if (first_tlsld == NULL)
10140 first_tlsld = ent;
10141 s = ppc64_elf_tdata (ibfd)->got;
10142 ent->got.offset = s->size;
10143 ent->owner = ibfd;
10144 s->size += 16;
10145 if (bfd_link_pic (info))
10146 {
10147 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10148 srel->size += sizeof (Elf64_External_Rela);
10149 }
10150 }
10151 }
10152 else
10153 ent->got.offset = (bfd_vma) -1;
10154 }
10155
10156 /* We now have determined the sizes of the various dynamic sections.
10157 Allocate memory for them. */
10158 relocs = FALSE;
10159 for (s = dynobj->sections; s != NULL; s = s->next)
10160 {
10161 if ((s->flags & SEC_LINKER_CREATED) == 0)
10162 continue;
10163
10164 if (s == htab->brlt || s == htab->relbrlt)
10165 /* These haven't been allocated yet; don't strip. */
10166 continue;
10167 else if (s == htab->elf.sgot
10168 || s == htab->elf.splt
10169 || s == htab->elf.iplt
10170 || s == htab->glink
10171 || s == htab->elf.sdynbss
10172 || s == htab->elf.sdynrelro)
10173 {
10174 /* Strip this section if we don't need it; see the
10175 comment below. */
10176 }
10177 else if (s == htab->glink_eh_frame)
10178 {
10179 if (!bfd_is_abs_section (s->output_section))
10180 /* Not sized yet. */
10181 continue;
10182 }
10183 else if (CONST_STRNEQ (s->name, ".rela"))
10184 {
10185 if (s->size != 0)
10186 {
10187 if (s != htab->elf.srelplt)
10188 relocs = TRUE;
10189
10190 /* We use the reloc_count field as a counter if we need
10191 to copy relocs into the output file. */
10192 s->reloc_count = 0;
10193 }
10194 }
10195 else
10196 {
10197 /* It's not one of our sections, so don't allocate space. */
10198 continue;
10199 }
10200
10201 if (s->size == 0)
10202 {
10203 /* If we don't need this section, strip it from the
10204 output file. This is mostly to handle .rela.bss and
10205 .rela.plt. We must create both sections in
10206 create_dynamic_sections, because they must be created
10207 before the linker maps input sections to output
10208 sections. The linker does that before
10209 adjust_dynamic_symbol is called, and it is that
10210 function which decides whether anything needs to go
10211 into these sections. */
10212 s->flags |= SEC_EXCLUDE;
10213 continue;
10214 }
10215
10216 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10217 continue;
10218
10219 /* Allocate memory for the section contents. We use bfd_zalloc
10220 here in case unused entries are not reclaimed before the
10221 section's contents are written out. This should not happen,
10222 but this way if it does we get a R_PPC64_NONE reloc in .rela
10223 sections instead of garbage.
10224 We also rely on the section contents being zero when writing
10225 the GOT and .dynrelro. */
10226 s->contents = bfd_zalloc (dynobj, s->size);
10227 if (s->contents == NULL)
10228 return FALSE;
10229 }
10230
10231 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10232 {
10233 if (!is_ppc64_elf (ibfd))
10234 continue;
10235
10236 s = ppc64_elf_tdata (ibfd)->got;
10237 if (s != NULL && s != htab->elf.sgot)
10238 {
10239 if (s->size == 0)
10240 s->flags |= SEC_EXCLUDE;
10241 else
10242 {
10243 s->contents = bfd_zalloc (ibfd, s->size);
10244 if (s->contents == NULL)
10245 return FALSE;
10246 }
10247 }
10248 s = ppc64_elf_tdata (ibfd)->relgot;
10249 if (s != NULL)
10250 {
10251 if (s->size == 0)
10252 s->flags |= SEC_EXCLUDE;
10253 else
10254 {
10255 s->contents = bfd_zalloc (ibfd, s->size);
10256 if (s->contents == NULL)
10257 return FALSE;
10258 relocs = TRUE;
10259 s->reloc_count = 0;
10260 }
10261 }
10262 }
10263
10264 if (htab->elf.dynamic_sections_created)
10265 {
10266 bfd_boolean tls_opt;
10267
10268 /* Add some entries to the .dynamic section. We fill in the
10269 values later, in ppc64_elf_finish_dynamic_sections, but we
10270 must add the entries now so that we get the correct size for
10271 the .dynamic section. The DT_DEBUG entry is filled in by the
10272 dynamic linker and used by the debugger. */
10273 #define add_dynamic_entry(TAG, VAL) \
10274 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10275
10276 if (bfd_link_executable (info))
10277 {
10278 if (!add_dynamic_entry (DT_DEBUG, 0))
10279 return FALSE;
10280 }
10281
10282 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10283 {
10284 if (!add_dynamic_entry (DT_PLTGOT, 0)
10285 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10286 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10287 || !add_dynamic_entry (DT_JMPREL, 0)
10288 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10289 return FALSE;
10290 }
10291
10292 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10293 {
10294 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10295 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10296 return FALSE;
10297 }
10298
10299 tls_opt = (htab->params->tls_get_addr_opt
10300 && htab->tls_get_addr_fd != NULL
10301 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10302 if (tls_opt || !htab->opd_abi)
10303 {
10304 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10305 return FALSE;
10306 }
10307
10308 if (relocs)
10309 {
10310 if (!add_dynamic_entry (DT_RELA, 0)
10311 || !add_dynamic_entry (DT_RELASZ, 0)
10312 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10313 return FALSE;
10314
10315 /* If any dynamic relocs apply to a read-only section,
10316 then we need a DT_TEXTREL entry. */
10317 if ((info->flags & DF_TEXTREL) == 0)
10318 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10319
10320 if ((info->flags & DF_TEXTREL) != 0)
10321 {
10322 if (!add_dynamic_entry (DT_TEXTREL, 0))
10323 return FALSE;
10324 }
10325 }
10326 }
10327 #undef add_dynamic_entry
10328
10329 return TRUE;
10330 }
10331
10332 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10333
10334 static bfd_boolean
10335 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10336 {
10337 if (h->plt.plist != NULL
10338 && !h->def_regular
10339 && !h->pointer_equality_needed)
10340 return FALSE;
10341
10342 return _bfd_elf_hash_symbol (h);
10343 }
10344
10345 /* Determine the type of stub needed, if any, for a call. */
10346
10347 static inline enum ppc_stub_type
10348 ppc_type_of_stub (asection *input_sec,
10349 const Elf_Internal_Rela *rel,
10350 struct ppc_link_hash_entry **hash,
10351 struct plt_entry **plt_ent,
10352 bfd_vma destination,
10353 unsigned long local_off)
10354 {
10355 struct ppc_link_hash_entry *h = *hash;
10356 bfd_vma location;
10357 bfd_vma branch_offset;
10358 bfd_vma max_branch_offset;
10359 enum elf_ppc64_reloc_type r_type;
10360
10361 if (h != NULL)
10362 {
10363 struct plt_entry *ent;
10364 struct ppc_link_hash_entry *fdh = h;
10365 if (h->oh != NULL
10366 && h->oh->is_func_descriptor)
10367 {
10368 fdh = ppc_follow_link (h->oh);
10369 *hash = fdh;
10370 }
10371
10372 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10373 if (ent->addend == rel->r_addend
10374 && ent->plt.offset != (bfd_vma) -1)
10375 {
10376 *plt_ent = ent;
10377 return ppc_stub_plt_call;
10378 }
10379
10380 /* Here, we know we don't have a plt entry. If we don't have a
10381 either a defined function descriptor or a defined entry symbol
10382 in a regular object file, then it is pointless trying to make
10383 any other type of stub. */
10384 if (!is_static_defined (&fdh->elf)
10385 && !is_static_defined (&h->elf))
10386 return ppc_stub_none;
10387 }
10388 else if (elf_local_got_ents (input_sec->owner) != NULL)
10389 {
10390 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10391 struct plt_entry **local_plt = (struct plt_entry **)
10392 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10393 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10394
10395 if (local_plt[r_symndx] != NULL)
10396 {
10397 struct plt_entry *ent;
10398
10399 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10400 if (ent->addend == rel->r_addend
10401 && ent->plt.offset != (bfd_vma) -1)
10402 {
10403 *plt_ent = ent;
10404 return ppc_stub_plt_call;
10405 }
10406 }
10407 }
10408
10409 /* Determine where the call point is. */
10410 location = (input_sec->output_offset
10411 + input_sec->output_section->vma
10412 + rel->r_offset);
10413
10414 branch_offset = destination - location;
10415 r_type = ELF64_R_TYPE (rel->r_info);
10416
10417 /* Determine if a long branch stub is needed. */
10418 max_branch_offset = 1 << 25;
10419 if (r_type != R_PPC64_REL24)
10420 max_branch_offset = 1 << 15;
10421
10422 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10423 /* We need a stub. Figure out whether a long_branch or plt_branch
10424 is needed later. */
10425 return ppc_stub_long_branch;
10426
10427 return ppc_stub_none;
10428 }
10429
10430 /* With power7 weakly ordered memory model, it is possible for ld.so
10431 to update a plt entry in one thread and have another thread see a
10432 stale zero toc entry. To avoid this we need some sort of acquire
10433 barrier in the call stub. One solution is to make the load of the
10434 toc word seem to appear to depend on the load of the function entry
10435 word. Another solution is to test for r2 being zero, and branch to
10436 the appropriate glink entry if so.
10437
10438 . fake dep barrier compare
10439 . ld 12,xxx(2) ld 12,xxx(2)
10440 . mtctr 12 mtctr 12
10441 . xor 11,12,12 ld 2,xxx+8(2)
10442 . add 2,2,11 cmpldi 2,0
10443 . ld 2,xxx+8(2) bnectr+
10444 . bctr b <glink_entry>
10445
10446 The solution involving the compare turns out to be faster, so
10447 that's what we use unless the branch won't reach. */
10448
10449 #define ALWAYS_USE_FAKE_DEP 0
10450 #define ALWAYS_EMIT_R2SAVE 0
10451
10452 #define PPC_LO(v) ((v) & 0xffff)
10453 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10454 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10455
10456 static inline unsigned int
10457 plt_stub_size (struct ppc_link_hash_table *htab,
10458 struct ppc_stub_hash_entry *stub_entry,
10459 bfd_vma off)
10460 {
10461 unsigned size = 12;
10462
10463 if (ALWAYS_EMIT_R2SAVE
10464 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10465 size += 4;
10466 if (PPC_HA (off) != 0)
10467 size += 4;
10468 if (htab->opd_abi)
10469 {
10470 size += 4;
10471 if (htab->params->plt_static_chain)
10472 size += 4;
10473 if (htab->params->plt_thread_safe
10474 && htab->elf.dynamic_sections_created
10475 && stub_entry->h != NULL
10476 && stub_entry->h->elf.dynindx != -1)
10477 size += 8;
10478 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10479 size += 4;
10480 }
10481 if (stub_entry->h != NULL
10482 && (stub_entry->h == htab->tls_get_addr_fd
10483 || stub_entry->h == htab->tls_get_addr)
10484 && htab->params->tls_get_addr_opt)
10485 {
10486 size += 7 * 4;
10487 if (ALWAYS_EMIT_R2SAVE
10488 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10489 size += 6 * 4;
10490 }
10491 return size;
10492 }
10493
10494 /* Depending on the sign of plt_stub_align:
10495 If positive, return the padding to align to a 2**plt_stub_align
10496 boundary.
10497 If negative, if this stub would cross fewer 2**plt_stub_align
10498 boundaries if we align, then return the padding needed to do so. */
10499
10500 static inline unsigned int
10501 plt_stub_pad (struct ppc_link_hash_table *htab,
10502 struct ppc_stub_hash_entry *stub_entry,
10503 bfd_vma plt_off)
10504 {
10505 int stub_align;
10506 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10507 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10508
10509 if (htab->params->plt_stub_align >= 0)
10510 {
10511 stub_align = 1 << htab->params->plt_stub_align;
10512 if ((stub_off & (stub_align - 1)) != 0)
10513 return stub_align - (stub_off & (stub_align - 1));
10514 return 0;
10515 }
10516
10517 stub_align = 1 << -htab->params->plt_stub_align;
10518 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10519 > ((stub_size - 1) & -stub_align))
10520 return stub_align - (stub_off & (stub_align - 1));
10521 return 0;
10522 }
10523
10524 /* Build a .plt call stub. */
10525
10526 static inline bfd_byte *
10527 build_plt_stub (struct ppc_link_hash_table *htab,
10528 struct ppc_stub_hash_entry *stub_entry,
10529 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10530 {
10531 bfd *obfd = htab->params->stub_bfd;
10532 bfd_boolean plt_load_toc = htab->opd_abi;
10533 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10534 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10535 && htab->elf.dynamic_sections_created
10536 && stub_entry->h != NULL
10537 && stub_entry->h->elf.dynindx != -1);
10538 bfd_boolean use_fake_dep = plt_thread_safe;
10539 bfd_vma cmp_branch_off = 0;
10540
10541 if (!ALWAYS_USE_FAKE_DEP
10542 && plt_load_toc
10543 && plt_thread_safe
10544 && !((stub_entry->h == htab->tls_get_addr_fd
10545 || stub_entry->h == htab->tls_get_addr)
10546 && htab->params->tls_get_addr_opt))
10547 {
10548 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10549 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10550 / PLT_ENTRY_SIZE (htab));
10551 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10552 bfd_vma to, from;
10553
10554 if (pltindex > 32768)
10555 glinkoff += (pltindex - 32768) * 4;
10556 to = (glinkoff
10557 + htab->glink->output_offset
10558 + htab->glink->output_section->vma);
10559 from = (p - stub_entry->group->stub_sec->contents
10560 + 4 * (ALWAYS_EMIT_R2SAVE
10561 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10562 + 4 * (PPC_HA (offset) != 0)
10563 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10564 != PPC_HA (offset))
10565 + 4 * (plt_static_chain != 0)
10566 + 20
10567 + stub_entry->group->stub_sec->output_offset
10568 + stub_entry->group->stub_sec->output_section->vma);
10569 cmp_branch_off = to - from;
10570 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10571 }
10572
10573 if (PPC_HA (offset) != 0)
10574 {
10575 if (r != NULL)
10576 {
10577 if (ALWAYS_EMIT_R2SAVE
10578 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10579 r[0].r_offset += 4;
10580 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10581 r[1].r_offset = r[0].r_offset + 4;
10582 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10583 r[1].r_addend = r[0].r_addend;
10584 if (plt_load_toc)
10585 {
10586 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10587 {
10588 r[2].r_offset = r[1].r_offset + 4;
10589 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10590 r[2].r_addend = r[0].r_addend;
10591 }
10592 else
10593 {
10594 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10595 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10596 r[2].r_addend = r[0].r_addend + 8;
10597 if (plt_static_chain)
10598 {
10599 r[3].r_offset = r[2].r_offset + 4;
10600 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10601 r[3].r_addend = r[0].r_addend + 16;
10602 }
10603 }
10604 }
10605 }
10606 if (ALWAYS_EMIT_R2SAVE
10607 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10608 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10609 if (plt_load_toc)
10610 {
10611 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10612 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10613 }
10614 else
10615 {
10616 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10617 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10618 }
10619 if (plt_load_toc
10620 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10621 {
10622 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10623 offset = 0;
10624 }
10625 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10626 if (plt_load_toc)
10627 {
10628 if (use_fake_dep)
10629 {
10630 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10631 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10632 }
10633 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10634 if (plt_static_chain)
10635 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10636 }
10637 }
10638 else
10639 {
10640 if (r != NULL)
10641 {
10642 if (ALWAYS_EMIT_R2SAVE
10643 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10644 r[0].r_offset += 4;
10645 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10646 if (plt_load_toc)
10647 {
10648 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10649 {
10650 r[1].r_offset = r[0].r_offset + 4;
10651 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10652 r[1].r_addend = r[0].r_addend;
10653 }
10654 else
10655 {
10656 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10657 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10658 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10659 if (plt_static_chain)
10660 {
10661 r[2].r_offset = r[1].r_offset + 4;
10662 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10663 r[2].r_addend = r[0].r_addend + 8;
10664 }
10665 }
10666 }
10667 }
10668 if (ALWAYS_EMIT_R2SAVE
10669 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10670 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10671 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10672 if (plt_load_toc
10673 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10674 {
10675 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10676 offset = 0;
10677 }
10678 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10679 if (plt_load_toc)
10680 {
10681 if (use_fake_dep)
10682 {
10683 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10684 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10685 }
10686 if (plt_static_chain)
10687 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10688 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10689 }
10690 }
10691 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10692 {
10693 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10694 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10695 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10696 }
10697 else
10698 bfd_put_32 (obfd, BCTR, p), p += 4;
10699 return p;
10700 }
10701
10702 /* Build a special .plt call stub for __tls_get_addr. */
10703
10704 #define LD_R11_0R3 0xe9630000
10705 #define LD_R12_0R3 0xe9830000
10706 #define MR_R0_R3 0x7c601b78
10707 #define CMPDI_R11_0 0x2c2b0000
10708 #define ADD_R3_R12_R13 0x7c6c6a14
10709 #define BEQLR 0x4d820020
10710 #define MR_R3_R0 0x7c030378
10711 #define STD_R11_0R1 0xf9610000
10712 #define BCTRL 0x4e800421
10713 #define LD_R11_0R1 0xe9610000
10714 #define MTLR_R11 0x7d6803a6
10715
10716 static inline bfd_byte *
10717 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10718 struct ppc_stub_hash_entry *stub_entry,
10719 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10720 {
10721 bfd *obfd = htab->params->stub_bfd;
10722
10723 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10724 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10725 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10726 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10727 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10728 bfd_put_32 (obfd, BEQLR, p), p += 4;
10729 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10730 if (r != NULL)
10731 r[0].r_offset += 7 * 4;
10732 if (!ALWAYS_EMIT_R2SAVE
10733 && stub_entry->stub_type != ppc_stub_plt_call_r2save)
10734 return build_plt_stub (htab, stub_entry, p, offset, r);
10735
10736 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10737 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10738
10739 if (r != NULL)
10740 r[0].r_offset += 2 * 4;
10741 p = build_plt_stub (htab, stub_entry, p, offset, r);
10742 bfd_put_32 (obfd, BCTRL, p - 4);
10743
10744 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10745 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10746 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10747 bfd_put_32 (obfd, BLR, p), p += 4;
10748
10749 return p;
10750 }
10751
10752 static Elf_Internal_Rela *
10753 get_relocs (asection *sec, int count)
10754 {
10755 Elf_Internal_Rela *relocs;
10756 struct bfd_elf_section_data *elfsec_data;
10757
10758 elfsec_data = elf_section_data (sec);
10759 relocs = elfsec_data->relocs;
10760 if (relocs == NULL)
10761 {
10762 bfd_size_type relsize;
10763 relsize = sec->reloc_count * sizeof (*relocs);
10764 relocs = bfd_alloc (sec->owner, relsize);
10765 if (relocs == NULL)
10766 return NULL;
10767 elfsec_data->relocs = relocs;
10768 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10769 sizeof (Elf_Internal_Shdr));
10770 if (elfsec_data->rela.hdr == NULL)
10771 return NULL;
10772 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10773 * sizeof (Elf64_External_Rela));
10774 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10775 sec->reloc_count = 0;
10776 }
10777 relocs += sec->reloc_count;
10778 sec->reloc_count += count;
10779 return relocs;
10780 }
10781
10782 static bfd_vma
10783 get_r2off (struct bfd_link_info *info,
10784 struct ppc_stub_hash_entry *stub_entry)
10785 {
10786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10787 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10788
10789 if (r2off == 0)
10790 {
10791 /* Support linking -R objects. Get the toc pointer from the
10792 opd entry. */
10793 char buf[8];
10794 if (!htab->opd_abi)
10795 return r2off;
10796 asection *opd = stub_entry->h->elf.root.u.def.section;
10797 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10798
10799 if (strcmp (opd->name, ".opd") != 0
10800 || opd->reloc_count != 0)
10801 {
10802 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10803 stub_entry->h->elf.root.root.string);
10804 bfd_set_error (bfd_error_bad_value);
10805 return (bfd_vma) -1;
10806 }
10807 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10808 return (bfd_vma) -1;
10809 r2off = bfd_get_64 (opd->owner, buf);
10810 r2off -= elf_gp (info->output_bfd);
10811 }
10812 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10813 return r2off;
10814 }
10815
10816 static bfd_boolean
10817 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10818 {
10819 struct ppc_stub_hash_entry *stub_entry;
10820 struct ppc_branch_hash_entry *br_entry;
10821 struct bfd_link_info *info;
10822 struct ppc_link_hash_table *htab;
10823 bfd_byte *loc;
10824 bfd_byte *p;
10825 bfd_vma dest, off;
10826 int size;
10827 Elf_Internal_Rela *r;
10828 asection *plt;
10829
10830 /* Massage our args to the form they really have. */
10831 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10832 info = in_arg;
10833
10834 htab = ppc_hash_table (info);
10835 if (htab == NULL)
10836 return FALSE;
10837
10838 /* Make a note of the offset within the stubs for this entry. */
10839 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10840 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10841
10842 htab->stub_count[stub_entry->stub_type - 1] += 1;
10843 switch (stub_entry->stub_type)
10844 {
10845 case ppc_stub_long_branch:
10846 case ppc_stub_long_branch_r2off:
10847 /* Branches are relative. This is where we are going to. */
10848 dest = (stub_entry->target_value
10849 + stub_entry->target_section->output_offset
10850 + stub_entry->target_section->output_section->vma);
10851 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10852 off = dest;
10853
10854 /* And this is where we are coming from. */
10855 off -= (stub_entry->stub_offset
10856 + stub_entry->group->stub_sec->output_offset
10857 + stub_entry->group->stub_sec->output_section->vma);
10858
10859 size = 4;
10860 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10861 {
10862 bfd_vma r2off = get_r2off (info, stub_entry);
10863
10864 if (r2off == (bfd_vma) -1)
10865 {
10866 htab->stub_error = TRUE;
10867 return FALSE;
10868 }
10869 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10870 loc += 4;
10871 size = 8;
10872 if (PPC_HA (r2off) != 0)
10873 {
10874 bfd_put_32 (htab->params->stub_bfd,
10875 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10876 loc += 4;
10877 size += 4;
10878 }
10879 if (PPC_LO (r2off) != 0)
10880 {
10881 bfd_put_32 (htab->params->stub_bfd,
10882 ADDI_R2_R2 | PPC_LO (r2off), loc);
10883 loc += 4;
10884 size += 4;
10885 }
10886 off -= size - 4;
10887 }
10888 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10889
10890 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10891 {
10892 info->callbacks->einfo
10893 (_("%P: long branch stub `%s' offset overflow\n"),
10894 stub_entry->root.string);
10895 htab->stub_error = TRUE;
10896 return FALSE;
10897 }
10898
10899 if (info->emitrelocations)
10900 {
10901 r = get_relocs (stub_entry->group->stub_sec, 1);
10902 if (r == NULL)
10903 return FALSE;
10904 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10905 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10906 r->r_addend = dest;
10907 if (stub_entry->h != NULL)
10908 {
10909 struct elf_link_hash_entry **hashes;
10910 unsigned long symndx;
10911 struct ppc_link_hash_entry *h;
10912
10913 hashes = elf_sym_hashes (htab->params->stub_bfd);
10914 if (hashes == NULL)
10915 {
10916 bfd_size_type hsize;
10917
10918 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10919 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10920 if (hashes == NULL)
10921 return FALSE;
10922 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10923 htab->stub_globals = 1;
10924 }
10925 symndx = htab->stub_globals++;
10926 h = stub_entry->h;
10927 hashes[symndx] = &h->elf;
10928 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10929 if (h->oh != NULL && h->oh->is_func)
10930 h = ppc_follow_link (h->oh);
10931 if (h->elf.root.u.def.section != stub_entry->target_section)
10932 /* H is an opd symbol. The addend must be zero. */
10933 r->r_addend = 0;
10934 else
10935 {
10936 off = (h->elf.root.u.def.value
10937 + h->elf.root.u.def.section->output_offset
10938 + h->elf.root.u.def.section->output_section->vma);
10939 r->r_addend -= off;
10940 }
10941 }
10942 }
10943 break;
10944
10945 case ppc_stub_plt_branch:
10946 case ppc_stub_plt_branch_r2off:
10947 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10948 stub_entry->root.string + 9,
10949 FALSE, FALSE);
10950 if (br_entry == NULL)
10951 {
10952 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10953 stub_entry->root.string);
10954 htab->stub_error = TRUE;
10955 return FALSE;
10956 }
10957
10958 dest = (stub_entry->target_value
10959 + stub_entry->target_section->output_offset
10960 + stub_entry->target_section->output_section->vma);
10961 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10962 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10963
10964 bfd_put_64 (htab->brlt->owner, dest,
10965 htab->brlt->contents + br_entry->offset);
10966
10967 if (br_entry->iter == htab->stub_iteration)
10968 {
10969 br_entry->iter = 0;
10970
10971 if (htab->relbrlt != NULL)
10972 {
10973 /* Create a reloc for the branch lookup table entry. */
10974 Elf_Internal_Rela rela;
10975 bfd_byte *rl;
10976
10977 rela.r_offset = (br_entry->offset
10978 + htab->brlt->output_offset
10979 + htab->brlt->output_section->vma);
10980 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10981 rela.r_addend = dest;
10982
10983 rl = htab->relbrlt->contents;
10984 rl += (htab->relbrlt->reloc_count++
10985 * sizeof (Elf64_External_Rela));
10986 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10987 }
10988 else if (info->emitrelocations)
10989 {
10990 r = get_relocs (htab->brlt, 1);
10991 if (r == NULL)
10992 return FALSE;
10993 /* brlt, being SEC_LINKER_CREATED does not go through the
10994 normal reloc processing. Symbols and offsets are not
10995 translated from input file to output file form, so
10996 set up the offset per the output file. */
10997 r->r_offset = (br_entry->offset
10998 + htab->brlt->output_offset
10999 + htab->brlt->output_section->vma);
11000 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11001 r->r_addend = dest;
11002 }
11003 }
11004
11005 dest = (br_entry->offset
11006 + htab->brlt->output_offset
11007 + htab->brlt->output_section->vma);
11008
11009 off = (dest
11010 - elf_gp (htab->brlt->output_section->owner)
11011 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11012
11013 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11014 {
11015 info->callbacks->einfo
11016 (_("%P: linkage table error against `%T'\n"),
11017 stub_entry->root.string);
11018 bfd_set_error (bfd_error_bad_value);
11019 htab->stub_error = TRUE;
11020 return FALSE;
11021 }
11022
11023 if (info->emitrelocations)
11024 {
11025 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11026 if (r == NULL)
11027 return FALSE;
11028 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11029 if (bfd_big_endian (info->output_bfd))
11030 r[0].r_offset += 2;
11031 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11032 r[0].r_offset += 4;
11033 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11034 r[0].r_addend = dest;
11035 if (PPC_HA (off) != 0)
11036 {
11037 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11038 r[1].r_offset = r[0].r_offset + 4;
11039 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11040 r[1].r_addend = r[0].r_addend;
11041 }
11042 }
11043
11044 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11045 {
11046 if (PPC_HA (off) != 0)
11047 {
11048 size = 16;
11049 bfd_put_32 (htab->params->stub_bfd,
11050 ADDIS_R12_R2 | PPC_HA (off), loc);
11051 loc += 4;
11052 bfd_put_32 (htab->params->stub_bfd,
11053 LD_R12_0R12 | PPC_LO (off), loc);
11054 }
11055 else
11056 {
11057 size = 12;
11058 bfd_put_32 (htab->params->stub_bfd,
11059 LD_R12_0R2 | PPC_LO (off), loc);
11060 }
11061 }
11062 else
11063 {
11064 bfd_vma r2off = get_r2off (info, stub_entry);
11065
11066 if (r2off == (bfd_vma) -1)
11067 {
11068 htab->stub_error = TRUE;
11069 return FALSE;
11070 }
11071
11072 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11073 loc += 4;
11074 size = 16;
11075 if (PPC_HA (off) != 0)
11076 {
11077 size += 4;
11078 bfd_put_32 (htab->params->stub_bfd,
11079 ADDIS_R12_R2 | PPC_HA (off), loc);
11080 loc += 4;
11081 bfd_put_32 (htab->params->stub_bfd,
11082 LD_R12_0R12 | PPC_LO (off), loc);
11083 }
11084 else
11085 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11086
11087 if (PPC_HA (r2off) != 0)
11088 {
11089 size += 4;
11090 loc += 4;
11091 bfd_put_32 (htab->params->stub_bfd,
11092 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11093 }
11094 if (PPC_LO (r2off) != 0)
11095 {
11096 size += 4;
11097 loc += 4;
11098 bfd_put_32 (htab->params->stub_bfd,
11099 ADDI_R2_R2 | PPC_LO (r2off), loc);
11100 }
11101 }
11102 loc += 4;
11103 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11104 loc += 4;
11105 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11106 break;
11107
11108 case ppc_stub_plt_call:
11109 case ppc_stub_plt_call_r2save:
11110 if (stub_entry->h != NULL
11111 && stub_entry->h->is_func_descriptor
11112 && stub_entry->h->oh != NULL)
11113 {
11114 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11115
11116 /* If the old-ABI "dot-symbol" is undefined make it weak so
11117 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11118 if (fh->elf.root.type == bfd_link_hash_undefined
11119 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11120 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11121 fh->elf.root.type = bfd_link_hash_undefweak;
11122 }
11123
11124 /* Now build the stub. */
11125 dest = stub_entry->plt_ent->plt.offset & ~1;
11126 if (dest >= (bfd_vma) -2)
11127 abort ();
11128
11129 plt = htab->elf.splt;
11130 if (!htab->elf.dynamic_sections_created
11131 || stub_entry->h == NULL
11132 || stub_entry->h->elf.dynindx == -1)
11133 plt = htab->elf.iplt;
11134
11135 dest += plt->output_offset + plt->output_section->vma;
11136
11137 if (stub_entry->h == NULL
11138 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11139 {
11140 Elf_Internal_Rela rela;
11141 bfd_byte *rl;
11142
11143 rela.r_offset = dest;
11144 if (htab->opd_abi)
11145 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11146 else
11147 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11148 rela.r_addend = (stub_entry->target_value
11149 + stub_entry->target_section->output_offset
11150 + stub_entry->target_section->output_section->vma);
11151
11152 rl = (htab->elf.irelplt->contents
11153 + (htab->elf.irelplt->reloc_count++
11154 * sizeof (Elf64_External_Rela)));
11155 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11156 stub_entry->plt_ent->plt.offset |= 1;
11157 htab->local_ifunc_resolver = 1;
11158 }
11159
11160 off = (dest
11161 - elf_gp (plt->output_section->owner)
11162 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11163
11164 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11165 {
11166 info->callbacks->einfo
11167 /* xgettext:c-format */
11168 (_("%P: linkage table error against `%T'\n"),
11169 stub_entry->h != NULL
11170 ? stub_entry->h->elf.root.root.string
11171 : "<local sym>");
11172 bfd_set_error (bfd_error_bad_value);
11173 htab->stub_error = TRUE;
11174 return FALSE;
11175 }
11176
11177 if (htab->params->plt_stub_align != 0)
11178 {
11179 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11180
11181 stub_entry->group->stub_sec->size += pad;
11182 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11183 loc += pad;
11184 }
11185
11186 r = NULL;
11187 if (info->emitrelocations)
11188 {
11189 r = get_relocs (stub_entry->group->stub_sec,
11190 ((PPC_HA (off) != 0)
11191 + (htab->opd_abi
11192 ? 2 + (htab->params->plt_static_chain
11193 && PPC_HA (off + 16) == PPC_HA (off))
11194 : 1)));
11195 if (r == NULL)
11196 return FALSE;
11197 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11198 if (bfd_big_endian (info->output_bfd))
11199 r[0].r_offset += 2;
11200 r[0].r_addend = dest;
11201 }
11202 if (stub_entry->h != NULL
11203 && (stub_entry->h == htab->tls_get_addr_fd
11204 || stub_entry->h == htab->tls_get_addr)
11205 && htab->params->tls_get_addr_opt)
11206 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11207 else
11208 p = build_plt_stub (htab, stub_entry, loc, off, r);
11209 size = p - loc;
11210 break;
11211
11212 case ppc_stub_save_res:
11213 return TRUE;
11214
11215 default:
11216 BFD_FAIL ();
11217 return FALSE;
11218 }
11219
11220 stub_entry->group->stub_sec->size += size;
11221
11222 if (htab->params->emit_stub_syms)
11223 {
11224 struct elf_link_hash_entry *h;
11225 size_t len1, len2;
11226 char *name;
11227 const char *const stub_str[] = { "long_branch",
11228 "long_branch_r2off",
11229 "plt_branch",
11230 "plt_branch_r2off",
11231 "plt_call",
11232 "plt_call" };
11233
11234 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11235 len2 = strlen (stub_entry->root.string);
11236 name = bfd_malloc (len1 + len2 + 2);
11237 if (name == NULL)
11238 return FALSE;
11239 memcpy (name, stub_entry->root.string, 9);
11240 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11241 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11242 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11243 if (h == NULL)
11244 return FALSE;
11245 if (h->root.type == bfd_link_hash_new)
11246 {
11247 h->root.type = bfd_link_hash_defined;
11248 h->root.u.def.section = stub_entry->group->stub_sec;
11249 h->root.u.def.value = stub_entry->stub_offset;
11250 h->ref_regular = 1;
11251 h->def_regular = 1;
11252 h->ref_regular_nonweak = 1;
11253 h->forced_local = 1;
11254 h->non_elf = 0;
11255 h->root.linker_def = 1;
11256 }
11257 }
11258
11259 return TRUE;
11260 }
11261
11262 /* As above, but don't actually build the stub. Just bump offset so
11263 we know stub section sizes, and select plt_branch stubs where
11264 long_branch stubs won't do. */
11265
11266 static bfd_boolean
11267 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11268 {
11269 struct ppc_stub_hash_entry *stub_entry;
11270 struct bfd_link_info *info;
11271 struct ppc_link_hash_table *htab;
11272 bfd_vma off;
11273 int size;
11274
11275 /* Massage our args to the form they really have. */
11276 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11277 info = in_arg;
11278
11279 htab = ppc_hash_table (info);
11280 if (htab == NULL)
11281 return FALSE;
11282
11283 if (stub_entry->h != NULL
11284 && stub_entry->h->save_res
11285 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11286 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11287 {
11288 /* Don't make stubs to out-of-line register save/restore
11289 functions. Instead, emit copies of the functions. */
11290 stub_entry->group->needs_save_res = 1;
11291 stub_entry->stub_type = ppc_stub_save_res;
11292 return TRUE;
11293 }
11294
11295 if (stub_entry->stub_type == ppc_stub_plt_call
11296 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11297 {
11298 asection *plt;
11299 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11300 if (off >= (bfd_vma) -2)
11301 abort ();
11302 plt = htab->elf.splt;
11303 if (!htab->elf.dynamic_sections_created
11304 || stub_entry->h == NULL
11305 || stub_entry->h->elf.dynindx == -1)
11306 plt = htab->elf.iplt;
11307 off += (plt->output_offset
11308 + plt->output_section->vma
11309 - elf_gp (plt->output_section->owner)
11310 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11311
11312 size = plt_stub_size (htab, stub_entry, off);
11313 if (stub_entry->h != NULL
11314 && (stub_entry->h == htab->tls_get_addr_fd
11315 || stub_entry->h == htab->tls_get_addr)
11316 && htab->params->tls_get_addr_opt
11317 && (ALWAYS_EMIT_R2SAVE
11318 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
11319 stub_entry->group->tls_get_addr_opt_bctrl
11320 = stub_entry->group->stub_sec->size + size - 5 * 4;
11321
11322 if (htab->params->plt_stub_align)
11323 size += plt_stub_pad (htab, stub_entry, off);
11324 if (info->emitrelocations)
11325 {
11326 stub_entry->group->stub_sec->reloc_count
11327 += ((PPC_HA (off) != 0)
11328 + (htab->opd_abi
11329 ? 2 + (htab->params->plt_static_chain
11330 && PPC_HA (off + 16) == PPC_HA (off))
11331 : 1));
11332 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11333 }
11334 }
11335 else
11336 {
11337 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11338 variants. */
11339 bfd_vma r2off = 0;
11340 bfd_vma local_off = 0;
11341
11342 off = (stub_entry->target_value
11343 + stub_entry->target_section->output_offset
11344 + stub_entry->target_section->output_section->vma);
11345 off -= (stub_entry->group->stub_sec->size
11346 + stub_entry->group->stub_sec->output_offset
11347 + stub_entry->group->stub_sec->output_section->vma);
11348
11349 /* Reset the stub type from the plt variant in case we now
11350 can reach with a shorter stub. */
11351 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11352 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11353
11354 size = 4;
11355 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11356 {
11357 r2off = get_r2off (info, stub_entry);
11358 if (r2off == (bfd_vma) -1)
11359 {
11360 htab->stub_error = TRUE;
11361 return FALSE;
11362 }
11363 size = 8;
11364 if (PPC_HA (r2off) != 0)
11365 size += 4;
11366 if (PPC_LO (r2off) != 0)
11367 size += 4;
11368 off -= size - 4;
11369 }
11370
11371 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11372
11373 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11374 Do the same for -R objects without function descriptors. */
11375 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11376 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11377 && r2off == 0
11378 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11379 {
11380 struct ppc_branch_hash_entry *br_entry;
11381
11382 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11383 stub_entry->root.string + 9,
11384 TRUE, FALSE);
11385 if (br_entry == NULL)
11386 {
11387 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11388 stub_entry->root.string);
11389 htab->stub_error = TRUE;
11390 return FALSE;
11391 }
11392
11393 if (br_entry->iter != htab->stub_iteration)
11394 {
11395 br_entry->iter = htab->stub_iteration;
11396 br_entry->offset = htab->brlt->size;
11397 htab->brlt->size += 8;
11398
11399 if (htab->relbrlt != NULL)
11400 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11401 else if (info->emitrelocations)
11402 {
11403 htab->brlt->reloc_count += 1;
11404 htab->brlt->flags |= SEC_RELOC;
11405 }
11406 }
11407
11408 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11409 off = (br_entry->offset
11410 + htab->brlt->output_offset
11411 + htab->brlt->output_section->vma
11412 - elf_gp (htab->brlt->output_section->owner)
11413 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11414
11415 if (info->emitrelocations)
11416 {
11417 stub_entry->group->stub_sec->reloc_count
11418 += 1 + (PPC_HA (off) != 0);
11419 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11420 }
11421
11422 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11423 {
11424 size = 12;
11425 if (PPC_HA (off) != 0)
11426 size = 16;
11427 }
11428 else
11429 {
11430 size = 16;
11431 if (PPC_HA (off) != 0)
11432 size += 4;
11433
11434 if (PPC_HA (r2off) != 0)
11435 size += 4;
11436 if (PPC_LO (r2off) != 0)
11437 size += 4;
11438 }
11439 }
11440 else if (info->emitrelocations)
11441 {
11442 stub_entry->group->stub_sec->reloc_count += 1;
11443 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11444 }
11445 }
11446
11447 stub_entry->group->stub_sec->size += size;
11448 return TRUE;
11449 }
11450
11451 /* Set up various things so that we can make a list of input sections
11452 for each output section included in the link. Returns -1 on error,
11453 0 when no stubs will be needed, and 1 on success. */
11454
11455 int
11456 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11457 {
11458 unsigned int id;
11459 bfd_size_type amt;
11460 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11461
11462 if (htab == NULL)
11463 return -1;
11464
11465 htab->sec_info_arr_size = bfd_get_next_section_id ();
11466 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11467 htab->sec_info = bfd_zmalloc (amt);
11468 if (htab->sec_info == NULL)
11469 return -1;
11470
11471 /* Set toc_off for com, und, abs and ind sections. */
11472 for (id = 0; id < 3; id++)
11473 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11474
11475 return 1;
11476 }
11477
11478 /* Set up for first pass at multitoc partitioning. */
11479
11480 void
11481 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11482 {
11483 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11484
11485 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11486 htab->toc_bfd = NULL;
11487 htab->toc_first_sec = NULL;
11488 }
11489
11490 /* The linker repeatedly calls this function for each TOC input section
11491 and linker generated GOT section. Group input bfds such that the toc
11492 within a group is less than 64k in size. */
11493
11494 bfd_boolean
11495 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11496 {
11497 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11498 bfd_vma addr, off, limit;
11499
11500 if (htab == NULL)
11501 return FALSE;
11502
11503 if (!htab->second_toc_pass)
11504 {
11505 /* Keep track of the first .toc or .got section for this input bfd. */
11506 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11507
11508 if (new_bfd)
11509 {
11510 htab->toc_bfd = isec->owner;
11511 htab->toc_first_sec = isec;
11512 }
11513
11514 addr = isec->output_offset + isec->output_section->vma;
11515 off = addr - htab->toc_curr;
11516 limit = 0x80008000;
11517 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11518 limit = 0x10000;
11519 if (off + isec->size > limit)
11520 {
11521 addr = (htab->toc_first_sec->output_offset
11522 + htab->toc_first_sec->output_section->vma);
11523 htab->toc_curr = addr;
11524 htab->toc_curr &= -TOC_BASE_ALIGN;
11525 }
11526
11527 /* toc_curr is the base address of this toc group. Set elf_gp
11528 for the input section to be the offset relative to the
11529 output toc base plus 0x8000. Making the input elf_gp an
11530 offset allows us to move the toc as a whole without
11531 recalculating input elf_gp. */
11532 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11533 off += TOC_BASE_OFF;
11534
11535 /* Die if someone uses a linker script that doesn't keep input
11536 file .toc and .got together. */
11537 if (new_bfd
11538 && elf_gp (isec->owner) != 0
11539 && elf_gp (isec->owner) != off)
11540 return FALSE;
11541
11542 elf_gp (isec->owner) = off;
11543 return TRUE;
11544 }
11545
11546 /* During the second pass toc_first_sec points to the start of
11547 a toc group, and toc_curr is used to track the old elf_gp.
11548 We use toc_bfd to ensure we only look at each bfd once. */
11549 if (htab->toc_bfd == isec->owner)
11550 return TRUE;
11551 htab->toc_bfd = isec->owner;
11552
11553 if (htab->toc_first_sec == NULL
11554 || htab->toc_curr != elf_gp (isec->owner))
11555 {
11556 htab->toc_curr = elf_gp (isec->owner);
11557 htab->toc_first_sec = isec;
11558 }
11559 addr = (htab->toc_first_sec->output_offset
11560 + htab->toc_first_sec->output_section->vma);
11561 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11562 elf_gp (isec->owner) = off;
11563
11564 return TRUE;
11565 }
11566
11567 /* Called via elf_link_hash_traverse to merge GOT entries for global
11568 symbol H. */
11569
11570 static bfd_boolean
11571 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11572 {
11573 if (h->root.type == bfd_link_hash_indirect)
11574 return TRUE;
11575
11576 merge_got_entries (&h->got.glist);
11577
11578 return TRUE;
11579 }
11580
11581 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11582 symbol H. */
11583
11584 static bfd_boolean
11585 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11586 {
11587 struct got_entry *gent;
11588
11589 if (h->root.type == bfd_link_hash_indirect)
11590 return TRUE;
11591
11592 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11593 if (!gent->is_indirect)
11594 allocate_got (h, (struct bfd_link_info *) inf, gent);
11595 return TRUE;
11596 }
11597
11598 /* Called on the first multitoc pass after the last call to
11599 ppc64_elf_next_toc_section. This function removes duplicate GOT
11600 entries. */
11601
11602 bfd_boolean
11603 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11604 {
11605 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11606 struct bfd *ibfd, *ibfd2;
11607 bfd_boolean done_something;
11608
11609 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11610
11611 if (!htab->do_multi_toc)
11612 return FALSE;
11613
11614 /* Merge global sym got entries within a toc group. */
11615 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11616
11617 /* And tlsld_got. */
11618 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11619 {
11620 struct got_entry *ent, *ent2;
11621
11622 if (!is_ppc64_elf (ibfd))
11623 continue;
11624
11625 ent = ppc64_tlsld_got (ibfd);
11626 if (!ent->is_indirect
11627 && ent->got.offset != (bfd_vma) -1)
11628 {
11629 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11630 {
11631 if (!is_ppc64_elf (ibfd2))
11632 continue;
11633
11634 ent2 = ppc64_tlsld_got (ibfd2);
11635 if (!ent2->is_indirect
11636 && ent2->got.offset != (bfd_vma) -1
11637 && elf_gp (ibfd2) == elf_gp (ibfd))
11638 {
11639 ent2->is_indirect = TRUE;
11640 ent2->got.ent = ent;
11641 }
11642 }
11643 }
11644 }
11645
11646 /* Zap sizes of got sections. */
11647 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11648 htab->elf.irelplt->size -= htab->got_reli_size;
11649 htab->got_reli_size = 0;
11650
11651 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11652 {
11653 asection *got, *relgot;
11654
11655 if (!is_ppc64_elf (ibfd))
11656 continue;
11657
11658 got = ppc64_elf_tdata (ibfd)->got;
11659 if (got != NULL)
11660 {
11661 got->rawsize = got->size;
11662 got->size = 0;
11663 relgot = ppc64_elf_tdata (ibfd)->relgot;
11664 relgot->rawsize = relgot->size;
11665 relgot->size = 0;
11666 }
11667 }
11668
11669 /* Now reallocate the got, local syms first. We don't need to
11670 allocate section contents again since we never increase size. */
11671 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11672 {
11673 struct got_entry **lgot_ents;
11674 struct got_entry **end_lgot_ents;
11675 struct plt_entry **local_plt;
11676 struct plt_entry **end_local_plt;
11677 unsigned char *lgot_masks;
11678 bfd_size_type locsymcount;
11679 Elf_Internal_Shdr *symtab_hdr;
11680 asection *s;
11681
11682 if (!is_ppc64_elf (ibfd))
11683 continue;
11684
11685 lgot_ents = elf_local_got_ents (ibfd);
11686 if (!lgot_ents)
11687 continue;
11688
11689 symtab_hdr = &elf_symtab_hdr (ibfd);
11690 locsymcount = symtab_hdr->sh_info;
11691 end_lgot_ents = lgot_ents + locsymcount;
11692 local_plt = (struct plt_entry **) end_lgot_ents;
11693 end_local_plt = local_plt + locsymcount;
11694 lgot_masks = (unsigned char *) end_local_plt;
11695 s = ppc64_elf_tdata (ibfd)->got;
11696 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11697 {
11698 struct got_entry *ent;
11699
11700 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11701 {
11702 unsigned int ent_size = 8;
11703 unsigned int rel_size = sizeof (Elf64_External_Rela);
11704
11705 ent->got.offset = s->size;
11706 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11707 {
11708 ent_size *= 2;
11709 rel_size *= 2;
11710 }
11711 s->size += ent_size;
11712 if ((*lgot_masks & PLT_IFUNC) != 0)
11713 {
11714 htab->elf.irelplt->size += rel_size;
11715 htab->got_reli_size += rel_size;
11716 }
11717 else if (bfd_link_pic (info))
11718 {
11719 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11720 srel->size += rel_size;
11721 }
11722 }
11723 }
11724 }
11725
11726 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11727
11728 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11729 {
11730 struct got_entry *ent;
11731
11732 if (!is_ppc64_elf (ibfd))
11733 continue;
11734
11735 ent = ppc64_tlsld_got (ibfd);
11736 if (!ent->is_indirect
11737 && ent->got.offset != (bfd_vma) -1)
11738 {
11739 asection *s = ppc64_elf_tdata (ibfd)->got;
11740 ent->got.offset = s->size;
11741 s->size += 16;
11742 if (bfd_link_pic (info))
11743 {
11744 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11745 srel->size += sizeof (Elf64_External_Rela);
11746 }
11747 }
11748 }
11749
11750 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11751 if (!done_something)
11752 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11753 {
11754 asection *got;
11755
11756 if (!is_ppc64_elf (ibfd))
11757 continue;
11758
11759 got = ppc64_elf_tdata (ibfd)->got;
11760 if (got != NULL)
11761 {
11762 done_something = got->rawsize != got->size;
11763 if (done_something)
11764 break;
11765 }
11766 }
11767
11768 if (done_something)
11769 (*htab->params->layout_sections_again) ();
11770
11771 /* Set up for second pass over toc sections to recalculate elf_gp
11772 on input sections. */
11773 htab->toc_bfd = NULL;
11774 htab->toc_first_sec = NULL;
11775 htab->second_toc_pass = TRUE;
11776 return done_something;
11777 }
11778
11779 /* Called after second pass of multitoc partitioning. */
11780
11781 void
11782 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11783 {
11784 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11785
11786 /* After the second pass, toc_curr tracks the TOC offset used
11787 for code sections below in ppc64_elf_next_input_section. */
11788 htab->toc_curr = TOC_BASE_OFF;
11789 }
11790
11791 /* No toc references were found in ISEC. If the code in ISEC makes no
11792 calls, then there's no need to use toc adjusting stubs when branching
11793 into ISEC. Actually, indirect calls from ISEC are OK as they will
11794 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11795 needed, and 2 if a cyclical call-graph was found but no other reason
11796 for a stub was detected. If called from the top level, a return of
11797 2 means the same as a return of 0. */
11798
11799 static int
11800 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11801 {
11802 int ret;
11803
11804 /* Mark this section as checked. */
11805 isec->call_check_done = 1;
11806
11807 /* We know none of our code bearing sections will need toc stubs. */
11808 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11809 return 0;
11810
11811 if (isec->size == 0)
11812 return 0;
11813
11814 if (isec->output_section == NULL)
11815 return 0;
11816
11817 ret = 0;
11818 if (isec->reloc_count != 0)
11819 {
11820 Elf_Internal_Rela *relstart, *rel;
11821 Elf_Internal_Sym *local_syms;
11822 struct ppc_link_hash_table *htab;
11823
11824 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11825 info->keep_memory);
11826 if (relstart == NULL)
11827 return -1;
11828
11829 /* Look for branches to outside of this section. */
11830 local_syms = NULL;
11831 htab = ppc_hash_table (info);
11832 if (htab == NULL)
11833 return -1;
11834
11835 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11836 {
11837 enum elf_ppc64_reloc_type r_type;
11838 unsigned long r_symndx;
11839 struct elf_link_hash_entry *h;
11840 struct ppc_link_hash_entry *eh;
11841 Elf_Internal_Sym *sym;
11842 asection *sym_sec;
11843 struct _opd_sec_data *opd;
11844 bfd_vma sym_value;
11845 bfd_vma dest;
11846
11847 r_type = ELF64_R_TYPE (rel->r_info);
11848 if (r_type != R_PPC64_REL24
11849 && r_type != R_PPC64_REL14
11850 && r_type != R_PPC64_REL14_BRTAKEN
11851 && r_type != R_PPC64_REL14_BRNTAKEN)
11852 continue;
11853
11854 r_symndx = ELF64_R_SYM (rel->r_info);
11855 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11856 isec->owner))
11857 {
11858 ret = -1;
11859 break;
11860 }
11861
11862 /* Calls to dynamic lib functions go through a plt call stub
11863 that uses r2. */
11864 eh = (struct ppc_link_hash_entry *) h;
11865 if (eh != NULL
11866 && (eh->elf.plt.plist != NULL
11867 || (eh->oh != NULL
11868 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11869 {
11870 ret = 1;
11871 break;
11872 }
11873
11874 if (sym_sec == NULL)
11875 /* Ignore other undefined symbols. */
11876 continue;
11877
11878 /* Assume branches to other sections not included in the
11879 link need stubs too, to cover -R and absolute syms. */
11880 if (sym_sec->output_section == NULL)
11881 {
11882 ret = 1;
11883 break;
11884 }
11885
11886 if (h == NULL)
11887 sym_value = sym->st_value;
11888 else
11889 {
11890 if (h->root.type != bfd_link_hash_defined
11891 && h->root.type != bfd_link_hash_defweak)
11892 abort ();
11893 sym_value = h->root.u.def.value;
11894 }
11895 sym_value += rel->r_addend;
11896
11897 /* If this branch reloc uses an opd sym, find the code section. */
11898 opd = get_opd_info (sym_sec);
11899 if (opd != NULL)
11900 {
11901 if (h == NULL && opd->adjust != NULL)
11902 {
11903 long adjust;
11904
11905 adjust = opd->adjust[OPD_NDX (sym_value)];
11906 if (adjust == -1)
11907 /* Assume deleted functions won't ever be called. */
11908 continue;
11909 sym_value += adjust;
11910 }
11911
11912 dest = opd_entry_value (sym_sec, sym_value,
11913 &sym_sec, NULL, FALSE);
11914 if (dest == (bfd_vma) -1)
11915 continue;
11916 }
11917 else
11918 dest = (sym_value
11919 + sym_sec->output_offset
11920 + sym_sec->output_section->vma);
11921
11922 /* Ignore branch to self. */
11923 if (sym_sec == isec)
11924 continue;
11925
11926 /* If the called function uses the toc, we need a stub. */
11927 if (sym_sec->has_toc_reloc
11928 || sym_sec->makes_toc_func_call)
11929 {
11930 ret = 1;
11931 break;
11932 }
11933
11934 /* Assume any branch that needs a long branch stub might in fact
11935 need a plt_branch stub. A plt_branch stub uses r2. */
11936 else if (dest - (isec->output_offset
11937 + isec->output_section->vma
11938 + rel->r_offset) + (1 << 25)
11939 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11940 ? h->other
11941 : sym->st_other))
11942 {
11943 ret = 1;
11944 break;
11945 }
11946
11947 /* If calling back to a section in the process of being
11948 tested, we can't say for sure that no toc adjusting stubs
11949 are needed, so don't return zero. */
11950 else if (sym_sec->call_check_in_progress)
11951 ret = 2;
11952
11953 /* Branches to another section that itself doesn't have any TOC
11954 references are OK. Recursively call ourselves to check. */
11955 else if (!sym_sec->call_check_done)
11956 {
11957 int recur;
11958
11959 /* Mark current section as indeterminate, so that other
11960 sections that call back to current won't be marked as
11961 known. */
11962 isec->call_check_in_progress = 1;
11963 recur = toc_adjusting_stub_needed (info, sym_sec);
11964 isec->call_check_in_progress = 0;
11965
11966 if (recur != 0)
11967 {
11968 ret = recur;
11969 if (recur != 2)
11970 break;
11971 }
11972 }
11973 }
11974
11975 if (local_syms != NULL
11976 && (elf_symtab_hdr (isec->owner).contents
11977 != (unsigned char *) local_syms))
11978 free (local_syms);
11979 if (elf_section_data (isec)->relocs != relstart)
11980 free (relstart);
11981 }
11982
11983 if ((ret & 1) == 0
11984 && isec->map_head.s != NULL
11985 && (strcmp (isec->output_section->name, ".init") == 0
11986 || strcmp (isec->output_section->name, ".fini") == 0))
11987 {
11988 if (isec->map_head.s->has_toc_reloc
11989 || isec->map_head.s->makes_toc_func_call)
11990 ret = 1;
11991 else if (!isec->map_head.s->call_check_done)
11992 {
11993 int recur;
11994 isec->call_check_in_progress = 1;
11995 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11996 isec->call_check_in_progress = 0;
11997 if (recur != 0)
11998 ret = recur;
11999 }
12000 }
12001
12002 if (ret == 1)
12003 isec->makes_toc_func_call = 1;
12004
12005 return ret;
12006 }
12007
12008 /* The linker repeatedly calls this function for each input section,
12009 in the order that input sections are linked into output sections.
12010 Build lists of input sections to determine groupings between which
12011 we may insert linker stubs. */
12012
12013 bfd_boolean
12014 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12015 {
12016 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12017
12018 if (htab == NULL)
12019 return FALSE;
12020
12021 if ((isec->output_section->flags & SEC_CODE) != 0
12022 && isec->output_section->id < htab->sec_info_arr_size)
12023 {
12024 /* This happens to make the list in reverse order,
12025 which is what we want. */
12026 htab->sec_info[isec->id].u.list
12027 = htab->sec_info[isec->output_section->id].u.list;
12028 htab->sec_info[isec->output_section->id].u.list = isec;
12029 }
12030
12031 if (htab->multi_toc_needed)
12032 {
12033 /* Analyse sections that aren't already flagged as needing a
12034 valid toc pointer. Exclude .fixup for the linux kernel.
12035 .fixup contains branches, but only back to the function that
12036 hit an exception. */
12037 if (!(isec->has_toc_reloc
12038 || (isec->flags & SEC_CODE) == 0
12039 || strcmp (isec->name, ".fixup") == 0
12040 || isec->call_check_done))
12041 {
12042 if (toc_adjusting_stub_needed (info, isec) < 0)
12043 return FALSE;
12044 }
12045 /* Make all sections use the TOC assigned for this object file.
12046 This will be wrong for pasted sections; We fix that in
12047 check_pasted_section(). */
12048 if (elf_gp (isec->owner) != 0)
12049 htab->toc_curr = elf_gp (isec->owner);
12050 }
12051
12052 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12053 return TRUE;
12054 }
12055
12056 /* Check that all .init and .fini sections use the same toc, if they
12057 have toc relocs. */
12058
12059 static bfd_boolean
12060 check_pasted_section (struct bfd_link_info *info, const char *name)
12061 {
12062 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12063
12064 if (o != NULL)
12065 {
12066 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12067 bfd_vma toc_off = 0;
12068 asection *i;
12069
12070 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12071 if (i->has_toc_reloc)
12072 {
12073 if (toc_off == 0)
12074 toc_off = htab->sec_info[i->id].toc_off;
12075 else if (toc_off != htab->sec_info[i->id].toc_off)
12076 return FALSE;
12077 }
12078
12079 if (toc_off == 0)
12080 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12081 if (i->makes_toc_func_call)
12082 {
12083 toc_off = htab->sec_info[i->id].toc_off;
12084 break;
12085 }
12086
12087 /* Make sure the whole pasted function uses the same toc offset. */
12088 if (toc_off != 0)
12089 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12090 htab->sec_info[i->id].toc_off = toc_off;
12091 }
12092 return TRUE;
12093 }
12094
12095 bfd_boolean
12096 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12097 {
12098 return (check_pasted_section (info, ".init")
12099 & check_pasted_section (info, ".fini"));
12100 }
12101
12102 /* See whether we can group stub sections together. Grouping stub
12103 sections may result in fewer stubs. More importantly, we need to
12104 put all .init* and .fini* stubs at the beginning of the .init or
12105 .fini output sections respectively, because glibc splits the
12106 _init and _fini functions into multiple parts. Putting a stub in
12107 the middle of a function is not a good idea. */
12108
12109 static bfd_boolean
12110 group_sections (struct bfd_link_info *info,
12111 bfd_size_type stub_group_size,
12112 bfd_boolean stubs_always_before_branch)
12113 {
12114 struct ppc_link_hash_table *htab;
12115 asection *osec;
12116 bfd_boolean suppress_size_errors;
12117
12118 htab = ppc_hash_table (info);
12119 if (htab == NULL)
12120 return FALSE;
12121
12122 suppress_size_errors = FALSE;
12123 if (stub_group_size == 1)
12124 {
12125 /* Default values. */
12126 if (stubs_always_before_branch)
12127 stub_group_size = 0x1e00000;
12128 else
12129 stub_group_size = 0x1c00000;
12130 suppress_size_errors = TRUE;
12131 }
12132
12133 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12134 {
12135 asection *tail;
12136
12137 if (osec->id >= htab->sec_info_arr_size)
12138 continue;
12139
12140 tail = htab->sec_info[osec->id].u.list;
12141 while (tail != NULL)
12142 {
12143 asection *curr;
12144 asection *prev;
12145 bfd_size_type total;
12146 bfd_boolean big_sec;
12147 bfd_vma curr_toc;
12148 struct map_stub *group;
12149 bfd_size_type group_size;
12150
12151 curr = tail;
12152 total = tail->size;
12153 group_size = (ppc64_elf_section_data (tail) != NULL
12154 && ppc64_elf_section_data (tail)->has_14bit_branch
12155 ? stub_group_size >> 10 : stub_group_size);
12156
12157 big_sec = total > group_size;
12158 if (big_sec && !suppress_size_errors)
12159 /* xgettext:c-format */
12160 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12161 tail->owner, tail);
12162 curr_toc = htab->sec_info[tail->id].toc_off;
12163
12164 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12165 && ((total += curr->output_offset - prev->output_offset)
12166 < (ppc64_elf_section_data (prev) != NULL
12167 && ppc64_elf_section_data (prev)->has_14bit_branch
12168 ? (group_size = stub_group_size >> 10) : group_size))
12169 && htab->sec_info[prev->id].toc_off == curr_toc)
12170 curr = prev;
12171
12172 /* OK, the size from the start of CURR to the end is less
12173 than group_size and thus can be handled by one stub
12174 section. (or the tail section is itself larger than
12175 group_size, in which case we may be toast.) We should
12176 really be keeping track of the total size of stubs added
12177 here, as stubs contribute to the final output section
12178 size. That's a little tricky, and this way will only
12179 break if stubs added make the total size more than 2^25,
12180 ie. for the default stub_group_size, if stubs total more
12181 than 2097152 bytes, or nearly 75000 plt call stubs. */
12182 group = bfd_alloc (curr->owner, sizeof (*group));
12183 if (group == NULL)
12184 return FALSE;
12185 group->link_sec = curr;
12186 group->stub_sec = NULL;
12187 group->needs_save_res = 0;
12188 group->tls_get_addr_opt_bctrl = -1u;
12189 group->next = htab->group;
12190 htab->group = group;
12191 do
12192 {
12193 prev = htab->sec_info[tail->id].u.list;
12194 /* Set up this stub group. */
12195 htab->sec_info[tail->id].u.group = group;
12196 }
12197 while (tail != curr && (tail = prev) != NULL);
12198
12199 /* But wait, there's more! Input sections up to group_size
12200 bytes before the stub section can be handled by it too.
12201 Don't do this if we have a really large section after the
12202 stubs, as adding more stubs increases the chance that
12203 branches may not reach into the stub section. */
12204 if (!stubs_always_before_branch && !big_sec)
12205 {
12206 total = 0;
12207 while (prev != NULL
12208 && ((total += tail->output_offset - prev->output_offset)
12209 < (ppc64_elf_section_data (prev) != NULL
12210 && ppc64_elf_section_data (prev)->has_14bit_branch
12211 ? (group_size = stub_group_size >> 10) : group_size))
12212 && htab->sec_info[prev->id].toc_off == curr_toc)
12213 {
12214 tail = prev;
12215 prev = htab->sec_info[tail->id].u.list;
12216 htab->sec_info[tail->id].u.group = group;
12217 }
12218 }
12219 tail = prev;
12220 }
12221 }
12222 return TRUE;
12223 }
12224
12225 static const unsigned char glink_eh_frame_cie[] =
12226 {
12227 0, 0, 0, 16, /* length. */
12228 0, 0, 0, 0, /* id. */
12229 1, /* CIE version. */
12230 'z', 'R', 0, /* Augmentation string. */
12231 4, /* Code alignment. */
12232 0x78, /* Data alignment. */
12233 65, /* RA reg. */
12234 1, /* Augmentation size. */
12235 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12236 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12237 };
12238
12239 static size_t
12240 stub_eh_frame_size (struct map_stub *group, size_t align)
12241 {
12242 size_t this_size = 17;
12243 if (group->tls_get_addr_opt_bctrl != -1u)
12244 {
12245 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12246 if (to_bctrl < 64)
12247 this_size += 1;
12248 else if (to_bctrl < 256)
12249 this_size += 2;
12250 else if (to_bctrl < 65536)
12251 this_size += 3;
12252 else
12253 this_size += 5;
12254 this_size += 6;
12255 }
12256 this_size = (this_size + align - 1) & -align;
12257 return this_size;
12258 }
12259
12260 /* Stripping output sections is normally done before dynamic section
12261 symbols have been allocated. This function is called later, and
12262 handles cases like htab->brlt which is mapped to its own output
12263 section. */
12264
12265 static void
12266 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12267 {
12268 if (isec->size == 0
12269 && isec->output_section->size == 0
12270 && !(isec->output_section->flags & SEC_KEEP)
12271 && !bfd_section_removed_from_list (info->output_bfd,
12272 isec->output_section)
12273 && elf_section_data (isec->output_section)->dynindx == 0)
12274 {
12275 isec->output_section->flags |= SEC_EXCLUDE;
12276 bfd_section_list_remove (info->output_bfd, isec->output_section);
12277 info->output_bfd->section_count--;
12278 }
12279 }
12280
12281 /* Determine and set the size of the stub section for a final link.
12282
12283 The basic idea here is to examine all the relocations looking for
12284 PC-relative calls to a target that is unreachable with a "bl"
12285 instruction. */
12286
12287 bfd_boolean
12288 ppc64_elf_size_stubs (struct bfd_link_info *info)
12289 {
12290 bfd_size_type stub_group_size;
12291 bfd_boolean stubs_always_before_branch;
12292 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12293
12294 if (htab == NULL)
12295 return FALSE;
12296
12297 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12298 htab->params->plt_thread_safe = 1;
12299 if (!htab->opd_abi)
12300 htab->params->plt_thread_safe = 0;
12301 else if (htab->params->plt_thread_safe == -1)
12302 {
12303 static const char *const thread_starter[] =
12304 {
12305 "pthread_create",
12306 /* libstdc++ */
12307 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12308 /* librt */
12309 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12310 "mq_notify", "create_timer",
12311 /* libanl */
12312 "getaddrinfo_a",
12313 /* libgomp */
12314 "GOMP_parallel",
12315 "GOMP_parallel_start",
12316 "GOMP_parallel_loop_static",
12317 "GOMP_parallel_loop_static_start",
12318 "GOMP_parallel_loop_dynamic",
12319 "GOMP_parallel_loop_dynamic_start",
12320 "GOMP_parallel_loop_guided",
12321 "GOMP_parallel_loop_guided_start",
12322 "GOMP_parallel_loop_runtime",
12323 "GOMP_parallel_loop_runtime_start",
12324 "GOMP_parallel_sections",
12325 "GOMP_parallel_sections_start",
12326 /* libgo */
12327 "__go_go",
12328 };
12329 unsigned i;
12330
12331 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12332 {
12333 struct elf_link_hash_entry *h;
12334 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12335 FALSE, FALSE, TRUE);
12336 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12337 if (htab->params->plt_thread_safe)
12338 break;
12339 }
12340 }
12341 stubs_always_before_branch = htab->params->group_size < 0;
12342 if (htab->params->group_size < 0)
12343 stub_group_size = -htab->params->group_size;
12344 else
12345 stub_group_size = htab->params->group_size;
12346
12347 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12348 return FALSE;
12349
12350 #define STUB_SHRINK_ITER 20
12351 /* Loop until no stubs added. After iteration 20 of this loop we may
12352 exit on a stub section shrinking. This is to break out of a
12353 pathological case where adding stubs on one iteration decreases
12354 section gaps (perhaps due to alignment), which then requires
12355 fewer or smaller stubs on the next iteration. */
12356
12357 while (1)
12358 {
12359 bfd *input_bfd;
12360 unsigned int bfd_indx;
12361 struct map_stub *group;
12362
12363 htab->stub_iteration += 1;
12364
12365 for (input_bfd = info->input_bfds, bfd_indx = 0;
12366 input_bfd != NULL;
12367 input_bfd = input_bfd->link.next, bfd_indx++)
12368 {
12369 Elf_Internal_Shdr *symtab_hdr;
12370 asection *section;
12371 Elf_Internal_Sym *local_syms = NULL;
12372
12373 if (!is_ppc64_elf (input_bfd))
12374 continue;
12375
12376 /* We'll need the symbol table in a second. */
12377 symtab_hdr = &elf_symtab_hdr (input_bfd);
12378 if (symtab_hdr->sh_info == 0)
12379 continue;
12380
12381 /* Walk over each section attached to the input bfd. */
12382 for (section = input_bfd->sections;
12383 section != NULL;
12384 section = section->next)
12385 {
12386 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12387
12388 /* If there aren't any relocs, then there's nothing more
12389 to do. */
12390 if ((section->flags & SEC_RELOC) == 0
12391 || (section->flags & SEC_ALLOC) == 0
12392 || (section->flags & SEC_LOAD) == 0
12393 || (section->flags & SEC_CODE) == 0
12394 || section->reloc_count == 0)
12395 continue;
12396
12397 /* If this section is a link-once section that will be
12398 discarded, then don't create any stubs. */
12399 if (section->output_section == NULL
12400 || section->output_section->owner != info->output_bfd)
12401 continue;
12402
12403 /* Get the relocs. */
12404 internal_relocs
12405 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12406 info->keep_memory);
12407 if (internal_relocs == NULL)
12408 goto error_ret_free_local;
12409
12410 /* Now examine each relocation. */
12411 irela = internal_relocs;
12412 irelaend = irela + section->reloc_count;
12413 for (; irela < irelaend; irela++)
12414 {
12415 enum elf_ppc64_reloc_type r_type;
12416 unsigned int r_indx;
12417 enum ppc_stub_type stub_type;
12418 struct ppc_stub_hash_entry *stub_entry;
12419 asection *sym_sec, *code_sec;
12420 bfd_vma sym_value, code_value;
12421 bfd_vma destination;
12422 unsigned long local_off;
12423 bfd_boolean ok_dest;
12424 struct ppc_link_hash_entry *hash;
12425 struct ppc_link_hash_entry *fdh;
12426 struct elf_link_hash_entry *h;
12427 Elf_Internal_Sym *sym;
12428 char *stub_name;
12429 const asection *id_sec;
12430 struct _opd_sec_data *opd;
12431 struct plt_entry *plt_ent;
12432
12433 r_type = ELF64_R_TYPE (irela->r_info);
12434 r_indx = ELF64_R_SYM (irela->r_info);
12435
12436 if (r_type >= R_PPC64_max)
12437 {
12438 bfd_set_error (bfd_error_bad_value);
12439 goto error_ret_free_internal;
12440 }
12441
12442 /* Only look for stubs on branch instructions. */
12443 if (r_type != R_PPC64_REL24
12444 && r_type != R_PPC64_REL14
12445 && r_type != R_PPC64_REL14_BRTAKEN
12446 && r_type != R_PPC64_REL14_BRNTAKEN)
12447 continue;
12448
12449 /* Now determine the call target, its name, value,
12450 section. */
12451 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12452 r_indx, input_bfd))
12453 goto error_ret_free_internal;
12454 hash = (struct ppc_link_hash_entry *) h;
12455
12456 ok_dest = FALSE;
12457 fdh = NULL;
12458 sym_value = 0;
12459 if (hash == NULL)
12460 {
12461 sym_value = sym->st_value;
12462 if (sym_sec != NULL
12463 && sym_sec->output_section != NULL)
12464 ok_dest = TRUE;
12465 }
12466 else if (hash->elf.root.type == bfd_link_hash_defined
12467 || hash->elf.root.type == bfd_link_hash_defweak)
12468 {
12469 sym_value = hash->elf.root.u.def.value;
12470 if (sym_sec->output_section != NULL)
12471 ok_dest = TRUE;
12472 }
12473 else if (hash->elf.root.type == bfd_link_hash_undefweak
12474 || hash->elf.root.type == bfd_link_hash_undefined)
12475 {
12476 /* Recognise an old ABI func code entry sym, and
12477 use the func descriptor sym instead if it is
12478 defined. */
12479 if (hash->elf.root.root.string[0] == '.'
12480 && hash->oh != NULL)
12481 {
12482 fdh = ppc_follow_link (hash->oh);
12483 if (fdh->elf.root.type == bfd_link_hash_defined
12484 || fdh->elf.root.type == bfd_link_hash_defweak)
12485 {
12486 sym_sec = fdh->elf.root.u.def.section;
12487 sym_value = fdh->elf.root.u.def.value;
12488 if (sym_sec->output_section != NULL)
12489 ok_dest = TRUE;
12490 }
12491 else
12492 fdh = NULL;
12493 }
12494 }
12495 else
12496 {
12497 bfd_set_error (bfd_error_bad_value);
12498 goto error_ret_free_internal;
12499 }
12500
12501 destination = 0;
12502 local_off = 0;
12503 if (ok_dest)
12504 {
12505 sym_value += irela->r_addend;
12506 destination = (sym_value
12507 + sym_sec->output_offset
12508 + sym_sec->output_section->vma);
12509 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12510 ? hash->elf.other
12511 : sym->st_other);
12512 }
12513
12514 code_sec = sym_sec;
12515 code_value = sym_value;
12516 opd = get_opd_info (sym_sec);
12517 if (opd != NULL)
12518 {
12519 bfd_vma dest;
12520
12521 if (hash == NULL && opd->adjust != NULL)
12522 {
12523 long adjust = opd->adjust[OPD_NDX (sym_value)];
12524 if (adjust == -1)
12525 continue;
12526 code_value += adjust;
12527 sym_value += adjust;
12528 }
12529 dest = opd_entry_value (sym_sec, sym_value,
12530 &code_sec, &code_value, FALSE);
12531 if (dest != (bfd_vma) -1)
12532 {
12533 destination = dest;
12534 if (fdh != NULL)
12535 {
12536 /* Fixup old ABI sym to point at code
12537 entry. */
12538 hash->elf.root.type = bfd_link_hash_defweak;
12539 hash->elf.root.u.def.section = code_sec;
12540 hash->elf.root.u.def.value = code_value;
12541 }
12542 }
12543 }
12544
12545 /* Determine what (if any) linker stub is needed. */
12546 plt_ent = NULL;
12547 stub_type = ppc_type_of_stub (section, irela, &hash,
12548 &plt_ent, destination,
12549 local_off);
12550
12551 if (stub_type != ppc_stub_plt_call)
12552 {
12553 /* Check whether we need a TOC adjusting stub.
12554 Since the linker pastes together pieces from
12555 different object files when creating the
12556 _init and _fini functions, it may be that a
12557 call to what looks like a local sym is in
12558 fact a call needing a TOC adjustment. */
12559 if (code_sec != NULL
12560 && code_sec->output_section != NULL
12561 && (htab->sec_info[code_sec->id].toc_off
12562 != htab->sec_info[section->id].toc_off)
12563 && (code_sec->has_toc_reloc
12564 || code_sec->makes_toc_func_call))
12565 stub_type = ppc_stub_long_branch_r2off;
12566 }
12567
12568 if (stub_type == ppc_stub_none)
12569 continue;
12570
12571 /* __tls_get_addr calls might be eliminated. */
12572 if (stub_type != ppc_stub_plt_call
12573 && hash != NULL
12574 && (hash == htab->tls_get_addr
12575 || hash == htab->tls_get_addr_fd)
12576 && section->has_tls_reloc
12577 && irela != internal_relocs)
12578 {
12579 /* Get tls info. */
12580 unsigned char *tls_mask;
12581
12582 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12583 irela - 1, input_bfd))
12584 goto error_ret_free_internal;
12585 if (*tls_mask != 0)
12586 continue;
12587 }
12588
12589 if (stub_type == ppc_stub_plt_call)
12590 {
12591 if (!htab->opd_abi
12592 && htab->params->plt_localentry0 != 0
12593 && is_elfv2_localentry0 (&hash->elf))
12594 htab->has_plt_localentry0 = 1;
12595 else if (irela + 1 < irelaend
12596 && irela[1].r_offset == irela->r_offset + 4
12597 && (ELF64_R_TYPE (irela[1].r_info)
12598 == R_PPC64_TOCSAVE))
12599 {
12600 if (!tocsave_find (htab, INSERT,
12601 &local_syms, irela + 1, input_bfd))
12602 goto error_ret_free_internal;
12603 }
12604 else
12605 stub_type = ppc_stub_plt_call_r2save;
12606 }
12607
12608 /* Support for grouping stub sections. */
12609 id_sec = htab->sec_info[section->id].u.group->link_sec;
12610
12611 /* Get the name of this stub. */
12612 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12613 if (!stub_name)
12614 goto error_ret_free_internal;
12615
12616 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12617 stub_name, FALSE, FALSE);
12618 if (stub_entry != NULL)
12619 {
12620 /* The proper stub has already been created. */
12621 free (stub_name);
12622 if (stub_type == ppc_stub_plt_call_r2save)
12623 stub_entry->stub_type = stub_type;
12624 continue;
12625 }
12626
12627 stub_entry = ppc_add_stub (stub_name, section, info);
12628 if (stub_entry == NULL)
12629 {
12630 free (stub_name);
12631 error_ret_free_internal:
12632 if (elf_section_data (section)->relocs == NULL)
12633 free (internal_relocs);
12634 error_ret_free_local:
12635 if (local_syms != NULL
12636 && (symtab_hdr->contents
12637 != (unsigned char *) local_syms))
12638 free (local_syms);
12639 return FALSE;
12640 }
12641
12642 stub_entry->stub_type = stub_type;
12643 if (stub_type != ppc_stub_plt_call
12644 && stub_type != ppc_stub_plt_call_r2save)
12645 {
12646 stub_entry->target_value = code_value;
12647 stub_entry->target_section = code_sec;
12648 }
12649 else
12650 {
12651 stub_entry->target_value = sym_value;
12652 stub_entry->target_section = sym_sec;
12653 }
12654 stub_entry->h = hash;
12655 stub_entry->plt_ent = plt_ent;
12656 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12657
12658 if (stub_entry->h != NULL)
12659 htab->stub_globals += 1;
12660 }
12661
12662 /* We're done with the internal relocs, free them. */
12663 if (elf_section_data (section)->relocs != internal_relocs)
12664 free (internal_relocs);
12665 }
12666
12667 if (local_syms != NULL
12668 && symtab_hdr->contents != (unsigned char *) local_syms)
12669 {
12670 if (!info->keep_memory)
12671 free (local_syms);
12672 else
12673 symtab_hdr->contents = (unsigned char *) local_syms;
12674 }
12675 }
12676
12677 /* We may have added some stubs. Find out the new size of the
12678 stub sections. */
12679 for (group = htab->group; group != NULL; group = group->next)
12680 if (group->stub_sec != NULL)
12681 {
12682 asection *stub_sec = group->stub_sec;
12683
12684 if (htab->stub_iteration <= STUB_SHRINK_ITER
12685 || stub_sec->rawsize < stub_sec->size)
12686 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12687 stub_sec->rawsize = stub_sec->size;
12688 stub_sec->size = 0;
12689 stub_sec->reloc_count = 0;
12690 stub_sec->flags &= ~SEC_RELOC;
12691 }
12692
12693 htab->brlt->size = 0;
12694 htab->brlt->reloc_count = 0;
12695 htab->brlt->flags &= ~SEC_RELOC;
12696 if (htab->relbrlt != NULL)
12697 htab->relbrlt->size = 0;
12698
12699 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12700
12701 for (group = htab->group; group != NULL; group = group->next)
12702 if (group->needs_save_res)
12703 group->stub_sec->size += htab->sfpr->size;
12704
12705 if (info->emitrelocations
12706 && htab->glink != NULL && htab->glink->size != 0)
12707 {
12708 htab->glink->reloc_count = 1;
12709 htab->glink->flags |= SEC_RELOC;
12710 }
12711
12712 if (htab->glink_eh_frame != NULL
12713 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12714 && htab->glink_eh_frame->output_section->size != 0)
12715 {
12716 size_t size = 0, align = 4;
12717
12718 for (group = htab->group; group != NULL; group = group->next)
12719 if (group->stub_sec != NULL)
12720 size += stub_eh_frame_size (group, align);
12721 if (htab->glink != NULL && htab->glink->size != 0)
12722 size += (24 + align - 1) & -align;
12723 if (size != 0)
12724 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12725 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12726 size = (size + align - 1) & -align;
12727 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12728 htab->glink_eh_frame->size = size;
12729 }
12730
12731 if (htab->params->plt_stub_align != 0)
12732 for (group = htab->group; group != NULL; group = group->next)
12733 if (group->stub_sec != NULL)
12734 group->stub_sec->size = ((group->stub_sec->size
12735 + (1 << htab->params->plt_stub_align) - 1)
12736 & -(1 << htab->params->plt_stub_align));
12737
12738 for (group = htab->group; group != NULL; group = group->next)
12739 if (group->stub_sec != NULL
12740 && group->stub_sec->rawsize != group->stub_sec->size
12741 && (htab->stub_iteration <= STUB_SHRINK_ITER
12742 || group->stub_sec->rawsize < group->stub_sec->size))
12743 break;
12744
12745 if (group == NULL
12746 && (htab->glink_eh_frame == NULL
12747 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12748 break;
12749
12750 /* Ask the linker to do its stuff. */
12751 (*htab->params->layout_sections_again) ();
12752 }
12753
12754 if (htab->glink_eh_frame != NULL
12755 && htab->glink_eh_frame->size != 0)
12756 {
12757 bfd_vma val;
12758 bfd_byte *p, *last_fde;
12759 size_t last_fde_len, size, align, pad;
12760 struct map_stub *group;
12761
12762 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12763 if (p == NULL)
12764 return FALSE;
12765 htab->glink_eh_frame->contents = p;
12766 last_fde = p;
12767 align = 4;
12768
12769 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12770 /* CIE length (rewrite in case little-endian). */
12771 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12772 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12773 p += last_fde_len + 4;
12774
12775 for (group = htab->group; group != NULL; group = group->next)
12776 if (group->stub_sec != NULL)
12777 {
12778 last_fde = p;
12779 last_fde_len = stub_eh_frame_size (group, align) - 4;
12780 /* FDE length. */
12781 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12782 p += 4;
12783 /* CIE pointer. */
12784 val = p - htab->glink_eh_frame->contents;
12785 bfd_put_32 (htab->elf.dynobj, val, p);
12786 p += 4;
12787 /* Offset to stub section, written later. */
12788 p += 4;
12789 /* stub section size. */
12790 bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p);
12791 p += 4;
12792 /* Augmentation. */
12793 p += 1;
12794 if (group->tls_get_addr_opt_bctrl != -1u)
12795 {
12796 unsigned int to_bctrl = group->tls_get_addr_opt_bctrl / 4;
12797
12798 /* This FDE needs more than just the default.
12799 Describe __tls_get_addr_opt stub LR. */
12800 if (to_bctrl < 64)
12801 *p++ = DW_CFA_advance_loc + to_bctrl;
12802 else if (to_bctrl < 256)
12803 {
12804 *p++ = DW_CFA_advance_loc1;
12805 *p++ = to_bctrl;
12806 }
12807 else if (to_bctrl < 65536)
12808 {
12809 *p++ = DW_CFA_advance_loc2;
12810 bfd_put_16 (htab->elf.dynobj, to_bctrl, p);
12811 p += 2;
12812 }
12813 else
12814 {
12815 *p++ = DW_CFA_advance_loc4;
12816 bfd_put_32 (htab->elf.dynobj, to_bctrl, p);
12817 p += 4;
12818 }
12819 *p++ = DW_CFA_offset_extended_sf;
12820 *p++ = 65;
12821 *p++ = -(STK_LINKER (htab) / 8) & 0x7f;
12822 *p++ = DW_CFA_advance_loc + 4;
12823 *p++ = DW_CFA_restore_extended;
12824 *p++ = 65;
12825 }
12826 /* Pad. */
12827 p = last_fde + last_fde_len + 4;
12828 }
12829 if (htab->glink != NULL && htab->glink->size != 0)
12830 {
12831 last_fde = p;
12832 last_fde_len = ((24 + align - 1) & -align) - 4;
12833 /* FDE length. */
12834 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12835 p += 4;
12836 /* CIE pointer. */
12837 val = p - htab->glink_eh_frame->contents;
12838 bfd_put_32 (htab->elf.dynobj, val, p);
12839 p += 4;
12840 /* Offset to .glink, written later. */
12841 p += 4;
12842 /* .glink size. */
12843 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12844 p += 4;
12845 /* Augmentation. */
12846 p += 1;
12847
12848 *p++ = DW_CFA_advance_loc + 1;
12849 *p++ = DW_CFA_register;
12850 *p++ = 65;
12851 *p++ = htab->opd_abi ? 12 : 0;
12852 *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7);
12853 *p++ = DW_CFA_restore_extended;
12854 *p++ = 65;
12855 p += ((24 + align - 1) & -align) - 24;
12856 }
12857 /* Subsume any padding into the last FDE if user .eh_frame
12858 sections are aligned more than glink_eh_frame. Otherwise any
12859 zero padding will be seen as a terminator. */
12860 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12861 size = p - htab->glink_eh_frame->contents;
12862 pad = ((size + align - 1) & -align) - size;
12863 htab->glink_eh_frame->size = size + pad;
12864 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12865 }
12866
12867 maybe_strip_output (info, htab->brlt);
12868 if (htab->glink_eh_frame != NULL)
12869 maybe_strip_output (info, htab->glink_eh_frame);
12870
12871 return TRUE;
12872 }
12873
12874 /* Called after we have determined section placement. If sections
12875 move, we'll be called again. Provide a value for TOCstart. */
12876
12877 bfd_vma
12878 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12879 {
12880 asection *s;
12881 bfd_vma TOCstart, adjust;
12882
12883 if (info != NULL)
12884 {
12885 struct elf_link_hash_entry *h;
12886 struct elf_link_hash_table *htab = elf_hash_table (info);
12887
12888 if (is_elf_hash_table (htab)
12889 && htab->hgot != NULL)
12890 h = htab->hgot;
12891 else
12892 {
12893 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12894 if (is_elf_hash_table (htab))
12895 htab->hgot = h;
12896 }
12897 if (h != NULL
12898 && h->root.type == bfd_link_hash_defined
12899 && !h->root.linker_def
12900 && (!is_elf_hash_table (htab)
12901 || h->def_regular))
12902 {
12903 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12904 + h->root.u.def.section->output_offset
12905 + h->root.u.def.section->output_section->vma);
12906 _bfd_set_gp_value (obfd, TOCstart);
12907 return TOCstart;
12908 }
12909 }
12910
12911 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12912 order. The TOC starts where the first of these sections starts. */
12913 s = bfd_get_section_by_name (obfd, ".got");
12914 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12915 s = bfd_get_section_by_name (obfd, ".toc");
12916 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12917 s = bfd_get_section_by_name (obfd, ".tocbss");
12918 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12919 s = bfd_get_section_by_name (obfd, ".plt");
12920 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12921 {
12922 /* This may happen for
12923 o references to TOC base (SYM@toc / TOC[tc0]) without a
12924 .toc directive
12925 o bad linker script
12926 o --gc-sections and empty TOC sections
12927
12928 FIXME: Warn user? */
12929
12930 /* Look for a likely section. We probably won't even be
12931 using TOCstart. */
12932 for (s = obfd->sections; s != NULL; s = s->next)
12933 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12934 | SEC_EXCLUDE))
12935 == (SEC_ALLOC | SEC_SMALL_DATA))
12936 break;
12937 if (s == NULL)
12938 for (s = obfd->sections; s != NULL; s = s->next)
12939 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12940 == (SEC_ALLOC | SEC_SMALL_DATA))
12941 break;
12942 if (s == NULL)
12943 for (s = obfd->sections; s != NULL; s = s->next)
12944 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12945 == SEC_ALLOC)
12946 break;
12947 if (s == NULL)
12948 for (s = obfd->sections; s != NULL; s = s->next)
12949 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12950 break;
12951 }
12952
12953 TOCstart = 0;
12954 if (s != NULL)
12955 TOCstart = s->output_section->vma + s->output_offset;
12956
12957 /* Force alignment. */
12958 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12959 TOCstart -= adjust;
12960 _bfd_set_gp_value (obfd, TOCstart);
12961
12962 if (info != NULL && s != NULL)
12963 {
12964 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12965
12966 if (htab != NULL)
12967 {
12968 if (htab->elf.hgot != NULL)
12969 {
12970 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12971 htab->elf.hgot->root.u.def.section = s;
12972 }
12973 }
12974 else
12975 {
12976 struct bfd_link_hash_entry *bh = NULL;
12977 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12978 s, TOC_BASE_OFF - adjust,
12979 NULL, FALSE, FALSE, &bh);
12980 }
12981 }
12982 return TOCstart;
12983 }
12984
12985 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12986 write out any global entry stubs. */
12987
12988 static bfd_boolean
12989 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12990 {
12991 struct bfd_link_info *info;
12992 struct ppc_link_hash_table *htab;
12993 struct plt_entry *pent;
12994 asection *s;
12995
12996 if (h->root.type == bfd_link_hash_indirect)
12997 return TRUE;
12998
12999 if (!h->pointer_equality_needed)
13000 return TRUE;
13001
13002 if (h->def_regular)
13003 return TRUE;
13004
13005 info = inf;
13006 htab = ppc_hash_table (info);
13007 if (htab == NULL)
13008 return FALSE;
13009
13010 s = htab->glink;
13011 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
13012 if (pent->plt.offset != (bfd_vma) -1
13013 && pent->addend == 0)
13014 {
13015 bfd_byte *p;
13016 asection *plt;
13017 bfd_vma off;
13018
13019 p = s->contents + h->root.u.def.value;
13020 plt = htab->elf.splt;
13021 if (!htab->elf.dynamic_sections_created
13022 || h->dynindx == -1)
13023 plt = htab->elf.iplt;
13024 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13025 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13026
13027 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13028 {
13029 info->callbacks->einfo
13030 (_("%P: linkage table error against `%T'\n"),
13031 h->root.root.string);
13032 bfd_set_error (bfd_error_bad_value);
13033 htab->stub_error = TRUE;
13034 }
13035
13036 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13037 if (htab->params->emit_stub_syms)
13038 {
13039 size_t len = strlen (h->root.root.string);
13040 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13041
13042 if (name == NULL)
13043 return FALSE;
13044
13045 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13046 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13047 if (h == NULL)
13048 return FALSE;
13049 if (h->root.type == bfd_link_hash_new)
13050 {
13051 h->root.type = bfd_link_hash_defined;
13052 h->root.u.def.section = s;
13053 h->root.u.def.value = p - s->contents;
13054 h->ref_regular = 1;
13055 h->def_regular = 1;
13056 h->ref_regular_nonweak = 1;
13057 h->forced_local = 1;
13058 h->non_elf = 0;
13059 h->root.linker_def = 1;
13060 }
13061 }
13062
13063 if (PPC_HA (off) != 0)
13064 {
13065 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13066 p += 4;
13067 }
13068 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13069 p += 4;
13070 bfd_put_32 (s->owner, MTCTR_R12, p);
13071 p += 4;
13072 bfd_put_32 (s->owner, BCTR, p);
13073 break;
13074 }
13075 return TRUE;
13076 }
13077
13078 /* Build all the stubs associated with the current output file.
13079 The stubs are kept in a hash table attached to the main linker
13080 hash table. This function is called via gldelf64ppc_finish. */
13081
13082 bfd_boolean
13083 ppc64_elf_build_stubs (struct bfd_link_info *info,
13084 char **stats)
13085 {
13086 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13087 struct map_stub *group;
13088 asection *stub_sec;
13089 bfd_byte *p;
13090 int stub_sec_count = 0;
13091
13092 if (htab == NULL)
13093 return FALSE;
13094
13095 /* Allocate memory to hold the linker stubs. */
13096 for (group = htab->group; group != NULL; group = group->next)
13097 if ((stub_sec = group->stub_sec) != NULL
13098 && stub_sec->size != 0)
13099 {
13100 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13101 if (stub_sec->contents == NULL)
13102 return FALSE;
13103 stub_sec->size = 0;
13104 }
13105
13106 if (htab->glink != NULL && htab->glink->size != 0)
13107 {
13108 unsigned int indx;
13109 bfd_vma plt0;
13110
13111 /* Build the .glink plt call stub. */
13112 if (htab->params->emit_stub_syms)
13113 {
13114 struct elf_link_hash_entry *h;
13115 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13116 TRUE, FALSE, FALSE);
13117 if (h == NULL)
13118 return FALSE;
13119 if (h->root.type == bfd_link_hash_new)
13120 {
13121 h->root.type = bfd_link_hash_defined;
13122 h->root.u.def.section = htab->glink;
13123 h->root.u.def.value = 8;
13124 h->ref_regular = 1;
13125 h->def_regular = 1;
13126 h->ref_regular_nonweak = 1;
13127 h->forced_local = 1;
13128 h->non_elf = 0;
13129 h->root.linker_def = 1;
13130 }
13131 }
13132 plt0 = (htab->elf.splt->output_section->vma
13133 + htab->elf.splt->output_offset
13134 - 16);
13135 if (info->emitrelocations)
13136 {
13137 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13138 if (r == NULL)
13139 return FALSE;
13140 r->r_offset = (htab->glink->output_offset
13141 + htab->glink->output_section->vma);
13142 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13143 r->r_addend = plt0;
13144 }
13145 p = htab->glink->contents;
13146 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13147 bfd_put_64 (htab->glink->owner, plt0, p);
13148 p += 8;
13149 if (htab->opd_abi)
13150 {
13151 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13152 p += 4;
13153 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13154 p += 4;
13155 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13156 p += 4;
13157 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13158 p += 4;
13159 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13160 p += 4;
13161 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13162 p += 4;
13163 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13164 p += 4;
13165 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13166 p += 4;
13167 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13168 p += 4;
13169 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13170 p += 4;
13171 }
13172 else
13173 {
13174 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13175 p += 4;
13176 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13177 p += 4;
13178 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13179 p += 4;
13180 bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p);
13181 p += 4;
13182 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13183 p += 4;
13184 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13185 p += 4;
13186 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13187 p += 4;
13188 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13189 p += 4;
13190 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13191 p += 4;
13192 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13193 p += 4;
13194 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13195 p += 4;
13196 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13197 p += 4;
13198 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13199 p += 4;
13200 }
13201 bfd_put_32 (htab->glink->owner, BCTR, p);
13202 p += 4;
13203 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13204 {
13205 bfd_put_32 (htab->glink->owner, NOP, p);
13206 p += 4;
13207 }
13208
13209 /* Build the .glink lazy link call stubs. */
13210 indx = 0;
13211 while (p < htab->glink->contents + htab->glink->rawsize)
13212 {
13213 if (htab->opd_abi)
13214 {
13215 if (indx < 0x8000)
13216 {
13217 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13218 p += 4;
13219 }
13220 else
13221 {
13222 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13223 p += 4;
13224 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13225 p);
13226 p += 4;
13227 }
13228 }
13229 bfd_put_32 (htab->glink->owner,
13230 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13231 indx++;
13232 p += 4;
13233 }
13234
13235 /* Build .glink global entry stubs. */
13236 if (htab->glink->size > htab->glink->rawsize)
13237 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13238 }
13239
13240 if (htab->brlt != NULL && htab->brlt->size != 0)
13241 {
13242 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13243 htab->brlt->size);
13244 if (htab->brlt->contents == NULL)
13245 return FALSE;
13246 }
13247 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13248 {
13249 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13250 htab->relbrlt->size);
13251 if (htab->relbrlt->contents == NULL)
13252 return FALSE;
13253 }
13254
13255 /* Build the stubs as directed by the stub hash table. */
13256 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13257
13258 for (group = htab->group; group != NULL; group = group->next)
13259 if (group->needs_save_res)
13260 {
13261 stub_sec = group->stub_sec;
13262 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13263 htab->sfpr->size);
13264 if (htab->params->emit_stub_syms)
13265 {
13266 unsigned int i;
13267
13268 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13269 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13270 return FALSE;
13271 }
13272 stub_sec->size += htab->sfpr->size;
13273 }
13274
13275 if (htab->relbrlt != NULL)
13276 htab->relbrlt->reloc_count = 0;
13277
13278 if (htab->params->plt_stub_align != 0)
13279 for (group = htab->group; group != NULL; group = group->next)
13280 if ((stub_sec = group->stub_sec) != NULL)
13281 stub_sec->size = ((stub_sec->size
13282 + (1 << htab->params->plt_stub_align) - 1)
13283 & -(1 << htab->params->plt_stub_align));
13284
13285 for (group = htab->group; group != NULL; group = group->next)
13286 if ((stub_sec = group->stub_sec) != NULL)
13287 {
13288 stub_sec_count += 1;
13289 if (stub_sec->rawsize != stub_sec->size
13290 && (htab->stub_iteration <= STUB_SHRINK_ITER
13291 || stub_sec->rawsize < stub_sec->size))
13292 break;
13293 }
13294
13295 if (group != NULL)
13296 {
13297 htab->stub_error = TRUE;
13298 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13299 }
13300
13301 if (htab->stub_error)
13302 return FALSE;
13303
13304 if (stats != NULL)
13305 {
13306 *stats = bfd_malloc (500);
13307 if (*stats == NULL)
13308 return FALSE;
13309
13310 sprintf (*stats, _("linker stubs in %u group%s\n"
13311 " branch %lu\n"
13312 " toc adjust %lu\n"
13313 " long branch %lu\n"
13314 " long toc adj %lu\n"
13315 " plt call %lu\n"
13316 " plt call toc %lu\n"
13317 " global entry %lu"),
13318 stub_sec_count,
13319 stub_sec_count == 1 ? "" : "s",
13320 htab->stub_count[ppc_stub_long_branch - 1],
13321 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13322 htab->stub_count[ppc_stub_plt_branch - 1],
13323 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13324 htab->stub_count[ppc_stub_plt_call - 1],
13325 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13326 htab->stub_count[ppc_stub_global_entry - 1]);
13327 }
13328 return TRUE;
13329 }
13330
13331 /* What to do when ld finds relocations against symbols defined in
13332 discarded sections. */
13333
13334 static unsigned int
13335 ppc64_elf_action_discarded (asection *sec)
13336 {
13337 if (strcmp (".opd", sec->name) == 0)
13338 return 0;
13339
13340 if (strcmp (".toc", sec->name) == 0)
13341 return 0;
13342
13343 if (strcmp (".toc1", sec->name) == 0)
13344 return 0;
13345
13346 return _bfd_elf_default_action_discarded (sec);
13347 }
13348
13349 /* The RELOCATE_SECTION function is called by the ELF backend linker
13350 to handle the relocations for a section.
13351
13352 The relocs are always passed as Rela structures; if the section
13353 actually uses Rel structures, the r_addend field will always be
13354 zero.
13355
13356 This function is responsible for adjust the section contents as
13357 necessary, and (if using Rela relocs and generating a
13358 relocatable output file) adjusting the reloc addend as
13359 necessary.
13360
13361 This function does not have to worry about setting the reloc
13362 address or the reloc symbol index.
13363
13364 LOCAL_SYMS is a pointer to the swapped in local symbols.
13365
13366 LOCAL_SECTIONS is an array giving the section in the input file
13367 corresponding to the st_shndx field of each local symbol.
13368
13369 The global hash table entry for the global symbols can be found
13370 via elf_sym_hashes (input_bfd).
13371
13372 When generating relocatable output, this function must handle
13373 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13374 going to be the section symbol corresponding to the output
13375 section, which means that the addend must be adjusted
13376 accordingly. */
13377
13378 static bfd_boolean
13379 ppc64_elf_relocate_section (bfd *output_bfd,
13380 struct bfd_link_info *info,
13381 bfd *input_bfd,
13382 asection *input_section,
13383 bfd_byte *contents,
13384 Elf_Internal_Rela *relocs,
13385 Elf_Internal_Sym *local_syms,
13386 asection **local_sections)
13387 {
13388 struct ppc_link_hash_table *htab;
13389 Elf_Internal_Shdr *symtab_hdr;
13390 struct elf_link_hash_entry **sym_hashes;
13391 Elf_Internal_Rela *rel;
13392 Elf_Internal_Rela *wrel;
13393 Elf_Internal_Rela *relend;
13394 Elf_Internal_Rela outrel;
13395 bfd_byte *loc;
13396 struct got_entry **local_got_ents;
13397 bfd_vma TOCstart;
13398 bfd_boolean ret = TRUE;
13399 bfd_boolean is_opd;
13400 /* Assume 'at' branch hints. */
13401 bfd_boolean is_isa_v2 = TRUE;
13402 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13403
13404 /* Initialize howto table if needed. */
13405 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13406 ppc_howto_init ();
13407
13408 htab = ppc_hash_table (info);
13409 if (htab == NULL)
13410 return FALSE;
13411
13412 /* Don't relocate stub sections. */
13413 if (input_section->owner == htab->params->stub_bfd)
13414 return TRUE;
13415
13416 BFD_ASSERT (is_ppc64_elf (input_bfd));
13417
13418 local_got_ents = elf_local_got_ents (input_bfd);
13419 TOCstart = elf_gp (output_bfd);
13420 symtab_hdr = &elf_symtab_hdr (input_bfd);
13421 sym_hashes = elf_sym_hashes (input_bfd);
13422 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13423
13424 rel = wrel = relocs;
13425 relend = relocs + input_section->reloc_count;
13426 for (; rel < relend; wrel++, rel++)
13427 {
13428 enum elf_ppc64_reloc_type r_type;
13429 bfd_vma addend;
13430 bfd_reloc_status_type r;
13431 Elf_Internal_Sym *sym;
13432 asection *sec;
13433 struct elf_link_hash_entry *h_elf;
13434 struct ppc_link_hash_entry *h;
13435 struct ppc_link_hash_entry *fdh;
13436 const char *sym_name;
13437 unsigned long r_symndx, toc_symndx;
13438 bfd_vma toc_addend;
13439 unsigned char tls_mask, tls_gd, tls_type;
13440 unsigned char sym_type;
13441 bfd_vma relocation;
13442 bfd_boolean unresolved_reloc;
13443 bfd_boolean warned;
13444 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13445 unsigned int insn;
13446 unsigned int mask;
13447 struct ppc_stub_hash_entry *stub_entry;
13448 bfd_vma max_br_offset;
13449 bfd_vma from;
13450 Elf_Internal_Rela orig_rel;
13451 reloc_howto_type *howto;
13452 struct reloc_howto_struct alt_howto;
13453
13454 again:
13455 orig_rel = *rel;
13456
13457 r_type = ELF64_R_TYPE (rel->r_info);
13458 r_symndx = ELF64_R_SYM (rel->r_info);
13459
13460 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13461 symbol of the previous ADDR64 reloc. The symbol gives us the
13462 proper TOC base to use. */
13463 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13464 && wrel != relocs
13465 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13466 && is_opd)
13467 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13468
13469 sym = NULL;
13470 sec = NULL;
13471 h_elf = NULL;
13472 sym_name = NULL;
13473 unresolved_reloc = FALSE;
13474 warned = FALSE;
13475
13476 if (r_symndx < symtab_hdr->sh_info)
13477 {
13478 /* It's a local symbol. */
13479 struct _opd_sec_data *opd;
13480
13481 sym = local_syms + r_symndx;
13482 sec = local_sections[r_symndx];
13483 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13484 sym_type = ELF64_ST_TYPE (sym->st_info);
13485 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13486 opd = get_opd_info (sec);
13487 if (opd != NULL && opd->adjust != NULL)
13488 {
13489 long adjust = opd->adjust[OPD_NDX (sym->st_value
13490 + rel->r_addend)];
13491 if (adjust == -1)
13492 relocation = 0;
13493 else
13494 {
13495 /* If this is a relocation against the opd section sym
13496 and we have edited .opd, adjust the reloc addend so
13497 that ld -r and ld --emit-relocs output is correct.
13498 If it is a reloc against some other .opd symbol,
13499 then the symbol value will be adjusted later. */
13500 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13501 rel->r_addend += adjust;
13502 else
13503 relocation += adjust;
13504 }
13505 }
13506 }
13507 else
13508 {
13509 bfd_boolean ignored;
13510
13511 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13512 r_symndx, symtab_hdr, sym_hashes,
13513 h_elf, sec, relocation,
13514 unresolved_reloc, warned, ignored);
13515 sym_name = h_elf->root.root.string;
13516 sym_type = h_elf->type;
13517 if (sec != NULL
13518 && sec->owner == output_bfd
13519 && strcmp (sec->name, ".opd") == 0)
13520 {
13521 /* This is a symbol defined in a linker script. All
13522 such are defined in output sections, even those
13523 defined by simple assignment from a symbol defined in
13524 an input section. Transfer the symbol to an
13525 appropriate input .opd section, so that a branch to
13526 this symbol will be mapped to the location specified
13527 by the opd entry. */
13528 struct bfd_link_order *lo;
13529 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13530 if (lo->type == bfd_indirect_link_order)
13531 {
13532 asection *isec = lo->u.indirect.section;
13533 if (h_elf->root.u.def.value >= isec->output_offset
13534 && h_elf->root.u.def.value < (isec->output_offset
13535 + isec->size))
13536 {
13537 h_elf->root.u.def.value -= isec->output_offset;
13538 h_elf->root.u.def.section = isec;
13539 sec = isec;
13540 break;
13541 }
13542 }
13543 }
13544 }
13545 h = (struct ppc_link_hash_entry *) h_elf;
13546
13547 if (sec != NULL && discarded_section (sec))
13548 {
13549 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13550 input_bfd, input_section,
13551 contents + rel->r_offset);
13552 wrel->r_offset = rel->r_offset;
13553 wrel->r_info = 0;
13554 wrel->r_addend = 0;
13555
13556 /* For ld -r, remove relocations in debug sections against
13557 symbols defined in discarded sections. Not done for
13558 non-debug to preserve relocs in .eh_frame which the
13559 eh_frame editing code expects to be present. */
13560 if (bfd_link_relocatable (info)
13561 && (input_section->flags & SEC_DEBUGGING))
13562 wrel--;
13563
13564 continue;
13565 }
13566
13567 if (bfd_link_relocatable (info))
13568 goto copy_reloc;
13569
13570 if (h != NULL && &h->elf == htab->elf.hgot)
13571 {
13572 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13573 sec = bfd_abs_section_ptr;
13574 unresolved_reloc = FALSE;
13575 }
13576
13577 /* TLS optimizations. Replace instruction sequences and relocs
13578 based on information we collected in tls_optimize. We edit
13579 RELOCS so that --emit-relocs will output something sensible
13580 for the final instruction stream. */
13581 tls_mask = 0;
13582 tls_gd = 0;
13583 toc_symndx = 0;
13584 if (h != NULL)
13585 tls_mask = h->tls_mask;
13586 else if (local_got_ents != NULL)
13587 {
13588 struct plt_entry **local_plt = (struct plt_entry **)
13589 (local_got_ents + symtab_hdr->sh_info);
13590 unsigned char *lgot_masks = (unsigned char *)
13591 (local_plt + symtab_hdr->sh_info);
13592 tls_mask = lgot_masks[r_symndx];
13593 }
13594 if (tls_mask == 0
13595 && (r_type == R_PPC64_TLS
13596 || r_type == R_PPC64_TLSGD
13597 || r_type == R_PPC64_TLSLD))
13598 {
13599 /* Check for toc tls entries. */
13600 unsigned char *toc_tls;
13601
13602 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13603 &local_syms, rel, input_bfd))
13604 return FALSE;
13605
13606 if (toc_tls)
13607 tls_mask = *toc_tls;
13608 }
13609
13610 /* Check that tls relocs are used with tls syms, and non-tls
13611 relocs are used with non-tls syms. */
13612 if (r_symndx != STN_UNDEF
13613 && r_type != R_PPC64_NONE
13614 && (h == NULL
13615 || h->elf.root.type == bfd_link_hash_defined
13616 || h->elf.root.type == bfd_link_hash_defweak)
13617 && (IS_PPC64_TLS_RELOC (r_type)
13618 != (sym_type == STT_TLS
13619 || (sym_type == STT_SECTION
13620 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13621 {
13622 if (tls_mask != 0
13623 && (r_type == R_PPC64_TLS
13624 || r_type == R_PPC64_TLSGD
13625 || r_type == R_PPC64_TLSLD))
13626 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13627 ;
13628 else
13629 info->callbacks->einfo
13630 (!IS_PPC64_TLS_RELOC (r_type)
13631 /* xgettext:c-format */
13632 ? _("%H: %s used with TLS symbol `%T'\n")
13633 /* xgettext:c-format */
13634 : _("%H: %s used with non-TLS symbol `%T'\n"),
13635 input_bfd, input_section, rel->r_offset,
13636 ppc64_elf_howto_table[r_type]->name,
13637 sym_name);
13638 }
13639
13640 /* Ensure reloc mapping code below stays sane. */
13641 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13642 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13643 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13644 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13645 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13646 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13647 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13648 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13649 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13650 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13651 abort ();
13652
13653 switch (r_type)
13654 {
13655 default:
13656 break;
13657
13658 case R_PPC64_LO_DS_OPT:
13659 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13660 if ((insn & (0x3f << 26)) != 58u << 26)
13661 abort ();
13662 insn += (14u << 26) - (58u << 26);
13663 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13664 r_type = R_PPC64_TOC16_LO;
13665 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13666 break;
13667
13668 case R_PPC64_TOC16:
13669 case R_PPC64_TOC16_LO:
13670 case R_PPC64_TOC16_DS:
13671 case R_PPC64_TOC16_LO_DS:
13672 {
13673 /* Check for toc tls entries. */
13674 unsigned char *toc_tls;
13675 int retval;
13676
13677 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13678 &local_syms, rel, input_bfd);
13679 if (retval == 0)
13680 return FALSE;
13681
13682 if (toc_tls)
13683 {
13684 tls_mask = *toc_tls;
13685 if (r_type == R_PPC64_TOC16_DS
13686 || r_type == R_PPC64_TOC16_LO_DS)
13687 {
13688 if (tls_mask != 0
13689 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13690 goto toctprel;
13691 }
13692 else
13693 {
13694 /* If we found a GD reloc pair, then we might be
13695 doing a GD->IE transition. */
13696 if (retval == 2)
13697 {
13698 tls_gd = TLS_TPRELGD;
13699 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13700 goto tls_ldgd_opt;
13701 }
13702 else if (retval == 3)
13703 {
13704 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13705 goto tls_ldgd_opt;
13706 }
13707 }
13708 }
13709 }
13710 break;
13711
13712 case R_PPC64_GOT_TPREL16_HI:
13713 case R_PPC64_GOT_TPREL16_HA:
13714 if (tls_mask != 0
13715 && (tls_mask & TLS_TPREL) == 0)
13716 {
13717 rel->r_offset -= d_offset;
13718 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13719 r_type = R_PPC64_NONE;
13720 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13721 }
13722 break;
13723
13724 case R_PPC64_GOT_TPREL16_DS:
13725 case R_PPC64_GOT_TPREL16_LO_DS:
13726 if (tls_mask != 0
13727 && (tls_mask & TLS_TPREL) == 0)
13728 {
13729 toctprel:
13730 insn = bfd_get_32 (input_bfd,
13731 contents + rel->r_offset - d_offset);
13732 insn &= 31 << 21;
13733 insn |= 0x3c0d0000; /* addis 0,13,0 */
13734 bfd_put_32 (input_bfd, insn,
13735 contents + rel->r_offset - d_offset);
13736 r_type = R_PPC64_TPREL16_HA;
13737 if (toc_symndx != 0)
13738 {
13739 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13740 rel->r_addend = toc_addend;
13741 /* We changed the symbol. Start over in order to
13742 get h, sym, sec etc. right. */
13743 goto again;
13744 }
13745 else
13746 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13747 }
13748 break;
13749
13750 case R_PPC64_TLS:
13751 if (tls_mask != 0
13752 && (tls_mask & TLS_TPREL) == 0)
13753 {
13754 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13755 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13756 if (insn == 0)
13757 abort ();
13758 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13759 /* Was PPC64_TLS which sits on insn boundary, now
13760 PPC64_TPREL16_LO which is at low-order half-word. */
13761 rel->r_offset += d_offset;
13762 r_type = R_PPC64_TPREL16_LO;
13763 if (toc_symndx != 0)
13764 {
13765 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13766 rel->r_addend = toc_addend;
13767 /* We changed the symbol. Start over in order to
13768 get h, sym, sec etc. right. */
13769 goto again;
13770 }
13771 else
13772 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13773 }
13774 break;
13775
13776 case R_PPC64_GOT_TLSGD16_HI:
13777 case R_PPC64_GOT_TLSGD16_HA:
13778 tls_gd = TLS_TPRELGD;
13779 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13780 goto tls_gdld_hi;
13781 break;
13782
13783 case R_PPC64_GOT_TLSLD16_HI:
13784 case R_PPC64_GOT_TLSLD16_HA:
13785 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13786 {
13787 tls_gdld_hi:
13788 if ((tls_mask & tls_gd) != 0)
13789 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13790 + R_PPC64_GOT_TPREL16_DS);
13791 else
13792 {
13793 rel->r_offset -= d_offset;
13794 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13795 r_type = R_PPC64_NONE;
13796 }
13797 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13798 }
13799 break;
13800
13801 case R_PPC64_GOT_TLSGD16:
13802 case R_PPC64_GOT_TLSGD16_LO:
13803 tls_gd = TLS_TPRELGD;
13804 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13805 goto tls_ldgd_opt;
13806 break;
13807
13808 case R_PPC64_GOT_TLSLD16:
13809 case R_PPC64_GOT_TLSLD16_LO:
13810 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13811 {
13812 unsigned int insn1, insn2;
13813 bfd_vma offset;
13814
13815 tls_ldgd_opt:
13816 offset = (bfd_vma) -1;
13817 /* If not using the newer R_PPC64_TLSGD/LD to mark
13818 __tls_get_addr calls, we must trust that the call
13819 stays with its arg setup insns, ie. that the next
13820 reloc is the __tls_get_addr call associated with
13821 the current reloc. Edit both insns. */
13822 if (input_section->has_tls_get_addr_call
13823 && rel + 1 < relend
13824 && branch_reloc_hash_match (input_bfd, rel + 1,
13825 htab->tls_get_addr,
13826 htab->tls_get_addr_fd))
13827 offset = rel[1].r_offset;
13828 /* We read the low GOT_TLS (or TOC16) insn because we
13829 need to keep the destination reg. It may be
13830 something other than the usual r3, and moved to r3
13831 before the call by intervening code. */
13832 insn1 = bfd_get_32 (input_bfd,
13833 contents + rel->r_offset - d_offset);
13834 if ((tls_mask & tls_gd) != 0)
13835 {
13836 /* IE */
13837 insn1 &= (0x1f << 21) | (0x1f << 16);
13838 insn1 |= 58 << 26; /* ld */
13839 insn2 = 0x7c636a14; /* add 3,3,13 */
13840 if (offset != (bfd_vma) -1)
13841 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13842 if ((tls_mask & TLS_EXPLICIT) == 0)
13843 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13844 + R_PPC64_GOT_TPREL16_DS);
13845 else
13846 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13847 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13848 }
13849 else
13850 {
13851 /* LE */
13852 insn1 &= 0x1f << 21;
13853 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13854 insn2 = 0x38630000; /* addi 3,3,0 */
13855 if (tls_gd == 0)
13856 {
13857 /* Was an LD reloc. */
13858 if (toc_symndx)
13859 sec = local_sections[toc_symndx];
13860 for (r_symndx = 0;
13861 r_symndx < symtab_hdr->sh_info;
13862 r_symndx++)
13863 if (local_sections[r_symndx] == sec)
13864 break;
13865 if (r_symndx >= symtab_hdr->sh_info)
13866 r_symndx = STN_UNDEF;
13867 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13868 if (r_symndx != STN_UNDEF)
13869 rel->r_addend -= (local_syms[r_symndx].st_value
13870 + sec->output_offset
13871 + sec->output_section->vma);
13872 }
13873 else if (toc_symndx != 0)
13874 {
13875 r_symndx = toc_symndx;
13876 rel->r_addend = toc_addend;
13877 }
13878 r_type = R_PPC64_TPREL16_HA;
13879 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13880 if (offset != (bfd_vma) -1)
13881 {
13882 rel[1].r_info = ELF64_R_INFO (r_symndx,
13883 R_PPC64_TPREL16_LO);
13884 rel[1].r_offset = offset + d_offset;
13885 rel[1].r_addend = rel->r_addend;
13886 }
13887 }
13888 bfd_put_32 (input_bfd, insn1,
13889 contents + rel->r_offset - d_offset);
13890 if (offset != (bfd_vma) -1)
13891 bfd_put_32 (input_bfd, insn2, contents + offset);
13892 if ((tls_mask & tls_gd) == 0
13893 && (tls_gd == 0 || toc_symndx != 0))
13894 {
13895 /* We changed the symbol. Start over in order
13896 to get h, sym, sec etc. right. */
13897 goto again;
13898 }
13899 }
13900 break;
13901
13902 case R_PPC64_TLSGD:
13903 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13904 {
13905 unsigned int insn2;
13906 bfd_vma offset = rel->r_offset;
13907
13908 if ((tls_mask & TLS_TPRELGD) != 0)
13909 {
13910 /* IE */
13911 r_type = R_PPC64_NONE;
13912 insn2 = 0x7c636a14; /* add 3,3,13 */
13913 }
13914 else
13915 {
13916 /* LE */
13917 if (toc_symndx != 0)
13918 {
13919 r_symndx = toc_symndx;
13920 rel->r_addend = toc_addend;
13921 }
13922 r_type = R_PPC64_TPREL16_LO;
13923 rel->r_offset = offset + d_offset;
13924 insn2 = 0x38630000; /* addi 3,3,0 */
13925 }
13926 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13927 /* Zap the reloc on the _tls_get_addr call too. */
13928 BFD_ASSERT (offset == rel[1].r_offset);
13929 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13930 bfd_put_32 (input_bfd, insn2, contents + offset);
13931 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13932 goto again;
13933 }
13934 break;
13935
13936 case R_PPC64_TLSLD:
13937 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13938 {
13939 unsigned int insn2;
13940 bfd_vma offset = rel->r_offset;
13941
13942 if (toc_symndx)
13943 sec = local_sections[toc_symndx];
13944 for (r_symndx = 0;
13945 r_symndx < symtab_hdr->sh_info;
13946 r_symndx++)
13947 if (local_sections[r_symndx] == sec)
13948 break;
13949 if (r_symndx >= symtab_hdr->sh_info)
13950 r_symndx = STN_UNDEF;
13951 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13952 if (r_symndx != STN_UNDEF)
13953 rel->r_addend -= (local_syms[r_symndx].st_value
13954 + sec->output_offset
13955 + sec->output_section->vma);
13956
13957 r_type = R_PPC64_TPREL16_LO;
13958 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13959 rel->r_offset = offset + d_offset;
13960 /* Zap the reloc on the _tls_get_addr call too. */
13961 BFD_ASSERT (offset == rel[1].r_offset);
13962 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13963 insn2 = 0x38630000; /* addi 3,3,0 */
13964 bfd_put_32 (input_bfd, insn2, contents + offset);
13965 goto again;
13966 }
13967 break;
13968
13969 case R_PPC64_DTPMOD64:
13970 if (rel + 1 < relend
13971 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13972 && rel[1].r_offset == rel->r_offset + 8)
13973 {
13974 if ((tls_mask & TLS_GD) == 0)
13975 {
13976 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13977 if ((tls_mask & TLS_TPRELGD) != 0)
13978 r_type = R_PPC64_TPREL64;
13979 else
13980 {
13981 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13982 r_type = R_PPC64_NONE;
13983 }
13984 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13985 }
13986 }
13987 else
13988 {
13989 if ((tls_mask & TLS_LD) == 0)
13990 {
13991 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13992 r_type = R_PPC64_NONE;
13993 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13994 }
13995 }
13996 break;
13997
13998 case R_PPC64_TPREL64:
13999 if ((tls_mask & TLS_TPREL) == 0)
14000 {
14001 r_type = R_PPC64_NONE;
14002 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14003 }
14004 break;
14005
14006 case R_PPC64_ENTRY:
14007 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14008 if (!bfd_link_pic (info)
14009 && !info->traditional_format
14010 && relocation + 0x80008000 <= 0xffffffff)
14011 {
14012 unsigned int insn1, insn2;
14013
14014 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14015 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14016 if ((insn1 & ~0xfffc) == LD_R2_0R12
14017 && insn2 == ADD_R2_R2_R12)
14018 {
14019 bfd_put_32 (input_bfd,
14020 LIS_R2 + PPC_HA (relocation),
14021 contents + rel->r_offset);
14022 bfd_put_32 (input_bfd,
14023 ADDI_R2_R2 + PPC_LO (relocation),
14024 contents + rel->r_offset + 4);
14025 }
14026 }
14027 else
14028 {
14029 relocation -= (rel->r_offset
14030 + input_section->output_offset
14031 + input_section->output_section->vma);
14032 if (relocation + 0x80008000 <= 0xffffffff)
14033 {
14034 unsigned int insn1, insn2;
14035
14036 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14037 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14038 if ((insn1 & ~0xfffc) == LD_R2_0R12
14039 && insn2 == ADD_R2_R2_R12)
14040 {
14041 bfd_put_32 (input_bfd,
14042 ADDIS_R2_R12 + PPC_HA (relocation),
14043 contents + rel->r_offset);
14044 bfd_put_32 (input_bfd,
14045 ADDI_R2_R2 + PPC_LO (relocation),
14046 contents + rel->r_offset + 4);
14047 }
14048 }
14049 }
14050 break;
14051
14052 case R_PPC64_REL16_HA:
14053 /* If we are generating a non-PIC executable, edit
14054 . 0: addis 2,12,.TOC.-0b@ha
14055 . addi 2,2,.TOC.-0b@l
14056 used by ELFv2 global entry points to set up r2, to
14057 . lis 2,.TOC.@ha
14058 . addi 2,2,.TOC.@l
14059 if .TOC. is in range. */
14060 if (!bfd_link_pic (info)
14061 && !info->traditional_format
14062 && !htab->opd_abi
14063 && rel->r_addend == d_offset
14064 && h != NULL && &h->elf == htab->elf.hgot
14065 && rel + 1 < relend
14066 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14067 && rel[1].r_offset == rel->r_offset + 4
14068 && rel[1].r_addend == rel->r_addend + 4
14069 && relocation + 0x80008000 <= 0xffffffff)
14070 {
14071 unsigned int insn1, insn2;
14072 bfd_vma offset = rel->r_offset - d_offset;
14073 insn1 = bfd_get_32 (input_bfd, contents + offset);
14074 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14075 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14076 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14077 {
14078 r_type = R_PPC64_ADDR16_HA;
14079 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14080 rel->r_addend -= d_offset;
14081 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14082 rel[1].r_addend -= d_offset + 4;
14083 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14084 }
14085 }
14086 break;
14087 }
14088
14089 /* Handle other relocations that tweak non-addend part of insn. */
14090 insn = 0;
14091 max_br_offset = 1 << 25;
14092 addend = rel->r_addend;
14093 reloc_dest = DEST_NORMAL;
14094 switch (r_type)
14095 {
14096 default:
14097 break;
14098
14099 case R_PPC64_TOCSAVE:
14100 if (relocation + addend == (rel->r_offset
14101 + input_section->output_offset
14102 + input_section->output_section->vma)
14103 && tocsave_find (htab, NO_INSERT,
14104 &local_syms, rel, input_bfd))
14105 {
14106 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14107 if (insn == NOP
14108 || insn == CROR_151515 || insn == CROR_313131)
14109 bfd_put_32 (input_bfd,
14110 STD_R2_0R1 + STK_TOC (htab),
14111 contents + rel->r_offset);
14112 }
14113 break;
14114
14115 /* Branch taken prediction relocations. */
14116 case R_PPC64_ADDR14_BRTAKEN:
14117 case R_PPC64_REL14_BRTAKEN:
14118 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14119 /* Fall through. */
14120
14121 /* Branch not taken prediction relocations. */
14122 case R_PPC64_ADDR14_BRNTAKEN:
14123 case R_PPC64_REL14_BRNTAKEN:
14124 insn |= bfd_get_32 (input_bfd,
14125 contents + rel->r_offset) & ~(0x01 << 21);
14126 /* Fall through. */
14127
14128 case R_PPC64_REL14:
14129 max_br_offset = 1 << 15;
14130 /* Fall through. */
14131
14132 case R_PPC64_REL24:
14133 /* Calls to functions with a different TOC, such as calls to
14134 shared objects, need to alter the TOC pointer. This is
14135 done using a linkage stub. A REL24 branching to these
14136 linkage stubs needs to be followed by a nop, as the nop
14137 will be replaced with an instruction to restore the TOC
14138 base pointer. */
14139 fdh = h;
14140 if (h != NULL
14141 && h->oh != NULL
14142 && h->oh->is_func_descriptor)
14143 fdh = ppc_follow_link (h->oh);
14144 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14145 htab);
14146 if (stub_entry != NULL
14147 && (stub_entry->stub_type == ppc_stub_plt_call
14148 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14149 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14150 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14151 {
14152 bfd_boolean can_plt_call = FALSE;
14153
14154 if (stub_entry->stub_type == ppc_stub_plt_call
14155 && !htab->opd_abi
14156 && htab->params->plt_localentry0 != 0
14157 && is_elfv2_localentry0 (&h->elf))
14158 {
14159 /* The function doesn't use or change r2. */
14160 can_plt_call = TRUE;
14161 }
14162
14163 /* All of these stubs may modify r2, so there must be a
14164 branch and link followed by a nop. The nop is
14165 replaced by an insn to restore r2. */
14166 else if (rel->r_offset + 8 <= input_section->size)
14167 {
14168 unsigned long br;
14169
14170 br = bfd_get_32 (input_bfd,
14171 contents + rel->r_offset);
14172 if ((br & 1) != 0)
14173 {
14174 unsigned long nop;
14175
14176 nop = bfd_get_32 (input_bfd,
14177 contents + rel->r_offset + 4);
14178 if (nop == NOP
14179 || nop == CROR_151515 || nop == CROR_313131)
14180 {
14181 if (h != NULL
14182 && (h == htab->tls_get_addr_fd
14183 || h == htab->tls_get_addr)
14184 && htab->params->tls_get_addr_opt)
14185 {
14186 /* Special stub used, leave nop alone. */
14187 }
14188 else
14189 bfd_put_32 (input_bfd,
14190 LD_R2_0R1 + STK_TOC (htab),
14191 contents + rel->r_offset + 4);
14192 can_plt_call = TRUE;
14193 }
14194 }
14195 }
14196
14197 if (!can_plt_call && h != NULL)
14198 {
14199 const char *name = h->elf.root.root.string;
14200
14201 if (*name == '.')
14202 ++name;
14203
14204 if (strncmp (name, "__libc_start_main", 17) == 0
14205 && (name[17] == 0 || name[17] == '@'))
14206 {
14207 /* Allow crt1 branch to go via a toc adjusting
14208 stub. Other calls that never return could do
14209 the same, if we could detect such. */
14210 can_plt_call = TRUE;
14211 }
14212 }
14213
14214 if (!can_plt_call)
14215 {
14216 /* g++ as of 20130507 emits self-calls without a
14217 following nop. This is arguably wrong since we
14218 have conflicting information. On the one hand a
14219 global symbol and on the other a local call
14220 sequence, but don't error for this special case.
14221 It isn't possible to cheaply verify we have
14222 exactly such a call. Allow all calls to the same
14223 section. */
14224 asection *code_sec = sec;
14225
14226 if (get_opd_info (sec) != NULL)
14227 {
14228 bfd_vma off = (relocation + addend
14229 - sec->output_section->vma
14230 - sec->output_offset);
14231
14232 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14233 }
14234 if (code_sec == input_section)
14235 can_plt_call = TRUE;
14236 }
14237
14238 if (!can_plt_call)
14239 {
14240 if (stub_entry->stub_type == ppc_stub_plt_call
14241 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14242 info->callbacks->einfo
14243 /* xgettext:c-format */
14244 (_("%H: call to `%T' lacks nop, can't restore toc; "
14245 "recompile with -fPIC\n"),
14246 input_bfd, input_section, rel->r_offset, sym_name);
14247 else
14248 info->callbacks->einfo
14249 /* xgettext:c-format */
14250 (_("%H: call to `%T' lacks nop, can't restore toc; "
14251 "(-mcmodel=small toc adjust stub)\n"),
14252 input_bfd, input_section, rel->r_offset, sym_name);
14253
14254 bfd_set_error (bfd_error_bad_value);
14255 ret = FALSE;
14256 }
14257
14258 if (can_plt_call
14259 && (stub_entry->stub_type == ppc_stub_plt_call
14260 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14261 unresolved_reloc = FALSE;
14262 }
14263
14264 if ((stub_entry == NULL
14265 || stub_entry->stub_type == ppc_stub_long_branch
14266 || stub_entry->stub_type == ppc_stub_plt_branch)
14267 && get_opd_info (sec) != NULL)
14268 {
14269 /* The branch destination is the value of the opd entry. */
14270 bfd_vma off = (relocation + addend
14271 - sec->output_section->vma
14272 - sec->output_offset);
14273 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14274 if (dest != (bfd_vma) -1)
14275 {
14276 relocation = dest;
14277 addend = 0;
14278 reloc_dest = DEST_OPD;
14279 }
14280 }
14281
14282 /* If the branch is out of reach we ought to have a long
14283 branch stub. */
14284 from = (rel->r_offset
14285 + input_section->output_offset
14286 + input_section->output_section->vma);
14287
14288 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14289 ? fdh->elf.other
14290 : sym->st_other);
14291
14292 if (stub_entry != NULL
14293 && (stub_entry->stub_type == ppc_stub_long_branch
14294 || stub_entry->stub_type == ppc_stub_plt_branch)
14295 && (r_type == R_PPC64_ADDR14_BRTAKEN
14296 || r_type == R_PPC64_ADDR14_BRNTAKEN
14297 || (relocation + addend - from + max_br_offset
14298 < 2 * max_br_offset)))
14299 /* Don't use the stub if this branch is in range. */
14300 stub_entry = NULL;
14301
14302 if (stub_entry != NULL)
14303 {
14304 /* Munge up the value and addend so that we call the stub
14305 rather than the procedure directly. */
14306 asection *stub_sec = stub_entry->group->stub_sec;
14307
14308 if (stub_entry->stub_type == ppc_stub_save_res)
14309 relocation += (stub_sec->output_offset
14310 + stub_sec->output_section->vma
14311 + stub_sec->size - htab->sfpr->size
14312 - htab->sfpr->output_offset
14313 - htab->sfpr->output_section->vma);
14314 else
14315 relocation = (stub_entry->stub_offset
14316 + stub_sec->output_offset
14317 + stub_sec->output_section->vma);
14318 addend = 0;
14319 reloc_dest = DEST_STUB;
14320
14321 if ((stub_entry->stub_type == ppc_stub_plt_call
14322 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14323 && (ALWAYS_EMIT_R2SAVE
14324 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14325 && rel + 1 < relend
14326 && rel[1].r_offset == rel->r_offset + 4
14327 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14328 relocation += 4;
14329 }
14330
14331 if (insn != 0)
14332 {
14333 if (is_isa_v2)
14334 {
14335 /* Set 'a' bit. This is 0b00010 in BO field for branch
14336 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14337 for branch on CTR insns (BO == 1a00t or 1a01t). */
14338 if ((insn & (0x14 << 21)) == (0x04 << 21))
14339 insn |= 0x02 << 21;
14340 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14341 insn |= 0x08 << 21;
14342 else
14343 break;
14344 }
14345 else
14346 {
14347 /* Invert 'y' bit if not the default. */
14348 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14349 insn ^= 0x01 << 21;
14350 }
14351
14352 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14353 }
14354
14355 /* NOP out calls to undefined weak functions.
14356 We can thus call a weak function without first
14357 checking whether the function is defined. */
14358 else if (h != NULL
14359 && h->elf.root.type == bfd_link_hash_undefweak
14360 && h->elf.dynindx == -1
14361 && r_type == R_PPC64_REL24
14362 && relocation == 0
14363 && addend == 0)
14364 {
14365 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14366 goto copy_reloc;
14367 }
14368 break;
14369 }
14370
14371 /* Set `addend'. */
14372 tls_type = 0;
14373 switch (r_type)
14374 {
14375 default:
14376 info->callbacks->einfo
14377 /* xgettext:c-format */
14378 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14379 input_bfd, (int) r_type, sym_name);
14380
14381 bfd_set_error (bfd_error_bad_value);
14382 ret = FALSE;
14383 goto copy_reloc;
14384
14385 case R_PPC64_NONE:
14386 case R_PPC64_TLS:
14387 case R_PPC64_TLSGD:
14388 case R_PPC64_TLSLD:
14389 case R_PPC64_TOCSAVE:
14390 case R_PPC64_GNU_VTINHERIT:
14391 case R_PPC64_GNU_VTENTRY:
14392 case R_PPC64_ENTRY:
14393 goto copy_reloc;
14394
14395 /* GOT16 relocations. Like an ADDR16 using the symbol's
14396 address in the GOT as relocation value instead of the
14397 symbol's value itself. Also, create a GOT entry for the
14398 symbol and put the symbol value there. */
14399 case R_PPC64_GOT_TLSGD16:
14400 case R_PPC64_GOT_TLSGD16_LO:
14401 case R_PPC64_GOT_TLSGD16_HI:
14402 case R_PPC64_GOT_TLSGD16_HA:
14403 tls_type = TLS_TLS | TLS_GD;
14404 goto dogot;
14405
14406 case R_PPC64_GOT_TLSLD16:
14407 case R_PPC64_GOT_TLSLD16_LO:
14408 case R_PPC64_GOT_TLSLD16_HI:
14409 case R_PPC64_GOT_TLSLD16_HA:
14410 tls_type = TLS_TLS | TLS_LD;
14411 goto dogot;
14412
14413 case R_PPC64_GOT_TPREL16_DS:
14414 case R_PPC64_GOT_TPREL16_LO_DS:
14415 case R_PPC64_GOT_TPREL16_HI:
14416 case R_PPC64_GOT_TPREL16_HA:
14417 tls_type = TLS_TLS | TLS_TPREL;
14418 goto dogot;
14419
14420 case R_PPC64_GOT_DTPREL16_DS:
14421 case R_PPC64_GOT_DTPREL16_LO_DS:
14422 case R_PPC64_GOT_DTPREL16_HI:
14423 case R_PPC64_GOT_DTPREL16_HA:
14424 tls_type = TLS_TLS | TLS_DTPREL;
14425 goto dogot;
14426
14427 case R_PPC64_GOT16:
14428 case R_PPC64_GOT16_LO:
14429 case R_PPC64_GOT16_HI:
14430 case R_PPC64_GOT16_HA:
14431 case R_PPC64_GOT16_DS:
14432 case R_PPC64_GOT16_LO_DS:
14433 dogot:
14434 {
14435 /* Relocation is to the entry for this symbol in the global
14436 offset table. */
14437 asection *got;
14438 bfd_vma *offp;
14439 bfd_vma off;
14440 unsigned long indx = 0;
14441 struct got_entry *ent;
14442
14443 if (tls_type == (TLS_TLS | TLS_LD)
14444 && (h == NULL
14445 || !h->elf.def_dynamic))
14446 ent = ppc64_tlsld_got (input_bfd);
14447 else
14448 {
14449 if (h != NULL)
14450 {
14451 if (!htab->elf.dynamic_sections_created
14452 || h->elf.dynindx == -1
14453 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14454 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf))
14455 /* This is actually a static link, or it is a
14456 -Bsymbolic link and the symbol is defined
14457 locally, or the symbol was forced to be local
14458 because of a version file. */
14459 ;
14460 else
14461 {
14462 indx = h->elf.dynindx;
14463 unresolved_reloc = FALSE;
14464 }
14465 ent = h->elf.got.glist;
14466 }
14467 else
14468 {
14469 if (local_got_ents == NULL)
14470 abort ();
14471 ent = local_got_ents[r_symndx];
14472 }
14473
14474 for (; ent != NULL; ent = ent->next)
14475 if (ent->addend == orig_rel.r_addend
14476 && ent->owner == input_bfd
14477 && ent->tls_type == tls_type)
14478 break;
14479 }
14480
14481 if (ent == NULL)
14482 abort ();
14483 if (ent->is_indirect)
14484 ent = ent->got.ent;
14485 offp = &ent->got.offset;
14486 got = ppc64_elf_tdata (ent->owner)->got;
14487 if (got == NULL)
14488 abort ();
14489
14490 /* The offset must always be a multiple of 8. We use the
14491 least significant bit to record whether we have already
14492 processed this entry. */
14493 off = *offp;
14494 if ((off & 1) != 0)
14495 off &= ~1;
14496 else
14497 {
14498 /* Generate relocs for the dynamic linker, except in
14499 the case of TLSLD where we'll use one entry per
14500 module. */
14501 asection *relgot;
14502 bfd_boolean ifunc;
14503
14504 *offp = off | 1;
14505 relgot = NULL;
14506 ifunc = (h != NULL
14507 ? h->elf.type == STT_GNU_IFUNC
14508 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14509 if (ifunc)
14510 {
14511 relgot = htab->elf.irelplt;
14512 if (indx == 0)
14513 htab->local_ifunc_resolver = 1;
14514 else if (is_static_defined (&h->elf))
14515 htab->maybe_local_ifunc_resolver = 1;
14516 }
14517 else if (indx != 0
14518 || (bfd_link_pic (info)
14519 && (h == NULL
14520 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)
14521 || (tls_type == (TLS_TLS | TLS_LD)
14522 && !h->elf.def_dynamic))
14523 && !(tls_type == (TLS_TLS | TLS_TPREL)
14524 && bfd_link_executable (info)
14525 && SYMBOL_REFERENCES_LOCAL (info, &h->elf))))
14526 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14527 if (relgot != NULL)
14528 {
14529 outrel.r_offset = (got->output_section->vma
14530 + got->output_offset
14531 + off);
14532 outrel.r_addend = addend;
14533 if (tls_type & (TLS_LD | TLS_GD))
14534 {
14535 outrel.r_addend = 0;
14536 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14537 if (tls_type == (TLS_TLS | TLS_GD))
14538 {
14539 loc = relgot->contents;
14540 loc += (relgot->reloc_count++
14541 * sizeof (Elf64_External_Rela));
14542 bfd_elf64_swap_reloca_out (output_bfd,
14543 &outrel, loc);
14544 outrel.r_offset += 8;
14545 outrel.r_addend = addend;
14546 outrel.r_info
14547 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14548 }
14549 }
14550 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14551 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14552 else if (tls_type == (TLS_TLS | TLS_TPREL))
14553 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14554 else if (indx != 0)
14555 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14556 else
14557 {
14558 if (ifunc)
14559 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14560 else
14561 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14562
14563 /* Write the .got section contents for the sake
14564 of prelink. */
14565 loc = got->contents + off;
14566 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14567 loc);
14568 }
14569
14570 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14571 {
14572 outrel.r_addend += relocation;
14573 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14574 {
14575 if (htab->elf.tls_sec == NULL)
14576 outrel.r_addend = 0;
14577 else
14578 outrel.r_addend -= htab->elf.tls_sec->vma;
14579 }
14580 }
14581 loc = relgot->contents;
14582 loc += (relgot->reloc_count++
14583 * sizeof (Elf64_External_Rela));
14584 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14585 }
14586
14587 /* Init the .got section contents here if we're not
14588 emitting a reloc. */
14589 else
14590 {
14591 relocation += addend;
14592 if (tls_type != 0)
14593 {
14594 if (htab->elf.tls_sec == NULL)
14595 relocation = 0;
14596 else
14597 {
14598 if (tls_type & TLS_LD)
14599 relocation = 0;
14600 else
14601 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14602 if (tls_type & TLS_TPREL)
14603 relocation += DTP_OFFSET - TP_OFFSET;
14604 }
14605
14606 if (tls_type & (TLS_GD | TLS_LD))
14607 {
14608 bfd_put_64 (output_bfd, relocation,
14609 got->contents + off + 8);
14610 relocation = 1;
14611 }
14612 }
14613 bfd_put_64 (output_bfd, relocation,
14614 got->contents + off);
14615 }
14616 }
14617
14618 if (off >= (bfd_vma) -2)
14619 abort ();
14620
14621 relocation = got->output_section->vma + got->output_offset + off;
14622 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14623 }
14624 break;
14625
14626 case R_PPC64_PLT16_HA:
14627 case R_PPC64_PLT16_HI:
14628 case R_PPC64_PLT16_LO:
14629 case R_PPC64_PLT32:
14630 case R_PPC64_PLT64:
14631 /* Relocation is to the entry for this symbol in the
14632 procedure linkage table. */
14633 {
14634 struct plt_entry **plt_list = NULL;
14635 if (h != NULL)
14636 plt_list = &h->elf.plt.plist;
14637 else if (local_got_ents != NULL)
14638 {
14639 struct plt_entry **local_plt = (struct plt_entry **)
14640 (local_got_ents + symtab_hdr->sh_info);
14641 unsigned char *local_got_tls_masks = (unsigned char *)
14642 (local_plt + symtab_hdr->sh_info);
14643 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14644 plt_list = local_plt + r_symndx;
14645 }
14646 if (plt_list)
14647 {
14648 struct plt_entry *ent;
14649
14650 for (ent = *plt_list; ent != NULL; ent = ent->next)
14651 if (ent->plt.offset != (bfd_vma) -1
14652 && ent->addend == orig_rel.r_addend)
14653 {
14654 asection *plt;
14655
14656 plt = htab->elf.splt;
14657 if (!htab->elf.dynamic_sections_created
14658 || h == NULL
14659 || h->elf.dynindx == -1)
14660 plt = htab->elf.iplt;
14661 relocation = (plt->output_section->vma
14662 + plt->output_offset
14663 + ent->plt.offset);
14664 addend = 0;
14665 unresolved_reloc = FALSE;
14666 break;
14667 }
14668 }
14669 }
14670 break;
14671
14672 case R_PPC64_TOC:
14673 /* Relocation value is TOC base. */
14674 relocation = TOCstart;
14675 if (r_symndx == STN_UNDEF)
14676 relocation += htab->sec_info[input_section->id].toc_off;
14677 else if (unresolved_reloc)
14678 ;
14679 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14680 relocation += htab->sec_info[sec->id].toc_off;
14681 else
14682 unresolved_reloc = TRUE;
14683 goto dodyn;
14684
14685 /* TOC16 relocs. We want the offset relative to the TOC base,
14686 which is the address of the start of the TOC plus 0x8000.
14687 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14688 in this order. */
14689 case R_PPC64_TOC16:
14690 case R_PPC64_TOC16_LO:
14691 case R_PPC64_TOC16_HI:
14692 case R_PPC64_TOC16_DS:
14693 case R_PPC64_TOC16_LO_DS:
14694 case R_PPC64_TOC16_HA:
14695 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14696 break;
14697
14698 /* Relocate against the beginning of the section. */
14699 case R_PPC64_SECTOFF:
14700 case R_PPC64_SECTOFF_LO:
14701 case R_PPC64_SECTOFF_HI:
14702 case R_PPC64_SECTOFF_DS:
14703 case R_PPC64_SECTOFF_LO_DS:
14704 case R_PPC64_SECTOFF_HA:
14705 if (sec != NULL)
14706 addend -= sec->output_section->vma;
14707 break;
14708
14709 case R_PPC64_REL16:
14710 case R_PPC64_REL16_LO:
14711 case R_PPC64_REL16_HI:
14712 case R_PPC64_REL16_HA:
14713 case R_PPC64_REL16DX_HA:
14714 break;
14715
14716 case R_PPC64_REL14:
14717 case R_PPC64_REL14_BRNTAKEN:
14718 case R_PPC64_REL14_BRTAKEN:
14719 case R_PPC64_REL24:
14720 break;
14721
14722 case R_PPC64_TPREL16:
14723 case R_PPC64_TPREL16_LO:
14724 case R_PPC64_TPREL16_HI:
14725 case R_PPC64_TPREL16_HA:
14726 case R_PPC64_TPREL16_DS:
14727 case R_PPC64_TPREL16_LO_DS:
14728 case R_PPC64_TPREL16_HIGH:
14729 case R_PPC64_TPREL16_HIGHA:
14730 case R_PPC64_TPREL16_HIGHER:
14731 case R_PPC64_TPREL16_HIGHERA:
14732 case R_PPC64_TPREL16_HIGHEST:
14733 case R_PPC64_TPREL16_HIGHESTA:
14734 if (h != NULL
14735 && h->elf.root.type == bfd_link_hash_undefweak
14736 && h->elf.dynindx == -1)
14737 {
14738 /* Make this relocation against an undefined weak symbol
14739 resolve to zero. This is really just a tweak, since
14740 code using weak externs ought to check that they are
14741 defined before using them. */
14742 bfd_byte *p = contents + rel->r_offset - d_offset;
14743
14744 insn = bfd_get_32 (input_bfd, p);
14745 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14746 if (insn != 0)
14747 bfd_put_32 (input_bfd, insn, p);
14748 break;
14749 }
14750 if (htab->elf.tls_sec != NULL)
14751 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14752 /* The TPREL16 relocs shouldn't really be used in shared
14753 libs or with non-local symbols as that will result in
14754 DT_TEXTREL being set, but support them anyway. */
14755 goto dodyn;
14756
14757 case R_PPC64_DTPREL16:
14758 case R_PPC64_DTPREL16_LO:
14759 case R_PPC64_DTPREL16_HI:
14760 case R_PPC64_DTPREL16_HA:
14761 case R_PPC64_DTPREL16_DS:
14762 case R_PPC64_DTPREL16_LO_DS:
14763 case R_PPC64_DTPREL16_HIGH:
14764 case R_PPC64_DTPREL16_HIGHA:
14765 case R_PPC64_DTPREL16_HIGHER:
14766 case R_PPC64_DTPREL16_HIGHERA:
14767 case R_PPC64_DTPREL16_HIGHEST:
14768 case R_PPC64_DTPREL16_HIGHESTA:
14769 if (htab->elf.tls_sec != NULL)
14770 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14771 break;
14772
14773 case R_PPC64_ADDR64_LOCAL:
14774 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14775 ? h->elf.other
14776 : sym->st_other);
14777 break;
14778
14779 case R_PPC64_DTPMOD64:
14780 relocation = 1;
14781 addend = 0;
14782 goto dodyn;
14783
14784 case R_PPC64_TPREL64:
14785 if (htab->elf.tls_sec != NULL)
14786 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14787 goto dodyn;
14788
14789 case R_PPC64_DTPREL64:
14790 if (htab->elf.tls_sec != NULL)
14791 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14792 /* Fall through. */
14793
14794 /* Relocations that may need to be propagated if this is a
14795 dynamic object. */
14796 case R_PPC64_REL30:
14797 case R_PPC64_REL32:
14798 case R_PPC64_REL64:
14799 case R_PPC64_ADDR14:
14800 case R_PPC64_ADDR14_BRNTAKEN:
14801 case R_PPC64_ADDR14_BRTAKEN:
14802 case R_PPC64_ADDR16:
14803 case R_PPC64_ADDR16_DS:
14804 case R_PPC64_ADDR16_HA:
14805 case R_PPC64_ADDR16_HI:
14806 case R_PPC64_ADDR16_HIGH:
14807 case R_PPC64_ADDR16_HIGHA:
14808 case R_PPC64_ADDR16_HIGHER:
14809 case R_PPC64_ADDR16_HIGHERA:
14810 case R_PPC64_ADDR16_HIGHEST:
14811 case R_PPC64_ADDR16_HIGHESTA:
14812 case R_PPC64_ADDR16_LO:
14813 case R_PPC64_ADDR16_LO_DS:
14814 case R_PPC64_ADDR24:
14815 case R_PPC64_ADDR32:
14816 case R_PPC64_ADDR64:
14817 case R_PPC64_UADDR16:
14818 case R_PPC64_UADDR32:
14819 case R_PPC64_UADDR64:
14820 dodyn:
14821 if ((input_section->flags & SEC_ALLOC) == 0)
14822 break;
14823
14824 if (NO_OPD_RELOCS && is_opd)
14825 break;
14826
14827 if (bfd_link_pic (info)
14828 ? ((h == NULL
14829 || h->dyn_relocs != NULL)
14830 && ((h != NULL && pc_dynrelocs (h))
14831 || must_be_dyn_reloc (info, r_type)))
14832 : (h != NULL
14833 ? h->dyn_relocs != NULL
14834 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14835 {
14836 bfd_boolean skip, relocate;
14837 asection *sreloc;
14838 bfd_vma out_off;
14839 long indx = 0;
14840
14841 /* When generating a dynamic object, these relocations
14842 are copied into the output file to be resolved at run
14843 time. */
14844
14845 skip = FALSE;
14846 relocate = FALSE;
14847
14848 out_off = _bfd_elf_section_offset (output_bfd, info,
14849 input_section, rel->r_offset);
14850 if (out_off == (bfd_vma) -1)
14851 skip = TRUE;
14852 else if (out_off == (bfd_vma) -2)
14853 skip = TRUE, relocate = TRUE;
14854 out_off += (input_section->output_section->vma
14855 + input_section->output_offset);
14856 outrel.r_offset = out_off;
14857 outrel.r_addend = rel->r_addend;
14858
14859 /* Optimize unaligned reloc use. */
14860 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14861 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14862 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14863 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14864 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14865 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14866 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14867 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14868 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14869
14870 if (skip)
14871 memset (&outrel, 0, sizeof outrel);
14872 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14873 && !is_opd
14874 && r_type != R_PPC64_TOC)
14875 {
14876 indx = h->elf.dynindx;
14877 BFD_ASSERT (indx != -1);
14878 outrel.r_info = ELF64_R_INFO (indx, r_type);
14879 }
14880 else
14881 {
14882 /* This symbol is local, or marked to become local,
14883 or this is an opd section reloc which must point
14884 at a local function. */
14885 outrel.r_addend += relocation;
14886 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14887 {
14888 if (is_opd && h != NULL)
14889 {
14890 /* Lie about opd entries. This case occurs
14891 when building shared libraries and we
14892 reference a function in another shared
14893 lib. The same thing happens for a weak
14894 definition in an application that's
14895 overridden by a strong definition in a
14896 shared lib. (I believe this is a generic
14897 bug in binutils handling of weak syms.)
14898 In these cases we won't use the opd
14899 entry in this lib. */
14900 unresolved_reloc = FALSE;
14901 }
14902 if (!is_opd
14903 && r_type == R_PPC64_ADDR64
14904 && (h != NULL
14905 ? h->elf.type == STT_GNU_IFUNC
14906 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14907 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14908 else
14909 {
14910 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14911
14912 /* We need to relocate .opd contents for ld.so.
14913 Prelink also wants simple and consistent rules
14914 for relocs. This make all RELATIVE relocs have
14915 *r_offset equal to r_addend. */
14916 relocate = TRUE;
14917 }
14918 }
14919 else
14920 {
14921 if (h != NULL
14922 ? h->elf.type == STT_GNU_IFUNC
14923 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14924 {
14925 info->callbacks->einfo
14926 /* xgettext:c-format */
14927 (_("%H: %s for indirect "
14928 "function `%T' unsupported\n"),
14929 input_bfd, input_section, rel->r_offset,
14930 ppc64_elf_howto_table[r_type]->name,
14931 sym_name);
14932 ret = FALSE;
14933 }
14934 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14935 ;
14936 else if (sec == NULL || sec->owner == NULL)
14937 {
14938 bfd_set_error (bfd_error_bad_value);
14939 return FALSE;
14940 }
14941 else
14942 {
14943 asection *osec;
14944
14945 osec = sec->output_section;
14946 indx = elf_section_data (osec)->dynindx;
14947
14948 if (indx == 0)
14949 {
14950 if ((osec->flags & SEC_READONLY) == 0
14951 && htab->elf.data_index_section != NULL)
14952 osec = htab->elf.data_index_section;
14953 else
14954 osec = htab->elf.text_index_section;
14955 indx = elf_section_data (osec)->dynindx;
14956 }
14957 BFD_ASSERT (indx != 0);
14958
14959 /* We are turning this relocation into one
14960 against a section symbol, so subtract out
14961 the output section's address but not the
14962 offset of the input section in the output
14963 section. */
14964 outrel.r_addend -= osec->vma;
14965 }
14966
14967 outrel.r_info = ELF64_R_INFO (indx, r_type);
14968 }
14969 }
14970
14971 sreloc = elf_section_data (input_section)->sreloc;
14972 if (h != NULL
14973 ? h->elf.type == STT_GNU_IFUNC
14974 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14975 {
14976 sreloc = htab->elf.irelplt;
14977 if (indx == 0)
14978 htab->local_ifunc_resolver = 1;
14979 else if (is_static_defined (&h->elf))
14980 htab->maybe_local_ifunc_resolver = 1;
14981 }
14982 if (sreloc == NULL)
14983 abort ();
14984
14985 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14986 >= sreloc->size)
14987 abort ();
14988 loc = sreloc->contents;
14989 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14990 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14991
14992 /* If this reloc is against an external symbol, it will
14993 be computed at runtime, so there's no need to do
14994 anything now. However, for the sake of prelink ensure
14995 that the section contents are a known value. */
14996 if (! relocate)
14997 {
14998 unresolved_reloc = FALSE;
14999 /* The value chosen here is quite arbitrary as ld.so
15000 ignores section contents except for the special
15001 case of .opd where the contents might be accessed
15002 before relocation. Choose zero, as that won't
15003 cause reloc overflow. */
15004 relocation = 0;
15005 addend = 0;
15006 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15007 to improve backward compatibility with older
15008 versions of ld. */
15009 if (r_type == R_PPC64_ADDR64)
15010 addend = outrel.r_addend;
15011 /* Adjust pc_relative relocs to have zero in *r_offset. */
15012 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15013 addend = outrel.r_offset;
15014 }
15015 }
15016 break;
15017
15018 case R_PPC64_COPY:
15019 case R_PPC64_GLOB_DAT:
15020 case R_PPC64_JMP_SLOT:
15021 case R_PPC64_JMP_IREL:
15022 case R_PPC64_RELATIVE:
15023 /* We shouldn't ever see these dynamic relocs in relocatable
15024 files. */
15025 /* Fall through. */
15026
15027 case R_PPC64_PLTGOT16:
15028 case R_PPC64_PLTGOT16_DS:
15029 case R_PPC64_PLTGOT16_HA:
15030 case R_PPC64_PLTGOT16_HI:
15031 case R_PPC64_PLTGOT16_LO:
15032 case R_PPC64_PLTGOT16_LO_DS:
15033 case R_PPC64_PLTREL32:
15034 case R_PPC64_PLTREL64:
15035 /* These ones haven't been implemented yet. */
15036
15037 info->callbacks->einfo
15038 /* xgettext:c-format */
15039 (_("%P: %B: %s is not supported for `%T'\n"),
15040 input_bfd,
15041 ppc64_elf_howto_table[r_type]->name, sym_name);
15042
15043 bfd_set_error (bfd_error_invalid_operation);
15044 ret = FALSE;
15045 goto copy_reloc;
15046 }
15047
15048 /* Multi-instruction sequences that access the TOC can be
15049 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15050 to nop; addi rb,r2,x; */
15051 howto = ppc64_elf_howto_table[(int) r_type];
15052 switch (r_type)
15053 {
15054 default:
15055 break;
15056
15057 case R_PPC64_GOT_TLSLD16_HI:
15058 case R_PPC64_GOT_TLSGD16_HI:
15059 case R_PPC64_GOT_TPREL16_HI:
15060 case R_PPC64_GOT_DTPREL16_HI:
15061 case R_PPC64_GOT16_HI:
15062 case R_PPC64_TOC16_HI:
15063 /* These relocs would only be useful if building up an
15064 offset to later add to r2, perhaps in an indexed
15065 addressing mode instruction. Don't try to optimize.
15066 Unfortunately, the possibility of someone building up an
15067 offset like this or even with the HA relocs, means that
15068 we need to check the high insn when optimizing the low
15069 insn. */
15070 break;
15071
15072 case R_PPC64_GOT_TLSLD16_HA:
15073 case R_PPC64_GOT_TLSGD16_HA:
15074 case R_PPC64_GOT_TPREL16_HA:
15075 case R_PPC64_GOT_DTPREL16_HA:
15076 case R_PPC64_GOT16_HA:
15077 case R_PPC64_TOC16_HA:
15078 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15079 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15080 {
15081 bfd_byte *p = contents + (rel->r_offset & ~3);
15082 bfd_put_32 (input_bfd, NOP, p);
15083 }
15084 break;
15085
15086 case R_PPC64_GOT_TLSLD16_LO:
15087 case R_PPC64_GOT_TLSGD16_LO:
15088 case R_PPC64_GOT_TPREL16_LO_DS:
15089 case R_PPC64_GOT_DTPREL16_LO_DS:
15090 case R_PPC64_GOT16_LO:
15091 case R_PPC64_GOT16_LO_DS:
15092 case R_PPC64_TOC16_LO:
15093 case R_PPC64_TOC16_LO_DS:
15094 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15095 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15096 {
15097 bfd_byte *p = contents + (rel->r_offset & ~3);
15098 insn = bfd_get_32 (input_bfd, p);
15099 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15100 {
15101 /* Transform addic to addi when we change reg. */
15102 insn &= ~((0x3f << 26) | (0x1f << 16));
15103 insn |= (14u << 26) | (2 << 16);
15104 }
15105 else
15106 {
15107 insn &= ~(0x1f << 16);
15108 insn |= 2 << 16;
15109 }
15110 bfd_put_32 (input_bfd, insn, p);
15111 }
15112 break;
15113
15114 case R_PPC64_TPREL16_HA:
15115 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15116 {
15117 bfd_byte *p = contents + (rel->r_offset & ~3);
15118 insn = bfd_get_32 (input_bfd, p);
15119 if ((insn & ((0x3f << 26) | 0x1f << 16))
15120 != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */)
15121 /* xgettext:c-format */
15122 info->callbacks->minfo
15123 (_("%H: warning: %s unexpected insn %#x.\n"),
15124 input_bfd, input_section, rel->r_offset, howto->name, insn);
15125 else
15126 bfd_put_32 (input_bfd, NOP, p);
15127 }
15128 break;
15129
15130 case R_PPC64_TPREL16_LO:
15131 case R_PPC64_TPREL16_LO_DS:
15132 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
15133 {
15134 bfd_byte *p = contents + (rel->r_offset & ~3);
15135 insn = bfd_get_32 (input_bfd, p);
15136 insn &= ~(0x1f << 16);
15137 insn |= 13 << 16;
15138 bfd_put_32 (input_bfd, insn, p);
15139 }
15140 break;
15141 }
15142
15143 /* Do any further special processing. */
15144 switch (r_type)
15145 {
15146 default:
15147 break;
15148
15149 case R_PPC64_REL16_HA:
15150 case R_PPC64_REL16DX_HA:
15151 case R_PPC64_ADDR16_HA:
15152 case R_PPC64_ADDR16_HIGHA:
15153 case R_PPC64_ADDR16_HIGHERA:
15154 case R_PPC64_ADDR16_HIGHESTA:
15155 case R_PPC64_TOC16_HA:
15156 case R_PPC64_SECTOFF_HA:
15157 case R_PPC64_TPREL16_HA:
15158 case R_PPC64_TPREL16_HIGHA:
15159 case R_PPC64_TPREL16_HIGHERA:
15160 case R_PPC64_TPREL16_HIGHESTA:
15161 case R_PPC64_DTPREL16_HA:
15162 case R_PPC64_DTPREL16_HIGHA:
15163 case R_PPC64_DTPREL16_HIGHERA:
15164 case R_PPC64_DTPREL16_HIGHESTA:
15165 /* It's just possible that this symbol is a weak symbol
15166 that's not actually defined anywhere. In that case,
15167 'sec' would be NULL, and we should leave the symbol
15168 alone (it will be set to zero elsewhere in the link). */
15169 if (sec == NULL)
15170 break;
15171 /* Fall through. */
15172
15173 case R_PPC64_GOT16_HA:
15174 case R_PPC64_PLTGOT16_HA:
15175 case R_PPC64_PLT16_HA:
15176 case R_PPC64_GOT_TLSGD16_HA:
15177 case R_PPC64_GOT_TLSLD16_HA:
15178 case R_PPC64_GOT_TPREL16_HA:
15179 case R_PPC64_GOT_DTPREL16_HA:
15180 /* Add 0x10000 if sign bit in 0:15 is set.
15181 Bits 0:15 are not used. */
15182 addend += 0x8000;
15183 break;
15184
15185 case R_PPC64_ADDR16_DS:
15186 case R_PPC64_ADDR16_LO_DS:
15187 case R_PPC64_GOT16_DS:
15188 case R_PPC64_GOT16_LO_DS:
15189 case R_PPC64_PLT16_LO_DS:
15190 case R_PPC64_SECTOFF_DS:
15191 case R_PPC64_SECTOFF_LO_DS:
15192 case R_PPC64_TOC16_DS:
15193 case R_PPC64_TOC16_LO_DS:
15194 case R_PPC64_PLTGOT16_DS:
15195 case R_PPC64_PLTGOT16_LO_DS:
15196 case R_PPC64_GOT_TPREL16_DS:
15197 case R_PPC64_GOT_TPREL16_LO_DS:
15198 case R_PPC64_GOT_DTPREL16_DS:
15199 case R_PPC64_GOT_DTPREL16_LO_DS:
15200 case R_PPC64_TPREL16_DS:
15201 case R_PPC64_TPREL16_LO_DS:
15202 case R_PPC64_DTPREL16_DS:
15203 case R_PPC64_DTPREL16_LO_DS:
15204 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15205 mask = 3;
15206 /* If this reloc is against an lq, lxv, or stxv insn, then
15207 the value must be a multiple of 16. This is somewhat of
15208 a hack, but the "correct" way to do this by defining _DQ
15209 forms of all the _DS relocs bloats all reloc switches in
15210 this file. It doesn't make much sense to use these
15211 relocs in data, so testing the insn should be safe. */
15212 if ((insn & (0x3f << 26)) == (56u << 26)
15213 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15214 mask = 15;
15215 relocation += addend;
15216 addend = insn & (mask ^ 3);
15217 if ((relocation & mask) != 0)
15218 {
15219 relocation ^= relocation & mask;
15220 info->callbacks->einfo
15221 /* xgettext:c-format */
15222 (_("%H: error: %s not a multiple of %u\n"),
15223 input_bfd, input_section, rel->r_offset,
15224 howto->name,
15225 mask + 1);
15226 bfd_set_error (bfd_error_bad_value);
15227 ret = FALSE;
15228 goto copy_reloc;
15229 }
15230 break;
15231 }
15232
15233 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15234 because such sections are not SEC_ALLOC and thus ld.so will
15235 not process them. */
15236 if (unresolved_reloc
15237 && !((input_section->flags & SEC_DEBUGGING) != 0
15238 && h->elf.def_dynamic)
15239 && _bfd_elf_section_offset (output_bfd, info, input_section,
15240 rel->r_offset) != (bfd_vma) -1)
15241 {
15242 info->callbacks->einfo
15243 /* xgettext:c-format */
15244 (_("%H: unresolvable %s against `%T'\n"),
15245 input_bfd, input_section, rel->r_offset,
15246 howto->name,
15247 h->elf.root.root.string);
15248 ret = FALSE;
15249 }
15250
15251 /* 16-bit fields in insns mostly have signed values, but a
15252 few insns have 16-bit unsigned values. Really, we should
15253 have different reloc types. */
15254 if (howto->complain_on_overflow != complain_overflow_dont
15255 && howto->dst_mask == 0xffff
15256 && (input_section->flags & SEC_CODE) != 0)
15257 {
15258 enum complain_overflow complain = complain_overflow_signed;
15259
15260 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15261 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15262 complain = complain_overflow_bitfield;
15263 else if (howto->rightshift == 0
15264 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15265 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15266 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15267 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15268 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15269 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15270 complain = complain_overflow_unsigned;
15271 if (howto->complain_on_overflow != complain)
15272 {
15273 alt_howto = *howto;
15274 alt_howto.complain_on_overflow = complain;
15275 howto = &alt_howto;
15276 }
15277 }
15278
15279 if (r_type == R_PPC64_REL16DX_HA)
15280 {
15281 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15282 if (rel->r_offset + 4 > input_section->size)
15283 r = bfd_reloc_outofrange;
15284 else
15285 {
15286 relocation += addend;
15287 relocation -= (rel->r_offset
15288 + input_section->output_offset
15289 + input_section->output_section->vma);
15290 relocation = (bfd_signed_vma) relocation >> 16;
15291 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15292 insn &= ~0x1fffc1;
15293 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15294 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15295 r = bfd_reloc_ok;
15296 if (relocation + 0x8000 > 0xffff)
15297 r = bfd_reloc_overflow;
15298 }
15299 }
15300 else
15301 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15302 rel->r_offset, relocation, addend);
15303
15304 if (r != bfd_reloc_ok)
15305 {
15306 char *more_info = NULL;
15307 const char *reloc_name = howto->name;
15308
15309 if (reloc_dest != DEST_NORMAL)
15310 {
15311 more_info = bfd_malloc (strlen (reloc_name) + 8);
15312 if (more_info != NULL)
15313 {
15314 strcpy (more_info, reloc_name);
15315 strcat (more_info, (reloc_dest == DEST_OPD
15316 ? " (OPD)" : " (stub)"));
15317 reloc_name = more_info;
15318 }
15319 }
15320
15321 if (r == bfd_reloc_overflow)
15322 {
15323 /* On code like "if (foo) foo();" don't report overflow
15324 on a branch to zero when foo is undefined. */
15325 if (!warned
15326 && (reloc_dest == DEST_STUB
15327 || !(h != NULL
15328 && (h->elf.root.type == bfd_link_hash_undefweak
15329 || h->elf.root.type == bfd_link_hash_undefined)
15330 && is_branch_reloc (r_type))))
15331 info->callbacks->reloc_overflow (info, &h->elf.root,
15332 sym_name, reloc_name,
15333 orig_rel.r_addend,
15334 input_bfd, input_section,
15335 rel->r_offset);
15336 }
15337 else
15338 {
15339 info->callbacks->einfo
15340 /* xgettext:c-format */
15341 (_("%H: %s against `%T': error %d\n"),
15342 input_bfd, input_section, rel->r_offset,
15343 reloc_name, sym_name, (int) r);
15344 ret = FALSE;
15345 }
15346 if (more_info != NULL)
15347 free (more_info);
15348 }
15349 copy_reloc:
15350 if (wrel != rel)
15351 *wrel = *rel;
15352 }
15353
15354 if (wrel != rel)
15355 {
15356 Elf_Internal_Shdr *rel_hdr;
15357 size_t deleted = rel - wrel;
15358
15359 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15360 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15361 if (rel_hdr->sh_size == 0)
15362 {
15363 /* It is too late to remove an empty reloc section. Leave
15364 one NONE reloc.
15365 ??? What is wrong with an empty section??? */
15366 rel_hdr->sh_size = rel_hdr->sh_entsize;
15367 deleted -= 1;
15368 }
15369 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15370 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15371 input_section->reloc_count -= deleted;
15372 }
15373
15374 /* If we're emitting relocations, then shortly after this function
15375 returns, reloc offsets and addends for this section will be
15376 adjusted. Worse, reloc symbol indices will be for the output
15377 file rather than the input. Save a copy of the relocs for
15378 opd_entry_value. */
15379 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15380 {
15381 bfd_size_type amt;
15382 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15383 rel = bfd_alloc (input_bfd, amt);
15384 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15385 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15386 if (rel == NULL)
15387 return FALSE;
15388 memcpy (rel, relocs, amt);
15389 }
15390 return ret;
15391 }
15392
15393 /* Adjust the value of any local symbols in opd sections. */
15394
15395 static int
15396 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15397 const char *name ATTRIBUTE_UNUSED,
15398 Elf_Internal_Sym *elfsym,
15399 asection *input_sec,
15400 struct elf_link_hash_entry *h)
15401 {
15402 struct _opd_sec_data *opd;
15403 long adjust;
15404 bfd_vma value;
15405
15406 if (h != NULL)
15407 return 1;
15408
15409 opd = get_opd_info (input_sec);
15410 if (opd == NULL || opd->adjust == NULL)
15411 return 1;
15412
15413 value = elfsym->st_value - input_sec->output_offset;
15414 if (!bfd_link_relocatable (info))
15415 value -= input_sec->output_section->vma;
15416
15417 adjust = opd->adjust[OPD_NDX (value)];
15418 if (adjust == -1)
15419 return 2;
15420
15421 elfsym->st_value += adjust;
15422 return 1;
15423 }
15424
15425 /* Finish up dynamic symbol handling. We set the contents of various
15426 dynamic sections here. */
15427
15428 static bfd_boolean
15429 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15430 struct bfd_link_info *info,
15431 struct elf_link_hash_entry *h,
15432 Elf_Internal_Sym *sym)
15433 {
15434 struct ppc_link_hash_table *htab;
15435 struct plt_entry *ent;
15436 Elf_Internal_Rela rela;
15437 bfd_byte *loc;
15438
15439 htab = ppc_hash_table (info);
15440 if (htab == NULL)
15441 return FALSE;
15442
15443 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15444 if (ent->plt.offset != (bfd_vma) -1)
15445 {
15446 /* This symbol has an entry in the procedure linkage
15447 table. Set it up. */
15448 if (!htab->elf.dynamic_sections_created
15449 || h->dynindx == -1)
15450 {
15451 BFD_ASSERT (h->type == STT_GNU_IFUNC
15452 && h->def_regular
15453 && (h->root.type == bfd_link_hash_defined
15454 || h->root.type == bfd_link_hash_defweak));
15455 rela.r_offset = (htab->elf.iplt->output_section->vma
15456 + htab->elf.iplt->output_offset
15457 + ent->plt.offset);
15458 if (htab->opd_abi)
15459 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15460 else
15461 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15462 rela.r_addend = (h->root.u.def.value
15463 + h->root.u.def.section->output_offset
15464 + h->root.u.def.section->output_section->vma
15465 + ent->addend);
15466 loc = (htab->elf.irelplt->contents
15467 + (htab->elf.irelplt->reloc_count++
15468 * sizeof (Elf64_External_Rela)));
15469 htab->local_ifunc_resolver = 1;
15470 }
15471 else
15472 {
15473 rela.r_offset = (htab->elf.splt->output_section->vma
15474 + htab->elf.splt->output_offset
15475 + ent->plt.offset);
15476 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15477 rela.r_addend = ent->addend;
15478 loc = (htab->elf.srelplt->contents
15479 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15480 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15481 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15482 htab->maybe_local_ifunc_resolver = 1;
15483 }
15484 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15485
15486 if (!htab->opd_abi)
15487 {
15488 if (!h->def_regular)
15489 {
15490 /* Mark the symbol as undefined, rather than as
15491 defined in glink. Leave the value if there were
15492 any relocations where pointer equality matters
15493 (this is a clue for the dynamic linker, to make
15494 function pointer comparisons work between an
15495 application and shared library), otherwise set it
15496 to zero. */
15497 sym->st_shndx = SHN_UNDEF;
15498 if (!h->pointer_equality_needed)
15499 sym->st_value = 0;
15500 else if (!h->ref_regular_nonweak)
15501 {
15502 /* This breaks function pointer comparisons, but
15503 that is better than breaking tests for a NULL
15504 function pointer. */
15505 sym->st_value = 0;
15506 }
15507 }
15508 }
15509 }
15510
15511 if (h->needs_copy)
15512 {
15513 /* This symbol needs a copy reloc. Set it up. */
15514 asection *srel;
15515
15516 if (h->dynindx == -1
15517 || (h->root.type != bfd_link_hash_defined
15518 && h->root.type != bfd_link_hash_defweak)
15519 || htab->elf.srelbss == NULL
15520 || htab->elf.sreldynrelro == NULL)
15521 abort ();
15522
15523 rela.r_offset = (h->root.u.def.value
15524 + h->root.u.def.section->output_section->vma
15525 + h->root.u.def.section->output_offset);
15526 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15527 rela.r_addend = 0;
15528 if (h->root.u.def.section == htab->elf.sdynrelro)
15529 srel = htab->elf.sreldynrelro;
15530 else
15531 srel = htab->elf.srelbss;
15532 loc = srel->contents;
15533 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15534 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15535 }
15536
15537 return TRUE;
15538 }
15539
15540 /* Used to decide how to sort relocs in an optimal manner for the
15541 dynamic linker, before writing them out. */
15542
15543 static enum elf_reloc_type_class
15544 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15545 const asection *rel_sec,
15546 const Elf_Internal_Rela *rela)
15547 {
15548 enum elf_ppc64_reloc_type r_type;
15549 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15550
15551 if (rel_sec == htab->elf.irelplt)
15552 return reloc_class_ifunc;
15553
15554 r_type = ELF64_R_TYPE (rela->r_info);
15555 switch (r_type)
15556 {
15557 case R_PPC64_RELATIVE:
15558 return reloc_class_relative;
15559 case R_PPC64_JMP_SLOT:
15560 return reloc_class_plt;
15561 case R_PPC64_COPY:
15562 return reloc_class_copy;
15563 default:
15564 return reloc_class_normal;
15565 }
15566 }
15567
15568 /* Finish up the dynamic sections. */
15569
15570 static bfd_boolean
15571 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15572 struct bfd_link_info *info)
15573 {
15574 struct ppc_link_hash_table *htab;
15575 bfd *dynobj;
15576 asection *sdyn;
15577
15578 htab = ppc_hash_table (info);
15579 if (htab == NULL)
15580 return FALSE;
15581
15582 dynobj = htab->elf.dynobj;
15583 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15584
15585 if (htab->elf.dynamic_sections_created)
15586 {
15587 Elf64_External_Dyn *dyncon, *dynconend;
15588
15589 if (sdyn == NULL || htab->elf.sgot == NULL)
15590 abort ();
15591
15592 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15593 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15594 for (; dyncon < dynconend; dyncon++)
15595 {
15596 Elf_Internal_Dyn dyn;
15597 asection *s;
15598
15599 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15600
15601 switch (dyn.d_tag)
15602 {
15603 default:
15604 continue;
15605
15606 case DT_PPC64_GLINK:
15607 s = htab->glink;
15608 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15609 /* We stupidly defined DT_PPC64_GLINK to be the start
15610 of glink rather than the first entry point, which is
15611 what ld.so needs, and now have a bigger stub to
15612 support automatic multiple TOCs. */
15613 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15614 break;
15615
15616 case DT_PPC64_OPD:
15617 s = bfd_get_section_by_name (output_bfd, ".opd");
15618 if (s == NULL)
15619 continue;
15620 dyn.d_un.d_ptr = s->vma;
15621 break;
15622
15623 case DT_PPC64_OPT:
15624 if (htab->do_multi_toc && htab->multi_toc_needed)
15625 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15626 if (htab->has_plt_localentry0)
15627 dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY;
15628 break;
15629
15630 case DT_PPC64_OPDSZ:
15631 s = bfd_get_section_by_name (output_bfd, ".opd");
15632 if (s == NULL)
15633 continue;
15634 dyn.d_un.d_val = s->size;
15635 break;
15636
15637 case DT_PLTGOT:
15638 s = htab->elf.splt;
15639 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15640 break;
15641
15642 case DT_JMPREL:
15643 s = htab->elf.srelplt;
15644 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15645 break;
15646
15647 case DT_PLTRELSZ:
15648 dyn.d_un.d_val = htab->elf.srelplt->size;
15649 break;
15650
15651 case DT_TEXTREL:
15652 if (htab->local_ifunc_resolver)
15653 info->callbacks->einfo
15654 (_("%X%P: text relocations and GNU indirect "
15655 "functions will result in a segfault at runtime\n"));
15656 else if (htab->maybe_local_ifunc_resolver)
15657 info->callbacks->einfo
15658 (_("%P: warning: text relocations and GNU indirect "
15659 "functions may result in a segfault at runtime\n"));
15660 continue;
15661 }
15662
15663 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15664 }
15665 }
15666
15667 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15668 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15669 {
15670 /* Fill in the first entry in the global offset table.
15671 We use it to hold the link-time TOCbase. */
15672 bfd_put_64 (output_bfd,
15673 elf_gp (output_bfd) + TOC_BASE_OFF,
15674 htab->elf.sgot->contents);
15675
15676 /* Set .got entry size. */
15677 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15678 }
15679
15680 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15681 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15682 {
15683 /* Set .plt entry size. */
15684 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15685 = PLT_ENTRY_SIZE (htab);
15686 }
15687
15688 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15689 brlt ourselves if emitrelocations. */
15690 if (htab->brlt != NULL
15691 && htab->brlt->reloc_count != 0
15692 && !_bfd_elf_link_output_relocs (output_bfd,
15693 htab->brlt,
15694 elf_section_data (htab->brlt)->rela.hdr,
15695 elf_section_data (htab->brlt)->relocs,
15696 NULL))
15697 return FALSE;
15698
15699 if (htab->glink != NULL
15700 && htab->glink->reloc_count != 0
15701 && !_bfd_elf_link_output_relocs (output_bfd,
15702 htab->glink,
15703 elf_section_data (htab->glink)->rela.hdr,
15704 elf_section_data (htab->glink)->relocs,
15705 NULL))
15706 return FALSE;
15707
15708 if (htab->glink_eh_frame != NULL
15709 && htab->glink_eh_frame->size != 0)
15710 {
15711 bfd_vma val;
15712 bfd_byte *p;
15713 struct map_stub *group;
15714 size_t align = 4;
15715
15716 p = htab->glink_eh_frame->contents;
15717 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15718
15719 for (group = htab->group; group != NULL; group = group->next)
15720 if (group->stub_sec != NULL)
15721 {
15722 /* Offset to stub section. */
15723 val = (group->stub_sec->output_section->vma
15724 + group->stub_sec->output_offset);
15725 val -= (htab->glink_eh_frame->output_section->vma
15726 + htab->glink_eh_frame->output_offset
15727 + (p + 8 - htab->glink_eh_frame->contents));
15728 if (val + 0x80000000 > 0xffffffff)
15729 {
15730 info->callbacks->einfo
15731 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15732 group->stub_sec->name);
15733 return FALSE;
15734 }
15735 bfd_put_32 (dynobj, val, p + 8);
15736 p += stub_eh_frame_size (group, align);
15737 }
15738 if (htab->glink != NULL && htab->glink->size != 0)
15739 {
15740 /* Offset to .glink. */
15741 val = (htab->glink->output_section->vma
15742 + htab->glink->output_offset
15743 + 8);
15744 val -= (htab->glink_eh_frame->output_section->vma
15745 + htab->glink_eh_frame->output_offset
15746 + (p + 8 - htab->glink_eh_frame->contents));
15747 if (val + 0x80000000 > 0xffffffff)
15748 {
15749 info->callbacks->einfo
15750 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15751 htab->glink->name);
15752 return FALSE;
15753 }
15754 bfd_put_32 (dynobj, val, p + 8);
15755 p += (24 + align - 1) & -align;
15756 }
15757
15758 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15759 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15760 htab->glink_eh_frame,
15761 htab->glink_eh_frame->contents))
15762 return FALSE;
15763 }
15764
15765 /* We need to handle writing out multiple GOT sections ourselves,
15766 since we didn't add them to DYNOBJ. We know dynobj is the first
15767 bfd. */
15768 while ((dynobj = dynobj->link.next) != NULL)
15769 {
15770 asection *s;
15771
15772 if (!is_ppc64_elf (dynobj))
15773 continue;
15774
15775 s = ppc64_elf_tdata (dynobj)->got;
15776 if (s != NULL
15777 && s->size != 0
15778 && s->output_section != bfd_abs_section_ptr
15779 && !bfd_set_section_contents (output_bfd, s->output_section,
15780 s->contents, s->output_offset,
15781 s->size))
15782 return FALSE;
15783 s = ppc64_elf_tdata (dynobj)->relgot;
15784 if (s != NULL
15785 && s->size != 0
15786 && s->output_section != bfd_abs_section_ptr
15787 && !bfd_set_section_contents (output_bfd, s->output_section,
15788 s->contents, s->output_offset,
15789 s->size))
15790 return FALSE;
15791 }
15792
15793 return TRUE;
15794 }
15795
15796 #include "elf64-target.h"
15797
15798 /* FreeBSD support */
15799
15800 #undef TARGET_LITTLE_SYM
15801 #undef TARGET_LITTLE_NAME
15802
15803 #undef TARGET_BIG_SYM
15804 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15805 #undef TARGET_BIG_NAME
15806 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15807
15808 #undef ELF_OSABI
15809 #define ELF_OSABI ELFOSABI_FREEBSD
15810
15811 #undef elf64_bed
15812 #define elf64_bed elf64_powerpc_fbsd_bed
15813
15814 #include "elf64-target.h"
The GNU Binutils are a collection of binary tools.