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opcodes/
[binutils-gdb.git] / bfd / elf64-ppc.c
blob50dad3b10e64ffe9d1abae32a252fbbbd7fd1a3f
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
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_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_post_process_headers _bfd_elf_set_osabi
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE 24
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
130
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
133
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
137
138 /* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141 #define PLT_CALL_STUB_SIZE (7*4)
142 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148 #define BCTR 0x4e800420 /* bctr */
149
150
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
155
156 #define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160 #define BNECTR 0x4ca20420 /* bnectr+ */
161 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
162
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
165
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
167
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
170 /* 0: */
171 /* .quad plt0-1f */
172 /* __glink: */
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
175 /* 1: */
176 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
177 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
180 /* ld %11,0(%12) */
181 /* ld %2,8(%12) */
182 /* mtctr %11 */
183 /* ld %11,16(%12) */
184 /* bctr */
185
186 /* Pad with this. */
187 #define NOP 0x60000000
188
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
192
193 /* .glink entries for the first 32k functions are two instructions. */
194 #define LI_R0_0 0x38000000 /* li %r0,0 */
195 #define B_DOT 0x48000000 /* b . */
196
197 /* After that, we need two instructions to load the index, followed by
198 a branch. */
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
201
202 /* Instructions used by the save and restore reg functions. */
203 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209 #define LI_R12_0 0x39800000 /* li %r12,0 */
210 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213 #define BLR 0x4e800020 /* blr */
214
215 /* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219 #ifndef NO_OPD_RELOCS
220 #define NO_OPD_RELOCS 0
221 #endif
222 \f
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
224
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
227
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 32, /* bitsize */
234 FALSE, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
240 0, /* src_mask */
241 0, /* dst_mask */
242 FALSE), /* pcrel_offset */
243
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
255 0, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 26, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
277 0, /* rightshift */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
279 16, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
292 0, /* rightshift */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
294 16, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
307 16, /* rightshift */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
339 0, /* rightshift */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 26, /* bitsize */
391 TRUE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
400
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 TRUE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
415
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
418 zero. */
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
435 be zero. */
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
451 symbol. */
452 HOWTO (R_PPC64_GOT16, /* type */
453 0, /* rightshift */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
467 the symbol. */
468 HOWTO (R_PPC64_GOT16_LO, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_HI, /* type */
485 16, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HA, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
520 0, /* rightshift */
521 0, /* this one is variable size */
522 0, /* bitsize */
523 FALSE, /* pc_relative */
524 0, /* bitpos */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
529 0, /* src_mask */
530 0, /* dst_mask */
531 FALSE), /* pcrel_offset */
532
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
534 entries. */
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
536 0, /* rightshift */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
538 64, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
552 0, /* rightshift */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
554 0, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 0, /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
567 addend. */
568 HOWTO (R_PPC64_RELATIVE, /* type */
569 0, /* rightshift */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
571 64, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 32, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
599 0, /* rightshift */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
601 16, /* bitsize */
602 FALSE, /* pc_relative */
603 0, /* bitpos */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
608 0, /* src_mask */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
611
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
614 0, /* rightshift */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
616 32, /* bitsize */
617 TRUE, /* pc_relative */
618 0, /* bitpos */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
627
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
646 0, /* rightshift */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
648 32, /* bitsize */
649 TRUE, /* pc_relative */
650 0, /* bitpos */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
655 0, /* src_mask */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
658
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
660 the symbol. */
661 HOWTO (R_PPC64_PLT16_LO, /* type */
662 0, /* rightshift */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
664 16, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
674
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
676 the symbol. */
677 HOWTO (R_PPC64_PLT16_HI, /* type */
678 16, /* rightshift */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
680 16, /* bitsize */
681 FALSE, /* pc_relative */
682 0, /* bitpos */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
687 0, /* src_mask */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
690
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
692 the symbol. */
693 HOWTO (R_PPC64_PLT16_HA, /* type */
694 16, /* rightshift */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
696 16, /* bitsize */
697 FALSE, /* pc_relative */
698 0, /* bitpos */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
703 0, /* src_mask */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
706
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
724 0, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
769 2, /* rightshift */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
771 30, /* bitsize */
772 TRUE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
781
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
783
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
786 0, /* rightshift */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
788 64, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
801 32, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
817 32, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 16, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
832 48, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
848 48, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
863 0, /* rightshift */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
865 64, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 TRUE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
890
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
907 table. */
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 TRUE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
922
923 /* 16 bit TOC-relative relocation. */
924
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation without overflow. */
941
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation, high 16 bits. */
958
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
961 16, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
976 negative. */
977
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
980 16, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
994
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
997 0, /* rightshift */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
999 64, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1020 0, /* rightshift */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1022 16, /* bitsize */
1023 FALSE, /* pc_relative */
1024 0, /* bitpos */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1029 0, /* src_mask */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1032
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1036 0, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1067 is negative. */
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1072 16, /* bitsize */
1073 FALSE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1079 0, /* src_mask */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1082
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Marker relocs for TLS. */
1251 HOWTO (R_PPC64_TLS,
1252 0, /* rightshift */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 32, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 HOWTO (R_PPC64_TLSGD,
1266 0, /* rightshift */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1268 32, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 HOWTO (R_PPC64_TLSLD,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TOCSAVE,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1310 0, /* rightshift */
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1312 64, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1342 0, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1462 0, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1493 0, /* rightshift */
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1495 64, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1508 0, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1628 0, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1722 0, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1783 0, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1844 0, /* rightshift */
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1846 16, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1903 0, /* rightshift */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1905 0, /* bitsize */
1906 FALSE, /* pc_relative */
1907 0, /* bitpos */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1912 0, /* src_mask */
1913 0, /* dst_mask */
1914 FALSE), /* pcrel_offset */
1915
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1917 0, /* rightshift */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1919 64, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1932 0, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 TRUE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1980 16, /* bitsize */
1981 TRUE, /* pc_relative */
1982 0, /* bitpos */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1987 0, /* src_mask */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1990
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1993 0, /* rightshift */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1995 0, /* bitsize */
1996 FALSE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0, /* dst_mask */
2004 FALSE), /* pcrel_offset */
2005
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2008 0, /* rightshift */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2010 0, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020 };
2021
2022 \f
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2024 be done. */
2025
2026 static void
2027 ppc_howto_init (void)
2028 {
2029 unsigned int i, type;
2030
2031 for (i = 0;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2033 i++)
2034 {
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2039 }
2040 }
2041
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2045 {
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2047
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2050 ppc_howto_init ();
2051
2052 switch (code)
2053 {
2054 default:
2055 return NULL;
2056
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2058 break;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2060 break;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2062 break;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2064 break;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2066 break;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2070 break;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2072 break;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2074 break;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2076 break;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2078 break;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2080 break;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2082 break;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2084 break;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2086 break;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2088 break;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2092 break;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2094 break;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2096 break;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2098 break;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2100 break;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2102 break;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2104 break;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2106 break;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2108 break;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2110 break;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2112 break;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2114 break;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2116 break;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2118 break;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2120 break;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2122 break;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2124 break;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2126 break;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2128 break;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2130 break;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2132 break;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2134 break;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2136 break;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2138 break;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2140 break;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2142 break;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2144 break;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2152 break;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2154 break;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2156 break;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2158 break;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2160 break;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2162 break;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2164 break;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2166 break;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2168 break;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2170 break;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2172 break;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2174 break;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2176 break;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2178 break;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2180 break;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2182 break;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2184 break;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2186 break;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2188 break;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2190 break;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2192 break;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2194 break;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2196 break;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2198 break;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2200 break;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2204 break;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2206 break;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2210 break;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2212 break;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2214 break;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2216 break;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2218 break;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2220 break;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2222 break;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2224 break;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2226 break;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2228 break;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2230 break;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2232 break;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2234 break;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2236 break;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2238 break;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2240 break;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2242 break;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2244 break;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2246 break;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2248 break;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2250 break;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2252 break;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2254 break;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2256 break;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2258 break;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2260 break;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2262 break;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2266 break;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2268 break;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2270 break;
2271 }
2272
2273 return ppc64_elf_howto_table[r];
2274 };
2275
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2278 const char *r_name)
2279 {
2280 unsigned int i;
2281
2282 for (i = 0;
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2284 i++)
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2288
2289 return NULL;
2290 }
2291
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2293
2294 static void
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2297 {
2298 unsigned int type;
2299
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2302 ppc_howto_init ();
2303
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2307 {
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2309 abfd, (int) type);
2310 type = R_PPC64_NONE;
2311 }
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2313 }
2314
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2316
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2321 {
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2324 link time. */
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2328
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2331 doesn't matter. */
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2334 }
2335
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340 {
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2344
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2347 {
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2350 NULL, NULL, FALSE);
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2355 }
2356 return bfd_reloc_continue;
2357 }
2358
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2363 {
2364 long insn;
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2369
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2372 link time. */
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2376
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2384
2385 if (is_isa_v2)
2386 {
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2391 insn |= 0x02 << 21;
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2393 insn |= 0x08 << 21;
2394 else
2395 goto out;
2396 }
2397 else
2398 {
2399 bfd_vma target = 0;
2400 bfd_vma from;
2401
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2407
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2411
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2414 insn ^= 0x01 << 21;
2415 }
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2417 out:
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2420 }
2421
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2426 {
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2429 link time. */
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2433
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2437 }
2438
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2443 {
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2453
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2457 }
2458
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463 {
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2480 }
2481
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2486 {
2487 bfd_vma TOCstart;
2488
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2491 link time. */
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2495
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2497 if (TOCstart == 0)
2498 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2499
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2502
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 bfd_vma TOCstart;
2514 bfd_size_type octets;
2515
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2518 link time. */
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2522
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2524 if (TOCstart == 0)
2525 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2526
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2530 }
2531
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2536 {
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2539 link time. */
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2543
2544 if (error_message != NULL)
2545 {
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2550 }
2551 return bfd_reloc_dangerous;
2552 }
2553
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2556 struct got_entry
2557 {
2558 struct got_entry *next;
2559
2560 /* The symbol addend that we'll be placing in the GOT. */
2561 bfd_vma addend;
2562
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2568
2569 Point to the BFD owning this GOT entry. */
2570 bfd *owner;
2571
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2575
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2578
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2580 union
2581 {
2582 bfd_signed_vma refcount;
2583 bfd_vma offset;
2584 struct got_entry *ent;
2585 } got;
2586 };
2587
2588 /* The same for PLT. */
2589 struct plt_entry
2590 {
2591 struct plt_entry *next;
2592
2593 bfd_vma addend;
2594
2595 union
2596 {
2597 bfd_signed_vma refcount;
2598 bfd_vma offset;
2599 } plt;
2600 };
2601
2602 struct ppc64_elf_obj_tdata
2603 {
2604 struct elf_obj_tdata elf;
2605
2606 /* Shortcuts to dynamic linker sections. */
2607 asection *got;
2608 asection *relgot;
2609
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2613
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
2617
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2620
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2624
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2628 };
2629
2630 #define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2632
2633 #define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2635
2636 #define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2639
2640 /* Override the generic function because we store some extras. */
2641
2642 static bfd_boolean
2643 ppc64_elf_mkobject (bfd *abfd)
2644 {
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2646 PPC64_ELF_DATA);
2647 }
2648
2649 /* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2651
2652 static bfd_boolean
2653 ppc64_elf_object_p (bfd *abfd)
2654 {
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2656 {
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2658
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2660 {
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2664 }
2665 }
2666 return TRUE;
2667 }
2668
2669 /* Support for core dump NOTE sections. */
2670
2671 static bfd_boolean
2672 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2673 {
2674 size_t offset, size;
2675
2676 if (note->descsz != 504)
2677 return FALSE;
2678
2679 /* pr_cursig */
2680 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2681
2682 /* pr_pid */
2683 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2684
2685 /* pr_reg */
2686 offset = 112;
2687 size = 384;
2688
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2692 }
2693
2694 static bfd_boolean
2695 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2696 {
2697 if (note->descsz != 136)
2698 return FALSE;
2699
2700 elf_tdata (abfd)->core_pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core_program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core_command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2706
2707 return TRUE;
2708 }
2709
2710 static char *
2711 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2712 ...)
2713 {
2714 switch (note_type)
2715 {
2716 default:
2717 return NULL;
2718
2719 case NT_PRPSINFO:
2720 {
2721 char data[136];
2722 va_list ap;
2723
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2728 va_end (ap);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2731 }
2732
2733 case NT_PRSTATUS:
2734 {
2735 char data[504];
2736 va_list ap;
2737 long pid;
2738 int cursig;
2739 const void *greg;
2740
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2750 va_end (ap);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2753 }
2754 }
2755 }
2756
2757 /* Add extra PPC sections. */
2758
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760 {
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768 };
2769
2770 enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774 };
2775
2776 struct _ppc64_elf_section_data
2777 {
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808 };
2809
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813 static bfd_boolean
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815 {
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828 }
2829
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2832 {
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838 }
2839 \f
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2842
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845 static int
2846 compare_symbols (const void *ap, const void *bp)
2847 {
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920 }
2921
2922 /* Search SYMS for a symbol of the given VALUE. */
2923
2924 static asymbol *
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926 {
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960 }
2961
2962 static bfd_boolean
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964 {
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969 }
2970
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974 static long
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979 {
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3321 info file. */
3322 if ((sec->flags & SEC_ALLOC) == 0)
3323 break;
3324 if ((sec->flags & SEC_CODE) != 0)
3325 s->section = sec;
3326 }
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3329 s->name = names;
3330 *names++ = '.';
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3333 names += len + 1;
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3337 s++;
3338 }
3339 }
3340 free (contents);
3341
3342 if (glink != NULL && relplt != NULL)
3343 {
3344 if (resolv_vma)
3345 {
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3348 s->the_bfd = abfd;
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3350 s->section = glink;
3351 s->value = resolv_vma - glink->vma;
3352 s->name = names;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3355 s++;
3356 count++;
3357 }
3358
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3366
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3377 {
3378 size_t len;
3379
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3386 s->section = glink;
3387 s->value = glink_vma - glink->vma;
3388 s->name = names;
3389 s->udata.p = NULL;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3392 names += len;
3393 if (p->addend != 0)
3394 {
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3399 }
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3402 s++;
3403 glink_vma += 8;
3404 if (i >= 0x8000)
3405 glink_vma += 4;
3406 }
3407 count += plt_count;
3408 }
3409 }
3410
3411 done:
3412 free (syms);
3413 return count;
3414 }
3415 \f
3416 /* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3422 called.
3423
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3427
3428 . .text
3429 . x:
3430 . bl .foo
3431 . nop
3432
3433 The function definition in another object file might be:
3434
3435 . .section .opd
3436 . foo: .quad .foo
3437 . .quad .TOC.@tocbase
3438 . .quad 0
3439 .
3440 . .text
3441 . .foo: blr
3442
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3448
3449 . x:
3450 . bl .foo_stub
3451 . ld 2,40(1)
3452 .
3453 .
3454 . .foo_stub:
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3458 . ld 11,0(12)
3459 . ld 2,8(12)
3460 . mtctr 11
3461 . ld 11,16(12)
3462 . bctr
3463 .
3464 . .section .plt
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3466
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3469 copying.
3470
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3483
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3487
3488 /* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3491
3492 static int
3493 must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3495 {
3496 switch (r_type)
3497 {
3498 default:
3499 return 1;
3500
3501 case R_PPC64_REL32:
3502 case R_PPC64_REL64:
3503 case R_PPC64_REL30:
3504 return 0;
3505
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3518 }
3519 }
3520
3521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536 #define ELIMINATE_COPY_RELOCS 1
3537
3538 /* Section name for stubs is the associated section name plus this
3539 string. */
3540 #define STUB_SUFFIX ".stub"
3541
3542 /* Linker stubs.
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3546 . b dest
3547
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3553 . mtctr %r11
3554 . bctr
3555
3556 ppc_stub_plt_call:
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3561 . std %r2,40(%r1)
3562 . ld %r11,xxx+0@toc@l(%r12)
3563 . mtctr %r11
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3566 . bctr
3567
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3571 . std %r2,40(%r1)
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3574 . b dest
3575
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3577 . std %r2,40(%r1)
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3582 . mtctr %r11
3583 . bctr
3584
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3587 */
3588
3589 enum ppc_stub_type {
3590 ppc_stub_none,
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3595 ppc_stub_plt_call,
3596 ppc_stub_plt_call_r2save
3597 };
3598
3599 struct ppc_stub_hash_entry {
3600
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3603
3604 enum ppc_stub_type stub_type;
3605
3606 /* The stub section. */
3607 asection *stub_sec;
3608
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3611
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3616
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3620
3621 /* And the reloc addend that this was derived from. */
3622 bfd_vma addend;
3623
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3626 asection *id_sec;
3627 };
3628
3629 struct ppc_branch_hash_entry {
3630
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3633
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3636
3637 /* Generation marker. */
3638 unsigned int iter;
3639 };
3640
3641 struct ppc_link_hash_entry
3642 {
3643 struct elf_link_hash_entry elf;
3644
3645 union {
3646 /* A pointer to the most recently used stub hash entry against this
3647 symbol. */
3648 struct ppc_stub_hash_entry *stub_cache;
3649
3650 /* A pointer to the next symbol starting with a '.' */
3651 struct ppc_link_hash_entry *next_dot_sym;
3652 } u;
3653
3654 /* Track dynamic relocs copied for this symbol. */
3655 struct elf_dyn_relocs *dyn_relocs;
3656
3657 /* Link between function code and descriptor symbols. */
3658 struct ppc_link_hash_entry *oh;
3659
3660 /* Flag function code and descriptor symbols. */
3661 unsigned int is_func:1;
3662 unsigned int is_func_descriptor:1;
3663 unsigned int fake:1;
3664
3665 /* Whether global opd/toc sym has been adjusted or not.
3666 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3667 should be set for all globals defined in any opd/toc section. */
3668 unsigned int adjust_done:1;
3669
3670 /* Set if we twiddled this symbol to weak at some stage. */
3671 unsigned int was_undefined:1;
3672
3673 /* Contexts in which symbol is used in the GOT (or TOC).
3674 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3675 corresponding relocs are encountered during check_relocs.
3676 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3677 indicate the corresponding GOT entry type is not needed.
3678 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3679 a TPREL one. We use a separate flag rather than setting TPREL
3680 just for convenience in distinguishing the two cases. */
3681 #define TLS_GD 1 /* GD reloc. */
3682 #define TLS_LD 2 /* LD reloc. */
3683 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3684 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3685 #define TLS_TLS 16 /* Any TLS reloc. */
3686 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3687 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3688 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3689 unsigned char tls_mask;
3690 };
3691
3692 /* ppc64 ELF linker hash table. */
3693
3694 struct ppc_link_hash_table
3695 {
3696 struct elf_link_hash_table elf;
3697
3698 /* The stub hash table. */
3699 struct bfd_hash_table stub_hash_table;
3700
3701 /* Another hash table for plt_branch stubs. */
3702 struct bfd_hash_table branch_hash_table;
3703
3704 /* Hash table for function prologue tocsave. */
3705 htab_t tocsave_htab;
3706
3707 /* Linker stub bfd. */
3708 bfd *stub_bfd;
3709
3710 /* Linker call-backs. */
3711 asection * (*add_stub_section) (const char *, asection *);
3712 void (*layout_sections_again) (void);
3713
3714 /* Array to keep track of which stub sections have been created, and
3715 information on stub grouping. */
3716 struct map_stub {
3717 /* This is the section to which stubs in the group will be attached. */
3718 asection *link_sec;
3719 /* The stub section. */
3720 asection *stub_sec;
3721 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3722 bfd_vma toc_off;
3723 } *stub_group;
3724
3725 /* Temp used when calculating TOC pointers. */
3726 bfd_vma toc_curr;
3727 bfd *toc_bfd;
3728 asection *toc_first_sec;
3729
3730 /* Highest input section id. */
3731 int top_id;
3732
3733 /* Highest output section index. */
3734 int top_index;
3735
3736 /* Used when adding symbols. */
3737 struct ppc_link_hash_entry *dot_syms;
3738
3739 /* List of input sections for each output section. */
3740 asection **input_list;
3741
3742 /* Short-cuts to get to dynamic linker sections. */
3743 asection *got;
3744 asection *plt;
3745 asection *relplt;
3746 asection *iplt;
3747 asection *reliplt;
3748 asection *dynbss;
3749 asection *relbss;
3750 asection *glink;
3751 asection *sfpr;
3752 asection *brlt;
3753 asection *relbrlt;
3754 asection *glink_eh_frame;
3755
3756 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3757 struct ppc_link_hash_entry *tls_get_addr;
3758 struct ppc_link_hash_entry *tls_get_addr_fd;
3759
3760 /* The size of reliplt used by got entry relocs. */
3761 bfd_size_type got_reli_size;
3762
3763 /* Statistics. */
3764 unsigned long stub_count[ppc_stub_plt_call_r2save];
3765
3766 /* Number of stubs against global syms. */
3767 unsigned long stub_globals;
3768
3769 /* Alignment of PLT call stubs. */
3770 unsigned int plt_stub_align:4;
3771
3772 /* Set if PLT call stubs should load r11. */
3773 unsigned int plt_static_chain:1;
3774
3775 /* Set if PLT call stubs need a read-read barrier. */
3776 unsigned int plt_thread_safe:1;
3777
3778 /* Set if we should emit symbols for stubs. */
3779 unsigned int emit_stub_syms:1;
3780
3781 /* Set if __tls_get_addr optimization should not be done. */
3782 unsigned int no_tls_get_addr_opt:1;
3783
3784 /* Support for multiple toc sections. */
3785 unsigned int do_multi_toc:1;
3786 unsigned int multi_toc_needed:1;
3787 unsigned int second_toc_pass:1;
3788 unsigned int do_toc_opt:1;
3789
3790 /* Set on error. */
3791 unsigned int stub_error:1;
3792
3793 /* Temp used by ppc64_elf_process_dot_syms. */
3794 unsigned int twiddled_syms:1;
3795
3796 /* Incremented every time we size stubs. */
3797 unsigned int stub_iteration;
3798
3799 /* Small local sym cache. */
3800 struct sym_cache sym_cache;
3801 };
3802
3803 /* Rename some of the generic section flags to better document how they
3804 are used here. */
3805
3806 /* Nonzero if this section has TLS related relocations. */
3807 #define has_tls_reloc sec_flg0
3808
3809 /* Nonzero if this section has a call to __tls_get_addr. */
3810 #define has_tls_get_addr_call sec_flg1
3811
3812 /* Nonzero if this section has any toc or got relocs. */
3813 #define has_toc_reloc sec_flg2
3814
3815 /* Nonzero if this section has a call to another section that uses
3816 the toc or got. */
3817 #define makes_toc_func_call sec_flg3
3818
3819 /* Recursion protection when determining above flag. */
3820 #define call_check_in_progress sec_flg4
3821 #define call_check_done sec_flg5
3822
3823 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3824
3825 #define ppc_hash_table(p) \
3826 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3827 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3828
3829 #define ppc_stub_hash_lookup(table, string, create, copy) \
3830 ((struct ppc_stub_hash_entry *) \
3831 bfd_hash_lookup ((table), (string), (create), (copy)))
3832
3833 #define ppc_branch_hash_lookup(table, string, create, copy) \
3834 ((struct ppc_branch_hash_entry *) \
3835 bfd_hash_lookup ((table), (string), (create), (copy)))
3836
3837 /* Create an entry in the stub hash table. */
3838
3839 static struct bfd_hash_entry *
3840 stub_hash_newfunc (struct bfd_hash_entry *entry,
3841 struct bfd_hash_table *table,
3842 const char *string)
3843 {
3844 /* Allocate the structure if it has not already been allocated by a
3845 subclass. */
3846 if (entry == NULL)
3847 {
3848 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3849 if (entry == NULL)
3850 return entry;
3851 }
3852
3853 /* Call the allocation method of the superclass. */
3854 entry = bfd_hash_newfunc (entry, table, string);
3855 if (entry != NULL)
3856 {
3857 struct ppc_stub_hash_entry *eh;
3858
3859 /* Initialize the local fields. */
3860 eh = (struct ppc_stub_hash_entry *) entry;
3861 eh->stub_type = ppc_stub_none;
3862 eh->stub_sec = NULL;
3863 eh->stub_offset = 0;
3864 eh->target_value = 0;
3865 eh->target_section = NULL;
3866 eh->h = NULL;
3867 eh->id_sec = NULL;
3868 }
3869
3870 return entry;
3871 }
3872
3873 /* Create an entry in the branch hash table. */
3874
3875 static struct bfd_hash_entry *
3876 branch_hash_newfunc (struct bfd_hash_entry *entry,
3877 struct bfd_hash_table *table,
3878 const char *string)
3879 {
3880 /* Allocate the structure if it has not already been allocated by a
3881 subclass. */
3882 if (entry == NULL)
3883 {
3884 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3885 if (entry == NULL)
3886 return entry;
3887 }
3888
3889 /* Call the allocation method of the superclass. */
3890 entry = bfd_hash_newfunc (entry, table, string);
3891 if (entry != NULL)
3892 {
3893 struct ppc_branch_hash_entry *eh;
3894
3895 /* Initialize the local fields. */
3896 eh = (struct ppc_branch_hash_entry *) entry;
3897 eh->offset = 0;
3898 eh->iter = 0;
3899 }
3900
3901 return entry;
3902 }
3903
3904 /* Create an entry in a ppc64 ELF linker hash table. */
3905
3906 static struct bfd_hash_entry *
3907 link_hash_newfunc (struct bfd_hash_entry *entry,
3908 struct bfd_hash_table *table,
3909 const char *string)
3910 {
3911 /* Allocate the structure if it has not already been allocated by a
3912 subclass. */
3913 if (entry == NULL)
3914 {
3915 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3916 if (entry == NULL)
3917 return entry;
3918 }
3919
3920 /* Call the allocation method of the superclass. */
3921 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3922 if (entry != NULL)
3923 {
3924 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3925
3926 memset (&eh->u.stub_cache, 0,
3927 (sizeof (struct ppc_link_hash_entry)
3928 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3929
3930 /* When making function calls, old ABI code references function entry
3931 points (dot symbols), while new ABI code references the function
3932 descriptor symbol. We need to make any combination of reference and
3933 definition work together, without breaking archive linking.
3934
3935 For a defined function "foo" and an undefined call to "bar":
3936 An old object defines "foo" and ".foo", references ".bar" (possibly
3937 "bar" too).
3938 A new object defines "foo" and references "bar".
3939
3940 A new object thus has no problem with its undefined symbols being
3941 satisfied by definitions in an old object. On the other hand, the
3942 old object won't have ".bar" satisfied by a new object.
3943
3944 Keep a list of newly added dot-symbols. */
3945
3946 if (string[0] == '.')
3947 {
3948 struct ppc_link_hash_table *htab;
3949
3950 htab = (struct ppc_link_hash_table *) table;
3951 eh->u.next_dot_sym = htab->dot_syms;
3952 htab->dot_syms = eh;
3953 }
3954 }
3955
3956 return entry;
3957 }
3958
3959 struct tocsave_entry {
3960 asection *sec;
3961 bfd_vma offset;
3962 };
3963
3964 static hashval_t
3965 tocsave_htab_hash (const void *p)
3966 {
3967 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3968 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3969 }
3970
3971 static int
3972 tocsave_htab_eq (const void *p1, const void *p2)
3973 {
3974 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3975 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3976 return e1->sec == e2->sec && e1->offset == e2->offset;
3977 }
3978
3979 /* Create a ppc64 ELF linker hash table. */
3980
3981 static struct bfd_link_hash_table *
3982 ppc64_elf_link_hash_table_create (bfd *abfd)
3983 {
3984 struct ppc_link_hash_table *htab;
3985 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3986
3987 htab = bfd_zmalloc (amt);
3988 if (htab == NULL)
3989 return NULL;
3990
3991 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3992 sizeof (struct ppc_link_hash_entry),
3993 PPC64_ELF_DATA))
3994 {
3995 free (htab);
3996 return NULL;
3997 }
3998
3999 /* Init the stub hash table too. */
4000 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4001 sizeof (struct ppc_stub_hash_entry)))
4002 return NULL;
4003
4004 /* And the branch hash table. */
4005 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4006 sizeof (struct ppc_branch_hash_entry)))
4007 return NULL;
4008
4009 htab->tocsave_htab = htab_try_create (1024,
4010 tocsave_htab_hash,
4011 tocsave_htab_eq,
4012 NULL);
4013 if (htab->tocsave_htab == NULL)
4014 return NULL;
4015
4016 /* Initializing two fields of the union is just cosmetic. We really
4017 only care about glist, but when compiled on a 32-bit host the
4018 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4019 debugger inspection of these fields look nicer. */
4020 htab->elf.init_got_refcount.refcount = 0;
4021 htab->elf.init_got_refcount.glist = NULL;
4022 htab->elf.init_plt_refcount.refcount = 0;
4023 htab->elf.init_plt_refcount.glist = NULL;
4024 htab->elf.init_got_offset.offset = 0;
4025 htab->elf.init_got_offset.glist = NULL;
4026 htab->elf.init_plt_offset.offset = 0;
4027 htab->elf.init_plt_offset.glist = NULL;
4028
4029 return &htab->elf.root;
4030 }
4031
4032 /* Free the derived linker hash table. */
4033
4034 static void
4035 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4036 {
4037 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4038
4039 bfd_hash_table_free (&htab->stub_hash_table);
4040 bfd_hash_table_free (&htab->branch_hash_table);
4041 if (htab->tocsave_htab)
4042 htab_delete (htab->tocsave_htab);
4043 _bfd_generic_link_hash_table_free (hash);
4044 }
4045
4046 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4047
4048 void
4049 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4050 {
4051 struct ppc_link_hash_table *htab;
4052
4053 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4054
4055 /* Always hook our dynamic sections into the first bfd, which is the
4056 linker created stub bfd. This ensures that the GOT header is at
4057 the start of the output TOC section. */
4058 htab = ppc_hash_table (info);
4059 if (htab == NULL)
4060 return;
4061 htab->stub_bfd = abfd;
4062 htab->elf.dynobj = abfd;
4063 }
4064
4065 /* Build a name for an entry in the stub hash table. */
4066
4067 static char *
4068 ppc_stub_name (const asection *input_section,
4069 const asection *sym_sec,
4070 const struct ppc_link_hash_entry *h,
4071 const Elf_Internal_Rela *rel)
4072 {
4073 char *stub_name;
4074 bfd_size_type len;
4075
4076 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4077 offsets from a sym as a branch target? In fact, we could
4078 probably assume the addend is always zero. */
4079 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4080
4081 if (h)
4082 {
4083 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4084 stub_name = bfd_malloc (len);
4085 if (stub_name == NULL)
4086 return stub_name;
4087
4088 sprintf (stub_name, "%08x.%s+%x",
4089 input_section->id & 0xffffffff,
4090 h->elf.root.root.string,
4091 (int) rel->r_addend & 0xffffffff);
4092 }
4093 else
4094 {
4095 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4096 stub_name = bfd_malloc (len);
4097 if (stub_name == NULL)
4098 return stub_name;
4099
4100 sprintf (stub_name, "%08x.%x:%x+%x",
4101 input_section->id & 0xffffffff,
4102 sym_sec->id & 0xffffffff,
4103 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4104 (int) rel->r_addend & 0xffffffff);
4105 }
4106 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4107 stub_name[len - 2] = 0;
4108 return stub_name;
4109 }
4110
4111 /* Look up an entry in the stub hash. Stub entries are cached because
4112 creating the stub name takes a bit of time. */
4113
4114 static struct ppc_stub_hash_entry *
4115 ppc_get_stub_entry (const asection *input_section,
4116 const asection *sym_sec,
4117 struct ppc_link_hash_entry *h,
4118 const Elf_Internal_Rela *rel,
4119 struct ppc_link_hash_table *htab)
4120 {
4121 struct ppc_stub_hash_entry *stub_entry;
4122 const asection *id_sec;
4123
4124 /* If this input section is part of a group of sections sharing one
4125 stub section, then use the id of the first section in the group.
4126 Stub names need to include a section id, as there may well be
4127 more than one stub used to reach say, printf, and we need to
4128 distinguish between them. */
4129 id_sec = htab->stub_group[input_section->id].link_sec;
4130
4131 if (h != NULL && h->u.stub_cache != NULL
4132 && h->u.stub_cache->h == h
4133 && h->u.stub_cache->id_sec == id_sec)
4134 {
4135 stub_entry = h->u.stub_cache;
4136 }
4137 else
4138 {
4139 char *stub_name;
4140
4141 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4142 if (stub_name == NULL)
4143 return NULL;
4144
4145 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4146 stub_name, FALSE, FALSE);
4147 if (h != NULL)
4148 h->u.stub_cache = stub_entry;
4149
4150 free (stub_name);
4151 }
4152
4153 return stub_entry;
4154 }
4155
4156 /* Add a new stub entry to the stub hash. Not all fields of the new
4157 stub entry are initialised. */
4158
4159 static struct ppc_stub_hash_entry *
4160 ppc_add_stub (const char *stub_name,
4161 asection *section,
4162 struct bfd_link_info *info)
4163 {
4164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4165 asection *link_sec;
4166 asection *stub_sec;
4167 struct ppc_stub_hash_entry *stub_entry;
4168
4169 link_sec = htab->stub_group[section->id].link_sec;
4170 stub_sec = htab->stub_group[section->id].stub_sec;
4171 if (stub_sec == NULL)
4172 {
4173 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4174 if (stub_sec == NULL)
4175 {
4176 size_t namelen;
4177 bfd_size_type len;
4178 char *s_name;
4179
4180 namelen = strlen (link_sec->name);
4181 len = namelen + sizeof (STUB_SUFFIX);
4182 s_name = bfd_alloc (htab->stub_bfd, len);
4183 if (s_name == NULL)
4184 return NULL;
4185
4186 memcpy (s_name, link_sec->name, namelen);
4187 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4188 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4189 if (stub_sec == NULL)
4190 return NULL;
4191 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4192 }
4193 htab->stub_group[section->id].stub_sec = stub_sec;
4194 }
4195
4196 /* Enter this entry into the linker stub hash table. */
4197 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4198 TRUE, FALSE);
4199 if (stub_entry == NULL)
4200 {
4201 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4202 section->owner, stub_name);
4203 return NULL;
4204 }
4205
4206 stub_entry->stub_sec = stub_sec;
4207 stub_entry->stub_offset = 0;
4208 stub_entry->id_sec = link_sec;
4209 return stub_entry;
4210 }
4211
4212 /* Create sections for linker generated code. */
4213
4214 static bfd_boolean
4215 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4216 {
4217 struct ppc_link_hash_table *htab;
4218 flagword flags;
4219
4220 htab = ppc_hash_table (info);
4221 if (htab == NULL)
4222 return FALSE;
4223
4224 /* Create .sfpr for code to save and restore fp regs. */
4225 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4226 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4227 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4228 flags);
4229 if (htab->sfpr == NULL
4230 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4231 return FALSE;
4232
4233 /* Create .glink for lazy dynamic linking support. */
4234 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4235 flags);
4236 if (htab->glink == NULL
4237 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4238 return FALSE;
4239
4240 if (!info->no_ld_generated_unwind_info)
4241 {
4242 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4243 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4244 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4245 ".eh_frame",
4246 flags);
4247 if (htab->glink_eh_frame == NULL
4248 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4249 return FALSE;
4250 }
4251
4252 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4253 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4254 if (htab->iplt == NULL
4255 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4256 return FALSE;
4257
4258 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4259 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4260 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4261 ".rela.iplt",
4262 flags);
4263 if (htab->reliplt == NULL
4264 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4265 return FALSE;
4266
4267 /* Create branch lookup table for plt_branch stubs. */
4268 flags = (SEC_ALLOC | SEC_LOAD
4269 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4270 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4271 flags);
4272 if (htab->brlt == NULL
4273 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4274 return FALSE;
4275
4276 if (!info->shared)
4277 return TRUE;
4278
4279 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4280 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4281 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4282 ".rela.branch_lt",
4283 flags);
4284 if (htab->relbrlt == NULL
4285 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4286 return FALSE;
4287
4288 return TRUE;
4289 }
4290
4291 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4292 not already done. */
4293
4294 static bfd_boolean
4295 create_got_section (bfd *abfd, struct bfd_link_info *info)
4296 {
4297 asection *got, *relgot;
4298 flagword flags;
4299 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4300
4301 if (!is_ppc64_elf (abfd))
4302 return FALSE;
4303 if (htab == NULL)
4304 return FALSE;
4305
4306 if (!htab->got)
4307 {
4308 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4309 return FALSE;
4310
4311 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4312 if (!htab->got)
4313 abort ();
4314 }
4315
4316 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4317 | SEC_LINKER_CREATED);
4318
4319 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4320 if (!got
4321 || !bfd_set_section_alignment (abfd, got, 3))
4322 return FALSE;
4323
4324 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4325 flags | SEC_READONLY);
4326 if (!relgot
4327 || ! bfd_set_section_alignment (abfd, relgot, 3))
4328 return FALSE;
4329
4330 ppc64_elf_tdata (abfd)->got = got;
4331 ppc64_elf_tdata (abfd)->relgot = relgot;
4332 return TRUE;
4333 }
4334
4335 /* Create the dynamic sections, and set up shortcuts. */
4336
4337 static bfd_boolean
4338 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4339 {
4340 struct ppc_link_hash_table *htab;
4341
4342 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4343 return FALSE;
4344
4345 htab = ppc_hash_table (info);
4346 if (htab == NULL)
4347 return FALSE;
4348
4349 if (!htab->got)
4350 htab->got = bfd_get_linker_section (dynobj, ".got");
4351 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4352 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4353 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4354 if (!info->shared)
4355 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4356
4357 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4358 || (!info->shared && !htab->relbss))
4359 abort ();
4360
4361 return TRUE;
4362 }
4363
4364 /* Follow indirect and warning symbol links. */
4365
4366 static inline struct bfd_link_hash_entry *
4367 follow_link (struct bfd_link_hash_entry *h)
4368 {
4369 while (h->type == bfd_link_hash_indirect
4370 || h->type == bfd_link_hash_warning)
4371 h = h->u.i.link;
4372 return h;
4373 }
4374
4375 static inline struct elf_link_hash_entry *
4376 elf_follow_link (struct elf_link_hash_entry *h)
4377 {
4378 return (struct elf_link_hash_entry *) follow_link (&h->root);
4379 }
4380
4381 static inline struct ppc_link_hash_entry *
4382 ppc_follow_link (struct ppc_link_hash_entry *h)
4383 {
4384 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4385 }
4386
4387 /* Merge PLT info on FROM with that on TO. */
4388
4389 static void
4390 move_plt_plist (struct ppc_link_hash_entry *from,
4391 struct ppc_link_hash_entry *to)
4392 {
4393 if (from->elf.plt.plist != NULL)
4394 {
4395 if (to->elf.plt.plist != NULL)
4396 {
4397 struct plt_entry **entp;
4398 struct plt_entry *ent;
4399
4400 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4401 {
4402 struct plt_entry *dent;
4403
4404 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4405 if (dent->addend == ent->addend)
4406 {
4407 dent->plt.refcount += ent->plt.refcount;
4408 *entp = ent->next;
4409 break;
4410 }
4411 if (dent == NULL)
4412 entp = &ent->next;
4413 }
4414 *entp = to->elf.plt.plist;
4415 }
4416
4417 to->elf.plt.plist = from->elf.plt.plist;
4418 from->elf.plt.plist = NULL;
4419 }
4420 }
4421
4422 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4423
4424 static void
4425 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4426 struct elf_link_hash_entry *dir,
4427 struct elf_link_hash_entry *ind)
4428 {
4429 struct ppc_link_hash_entry *edir, *eind;
4430
4431 edir = (struct ppc_link_hash_entry *) dir;
4432 eind = (struct ppc_link_hash_entry *) ind;
4433
4434 edir->is_func |= eind->is_func;
4435 edir->is_func_descriptor |= eind->is_func_descriptor;
4436 edir->tls_mask |= eind->tls_mask;
4437 if (eind->oh != NULL)
4438 edir->oh = ppc_follow_link (eind->oh);
4439
4440 /* If called to transfer flags for a weakdef during processing
4441 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4442 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4443 if (!(ELIMINATE_COPY_RELOCS
4444 && eind->elf.root.type != bfd_link_hash_indirect
4445 && edir->elf.dynamic_adjusted))
4446 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4447
4448 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4449 edir->elf.ref_regular |= eind->elf.ref_regular;
4450 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4451 edir->elf.needs_plt |= eind->elf.needs_plt;
4452
4453 /* Copy over any dynamic relocs we may have on the indirect sym. */
4454 if (eind->dyn_relocs != NULL)
4455 {
4456 if (edir->dyn_relocs != NULL)
4457 {
4458 struct elf_dyn_relocs **pp;
4459 struct elf_dyn_relocs *p;
4460
4461 /* Add reloc counts against the indirect sym to the direct sym
4462 list. Merge any entries against the same section. */
4463 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4464 {
4465 struct elf_dyn_relocs *q;
4466
4467 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4468 if (q->sec == p->sec)
4469 {
4470 q->pc_count += p->pc_count;
4471 q->count += p->count;
4472 *pp = p->next;
4473 break;
4474 }
4475 if (q == NULL)
4476 pp = &p->next;
4477 }
4478 *pp = edir->dyn_relocs;
4479 }
4480
4481 edir->dyn_relocs = eind->dyn_relocs;
4482 eind->dyn_relocs = NULL;
4483 }
4484
4485 /* If we were called to copy over info for a weak sym, that's all.
4486 You might think dyn_relocs need not be copied over; After all,
4487 both syms will be dynamic or both non-dynamic so we're just
4488 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4489 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4490 dyn_relocs in read-only sections, and it does so on what is the
4491 DIR sym here. */
4492 if (eind->elf.root.type != bfd_link_hash_indirect)
4493 return;
4494
4495 /* Copy over got entries that we may have already seen to the
4496 symbol which just became indirect. */
4497 if (eind->elf.got.glist != NULL)
4498 {
4499 if (edir->elf.got.glist != NULL)
4500 {
4501 struct got_entry **entp;
4502 struct got_entry *ent;
4503
4504 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4505 {
4506 struct got_entry *dent;
4507
4508 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4509 if (dent->addend == ent->addend
4510 && dent->owner == ent->owner
4511 && dent->tls_type == ent->tls_type)
4512 {
4513 dent->got.refcount += ent->got.refcount;
4514 *entp = ent->next;
4515 break;
4516 }
4517 if (dent == NULL)
4518 entp = &ent->next;
4519 }
4520 *entp = edir->elf.got.glist;
4521 }
4522
4523 edir->elf.got.glist = eind->elf.got.glist;
4524 eind->elf.got.glist = NULL;
4525 }
4526
4527 /* And plt entries. */
4528 move_plt_plist (eind, edir);
4529
4530 if (eind->elf.dynindx != -1)
4531 {
4532 if (edir->elf.dynindx != -1)
4533 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4534 edir->elf.dynstr_index);
4535 edir->elf.dynindx = eind->elf.dynindx;
4536 edir->elf.dynstr_index = eind->elf.dynstr_index;
4537 eind->elf.dynindx = -1;
4538 eind->elf.dynstr_index = 0;
4539 }
4540 }
4541
4542 /* Find the function descriptor hash entry from the given function code
4543 hash entry FH. Link the entries via their OH fields. */
4544
4545 static struct ppc_link_hash_entry *
4546 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4547 {
4548 struct ppc_link_hash_entry *fdh = fh->oh;
4549
4550 if (fdh == NULL)
4551 {
4552 const char *fd_name = fh->elf.root.root.string + 1;
4553
4554 fdh = (struct ppc_link_hash_entry *)
4555 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4556 if (fdh == NULL)
4557 return fdh;
4558
4559 fdh->is_func_descriptor = 1;
4560 fdh->oh = fh;
4561 fh->is_func = 1;
4562 fh->oh = fdh;
4563 }
4564
4565 return ppc_follow_link (fdh);
4566 }
4567
4568 /* Make a fake function descriptor sym for the code sym FH. */
4569
4570 static struct ppc_link_hash_entry *
4571 make_fdh (struct bfd_link_info *info,
4572 struct ppc_link_hash_entry *fh)
4573 {
4574 bfd *abfd;
4575 asymbol *newsym;
4576 struct bfd_link_hash_entry *bh;
4577 struct ppc_link_hash_entry *fdh;
4578
4579 abfd = fh->elf.root.u.undef.abfd;
4580 newsym = bfd_make_empty_symbol (abfd);
4581 newsym->name = fh->elf.root.root.string + 1;
4582 newsym->section = bfd_und_section_ptr;
4583 newsym->value = 0;
4584 newsym->flags = BSF_WEAK;
4585
4586 bh = NULL;
4587 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4588 newsym->flags, newsym->section,
4589 newsym->value, NULL, FALSE, FALSE,
4590 &bh))
4591 return NULL;
4592
4593 fdh = (struct ppc_link_hash_entry *) bh;
4594 fdh->elf.non_elf = 0;
4595 fdh->fake = 1;
4596 fdh->is_func_descriptor = 1;
4597 fdh->oh = fh;
4598 fh->is_func = 1;
4599 fh->oh = fdh;
4600 return fdh;
4601 }
4602
4603 /* Fix function descriptor symbols defined in .opd sections to be
4604 function type. */
4605
4606 static bfd_boolean
4607 ppc64_elf_add_symbol_hook (bfd *ibfd,
4608 struct bfd_link_info *info,
4609 Elf_Internal_Sym *isym,
4610 const char **name ATTRIBUTE_UNUSED,
4611 flagword *flags ATTRIBUTE_UNUSED,
4612 asection **sec,
4613 bfd_vma *value ATTRIBUTE_UNUSED)
4614 {
4615 if ((ibfd->flags & DYNAMIC) == 0
4616 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4617 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4618
4619 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4620 {
4621 if ((ibfd->flags & DYNAMIC) == 0)
4622 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4623 }
4624 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4625 ;
4626 else if (*sec != NULL
4627 && strcmp ((*sec)->name, ".opd") == 0)
4628 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4629
4630 return TRUE;
4631 }
4632
4633 /* This function makes an old ABI object reference to ".bar" cause the
4634 inclusion of a new ABI object archive that defines "bar".
4635 NAME is a symbol defined in an archive. Return a symbol in the hash
4636 table that might be satisfied by the archive symbols. */
4637
4638 static struct elf_link_hash_entry *
4639 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4640 struct bfd_link_info *info,
4641 const char *name)
4642 {
4643 struct elf_link_hash_entry *h;
4644 char *dot_name;
4645 size_t len;
4646
4647 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4648 if (h != NULL
4649 /* Don't return this sym if it is a fake function descriptor
4650 created by add_symbol_adjust. */
4651 && !(h->root.type == bfd_link_hash_undefweak
4652 && ((struct ppc_link_hash_entry *) h)->fake))
4653 return h;
4654
4655 if (name[0] == '.')
4656 return h;
4657
4658 len = strlen (name);
4659 dot_name = bfd_alloc (abfd, len + 2);
4660 if (dot_name == NULL)
4661 return (struct elf_link_hash_entry *) 0 - 1;
4662 dot_name[0] = '.';
4663 memcpy (dot_name + 1, name, len + 1);
4664 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4665 bfd_release (abfd, dot_name);
4666 return h;
4667 }
4668
4669 /* This function satisfies all old ABI object references to ".bar" if a
4670 new ABI object defines "bar". Well, at least, undefined dot symbols
4671 are made weak. This stops later archive searches from including an
4672 object if we already have a function descriptor definition. It also
4673 prevents the linker complaining about undefined symbols.
4674 We also check and correct mismatched symbol visibility here. The
4675 most restrictive visibility of the function descriptor and the
4676 function entry symbol is used. */
4677
4678 static bfd_boolean
4679 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4680 {
4681 struct ppc_link_hash_table *htab;
4682 struct ppc_link_hash_entry *fdh;
4683
4684 if (eh->elf.root.type == bfd_link_hash_indirect)
4685 return TRUE;
4686
4687 if (eh->elf.root.type == bfd_link_hash_warning)
4688 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4689
4690 if (eh->elf.root.root.string[0] != '.')
4691 abort ();
4692
4693 htab = ppc_hash_table (info);
4694 if (htab == NULL)
4695 return FALSE;
4696
4697 fdh = lookup_fdh (eh, htab);
4698 if (fdh == NULL)
4699 {
4700 if (!info->relocatable
4701 && (eh->elf.root.type == bfd_link_hash_undefined
4702 || eh->elf.root.type == bfd_link_hash_undefweak)
4703 && eh->elf.ref_regular)
4704 {
4705 /* Make an undefweak function descriptor sym, which is enough to
4706 pull in an --as-needed shared lib, but won't cause link
4707 errors. Archives are handled elsewhere. */
4708 fdh = make_fdh (info, eh);
4709 if (fdh == NULL)
4710 return FALSE;
4711 fdh->elf.ref_regular = 1;
4712 }
4713 }
4714 else
4715 {
4716 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4717 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4718 if (entry_vis < descr_vis)
4719 fdh->elf.other += entry_vis - descr_vis;
4720 else if (entry_vis > descr_vis)
4721 eh->elf.other += descr_vis - entry_vis;
4722
4723 if ((fdh->elf.root.type == bfd_link_hash_defined
4724 || fdh->elf.root.type == bfd_link_hash_defweak)
4725 && eh->elf.root.type == bfd_link_hash_undefined)
4726 {
4727 eh->elf.root.type = bfd_link_hash_undefweak;
4728 eh->was_undefined = 1;
4729 htab->twiddled_syms = 1;
4730 }
4731 }
4732
4733 return TRUE;
4734 }
4735
4736 /* Process list of dot-symbols we made in link_hash_newfunc. */
4737
4738 static bfd_boolean
4739 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4740 {
4741 struct ppc_link_hash_table *htab;
4742 struct ppc_link_hash_entry **p, *eh;
4743
4744 if (!is_ppc64_elf (info->output_bfd))
4745 return TRUE;
4746 htab = ppc_hash_table (info);
4747 if (htab == NULL)
4748 return FALSE;
4749
4750 if (is_ppc64_elf (ibfd))
4751 {
4752 p = &htab->dot_syms;
4753 while ((eh = *p) != NULL)
4754 {
4755 *p = NULL;
4756 if (!add_symbol_adjust (eh, info))
4757 return FALSE;
4758 p = &eh->u.next_dot_sym;
4759 }
4760 }
4761
4762 /* Clear the list for non-ppc64 input files. */
4763 p = &htab->dot_syms;
4764 while ((eh = *p) != NULL)
4765 {
4766 *p = NULL;
4767 p = &eh->u.next_dot_sym;
4768 }
4769
4770 /* We need to fix the undefs list for any syms we have twiddled to
4771 undef_weak. */
4772 if (htab->twiddled_syms)
4773 {
4774 bfd_link_repair_undef_list (&htab->elf.root);
4775 htab->twiddled_syms = 0;
4776 }
4777 return TRUE;
4778 }
4779
4780 /* Undo hash table changes when an --as-needed input file is determined
4781 not to be needed. */
4782
4783 static bfd_boolean
4784 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4785 struct bfd_link_info *info)
4786 {
4787 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4788
4789 if (htab == NULL)
4790 return FALSE;
4791
4792 htab->dot_syms = NULL;
4793 return TRUE;
4794 }
4795
4796 /* If --just-symbols against a final linked binary, then assume we need
4797 toc adjusting stubs when calling functions defined there. */
4798
4799 static void
4800 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4801 {
4802 if ((sec->flags & SEC_CODE) != 0
4803 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4804 && is_ppc64_elf (sec->owner))
4805 {
4806 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4807 if (got != NULL
4808 && got->size >= elf_backend_got_header_size
4809 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4810 sec->has_toc_reloc = 1;
4811 }
4812 _bfd_elf_link_just_syms (sec, info);
4813 }
4814
4815 static struct plt_entry **
4816 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4817 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4818 {
4819 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4820 struct plt_entry **local_plt;
4821 unsigned char *local_got_tls_masks;
4822
4823 if (local_got_ents == NULL)
4824 {
4825 bfd_size_type size = symtab_hdr->sh_info;
4826
4827 size *= (sizeof (*local_got_ents)
4828 + sizeof (*local_plt)
4829 + sizeof (*local_got_tls_masks));
4830 local_got_ents = bfd_zalloc (abfd, size);
4831 if (local_got_ents == NULL)
4832 return NULL;
4833 elf_local_got_ents (abfd) = local_got_ents;
4834 }
4835
4836 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4837 {
4838 struct got_entry *ent;
4839
4840 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4841 if (ent->addend == r_addend
4842 && ent->owner == abfd
4843 && ent->tls_type == tls_type)
4844 break;
4845 if (ent == NULL)
4846 {
4847 bfd_size_type amt = sizeof (*ent);
4848 ent = bfd_alloc (abfd, amt);
4849 if (ent == NULL)
4850 return FALSE;
4851 ent->next = local_got_ents[r_symndx];
4852 ent->addend = r_addend;
4853 ent->owner = abfd;
4854 ent->tls_type = tls_type;
4855 ent->is_indirect = FALSE;
4856 ent->got.refcount = 0;
4857 local_got_ents[r_symndx] = ent;
4858 }
4859 ent->got.refcount += 1;
4860 }
4861
4862 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4863 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4864 local_got_tls_masks[r_symndx] |= tls_type;
4865
4866 return local_plt + r_symndx;
4867 }
4868
4869 static bfd_boolean
4870 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4871 {
4872 struct plt_entry *ent;
4873
4874 for (ent = *plist; ent != NULL; ent = ent->next)
4875 if (ent->addend == addend)
4876 break;
4877 if (ent == NULL)
4878 {
4879 bfd_size_type amt = sizeof (*ent);
4880 ent = bfd_alloc (abfd, amt);
4881 if (ent == NULL)
4882 return FALSE;
4883 ent->next = *plist;
4884 ent->addend = addend;
4885 ent->plt.refcount = 0;
4886 *plist = ent;
4887 }
4888 ent->plt.refcount += 1;
4889 return TRUE;
4890 }
4891
4892 static bfd_boolean
4893 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4894 {
4895 return (r_type == R_PPC64_REL24
4896 || r_type == R_PPC64_REL14
4897 || r_type == R_PPC64_REL14_BRTAKEN
4898 || r_type == R_PPC64_REL14_BRNTAKEN
4899 || r_type == R_PPC64_ADDR24
4900 || r_type == R_PPC64_ADDR14
4901 || r_type == R_PPC64_ADDR14_BRTAKEN
4902 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4903 }
4904
4905 /* Look through the relocs for a section during the first phase, and
4906 calculate needed space in the global offset table, procedure
4907 linkage table, and dynamic reloc sections. */
4908
4909 static bfd_boolean
4910 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4911 asection *sec, const Elf_Internal_Rela *relocs)
4912 {
4913 struct ppc_link_hash_table *htab;
4914 Elf_Internal_Shdr *symtab_hdr;
4915 struct elf_link_hash_entry **sym_hashes;
4916 const Elf_Internal_Rela *rel;
4917 const Elf_Internal_Rela *rel_end;
4918 asection *sreloc;
4919 asection **opd_sym_map;
4920 struct elf_link_hash_entry *tga, *dottga;
4921
4922 if (info->relocatable)
4923 return TRUE;
4924
4925 /* Don't do anything special with non-loaded, non-alloced sections.
4926 In particular, any relocs in such sections should not affect GOT
4927 and PLT reference counting (ie. we don't allow them to create GOT
4928 or PLT entries), there's no possibility or desire to optimize TLS
4929 relocs, and there's not much point in propagating relocs to shared
4930 libs that the dynamic linker won't relocate. */
4931 if ((sec->flags & SEC_ALLOC) == 0)
4932 return TRUE;
4933
4934 BFD_ASSERT (is_ppc64_elf (abfd));
4935
4936 htab = ppc_hash_table (info);
4937 if (htab == NULL)
4938 return FALSE;
4939
4940 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4941 FALSE, FALSE, TRUE);
4942 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4943 FALSE, FALSE, TRUE);
4944 symtab_hdr = &elf_symtab_hdr (abfd);
4945 sym_hashes = elf_sym_hashes (abfd);
4946 sreloc = NULL;
4947 opd_sym_map = NULL;
4948 if (strcmp (sec->name, ".opd") == 0)
4949 {
4950 /* Garbage collection needs some extra help with .opd sections.
4951 We don't want to necessarily keep everything referenced by
4952 relocs in .opd, as that would keep all functions. Instead,
4953 if we reference an .opd symbol (a function descriptor), we
4954 want to keep the function code symbol's section. This is
4955 easy for global symbols, but for local syms we need to keep
4956 information about the associated function section. */
4957 bfd_size_type amt;
4958
4959 amt = sec->size * sizeof (*opd_sym_map) / 8;
4960 opd_sym_map = bfd_zalloc (abfd, amt);
4961 if (opd_sym_map == NULL)
4962 return FALSE;
4963 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4964 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4965 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4966 }
4967
4968 if (htab->sfpr == NULL
4969 && !create_linkage_sections (htab->elf.dynobj, info))
4970 return FALSE;
4971
4972 rel_end = relocs + sec->reloc_count;
4973 for (rel = relocs; rel < rel_end; rel++)
4974 {
4975 unsigned long r_symndx;
4976 struct elf_link_hash_entry *h;
4977 enum elf_ppc64_reloc_type r_type;
4978 int tls_type;
4979 struct _ppc64_elf_section_data *ppc64_sec;
4980 struct plt_entry **ifunc;
4981
4982 r_symndx = ELF64_R_SYM (rel->r_info);
4983 if (r_symndx < symtab_hdr->sh_info)
4984 h = NULL;
4985 else
4986 {
4987 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4988 h = elf_follow_link (h);
4989 }
4990
4991 tls_type = 0;
4992 ifunc = NULL;
4993 if (h != NULL)
4994 {
4995 if (h->type == STT_GNU_IFUNC)
4996 {
4997 h->needs_plt = 1;
4998 ifunc = &h->plt.plist;
4999 }
5000 }
5001 else
5002 {
5003 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5004 abfd, r_symndx);
5005 if (isym == NULL)
5006 return FALSE;
5007
5008 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5009 {
5010 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5011 rel->r_addend, PLT_IFUNC);
5012 if (ifunc == NULL)
5013 return FALSE;
5014 }
5015 }
5016 r_type = ELF64_R_TYPE (rel->r_info);
5017 if (is_branch_reloc (r_type))
5018 {
5019 if (h != NULL && (h == tga || h == dottga))
5020 {
5021 if (rel != relocs
5022 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5023 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5024 /* We have a new-style __tls_get_addr call with a marker
5025 reloc. */
5026 ;
5027 else
5028 /* Mark this section as having an old-style call. */
5029 sec->has_tls_get_addr_call = 1;
5030 }
5031
5032 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5033 if (ifunc != NULL
5034 && !update_plt_info (abfd, ifunc, rel->r_addend))
5035 return FALSE;
5036 }
5037
5038 switch (r_type)
5039 {
5040 case R_PPC64_TLSGD:
5041 case R_PPC64_TLSLD:
5042 /* These special tls relocs tie a call to __tls_get_addr with
5043 its parameter symbol. */
5044 break;
5045
5046 case R_PPC64_GOT_TLSLD16:
5047 case R_PPC64_GOT_TLSLD16_LO:
5048 case R_PPC64_GOT_TLSLD16_HI:
5049 case R_PPC64_GOT_TLSLD16_HA:
5050 tls_type = TLS_TLS | TLS_LD;
5051 goto dogottls;
5052
5053 case R_PPC64_GOT_TLSGD16:
5054 case R_PPC64_GOT_TLSGD16_LO:
5055 case R_PPC64_GOT_TLSGD16_HI:
5056 case R_PPC64_GOT_TLSGD16_HA:
5057 tls_type = TLS_TLS | TLS_GD;
5058 goto dogottls;
5059
5060 case R_PPC64_GOT_TPREL16_DS:
5061 case R_PPC64_GOT_TPREL16_LO_DS:
5062 case R_PPC64_GOT_TPREL16_HI:
5063 case R_PPC64_GOT_TPREL16_HA:
5064 if (!info->executable)
5065 info->flags |= DF_STATIC_TLS;
5066 tls_type = TLS_TLS | TLS_TPREL;
5067 goto dogottls;
5068
5069 case R_PPC64_GOT_DTPREL16_DS:
5070 case R_PPC64_GOT_DTPREL16_LO_DS:
5071 case R_PPC64_GOT_DTPREL16_HI:
5072 case R_PPC64_GOT_DTPREL16_HA:
5073 tls_type = TLS_TLS | TLS_DTPREL;
5074 dogottls:
5075 sec->has_tls_reloc = 1;
5076 /* Fall thru */
5077
5078 case R_PPC64_GOT16:
5079 case R_PPC64_GOT16_DS:
5080 case R_PPC64_GOT16_HA:
5081 case R_PPC64_GOT16_HI:
5082 case R_PPC64_GOT16_LO:
5083 case R_PPC64_GOT16_LO_DS:
5084 /* This symbol requires a global offset table entry. */
5085 sec->has_toc_reloc = 1;
5086 if (r_type == R_PPC64_GOT_TLSLD16
5087 || r_type == R_PPC64_GOT_TLSGD16
5088 || r_type == R_PPC64_GOT_TPREL16_DS
5089 || r_type == R_PPC64_GOT_DTPREL16_DS
5090 || r_type == R_PPC64_GOT16
5091 || r_type == R_PPC64_GOT16_DS)
5092 {
5093 htab->do_multi_toc = 1;
5094 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5095 }
5096
5097 if (ppc64_elf_tdata (abfd)->got == NULL
5098 && !create_got_section (abfd, info))
5099 return FALSE;
5100
5101 if (h != NULL)
5102 {
5103 struct ppc_link_hash_entry *eh;
5104 struct got_entry *ent;
5105
5106 eh = (struct ppc_link_hash_entry *) h;
5107 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5108 if (ent->addend == rel->r_addend
5109 && ent->owner == abfd
5110 && ent->tls_type == tls_type)
5111 break;
5112 if (ent == NULL)
5113 {
5114 bfd_size_type amt = sizeof (*ent);
5115 ent = bfd_alloc (abfd, amt);
5116 if (ent == NULL)
5117 return FALSE;
5118 ent->next = eh->elf.got.glist;
5119 ent->addend = rel->r_addend;
5120 ent->owner = abfd;
5121 ent->tls_type = tls_type;
5122 ent->is_indirect = FALSE;
5123 ent->got.refcount = 0;
5124 eh->elf.got.glist = ent;
5125 }
5126 ent->got.refcount += 1;
5127 eh->tls_mask |= tls_type;
5128 }
5129 else
5130 /* This is a global offset table entry for a local symbol. */
5131 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5132 rel->r_addend, tls_type))
5133 return FALSE;
5134 break;
5135
5136 case R_PPC64_PLT16_HA:
5137 case R_PPC64_PLT16_HI:
5138 case R_PPC64_PLT16_LO:
5139 case R_PPC64_PLT32:
5140 case R_PPC64_PLT64:
5141 /* This symbol requires a procedure linkage table entry. We
5142 actually build the entry in adjust_dynamic_symbol,
5143 because this might be a case of linking PIC code without
5144 linking in any dynamic objects, in which case we don't
5145 need to generate a procedure linkage table after all. */
5146 if (h == NULL)
5147 {
5148 /* It does not make sense to have a procedure linkage
5149 table entry for a local symbol. */
5150 bfd_set_error (bfd_error_bad_value);
5151 return FALSE;
5152 }
5153 else
5154 {
5155 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5156 return FALSE;
5157 h->needs_plt = 1;
5158 if (h->root.root.string[0] == '.'
5159 && h->root.root.string[1] != '\0')
5160 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5161 }
5162 break;
5163
5164 /* The following relocations don't need to propagate the
5165 relocation if linking a shared object since they are
5166 section relative. */
5167 case R_PPC64_SECTOFF:
5168 case R_PPC64_SECTOFF_LO:
5169 case R_PPC64_SECTOFF_HI:
5170 case R_PPC64_SECTOFF_HA:
5171 case R_PPC64_SECTOFF_DS:
5172 case R_PPC64_SECTOFF_LO_DS:
5173 case R_PPC64_DTPREL16:
5174 case R_PPC64_DTPREL16_LO:
5175 case R_PPC64_DTPREL16_HI:
5176 case R_PPC64_DTPREL16_HA:
5177 case R_PPC64_DTPREL16_DS:
5178 case R_PPC64_DTPREL16_LO_DS:
5179 case R_PPC64_DTPREL16_HIGHER:
5180 case R_PPC64_DTPREL16_HIGHERA:
5181 case R_PPC64_DTPREL16_HIGHEST:
5182 case R_PPC64_DTPREL16_HIGHESTA:
5183 break;
5184
5185 /* Nor do these. */
5186 case R_PPC64_REL16:
5187 case R_PPC64_REL16_LO:
5188 case R_PPC64_REL16_HI:
5189 case R_PPC64_REL16_HA:
5190 break;
5191
5192 case R_PPC64_TOC16:
5193 case R_PPC64_TOC16_DS:
5194 htab->do_multi_toc = 1;
5195 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5196 case R_PPC64_TOC16_LO:
5197 case R_PPC64_TOC16_HI:
5198 case R_PPC64_TOC16_HA:
5199 case R_PPC64_TOC16_LO_DS:
5200 sec->has_toc_reloc = 1;
5201 break;
5202
5203 /* This relocation describes the C++ object vtable hierarchy.
5204 Reconstruct it for later use during GC. */
5205 case R_PPC64_GNU_VTINHERIT:
5206 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5207 return FALSE;
5208 break;
5209
5210 /* This relocation describes which C++ vtable entries are actually
5211 used. Record for later use during GC. */
5212 case R_PPC64_GNU_VTENTRY:
5213 BFD_ASSERT (h != NULL);
5214 if (h != NULL
5215 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5216 return FALSE;
5217 break;
5218
5219 case R_PPC64_REL14:
5220 case R_PPC64_REL14_BRTAKEN:
5221 case R_PPC64_REL14_BRNTAKEN:
5222 {
5223 asection *dest = NULL;
5224
5225 /* Heuristic: If jumping outside our section, chances are
5226 we are going to need a stub. */
5227 if (h != NULL)
5228 {
5229 /* If the sym is weak it may be overridden later, so
5230 don't assume we know where a weak sym lives. */
5231 if (h->root.type == bfd_link_hash_defined)
5232 dest = h->root.u.def.section;
5233 }
5234 else
5235 {
5236 Elf_Internal_Sym *isym;
5237
5238 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5239 abfd, r_symndx);
5240 if (isym == NULL)
5241 return FALSE;
5242
5243 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5244 }
5245
5246 if (dest != sec)
5247 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL24:
5252 if (h != NULL && ifunc == NULL)
5253 {
5254 /* We may need a .plt entry if the function this reloc
5255 refers to is in a shared lib. */
5256 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5257 return FALSE;
5258 h->needs_plt = 1;
5259 if (h->root.root.string[0] == '.'
5260 && h->root.root.string[1] != '\0')
5261 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5262 if (h == tga || h == dottga)
5263 sec->has_tls_reloc = 1;
5264 }
5265 break;
5266
5267 case R_PPC64_TPREL64:
5268 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5269 if (!info->executable)
5270 info->flags |= DF_STATIC_TLS;
5271 goto dotlstoc;
5272
5273 case R_PPC64_DTPMOD64:
5274 if (rel + 1 < rel_end
5275 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5276 && rel[1].r_offset == rel->r_offset + 8)
5277 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5278 else
5279 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5280 goto dotlstoc;
5281
5282 case R_PPC64_DTPREL64:
5283 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5284 if (rel != relocs
5285 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5286 && rel[-1].r_offset == rel->r_offset - 8)
5287 /* This is the second reloc of a dtpmod, dtprel pair.
5288 Don't mark with TLS_DTPREL. */
5289 goto dodyn;
5290
5291 dotlstoc:
5292 sec->has_tls_reloc = 1;
5293 if (h != NULL)
5294 {
5295 struct ppc_link_hash_entry *eh;
5296 eh = (struct ppc_link_hash_entry *) h;
5297 eh->tls_mask |= tls_type;
5298 }
5299 else
5300 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5301 rel->r_addend, tls_type))
5302 return FALSE;
5303
5304 ppc64_sec = ppc64_elf_section_data (sec);
5305 if (ppc64_sec->sec_type != sec_toc)
5306 {
5307 bfd_size_type amt;
5308
5309 /* One extra to simplify get_tls_mask. */
5310 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5311 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5312 if (ppc64_sec->u.toc.symndx == NULL)
5313 return FALSE;
5314 amt = sec->size * sizeof (bfd_vma) / 8;
5315 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5316 if (ppc64_sec->u.toc.add == NULL)
5317 return FALSE;
5318 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5319 ppc64_sec->sec_type = sec_toc;
5320 }
5321 BFD_ASSERT (rel->r_offset % 8 == 0);
5322 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5323 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5324
5325 /* Mark the second slot of a GD or LD entry.
5326 -1 to indicate GD and -2 to indicate LD. */
5327 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5328 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5329 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5330 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5331 goto dodyn;
5332
5333 case R_PPC64_TPREL16:
5334 case R_PPC64_TPREL16_LO:
5335 case R_PPC64_TPREL16_HI:
5336 case R_PPC64_TPREL16_HA:
5337 case R_PPC64_TPREL16_DS:
5338 case R_PPC64_TPREL16_LO_DS:
5339 case R_PPC64_TPREL16_HIGHER:
5340 case R_PPC64_TPREL16_HIGHERA:
5341 case R_PPC64_TPREL16_HIGHEST:
5342 case R_PPC64_TPREL16_HIGHESTA:
5343 if (info->shared)
5344 {
5345 if (!info->executable)
5346 info->flags |= DF_STATIC_TLS;
5347 goto dodyn;
5348 }
5349 break;
5350
5351 case R_PPC64_ADDR64:
5352 if (opd_sym_map != NULL
5353 && rel + 1 < rel_end
5354 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5355 {
5356 if (h != NULL)
5357 {
5358 if (h->root.root.string[0] == '.'
5359 && h->root.root.string[1] != 0
5360 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5361 ;
5362 else
5363 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5364 }
5365 else
5366 {
5367 asection *s;
5368 Elf_Internal_Sym *isym;
5369
5370 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5371 abfd, r_symndx);
5372 if (isym == NULL)
5373 return FALSE;
5374
5375 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5376 if (s != NULL && s != sec)
5377 opd_sym_map[rel->r_offset / 8] = s;
5378 }
5379 }
5380 /* Fall through. */
5381
5382 case R_PPC64_REL30:
5383 case R_PPC64_REL32:
5384 case R_PPC64_REL64:
5385 case R_PPC64_ADDR14:
5386 case R_PPC64_ADDR14_BRNTAKEN:
5387 case R_PPC64_ADDR14_BRTAKEN:
5388 case R_PPC64_ADDR16:
5389 case R_PPC64_ADDR16_DS:
5390 case R_PPC64_ADDR16_HA:
5391 case R_PPC64_ADDR16_HI:
5392 case R_PPC64_ADDR16_HIGHER:
5393 case R_PPC64_ADDR16_HIGHERA:
5394 case R_PPC64_ADDR16_HIGHEST:
5395 case R_PPC64_ADDR16_HIGHESTA:
5396 case R_PPC64_ADDR16_LO:
5397 case R_PPC64_ADDR16_LO_DS:
5398 case R_PPC64_ADDR24:
5399 case R_PPC64_ADDR32:
5400 case R_PPC64_UADDR16:
5401 case R_PPC64_UADDR32:
5402 case R_PPC64_UADDR64:
5403 case R_PPC64_TOC:
5404 if (h != NULL && !info->shared)
5405 /* We may need a copy reloc. */
5406 h->non_got_ref = 1;
5407
5408 /* Don't propagate .opd relocs. */
5409 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5410 break;
5411
5412 /* If we are creating a shared library, and this is a reloc
5413 against a global symbol, or a non PC relative reloc
5414 against a local symbol, then we need to copy the reloc
5415 into the shared library. However, if we are linking with
5416 -Bsymbolic, we do not need to copy a reloc against a
5417 global symbol which is defined in an object we are
5418 including in the link (i.e., DEF_REGULAR is set). At
5419 this point we have not seen all the input files, so it is
5420 possible that DEF_REGULAR is not set now but will be set
5421 later (it is never cleared). In case of a weak definition,
5422 DEF_REGULAR may be cleared later by a strong definition in
5423 a shared library. We account for that possibility below by
5424 storing information in the dyn_relocs field of the hash
5425 table entry. A similar situation occurs when creating
5426 shared libraries and symbol visibility changes render the
5427 symbol local.
5428
5429 If on the other hand, we are creating an executable, we
5430 may need to keep relocations for symbols satisfied by a
5431 dynamic library if we manage to avoid copy relocs for the
5432 symbol. */
5433 dodyn:
5434 if ((info->shared
5435 && (must_be_dyn_reloc (info, r_type)
5436 || (h != NULL
5437 && (! info->symbolic
5438 || h->root.type == bfd_link_hash_defweak
5439 || !h->def_regular))))
5440 || (ELIMINATE_COPY_RELOCS
5441 && !info->shared
5442 && h != NULL
5443 && (h->root.type == bfd_link_hash_defweak
5444 || !h->def_regular))
5445 || (!info->shared
5446 && ifunc != NULL))
5447 {
5448 struct elf_dyn_relocs *p;
5449 struct elf_dyn_relocs **head;
5450
5451 /* We must copy these reloc types into the output file.
5452 Create a reloc section in dynobj and make room for
5453 this reloc. */
5454 if (sreloc == NULL)
5455 {
5456 sreloc = _bfd_elf_make_dynamic_reloc_section
5457 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5458
5459 if (sreloc == NULL)
5460 return FALSE;
5461 }
5462
5463 /* If this is a global symbol, we count the number of
5464 relocations we need for this symbol. */
5465 if (h != NULL)
5466 {
5467 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5468 }
5469 else
5470 {
5471 /* Track dynamic relocs needed for local syms too.
5472 We really need local syms available to do this
5473 easily. Oh well. */
5474 asection *s;
5475 void *vpp;
5476 Elf_Internal_Sym *isym;
5477
5478 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5479 abfd, r_symndx);
5480 if (isym == NULL)
5481 return FALSE;
5482
5483 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5484 if (s == NULL)
5485 s = sec;
5486
5487 vpp = &elf_section_data (s)->local_dynrel;
5488 head = (struct elf_dyn_relocs **) vpp;
5489 }
5490
5491 p = *head;
5492 if (p == NULL || p->sec != sec)
5493 {
5494 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5495 if (p == NULL)
5496 return FALSE;
5497 p->next = *head;
5498 *head = p;
5499 p->sec = sec;
5500 p->count = 0;
5501 p->pc_count = 0;
5502 }
5503
5504 p->count += 1;
5505 if (!must_be_dyn_reloc (info, r_type))
5506 p->pc_count += 1;
5507 }
5508 break;
5509
5510 default:
5511 break;
5512 }
5513 }
5514
5515 return TRUE;
5516 }
5517
5518 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5519 of the code entry point, and its section. */
5520
5521 static bfd_vma
5522 opd_entry_value (asection *opd_sec,
5523 bfd_vma offset,
5524 asection **code_sec,
5525 bfd_vma *code_off,
5526 bfd_boolean in_code_sec)
5527 {
5528 bfd *opd_bfd = opd_sec->owner;
5529 Elf_Internal_Rela *relocs;
5530 Elf_Internal_Rela *lo, *hi, *look;
5531 bfd_vma val;
5532
5533 /* No relocs implies we are linking a --just-symbols object, or looking
5534 at a final linked executable with addr2line or somesuch. */
5535 if (opd_sec->reloc_count == 0)
5536 {
5537 char buf[8];
5538
5539 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5540 return (bfd_vma) -1;
5541
5542 val = bfd_get_64 (opd_bfd, buf);
5543 if (code_sec != NULL)
5544 {
5545 asection *sec, *likely = NULL;
5546
5547 if (in_code_sec)
5548 {
5549 sec = *code_sec;
5550 if (sec->vma <= val
5551 && val < sec->vma + sec->size)
5552 likely = sec;
5553 else
5554 val = -1;
5555 }
5556 else
5557 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5558 if (sec->vma <= val
5559 && (sec->flags & SEC_LOAD) != 0
5560 && (sec->flags & SEC_ALLOC) != 0)
5561 likely = sec;
5562 if (likely != NULL)
5563 {
5564 *code_sec = likely;
5565 if (code_off != NULL)
5566 *code_off = val - likely->vma;
5567 }
5568 }
5569 return val;
5570 }
5571
5572 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5573
5574 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5575 if (relocs == NULL)
5576 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5577
5578 /* Go find the opd reloc at the sym address. */
5579 lo = relocs;
5580 BFD_ASSERT (lo != NULL);
5581 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5582 val = (bfd_vma) -1;
5583 while (lo < hi)
5584 {
5585 look = lo + (hi - lo) / 2;
5586 if (look->r_offset < offset)
5587 lo = look + 1;
5588 else if (look->r_offset > offset)
5589 hi = look;
5590 else
5591 {
5592 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5593
5594 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5595 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5596 {
5597 unsigned long symndx = ELF64_R_SYM (look->r_info);
5598 asection *sec;
5599
5600 if (symndx < symtab_hdr->sh_info
5601 || elf_sym_hashes (opd_bfd) == NULL)
5602 {
5603 Elf_Internal_Sym *sym;
5604
5605 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5606 if (sym == NULL)
5607 {
5608 size_t symcnt = symtab_hdr->sh_info;
5609 if (elf_sym_hashes (opd_bfd) == NULL)
5610 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5611 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5612 0, NULL, NULL, NULL);
5613 if (sym == NULL)
5614 break;
5615 symtab_hdr->contents = (bfd_byte *) sym;
5616 }
5617
5618 sym += symndx;
5619 val = sym->st_value;
5620 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5621 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5622 }
5623 else
5624 {
5625 struct elf_link_hash_entry **sym_hashes;
5626 struct elf_link_hash_entry *rh;
5627
5628 sym_hashes = elf_sym_hashes (opd_bfd);
5629 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5630 rh = elf_follow_link (rh);
5631 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5632 || rh->root.type == bfd_link_hash_defweak);
5633 val = rh->root.u.def.value;
5634 sec = rh->root.u.def.section;
5635 }
5636 val += look->r_addend;
5637 if (code_off != NULL)
5638 *code_off = val;
5639 if (code_sec != NULL)
5640 {
5641 if (in_code_sec && *code_sec != sec)
5642 return -1;
5643 else
5644 *code_sec = sec;
5645 }
5646 if (sec != NULL && sec->output_section != NULL)
5647 val += sec->output_section->vma + sec->output_offset;
5648 }
5649 break;
5650 }
5651 }
5652
5653 return val;
5654 }
5655
5656 /* If the ELF symbol SYM might be a function in SEC, return the
5657 function size and set *CODE_OFF to the function's entry point,
5658 otherwise return zero. */
5659
5660 static bfd_size_type
5661 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5662 bfd_vma *code_off)
5663 {
5664 bfd_size_type size;
5665
5666 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5667 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5668 return 0;
5669
5670 size = 0;
5671 if (!(sym->flags & BSF_SYNTHETIC))
5672 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5673
5674 if (strcmp (sym->section->name, ".opd") == 0)
5675 {
5676 if (opd_entry_value (sym->section, sym->value,
5677 &sec, code_off, TRUE) == (bfd_vma) -1)
5678 return 0;
5679 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5680 symbol. This size has nothing to do with the code size of the
5681 function, which is what we're supposed to return, but the
5682 code size isn't available without looking up the dot-sym.
5683 However, doing that would be a waste of time particularly
5684 since elf_find_function will look at the dot-sym anyway.
5685 Now, elf_find_function will keep the largest size of any
5686 function sym found at the code address of interest, so return
5687 1 here to avoid it incorrectly caching a larger function size
5688 for a small function. This does mean we return the wrong
5689 size for a new-ABI function of size 24, but all that does is
5690 disable caching for such functions. */
5691 if (size == 24)
5692 size = 1;
5693 }
5694 else
5695 {
5696 if (sym->section != sec)
5697 return 0;
5698 *code_off = sym->value;
5699 }
5700 if (size == 0)
5701 size = 1;
5702 return size;
5703 }
5704
5705 /* Return true if symbol is defined in a regular object file. */
5706
5707 static bfd_boolean
5708 is_static_defined (struct elf_link_hash_entry *h)
5709 {
5710 return ((h->root.type == bfd_link_hash_defined
5711 || h->root.type == bfd_link_hash_defweak)
5712 && h->root.u.def.section != NULL
5713 && h->root.u.def.section->output_section != NULL);
5714 }
5715
5716 /* If FDH is a function descriptor symbol, return the associated code
5717 entry symbol if it is defined. Return NULL otherwise. */
5718
5719 static struct ppc_link_hash_entry *
5720 defined_code_entry (struct ppc_link_hash_entry *fdh)
5721 {
5722 if (fdh->is_func_descriptor)
5723 {
5724 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5725 if (fh->elf.root.type == bfd_link_hash_defined
5726 || fh->elf.root.type == bfd_link_hash_defweak)
5727 return fh;
5728 }
5729 return NULL;
5730 }
5731
5732 /* If FH is a function code entry symbol, return the associated
5733 function descriptor symbol if it is defined. Return NULL otherwise. */
5734
5735 static struct ppc_link_hash_entry *
5736 defined_func_desc (struct ppc_link_hash_entry *fh)
5737 {
5738 if (fh->oh != NULL
5739 && fh->oh->is_func_descriptor)
5740 {
5741 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5742 if (fdh->elf.root.type == bfd_link_hash_defined
5743 || fdh->elf.root.type == bfd_link_hash_defweak)
5744 return fdh;
5745 }
5746 return NULL;
5747 }
5748
5749 /* Mark all our entry sym sections, both opd and code section. */
5750
5751 static void
5752 ppc64_elf_gc_keep (struct bfd_link_info *info)
5753 {
5754 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5755 struct bfd_sym_chain *sym;
5756
5757 if (htab == NULL)
5758 return;
5759
5760 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5761 {
5762 struct ppc_link_hash_entry *eh, *fh;
5763 asection *sec;
5764
5765 eh = (struct ppc_link_hash_entry *)
5766 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5767 if (eh == NULL)
5768 continue;
5769 if (eh->elf.root.type != bfd_link_hash_defined
5770 && eh->elf.root.type != bfd_link_hash_defweak)
5771 continue;
5772
5773 fh = defined_code_entry (eh);
5774 if (fh != NULL)
5775 {
5776 sec = fh->elf.root.u.def.section;
5777 sec->flags |= SEC_KEEP;
5778 }
5779 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5780 && opd_entry_value (eh->elf.root.u.def.section,
5781 eh->elf.root.u.def.value,
5782 &sec, NULL, FALSE) != (bfd_vma) -1)
5783 sec->flags |= SEC_KEEP;
5784
5785 sec = eh->elf.root.u.def.section;
5786 sec->flags |= SEC_KEEP;
5787 }
5788 }
5789
5790 /* Mark sections containing dynamically referenced symbols. When
5791 building shared libraries, we must assume that any visible symbol is
5792 referenced. */
5793
5794 static bfd_boolean
5795 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5796 {
5797 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5798 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5799 struct ppc_link_hash_entry *fdh;
5800
5801 /* Dynamic linking info is on the func descriptor sym. */
5802 fdh = defined_func_desc (eh);
5803 if (fdh != NULL)
5804 eh = fdh;
5805
5806 if ((eh->elf.root.type == bfd_link_hash_defined
5807 || eh->elf.root.type == bfd_link_hash_defweak)
5808 && (eh->elf.ref_dynamic
5809 || (!info->executable
5810 && eh->elf.def_regular
5811 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5812 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5813 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5814 || !bfd_hide_sym_by_version (info->version_info,
5815 eh->elf.root.root.string)))))
5816 {
5817 asection *code_sec;
5818 struct ppc_link_hash_entry *fh;
5819
5820 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5821
5822 /* Function descriptor syms cause the associated
5823 function code sym section to be marked. */
5824 fh = defined_code_entry (eh);
5825 if (fh != NULL)
5826 {
5827 code_sec = fh->elf.root.u.def.section;
5828 code_sec->flags |= SEC_KEEP;
5829 }
5830 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5831 && opd_entry_value (eh->elf.root.u.def.section,
5832 eh->elf.root.u.def.value,
5833 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5834 code_sec->flags |= SEC_KEEP;
5835 }
5836
5837 return TRUE;
5838 }
5839
5840 /* Return the section that should be marked against GC for a given
5841 relocation. */
5842
5843 static asection *
5844 ppc64_elf_gc_mark_hook (asection *sec,
5845 struct bfd_link_info *info,
5846 Elf_Internal_Rela *rel,
5847 struct elf_link_hash_entry *h,
5848 Elf_Internal_Sym *sym)
5849 {
5850 asection *rsec;
5851
5852 /* Syms return NULL if we're marking .opd, so we avoid marking all
5853 function sections, as all functions are referenced in .opd. */
5854 rsec = NULL;
5855 if (get_opd_info (sec) != NULL)
5856 return rsec;
5857
5858 if (h != NULL)
5859 {
5860 enum elf_ppc64_reloc_type r_type;
5861 struct ppc_link_hash_entry *eh, *fh, *fdh;
5862
5863 r_type = ELF64_R_TYPE (rel->r_info);
5864 switch (r_type)
5865 {
5866 case R_PPC64_GNU_VTINHERIT:
5867 case R_PPC64_GNU_VTENTRY:
5868 break;
5869
5870 default:
5871 switch (h->root.type)
5872 {
5873 case bfd_link_hash_defined:
5874 case bfd_link_hash_defweak:
5875 eh = (struct ppc_link_hash_entry *) h;
5876 fdh = defined_func_desc (eh);
5877 if (fdh != NULL)
5878 eh = fdh;
5879
5880 /* Function descriptor syms cause the associated
5881 function code sym section to be marked. */
5882 fh = defined_code_entry (eh);
5883 if (fh != NULL)
5884 {
5885 /* They also mark their opd section. */
5886 eh->elf.root.u.def.section->gc_mark = 1;
5887
5888 rsec = fh->elf.root.u.def.section;
5889 }
5890 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5891 && opd_entry_value (eh->elf.root.u.def.section,
5892 eh->elf.root.u.def.value,
5893 &rsec, NULL, FALSE) != (bfd_vma) -1)
5894 eh->elf.root.u.def.section->gc_mark = 1;
5895 else
5896 rsec = h->root.u.def.section;
5897 break;
5898
5899 case bfd_link_hash_common:
5900 rsec = h->root.u.c.p->section;
5901 break;
5902
5903 default:
5904 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5905 }
5906 }
5907 }
5908 else
5909 {
5910 struct _opd_sec_data *opd;
5911
5912 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5913 opd = get_opd_info (rsec);
5914 if (opd != NULL && opd->func_sec != NULL)
5915 {
5916 rsec->gc_mark = 1;
5917
5918 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5919 }
5920 }
5921
5922 return rsec;
5923 }
5924
5925 /* Update the .got, .plt. and dynamic reloc reference counts for the
5926 section being removed. */
5927
5928 static bfd_boolean
5929 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5930 asection *sec, const Elf_Internal_Rela *relocs)
5931 {
5932 struct ppc_link_hash_table *htab;
5933 Elf_Internal_Shdr *symtab_hdr;
5934 struct elf_link_hash_entry **sym_hashes;
5935 struct got_entry **local_got_ents;
5936 const Elf_Internal_Rela *rel, *relend;
5937
5938 if (info->relocatable)
5939 return TRUE;
5940
5941 if ((sec->flags & SEC_ALLOC) == 0)
5942 return TRUE;
5943
5944 elf_section_data (sec)->local_dynrel = NULL;
5945
5946 htab = ppc_hash_table (info);
5947 if (htab == NULL)
5948 return FALSE;
5949
5950 symtab_hdr = &elf_symtab_hdr (abfd);
5951 sym_hashes = elf_sym_hashes (abfd);
5952 local_got_ents = elf_local_got_ents (abfd);
5953
5954 relend = relocs + sec->reloc_count;
5955 for (rel = relocs; rel < relend; rel++)
5956 {
5957 unsigned long r_symndx;
5958 enum elf_ppc64_reloc_type r_type;
5959 struct elf_link_hash_entry *h = NULL;
5960 unsigned char tls_type = 0;
5961
5962 r_symndx = ELF64_R_SYM (rel->r_info);
5963 r_type = ELF64_R_TYPE (rel->r_info);
5964 if (r_symndx >= symtab_hdr->sh_info)
5965 {
5966 struct ppc_link_hash_entry *eh;
5967 struct elf_dyn_relocs **pp;
5968 struct elf_dyn_relocs *p;
5969
5970 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5971 h = elf_follow_link (h);
5972 eh = (struct ppc_link_hash_entry *) h;
5973
5974 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5975 if (p->sec == sec)
5976 {
5977 /* Everything must go for SEC. */
5978 *pp = p->next;
5979 break;
5980 }
5981 }
5982
5983 if (is_branch_reloc (r_type))
5984 {
5985 struct plt_entry **ifunc = NULL;
5986 if (h != NULL)
5987 {
5988 if (h->type == STT_GNU_IFUNC)
5989 ifunc = &h->plt.plist;
5990 }
5991 else if (local_got_ents != NULL)
5992 {
5993 struct plt_entry **local_plt = (struct plt_entry **)
5994 (local_got_ents + symtab_hdr->sh_info);
5995 unsigned char *local_got_tls_masks = (unsigned char *)
5996 (local_plt + symtab_hdr->sh_info);
5997 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5998 ifunc = local_plt + r_symndx;
5999 }
6000 if (ifunc != NULL)
6001 {
6002 struct plt_entry *ent;
6003
6004 for (ent = *ifunc; ent != NULL; ent = ent->next)
6005 if (ent->addend == rel->r_addend)
6006 break;
6007 if (ent == NULL)
6008 abort ();
6009 if (ent->plt.refcount > 0)
6010 ent->plt.refcount -= 1;
6011 continue;
6012 }
6013 }
6014
6015 switch (r_type)
6016 {
6017 case R_PPC64_GOT_TLSLD16:
6018 case R_PPC64_GOT_TLSLD16_LO:
6019 case R_PPC64_GOT_TLSLD16_HI:
6020 case R_PPC64_GOT_TLSLD16_HA:
6021 tls_type = TLS_TLS | TLS_LD;
6022 goto dogot;
6023
6024 case R_PPC64_GOT_TLSGD16:
6025 case R_PPC64_GOT_TLSGD16_LO:
6026 case R_PPC64_GOT_TLSGD16_HI:
6027 case R_PPC64_GOT_TLSGD16_HA:
6028 tls_type = TLS_TLS | TLS_GD;
6029 goto dogot;
6030
6031 case R_PPC64_GOT_TPREL16_DS:
6032 case R_PPC64_GOT_TPREL16_LO_DS:
6033 case R_PPC64_GOT_TPREL16_HI:
6034 case R_PPC64_GOT_TPREL16_HA:
6035 tls_type = TLS_TLS | TLS_TPREL;
6036 goto dogot;
6037
6038 case R_PPC64_GOT_DTPREL16_DS:
6039 case R_PPC64_GOT_DTPREL16_LO_DS:
6040 case R_PPC64_GOT_DTPREL16_HI:
6041 case R_PPC64_GOT_DTPREL16_HA:
6042 tls_type = TLS_TLS | TLS_DTPREL;
6043 goto dogot;
6044
6045 case R_PPC64_GOT16:
6046 case R_PPC64_GOT16_DS:
6047 case R_PPC64_GOT16_HA:
6048 case R_PPC64_GOT16_HI:
6049 case R_PPC64_GOT16_LO:
6050 case R_PPC64_GOT16_LO_DS:
6051 dogot:
6052 {
6053 struct got_entry *ent;
6054
6055 if (h != NULL)
6056 ent = h->got.glist;
6057 else
6058 ent = local_got_ents[r_symndx];
6059
6060 for (; ent != NULL; ent = ent->next)
6061 if (ent->addend == rel->r_addend
6062 && ent->owner == abfd
6063 && ent->tls_type == tls_type)
6064 break;
6065 if (ent == NULL)
6066 abort ();
6067 if (ent->got.refcount > 0)
6068 ent->got.refcount -= 1;
6069 }
6070 break;
6071
6072 case R_PPC64_PLT16_HA:
6073 case R_PPC64_PLT16_HI:
6074 case R_PPC64_PLT16_LO:
6075 case R_PPC64_PLT32:
6076 case R_PPC64_PLT64:
6077 case R_PPC64_REL14:
6078 case R_PPC64_REL14_BRNTAKEN:
6079 case R_PPC64_REL14_BRTAKEN:
6080 case R_PPC64_REL24:
6081 if (h != NULL)
6082 {
6083 struct plt_entry *ent;
6084
6085 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6086 if (ent->addend == rel->r_addend)
6087 break;
6088 if (ent != NULL && ent->plt.refcount > 0)
6089 ent->plt.refcount -= 1;
6090 }
6091 break;
6092
6093 default:
6094 break;
6095 }
6096 }
6097 return TRUE;
6098 }
6099
6100 /* The maximum size of .sfpr. */
6101 #define SFPR_MAX (218*4)
6102
6103 struct sfpr_def_parms
6104 {
6105 const char name[12];
6106 unsigned char lo, hi;
6107 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6108 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6109 };
6110
6111 /* Auto-generate _save*, _rest* functions in .sfpr. */
6112
6113 static bfd_boolean
6114 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6115 {
6116 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6117 unsigned int i;
6118 size_t len = strlen (parm->name);
6119 bfd_boolean writing = FALSE;
6120 char sym[16];
6121
6122 if (htab == NULL)
6123 return FALSE;
6124
6125 memcpy (sym, parm->name, len);
6126 sym[len + 2] = 0;
6127
6128 for (i = parm->lo; i <= parm->hi; i++)
6129 {
6130 struct elf_link_hash_entry *h;
6131
6132 sym[len + 0] = i / 10 + '0';
6133 sym[len + 1] = i % 10 + '0';
6134 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6135 if (h != NULL
6136 && !h->def_regular)
6137 {
6138 h->root.type = bfd_link_hash_defined;
6139 h->root.u.def.section = htab->sfpr;
6140 h->root.u.def.value = htab->sfpr->size;
6141 h->type = STT_FUNC;
6142 h->def_regular = 1;
6143 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6144 writing = TRUE;
6145 if (htab->sfpr->contents == NULL)
6146 {
6147 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6148 if (htab->sfpr->contents == NULL)
6149 return FALSE;
6150 }
6151 }
6152 if (writing)
6153 {
6154 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6155 if (i != parm->hi)
6156 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6157 else
6158 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6159 htab->sfpr->size = p - htab->sfpr->contents;
6160 }
6161 }
6162
6163 return TRUE;
6164 }
6165
6166 static bfd_byte *
6167 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6168 {
6169 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6170 return p + 4;
6171 }
6172
6173 static bfd_byte *
6174 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6175 {
6176 p = savegpr0 (abfd, p, r);
6177 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6178 p = p + 4;
6179 bfd_put_32 (abfd, BLR, p);
6180 return p + 4;
6181 }
6182
6183 static bfd_byte *
6184 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6185 {
6186 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6187 return p + 4;
6188 }
6189
6190 static bfd_byte *
6191 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6192 {
6193 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6194 p = p + 4;
6195 p = restgpr0 (abfd, p, r);
6196 bfd_put_32 (abfd, MTLR_R0, p);
6197 p = p + 4;
6198 if (r == 29)
6199 {
6200 p = restgpr0 (abfd, p, 30);
6201 p = restgpr0 (abfd, p, 31);
6202 }
6203 bfd_put_32 (abfd, BLR, p);
6204 return p + 4;
6205 }
6206
6207 static bfd_byte *
6208 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6209 {
6210 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6211 return p + 4;
6212 }
6213
6214 static bfd_byte *
6215 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6216 {
6217 p = savegpr1 (abfd, p, r);
6218 bfd_put_32 (abfd, BLR, p);
6219 return p + 4;
6220 }
6221
6222 static bfd_byte *
6223 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6224 {
6225 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6226 return p + 4;
6227 }
6228
6229 static bfd_byte *
6230 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6231 {
6232 p = restgpr1 (abfd, p, r);
6233 bfd_put_32 (abfd, BLR, p);
6234 return p + 4;
6235 }
6236
6237 static bfd_byte *
6238 savefpr (bfd *abfd, bfd_byte *p, int r)
6239 {
6240 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6241 return p + 4;
6242 }
6243
6244 static bfd_byte *
6245 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6246 {
6247 p = savefpr (abfd, p, r);
6248 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6249 p = p + 4;
6250 bfd_put_32 (abfd, BLR, p);
6251 return p + 4;
6252 }
6253
6254 static bfd_byte *
6255 restfpr (bfd *abfd, bfd_byte *p, int r)
6256 {
6257 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6258 return p + 4;
6259 }
6260
6261 static bfd_byte *
6262 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6263 {
6264 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6265 p = p + 4;
6266 p = restfpr (abfd, p, r);
6267 bfd_put_32 (abfd, MTLR_R0, p);
6268 p = p + 4;
6269 if (r == 29)
6270 {
6271 p = restfpr (abfd, p, 30);
6272 p = restfpr (abfd, p, 31);
6273 }
6274 bfd_put_32 (abfd, BLR, p);
6275 return p + 4;
6276 }
6277
6278 static bfd_byte *
6279 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6280 {
6281 p = savefpr (abfd, p, r);
6282 bfd_put_32 (abfd, BLR, p);
6283 return p + 4;
6284 }
6285
6286 static bfd_byte *
6287 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6288 {
6289 p = restfpr (abfd, p, r);
6290 bfd_put_32 (abfd, BLR, p);
6291 return p + 4;
6292 }
6293
6294 static bfd_byte *
6295 savevr (bfd *abfd, bfd_byte *p, int r)
6296 {
6297 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6298 p = p + 4;
6299 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6300 return p + 4;
6301 }
6302
6303 static bfd_byte *
6304 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6305 {
6306 p = savevr (abfd, p, r);
6307 bfd_put_32 (abfd, BLR, p);
6308 return p + 4;
6309 }
6310
6311 static bfd_byte *
6312 restvr (bfd *abfd, bfd_byte *p, int r)
6313 {
6314 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6315 p = p + 4;
6316 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6317 return p + 4;
6318 }
6319
6320 static bfd_byte *
6321 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6322 {
6323 p = restvr (abfd, p, r);
6324 bfd_put_32 (abfd, BLR, p);
6325 return p + 4;
6326 }
6327
6328 /* Called via elf_link_hash_traverse to transfer dynamic linking
6329 information on function code symbol entries to their corresponding
6330 function descriptor symbol entries. */
6331
6332 static bfd_boolean
6333 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6334 {
6335 struct bfd_link_info *info;
6336 struct ppc_link_hash_table *htab;
6337 struct plt_entry *ent;
6338 struct ppc_link_hash_entry *fh;
6339 struct ppc_link_hash_entry *fdh;
6340 bfd_boolean force_local;
6341
6342 fh = (struct ppc_link_hash_entry *) h;
6343 if (fh->elf.root.type == bfd_link_hash_indirect)
6344 return TRUE;
6345
6346 info = inf;
6347 htab = ppc_hash_table (info);
6348 if (htab == NULL)
6349 return FALSE;
6350
6351 /* Resolve undefined references to dot-symbols as the value
6352 in the function descriptor, if we have one in a regular object.
6353 This is to satisfy cases like ".quad .foo". Calls to functions
6354 in dynamic objects are handled elsewhere. */
6355 if (fh->elf.root.type == bfd_link_hash_undefweak
6356 && fh->was_undefined
6357 && (fdh = defined_func_desc (fh)) != NULL
6358 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6359 && opd_entry_value (fdh->elf.root.u.def.section,
6360 fdh->elf.root.u.def.value,
6361 &fh->elf.root.u.def.section,
6362 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6363 {
6364 fh->elf.root.type = fdh->elf.root.type;
6365 fh->elf.forced_local = 1;
6366 fh->elf.def_regular = fdh->elf.def_regular;
6367 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6368 }
6369
6370 /* If this is a function code symbol, transfer dynamic linking
6371 information to the function descriptor symbol. */
6372 if (!fh->is_func)
6373 return TRUE;
6374
6375 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6376 if (ent->plt.refcount > 0)
6377 break;
6378 if (ent == NULL
6379 || fh->elf.root.root.string[0] != '.'
6380 || fh->elf.root.root.string[1] == '\0')
6381 return TRUE;
6382
6383 /* Find the corresponding function descriptor symbol. Create it
6384 as undefined if necessary. */
6385
6386 fdh = lookup_fdh (fh, htab);
6387 if (fdh == NULL
6388 && !info->executable
6389 && (fh->elf.root.type == bfd_link_hash_undefined
6390 || fh->elf.root.type == bfd_link_hash_undefweak))
6391 {
6392 fdh = make_fdh (info, fh);
6393 if (fdh == NULL)
6394 return FALSE;
6395 }
6396
6397 /* Fake function descriptors are made undefweak. If the function
6398 code symbol is strong undefined, make the fake sym the same.
6399 If the function code symbol is defined, then force the fake
6400 descriptor local; We can't support overriding of symbols in a
6401 shared library on a fake descriptor. */
6402
6403 if (fdh != NULL
6404 && fdh->fake
6405 && fdh->elf.root.type == bfd_link_hash_undefweak)
6406 {
6407 if (fh->elf.root.type == bfd_link_hash_undefined)
6408 {
6409 fdh->elf.root.type = bfd_link_hash_undefined;
6410 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6411 }
6412 else if (fh->elf.root.type == bfd_link_hash_defined
6413 || fh->elf.root.type == bfd_link_hash_defweak)
6414 {
6415 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6416 }
6417 }
6418
6419 if (fdh != NULL
6420 && !fdh->elf.forced_local
6421 && (!info->executable
6422 || fdh->elf.def_dynamic
6423 || fdh->elf.ref_dynamic
6424 || (fdh->elf.root.type == bfd_link_hash_undefweak
6425 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6426 {
6427 if (fdh->elf.dynindx == -1)
6428 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6429 return FALSE;
6430 fdh->elf.ref_regular |= fh->elf.ref_regular;
6431 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6432 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6433 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6434 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6435 {
6436 move_plt_plist (fh, fdh);
6437 fdh->elf.needs_plt = 1;
6438 }
6439 fdh->is_func_descriptor = 1;
6440 fdh->oh = fh;
6441 fh->oh = fdh;
6442 }
6443
6444 /* Now that the info is on the function descriptor, clear the
6445 function code sym info. Any function code syms for which we
6446 don't have a definition in a regular file, we force local.
6447 This prevents a shared library from exporting syms that have
6448 been imported from another library. Function code syms that
6449 are really in the library we must leave global to prevent the
6450 linker dragging in a definition from a static library. */
6451 force_local = (!fh->elf.def_regular
6452 || fdh == NULL
6453 || !fdh->elf.def_regular
6454 || fdh->elf.forced_local);
6455 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6456
6457 return TRUE;
6458 }
6459
6460 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6461 this hook to a) provide some gcc support functions, and b) transfer
6462 dynamic linking information gathered so far on function code symbol
6463 entries, to their corresponding function descriptor symbol entries. */
6464
6465 static bfd_boolean
6466 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6467 struct bfd_link_info *info)
6468 {
6469 struct ppc_link_hash_table *htab;
6470 unsigned int i;
6471 static const struct sfpr_def_parms funcs[] =
6472 {
6473 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6474 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6475 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6476 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6477 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6478 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6479 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6480 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6481 { "._savef", 14, 31, savefpr, savefpr1_tail },
6482 { "._restf", 14, 31, restfpr, restfpr1_tail },
6483 { "_savevr_", 20, 31, savevr, savevr_tail },
6484 { "_restvr_", 20, 31, restvr, restvr_tail }
6485 };
6486
6487 htab = ppc_hash_table (info);
6488 if (htab == NULL)
6489 return FALSE;
6490
6491 if (htab->sfpr == NULL)
6492 /* We don't have any relocs. */
6493 return TRUE;
6494
6495 /* Provide any missing _save* and _rest* functions. */
6496 htab->sfpr->size = 0;
6497 if (!info->relocatable)
6498 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6499 if (!sfpr_define (info, &funcs[i]))
6500 return FALSE;
6501
6502 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6503
6504 if (htab->sfpr->size == 0)
6505 htab->sfpr->flags |= SEC_EXCLUDE;
6506
6507 return TRUE;
6508 }
6509
6510 /* Adjust a symbol defined by a dynamic object and referenced by a
6511 regular object. The current definition is in some section of the
6512 dynamic object, but we're not including those sections. We have to
6513 change the definition to something the rest of the link can
6514 understand. */
6515
6516 static bfd_boolean
6517 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6518 struct elf_link_hash_entry *h)
6519 {
6520 struct ppc_link_hash_table *htab;
6521 asection *s;
6522
6523 htab = ppc_hash_table (info);
6524 if (htab == NULL)
6525 return FALSE;
6526
6527 /* Deal with function syms. */
6528 if (h->type == STT_FUNC
6529 || h->type == STT_GNU_IFUNC
6530 || h->needs_plt)
6531 {
6532 /* Clear procedure linkage table information for any symbol that
6533 won't need a .plt entry. */
6534 struct plt_entry *ent;
6535 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6536 if (ent->plt.refcount > 0)
6537 break;
6538 if (ent == NULL
6539 || (h->type != STT_GNU_IFUNC
6540 && (SYMBOL_CALLS_LOCAL (info, h)
6541 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6542 && h->root.type == bfd_link_hash_undefweak))))
6543 {
6544 h->plt.plist = NULL;
6545 h->needs_plt = 0;
6546 }
6547 }
6548 else
6549 h->plt.plist = NULL;
6550
6551 /* If this is a weak symbol, and there is a real definition, the
6552 processor independent code will have arranged for us to see the
6553 real definition first, and we can just use the same value. */
6554 if (h->u.weakdef != NULL)
6555 {
6556 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6557 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6558 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6559 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6560 if (ELIMINATE_COPY_RELOCS)
6561 h->non_got_ref = h->u.weakdef->non_got_ref;
6562 return TRUE;
6563 }
6564
6565 /* If we are creating a shared library, we must presume that the
6566 only references to the symbol are via the global offset table.
6567 For such cases we need not do anything here; the relocations will
6568 be handled correctly by relocate_section. */
6569 if (info->shared)
6570 return TRUE;
6571
6572 /* If there are no references to this symbol that do not use the
6573 GOT, we don't need to generate a copy reloc. */
6574 if (!h->non_got_ref)
6575 return TRUE;
6576
6577 /* Don't generate a copy reloc for symbols defined in the executable. */
6578 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6579 return TRUE;
6580
6581 if (ELIMINATE_COPY_RELOCS)
6582 {
6583 struct ppc_link_hash_entry * eh;
6584 struct elf_dyn_relocs *p;
6585
6586 eh = (struct ppc_link_hash_entry *) h;
6587 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6588 {
6589 s = p->sec->output_section;
6590 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6591 break;
6592 }
6593
6594 /* If we didn't find any dynamic relocs in read-only sections, then
6595 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6596 if (p == NULL)
6597 {
6598 h->non_got_ref = 0;
6599 return TRUE;
6600 }
6601 }
6602
6603 if (h->plt.plist != NULL)
6604 {
6605 /* We should never get here, but unfortunately there are versions
6606 of gcc out there that improperly (for this ABI) put initialized
6607 function pointers, vtable refs and suchlike in read-only
6608 sections. Allow them to proceed, but warn that this might
6609 break at runtime. */
6610 info->callbacks->einfo
6611 (_("%P: copy reloc against `%s' requires lazy plt linking; "
6612 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6613 h->root.root.string);
6614 }
6615
6616 /* This is a reference to a symbol defined by a dynamic object which
6617 is not a function. */
6618
6619 /* We must allocate the symbol in our .dynbss section, which will
6620 become part of the .bss section of the executable. There will be
6621 an entry for this symbol in the .dynsym section. The dynamic
6622 object will contain position independent code, so all references
6623 from the dynamic object to this symbol will go through the global
6624 offset table. The dynamic linker will use the .dynsym entry to
6625 determine the address it must put in the global offset table, so
6626 both the dynamic object and the regular object will refer to the
6627 same memory location for the variable. */
6628
6629 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6630 to copy the initial value out of the dynamic object and into the
6631 runtime process image. We need to remember the offset into the
6632 .rela.bss section we are going to use. */
6633 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6634 {
6635 htab->relbss->size += sizeof (Elf64_External_Rela);
6636 h->needs_copy = 1;
6637 }
6638
6639 s = htab->dynbss;
6640
6641 return _bfd_elf_adjust_dynamic_copy (h, s);
6642 }
6643
6644 /* If given a function descriptor symbol, hide both the function code
6645 sym and the descriptor. */
6646 static void
6647 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6648 struct elf_link_hash_entry *h,
6649 bfd_boolean force_local)
6650 {
6651 struct ppc_link_hash_entry *eh;
6652 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6653
6654 eh = (struct ppc_link_hash_entry *) h;
6655 if (eh->is_func_descriptor)
6656 {
6657 struct ppc_link_hash_entry *fh = eh->oh;
6658
6659 if (fh == NULL)
6660 {
6661 const char *p, *q;
6662 struct ppc_link_hash_table *htab;
6663 char save;
6664
6665 /* We aren't supposed to use alloca in BFD because on
6666 systems which do not have alloca the version in libiberty
6667 calls xmalloc, which might cause the program to crash
6668 when it runs out of memory. This function doesn't have a
6669 return status, so there's no way to gracefully return an
6670 error. So cheat. We know that string[-1] can be safely
6671 accessed; It's either a string in an ELF string table,
6672 or allocated in an objalloc structure. */
6673
6674 p = eh->elf.root.root.string - 1;
6675 save = *p;
6676 *(char *) p = '.';
6677 htab = ppc_hash_table (info);
6678 if (htab == NULL)
6679 return;
6680
6681 fh = (struct ppc_link_hash_entry *)
6682 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6683 *(char *) p = save;
6684
6685 /* Unfortunately, if it so happens that the string we were
6686 looking for was allocated immediately before this string,
6687 then we overwrote the string terminator. That's the only
6688 reason the lookup should fail. */
6689 if (fh == NULL)
6690 {
6691 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6692 while (q >= eh->elf.root.root.string && *q == *p)
6693 --q, --p;
6694 if (q < eh->elf.root.root.string && *p == '.')
6695 fh = (struct ppc_link_hash_entry *)
6696 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6697 }
6698 if (fh != NULL)
6699 {
6700 eh->oh = fh;
6701 fh->oh = eh;
6702 }
6703 }
6704 if (fh != NULL)
6705 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6706 }
6707 }
6708
6709 static bfd_boolean
6710 get_sym_h (struct elf_link_hash_entry **hp,
6711 Elf_Internal_Sym **symp,
6712 asection **symsecp,
6713 unsigned char **tls_maskp,
6714 Elf_Internal_Sym **locsymsp,
6715 unsigned long r_symndx,
6716 bfd *ibfd)
6717 {
6718 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6719
6720 if (r_symndx >= symtab_hdr->sh_info)
6721 {
6722 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6723 struct elf_link_hash_entry *h;
6724
6725 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6726 h = elf_follow_link (h);
6727
6728 if (hp != NULL)
6729 *hp = h;
6730
6731 if (symp != NULL)
6732 *symp = NULL;
6733
6734 if (symsecp != NULL)
6735 {
6736 asection *symsec = NULL;
6737 if (h->root.type == bfd_link_hash_defined
6738 || h->root.type == bfd_link_hash_defweak)
6739 symsec = h->root.u.def.section;
6740 *symsecp = symsec;
6741 }
6742
6743 if (tls_maskp != NULL)
6744 {
6745 struct ppc_link_hash_entry *eh;
6746
6747 eh = (struct ppc_link_hash_entry *) h;
6748 *tls_maskp = &eh->tls_mask;
6749 }
6750 }
6751 else
6752 {
6753 Elf_Internal_Sym *sym;
6754 Elf_Internal_Sym *locsyms = *locsymsp;
6755
6756 if (locsyms == NULL)
6757 {
6758 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6759 if (locsyms == NULL)
6760 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6761 symtab_hdr->sh_info,
6762 0, NULL, NULL, NULL);
6763 if (locsyms == NULL)
6764 return FALSE;
6765 *locsymsp = locsyms;
6766 }
6767 sym = locsyms + r_symndx;
6768
6769 if (hp != NULL)
6770 *hp = NULL;
6771
6772 if (symp != NULL)
6773 *symp = sym;
6774
6775 if (symsecp != NULL)
6776 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6777
6778 if (tls_maskp != NULL)
6779 {
6780 struct got_entry **lgot_ents;
6781 unsigned char *tls_mask;
6782
6783 tls_mask = NULL;
6784 lgot_ents = elf_local_got_ents (ibfd);
6785 if (lgot_ents != NULL)
6786 {
6787 struct plt_entry **local_plt = (struct plt_entry **)
6788 (lgot_ents + symtab_hdr->sh_info);
6789 unsigned char *lgot_masks = (unsigned char *)
6790 (local_plt + symtab_hdr->sh_info);
6791 tls_mask = &lgot_masks[r_symndx];
6792 }
6793 *tls_maskp = tls_mask;
6794 }
6795 }
6796 return TRUE;
6797 }
6798
6799 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6800 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6801 type suitable for optimization, and 1 otherwise. */
6802
6803 static int
6804 get_tls_mask (unsigned char **tls_maskp,
6805 unsigned long *toc_symndx,
6806 bfd_vma *toc_addend,
6807 Elf_Internal_Sym **locsymsp,
6808 const Elf_Internal_Rela *rel,
6809 bfd *ibfd)
6810 {
6811 unsigned long r_symndx;
6812 int next_r;
6813 struct elf_link_hash_entry *h;
6814 Elf_Internal_Sym *sym;
6815 asection *sec;
6816 bfd_vma off;
6817
6818 r_symndx = ELF64_R_SYM (rel->r_info);
6819 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6820 return 0;
6821
6822 if ((*tls_maskp != NULL && **tls_maskp != 0)
6823 || sec == NULL
6824 || ppc64_elf_section_data (sec) == NULL
6825 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6826 return 1;
6827
6828 /* Look inside a TOC section too. */
6829 if (h != NULL)
6830 {
6831 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6832 off = h->root.u.def.value;
6833 }
6834 else
6835 off = sym->st_value;
6836 off += rel->r_addend;
6837 BFD_ASSERT (off % 8 == 0);
6838 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6839 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6840 if (toc_symndx != NULL)
6841 *toc_symndx = r_symndx;
6842 if (toc_addend != NULL)
6843 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6844 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6845 return 0;
6846 if ((h == NULL || is_static_defined (h))
6847 && (next_r == -1 || next_r == -2))
6848 return 1 - next_r;
6849 return 1;
6850 }
6851
6852 /* Find (or create) an entry in the tocsave hash table. */
6853
6854 static struct tocsave_entry *
6855 tocsave_find (struct ppc_link_hash_table *htab,
6856 enum insert_option insert,
6857 Elf_Internal_Sym **local_syms,
6858 const Elf_Internal_Rela *irela,
6859 bfd *ibfd)
6860 {
6861 unsigned long r_indx;
6862 struct elf_link_hash_entry *h;
6863 Elf_Internal_Sym *sym;
6864 struct tocsave_entry ent, *p;
6865 hashval_t hash;
6866 struct tocsave_entry **slot;
6867
6868 r_indx = ELF64_R_SYM (irela->r_info);
6869 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6870 return NULL;
6871 if (ent.sec == NULL || ent.sec->output_section == NULL)
6872 {
6873 (*_bfd_error_handler)
6874 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6875 return NULL;
6876 }
6877
6878 if (h != NULL)
6879 ent.offset = h->root.u.def.value;
6880 else
6881 ent.offset = sym->st_value;
6882 ent.offset += irela->r_addend;
6883
6884 hash = tocsave_htab_hash (&ent);
6885 slot = ((struct tocsave_entry **)
6886 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6887 if (slot == NULL)
6888 return NULL;
6889
6890 if (*slot == NULL)
6891 {
6892 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6893 if (p == NULL)
6894 return NULL;
6895 *p = ent;
6896 *slot = p;
6897 }
6898 return *slot;
6899 }
6900
6901 /* Adjust all global syms defined in opd sections. In gcc generated
6902 code for the old ABI, these will already have been done. */
6903
6904 static bfd_boolean
6905 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6906 {
6907 struct ppc_link_hash_entry *eh;
6908 asection *sym_sec;
6909 struct _opd_sec_data *opd;
6910
6911 if (h->root.type == bfd_link_hash_indirect)
6912 return TRUE;
6913
6914 if (h->root.type != bfd_link_hash_defined
6915 && h->root.type != bfd_link_hash_defweak)
6916 return TRUE;
6917
6918 eh = (struct ppc_link_hash_entry *) h;
6919 if (eh->adjust_done)
6920 return TRUE;
6921
6922 sym_sec = eh->elf.root.u.def.section;
6923 opd = get_opd_info (sym_sec);
6924 if (opd != NULL && opd->adjust != NULL)
6925 {
6926 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6927 if (adjust == -1)
6928 {
6929 /* This entry has been deleted. */
6930 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6931 if (dsec == NULL)
6932 {
6933 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6934 if (discarded_section (dsec))
6935 {
6936 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6937 break;
6938 }
6939 }
6940 eh->elf.root.u.def.value = 0;
6941 eh->elf.root.u.def.section = dsec;
6942 }
6943 else
6944 eh->elf.root.u.def.value += adjust;
6945 eh->adjust_done = 1;
6946 }
6947 return TRUE;
6948 }
6949
6950 /* Handles decrementing dynamic reloc counts for the reloc specified by
6951 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6952 have already been determined. */
6953
6954 static bfd_boolean
6955 dec_dynrel_count (bfd_vma r_info,
6956 asection *sec,
6957 struct bfd_link_info *info,
6958 Elf_Internal_Sym **local_syms,
6959 struct elf_link_hash_entry *h,
6960 asection *sym_sec)
6961 {
6962 enum elf_ppc64_reloc_type r_type;
6963 struct elf_dyn_relocs *p;
6964 struct elf_dyn_relocs **pp;
6965
6966 /* Can this reloc be dynamic? This switch, and later tests here
6967 should be kept in sync with the code in check_relocs. */
6968 r_type = ELF64_R_TYPE (r_info);
6969 switch (r_type)
6970 {
6971 default:
6972 return TRUE;
6973
6974 case R_PPC64_TPREL16:
6975 case R_PPC64_TPREL16_LO:
6976 case R_PPC64_TPREL16_HI:
6977 case R_PPC64_TPREL16_HA:
6978 case R_PPC64_TPREL16_DS:
6979 case R_PPC64_TPREL16_LO_DS:
6980 case R_PPC64_TPREL16_HIGHER:
6981 case R_PPC64_TPREL16_HIGHERA:
6982 case R_PPC64_TPREL16_HIGHEST:
6983 case R_PPC64_TPREL16_HIGHESTA:
6984 if (!info->shared)
6985 return TRUE;
6986
6987 case R_PPC64_TPREL64:
6988 case R_PPC64_DTPMOD64:
6989 case R_PPC64_DTPREL64:
6990 case R_PPC64_ADDR64:
6991 case R_PPC64_REL30:
6992 case R_PPC64_REL32:
6993 case R_PPC64_REL64:
6994 case R_PPC64_ADDR14:
6995 case R_PPC64_ADDR14_BRNTAKEN:
6996 case R_PPC64_ADDR14_BRTAKEN:
6997 case R_PPC64_ADDR16:
6998 case R_PPC64_ADDR16_DS:
6999 case R_PPC64_ADDR16_HA:
7000 case R_PPC64_ADDR16_HI:
7001 case R_PPC64_ADDR16_HIGHER:
7002 case R_PPC64_ADDR16_HIGHERA:
7003 case R_PPC64_ADDR16_HIGHEST:
7004 case R_PPC64_ADDR16_HIGHESTA:
7005 case R_PPC64_ADDR16_LO:
7006 case R_PPC64_ADDR16_LO_DS:
7007 case R_PPC64_ADDR24:
7008 case R_PPC64_ADDR32:
7009 case R_PPC64_UADDR16:
7010 case R_PPC64_UADDR32:
7011 case R_PPC64_UADDR64:
7012 case R_PPC64_TOC:
7013 break;
7014 }
7015
7016 if (local_syms != NULL)
7017 {
7018 unsigned long r_symndx;
7019 Elf_Internal_Sym *sym;
7020 bfd *ibfd = sec->owner;
7021
7022 r_symndx = ELF64_R_SYM (r_info);
7023 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7024 return FALSE;
7025 }
7026
7027 if ((info->shared
7028 && (must_be_dyn_reloc (info, r_type)
7029 || (h != NULL
7030 && (!info->symbolic
7031 || h->root.type == bfd_link_hash_defweak
7032 || !h->def_regular))))
7033 || (ELIMINATE_COPY_RELOCS
7034 && !info->shared
7035 && h != NULL
7036 && (h->root.type == bfd_link_hash_defweak
7037 || !h->def_regular)))
7038 ;
7039 else
7040 return TRUE;
7041
7042 if (h != NULL)
7043 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7044 else
7045 {
7046 if (sym_sec != NULL)
7047 {
7048 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
7049 pp = (struct elf_dyn_relocs **) vpp;
7050 }
7051 else
7052 {
7053 void *vpp = &elf_section_data (sec)->local_dynrel;
7054 pp = (struct elf_dyn_relocs **) vpp;
7055 }
7056
7057 /* elf_gc_sweep may have already removed all dyn relocs associated
7058 with local syms for a given section. Don't report a dynreloc
7059 miscount. */
7060 if (*pp == NULL)
7061 return TRUE;
7062 }
7063
7064 while ((p = *pp) != NULL)
7065 {
7066 if (p->sec == sec)
7067 {
7068 if (!must_be_dyn_reloc (info, r_type))
7069 p->pc_count -= 1;
7070 p->count -= 1;
7071 if (p->count == 0)
7072 *pp = p->next;
7073 return TRUE;
7074 }
7075 pp = &p->next;
7076 }
7077
7078 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7079 sec->owner, sec);
7080 bfd_set_error (bfd_error_bad_value);
7081 return FALSE;
7082 }
7083
7084 /* Remove unused Official Procedure Descriptor entries. Currently we
7085 only remove those associated with functions in discarded link-once
7086 sections, or weakly defined functions that have been overridden. It
7087 would be possible to remove many more entries for statically linked
7088 applications. */
7089
7090 bfd_boolean
7091 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7092 {
7093 bfd *ibfd;
7094 bfd_boolean some_edited = FALSE;
7095 asection *need_pad = NULL;
7096
7097 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7098 {
7099 asection *sec;
7100 Elf_Internal_Rela *relstart, *rel, *relend;
7101 Elf_Internal_Shdr *symtab_hdr;
7102 Elf_Internal_Sym *local_syms;
7103 bfd_vma offset;
7104 struct _opd_sec_data *opd;
7105 bfd_boolean need_edit, add_aux_fields;
7106 bfd_size_type cnt_16b = 0;
7107
7108 if (!is_ppc64_elf (ibfd))
7109 continue;
7110
7111 sec = bfd_get_section_by_name (ibfd, ".opd");
7112 if (sec == NULL || sec->size == 0)
7113 continue;
7114
7115 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7116 continue;
7117
7118 if (sec->output_section == bfd_abs_section_ptr)
7119 continue;
7120
7121 /* Look through the section relocs. */
7122 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7123 continue;
7124
7125 local_syms = NULL;
7126 symtab_hdr = &elf_symtab_hdr (ibfd);
7127
7128 /* Read the relocations. */
7129 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7130 info->keep_memory);
7131 if (relstart == NULL)
7132 return FALSE;
7133
7134 /* First run through the relocs to check they are sane, and to
7135 determine whether we need to edit this opd section. */
7136 need_edit = FALSE;
7137 need_pad = sec;
7138 offset = 0;
7139 relend = relstart + sec->reloc_count;
7140 for (rel = relstart; rel < relend; )
7141 {
7142 enum elf_ppc64_reloc_type r_type;
7143 unsigned long r_symndx;
7144 asection *sym_sec;
7145 struct elf_link_hash_entry *h;
7146 Elf_Internal_Sym *sym;
7147
7148 /* .opd contains a regular array of 16 or 24 byte entries. We're
7149 only interested in the reloc pointing to a function entry
7150 point. */
7151 if (rel->r_offset != offset
7152 || rel + 1 >= relend
7153 || (rel + 1)->r_offset != offset + 8)
7154 {
7155 /* If someone messes with .opd alignment then after a
7156 "ld -r" we might have padding in the middle of .opd.
7157 Also, there's nothing to prevent someone putting
7158 something silly in .opd with the assembler. No .opd
7159 optimization for them! */
7160 broken_opd:
7161 (*_bfd_error_handler)
7162 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7163 need_edit = FALSE;
7164 break;
7165 }
7166
7167 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7168 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7169 {
7170 (*_bfd_error_handler)
7171 (_("%B: unexpected reloc type %u in .opd section"),
7172 ibfd, r_type);
7173 need_edit = FALSE;
7174 break;
7175 }
7176
7177 r_symndx = ELF64_R_SYM (rel->r_info);
7178 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7179 r_symndx, ibfd))
7180 goto error_ret;
7181
7182 if (sym_sec == NULL || sym_sec->owner == NULL)
7183 {
7184 const char *sym_name;
7185 if (h != NULL)
7186 sym_name = h->root.root.string;
7187 else
7188 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7189 sym_sec);
7190
7191 (*_bfd_error_handler)
7192 (_("%B: undefined sym `%s' in .opd section"),
7193 ibfd, sym_name);
7194 need_edit = FALSE;
7195 break;
7196 }
7197
7198 /* opd entries are always for functions defined in the
7199 current input bfd. If the symbol isn't defined in the
7200 input bfd, then we won't be using the function in this
7201 bfd; It must be defined in a linkonce section in another
7202 bfd, or is weak. It's also possible that we are
7203 discarding the function due to a linker script /DISCARD/,
7204 which we test for via the output_section. */
7205 if (sym_sec->owner != ibfd
7206 || sym_sec->output_section == bfd_abs_section_ptr)
7207 need_edit = TRUE;
7208
7209 rel += 2;
7210 if (rel == relend
7211 || (rel + 1 == relend && rel->r_offset == offset + 16))
7212 {
7213 if (sec->size == offset + 24)
7214 {
7215 need_pad = NULL;
7216 break;
7217 }
7218 if (rel == relend && sec->size == offset + 16)
7219 {
7220 cnt_16b++;
7221 break;
7222 }
7223 goto broken_opd;
7224 }
7225
7226 if (rel->r_offset == offset + 24)
7227 offset += 24;
7228 else if (rel->r_offset != offset + 16)
7229 goto broken_opd;
7230 else if (rel + 1 < relend
7231 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7232 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7233 {
7234 offset += 16;
7235 cnt_16b++;
7236 }
7237 else if (rel + 2 < relend
7238 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7239 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7240 {
7241 offset += 24;
7242 rel += 1;
7243 }
7244 else
7245 goto broken_opd;
7246 }
7247
7248 add_aux_fields = non_overlapping && cnt_16b > 0;
7249
7250 if (need_edit || add_aux_fields)
7251 {
7252 Elf_Internal_Rela *write_rel;
7253 Elf_Internal_Shdr *rel_hdr;
7254 bfd_byte *rptr, *wptr;
7255 bfd_byte *new_contents;
7256 bfd_boolean skip;
7257 long opd_ent_size;
7258 bfd_size_type amt;
7259
7260 new_contents = NULL;
7261 amt = sec->size * sizeof (long) / 8;
7262 opd = &ppc64_elf_section_data (sec)->u.opd;
7263 opd->adjust = bfd_zalloc (sec->owner, amt);
7264 if (opd->adjust == NULL)
7265 return FALSE;
7266 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7267
7268 /* This seems a waste of time as input .opd sections are all
7269 zeros as generated by gcc, but I suppose there's no reason
7270 this will always be so. We might start putting something in
7271 the third word of .opd entries. */
7272 if ((sec->flags & SEC_IN_MEMORY) == 0)
7273 {
7274 bfd_byte *loc;
7275 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7276 {
7277 if (loc != NULL)
7278 free (loc);
7279 error_ret:
7280 if (local_syms != NULL
7281 && symtab_hdr->contents != (unsigned char *) local_syms)
7282 free (local_syms);
7283 if (elf_section_data (sec)->relocs != relstart)
7284 free (relstart);
7285 return FALSE;
7286 }
7287 sec->contents = loc;
7288 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7289 }
7290
7291 elf_section_data (sec)->relocs = relstart;
7292
7293 new_contents = sec->contents;
7294 if (add_aux_fields)
7295 {
7296 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7297 if (new_contents == NULL)
7298 return FALSE;
7299 need_pad = FALSE;
7300 }
7301 wptr = new_contents;
7302 rptr = sec->contents;
7303
7304 write_rel = relstart;
7305 skip = FALSE;
7306 offset = 0;
7307 opd_ent_size = 0;
7308 for (rel = relstart; rel < relend; rel++)
7309 {
7310 unsigned long r_symndx;
7311 asection *sym_sec;
7312 struct elf_link_hash_entry *h;
7313 Elf_Internal_Sym *sym;
7314
7315 r_symndx = ELF64_R_SYM (rel->r_info);
7316 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7317 r_symndx, ibfd))
7318 goto error_ret;
7319
7320 if (rel->r_offset == offset)
7321 {
7322 struct ppc_link_hash_entry *fdh = NULL;
7323
7324 /* See if the .opd entry is full 24 byte or
7325 16 byte (with fd_aux entry overlapped with next
7326 fd_func). */
7327 opd_ent_size = 24;
7328 if ((rel + 2 == relend && sec->size == offset + 16)
7329 || (rel + 3 < relend
7330 && rel[2].r_offset == offset + 16
7331 && rel[3].r_offset == offset + 24
7332 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7333 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7334 opd_ent_size = 16;
7335
7336 if (h != NULL
7337 && h->root.root.string[0] == '.')
7338 {
7339 struct ppc_link_hash_table *htab;
7340
7341 htab = ppc_hash_table (info);
7342 if (htab != NULL)
7343 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7344 htab);
7345 if (fdh != NULL
7346 && fdh->elf.root.type != bfd_link_hash_defined
7347 && fdh->elf.root.type != bfd_link_hash_defweak)
7348 fdh = NULL;
7349 }
7350
7351 skip = (sym_sec->owner != ibfd
7352 || sym_sec->output_section == bfd_abs_section_ptr);
7353 if (skip)
7354 {
7355 if (fdh != NULL && sym_sec->owner == ibfd)
7356 {
7357 /* Arrange for the function descriptor sym
7358 to be dropped. */
7359 fdh->elf.root.u.def.value = 0;
7360 fdh->elf.root.u.def.section = sym_sec;
7361 }
7362 opd->adjust[rel->r_offset / 8] = -1;
7363 }
7364 else
7365 {
7366 /* We'll be keeping this opd entry. */
7367
7368 if (fdh != NULL)
7369 {
7370 /* Redefine the function descriptor symbol to
7371 this location in the opd section. It is
7372 necessary to update the value here rather
7373 than using an array of adjustments as we do
7374 for local symbols, because various places
7375 in the generic ELF code use the value
7376 stored in u.def.value. */
7377 fdh->elf.root.u.def.value = wptr - new_contents;
7378 fdh->adjust_done = 1;
7379 }
7380
7381 /* Local syms are a bit tricky. We could
7382 tweak them as they can be cached, but
7383 we'd need to look through the local syms
7384 for the function descriptor sym which we
7385 don't have at the moment. So keep an
7386 array of adjustments. */
7387 opd->adjust[rel->r_offset / 8]
7388 = (wptr - new_contents) - (rptr - sec->contents);
7389
7390 if (wptr != rptr)
7391 memcpy (wptr, rptr, opd_ent_size);
7392 wptr += opd_ent_size;
7393 if (add_aux_fields && opd_ent_size == 16)
7394 {
7395 memset (wptr, '\0', 8);
7396 wptr += 8;
7397 }
7398 }
7399 rptr += opd_ent_size;
7400 offset += opd_ent_size;
7401 }
7402
7403 if (skip)
7404 {
7405 if (!NO_OPD_RELOCS
7406 && !info->relocatable
7407 && !dec_dynrel_count (rel->r_info, sec, info,
7408 NULL, h, sym_sec))
7409 goto error_ret;
7410 }
7411 else
7412 {
7413 /* We need to adjust any reloc offsets to point to the
7414 new opd entries. While we're at it, we may as well
7415 remove redundant relocs. */
7416 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7417 if (write_rel != rel)
7418 memcpy (write_rel, rel, sizeof (*rel));
7419 ++write_rel;
7420 }
7421 }
7422
7423 sec->size = wptr - new_contents;
7424 sec->reloc_count = write_rel - relstart;
7425 if (add_aux_fields)
7426 {
7427 free (sec->contents);
7428 sec->contents = new_contents;
7429 }
7430
7431 /* Fudge the header size too, as this is used later in
7432 elf_bfd_final_link if we are emitting relocs. */
7433 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7434 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7435 some_edited = TRUE;
7436 }
7437 else if (elf_section_data (sec)->relocs != relstart)
7438 free (relstart);
7439
7440 if (local_syms != NULL
7441 && symtab_hdr->contents != (unsigned char *) local_syms)
7442 {
7443 if (!info->keep_memory)
7444 free (local_syms);
7445 else
7446 symtab_hdr->contents = (unsigned char *) local_syms;
7447 }
7448 }
7449
7450 if (some_edited)
7451 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7452
7453 /* If we are doing a final link and the last .opd entry is just 16 byte
7454 long, add a 8 byte padding after it. */
7455 if (need_pad != NULL && !info->relocatable)
7456 {
7457 bfd_byte *p;
7458
7459 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7460 {
7461 BFD_ASSERT (need_pad->size > 0);
7462
7463 p = bfd_malloc (need_pad->size + 8);
7464 if (p == NULL)
7465 return FALSE;
7466
7467 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7468 p, 0, need_pad->size))
7469 return FALSE;
7470
7471 need_pad->contents = p;
7472 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7473 }
7474 else
7475 {
7476 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7477 if (p == NULL)
7478 return FALSE;
7479
7480 need_pad->contents = p;
7481 }
7482
7483 memset (need_pad->contents + need_pad->size, 0, 8);
7484 need_pad->size += 8;
7485 }
7486
7487 return TRUE;
7488 }
7489
7490 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7491
7492 asection *
7493 ppc64_elf_tls_setup (struct bfd_link_info *info,
7494 int no_tls_get_addr_opt,
7495 int *no_multi_toc)
7496 {
7497 struct ppc_link_hash_table *htab;
7498
7499 htab = ppc_hash_table (info);
7500 if (htab == NULL)
7501 return NULL;
7502
7503 if (*no_multi_toc)
7504 htab->do_multi_toc = 0;
7505 else if (!htab->do_multi_toc)
7506 *no_multi_toc = 1;
7507
7508 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7509 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7510 FALSE, FALSE, TRUE));
7511 /* Move dynamic linking info to the function descriptor sym. */
7512 if (htab->tls_get_addr != NULL)
7513 func_desc_adjust (&htab->tls_get_addr->elf, info);
7514 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7515 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7516 FALSE, FALSE, TRUE));
7517 if (!no_tls_get_addr_opt)
7518 {
7519 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7520
7521 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7522 FALSE, FALSE, TRUE);
7523 if (opt != NULL)
7524 func_desc_adjust (opt, info);
7525 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7526 FALSE, FALSE, TRUE);
7527 if (opt_fd != NULL
7528 && (opt_fd->root.type == bfd_link_hash_defined
7529 || opt_fd->root.type == bfd_link_hash_defweak))
7530 {
7531 /* If glibc supports an optimized __tls_get_addr call stub,
7532 signalled by the presence of __tls_get_addr_opt, and we'll
7533 be calling __tls_get_addr via a plt call stub, then
7534 make __tls_get_addr point to __tls_get_addr_opt. */
7535 tga_fd = &htab->tls_get_addr_fd->elf;
7536 if (htab->elf.dynamic_sections_created
7537 && tga_fd != NULL
7538 && (tga_fd->type == STT_FUNC
7539 || tga_fd->needs_plt)
7540 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7541 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7542 && tga_fd->root.type == bfd_link_hash_undefweak)))
7543 {
7544 struct plt_entry *ent;
7545
7546 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7547 if (ent->plt.refcount > 0)
7548 break;
7549 if (ent != NULL)
7550 {
7551 tga_fd->root.type = bfd_link_hash_indirect;
7552 tga_fd->root.u.i.link = &opt_fd->root;
7553 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7554 if (opt_fd->dynindx != -1)
7555 {
7556 /* Use __tls_get_addr_opt in dynamic relocations. */
7557 opt_fd->dynindx = -1;
7558 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7559 opt_fd->dynstr_index);
7560 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7561 return NULL;
7562 }
7563 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7564 tga = &htab->tls_get_addr->elf;
7565 if (opt != NULL && tga != NULL)
7566 {
7567 tga->root.type = bfd_link_hash_indirect;
7568 tga->root.u.i.link = &opt->root;
7569 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7570 _bfd_elf_link_hash_hide_symbol (info, opt,
7571 tga->forced_local);
7572 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7573 }
7574 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7575 htab->tls_get_addr_fd->is_func_descriptor = 1;
7576 if (htab->tls_get_addr != NULL)
7577 {
7578 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7579 htab->tls_get_addr->is_func = 1;
7580 }
7581 }
7582 }
7583 }
7584 else
7585 no_tls_get_addr_opt = TRUE;
7586 }
7587 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7588 return _bfd_elf_tls_setup (info->output_bfd, info);
7589 }
7590
7591 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7592 HASH1 or HASH2. */
7593
7594 static bfd_boolean
7595 branch_reloc_hash_match (const bfd *ibfd,
7596 const Elf_Internal_Rela *rel,
7597 const struct ppc_link_hash_entry *hash1,
7598 const struct ppc_link_hash_entry *hash2)
7599 {
7600 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7601 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7602 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7603
7604 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7605 {
7606 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7607 struct elf_link_hash_entry *h;
7608
7609 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7610 h = elf_follow_link (h);
7611 if (h == &hash1->elf || h == &hash2->elf)
7612 return TRUE;
7613 }
7614 return FALSE;
7615 }
7616
7617 /* Run through all the TLS relocs looking for optimization
7618 opportunities. The linker has been hacked (see ppc64elf.em) to do
7619 a preliminary section layout so that we know the TLS segment
7620 offsets. We can't optimize earlier because some optimizations need
7621 to know the tp offset, and we need to optimize before allocating
7622 dynamic relocations. */
7623
7624 bfd_boolean
7625 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7626 {
7627 bfd *ibfd;
7628 asection *sec;
7629 struct ppc_link_hash_table *htab;
7630 unsigned char *toc_ref;
7631 int pass;
7632
7633 if (info->relocatable || !info->executable)
7634 return TRUE;
7635
7636 htab = ppc_hash_table (info);
7637 if (htab == NULL)
7638 return FALSE;
7639
7640 /* Make two passes over the relocs. On the first pass, mark toc
7641 entries involved with tls relocs, and check that tls relocs
7642 involved in setting up a tls_get_addr call are indeed followed by
7643 such a call. If they are not, we can't do any tls optimization.
7644 On the second pass twiddle tls_mask flags to notify
7645 relocate_section that optimization can be done, and adjust got
7646 and plt refcounts. */
7647 toc_ref = NULL;
7648 for (pass = 0; pass < 2; ++pass)
7649 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7650 {
7651 Elf_Internal_Sym *locsyms = NULL;
7652 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7653
7654 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7655 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7656 {
7657 Elf_Internal_Rela *relstart, *rel, *relend;
7658 bfd_boolean found_tls_get_addr_arg = 0;
7659
7660 /* Read the relocations. */
7661 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7662 info->keep_memory);
7663 if (relstart == NULL)
7664 return FALSE;
7665
7666 relend = relstart + sec->reloc_count;
7667 for (rel = relstart; rel < relend; rel++)
7668 {
7669 enum elf_ppc64_reloc_type r_type;
7670 unsigned long r_symndx;
7671 struct elf_link_hash_entry *h;
7672 Elf_Internal_Sym *sym;
7673 asection *sym_sec;
7674 unsigned char *tls_mask;
7675 unsigned char tls_set, tls_clear, tls_type = 0;
7676 bfd_vma value;
7677 bfd_boolean ok_tprel, is_local;
7678 long toc_ref_index = 0;
7679 int expecting_tls_get_addr = 0;
7680 bfd_boolean ret = FALSE;
7681
7682 r_symndx = ELF64_R_SYM (rel->r_info);
7683 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7684 r_symndx, ibfd))
7685 {
7686 err_free_rel:
7687 if (elf_section_data (sec)->relocs != relstart)
7688 free (relstart);
7689 if (toc_ref != NULL)
7690 free (toc_ref);
7691 if (locsyms != NULL
7692 && (elf_symtab_hdr (ibfd).contents
7693 != (unsigned char *) locsyms))
7694 free (locsyms);
7695 return ret;
7696 }
7697
7698 if (h != NULL)
7699 {
7700 if (h->root.type == bfd_link_hash_defined
7701 || h->root.type == bfd_link_hash_defweak)
7702 value = h->root.u.def.value;
7703 else if (h->root.type == bfd_link_hash_undefweak)
7704 value = 0;
7705 else
7706 {
7707 found_tls_get_addr_arg = 0;
7708 continue;
7709 }
7710 }
7711 else
7712 /* Symbols referenced by TLS relocs must be of type
7713 STT_TLS. So no need for .opd local sym adjust. */
7714 value = sym->st_value;
7715
7716 ok_tprel = FALSE;
7717 is_local = FALSE;
7718 if (h == NULL
7719 || !h->def_dynamic)
7720 {
7721 is_local = TRUE;
7722 if (h != NULL
7723 && h->root.type == bfd_link_hash_undefweak)
7724 ok_tprel = TRUE;
7725 else
7726 {
7727 value += sym_sec->output_offset;
7728 value += sym_sec->output_section->vma;
7729 value -= htab->elf.tls_sec->vma;
7730 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7731 < (bfd_vma) 1 << 32);
7732 }
7733 }
7734
7735 r_type = ELF64_R_TYPE (rel->r_info);
7736 /* If this section has old-style __tls_get_addr calls
7737 without marker relocs, then check that each
7738 __tls_get_addr call reloc is preceded by a reloc
7739 that conceivably belongs to the __tls_get_addr arg
7740 setup insn. If we don't find matching arg setup
7741 relocs, don't do any tls optimization. */
7742 if (pass == 0
7743 && sec->has_tls_get_addr_call
7744 && h != NULL
7745 && (h == &htab->tls_get_addr->elf
7746 || h == &htab->tls_get_addr_fd->elf)
7747 && !found_tls_get_addr_arg
7748 && is_branch_reloc (r_type))
7749 {
7750 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7751 "TLS optimization disabled\n"),
7752 ibfd, sec, rel->r_offset);
7753 ret = TRUE;
7754 goto err_free_rel;
7755 }
7756
7757 found_tls_get_addr_arg = 0;
7758 switch (r_type)
7759 {
7760 case R_PPC64_GOT_TLSLD16:
7761 case R_PPC64_GOT_TLSLD16_LO:
7762 expecting_tls_get_addr = 1;
7763 found_tls_get_addr_arg = 1;
7764 /* Fall thru */
7765
7766 case R_PPC64_GOT_TLSLD16_HI:
7767 case R_PPC64_GOT_TLSLD16_HA:
7768 /* These relocs should never be against a symbol
7769 defined in a shared lib. Leave them alone if
7770 that turns out to be the case. */
7771 if (!is_local)
7772 continue;
7773
7774 /* LD -> LE */
7775 tls_set = 0;
7776 tls_clear = TLS_LD;
7777 tls_type = TLS_TLS | TLS_LD;
7778 break;
7779
7780 case R_PPC64_GOT_TLSGD16:
7781 case R_PPC64_GOT_TLSGD16_LO:
7782 expecting_tls_get_addr = 1;
7783 found_tls_get_addr_arg = 1;
7784 /* Fall thru */
7785
7786 case R_PPC64_GOT_TLSGD16_HI:
7787 case R_PPC64_GOT_TLSGD16_HA:
7788 if (ok_tprel)
7789 /* GD -> LE */
7790 tls_set = 0;
7791 else
7792 /* GD -> IE */
7793 tls_set = TLS_TLS | TLS_TPRELGD;
7794 tls_clear = TLS_GD;
7795 tls_type = TLS_TLS | TLS_GD;
7796 break;
7797
7798 case R_PPC64_GOT_TPREL16_DS:
7799 case R_PPC64_GOT_TPREL16_LO_DS:
7800 case R_PPC64_GOT_TPREL16_HI:
7801 case R_PPC64_GOT_TPREL16_HA:
7802 if (ok_tprel)
7803 {
7804 /* IE -> LE */
7805 tls_set = 0;
7806 tls_clear = TLS_TPREL;
7807 tls_type = TLS_TLS | TLS_TPREL;
7808 break;
7809 }
7810 continue;
7811
7812 case R_PPC64_TLSGD:
7813 case R_PPC64_TLSLD:
7814 found_tls_get_addr_arg = 1;
7815 /* Fall thru */
7816
7817 case R_PPC64_TLS:
7818 case R_PPC64_TOC16:
7819 case R_PPC64_TOC16_LO:
7820 if (sym_sec == NULL || sym_sec != toc)
7821 continue;
7822
7823 /* Mark this toc entry as referenced by a TLS
7824 code sequence. We can do that now in the
7825 case of R_PPC64_TLS, and after checking for
7826 tls_get_addr for the TOC16 relocs. */
7827 if (toc_ref == NULL)
7828 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7829 if (toc_ref == NULL)
7830 goto err_free_rel;
7831
7832 if (h != NULL)
7833 value = h->root.u.def.value;
7834 else
7835 value = sym->st_value;
7836 value += rel->r_addend;
7837 BFD_ASSERT (value < toc->size && value % 8 == 0);
7838 toc_ref_index = (value + toc->output_offset) / 8;
7839 if (r_type == R_PPC64_TLS
7840 || r_type == R_PPC64_TLSGD
7841 || r_type == R_PPC64_TLSLD)
7842 {
7843 toc_ref[toc_ref_index] = 1;
7844 continue;
7845 }
7846
7847 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7848 continue;
7849
7850 tls_set = 0;
7851 tls_clear = 0;
7852 expecting_tls_get_addr = 2;
7853 break;
7854
7855 case R_PPC64_TPREL64:
7856 if (pass == 0
7857 || sec != toc
7858 || toc_ref == NULL
7859 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7860 continue;
7861 if (ok_tprel)
7862 {
7863 /* IE -> LE */
7864 tls_set = TLS_EXPLICIT;
7865 tls_clear = TLS_TPREL;
7866 break;
7867 }
7868 continue;
7869
7870 case R_PPC64_DTPMOD64:
7871 if (pass == 0
7872 || sec != toc
7873 || toc_ref == NULL
7874 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7875 continue;
7876 if (rel + 1 < relend
7877 && (rel[1].r_info
7878 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7879 && rel[1].r_offset == rel->r_offset + 8)
7880 {
7881 if (ok_tprel)
7882 /* GD -> LE */
7883 tls_set = TLS_EXPLICIT | TLS_GD;
7884 else
7885 /* GD -> IE */
7886 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7887 tls_clear = TLS_GD;
7888 }
7889 else
7890 {
7891 if (!is_local)
7892 continue;
7893
7894 /* LD -> LE */
7895 tls_set = TLS_EXPLICIT;
7896 tls_clear = TLS_LD;
7897 }
7898 break;
7899
7900 default:
7901 continue;
7902 }
7903
7904 if (pass == 0)
7905 {
7906 if (!expecting_tls_get_addr
7907 || !sec->has_tls_get_addr_call)
7908 continue;
7909
7910 if (rel + 1 < relend
7911 && branch_reloc_hash_match (ibfd, rel + 1,
7912 htab->tls_get_addr,
7913 htab->tls_get_addr_fd))
7914 {
7915 if (expecting_tls_get_addr == 2)
7916 {
7917 /* Check for toc tls entries. */
7918 unsigned char *toc_tls;
7919 int retval;
7920
7921 retval = get_tls_mask (&toc_tls, NULL, NULL,
7922 &locsyms,
7923 rel, ibfd);
7924 if (retval == 0)
7925 goto err_free_rel;
7926 if (toc_tls != NULL)
7927 {
7928 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7929 found_tls_get_addr_arg = 1;
7930 if (retval > 1)
7931 toc_ref[toc_ref_index] = 1;
7932 }
7933 }
7934 continue;
7935 }
7936
7937 if (expecting_tls_get_addr != 1)
7938 continue;
7939
7940 /* Uh oh, we didn't find the expected call. We
7941 could just mark this symbol to exclude it
7942 from tls optimization but it's safer to skip
7943 the entire optimization. */
7944 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7945 "TLS optimization disabled\n"),
7946 ibfd, sec, rel->r_offset);
7947 ret = TRUE;
7948 goto err_free_rel;
7949 }
7950
7951 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7952 {
7953 struct plt_entry *ent;
7954 for (ent = htab->tls_get_addr->elf.plt.plist;
7955 ent != NULL;
7956 ent = ent->next)
7957 if (ent->addend == 0)
7958 {
7959 if (ent->plt.refcount > 0)
7960 {
7961 ent->plt.refcount -= 1;
7962 expecting_tls_get_addr = 0;
7963 }
7964 break;
7965 }
7966 }
7967
7968 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7969 {
7970 struct plt_entry *ent;
7971 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7972 ent != NULL;
7973 ent = ent->next)
7974 if (ent->addend == 0)
7975 {
7976 if (ent->plt.refcount > 0)
7977 ent->plt.refcount -= 1;
7978 break;
7979 }
7980 }
7981
7982 if (tls_clear == 0)
7983 continue;
7984
7985 if ((tls_set & TLS_EXPLICIT) == 0)
7986 {
7987 struct got_entry *ent;
7988
7989 /* Adjust got entry for this reloc. */
7990 if (h != NULL)
7991 ent = h->got.glist;
7992 else
7993 ent = elf_local_got_ents (ibfd)[r_symndx];
7994
7995 for (; ent != NULL; ent = ent->next)
7996 if (ent->addend == rel->r_addend
7997 && ent->owner == ibfd
7998 && ent->tls_type == tls_type)
7999 break;
8000 if (ent == NULL)
8001 abort ();
8002
8003 if (tls_set == 0)
8004 {
8005 /* We managed to get rid of a got entry. */
8006 if (ent->got.refcount > 0)
8007 ent->got.refcount -= 1;
8008 }
8009 }
8010 else
8011 {
8012 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8013 we'll lose one or two dyn relocs. */
8014 if (!dec_dynrel_count (rel->r_info, sec, info,
8015 NULL, h, sym_sec))
8016 return FALSE;
8017
8018 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8019 {
8020 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8021 NULL, h, sym_sec))
8022 return FALSE;
8023 }
8024 }
8025
8026 *tls_mask |= tls_set;
8027 *tls_mask &= ~tls_clear;
8028 }
8029
8030 if (elf_section_data (sec)->relocs != relstart)
8031 free (relstart);
8032 }
8033
8034 if (locsyms != NULL
8035 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8036 {
8037 if (!info->keep_memory)
8038 free (locsyms);
8039 else
8040 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8041 }
8042 }
8043
8044 if (toc_ref != NULL)
8045 free (toc_ref);
8046 return TRUE;
8047 }
8048
8049 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8050 the values of any global symbols in a toc section that has been
8051 edited. Globals in toc sections should be a rarity, so this function
8052 sets a flag if any are found in toc sections other than the one just
8053 edited, so that futher hash table traversals can be avoided. */
8054
8055 struct adjust_toc_info
8056 {
8057 asection *toc;
8058 unsigned long *skip;
8059 bfd_boolean global_toc_syms;
8060 };
8061
8062 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8063
8064 static bfd_boolean
8065 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8066 {
8067 struct ppc_link_hash_entry *eh;
8068 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8069 unsigned long i;
8070
8071 if (h->root.type != bfd_link_hash_defined
8072 && h->root.type != bfd_link_hash_defweak)
8073 return TRUE;
8074
8075 eh = (struct ppc_link_hash_entry *) h;
8076 if (eh->adjust_done)
8077 return TRUE;
8078
8079 if (eh->elf.root.u.def.section == toc_inf->toc)
8080 {
8081 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8082 i = toc_inf->toc->rawsize >> 3;
8083 else
8084 i = eh->elf.root.u.def.value >> 3;
8085
8086 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8087 {
8088 (*_bfd_error_handler)
8089 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8090 do
8091 ++i;
8092 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8093 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8094 }
8095
8096 eh->elf.root.u.def.value -= toc_inf->skip[i];
8097 eh->adjust_done = 1;
8098 }
8099 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8100 toc_inf->global_toc_syms = TRUE;
8101
8102 return TRUE;
8103 }
8104
8105 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8106
8107 static bfd_boolean
8108 ok_lo_toc_insn (unsigned int insn)
8109 {
8110 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8111 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8112 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8113 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8114 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8115 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8116 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8117 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8118 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8119 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8120 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8121 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8122 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8123 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8124 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8125 && (insn & 3) != 1)
8126 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8127 && ((insn & 3) == 0 || (insn & 3) == 3))
8128 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8129 }
8130
8131 /* Examine all relocs referencing .toc sections in order to remove
8132 unused .toc entries. */
8133
8134 bfd_boolean
8135 ppc64_elf_edit_toc (struct bfd_link_info *info)
8136 {
8137 bfd *ibfd;
8138 struct adjust_toc_info toc_inf;
8139 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8140
8141 htab->do_toc_opt = 1;
8142 toc_inf.global_toc_syms = TRUE;
8143 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8144 {
8145 asection *toc, *sec;
8146 Elf_Internal_Shdr *symtab_hdr;
8147 Elf_Internal_Sym *local_syms;
8148 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8149 unsigned long *skip, *drop;
8150 unsigned char *used;
8151 unsigned char *keep, last, some_unused;
8152
8153 if (!is_ppc64_elf (ibfd))
8154 continue;
8155
8156 toc = bfd_get_section_by_name (ibfd, ".toc");
8157 if (toc == NULL
8158 || toc->size == 0
8159 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8160 || discarded_section (toc))
8161 continue;
8162
8163 toc_relocs = NULL;
8164 local_syms = NULL;
8165 symtab_hdr = &elf_symtab_hdr (ibfd);
8166
8167 /* Look at sections dropped from the final link. */
8168 skip = NULL;
8169 relstart = NULL;
8170 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8171 {
8172 if (sec->reloc_count == 0
8173 || !discarded_section (sec)
8174 || get_opd_info (sec)
8175 || (sec->flags & SEC_ALLOC) == 0
8176 || (sec->flags & SEC_DEBUGGING) != 0)
8177 continue;
8178
8179 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8180 if (relstart == NULL)
8181 goto error_ret;
8182
8183 /* Run through the relocs to see which toc entries might be
8184 unused. */
8185 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8186 {
8187 enum elf_ppc64_reloc_type r_type;
8188 unsigned long r_symndx;
8189 asection *sym_sec;
8190 struct elf_link_hash_entry *h;
8191 Elf_Internal_Sym *sym;
8192 bfd_vma val;
8193
8194 r_type = ELF64_R_TYPE (rel->r_info);
8195 switch (r_type)
8196 {
8197 default:
8198 continue;
8199
8200 case R_PPC64_TOC16:
8201 case R_PPC64_TOC16_LO:
8202 case R_PPC64_TOC16_HI:
8203 case R_PPC64_TOC16_HA:
8204 case R_PPC64_TOC16_DS:
8205 case R_PPC64_TOC16_LO_DS:
8206 break;
8207 }
8208
8209 r_symndx = ELF64_R_SYM (rel->r_info);
8210 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8211 r_symndx, ibfd))
8212 goto error_ret;
8213
8214 if (sym_sec != toc)
8215 continue;
8216
8217 if (h != NULL)
8218 val = h->root.u.def.value;
8219 else
8220 val = sym->st_value;
8221 val += rel->r_addend;
8222
8223 if (val >= toc->size)
8224 continue;
8225
8226 /* Anything in the toc ought to be aligned to 8 bytes.
8227 If not, don't mark as unused. */
8228 if (val & 7)
8229 continue;
8230
8231 if (skip == NULL)
8232 {
8233 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8234 if (skip == NULL)
8235 goto error_ret;
8236 }
8237
8238 skip[val >> 3] = ref_from_discarded;
8239 }
8240
8241 if (elf_section_data (sec)->relocs != relstart)
8242 free (relstart);
8243 }
8244
8245 /* For largetoc loads of address constants, we can convert
8246 . addis rx,2,addr@got@ha
8247 . ld ry,addr@got@l(rx)
8248 to
8249 . addis rx,2,addr@toc@ha
8250 . addi ry,rx,addr@toc@l
8251 when addr is within 2G of the toc pointer. This then means
8252 that the word storing "addr" in the toc is no longer needed. */
8253
8254 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8255 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8256 && toc->reloc_count != 0)
8257 {
8258 /* Read toc relocs. */
8259 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8260 info->keep_memory);
8261 if (toc_relocs == NULL)
8262 goto error_ret;
8263
8264 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8265 {
8266 enum elf_ppc64_reloc_type r_type;
8267 unsigned long r_symndx;
8268 asection *sym_sec;
8269 struct elf_link_hash_entry *h;
8270 Elf_Internal_Sym *sym;
8271 bfd_vma val, addr;
8272
8273 r_type = ELF64_R_TYPE (rel->r_info);
8274 if (r_type != R_PPC64_ADDR64)
8275 continue;
8276
8277 r_symndx = ELF64_R_SYM (rel->r_info);
8278 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8279 r_symndx, ibfd))
8280 goto error_ret;
8281
8282 if (sym_sec == NULL
8283 || discarded_section (sym_sec))
8284 continue;
8285
8286 if (!SYMBOL_CALLS_LOCAL (info, h))
8287 continue;
8288
8289 if (h != NULL)
8290 {
8291 if (h->type == STT_GNU_IFUNC)
8292 continue;
8293 val = h->root.u.def.value;
8294 }
8295 else
8296 {
8297 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8298 continue;
8299 val = sym->st_value;
8300 }
8301 val += rel->r_addend;
8302 val += sym_sec->output_section->vma + sym_sec->output_offset;
8303
8304 /* We don't yet know the exact toc pointer value, but we
8305 know it will be somewhere in the toc section. Don't
8306 optimize if the difference from any possible toc
8307 pointer is outside [ff..f80008000, 7fff7fff]. */
8308 addr = toc->output_section->vma + TOC_BASE_OFF;
8309 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8310 continue;
8311
8312 addr = toc->output_section->vma + toc->output_section->rawsize;
8313 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8314 continue;
8315
8316 if (skip == NULL)
8317 {
8318 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8319 if (skip == NULL)
8320 goto error_ret;
8321 }
8322
8323 skip[rel->r_offset >> 3]
8324 |= can_optimize | ((rel - toc_relocs) << 2);
8325 }
8326 }
8327
8328 if (skip == NULL)
8329 continue;
8330
8331 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8332 if (used == NULL)
8333 {
8334 error_ret:
8335 if (local_syms != NULL
8336 && symtab_hdr->contents != (unsigned char *) local_syms)
8337 free (local_syms);
8338 if (sec != NULL
8339 && relstart != NULL
8340 && elf_section_data (sec)->relocs != relstart)
8341 free (relstart);
8342 if (toc_relocs != NULL
8343 && elf_section_data (toc)->relocs != toc_relocs)
8344 free (toc_relocs);
8345 if (skip != NULL)
8346 free (skip);
8347 return FALSE;
8348 }
8349
8350 /* Now check all kept sections that might reference the toc.
8351 Check the toc itself last. */
8352 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8353 : ibfd->sections);
8354 sec != NULL;
8355 sec = (sec == toc ? NULL
8356 : sec->next == NULL ? toc
8357 : sec->next == toc && toc->next ? toc->next
8358 : sec->next))
8359 {
8360 int repeat;
8361
8362 if (sec->reloc_count == 0
8363 || discarded_section (sec)
8364 || get_opd_info (sec)
8365 || (sec->flags & SEC_ALLOC) == 0
8366 || (sec->flags & SEC_DEBUGGING) != 0)
8367 continue;
8368
8369 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8370 info->keep_memory);
8371 if (relstart == NULL)
8372 goto error_ret;
8373
8374 /* Mark toc entries referenced as used. */
8375 repeat = 0;
8376 do
8377 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8378 {
8379 enum elf_ppc64_reloc_type r_type;
8380 unsigned long r_symndx;
8381 asection *sym_sec;
8382 struct elf_link_hash_entry *h;
8383 Elf_Internal_Sym *sym;
8384 bfd_vma val;
8385 enum {no_check, check_lo, check_ha} insn_check;
8386
8387 r_type = ELF64_R_TYPE (rel->r_info);
8388 switch (r_type)
8389 {
8390 default:
8391 insn_check = no_check;
8392 break;
8393
8394 case R_PPC64_GOT_TLSLD16_HA:
8395 case R_PPC64_GOT_TLSGD16_HA:
8396 case R_PPC64_GOT_TPREL16_HA:
8397 case R_PPC64_GOT_DTPREL16_HA:
8398 case R_PPC64_GOT16_HA:
8399 case R_PPC64_TOC16_HA:
8400 insn_check = check_ha;
8401 break;
8402
8403 case R_PPC64_GOT_TLSLD16_LO:
8404 case R_PPC64_GOT_TLSGD16_LO:
8405 case R_PPC64_GOT_TPREL16_LO_DS:
8406 case R_PPC64_GOT_DTPREL16_LO_DS:
8407 case R_PPC64_GOT16_LO:
8408 case R_PPC64_GOT16_LO_DS:
8409 case R_PPC64_TOC16_LO:
8410 case R_PPC64_TOC16_LO_DS:
8411 insn_check = check_lo;
8412 break;
8413 }
8414
8415 if (insn_check != no_check)
8416 {
8417 bfd_vma off = rel->r_offset & ~3;
8418 unsigned char buf[4];
8419 unsigned int insn;
8420
8421 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8422 {
8423 free (used);
8424 goto error_ret;
8425 }
8426 insn = bfd_get_32 (ibfd, buf);
8427 if (insn_check == check_lo
8428 ? !ok_lo_toc_insn (insn)
8429 : ((insn & ((0x3f << 26) | 0x1f << 16))
8430 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8431 {
8432 char str[12];
8433
8434 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8435 sprintf (str, "%#08x", insn);
8436 info->callbacks->einfo
8437 (_("%P: %H: toc optimization is not supported for"
8438 " %s instruction.\n"),
8439 ibfd, sec, rel->r_offset & ~3, str);
8440 }
8441 }
8442
8443 switch (r_type)
8444 {
8445 case R_PPC64_TOC16:
8446 case R_PPC64_TOC16_LO:
8447 case R_PPC64_TOC16_HI:
8448 case R_PPC64_TOC16_HA:
8449 case R_PPC64_TOC16_DS:
8450 case R_PPC64_TOC16_LO_DS:
8451 /* In case we're taking addresses of toc entries. */
8452 case R_PPC64_ADDR64:
8453 break;
8454
8455 default:
8456 continue;
8457 }
8458
8459 r_symndx = ELF64_R_SYM (rel->r_info);
8460 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8461 r_symndx, ibfd))
8462 {
8463 free (used);
8464 goto error_ret;
8465 }
8466
8467 if (sym_sec != toc)
8468 continue;
8469
8470 if (h != NULL)
8471 val = h->root.u.def.value;
8472 else
8473 val = sym->st_value;
8474 val += rel->r_addend;
8475
8476 if (val >= toc->size)
8477 continue;
8478
8479 if ((skip[val >> 3] & can_optimize) != 0)
8480 {
8481 bfd_vma off;
8482 unsigned char opc;
8483
8484 switch (r_type)
8485 {
8486 case R_PPC64_TOC16_HA:
8487 break;
8488
8489 case R_PPC64_TOC16_LO_DS:
8490 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8491 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8492 {
8493 free (used);
8494 goto error_ret;
8495 }
8496 if ((opc & (0x3f << 2)) == (58u << 2))
8497 break;
8498 /* Fall thru */
8499
8500 default:
8501 /* Wrong sort of reloc, or not a ld. We may
8502 as well clear ref_from_discarded too. */
8503 skip[val >> 3] = 0;
8504 }
8505 }
8506
8507 /* For the toc section, we only mark as used if
8508 this entry itself isn't unused. */
8509 if (sec == toc
8510 && !used[val >> 3]
8511 && (used[rel->r_offset >> 3]
8512 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8513 /* Do all the relocs again, to catch reference
8514 chains. */
8515 repeat = 1;
8516
8517 used[val >> 3] = 1;
8518 }
8519 while (repeat);
8520
8521 if (elf_section_data (sec)->relocs != relstart)
8522 free (relstart);
8523 }
8524
8525 /* Merge the used and skip arrays. Assume that TOC
8526 doublewords not appearing as either used or unused belong
8527 to to an entry more than one doubleword in size. */
8528 for (drop = skip, keep = used, last = 0, some_unused = 0;
8529 drop < skip + (toc->size + 7) / 8;
8530 ++drop, ++keep)
8531 {
8532 if (*keep)
8533 {
8534 *drop &= ~ref_from_discarded;
8535 if ((*drop & can_optimize) != 0)
8536 some_unused = 1;
8537 last = 0;
8538 }
8539 else if ((*drop & ref_from_discarded) != 0)
8540 {
8541 some_unused = 1;
8542 last = ref_from_discarded;
8543 }
8544 else
8545 *drop = last;
8546 }
8547
8548 free (used);
8549
8550 if (some_unused)
8551 {
8552 bfd_byte *contents, *src;
8553 unsigned long off;
8554 Elf_Internal_Sym *sym;
8555 bfd_boolean local_toc_syms = FALSE;
8556
8557 /* Shuffle the toc contents, and at the same time convert the
8558 skip array from booleans into offsets. */
8559 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8560 goto error_ret;
8561
8562 elf_section_data (toc)->this_hdr.contents = contents;
8563
8564 for (src = contents, off = 0, drop = skip;
8565 src < contents + toc->size;
8566 src += 8, ++drop)
8567 {
8568 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8569 off += 8;
8570 else if (off != 0)
8571 {
8572 *drop = off;
8573 memcpy (src - off, src, 8);
8574 }
8575 }
8576 *drop = off;
8577 toc->rawsize = toc->size;
8578 toc->size = src - contents - off;
8579
8580 /* Adjust addends for relocs against the toc section sym,
8581 and optimize any accesses we can. */
8582 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8583 {
8584 if (sec->reloc_count == 0
8585 || discarded_section (sec))
8586 continue;
8587
8588 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8589 info->keep_memory);
8590 if (relstart == NULL)
8591 goto error_ret;
8592
8593 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8594 {
8595 enum elf_ppc64_reloc_type r_type;
8596 unsigned long r_symndx;
8597 asection *sym_sec;
8598 struct elf_link_hash_entry *h;
8599 bfd_vma val;
8600
8601 r_type = ELF64_R_TYPE (rel->r_info);
8602 switch (r_type)
8603 {
8604 default:
8605 continue;
8606
8607 case R_PPC64_TOC16:
8608 case R_PPC64_TOC16_LO:
8609 case R_PPC64_TOC16_HI:
8610 case R_PPC64_TOC16_HA:
8611 case R_PPC64_TOC16_DS:
8612 case R_PPC64_TOC16_LO_DS:
8613 case R_PPC64_ADDR64:
8614 break;
8615 }
8616
8617 r_symndx = ELF64_R_SYM (rel->r_info);
8618 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8619 r_symndx, ibfd))
8620 goto error_ret;
8621
8622 if (sym_sec != toc)
8623 continue;
8624
8625 if (h != NULL)
8626 val = h->root.u.def.value;
8627 else
8628 {
8629 val = sym->st_value;
8630 if (val != 0)
8631 local_toc_syms = TRUE;
8632 }
8633
8634 val += rel->r_addend;
8635
8636 if (val > toc->rawsize)
8637 val = toc->rawsize;
8638 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8639 continue;
8640 else if ((skip[val >> 3] & can_optimize) != 0)
8641 {
8642 Elf_Internal_Rela *tocrel
8643 = toc_relocs + (skip[val >> 3] >> 2);
8644 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8645
8646 switch (r_type)
8647 {
8648 case R_PPC64_TOC16_HA:
8649 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8650 break;
8651
8652 case R_PPC64_TOC16_LO_DS:
8653 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8654 break;
8655
8656 default:
8657 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8658 ppc_howto_init ();
8659 info->callbacks->einfo
8660 (_("%P: %H: %s relocation references "
8661 "optimized away TOC entry\n"),
8662 ibfd, sec, rel->r_offset,
8663 ppc64_elf_howto_table[r_type]->name);
8664 bfd_set_error (bfd_error_bad_value);
8665 goto error_ret;
8666 }
8667 rel->r_addend = tocrel->r_addend;
8668 elf_section_data (sec)->relocs = relstart;
8669 continue;
8670 }
8671
8672 if (h != NULL || sym->st_value != 0)
8673 continue;
8674
8675 rel->r_addend -= skip[val >> 3];
8676 elf_section_data (sec)->relocs = relstart;
8677 }
8678
8679 if (elf_section_data (sec)->relocs != relstart)
8680 free (relstart);
8681 }
8682
8683 /* We shouldn't have local or global symbols defined in the TOC,
8684 but handle them anyway. */
8685 if (local_syms != NULL)
8686 for (sym = local_syms;
8687 sym < local_syms + symtab_hdr->sh_info;
8688 ++sym)
8689 if (sym->st_value != 0
8690 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8691 {
8692 unsigned long i;
8693
8694 if (sym->st_value > toc->rawsize)
8695 i = toc->rawsize >> 3;
8696 else
8697 i = sym->st_value >> 3;
8698
8699 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8700 {
8701 if (local_toc_syms)
8702 (*_bfd_error_handler)
8703 (_("%s defined on removed toc entry"),
8704 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8705 do
8706 ++i;
8707 while ((skip[i] & (ref_from_discarded | can_optimize)));
8708 sym->st_value = (bfd_vma) i << 3;
8709 }
8710
8711 sym->st_value -= skip[i];
8712 symtab_hdr->contents = (unsigned char *) local_syms;
8713 }
8714
8715 /* Adjust any global syms defined in this toc input section. */
8716 if (toc_inf.global_toc_syms)
8717 {
8718 toc_inf.toc = toc;
8719 toc_inf.skip = skip;
8720 toc_inf.global_toc_syms = FALSE;
8721 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8722 &toc_inf);
8723 }
8724
8725 if (toc->reloc_count != 0)
8726 {
8727 Elf_Internal_Shdr *rel_hdr;
8728 Elf_Internal_Rela *wrel;
8729 bfd_size_type sz;
8730
8731 /* Remove unused toc relocs, and adjust those we keep. */
8732 if (toc_relocs == NULL)
8733 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8734 info->keep_memory);
8735 if (toc_relocs == NULL)
8736 goto error_ret;
8737
8738 wrel = toc_relocs;
8739 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8740 if ((skip[rel->r_offset >> 3]
8741 & (ref_from_discarded | can_optimize)) == 0)
8742 {
8743 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8744 wrel->r_info = rel->r_info;
8745 wrel->r_addend = rel->r_addend;
8746 ++wrel;
8747 }
8748 else if (!dec_dynrel_count (rel->r_info, toc, info,
8749 &local_syms, NULL, NULL))
8750 goto error_ret;
8751
8752 elf_section_data (toc)->relocs = toc_relocs;
8753 toc->reloc_count = wrel - toc_relocs;
8754 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8755 sz = rel_hdr->sh_entsize;
8756 rel_hdr->sh_size = toc->reloc_count * sz;
8757 }
8758 }
8759 else if (toc_relocs != NULL
8760 && elf_section_data (toc)->relocs != toc_relocs)
8761 free (toc_relocs);
8762
8763 if (local_syms != NULL
8764 && symtab_hdr->contents != (unsigned char *) local_syms)
8765 {
8766 if (!info->keep_memory)
8767 free (local_syms);
8768 else
8769 symtab_hdr->contents = (unsigned char *) local_syms;
8770 }
8771 free (skip);
8772 }
8773
8774 return TRUE;
8775 }
8776
8777 /* Return true iff input section I references the TOC using
8778 instructions limited to +/-32k offsets. */
8779
8780 bfd_boolean
8781 ppc64_elf_has_small_toc_reloc (asection *i)
8782 {
8783 return (is_ppc64_elf (i->owner)
8784 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8785 }
8786
8787 /* Allocate space for one GOT entry. */
8788
8789 static void
8790 allocate_got (struct elf_link_hash_entry *h,
8791 struct bfd_link_info *info,
8792 struct got_entry *gent)
8793 {
8794 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8795 bfd_boolean dyn;
8796 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8797 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8798 ? 16 : 8);
8799 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8800 ? 2 : 1) * sizeof (Elf64_External_Rela);
8801 asection *got = ppc64_elf_tdata (gent->owner)->got;
8802
8803 gent->got.offset = got->size;
8804 got->size += entsize;
8805
8806 dyn = htab->elf.dynamic_sections_created;
8807 if ((info->shared
8808 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8809 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8810 || h->root.type != bfd_link_hash_undefweak))
8811 {
8812 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8813 relgot->size += rentsize;
8814 }
8815 else if (h->type == STT_GNU_IFUNC)
8816 {
8817 asection *relgot = htab->reliplt;
8818 relgot->size += rentsize;
8819 htab->got_reli_size += rentsize;
8820 }
8821 }
8822
8823 /* This function merges got entries in the same toc group. */
8824
8825 static void
8826 merge_got_entries (struct got_entry **pent)
8827 {
8828 struct got_entry *ent, *ent2;
8829
8830 for (ent = *pent; ent != NULL; ent = ent->next)
8831 if (!ent->is_indirect)
8832 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8833 if (!ent2->is_indirect
8834 && ent2->addend == ent->addend
8835 && ent2->tls_type == ent->tls_type
8836 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8837 {
8838 ent2->is_indirect = TRUE;
8839 ent2->got.ent = ent;
8840 }
8841 }
8842
8843 /* Allocate space in .plt, .got and associated reloc sections for
8844 dynamic relocs. */
8845
8846 static bfd_boolean
8847 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8848 {
8849 struct bfd_link_info *info;
8850 struct ppc_link_hash_table *htab;
8851 asection *s;
8852 struct ppc_link_hash_entry *eh;
8853 struct elf_dyn_relocs *p;
8854 struct got_entry **pgent, *gent;
8855
8856 if (h->root.type == bfd_link_hash_indirect)
8857 return TRUE;
8858
8859 info = (struct bfd_link_info *) inf;
8860 htab = ppc_hash_table (info);
8861 if (htab == NULL)
8862 return FALSE;
8863
8864 if ((htab->elf.dynamic_sections_created
8865 && h->dynindx != -1
8866 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8867 || h->type == STT_GNU_IFUNC)
8868 {
8869 struct plt_entry *pent;
8870 bfd_boolean doneone = FALSE;
8871 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8872 if (pent->plt.refcount > 0)
8873 {
8874 if (!htab->elf.dynamic_sections_created
8875 || h->dynindx == -1)
8876 {
8877 s = htab->iplt;
8878 pent->plt.offset = s->size;
8879 s->size += PLT_ENTRY_SIZE;
8880 s = htab->reliplt;
8881 }
8882 else
8883 {
8884 /* If this is the first .plt entry, make room for the special
8885 first entry. */
8886 s = htab->plt;
8887 if (s->size == 0)
8888 s->size += PLT_INITIAL_ENTRY_SIZE;
8889
8890 pent->plt.offset = s->size;
8891
8892 /* Make room for this entry. */
8893 s->size += PLT_ENTRY_SIZE;
8894
8895 /* Make room for the .glink code. */
8896 s = htab->glink;
8897 if (s->size == 0)
8898 s->size += GLINK_CALL_STUB_SIZE;
8899 /* We need bigger stubs past index 32767. */
8900 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8901 s->size += 4;
8902 s->size += 2*4;
8903
8904 /* We also need to make an entry in the .rela.plt section. */
8905 s = htab->relplt;
8906 }
8907 s->size += sizeof (Elf64_External_Rela);
8908 doneone = TRUE;
8909 }
8910 else
8911 pent->plt.offset = (bfd_vma) -1;
8912 if (!doneone)
8913 {
8914 h->plt.plist = NULL;
8915 h->needs_plt = 0;
8916 }
8917 }
8918 else
8919 {
8920 h->plt.plist = NULL;
8921 h->needs_plt = 0;
8922 }
8923
8924 eh = (struct ppc_link_hash_entry *) h;
8925 /* Run through the TLS GD got entries first if we're changing them
8926 to TPREL. */
8927 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8928 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8929 if (gent->got.refcount > 0
8930 && (gent->tls_type & TLS_GD) != 0)
8931 {
8932 /* This was a GD entry that has been converted to TPREL. If
8933 there happens to be a TPREL entry we can use that one. */
8934 struct got_entry *ent;
8935 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8936 if (ent->got.refcount > 0
8937 && (ent->tls_type & TLS_TPREL) != 0
8938 && ent->addend == gent->addend
8939 && ent->owner == gent->owner)
8940 {
8941 gent->got.refcount = 0;
8942 break;
8943 }
8944
8945 /* If not, then we'll be using our own TPREL entry. */
8946 if (gent->got.refcount != 0)
8947 gent->tls_type = TLS_TLS | TLS_TPREL;
8948 }
8949
8950 /* Remove any list entry that won't generate a word in the GOT before
8951 we call merge_got_entries. Otherwise we risk merging to empty
8952 entries. */
8953 pgent = &h->got.glist;
8954 while ((gent = *pgent) != NULL)
8955 if (gent->got.refcount > 0)
8956 {
8957 if ((gent->tls_type & TLS_LD) != 0
8958 && !h->def_dynamic)
8959 {
8960 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8961 *pgent = gent->next;
8962 }
8963 else
8964 pgent = &gent->next;
8965 }
8966 else
8967 *pgent = gent->next;
8968
8969 if (!htab->do_multi_toc)
8970 merge_got_entries (&h->got.glist);
8971
8972 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8973 if (!gent->is_indirect)
8974 {
8975 /* Make sure this symbol is output as a dynamic symbol.
8976 Undefined weak syms won't yet be marked as dynamic,
8977 nor will all TLS symbols. */
8978 if (h->dynindx == -1
8979 && !h->forced_local
8980 && h->type != STT_GNU_IFUNC
8981 && htab->elf.dynamic_sections_created)
8982 {
8983 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8984 return FALSE;
8985 }
8986
8987 if (!is_ppc64_elf (gent->owner))
8988 abort ();
8989
8990 allocate_got (h, info, gent);
8991 }
8992
8993 if (eh->dyn_relocs == NULL
8994 || (!htab->elf.dynamic_sections_created
8995 && h->type != STT_GNU_IFUNC))
8996 return TRUE;
8997
8998 /* In the shared -Bsymbolic case, discard space allocated for
8999 dynamic pc-relative relocs against symbols which turn out to be
9000 defined in regular objects. For the normal shared case, discard
9001 space for relocs that have become local due to symbol visibility
9002 changes. */
9003
9004 if (info->shared)
9005 {
9006 /* Relocs that use pc_count are those that appear on a call insn,
9007 or certain REL relocs (see must_be_dyn_reloc) that can be
9008 generated via assembly. We want calls to protected symbols to
9009 resolve directly to the function rather than going via the plt.
9010 If people want function pointer comparisons to work as expected
9011 then they should avoid writing weird assembly. */
9012 if (SYMBOL_CALLS_LOCAL (info, h))
9013 {
9014 struct elf_dyn_relocs **pp;
9015
9016 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9017 {
9018 p->count -= p->pc_count;
9019 p->pc_count = 0;
9020 if (p->count == 0)
9021 *pp = p->next;
9022 else
9023 pp = &p->next;
9024 }
9025 }
9026
9027 /* Also discard relocs on undefined weak syms with non-default
9028 visibility. */
9029 if (eh->dyn_relocs != NULL
9030 && h->root.type == bfd_link_hash_undefweak)
9031 {
9032 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9033 eh->dyn_relocs = NULL;
9034
9035 /* Make sure this symbol is output as a dynamic symbol.
9036 Undefined weak syms won't yet be marked as dynamic. */
9037 else if (h->dynindx == -1
9038 && !h->forced_local)
9039 {
9040 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9041 return FALSE;
9042 }
9043 }
9044 }
9045 else if (h->type == STT_GNU_IFUNC)
9046 {
9047 if (!h->non_got_ref)
9048 eh->dyn_relocs = NULL;
9049 }
9050 else if (ELIMINATE_COPY_RELOCS)
9051 {
9052 /* For the non-shared case, discard space for relocs against
9053 symbols which turn out to need copy relocs or are not
9054 dynamic. */
9055
9056 if (!h->non_got_ref
9057 && !h->def_regular)
9058 {
9059 /* Make sure this symbol is output as a dynamic symbol.
9060 Undefined weak syms won't yet be marked as dynamic. */
9061 if (h->dynindx == -1
9062 && !h->forced_local)
9063 {
9064 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9065 return FALSE;
9066 }
9067
9068 /* If that succeeded, we know we'll be keeping all the
9069 relocs. */
9070 if (h->dynindx != -1)
9071 goto keep;
9072 }
9073
9074 eh->dyn_relocs = NULL;
9075
9076 keep: ;
9077 }
9078
9079 /* Finally, allocate space. */
9080 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9081 {
9082 asection *sreloc = elf_section_data (p->sec)->sreloc;
9083 if (!htab->elf.dynamic_sections_created)
9084 sreloc = htab->reliplt;
9085 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9086 }
9087
9088 return TRUE;
9089 }
9090
9091 /* Find any dynamic relocs that apply to read-only sections. */
9092
9093 static bfd_boolean
9094 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9095 {
9096 struct ppc_link_hash_entry *eh;
9097 struct elf_dyn_relocs *p;
9098
9099 eh = (struct ppc_link_hash_entry *) h;
9100 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9101 {
9102 asection *s = p->sec->output_section;
9103
9104 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9105 {
9106 struct bfd_link_info *info = inf;
9107
9108 info->flags |= DF_TEXTREL;
9109
9110 /* Not an error, just cut short the traversal. */
9111 return FALSE;
9112 }
9113 }
9114 return TRUE;
9115 }
9116
9117 /* Set the sizes of the dynamic sections. */
9118
9119 static bfd_boolean
9120 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9121 struct bfd_link_info *info)
9122 {
9123 struct ppc_link_hash_table *htab;
9124 bfd *dynobj;
9125 asection *s;
9126 bfd_boolean relocs;
9127 bfd *ibfd;
9128 struct got_entry *first_tlsld;
9129
9130 htab = ppc_hash_table (info);
9131 if (htab == NULL)
9132 return FALSE;
9133
9134 dynobj = htab->elf.dynobj;
9135 if (dynobj == NULL)
9136 abort ();
9137
9138 if (htab->elf.dynamic_sections_created)
9139 {
9140 /* Set the contents of the .interp section to the interpreter. */
9141 if (info->executable)
9142 {
9143 s = bfd_get_linker_section (dynobj, ".interp");
9144 if (s == NULL)
9145 abort ();
9146 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9147 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9148 }
9149 }
9150
9151 /* Set up .got offsets for local syms, and space for local dynamic
9152 relocs. */
9153 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9154 {
9155 struct got_entry **lgot_ents;
9156 struct got_entry **end_lgot_ents;
9157 struct plt_entry **local_plt;
9158 struct plt_entry **end_local_plt;
9159 unsigned char *lgot_masks;
9160 bfd_size_type locsymcount;
9161 Elf_Internal_Shdr *symtab_hdr;
9162 asection *srel;
9163
9164 if (!is_ppc64_elf (ibfd))
9165 continue;
9166
9167 for (s = ibfd->sections; s != NULL; s = s->next)
9168 {
9169 struct elf_dyn_relocs *p;
9170
9171 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9172 {
9173 if (!bfd_is_abs_section (p->sec)
9174 && bfd_is_abs_section (p->sec->output_section))
9175 {
9176 /* Input section has been discarded, either because
9177 it is a copy of a linkonce section or due to
9178 linker script /DISCARD/, so we'll be discarding
9179 the relocs too. */
9180 }
9181 else if (p->count != 0)
9182 {
9183 srel = elf_section_data (p->sec)->sreloc;
9184 if (!htab->elf.dynamic_sections_created)
9185 srel = htab->reliplt;
9186 srel->size += p->count * sizeof (Elf64_External_Rela);
9187 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9188 info->flags |= DF_TEXTREL;
9189 }
9190 }
9191 }
9192
9193 lgot_ents = elf_local_got_ents (ibfd);
9194 if (!lgot_ents)
9195 continue;
9196
9197 symtab_hdr = &elf_symtab_hdr (ibfd);
9198 locsymcount = symtab_hdr->sh_info;
9199 end_lgot_ents = lgot_ents + locsymcount;
9200 local_plt = (struct plt_entry **) end_lgot_ents;
9201 end_local_plt = local_plt + locsymcount;
9202 lgot_masks = (unsigned char *) end_local_plt;
9203 s = ppc64_elf_tdata (ibfd)->got;
9204 srel = ppc64_elf_tdata (ibfd)->relgot;
9205 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9206 {
9207 struct got_entry **pent, *ent;
9208
9209 pent = lgot_ents;
9210 while ((ent = *pent) != NULL)
9211 if (ent->got.refcount > 0)
9212 {
9213 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9214 {
9215 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9216 *pent = ent->next;
9217 }
9218 else
9219 {
9220 unsigned int num = 1;
9221 ent->got.offset = s->size;
9222 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9223 num = 2;
9224 s->size += num * 8;
9225 if (info->shared)
9226 srel->size += num * sizeof (Elf64_External_Rela);
9227 else if ((*lgot_masks & PLT_IFUNC) != 0)
9228 {
9229 htab->reliplt->size
9230 += num * sizeof (Elf64_External_Rela);
9231 htab->got_reli_size
9232 += num * sizeof (Elf64_External_Rela);
9233 }
9234 pent = &ent->next;
9235 }
9236 }
9237 else
9238 *pent = ent->next;
9239 }
9240
9241 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9242 for (; local_plt < end_local_plt; ++local_plt)
9243 {
9244 struct plt_entry *ent;
9245
9246 for (ent = *local_plt; ent != NULL; ent = ent->next)
9247 if (ent->plt.refcount > 0)
9248 {
9249 s = htab->iplt;
9250 ent->plt.offset = s->size;
9251 s->size += PLT_ENTRY_SIZE;
9252
9253 htab->reliplt->size += sizeof (Elf64_External_Rela);
9254 }
9255 else
9256 ent->plt.offset = (bfd_vma) -1;
9257 }
9258 }
9259
9260 /* Allocate global sym .plt and .got entries, and space for global
9261 sym dynamic relocs. */
9262 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9263
9264 first_tlsld = NULL;
9265 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9266 {
9267 struct got_entry *ent;
9268
9269 if (!is_ppc64_elf (ibfd))
9270 continue;
9271
9272 ent = ppc64_tlsld_got (ibfd);
9273 if (ent->got.refcount > 0)
9274 {
9275 if (!htab->do_multi_toc && first_tlsld != NULL)
9276 {
9277 ent->is_indirect = TRUE;
9278 ent->got.ent = first_tlsld;
9279 }
9280 else
9281 {
9282 if (first_tlsld == NULL)
9283 first_tlsld = ent;
9284 s = ppc64_elf_tdata (ibfd)->got;
9285 ent->got.offset = s->size;
9286 ent->owner = ibfd;
9287 s->size += 16;
9288 if (info->shared)
9289 {
9290 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9291 srel->size += sizeof (Elf64_External_Rela);
9292 }
9293 }
9294 }
9295 else
9296 ent->got.offset = (bfd_vma) -1;
9297 }
9298
9299 /* We now have determined the sizes of the various dynamic sections.
9300 Allocate memory for them. */
9301 relocs = FALSE;
9302 for (s = dynobj->sections; s != NULL; s = s->next)
9303 {
9304 if ((s->flags & SEC_LINKER_CREATED) == 0)
9305 continue;
9306
9307 if (s == htab->brlt || s == htab->relbrlt)
9308 /* These haven't been allocated yet; don't strip. */
9309 continue;
9310 else if (s == htab->got
9311 || s == htab->plt
9312 || s == htab->iplt
9313 || s == htab->glink
9314 || s == htab->dynbss)
9315 {
9316 /* Strip this section if we don't need it; see the
9317 comment below. */
9318 }
9319 else if (s == htab->glink_eh_frame)
9320 {
9321 if (!bfd_is_abs_section (s->output_section))
9322 /* Not sized yet. */
9323 continue;
9324 }
9325 else if (CONST_STRNEQ (s->name, ".rela"))
9326 {
9327 if (s->size != 0)
9328 {
9329 if (s != htab->relplt)
9330 relocs = TRUE;
9331
9332 /* We use the reloc_count field as a counter if we need
9333 to copy relocs into the output file. */
9334 s->reloc_count = 0;
9335 }
9336 }
9337 else
9338 {
9339 /* It's not one of our sections, so don't allocate space. */
9340 continue;
9341 }
9342
9343 if (s->size == 0)
9344 {
9345 /* If we don't need this section, strip it from the
9346 output file. This is mostly to handle .rela.bss and
9347 .rela.plt. We must create both sections in
9348 create_dynamic_sections, because they must be created
9349 before the linker maps input sections to output
9350 sections. The linker does that before
9351 adjust_dynamic_symbol is called, and it is that
9352 function which decides whether anything needs to go
9353 into these sections. */
9354 s->flags |= SEC_EXCLUDE;
9355 continue;
9356 }
9357
9358 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9359 continue;
9360
9361 /* Allocate memory for the section contents. We use bfd_zalloc
9362 here in case unused entries are not reclaimed before the
9363 section's contents are written out. This should not happen,
9364 but this way if it does we get a R_PPC64_NONE reloc in .rela
9365 sections instead of garbage.
9366 We also rely on the section contents being zero when writing
9367 the GOT. */
9368 s->contents = bfd_zalloc (dynobj, s->size);
9369 if (s->contents == NULL)
9370 return FALSE;
9371 }
9372
9373 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9374 {
9375 if (!is_ppc64_elf (ibfd))
9376 continue;
9377
9378 s = ppc64_elf_tdata (ibfd)->got;
9379 if (s != NULL && s != htab->got)
9380 {
9381 if (s->size == 0)
9382 s->flags |= SEC_EXCLUDE;
9383 else
9384 {
9385 s->contents = bfd_zalloc (ibfd, s->size);
9386 if (s->contents == NULL)
9387 return FALSE;
9388 }
9389 }
9390 s = ppc64_elf_tdata (ibfd)->relgot;
9391 if (s != NULL)
9392 {
9393 if (s->size == 0)
9394 s->flags |= SEC_EXCLUDE;
9395 else
9396 {
9397 s->contents = bfd_zalloc (ibfd, s->size);
9398 if (s->contents == NULL)
9399 return FALSE;
9400 relocs = TRUE;
9401 s->reloc_count = 0;
9402 }
9403 }
9404 }
9405
9406 if (htab->elf.dynamic_sections_created)
9407 {
9408 /* Add some entries to the .dynamic section. We fill in the
9409 values later, in ppc64_elf_finish_dynamic_sections, but we
9410 must add the entries now so that we get the correct size for
9411 the .dynamic section. The DT_DEBUG entry is filled in by the
9412 dynamic linker and used by the debugger. */
9413 #define add_dynamic_entry(TAG, VAL) \
9414 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9415
9416 if (info->executable)
9417 {
9418 if (!add_dynamic_entry (DT_DEBUG, 0))
9419 return FALSE;
9420 }
9421
9422 if (htab->plt != NULL && htab->plt->size != 0)
9423 {
9424 if (!add_dynamic_entry (DT_PLTGOT, 0)
9425 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9426 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9427 || !add_dynamic_entry (DT_JMPREL, 0)
9428 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9429 return FALSE;
9430 }
9431
9432 if (NO_OPD_RELOCS)
9433 {
9434 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9435 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9436 return FALSE;
9437 }
9438
9439 if (!htab->no_tls_get_addr_opt
9440 && htab->tls_get_addr_fd != NULL
9441 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9442 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9443 return FALSE;
9444
9445 if (relocs)
9446 {
9447 if (!add_dynamic_entry (DT_RELA, 0)
9448 || !add_dynamic_entry (DT_RELASZ, 0)
9449 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9450 return FALSE;
9451
9452 /* If any dynamic relocs apply to a read-only section,
9453 then we need a DT_TEXTREL entry. */
9454 if ((info->flags & DF_TEXTREL) == 0)
9455 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9456
9457 if ((info->flags & DF_TEXTREL) != 0)
9458 {
9459 if (!add_dynamic_entry (DT_TEXTREL, 0))
9460 return FALSE;
9461 }
9462 }
9463 }
9464 #undef add_dynamic_entry
9465
9466 return TRUE;
9467 }
9468
9469 /* Determine the type of stub needed, if any, for a call. */
9470
9471 static inline enum ppc_stub_type
9472 ppc_type_of_stub (asection *input_sec,
9473 const Elf_Internal_Rela *rel,
9474 struct ppc_link_hash_entry **hash,
9475 struct plt_entry **plt_ent,
9476 bfd_vma destination)
9477 {
9478 struct ppc_link_hash_entry *h = *hash;
9479 bfd_vma location;
9480 bfd_vma branch_offset;
9481 bfd_vma max_branch_offset;
9482 enum elf_ppc64_reloc_type r_type;
9483
9484 if (h != NULL)
9485 {
9486 struct plt_entry *ent;
9487 struct ppc_link_hash_entry *fdh = h;
9488 if (h->oh != NULL
9489 && h->oh->is_func_descriptor)
9490 {
9491 fdh = ppc_follow_link (h->oh);
9492 *hash = fdh;
9493 }
9494
9495 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9496 if (ent->addend == rel->r_addend
9497 && ent->plt.offset != (bfd_vma) -1)
9498 {
9499 *plt_ent = ent;
9500 return ppc_stub_plt_call;
9501 }
9502
9503 /* Here, we know we don't have a plt entry. If we don't have a
9504 either a defined function descriptor or a defined entry symbol
9505 in a regular object file, then it is pointless trying to make
9506 any other type of stub. */
9507 if (!is_static_defined (&fdh->elf)
9508 && !is_static_defined (&h->elf))
9509 return ppc_stub_none;
9510 }
9511 else if (elf_local_got_ents (input_sec->owner) != NULL)
9512 {
9513 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9514 struct plt_entry **local_plt = (struct plt_entry **)
9515 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9516 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9517
9518 if (local_plt[r_symndx] != NULL)
9519 {
9520 struct plt_entry *ent;
9521
9522 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9523 if (ent->addend == rel->r_addend
9524 && ent->plt.offset != (bfd_vma) -1)
9525 {
9526 *plt_ent = ent;
9527 return ppc_stub_plt_call;
9528 }
9529 }
9530 }
9531
9532 /* Determine where the call point is. */
9533 location = (input_sec->output_offset
9534 + input_sec->output_section->vma
9535 + rel->r_offset);
9536
9537 branch_offset = destination - location;
9538 r_type = ELF64_R_TYPE (rel->r_info);
9539
9540 /* Determine if a long branch stub is needed. */
9541 max_branch_offset = 1 << 25;
9542 if (r_type != R_PPC64_REL24)
9543 max_branch_offset = 1 << 15;
9544
9545 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9546 /* We need a stub. Figure out whether a long_branch or plt_branch
9547 is needed later. */
9548 return ppc_stub_long_branch;
9549
9550 return ppc_stub_none;
9551 }
9552
9553 /* With power7 weakly ordered memory model, it is possible for ld.so
9554 to update a plt entry in one thread and have another thread see a
9555 stale zero toc entry. To avoid this we need some sort of acquire
9556 barrier in the call stub. One solution is to make the load of the
9557 toc word seem to appear to depend on the load of the function entry
9558 word. Another solution is to test for r2 being zero, and branch to
9559 the appropriate glink entry if so.
9560
9561 . fake dep barrier compare
9562 . ld 11,xxx(2) ld 11,xxx(2)
9563 . mtctr 11 mtctr 11
9564 . xor 11,11,11 ld 2,xxx+8(2)
9565 . add 2,2,11 cmpldi 2,0
9566 . ld 2,xxx+8(2) bnectr+
9567 . bctr b <glink_entry>
9568
9569 The solution involving the compare turns out to be faster, so
9570 that's what we use unless the branch won't reach. */
9571
9572 #define ALWAYS_USE_FAKE_DEP 0
9573 #define ALWAYS_EMIT_R2SAVE 0
9574
9575 #define PPC_LO(v) ((v) & 0xffff)
9576 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9577 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9578
9579 static inline unsigned int
9580 plt_stub_size (struct ppc_link_hash_table *htab,
9581 struct ppc_stub_hash_entry *stub_entry,
9582 bfd_vma off)
9583 {
9584 unsigned size = PLT_CALL_STUB_SIZE;
9585
9586 if (!(ALWAYS_EMIT_R2SAVE
9587 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9588 size -= 4;
9589 if (!htab->plt_static_chain)
9590 size -= 4;
9591 if (htab->plt_thread_safe)
9592 size += 8;
9593 if (PPC_HA (off) == 0)
9594 size -= 4;
9595 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9596 size += 4;
9597 if (stub_entry->h != NULL
9598 && (stub_entry->h == htab->tls_get_addr_fd
9599 || stub_entry->h == htab->tls_get_addr)
9600 && !htab->no_tls_get_addr_opt)
9601 size += 13 * 4;
9602 return size;
9603 }
9604
9605 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9606 then return the padding needed to do so. */
9607 static inline unsigned int
9608 plt_stub_pad (struct ppc_link_hash_table *htab,
9609 struct ppc_stub_hash_entry *stub_entry,
9610 bfd_vma plt_off)
9611 {
9612 int stub_align = 1 << htab->plt_stub_align;
9613 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9614 bfd_vma stub_off = stub_entry->stub_sec->size;
9615
9616 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9617 > (stub_size & -stub_align))
9618 return stub_align - (stub_off & (stub_align - 1));
9619 return 0;
9620 }
9621
9622 /* Build a .plt call stub. */
9623
9624 static inline bfd_byte *
9625 build_plt_stub (struct ppc_link_hash_table *htab,
9626 struct ppc_stub_hash_entry *stub_entry,
9627 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9628 {
9629 bfd *obfd = htab->stub_bfd;
9630 bfd_boolean plt_static_chain = htab->plt_static_chain;
9631 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9632 bfd_boolean use_fake_dep = plt_thread_safe;
9633 bfd_vma cmp_branch_off = 0;
9634
9635 if (!ALWAYS_USE_FAKE_DEP
9636 && plt_thread_safe
9637 && !(stub_entry->h != NULL
9638 && (stub_entry->h == htab->tls_get_addr_fd
9639 || stub_entry->h == htab->tls_get_addr)
9640 && !htab->no_tls_get_addr_opt))
9641 {
9642 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9643 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9644 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9645 bfd_vma to, from;
9646
9647 if (pltindex > 32767)
9648 glinkoff += (pltindex - 32767) * 4;
9649 to = (glinkoff
9650 + htab->glink->output_offset
9651 + htab->glink->output_section->vma);
9652 from = (p - stub_entry->stub_sec->contents
9653 + 4 * (ALWAYS_EMIT_R2SAVE
9654 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9655 + 4 * (PPC_HA (offset) != 0)
9656 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9657 != PPC_HA (offset))
9658 + 4 * (plt_static_chain != 0)
9659 + 20
9660 + stub_entry->stub_sec->output_offset
9661 + stub_entry->stub_sec->output_section->vma);
9662 cmp_branch_off = to - from;
9663 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9664 }
9665
9666 if (PPC_HA (offset) != 0)
9667 {
9668 if (r != NULL)
9669 {
9670 if (ALWAYS_EMIT_R2SAVE
9671 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9672 r[0].r_offset += 4;
9673 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9674 r[1].r_offset = r[0].r_offset + 4;
9675 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9676 r[1].r_addend = r[0].r_addend;
9677 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9678 {
9679 r[2].r_offset = r[1].r_offset + 4;
9680 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9681 r[2].r_addend = r[0].r_addend;
9682 }
9683 else
9684 {
9685 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9686 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9687 r[2].r_addend = r[0].r_addend + 8;
9688 if (plt_static_chain)
9689 {
9690 r[3].r_offset = r[2].r_offset + 4;
9691 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9692 r[3].r_addend = r[0].r_addend + 16;
9693 }
9694 }
9695 }
9696 if (ALWAYS_EMIT_R2SAVE
9697 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9698 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9699 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9700 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9701 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9702 {
9703 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9704 offset = 0;
9705 }
9706 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9707 if (use_fake_dep)
9708 {
9709 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9710 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9711 }
9712 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9713 if (plt_static_chain)
9714 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9715 }
9716 else
9717 {
9718 if (r != NULL)
9719 {
9720 if (ALWAYS_EMIT_R2SAVE
9721 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9722 r[0].r_offset += 4;
9723 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9724 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9725 {
9726 r[1].r_offset = r[0].r_offset + 4;
9727 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9728 r[1].r_addend = r[0].r_addend;
9729 }
9730 else
9731 {
9732 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9733 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9734 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9735 if (plt_static_chain)
9736 {
9737 r[2].r_offset = r[1].r_offset + 4;
9738 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9739 r[2].r_addend = r[0].r_addend + 8;
9740 }
9741 }
9742 }
9743 if (ALWAYS_EMIT_R2SAVE
9744 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9745 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9746 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9747 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9748 {
9749 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9750 offset = 0;
9751 }
9752 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9753 if (use_fake_dep)
9754 {
9755 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9756 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9757 }
9758 if (plt_static_chain)
9759 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9760 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9761 }
9762 if (plt_thread_safe && !use_fake_dep)
9763 {
9764 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9765 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9766 bfd_put_32 (obfd, B_DOT + cmp_branch_off, p), p += 4;
9767 }
9768 else
9769 bfd_put_32 (obfd, BCTR, p), p += 4;
9770 return p;
9771 }
9772
9773 /* Build a special .plt call stub for __tls_get_addr. */
9774
9775 #define LD_R11_0R3 0xe9630000
9776 #define LD_R12_0R3 0xe9830000
9777 #define MR_R0_R3 0x7c601b78
9778 #define CMPDI_R11_0 0x2c2b0000
9779 #define ADD_R3_R12_R13 0x7c6c6a14
9780 #define BEQLR 0x4d820020
9781 #define MR_R3_R0 0x7c030378
9782 #define MFLR_R11 0x7d6802a6
9783 #define STD_R11_0R1 0xf9610000
9784 #define BCTRL 0x4e800421
9785 #define LD_R11_0R1 0xe9610000
9786 #define LD_R2_0R1 0xe8410000
9787 #define MTLR_R11 0x7d6803a6
9788
9789 static inline bfd_byte *
9790 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9791 struct ppc_stub_hash_entry *stub_entry,
9792 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9793 {
9794 bfd *obfd = htab->stub_bfd;
9795
9796 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9797 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9798 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9799 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9800 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9801 bfd_put_32 (obfd, BEQLR, p), p += 4;
9802 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9803 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9804 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9805
9806 if (r != NULL)
9807 r[0].r_offset += 9 * 4;
9808 p = build_plt_stub (htab, stub_entry, p, offset, r);
9809 bfd_put_32 (obfd, BCTRL, p - 4);
9810
9811 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9812 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9813 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9814 bfd_put_32 (obfd, BLR, p), p += 4;
9815
9816 return p;
9817 }
9818
9819 static Elf_Internal_Rela *
9820 get_relocs (asection *sec, int count)
9821 {
9822 Elf_Internal_Rela *relocs;
9823 struct bfd_elf_section_data *elfsec_data;
9824
9825 elfsec_data = elf_section_data (sec);
9826 relocs = elfsec_data->relocs;
9827 if (relocs == NULL)
9828 {
9829 bfd_size_type relsize;
9830 relsize = sec->reloc_count * sizeof (*relocs);
9831 relocs = bfd_alloc (sec->owner, relsize);
9832 if (relocs == NULL)
9833 return NULL;
9834 elfsec_data->relocs = relocs;
9835 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9836 sizeof (Elf_Internal_Shdr));
9837 if (elfsec_data->rela.hdr == NULL)
9838 return NULL;
9839 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9840 * sizeof (Elf64_External_Rela));
9841 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9842 sec->reloc_count = 0;
9843 }
9844 relocs += sec->reloc_count;
9845 sec->reloc_count += count;
9846 return relocs;
9847 }
9848
9849 static bfd_vma
9850 get_r2off (struct bfd_link_info *info,
9851 struct ppc_stub_hash_entry *stub_entry)
9852 {
9853 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9854 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9855
9856 if (r2off == 0)
9857 {
9858 /* Support linking -R objects. Get the toc pointer from the
9859 opd entry. */
9860 char buf[8];
9861 asection *opd = stub_entry->h->elf.root.u.def.section;
9862 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9863
9864 if (strcmp (opd->name, ".opd") != 0
9865 || opd->reloc_count != 0)
9866 {
9867 info->callbacks->einfo (_("%P: cannot find opd entry toc for %s\n"),
9868 stub_entry->h->elf.root.root.string);
9869 bfd_set_error (bfd_error_bad_value);
9870 return 0;
9871 }
9872 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9873 return 0;
9874 r2off = bfd_get_64 (opd->owner, buf);
9875 r2off -= elf_gp (info->output_bfd);
9876 }
9877 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9878 return r2off;
9879 }
9880
9881 static bfd_boolean
9882 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9883 {
9884 struct ppc_stub_hash_entry *stub_entry;
9885 struct ppc_branch_hash_entry *br_entry;
9886 struct bfd_link_info *info;
9887 struct ppc_link_hash_table *htab;
9888 bfd_byte *loc;
9889 bfd_byte *p;
9890 bfd_vma dest, off;
9891 int size;
9892 Elf_Internal_Rela *r;
9893 asection *plt;
9894
9895 /* Massage our args to the form they really have. */
9896 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9897 info = in_arg;
9898
9899 htab = ppc_hash_table (info);
9900 if (htab == NULL)
9901 return FALSE;
9902
9903 /* Make a note of the offset within the stubs for this entry. */
9904 stub_entry->stub_offset = stub_entry->stub_sec->size;
9905 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9906
9907 htab->stub_count[stub_entry->stub_type - 1] += 1;
9908 switch (stub_entry->stub_type)
9909 {
9910 case ppc_stub_long_branch:
9911 case ppc_stub_long_branch_r2off:
9912 /* Branches are relative. This is where we are going to. */
9913 off = dest = (stub_entry->target_value
9914 + stub_entry->target_section->output_offset
9915 + stub_entry->target_section->output_section->vma);
9916
9917 /* And this is where we are coming from. */
9918 off -= (stub_entry->stub_offset
9919 + stub_entry->stub_sec->output_offset
9920 + stub_entry->stub_sec->output_section->vma);
9921
9922 size = 4;
9923 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9924 {
9925 bfd_vma r2off = get_r2off (info, stub_entry);
9926
9927 if (r2off == 0)
9928 {
9929 htab->stub_error = TRUE;
9930 return FALSE;
9931 }
9932 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9933 loc += 4;
9934 size = 12;
9935 if (PPC_HA (r2off) != 0)
9936 {
9937 size = 16;
9938 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9939 loc += 4;
9940 }
9941 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9942 loc += 4;
9943 off -= size - 4;
9944 }
9945 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9946
9947 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9948 {
9949 info->callbacks->einfo (_("%P: long branch stub `%s' offset overflow\n"),
9950 stub_entry->root.string);
9951 htab->stub_error = TRUE;
9952 return FALSE;
9953 }
9954
9955 if (info->emitrelocations)
9956 {
9957 r = get_relocs (stub_entry->stub_sec, 1);
9958 if (r == NULL)
9959 return FALSE;
9960 r->r_offset = loc - stub_entry->stub_sec->contents;
9961 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9962 r->r_addend = dest;
9963 if (stub_entry->h != NULL)
9964 {
9965 struct elf_link_hash_entry **hashes;
9966 unsigned long symndx;
9967 struct ppc_link_hash_entry *h;
9968
9969 hashes = elf_sym_hashes (htab->stub_bfd);
9970 if (hashes == NULL)
9971 {
9972 bfd_size_type hsize;
9973
9974 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9975 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9976 if (hashes == NULL)
9977 return FALSE;
9978 elf_sym_hashes (htab->stub_bfd) = hashes;
9979 htab->stub_globals = 1;
9980 }
9981 symndx = htab->stub_globals++;
9982 h = stub_entry->h;
9983 hashes[symndx] = &h->elf;
9984 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9985 if (h->oh != NULL && h->oh->is_func)
9986 h = ppc_follow_link (h->oh);
9987 if (h->elf.root.u.def.section != stub_entry->target_section)
9988 /* H is an opd symbol. The addend must be zero. */
9989 r->r_addend = 0;
9990 else
9991 {
9992 off = (h->elf.root.u.def.value
9993 + h->elf.root.u.def.section->output_offset
9994 + h->elf.root.u.def.section->output_section->vma);
9995 r->r_addend -= off;
9996 }
9997 }
9998 }
9999 break;
10000
10001 case ppc_stub_plt_branch:
10002 case ppc_stub_plt_branch_r2off:
10003 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10004 stub_entry->root.string + 9,
10005 FALSE, FALSE);
10006 if (br_entry == NULL)
10007 {
10008 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10009 stub_entry->root.string);
10010 htab->stub_error = TRUE;
10011 return FALSE;
10012 }
10013
10014 dest = (stub_entry->target_value
10015 + stub_entry->target_section->output_offset
10016 + stub_entry->target_section->output_section->vma);
10017
10018 bfd_put_64 (htab->brlt->owner, dest,
10019 htab->brlt->contents + br_entry->offset);
10020
10021 if (br_entry->iter == htab->stub_iteration)
10022 {
10023 br_entry->iter = 0;
10024
10025 if (htab->relbrlt != NULL)
10026 {
10027 /* Create a reloc for the branch lookup table entry. */
10028 Elf_Internal_Rela rela;
10029 bfd_byte *rl;
10030
10031 rela.r_offset = (br_entry->offset
10032 + htab->brlt->output_offset
10033 + htab->brlt->output_section->vma);
10034 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10035 rela.r_addend = dest;
10036
10037 rl = htab->relbrlt->contents;
10038 rl += (htab->relbrlt->reloc_count++
10039 * sizeof (Elf64_External_Rela));
10040 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10041 }
10042 else if (info->emitrelocations)
10043 {
10044 r = get_relocs (htab->brlt, 1);
10045 if (r == NULL)
10046 return FALSE;
10047 /* brlt, being SEC_LINKER_CREATED does not go through the
10048 normal reloc processing. Symbols and offsets are not
10049 translated from input file to output file form, so
10050 set up the offset per the output file. */
10051 r->r_offset = (br_entry->offset
10052 + htab->brlt->output_offset
10053 + htab->brlt->output_section->vma);
10054 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10055 r->r_addend = dest;
10056 }
10057 }
10058
10059 dest = (br_entry->offset
10060 + htab->brlt->output_offset
10061 + htab->brlt->output_section->vma);
10062
10063 off = (dest
10064 - elf_gp (htab->brlt->output_section->owner)
10065 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10066
10067 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10068 {
10069 info->callbacks->einfo
10070 (_("%P: linkage table error against `%s'\n"),
10071 stub_entry->root.string);
10072 bfd_set_error (bfd_error_bad_value);
10073 htab->stub_error = TRUE;
10074 return FALSE;
10075 }
10076
10077 if (info->emitrelocations)
10078 {
10079 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10080 if (r == NULL)
10081 return FALSE;
10082 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10083 if (bfd_big_endian (info->output_bfd))
10084 r[0].r_offset += 2;
10085 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10086 r[0].r_offset += 4;
10087 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10088 r[0].r_addend = dest;
10089 if (PPC_HA (off) != 0)
10090 {
10091 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10092 r[1].r_offset = r[0].r_offset + 4;
10093 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10094 r[1].r_addend = r[0].r_addend;
10095 }
10096 }
10097
10098 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10099 {
10100 if (PPC_HA (off) != 0)
10101 {
10102 size = 16;
10103 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10104 loc += 4;
10105 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10106 }
10107 else
10108 {
10109 size = 12;
10110 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10111 }
10112 }
10113 else
10114 {
10115 bfd_vma r2off = get_r2off (info, stub_entry);
10116
10117 if (r2off == 0)
10118 {
10119 htab->stub_error = TRUE;
10120 return FALSE;
10121 }
10122
10123 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10124 loc += 4;
10125 size = 20;
10126 if (PPC_HA (off) != 0)
10127 {
10128 size += 4;
10129 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10130 loc += 4;
10131 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10132 loc += 4;
10133 }
10134 else
10135 {
10136 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10137 loc += 4;
10138 }
10139
10140 if (PPC_HA (r2off) != 0)
10141 {
10142 size += 4;
10143 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10144 loc += 4;
10145 }
10146 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10147 }
10148 loc += 4;
10149 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10150 loc += 4;
10151 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10152 break;
10153
10154 case ppc_stub_plt_call:
10155 case ppc_stub_plt_call_r2save:
10156 if (stub_entry->h != NULL
10157 && stub_entry->h->is_func_descriptor
10158 && stub_entry->h->oh != NULL)
10159 {
10160 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10161
10162 /* If the old-ABI "dot-symbol" is undefined make it weak so
10163 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10164 FIXME: We used to define the symbol on one of the call
10165 stubs instead, which is why we test symbol section id
10166 against htab->top_id in various places. Likely all
10167 these checks could now disappear. */
10168 if (fh->elf.root.type == bfd_link_hash_undefined)
10169 fh->elf.root.type = bfd_link_hash_undefweak;
10170 /* Stop undo_symbol_twiddle changing it back to undefined. */
10171 fh->was_undefined = 0;
10172 }
10173
10174 /* Now build the stub. */
10175 dest = stub_entry->plt_ent->plt.offset & ~1;
10176 if (dest >= (bfd_vma) -2)
10177 abort ();
10178
10179 plt = htab->plt;
10180 if (!htab->elf.dynamic_sections_created
10181 || stub_entry->h == NULL
10182 || stub_entry->h->elf.dynindx == -1)
10183 plt = htab->iplt;
10184
10185 dest += plt->output_offset + plt->output_section->vma;
10186
10187 if (stub_entry->h == NULL
10188 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10189 {
10190 Elf_Internal_Rela rela;
10191 bfd_byte *rl;
10192
10193 rela.r_offset = dest;
10194 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10195 rela.r_addend = (stub_entry->target_value
10196 + stub_entry->target_section->output_offset
10197 + stub_entry->target_section->output_section->vma);
10198
10199 rl = (htab->reliplt->contents
10200 + (htab->reliplt->reloc_count++
10201 * sizeof (Elf64_External_Rela)));
10202 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10203 stub_entry->plt_ent->plt.offset |= 1;
10204 }
10205
10206 off = (dest
10207 - elf_gp (plt->output_section->owner)
10208 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10209
10210 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10211 {
10212 info->callbacks->einfo
10213 (_("%P: linkage table error against `%s'\n"),
10214 stub_entry->h != NULL
10215 ? stub_entry->h->elf.root.root.string
10216 : "<local sym>");
10217 bfd_set_error (bfd_error_bad_value);
10218 htab->stub_error = TRUE;
10219 return FALSE;
10220 }
10221
10222 if (htab->plt_stub_align != 0)
10223 {
10224 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10225
10226 stub_entry->stub_sec->size += pad;
10227 stub_entry->stub_offset = stub_entry->stub_sec->size;
10228 loc += pad;
10229 }
10230
10231 r = NULL;
10232 if (info->emitrelocations)
10233 {
10234 r = get_relocs (stub_entry->stub_sec,
10235 (2
10236 + (PPC_HA (off) != 0)
10237 + (htab->plt_static_chain
10238 && PPC_HA (off + 16) == PPC_HA (off))));
10239 if (r == NULL)
10240 return FALSE;
10241 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10242 if (bfd_big_endian (info->output_bfd))
10243 r[0].r_offset += 2;
10244 r[0].r_addend = dest;
10245 }
10246 if (stub_entry->h != NULL
10247 && (stub_entry->h == htab->tls_get_addr_fd
10248 || stub_entry->h == htab->tls_get_addr)
10249 && !htab->no_tls_get_addr_opt)
10250 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10251 else
10252 p = build_plt_stub (htab, stub_entry, loc, off, r);
10253 size = p - loc;
10254 break;
10255
10256 default:
10257 BFD_FAIL ();
10258 return FALSE;
10259 }
10260
10261 stub_entry->stub_sec->size += size;
10262
10263 if (htab->emit_stub_syms)
10264 {
10265 struct elf_link_hash_entry *h;
10266 size_t len1, len2;
10267 char *name;
10268 const char *const stub_str[] = { "long_branch",
10269 "long_branch_r2off",
10270 "plt_branch",
10271 "plt_branch_r2off",
10272 "plt_call",
10273 "plt_call" };
10274
10275 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10276 len2 = strlen (stub_entry->root.string);
10277 name = bfd_malloc (len1 + len2 + 2);
10278 if (name == NULL)
10279 return FALSE;
10280 memcpy (name, stub_entry->root.string, 9);
10281 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10282 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10283 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10284 if (h == NULL)
10285 return FALSE;
10286 if (h->root.type == bfd_link_hash_new)
10287 {
10288 h->root.type = bfd_link_hash_defined;
10289 h->root.u.def.section = stub_entry->stub_sec;
10290 h->root.u.def.value = stub_entry->stub_offset;
10291 h->ref_regular = 1;
10292 h->def_regular = 1;
10293 h->ref_regular_nonweak = 1;
10294 h->forced_local = 1;
10295 h->non_elf = 0;
10296 }
10297 }
10298
10299 return TRUE;
10300 }
10301
10302 /* As above, but don't actually build the stub. Just bump offset so
10303 we know stub section sizes, and select plt_branch stubs where
10304 long_branch stubs won't do. */
10305
10306 static bfd_boolean
10307 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10308 {
10309 struct ppc_stub_hash_entry *stub_entry;
10310 struct bfd_link_info *info;
10311 struct ppc_link_hash_table *htab;
10312 bfd_vma off;
10313 int size;
10314
10315 /* Massage our args to the form they really have. */
10316 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10317 info = in_arg;
10318
10319 htab = ppc_hash_table (info);
10320 if (htab == NULL)
10321 return FALSE;
10322
10323 if (stub_entry->stub_type == ppc_stub_plt_call
10324 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10325 {
10326 asection *plt;
10327 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10328 if (off >= (bfd_vma) -2)
10329 abort ();
10330 plt = htab->plt;
10331 if (!htab->elf.dynamic_sections_created
10332 || stub_entry->h == NULL
10333 || stub_entry->h->elf.dynindx == -1)
10334 plt = htab->iplt;
10335 off += (plt->output_offset
10336 + plt->output_section->vma
10337 - elf_gp (plt->output_section->owner)
10338 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10339
10340 size = plt_stub_size (htab, stub_entry, off);
10341 if (htab->plt_stub_align)
10342 size += plt_stub_pad (htab, stub_entry, off);
10343 if (info->emitrelocations)
10344 {
10345 stub_entry->stub_sec->reloc_count
10346 += (2
10347 + (PPC_HA (off) != 0)
10348 + (htab->plt_static_chain
10349 && PPC_HA (off + 16) == PPC_HA (off)));
10350 stub_entry->stub_sec->flags |= SEC_RELOC;
10351 }
10352 }
10353 else
10354 {
10355 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10356 variants. */
10357 bfd_vma r2off = 0;
10358
10359 off = (stub_entry->target_value
10360 + stub_entry->target_section->output_offset
10361 + stub_entry->target_section->output_section->vma);
10362 off -= (stub_entry->stub_sec->size
10363 + stub_entry->stub_sec->output_offset
10364 + stub_entry->stub_sec->output_section->vma);
10365
10366 /* Reset the stub type from the plt variant in case we now
10367 can reach with a shorter stub. */
10368 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10369 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10370
10371 size = 4;
10372 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10373 {
10374 r2off = get_r2off (info, stub_entry);
10375 if (r2off == 0)
10376 {
10377 htab->stub_error = TRUE;
10378 return FALSE;
10379 }
10380 size = 12;
10381 if (PPC_HA (r2off) != 0)
10382 size = 16;
10383 off -= size - 4;
10384 }
10385
10386 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10387 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10388 {
10389 struct ppc_branch_hash_entry *br_entry;
10390
10391 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10392 stub_entry->root.string + 9,
10393 TRUE, FALSE);
10394 if (br_entry == NULL)
10395 {
10396 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10397 stub_entry->root.string);
10398 htab->stub_error = TRUE;
10399 return FALSE;
10400 }
10401
10402 if (br_entry->iter != htab->stub_iteration)
10403 {
10404 br_entry->iter = htab->stub_iteration;
10405 br_entry->offset = htab->brlt->size;
10406 htab->brlt->size += 8;
10407
10408 if (htab->relbrlt != NULL)
10409 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10410 else if (info->emitrelocations)
10411 {
10412 htab->brlt->reloc_count += 1;
10413 htab->brlt->flags |= SEC_RELOC;
10414 }
10415 }
10416
10417 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10418 off = (br_entry->offset
10419 + htab->brlt->output_offset
10420 + htab->brlt->output_section->vma
10421 - elf_gp (htab->brlt->output_section->owner)
10422 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10423
10424 if (info->emitrelocations)
10425 {
10426 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10427 stub_entry->stub_sec->flags |= SEC_RELOC;
10428 }
10429
10430 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10431 {
10432 size = 12;
10433 if (PPC_HA (off) != 0)
10434 size = 16;
10435 }
10436 else
10437 {
10438 size = 20;
10439 if (PPC_HA (off) != 0)
10440 size += 4;
10441
10442 if (PPC_HA (r2off) != 0)
10443 size += 4;
10444 }
10445 }
10446 else if (info->emitrelocations)
10447 {
10448 stub_entry->stub_sec->reloc_count += 1;
10449 stub_entry->stub_sec->flags |= SEC_RELOC;
10450 }
10451 }
10452
10453 stub_entry->stub_sec->size += size;
10454 return TRUE;
10455 }
10456
10457 /* Set up various things so that we can make a list of input sections
10458 for each output section included in the link. Returns -1 on error,
10459 0 when no stubs will be needed, and 1 on success. */
10460
10461 int
10462 ppc64_elf_setup_section_lists
10463 (struct bfd_link_info *info,
10464 asection *(*add_stub_section) (const char *, asection *),
10465 void (*layout_sections_again) (void))
10466 {
10467 bfd *input_bfd;
10468 int top_id, top_index, id;
10469 asection *section;
10470 asection **input_list;
10471 bfd_size_type amt;
10472 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10473
10474 if (htab == NULL)
10475 return -1;
10476 /* Stash our params away. */
10477 htab->add_stub_section = add_stub_section;
10478 htab->layout_sections_again = layout_sections_again;
10479
10480 if (htab->brlt == NULL)
10481 return 0;
10482
10483 /* Find the top input section id. */
10484 for (input_bfd = info->input_bfds, top_id = 3;
10485 input_bfd != NULL;
10486 input_bfd = input_bfd->link_next)
10487 {
10488 for (section = input_bfd->sections;
10489 section != NULL;
10490 section = section->next)
10491 {
10492 if (top_id < section->id)
10493 top_id = section->id;
10494 }
10495 }
10496
10497 htab->top_id = top_id;
10498 amt = sizeof (struct map_stub) * (top_id + 1);
10499 htab->stub_group = bfd_zmalloc (amt);
10500 if (htab->stub_group == NULL)
10501 return -1;
10502
10503 /* Set toc_off for com, und, abs and ind sections. */
10504 for (id = 0; id < 3; id++)
10505 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10506
10507 /* We can't use output_bfd->section_count here to find the top output
10508 section index as some sections may have been removed, and
10509 strip_excluded_output_sections doesn't renumber the indices. */
10510 for (section = info->output_bfd->sections, top_index = 0;
10511 section != NULL;
10512 section = section->next)
10513 {
10514 if (top_index < section->index)
10515 top_index = section->index;
10516 }
10517
10518 htab->top_index = top_index;
10519 amt = sizeof (asection *) * (top_index + 1);
10520 input_list = bfd_zmalloc (amt);
10521 htab->input_list = input_list;
10522 if (input_list == NULL)
10523 return -1;
10524
10525 return 1;
10526 }
10527
10528 /* Set up for first pass at multitoc partitioning. */
10529
10530 void
10531 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10532 {
10533 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10534
10535 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10536 htab->toc_curr = elf_gp (info->output_bfd);
10537 htab->toc_bfd = NULL;
10538 htab->toc_first_sec = NULL;
10539 }
10540
10541 /* The linker repeatedly calls this function for each TOC input section
10542 and linker generated GOT section. Group input bfds such that the toc
10543 within a group is less than 64k in size. */
10544
10545 bfd_boolean
10546 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10547 {
10548 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10549 bfd_vma addr, off, limit;
10550
10551 if (htab == NULL)
10552 return FALSE;
10553
10554 if (!htab->second_toc_pass)
10555 {
10556 /* Keep track of the first .toc or .got section for this input bfd. */
10557 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10558
10559 if (new_bfd)
10560 {
10561 htab->toc_bfd = isec->owner;
10562 htab->toc_first_sec = isec;
10563 }
10564
10565 addr = isec->output_offset + isec->output_section->vma;
10566 off = addr - htab->toc_curr;
10567 limit = 0x80008000;
10568 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10569 limit = 0x10000;
10570 if (off + isec->size > limit)
10571 {
10572 addr = (htab->toc_first_sec->output_offset
10573 + htab->toc_first_sec->output_section->vma);
10574 htab->toc_curr = addr;
10575 }
10576
10577 /* toc_curr is the base address of this toc group. Set elf_gp
10578 for the input section to be the offset relative to the
10579 output toc base plus 0x8000. Making the input elf_gp an
10580 offset allows us to move the toc as a whole without
10581 recalculating input elf_gp. */
10582 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10583 off += TOC_BASE_OFF;
10584
10585 /* Die if someone uses a linker script that doesn't keep input
10586 file .toc and .got together. */
10587 if (new_bfd
10588 && elf_gp (isec->owner) != 0
10589 && elf_gp (isec->owner) != off)
10590 return FALSE;
10591
10592 elf_gp (isec->owner) = off;
10593 return TRUE;
10594 }
10595
10596 /* During the second pass toc_first_sec points to the start of
10597 a toc group, and toc_curr is used to track the old elf_gp.
10598 We use toc_bfd to ensure we only look at each bfd once. */
10599 if (htab->toc_bfd == isec->owner)
10600 return TRUE;
10601 htab->toc_bfd = isec->owner;
10602
10603 if (htab->toc_first_sec == NULL
10604 || htab->toc_curr != elf_gp (isec->owner))
10605 {
10606 htab->toc_curr = elf_gp (isec->owner);
10607 htab->toc_first_sec = isec;
10608 }
10609 addr = (htab->toc_first_sec->output_offset
10610 + htab->toc_first_sec->output_section->vma);
10611 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10612 elf_gp (isec->owner) = off;
10613
10614 return TRUE;
10615 }
10616
10617 /* Called via elf_link_hash_traverse to merge GOT entries for global
10618 symbol H. */
10619
10620 static bfd_boolean
10621 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10622 {
10623 if (h->root.type == bfd_link_hash_indirect)
10624 return TRUE;
10625
10626 merge_got_entries (&h->got.glist);
10627
10628 return TRUE;
10629 }
10630
10631 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10632 symbol H. */
10633
10634 static bfd_boolean
10635 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10636 {
10637 struct got_entry *gent;
10638
10639 if (h->root.type == bfd_link_hash_indirect)
10640 return TRUE;
10641
10642 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10643 if (!gent->is_indirect)
10644 allocate_got (h, (struct bfd_link_info *) inf, gent);
10645 return TRUE;
10646 }
10647
10648 /* Called on the first multitoc pass after the last call to
10649 ppc64_elf_next_toc_section. This function removes duplicate GOT
10650 entries. */
10651
10652 bfd_boolean
10653 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10654 {
10655 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10656 struct bfd *ibfd, *ibfd2;
10657 bfd_boolean done_something;
10658
10659 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10660
10661 if (!htab->do_multi_toc)
10662 return FALSE;
10663
10664 /* Merge global sym got entries within a toc group. */
10665 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10666
10667 /* And tlsld_got. */
10668 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10669 {
10670 struct got_entry *ent, *ent2;
10671
10672 if (!is_ppc64_elf (ibfd))
10673 continue;
10674
10675 ent = ppc64_tlsld_got (ibfd);
10676 if (!ent->is_indirect
10677 && ent->got.offset != (bfd_vma) -1)
10678 {
10679 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10680 {
10681 if (!is_ppc64_elf (ibfd2))
10682 continue;
10683
10684 ent2 = ppc64_tlsld_got (ibfd2);
10685 if (!ent2->is_indirect
10686 && ent2->got.offset != (bfd_vma) -1
10687 && elf_gp (ibfd2) == elf_gp (ibfd))
10688 {
10689 ent2->is_indirect = TRUE;
10690 ent2->got.ent = ent;
10691 }
10692 }
10693 }
10694 }
10695
10696 /* Zap sizes of got sections. */
10697 htab->reliplt->rawsize = htab->reliplt->size;
10698 htab->reliplt->size -= htab->got_reli_size;
10699 htab->got_reli_size = 0;
10700
10701 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10702 {
10703 asection *got, *relgot;
10704
10705 if (!is_ppc64_elf (ibfd))
10706 continue;
10707
10708 got = ppc64_elf_tdata (ibfd)->got;
10709 if (got != NULL)
10710 {
10711 got->rawsize = got->size;
10712 got->size = 0;
10713 relgot = ppc64_elf_tdata (ibfd)->relgot;
10714 relgot->rawsize = relgot->size;
10715 relgot->size = 0;
10716 }
10717 }
10718
10719 /* Now reallocate the got, local syms first. We don't need to
10720 allocate section contents again since we never increase size. */
10721 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10722 {
10723 struct got_entry **lgot_ents;
10724 struct got_entry **end_lgot_ents;
10725 struct plt_entry **local_plt;
10726 struct plt_entry **end_local_plt;
10727 unsigned char *lgot_masks;
10728 bfd_size_type locsymcount;
10729 Elf_Internal_Shdr *symtab_hdr;
10730 asection *s, *srel;
10731
10732 if (!is_ppc64_elf (ibfd))
10733 continue;
10734
10735 lgot_ents = elf_local_got_ents (ibfd);
10736 if (!lgot_ents)
10737 continue;
10738
10739 symtab_hdr = &elf_symtab_hdr (ibfd);
10740 locsymcount = symtab_hdr->sh_info;
10741 end_lgot_ents = lgot_ents + locsymcount;
10742 local_plt = (struct plt_entry **) end_lgot_ents;
10743 end_local_plt = local_plt + locsymcount;
10744 lgot_masks = (unsigned char *) end_local_plt;
10745 s = ppc64_elf_tdata (ibfd)->got;
10746 srel = ppc64_elf_tdata (ibfd)->relgot;
10747 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10748 {
10749 struct got_entry *ent;
10750
10751 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10752 {
10753 unsigned int num = 1;
10754 ent->got.offset = s->size;
10755 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10756 num = 2;
10757 s->size += num * 8;
10758 if (info->shared)
10759 srel->size += num * sizeof (Elf64_External_Rela);
10760 else if ((*lgot_masks & PLT_IFUNC) != 0)
10761 {
10762 htab->reliplt->size
10763 += num * sizeof (Elf64_External_Rela);
10764 htab->got_reli_size
10765 += num * sizeof (Elf64_External_Rela);
10766 }
10767 }
10768 }
10769 }
10770
10771 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10772
10773 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10774 {
10775 struct got_entry *ent;
10776
10777 if (!is_ppc64_elf (ibfd))
10778 continue;
10779
10780 ent = ppc64_tlsld_got (ibfd);
10781 if (!ent->is_indirect
10782 && ent->got.offset != (bfd_vma) -1)
10783 {
10784 asection *s = ppc64_elf_tdata (ibfd)->got;
10785 ent->got.offset = s->size;
10786 s->size += 16;
10787 if (info->shared)
10788 {
10789 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10790 srel->size += sizeof (Elf64_External_Rela);
10791 }
10792 }
10793 }
10794
10795 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10796 if (!done_something)
10797 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10798 {
10799 asection *got;
10800
10801 if (!is_ppc64_elf (ibfd))
10802 continue;
10803
10804 got = ppc64_elf_tdata (ibfd)->got;
10805 if (got != NULL)
10806 {
10807 done_something = got->rawsize != got->size;
10808 if (done_something)
10809 break;
10810 }
10811 }
10812
10813 if (done_something)
10814 (*htab->layout_sections_again) ();
10815
10816 /* Set up for second pass over toc sections to recalculate elf_gp
10817 on input sections. */
10818 htab->toc_bfd = NULL;
10819 htab->toc_first_sec = NULL;
10820 htab->second_toc_pass = TRUE;
10821 return done_something;
10822 }
10823
10824 /* Called after second pass of multitoc partitioning. */
10825
10826 void
10827 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10828 {
10829 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10830
10831 /* After the second pass, toc_curr tracks the TOC offset used
10832 for code sections below in ppc64_elf_next_input_section. */
10833 htab->toc_curr = TOC_BASE_OFF;
10834 }
10835
10836 /* No toc references were found in ISEC. If the code in ISEC makes no
10837 calls, then there's no need to use toc adjusting stubs when branching
10838 into ISEC. Actually, indirect calls from ISEC are OK as they will
10839 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10840 needed, and 2 if a cyclical call-graph was found but no other reason
10841 for a stub was detected. If called from the top level, a return of
10842 2 means the same as a return of 0. */
10843
10844 static int
10845 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10846 {
10847 int ret;
10848
10849 /* Mark this section as checked. */
10850 isec->call_check_done = 1;
10851
10852 /* We know none of our code bearing sections will need toc stubs. */
10853 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10854 return 0;
10855
10856 if (isec->size == 0)
10857 return 0;
10858
10859 if (isec->output_section == NULL)
10860 return 0;
10861
10862 ret = 0;
10863 if (isec->reloc_count != 0)
10864 {
10865 Elf_Internal_Rela *relstart, *rel;
10866 Elf_Internal_Sym *local_syms;
10867 struct ppc_link_hash_table *htab;
10868
10869 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10870 info->keep_memory);
10871 if (relstart == NULL)
10872 return -1;
10873
10874 /* Look for branches to outside of this section. */
10875 local_syms = NULL;
10876 htab = ppc_hash_table (info);
10877 if (htab == NULL)
10878 return -1;
10879
10880 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10881 {
10882 enum elf_ppc64_reloc_type r_type;
10883 unsigned long r_symndx;
10884 struct elf_link_hash_entry *h;
10885 struct ppc_link_hash_entry *eh;
10886 Elf_Internal_Sym *sym;
10887 asection *sym_sec;
10888 struct _opd_sec_data *opd;
10889 bfd_vma sym_value;
10890 bfd_vma dest;
10891
10892 r_type = ELF64_R_TYPE (rel->r_info);
10893 if (r_type != R_PPC64_REL24
10894 && r_type != R_PPC64_REL14
10895 && r_type != R_PPC64_REL14_BRTAKEN
10896 && r_type != R_PPC64_REL14_BRNTAKEN)
10897 continue;
10898
10899 r_symndx = ELF64_R_SYM (rel->r_info);
10900 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10901 isec->owner))
10902 {
10903 ret = -1;
10904 break;
10905 }
10906
10907 /* Calls to dynamic lib functions go through a plt call stub
10908 that uses r2. */
10909 eh = (struct ppc_link_hash_entry *) h;
10910 if (eh != NULL
10911 && (eh->elf.plt.plist != NULL
10912 || (eh->oh != NULL
10913 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10914 {
10915 ret = 1;
10916 break;
10917 }
10918
10919 if (sym_sec == NULL)
10920 /* Ignore other undefined symbols. */
10921 continue;
10922
10923 /* Assume branches to other sections not included in the
10924 link need stubs too, to cover -R and absolute syms. */
10925 if (sym_sec->output_section == NULL)
10926 {
10927 ret = 1;
10928 break;
10929 }
10930
10931 if (h == NULL)
10932 sym_value = sym->st_value;
10933 else
10934 {
10935 if (h->root.type != bfd_link_hash_defined
10936 && h->root.type != bfd_link_hash_defweak)
10937 abort ();
10938 sym_value = h->root.u.def.value;
10939 }
10940 sym_value += rel->r_addend;
10941
10942 /* If this branch reloc uses an opd sym, find the code section. */
10943 opd = get_opd_info (sym_sec);
10944 if (opd != NULL)
10945 {
10946 if (h == NULL && opd->adjust != NULL)
10947 {
10948 long adjust;
10949
10950 adjust = opd->adjust[sym->st_value / 8];
10951 if (adjust == -1)
10952 /* Assume deleted functions won't ever be called. */
10953 continue;
10954 sym_value += adjust;
10955 }
10956
10957 dest = opd_entry_value (sym_sec, sym_value,
10958 &sym_sec, NULL, FALSE);
10959 if (dest == (bfd_vma) -1)
10960 continue;
10961 }
10962 else
10963 dest = (sym_value
10964 + sym_sec->output_offset
10965 + sym_sec->output_section->vma);
10966
10967 /* Ignore branch to self. */
10968 if (sym_sec == isec)
10969 continue;
10970
10971 /* If the called function uses the toc, we need a stub. */
10972 if (sym_sec->has_toc_reloc
10973 || sym_sec->makes_toc_func_call)
10974 {
10975 ret = 1;
10976 break;
10977 }
10978
10979 /* Assume any branch that needs a long branch stub might in fact
10980 need a plt_branch stub. A plt_branch stub uses r2. */
10981 else if (dest - (isec->output_offset
10982 + isec->output_section->vma
10983 + rel->r_offset) + (1 << 25) >= (2 << 25))
10984 {
10985 ret = 1;
10986 break;
10987 }
10988
10989 /* If calling back to a section in the process of being
10990 tested, we can't say for sure that no toc adjusting stubs
10991 are needed, so don't return zero. */
10992 else if (sym_sec->call_check_in_progress)
10993 ret = 2;
10994
10995 /* Branches to another section that itself doesn't have any TOC
10996 references are OK. Recursively call ourselves to check. */
10997 else if (!sym_sec->call_check_done)
10998 {
10999 int recur;
11000
11001 /* Mark current section as indeterminate, so that other
11002 sections that call back to current won't be marked as
11003 known. */
11004 isec->call_check_in_progress = 1;
11005 recur = toc_adjusting_stub_needed (info, sym_sec);
11006 isec->call_check_in_progress = 0;
11007
11008 if (recur != 0)
11009 {
11010 ret = recur;
11011 if (recur != 2)
11012 break;
11013 }
11014 }
11015 }
11016
11017 if (local_syms != NULL
11018 && (elf_symtab_hdr (isec->owner).contents
11019 != (unsigned char *) local_syms))
11020 free (local_syms);
11021 if (elf_section_data (isec)->relocs != relstart)
11022 free (relstart);
11023 }
11024
11025 if ((ret & 1) == 0
11026 && isec->map_head.s != NULL
11027 && (strcmp (isec->output_section->name, ".init") == 0
11028 || strcmp (isec->output_section->name, ".fini") == 0))
11029 {
11030 if (isec->map_head.s->has_toc_reloc
11031 || isec->map_head.s->makes_toc_func_call)
11032 ret = 1;
11033 else if (!isec->map_head.s->call_check_done)
11034 {
11035 int recur;
11036 isec->call_check_in_progress = 1;
11037 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11038 isec->call_check_in_progress = 0;
11039 if (recur != 0)
11040 ret = recur;
11041 }
11042 }
11043
11044 if (ret == 1)
11045 isec->makes_toc_func_call = 1;
11046
11047 return ret;
11048 }
11049
11050 /* The linker repeatedly calls this function for each input section,
11051 in the order that input sections are linked into output sections.
11052 Build lists of input sections to determine groupings between which
11053 we may insert linker stubs. */
11054
11055 bfd_boolean
11056 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11057 {
11058 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11059
11060 if (htab == NULL)
11061 return FALSE;
11062
11063 if ((isec->output_section->flags & SEC_CODE) != 0
11064 && isec->output_section->index <= htab->top_index)
11065 {
11066 asection **list = htab->input_list + isec->output_section->index;
11067 /* Steal the link_sec pointer for our list. */
11068 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11069 /* This happens to make the list in reverse order,
11070 which is what we want. */
11071 PREV_SEC (isec) = *list;
11072 *list = isec;
11073 }
11074
11075 if (htab->multi_toc_needed)
11076 {
11077 /* If a code section has a function that uses the TOC then we need
11078 to use the right TOC (obviously). Also, make sure that .opd gets
11079 the correct TOC value for R_PPC64_TOC relocs that don't have or
11080 can't find their function symbol (shouldn't ever happen now).
11081 Also specially treat .fixup for the linux kernel. .fixup
11082 contains branches, but only back to the function that hit an
11083 exception. */
11084 if (isec->has_toc_reloc
11085 || (isec->flags & SEC_CODE) == 0
11086 || strcmp (isec->name, ".fixup") == 0)
11087 {
11088 if (elf_gp (isec->owner) != 0)
11089 htab->toc_curr = elf_gp (isec->owner);
11090 }
11091 else
11092 {
11093 if (!isec->call_check_done
11094 && toc_adjusting_stub_needed (info, isec) < 0)
11095 return FALSE;
11096 /* If we make a local call from this section, ie. a branch
11097 without a following nop, then we have no place to put a
11098 toc restoring insn. We must use the same toc group as
11099 the callee.
11100 Testing makes_toc_func_call actually tests for *any*
11101 calls to functions that need a good toc pointer. A more
11102 precise test would be better, as this one will set
11103 incorrect values for pasted .init/.fini fragments.
11104 (Fixed later in check_pasted_section.) */
11105 if (isec->makes_toc_func_call
11106 && elf_gp (isec->owner) != 0)
11107 htab->toc_curr = elf_gp (isec->owner);
11108 }
11109 }
11110
11111 /* Functions that don't use the TOC can belong in any TOC group.
11112 Use the last TOC base. */
11113 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11114 return TRUE;
11115 }
11116
11117 /* Check that all .init and .fini sections use the same toc, if they
11118 have toc relocs. */
11119
11120 static bfd_boolean
11121 check_pasted_section (struct bfd_link_info *info, const char *name)
11122 {
11123 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11124
11125 if (o != NULL)
11126 {
11127 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11128 bfd_vma toc_off = 0;
11129 asection *i;
11130
11131 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11132 if (i->has_toc_reloc)
11133 {
11134 if (toc_off == 0)
11135 toc_off = htab->stub_group[i->id].toc_off;
11136 else if (toc_off != htab->stub_group[i->id].toc_off)
11137 return FALSE;
11138 }
11139
11140 if (toc_off == 0)
11141 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11142 if (i->makes_toc_func_call)
11143 {
11144 toc_off = htab->stub_group[i->id].toc_off;
11145 break;
11146 }
11147
11148 /* Make sure the whole pasted function uses the same toc offset. */
11149 if (toc_off != 0)
11150 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11151 htab->stub_group[i->id].toc_off = toc_off;
11152 }
11153 return TRUE;
11154 }
11155
11156 bfd_boolean
11157 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11158 {
11159 return (check_pasted_section (info, ".init")
11160 & check_pasted_section (info, ".fini"));
11161 }
11162
11163 /* See whether we can group stub sections together. Grouping stub
11164 sections may result in fewer stubs. More importantly, we need to
11165 put all .init* and .fini* stubs at the beginning of the .init or
11166 .fini output sections respectively, because glibc splits the
11167 _init and _fini functions into multiple parts. Putting a stub in
11168 the middle of a function is not a good idea. */
11169
11170 static void
11171 group_sections (struct ppc_link_hash_table *htab,
11172 bfd_size_type stub_group_size,
11173 bfd_boolean stubs_always_before_branch)
11174 {
11175 asection **list;
11176 bfd_size_type stub14_group_size;
11177 bfd_boolean suppress_size_errors;
11178
11179 suppress_size_errors = FALSE;
11180 stub14_group_size = stub_group_size;
11181 if (stub_group_size == 1)
11182 {
11183 /* Default values. */
11184 if (stubs_always_before_branch)
11185 {
11186 stub_group_size = 0x1e00000;
11187 stub14_group_size = 0x7800;
11188 }
11189 else
11190 {
11191 stub_group_size = 0x1c00000;
11192 stub14_group_size = 0x7000;
11193 }
11194 suppress_size_errors = TRUE;
11195 }
11196
11197 list = htab->input_list + htab->top_index;
11198 do
11199 {
11200 asection *tail = *list;
11201 while (tail != NULL)
11202 {
11203 asection *curr;
11204 asection *prev;
11205 bfd_size_type total;
11206 bfd_boolean big_sec;
11207 bfd_vma curr_toc;
11208
11209 curr = tail;
11210 total = tail->size;
11211 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11212 && ppc64_elf_section_data (tail)->has_14bit_branch
11213 ? stub14_group_size : stub_group_size);
11214 if (big_sec && !suppress_size_errors)
11215 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11216 tail->owner, tail);
11217 curr_toc = htab->stub_group[tail->id].toc_off;
11218
11219 while ((prev = PREV_SEC (curr)) != NULL
11220 && ((total += curr->output_offset - prev->output_offset)
11221 < (ppc64_elf_section_data (prev) != NULL
11222 && ppc64_elf_section_data (prev)->has_14bit_branch
11223 ? stub14_group_size : stub_group_size))
11224 && htab->stub_group[prev->id].toc_off == curr_toc)
11225 curr = prev;
11226
11227 /* OK, the size from the start of CURR to the end is less
11228 than stub_group_size and thus can be handled by one stub
11229 section. (or the tail section is itself larger than
11230 stub_group_size, in which case we may be toast.) We
11231 should really be keeping track of the total size of stubs
11232 added here, as stubs contribute to the final output
11233 section size. That's a little tricky, and this way will
11234 only break if stubs added make the total size more than
11235 2^25, ie. for the default stub_group_size, if stubs total
11236 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11237 do
11238 {
11239 prev = PREV_SEC (tail);
11240 /* Set up this stub group. */
11241 htab->stub_group[tail->id].link_sec = curr;
11242 }
11243 while (tail != curr && (tail = prev) != NULL);
11244
11245 /* But wait, there's more! Input sections up to stub_group_size
11246 bytes before the stub section can be handled by it too.
11247 Don't do this if we have a really large section after the
11248 stubs, as adding more stubs increases the chance that
11249 branches may not reach into the stub section. */
11250 if (!stubs_always_before_branch && !big_sec)
11251 {
11252 total = 0;
11253 while (prev != NULL
11254 && ((total += tail->output_offset - prev->output_offset)
11255 < (ppc64_elf_section_data (prev) != NULL
11256 && ppc64_elf_section_data (prev)->has_14bit_branch
11257 ? stub14_group_size : stub_group_size))
11258 && htab->stub_group[prev->id].toc_off == curr_toc)
11259 {
11260 tail = prev;
11261 prev = PREV_SEC (tail);
11262 htab->stub_group[tail->id].link_sec = curr;
11263 }
11264 }
11265 tail = prev;
11266 }
11267 }
11268 while (list-- != htab->input_list);
11269 free (htab->input_list);
11270 #undef PREV_SEC
11271 }
11272
11273 static const unsigned char glink_eh_frame_cie[] =
11274 {
11275 0, 0, 0, 16, /* length. */
11276 0, 0, 0, 0, /* id. */
11277 1, /* CIE version. */
11278 'z', 'R', 0, /* Augmentation string. */
11279 4, /* Code alignment. */
11280 0x78, /* Data alignment. */
11281 65, /* RA reg. */
11282 1, /* Augmentation size. */
11283 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11284 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11285 };
11286
11287 /* Stripping output sections is normally done before dynamic section
11288 symbols have been allocated. This function is called later, and
11289 handles cases like htab->brlt which is mapped to its own output
11290 section. */
11291
11292 static void
11293 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11294 {
11295 if (isec->size == 0
11296 && isec->output_section->size == 0
11297 && !bfd_section_removed_from_list (info->output_bfd,
11298 isec->output_section)
11299 && elf_section_data (isec->output_section)->dynindx == 0)
11300 {
11301 isec->output_section->flags |= SEC_EXCLUDE;
11302 bfd_section_list_remove (info->output_bfd, isec->output_section);
11303 info->output_bfd->section_count--;
11304 }
11305 }
11306
11307 /* Determine and set the size of the stub section for a final link.
11308
11309 The basic idea here is to examine all the relocations looking for
11310 PC-relative calls to a target that is unreachable with a "bl"
11311 instruction. */
11312
11313 bfd_boolean
11314 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11315 bfd_boolean plt_static_chain, int plt_thread_safe,
11316 int plt_stub_align)
11317 {
11318 bfd_size_type stub_group_size;
11319 bfd_boolean stubs_always_before_branch;
11320 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11321
11322 if (htab == NULL)
11323 return FALSE;
11324
11325 htab->plt_static_chain = plt_static_chain;
11326 htab->plt_stub_align = plt_stub_align;
11327 if (plt_thread_safe == -1)
11328 {
11329 const char *const thread_starter[] =
11330 {
11331 "pthread_create",
11332 /* libstdc++ */
11333 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11334 /* librt */
11335 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11336 "mq_notify", "create_timer",
11337 /* libanl */
11338 "getaddrinfo_a",
11339 /* libgomp */
11340 "GOMP_parallel_start",
11341 "GOMP_parallel_loop_static_start",
11342 "GOMP_parallel_loop_dynamic_start",
11343 "GOMP_parallel_loop_guided_start",
11344 "GOMP_parallel_loop_runtime_start",
11345 "GOMP_parallel_sections_start",
11346 };
11347 unsigned i;
11348
11349 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11350 {
11351 struct elf_link_hash_entry *h;
11352 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11353 FALSE, FALSE, TRUE);
11354 plt_thread_safe = h != NULL && h->ref_regular;
11355 if (plt_thread_safe)
11356 break;
11357 }
11358 }
11359 htab->plt_thread_safe = plt_thread_safe;
11360 stubs_always_before_branch = group_size < 0;
11361 if (group_size < 0)
11362 stub_group_size = -group_size;
11363 else
11364 stub_group_size = group_size;
11365
11366 group_sections (htab, stub_group_size, stubs_always_before_branch);
11367
11368 while (1)
11369 {
11370 bfd *input_bfd;
11371 unsigned int bfd_indx;
11372 asection *stub_sec;
11373
11374 htab->stub_iteration += 1;
11375
11376 for (input_bfd = info->input_bfds, bfd_indx = 0;
11377 input_bfd != NULL;
11378 input_bfd = input_bfd->link_next, bfd_indx++)
11379 {
11380 Elf_Internal_Shdr *symtab_hdr;
11381 asection *section;
11382 Elf_Internal_Sym *local_syms = NULL;
11383
11384 if (!is_ppc64_elf (input_bfd))
11385 continue;
11386
11387 /* We'll need the symbol table in a second. */
11388 symtab_hdr = &elf_symtab_hdr (input_bfd);
11389 if (symtab_hdr->sh_info == 0)
11390 continue;
11391
11392 /* Walk over each section attached to the input bfd. */
11393 for (section = input_bfd->sections;
11394 section != NULL;
11395 section = section->next)
11396 {
11397 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11398
11399 /* If there aren't any relocs, then there's nothing more
11400 to do. */
11401 if ((section->flags & SEC_RELOC) == 0
11402 || (section->flags & SEC_ALLOC) == 0
11403 || (section->flags & SEC_LOAD) == 0
11404 || (section->flags & SEC_CODE) == 0
11405 || section->reloc_count == 0)
11406 continue;
11407
11408 /* If this section is a link-once section that will be
11409 discarded, then don't create any stubs. */
11410 if (section->output_section == NULL
11411 || section->output_section->owner != info->output_bfd)
11412 continue;
11413
11414 /* Get the relocs. */
11415 internal_relocs
11416 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11417 info->keep_memory);
11418 if (internal_relocs == NULL)
11419 goto error_ret_free_local;
11420
11421 /* Now examine each relocation. */
11422 irela = internal_relocs;
11423 irelaend = irela + section->reloc_count;
11424 for (; irela < irelaend; irela++)
11425 {
11426 enum elf_ppc64_reloc_type r_type;
11427 unsigned int r_indx;
11428 enum ppc_stub_type stub_type;
11429 struct ppc_stub_hash_entry *stub_entry;
11430 asection *sym_sec, *code_sec;
11431 bfd_vma sym_value, code_value;
11432 bfd_vma destination;
11433 bfd_boolean ok_dest;
11434 struct ppc_link_hash_entry *hash;
11435 struct ppc_link_hash_entry *fdh;
11436 struct elf_link_hash_entry *h;
11437 Elf_Internal_Sym *sym;
11438 char *stub_name;
11439 const asection *id_sec;
11440 struct _opd_sec_data *opd;
11441 struct plt_entry *plt_ent;
11442
11443 r_type = ELF64_R_TYPE (irela->r_info);
11444 r_indx = ELF64_R_SYM (irela->r_info);
11445
11446 if (r_type >= R_PPC64_max)
11447 {
11448 bfd_set_error (bfd_error_bad_value);
11449 goto error_ret_free_internal;
11450 }
11451
11452 /* Only look for stubs on branch instructions. */
11453 if (r_type != R_PPC64_REL24
11454 && r_type != R_PPC64_REL14
11455 && r_type != R_PPC64_REL14_BRTAKEN
11456 && r_type != R_PPC64_REL14_BRNTAKEN)
11457 continue;
11458
11459 /* Now determine the call target, its name, value,
11460 section. */
11461 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11462 r_indx, input_bfd))
11463 goto error_ret_free_internal;
11464 hash = (struct ppc_link_hash_entry *) h;
11465
11466 ok_dest = FALSE;
11467 fdh = NULL;
11468 sym_value = 0;
11469 if (hash == NULL)
11470 {
11471 sym_value = sym->st_value;
11472 ok_dest = TRUE;
11473 }
11474 else if (hash->elf.root.type == bfd_link_hash_defined
11475 || hash->elf.root.type == bfd_link_hash_defweak)
11476 {
11477 sym_value = hash->elf.root.u.def.value;
11478 if (sym_sec->output_section != NULL)
11479 ok_dest = TRUE;
11480 }
11481 else if (hash->elf.root.type == bfd_link_hash_undefweak
11482 || hash->elf.root.type == bfd_link_hash_undefined)
11483 {
11484 /* Recognise an old ABI func code entry sym, and
11485 use the func descriptor sym instead if it is
11486 defined. */
11487 if (hash->elf.root.root.string[0] == '.'
11488 && (fdh = lookup_fdh (hash, htab)) != NULL)
11489 {
11490 if (fdh->elf.root.type == bfd_link_hash_defined
11491 || fdh->elf.root.type == bfd_link_hash_defweak)
11492 {
11493 sym_sec = fdh->elf.root.u.def.section;
11494 sym_value = fdh->elf.root.u.def.value;
11495 if (sym_sec->output_section != NULL)
11496 ok_dest = TRUE;
11497 }
11498 else
11499 fdh = NULL;
11500 }
11501 }
11502 else
11503 {
11504 bfd_set_error (bfd_error_bad_value);
11505 goto error_ret_free_internal;
11506 }
11507
11508 destination = 0;
11509 if (ok_dest)
11510 {
11511 sym_value += irela->r_addend;
11512 destination = (sym_value
11513 + sym_sec->output_offset
11514 + sym_sec->output_section->vma);
11515 }
11516
11517 code_sec = sym_sec;
11518 code_value = sym_value;
11519 opd = get_opd_info (sym_sec);
11520 if (opd != NULL)
11521 {
11522 bfd_vma dest;
11523
11524 if (hash == NULL && opd->adjust != NULL)
11525 {
11526 long adjust = opd->adjust[sym_value / 8];
11527 if (adjust == -1)
11528 continue;
11529 code_value += adjust;
11530 sym_value += adjust;
11531 }
11532 dest = opd_entry_value (sym_sec, sym_value,
11533 &code_sec, &code_value, FALSE);
11534 if (dest != (bfd_vma) -1)
11535 {
11536 destination = dest;
11537 if (fdh != NULL)
11538 {
11539 /* Fixup old ABI sym to point at code
11540 entry. */
11541 hash->elf.root.type = bfd_link_hash_defweak;
11542 hash->elf.root.u.def.section = code_sec;
11543 hash->elf.root.u.def.value = code_value;
11544 }
11545 }
11546 }
11547
11548 /* Determine what (if any) linker stub is needed. */
11549 plt_ent = NULL;
11550 stub_type = ppc_type_of_stub (section, irela, &hash,
11551 &plt_ent, destination);
11552
11553 if (stub_type != ppc_stub_plt_call)
11554 {
11555 /* Check whether we need a TOC adjusting stub.
11556 Since the linker pastes together pieces from
11557 different object files when creating the
11558 _init and _fini functions, it may be that a
11559 call to what looks like a local sym is in
11560 fact a call needing a TOC adjustment. */
11561 if (code_sec != NULL
11562 && code_sec->output_section != NULL
11563 && (htab->stub_group[code_sec->id].toc_off
11564 != htab->stub_group[section->id].toc_off)
11565 && (code_sec->has_toc_reloc
11566 || code_sec->makes_toc_func_call))
11567 stub_type = ppc_stub_long_branch_r2off;
11568 }
11569
11570 if (stub_type == ppc_stub_none)
11571 continue;
11572
11573 /* __tls_get_addr calls might be eliminated. */
11574 if (stub_type != ppc_stub_plt_call
11575 && hash != NULL
11576 && (hash == htab->tls_get_addr
11577 || hash == htab->tls_get_addr_fd)
11578 && section->has_tls_reloc
11579 && irela != internal_relocs)
11580 {
11581 /* Get tls info. */
11582 unsigned char *tls_mask;
11583
11584 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11585 irela - 1, input_bfd))
11586 goto error_ret_free_internal;
11587 if (*tls_mask != 0)
11588 continue;
11589 }
11590
11591 if (stub_type == ppc_stub_plt_call
11592 && irela + 1 < irelaend
11593 && irela[1].r_offset == irela->r_offset + 4
11594 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11595 {
11596 if (!tocsave_find (htab, INSERT,
11597 &local_syms, irela + 1, input_bfd))
11598 goto error_ret_free_internal;
11599 }
11600 else if (stub_type == ppc_stub_plt_call)
11601 stub_type = ppc_stub_plt_call_r2save;
11602
11603 /* Support for grouping stub sections. */
11604 id_sec = htab->stub_group[section->id].link_sec;
11605
11606 /* Get the name of this stub. */
11607 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11608 if (!stub_name)
11609 goto error_ret_free_internal;
11610
11611 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11612 stub_name, FALSE, FALSE);
11613 if (stub_entry != NULL)
11614 {
11615 /* The proper stub has already been created. */
11616 free (stub_name);
11617 if (stub_type == ppc_stub_plt_call_r2save)
11618 stub_entry->stub_type = stub_type;
11619 continue;
11620 }
11621
11622 stub_entry = ppc_add_stub (stub_name, section, info);
11623 if (stub_entry == NULL)
11624 {
11625 free (stub_name);
11626 error_ret_free_internal:
11627 if (elf_section_data (section)->relocs == NULL)
11628 free (internal_relocs);
11629 error_ret_free_local:
11630 if (local_syms != NULL
11631 && (symtab_hdr->contents
11632 != (unsigned char *) local_syms))
11633 free (local_syms);
11634 return FALSE;
11635 }
11636
11637 stub_entry->stub_type = stub_type;
11638 if (stub_type != ppc_stub_plt_call
11639 && stub_type != ppc_stub_plt_call_r2save)
11640 {
11641 stub_entry->target_value = code_value;
11642 stub_entry->target_section = code_sec;
11643 }
11644 else
11645 {
11646 stub_entry->target_value = sym_value;
11647 stub_entry->target_section = sym_sec;
11648 }
11649 stub_entry->h = hash;
11650 stub_entry->plt_ent = plt_ent;
11651 stub_entry->addend = irela->r_addend;
11652
11653 if (stub_entry->h != NULL)
11654 htab->stub_globals += 1;
11655 }
11656
11657 /* We're done with the internal relocs, free them. */
11658 if (elf_section_data (section)->relocs != internal_relocs)
11659 free (internal_relocs);
11660 }
11661
11662 if (local_syms != NULL
11663 && symtab_hdr->contents != (unsigned char *) local_syms)
11664 {
11665 if (!info->keep_memory)
11666 free (local_syms);
11667 else
11668 symtab_hdr->contents = (unsigned char *) local_syms;
11669 }
11670 }
11671
11672 /* We may have added some stubs. Find out the new size of the
11673 stub sections. */
11674 for (stub_sec = htab->stub_bfd->sections;
11675 stub_sec != NULL;
11676 stub_sec = stub_sec->next)
11677 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11678 {
11679 stub_sec->rawsize = stub_sec->size;
11680 stub_sec->size = 0;
11681 stub_sec->reloc_count = 0;
11682 stub_sec->flags &= ~SEC_RELOC;
11683 }
11684
11685 htab->brlt->size = 0;
11686 htab->brlt->reloc_count = 0;
11687 htab->brlt->flags &= ~SEC_RELOC;
11688 if (htab->relbrlt != NULL)
11689 htab->relbrlt->size = 0;
11690
11691 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11692
11693 if (info->emitrelocations
11694 && htab->glink != NULL && htab->glink->size != 0)
11695 {
11696 htab->glink->reloc_count = 1;
11697 htab->glink->flags |= SEC_RELOC;
11698 }
11699
11700 if (htab->glink_eh_frame != NULL
11701 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11702 && htab->glink_eh_frame->output_section->size != 0)
11703 {
11704 size_t size = 0, align;
11705
11706 for (stub_sec = htab->stub_bfd->sections;
11707 stub_sec != NULL;
11708 stub_sec = stub_sec->next)
11709 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11710 size += 20;
11711 if (htab->glink != NULL && htab->glink->size != 0)
11712 size += 24;
11713 if (size != 0)
11714 size += sizeof (glink_eh_frame_cie);
11715 align = 1;
11716 align <<= htab->glink_eh_frame->output_section->alignment_power;
11717 align -= 1;
11718 size = (size + align) & ~align;
11719 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11720 htab->glink_eh_frame->size = size;
11721 }
11722
11723 if (htab->plt_stub_align != 0)
11724 for (stub_sec = htab->stub_bfd->sections;
11725 stub_sec != NULL;
11726 stub_sec = stub_sec->next)
11727 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11728 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11729 & (-1 << htab->plt_stub_align));
11730
11731 for (stub_sec = htab->stub_bfd->sections;
11732 stub_sec != NULL;
11733 stub_sec = stub_sec->next)
11734 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11735 && stub_sec->rawsize != stub_sec->size)
11736 break;
11737
11738 /* Exit from this loop when no stubs have been added, and no stubs
11739 have changed size. */
11740 if (stub_sec == NULL
11741 && (htab->glink_eh_frame == NULL
11742 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11743 break;
11744
11745 /* Ask the linker to do its stuff. */
11746 (*htab->layout_sections_again) ();
11747 }
11748
11749 maybe_strip_output (info, htab->brlt);
11750 if (htab->glink_eh_frame != NULL)
11751 maybe_strip_output (info, htab->glink_eh_frame);
11752
11753 return TRUE;
11754 }
11755
11756 /* Called after we have determined section placement. If sections
11757 move, we'll be called again. Provide a value for TOCstart. */
11758
11759 bfd_vma
11760 ppc64_elf_toc (bfd *obfd)
11761 {
11762 asection *s;
11763 bfd_vma TOCstart;
11764
11765 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11766 order. The TOC starts where the first of these sections starts. */
11767 s = bfd_get_section_by_name (obfd, ".got");
11768 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11769 s = bfd_get_section_by_name (obfd, ".toc");
11770 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11771 s = bfd_get_section_by_name (obfd, ".tocbss");
11772 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11773 s = bfd_get_section_by_name (obfd, ".plt");
11774 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11775 {
11776 /* This may happen for
11777 o references to TOC base (SYM@toc / TOC[tc0]) without a
11778 .toc directive
11779 o bad linker script
11780 o --gc-sections and empty TOC sections
11781
11782 FIXME: Warn user? */
11783
11784 /* Look for a likely section. We probably won't even be
11785 using TOCstart. */
11786 for (s = obfd->sections; s != NULL; s = s->next)
11787 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11788 | SEC_EXCLUDE))
11789 == (SEC_ALLOC | SEC_SMALL_DATA))
11790 break;
11791 if (s == NULL)
11792 for (s = obfd->sections; s != NULL; s = s->next)
11793 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11794 == (SEC_ALLOC | SEC_SMALL_DATA))
11795 break;
11796 if (s == NULL)
11797 for (s = obfd->sections; s != NULL; s = s->next)
11798 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11799 == SEC_ALLOC)
11800 break;
11801 if (s == NULL)
11802 for (s = obfd->sections; s != NULL; s = s->next)
11803 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11804 break;
11805 }
11806
11807 TOCstart = 0;
11808 if (s != NULL)
11809 TOCstart = s->output_section->vma + s->output_offset;
11810
11811 return TOCstart;
11812 }
11813
11814 /* Build all the stubs associated with the current output file.
11815 The stubs are kept in a hash table attached to the main linker
11816 hash table. This function is called via gldelf64ppc_finish. */
11817
11818 bfd_boolean
11819 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11820 struct bfd_link_info *info,
11821 char **stats)
11822 {
11823 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11824 asection *stub_sec;
11825 bfd_byte *p;
11826 int stub_sec_count = 0;
11827
11828 if (htab == NULL)
11829 return FALSE;
11830
11831 htab->emit_stub_syms = emit_stub_syms;
11832
11833 /* Allocate memory to hold the linker stubs. */
11834 for (stub_sec = htab->stub_bfd->sections;
11835 stub_sec != NULL;
11836 stub_sec = stub_sec->next)
11837 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11838 && stub_sec->size != 0)
11839 {
11840 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11841 if (stub_sec->contents == NULL)
11842 return FALSE;
11843 /* We want to check that built size is the same as calculated
11844 size. rawsize is a convenient location to use. */
11845 stub_sec->rawsize = stub_sec->size;
11846 stub_sec->size = 0;
11847 }
11848
11849 if (htab->glink != NULL && htab->glink->size != 0)
11850 {
11851 unsigned int indx;
11852 bfd_vma plt0;
11853
11854 /* Build the .glink plt call stub. */
11855 if (htab->emit_stub_syms)
11856 {
11857 struct elf_link_hash_entry *h;
11858 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11859 TRUE, FALSE, FALSE);
11860 if (h == NULL)
11861 return FALSE;
11862 if (h->root.type == bfd_link_hash_new)
11863 {
11864 h->root.type = bfd_link_hash_defined;
11865 h->root.u.def.section = htab->glink;
11866 h->root.u.def.value = 8;
11867 h->ref_regular = 1;
11868 h->def_regular = 1;
11869 h->ref_regular_nonweak = 1;
11870 h->forced_local = 1;
11871 h->non_elf = 0;
11872 }
11873 }
11874 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11875 if (info->emitrelocations)
11876 {
11877 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11878 if (r == NULL)
11879 return FALSE;
11880 r->r_offset = (htab->glink->output_offset
11881 + htab->glink->output_section->vma);
11882 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11883 r->r_addend = plt0;
11884 }
11885 p = htab->glink->contents;
11886 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11887 bfd_put_64 (htab->glink->owner, plt0, p);
11888 p += 8;
11889 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11890 p += 4;
11891 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11892 p += 4;
11893 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11894 p += 4;
11895 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11896 p += 4;
11897 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11898 p += 4;
11899 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11900 p += 4;
11901 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11902 p += 4;
11903 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11904 p += 4;
11905 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11906 p += 4;
11907 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11908 p += 4;
11909 bfd_put_32 (htab->glink->owner, BCTR, p);
11910 p += 4;
11911 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11912 {
11913 bfd_put_32 (htab->glink->owner, NOP, p);
11914 p += 4;
11915 }
11916
11917 /* Build the .glink lazy link call stubs. */
11918 indx = 0;
11919 while (p < htab->glink->contents + htab->glink->size)
11920 {
11921 if (indx < 0x8000)
11922 {
11923 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11924 p += 4;
11925 }
11926 else
11927 {
11928 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11929 p += 4;
11930 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11931 p += 4;
11932 }
11933 bfd_put_32 (htab->glink->owner,
11934 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11935 indx++;
11936 p += 4;
11937 }
11938 htab->glink->rawsize = p - htab->glink->contents;
11939 }
11940
11941 if (htab->brlt->size != 0)
11942 {
11943 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11944 htab->brlt->size);
11945 if (htab->brlt->contents == NULL)
11946 return FALSE;
11947 }
11948 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11949 {
11950 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11951 htab->relbrlt->size);
11952 if (htab->relbrlt->contents == NULL)
11953 return FALSE;
11954 }
11955
11956 if (htab->glink_eh_frame != NULL
11957 && htab->glink_eh_frame->size != 0)
11958 {
11959 bfd_vma val;
11960 bfd_byte *last_fde;
11961 size_t last_fde_len, size, align, pad;
11962
11963 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11964 if (p == NULL)
11965 return FALSE;
11966 htab->glink_eh_frame->contents = p;
11967 last_fde = p;
11968
11969 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11970
11971 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11972 /* CIE length (rewrite in case little-endian). */
11973 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
11974 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
11975 p += sizeof (glink_eh_frame_cie);
11976
11977 for (stub_sec = htab->stub_bfd->sections;
11978 stub_sec != NULL;
11979 stub_sec = stub_sec->next)
11980 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11981 {
11982 last_fde = p;
11983 last_fde_len = 16;
11984 /* FDE length. */
11985 bfd_put_32 (htab->elf.dynobj, 16, p);
11986 p += 4;
11987 /* CIE pointer. */
11988 val = p - htab->glink_eh_frame->contents;
11989 bfd_put_32 (htab->elf.dynobj, val, p);
11990 p += 4;
11991 /* Offset to stub section. */
11992 val = (stub_sec->output_section->vma
11993 + stub_sec->output_offset);
11994 val -= (htab->glink_eh_frame->output_section->vma
11995 + htab->glink_eh_frame->output_offset);
11996 val -= p - htab->glink_eh_frame->contents;
11997 if (val + 0x80000000 > 0xffffffff)
11998 {
11999 info->callbacks->einfo
12000 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12001 stub_sec->name);
12002 return FALSE;
12003 }
12004 bfd_put_32 (htab->elf.dynobj, val, p);
12005 p += 4;
12006 /* stub section size. */
12007 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12008 p += 4;
12009 /* Augmentation. */
12010 p += 1;
12011 /* Pad. */
12012 p += 3;
12013 }
12014 if (htab->glink != NULL && htab->glink->size != 0)
12015 {
12016 last_fde = p;
12017 last_fde_len = 20;
12018 /* FDE length. */
12019 bfd_put_32 (htab->elf.dynobj, 20, p);
12020 p += 4;
12021 /* CIE pointer. */
12022 val = p - htab->glink_eh_frame->contents;
12023 bfd_put_32 (htab->elf.dynobj, val, p);
12024 p += 4;
12025 /* Offset to .glink. */
12026 val = (htab->glink->output_section->vma
12027 + htab->glink->output_offset
12028 + 8);
12029 val -= (htab->glink_eh_frame->output_section->vma
12030 + htab->glink_eh_frame->output_offset);
12031 val -= p - htab->glink_eh_frame->contents;
12032 if (val + 0x80000000 > 0xffffffff)
12033 {
12034 info->callbacks->einfo
12035 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12036 htab->glink->name);
12037 return FALSE;
12038 }
12039 bfd_put_32 (htab->elf.dynobj, val, p);
12040 p += 4;
12041 /* .glink size. */
12042 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12043 p += 4;
12044 /* Augmentation. */
12045 p += 1;
12046
12047 *p++ = DW_CFA_advance_loc + 1;
12048 *p++ = DW_CFA_register;
12049 *p++ = 65;
12050 *p++ = 12;
12051 *p++ = DW_CFA_advance_loc + 4;
12052 *p++ = DW_CFA_restore_extended;
12053 *p++ = 65;
12054 }
12055 /* Subsume any padding into the last FDE if user .eh_frame
12056 sections are aligned more than glink_eh_frame. Otherwise any
12057 zero padding will be seen as a terminator. */
12058 size = p - htab->glink_eh_frame->contents;
12059 align = 1;
12060 align <<= htab->glink_eh_frame->output_section->alignment_power;
12061 align -= 1;
12062 pad = ((size + align) & ~align) - size;
12063 htab->glink_eh_frame->size = size + pad;
12064 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12065 }
12066
12067 /* Build the stubs as directed by the stub hash table. */
12068 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12069
12070 if (htab->relbrlt != NULL)
12071 htab->relbrlt->reloc_count = 0;
12072
12073 if (htab->plt_stub_align != 0)
12074 for (stub_sec = htab->stub_bfd->sections;
12075 stub_sec != NULL;
12076 stub_sec = stub_sec->next)
12077 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12078 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12079 & (-1 << htab->plt_stub_align));
12080
12081 for (stub_sec = htab->stub_bfd->sections;
12082 stub_sec != NULL;
12083 stub_sec = stub_sec->next)
12084 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12085 {
12086 stub_sec_count += 1;
12087 if (stub_sec->rawsize != stub_sec->size)
12088 break;
12089 }
12090
12091 if (stub_sec != NULL
12092 || htab->glink->rawsize != htab->glink->size
12093 || (htab->glink_eh_frame != NULL
12094 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12095 {
12096 htab->stub_error = TRUE;
12097 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12098 }
12099
12100 if (htab->stub_error)
12101 return FALSE;
12102
12103 if (stats != NULL)
12104 {
12105 *stats = bfd_malloc (500);
12106 if (*stats == NULL)
12107 return FALSE;
12108
12109 sprintf (*stats, _("linker stubs in %u group%s\n"
12110 " branch %lu\n"
12111 " toc adjust %lu\n"
12112 " long branch %lu\n"
12113 " long toc adj %lu\n"
12114 " plt call %lu\n"
12115 " plt call toc %lu"),
12116 stub_sec_count,
12117 stub_sec_count == 1 ? "" : "s",
12118 htab->stub_count[ppc_stub_long_branch - 1],
12119 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12120 htab->stub_count[ppc_stub_plt_branch - 1],
12121 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12122 htab->stub_count[ppc_stub_plt_call - 1],
12123 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12124 }
12125 return TRUE;
12126 }
12127
12128 /* This function undoes the changes made by add_symbol_adjust. */
12129
12130 static bfd_boolean
12131 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12132 {
12133 struct ppc_link_hash_entry *eh;
12134
12135 if (h->root.type == bfd_link_hash_indirect)
12136 return TRUE;
12137
12138 eh = (struct ppc_link_hash_entry *) h;
12139 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12140 return TRUE;
12141
12142 eh->elf.root.type = bfd_link_hash_undefined;
12143 return TRUE;
12144 }
12145
12146 void
12147 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12148 {
12149 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12150
12151 if (htab != NULL)
12152 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12153 }
12154
12155 /* What to do when ld finds relocations against symbols defined in
12156 discarded sections. */
12157
12158 static unsigned int
12159 ppc64_elf_action_discarded (asection *sec)
12160 {
12161 if (strcmp (".opd", sec->name) == 0)
12162 return 0;
12163
12164 if (strcmp (".toc", sec->name) == 0)
12165 return 0;
12166
12167 if (strcmp (".toc1", sec->name) == 0)
12168 return 0;
12169
12170 return _bfd_elf_default_action_discarded (sec);
12171 }
12172
12173 /* The RELOCATE_SECTION function is called by the ELF backend linker
12174 to handle the relocations for a section.
12175
12176 The relocs are always passed as Rela structures; if the section
12177 actually uses Rel structures, the r_addend field will always be
12178 zero.
12179
12180 This function is responsible for adjust the section contents as
12181 necessary, and (if using Rela relocs and generating a
12182 relocatable output file) adjusting the reloc addend as
12183 necessary.
12184
12185 This function does not have to worry about setting the reloc
12186 address or the reloc symbol index.
12187
12188 LOCAL_SYMS is a pointer to the swapped in local symbols.
12189
12190 LOCAL_SECTIONS is an array giving the section in the input file
12191 corresponding to the st_shndx field of each local symbol.
12192
12193 The global hash table entry for the global symbols can be found
12194 via elf_sym_hashes (input_bfd).
12195
12196 When generating relocatable output, this function must handle
12197 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12198 going to be the section symbol corresponding to the output
12199 section, which means that the addend must be adjusted
12200 accordingly. */
12201
12202 static bfd_boolean
12203 ppc64_elf_relocate_section (bfd *output_bfd,
12204 struct bfd_link_info *info,
12205 bfd *input_bfd,
12206 asection *input_section,
12207 bfd_byte *contents,
12208 Elf_Internal_Rela *relocs,
12209 Elf_Internal_Sym *local_syms,
12210 asection **local_sections)
12211 {
12212 struct ppc_link_hash_table *htab;
12213 Elf_Internal_Shdr *symtab_hdr;
12214 struct elf_link_hash_entry **sym_hashes;
12215 Elf_Internal_Rela *rel;
12216 Elf_Internal_Rela *relend;
12217 Elf_Internal_Rela outrel;
12218 bfd_byte *loc;
12219 struct got_entry **local_got_ents;
12220 bfd_vma TOCstart;
12221 bfd_boolean ret = TRUE;
12222 bfd_boolean is_opd;
12223 /* Assume 'at' branch hints. */
12224 bfd_boolean is_isa_v2 = TRUE;
12225 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12226
12227 /* Initialize howto table if needed. */
12228 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12229 ppc_howto_init ();
12230
12231 htab = ppc_hash_table (info);
12232 if (htab == NULL)
12233 return FALSE;
12234
12235 /* Don't relocate stub sections. */
12236 if (input_section->owner == htab->stub_bfd)
12237 return TRUE;
12238
12239 BFD_ASSERT (is_ppc64_elf (input_bfd));
12240
12241 local_got_ents = elf_local_got_ents (input_bfd);
12242 TOCstart = elf_gp (output_bfd);
12243 symtab_hdr = &elf_symtab_hdr (input_bfd);
12244 sym_hashes = elf_sym_hashes (input_bfd);
12245 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12246
12247 rel = relocs;
12248 relend = relocs + input_section->reloc_count;
12249 for (; rel < relend; rel++)
12250 {
12251 enum elf_ppc64_reloc_type r_type;
12252 bfd_vma addend, orig_addend;
12253 bfd_reloc_status_type r;
12254 Elf_Internal_Sym *sym;
12255 asection *sec;
12256 struct elf_link_hash_entry *h_elf;
12257 struct ppc_link_hash_entry *h;
12258 struct ppc_link_hash_entry *fdh;
12259 const char *sym_name;
12260 unsigned long r_symndx, toc_symndx;
12261 bfd_vma toc_addend;
12262 unsigned char tls_mask, tls_gd, tls_type;
12263 unsigned char sym_type;
12264 bfd_vma relocation;
12265 bfd_boolean unresolved_reloc;
12266 bfd_boolean warned;
12267 unsigned int insn;
12268 unsigned int mask;
12269 struct ppc_stub_hash_entry *stub_entry;
12270 bfd_vma max_br_offset;
12271 bfd_vma from;
12272
12273 r_type = ELF64_R_TYPE (rel->r_info);
12274 r_symndx = ELF64_R_SYM (rel->r_info);
12275
12276 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12277 symbol of the previous ADDR64 reloc. The symbol gives us the
12278 proper TOC base to use. */
12279 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12280 && rel != relocs
12281 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12282 && is_opd)
12283 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12284
12285 sym = NULL;
12286 sec = NULL;
12287 h_elf = NULL;
12288 sym_name = NULL;
12289 unresolved_reloc = FALSE;
12290 warned = FALSE;
12291 orig_addend = rel->r_addend;
12292
12293 if (r_symndx < symtab_hdr->sh_info)
12294 {
12295 /* It's a local symbol. */
12296 struct _opd_sec_data *opd;
12297
12298 sym = local_syms + r_symndx;
12299 sec = local_sections[r_symndx];
12300 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12301 sym_type = ELF64_ST_TYPE (sym->st_info);
12302 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12303 opd = get_opd_info (sec);
12304 if (opd != NULL && opd->adjust != NULL)
12305 {
12306 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12307 if (adjust == -1)
12308 relocation = 0;
12309 else
12310 {
12311 /* If this is a relocation against the opd section sym
12312 and we have edited .opd, adjust the reloc addend so
12313 that ld -r and ld --emit-relocs output is correct.
12314 If it is a reloc against some other .opd symbol,
12315 then the symbol value will be adjusted later. */
12316 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12317 rel->r_addend += adjust;
12318 else
12319 relocation += adjust;
12320 }
12321 }
12322 }
12323 else
12324 {
12325 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12326 r_symndx, symtab_hdr, sym_hashes,
12327 h_elf, sec, relocation,
12328 unresolved_reloc, warned);
12329 sym_name = h_elf->root.root.string;
12330 sym_type = h_elf->type;
12331 }
12332 h = (struct ppc_link_hash_entry *) h_elf;
12333
12334 if (sec != NULL && discarded_section (sec))
12335 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12336 rel, 1, relend,
12337 ppc64_elf_howto_table[r_type], 0,
12338 contents);
12339
12340 if (info->relocatable)
12341 continue;
12342
12343 /* TLS optimizations. Replace instruction sequences and relocs
12344 based on information we collected in tls_optimize. We edit
12345 RELOCS so that --emit-relocs will output something sensible
12346 for the final instruction stream. */
12347 tls_mask = 0;
12348 tls_gd = 0;
12349 toc_symndx = 0;
12350 if (h != NULL)
12351 tls_mask = h->tls_mask;
12352 else if (local_got_ents != NULL)
12353 {
12354 struct plt_entry **local_plt = (struct plt_entry **)
12355 (local_got_ents + symtab_hdr->sh_info);
12356 unsigned char *lgot_masks = (unsigned char *)
12357 (local_plt + symtab_hdr->sh_info);
12358 tls_mask = lgot_masks[r_symndx];
12359 }
12360 if (tls_mask == 0
12361 && (r_type == R_PPC64_TLS
12362 || r_type == R_PPC64_TLSGD
12363 || r_type == R_PPC64_TLSLD))
12364 {
12365 /* Check for toc tls entries. */
12366 unsigned char *toc_tls;
12367
12368 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12369 &local_syms, rel, input_bfd))
12370 return FALSE;
12371
12372 if (toc_tls)
12373 tls_mask = *toc_tls;
12374 }
12375
12376 /* Check that tls relocs are used with tls syms, and non-tls
12377 relocs are used with non-tls syms. */
12378 if (r_symndx != STN_UNDEF
12379 && r_type != R_PPC64_NONE
12380 && (h == NULL
12381 || h->elf.root.type == bfd_link_hash_defined
12382 || h->elf.root.type == bfd_link_hash_defweak)
12383 && (IS_PPC64_TLS_RELOC (r_type)
12384 != (sym_type == STT_TLS
12385 || (sym_type == STT_SECTION
12386 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12387 {
12388 if (tls_mask != 0
12389 && (r_type == R_PPC64_TLS
12390 || r_type == R_PPC64_TLSGD
12391 || r_type == R_PPC64_TLSLD))
12392 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12393 ;
12394 else
12395 info->callbacks->einfo
12396 (!IS_PPC64_TLS_RELOC (r_type)
12397 ? _("%P: %H: %s used with TLS symbol %s\n")
12398 : _("%P: %H: %s used with non-TLS symbol %s\n"),
12399 input_bfd, input_section, rel->r_offset,
12400 ppc64_elf_howto_table[r_type]->name,
12401 sym_name);
12402 }
12403
12404 /* Ensure reloc mapping code below stays sane. */
12405 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12406 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12407 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12408 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12409 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12410 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12411 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12412 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12413 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12414 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12415 abort ();
12416
12417 switch (r_type)
12418 {
12419 default:
12420 break;
12421
12422 case R_PPC64_LO_DS_OPT:
12423 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12424 if ((insn & (0x3f << 26)) != 58u << 26)
12425 abort ();
12426 insn += (14u << 26) - (58u << 26);
12427 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12428 r_type = R_PPC64_TOC16_LO;
12429 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12430 break;
12431
12432 case R_PPC64_TOC16:
12433 case R_PPC64_TOC16_LO:
12434 case R_PPC64_TOC16_DS:
12435 case R_PPC64_TOC16_LO_DS:
12436 {
12437 /* Check for toc tls entries. */
12438 unsigned char *toc_tls;
12439 int retval;
12440
12441 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12442 &local_syms, rel, input_bfd);
12443 if (retval == 0)
12444 return FALSE;
12445
12446 if (toc_tls)
12447 {
12448 tls_mask = *toc_tls;
12449 if (r_type == R_PPC64_TOC16_DS
12450 || r_type == R_PPC64_TOC16_LO_DS)
12451 {
12452 if (tls_mask != 0
12453 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12454 goto toctprel;
12455 }
12456 else
12457 {
12458 /* If we found a GD reloc pair, then we might be
12459 doing a GD->IE transition. */
12460 if (retval == 2)
12461 {
12462 tls_gd = TLS_TPRELGD;
12463 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12464 goto tls_ldgd_opt;
12465 }
12466 else if (retval == 3)
12467 {
12468 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12469 goto tls_ldgd_opt;
12470 }
12471 }
12472 }
12473 }
12474 break;
12475
12476 case R_PPC64_GOT_TPREL16_HI:
12477 case R_PPC64_GOT_TPREL16_HA:
12478 if (tls_mask != 0
12479 && (tls_mask & TLS_TPREL) == 0)
12480 {
12481 rel->r_offset -= d_offset;
12482 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12483 r_type = R_PPC64_NONE;
12484 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12485 }
12486 break;
12487
12488 case R_PPC64_GOT_TPREL16_DS:
12489 case R_PPC64_GOT_TPREL16_LO_DS:
12490 if (tls_mask != 0
12491 && (tls_mask & TLS_TPREL) == 0)
12492 {
12493 toctprel:
12494 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12495 insn &= 31 << 21;
12496 insn |= 0x3c0d0000; /* addis 0,13,0 */
12497 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12498 r_type = R_PPC64_TPREL16_HA;
12499 if (toc_symndx != 0)
12500 {
12501 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12502 rel->r_addend = toc_addend;
12503 /* We changed the symbol. Start over in order to
12504 get h, sym, sec etc. right. */
12505 rel--;
12506 continue;
12507 }
12508 else
12509 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12510 }
12511 break;
12512
12513 case R_PPC64_TLS:
12514 if (tls_mask != 0
12515 && (tls_mask & TLS_TPREL) == 0)
12516 {
12517 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12518 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12519 if (insn == 0)
12520 abort ();
12521 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12522 /* Was PPC64_TLS which sits on insn boundary, now
12523 PPC64_TPREL16_LO which is at low-order half-word. */
12524 rel->r_offset += d_offset;
12525 r_type = R_PPC64_TPREL16_LO;
12526 if (toc_symndx != 0)
12527 {
12528 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12529 rel->r_addend = toc_addend;
12530 /* We changed the symbol. Start over in order to
12531 get h, sym, sec etc. right. */
12532 rel--;
12533 continue;
12534 }
12535 else
12536 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12537 }
12538 break;
12539
12540 case R_PPC64_GOT_TLSGD16_HI:
12541 case R_PPC64_GOT_TLSGD16_HA:
12542 tls_gd = TLS_TPRELGD;
12543 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12544 goto tls_gdld_hi;
12545 break;
12546
12547 case R_PPC64_GOT_TLSLD16_HI:
12548 case R_PPC64_GOT_TLSLD16_HA:
12549 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12550 {
12551 tls_gdld_hi:
12552 if ((tls_mask & tls_gd) != 0)
12553 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12554 + R_PPC64_GOT_TPREL16_DS);
12555 else
12556 {
12557 rel->r_offset -= d_offset;
12558 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12559 r_type = R_PPC64_NONE;
12560 }
12561 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12562 }
12563 break;
12564
12565 case R_PPC64_GOT_TLSGD16:
12566 case R_PPC64_GOT_TLSGD16_LO:
12567 tls_gd = TLS_TPRELGD;
12568 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12569 goto tls_ldgd_opt;
12570 break;
12571
12572 case R_PPC64_GOT_TLSLD16:
12573 case R_PPC64_GOT_TLSLD16_LO:
12574 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12575 {
12576 unsigned int insn1, insn2, insn3;
12577 bfd_vma offset;
12578
12579 tls_ldgd_opt:
12580 offset = (bfd_vma) -1;
12581 /* If not using the newer R_PPC64_TLSGD/LD to mark
12582 __tls_get_addr calls, we must trust that the call
12583 stays with its arg setup insns, ie. that the next
12584 reloc is the __tls_get_addr call associated with
12585 the current reloc. Edit both insns. */
12586 if (input_section->has_tls_get_addr_call
12587 && rel + 1 < relend
12588 && branch_reloc_hash_match (input_bfd, rel + 1,
12589 htab->tls_get_addr,
12590 htab->tls_get_addr_fd))
12591 offset = rel[1].r_offset;
12592 if ((tls_mask & tls_gd) != 0)
12593 {
12594 /* IE */
12595 insn1 = bfd_get_32 (output_bfd,
12596 contents + rel->r_offset - d_offset);
12597 insn1 &= (1 << 26) - (1 << 2);
12598 insn1 |= 58 << 26; /* ld */
12599 insn2 = 0x7c636a14; /* add 3,3,13 */
12600 if (offset != (bfd_vma) -1)
12601 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12602 if ((tls_mask & TLS_EXPLICIT) == 0)
12603 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12604 + R_PPC64_GOT_TPREL16_DS);
12605 else
12606 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12607 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12608 }
12609 else
12610 {
12611 /* LE */
12612 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12613 insn2 = 0x38630000; /* addi 3,3,0 */
12614 if (tls_gd == 0)
12615 {
12616 /* Was an LD reloc. */
12617 if (toc_symndx)
12618 sec = local_sections[toc_symndx];
12619 for (r_symndx = 0;
12620 r_symndx < symtab_hdr->sh_info;
12621 r_symndx++)
12622 if (local_sections[r_symndx] == sec)
12623 break;
12624 if (r_symndx >= symtab_hdr->sh_info)
12625 r_symndx = STN_UNDEF;
12626 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12627 if (r_symndx != STN_UNDEF)
12628 rel->r_addend -= (local_syms[r_symndx].st_value
12629 + sec->output_offset
12630 + sec->output_section->vma);
12631 }
12632 else if (toc_symndx != 0)
12633 {
12634 r_symndx = toc_symndx;
12635 rel->r_addend = toc_addend;
12636 }
12637 r_type = R_PPC64_TPREL16_HA;
12638 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12639 if (offset != (bfd_vma) -1)
12640 {
12641 rel[1].r_info = ELF64_R_INFO (r_symndx,
12642 R_PPC64_TPREL16_LO);
12643 rel[1].r_offset = offset + d_offset;
12644 rel[1].r_addend = rel->r_addend;
12645 }
12646 }
12647 bfd_put_32 (output_bfd, insn1,
12648 contents + rel->r_offset - d_offset);
12649 if (offset != (bfd_vma) -1)
12650 {
12651 insn3 = bfd_get_32 (output_bfd,
12652 contents + offset + 4);
12653 if (insn3 == NOP
12654 || insn3 == CROR_151515 || insn3 == CROR_313131)
12655 {
12656 rel[1].r_offset += 4;
12657 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12658 insn2 = NOP;
12659 }
12660 bfd_put_32 (output_bfd, insn2, contents + offset);
12661 }
12662 if ((tls_mask & tls_gd) == 0
12663 && (tls_gd == 0 || toc_symndx != 0))
12664 {
12665 /* We changed the symbol. Start over in order
12666 to get h, sym, sec etc. right. */
12667 rel--;
12668 continue;
12669 }
12670 }
12671 break;
12672
12673 case R_PPC64_TLSGD:
12674 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12675 {
12676 unsigned int insn2, insn3;
12677 bfd_vma offset = rel->r_offset;
12678
12679 if ((tls_mask & TLS_TPRELGD) != 0)
12680 {
12681 /* IE */
12682 r_type = R_PPC64_NONE;
12683 insn2 = 0x7c636a14; /* add 3,3,13 */
12684 }
12685 else
12686 {
12687 /* LE */
12688 if (toc_symndx != 0)
12689 {
12690 r_symndx = toc_symndx;
12691 rel->r_addend = toc_addend;
12692 }
12693 r_type = R_PPC64_TPREL16_LO;
12694 rel->r_offset = offset + d_offset;
12695 insn2 = 0x38630000; /* addi 3,3,0 */
12696 }
12697 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12698 /* Zap the reloc on the _tls_get_addr call too. */
12699 BFD_ASSERT (offset == rel[1].r_offset);
12700 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12701 insn3 = bfd_get_32 (output_bfd,
12702 contents + offset + 4);
12703 if (insn3 == NOP
12704 || insn3 == CROR_151515 || insn3 == CROR_313131)
12705 {
12706 rel->r_offset += 4;
12707 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12708 insn2 = NOP;
12709 }
12710 bfd_put_32 (output_bfd, insn2, contents + offset);
12711 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12712 {
12713 rel--;
12714 continue;
12715 }
12716 }
12717 break;
12718
12719 case R_PPC64_TLSLD:
12720 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12721 {
12722 unsigned int insn2, insn3;
12723 bfd_vma offset = rel->r_offset;
12724
12725 if (toc_symndx)
12726 sec = local_sections[toc_symndx];
12727 for (r_symndx = 0;
12728 r_symndx < symtab_hdr->sh_info;
12729 r_symndx++)
12730 if (local_sections[r_symndx] == sec)
12731 break;
12732 if (r_symndx >= symtab_hdr->sh_info)
12733 r_symndx = STN_UNDEF;
12734 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12735 if (r_symndx != STN_UNDEF)
12736 rel->r_addend -= (local_syms[r_symndx].st_value
12737 + sec->output_offset
12738 + sec->output_section->vma);
12739
12740 r_type = R_PPC64_TPREL16_LO;
12741 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12742 rel->r_offset = offset + d_offset;
12743 /* Zap the reloc on the _tls_get_addr call too. */
12744 BFD_ASSERT (offset == rel[1].r_offset);
12745 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12746 insn2 = 0x38630000; /* addi 3,3,0 */
12747 insn3 = bfd_get_32 (output_bfd,
12748 contents + offset + 4);
12749 if (insn3 == NOP
12750 || insn3 == CROR_151515 || insn3 == CROR_313131)
12751 {
12752 rel->r_offset += 4;
12753 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12754 insn2 = NOP;
12755 }
12756 bfd_put_32 (output_bfd, insn2, contents + offset);
12757 rel--;
12758 continue;
12759 }
12760 break;
12761
12762 case R_PPC64_DTPMOD64:
12763 if (rel + 1 < relend
12764 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12765 && rel[1].r_offset == rel->r_offset + 8)
12766 {
12767 if ((tls_mask & TLS_GD) == 0)
12768 {
12769 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12770 if ((tls_mask & TLS_TPRELGD) != 0)
12771 r_type = R_PPC64_TPREL64;
12772 else
12773 {
12774 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12775 r_type = R_PPC64_NONE;
12776 }
12777 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12778 }
12779 }
12780 else
12781 {
12782 if ((tls_mask & TLS_LD) == 0)
12783 {
12784 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12785 r_type = R_PPC64_NONE;
12786 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12787 }
12788 }
12789 break;
12790
12791 case R_PPC64_TPREL64:
12792 if ((tls_mask & TLS_TPREL) == 0)
12793 {
12794 r_type = R_PPC64_NONE;
12795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12796 }
12797 break;
12798 }
12799
12800 /* Handle other relocations that tweak non-addend part of insn. */
12801 insn = 0;
12802 max_br_offset = 1 << 25;
12803 addend = rel->r_addend;
12804 switch (r_type)
12805 {
12806 default:
12807 break;
12808
12809 case R_PPC64_TOCSAVE:
12810 if (relocation + addend == (rel->r_offset
12811 + input_section->output_offset
12812 + input_section->output_section->vma)
12813 && tocsave_find (htab, NO_INSERT,
12814 &local_syms, rel, input_bfd))
12815 {
12816 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12817 if (insn == NOP
12818 || insn == CROR_151515 || insn == CROR_313131)
12819 bfd_put_32 (input_bfd, STD_R2_40R1,
12820 contents + rel->r_offset);
12821 }
12822 break;
12823
12824 /* Branch taken prediction relocations. */
12825 case R_PPC64_ADDR14_BRTAKEN:
12826 case R_PPC64_REL14_BRTAKEN:
12827 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12828 /* Fall thru. */
12829
12830 /* Branch not taken prediction relocations. */
12831 case R_PPC64_ADDR14_BRNTAKEN:
12832 case R_PPC64_REL14_BRNTAKEN:
12833 insn |= bfd_get_32 (output_bfd,
12834 contents + rel->r_offset) & ~(0x01 << 21);
12835 /* Fall thru. */
12836
12837 case R_PPC64_REL14:
12838 max_br_offset = 1 << 15;
12839 /* Fall thru. */
12840
12841 case R_PPC64_REL24:
12842 /* Calls to functions with a different TOC, such as calls to
12843 shared objects, need to alter the TOC pointer. This is
12844 done using a linkage stub. A REL24 branching to these
12845 linkage stubs needs to be followed by a nop, as the nop
12846 will be replaced with an instruction to restore the TOC
12847 base pointer. */
12848 fdh = h;
12849 if (h != NULL
12850 && h->oh != NULL
12851 && h->oh->is_func_descriptor)
12852 fdh = ppc_follow_link (h->oh);
12853 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12854 if (stub_entry != NULL
12855 && (stub_entry->stub_type == ppc_stub_plt_call
12856 || stub_entry->stub_type == ppc_stub_plt_call_r2save
12857 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12858 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12859 {
12860 bfd_boolean can_plt_call = FALSE;
12861
12862 if (rel->r_offset + 8 <= input_section->size)
12863 {
12864 unsigned long nop;
12865 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12866 if (nop == NOP
12867 || nop == CROR_151515 || nop == CROR_313131)
12868 {
12869 if (h != NULL
12870 && (h == htab->tls_get_addr_fd
12871 || h == htab->tls_get_addr)
12872 && !htab->no_tls_get_addr_opt)
12873 {
12874 /* Special stub used, leave nop alone. */
12875 }
12876 else
12877 bfd_put_32 (input_bfd, LD_R2_40R1,
12878 contents + rel->r_offset + 4);
12879 can_plt_call = TRUE;
12880 }
12881 }
12882
12883 if (!can_plt_call)
12884 {
12885 if (stub_entry->stub_type == ppc_stub_plt_call
12886 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12887 {
12888 /* If this is a plain branch rather than a branch
12889 and link, don't require a nop. However, don't
12890 allow tail calls in a shared library as they
12891 will result in r2 being corrupted. */
12892 unsigned long br;
12893 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12894 if (info->executable && (br & 1) == 0)
12895 can_plt_call = TRUE;
12896 else
12897 stub_entry = NULL;
12898 }
12899 else if (h != NULL
12900 && strcmp (h->elf.root.root.string,
12901 ".__libc_start_main") == 0)
12902 {
12903 /* Allow crt1 branch to go via a toc adjusting stub. */
12904 can_plt_call = TRUE;
12905 }
12906 else
12907 {
12908 if (strcmp (input_section->output_section->name,
12909 ".init") == 0
12910 || strcmp (input_section->output_section->name,
12911 ".fini") == 0)
12912 info->callbacks->einfo
12913 (_("%P: %H: automatic multiple TOCs "
12914 "not supported using your crt files; "
12915 "recompile with -mminimal-toc or upgrade gcc\n"),
12916 input_bfd, input_section, rel->r_offset);
12917 else
12918 info->callbacks->einfo
12919 (_("%P: %H: sibling call optimization to `%s' "
12920 "does not allow automatic multiple TOCs; "
12921 "recompile with -mminimal-toc or "
12922 "-fno-optimize-sibling-calls, "
12923 "or make `%s' extern\n"),
12924 input_bfd, input_section, rel->r_offset,
12925 sym_name,
12926 sym_name);
12927 bfd_set_error (bfd_error_bad_value);
12928 ret = FALSE;
12929 }
12930 }
12931
12932 if (can_plt_call
12933 && (stub_entry->stub_type == ppc_stub_plt_call
12934 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
12935 unresolved_reloc = FALSE;
12936 }
12937
12938 if ((stub_entry == NULL
12939 || stub_entry->stub_type == ppc_stub_long_branch
12940 || stub_entry->stub_type == ppc_stub_plt_branch)
12941 && get_opd_info (sec) != NULL)
12942 {
12943 /* The branch destination is the value of the opd entry. */
12944 bfd_vma off = (relocation + addend
12945 - sec->output_section->vma
12946 - sec->output_offset);
12947 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
12948 if (dest != (bfd_vma) -1)
12949 {
12950 relocation = dest;
12951 addend = 0;
12952 }
12953 }
12954
12955 /* If the branch is out of reach we ought to have a long
12956 branch stub. */
12957 from = (rel->r_offset
12958 + input_section->output_offset
12959 + input_section->output_section->vma);
12960
12961 if (stub_entry != NULL
12962 && (stub_entry->stub_type == ppc_stub_long_branch
12963 || stub_entry->stub_type == ppc_stub_plt_branch)
12964 && (r_type == R_PPC64_ADDR14_BRTAKEN
12965 || r_type == R_PPC64_ADDR14_BRNTAKEN
12966 || (relocation + addend - from + max_br_offset
12967 < 2 * max_br_offset)))
12968 /* Don't use the stub if this branch is in range. */
12969 stub_entry = NULL;
12970
12971 if (stub_entry != NULL)
12972 {
12973 /* Munge up the value and addend so that we call the stub
12974 rather than the procedure directly. */
12975 relocation = (stub_entry->stub_offset
12976 + stub_entry->stub_sec->output_offset
12977 + stub_entry->stub_sec->output_section->vma);
12978 addend = 0;
12979
12980 if ((stub_entry->stub_type == ppc_stub_plt_call
12981 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12982 && (ALWAYS_EMIT_R2SAVE
12983 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12984 && rel + 1 < relend
12985 && rel[1].r_offset == rel->r_offset + 4
12986 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
12987 relocation += 4;
12988 }
12989
12990 if (insn != 0)
12991 {
12992 if (is_isa_v2)
12993 {
12994 /* Set 'a' bit. This is 0b00010 in BO field for branch
12995 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12996 for branch on CTR insns (BO == 1a00t or 1a01t). */
12997 if ((insn & (0x14 << 21)) == (0x04 << 21))
12998 insn |= 0x02 << 21;
12999 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13000 insn |= 0x08 << 21;
13001 else
13002 break;
13003 }
13004 else
13005 {
13006 /* Invert 'y' bit if not the default. */
13007 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13008 insn ^= 0x01 << 21;
13009 }
13010
13011 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13012 }
13013
13014 /* NOP out calls to undefined weak functions.
13015 We can thus call a weak function without first
13016 checking whether the function is defined. */
13017 else if (h != NULL
13018 && h->elf.root.type == bfd_link_hash_undefweak
13019 && h->elf.dynindx == -1
13020 && r_type == R_PPC64_REL24
13021 && relocation == 0
13022 && addend == 0)
13023 {
13024 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13025 continue;
13026 }
13027 break;
13028 }
13029
13030 /* Set `addend'. */
13031 tls_type = 0;
13032 switch (r_type)
13033 {
13034 default:
13035 info->callbacks->einfo
13036 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
13037 input_bfd, (int) r_type, sym_name);
13038
13039 bfd_set_error (bfd_error_bad_value);
13040 ret = FALSE;
13041 continue;
13042
13043 case R_PPC64_NONE:
13044 case R_PPC64_TLS:
13045 case R_PPC64_TLSGD:
13046 case R_PPC64_TLSLD:
13047 case R_PPC64_TOCSAVE:
13048 case R_PPC64_GNU_VTINHERIT:
13049 case R_PPC64_GNU_VTENTRY:
13050 continue;
13051
13052 /* GOT16 relocations. Like an ADDR16 using the symbol's
13053 address in the GOT as relocation value instead of the
13054 symbol's value itself. Also, create a GOT entry for the
13055 symbol and put the symbol value there. */
13056 case R_PPC64_GOT_TLSGD16:
13057 case R_PPC64_GOT_TLSGD16_LO:
13058 case R_PPC64_GOT_TLSGD16_HI:
13059 case R_PPC64_GOT_TLSGD16_HA:
13060 tls_type = TLS_TLS | TLS_GD;
13061 goto dogot;
13062
13063 case R_PPC64_GOT_TLSLD16:
13064 case R_PPC64_GOT_TLSLD16_LO:
13065 case R_PPC64_GOT_TLSLD16_HI:
13066 case R_PPC64_GOT_TLSLD16_HA:
13067 tls_type = TLS_TLS | TLS_LD;
13068 goto dogot;
13069
13070 case R_PPC64_GOT_TPREL16_DS:
13071 case R_PPC64_GOT_TPREL16_LO_DS:
13072 case R_PPC64_GOT_TPREL16_HI:
13073 case R_PPC64_GOT_TPREL16_HA:
13074 tls_type = TLS_TLS | TLS_TPREL;
13075 goto dogot;
13076
13077 case R_PPC64_GOT_DTPREL16_DS:
13078 case R_PPC64_GOT_DTPREL16_LO_DS:
13079 case R_PPC64_GOT_DTPREL16_HI:
13080 case R_PPC64_GOT_DTPREL16_HA:
13081 tls_type = TLS_TLS | TLS_DTPREL;
13082 goto dogot;
13083
13084 case R_PPC64_GOT16:
13085 case R_PPC64_GOT16_LO:
13086 case R_PPC64_GOT16_HI:
13087 case R_PPC64_GOT16_HA:
13088 case R_PPC64_GOT16_DS:
13089 case R_PPC64_GOT16_LO_DS:
13090 dogot:
13091 {
13092 /* Relocation is to the entry for this symbol in the global
13093 offset table. */
13094 asection *got;
13095 bfd_vma *offp;
13096 bfd_vma off;
13097 unsigned long indx = 0;
13098 struct got_entry *ent;
13099
13100 if (tls_type == (TLS_TLS | TLS_LD)
13101 && (h == NULL
13102 || !h->elf.def_dynamic))
13103 ent = ppc64_tlsld_got (input_bfd);
13104 else
13105 {
13106
13107 if (h != NULL)
13108 {
13109 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13110 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13111 &h->elf)
13112 || (info->shared
13113 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13114 /* This is actually a static link, or it is a
13115 -Bsymbolic link and the symbol is defined
13116 locally, or the symbol was forced to be local
13117 because of a version file. */
13118 ;
13119 else
13120 {
13121 indx = h->elf.dynindx;
13122 unresolved_reloc = FALSE;
13123 }
13124 ent = h->elf.got.glist;
13125 }
13126 else
13127 {
13128 if (local_got_ents == NULL)
13129 abort ();
13130 ent = local_got_ents[r_symndx];
13131 }
13132
13133 for (; ent != NULL; ent = ent->next)
13134 if (ent->addend == orig_addend
13135 && ent->owner == input_bfd
13136 && ent->tls_type == tls_type)
13137 break;
13138 }
13139
13140 if (ent == NULL)
13141 abort ();
13142 if (ent->is_indirect)
13143 ent = ent->got.ent;
13144 offp = &ent->got.offset;
13145 got = ppc64_elf_tdata (ent->owner)->got;
13146 if (got == NULL)
13147 abort ();
13148
13149 /* The offset must always be a multiple of 8. We use the
13150 least significant bit to record whether we have already
13151 processed this entry. */
13152 off = *offp;
13153 if ((off & 1) != 0)
13154 off &= ~1;
13155 else
13156 {
13157 /* Generate relocs for the dynamic linker, except in
13158 the case of TLSLD where we'll use one entry per
13159 module. */
13160 asection *relgot;
13161 bfd_boolean ifunc;
13162
13163 *offp = off | 1;
13164 relgot = NULL;
13165 ifunc = (h != NULL
13166 ? h->elf.type == STT_GNU_IFUNC
13167 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13168 if ((info->shared || indx != 0)
13169 && (h == NULL
13170 || (tls_type == (TLS_TLS | TLS_LD)
13171 && !h->elf.def_dynamic)
13172 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13173 || h->elf.root.type != bfd_link_hash_undefweak))
13174 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13175 else if (ifunc)
13176 relgot = htab->reliplt;
13177 if (relgot != NULL)
13178 {
13179 outrel.r_offset = (got->output_section->vma
13180 + got->output_offset
13181 + off);
13182 outrel.r_addend = addend;
13183 if (tls_type & (TLS_LD | TLS_GD))
13184 {
13185 outrel.r_addend = 0;
13186 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13187 if (tls_type == (TLS_TLS | TLS_GD))
13188 {
13189 loc = relgot->contents;
13190 loc += (relgot->reloc_count++
13191 * sizeof (Elf64_External_Rela));
13192 bfd_elf64_swap_reloca_out (output_bfd,
13193 &outrel, loc);
13194 outrel.r_offset += 8;
13195 outrel.r_addend = addend;
13196 outrel.r_info
13197 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13198 }
13199 }
13200 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13201 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13202 else if (tls_type == (TLS_TLS | TLS_TPREL))
13203 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13204 else if (indx != 0)
13205 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13206 else
13207 {
13208 if (ifunc)
13209 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13210 else
13211 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13212
13213 /* Write the .got section contents for the sake
13214 of prelink. */
13215 loc = got->contents + off;
13216 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13217 loc);
13218 }
13219
13220 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13221 {
13222 outrel.r_addend += relocation;
13223 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13224 outrel.r_addend -= htab->elf.tls_sec->vma;
13225 }
13226 loc = relgot->contents;
13227 loc += (relgot->reloc_count++
13228 * sizeof (Elf64_External_Rela));
13229 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13230 }
13231
13232 /* Init the .got section contents here if we're not
13233 emitting a reloc. */
13234 else
13235 {
13236 relocation += addend;
13237 if (tls_type == (TLS_TLS | TLS_LD))
13238 relocation = 1;
13239 else if (tls_type != 0)
13240 {
13241 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13242 if (tls_type == (TLS_TLS | TLS_TPREL))
13243 relocation += DTP_OFFSET - TP_OFFSET;
13244
13245 if (tls_type == (TLS_TLS | TLS_GD))
13246 {
13247 bfd_put_64 (output_bfd, relocation,
13248 got->contents + off + 8);
13249 relocation = 1;
13250 }
13251 }
13252
13253 bfd_put_64 (output_bfd, relocation,
13254 got->contents + off);
13255 }
13256 }
13257
13258 if (off >= (bfd_vma) -2)
13259 abort ();
13260
13261 relocation = got->output_section->vma + got->output_offset + off;
13262 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13263 }
13264 break;
13265
13266 case R_PPC64_PLT16_HA:
13267 case R_PPC64_PLT16_HI:
13268 case R_PPC64_PLT16_LO:
13269 case R_PPC64_PLT32:
13270 case R_PPC64_PLT64:
13271 /* Relocation is to the entry for this symbol in the
13272 procedure linkage table. */
13273
13274 /* Resolve a PLT reloc against a local symbol directly,
13275 without using the procedure linkage table. */
13276 if (h == NULL)
13277 break;
13278
13279 /* It's possible that we didn't make a PLT entry for this
13280 symbol. This happens when statically linking PIC code,
13281 or when using -Bsymbolic. Go find a match if there is a
13282 PLT entry. */
13283 if (htab->plt != NULL)
13284 {
13285 struct plt_entry *ent;
13286 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13287 if (ent->addend == orig_addend
13288 && ent->plt.offset != (bfd_vma) -1)
13289 {
13290 relocation = (htab->plt->output_section->vma
13291 + htab->plt->output_offset
13292 + ent->plt.offset);
13293 unresolved_reloc = FALSE;
13294 }
13295 }
13296 break;
13297
13298 case R_PPC64_TOC:
13299 /* Relocation value is TOC base. */
13300 relocation = TOCstart;
13301 if (r_symndx == STN_UNDEF)
13302 relocation += htab->stub_group[input_section->id].toc_off;
13303 else if (unresolved_reloc)
13304 ;
13305 else if (sec != NULL && sec->id <= htab->top_id)
13306 relocation += htab->stub_group[sec->id].toc_off;
13307 else
13308 unresolved_reloc = TRUE;
13309 goto dodyn;
13310
13311 /* TOC16 relocs. We want the offset relative to the TOC base,
13312 which is the address of the start of the TOC plus 0x8000.
13313 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13314 in this order. */
13315 case R_PPC64_TOC16:
13316 case R_PPC64_TOC16_LO:
13317 case R_PPC64_TOC16_HI:
13318 case R_PPC64_TOC16_DS:
13319 case R_PPC64_TOC16_LO_DS:
13320 case R_PPC64_TOC16_HA:
13321 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13322 break;
13323
13324 /* Relocate against the beginning of the section. */
13325 case R_PPC64_SECTOFF:
13326 case R_PPC64_SECTOFF_LO:
13327 case R_PPC64_SECTOFF_HI:
13328 case R_PPC64_SECTOFF_DS:
13329 case R_PPC64_SECTOFF_LO_DS:
13330 case R_PPC64_SECTOFF_HA:
13331 if (sec != NULL)
13332 addend -= sec->output_section->vma;
13333 break;
13334
13335 case R_PPC64_REL16:
13336 case R_PPC64_REL16_LO:
13337 case R_PPC64_REL16_HI:
13338 case R_PPC64_REL16_HA:
13339 break;
13340
13341 case R_PPC64_REL14:
13342 case R_PPC64_REL14_BRNTAKEN:
13343 case R_PPC64_REL14_BRTAKEN:
13344 case R_PPC64_REL24:
13345 break;
13346
13347 case R_PPC64_TPREL16:
13348 case R_PPC64_TPREL16_LO:
13349 case R_PPC64_TPREL16_HI:
13350 case R_PPC64_TPREL16_HA:
13351 case R_PPC64_TPREL16_DS:
13352 case R_PPC64_TPREL16_LO_DS:
13353 case R_PPC64_TPREL16_HIGHER:
13354 case R_PPC64_TPREL16_HIGHERA:
13355 case R_PPC64_TPREL16_HIGHEST:
13356 case R_PPC64_TPREL16_HIGHESTA:
13357 if (h != NULL
13358 && h->elf.root.type == bfd_link_hash_undefweak
13359 && h->elf.dynindx == -1)
13360 {
13361 /* Make this relocation against an undefined weak symbol
13362 resolve to zero. This is really just a tweak, since
13363 code using weak externs ought to check that they are
13364 defined before using them. */
13365 bfd_byte *p = contents + rel->r_offset - d_offset;
13366
13367 insn = bfd_get_32 (output_bfd, p);
13368 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13369 if (insn != 0)
13370 bfd_put_32 (output_bfd, insn, p);
13371 break;
13372 }
13373 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13374 if (info->shared)
13375 /* The TPREL16 relocs shouldn't really be used in shared
13376 libs as they will result in DT_TEXTREL being set, but
13377 support them anyway. */
13378 goto dodyn;
13379 break;
13380
13381 case R_PPC64_DTPREL16:
13382 case R_PPC64_DTPREL16_LO:
13383 case R_PPC64_DTPREL16_HI:
13384 case R_PPC64_DTPREL16_HA:
13385 case R_PPC64_DTPREL16_DS:
13386 case R_PPC64_DTPREL16_LO_DS:
13387 case R_PPC64_DTPREL16_HIGHER:
13388 case R_PPC64_DTPREL16_HIGHERA:
13389 case R_PPC64_DTPREL16_HIGHEST:
13390 case R_PPC64_DTPREL16_HIGHESTA:
13391 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13392 break;
13393
13394 case R_PPC64_DTPMOD64:
13395 relocation = 1;
13396 addend = 0;
13397 goto dodyn;
13398
13399 case R_PPC64_TPREL64:
13400 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13401 goto dodyn;
13402
13403 case R_PPC64_DTPREL64:
13404 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13405 /* Fall thru */
13406
13407 /* Relocations that may need to be propagated if this is a
13408 dynamic object. */
13409 case R_PPC64_REL30:
13410 case R_PPC64_REL32:
13411 case R_PPC64_REL64:
13412 case R_PPC64_ADDR14:
13413 case R_PPC64_ADDR14_BRNTAKEN:
13414 case R_PPC64_ADDR14_BRTAKEN:
13415 case R_PPC64_ADDR16:
13416 case R_PPC64_ADDR16_DS:
13417 case R_PPC64_ADDR16_HA:
13418 case R_PPC64_ADDR16_HI:
13419 case R_PPC64_ADDR16_HIGHER:
13420 case R_PPC64_ADDR16_HIGHERA:
13421 case R_PPC64_ADDR16_HIGHEST:
13422 case R_PPC64_ADDR16_HIGHESTA:
13423 case R_PPC64_ADDR16_LO:
13424 case R_PPC64_ADDR16_LO_DS:
13425 case R_PPC64_ADDR24:
13426 case R_PPC64_ADDR32:
13427 case R_PPC64_ADDR64:
13428 case R_PPC64_UADDR16:
13429 case R_PPC64_UADDR32:
13430 case R_PPC64_UADDR64:
13431 dodyn:
13432 if ((input_section->flags & SEC_ALLOC) == 0)
13433 break;
13434
13435 if (NO_OPD_RELOCS && is_opd)
13436 break;
13437
13438 if ((info->shared
13439 && (h == NULL
13440 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13441 || h->elf.root.type != bfd_link_hash_undefweak)
13442 && (must_be_dyn_reloc (info, r_type)
13443 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13444 || (ELIMINATE_COPY_RELOCS
13445 && !info->shared
13446 && h != NULL
13447 && h->elf.dynindx != -1
13448 && !h->elf.non_got_ref
13449 && !h->elf.def_regular)
13450 || (!info->shared
13451 && (h != NULL
13452 ? h->elf.type == STT_GNU_IFUNC
13453 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13454 {
13455 bfd_boolean skip, relocate;
13456 asection *sreloc;
13457 bfd_vma out_off;
13458
13459 /* When generating a dynamic object, these relocations
13460 are copied into the output file to be resolved at run
13461 time. */
13462
13463 skip = FALSE;
13464 relocate = FALSE;
13465
13466 out_off = _bfd_elf_section_offset (output_bfd, info,
13467 input_section, rel->r_offset);
13468 if (out_off == (bfd_vma) -1)
13469 skip = TRUE;
13470 else if (out_off == (bfd_vma) -2)
13471 skip = TRUE, relocate = TRUE;
13472 out_off += (input_section->output_section->vma
13473 + input_section->output_offset);
13474 outrel.r_offset = out_off;
13475 outrel.r_addend = rel->r_addend;
13476
13477 /* Optimize unaligned reloc use. */
13478 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13479 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13480 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13481 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13482 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13483 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13484 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13485 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13486 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13487
13488 if (skip)
13489 memset (&outrel, 0, sizeof outrel);
13490 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13491 && !is_opd
13492 && r_type != R_PPC64_TOC)
13493 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13494 else
13495 {
13496 /* This symbol is local, or marked to become local,
13497 or this is an opd section reloc which must point
13498 at a local function. */
13499 outrel.r_addend += relocation;
13500 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13501 {
13502 if (is_opd && h != NULL)
13503 {
13504 /* Lie about opd entries. This case occurs
13505 when building shared libraries and we
13506 reference a function in another shared
13507 lib. The same thing happens for a weak
13508 definition in an application that's
13509 overridden by a strong definition in a
13510 shared lib. (I believe this is a generic
13511 bug in binutils handling of weak syms.)
13512 In these cases we won't use the opd
13513 entry in this lib. */
13514 unresolved_reloc = FALSE;
13515 }
13516 if (!is_opd
13517 && r_type == R_PPC64_ADDR64
13518 && (h != NULL
13519 ? h->elf.type == STT_GNU_IFUNC
13520 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13521 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13522 else
13523 {
13524 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13525
13526 /* We need to relocate .opd contents for ld.so.
13527 Prelink also wants simple and consistent rules
13528 for relocs. This make all RELATIVE relocs have
13529 *r_offset equal to r_addend. */
13530 relocate = TRUE;
13531 }
13532 }
13533 else
13534 {
13535 long indx = 0;
13536
13537 if (h != NULL
13538 ? h->elf.type == STT_GNU_IFUNC
13539 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13540 {
13541 info->callbacks->einfo
13542 (_("%P: %H: relocation %s for indirect "
13543 "function %s unsupported\n"),
13544 input_bfd, input_section, rel->r_offset,
13545 ppc64_elf_howto_table[r_type]->name,
13546 sym_name);
13547 ret = FALSE;
13548 }
13549 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13550 ;
13551 else if (sec == NULL || sec->owner == NULL)
13552 {
13553 bfd_set_error (bfd_error_bad_value);
13554 return FALSE;
13555 }
13556 else
13557 {
13558 asection *osec;
13559
13560 osec = sec->output_section;
13561 indx = elf_section_data (osec)->dynindx;
13562
13563 if (indx == 0)
13564 {
13565 if ((osec->flags & SEC_READONLY) == 0
13566 && htab->elf.data_index_section != NULL)
13567 osec = htab->elf.data_index_section;
13568 else
13569 osec = htab->elf.text_index_section;
13570 indx = elf_section_data (osec)->dynindx;
13571 }
13572 BFD_ASSERT (indx != 0);
13573
13574 /* We are turning this relocation into one
13575 against a section symbol, so subtract out
13576 the output section's address but not the
13577 offset of the input section in the output
13578 section. */
13579 outrel.r_addend -= osec->vma;
13580 }
13581
13582 outrel.r_info = ELF64_R_INFO (indx, r_type);
13583 }
13584 }
13585
13586 sreloc = elf_section_data (input_section)->sreloc;
13587 if (!htab->elf.dynamic_sections_created)
13588 sreloc = htab->reliplt;
13589 if (sreloc == NULL)
13590 abort ();
13591
13592 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13593 >= sreloc->size)
13594 abort ();
13595 loc = sreloc->contents;
13596 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13597 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13598
13599 /* If this reloc is against an external symbol, it will
13600 be computed at runtime, so there's no need to do
13601 anything now. However, for the sake of prelink ensure
13602 that the section contents are a known value. */
13603 if (! relocate)
13604 {
13605 unresolved_reloc = FALSE;
13606 /* The value chosen here is quite arbitrary as ld.so
13607 ignores section contents except for the special
13608 case of .opd where the contents might be accessed
13609 before relocation. Choose zero, as that won't
13610 cause reloc overflow. */
13611 relocation = 0;
13612 addend = 0;
13613 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13614 to improve backward compatibility with older
13615 versions of ld. */
13616 if (r_type == R_PPC64_ADDR64)
13617 addend = outrel.r_addend;
13618 /* Adjust pc_relative relocs to have zero in *r_offset. */
13619 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13620 addend = (input_section->output_section->vma
13621 + input_section->output_offset
13622 + rel->r_offset);
13623 }
13624 }
13625 break;
13626
13627 case R_PPC64_COPY:
13628 case R_PPC64_GLOB_DAT:
13629 case R_PPC64_JMP_SLOT:
13630 case R_PPC64_JMP_IREL:
13631 case R_PPC64_RELATIVE:
13632 /* We shouldn't ever see these dynamic relocs in relocatable
13633 files. */
13634 /* Fall through. */
13635
13636 case R_PPC64_PLTGOT16:
13637 case R_PPC64_PLTGOT16_DS:
13638 case R_PPC64_PLTGOT16_HA:
13639 case R_PPC64_PLTGOT16_HI:
13640 case R_PPC64_PLTGOT16_LO:
13641 case R_PPC64_PLTGOT16_LO_DS:
13642 case R_PPC64_PLTREL32:
13643 case R_PPC64_PLTREL64:
13644 /* These ones haven't been implemented yet. */
13645
13646 info->callbacks->einfo
13647 (_("%P: %B: relocation %s is not supported for symbol %s\n"),
13648 input_bfd,
13649 ppc64_elf_howto_table[r_type]->name, sym_name);
13650
13651 bfd_set_error (bfd_error_invalid_operation);
13652 ret = FALSE;
13653 continue;
13654 }
13655
13656 /* Multi-instruction sequences that access the TOC can be
13657 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13658 to nop; addi rb,r2,x; */
13659 switch (r_type)
13660 {
13661 default:
13662 break;
13663
13664 case R_PPC64_GOT_TLSLD16_HI:
13665 case R_PPC64_GOT_TLSGD16_HI:
13666 case R_PPC64_GOT_TPREL16_HI:
13667 case R_PPC64_GOT_DTPREL16_HI:
13668 case R_PPC64_GOT16_HI:
13669 case R_PPC64_TOC16_HI:
13670 /* These relocs would only be useful if building up an
13671 offset to later add to r2, perhaps in an indexed
13672 addressing mode instruction. Don't try to optimize.
13673 Unfortunately, the possibility of someone building up an
13674 offset like this or even with the HA relocs, means that
13675 we need to check the high insn when optimizing the low
13676 insn. */
13677 break;
13678
13679 case R_PPC64_GOT_TLSLD16_HA:
13680 case R_PPC64_GOT_TLSGD16_HA:
13681 case R_PPC64_GOT_TPREL16_HA:
13682 case R_PPC64_GOT_DTPREL16_HA:
13683 case R_PPC64_GOT16_HA:
13684 case R_PPC64_TOC16_HA:
13685 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13686 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13687 {
13688 bfd_byte *p = contents + (rel->r_offset & ~3);
13689 bfd_put_32 (input_bfd, NOP, p);
13690 }
13691 break;
13692
13693 case R_PPC64_GOT_TLSLD16_LO:
13694 case R_PPC64_GOT_TLSGD16_LO:
13695 case R_PPC64_GOT_TPREL16_LO_DS:
13696 case R_PPC64_GOT_DTPREL16_LO_DS:
13697 case R_PPC64_GOT16_LO:
13698 case R_PPC64_GOT16_LO_DS:
13699 case R_PPC64_TOC16_LO:
13700 case R_PPC64_TOC16_LO_DS:
13701 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13702 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13703 {
13704 bfd_byte *p = contents + (rel->r_offset & ~3);
13705 insn = bfd_get_32 (input_bfd, p);
13706 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13707 {
13708 /* Transform addic to addi when we change reg. */
13709 insn &= ~((0x3f << 26) | (0x1f << 16));
13710 insn |= (14u << 26) | (2 << 16);
13711 }
13712 else
13713 {
13714 insn &= ~(0x1f << 16);
13715 insn |= 2 << 16;
13716 }
13717 bfd_put_32 (input_bfd, insn, p);
13718 }
13719 break;
13720 }
13721
13722 /* Do any further special processing. */
13723 switch (r_type)
13724 {
13725 default:
13726 break;
13727
13728 case R_PPC64_ADDR16_HA:
13729 case R_PPC64_REL16_HA:
13730 case R_PPC64_ADDR16_HIGHERA:
13731 case R_PPC64_ADDR16_HIGHESTA:
13732 case R_PPC64_TOC16_HA:
13733 case R_PPC64_SECTOFF_HA:
13734 case R_PPC64_TPREL16_HA:
13735 case R_PPC64_DTPREL16_HA:
13736 case R_PPC64_TPREL16_HIGHER:
13737 case R_PPC64_TPREL16_HIGHERA:
13738 case R_PPC64_TPREL16_HIGHEST:
13739 case R_PPC64_TPREL16_HIGHESTA:
13740 case R_PPC64_DTPREL16_HIGHER:
13741 case R_PPC64_DTPREL16_HIGHERA:
13742 case R_PPC64_DTPREL16_HIGHEST:
13743 case R_PPC64_DTPREL16_HIGHESTA:
13744 /* It's just possible that this symbol is a weak symbol
13745 that's not actually defined anywhere. In that case,
13746 'sec' would be NULL, and we should leave the symbol
13747 alone (it will be set to zero elsewhere in the link). */
13748 if (sec == NULL)
13749 break;
13750 /* Fall thru */
13751
13752 case R_PPC64_GOT16_HA:
13753 case R_PPC64_PLTGOT16_HA:
13754 case R_PPC64_PLT16_HA:
13755 case R_PPC64_GOT_TLSGD16_HA:
13756 case R_PPC64_GOT_TLSLD16_HA:
13757 case R_PPC64_GOT_TPREL16_HA:
13758 case R_PPC64_GOT_DTPREL16_HA:
13759 /* Add 0x10000 if sign bit in 0:15 is set.
13760 Bits 0:15 are not used. */
13761 addend += 0x8000;
13762 break;
13763
13764 case R_PPC64_ADDR16_DS:
13765 case R_PPC64_ADDR16_LO_DS:
13766 case R_PPC64_GOT16_DS:
13767 case R_PPC64_GOT16_LO_DS:
13768 case R_PPC64_PLT16_LO_DS:
13769 case R_PPC64_SECTOFF_DS:
13770 case R_PPC64_SECTOFF_LO_DS:
13771 case R_PPC64_TOC16_DS:
13772 case R_PPC64_TOC16_LO_DS:
13773 case R_PPC64_PLTGOT16_DS:
13774 case R_PPC64_PLTGOT16_LO_DS:
13775 case R_PPC64_GOT_TPREL16_DS:
13776 case R_PPC64_GOT_TPREL16_LO_DS:
13777 case R_PPC64_GOT_DTPREL16_DS:
13778 case R_PPC64_GOT_DTPREL16_LO_DS:
13779 case R_PPC64_TPREL16_DS:
13780 case R_PPC64_TPREL16_LO_DS:
13781 case R_PPC64_DTPREL16_DS:
13782 case R_PPC64_DTPREL16_LO_DS:
13783 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13784 mask = 3;
13785 /* If this reloc is against an lq insn, then the value must be
13786 a multiple of 16. This is somewhat of a hack, but the
13787 "correct" way to do this by defining _DQ forms of all the
13788 _DS relocs bloats all reloc switches in this file. It
13789 doesn't seem to make much sense to use any of these relocs
13790 in data, so testing the insn should be safe. */
13791 if ((insn & (0x3f << 26)) == (56u << 26))
13792 mask = 15;
13793 if (((relocation + addend) & mask) != 0)
13794 {
13795 info->callbacks->einfo
13796 (_("%P: %H: error: %s not a multiple of %u\n"),
13797 input_bfd, input_section, rel->r_offset,
13798 ppc64_elf_howto_table[r_type]->name,
13799 mask + 1);
13800 bfd_set_error (bfd_error_bad_value);
13801 ret = FALSE;
13802 continue;
13803 }
13804 break;
13805 }
13806
13807 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13808 because such sections are not SEC_ALLOC and thus ld.so will
13809 not process them. */
13810 if (unresolved_reloc
13811 && !((input_section->flags & SEC_DEBUGGING) != 0
13812 && h->elf.def_dynamic)
13813 && _bfd_elf_section_offset (output_bfd, info, input_section,
13814 rel->r_offset) != (bfd_vma) -1)
13815 {
13816 info->callbacks->einfo
13817 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
13818 input_bfd, input_section, rel->r_offset,
13819 ppc64_elf_howto_table[(int) r_type]->name,
13820 h->elf.root.root.string);
13821 ret = FALSE;
13822 }
13823
13824 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13825 input_bfd,
13826 input_section,
13827 contents,
13828 rel->r_offset,
13829 relocation,
13830 addend);
13831
13832 if (r != bfd_reloc_ok)
13833 {
13834 if (sym_name == NULL)
13835 sym_name = "(null)";
13836 if (r == bfd_reloc_overflow)
13837 {
13838 if (warned)
13839 continue;
13840 if (h != NULL
13841 && h->elf.root.type == bfd_link_hash_undefweak
13842 && ppc64_elf_howto_table[r_type]->pc_relative)
13843 {
13844 /* Assume this is a call protected by other code that
13845 detects the symbol is undefined. If this is the case,
13846 we can safely ignore the overflow. If not, the
13847 program is hosed anyway, and a little warning isn't
13848 going to help. */
13849
13850 continue;
13851 }
13852
13853 if (!((*info->callbacks->reloc_overflow)
13854 (info, (h ? &h->elf.root : NULL), sym_name,
13855 ppc64_elf_howto_table[r_type]->name,
13856 orig_addend, input_bfd, input_section, rel->r_offset)))
13857 return FALSE;
13858 }
13859 else
13860 {
13861 info->callbacks->einfo
13862 (_("%P: %H: %s reloc against `%s': error %d\n"),
13863 input_bfd, input_section, rel->r_offset,
13864 ppc64_elf_howto_table[r_type]->name,
13865 sym_name,
13866 (int) r);
13867 ret = FALSE;
13868 }
13869 }
13870 }
13871
13872 /* If we're emitting relocations, then shortly after this function
13873 returns, reloc offsets and addends for this section will be
13874 adjusted. Worse, reloc symbol indices will be for the output
13875 file rather than the input. Save a copy of the relocs for
13876 opd_entry_value. */
13877 if (is_opd && (info->emitrelocations || info->relocatable))
13878 {
13879 bfd_size_type amt;
13880 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13881 rel = bfd_alloc (input_bfd, amt);
13882 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13883 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13884 if (rel == NULL)
13885 return FALSE;
13886 memcpy (rel, relocs, amt);
13887 }
13888 return ret;
13889 }
13890
13891 /* Adjust the value of any local symbols in opd sections. */
13892
13893 static int
13894 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13895 const char *name ATTRIBUTE_UNUSED,
13896 Elf_Internal_Sym *elfsym,
13897 asection *input_sec,
13898 struct elf_link_hash_entry *h)
13899 {
13900 struct _opd_sec_data *opd;
13901 long adjust;
13902 bfd_vma value;
13903
13904 if (h != NULL)
13905 return 1;
13906
13907 opd = get_opd_info (input_sec);
13908 if (opd == NULL || opd->adjust == NULL)
13909 return 1;
13910
13911 value = elfsym->st_value - input_sec->output_offset;
13912 if (!info->relocatable)
13913 value -= input_sec->output_section->vma;
13914
13915 adjust = opd->adjust[value / 8];
13916 if (adjust == -1)
13917 return 2;
13918
13919 elfsym->st_value += adjust;
13920 return 1;
13921 }
13922
13923 /* Finish up dynamic symbol handling. We set the contents of various
13924 dynamic sections here. */
13925
13926 static bfd_boolean
13927 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13928 struct bfd_link_info *info,
13929 struct elf_link_hash_entry *h,
13930 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
13931 {
13932 struct ppc_link_hash_table *htab;
13933 struct plt_entry *ent;
13934 Elf_Internal_Rela rela;
13935 bfd_byte *loc;
13936
13937 htab = ppc_hash_table (info);
13938 if (htab == NULL)
13939 return FALSE;
13940
13941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13942 if (ent->plt.offset != (bfd_vma) -1)
13943 {
13944 /* This symbol has an entry in the procedure linkage
13945 table. Set it up. */
13946 if (!htab->elf.dynamic_sections_created
13947 || h->dynindx == -1)
13948 {
13949 BFD_ASSERT (h->type == STT_GNU_IFUNC
13950 && h->def_regular
13951 && (h->root.type == bfd_link_hash_defined
13952 || h->root.type == bfd_link_hash_defweak));
13953 rela.r_offset = (htab->iplt->output_section->vma
13954 + htab->iplt->output_offset
13955 + ent->plt.offset);
13956 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13957 rela.r_addend = (h->root.u.def.value
13958 + h->root.u.def.section->output_offset
13959 + h->root.u.def.section->output_section->vma
13960 + ent->addend);
13961 loc = (htab->reliplt->contents
13962 + (htab->reliplt->reloc_count++
13963 * sizeof (Elf64_External_Rela)));
13964 }
13965 else
13966 {
13967 rela.r_offset = (htab->plt->output_section->vma
13968 + htab->plt->output_offset
13969 + ent->plt.offset);
13970 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13971 rela.r_addend = ent->addend;
13972 loc = (htab->relplt->contents
13973 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13974 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13975 }
13976 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13977 }
13978
13979 if (h->needs_copy)
13980 {
13981 /* This symbol needs a copy reloc. Set it up. */
13982
13983 if (h->dynindx == -1
13984 || (h->root.type != bfd_link_hash_defined
13985 && h->root.type != bfd_link_hash_defweak)
13986 || htab->relbss == NULL)
13987 abort ();
13988
13989 rela.r_offset = (h->root.u.def.value
13990 + h->root.u.def.section->output_section->vma
13991 + h->root.u.def.section->output_offset);
13992 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13993 rela.r_addend = 0;
13994 loc = htab->relbss->contents;
13995 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13996 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13997 }
13998
13999 return TRUE;
14000 }
14001
14002 /* Used to decide how to sort relocs in an optimal manner for the
14003 dynamic linker, before writing them out. */
14004
14005 static enum elf_reloc_type_class
14006 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
14007 {
14008 enum elf_ppc64_reloc_type r_type;
14009
14010 r_type = ELF64_R_TYPE (rela->r_info);
14011 switch (r_type)
14012 {
14013 case R_PPC64_RELATIVE:
14014 return reloc_class_relative;
14015 case R_PPC64_JMP_SLOT:
14016 return reloc_class_plt;
14017 case R_PPC64_COPY:
14018 return reloc_class_copy;
14019 default:
14020 return reloc_class_normal;
14021 }
14022 }
14023
14024 /* Finish up the dynamic sections. */
14025
14026 static bfd_boolean
14027 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14028 struct bfd_link_info *info)
14029 {
14030 struct ppc_link_hash_table *htab;
14031 bfd *dynobj;
14032 asection *sdyn;
14033
14034 htab = ppc_hash_table (info);
14035 if (htab == NULL)
14036 return FALSE;
14037
14038 dynobj = htab->elf.dynobj;
14039 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14040
14041 if (htab->elf.dynamic_sections_created)
14042 {
14043 Elf64_External_Dyn *dyncon, *dynconend;
14044
14045 if (sdyn == NULL || htab->got == NULL)
14046 abort ();
14047
14048 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14049 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14050 for (; dyncon < dynconend; dyncon++)
14051 {
14052 Elf_Internal_Dyn dyn;
14053 asection *s;
14054
14055 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14056
14057 switch (dyn.d_tag)
14058 {
14059 default:
14060 continue;
14061
14062 case DT_PPC64_GLINK:
14063 s = htab->glink;
14064 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14065 /* We stupidly defined DT_PPC64_GLINK to be the start
14066 of glink rather than the first entry point, which is
14067 what ld.so needs, and now have a bigger stub to
14068 support automatic multiple TOCs. */
14069 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14070 break;
14071
14072 case DT_PPC64_OPD:
14073 s = bfd_get_section_by_name (output_bfd, ".opd");
14074 if (s == NULL)
14075 continue;
14076 dyn.d_un.d_ptr = s->vma;
14077 break;
14078
14079 case DT_PPC64_OPDSZ:
14080 s = bfd_get_section_by_name (output_bfd, ".opd");
14081 if (s == NULL)
14082 continue;
14083 dyn.d_un.d_val = s->size;
14084 break;
14085
14086 case DT_PLTGOT:
14087 s = htab->plt;
14088 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14089 break;
14090
14091 case DT_JMPREL:
14092 s = htab->relplt;
14093 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14094 break;
14095
14096 case DT_PLTRELSZ:
14097 dyn.d_un.d_val = htab->relplt->size;
14098 break;
14099
14100 case DT_RELASZ:
14101 /* Don't count procedure linkage table relocs in the
14102 overall reloc count. */
14103 s = htab->relplt;
14104 if (s == NULL)
14105 continue;
14106 dyn.d_un.d_val -= s->size;
14107 break;
14108
14109 case DT_RELA:
14110 /* We may not be using the standard ELF linker script.
14111 If .rela.plt is the first .rela section, we adjust
14112 DT_RELA to not include it. */
14113 s = htab->relplt;
14114 if (s == NULL)
14115 continue;
14116 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14117 continue;
14118 dyn.d_un.d_ptr += s->size;
14119 break;
14120 }
14121
14122 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14123 }
14124 }
14125
14126 if (htab->got != NULL && htab->got->size != 0)
14127 {
14128 /* Fill in the first entry in the global offset table.
14129 We use it to hold the link-time TOCbase. */
14130 bfd_put_64 (output_bfd,
14131 elf_gp (output_bfd) + TOC_BASE_OFF,
14132 htab->got->contents);
14133
14134 /* Set .got entry size. */
14135 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14136 }
14137
14138 if (htab->plt != NULL && htab->plt->size != 0)
14139 {
14140 /* Set .plt entry size. */
14141 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14142 = PLT_ENTRY_SIZE;
14143 }
14144
14145 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14146 brlt ourselves if emitrelocations. */
14147 if (htab->brlt != NULL
14148 && htab->brlt->reloc_count != 0
14149 && !_bfd_elf_link_output_relocs (output_bfd,
14150 htab->brlt,
14151 elf_section_data (htab->brlt)->rela.hdr,
14152 elf_section_data (htab->brlt)->relocs,
14153 NULL))
14154 return FALSE;
14155
14156 if (htab->glink != NULL
14157 && htab->glink->reloc_count != 0
14158 && !_bfd_elf_link_output_relocs (output_bfd,
14159 htab->glink,
14160 elf_section_data (htab->glink)->rela.hdr,
14161 elf_section_data (htab->glink)->relocs,
14162 NULL))
14163 return FALSE;
14164
14165
14166 if (htab->glink_eh_frame != NULL
14167 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14168 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14169 htab->glink_eh_frame,
14170 htab->glink_eh_frame->contents))
14171 return FALSE;
14172
14173 /* We need to handle writing out multiple GOT sections ourselves,
14174 since we didn't add them to DYNOBJ. We know dynobj is the first
14175 bfd. */
14176 while ((dynobj = dynobj->link_next) != NULL)
14177 {
14178 asection *s;
14179
14180 if (!is_ppc64_elf (dynobj))
14181 continue;
14182
14183 s = ppc64_elf_tdata (dynobj)->got;
14184 if (s != NULL
14185 && s->size != 0
14186 && s->output_section != bfd_abs_section_ptr
14187 && !bfd_set_section_contents (output_bfd, s->output_section,
14188 s->contents, s->output_offset,
14189 s->size))
14190 return FALSE;
14191 s = ppc64_elf_tdata (dynobj)->relgot;
14192 if (s != NULL
14193 && s->size != 0
14194 && s->output_section != bfd_abs_section_ptr
14195 && !bfd_set_section_contents (output_bfd, s->output_section,
14196 s->contents, s->output_offset,
14197 s->size))
14198 return FALSE;
14199 }
14200
14201 return TRUE;
14202 }
14203
14204 #include "elf64-target.h"
14205
14206 /* FreeBSD support */
14207
14208 #undef TARGET_LITTLE_SYM
14209 #undef TARGET_LITTLE_NAME
14210
14211 #undef TARGET_BIG_SYM
14212 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14213 #undef TARGET_BIG_NAME
14214 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14215
14216 #undef ELF_OSABI
14217 #define ELF_OSABI ELFOSABI_FREEBSD
14218
14219 #undef elf64_bed
14220 #define elf64_bed elf64_powerpc_fbsd_bed
14221
14222 #include "elf64-target.h"
14223
The GNU Binutils are a collection of binary tools.