?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* elf64-ppc.c (STD_R0_0R1, STD_R0_0R12, LD_R0_0R1, LD_R0_0R12,
[binutils.git] / bfd / elf64-ppc.c
blob91f4619efd7dc7ad38d93882c9af5b8e75b5bf2e
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 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 <amodra@bigpond.net.au>
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 2 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 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])));
2123 cache_ptr->howto = ppc64_elf_howto_table[type];
2124 }
2125
2126 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 /* If this is a relocatable link (output_bfd test tells us), just
2134 call the generic function. Any adjustment will be done at final
2135 link time. */
2136 if (output_bfd != NULL)
2137 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2138 input_section, output_bfd, error_message);
2139
2140 /* Adjust the addend for sign extension of the low 16 bits.
2141 We won't actually be using the low 16 bits, so trashing them
2142 doesn't matter. */
2143 reloc_entry->addend += 0x8000;
2144 return bfd_reloc_continue;
2145 }
2146
2147 static bfd_reloc_status_type
2148 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2149 void *data, asection *input_section,
2150 bfd *output_bfd, char **error_message)
2151 {
2152 if (output_bfd != NULL)
2153 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2154 input_section, output_bfd, error_message);
2155
2156 if (strcmp (symbol->section->name, ".opd") == 0)
2157 {
2158 bfd_vma dest = opd_entry_value (symbol->section,
2159 symbol->value + reloc_entry->addend,
2160 NULL, NULL);
2161 if (dest != (bfd_vma) -1)
2162 reloc_entry->addend = dest - (symbol->value
2163 + symbol->section->output_section->vma
2164 + symbol->section->output_offset);
2165 }
2166 return bfd_reloc_continue;
2167 }
2168
2169 static bfd_reloc_status_type
2170 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2171 void *data, asection *input_section,
2172 bfd *output_bfd, char **error_message)
2173 {
2174 long insn;
2175 enum elf_ppc64_reloc_type r_type;
2176 bfd_size_type octets;
2177 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2178 bfd_boolean is_power4 = FALSE;
2179
2180 /* If this is a relocatable link (output_bfd test tells us), just
2181 call the generic function. Any adjustment will be done at final
2182 link time. */
2183 if (output_bfd != NULL)
2184 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2185 input_section, output_bfd, error_message);
2186
2187 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2188 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2189 insn &= ~(0x01 << 21);
2190 r_type = reloc_entry->howto->type;
2191 if (r_type == R_PPC64_ADDR14_BRTAKEN
2192 || r_type == R_PPC64_REL14_BRTAKEN)
2193 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2194
2195 if (is_power4)
2196 {
2197 /* Set 'a' bit. This is 0b00010 in BO field for branch
2198 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2199 for branch on CTR insns (BO == 1a00t or 1a01t). */
2200 if ((insn & (0x14 << 21)) == (0x04 << 21))
2201 insn |= 0x02 << 21;
2202 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2203 insn |= 0x08 << 21;
2204 else
2205 goto out;
2206 }
2207 else
2208 {
2209 bfd_vma target = 0;
2210 bfd_vma from;
2211
2212 if (!bfd_is_com_section (symbol->section))
2213 target = symbol->value;
2214 target += symbol->section->output_section->vma;
2215 target += symbol->section->output_offset;
2216 target += reloc_entry->addend;
2217
2218 from = (reloc_entry->address
2219 + input_section->output_offset
2220 + input_section->output_section->vma);
2221
2222 /* Invert 'y' bit if not the default. */
2223 if ((bfd_signed_vma) (target - from) < 0)
2224 insn ^= 0x01 << 21;
2225 }
2226 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2227 out:
2228 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2229 input_section, output_bfd, error_message);
2230 }
2231
2232 static bfd_reloc_status_type
2233 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2234 void *data, asection *input_section,
2235 bfd *output_bfd, char **error_message)
2236 {
2237 /* If this is a relocatable link (output_bfd test tells us), just
2238 call the generic function. Any adjustment will be done at final
2239 link time. */
2240 if (output_bfd != NULL)
2241 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2242 input_section, output_bfd, error_message);
2243
2244 /* Subtract the symbol section base address. */
2245 reloc_entry->addend -= symbol->section->output_section->vma;
2246 return bfd_reloc_continue;
2247 }
2248
2249 static bfd_reloc_status_type
2250 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2251 void *data, asection *input_section,
2252 bfd *output_bfd, char **error_message)
2253 {
2254 /* If this is a relocatable link (output_bfd test tells us), just
2255 call the generic function. Any adjustment will be done at final
2256 link time. */
2257 if (output_bfd != NULL)
2258 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2259 input_section, output_bfd, error_message);
2260
2261 /* Subtract the symbol section base address. */
2262 reloc_entry->addend -= symbol->section->output_section->vma;
2263
2264 /* Adjust the addend for sign extension of the low 16 bits. */
2265 reloc_entry->addend += 0x8000;
2266 return bfd_reloc_continue;
2267 }
2268
2269 static bfd_reloc_status_type
2270 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2271 void *data, asection *input_section,
2272 bfd *output_bfd, char **error_message)
2273 {
2274 bfd_vma TOCstart;
2275
2276 /* If this is a relocatable link (output_bfd test tells us), just
2277 call the generic function. Any adjustment will be done at final
2278 link time. */
2279 if (output_bfd != NULL)
2280 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2281 input_section, output_bfd, error_message);
2282
2283 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2284 if (TOCstart == 0)
2285 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2286
2287 /* Subtract the TOC base address. */
2288 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2289 return bfd_reloc_continue;
2290 }
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 bfd_vma TOCstart;
2298
2299 /* If this is a relocatable link (output_bfd test tells us), just
2300 call the generic function. Any adjustment will be done at final
2301 link time. */
2302 if (output_bfd != NULL)
2303 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2304 input_section, output_bfd, error_message);
2305
2306 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2307 if (TOCstart == 0)
2308 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2309
2310 /* Subtract the TOC base address. */
2311 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2312
2313 /* Adjust the addend for sign extension of the low 16 bits. */
2314 reloc_entry->addend += 0x8000;
2315 return bfd_reloc_continue;
2316 }
2317
2318 static bfd_reloc_status_type
2319 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2320 void *data, asection *input_section,
2321 bfd *output_bfd, char **error_message)
2322 {
2323 bfd_vma TOCstart;
2324 bfd_size_type octets;
2325
2326 /* If this is a relocatable link (output_bfd test tells us), just
2327 call the generic function. Any adjustment will be done at final
2328 link time. */
2329 if (output_bfd != NULL)
2330 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2331 input_section, output_bfd, error_message);
2332
2333 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2334 if (TOCstart == 0)
2335 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2336
2337 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2338 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2339 return bfd_reloc_ok;
2340 }
2341
2342 static bfd_reloc_status_type
2343 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2344 void *data, asection *input_section,
2345 bfd *output_bfd, char **error_message)
2346 {
2347 /* If this is a relocatable link (output_bfd test tells us), just
2348 call the generic function. Any adjustment will be done at final
2349 link time. */
2350 if (output_bfd != NULL)
2351 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2352 input_section, output_bfd, error_message);
2353
2354 if (error_message != NULL)
2355 {
2356 static char buf[60];
2357 sprintf (buf, "generic linker can't handle %s",
2358 reloc_entry->howto->name);
2359 *error_message = buf;
2360 }
2361 return bfd_reloc_dangerous;
2362 }
2363
2364 struct ppc64_elf_obj_tdata
2365 {
2366 struct elf_obj_tdata elf;
2367
2368 /* Shortcuts to dynamic linker sections. */
2369 asection *got;
2370 asection *relgot;
2371
2372 /* Used during garbage collection. We attach global symbols defined
2373 on removed .opd entries to this section so that the sym is removed. */
2374 asection *deleted_section;
2375
2376 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2377 sections means we potentially need one of these for each input bfd. */
2378 union {
2379 bfd_signed_vma refcount;
2380 bfd_vma offset;
2381 } tlsld_got;
2382 };
2383
2384 #define ppc64_elf_tdata(bfd) \
2385 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2386
2387 #define ppc64_tlsld_got(bfd) \
2388 (&ppc64_elf_tdata (bfd)->tlsld_got)
2389
2390 /* Override the generic function because we store some extras. */
2391
2392 static bfd_boolean
2393 ppc64_elf_mkobject (bfd *abfd)
2394 {
2395 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2396 abfd->tdata.any = bfd_zalloc (abfd, amt);
2397 if (abfd->tdata.any == NULL)
2398 return FALSE;
2399 return TRUE;
2400 }
2401
2402 /* Fix bad default arch selected for a 64 bit input bfd when the
2403 default is 32 bit. */
2404
2405 static bfd_boolean
2406 ppc64_elf_object_p (bfd *abfd)
2407 {
2408 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2409 {
2410 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2411
2412 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2413 {
2414 /* Relies on arch after 32 bit default being 64 bit default. */
2415 abfd->arch_info = abfd->arch_info->next;
2416 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2417 }
2418 }
2419 return TRUE;
2420 }
2421
2422 /* Support for core dump NOTE sections. */
2423
2424 static bfd_boolean
2425 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2426 {
2427 size_t offset, size;
2428
2429 if (note->descsz != 504)
2430 return FALSE;
2431
2432 /* pr_cursig */
2433 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2434
2435 /* pr_pid */
2436 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2437
2438 /* pr_reg */
2439 offset = 112;
2440 size = 384;
2441
2442 /* Make a ".reg/999" section. */
2443 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2444 size, note->descpos + offset);
2445 }
2446
2447 static bfd_boolean
2448 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2449 {
2450 if (note->descsz != 136)
2451 return FALSE;
2452
2453 elf_tdata (abfd)->core_program
2454 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2455 elf_tdata (abfd)->core_command
2456 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2457
2458 return TRUE;
2459 }
2460
2461 /* Merge backend specific data from an object file to the output
2462 object file when linking. */
2463
2464 static bfd_boolean
2465 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2466 {
2467 /* Check if we have the same endianess. */
2468 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2469 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2470 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2471 {
2472 const char *msg;
2473
2474 if (bfd_big_endian (ibfd))
2475 msg = _("%B: compiled for a big endian system "
2476 "and target is little endian");
2477 else
2478 msg = _("%B: compiled for a little endian system "
2479 "and target is big endian");
2480
2481 (*_bfd_error_handler) (msg, ibfd);
2482
2483 bfd_set_error (bfd_error_wrong_format);
2484 return FALSE;
2485 }
2486
2487 return TRUE;
2488 }
2489
2490 /* Add extra PPC sections. */
2491
2492 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2493 {
2494 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2495 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2496 { ".plt", 4, 0, SHT_NOBITS, 0 },
2497 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2498 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2499 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2500 { NULL, 0, 0, 0, 0 }
2501 };
2502
2503 struct _ppc64_elf_section_data
2504 {
2505 struct bfd_elf_section_data elf;
2506
2507 /* An array with one entry for each opd function descriptor. */
2508 union
2509 {
2510 /* Points to the function code section for local opd entries. */
2511 asection **func_sec;
2512 /* After editing .opd, adjust references to opd local syms. */
2513 long *adjust;
2514 } opd;
2515
2516 /* An array for toc sections, indexed by offset/8.
2517 Specifies the relocation symbol index used at a given toc offset. */
2518 unsigned *t_symndx;
2519 };
2520
2521 #define ppc64_elf_section_data(sec) \
2522 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2523
2524 static bfd_boolean
2525 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2526 {
2527 struct _ppc64_elf_section_data *sdata;
2528 bfd_size_type amt = sizeof (*sdata);
2529
2530 sdata = bfd_zalloc (abfd, amt);
2531 if (sdata == NULL)
2532 return FALSE;
2533 sec->used_by_bfd = sdata;
2534
2535 return _bfd_elf_new_section_hook (abfd, sec);
2536 }
2537
2538 static void *
2539 get_opd_info (asection * sec)
2540 {
2541 if (sec != NULL
2542 && ppc64_elf_section_data (sec) != NULL
2543 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2544 return ppc64_elf_section_data (sec)->opd.adjust;
2545 return NULL;
2546 }
2547 \f
2548 /* Parameters for the qsort hook. */
2549 static asection *synthetic_opd;
2550 static bfd_boolean synthetic_relocatable;
2551
2552 /* Helper routine for ppc64_elf_get_synthetic_symtab. */
2553
2554 static int
2555 compare_symbols (const void *ap, const void *bp)
2556 {
2557 const asymbol *a = * (const asymbol **) ap;
2558 const asymbol *b = * (const asymbol **) bp;
2559
2560 if ((a->flags & BSF_SECTION_SYM) == 0 && (b->flags & BSF_SECTION_SYM))
2561 return -1;
2562 if ((a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM) == 0)
2563 return 1;
2564
2565 if (a->section == synthetic_opd && b->section != synthetic_opd)
2566 return -1;
2567 if (a->section != synthetic_opd && b->section == synthetic_opd)
2568 return 1;
2569
2570 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2571 == (SEC_CODE | SEC_ALLOC)
2572 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2573 != (SEC_CODE | SEC_ALLOC))
2574 return -1;
2575
2576 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2577 != (SEC_CODE | SEC_ALLOC)
2578 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2579 == (SEC_CODE | SEC_ALLOC))
2580 return 1;
2581
2582 if (synthetic_relocatable)
2583 {
2584 if (a->section->id < b->section->id)
2585 return -1;
2586
2587 if (a->section->id > b->section->id)
2588 return 1;
2589 }
2590
2591 if (a->value + a->section->vma < b->value + b->section->vma)
2592 return -1;
2593
2594 if (a->value + a->section->vma > b->value + b->section->vma)
2595 return 1;
2596
2597 return 0;
2598 }
2599
2600 /* Helper routine for ppc64_elf_get_synthetic_symtab. */
2601
2602 static int
2603 compare_relocs (const void *ap, const void *bp)
2604 {
2605 const arelent *a = * (const arelent **) ap;
2606 const arelent *b = * (const arelent **) bp;
2607
2608 if (a->address < b->address)
2609 return -1;
2610
2611 if (a->address > b->address)
2612 return 1;
2613
2614 return 0;
2615 }
2616
2617 /* Create synthetic symbols. */
2618
2619 static long
2620 ppc64_elf_get_synthetic_symtab (bfd *abfd, asymbol **relsyms, asymbol **ret)
2621 {
2622 asymbol *s;
2623 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2624 arelent **relocs, **r;
2625 long count, i;
2626 size_t size;
2627 char *names;
2628 asymbol **syms = NULL;
2629 long symcount = 0, opdsymcount, relcount;
2630 asection *relopd, *opd;
2631 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2632
2633 *ret = NULL;
2634
2635 opd = bfd_get_section_by_name (abfd, ".opd");
2636 if (opd == NULL)
2637 return 0;
2638
2639 if ((bfd_get_file_flags (abfd) & HAS_SYMS))
2640 {
2641 long storage;
2642 storage = bfd_get_symtab_upper_bound (abfd);
2643 if (storage < 0)
2644 return 0;
2645
2646 if (storage)
2647 {
2648 syms = bfd_malloc (storage);
2649 if (syms == NULL)
2650 return 0;
2651 }
2652
2653 symcount = bfd_canonicalize_symtab (abfd, syms);
2654 if (symcount < 0)
2655 {
2656 free (syms);
2657 return 0;
2658 }
2659
2660 if (symcount == 0)
2661 {
2662 free (syms);
2663 syms = NULL;
2664 }
2665 }
2666
2667 if (symcount == 0)
2668 {
2669 long storage;
2670
2671 storage = bfd_get_dynamic_symtab_upper_bound (abfd);
2672 if (storage < 0)
2673 return 0;
2674
2675 if (storage)
2676 {
2677 syms = bfd_malloc (storage);
2678 if (syms == NULL)
2679 return 0;
2680 }
2681
2682 symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
2683 if (symcount < 0)
2684 {
2685 free (syms);
2686 return 0;
2687 }
2688 }
2689
2690 synthetic_opd = opd;
2691 synthetic_relocatable = relocatable;
2692 qsort (syms, symcount, sizeof (asymbol *), compare_symbols);
2693
2694 opdsymcount = symcount;
2695 for (i = 0; i < symcount; ++i)
2696 {
2697 if (syms[i]->flags & BSF_SECTION_SYM)
2698 {
2699 if (opdsymcount == symcount)
2700 opdsymcount = i;
2701 symcount = i;
2702 break;
2703 }
2704
2705 if (syms[i]->section == opd)
2706 continue;
2707
2708 if (opdsymcount == symcount)
2709 opdsymcount = i;
2710
2711 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2712 != (SEC_CODE | SEC_ALLOC))
2713 {
2714 symcount = i;
2715 break;
2716 }
2717 }
2718
2719 if (opdsymcount == 0)
2720 {
2721 free (syms);
2722 return 0;
2723 }
2724
2725 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2726 if (! relocatable)
2727 {
2728 relopd = bfd_get_section_by_name (abfd, ".rela.opd");
2729 if (relopd == NULL)
2730 {
2731 relopd = bfd_get_section_by_name (abfd, ".rela.dyn");
2732 if (relopd == NULL)
2733 {
2734 free (syms);
2735 return 0;
2736 }
2737 }
2738 relcount = relopd->size / 24;
2739
2740 if (! relcount
2741 || ! (*slurp_relocs) (abfd, relopd, relsyms, TRUE))
2742 {
2743 free (syms);
2744 return 0;
2745 }
2746 }
2747 else
2748 {
2749 relopd = opd;
2750 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2751
2752 if (! relcount
2753 || ! (*slurp_relocs) (abfd, relopd, relsyms, FALSE))
2754 {
2755 free (syms);
2756 return 0;
2757 }
2758 }
2759
2760 relocs = bfd_malloc (relcount * sizeof (arelent **));
2761 if (relocs == NULL)
2762 {
2763 free (syms);
2764 return 0;
2765 }
2766
2767 for (i = 0; i < relcount; ++i)
2768 relocs[i] = &relopd->relocation[i];
2769
2770 qsort (relocs, relcount, sizeof (*relocs), compare_relocs);
2771
2772 size = 0;
2773 count = 0;
2774 for (i = 0, r = relocs; i < opdsymcount; ++i)
2775 {
2776 long lo, hi, mid;
2777 asymbol *sym;
2778
2779 while (r < relocs + relcount
2780 && (*r)->address < syms[i]->value + opd->vma)
2781 ++r;
2782
2783 if (r == relocs + relcount)
2784 continue;
2785
2786 if ((*r)->address != syms[i]->value + opd->vma)
2787 continue;
2788
2789 if ((*r)->howto->type != (relocatable
2790 ? R_PPC64_ADDR64 : R_PPC64_RELATIVE))
2791 continue;
2792
2793 lo = opdsymcount;
2794 hi = symcount;
2795 sym = *((*r)->sym_ptr_ptr);
2796 if (relocatable)
2797 while (lo < hi)
2798 {
2799 mid = (lo + hi) >> 1;
2800 if (syms[mid]->section->id < sym->section->id)
2801 lo = mid + 1;
2802 else if (syms[mid]->section->id > sym->section->id)
2803 hi = mid;
2804 else if (syms[mid]->value < sym->value + (*r)->addend)
2805 lo = mid + 1;
2806 else if (syms[mid]->value > sym->value + (*r)->addend)
2807 hi = mid;
2808 else
2809 break;
2810 }
2811 else
2812 while (lo < hi)
2813 {
2814 mid = (lo + hi) >> 1;
2815 if (syms[mid]->value + syms[mid]->section->vma < (*r)->addend)
2816 lo = mid + 1;
2817 else if (syms[mid]->value + syms[mid]->section->vma > (*r)->addend)
2818 hi = mid;
2819 else
2820 break;
2821 }
2822
2823 if (lo >= hi)
2824 {
2825 ++count;
2826 size += sizeof (asymbol);
2827 size += strlen (syms[i]->name) + 1;
2828 }
2829 }
2830
2831 s = *ret = bfd_malloc (size);
2832 if (s == NULL)
2833 {
2834 free (syms);
2835 free (relocs);
2836 return 0;
2837 }
2838
2839 names = (char *) (s + count);
2840
2841 for (i = 0, r = relocs; i < opdsymcount; ++i)
2842 {
2843 long lo, hi, mid;
2844 asymbol *sym;
2845
2846 while (r < relocs + relcount
2847 && (*r)->address < syms[i]->value + opd->vma)
2848 ++r;
2849
2850 if (r == relocs + relcount)
2851 continue;
2852
2853 if ((*r)->address != syms[i]->value + opd->vma)
2854 continue;
2855
2856 if ((*r)->howto->type != (relocatable
2857 ? R_PPC64_ADDR64 : R_PPC64_RELATIVE))
2858 continue;
2859
2860 lo = opdsymcount;
2861 hi = symcount;
2862 sym = *((*r)->sym_ptr_ptr);
2863 if (relocatable)
2864 while (lo < hi)
2865 {
2866 mid = (lo + hi) >> 1;
2867 if (syms[mid]->section->id < sym->section->id)
2868 lo = mid + 1;
2869 else if (syms[mid]->section->id > sym->section->id)
2870 hi = mid;
2871 else if (syms[mid]->value < sym->value + (*r)->addend)
2872 lo = mid + 1;
2873 else if (syms[mid]->value > sym->value + (*r)->addend)
2874 hi = mid;
2875 else
2876 break;
2877 }
2878 else
2879 while (lo < hi)
2880 {
2881 mid = (lo + hi) >> 1;
2882 if (syms[mid]->value + syms[mid]->section->vma < (*r)->addend)
2883 lo = mid + 1;
2884 else if (syms[mid]->value + syms[mid]->section->vma > (*r)->addend)
2885 hi = mid;
2886 else
2887 break;
2888 }
2889
2890 if (lo >= hi)
2891 {
2892 size_t len;
2893
2894 *s = *syms[i];
2895
2896 if (! relocatable)
2897 {
2898 asection *sec;
2899
2900 s->section = &bfd_abs_section;
2901 for (sec = abfd->sections; sec; sec = sec->next)
2902 if ((sec->flags & (SEC_ALLOC | SEC_CODE))
2903 == (SEC_ALLOC | SEC_CODE)
2904 && (*r)->addend >= sec->vma
2905 && (*r)->addend < sec->vma + sec->size)
2906 {
2907 s->section = sec;
2908 break;
2909 }
2910 s->value = (*r)->addend - sec->vma;
2911 }
2912 else
2913 {
2914 s->section = sym->section;
2915 s->value = sym->value + (*r)->addend;
2916 }
2917 s->name = names;
2918 len = strlen (syms[i]->name);
2919 memcpy (names, syms[i]->name, len + 1);
2920 names += len + 1;
2921 s++;
2922 }
2923 }
2924
2925 free (syms);
2926 free (relocs);
2927 return count;
2928 }
2929
2930 \f
2931 /* The following functions are specific to the ELF linker, while
2932 functions above are used generally. Those named ppc64_elf_* are
2933 called by the main ELF linker code. They appear in this file more
2934 or less in the order in which they are called. eg.
2935 ppc64_elf_check_relocs is called early in the link process,
2936 ppc64_elf_finish_dynamic_sections is one of the last functions
2937 called.
2938
2939 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2940 functions have both a function code symbol and a function descriptor
2941 symbol. A call to foo in a relocatable object file looks like:
2942
2943 . .text
2944 . x:
2945 . bl .foo
2946 . nop
2947
2948 The function definition in another object file might be:
2949
2950 . .section .opd
2951 . foo: .quad .foo
2952 . .quad .TOC.@tocbase
2953 . .quad 0
2954 .
2955 . .text
2956 . .foo: blr
2957
2958 When the linker resolves the call during a static link, the branch
2959 unsurprisingly just goes to .foo and the .opd information is unused.
2960 If the function definition is in a shared library, things are a little
2961 different: The call goes via a plt call stub, the opd information gets
2962 copied to the plt, and the linker patches the nop.
2963
2964 . x:
2965 . bl .foo_stub
2966 . ld 2,40(1)
2967 .
2968 .
2969 . .foo_stub:
2970 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2971 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2972 . std 2,40(1) # this is the general idea
2973 . ld 11,0(12)
2974 . ld 2,8(12)
2975 . mtctr 11
2976 . ld 11,16(12)
2977 . bctr
2978 .
2979 . .section .plt
2980 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2981
2982 The "reloc ()" notation is supposed to indicate that the linker emits
2983 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2984 copying.
2985
2986 What are the difficulties here? Well, firstly, the relocations
2987 examined by the linker in check_relocs are against the function code
2988 sym .foo, while the dynamic relocation in the plt is emitted against
2989 the function descriptor symbol, foo. Somewhere along the line, we need
2990 to carefully copy dynamic link information from one symbol to the other.
2991 Secondly, the generic part of the elf linker will make .foo a dynamic
2992 symbol as is normal for most other backends. We need foo dynamic
2993 instead, at least for an application final link. However, when
2994 creating a shared library containing foo, we need to have both symbols
2995 dynamic so that references to .foo are satisfied during the early
2996 stages of linking. Otherwise the linker might decide to pull in a
2997 definition from some other object, eg. a static library.
2998
2999 Update: As of August 2004, we support a new convention. Function
3000 calls may use the function descriptor symbol, ie. "bl foo". This
3001 behaves exactly as "bl .foo". */
3002
3003 /* The linker needs to keep track of the number of relocs that it
3004 decides to copy as dynamic relocs in check_relocs for each symbol.
3005 This is so that it can later discard them if they are found to be
3006 unnecessary. We store the information in a field extending the
3007 regular ELF linker hash table. */
3008
3009 struct ppc_dyn_relocs
3010 {
3011 struct ppc_dyn_relocs *next;
3012
3013 /* The input section of the reloc. */
3014 asection *sec;
3015
3016 /* Total number of relocs copied for the input section. */
3017 bfd_size_type count;
3018
3019 /* Number of pc-relative relocs copied for the input section. */
3020 bfd_size_type pc_count;
3021 };
3022
3023 /* Track GOT entries needed for a given symbol. We might need more
3024 than one got entry per symbol. */
3025 struct got_entry
3026 {
3027 struct got_entry *next;
3028
3029 /* The symbol addend that we'll be placing in the GOT. */
3030 bfd_vma addend;
3031
3032 /* Unlike other ELF targets, we use separate GOT entries for the same
3033 symbol referenced from different input files. This is to support
3034 automatic multiple TOC/GOT sections, where the TOC base can vary
3035 from one input file to another.
3036
3037 Point to the BFD owning this GOT entry. */
3038 bfd *owner;
3039
3040 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3041 TLS_TPREL or TLS_DTPREL for tls entries. */
3042 char tls_type;
3043
3044 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3045 union
3046 {
3047 bfd_signed_vma refcount;
3048 bfd_vma offset;
3049 } got;
3050 };
3051
3052 /* The same for PLT. */
3053 struct plt_entry
3054 {
3055 struct plt_entry *next;
3056
3057 bfd_vma addend;
3058
3059 union
3060 {
3061 bfd_signed_vma refcount;
3062 bfd_vma offset;
3063 } plt;
3064 };
3065
3066 /* Of those relocs that might be copied as dynamic relocs, this macro
3067 selects those that must be copied when linking a shared library,
3068 even when the symbol is local. */
3069
3070 #define MUST_BE_DYN_RELOC(RTYPE) \
3071 ((RTYPE) != R_PPC64_REL32 \
3072 && (RTYPE) != R_PPC64_REL64 \
3073 && (RTYPE) != R_PPC64_REL30)
3074
3075 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3076 copying dynamic variables from a shared lib into an app's dynbss
3077 section, and instead use a dynamic relocation to point into the
3078 shared lib. With code that gcc generates, it's vital that this be
3079 enabled; In the PowerPC64 ABI, the address of a function is actually
3080 the address of a function descriptor, which resides in the .opd
3081 section. gcc uses the descriptor directly rather than going via the
3082 GOT as some other ABI's do, which means that initialized function
3083 pointers must reference the descriptor. Thus, a function pointer
3084 initialized to the address of a function in a shared library will
3085 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3086 redefines the function descriptor symbol to point to the copy. This
3087 presents a problem as a plt entry for that function is also
3088 initialized from the function descriptor symbol and the copy reloc
3089 may not be initialized first. */
3090 #define ELIMINATE_COPY_RELOCS 1
3091
3092 /* Section name for stubs is the associated section name plus this
3093 string. */
3094 #define STUB_SUFFIX ".stub"
3095
3096 /* Linker stubs.
3097 ppc_stub_long_branch:
3098 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3099 destination, but a 24 bit branch in a stub section will reach.
3100 . b dest
3101
3102 ppc_stub_plt_branch:
3103 Similar to the above, but a 24 bit branch in the stub section won't
3104 reach its destination.
3105 . addis %r12,%r2,xxx@toc@ha
3106 . ld %r11,xxx@toc@l(%r12)
3107 . mtctr %r11
3108 . bctr
3109
3110 ppc_stub_plt_call:
3111 Used to call a function in a shared library. If it so happens that
3112 the plt entry referenced crosses a 64k boundary, then an extra
3113 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3114 xxx+16 as appropriate.
3115 . addis %r12,%r2,xxx@toc@ha
3116 . std %r2,40(%r1)
3117 . ld %r11,xxx+0@toc@l(%r12)
3118 . ld %r2,xxx+8@toc@l(%r12)
3119 . mtctr %r11
3120 . ld %r11,xxx+16@toc@l(%r12)
3121 . bctr
3122
3123 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3124 code to adjust the value and save r2 to support multiple toc sections.
3125 A ppc_stub_long_branch with an r2 offset looks like:
3126 . std %r2,40(%r1)
3127 . addis %r2,%r2,off@ha
3128 . addi %r2,%r2,off@l
3129 . b dest
3130
3131 A ppc_stub_plt_branch with an r2 offset looks like:
3132 . std %r2,40(%r1)
3133 . addis %r12,%r2,xxx@toc@ha
3134 . ld %r11,xxx@toc@l(%r12)
3135 . addis %r2,%r2,off@ha
3136 . addi %r2,%r2,off@l
3137 . mtctr %r11
3138 . bctr
3139 */
3140
3141 enum ppc_stub_type {
3142 ppc_stub_none,
3143 ppc_stub_long_branch,
3144 ppc_stub_long_branch_r2off,
3145 ppc_stub_plt_branch,
3146 ppc_stub_plt_branch_r2off,
3147 ppc_stub_plt_call
3148 };
3149
3150 struct ppc_stub_hash_entry {
3151
3152 /* Base hash table entry structure. */
3153 struct bfd_hash_entry root;
3154
3155 enum ppc_stub_type stub_type;
3156
3157 /* The stub section. */
3158 asection *stub_sec;
3159
3160 /* Offset within stub_sec of the beginning of this stub. */
3161 bfd_vma stub_offset;
3162
3163 /* Given the symbol's value and its section we can determine its final
3164 value when building the stubs (so the stub knows where to jump. */
3165 bfd_vma target_value;
3166 asection *target_section;
3167
3168 /* The symbol table entry, if any, that this was derived from. */
3169 struct ppc_link_hash_entry *h;
3170
3171 /* And the reloc addend that this was derived from. */
3172 bfd_vma addend;
3173
3174 /* Where this stub is being called from, or, in the case of combined
3175 stub sections, the first input section in the group. */
3176 asection *id_sec;
3177 };
3178
3179 struct ppc_branch_hash_entry {
3180
3181 /* Base hash table entry structure. */
3182 struct bfd_hash_entry root;
3183
3184 /* Offset within .branch_lt. */
3185 unsigned int offset;
3186
3187 /* Generation marker. */
3188 unsigned int iter;
3189 };
3190
3191 struct ppc_link_hash_entry
3192 {
3193 struct elf_link_hash_entry elf;
3194
3195 /* A pointer to the most recently used stub hash entry against this
3196 symbol. */
3197 struct ppc_stub_hash_entry *stub_cache;
3198
3199 /* Track dynamic relocs copied for this symbol. */
3200 struct ppc_dyn_relocs *dyn_relocs;
3201
3202 /* Link between function code and descriptor symbols. */
3203 struct ppc_link_hash_entry *oh;
3204
3205 /* Flag function code and descriptor symbols. */
3206 unsigned int is_func:1;
3207 unsigned int is_func_descriptor:1;
3208
3209 /* Whether global opd sym has been adjusted or not.
3210 After ppc64_elf_edit_opd has run, this flag should be set for all
3211 globals defined in any opd section. */
3212 unsigned int adjust_done:1;
3213
3214 /* Set if we twiddled this symbol to weak at some stage. */
3215 unsigned int was_undefined:1;
3216
3217 /* Contexts in which symbol is used in the GOT (or TOC).
3218 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3219 corresponding relocs are encountered during check_relocs.
3220 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3221 indicate the corresponding GOT entry type is not needed.
3222 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3223 a TPREL one. We use a separate flag rather than setting TPREL
3224 just for convenience in distinguishing the two cases. */
3225 #define TLS_GD 1 /* GD reloc. */
3226 #define TLS_LD 2 /* LD reloc. */
3227 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3228 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3229 #define TLS_TLS 16 /* Any TLS reloc. */
3230 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3231 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3232 char tls_mask;
3233 };
3234
3235 /* ppc64 ELF linker hash table. */
3236
3237 struct ppc_link_hash_table
3238 {
3239 struct elf_link_hash_table elf;
3240
3241 /* The stub hash table. */
3242 struct bfd_hash_table stub_hash_table;
3243
3244 /* Another hash table for plt_branch stubs. */
3245 struct bfd_hash_table branch_hash_table;
3246
3247 /* Linker stub bfd. */
3248 bfd *stub_bfd;
3249
3250 /* Linker call-backs. */
3251 asection * (*add_stub_section) (const char *, asection *);
3252 void (*layout_sections_again) (void);
3253
3254 /* Array to keep track of which stub sections have been created, and
3255 information on stub grouping. */
3256 struct map_stub {
3257 /* This is the section to which stubs in the group will be attached. */
3258 asection *link_sec;
3259 /* The stub section. */
3260 asection *stub_sec;
3261 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3262 bfd_vma toc_off;
3263 } *stub_group;
3264
3265 /* Temp used when calculating TOC pointers. */
3266 bfd_vma toc_curr;
3267
3268 /* Highest input section id. */
3269 int top_id;
3270
3271 /* Highest output section index. */
3272 int top_index;
3273
3274 /* List of input sections for each output section. */
3275 asection **input_list;
3276
3277 /* Short-cuts to get to dynamic linker sections. */
3278 asection *got;
3279 asection *plt;
3280 asection *relplt;
3281 asection *dynbss;
3282 asection *relbss;
3283 asection *glink;
3284 asection *sfpr;
3285 asection *brlt;
3286 asection *relbrlt;
3287
3288 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3289 struct ppc_link_hash_entry *tls_get_addr;
3290 struct ppc_link_hash_entry *tls_get_addr_fd;
3291
3292 /* Statistics. */
3293 unsigned long stub_count[ppc_stub_plt_call];
3294
3295 /* Set if we should emit symbols for stubs. */
3296 unsigned int emit_stub_syms:1;
3297
3298 /* Set on error. */
3299 unsigned int stub_error:1;
3300
3301 /* Flag set when small branches are detected. Used to
3302 select suitable defaults for the stub group size. */
3303 unsigned int has_14bit_branch:1;
3304
3305 /* Temp used by ppc64_elf_check_directives. */
3306 unsigned int twiddled_syms:1;
3307
3308 /* Incremented every time we size stubs. */
3309 unsigned int stub_iteration;
3310
3311 /* Small local sym to section mapping cache. */
3312 struct sym_sec_cache sym_sec;
3313 };
3314
3315 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3316
3317 #define ppc_hash_table(p) \
3318 ((struct ppc_link_hash_table *) ((p)->hash))
3319
3320 #define ppc_stub_hash_lookup(table, string, create, copy) \
3321 ((struct ppc_stub_hash_entry *) \
3322 bfd_hash_lookup ((table), (string), (create), (copy)))
3323
3324 #define ppc_branch_hash_lookup(table, string, create, copy) \
3325 ((struct ppc_branch_hash_entry *) \
3326 bfd_hash_lookup ((table), (string), (create), (copy)))
3327
3328 /* Create an entry in the stub hash table. */
3329
3330 static struct bfd_hash_entry *
3331 stub_hash_newfunc (struct bfd_hash_entry *entry,
3332 struct bfd_hash_table *table,
3333 const char *string)
3334 {
3335 /* Allocate the structure if it has not already been allocated by a
3336 subclass. */
3337 if (entry == NULL)
3338 {
3339 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3340 if (entry == NULL)
3341 return entry;
3342 }
3343
3344 /* Call the allocation method of the superclass. */
3345 entry = bfd_hash_newfunc (entry, table, string);
3346 if (entry != NULL)
3347 {
3348 struct ppc_stub_hash_entry *eh;
3349
3350 /* Initialize the local fields. */
3351 eh = (struct ppc_stub_hash_entry *) entry;
3352 eh->stub_type = ppc_stub_none;
3353 eh->stub_sec = NULL;
3354 eh->stub_offset = 0;
3355 eh->target_value = 0;
3356 eh->target_section = NULL;
3357 eh->h = NULL;
3358 eh->id_sec = NULL;
3359 }
3360
3361 return entry;
3362 }
3363
3364 /* Create an entry in the branch hash table. */
3365
3366 static struct bfd_hash_entry *
3367 branch_hash_newfunc (struct bfd_hash_entry *entry,
3368 struct bfd_hash_table *table,
3369 const char *string)
3370 {
3371 /* Allocate the structure if it has not already been allocated by a
3372 subclass. */
3373 if (entry == NULL)
3374 {
3375 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3376 if (entry == NULL)
3377 return entry;
3378 }
3379
3380 /* Call the allocation method of the superclass. */
3381 entry = bfd_hash_newfunc (entry, table, string);
3382 if (entry != NULL)
3383 {
3384 struct ppc_branch_hash_entry *eh;
3385
3386 /* Initialize the local fields. */
3387 eh = (struct ppc_branch_hash_entry *) entry;
3388 eh->offset = 0;
3389 eh->iter = 0;
3390 }
3391
3392 return entry;
3393 }
3394
3395 /* Create an entry in a ppc64 ELF linker hash table. */
3396
3397 static struct bfd_hash_entry *
3398 link_hash_newfunc (struct bfd_hash_entry *entry,
3399 struct bfd_hash_table *table,
3400 const char *string)
3401 {
3402 /* Allocate the structure if it has not already been allocated by a
3403 subclass. */
3404 if (entry == NULL)
3405 {
3406 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3407 if (entry == NULL)
3408 return entry;
3409 }
3410
3411 /* Call the allocation method of the superclass. */
3412 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3413 if (entry != NULL)
3414 {
3415 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3416
3417 eh->stub_cache = NULL;
3418 eh->dyn_relocs = NULL;
3419 eh->oh = NULL;
3420 eh->is_func = 0;
3421 eh->is_func_descriptor = 0;
3422 eh->adjust_done = 0;
3423 eh->was_undefined = 0;
3424 eh->tls_mask = 0;
3425 }
3426
3427 return entry;
3428 }
3429
3430 /* Create a ppc64 ELF linker hash table. */
3431
3432 static struct bfd_link_hash_table *
3433 ppc64_elf_link_hash_table_create (bfd *abfd)
3434 {
3435 struct ppc_link_hash_table *htab;
3436 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3437
3438 htab = bfd_zmalloc (amt);
3439 if (htab == NULL)
3440 return NULL;
3441
3442 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3443 {
3444 free (htab);
3445 return NULL;
3446 }
3447
3448 /* Init the stub hash table too. */
3449 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3450 return NULL;
3451
3452 /* And the branch hash table. */
3453 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3454 return NULL;
3455
3456 /* Initializing two fields of the union is just cosmetic. We really
3457 only care about glist, but when compiled on a 32-bit host the
3458 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3459 debugger inspection of these fields look nicer. */
3460 htab->elf.init_refcount.refcount = 0;
3461 htab->elf.init_refcount.glist = NULL;
3462 htab->elf.init_offset.offset = 0;
3463 htab->elf.init_offset.glist = NULL;
3464
3465 return &htab->elf.root;
3466 }
3467
3468 /* Free the derived linker hash table. */
3469
3470 static void
3471 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3472 {
3473 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3474
3475 bfd_hash_table_free (&ret->stub_hash_table);
3476 bfd_hash_table_free (&ret->branch_hash_table);
3477 _bfd_generic_link_hash_table_free (hash);
3478 }
3479
3480 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3481
3482 void
3483 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3484 {
3485 struct ppc_link_hash_table *htab;
3486
3487 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3488
3489 /* Always hook our dynamic sections into the first bfd, which is the
3490 linker created stub bfd. This ensures that the GOT header is at
3491 the start of the output TOC section. */
3492 htab = ppc_hash_table (info);
3493 htab->stub_bfd = abfd;
3494 htab->elf.dynobj = abfd;
3495 }
3496
3497 /* Build a name for an entry in the stub hash table. */
3498
3499 static char *
3500 ppc_stub_name (const asection *input_section,
3501 const asection *sym_sec,
3502 const struct ppc_link_hash_entry *h,
3503 const Elf_Internal_Rela *rel)
3504 {
3505 char *stub_name;
3506 bfd_size_type len;
3507
3508 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3509 offsets from a sym as a branch target? In fact, we could
3510 probably assume the addend is always zero. */
3511 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3512
3513 if (h)
3514 {
3515 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3516 stub_name = bfd_malloc (len);
3517 if (stub_name != NULL)
3518 {
3519 sprintf (stub_name, "%08x.%s+%x",
3520 input_section->id & 0xffffffff,
3521 h->elf.root.root.string,
3522 (int) rel->r_addend & 0xffffffff);
3523 }
3524 }
3525 else
3526 {
3527 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3528 stub_name = bfd_malloc (len);
3529 if (stub_name != NULL)
3530 {
3531 sprintf (stub_name, "%08x.%x:%x+%x",
3532 input_section->id & 0xffffffff,
3533 sym_sec->id & 0xffffffff,
3534 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3535 (int) rel->r_addend & 0xffffffff);
3536 }
3537 }
3538 return stub_name;
3539 }
3540
3541 /* Look up an entry in the stub hash. Stub entries are cached because
3542 creating the stub name takes a bit of time. */
3543
3544 static struct ppc_stub_hash_entry *
3545 ppc_get_stub_entry (const asection *input_section,
3546 const asection *sym_sec,
3547 struct ppc_link_hash_entry *h,
3548 const Elf_Internal_Rela *rel,
3549 struct ppc_link_hash_table *htab)
3550 {
3551 struct ppc_stub_hash_entry *stub_entry;
3552 const asection *id_sec;
3553
3554 /* If this input section is part of a group of sections sharing one
3555 stub section, then use the id of the first section in the group.
3556 Stub names need to include a section id, as there may well be
3557 more than one stub used to reach say, printf, and we need to
3558 distinguish between them. */
3559 id_sec = htab->stub_group[input_section->id].link_sec;
3560
3561 if (h != NULL && h->stub_cache != NULL
3562 && h->stub_cache->h == h
3563 && h->stub_cache->id_sec == id_sec)
3564 {
3565 stub_entry = h->stub_cache;
3566 }
3567 else
3568 {
3569 char *stub_name;
3570
3571 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3572 if (stub_name == NULL)
3573 return NULL;
3574
3575 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3576 stub_name, FALSE, FALSE);
3577 if (h != NULL)
3578 h->stub_cache = stub_entry;
3579
3580 free (stub_name);
3581 }
3582
3583 return stub_entry;
3584 }
3585
3586 /* Add a new stub entry to the stub hash. Not all fields of the new
3587 stub entry are initialised. */
3588
3589 static struct ppc_stub_hash_entry *
3590 ppc_add_stub (const char *stub_name,
3591 asection *section,
3592 struct ppc_link_hash_table *htab)
3593 {
3594 asection *link_sec;
3595 asection *stub_sec;
3596 struct ppc_stub_hash_entry *stub_entry;
3597
3598 link_sec = htab->stub_group[section->id].link_sec;
3599 stub_sec = htab->stub_group[section->id].stub_sec;
3600 if (stub_sec == NULL)
3601 {
3602 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3603 if (stub_sec == NULL)
3604 {
3605 size_t namelen;
3606 bfd_size_type len;
3607 char *s_name;
3608
3609 namelen = strlen (link_sec->name);
3610 len = namelen + sizeof (STUB_SUFFIX);
3611 s_name = bfd_alloc (htab->stub_bfd, len);
3612 if (s_name == NULL)
3613 return NULL;
3614
3615 memcpy (s_name, link_sec->name, namelen);
3616 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3617 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3618 if (stub_sec == NULL)
3619 return NULL;
3620 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3621 }
3622 htab->stub_group[section->id].stub_sec = stub_sec;
3623 }
3624
3625 /* Enter this entry into the linker stub hash table. */
3626 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3627 TRUE, FALSE);
3628 if (stub_entry == NULL)
3629 {
3630 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3631 section->owner, stub_name);
3632 return NULL;
3633 }
3634
3635 stub_entry->stub_sec = stub_sec;
3636 stub_entry->stub_offset = 0;
3637 stub_entry->id_sec = link_sec;
3638 return stub_entry;
3639 }
3640
3641 /* Create sections for linker generated code. */
3642
3643 static bfd_boolean
3644 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3645 {
3646 struct ppc_link_hash_table *htab;
3647 flagword flags;
3648
3649 htab = ppc_hash_table (info);
3650
3651 /* Create .sfpr for code to save and restore fp regs. */
3652 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3653 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3654 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3655 if (htab->sfpr == NULL
3656 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3657 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3658 return FALSE;
3659
3660 /* Create .glink for lazy dynamic linking support. */
3661 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3662 if (htab->glink == NULL
3663 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3664 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3665 return FALSE;
3666
3667 /* Create .branch_lt for plt_branch stubs. */
3668 flags = (SEC_ALLOC | SEC_LOAD
3669 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3670 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3671 if (htab->brlt == NULL
3672 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3673 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3674 return FALSE;
3675
3676 if (info->shared)
3677 {
3678 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3679 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3680 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3681 if (!htab->relbrlt
3682 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3683 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3684 return FALSE;
3685 }
3686 return TRUE;
3687 }
3688
3689 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3690 not already done. */
3691
3692 static bfd_boolean
3693 create_got_section (bfd *abfd, struct bfd_link_info *info)
3694 {
3695 asection *got, *relgot;
3696 flagword flags;
3697 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3698
3699 if (!htab->got)
3700 {
3701 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3702 return FALSE;
3703
3704 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3705 if (!htab->got)
3706 abort ();
3707 }
3708
3709 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3710 | SEC_LINKER_CREATED);
3711
3712 got = bfd_make_section (abfd, ".got");
3713 if (!got
3714 || !bfd_set_section_flags (abfd, got, flags)
3715 || !bfd_set_section_alignment (abfd, got, 3))
3716 return FALSE;
3717
3718 relgot = bfd_make_section (abfd, ".rela.got");
3719 if (!relgot
3720 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3721 || ! bfd_set_section_alignment (abfd, relgot, 3))
3722 return FALSE;
3723
3724 ppc64_elf_tdata (abfd)->got = got;
3725 ppc64_elf_tdata (abfd)->relgot = relgot;
3726 return TRUE;
3727 }
3728
3729 /* Create the dynamic sections, and set up shortcuts. */
3730
3731 static bfd_boolean
3732 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3733 {
3734 struct ppc_link_hash_table *htab;
3735
3736 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3737 return FALSE;
3738
3739 htab = ppc_hash_table (info);
3740 if (!htab->got)
3741 htab->got = bfd_get_section_by_name (dynobj, ".got");
3742 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3743 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3744 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3745 if (!info->shared)
3746 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3747
3748 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3749 || (!info->shared && !htab->relbss))
3750 abort ();
3751
3752 return TRUE;
3753 }
3754
3755 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3756
3757 static void
3758 ppc64_elf_copy_indirect_symbol
3759 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3760 struct elf_link_hash_entry *dir,
3761 struct elf_link_hash_entry *ind)
3762 {
3763 struct ppc_link_hash_entry *edir, *eind;
3764 flagword mask;
3765
3766 edir = (struct ppc_link_hash_entry *) dir;
3767 eind = (struct ppc_link_hash_entry *) ind;
3768
3769 /* Copy over any dynamic relocs we may have on the indirect sym. */
3770 if (eind->dyn_relocs != NULL)
3771 {
3772 if (edir->dyn_relocs != NULL)
3773 {
3774 struct ppc_dyn_relocs **pp;
3775 struct ppc_dyn_relocs *p;
3776
3777 if (eind->elf.root.type == bfd_link_hash_indirect)
3778 abort ();
3779
3780 /* Add reloc counts against the weak sym to the strong sym
3781 list. Merge any entries against the same section. */
3782 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3783 {
3784 struct ppc_dyn_relocs *q;
3785
3786 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3787 if (q->sec == p->sec)
3788 {
3789 q->pc_count += p->pc_count;
3790 q->count += p->count;
3791 *pp = p->next;
3792 break;
3793 }
3794 if (q == NULL)
3795 pp = &p->next;
3796 }
3797 *pp = edir->dyn_relocs;
3798 }
3799
3800 edir->dyn_relocs = eind->dyn_relocs;
3801 eind->dyn_relocs = NULL;
3802 }
3803
3804 edir->is_func |= eind->is_func;
3805 edir->is_func_descriptor |= eind->is_func_descriptor;
3806 edir->tls_mask |= eind->tls_mask;
3807
3808 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3809 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3810 | ELF_LINK_HASH_NEEDS_PLT);
3811 /* If called to transfer flags for a weakdef during processing
3812 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3813 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3814 if (ELIMINATE_COPY_RELOCS
3815 && eind->elf.root.type != bfd_link_hash_indirect
3816 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3817 mask &= ~ELF_LINK_NON_GOT_REF;
3818
3819 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3820
3821 /* If we were called to copy over info for a weak sym, that's all. */
3822 if (eind->elf.root.type != bfd_link_hash_indirect)
3823 return;
3824
3825 /* Copy over got entries that we may have already seen to the
3826 symbol which just became indirect. */
3827 if (eind->elf.got.glist != NULL)
3828 {
3829 if (edir->elf.got.glist != NULL)
3830 {
3831 struct got_entry **entp;
3832 struct got_entry *ent;
3833
3834 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3835 {
3836 struct got_entry *dent;
3837
3838 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3839 if (dent->addend == ent->addend
3840 && dent->owner == ent->owner
3841 && dent->tls_type == ent->tls_type)
3842 {
3843 dent->got.refcount += ent->got.refcount;
3844 *entp = ent->next;
3845 break;
3846 }
3847 if (dent == NULL)
3848 entp = &ent->next;
3849 }
3850 *entp = edir->elf.got.glist;
3851 }
3852
3853 edir->elf.got.glist = eind->elf.got.glist;
3854 eind->elf.got.glist = NULL;
3855 }
3856
3857 /* And plt entries. */
3858 if (eind->elf.plt.plist != NULL)
3859 {
3860 if (edir->elf.plt.plist != NULL)
3861 {
3862 struct plt_entry **entp;
3863 struct plt_entry *ent;
3864
3865 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3866 {
3867 struct plt_entry *dent;
3868
3869 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3870 if (dent->addend == ent->addend)
3871 {
3872 dent->plt.refcount += ent->plt.refcount;
3873 *entp = ent->next;
3874 break;
3875 }
3876 if (dent == NULL)
3877 entp = &ent->next;
3878 }
3879 *entp = edir->elf.plt.plist;
3880 }
3881
3882 edir->elf.plt.plist = eind->elf.plt.plist;
3883 eind->elf.plt.plist = NULL;
3884 }
3885
3886 if (edir->elf.dynindx == -1)
3887 {
3888 edir->elf.dynindx = eind->elf.dynindx;
3889 edir->elf.dynstr_index = eind->elf.dynstr_index;
3890 eind->elf.dynindx = -1;
3891 eind->elf.dynstr_index = 0;
3892 }
3893 else
3894 BFD_ASSERT (eind->elf.dynindx == -1);
3895 }
3896
3897 /* Find the function descriptor hash entry from the given function code
3898 hash entry FH. Link the entries via their OH fields. */
3899
3900 static struct ppc_link_hash_entry *
3901 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3902 {
3903 struct ppc_link_hash_entry *fdh = fh->oh;
3904
3905 if (fdh == NULL)
3906 {
3907 const char *fd_name = fh->elf.root.root.string + 1;
3908
3909 fdh = (struct ppc_link_hash_entry *)
3910 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3911 if (fdh != NULL)
3912 {
3913 fdh->is_func_descriptor = 1;
3914 fdh->oh = fh;
3915 fh->is_func = 1;
3916 fh->oh = fdh;
3917 }
3918 }
3919
3920 return fdh;
3921 }
3922
3923 /* Hacks to support old ABI code.
3924 When making function calls, old ABI code references function entry
3925 points (dot symbols), while new ABI code references the function
3926 descriptor symbol. We need to make any combination of reference and
3927 definition work together, without breaking archive linking.
3928
3929 For a defined function "foo" and an undefined call to "bar":
3930 An old object defines "foo" and ".foo", references ".bar" (possibly
3931 "bar" too).
3932 A new object defines "foo" and references "bar".
3933
3934 A new object thus has no problem with its undefined symbols being
3935 satisfied by definitions in an old object. On the other hand, the
3936 old object won't have ".bar" satisfied by a new object. */
3937
3938 /* Fix function descriptor symbols defined in .opd sections to be
3939 function type. */
3940
3941 static bfd_boolean
3942 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3943 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3944 Elf_Internal_Sym *isym,
3945 const char **name ATTRIBUTE_UNUSED,
3946 flagword *flags ATTRIBUTE_UNUSED,
3947 asection **sec,
3948 bfd_vma *value ATTRIBUTE_UNUSED)
3949 {
3950 if (*sec != NULL
3951 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3952 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3953 return TRUE;
3954 }
3955
3956 /* This function makes an old ABI object reference to ".bar" cause the
3957 inclusion of a new ABI object archive that defines "bar". */
3958
3959 static struct elf_link_hash_entry *
3960 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3961 struct bfd_link_info *info,
3962 const char *name)
3963 {
3964 struct elf_link_hash_entry *h;
3965 char *dot_name;
3966 size_t len;
3967
3968 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3969 if (h != NULL)
3970 return h;
3971
3972 if (name[0] == '.')
3973 return h;
3974
3975 len = strlen (name);
3976 dot_name = bfd_alloc (abfd, len + 2);
3977 if (dot_name == NULL)
3978 return (struct elf_link_hash_entry *) 0 - 1;
3979 dot_name[0] = '.';
3980 memcpy (dot_name + 1, name, len + 1);
3981 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3982 bfd_release (abfd, dot_name);
3983 return h;
3984 }
3985
3986 /* This function satisfies all old ABI object references to ".bar" if a
3987 new ABI object defines "bar". Well, at least, undefined dot symbols
3988 are made weak. This stops later archive searches from including an
3989 object if we already have a function descriptor definition. It also
3990 prevents the linker complaining about undefined symbols.
3991 We also check and correct mismatched symbol visibility here. The
3992 most restrictive visibility of the function descriptor and the
3993 function entry symbol is used. */
3994
3995 static bfd_boolean
3996 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
3997 {
3998 struct bfd_link_info *info;
3999 struct ppc_link_hash_table *htab;
4000 struct ppc_link_hash_entry *eh;
4001 struct ppc_link_hash_entry *fdh;
4002
4003 if (h->root.type == bfd_link_hash_indirect)
4004 return TRUE;
4005
4006 if (h->root.type == bfd_link_hash_warning)
4007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4008
4009 if (h->root.root.string[0] != '.')
4010 return TRUE;
4011
4012 info = inf;
4013 htab = ppc_hash_table (info);
4014 eh = (struct ppc_link_hash_entry *) h;
4015 fdh = get_fdh (eh, htab);
4016 if (fdh != NULL)
4017 {
4018 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4019 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4020 if (entry_vis < descr_vis)
4021 fdh->elf.other += entry_vis - descr_vis;
4022 else if (entry_vis > descr_vis)
4023 eh->elf.other += descr_vis - entry_vis;
4024
4025 if (eh->elf.root.type == bfd_link_hash_undefined)
4026 {
4027 eh->elf.root.type = bfd_link_hash_undefweak;
4028 eh->was_undefined = 1;
4029 htab->twiddled_syms = 1;
4030 }
4031 }
4032
4033 return TRUE;
4034 }
4035
4036 static bfd_boolean
4037 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4038 struct bfd_link_info *info)
4039 {
4040 struct ppc_link_hash_table *htab;
4041 extern const bfd_target bfd_elf64_powerpc_vec;
4042 extern const bfd_target bfd_elf64_powerpcle_vec;
4043
4044 htab = ppc_hash_table (info);
4045 if (htab->elf.root.creator != &bfd_elf64_powerpc_vec
4046 && htab->elf.root.creator != &bfd_elf64_powerpcle_vec)
4047 return TRUE;
4048
4049 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, info);
4050
4051 /* We need to fix the undefs list for any syms we have twiddled to
4052 undef_weak. */
4053 if (htab->twiddled_syms)
4054 {
4055 struct bfd_link_hash_entry **pun;
4056
4057 pun = &htab->elf.root.undefs;
4058 while (*pun != NULL)
4059 {
4060 struct bfd_link_hash_entry *h = *pun;
4061
4062 if (h->type != bfd_link_hash_undefined
4063 && h->type != bfd_link_hash_common)
4064 {
4065 *pun = h->und_next;
4066 h->und_next = NULL;
4067 if (h == htab->elf.root.undefs_tail)
4068 {
4069 if (pun == &htab->elf.root.undefs)
4070 htab->elf.root.undefs_tail = NULL;
4071 else
4072 /* pun points at an und_next field. Go back to
4073 the start of the link_hash_entry. */
4074 htab->elf.root.undefs_tail = (struct bfd_link_hash_entry *)
4075 ((char *) pun - ((char *) &h->und_next - (char *) h));
4076 break;
4077 }
4078 }
4079 else
4080 pun = &h->und_next;
4081 }
4082
4083 htab->twiddled_syms = 0;
4084 }
4085 return TRUE;
4086 }
4087
4088 static bfd_boolean
4089 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4090 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4091 {
4092 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4093 char *local_got_tls_masks;
4094
4095 if (local_got_ents == NULL)
4096 {
4097 bfd_size_type size = symtab_hdr->sh_info;
4098
4099 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4100 local_got_ents = bfd_zalloc (abfd, size);
4101 if (local_got_ents == NULL)
4102 return FALSE;
4103 elf_local_got_ents (abfd) = local_got_ents;
4104 }
4105
4106 if ((tls_type & TLS_EXPLICIT) == 0)
4107 {
4108 struct got_entry *ent;
4109
4110 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4111 if (ent->addend == r_addend
4112 && ent->owner == abfd
4113 && ent->tls_type == tls_type)
4114 break;
4115 if (ent == NULL)
4116 {
4117 bfd_size_type amt = sizeof (*ent);
4118 ent = bfd_alloc (abfd, amt);
4119 if (ent == NULL)
4120 return FALSE;
4121 ent->next = local_got_ents[r_symndx];
4122 ent->addend = r_addend;
4123 ent->owner = abfd;
4124 ent->tls_type = tls_type;
4125 ent->got.refcount = 0;
4126 local_got_ents[r_symndx] = ent;
4127 }
4128 ent->got.refcount += 1;
4129 }
4130
4131 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4132 local_got_tls_masks[r_symndx] |= tls_type;
4133 return TRUE;
4134 }
4135
4136 static bfd_boolean
4137 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4138 {
4139 struct plt_entry *ent;
4140
4141 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4142 if (ent->addend == addend)
4143 break;
4144 if (ent == NULL)
4145 {
4146 bfd_size_type amt = sizeof (*ent);
4147 ent = bfd_alloc (abfd, amt);
4148 if (ent == NULL)
4149 return FALSE;
4150 ent->next = eh->elf.plt.plist;
4151 ent->addend = addend;
4152 ent->plt.refcount = 0;
4153 eh->elf.plt.plist = ent;
4154 }
4155 ent->plt.refcount += 1;
4156 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4157 eh->is_func = 1;
4158 return TRUE;
4159 }
4160
4161 /* Look through the relocs for a section during the first phase, and
4162 calculate needed space in the global offset table, procedure
4163 linkage table, and dynamic reloc sections. */
4164
4165 static bfd_boolean
4166 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4167 asection *sec, const Elf_Internal_Rela *relocs)
4168 {
4169 struct ppc_link_hash_table *htab;
4170 Elf_Internal_Shdr *symtab_hdr;
4171 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4172 const Elf_Internal_Rela *rel;
4173 const Elf_Internal_Rela *rel_end;
4174 asection *sreloc;
4175 asection **opd_sym_map;
4176
4177 if (info->relocatable)
4178 return TRUE;
4179
4180 /* Don't do anything special with non-loaded, non-alloced sections.
4181 In particular, any relocs in such sections should not affect GOT
4182 and PLT reference counting (ie. we don't allow them to create GOT
4183 or PLT entries), there's no possibility or desire to optimize TLS
4184 relocs, and there's not much point in propagating relocs to shared
4185 libs that the dynamic linker won't relocate. */
4186 if ((sec->flags & SEC_ALLOC) == 0)
4187 return TRUE;
4188
4189 htab = ppc_hash_table (info);
4190 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4191
4192 sym_hashes = elf_sym_hashes (abfd);
4193 sym_hashes_end = (sym_hashes
4194 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4195 - symtab_hdr->sh_info);
4196
4197 sreloc = NULL;
4198 opd_sym_map = NULL;
4199 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4200 {
4201 /* Garbage collection needs some extra help with .opd sections.
4202 We don't want to necessarily keep everything referenced by
4203 relocs in .opd, as that would keep all functions. Instead,
4204 if we reference an .opd symbol (a function descriptor), we
4205 want to keep the function code symbol's section. This is
4206 easy for global symbols, but for local syms we need to keep
4207 information about the associated function section. Later, if
4208 edit_opd deletes entries, we'll use this array to adjust
4209 local syms in .opd. */
4210 union opd_info {
4211 asection *func_section;
4212 long entry_adjust;
4213 };
4214 bfd_size_type amt;
4215
4216 amt = sec->size * sizeof (union opd_info) / 8;
4217 opd_sym_map = bfd_zalloc (abfd, amt);
4218 if (opd_sym_map == NULL)
4219 return FALSE;
4220 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4221 }
4222
4223 if (htab->sfpr == NULL
4224 && !create_linkage_sections (htab->elf.dynobj, info))
4225 return FALSE;
4226
4227 rel_end = relocs + sec->reloc_count;
4228 for (rel = relocs; rel < rel_end; rel++)
4229 {
4230 unsigned long r_symndx;
4231 struct elf_link_hash_entry *h;
4232 enum elf_ppc64_reloc_type r_type;
4233 int tls_type = 0;
4234
4235 r_symndx = ELF64_R_SYM (rel->r_info);
4236 if (r_symndx < symtab_hdr->sh_info)
4237 h = NULL;
4238 else
4239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4240
4241 r_type = ELF64_R_TYPE (rel->r_info);
4242 switch (r_type)
4243 {
4244 case R_PPC64_GOT_TLSLD16:
4245 case R_PPC64_GOT_TLSLD16_LO:
4246 case R_PPC64_GOT_TLSLD16_HI:
4247 case R_PPC64_GOT_TLSLD16_HA:
4248 ppc64_tlsld_got (abfd)->refcount += 1;
4249 tls_type = TLS_TLS | TLS_LD;
4250 goto dogottls;
4251
4252 case R_PPC64_GOT_TLSGD16:
4253 case R_PPC64_GOT_TLSGD16_LO:
4254 case R_PPC64_GOT_TLSGD16_HI:
4255 case R_PPC64_GOT_TLSGD16_HA:
4256 tls_type = TLS_TLS | TLS_GD;
4257 goto dogottls;
4258
4259 case R_PPC64_GOT_TPREL16_DS:
4260 case R_PPC64_GOT_TPREL16_LO_DS:
4261 case R_PPC64_GOT_TPREL16_HI:
4262 case R_PPC64_GOT_TPREL16_HA:
4263 if (info->shared)
4264 info->flags |= DF_STATIC_TLS;
4265 tls_type = TLS_TLS | TLS_TPREL;
4266 goto dogottls;
4267
4268 case R_PPC64_GOT_DTPREL16_DS:
4269 case R_PPC64_GOT_DTPREL16_LO_DS:
4270 case R_PPC64_GOT_DTPREL16_HI:
4271 case R_PPC64_GOT_DTPREL16_HA:
4272 tls_type = TLS_TLS | TLS_DTPREL;
4273 dogottls:
4274 sec->has_tls_reloc = 1;
4275 /* Fall thru */
4276
4277 case R_PPC64_GOT16:
4278 case R_PPC64_GOT16_DS:
4279 case R_PPC64_GOT16_HA:
4280 case R_PPC64_GOT16_HI:
4281 case R_PPC64_GOT16_LO:
4282 case R_PPC64_GOT16_LO_DS:
4283 /* This symbol requires a global offset table entry. */
4284 sec->has_gp_reloc = 1;
4285 if (ppc64_elf_tdata (abfd)->got == NULL
4286 && !create_got_section (abfd, info))
4287 return FALSE;
4288
4289 if (h != NULL)
4290 {
4291 struct ppc_link_hash_entry *eh;
4292 struct got_entry *ent;
4293
4294 eh = (struct ppc_link_hash_entry *) h;
4295 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4296 if (ent->addend == rel->r_addend
4297 && ent->owner == abfd
4298 && ent->tls_type == tls_type)
4299 break;
4300 if (ent == NULL)
4301 {
4302 bfd_size_type amt = sizeof (*ent);
4303 ent = bfd_alloc (abfd, amt);
4304 if (ent == NULL)
4305 return FALSE;
4306 ent->next = eh->elf.got.glist;
4307 ent->addend = rel->r_addend;
4308 ent->owner = abfd;
4309 ent->tls_type = tls_type;
4310 ent->got.refcount = 0;
4311 eh->elf.got.glist = ent;
4312 }
4313 ent->got.refcount += 1;
4314 eh->tls_mask |= tls_type;
4315 }
4316 else
4317 /* This is a global offset table entry for a local symbol. */
4318 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4319 rel->r_addend, tls_type))
4320 return FALSE;
4321 break;
4322
4323 case R_PPC64_PLT16_HA:
4324 case R_PPC64_PLT16_HI:
4325 case R_PPC64_PLT16_LO:
4326 case R_PPC64_PLT32:
4327 case R_PPC64_PLT64:
4328 /* This symbol requires a procedure linkage table entry. We
4329 actually build the entry in adjust_dynamic_symbol,
4330 because this might be a case of linking PIC code without
4331 linking in any dynamic objects, in which case we don't
4332 need to generate a procedure linkage table after all. */
4333 if (h == NULL)
4334 {
4335 /* It does not make sense to have a procedure linkage
4336 table entry for a local symbol. */
4337 bfd_set_error (bfd_error_bad_value);
4338 return FALSE;
4339 }
4340 else
4341 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4342 rel->r_addend))
4343 return FALSE;
4344 break;
4345
4346 /* The following relocations don't need to propagate the
4347 relocation if linking a shared object since they are
4348 section relative. */
4349 case R_PPC64_SECTOFF:
4350 case R_PPC64_SECTOFF_LO:
4351 case R_PPC64_SECTOFF_HI:
4352 case R_PPC64_SECTOFF_HA:
4353 case R_PPC64_SECTOFF_DS:
4354 case R_PPC64_SECTOFF_LO_DS:
4355 case R_PPC64_DTPREL16:
4356 case R_PPC64_DTPREL16_LO:
4357 case R_PPC64_DTPREL16_HI:
4358 case R_PPC64_DTPREL16_HA:
4359 case R_PPC64_DTPREL16_DS:
4360 case R_PPC64_DTPREL16_LO_DS:
4361 case R_PPC64_DTPREL16_HIGHER:
4362 case R_PPC64_DTPREL16_HIGHERA:
4363 case R_PPC64_DTPREL16_HIGHEST:
4364 case R_PPC64_DTPREL16_HIGHESTA:
4365 break;
4366
4367 /* Nor do these. */
4368 case R_PPC64_TOC16:
4369 case R_PPC64_TOC16_LO:
4370 case R_PPC64_TOC16_HI:
4371 case R_PPC64_TOC16_HA:
4372 case R_PPC64_TOC16_DS:
4373 case R_PPC64_TOC16_LO_DS:
4374 sec->has_gp_reloc = 1;
4375 break;
4376
4377 /* This relocation describes the C++ object vtable hierarchy.
4378 Reconstruct it for later use during GC. */
4379 case R_PPC64_GNU_VTINHERIT:
4380 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4381 return FALSE;
4382 break;
4383
4384 /* This relocation describes which C++ vtable entries are actually
4385 used. Record for later use during GC. */
4386 case R_PPC64_GNU_VTENTRY:
4387 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4388 return FALSE;
4389 break;
4390
4391 case R_PPC64_REL14:
4392 case R_PPC64_REL14_BRTAKEN:
4393 case R_PPC64_REL14_BRNTAKEN:
4394 htab->has_14bit_branch = 1;
4395 /* Fall through. */
4396
4397 case R_PPC64_REL24:
4398 if (h != NULL)
4399 {
4400 /* We may need a .plt entry if the function this reloc
4401 refers to is in a shared lib. */
4402 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4403 rel->r_addend))
4404 return FALSE;
4405 if (h == &htab->tls_get_addr->elf
4406 || h == &htab->tls_get_addr_fd->elf)
4407 sec->has_tls_reloc = 1;
4408 else if (htab->tls_get_addr == NULL
4409 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4410 && (h->root.root.string[15] == 0
4411 || h->root.root.string[15] == '@'))
4412 {
4413 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4414 sec->has_tls_reloc = 1;
4415 }
4416 else if (htab->tls_get_addr_fd == NULL
4417 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4418 && (h->root.root.string[14] == 0
4419 || h->root.root.string[14] == '@'))
4420 {
4421 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4422 sec->has_tls_reloc = 1;
4423 }
4424 }
4425 break;
4426
4427 case R_PPC64_TPREL64:
4428 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4429 if (info->shared)
4430 info->flags |= DF_STATIC_TLS;
4431 goto dotlstoc;
4432
4433 case R_PPC64_DTPMOD64:
4434 if (rel + 1 < rel_end
4435 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4436 && rel[1].r_offset == rel->r_offset + 8)
4437 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4438 else
4439 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4440 goto dotlstoc;
4441
4442 case R_PPC64_DTPREL64:
4443 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4444 if (rel != relocs
4445 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4446 && rel[-1].r_offset == rel->r_offset - 8)
4447 /* This is the second reloc of a dtpmod, dtprel pair.
4448 Don't mark with TLS_DTPREL. */
4449 goto dodyn;
4450
4451 dotlstoc:
4452 sec->has_tls_reloc = 1;
4453 if (h != NULL)
4454 {
4455 struct ppc_link_hash_entry *eh;
4456 eh = (struct ppc_link_hash_entry *) h;
4457 eh->tls_mask |= tls_type;
4458 }
4459 else
4460 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4461 rel->r_addend, tls_type))
4462 return FALSE;
4463
4464 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4465 {
4466 /* One extra to simplify get_tls_mask. */
4467 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4468 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4469 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4470 return FALSE;
4471 }
4472 BFD_ASSERT (rel->r_offset % 8 == 0);
4473 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4474
4475 /* Mark the second slot of a GD or LD entry.
4476 -1 to indicate GD and -2 to indicate LD. */
4477 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4478 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4479 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4480 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4481 goto dodyn;
4482
4483 case R_PPC64_TPREL16:
4484 case R_PPC64_TPREL16_LO:
4485 case R_PPC64_TPREL16_HI:
4486 case R_PPC64_TPREL16_HA:
4487 case R_PPC64_TPREL16_DS:
4488 case R_PPC64_TPREL16_LO_DS:
4489 case R_PPC64_TPREL16_HIGHER:
4490 case R_PPC64_TPREL16_HIGHERA:
4491 case R_PPC64_TPREL16_HIGHEST:
4492 case R_PPC64_TPREL16_HIGHESTA:
4493 if (info->shared)
4494 {
4495 info->flags |= DF_STATIC_TLS;
4496 goto dodyn;
4497 }
4498 break;
4499
4500 case R_PPC64_ADDR64:
4501 if (opd_sym_map != NULL
4502 && rel + 1 < rel_end
4503 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4504 {
4505 if (h != NULL)
4506 {
4507 if (h->root.root.string[0] == '.'
4508 && h->root.root.string[1] != 0
4509 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4510 ;
4511 else
4512 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4513 }
4514 else
4515 {
4516 asection *s;
4517
4518 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4519 r_symndx);
4520 if (s == NULL)
4521 return FALSE;
4522 else if (s != sec)
4523 opd_sym_map[rel->r_offset / 8] = s;
4524 }
4525 }
4526 /* Fall through. */
4527
4528 case R_PPC64_REL30:
4529 case R_PPC64_REL32:
4530 case R_PPC64_REL64:
4531 case R_PPC64_ADDR14:
4532 case R_PPC64_ADDR14_BRNTAKEN:
4533 case R_PPC64_ADDR14_BRTAKEN:
4534 case R_PPC64_ADDR16:
4535 case R_PPC64_ADDR16_DS:
4536 case R_PPC64_ADDR16_HA:
4537 case R_PPC64_ADDR16_HI:
4538 case R_PPC64_ADDR16_HIGHER:
4539 case R_PPC64_ADDR16_HIGHERA:
4540 case R_PPC64_ADDR16_HIGHEST:
4541 case R_PPC64_ADDR16_HIGHESTA:
4542 case R_PPC64_ADDR16_LO:
4543 case R_PPC64_ADDR16_LO_DS:
4544 case R_PPC64_ADDR24:
4545 case R_PPC64_ADDR32:
4546 case R_PPC64_UADDR16:
4547 case R_PPC64_UADDR32:
4548 case R_PPC64_UADDR64:
4549 case R_PPC64_TOC:
4550 if (h != NULL && !info->shared)
4551 /* We may need a copy reloc. */
4552 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
4553
4554 /* Don't propagate .opd relocs. */
4555 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4556 break;
4557
4558 /* If we are creating a shared library, and this is a reloc
4559 against a global symbol, or a non PC relative reloc
4560 against a local symbol, then we need to copy the reloc
4561 into the shared library. However, if we are linking with
4562 -Bsymbolic, we do not need to copy a reloc against a
4563 global symbol which is defined in an object we are
4564 including in the link (i.e., DEF_REGULAR is set). At
4565 this point we have not seen all the input files, so it is
4566 possible that DEF_REGULAR is not set now but will be set
4567 later (it is never cleared). In case of a weak definition,
4568 DEF_REGULAR may be cleared later by a strong definition in
4569 a shared library. We account for that possibility below by
4570 storing information in the dyn_relocs field of the hash
4571 table entry. A similar situation occurs when creating
4572 shared libraries and symbol visibility changes render the
4573 symbol local.
4574
4575 If on the other hand, we are creating an executable, we
4576 may need to keep relocations for symbols satisfied by a
4577 dynamic library if we manage to avoid copy relocs for the
4578 symbol. */
4579 dodyn:
4580 if ((info->shared
4581 && (MUST_BE_DYN_RELOC (r_type)
4582 || (h != NULL
4583 && (! info->symbolic
4584 || h->root.type == bfd_link_hash_defweak
4585 || (h->elf_link_hash_flags
4586 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4587 || (ELIMINATE_COPY_RELOCS
4588 && !info->shared
4589 && h != NULL
4590 && (h->root.type == bfd_link_hash_defweak
4591 || (h->elf_link_hash_flags
4592 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4593 {
4594 struct ppc_dyn_relocs *p;
4595 struct ppc_dyn_relocs **head;
4596
4597 /* We must copy these reloc types into the output file.
4598 Create a reloc section in dynobj and make room for
4599 this reloc. */
4600 if (sreloc == NULL)
4601 {
4602 const char *name;
4603 bfd *dynobj;
4604
4605 name = (bfd_elf_string_from_elf_section
4606 (abfd,
4607 elf_elfheader (abfd)->e_shstrndx,
4608 elf_section_data (sec)->rel_hdr.sh_name));
4609 if (name == NULL)
4610 return FALSE;
4611
4612 if (strncmp (name, ".rela", 5) != 0
4613 || strcmp (bfd_get_section_name (abfd, sec),
4614 name + 5) != 0)
4615 {
4616 (*_bfd_error_handler)
4617 (_("%B: bad relocation section name `%s\'"),
4618 abfd, name);
4619 bfd_set_error (bfd_error_bad_value);
4620 }
4621
4622 dynobj = htab->elf.dynobj;
4623 sreloc = bfd_get_section_by_name (dynobj, name);
4624 if (sreloc == NULL)
4625 {
4626 flagword flags;
4627
4628 sreloc = bfd_make_section (dynobj, name);
4629 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4630 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4631 if ((sec->flags & SEC_ALLOC) != 0)
4632 flags |= SEC_ALLOC | SEC_LOAD;
4633 if (sreloc == NULL
4634 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4635 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4636 return FALSE;
4637 }
4638 elf_section_data (sec)->sreloc = sreloc;
4639 }
4640
4641 /* If this is a global symbol, we count the number of
4642 relocations we need for this symbol. */
4643 if (h != NULL)
4644 {
4645 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4646 }
4647 else
4648 {
4649 /* Track dynamic relocs needed for local syms too.
4650 We really need local syms available to do this
4651 easily. Oh well. */
4652
4653 asection *s;
4654 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4655 sec, r_symndx);
4656 if (s == NULL)
4657 return FALSE;
4658
4659 head = ((struct ppc_dyn_relocs **)
4660 &elf_section_data (s)->local_dynrel);
4661 }
4662
4663 p = *head;
4664 if (p == NULL || p->sec != sec)
4665 {
4666 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4667 if (p == NULL)
4668 return FALSE;
4669 p->next = *head;
4670 *head = p;
4671 p->sec = sec;
4672 p->count = 0;
4673 p->pc_count = 0;
4674 }
4675
4676 p->count += 1;
4677 if (!MUST_BE_DYN_RELOC (r_type))
4678 p->pc_count += 1;
4679 }
4680 break;
4681
4682 default:
4683 break;
4684 }
4685 }
4686
4687 return TRUE;
4688 }
4689
4690 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4691 of the code entry point, and its section. */
4692
4693 static bfd_vma
4694 opd_entry_value (asection *opd_sec,
4695 bfd_vma offset,
4696 asection **code_sec,
4697 bfd_vma *code_off)
4698 {
4699 bfd *opd_bfd = opd_sec->owner;
4700 Elf_Internal_Rela *lo, *hi, *look;
4701
4702 /* Go find the opd reloc at the sym address. */
4703 lo = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4704 BFD_ASSERT (lo != NULL);
4705 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4706
4707 while (lo < hi)
4708 {
4709 look = lo + (hi - lo) / 2;
4710 if (look->r_offset < offset)
4711 lo = look + 1;
4712 else if (look->r_offset > offset)
4713 hi = look;
4714 else
4715 {
4716 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4717 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4718 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4719 {
4720 unsigned long symndx = ELF64_R_SYM (look->r_info);
4721 bfd_vma val;
4722 asection *sec;
4723
4724 if (symndx < symtab_hdr->sh_info)
4725 {
4726 Elf_Internal_Sym *sym;
4727
4728 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4729 if (sym == NULL)
4730 {
4731 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4732 symtab_hdr->sh_info,
4733 0, NULL, NULL, NULL);
4734 if (sym == NULL)
4735 return (bfd_vma) -1;
4736 symtab_hdr->contents = (bfd_byte *) sym;
4737 }
4738
4739 sym += symndx;
4740 val = sym->st_value;
4741 sec = NULL;
4742 if ((sym->st_shndx != SHN_UNDEF
4743 && sym->st_shndx < SHN_LORESERVE)
4744 || sym->st_shndx > SHN_HIRESERVE)
4745 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4746 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4747 }
4748 else
4749 {
4750 struct elf_link_hash_entry **sym_hashes;
4751 struct elf_link_hash_entry *rh;
4752
4753 sym_hashes = elf_sym_hashes (opd_bfd);
4754 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4755 while (rh->root.type == bfd_link_hash_indirect
4756 || rh->root.type == bfd_link_hash_warning)
4757 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4758 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4759 || rh->root.type == bfd_link_hash_defweak);
4760 val = rh->root.u.def.value;
4761 sec = rh->root.u.def.section;
4762 }
4763 val += look->r_addend;
4764 if (code_off != NULL)
4765 *code_off = val;
4766 if (code_sec != NULL)
4767 *code_sec = sec;
4768 if (sec != NULL && sec->output_section != NULL)
4769 val += sec->output_section->vma + sec->output_offset;
4770 return val;
4771 }
4772 break;
4773 }
4774 }
4775 return (bfd_vma) -1;
4776 }
4777
4778 /* Return the section that should be marked against GC for a given
4779 relocation. */
4780
4781 static asection *
4782 ppc64_elf_gc_mark_hook (asection *sec,
4783 struct bfd_link_info *info,
4784 Elf_Internal_Rela *rel,
4785 struct elf_link_hash_entry *h,
4786 Elf_Internal_Sym *sym)
4787 {
4788 asection *rsec;
4789
4790 /* First mark all our entry sym sections. */
4791 if (info->gc_sym_list != NULL)
4792 {
4793 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4794 struct bfd_sym_chain *sym = info->gc_sym_list;
4795
4796 info->gc_sym_list = NULL;
4797 do
4798 {
4799 struct ppc_link_hash_entry *eh;
4800
4801 eh = (struct ppc_link_hash_entry *)
4802 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4803 if (eh == NULL)
4804 continue;
4805 if (eh->elf.root.type != bfd_link_hash_defined
4806 && eh->elf.root.type != bfd_link_hash_defweak)
4807 continue;
4808
4809 if (eh->is_func_descriptor)
4810 rsec = eh->oh->elf.root.u.def.section;
4811 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4812 && opd_entry_value (eh->elf.root.u.def.section,
4813 eh->elf.root.u.def.value,
4814 &rsec, NULL) != (bfd_vma) -1)
4815 ;
4816 else
4817 continue;
4818
4819 if (!rsec->gc_mark)
4820 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4821
4822 rsec = eh->elf.root.u.def.section;
4823 if (!rsec->gc_mark)
4824 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4825
4826 sym = sym->next;
4827 }
4828 while (sym != NULL);
4829 }
4830
4831 /* Syms return NULL if we're marking .opd, so we avoid marking all
4832 function sections, as all functions are referenced in .opd. */
4833 rsec = NULL;
4834 if (get_opd_info (sec) != NULL)
4835 return rsec;
4836
4837 if (h != NULL)
4838 {
4839 enum elf_ppc64_reloc_type r_type;
4840 struct ppc_link_hash_entry *eh;
4841
4842 r_type = ELF64_R_TYPE (rel->r_info);
4843 switch (r_type)
4844 {
4845 case R_PPC64_GNU_VTINHERIT:
4846 case R_PPC64_GNU_VTENTRY:
4847 break;
4848
4849 default:
4850 switch (h->root.type)
4851 {
4852 case bfd_link_hash_defined:
4853 case bfd_link_hash_defweak:
4854 eh = (struct ppc_link_hash_entry *) h;
4855 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4856 eh = eh->oh;
4857
4858 /* Function descriptor syms cause the associated
4859 function code sym section to be marked. */
4860 if (eh->is_func_descriptor)
4861 {
4862 /* They also mark their opd section. */
4863 if (!eh->elf.root.u.def.section->gc_mark)
4864 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4865 ppc64_elf_gc_mark_hook);
4866
4867 rsec = eh->oh->elf.root.u.def.section;
4868 }
4869 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4870 && opd_entry_value (eh->elf.root.u.def.section,
4871 eh->elf.root.u.def.value,
4872 &rsec, NULL) != (bfd_vma) -1)
4873 {
4874 if (!eh->elf.root.u.def.section->gc_mark)
4875 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4876 ppc64_elf_gc_mark_hook);
4877 }
4878 else
4879 rsec = h->root.u.def.section;
4880 break;
4881
4882 case bfd_link_hash_common:
4883 rsec = h->root.u.c.p->section;
4884 break;
4885
4886 default:
4887 break;
4888 }
4889 }
4890 }
4891 else
4892 {
4893 asection **opd_sym_section;
4894
4895 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4896 opd_sym_section = get_opd_info (rsec);
4897 if (opd_sym_section != NULL)
4898 {
4899 if (!rsec->gc_mark)
4900 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4901
4902 rsec = opd_sym_section[sym->st_value / 8];
4903 }
4904 }
4905
4906 return rsec;
4907 }
4908
4909 /* Update the .got, .plt. and dynamic reloc reference counts for the
4910 section being removed. */
4911
4912 static bfd_boolean
4913 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4914 asection *sec, const Elf_Internal_Rela *relocs)
4915 {
4916 struct ppc_link_hash_table *htab;
4917 Elf_Internal_Shdr *symtab_hdr;
4918 struct elf_link_hash_entry **sym_hashes;
4919 struct got_entry **local_got_ents;
4920 const Elf_Internal_Rela *rel, *relend;
4921
4922 if ((sec->flags & SEC_ALLOC) == 0)
4923 return TRUE;
4924
4925 elf_section_data (sec)->local_dynrel = NULL;
4926
4927 htab = ppc_hash_table (info);
4928 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4929 sym_hashes = elf_sym_hashes (abfd);
4930 local_got_ents = elf_local_got_ents (abfd);
4931
4932 relend = relocs + sec->reloc_count;
4933 for (rel = relocs; rel < relend; rel++)
4934 {
4935 unsigned long r_symndx;
4936 enum elf_ppc64_reloc_type r_type;
4937 struct elf_link_hash_entry *h = NULL;
4938 char tls_type = 0;
4939
4940 r_symndx = ELF64_R_SYM (rel->r_info);
4941 r_type = ELF64_R_TYPE (rel->r_info);
4942 if (r_symndx >= symtab_hdr->sh_info)
4943 {
4944 struct ppc_link_hash_entry *eh;
4945 struct ppc_dyn_relocs **pp;
4946 struct ppc_dyn_relocs *p;
4947
4948 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4949 eh = (struct ppc_link_hash_entry *) h;
4950
4951 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4952 if (p->sec == sec)
4953 {
4954 /* Everything must go for SEC. */
4955 *pp = p->next;
4956 break;
4957 }
4958 }
4959
4960 switch (r_type)
4961 {
4962 case R_PPC64_GOT_TLSLD16:
4963 case R_PPC64_GOT_TLSLD16_LO:
4964 case R_PPC64_GOT_TLSLD16_HI:
4965 case R_PPC64_GOT_TLSLD16_HA:
4966 ppc64_tlsld_got (abfd)->refcount -= 1;
4967 tls_type = TLS_TLS | TLS_LD;
4968 goto dogot;
4969
4970 case R_PPC64_GOT_TLSGD16:
4971 case R_PPC64_GOT_TLSGD16_LO:
4972 case R_PPC64_GOT_TLSGD16_HI:
4973 case R_PPC64_GOT_TLSGD16_HA:
4974 tls_type = TLS_TLS | TLS_GD;
4975 goto dogot;
4976
4977 case R_PPC64_GOT_TPREL16_DS:
4978 case R_PPC64_GOT_TPREL16_LO_DS:
4979 case R_PPC64_GOT_TPREL16_HI:
4980 case R_PPC64_GOT_TPREL16_HA:
4981 tls_type = TLS_TLS | TLS_TPREL;
4982 goto dogot;
4983
4984 case R_PPC64_GOT_DTPREL16_DS:
4985 case R_PPC64_GOT_DTPREL16_LO_DS:
4986 case R_PPC64_GOT_DTPREL16_HI:
4987 case R_PPC64_GOT_DTPREL16_HA:
4988 tls_type = TLS_TLS | TLS_DTPREL;
4989 goto dogot;
4990
4991 case R_PPC64_GOT16:
4992 case R_PPC64_GOT16_DS:
4993 case R_PPC64_GOT16_HA:
4994 case R_PPC64_GOT16_HI:
4995 case R_PPC64_GOT16_LO:
4996 case R_PPC64_GOT16_LO_DS:
4997 dogot:
4998 {
4999 struct got_entry *ent;
5000
5001 if (h != NULL)
5002 ent = h->got.glist;
5003 else
5004 ent = local_got_ents[r_symndx];
5005
5006 for (; ent != NULL; ent = ent->next)
5007 if (ent->addend == rel->r_addend
5008 && ent->owner == abfd
5009 && ent->tls_type == tls_type)
5010 break;
5011 if (ent == NULL)
5012 abort ();
5013 if (ent->got.refcount > 0)
5014 ent->got.refcount -= 1;
5015 }
5016 break;
5017
5018 case R_PPC64_PLT16_HA:
5019 case R_PPC64_PLT16_HI:
5020 case R_PPC64_PLT16_LO:
5021 case R_PPC64_PLT32:
5022 case R_PPC64_PLT64:
5023 case R_PPC64_REL14:
5024 case R_PPC64_REL14_BRNTAKEN:
5025 case R_PPC64_REL14_BRTAKEN:
5026 case R_PPC64_REL24:
5027 if (h != NULL)
5028 {
5029 struct plt_entry *ent;
5030
5031 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5032 if (ent->addend == rel->r_addend)
5033 break;
5034 if (ent == NULL)
5035 abort ();
5036 if (ent->plt.refcount > 0)
5037 ent->plt.refcount -= 1;
5038 }
5039 break;
5040
5041 default:
5042 break;
5043 }
5044 }
5045 return TRUE;
5046 }
5047
5048 /* The maximum size of .sfpr. */
5049 #define SFPR_MAX (218*4)
5050
5051 struct sfpr_def_parms
5052 {
5053 const char *name;
5054 unsigned int lo, hi;
5055 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5056 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5057 };
5058
5059 /* Auto-generate _save*, _rest* functions in .sfpr. */
5060
5061 static unsigned int
5062 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5063 {
5064 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5065 unsigned int i;
5066 size_t len = strlen (parm->name);
5067 bfd_boolean writing = FALSE;
5068 char sym[20];
5069
5070 memcpy (sym, parm->name, len);
5071 sym[len + 2] = 0;
5072
5073 for (i = parm->lo; i <= parm->hi; i++)
5074 {
5075 struct elf_link_hash_entry *h;
5076
5077 sym[len + 0] = i / 10 + '0';
5078 sym[len + 1] = i % 10 + '0';
5079 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5080 if (h != NULL
5081 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5082 {
5083 h->root.type = bfd_link_hash_defined;
5084 h->root.u.def.section = htab->sfpr;
5085 h->root.u.def.value = htab->sfpr->size;
5086 h->type = STT_FUNC;
5087 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
5088 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5089 writing = TRUE;
5090 if (htab->sfpr->contents == NULL)
5091 {
5092 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5093 if (htab->sfpr->contents == NULL)
5094 return FALSE;
5095 }
5096 }
5097 if (writing)
5098 {
5099 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5100 if (i != parm->hi)
5101 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5102 else
5103 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5104 htab->sfpr->size = p - htab->sfpr->contents;
5105 }
5106 }
5107
5108 return TRUE;
5109 }
5110
5111 static bfd_byte *
5112 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5113 {
5114 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5115 return p + 4;
5116 }
5117
5118 static bfd_byte *
5119 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5120 {
5121 p = savegpr0 (abfd, p, r);
5122 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5123 p = p + 4;
5124 bfd_put_32 (abfd, BLR, p);
5125 return p + 4;
5126 }
5127
5128 static bfd_byte *
5129 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5130 {
5131 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5132 return p + 4;
5133 }
5134
5135 static bfd_byte *
5136 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5137 {
5138 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5139 p = p + 4;
5140 p = restgpr0 (abfd, p, r);
5141 bfd_put_32 (abfd, MTLR_R0, p);
5142 p = p + 4;
5143 if (r == 29)
5144 {
5145 p = restgpr0 (abfd, p, 30);
5146 p = restgpr0 (abfd, p, 31);
5147 }
5148 bfd_put_32 (abfd, BLR, p);
5149 return p + 4;
5150 }
5151
5152 static bfd_byte *
5153 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5154 {
5155 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5156 return p + 4;
5157 }
5158
5159 static bfd_byte *
5160 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5161 {
5162 p = savegpr1 (abfd, p, r);
5163 bfd_put_32 (abfd, BLR, p);
5164 return p + 4;
5165 }
5166
5167 static bfd_byte *
5168 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5169 {
5170 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5171 return p + 4;
5172 }
5173
5174 static bfd_byte *
5175 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5176 {
5177 p = restgpr1 (abfd, p, r);
5178 bfd_put_32 (abfd, BLR, p);
5179 return p + 4;
5180 }
5181
5182 static bfd_byte *
5183 savefpr (bfd *abfd, bfd_byte *p, int r)
5184 {
5185 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5186 return p + 4;
5187 }
5188
5189 static bfd_byte *
5190 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5191 {
5192 p = savefpr (abfd, p, r);
5193 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5194 p = p + 4;
5195 bfd_put_32 (abfd, BLR, p);
5196 return p + 4;
5197 }
5198
5199 static bfd_byte *
5200 restfpr (bfd *abfd, bfd_byte *p, int r)
5201 {
5202 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5203 return p + 4;
5204 }
5205
5206 static bfd_byte *
5207 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5208 {
5209 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5210 p = p + 4;
5211 p = restfpr (abfd, p, r);
5212 bfd_put_32 (abfd, MTLR_R0, p);
5213 p = p + 4;
5214 if (r == 29)
5215 {
5216 p = restfpr (abfd, p, 30);
5217 p = restfpr (abfd, p, 31);
5218 }
5219 bfd_put_32 (abfd, BLR, p);
5220 return p + 4;
5221 }
5222
5223 static bfd_byte *
5224 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5225 {
5226 p = savefpr (abfd, p, r);
5227 bfd_put_32 (abfd, BLR, p);
5228 return p + 4;
5229 }
5230
5231 static bfd_byte *
5232 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5233 {
5234 p = restfpr (abfd, p, r);
5235 bfd_put_32 (abfd, BLR, p);
5236 return p + 4;
5237 }
5238
5239 static bfd_byte *
5240 savevr (bfd *abfd, bfd_byte *p, int r)
5241 {
5242 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5243 p = p + 4;
5244 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5245 return p + 4;
5246 }
5247
5248 static bfd_byte *
5249 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5250 {
5251 p = savevr (abfd, p, r);
5252 bfd_put_32 (abfd, BLR, p);
5253 return p + 4;
5254 }
5255
5256 static bfd_byte *
5257 restvr (bfd *abfd, bfd_byte *p, int r)
5258 {
5259 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5260 p = p + 4;
5261 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5262 return p + 4;
5263 }
5264
5265 static bfd_byte *
5266 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5267 {
5268 p = restvr (abfd, p, r);
5269 bfd_put_32 (abfd, BLR, p);
5270 return p + 4;
5271 }
5272
5273 /* Called via elf_link_hash_traverse to transfer dynamic linking
5274 information on function code symbol entries to their corresponding
5275 function descriptor symbol entries. */
5276
5277 static bfd_boolean
5278 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5279 {
5280 struct bfd_link_info *info;
5281 struct ppc_link_hash_table *htab;
5282 struct plt_entry *ent;
5283 struct ppc_link_hash_entry *fh;
5284 struct ppc_link_hash_entry *fdh;
5285 bfd_boolean force_local;
5286
5287 fh = (struct ppc_link_hash_entry *) h;
5288 if (fh->elf.root.type == bfd_link_hash_indirect)
5289 return TRUE;
5290
5291 if (fh->elf.root.type == bfd_link_hash_warning)
5292 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5293
5294 info = inf;
5295 htab = ppc_hash_table (info);
5296
5297 /* Resolve undefined references to dot-symbols as the value
5298 in the function descriptor, if we have one in a regular object.
5299 This is to satisfy cases like ".quad .foo". Calls to functions
5300 in dynamic objects are handled elsewhere. */
5301 if (fh->elf.root.type == bfd_link_hash_undefweak
5302 && fh->was_undefined
5303 && (fh->oh->elf.root.type == bfd_link_hash_defined
5304 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5305 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5306 && opd_entry_value (fh->oh->elf.root.u.def.section,
5307 fh->oh->elf.root.u.def.value,
5308 &fh->elf.root.u.def.section,
5309 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5310 {
5311 fh->elf.root.type = fh->oh->elf.root.type;
5312 fh->elf.elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
5313 }
5314
5315 /* If this is a function code symbol, transfer dynamic linking
5316 information to the function descriptor symbol. */
5317 if (!fh->is_func)
5318 return TRUE;
5319
5320 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5321 if (ent->plt.refcount > 0)
5322 break;
5323 if (ent == NULL
5324 || fh->elf.root.root.string[0] != '.'
5325 || fh->elf.root.root.string[1] == '\0')
5326 return TRUE;
5327
5328 /* Find the corresponding function descriptor symbol. Create it
5329 as undefined if necessary. */
5330
5331 fdh = get_fdh (fh, htab);
5332 if (fdh != NULL)
5333 while (fdh->elf.root.type == bfd_link_hash_indirect
5334 || fdh->elf.root.type == bfd_link_hash_warning)
5335 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5336
5337 if (fdh == NULL
5338 && info->shared
5339 && (fh->elf.root.type == bfd_link_hash_undefined
5340 || fh->elf.root.type == bfd_link_hash_undefweak))
5341 {
5342 bfd *abfd;
5343 asymbol *newsym;
5344 struct bfd_link_hash_entry *bh;
5345
5346 abfd = fh->elf.root.u.undef.abfd;
5347 newsym = bfd_make_empty_symbol (abfd);
5348 newsym->name = fh->elf.root.root.string + 1;
5349 newsym->section = bfd_und_section_ptr;
5350 newsym->value = 0;
5351 newsym->flags = BSF_OBJECT;
5352 if (fh->elf.root.type == bfd_link_hash_undefweak)
5353 newsym->flags |= BSF_WEAK;
5354
5355 bh = &fdh->elf.root;
5356 if ( !(_bfd_generic_link_add_one_symbol
5357 (info, abfd, newsym->name, newsym->flags,
5358 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
5359 {
5360 return FALSE;
5361 }
5362 fdh = (struct ppc_link_hash_entry *) bh;
5363 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
5364 fdh->elf.size = 24;
5365 fdh->elf.type = STT_OBJECT;
5366 }
5367
5368 if (fdh != NULL
5369 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
5370 && (info->shared
5371 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5372 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
5373 || (fdh->elf.root.type == bfd_link_hash_undefweak
5374 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5375 {
5376 if (fdh->elf.dynindx == -1)
5377 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5378 return FALSE;
5379 fdh->elf.elf_link_hash_flags
5380 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
5381 | ELF_LINK_HASH_REF_DYNAMIC
5382 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
5383 | ELF_LINK_NON_GOT_REF));
5384 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5385 {
5386 struct plt_entry **ep = &fdh->elf.plt.plist;
5387 while (*ep != NULL)
5388 ep = &(*ep)->next;
5389 *ep = fh->elf.plt.plist;
5390 fh->elf.plt.plist = NULL;
5391 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
5392 }
5393 fdh->is_func_descriptor = 1;
5394 fdh->oh = fh;
5395 fh->oh = fdh;
5396 }
5397
5398 /* Now that the info is on the function descriptor, clear the
5399 function code sym info. Any function code syms for which we
5400 don't have a definition in a regular file, we force local.
5401 This prevents a shared library from exporting syms that have
5402 been imported from another library. Function code syms that
5403 are really in the library we must leave global to prevent the
5404 linker dragging in a definition from a static library. */
5405 force_local
5406 = (info->shared
5407 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5408 || fdh == NULL
5409 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5410 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
5411 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5412
5413 return TRUE;
5414 }
5415
5416 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5417 this hook to a) provide some gcc support functions, and b) transfer
5418 dynamic linking information gathered so far on function code symbol
5419 entries, to their corresponding function descriptor symbol entries. */
5420
5421 static bfd_boolean
5422 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5423 struct bfd_link_info *info)
5424 {
5425 struct ppc_link_hash_table *htab;
5426 unsigned int i;
5427 const struct sfpr_def_parms funcs[] =
5428 {
5429 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5430 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5431 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5432 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5433 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5434 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5435 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5436 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5437 { "._savef", 14, 31, savefpr, savefpr1_tail },
5438 { "._restf", 14, 31, restfpr, restfpr1_tail },
5439 { "_savevr_", 20, 31, savevr, savevr_tail },
5440 { "_restvr_", 20, 31, restvr, restvr_tail }
5441 };
5442
5443 htab = ppc_hash_table (info);
5444 if (htab->sfpr == NULL)
5445 /* We don't have any relocs. */
5446 return TRUE;
5447
5448 /* Provide any missing _save* and _rest* functions. */
5449 htab->sfpr->size = 0;
5450 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5451 if (!sfpr_define (info, &funcs[i]))
5452 return FALSE;
5453
5454 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5455
5456 if (htab->sfpr->size == 0)
5457 _bfd_strip_section_from_output (info, htab->sfpr);
5458
5459 return TRUE;
5460 }
5461
5462 /* Adjust a symbol defined by a dynamic object and referenced by a
5463 regular object. The current definition is in some section of the
5464 dynamic object, but we're not including those sections. We have to
5465 change the definition to something the rest of the link can
5466 understand. */
5467
5468 static bfd_boolean
5469 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5470 struct elf_link_hash_entry *h)
5471 {
5472 struct ppc_link_hash_table *htab;
5473 asection *s;
5474 unsigned int power_of_two;
5475
5476 htab = ppc_hash_table (info);
5477
5478 /* Deal with function syms. */
5479 if (h->type == STT_FUNC
5480 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
5481 {
5482 /* Clear procedure linkage table information for any symbol that
5483 won't need a .plt entry. */
5484 struct plt_entry *ent;
5485 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5486 if (ent->plt.refcount > 0)
5487 break;
5488 if (ent == NULL
5489 || SYMBOL_CALLS_LOCAL (info, h)
5490 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5491 && h->root.type == bfd_link_hash_undefweak))
5492 {
5493 h->plt.plist = NULL;
5494 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5495 }
5496 }
5497 else
5498 h->plt.plist = NULL;
5499
5500 /* If this is a weak symbol, and there is a real definition, the
5501 processor independent code will have arranged for us to see the
5502 real definition first, and we can just use the same value. */
5503 if (h->weakdef != NULL)
5504 {
5505 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
5506 || h->weakdef->root.type == bfd_link_hash_defweak);
5507 h->root.u.def.section = h->weakdef->root.u.def.section;
5508 h->root.u.def.value = h->weakdef->root.u.def.value;
5509 if (ELIMINATE_COPY_RELOCS)
5510 h->elf_link_hash_flags
5511 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
5512 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
5513 return TRUE;
5514 }
5515
5516 /* If we are creating a shared library, we must presume that the
5517 only references to the symbol are via the global offset table.
5518 For such cases we need not do anything here; the relocations will
5519 be handled correctly by relocate_section. */
5520 if (info->shared)
5521 return TRUE;
5522
5523 /* If there are no references to this symbol that do not use the
5524 GOT, we don't need to generate a copy reloc. */
5525 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
5526 return TRUE;
5527
5528 if (ELIMINATE_COPY_RELOCS)
5529 {
5530 struct ppc_link_hash_entry * eh;
5531 struct ppc_dyn_relocs *p;
5532
5533 eh = (struct ppc_link_hash_entry *) h;
5534 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5535 {
5536 s = p->sec->output_section;
5537 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5538 break;
5539 }
5540
5541 /* If we didn't find any dynamic relocs in read-only sections, then
5542 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5543 if (p == NULL)
5544 {
5545 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
5546 return TRUE;
5547 }
5548 }
5549
5550 if (h->plt.plist != NULL)
5551 {
5552 /* We should never get here, but unfortunately there are versions
5553 of gcc out there that improperly (for this ABI) put initialized
5554 function pointers, vtable refs and suchlike in read-only
5555 sections. Allow them to proceed, but warn that this might
5556 break at runtime. */
5557 (*_bfd_error_handler)
5558 (_("copy reloc against `%s' requires lazy plt linking; "
5559 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5560 h->root.root.string);
5561 }
5562
5563 /* This is a reference to a symbol defined by a dynamic object which
5564 is not a function. */
5565
5566 /* We must allocate the symbol in our .dynbss section, which will
5567 become part of the .bss section of the executable. There will be
5568 an entry for this symbol in the .dynsym section. The dynamic
5569 object will contain position independent code, so all references
5570 from the dynamic object to this symbol will go through the global
5571 offset table. The dynamic linker will use the .dynsym entry to
5572 determine the address it must put in the global offset table, so
5573 both the dynamic object and the regular object will refer to the
5574 same memory location for the variable. */
5575
5576 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5577 to copy the initial value out of the dynamic object and into the
5578 runtime process image. We need to remember the offset into the
5579 .rela.bss section we are going to use. */
5580 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5581 {
5582 htab->relbss->size += sizeof (Elf64_External_Rela);
5583 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
5584 }
5585
5586 /* We need to figure out the alignment required for this symbol. I
5587 have no idea how ELF linkers handle this. */
5588 power_of_two = bfd_log2 (h->size);
5589 if (power_of_two > 4)
5590 power_of_two = 4;
5591
5592 /* Apply the required alignment. */
5593 s = htab->dynbss;
5594 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5595 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5596 {
5597 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5598 return FALSE;
5599 }
5600
5601 /* Define the symbol as being at this point in the section. */
5602 h->root.u.def.section = s;
5603 h->root.u.def.value = s->size;
5604
5605 /* Increment the section size to make room for the symbol. */
5606 s->size += h->size;
5607
5608 return TRUE;
5609 }
5610
5611 /* If given a function descriptor symbol, hide both the function code
5612 sym and the descriptor. */
5613 static void
5614 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5615 struct elf_link_hash_entry *h,
5616 bfd_boolean force_local)
5617 {
5618 struct ppc_link_hash_entry *eh;
5619 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5620
5621 eh = (struct ppc_link_hash_entry *) h;
5622 if (eh->is_func_descriptor)
5623 {
5624 struct ppc_link_hash_entry *fh = eh->oh;
5625
5626 if (fh == NULL)
5627 {
5628 const char *p, *q;
5629 struct ppc_link_hash_table *htab;
5630 char save;
5631
5632 /* We aren't supposed to use alloca in BFD because on
5633 systems which do not have alloca the version in libiberty
5634 calls xmalloc, which might cause the program to crash
5635 when it runs out of memory. This function doesn't have a
5636 return status, so there's no way to gracefully return an
5637 error. So cheat. We know that string[-1] can be safely
5638 accessed; It's either a string in an ELF string table,
5639 or allocated in an objalloc structure. */
5640
5641 p = eh->elf.root.root.string - 1;
5642 save = *p;
5643 *(char *) p = '.';
5644 htab = ppc_hash_table (info);
5645 fh = (struct ppc_link_hash_entry *)
5646 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5647 *(char *) p = save;
5648
5649 /* Unfortunately, if it so happens that the string we were
5650 looking for was allocated immediately before this string,
5651 then we overwrote the string terminator. That's the only
5652 reason the lookup should fail. */
5653 if (fh == NULL)
5654 {
5655 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5656 while (q >= eh->elf.root.root.string && *q == *p)
5657 --q, --p;
5658 if (q < eh->elf.root.root.string && *p == '.')
5659 fh = (struct ppc_link_hash_entry *)
5660 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5661 }
5662 if (fh != NULL)
5663 {
5664 eh->oh = fh;
5665 fh->oh = eh;
5666 }
5667 }
5668 if (fh != NULL)
5669 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5670 }
5671 }
5672
5673 static bfd_boolean
5674 get_sym_h (struct elf_link_hash_entry **hp,
5675 Elf_Internal_Sym **symp,
5676 asection **symsecp,
5677 char **tls_maskp,
5678 Elf_Internal_Sym **locsymsp,
5679 unsigned long r_symndx,
5680 bfd *ibfd)
5681 {
5682 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5683
5684 if (r_symndx >= symtab_hdr->sh_info)
5685 {
5686 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5687 struct elf_link_hash_entry *h;
5688
5689 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5690 while (h->root.type == bfd_link_hash_indirect
5691 || h->root.type == bfd_link_hash_warning)
5692 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5693
5694 if (hp != NULL)
5695 *hp = h;
5696
5697 if (symp != NULL)
5698 *symp = NULL;
5699
5700 if (symsecp != NULL)
5701 {
5702 asection *symsec = NULL;
5703 if (h->root.type == bfd_link_hash_defined
5704 || h->root.type == bfd_link_hash_defweak)
5705 symsec = h->root.u.def.section;
5706 *symsecp = symsec;
5707 }
5708
5709 if (tls_maskp != NULL)
5710 {
5711 struct ppc_link_hash_entry *eh;
5712
5713 eh = (struct ppc_link_hash_entry *) h;
5714 *tls_maskp = &eh->tls_mask;
5715 }
5716 }
5717 else
5718 {
5719 Elf_Internal_Sym *sym;
5720 Elf_Internal_Sym *locsyms = *locsymsp;
5721
5722 if (locsyms == NULL)
5723 {
5724 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5725 if (locsyms == NULL)
5726 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5727 symtab_hdr->sh_info,
5728 0, NULL, NULL, NULL);
5729 if (locsyms == NULL)
5730 return FALSE;
5731 *locsymsp = locsyms;
5732 }
5733 sym = locsyms + r_symndx;
5734
5735 if (hp != NULL)
5736 *hp = NULL;
5737
5738 if (symp != NULL)
5739 *symp = sym;
5740
5741 if (symsecp != NULL)
5742 {
5743 asection *symsec = NULL;
5744 if ((sym->st_shndx != SHN_UNDEF
5745 && sym->st_shndx < SHN_LORESERVE)
5746 || sym->st_shndx > SHN_HIRESERVE)
5747 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5748 *symsecp = symsec;
5749 }
5750
5751 if (tls_maskp != NULL)
5752 {
5753 struct got_entry **lgot_ents;
5754 char *tls_mask;
5755
5756 tls_mask = NULL;
5757 lgot_ents = elf_local_got_ents (ibfd);
5758 if (lgot_ents != NULL)
5759 {
5760 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5761 tls_mask = &lgot_masks[r_symndx];
5762 }
5763 *tls_maskp = tls_mask;
5764 }
5765 }
5766 return TRUE;
5767 }
5768
5769 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5770 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5771 type suitable for optimization, and 1 otherwise. */
5772
5773 static int
5774 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5775 Elf_Internal_Sym **locsymsp,
5776 const Elf_Internal_Rela *rel, bfd *ibfd)
5777 {
5778 unsigned long r_symndx;
5779 int next_r;
5780 struct elf_link_hash_entry *h;
5781 Elf_Internal_Sym *sym;
5782 asection *sec;
5783 bfd_vma off;
5784
5785 r_symndx = ELF64_R_SYM (rel->r_info);
5786 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5787 return 0;
5788
5789 if ((*tls_maskp != NULL && **tls_maskp != 0)
5790 || sec == NULL
5791 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5792 return 1;
5793
5794 /* Look inside a TOC section too. */
5795 if (h != NULL)
5796 {
5797 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5798 off = h->root.u.def.value;
5799 }
5800 else
5801 off = sym->st_value;
5802 off += rel->r_addend;
5803 BFD_ASSERT (off % 8 == 0);
5804 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5805 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5806 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5807 return 0;
5808 if (toc_symndx != NULL)
5809 *toc_symndx = r_symndx;
5810 if ((h == NULL
5811 || ((h->root.type == bfd_link_hash_defined
5812 || h->root.type == bfd_link_hash_defweak)
5813 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5814 && (next_r == -1 || next_r == -2))
5815 return 1 - next_r;
5816 return 1;
5817 }
5818
5819 /* Adjust all global syms defined in opd sections. In gcc generated
5820 code for the old ABI, these will already have been done. */
5821
5822 static bfd_boolean
5823 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5824 {
5825 struct ppc_link_hash_entry *eh;
5826 asection *sym_sec;
5827 long *opd_adjust;
5828
5829 if (h->root.type == bfd_link_hash_indirect)
5830 return TRUE;
5831
5832 if (h->root.type == bfd_link_hash_warning)
5833 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5834
5835 if (h->root.type != bfd_link_hash_defined
5836 && h->root.type != bfd_link_hash_defweak)
5837 return TRUE;
5838
5839 eh = (struct ppc_link_hash_entry *) h;
5840 if (eh->adjust_done)
5841 return TRUE;
5842
5843 sym_sec = eh->elf.root.u.def.section;
5844 opd_adjust = get_opd_info (sym_sec);
5845 if (opd_adjust != NULL)
5846 {
5847 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5848 if (adjust == -1)
5849 {
5850 /* This entry has been deleted. */
5851 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5852 if (dsec == NULL)
5853 {
5854 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5855 if (elf_discarded_section (dsec))
5856 {
5857 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5858 break;
5859 }
5860 }
5861 eh->elf.root.u.def.value = 0;
5862 eh->elf.root.u.def.section = dsec;
5863 }
5864 else
5865 eh->elf.root.u.def.value += adjust;
5866 eh->adjust_done = 1;
5867 }
5868 return TRUE;
5869 }
5870
5871 /* Remove unused Official Procedure Descriptor entries. Currently we
5872 only remove those associated with functions in discarded link-once
5873 sections, or weakly defined functions that have been overridden. It
5874 would be possible to remove many more entries for statically linked
5875 applications. */
5876
5877 bfd_boolean
5878 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5879 bfd_boolean non_overlapping)
5880 {
5881 bfd *ibfd;
5882 bfd_boolean some_edited = FALSE;
5883 asection *need_pad = NULL;
5884
5885 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5886 {
5887 asection *sec;
5888 Elf_Internal_Rela *relstart, *rel, *relend;
5889 Elf_Internal_Shdr *symtab_hdr;
5890 Elf_Internal_Sym *local_syms;
5891 struct elf_link_hash_entry **sym_hashes;
5892 bfd_vma offset;
5893 bfd_size_type amt;
5894 long *opd_adjust;
5895 bfd_boolean need_edit, add_aux_fields;
5896 bfd_size_type cnt_16b = 0;
5897
5898 sec = bfd_get_section_by_name (ibfd, ".opd");
5899 if (sec == NULL)
5900 continue;
5901
5902 amt = sec->size * sizeof (long) / 8;
5903 opd_adjust = get_opd_info (sec);
5904 if (opd_adjust == NULL)
5905 {
5906 /* Must be a ld -r link. ie. check_relocs hasn't been
5907 called. */
5908 opd_adjust = bfd_zalloc (obfd, amt);
5909 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5910 }
5911 memset (opd_adjust, 0, amt);
5912
5913 if (sec->output_section == bfd_abs_section_ptr)
5914 continue;
5915
5916 /* Look through the section relocs. */
5917 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5918 continue;
5919
5920 local_syms = NULL;
5921 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5922 sym_hashes = elf_sym_hashes (ibfd);
5923
5924 /* Read the relocations. */
5925 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5926 info->keep_memory);
5927 if (relstart == NULL)
5928 return FALSE;
5929
5930 /* First run through the relocs to check they are sane, and to
5931 determine whether we need to edit this opd section. */
5932 need_edit = FALSE;
5933 need_pad = sec;
5934 offset = 0;
5935 relend = relstart + sec->reloc_count;
5936 for (rel = relstart; rel < relend; )
5937 {
5938 enum elf_ppc64_reloc_type r_type;
5939 unsigned long r_symndx;
5940 asection *sym_sec;
5941 struct elf_link_hash_entry *h;
5942 Elf_Internal_Sym *sym;
5943
5944 /* .opd contains a regular array of 16 or 24 byte entries. We're
5945 only interested in the reloc pointing to a function entry
5946 point. */
5947 if (rel->r_offset != offset
5948 || rel + 1 >= relend
5949 || (rel + 1)->r_offset != offset + 8)
5950 {
5951 /* If someone messes with .opd alignment then after a
5952 "ld -r" we might have padding in the middle of .opd.
5953 Also, there's nothing to prevent someone putting
5954 something silly in .opd with the assembler. No .opd
5955 optimization for them! */
5956 broken_opd:
5957 (*_bfd_error_handler)
5958 (_("%B: .opd is not a regular array of opd entries"), ibfd);
5959 need_edit = FALSE;
5960 break;
5961 }
5962
5963 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5964 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5965 {
5966 (*_bfd_error_handler)
5967 (_("%B: unexpected reloc type %u in .opd section"),
5968 ibfd, r_type);
5969 need_edit = FALSE;
5970 break;
5971 }
5972
5973 r_symndx = ELF64_R_SYM (rel->r_info);
5974 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5975 r_symndx, ibfd))
5976 goto error_ret;
5977
5978 if (sym_sec == NULL || sym_sec->owner == NULL)
5979 {
5980 const char *sym_name;
5981 if (h != NULL)
5982 sym_name = h->root.root.string;
5983 else
5984 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5985
5986 (*_bfd_error_handler)
5987 (_("%B: undefined sym `%s' in .opd section"),
5988 ibfd, sym_name);
5989 need_edit = FALSE;
5990 break;
5991 }
5992
5993 /* opd entries are always for functions defined in the
5994 current input bfd. If the symbol isn't defined in the
5995 input bfd, then we won't be using the function in this
5996 bfd; It must be defined in a linkonce section in another
5997 bfd, or is weak. It's also possible that we are
5998 discarding the function due to a linker script /DISCARD/,
5999 which we test for via the output_section. */
6000 if (sym_sec->owner != ibfd
6001 || sym_sec->output_section == bfd_abs_section_ptr)
6002 need_edit = TRUE;
6003
6004 rel += 2;
6005 if (rel == relend
6006 || (rel + 1 == relend && rel->r_offset == offset + 16))
6007 {
6008 if (sec->size == offset + 24)
6009 {
6010 need_pad = NULL;
6011 break;
6012 }
6013 if (rel == relend && sec->size == offset + 16)
6014 {
6015 cnt_16b++;
6016 break;
6017 }
6018 goto broken_opd;
6019 }
6020
6021 if (rel->r_offset == offset + 24)
6022 offset += 24;
6023 else if (rel->r_offset != offset + 16)
6024 goto broken_opd;
6025 else if (rel + 1 < relend
6026 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6027 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6028 {
6029 offset += 16;
6030 cnt_16b++;
6031 }
6032 else if (rel + 2 < relend
6033 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6034 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6035 {
6036 offset += 24;
6037 rel += 1;
6038 }
6039 else
6040 goto broken_opd;
6041 }
6042
6043 add_aux_fields = non_overlapping && cnt_16b > 0;
6044
6045 if (need_edit || add_aux_fields)
6046 {
6047 Elf_Internal_Rela *write_rel;
6048 bfd_byte *rptr, *wptr;
6049 bfd_byte *new_contents = NULL;
6050 bfd_boolean skip;
6051 long opd_ent_size;
6052
6053 /* This seems a waste of time as input .opd sections are all
6054 zeros as generated by gcc, but I suppose there's no reason
6055 this will always be so. We might start putting something in
6056 the third word of .opd entries. */
6057 if ((sec->flags & SEC_IN_MEMORY) == 0)
6058 {
6059 bfd_byte *loc;
6060 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6061 {
6062 if (loc != NULL)
6063 free (loc);
6064 error_ret:
6065 if (local_syms != NULL
6066 && symtab_hdr->contents != (unsigned char *) local_syms)
6067 free (local_syms);
6068 if (elf_section_data (sec)->relocs != relstart)
6069 free (relstart);
6070 return FALSE;
6071 }
6072 sec->contents = loc;
6073 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6074 }
6075
6076 elf_section_data (sec)->relocs = relstart;
6077
6078 wptr = sec->contents;
6079 rptr = sec->contents;
6080 new_contents = sec->contents;
6081
6082 if (add_aux_fields)
6083 {
6084 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6085 if (new_contents == NULL)
6086 return FALSE;
6087 need_pad = FALSE;
6088 wptr = new_contents;
6089 }
6090
6091 write_rel = relstart;
6092 skip = FALSE;
6093 offset = 0;
6094 opd_ent_size = 0;
6095 for (rel = relstart; rel < relend; rel++)
6096 {
6097 unsigned long r_symndx;
6098 asection *sym_sec;
6099 struct elf_link_hash_entry *h;
6100 Elf_Internal_Sym *sym;
6101
6102 r_symndx = ELF64_R_SYM (rel->r_info);
6103 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6104 r_symndx, ibfd))
6105 goto error_ret;
6106
6107 if (rel->r_offset == offset)
6108 {
6109 struct ppc_link_hash_entry *fdh = NULL;
6110
6111 /* See if the .opd entry is full 24 byte or
6112 16 byte (with fd_aux entry overlapped with next
6113 fd_func). */
6114 opd_ent_size = 24;
6115 if ((rel + 2 == relend && sec->size == offset + 16)
6116 || (rel + 3 < relend
6117 && rel[2].r_offset == offset + 16
6118 && rel[3].r_offset == offset + 24
6119 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6120 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6121 opd_ent_size = 16;
6122
6123 if (h != NULL
6124 && h->root.root.string[0] == '.')
6125 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6126 ppc_hash_table (info));
6127
6128 skip = (sym_sec->owner != ibfd
6129 || sym_sec->output_section == bfd_abs_section_ptr);
6130 if (skip)
6131 {
6132 if (fdh != NULL && sym_sec->owner == ibfd)
6133 {
6134 /* Arrange for the function descriptor sym
6135 to be dropped. */
6136 fdh->elf.root.u.def.value = 0;
6137 fdh->elf.root.u.def.section = sym_sec;
6138 }
6139 opd_adjust[rel->r_offset / 8] = -1;
6140 }
6141 else
6142 {
6143 /* We'll be keeping this opd entry. */
6144
6145 if (fdh != NULL)
6146 {
6147 /* Redefine the function descriptor symbol to
6148 this location in the opd section. It is
6149 necessary to update the value here rather
6150 than using an array of adjustments as we do
6151 for local symbols, because various places
6152 in the generic ELF code use the value
6153 stored in u.def.value. */
6154 fdh->elf.root.u.def.value = wptr - new_contents;
6155 fdh->adjust_done = 1;
6156 }
6157
6158 /* Local syms are a bit tricky. We could
6159 tweak them as they can be cached, but
6160 we'd need to look through the local syms
6161 for the function descriptor sym which we
6162 don't have at the moment. So keep an
6163 array of adjustments. */
6164 opd_adjust[rel->r_offset / 8]
6165 = (wptr - new_contents) - (rptr - sec->contents);
6166
6167 if (wptr != rptr)
6168 memcpy (wptr, rptr, opd_ent_size);
6169 wptr += opd_ent_size;
6170 if (add_aux_fields && opd_ent_size == 16)
6171 {
6172 memset (wptr, '\0', 8);
6173 wptr += 8;
6174 }
6175 }
6176 rptr += opd_ent_size;
6177 offset += opd_ent_size;
6178 }
6179
6180 if (skip)
6181 {
6182 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6183 if (info->shared)
6184 {
6185 /* We won't be needing dynamic relocs here. */
6186 struct ppc_dyn_relocs **pp;
6187 struct ppc_dyn_relocs *p;
6188
6189 if (h != NULL)
6190 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6191 else if (sym_sec != NULL)
6192 pp = ((struct ppc_dyn_relocs **)
6193 &elf_section_data (sym_sec)->local_dynrel);
6194 else
6195 pp = ((struct ppc_dyn_relocs **)
6196 &elf_section_data (sec)->local_dynrel);
6197 while ((p = *pp) != NULL)
6198 {
6199 if (p->sec == sec)
6200 {
6201 p->count -= 1;
6202 if (p->count == 0)
6203 *pp = p->next;
6204 break;
6205 }
6206 pp = &p->next;
6207 }
6208 }
6209 }
6210 else
6211 {
6212 /* We need to adjust any reloc offsets to point to the
6213 new opd entries. While we're at it, we may as well
6214 remove redundant relocs. */
6215 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6216 if (write_rel != rel)
6217 memcpy (write_rel, rel, sizeof (*rel));
6218 ++write_rel;
6219 }
6220 }
6221
6222 sec->size = wptr - new_contents;
6223 sec->reloc_count = write_rel - relstart;
6224 if (add_aux_fields)
6225 {
6226 free (sec->contents);
6227 sec->contents = new_contents;
6228 }
6229
6230 /* Fudge the size too, as this is used later in
6231 elf_bfd_final_link if we are emitting relocs. */
6232 elf_section_data (sec)->rel_hdr.sh_size
6233 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6234 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6235 some_edited = TRUE;
6236 }
6237 else if (elf_section_data (sec)->relocs != relstart)
6238 free (relstart);
6239
6240 if (local_syms != NULL
6241 && symtab_hdr->contents != (unsigned char *) local_syms)
6242 {
6243 if (!info->keep_memory)
6244 free (local_syms);
6245 else
6246 symtab_hdr->contents = (unsigned char *) local_syms;
6247 }
6248 }
6249
6250 if (some_edited)
6251 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6252
6253 /* If we are doing a final link and the last .opd entry is just 16 byte
6254 long, add a 8 byte padding after it. */
6255 if (need_pad != NULL && !info->relocatable)
6256 {
6257 bfd_byte *p;
6258
6259 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6260 {
6261 BFD_ASSERT (need_pad->size > 0);
6262
6263 p = bfd_malloc (need_pad->size + 8);
6264 if (p == NULL)
6265 return FALSE;
6266
6267 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6268 p, 0, need_pad->size))
6269 return FALSE;
6270
6271 need_pad->contents = p;
6272 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6273 }
6274 else
6275 {
6276 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6277 if (p == NULL)
6278 return FALSE;
6279
6280 need_pad->contents = p;
6281 }
6282
6283 memset (need_pad->contents + need_pad->size, 0, 8);
6284 need_pad->size += 8;
6285 }
6286
6287 return TRUE;
6288 }
6289
6290 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6291
6292 asection *
6293 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6294 {
6295 struct ppc_link_hash_table *htab;
6296
6297 htab = ppc_hash_table (info);
6298 if (htab->tls_get_addr != NULL)
6299 {
6300 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6301
6302 while (h->elf.root.type == bfd_link_hash_indirect
6303 || h->elf.root.type == bfd_link_hash_warning)
6304 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6305
6306 htab->tls_get_addr = h;
6307
6308 if (htab->tls_get_addr_fd == NULL
6309 && h->oh != NULL
6310 && h->oh->is_func_descriptor)
6311 htab->tls_get_addr_fd = h->oh;
6312 }
6313
6314 if (htab->tls_get_addr_fd != NULL)
6315 {
6316 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6317
6318 while (h->elf.root.type == bfd_link_hash_indirect
6319 || h->elf.root.type == bfd_link_hash_warning)
6320 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6321
6322 htab->tls_get_addr_fd = h;
6323 }
6324
6325 return _bfd_elf_tls_setup (obfd, info);
6326 }
6327
6328 /* Run through all the TLS relocs looking for optimization
6329 opportunities. The linker has been hacked (see ppc64elf.em) to do
6330 a preliminary section layout so that we know the TLS segment
6331 offsets. We can't optimize earlier because some optimizations need
6332 to know the tp offset, and we need to optimize before allocating
6333 dynamic relocations. */
6334
6335 bfd_boolean
6336 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6337 {
6338 bfd *ibfd;
6339 asection *sec;
6340 struct ppc_link_hash_table *htab;
6341
6342 if (info->relocatable || info->shared)
6343 return TRUE;
6344
6345 htab = ppc_hash_table (info);
6346 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6347 {
6348 Elf_Internal_Sym *locsyms = NULL;
6349
6350 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6351 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6352 {
6353 Elf_Internal_Rela *relstart, *rel, *relend;
6354 int expecting_tls_get_addr;
6355
6356 /* Read the relocations. */
6357 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6358 info->keep_memory);
6359 if (relstart == NULL)
6360 return FALSE;
6361
6362 expecting_tls_get_addr = 0;
6363 relend = relstart + sec->reloc_count;
6364 for (rel = relstart; rel < relend; rel++)
6365 {
6366 enum elf_ppc64_reloc_type r_type;
6367 unsigned long r_symndx;
6368 struct elf_link_hash_entry *h;
6369 Elf_Internal_Sym *sym;
6370 asection *sym_sec;
6371 char *tls_mask;
6372 char tls_set, tls_clear, tls_type = 0;
6373 bfd_vma value;
6374 bfd_boolean ok_tprel, is_local;
6375
6376 r_symndx = ELF64_R_SYM (rel->r_info);
6377 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6378 r_symndx, ibfd))
6379 {
6380 err_free_rel:
6381 if (elf_section_data (sec)->relocs != relstart)
6382 free (relstart);
6383 if (locsyms != NULL
6384 && (elf_tdata (ibfd)->symtab_hdr.contents
6385 != (unsigned char *) locsyms))
6386 free (locsyms);
6387 return FALSE;
6388 }
6389
6390 if (h != NULL)
6391 {
6392 if (h->root.type != bfd_link_hash_defined
6393 && h->root.type != bfd_link_hash_defweak)
6394 continue;
6395 value = h->root.u.def.value;
6396 }
6397 else
6398 /* Symbols referenced by TLS relocs must be of type
6399 STT_TLS. So no need for .opd local sym adjust. */
6400 value = sym->st_value;
6401
6402 ok_tprel = FALSE;
6403 is_local = FALSE;
6404 if (h == NULL
6405 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6406 {
6407 is_local = TRUE;
6408 value += sym_sec->output_offset;
6409 value += sym_sec->output_section->vma;
6410 value -= htab->elf.tls_sec->vma;
6411 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6412 < (bfd_vma) 1 << 32);
6413 }
6414
6415 r_type = ELF64_R_TYPE (rel->r_info);
6416 switch (r_type)
6417 {
6418 case R_PPC64_GOT_TLSLD16:
6419 case R_PPC64_GOT_TLSLD16_LO:
6420 case R_PPC64_GOT_TLSLD16_HI:
6421 case R_PPC64_GOT_TLSLD16_HA:
6422 /* These relocs should never be against a symbol
6423 defined in a shared lib. Leave them alone if
6424 that turns out to be the case. */
6425 ppc64_tlsld_got (ibfd)->refcount -= 1;
6426 if (!is_local)
6427 continue;
6428
6429 /* LD -> LE */
6430 tls_set = 0;
6431 tls_clear = TLS_LD;
6432 tls_type = TLS_TLS | TLS_LD;
6433 expecting_tls_get_addr = 1;
6434 break;
6435
6436 case R_PPC64_GOT_TLSGD16:
6437 case R_PPC64_GOT_TLSGD16_LO:
6438 case R_PPC64_GOT_TLSGD16_HI:
6439 case R_PPC64_GOT_TLSGD16_HA:
6440 if (ok_tprel)
6441 /* GD -> LE */
6442 tls_set = 0;
6443 else
6444 /* GD -> IE */
6445 tls_set = TLS_TLS | TLS_TPRELGD;
6446 tls_clear = TLS_GD;
6447 tls_type = TLS_TLS | TLS_GD;
6448 expecting_tls_get_addr = 1;
6449 break;
6450
6451 case R_PPC64_GOT_TPREL16_DS:
6452 case R_PPC64_GOT_TPREL16_LO_DS:
6453 case R_PPC64_GOT_TPREL16_HI:
6454 case R_PPC64_GOT_TPREL16_HA:
6455 expecting_tls_get_addr = 0;
6456 if (ok_tprel)
6457 {
6458 /* IE -> LE */
6459 tls_set = 0;
6460 tls_clear = TLS_TPREL;
6461 tls_type = TLS_TLS | TLS_TPREL;
6462 break;
6463 }
6464 else
6465 continue;
6466
6467 case R_PPC64_REL14:
6468 case R_PPC64_REL14_BRTAKEN:
6469 case R_PPC64_REL14_BRNTAKEN:
6470 case R_PPC64_REL24:
6471 if (h != NULL
6472 && (h == &htab->tls_get_addr->elf
6473 || h == &htab->tls_get_addr_fd->elf))
6474 {
6475 if (!expecting_tls_get_addr
6476 && rel != relstart
6477 && ((ELF64_R_TYPE (rel[-1].r_info)
6478 == R_PPC64_TOC16)
6479 || (ELF64_R_TYPE (rel[-1].r_info)
6480 == R_PPC64_TOC16_LO)))
6481 {
6482 /* Check for toc tls entries. */
6483 char *toc_tls;
6484 int retval;
6485
6486 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6487 rel - 1, ibfd);
6488 if (retval == 0)
6489 goto err_free_rel;
6490 if (toc_tls != NULL)
6491 expecting_tls_get_addr = retval > 1;
6492 }
6493
6494 if (expecting_tls_get_addr)
6495 {
6496 struct plt_entry *ent;
6497 for (ent = h->plt.plist; ent; ent = ent->next)
6498 if (ent->addend == 0)
6499 {
6500 if (ent->plt.refcount > 0)
6501 ent->plt.refcount -= 1;
6502 break;
6503 }
6504 }
6505 }
6506 expecting_tls_get_addr = 0;
6507 continue;
6508
6509 case R_PPC64_TPREL64:
6510 expecting_tls_get_addr = 0;
6511 if (ok_tprel)
6512 {
6513 /* IE -> LE */
6514 tls_set = TLS_EXPLICIT;
6515 tls_clear = TLS_TPREL;
6516 break;
6517 }
6518 else
6519 continue;
6520
6521 case R_PPC64_DTPMOD64:
6522 expecting_tls_get_addr = 0;
6523 if (rel + 1 < relend
6524 && (rel[1].r_info
6525 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6526 && rel[1].r_offset == rel->r_offset + 8)
6527 {
6528 if (ok_tprel)
6529 /* GD -> LE */
6530 tls_set = TLS_EXPLICIT | TLS_GD;
6531 else
6532 /* GD -> IE */
6533 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6534 tls_clear = TLS_GD;
6535 }
6536 else
6537 {
6538 if (!is_local)
6539 continue;
6540
6541 /* LD -> LE */
6542 tls_set = TLS_EXPLICIT;
6543 tls_clear = TLS_LD;
6544 }
6545 break;
6546
6547 default:
6548 expecting_tls_get_addr = 0;
6549 continue;
6550 }
6551
6552 if ((tls_set & TLS_EXPLICIT) == 0)
6553 {
6554 struct got_entry *ent;
6555
6556 /* Adjust got entry for this reloc. */
6557 if (h != NULL)
6558 ent = h->got.glist;
6559 else
6560 ent = elf_local_got_ents (ibfd)[r_symndx];
6561
6562 for (; ent != NULL; ent = ent->next)
6563 if (ent->addend == rel->r_addend
6564 && ent->owner == ibfd
6565 && ent->tls_type == tls_type)
6566 break;
6567 if (ent == NULL)
6568 abort ();
6569
6570 if (tls_set == 0)
6571 {
6572 /* We managed to get rid of a got entry. */
6573 if (ent->got.refcount > 0)
6574 ent->got.refcount -= 1;
6575 }
6576 }
6577 else if (h != NULL)
6578 {
6579 struct ppc_link_hash_entry * eh;
6580 struct ppc_dyn_relocs **pp;
6581 struct ppc_dyn_relocs *p;
6582
6583 /* Adjust dynamic relocs. */
6584 eh = (struct ppc_link_hash_entry *) h;
6585 for (pp = &eh->dyn_relocs;
6586 (p = *pp) != NULL;
6587 pp = &p->next)
6588 if (p->sec == sec)
6589 {
6590 /* If we got rid of a DTPMOD/DTPREL reloc
6591 pair then we'll lose one or two dyn
6592 relocs. */
6593 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6594 p->count -= 1;
6595 p->count -= 1;
6596 if (p->count == 0)
6597 *pp = p->next;
6598 break;
6599 }
6600 }
6601
6602 *tls_mask |= tls_set;
6603 *tls_mask &= ~tls_clear;
6604 }
6605
6606 if (elf_section_data (sec)->relocs != relstart)
6607 free (relstart);
6608 }
6609
6610 if (locsyms != NULL
6611 && (elf_tdata (ibfd)->symtab_hdr.contents
6612 != (unsigned char *) locsyms))
6613 {
6614 if (!info->keep_memory)
6615 free (locsyms);
6616 else
6617 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6618 }
6619 }
6620 return TRUE;
6621 }
6622
6623 /* Allocate space in .plt, .got and associated reloc sections for
6624 dynamic relocs. */
6625
6626 static bfd_boolean
6627 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6628 {
6629 struct bfd_link_info *info;
6630 struct ppc_link_hash_table *htab;
6631 asection *s;
6632 struct ppc_link_hash_entry *eh;
6633 struct ppc_dyn_relocs *p;
6634 struct got_entry *gent;
6635
6636 if (h->root.type == bfd_link_hash_indirect)
6637 return TRUE;
6638
6639 if (h->root.type == bfd_link_hash_warning)
6640 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6641
6642 info = (struct bfd_link_info *) inf;
6643 htab = ppc_hash_table (info);
6644
6645 if (htab->elf.dynamic_sections_created
6646 && h->dynindx != -1
6647 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
6648 {
6649 struct plt_entry *pent;
6650 bfd_boolean doneone = FALSE;
6651 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
6652 if (pent->plt.refcount > 0)
6653 {
6654 /* If this is the first .plt entry, make room for the special
6655 first entry. */
6656 s = htab->plt;
6657 if (s->size == 0)
6658 s->size += PLT_INITIAL_ENTRY_SIZE;
6659
6660 pent->plt.offset = s->size;
6661
6662 /* Make room for this entry. */
6663 s->size += PLT_ENTRY_SIZE;
6664
6665 /* Make room for the .glink code. */
6666 s = htab->glink;
6667 if (s->size == 0)
6668 s->size += GLINK_CALL_STUB_SIZE;
6669 /* We need bigger stubs past index 32767. */
6670 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
6671 s->size += 4;
6672 s->size += 2*4;
6673
6674 /* We also need to make an entry in the .rela.plt section. */
6675 s = htab->relplt;
6676 s->size += sizeof (Elf64_External_Rela);
6677 doneone = TRUE;
6678 }
6679 else
6680 pent->plt.offset = (bfd_vma) -1;
6681 if (!doneone)
6682 {
6683 h->plt.plist = NULL;
6684 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6685 }
6686 }
6687 else
6688 {
6689 h->plt.plist = NULL;
6690 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6691 }
6692
6693 eh = (struct ppc_link_hash_entry *) h;
6694 /* Run through the TLS GD got entries first if we're changing them
6695 to TPREL. */
6696 if ((eh->tls_mask & TLS_TPRELGD) != 0)
6697 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6698 if (gent->got.refcount > 0
6699 && (gent->tls_type & TLS_GD) != 0)
6700 {
6701 /* This was a GD entry that has been converted to TPREL. If
6702 there happens to be a TPREL entry we can use that one. */
6703 struct got_entry *ent;
6704 for (ent = h->got.glist; ent != NULL; ent = ent->next)
6705 if (ent->got.refcount > 0
6706 && (ent->tls_type & TLS_TPREL) != 0
6707 && ent->addend == gent->addend
6708 && ent->owner == gent->owner)
6709 {
6710 gent->got.refcount = 0;
6711 break;
6712 }
6713
6714 /* If not, then we'll be using our own TPREL entry. */
6715 if (gent->got.refcount != 0)
6716 gent->tls_type = TLS_TLS | TLS_TPREL;
6717 }
6718
6719 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6720 if (gent->got.refcount > 0)
6721 {
6722 bfd_boolean dyn;
6723
6724 /* Make sure this symbol is output as a dynamic symbol.
6725 Undefined weak syms won't yet be marked as dynamic,
6726 nor will all TLS symbols. */
6727 if (h->dynindx == -1
6728 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6729 {
6730 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6731 return FALSE;
6732 }
6733
6734 if ((gent->tls_type & TLS_LD) != 0
6735 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6736 {
6737 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
6738 continue;
6739 }
6740
6741 s = ppc64_elf_tdata (gent->owner)->got;
6742 gent->got.offset = s->size;
6743 s->size
6744 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
6745 dyn = htab->elf.dynamic_sections_created;
6746 if ((info->shared
6747 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
6748 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6749 || h->root.type != bfd_link_hash_undefweak))
6750 ppc64_elf_tdata (gent->owner)->relgot->size
6751 += (gent->tls_type & eh->tls_mask & TLS_GD
6752 ? 2 * sizeof (Elf64_External_Rela)
6753 : sizeof (Elf64_External_Rela));
6754 }
6755 else
6756 gent->got.offset = (bfd_vma) -1;
6757
6758 if (eh->dyn_relocs == NULL)
6759 return TRUE;
6760
6761 /* In the shared -Bsymbolic case, discard space allocated for
6762 dynamic pc-relative relocs against symbols which turn out to be
6763 defined in regular objects. For the normal shared case, discard
6764 space for relocs that have become local due to symbol visibility
6765 changes. */
6766
6767 if (info->shared)
6768 {
6769 /* Relocs that use pc_count are those that appear on a call insn,
6770 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
6771 generated via assembly. We want calls to protected symbols to
6772 resolve directly to the function rather than going via the plt.
6773 If people want function pointer comparisons to work as expected
6774 then they should avoid writing weird assembly. */
6775 if (SYMBOL_CALLS_LOCAL (info, h))
6776 {
6777 struct ppc_dyn_relocs **pp;
6778
6779 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6780 {
6781 p->count -= p->pc_count;
6782 p->pc_count = 0;
6783 if (p->count == 0)
6784 *pp = p->next;
6785 else
6786 pp = &p->next;
6787 }
6788 }
6789
6790 /* Also discard relocs on undefined weak syms with non-default
6791 visibility. */
6792 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6793 && h->root.type == bfd_link_hash_undefweak)
6794 eh->dyn_relocs = NULL;
6795 }
6796 else if (ELIMINATE_COPY_RELOCS)
6797 {
6798 /* For the non-shared case, discard space for relocs against
6799 symbols which turn out to need copy relocs or are not
6800 dynamic. */
6801
6802 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
6803 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
6804 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
6805 {
6806 /* Make sure this symbol is output as a dynamic symbol.
6807 Undefined weak syms won't yet be marked as dynamic. */
6808 if (h->dynindx == -1
6809 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6810 {
6811 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6812 return FALSE;
6813 }
6814
6815 /* If that succeeded, we know we'll be keeping all the
6816 relocs. */
6817 if (h->dynindx != -1)
6818 goto keep;
6819 }
6820
6821 eh->dyn_relocs = NULL;
6822
6823 keep: ;
6824 }
6825
6826 /* Finally, allocate space. */
6827 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6828 {
6829 asection *sreloc = elf_section_data (p->sec)->sreloc;
6830 sreloc->size += p->count * sizeof (Elf64_External_Rela);
6831 }
6832
6833 return TRUE;
6834 }
6835
6836 /* Find any dynamic relocs that apply to read-only sections. */
6837
6838 static bfd_boolean
6839 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6840 {
6841 struct ppc_link_hash_entry *eh;
6842 struct ppc_dyn_relocs *p;
6843
6844 if (h->root.type == bfd_link_hash_warning)
6845 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6846
6847 eh = (struct ppc_link_hash_entry *) h;
6848 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6849 {
6850 asection *s = p->sec->output_section;
6851
6852 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6853 {
6854 struct bfd_link_info *info = inf;
6855
6856 info->flags |= DF_TEXTREL;
6857
6858 /* Not an error, just cut short the traversal. */
6859 return FALSE;
6860 }
6861 }
6862 return TRUE;
6863 }
6864
6865 /* Set the sizes of the dynamic sections. */
6866
6867 static bfd_boolean
6868 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6869 struct bfd_link_info *info)
6870 {
6871 struct ppc_link_hash_table *htab;
6872 bfd *dynobj;
6873 asection *s;
6874 bfd_boolean relocs;
6875 bfd *ibfd;
6876
6877 htab = ppc_hash_table (info);
6878 dynobj = htab->elf.dynobj;
6879 if (dynobj == NULL)
6880 abort ();
6881
6882 if (htab->elf.dynamic_sections_created)
6883 {
6884 /* Set the contents of the .interp section to the interpreter. */
6885 if (info->executable)
6886 {
6887 s = bfd_get_section_by_name (dynobj, ".interp");
6888 if (s == NULL)
6889 abort ();
6890 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6891 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6892 }
6893 }
6894
6895 /* Set up .got offsets for local syms, and space for local dynamic
6896 relocs. */
6897 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6898 {
6899 struct got_entry **lgot_ents;
6900 struct got_entry **end_lgot_ents;
6901 char *lgot_masks;
6902 bfd_size_type locsymcount;
6903 Elf_Internal_Shdr *symtab_hdr;
6904 asection *srel;
6905
6906 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
6907 continue;
6908
6909 if (ppc64_tlsld_got (ibfd)->refcount > 0)
6910 {
6911 s = ppc64_elf_tdata (ibfd)->got;
6912 ppc64_tlsld_got (ibfd)->offset = s->size;
6913 s->size += 16;
6914 if (info->shared)
6915 {
6916 srel = ppc64_elf_tdata (ibfd)->relgot;
6917 srel->size += sizeof (Elf64_External_Rela);
6918 }
6919 }
6920 else
6921 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
6922
6923 for (s = ibfd->sections; s != NULL; s = s->next)
6924 {
6925 struct ppc_dyn_relocs *p;
6926
6927 for (p = *((struct ppc_dyn_relocs **)
6928 &elf_section_data (s)->local_dynrel);
6929 p != NULL;
6930 p = p->next)
6931 {
6932 if (!bfd_is_abs_section (p->sec)
6933 && bfd_is_abs_section (p->sec->output_section))
6934 {
6935 /* Input section has been discarded, either because
6936 it is a copy of a linkonce section or due to
6937 linker script /DISCARD/, so we'll be discarding
6938 the relocs too. */
6939 }
6940 else if (p->count != 0)
6941 {
6942 srel = elf_section_data (p->sec)->sreloc;
6943 srel->size += p->count * sizeof (Elf64_External_Rela);
6944 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
6945 info->flags |= DF_TEXTREL;
6946 }
6947 }
6948 }
6949
6950 lgot_ents = elf_local_got_ents (ibfd);
6951 if (!lgot_ents)
6952 continue;
6953
6954 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6955 locsymcount = symtab_hdr->sh_info;
6956 end_lgot_ents = lgot_ents + locsymcount;
6957 lgot_masks = (char *) end_lgot_ents;
6958 s = ppc64_elf_tdata (ibfd)->got;
6959 srel = ppc64_elf_tdata (ibfd)->relgot;
6960 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
6961 {
6962 struct got_entry *ent;
6963
6964 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
6965 if (ent->got.refcount > 0)
6966 {
6967 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
6968 {
6969 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
6970 {
6971 ppc64_tlsld_got (ibfd)->offset = s->size;
6972 s->size += 16;
6973 if (info->shared)
6974 srel->size += sizeof (Elf64_External_Rela);
6975 }
6976 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
6977 }
6978 else
6979 {
6980 ent->got.offset = s->size;
6981 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
6982 {
6983 s->size += 16;
6984 if (info->shared)
6985 srel->size += 2 * sizeof (Elf64_External_Rela);
6986 }
6987 else
6988 {
6989 s->size += 8;
6990 if (info->shared)
6991 srel->size += sizeof (Elf64_External_Rela);
6992 }
6993 }
6994 }
6995 else
6996 ent->got.offset = (bfd_vma) -1;
6997 }
6998 }
6999
7000 /* Allocate global sym .plt and .got entries, and space for global
7001 sym dynamic relocs. */
7002 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7003
7004 /* We now have determined the sizes of the various dynamic sections.
7005 Allocate memory for them. */
7006 relocs = FALSE;
7007 for (s = dynobj->sections; s != NULL; s = s->next)
7008 {
7009 if ((s->flags & SEC_LINKER_CREATED) == 0)
7010 continue;
7011
7012 if (s == htab->brlt || s == htab->relbrlt)
7013 /* These haven't been allocated yet; don't strip. */
7014 continue;
7015 else if (s == htab->got
7016 || s == htab->plt
7017 || s == htab->glink)
7018 {
7019 /* Strip this section if we don't need it; see the
7020 comment below. */
7021 }
7022 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7023 {
7024 if (s->size == 0)
7025 {
7026 /* If we don't need this section, strip it from the
7027 output file. This is mostly to handle .rela.bss and
7028 .rela.plt. We must create both sections in
7029 create_dynamic_sections, because they must be created
7030 before the linker maps input sections to output
7031 sections. The linker does that before
7032 adjust_dynamic_symbol is called, and it is that
7033 function which decides whether anything needs to go
7034 into these sections. */
7035 }
7036 else
7037 {
7038 if (s != htab->relplt)
7039 relocs = TRUE;
7040
7041 /* We use the reloc_count field as a counter if we need
7042 to copy relocs into the output file. */
7043 s->reloc_count = 0;
7044 }
7045 }
7046 else
7047 {
7048 /* It's not one of our sections, so don't allocate space. */
7049 continue;
7050 }
7051
7052 if (s->size == 0)
7053 {
7054 _bfd_strip_section_from_output (info, s);
7055 continue;
7056 }
7057
7058 /* .plt is in the bss section. We don't initialise it. */
7059 if (s == htab->plt)
7060 continue;
7061
7062 /* Allocate memory for the section contents. We use bfd_zalloc
7063 here in case unused entries are not reclaimed before the
7064 section's contents are written out. This should not happen,
7065 but this way if it does we get a R_PPC64_NONE reloc in .rela
7066 sections instead of garbage.
7067 We also rely on the section contents being zero when writing
7068 the GOT. */
7069 s->contents = bfd_zalloc (dynobj, s->size);
7070 if (s->contents == NULL)
7071 return FALSE;
7072 }
7073
7074 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7075 {
7076 s = ppc64_elf_tdata (ibfd)->got;
7077 if (s != NULL && s != htab->got)
7078 {
7079 if (s->size == 0)
7080 _bfd_strip_section_from_output (info, s);
7081 else
7082 {
7083 s->contents = bfd_zalloc (ibfd, s->size);
7084 if (s->contents == NULL)
7085 return FALSE;
7086 }
7087 }
7088 s = ppc64_elf_tdata (ibfd)->relgot;
7089 if (s != NULL)
7090 {
7091 if (s->size == 0)
7092 _bfd_strip_section_from_output (info, s);
7093 else
7094 {
7095 s->contents = bfd_zalloc (ibfd, s->size);
7096 if (s->contents == NULL)
7097 return FALSE;
7098 relocs = TRUE;
7099 s->reloc_count = 0;
7100 }
7101 }
7102 }
7103
7104 if (htab->elf.dynamic_sections_created)
7105 {
7106 /* Add some entries to the .dynamic section. We fill in the
7107 values later, in ppc64_elf_finish_dynamic_sections, but we
7108 must add the entries now so that we get the correct size for
7109 the .dynamic section. The DT_DEBUG entry is filled in by the
7110 dynamic linker and used by the debugger. */
7111 #define add_dynamic_entry(TAG, VAL) \
7112 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7113
7114 if (info->executable)
7115 {
7116 if (!add_dynamic_entry (DT_DEBUG, 0))
7117 return FALSE;
7118 }
7119
7120 if (htab->plt != NULL && htab->plt->size != 0)
7121 {
7122 if (!add_dynamic_entry (DT_PLTGOT, 0)
7123 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7124 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7125 || !add_dynamic_entry (DT_JMPREL, 0)
7126 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7127 return FALSE;
7128 }
7129
7130 if (NO_OPD_RELOCS)
7131 {
7132 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7133 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7134 return FALSE;
7135 }
7136
7137 if (relocs)
7138 {
7139 if (!add_dynamic_entry (DT_RELA, 0)
7140 || !add_dynamic_entry (DT_RELASZ, 0)
7141 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7142 return FALSE;
7143
7144 /* If any dynamic relocs apply to a read-only section,
7145 then we need a DT_TEXTREL entry. */
7146 if ((info->flags & DF_TEXTREL) == 0)
7147 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7148
7149 if ((info->flags & DF_TEXTREL) != 0)
7150 {
7151 if (!add_dynamic_entry (DT_TEXTREL, 0))
7152 return FALSE;
7153 }
7154 }
7155 }
7156 #undef add_dynamic_entry
7157
7158 return TRUE;
7159 }
7160
7161 /* Determine the type of stub needed, if any, for a call. */
7162
7163 static inline enum ppc_stub_type
7164 ppc_type_of_stub (asection *input_sec,
7165 const Elf_Internal_Rela *rel,
7166 struct ppc_link_hash_entry **hash,
7167 bfd_vma destination)
7168 {
7169 struct ppc_link_hash_entry *h = *hash;
7170 bfd_vma location;
7171 bfd_vma branch_offset;
7172 bfd_vma max_branch_offset;
7173 enum elf_ppc64_reloc_type r_type;
7174
7175 if (h != NULL)
7176 {
7177 if (h->oh != NULL
7178 && h->oh->is_func_descriptor)
7179 h = h->oh;
7180
7181 if (h->elf.dynindx != -1)
7182 {
7183 struct plt_entry *ent;
7184
7185 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7186 if (ent->addend == rel->r_addend
7187 && ent->plt.offset != (bfd_vma) -1)
7188 {
7189 *hash = h;
7190 return ppc_stub_plt_call;
7191 }
7192 }
7193
7194 if (!(h->elf.root.type == bfd_link_hash_defined
7195 || h->elf.root.type == bfd_link_hash_defweak)
7196 || h->elf.root.u.def.section->output_section == NULL)
7197 return ppc_stub_none;
7198 }
7199
7200 /* Determine where the call point is. */
7201 location = (input_sec->output_offset
7202 + input_sec->output_section->vma
7203 + rel->r_offset);
7204
7205 branch_offset = destination - location;
7206 r_type = ELF64_R_TYPE (rel->r_info);
7207
7208 /* Determine if a long branch stub is needed. */
7209 max_branch_offset = 1 << 25;
7210 if (r_type != R_PPC64_REL24)
7211 max_branch_offset = 1 << 15;
7212
7213 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7214 /* We need a stub. Figure out whether a long_branch or plt_branch
7215 is needed later. */
7216 return ppc_stub_long_branch;
7217
7218 return ppc_stub_none;
7219 }
7220
7221 /* Build a .plt call stub. */
7222
7223 static inline bfd_byte *
7224 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7225 {
7226 #define PPC_LO(v) ((v) & 0xffff)
7227 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7228 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7229
7230 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7231 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7232 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7233 if (PPC_HA (offset + 8) != PPC_HA (offset))
7234 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7235 offset += 8;
7236 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7237 if (PPC_HA (offset + 8) != PPC_HA (offset))
7238 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7239 offset += 8;
7240 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7241 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7242 bfd_put_32 (obfd, BCTR, p), p += 4;
7243 return p;
7244 }
7245
7246 static bfd_boolean
7247 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7248 {
7249 struct ppc_stub_hash_entry *stub_entry;
7250 struct ppc_branch_hash_entry *br_entry;
7251 struct bfd_link_info *info;
7252 struct ppc_link_hash_table *htab;
7253 bfd_byte *loc;
7254 bfd_byte *p;
7255 unsigned int indx;
7256 struct plt_entry *ent;
7257 bfd_vma off;
7258 int size;
7259
7260 /* Massage our args to the form they really have. */
7261 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7262 info = in_arg;
7263
7264 htab = ppc_hash_table (info);
7265
7266 /* Make a note of the offset within the stubs for this entry. */
7267 stub_entry->stub_offset = stub_entry->stub_sec->size;
7268 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7269
7270 htab->stub_count[stub_entry->stub_type - 1] += 1;
7271 switch (stub_entry->stub_type)
7272 {
7273 case ppc_stub_long_branch:
7274 case ppc_stub_long_branch_r2off:
7275 /* Branches are relative. This is where we are going to. */
7276 off = (stub_entry->target_value
7277 + stub_entry->target_section->output_offset
7278 + stub_entry->target_section->output_section->vma);
7279
7280 /* And this is where we are coming from. */
7281 off -= (stub_entry->stub_offset
7282 + stub_entry->stub_sec->output_offset
7283 + stub_entry->stub_sec->output_section->vma);
7284
7285 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7286 size = 4;
7287 else
7288 {
7289 bfd_vma r2off;
7290
7291 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7292 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7293 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7294 loc += 4;
7295 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7296 loc += 4;
7297 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7298 loc += 4;
7299 off -= 12;
7300 size = 16;
7301 }
7302 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7303
7304 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7305 break;
7306
7307 case ppc_stub_plt_branch:
7308 case ppc_stub_plt_branch_r2off:
7309 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7310 stub_entry->root.string + 9,
7311 FALSE, FALSE);
7312 if (br_entry == NULL)
7313 {
7314 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7315 stub_entry->root.string + 9);
7316 htab->stub_error = TRUE;
7317 return FALSE;
7318 }
7319
7320 off = (stub_entry->target_value
7321 + stub_entry->target_section->output_offset
7322 + stub_entry->target_section->output_section->vma);
7323
7324 bfd_put_64 (htab->brlt->owner, off,
7325 htab->brlt->contents + br_entry->offset);
7326
7327 if (info->shared)
7328 {
7329 /* Create a reloc for the branch lookup table entry. */
7330 Elf_Internal_Rela rela;
7331 bfd_byte *rl;
7332
7333 rela.r_offset = (br_entry->offset
7334 + htab->brlt->output_offset
7335 + htab->brlt->output_section->vma);
7336 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7337 rela.r_addend = off;
7338
7339 rl = htab->relbrlt->contents;
7340 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7341 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7342 }
7343
7344 off = (br_entry->offset
7345 + htab->brlt->output_offset
7346 + htab->brlt->output_section->vma
7347 - elf_gp (htab->brlt->output_section->owner)
7348 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7349
7350 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7351 {
7352 (*_bfd_error_handler)
7353 (_("linkage table error against `%s'"),
7354 stub_entry->root.string);
7355 bfd_set_error (bfd_error_bad_value);
7356 htab->stub_error = TRUE;
7357 return FALSE;
7358 }
7359
7360 indx = off;
7361 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7362 {
7363 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7364 loc += 4;
7365 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7366 size = 16;
7367 }
7368 else
7369 {
7370 bfd_vma r2off;
7371
7372 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7373 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7374 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7375 loc += 4;
7376 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7377 loc += 4;
7378 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7379 loc += 4;
7380 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7381 loc += 4;
7382 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7383 size = 28;
7384 }
7385 loc += 4;
7386 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7387 loc += 4;
7388 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7389 break;
7390
7391 case ppc_stub_plt_call:
7392 /* Do the best we can for shared libraries built without
7393 exporting ".foo" for each "foo". This can happen when symbol
7394 versioning scripts strip all bar a subset of symbols. */
7395 if (stub_entry->h->oh != NULL
7396 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7397 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7398 {
7399 /* Point the symbol at the stub. There may be multiple stubs,
7400 we don't really care; The main thing is to make this sym
7401 defined somewhere. Maybe defining the symbol in the stub
7402 section is a silly idea. If we didn't do this, htab->top_id
7403 could disappear. */
7404 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7405 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7406 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7407 }
7408
7409 /* Now build the stub. */
7410 off = (bfd_vma) -1;
7411 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7412 if (ent->addend == stub_entry->addend)
7413 {
7414 off = ent->plt.offset;
7415 break;
7416 }
7417 if (off >= (bfd_vma) -2)
7418 abort ();
7419
7420 off &= ~ (bfd_vma) 1;
7421 off += (htab->plt->output_offset
7422 + htab->plt->output_section->vma
7423 - elf_gp (htab->plt->output_section->owner)
7424 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7425
7426 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7427 {
7428 (*_bfd_error_handler)
7429 (_("linkage table error against `%s'"),
7430 stub_entry->h->elf.root.root.string);
7431 bfd_set_error (bfd_error_bad_value);
7432 htab->stub_error = TRUE;
7433 return FALSE;
7434 }
7435
7436 p = build_plt_stub (htab->stub_bfd, loc, off);
7437 size = p - loc;
7438 break;
7439
7440 default:
7441 BFD_FAIL ();
7442 return FALSE;
7443 }
7444
7445 stub_entry->stub_sec->size += size;
7446
7447 if (htab->emit_stub_syms
7448 && !(stub_entry->stub_type == ppc_stub_plt_call
7449 && stub_entry->h->oh != NULL
7450 && stub_entry->h->oh->elf.root.type == bfd_link_hash_defined
7451 && stub_entry->h->oh->elf.root.u.def.section == stub_entry->stub_sec
7452 && stub_entry->h->oh->elf.root.u.def.value == stub_entry->stub_offset))
7453 {
7454 struct elf_link_hash_entry *h;
7455 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
7456 TRUE, FALSE, FALSE);
7457 if (h == NULL)
7458 return FALSE;
7459 if (h->root.type == bfd_link_hash_new)
7460 {
7461 h->root.type = bfd_link_hash_defined;
7462 h->root.u.def.section = stub_entry->stub_sec;
7463 h->root.u.def.value = stub_entry->stub_offset;
7464 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7465 | ELF_LINK_HASH_DEF_REGULAR
7466 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7467 | ELF_LINK_FORCED_LOCAL);
7468 }
7469 }
7470
7471 return TRUE;
7472 }
7473
7474 /* As above, but don't actually build the stub. Just bump offset so
7475 we know stub section sizes, and select plt_branch stubs where
7476 long_branch stubs won't do. */
7477
7478 static bfd_boolean
7479 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7480 {
7481 struct ppc_stub_hash_entry *stub_entry;
7482 struct bfd_link_info *info;
7483 struct ppc_link_hash_table *htab;
7484 bfd_vma off;
7485 int size;
7486
7487 /* Massage our args to the form they really have. */
7488 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7489 info = in_arg;
7490
7491 htab = ppc_hash_table (info);
7492
7493 if (stub_entry->stub_type == ppc_stub_plt_call)
7494 {
7495 struct plt_entry *ent;
7496 off = (bfd_vma) -1;
7497 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7498 if (ent->addend == stub_entry->addend)
7499 {
7500 off = ent->plt.offset & ~(bfd_vma) 1;
7501 break;
7502 }
7503 if (off >= (bfd_vma) -2)
7504 abort ();
7505 off += (htab->plt->output_offset
7506 + htab->plt->output_section->vma
7507 - elf_gp (htab->plt->output_section->owner)
7508 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7509
7510 size = PLT_CALL_STUB_SIZE;
7511 if (PPC_HA (off + 16) != PPC_HA (off))
7512 size += 4;
7513 }
7514 else
7515 {
7516 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
7517 variants. */
7518 off = (stub_entry->target_value
7519 + stub_entry->target_section->output_offset
7520 + stub_entry->target_section->output_section->vma);
7521 off -= (stub_entry->stub_sec->size
7522 + stub_entry->stub_sec->output_offset
7523 + stub_entry->stub_sec->output_section->vma);
7524
7525 /* Reset the stub type from the plt variant in case we now
7526 can reach with a shorter stub. */
7527 if (stub_entry->stub_type >= ppc_stub_plt_branch)
7528 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
7529
7530 size = 4;
7531 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
7532 {
7533 off -= 12;
7534 size = 16;
7535 }
7536
7537 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
7538 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
7539 {
7540 struct ppc_branch_hash_entry *br_entry;
7541
7542 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7543 stub_entry->root.string + 9,
7544 TRUE, FALSE);
7545 if (br_entry == NULL)
7546 {
7547 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
7548 stub_entry->root.string + 9);
7549 htab->stub_error = TRUE;
7550 return FALSE;
7551 }
7552
7553 if (br_entry->iter != htab->stub_iteration)
7554 {
7555 br_entry->iter = htab->stub_iteration;
7556 br_entry->offset = htab->brlt->size;
7557 htab->brlt->size += 8;
7558
7559 if (info->shared)
7560 htab->relbrlt->size += sizeof (Elf64_External_Rela);
7561 }
7562
7563 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
7564 size = 16;
7565 if (stub_entry->stub_type != ppc_stub_plt_branch)
7566 size = 28;
7567 }
7568 }
7569
7570 stub_entry->stub_sec->size += size;
7571 return TRUE;
7572 }
7573
7574 /* Set up various things so that we can make a list of input sections
7575 for each output section included in the link. Returns -1 on error,
7576 0 when no stubs will be needed, and 1 on success. */
7577
7578 int
7579 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
7580 {
7581 bfd *input_bfd;
7582 int top_id, top_index, id;
7583 asection *section;
7584 asection **input_list;
7585 bfd_size_type amt;
7586 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7587
7588 if (htab->brlt == NULL)
7589 return 0;
7590
7591 /* Find the top input section id. */
7592 for (input_bfd = info->input_bfds, top_id = 3;
7593 input_bfd != NULL;
7594 input_bfd = input_bfd->link_next)
7595 {
7596 for (section = input_bfd->sections;
7597 section != NULL;
7598 section = section->next)
7599 {
7600 if (top_id < section->id)
7601 top_id = section->id;
7602 }
7603 }
7604
7605 htab->top_id = top_id;
7606 amt = sizeof (struct map_stub) * (top_id + 1);
7607 htab->stub_group = bfd_zmalloc (amt);
7608 if (htab->stub_group == NULL)
7609 return -1;
7610
7611 /* Set toc_off for com, und, abs and ind sections. */
7612 for (id = 0; id < 3; id++)
7613 htab->stub_group[id].toc_off = TOC_BASE_OFF;
7614
7615 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
7616
7617 /* We can't use output_bfd->section_count here to find the top output
7618 section index as some sections may have been removed, and
7619 _bfd_strip_section_from_output doesn't renumber the indices. */
7620 for (section = output_bfd->sections, top_index = 0;
7621 section != NULL;
7622 section = section->next)
7623 {
7624 if (top_index < section->index)
7625 top_index = section->index;
7626 }
7627
7628 htab->top_index = top_index;
7629 amt = sizeof (asection *) * (top_index + 1);
7630 input_list = bfd_zmalloc (amt);
7631 htab->input_list = input_list;
7632 if (input_list == NULL)
7633 return -1;
7634
7635 return 1;
7636 }
7637
7638 /* The linker repeatedly calls this function for each TOC input section
7639 and linker generated GOT section. Group input bfds such that the toc
7640 within a group is less than 64k in size. Will break with cute linker
7641 scripts that play games with dot in the output toc section. */
7642
7643 void
7644 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
7645 {
7646 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7647 bfd_vma addr = isec->output_offset + isec->output_section->vma;
7648 bfd_vma off = addr - htab->toc_curr;
7649
7650 if (off + isec->size > 0x10000)
7651 htab->toc_curr = addr;
7652
7653 elf_gp (isec->owner) = (htab->toc_curr
7654 - elf_gp (isec->output_section->owner)
7655 + TOC_BASE_OFF);
7656 }
7657
7658 /* Called after the last call to the above function. */
7659
7660 void
7661 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
7662 struct bfd_link_info *info)
7663 {
7664 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7665
7666 /* toc_curr tracks the TOC offset used for code sections below in
7667 ppc64_elf_next_input_section. Start off at 0x8000. */
7668 htab->toc_curr = TOC_BASE_OFF;
7669 }
7670
7671 /* No toc references were found in ISEC. If the code in ISEC makes no
7672 calls, then there's no need to use toc adjusting stubs when branching
7673 into ISEC. Actually, indirect calls from ISEC are OK as they will
7674 load r2. */
7675
7676 static int
7677 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
7678 {
7679 bfd_byte *contents;
7680 bfd_size_type i;
7681 int ret;
7682 int branch_ok;
7683
7684 /* We know none of our code bearing sections will need toc stubs. */
7685 if ((isec->flags & SEC_LINKER_CREATED) != 0)
7686 return 0;
7687
7688 if (isec->size == 0)
7689 return 0;
7690
7691 /* Hack for linux kernel. .fixup contains branches, but only back to
7692 the function that hit an exception. */
7693 branch_ok = strcmp (isec->name, ".fixup") == 0;
7694
7695 contents = elf_section_data (isec)->this_hdr.contents;
7696 if (contents == NULL)
7697 {
7698 if (!bfd_malloc_and_get_section (isec->owner, isec, &contents))
7699 {
7700 if (contents != NULL)
7701 free (contents);
7702 return -1;
7703 }
7704 if (info->keep_memory)
7705 elf_section_data (isec)->this_hdr.contents = contents;
7706 }
7707
7708 /* Code scan, because we don't necessarily have relocs on calls to
7709 static functions. */
7710 ret = 0;
7711 for (i = 0; i < isec->size; i += 4)
7712 {
7713 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
7714 /* Is this a branch? */
7715 if ((insn & (0x3f << 26)) == (18 << 26)
7716 /* If branch and link, it's a function call. */
7717 && ((insn & 1) != 0
7718 /* Sibling calls use a plain branch. I don't know a way
7719 of deciding whether a branch is really a sibling call. */
7720 || !branch_ok))
7721 {
7722 ret = 1;
7723 break;
7724 }
7725 }
7726
7727 if (elf_section_data (isec)->this_hdr.contents != contents)
7728 free (contents);
7729 return ret;
7730 }
7731
7732 /* The linker repeatedly calls this function for each input section,
7733 in the order that input sections are linked into output sections.
7734 Build lists of input sections to determine groupings between which
7735 we may insert linker stubs. */
7736
7737 bfd_boolean
7738 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
7739 {
7740 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7741 int ret;
7742
7743 if ((isec->output_section->flags & SEC_CODE) != 0
7744 && isec->output_section->index <= htab->top_index)
7745 {
7746 asection **list = htab->input_list + isec->output_section->index;
7747 /* Steal the link_sec pointer for our list. */
7748 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
7749 /* This happens to make the list in reverse order,
7750 which is what we want. */
7751 PREV_SEC (isec) = *list;
7752 *list = isec;
7753 }
7754
7755 /* If a code section has a function that uses the TOC then we need
7756 to use the right TOC (obviously). Also, make sure that .opd gets
7757 the correct TOC value for R_PPC64_TOC relocs that don't have or
7758 can't find their function symbol (shouldn't ever happen now). */
7759 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
7760 {
7761 if (elf_gp (isec->owner) != 0)
7762 htab->toc_curr = elf_gp (isec->owner);
7763 }
7764 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
7765 return FALSE;
7766 else
7767 isec->has_gp_reloc = ret;
7768
7769 /* Functions that don't use the TOC can belong in any TOC group.
7770 Use the last TOC base. This happens to make _init and _fini
7771 pasting work. */
7772 htab->stub_group[isec->id].toc_off = htab->toc_curr;
7773 return TRUE;
7774 }
7775
7776 /* See whether we can group stub sections together. Grouping stub
7777 sections may result in fewer stubs. More importantly, we need to
7778 put all .init* and .fini* stubs at the beginning of the .init or
7779 .fini output sections respectively, because glibc splits the
7780 _init and _fini functions into multiple parts. Putting a stub in
7781 the middle of a function is not a good idea. */
7782
7783 static void
7784 group_sections (struct ppc_link_hash_table *htab,
7785 bfd_size_type stub_group_size,
7786 bfd_boolean stubs_always_before_branch)
7787 {
7788 asection **list = htab->input_list + htab->top_index;
7789 do
7790 {
7791 asection *tail = *list;
7792 while (tail != NULL)
7793 {
7794 asection *curr;
7795 asection *prev;
7796 bfd_size_type total;
7797 bfd_boolean big_sec;
7798 bfd_vma curr_toc;
7799
7800 curr = tail;
7801 total = tail->size;
7802 big_sec = total >= stub_group_size;
7803 curr_toc = htab->stub_group[tail->id].toc_off;
7804
7805 while ((prev = PREV_SEC (curr)) != NULL
7806 && ((total += curr->output_offset - prev->output_offset)
7807 < stub_group_size)
7808 && htab->stub_group[prev->id].toc_off == curr_toc)
7809 curr = prev;
7810
7811 /* OK, the size from the start of CURR to the end is less
7812 than stub_group_size and thus can be handled by one stub
7813 section. (or the tail section is itself larger than
7814 stub_group_size, in which case we may be toast.) We
7815 should really be keeping track of the total size of stubs
7816 added here, as stubs contribute to the final output
7817 section size. That's a little tricky, and this way will
7818 only break if stubs added make the total size more than
7819 2^25, ie. for the default stub_group_size, if stubs total
7820 more than 2097152 bytes, or nearly 75000 plt call stubs. */
7821 do
7822 {
7823 prev = PREV_SEC (tail);
7824 /* Set up this stub group. */
7825 htab->stub_group[tail->id].link_sec = curr;
7826 }
7827 while (tail != curr && (tail = prev) != NULL);
7828
7829 /* But wait, there's more! Input sections up to stub_group_size
7830 bytes before the stub section can be handled by it too.
7831 Don't do this if we have a really large section after the
7832 stubs, as adding more stubs increases the chance that
7833 branches may not reach into the stub section. */
7834 if (!stubs_always_before_branch && !big_sec)
7835 {
7836 total = 0;
7837 while (prev != NULL
7838 && ((total += tail->output_offset - prev->output_offset)
7839 < stub_group_size)
7840 && htab->stub_group[prev->id].toc_off == curr_toc)
7841 {
7842 tail = prev;
7843 prev = PREV_SEC (tail);
7844 htab->stub_group[tail->id].link_sec = curr;
7845 }
7846 }
7847 tail = prev;
7848 }
7849 }
7850 while (list-- != htab->input_list);
7851 free (htab->input_list);
7852 #undef PREV_SEC
7853 }
7854
7855 /* Determine and set the size of the stub section for a final link.
7856
7857 The basic idea here is to examine all the relocations looking for
7858 PC-relative calls to a target that is unreachable with a "bl"
7859 instruction. */
7860
7861 bfd_boolean
7862 ppc64_elf_size_stubs (bfd *output_bfd,
7863 struct bfd_link_info *info,
7864 bfd_signed_vma group_size,
7865 asection *(*add_stub_section) (const char *, asection *),
7866 void (*layout_sections_again) (void))
7867 {
7868 bfd_size_type stub_group_size;
7869 bfd_boolean stubs_always_before_branch;
7870 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7871
7872 /* Stash our params away. */
7873 htab->add_stub_section = add_stub_section;
7874 htab->layout_sections_again = layout_sections_again;
7875 stubs_always_before_branch = group_size < 0;
7876 if (group_size < 0)
7877 stub_group_size = -group_size;
7878 else
7879 stub_group_size = group_size;
7880 if (stub_group_size == 1)
7881 {
7882 /* Default values. */
7883 if (stubs_always_before_branch)
7884 {
7885 stub_group_size = 0x1e00000;
7886 if (htab->has_14bit_branch)
7887 stub_group_size = 0x7800;
7888 }
7889 else
7890 {
7891 stub_group_size = 0x1c00000;
7892 if (htab->has_14bit_branch)
7893 stub_group_size = 0x7000;
7894 }
7895 }
7896
7897 group_sections (htab, stub_group_size, stubs_always_before_branch);
7898
7899 while (1)
7900 {
7901 bfd *input_bfd;
7902 unsigned int bfd_indx;
7903 asection *stub_sec;
7904 bfd_boolean stub_changed;
7905
7906 htab->stub_iteration += 1;
7907 stub_changed = FALSE;
7908
7909 for (input_bfd = info->input_bfds, bfd_indx = 0;
7910 input_bfd != NULL;
7911 input_bfd = input_bfd->link_next, bfd_indx++)
7912 {
7913 Elf_Internal_Shdr *symtab_hdr;
7914 asection *section;
7915 Elf_Internal_Sym *local_syms = NULL;
7916
7917 /* We'll need the symbol table in a second. */
7918 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7919 if (symtab_hdr->sh_info == 0)
7920 continue;
7921
7922 /* Walk over each section attached to the input bfd. */
7923 for (section = input_bfd->sections;
7924 section != NULL;
7925 section = section->next)
7926 {
7927 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
7928
7929 /* If there aren't any relocs, then there's nothing more
7930 to do. */
7931 if ((section->flags & SEC_RELOC) == 0
7932 || section->reloc_count == 0)
7933 continue;
7934
7935 /* If this section is a link-once section that will be
7936 discarded, then don't create any stubs. */
7937 if (section->output_section == NULL
7938 || section->output_section->owner != output_bfd)
7939 continue;
7940
7941 /* Get the relocs. */
7942 internal_relocs
7943 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
7944 info->keep_memory);
7945 if (internal_relocs == NULL)
7946 goto error_ret_free_local;
7947
7948 /* Now examine each relocation. */
7949 irela = internal_relocs;
7950 irelaend = irela + section->reloc_count;
7951 for (; irela < irelaend; irela++)
7952 {
7953 enum elf_ppc64_reloc_type r_type;
7954 unsigned int r_indx;
7955 enum ppc_stub_type stub_type;
7956 struct ppc_stub_hash_entry *stub_entry;
7957 asection *sym_sec, *code_sec;
7958 bfd_vma sym_value;
7959 bfd_vma destination;
7960 bfd_boolean ok_dest;
7961 struct ppc_link_hash_entry *hash;
7962 struct ppc_link_hash_entry *fdh;
7963 struct elf_link_hash_entry *h;
7964 Elf_Internal_Sym *sym;
7965 char *stub_name;
7966 const asection *id_sec;
7967 long *opd_adjust;
7968
7969 r_type = ELF64_R_TYPE (irela->r_info);
7970 r_indx = ELF64_R_SYM (irela->r_info);
7971
7972 if (r_type >= R_PPC64_max)
7973 {
7974 bfd_set_error (bfd_error_bad_value);
7975 goto error_ret_free_internal;
7976 }
7977
7978 /* Only look for stubs on branch instructions. */
7979 if (r_type != R_PPC64_REL24
7980 && r_type != R_PPC64_REL14
7981 && r_type != R_PPC64_REL14_BRTAKEN
7982 && r_type != R_PPC64_REL14_BRNTAKEN)
7983 continue;
7984
7985 /* Now determine the call target, its name, value,
7986 section. */
7987 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7988 r_indx, input_bfd))
7989 goto error_ret_free_internal;
7990 hash = (struct ppc_link_hash_entry *) h;
7991
7992 ok_dest = FALSE;
7993 fdh = NULL;
7994 if (hash == NULL)
7995 {
7996 sym_value = sym->st_value;
7997 ok_dest = TRUE;
7998 }
7999 else
8000 {
8001 sym_value = 0;
8002 /* Recognise an old ABI func code entry sym, and
8003 use the func descriptor sym instead. */
8004 if (hash->elf.root.type == bfd_link_hash_undefweak
8005 && hash->elf.root.root.string[0] == '.'
8006 && (fdh = get_fdh (hash, htab)) != NULL)
8007 {
8008 if (fdh->elf.root.type == bfd_link_hash_defined
8009 || fdh->elf.root.type == bfd_link_hash_defweak)
8010 {
8011 sym_sec = fdh->elf.root.u.def.section;
8012 sym_value = fdh->elf.root.u.def.value;
8013 if (sym_sec->output_section != NULL)
8014 ok_dest = TRUE;
8015 }
8016 else
8017 fdh = NULL;
8018 }
8019 else if (hash->elf.root.type == bfd_link_hash_defined
8020 || hash->elf.root.type == bfd_link_hash_defweak)
8021 {
8022 sym_value = hash->elf.root.u.def.value;
8023 if (sym_sec->output_section != NULL)
8024 ok_dest = TRUE;
8025 }
8026 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8027 ;
8028 else if (hash->elf.root.type == bfd_link_hash_undefined)
8029 ;
8030 else
8031 {
8032 bfd_set_error (bfd_error_bad_value);
8033 goto error_ret_free_internal;
8034 }
8035 }
8036
8037 destination = 0;
8038 if (ok_dest)
8039 {
8040 sym_value += irela->r_addend;
8041 destination = (sym_value
8042 + sym_sec->output_offset
8043 + sym_sec->output_section->vma);
8044 }
8045
8046 code_sec = sym_sec;
8047 opd_adjust = get_opd_info (sym_sec);
8048 if (opd_adjust != NULL)
8049 {
8050 bfd_vma dest;
8051
8052 if (hash == NULL)
8053 {
8054 long adjust = opd_adjust[sym_value / 8];
8055 if (adjust == -1)
8056 continue;
8057 sym_value += adjust;
8058 }
8059 dest = opd_entry_value (sym_sec, sym_value,
8060 &code_sec, &sym_value);
8061 if (dest != (bfd_vma) -1)
8062 {
8063 destination = dest;
8064 if (fdh != NULL)
8065 {
8066 /* Fixup old ABI sym to point at code
8067 entry. */
8068 hash->elf.root.type = bfd_link_hash_defweak;
8069 hash->elf.root.u.def.section = code_sec;
8070 hash->elf.root.u.def.value = sym_value;
8071 }
8072 }
8073 }
8074
8075 /* Determine what (if any) linker stub is needed. */
8076 stub_type = ppc_type_of_stub (section, irela, &hash,
8077 destination);
8078
8079 if (stub_type != ppc_stub_plt_call)
8080 {
8081 /* Check whether we need a TOC adjusting stub.
8082 Since the linker pastes together pieces from
8083 different object files when creating the
8084 _init and _fini functions, it may be that a
8085 call to what looks like a local sym is in
8086 fact a call needing a TOC adjustment. */
8087 if (code_sec != NULL
8088 && code_sec->output_section != NULL
8089 && (htab->stub_group[code_sec->id].toc_off
8090 != htab->stub_group[section->id].toc_off)
8091 && code_sec->has_gp_reloc
8092 && section->has_gp_reloc)
8093 stub_type = ppc_stub_long_branch_r2off;
8094 }
8095
8096 if (stub_type == ppc_stub_none)
8097 continue;
8098
8099 /* __tls_get_addr calls might be eliminated. */
8100 if (stub_type != ppc_stub_plt_call
8101 && hash != NULL
8102 && (hash == htab->tls_get_addr
8103 || hash == htab->tls_get_addr_fd)
8104 && section->has_tls_reloc
8105 && irela != internal_relocs)
8106 {
8107 /* Get tls info. */
8108 char *tls_mask;
8109
8110 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8111 irela - 1, input_bfd))
8112 goto error_ret_free_internal;
8113 if (*tls_mask != 0)
8114 continue;
8115 }
8116
8117 /* Support for grouping stub sections. */
8118 id_sec = htab->stub_group[section->id].link_sec;
8119
8120 /* Get the name of this stub. */
8121 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8122 if (!stub_name)
8123 goto error_ret_free_internal;
8124
8125 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8126 stub_name, FALSE, FALSE);
8127 if (stub_entry != NULL)
8128 {
8129 /* The proper stub has already been created. */
8130 free (stub_name);
8131 continue;
8132 }
8133
8134 stub_entry = ppc_add_stub (stub_name, section, htab);
8135 if (stub_entry == NULL)
8136 {
8137 free (stub_name);
8138 error_ret_free_internal:
8139 if (elf_section_data (section)->relocs == NULL)
8140 free (internal_relocs);
8141 error_ret_free_local:
8142 if (local_syms != NULL
8143 && (symtab_hdr->contents
8144 != (unsigned char *) local_syms))
8145 free (local_syms);
8146 return FALSE;
8147 }
8148
8149 stub_entry->stub_type = stub_type;
8150 stub_entry->target_value = sym_value;
8151 stub_entry->target_section = code_sec;
8152 stub_entry->h = hash;
8153 stub_entry->addend = irela->r_addend;
8154 stub_changed = TRUE;
8155 }
8156
8157 /* We're done with the internal relocs, free them. */
8158 if (elf_section_data (section)->relocs != internal_relocs)
8159 free (internal_relocs);
8160 }
8161
8162 if (local_syms != NULL
8163 && symtab_hdr->contents != (unsigned char *) local_syms)
8164 {
8165 if (!info->keep_memory)
8166 free (local_syms);
8167 else
8168 symtab_hdr->contents = (unsigned char *) local_syms;
8169 }
8170 }
8171
8172 if (!stub_changed)
8173 break;
8174
8175 /* OK, we've added some stubs. Find out the new size of the
8176 stub sections. */
8177 for (stub_sec = htab->stub_bfd->sections;
8178 stub_sec != NULL;
8179 stub_sec = stub_sec->next)
8180 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8181 stub_sec->size = 0;
8182
8183 htab->brlt->size = 0;
8184 if (info->shared)
8185 htab->relbrlt->size = 0;
8186
8187 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8188
8189 /* Ask the linker to do its stuff. */
8190 (*htab->layout_sections_again) ();
8191 }
8192
8193 /* It would be nice to strip .branch_lt from the output if the
8194 section is empty, but it's too late. If we strip sections here,
8195 the dynamic symbol table is corrupted since the section symbol
8196 for the stripped section isn't written. */
8197
8198 return TRUE;
8199 }
8200
8201 /* Called after we have determined section placement. If sections
8202 move, we'll be called again. Provide a value for TOCstart. */
8203
8204 bfd_vma
8205 ppc64_elf_toc (bfd *obfd)
8206 {
8207 asection *s;
8208 bfd_vma TOCstart;
8209
8210 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8211 order. The TOC starts where the first of these sections starts. */
8212 s = bfd_get_section_by_name (obfd, ".got");
8213 if (s == NULL)
8214 s = bfd_get_section_by_name (obfd, ".toc");
8215 if (s == NULL)
8216 s = bfd_get_section_by_name (obfd, ".tocbss");
8217 if (s == NULL)
8218 s = bfd_get_section_by_name (obfd, ".plt");
8219 if (s == NULL)
8220 {
8221 /* This may happen for
8222 o references to TOC base (SYM@toc / TOC[tc0]) without a
8223 .toc directive
8224 o bad linker script
8225 o --gc-sections and empty TOC sections
8226
8227 FIXME: Warn user? */
8228
8229 /* Look for a likely section. We probably won't even be
8230 using TOCstart. */
8231 for (s = obfd->sections; s != NULL; s = s->next)
8232 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8233 == (SEC_ALLOC | SEC_SMALL_DATA))
8234 break;
8235 if (s == NULL)
8236 for (s = obfd->sections; s != NULL; s = s->next)
8237 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8238 == (SEC_ALLOC | SEC_SMALL_DATA))
8239 break;
8240 if (s == NULL)
8241 for (s = obfd->sections; s != NULL; s = s->next)
8242 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8243 break;
8244 if (s == NULL)
8245 for (s = obfd->sections; s != NULL; s = s->next)
8246 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8247 break;
8248 }
8249
8250 TOCstart = 0;
8251 if (s != NULL)
8252 TOCstart = s->output_section->vma + s->output_offset;
8253
8254 return TOCstart;
8255 }
8256
8257 /* Build all the stubs associated with the current output file.
8258 The stubs are kept in a hash table attached to the main linker
8259 hash table. This function is called via gldelf64ppc_finish. */
8260
8261 bfd_boolean
8262 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8263 struct bfd_link_info *info,
8264 char **stats)
8265 {
8266 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8267 asection *stub_sec;
8268 bfd_byte *p;
8269 int stub_sec_count = 0;
8270
8271 htab->emit_stub_syms = emit_stub_syms;
8272
8273 /* Allocate memory to hold the linker stubs. */
8274 for (stub_sec = htab->stub_bfd->sections;
8275 stub_sec != NULL;
8276 stub_sec = stub_sec->next)
8277 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
8278 && stub_sec->size != 0)
8279 {
8280 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
8281 if (stub_sec->contents == NULL)
8282 return FALSE;
8283 /* We want to check that built size is the same as calculated
8284 size. rawsize is a convenient location to use. */
8285 stub_sec->rawsize = stub_sec->size;
8286 stub_sec->size = 0;
8287 }
8288
8289 if (htab->plt != NULL)
8290 {
8291 unsigned int indx;
8292 bfd_vma plt0;
8293
8294 /* Build the .glink plt call stub. */
8295 plt0 = (htab->plt->output_section->vma
8296 + htab->plt->output_offset
8297 - (htab->glink->output_section->vma
8298 + htab->glink->output_offset
8299 + GLINK_CALL_STUB_SIZE));
8300 if (plt0 + 0x80008000 > 0xffffffff)
8301 {
8302 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
8303 bfd_set_error (bfd_error_bad_value);
8304 return FALSE;
8305 }
8306
8307 if (htab->emit_stub_syms)
8308 {
8309 struct elf_link_hash_entry *h;
8310 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
8311 if (h == NULL)
8312 return FALSE;
8313 if (h->root.type == bfd_link_hash_new)
8314 {
8315 h->root.type = bfd_link_hash_defined;
8316 h->root.u.def.section = htab->glink;
8317 h->root.u.def.value = 0;
8318 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
8319 | ELF_LINK_HASH_DEF_REGULAR
8320 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
8321 | ELF_LINK_FORCED_LOCAL);
8322 }
8323 }
8324 p = htab->glink->contents;
8325 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
8326 p += 4;
8327 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
8328 p += 4;
8329 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
8330 p += 4;
8331 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8332 p += 4;
8333 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
8334 p += 4;
8335 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
8336 p += 4;
8337 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
8338 p += 4;
8339 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8340 p += 4;
8341 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
8342 p += 4;
8343 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
8344 p += 4;
8345 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
8346 p += 4;
8347 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
8348 p += 4;
8349 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
8350 p += 4;
8351 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
8352 p += 4;
8353 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
8354 p += 4;
8355 bfd_put_32 (htab->glink->owner, BCTR, p);
8356 p += 4;
8357
8358 /* Build the .glink lazy link call stubs. */
8359 indx = 0;
8360 while (p < htab->glink->contents + htab->glink->size)
8361 {
8362 if (indx < 0x8000)
8363 {
8364 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
8365 p += 4;
8366 }
8367 else
8368 {
8369 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
8370 p += 4;
8371 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
8372 p += 4;
8373 }
8374 bfd_put_32 (htab->glink->owner,
8375 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
8376 indx++;
8377 p += 4;
8378 }
8379 htab->glink->rawsize = p - htab->glink->contents;
8380 }
8381
8382 if (htab->brlt->size != 0)
8383 {
8384 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
8385 htab->brlt->size);
8386 if (htab->brlt->contents == NULL)
8387 return FALSE;
8388 }
8389 if (info->shared && htab->relbrlt->size != 0)
8390 {
8391 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
8392 htab->relbrlt->size);
8393 if (htab->relbrlt->contents == NULL)
8394 return FALSE;
8395 }
8396
8397 /* Build the stubs as directed by the stub hash table. */
8398 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
8399
8400 for (stub_sec = htab->stub_bfd->sections;
8401 stub_sec != NULL;
8402 stub_sec = stub_sec->next)
8403 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8404 {
8405 stub_sec_count += 1;
8406 if (stub_sec->rawsize != stub_sec->size)
8407 break;
8408 }
8409
8410 if (stub_sec != NULL
8411 || htab->glink->rawsize != htab->glink->size)
8412 {
8413 htab->stub_error = TRUE;
8414 (*_bfd_error_handler) (_("stubs don't match calculated size"));
8415 }
8416
8417 if (htab->stub_error)
8418 return FALSE;
8419
8420 if (stats != NULL)
8421 {
8422 *stats = bfd_malloc (500);
8423 if (*stats == NULL)
8424 return FALSE;
8425
8426 sprintf (*stats, _("linker stubs in %u groups\n"
8427 " branch %lu\n"
8428 " toc adjust %lu\n"
8429 " long branch %lu\n"
8430 " long toc adj %lu\n"
8431 " plt call %lu"),
8432 stub_sec_count,
8433 htab->stub_count[ppc_stub_long_branch - 1],
8434 htab->stub_count[ppc_stub_long_branch_r2off - 1],
8435 htab->stub_count[ppc_stub_plt_branch - 1],
8436 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
8437 htab->stub_count[ppc_stub_plt_call - 1]);
8438 }
8439 return TRUE;
8440 }
8441
8442 /* This function undoes the changes made by add_symbol_adjust. */
8443
8444 static bfd_boolean
8445 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
8446 {
8447 struct ppc_link_hash_entry *eh;
8448
8449 if (h->root.type == bfd_link_hash_indirect)
8450 return TRUE;
8451
8452 if (h->root.type == bfd_link_hash_warning)
8453 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8454
8455 eh = (struct ppc_link_hash_entry *) h;
8456 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
8457 return TRUE;
8458
8459 eh->elf.root.type = bfd_link_hash_undefined;
8460 return TRUE;
8461 }
8462
8463 void
8464 ppc64_elf_restore_symbols (struct bfd_link_info *info)
8465 {
8466 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8467 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
8468 }
8469
8470 /* The RELOCATE_SECTION function is called by the ELF backend linker
8471 to handle the relocations for a section.
8472
8473 The relocs are always passed as Rela structures; if the section
8474 actually uses Rel structures, the r_addend field will always be
8475 zero.
8476
8477 This function is responsible for adjust the section contents as
8478 necessary, and (if using Rela relocs and generating a
8479 relocatable output file) adjusting the reloc addend as
8480 necessary.
8481
8482 This function does not have to worry about setting the reloc
8483 address or the reloc symbol index.
8484
8485 LOCAL_SYMS is a pointer to the swapped in local symbols.
8486
8487 LOCAL_SECTIONS is an array giving the section in the input file
8488 corresponding to the st_shndx field of each local symbol.
8489
8490 The global hash table entry for the global symbols can be found
8491 via elf_sym_hashes (input_bfd).
8492
8493 When generating relocatable output, this function must handle
8494 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8495 going to be the section symbol corresponding to the output
8496 section, which means that the addend must be adjusted
8497 accordingly. */
8498
8499 static bfd_boolean
8500 ppc64_elf_relocate_section (bfd *output_bfd,
8501 struct bfd_link_info *info,
8502 bfd *input_bfd,
8503 asection *input_section,
8504 bfd_byte *contents,
8505 Elf_Internal_Rela *relocs,
8506 Elf_Internal_Sym *local_syms,
8507 asection **local_sections)
8508 {
8509 struct ppc_link_hash_table *htab;
8510 Elf_Internal_Shdr *symtab_hdr;
8511 struct elf_link_hash_entry **sym_hashes;
8512 Elf_Internal_Rela *rel;
8513 Elf_Internal_Rela *relend;
8514 Elf_Internal_Rela outrel;
8515 bfd_byte *loc;
8516 struct got_entry **local_got_ents;
8517 bfd_vma TOCstart;
8518 bfd_boolean ret = TRUE;
8519 bfd_boolean is_opd;
8520 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
8521 bfd_boolean is_power4 = FALSE;
8522
8523 if (info->relocatable)
8524 return TRUE;
8525
8526 /* Initialize howto table if needed. */
8527 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8528 ppc_howto_init ();
8529
8530 htab = ppc_hash_table (info);
8531 local_got_ents = elf_local_got_ents (input_bfd);
8532 TOCstart = elf_gp (output_bfd);
8533 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8534 sym_hashes = elf_sym_hashes (input_bfd);
8535 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
8536
8537 rel = relocs;
8538 relend = relocs + input_section->reloc_count;
8539 for (; rel < relend; rel++)
8540 {
8541 enum elf_ppc64_reloc_type r_type;
8542 bfd_vma addend;
8543 bfd_reloc_status_type r;
8544 Elf_Internal_Sym *sym;
8545 asection *sec;
8546 struct elf_link_hash_entry *h_elf;
8547 struct ppc_link_hash_entry *h;
8548 struct ppc_link_hash_entry *fdh;
8549 const char *sym_name;
8550 unsigned long r_symndx, toc_symndx;
8551 char tls_mask, tls_gd, tls_type;
8552 char sym_type;
8553 bfd_vma relocation;
8554 bfd_boolean unresolved_reloc;
8555 bfd_boolean warned;
8556 unsigned long insn, mask;
8557 struct ppc_stub_hash_entry *stub_entry;
8558 bfd_vma max_br_offset;
8559 bfd_vma from;
8560
8561 r_type = ELF64_R_TYPE (rel->r_info);
8562 r_symndx = ELF64_R_SYM (rel->r_info);
8563
8564 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
8565 symbol of the previous ADDR64 reloc. The symbol gives us the
8566 proper TOC base to use. */
8567 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
8568 && rel != relocs
8569 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
8570 && is_opd)
8571 r_symndx = ELF64_R_SYM (rel[-1].r_info);
8572
8573 sym = NULL;
8574 sec = NULL;
8575 h_elf = NULL;
8576 sym_name = NULL;
8577 unresolved_reloc = FALSE;
8578 warned = FALSE;
8579
8580 if (r_symndx < symtab_hdr->sh_info)
8581 {
8582 /* It's a local symbol. */
8583 long *opd_adjust;
8584
8585 sym = local_syms + r_symndx;
8586 sec = local_sections[r_symndx];
8587 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
8588 sym_type = ELF64_ST_TYPE (sym->st_info);
8589 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8590 opd_adjust = get_opd_info (sec);
8591 if (opd_adjust != NULL)
8592 {
8593 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
8594 if (adjust == -1)
8595 relocation = 0;
8596 else
8597 relocation += adjust;
8598 }
8599 }
8600 else
8601 {
8602 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8603 r_symndx, symtab_hdr, sym_hashes,
8604 h_elf, sec, relocation,
8605 unresolved_reloc, warned);
8606 sym_name = h_elf->root.root.string;
8607 sym_type = h_elf->type;
8608 }
8609 h = (struct ppc_link_hash_entry *) h_elf;
8610
8611 /* TLS optimizations. Replace instruction sequences and relocs
8612 based on information we collected in tls_optimize. We edit
8613 RELOCS so that --emit-relocs will output something sensible
8614 for the final instruction stream. */
8615 tls_mask = 0;
8616 tls_gd = 0;
8617 toc_symndx = 0;
8618 if (IS_PPC64_TLS_RELOC (r_type))
8619 {
8620 if (h != NULL)
8621 tls_mask = h->tls_mask;
8622 else if (local_got_ents != NULL)
8623 {
8624 char *lgot_masks;
8625 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
8626 tls_mask = lgot_masks[r_symndx];
8627 }
8628 if (tls_mask == 0 && r_type == R_PPC64_TLS)
8629 {
8630 /* Check for toc tls entries. */
8631 char *toc_tls;
8632
8633 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8634 rel, input_bfd))
8635 return FALSE;
8636
8637 if (toc_tls)
8638 tls_mask = *toc_tls;
8639 }
8640 }
8641
8642 /* Check that tls relocs are used with tls syms, and non-tls
8643 relocs are used with non-tls syms. */
8644 if (r_symndx != 0
8645 && r_type != R_PPC64_NONE
8646 && (h == NULL
8647 || h->elf.root.type == bfd_link_hash_defined
8648 || h->elf.root.type == bfd_link_hash_defweak)
8649 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
8650 {
8651 if (r_type == R_PPC64_TLS && tls_mask != 0)
8652 /* R_PPC64_TLS is OK against a symbol in the TOC. */
8653 ;
8654 else
8655 (*_bfd_error_handler)
8656 (sym_type == STT_TLS
8657 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
8658 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
8659 input_bfd,
8660 input_section,
8661 (long) rel->r_offset,
8662 ppc64_elf_howto_table[r_type]->name,
8663 sym_name);
8664 }
8665
8666 /* Ensure reloc mapping code below stays sane. */
8667 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
8668 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
8669 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
8670 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
8671 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
8672 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
8673 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
8674 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
8675 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
8676 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
8677 abort ();
8678
8679 switch (r_type)
8680 {
8681 default:
8682 break;
8683
8684 case R_PPC64_TOC16:
8685 case R_PPC64_TOC16_LO:
8686 case R_PPC64_TOC16_DS:
8687 case R_PPC64_TOC16_LO_DS:
8688 {
8689 /* Check for toc tls entries. */
8690 char *toc_tls;
8691 int retval;
8692
8693 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8694 rel, input_bfd);
8695 if (retval == 0)
8696 return FALSE;
8697
8698 if (toc_tls)
8699 {
8700 tls_mask = *toc_tls;
8701 if (r_type == R_PPC64_TOC16_DS
8702 || r_type == R_PPC64_TOC16_LO_DS)
8703 {
8704 if (tls_mask != 0
8705 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
8706 goto toctprel;
8707 }
8708 else
8709 {
8710 /* If we found a GD reloc pair, then we might be
8711 doing a GD->IE transition. */
8712 if (retval == 2)
8713 {
8714 tls_gd = TLS_TPRELGD;
8715 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8716 goto tls_get_addr_check;
8717 }
8718 else if (retval == 3)
8719 {
8720 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8721 goto tls_get_addr_check;
8722 }
8723 }
8724 }
8725 }
8726 break;
8727
8728 case R_PPC64_GOT_TPREL16_DS:
8729 case R_PPC64_GOT_TPREL16_LO_DS:
8730 if (tls_mask != 0
8731 && (tls_mask & TLS_TPREL) == 0)
8732 {
8733 toctprel:
8734 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
8735 insn &= 31 << 21;
8736 insn |= 0x3c0d0000; /* addis 0,13,0 */
8737 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
8738 r_type = R_PPC64_TPREL16_HA;
8739 if (toc_symndx != 0)
8740 {
8741 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8742 /* We changed the symbol. Start over in order to
8743 get h, sym, sec etc. right. */
8744 rel--;
8745 continue;
8746 }
8747 else
8748 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8749 }
8750 break;
8751
8752 case R_PPC64_TLS:
8753 if (tls_mask != 0
8754 && (tls_mask & TLS_TPREL) == 0)
8755 {
8756 bfd_vma rtra;
8757 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8758 if ((insn & ((0x3f << 26) | (31 << 11)))
8759 == ((31 << 26) | (13 << 11)))
8760 rtra = insn & ((1 << 26) - (1 << 16));
8761 else if ((insn & ((0x3f << 26) | (31 << 16)))
8762 == ((31 << 26) | (13 << 16)))
8763 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
8764 else
8765 abort ();
8766 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
8767 /* add -> addi. */
8768 insn = 14 << 26;
8769 else if ((insn & (31 << 1)) == 23 << 1
8770 && ((insn & (31 << 6)) < 14 << 6
8771 || ((insn & (31 << 6)) >= 16 << 6
8772 && (insn & (31 << 6)) < 24 << 6)))
8773 /* load and store indexed -> dform. */
8774 insn = (32 | ((insn >> 6) & 31)) << 26;
8775 else if ((insn & (31 << 1)) == 21 << 1
8776 && (insn & (0x1a << 6)) == 0)
8777 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
8778 insn = (((58 | ((insn >> 6) & 4)) << 26)
8779 | ((insn >> 6) & 1));
8780 else if ((insn & (31 << 1)) == 21 << 1
8781 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
8782 /* lwax -> lwa. */
8783 insn = (58 << 26) | 2;
8784 else
8785 abort ();
8786 insn |= rtra;
8787 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8788 /* Was PPC64_TLS which sits on insn boundary, now
8789 PPC64_TPREL16_LO which is at insn+2. */
8790 rel->r_offset += 2;
8791 r_type = R_PPC64_TPREL16_LO;
8792 if (toc_symndx != 0)
8793 {
8794 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8795 /* We changed the symbol. Start over in order to
8796 get h, sym, sec etc. right. */
8797 rel--;
8798 continue;
8799 }
8800 else
8801 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8802 }
8803 break;
8804
8805 case R_PPC64_GOT_TLSGD16_HI:
8806 case R_PPC64_GOT_TLSGD16_HA:
8807 tls_gd = TLS_TPRELGD;
8808 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8809 goto tls_gdld_hi;
8810 break;
8811
8812 case R_PPC64_GOT_TLSLD16_HI:
8813 case R_PPC64_GOT_TLSLD16_HA:
8814 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8815 {
8816 tls_gdld_hi:
8817 if ((tls_mask & tls_gd) != 0)
8818 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8819 + R_PPC64_GOT_TPREL16_DS);
8820 else
8821 {
8822 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
8823 rel->r_offset -= 2;
8824 r_type = R_PPC64_NONE;
8825 }
8826 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8827 }
8828 break;
8829
8830 case R_PPC64_GOT_TLSGD16:
8831 case R_PPC64_GOT_TLSGD16_LO:
8832 tls_gd = TLS_TPRELGD;
8833 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8834 goto tls_get_addr_check;
8835 break;
8836
8837 case R_PPC64_GOT_TLSLD16:
8838 case R_PPC64_GOT_TLSLD16_LO:
8839 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8840 {
8841 tls_get_addr_check:
8842 if (rel + 1 < relend)
8843 {
8844 enum elf_ppc64_reloc_type r_type2;
8845 unsigned long r_symndx2;
8846 struct elf_link_hash_entry *h2;
8847 bfd_vma insn1, insn2, insn3;
8848 bfd_vma offset;
8849
8850 /* The next instruction should be a call to
8851 __tls_get_addr. Peek at the reloc to be sure. */
8852 r_type2 = ELF64_R_TYPE (rel[1].r_info);
8853 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
8854 if (r_symndx2 < symtab_hdr->sh_info
8855 || (r_type2 != R_PPC64_REL14
8856 && r_type2 != R_PPC64_REL14_BRTAKEN
8857 && r_type2 != R_PPC64_REL14_BRNTAKEN
8858 && r_type2 != R_PPC64_REL24))
8859 break;
8860
8861 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
8862 while (h2->root.type == bfd_link_hash_indirect
8863 || h2->root.type == bfd_link_hash_warning)
8864 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
8865 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
8866 && h2 != &htab->tls_get_addr_fd->elf))
8867 break;
8868
8869 /* OK, it checks out. Replace the call. */
8870 offset = rel[1].r_offset;
8871 insn1 = bfd_get_32 (output_bfd,
8872 contents + rel->r_offset - 2);
8873 insn3 = bfd_get_32 (output_bfd,
8874 contents + offset + 4);
8875 if ((tls_mask & tls_gd) != 0)
8876 {
8877 /* IE */
8878 insn1 &= (1 << 26) - (1 << 2);
8879 insn1 |= 58 << 26; /* ld */
8880 insn2 = 0x7c636a14; /* add 3,3,13 */
8881 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
8882 if ((tls_mask & TLS_EXPLICIT) == 0)
8883 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8884 + R_PPC64_GOT_TPREL16_DS);
8885 else
8886 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
8887 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8888 }
8889 else
8890 {
8891 /* LE */
8892 insn1 = 0x3c6d0000; /* addis 3,13,0 */
8893 insn2 = 0x38630000; /* addi 3,3,0 */
8894 if (tls_gd == 0)
8895 {
8896 /* Was an LD reloc. */
8897 r_symndx = 0;
8898 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8899 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8900 }
8901 else if (toc_symndx != 0)
8902 r_symndx = toc_symndx;
8903 r_type = R_PPC64_TPREL16_HA;
8904 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8905 rel[1].r_info = ELF64_R_INFO (r_symndx,
8906 R_PPC64_TPREL16_LO);
8907 rel[1].r_offset += 2;
8908 }
8909 if (insn3 == NOP
8910 || insn3 == CROR_151515 || insn3 == CROR_313131)
8911 {
8912 insn3 = insn2;
8913 insn2 = NOP;
8914 rel[1].r_offset += 4;
8915 }
8916 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
8917 bfd_put_32 (output_bfd, insn2, contents + offset);
8918 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
8919 if (tls_gd == 0 || toc_symndx != 0)
8920 {
8921 /* We changed the symbol. Start over in order
8922 to get h, sym, sec etc. right. */
8923 rel--;
8924 continue;
8925 }
8926 }
8927 }
8928 break;
8929
8930 case R_PPC64_DTPMOD64:
8931 if (rel + 1 < relend
8932 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
8933 && rel[1].r_offset == rel->r_offset + 8)
8934 {
8935 if ((tls_mask & TLS_GD) == 0)
8936 {
8937 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
8938 if ((tls_mask & TLS_TPRELGD) != 0)
8939 r_type = R_PPC64_TPREL64;
8940 else
8941 {
8942 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8943 r_type = R_PPC64_NONE;
8944 }
8945 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8946 }
8947 }
8948 else
8949 {
8950 if ((tls_mask & TLS_LD) == 0)
8951 {
8952 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8953 r_type = R_PPC64_NONE;
8954 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8955 }
8956 }
8957 break;
8958
8959 case R_PPC64_TPREL64:
8960 if ((tls_mask & TLS_TPREL) == 0)
8961 {
8962 r_type = R_PPC64_NONE;
8963 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8964 }
8965 break;
8966 }
8967
8968 /* Handle other relocations that tweak non-addend part of insn. */
8969 insn = 0;
8970 max_br_offset = 1 << 25;
8971 addend = rel->r_addend;
8972 switch (r_type)
8973 {
8974 default:
8975 break;
8976
8977 /* Branch taken prediction relocations. */
8978 case R_PPC64_ADDR14_BRTAKEN:
8979 case R_PPC64_REL14_BRTAKEN:
8980 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
8981 /* Fall thru. */
8982
8983 /* Branch not taken prediction relocations. */
8984 case R_PPC64_ADDR14_BRNTAKEN:
8985 case R_PPC64_REL14_BRNTAKEN:
8986 insn |= bfd_get_32 (output_bfd,
8987 contents + rel->r_offset) & ~(0x01 << 21);
8988 /* Fall thru. */
8989
8990 case R_PPC64_REL14:
8991 max_br_offset = 1 << 15;
8992 /* Fall thru. */
8993
8994 case R_PPC64_REL24:
8995 /* Calls to functions with a different TOC, such as calls to
8996 shared objects, need to alter the TOC pointer. This is
8997 done using a linkage stub. A REL24 branching to these
8998 linkage stubs needs to be followed by a nop, as the nop
8999 will be replaced with an instruction to restore the TOC
9000 base pointer. */
9001 stub_entry = NULL;
9002 fdh = h;
9003 if (((h != NULL
9004 && (((fdh = h->oh) != NULL
9005 && fdh->elf.plt.plist != NULL)
9006 || (fdh = h)->elf.plt.plist != NULL))
9007 || (sec != NULL
9008 && sec->output_section != NULL
9009 && sec->id <= htab->top_id
9010 && (htab->stub_group[sec->id].toc_off
9011 != htab->stub_group[input_section->id].toc_off)))
9012 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9013 rel, htab)) != NULL
9014 && (stub_entry->stub_type == ppc_stub_plt_call
9015 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9016 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9017 {
9018 bfd_boolean can_plt_call = FALSE;
9019
9020 if (rel->r_offset + 8 <= input_section->size)
9021 {
9022 unsigned long nop;
9023 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9024 if (nop == NOP
9025 || nop == CROR_151515 || nop == CROR_313131)
9026 {
9027 bfd_put_32 (input_bfd, LD_R2_40R1,
9028 contents + rel->r_offset + 4);
9029 can_plt_call = TRUE;
9030 }
9031 }
9032
9033 if (!can_plt_call)
9034 {
9035 if (stub_entry->stub_type == ppc_stub_plt_call)
9036 {
9037 /* If this is a plain branch rather than a branch
9038 and link, don't require a nop. */
9039 unsigned long br;
9040 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9041 if ((br & 1) == 0)
9042 can_plt_call = TRUE;
9043 }
9044 else if (h != NULL
9045 && strcmp (h->elf.root.root.string,
9046 ".__libc_start_main") == 0)
9047 {
9048 /* Allow crt1 branch to go via a toc adjusting stub. */
9049 can_plt_call = TRUE;
9050 }
9051 else
9052 {
9053 if (strcmp (input_section->output_section->name,
9054 ".init") == 0
9055 || strcmp (input_section->output_section->name,
9056 ".fini") == 0)
9057 (*_bfd_error_handler)
9058 (_("%B(%A+0x%lx): automatic multiple TOCs "
9059 "not supported using your crt files; "
9060 "recompile with -mminimal-toc or upgrade gcc"),
9061 input_bfd,
9062 input_section,
9063 (long) rel->r_offset);
9064 else
9065 (*_bfd_error_handler)
9066 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9067 "does not allow automatic multiple TOCs; "
9068 "recompile with -mminimal-toc or "
9069 "-fno-optimize-sibling-calls, "
9070 "or make `%s' extern"),
9071 input_bfd,
9072 input_section,
9073 (long) rel->r_offset,
9074 sym_name,
9075 sym_name);
9076 bfd_set_error (bfd_error_bad_value);
9077 ret = FALSE;
9078 }
9079 }
9080
9081 if (can_plt_call
9082 && stub_entry->stub_type == ppc_stub_plt_call)
9083 unresolved_reloc = FALSE;
9084 }
9085
9086 if (stub_entry == NULL
9087 && get_opd_info (sec) != NULL)
9088 {
9089 /* The branch destination is the value of the opd entry. */
9090 bfd_vma off = (relocation - sec->output_section->vma
9091 - sec->output_offset + rel->r_addend);
9092 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9093 if (dest != (bfd_vma) -1)
9094 {
9095 relocation = dest;
9096 addend = 0;
9097 }
9098 }
9099
9100 /* If the branch is out of reach we ought to have a long
9101 branch stub. */
9102 from = (rel->r_offset
9103 + input_section->output_offset
9104 + input_section->output_section->vma);
9105
9106 if (stub_entry == NULL
9107 && (relocation + rel->r_addend - from + max_br_offset
9108 >= 2 * max_br_offset)
9109 && r_type != R_PPC64_ADDR14_BRTAKEN
9110 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9111 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9112 htab);
9113
9114 if (stub_entry != NULL)
9115 {
9116 /* Munge up the value and addend so that we call the stub
9117 rather than the procedure directly. */
9118 relocation = (stub_entry->stub_offset
9119 + stub_entry->stub_sec->output_offset
9120 + stub_entry->stub_sec->output_section->vma);
9121 addend = 0;
9122 }
9123
9124 if (insn != 0)
9125 {
9126 if (is_power4)
9127 {
9128 /* Set 'a' bit. This is 0b00010 in BO field for branch
9129 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9130 for branch on CTR insns (BO == 1a00t or 1a01t). */
9131 if ((insn & (0x14 << 21)) == (0x04 << 21))
9132 insn |= 0x02 << 21;
9133 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9134 insn |= 0x08 << 21;
9135 else
9136 break;
9137 }
9138 else
9139 {
9140 /* Invert 'y' bit if not the default. */
9141 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9142 insn ^= 0x01 << 21;
9143 }
9144
9145 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9146 }
9147
9148 /* NOP out calls to undefined weak functions.
9149 We can thus call a weak function without first
9150 checking whether the function is defined. */
9151 else if (h != NULL
9152 && h->elf.root.type == bfd_link_hash_undefweak
9153 && r_type == R_PPC64_REL24
9154 && relocation == 0
9155 && rel->r_addend == 0)
9156 {
9157 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9158 continue;
9159 }
9160 break;
9161 }
9162
9163 /* Set `addend'. */
9164 tls_type = 0;
9165 switch (r_type)
9166 {
9167 default:
9168 (*_bfd_error_handler)
9169 (_("%B: unknown relocation type %d for symbol %s"),
9170 input_bfd, (int) r_type, sym_name);
9171
9172 bfd_set_error (bfd_error_bad_value);
9173 ret = FALSE;
9174 continue;
9175
9176 case R_PPC64_NONE:
9177 case R_PPC64_TLS:
9178 case R_PPC64_GNU_VTINHERIT:
9179 case R_PPC64_GNU_VTENTRY:
9180 continue;
9181
9182 /* GOT16 relocations. Like an ADDR16 using the symbol's
9183 address in the GOT as relocation value instead of the
9184 symbol's value itself. Also, create a GOT entry for the
9185 symbol and put the symbol value there. */
9186 case R_PPC64_GOT_TLSGD16:
9187 case R_PPC64_GOT_TLSGD16_LO:
9188 case R_PPC64_GOT_TLSGD16_HI:
9189 case R_PPC64_GOT_TLSGD16_HA:
9190 tls_type = TLS_TLS | TLS_GD;
9191 goto dogot;
9192
9193 case R_PPC64_GOT_TLSLD16:
9194 case R_PPC64_GOT_TLSLD16_LO:
9195 case R_PPC64_GOT_TLSLD16_HI:
9196 case R_PPC64_GOT_TLSLD16_HA:
9197 tls_type = TLS_TLS | TLS_LD;
9198 goto dogot;
9199
9200 case R_PPC64_GOT_TPREL16_DS:
9201 case R_PPC64_GOT_TPREL16_LO_DS:
9202 case R_PPC64_GOT_TPREL16_HI:
9203 case R_PPC64_GOT_TPREL16_HA:
9204 tls_type = TLS_TLS | TLS_TPREL;
9205 goto dogot;
9206
9207 case R_PPC64_GOT_DTPREL16_DS:
9208 case R_PPC64_GOT_DTPREL16_LO_DS:
9209 case R_PPC64_GOT_DTPREL16_HI:
9210 case R_PPC64_GOT_DTPREL16_HA:
9211 tls_type = TLS_TLS | TLS_DTPREL;
9212 goto dogot;
9213
9214 case R_PPC64_GOT16:
9215 case R_PPC64_GOT16_LO:
9216 case R_PPC64_GOT16_HI:
9217 case R_PPC64_GOT16_HA:
9218 case R_PPC64_GOT16_DS:
9219 case R_PPC64_GOT16_LO_DS:
9220 dogot:
9221 {
9222 /* Relocation is to the entry for this symbol in the global
9223 offset table. */
9224 asection *got;
9225 bfd_vma *offp;
9226 bfd_vma off;
9227 unsigned long indx = 0;
9228
9229 if (tls_type == (TLS_TLS | TLS_LD)
9230 && (h == NULL
9231 || (h->elf.elf_link_hash_flags
9232 & ELF_LINK_HASH_DEF_DYNAMIC) == 0))
9233 offp = &ppc64_tlsld_got (input_bfd)->offset;
9234 else
9235 {
9236 struct got_entry *ent;
9237
9238 if (h != NULL)
9239 {
9240 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9241 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
9242 &h->elf)
9243 || (info->shared
9244 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
9245 /* This is actually a static link, or it is a
9246 -Bsymbolic link and the symbol is defined
9247 locally, or the symbol was forced to be local
9248 because of a version file. */
9249 ;
9250 else
9251 {
9252 indx = h->elf.dynindx;
9253 unresolved_reloc = FALSE;
9254 }
9255 ent = h->elf.got.glist;
9256 }
9257 else
9258 {
9259 if (local_got_ents == NULL)
9260 abort ();
9261 ent = local_got_ents[r_symndx];
9262 }
9263
9264 for (; ent != NULL; ent = ent->next)
9265 if (ent->addend == rel->r_addend
9266 && ent->owner == input_bfd
9267 && ent->tls_type == tls_type)
9268 break;
9269 if (ent == NULL)
9270 abort ();
9271 offp = &ent->got.offset;
9272 }
9273
9274 got = ppc64_elf_tdata (input_bfd)->got;
9275 if (got == NULL)
9276 abort ();
9277
9278 /* The offset must always be a multiple of 8. We use the
9279 least significant bit to record whether we have already
9280 processed this entry. */
9281 off = *offp;
9282 if ((off & 1) != 0)
9283 off &= ~1;
9284 else
9285 {
9286 /* Generate relocs for the dynamic linker, except in
9287 the case of TLSLD where we'll use one entry per
9288 module. */
9289 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
9290
9291 *offp = off | 1;
9292 if ((info->shared || indx != 0)
9293 && (h == NULL
9294 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
9295 || h->elf.root.type != bfd_link_hash_undefweak))
9296 {
9297 outrel.r_offset = (got->output_section->vma
9298 + got->output_offset
9299 + off);
9300 outrel.r_addend = rel->r_addend;
9301 if (tls_type & (TLS_LD | TLS_GD))
9302 {
9303 outrel.r_addend = 0;
9304 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
9305 if (tls_type == (TLS_TLS | TLS_GD))
9306 {
9307 loc = relgot->contents;
9308 loc += (relgot->reloc_count++
9309 * sizeof (Elf64_External_Rela));
9310 bfd_elf64_swap_reloca_out (output_bfd,
9311 &outrel, loc);
9312 outrel.r_offset += 8;
9313 outrel.r_addend = rel->r_addend;
9314 outrel.r_info
9315 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9316 }
9317 }
9318 else if (tls_type == (TLS_TLS | TLS_DTPREL))
9319 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9320 else if (tls_type == (TLS_TLS | TLS_TPREL))
9321 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
9322 else if (indx == 0)
9323 {
9324 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
9325
9326 /* Write the .got section contents for the sake
9327 of prelink. */
9328 loc = got->contents + off;
9329 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
9330 loc);
9331 }
9332 else
9333 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
9334
9335 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
9336 {
9337 outrel.r_addend += relocation;
9338 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
9339 outrel.r_addend -= htab->elf.tls_sec->vma;
9340 }
9341 loc = relgot->contents;
9342 loc += (relgot->reloc_count++
9343 * sizeof (Elf64_External_Rela));
9344 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9345 }
9346
9347 /* Init the .got section contents here if we're not
9348 emitting a reloc. */
9349 else
9350 {
9351 relocation += rel->r_addend;
9352 if (tls_type == (TLS_TLS | TLS_LD))
9353 relocation = 1;
9354 else if (tls_type != 0)
9355 {
9356 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
9357 if (tls_type == (TLS_TLS | TLS_TPREL))
9358 relocation += DTP_OFFSET - TP_OFFSET;
9359
9360 if (tls_type == (TLS_TLS | TLS_GD))
9361 {
9362 bfd_put_64 (output_bfd, relocation,
9363 got->contents + off + 8);
9364 relocation = 1;
9365 }
9366 }
9367
9368 bfd_put_64 (output_bfd, relocation,
9369 got->contents + off);
9370 }
9371 }
9372
9373 if (off >= (bfd_vma) -2)
9374 abort ();
9375
9376 relocation = got->output_offset + off;
9377
9378 /* TOC base (r2) is TOC start plus 0x8000. */
9379 addend = -TOC_BASE_OFF;
9380 }
9381 break;
9382
9383 case R_PPC64_PLT16_HA:
9384 case R_PPC64_PLT16_HI:
9385 case R_PPC64_PLT16_LO:
9386 case R_PPC64_PLT32:
9387 case R_PPC64_PLT64:
9388 /* Relocation is to the entry for this symbol in the
9389 procedure linkage table. */
9390
9391 /* Resolve a PLT reloc against a local symbol directly,
9392 without using the procedure linkage table. */
9393 if (h == NULL)
9394 break;
9395
9396 /* It's possible that we didn't make a PLT entry for this
9397 symbol. This happens when statically linking PIC code,
9398 or when using -Bsymbolic. Go find a match if there is a
9399 PLT entry. */
9400 if (htab->plt != NULL)
9401 {
9402 struct plt_entry *ent;
9403 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
9404 if (ent->addend == rel->r_addend
9405 && ent->plt.offset != (bfd_vma) -1)
9406 {
9407 relocation = (htab->plt->output_section->vma
9408 + htab->plt->output_offset
9409 + ent->plt.offset);
9410 unresolved_reloc = FALSE;
9411 }
9412 }
9413 break;
9414
9415 case R_PPC64_TOC:
9416 /* Relocation value is TOC base. */
9417 relocation = TOCstart;
9418 if (r_symndx == 0)
9419 relocation += htab->stub_group[input_section->id].toc_off;
9420 else if (unresolved_reloc)
9421 ;
9422 else if (sec != NULL && sec->id <= htab->top_id)
9423 relocation += htab->stub_group[sec->id].toc_off;
9424 else
9425 unresolved_reloc = TRUE;
9426 goto dodyn2;
9427
9428 /* TOC16 relocs. We want the offset relative to the TOC base,
9429 which is the address of the start of the TOC plus 0x8000.
9430 The TOC consists of sections .got, .toc, .tocbss, and .plt,
9431 in this order. */
9432 case R_PPC64_TOC16:
9433 case R_PPC64_TOC16_LO:
9434 case R_PPC64_TOC16_HI:
9435 case R_PPC64_TOC16_DS:
9436 case R_PPC64_TOC16_LO_DS:
9437 case R_PPC64_TOC16_HA:
9438 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
9439 break;
9440
9441 /* Relocate against the beginning of the section. */
9442 case R_PPC64_SECTOFF:
9443 case R_PPC64_SECTOFF_LO:
9444 case R_PPC64_SECTOFF_HI:
9445 case R_PPC64_SECTOFF_DS:
9446 case R_PPC64_SECTOFF_LO_DS:
9447 case R_PPC64_SECTOFF_HA:
9448 if (sec != NULL)
9449 addend -= sec->output_section->vma;
9450 break;
9451
9452 case R_PPC64_REL14:
9453 case R_PPC64_REL14_BRNTAKEN:
9454 case R_PPC64_REL14_BRTAKEN:
9455 case R_PPC64_REL24:
9456 break;
9457
9458 case R_PPC64_TPREL16:
9459 case R_PPC64_TPREL16_LO:
9460 case R_PPC64_TPREL16_HI:
9461 case R_PPC64_TPREL16_HA:
9462 case R_PPC64_TPREL16_DS:
9463 case R_PPC64_TPREL16_LO_DS:
9464 case R_PPC64_TPREL16_HIGHER:
9465 case R_PPC64_TPREL16_HIGHERA:
9466 case R_PPC64_TPREL16_HIGHEST:
9467 case R_PPC64_TPREL16_HIGHESTA:
9468 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9469 if (info->shared)
9470 /* The TPREL16 relocs shouldn't really be used in shared
9471 libs as they will result in DT_TEXTREL being set, but
9472 support them anyway. */
9473 goto dodyn;
9474 break;
9475
9476 case R_PPC64_DTPREL16:
9477 case R_PPC64_DTPREL16_LO:
9478 case R_PPC64_DTPREL16_HI:
9479 case R_PPC64_DTPREL16_HA:
9480 case R_PPC64_DTPREL16_DS:
9481 case R_PPC64_DTPREL16_LO_DS:
9482 case R_PPC64_DTPREL16_HIGHER:
9483 case R_PPC64_DTPREL16_HIGHERA:
9484 case R_PPC64_DTPREL16_HIGHEST:
9485 case R_PPC64_DTPREL16_HIGHESTA:
9486 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9487 break;
9488
9489 case R_PPC64_DTPMOD64:
9490 relocation = 1;
9491 addend = 0;
9492 goto dodyn;
9493
9494 case R_PPC64_TPREL64:
9495 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9496 goto dodyn;
9497
9498 case R_PPC64_DTPREL64:
9499 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9500 /* Fall thru */
9501
9502 /* Relocations that may need to be propagated if this is a
9503 dynamic object. */
9504 case R_PPC64_REL30:
9505 case R_PPC64_REL32:
9506 case R_PPC64_REL64:
9507 case R_PPC64_ADDR14:
9508 case R_PPC64_ADDR14_BRNTAKEN:
9509 case R_PPC64_ADDR14_BRTAKEN:
9510 case R_PPC64_ADDR16:
9511 case R_PPC64_ADDR16_DS:
9512 case R_PPC64_ADDR16_HA:
9513 case R_PPC64_ADDR16_HI:
9514 case R_PPC64_ADDR16_HIGHER:
9515 case R_PPC64_ADDR16_HIGHERA:
9516 case R_PPC64_ADDR16_HIGHEST:
9517 case R_PPC64_ADDR16_HIGHESTA:
9518 case R_PPC64_ADDR16_LO:
9519 case R_PPC64_ADDR16_LO_DS:
9520 case R_PPC64_ADDR24:
9521 case R_PPC64_ADDR32:
9522 case R_PPC64_ADDR64:
9523 case R_PPC64_UADDR16:
9524 case R_PPC64_UADDR32:
9525 case R_PPC64_UADDR64:
9526 /* r_symndx will be zero only for relocs against symbols
9527 from removed linkonce sections, or sections discarded by
9528 a linker script. */
9529 dodyn:
9530 if (r_symndx == 0)
9531 break;
9532 /* Fall thru. */
9533
9534 dodyn2:
9535 if ((input_section->flags & SEC_ALLOC) == 0)
9536 break;
9537
9538 if (NO_OPD_RELOCS && is_opd)
9539 break;
9540
9541 if ((info->shared
9542 && (h == NULL
9543 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
9544 || h->elf.root.type != bfd_link_hash_undefweak)
9545 && (MUST_BE_DYN_RELOC (r_type)
9546 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
9547 || (ELIMINATE_COPY_RELOCS
9548 && !info->shared
9549 && h != NULL
9550 && h->elf.dynindx != -1
9551 && !(h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF)
9552 && (h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
9553 && !(h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
9554 {
9555 Elf_Internal_Rela outrel;
9556 bfd_boolean skip, relocate;
9557 asection *sreloc;
9558 bfd_byte *loc;
9559 bfd_vma out_off;
9560
9561 /* When generating a dynamic object, these relocations
9562 are copied into the output file to be resolved at run
9563 time. */
9564
9565 skip = FALSE;
9566 relocate = FALSE;
9567
9568 out_off = _bfd_elf_section_offset (output_bfd, info,
9569 input_section, rel->r_offset);
9570 if (out_off == (bfd_vma) -1)
9571 skip = TRUE;
9572 else if (out_off == (bfd_vma) -2)
9573 skip = TRUE, relocate = TRUE;
9574 out_off += (input_section->output_section->vma
9575 + input_section->output_offset);
9576 outrel.r_offset = out_off;
9577 outrel.r_addend = rel->r_addend;
9578
9579 /* Optimize unaligned reloc use. */
9580 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
9581 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
9582 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
9583 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
9584 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
9585 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
9586 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
9587 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
9588 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
9589
9590 if (skip)
9591 memset (&outrel, 0, sizeof outrel);
9592 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
9593 && !is_opd
9594 && r_type != R_PPC64_TOC)
9595 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
9596 else
9597 {
9598 /* This symbol is local, or marked to become local,
9599 or this is an opd section reloc which must point
9600 at a local function. */
9601 outrel.r_addend += relocation;
9602 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
9603 {
9604 if (is_opd && h != NULL)
9605 {
9606 /* Lie about opd entries. This case occurs
9607 when building shared libraries and we
9608 reference a function in another shared
9609 lib. The same thing happens for a weak
9610 definition in an application that's
9611 overridden by a strong definition in a
9612 shared lib. (I believe this is a generic
9613 bug in binutils handling of weak syms.)
9614 In these cases we won't use the opd
9615 entry in this lib. */
9616 unresolved_reloc = FALSE;
9617 }
9618 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9619
9620 /* We need to relocate .opd contents for ld.so.
9621 Prelink also wants simple and consistent rules
9622 for relocs. This make all RELATIVE relocs have
9623 *r_offset equal to r_addend. */
9624 relocate = TRUE;
9625 }
9626 else
9627 {
9628 long indx = 0;
9629
9630 if (bfd_is_abs_section (sec))
9631 ;
9632 else if (sec == NULL || sec->owner == NULL)
9633 {
9634 bfd_set_error (bfd_error_bad_value);
9635 return FALSE;
9636 }
9637 else
9638 {
9639 asection *osec;
9640
9641 osec = sec->output_section;
9642 indx = elf_section_data (osec)->dynindx;
9643
9644 /* We are turning this relocation into one
9645 against a section symbol, so subtract out
9646 the output section's address but not the
9647 offset of the input section in the output
9648 section. */
9649 outrel.r_addend -= osec->vma;
9650 }
9651
9652 outrel.r_info = ELF64_R_INFO (indx, r_type);
9653 }
9654 }
9655
9656 sreloc = elf_section_data (input_section)->sreloc;
9657 if (sreloc == NULL)
9658 abort ();
9659
9660 loc = sreloc->contents;
9661 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
9662 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9663
9664 /* If this reloc is against an external symbol, it will
9665 be computed at runtime, so there's no need to do
9666 anything now. However, for the sake of prelink ensure
9667 that the section contents are a known value. */
9668 if (! relocate)
9669 {
9670 unresolved_reloc = FALSE;
9671 /* The value chosen here is quite arbitrary as ld.so
9672 ignores section contents except for the special
9673 case of .opd where the contents might be accessed
9674 before relocation. Choose zero, as that won't
9675 cause reloc overflow. */
9676 relocation = 0;
9677 addend = 0;
9678 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
9679 to improve backward compatibility with older
9680 versions of ld. */
9681 if (r_type == R_PPC64_ADDR64)
9682 addend = outrel.r_addend;
9683 /* Adjust pc_relative relocs to have zero in *r_offset. */
9684 else if (ppc64_elf_howto_table[r_type]->pc_relative)
9685 addend = (input_section->output_section->vma
9686 + input_section->output_offset
9687 + rel->r_offset);
9688 }
9689 }
9690 break;
9691
9692 case R_PPC64_COPY:
9693 case R_PPC64_GLOB_DAT:
9694 case R_PPC64_JMP_SLOT:
9695 case R_PPC64_RELATIVE:
9696 /* We shouldn't ever see these dynamic relocs in relocatable
9697 files. */
9698 /* Fall through. */
9699
9700 case R_PPC64_PLTGOT16:
9701 case R_PPC64_PLTGOT16_DS:
9702 case R_PPC64_PLTGOT16_HA:
9703 case R_PPC64_PLTGOT16_HI:
9704 case R_PPC64_PLTGOT16_LO:
9705 case R_PPC64_PLTGOT16_LO_DS:
9706 case R_PPC64_PLTREL32:
9707 case R_PPC64_PLTREL64:
9708 /* These ones haven't been implemented yet. */
9709
9710 (*_bfd_error_handler)
9711 (_("%B: relocation %s is not supported for symbol %s."),
9712 input_bfd,
9713 ppc64_elf_howto_table[r_type]->name, sym_name);
9714
9715 bfd_set_error (bfd_error_invalid_operation);
9716 ret = FALSE;
9717 continue;
9718 }
9719
9720 /* Do any further special processing. */
9721 switch (r_type)
9722 {
9723 default:
9724 break;
9725
9726 case R_PPC64_ADDR16_HA:
9727 case R_PPC64_ADDR16_HIGHERA:
9728 case R_PPC64_ADDR16_HIGHESTA:
9729 case R_PPC64_GOT16_HA:
9730 case R_PPC64_PLTGOT16_HA:
9731 case R_PPC64_PLT16_HA:
9732 case R_PPC64_TOC16_HA:
9733 case R_PPC64_SECTOFF_HA:
9734 case R_PPC64_TPREL16_HA:
9735 case R_PPC64_DTPREL16_HA:
9736 case R_PPC64_GOT_TLSGD16_HA:
9737 case R_PPC64_GOT_TLSLD16_HA:
9738 case R_PPC64_GOT_TPREL16_HA:
9739 case R_PPC64_GOT_DTPREL16_HA:
9740 case R_PPC64_TPREL16_HIGHER:
9741 case R_PPC64_TPREL16_HIGHERA:
9742 case R_PPC64_TPREL16_HIGHEST:
9743 case R_PPC64_TPREL16_HIGHESTA:
9744 case R_PPC64_DTPREL16_HIGHER:
9745 case R_PPC64_DTPREL16_HIGHERA:
9746 case R_PPC64_DTPREL16_HIGHEST:
9747 case R_PPC64_DTPREL16_HIGHESTA:
9748 /* It's just possible that this symbol is a weak symbol
9749 that's not actually defined anywhere. In that case,
9750 'sec' would be NULL, and we should leave the symbol
9751 alone (it will be set to zero elsewhere in the link). */
9752 if (sec != NULL)
9753 /* Add 0x10000 if sign bit in 0:15 is set.
9754 Bits 0:15 are not used. */
9755 addend += 0x8000;
9756 break;
9757
9758 case R_PPC64_ADDR16_DS:
9759 case R_PPC64_ADDR16_LO_DS:
9760 case R_PPC64_GOT16_DS:
9761 case R_PPC64_GOT16_LO_DS:
9762 case R_PPC64_PLT16_LO_DS:
9763 case R_PPC64_SECTOFF_DS:
9764 case R_PPC64_SECTOFF_LO_DS:
9765 case R_PPC64_TOC16_DS:
9766 case R_PPC64_TOC16_LO_DS:
9767 case R_PPC64_PLTGOT16_DS:
9768 case R_PPC64_PLTGOT16_LO_DS:
9769 case R_PPC64_GOT_TPREL16_DS:
9770 case R_PPC64_GOT_TPREL16_LO_DS:
9771 case R_PPC64_GOT_DTPREL16_DS:
9772 case R_PPC64_GOT_DTPREL16_LO_DS:
9773 case R_PPC64_TPREL16_DS:
9774 case R_PPC64_TPREL16_LO_DS:
9775 case R_PPC64_DTPREL16_DS:
9776 case R_PPC64_DTPREL16_LO_DS:
9777 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9778 mask = 3;
9779 /* If this reloc is against an lq insn, then the value must be
9780 a multiple of 16. This is somewhat of a hack, but the
9781 "correct" way to do this by defining _DQ forms of all the
9782 _DS relocs bloats all reloc switches in this file. It
9783 doesn't seem to make much sense to use any of these relocs
9784 in data, so testing the insn should be safe. */
9785 if ((insn & (0x3f << 26)) == (56u << 26))
9786 mask = 15;
9787 if (((relocation + addend) & mask) != 0)
9788 {
9789 (*_bfd_error_handler)
9790 (_("%B: error: relocation %s not a multiple of %d"),
9791 input_bfd,
9792 ppc64_elf_howto_table[r_type]->name,
9793 mask + 1);
9794 bfd_set_error (bfd_error_bad_value);
9795 ret = FALSE;
9796 continue;
9797 }
9798 break;
9799 }
9800
9801 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9802 because such sections are not SEC_ALLOC and thus ld.so will
9803 not process them. */
9804 if (unresolved_reloc
9805 && !((input_section->flags & SEC_DEBUGGING) != 0
9806 && (h->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
9807 {
9808 (*_bfd_error_handler)
9809 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9810 input_bfd,
9811 input_section,
9812 (long) rel->r_offset,
9813 ppc64_elf_howto_table[(int) r_type]->name,
9814 h->elf.root.root.string);
9815 ret = FALSE;
9816 }
9817
9818 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
9819 input_bfd,
9820 input_section,
9821 contents,
9822 rel->r_offset,
9823 relocation,
9824 addend);
9825
9826 if (r != bfd_reloc_ok)
9827 {
9828 if (sym_name == NULL)
9829 sym_name = "(null)";
9830 if (r == bfd_reloc_overflow)
9831 {
9832 if (warned)
9833 continue;
9834 if (h != NULL
9835 && h->elf.root.type == bfd_link_hash_undefweak
9836 && ppc64_elf_howto_table[r_type]->pc_relative)
9837 {
9838 /* Assume this is a call protected by other code that
9839 detects the symbol is undefined. If this is the case,
9840 we can safely ignore the overflow. If not, the
9841 program is hosed anyway, and a little warning isn't
9842 going to help. */
9843
9844 continue;
9845 }
9846
9847 if (!((*info->callbacks->reloc_overflow)
9848 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
9849 rel->r_addend, input_bfd, input_section, rel->r_offset)))
9850 return FALSE;
9851 }
9852 else
9853 {
9854 (*_bfd_error_handler)
9855 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
9856 input_bfd,
9857 input_section,
9858 (long) rel->r_offset,
9859 ppc64_elf_howto_table[r_type]->name,
9860 sym_name,
9861 (int) r);
9862 ret = FALSE;
9863 }
9864 }
9865 }
9866
9867 return ret;
9868 }
9869
9870 /* Adjust the value of any local symbols in opd sections. */
9871
9872 static bfd_boolean
9873 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
9874 const char *name ATTRIBUTE_UNUSED,
9875 Elf_Internal_Sym *elfsym,
9876 asection *input_sec,
9877 struct elf_link_hash_entry *h)
9878 {
9879 long *opd_adjust, adjust;
9880 bfd_vma value;
9881
9882 if (h != NULL)
9883 return TRUE;
9884
9885 opd_adjust = get_opd_info (input_sec);
9886 if (opd_adjust == NULL)
9887 return TRUE;
9888
9889 value = elfsym->st_value - input_sec->output_offset;
9890 if (!info->relocatable)
9891 value -= input_sec->output_section->vma;
9892
9893 adjust = opd_adjust[value / 8];
9894 if (adjust == -1)
9895 elfsym->st_value = 0;
9896 else
9897 elfsym->st_value += adjust;
9898 return TRUE;
9899 }
9900
9901 /* Finish up dynamic symbol handling. We set the contents of various
9902 dynamic sections here. */
9903
9904 static bfd_boolean
9905 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
9906 struct bfd_link_info *info,
9907 struct elf_link_hash_entry *h,
9908 Elf_Internal_Sym *sym)
9909 {
9910 struct ppc_link_hash_table *htab;
9911 bfd *dynobj;
9912 struct plt_entry *ent;
9913 Elf_Internal_Rela rela;
9914 bfd_byte *loc;
9915
9916 htab = ppc_hash_table (info);
9917 dynobj = htab->elf.dynobj;
9918
9919 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9920 if (ent->plt.offset != (bfd_vma) -1)
9921 {
9922 /* This symbol has an entry in the procedure linkage
9923 table. Set it up. */
9924
9925 if (htab->plt == NULL
9926 || htab->relplt == NULL
9927 || htab->glink == NULL)
9928 abort ();
9929
9930 /* Create a JMP_SLOT reloc to inform the dynamic linker to
9931 fill in the PLT entry. */
9932 rela.r_offset = (htab->plt->output_section->vma
9933 + htab->plt->output_offset
9934 + ent->plt.offset);
9935 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
9936 rela.r_addend = ent->addend;
9937
9938 loc = htab->relplt->contents;
9939 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
9940 * sizeof (Elf64_External_Rela));
9941 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9942 }
9943
9944 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
9945 {
9946 Elf_Internal_Rela rela;
9947 bfd_byte *loc;
9948
9949 /* This symbol needs a copy reloc. Set it up. */
9950
9951 if (h->dynindx == -1
9952 || (h->root.type != bfd_link_hash_defined
9953 && h->root.type != bfd_link_hash_defweak)
9954 || htab->relbss == NULL)
9955 abort ();
9956
9957 rela.r_offset = (h->root.u.def.value
9958 + h->root.u.def.section->output_section->vma
9959 + h->root.u.def.section->output_offset);
9960 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
9961 rela.r_addend = 0;
9962 loc = htab->relbss->contents;
9963 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
9964 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9965 }
9966
9967 /* Mark some specially defined symbols as absolute. */
9968 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
9969 sym->st_shndx = SHN_ABS;
9970
9971 return TRUE;
9972 }
9973
9974 /* Used to decide how to sort relocs in an optimal manner for the
9975 dynamic linker, before writing them out. */
9976
9977 static enum elf_reloc_type_class
9978 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
9979 {
9980 enum elf_ppc64_reloc_type r_type;
9981
9982 r_type = ELF64_R_TYPE (rela->r_info);
9983 switch (r_type)
9984 {
9985 case R_PPC64_RELATIVE:
9986 return reloc_class_relative;
9987 case R_PPC64_JMP_SLOT:
9988 return reloc_class_plt;
9989 case R_PPC64_COPY:
9990 return reloc_class_copy;
9991 default:
9992 return reloc_class_normal;
9993 }
9994 }
9995
9996 /* Finish up the dynamic sections. */
9997
9998 static bfd_boolean
9999 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10000 struct bfd_link_info *info)
10001 {
10002 struct ppc_link_hash_table *htab;
10003 bfd *dynobj;
10004 asection *sdyn;
10005
10006 htab = ppc_hash_table (info);
10007 dynobj = htab->elf.dynobj;
10008 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10009
10010 if (htab->elf.dynamic_sections_created)
10011 {
10012 Elf64_External_Dyn *dyncon, *dynconend;
10013
10014 if (sdyn == NULL || htab->got == NULL)
10015 abort ();
10016
10017 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10018 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10019 for (; dyncon < dynconend; dyncon++)
10020 {
10021 Elf_Internal_Dyn dyn;
10022 asection *s;
10023
10024 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10025
10026 switch (dyn.d_tag)
10027 {
10028 default:
10029 continue;
10030
10031 case DT_PPC64_GLINK:
10032 s = htab->glink;
10033 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10034 /* We stupidly defined DT_PPC64_GLINK to be the start
10035 of glink rather than the first entry point, which is
10036 what ld.so needs, and now have a bigger stub to
10037 support automatic multiple TOCs. */
10038 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10039 break;
10040
10041 case DT_PPC64_OPD:
10042 s = bfd_get_section_by_name (output_bfd, ".opd");
10043 if (s == NULL)
10044 continue;
10045 dyn.d_un.d_ptr = s->vma;
10046 break;
10047
10048 case DT_PPC64_OPDSZ:
10049 s = bfd_get_section_by_name (output_bfd, ".opd");
10050 if (s == NULL)
10051 continue;
10052 dyn.d_un.d_val = s->size;
10053 break;
10054
10055 case DT_PLTGOT:
10056 s = htab->plt;
10057 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10058 break;
10059
10060 case DT_JMPREL:
10061 s = htab->relplt;
10062 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10063 break;
10064
10065 case DT_PLTRELSZ:
10066 dyn.d_un.d_val = htab->relplt->size;
10067 break;
10068
10069 case DT_RELASZ:
10070 /* Don't count procedure linkage table relocs in the
10071 overall reloc count. */
10072 s = htab->relplt;
10073 if (s == NULL)
10074 continue;
10075 dyn.d_un.d_val -= s->size;
10076 break;
10077
10078 case DT_RELA:
10079 /* We may not be using the standard ELF linker script.
10080 If .rela.plt is the first .rela section, we adjust
10081 DT_RELA to not include it. */
10082 s = htab->relplt;
10083 if (s == NULL)
10084 continue;
10085 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10086 continue;
10087 dyn.d_un.d_ptr += s->size;
10088 break;
10089 }
10090
10091 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10092 }
10093 }
10094
10095 if (htab->got != NULL && htab->got->size != 0)
10096 {
10097 /* Fill in the first entry in the global offset table.
10098 We use it to hold the link-time TOCbase. */
10099 bfd_put_64 (output_bfd,
10100 elf_gp (output_bfd) + TOC_BASE_OFF,
10101 htab->got->contents);
10102
10103 /* Set .got entry size. */
10104 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10105 }
10106
10107 if (htab->plt != NULL && htab->plt->size != 0)
10108 {
10109 /* Set .plt entry size. */
10110 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10111 = PLT_ENTRY_SIZE;
10112 }
10113
10114 /* We need to handle writing out multiple GOT sections ourselves,
10115 since we didn't add them to DYNOBJ. */
10116 while ((dynobj = dynobj->link_next) != NULL)
10117 {
10118 asection *s;
10119 s = ppc64_elf_tdata (dynobj)->got;
10120 if (s != NULL
10121 && s->size != 0
10122 && s->output_section != bfd_abs_section_ptr
10123 && !bfd_set_section_contents (output_bfd, s->output_section,
10124 s->contents, s->output_offset,
10125 s->size))
10126 return FALSE;
10127 s = ppc64_elf_tdata (dynobj)->relgot;
10128 if (s != NULL
10129 && s->size != 0
10130 && s->output_section != bfd_abs_section_ptr
10131 && !bfd_set_section_contents (output_bfd, s->output_section,
10132 s->contents, s->output_offset,
10133 s->size))
10134 return FALSE;
10135 }
10136
10137 return TRUE;
10138 }
10139
10140 #include "elf64-target.h"
git-cvsimport of binutils cvsroot