Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF linker support. |
79349b09 | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
252b5132 RH |
20 | |
21 | /* ELF linker code. */ | |
22 | ||
268b6b39 | 23 | static bfd_boolean elf_section_ignore_discarded_relocs (asection *); |
252b5132 | 24 | |
252b5132 RH |
25 | /* Final phase of ELF linker. */ |
26 | ||
27 | /* A structure we use to avoid passing large numbers of arguments. */ | |
28 | ||
29 | struct elf_final_link_info | |
30 | { | |
31 | /* General link information. */ | |
32 | struct bfd_link_info *info; | |
33 | /* Output BFD. */ | |
34 | bfd *output_bfd; | |
35 | /* Symbol string table. */ | |
36 | struct bfd_strtab_hash *symstrtab; | |
37 | /* .dynsym section. */ | |
38 | asection *dynsym_sec; | |
39 | /* .hash section. */ | |
40 | asection *hash_sec; | |
41 | /* symbol version section (.gnu.version). */ | |
42 | asection *symver_sec; | |
43 | /* Buffer large enough to hold contents of any section. */ | |
44 | bfd_byte *contents; | |
45 | /* Buffer large enough to hold external relocs of any section. */ | |
268b6b39 | 46 | void *external_relocs; |
252b5132 RH |
47 | /* Buffer large enough to hold internal relocs of any section. */ |
48 | Elf_Internal_Rela *internal_relocs; | |
49 | /* Buffer large enough to hold external local symbols of any input | |
50 | BFD. */ | |
51 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
52 | /* And a buffer for symbol section indices. */ |
53 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
54 | /* Buffer large enough to hold internal local symbols of any input |
55 | BFD. */ | |
56 | Elf_Internal_Sym *internal_syms; | |
57 | /* Array large enough to hold a symbol index for each local symbol | |
58 | of any input BFD. */ | |
59 | long *indices; | |
60 | /* Array large enough to hold a section pointer for each local | |
61 | symbol of any input BFD. */ | |
62 | asection **sections; | |
63 | /* Buffer to hold swapped out symbols. */ | |
64 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
65 | /* And one for symbol section indices. */ |
66 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
67 | /* Number of swapped out symbols in buffer. */ |
68 | size_t symbuf_count; | |
69 | /* Number of symbols which fit in symbuf. */ | |
70 | size_t symbuf_size; | |
c97e73dd AM |
71 | /* And same for symshndxbuf. */ |
72 | size_t shndxbuf_size; | |
252b5132 RH |
73 | }; |
74 | ||
b34976b6 | 75 | static bfd_boolean elf_link_output_sym |
754021d0 AM |
76 | (struct elf_final_link_info *, const char *, Elf_Internal_Sym *, asection *, |
77 | struct elf_link_hash_entry *); | |
b34976b6 | 78 | static bfd_boolean elf_link_flush_output_syms |
268b6b39 | 79 | (struct elf_final_link_info *); |
b34976b6 | 80 | static bfd_boolean elf_link_output_extsym |
268b6b39 | 81 | (struct elf_link_hash_entry *, void *); |
b34976b6 | 82 | static bfd_boolean elf_link_input_bfd |
268b6b39 | 83 | (struct elf_final_link_info *, bfd *); |
b34976b6 | 84 | static bfd_boolean elf_reloc_link_order |
268b6b39 | 85 | (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *); |
252b5132 RH |
86 | |
87 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
88 | ||
89 | struct elf_outext_info | |
90 | { | |
b34976b6 AM |
91 | bfd_boolean failed; |
92 | bfd_boolean localsyms; | |
252b5132 RH |
93 | struct elf_final_link_info *finfo; |
94 | }; | |
95 | ||
1049f94e | 96 | /* When performing a relocatable link, the input relocations are |
31367b81 MM |
97 | preserved. But, if they reference global symbols, the indices |
98 | referenced must be updated. Update all the relocations in | |
99 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
100 | ||
101 | static void | |
268b6b39 AM |
102 | elf_link_adjust_relocs (bfd *abfd, |
103 | Elf_Internal_Shdr *rel_hdr, | |
104 | unsigned int count, | |
105 | struct elf_link_hash_entry **rel_hash) | |
31367b81 MM |
106 | { |
107 | unsigned int i; | |
9c5bfbb7 | 108 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf | 109 | bfd_byte *erela; |
268b6b39 AM |
110 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
111 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
209f668e | 112 | |
947216bf | 113 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
209f668e | 114 | { |
947216bf AM |
115 | swap_in = bed->s->swap_reloc_in; |
116 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 117 | } |
947216bf | 118 | else if (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) |
209f668e | 119 | { |
947216bf AM |
120 | swap_in = bed->s->swap_reloca_in; |
121 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 122 | } |
947216bf AM |
123 | else |
124 | abort (); | |
125 | ||
126 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
127 | abort (); | |
31367b81 | 128 | |
947216bf AM |
129 | erela = rel_hdr->contents; |
130 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 131 | { |
947216bf AM |
132 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
133 | unsigned int j; | |
134 | ||
31367b81 MM |
135 | if (*rel_hash == NULL) |
136 | continue; | |
137 | ||
138 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
139 | ||
947216bf AM |
140 | (*swap_in) (abfd, erela, irela); |
141 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
142 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
143 | ELF_R_TYPE (irela[j].r_info)); | |
144 | (*swap_out) (abfd, irela, erela); | |
31367b81 MM |
145 | } |
146 | } | |
147 | ||
58821868 AM |
148 | struct elf_link_sort_rela |
149 | { | |
db6751f2 JJ |
150 | bfd_vma offset; |
151 | enum elf_reloc_type_class type; | |
947216bf AM |
152 | /* We use this as an array of size int_rels_per_ext_rel. */ |
153 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
154 | }; |
155 | ||
156 | static int | |
268b6b39 | 157 | elf_link_sort_cmp1 (const void *A, const void *B) |
db6751f2 | 158 | { |
268b6b39 AM |
159 | const struct elf_link_sort_rela *a = A; |
160 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
161 | int relativea, relativeb; |
162 | ||
163 | relativea = a->type == reloc_class_relative; | |
164 | relativeb = b->type == reloc_class_relative; | |
165 | ||
166 | if (relativea < relativeb) | |
db6751f2 | 167 | return 1; |
fcfbdf31 JJ |
168 | if (relativea > relativeb) |
169 | return -1; | |
947216bf | 170 | if (ELF_R_SYM (a->rela->r_info) < ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 171 | return -1; |
947216bf | 172 | if (ELF_R_SYM (a->rela->r_info) > ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 173 | return 1; |
947216bf | 174 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 175 | return -1; |
947216bf | 176 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
177 | return 1; |
178 | return 0; | |
179 | } | |
180 | ||
181 | static int | |
268b6b39 | 182 | elf_link_sort_cmp2 (const void *A, const void *B) |
db6751f2 | 183 | { |
268b6b39 AM |
184 | const struct elf_link_sort_rela *a = A; |
185 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
186 | int copya, copyb; |
187 | ||
188 | if (a->offset < b->offset) | |
189 | return -1; | |
190 | if (a->offset > b->offset) | |
191 | return 1; | |
290394d6 JJ |
192 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
193 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
194 | if (copya < copyb) |
195 | return -1; | |
196 | if (copya > copyb) | |
197 | return 1; | |
947216bf | 198 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 199 | return -1; |
947216bf | 200 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
201 | return 1; |
202 | return 0; | |
203 | } | |
204 | ||
205 | static size_t | |
268b6b39 | 206 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) |
db6751f2 | 207 | { |
e717da7e | 208 | asection *reldyn; |
f51e552e | 209 | bfd_size_type count, size; |
947216bf AM |
210 | size_t i, ret, sort_elt, ext_size; |
211 | bfd_byte *sort, *s_non_relative, *p; | |
212 | struct elf_link_sort_rela *sq; | |
9c5bfbb7 | 213 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 214 | int i2e = bed->s->int_rels_per_ext_rel; |
268b6b39 AM |
215 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
216 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
e717da7e | 217 | struct bfd_link_order *lo; |
db6751f2 JJ |
218 | |
219 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
220 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
221 | { | |
222 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
223 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
224 | return 0; | |
947216bf AM |
225 | ext_size = sizeof (Elf_External_Rel); |
226 | swap_in = bed->s->swap_reloc_in; | |
227 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
228 | } |
229 | else | |
947216bf AM |
230 | { |
231 | ext_size = sizeof (Elf_External_Rela); | |
232 | swap_in = bed->s->swap_reloca_in; | |
233 | swap_out = bed->s->swap_reloca_out; | |
234 | } | |
235 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
236 | |
237 | size = 0; | |
e717da7e AM |
238 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
239 | if (lo->type == bfd_indirect_link_order) | |
240 | { | |
241 | asection *o = lo->u.indirect.section; | |
242 | size += o->_raw_size; | |
243 | } | |
db6751f2 JJ |
244 | |
245 | if (size != reldyn->_raw_size) | |
246 | return 0; | |
247 | ||
947216bf AM |
248 | sort_elt = (sizeof (struct elf_link_sort_rela) |
249 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
250 | sort = bfd_zmalloc (sort_elt * count); | |
251 | if (sort == NULL) | |
db6751f2 JJ |
252 | { |
253 | (*info->callbacks->warning) | |
268b6b39 | 254 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); |
db6751f2 JJ |
255 | return 0; |
256 | } | |
257 | ||
e717da7e AM |
258 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
259 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 260 | { |
947216bf | 261 | bfd_byte *erel, *erelend; |
e717da7e | 262 | asection *o = lo->u.indirect.section; |
db6751f2 | 263 | |
947216bf AM |
264 | erel = o->contents; |
265 | erelend = o->contents + o->_raw_size; | |
266 | p = sort + o->output_offset / ext_size * sort_elt; | |
267 | while (erel < erelend) | |
db6751f2 | 268 | { |
947216bf AM |
269 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
270 | (*swap_in) (abfd, erel, s->rela); | |
271 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
272 | p += sort_elt; | |
273 | erel += ext_size; | |
db6751f2 JJ |
274 | } |
275 | } | |
276 | ||
268b6b39 | 277 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); |
947216bf AM |
278 | |
279 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 280 | { |
947216bf AM |
281 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
282 | if (s->type != reloc_class_relative) | |
283 | break; | |
db6751f2 | 284 | } |
947216bf AM |
285 | ret = i; |
286 | s_non_relative = p; | |
287 | ||
288 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
289 | for (; i < count; i++, p += sort_elt) | |
290 | { | |
291 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
292 | if (ELF_R_SYM (sp->rela->r_info) != ELF_R_SYM (sq->rela->r_info)) | |
293 | sq = sp; | |
294 | sp->offset = sq->rela->r_offset; | |
295 | } | |
296 | ||
268b6b39 | 297 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); |
dc810e39 | 298 | |
e717da7e AM |
299 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
300 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 301 | { |
947216bf | 302 | bfd_byte *erel, *erelend; |
e717da7e | 303 | asection *o = lo->u.indirect.section; |
db6751f2 | 304 | |
947216bf AM |
305 | erel = o->contents; |
306 | erelend = o->contents + o->_raw_size; | |
307 | p = sort + o->output_offset / ext_size * sort_elt; | |
308 | while (erel < erelend) | |
db6751f2 | 309 | { |
947216bf AM |
310 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
311 | (*swap_out) (abfd, s->rela, erel); | |
312 | p += sort_elt; | |
313 | erel += ext_size; | |
db6751f2 JJ |
314 | } |
315 | } | |
316 | ||
5ed6aba4 | 317 | free (sort); |
db6751f2 JJ |
318 | *psec = reldyn; |
319 | return ret; | |
320 | } | |
321 | ||
252b5132 RH |
322 | /* Do the final step of an ELF link. */ |
323 | ||
b34976b6 | 324 | bfd_boolean |
268b6b39 | 325 | elf_bfd_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 326 | { |
b34976b6 AM |
327 | bfd_boolean dynamic; |
328 | bfd_boolean emit_relocs; | |
252b5132 RH |
329 | bfd *dynobj; |
330 | struct elf_final_link_info finfo; | |
331 | register asection *o; | |
332 | register struct bfd_link_order *p; | |
333 | register bfd *sub; | |
dc810e39 AM |
334 | bfd_size_type max_contents_size; |
335 | bfd_size_type max_external_reloc_size; | |
336 | bfd_size_type max_internal_reloc_count; | |
337 | bfd_size_type max_sym_count; | |
9ad5cbcf | 338 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
339 | file_ptr off; |
340 | Elf_Internal_Sym elfsym; | |
341 | unsigned int i; | |
342 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 343 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 | 344 | Elf_Internal_Shdr *symstrtab_hdr; |
9c5bfbb7 | 345 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 | 346 | struct elf_outext_info eoinfo; |
b34976b6 | 347 | bfd_boolean merged; |
db6751f2 JJ |
348 | size_t relativecount = 0; |
349 | asection *reldyn = 0; | |
dc810e39 | 350 | bfd_size_type amt; |
252b5132 | 351 | |
0eddce27 | 352 | if (! is_elf_hash_table (info->hash)) |
b34976b6 | 353 | return FALSE; |
8ea2e4bd | 354 | |
252b5132 RH |
355 | if (info->shared) |
356 | abfd->flags |= DYNAMIC; | |
357 | ||
358 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
359 | dynobj = elf_hash_table (info)->dynobj; | |
360 | ||
1049f94e | 361 | emit_relocs = (info->relocatable |
c44233aa AM |
362 | || info->emitrelocations |
363 | || bed->elf_backend_emit_relocs); | |
9317eacc | 364 | |
252b5132 RH |
365 | finfo.info = info; |
366 | finfo.output_bfd = abfd; | |
367 | finfo.symstrtab = elf_stringtab_init (); | |
368 | if (finfo.symstrtab == NULL) | |
b34976b6 | 369 | return FALSE; |
252b5132 RH |
370 | |
371 | if (! dynamic) | |
372 | { | |
373 | finfo.dynsym_sec = NULL; | |
374 | finfo.hash_sec = NULL; | |
375 | finfo.symver_sec = NULL; | |
376 | } | |
377 | else | |
378 | { | |
379 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
380 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
381 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
382 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
383 | /* Note that it is OK if symver_sec is NULL. */ | |
384 | } | |
385 | ||
386 | finfo.contents = NULL; | |
387 | finfo.external_relocs = NULL; | |
388 | finfo.internal_relocs = NULL; | |
389 | finfo.external_syms = NULL; | |
9ad5cbcf | 390 | finfo.locsym_shndx = NULL; |
252b5132 RH |
391 | finfo.internal_syms = NULL; |
392 | finfo.indices = NULL; | |
393 | finfo.sections = NULL; | |
394 | finfo.symbuf = NULL; | |
9ad5cbcf | 395 | finfo.symshndxbuf = NULL; |
252b5132 | 396 | finfo.symbuf_count = 0; |
c97e73dd | 397 | finfo.shndxbuf_size = 0; |
252b5132 RH |
398 | |
399 | /* Count up the number of relocations we will output for each output | |
400 | section, so that we know the sizes of the reloc sections. We | |
401 | also figure out some maximum sizes. */ | |
402 | max_contents_size = 0; | |
403 | max_external_reloc_size = 0; | |
404 | max_internal_reloc_count = 0; | |
405 | max_sym_count = 0; | |
9ad5cbcf | 406 | max_sym_shndx_count = 0; |
b34976b6 | 407 | merged = FALSE; |
268b6b39 | 408 | for (o = abfd->sections; o != NULL; o = o->next) |
252b5132 | 409 | { |
3f9a32bd | 410 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
252b5132 RH |
411 | o->reloc_count = 0; |
412 | ||
413 | for (p = o->link_order_head; p != NULL; p = p->next) | |
414 | { | |
3f9a32bd AM |
415 | unsigned int reloc_count = 0; |
416 | struct bfd_elf_section_data *esdi = NULL; | |
417 | unsigned int *rel_count1; | |
418 | ||
252b5132 RH |
419 | if (p->type == bfd_section_reloc_link_order |
420 | || p->type == bfd_symbol_reloc_link_order) | |
3f9a32bd | 421 | reloc_count = 1; |
252b5132 RH |
422 | else if (p->type == bfd_indirect_link_order) |
423 | { | |
424 | asection *sec; | |
425 | ||
426 | sec = p->u.indirect.section; | |
3f9a32bd | 427 | esdi = elf_section_data (sec); |
252b5132 RH |
428 | |
429 | /* Mark all sections which are to be included in the | |
430 | link. This will normally be every section. We need | |
431 | to do this so that we can identify any sections which | |
432 | the linker has decided to not include. */ | |
b34976b6 | 433 | sec->linker_mark = TRUE; |
252b5132 | 434 | |
f5fa8ca2 | 435 | if (sec->flags & SEC_MERGE) |
b34976b6 | 436 | merged = TRUE; |
f5fa8ca2 | 437 | |
1049f94e | 438 | if (info->relocatable || info->emitrelocations) |
3f9a32bd | 439 | reloc_count = sec->reloc_count; |
c44233aa | 440 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
441 | { |
442 | Elf_Internal_Rela * relocs; | |
443 | ||
268b6b39 AM |
444 | relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
445 | info->keep_memory); | |
9317eacc | 446 | |
3f9a32bd | 447 | reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs); |
9317eacc | 448 | |
6cdc0ccc | 449 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
450 | free (relocs); |
451 | } | |
252b5132 RH |
452 | |
453 | if (sec->_raw_size > max_contents_size) | |
454 | max_contents_size = sec->_raw_size; | |
455 | if (sec->_cooked_size > max_contents_size) | |
456 | max_contents_size = sec->_cooked_size; | |
457 | ||
458 | /* We are interested in just local symbols, not all | |
459 | symbols. */ | |
460 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
461 | && (sec->owner->flags & DYNAMIC) == 0) | |
462 | { | |
463 | size_t sym_count; | |
464 | ||
465 | if (elf_bad_symtab (sec->owner)) | |
466 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
467 | / sizeof (Elf_External_Sym)); | |
468 | else | |
469 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
470 | ||
471 | if (sym_count > max_sym_count) | |
472 | max_sym_count = sym_count; | |
473 | ||
9ad5cbcf AM |
474 | if (sym_count > max_sym_shndx_count |
475 | && elf_symtab_shndx (sec->owner) != 0) | |
476 | max_sym_shndx_count = sym_count; | |
477 | ||
252b5132 RH |
478 | if ((sec->flags & SEC_RELOC) != 0) |
479 | { | |
480 | size_t ext_size; | |
481 | ||
482 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
483 | if (ext_size > max_external_reloc_size) | |
484 | max_external_reloc_size = ext_size; | |
485 | if (sec->reloc_count > max_internal_reloc_count) | |
486 | max_internal_reloc_count = sec->reloc_count; | |
487 | } | |
488 | } | |
489 | } | |
3f9a32bd AM |
490 | |
491 | if (reloc_count == 0) | |
492 | continue; | |
493 | ||
494 | o->reloc_count += reloc_count; | |
495 | ||
496 | /* MIPS may have a mix of REL and RELA relocs on sections. | |
497 | To support this curious ABI we keep reloc counts in | |
498 | elf_section_data too. We must be careful to add the | |
499 | relocations from the input section to the right output | |
500 | count. FIXME: Get rid of one count. We have | |
501 | o->reloc_count == esdo->rel_count + esdo->rel_count2. */ | |
502 | rel_count1 = &esdo->rel_count; | |
503 | if (esdi != NULL) | |
504 | { | |
505 | bfd_boolean same_size; | |
506 | bfd_size_type entsize1; | |
507 | ||
508 | entsize1 = esdi->rel_hdr.sh_entsize; | |
509 | BFD_ASSERT (entsize1 == sizeof (Elf_External_Rel) | |
510 | || entsize1 == sizeof (Elf_External_Rela)); | |
511 | same_size = (!o->use_rela_p | |
512 | == (entsize1 == sizeof (Elf_External_Rel))); | |
513 | ||
514 | if (!same_size) | |
515 | rel_count1 = &esdo->rel_count2; | |
516 | ||
517 | if (esdi->rel_hdr2 != NULL) | |
518 | { | |
519 | bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize; | |
520 | unsigned int alt_count; | |
521 | unsigned int *rel_count2; | |
522 | ||
523 | BFD_ASSERT (entsize2 != entsize1 | |
524 | && (entsize2 == sizeof (Elf_External_Rel) | |
525 | || entsize2 == sizeof (Elf_External_Rela))); | |
526 | ||
527 | rel_count2 = &esdo->rel_count2; | |
528 | if (!same_size) | |
529 | rel_count2 = &esdo->rel_count; | |
530 | ||
531 | /* The following is probably too simplistic if the | |
532 | backend counts output relocs unusually. */ | |
533 | BFD_ASSERT (bed->elf_backend_count_relocs == NULL); | |
534 | alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2); | |
535 | *rel_count2 += alt_count; | |
536 | reloc_count -= alt_count; | |
537 | } | |
538 | } | |
539 | *rel_count1 += reloc_count; | |
252b5132 RH |
540 | } |
541 | ||
542 | if (o->reloc_count > 0) | |
543 | o->flags |= SEC_RELOC; | |
544 | else | |
545 | { | |
546 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
547 | set it (this is probably a bug) and if it is set | |
548 | assign_section_numbers will create a reloc section. */ | |
549 | o->flags &=~ SEC_RELOC; | |
550 | } | |
551 | ||
552 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
553 | zero. This is done in elf_fake_sections as well, but forcing | |
554 | the VMA to 0 here will ensure that relocs against these | |
555 | sections are handled correctly. */ | |
556 | if ((o->flags & SEC_ALLOC) == 0 | |
557 | && ! o->user_set_vma) | |
558 | o->vma = 0; | |
559 | } | |
560 | ||
1049f94e | 561 | if (! info->relocatable && merged) |
f5fa8ca2 | 562 | elf_link_hash_traverse (elf_hash_table (info), |
268b6b39 | 563 | _bfd_elf_link_sec_merge_syms, abfd); |
f5fa8ca2 | 564 | |
252b5132 RH |
565 | /* Figure out the file positions for everything but the symbol table |
566 | and the relocs. We set symcount to force assign_section_numbers | |
567 | to create a symbol table. */ | |
568 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
569 | BFD_ASSERT (! abfd->output_has_begun); | |
570 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
571 | goto error_return; | |
572 | ||
573 | /* That created the reloc sections. Set their sizes, and assign | |
574 | them file positions, and allocate some buffers. */ | |
575 | for (o = abfd->sections; o != NULL; o = o->next) | |
576 | { | |
577 | if ((o->flags & SEC_RELOC) != 0) | |
578 | { | |
45d6a902 AM |
579 | if (!(_bfd_elf_link_size_reloc_section |
580 | (abfd, &elf_section_data (o)->rel_hdr, o))) | |
252b5132 RH |
581 | goto error_return; |
582 | ||
23bc299b | 583 | if (elf_section_data (o)->rel_hdr2 |
45d6a902 AM |
584 | && !(_bfd_elf_link_size_reloc_section |
585 | (abfd, elf_section_data (o)->rel_hdr2, o))) | |
252b5132 | 586 | goto error_return; |
252b5132 | 587 | } |
b037af20 MM |
588 | |
589 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 590 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
591 | elf_section_data (o)->rel_count = 0; |
592 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
593 | } |
594 | ||
595 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
596 | ||
597 | /* We have now assigned file positions for all the sections except | |
598 | .symtab and .strtab. We start the .symtab section at the current | |
599 | file position, and write directly to it. We build the .strtab | |
600 | section in memory. */ | |
601 | bfd_get_symcount (abfd) = 0; | |
602 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
603 | /* sh_name is set in prep_headers. */ | |
604 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 605 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
252b5132 RH |
606 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
607 | /* sh_link is set in assign_section_numbers. */ | |
608 | /* sh_info is set below. */ | |
609 | /* sh_offset is set just below. */ | |
45d6a902 | 610 | symtab_hdr->sh_addralign = 1 << bed->s->log_file_align; |
252b5132 RH |
611 | |
612 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 613 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
614 | |
615 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
616 | incorrect. We do not yet know the size of the .symtab section. | |
617 | We correct next_file_pos below, after we do know the size. */ | |
618 | ||
619 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
620 | continuously seeking to the right position in the file. */ | |
621 | if (! info->keep_memory || max_sym_count < 20) | |
622 | finfo.symbuf_size = 20; | |
623 | else | |
624 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
625 | amt = finfo.symbuf_size; |
626 | amt *= sizeof (Elf_External_Sym); | |
268b6b39 | 627 | finfo.symbuf = bfd_malloc (amt); |
252b5132 RH |
628 | if (finfo.symbuf == NULL) |
629 | goto error_return; | |
9ad5cbcf AM |
630 | if (elf_numsections (abfd) > SHN_LORESERVE) |
631 | { | |
c97e73dd AM |
632 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
633 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
634 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 635 | amt *= sizeof (Elf_External_Sym_Shndx); |
268b6b39 | 636 | finfo.symshndxbuf = bfd_zmalloc (amt); |
9ad5cbcf AM |
637 | if (finfo.symshndxbuf == NULL) |
638 | goto error_return; | |
639 | } | |
252b5132 RH |
640 | |
641 | /* Start writing out the symbol table. The first symbol is always a | |
642 | dummy symbol. */ | |
9317eacc CM |
643 | if (info->strip != strip_all |
644 | || emit_relocs) | |
252b5132 RH |
645 | { |
646 | elfsym.st_value = 0; | |
647 | elfsym.st_size = 0; | |
648 | elfsym.st_info = 0; | |
649 | elfsym.st_other = 0; | |
650 | elfsym.st_shndx = SHN_UNDEF; | |
754021d0 AM |
651 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, bfd_und_section_ptr, |
652 | NULL)) | |
252b5132 RH |
653 | goto error_return; |
654 | } | |
655 | ||
656 | #if 0 | |
657 | /* Some standard ELF linkers do this, but we don't because it causes | |
658 | bootstrap comparison failures. */ | |
659 | /* Output a file symbol for the output file as the second symbol. | |
660 | We output this even if we are discarding local symbols, although | |
661 | I'm not sure if this is correct. */ | |
662 | elfsym.st_value = 0; | |
663 | elfsym.st_size = 0; | |
664 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
665 | elfsym.st_other = 0; | |
666 | elfsym.st_shndx = SHN_ABS; | |
667 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
754021d0 | 668 | &elfsym, bfd_abs_section_ptr, NULL)) |
252b5132 RH |
669 | goto error_return; |
670 | #endif | |
671 | ||
672 | /* Output a symbol for each section. We output these even if we are | |
673 | discarding local symbols, since they are used for relocs. These | |
674 | symbols have no names. We store the index of each one in the | |
675 | index field of the section, so that we can find it again when | |
676 | outputting relocs. */ | |
9317eacc CM |
677 | if (info->strip != strip_all |
678 | || emit_relocs) | |
252b5132 RH |
679 | { |
680 | elfsym.st_size = 0; | |
681 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
682 | elfsym.st_other = 0; | |
9ad5cbcf | 683 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
684 | { |
685 | o = section_from_elf_index (abfd, i); | |
686 | if (o != NULL) | |
687 | o->target_index = bfd_get_symcount (abfd); | |
688 | elfsym.st_shndx = i; | |
1049f94e | 689 | if (info->relocatable || o == NULL) |
252b5132 RH |
690 | elfsym.st_value = 0; |
691 | else | |
692 | elfsym.st_value = o->vma; | |
754021d0 | 693 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, o, NULL)) |
252b5132 | 694 | goto error_return; |
c97e73dd | 695 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 696 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
697 | } |
698 | } | |
699 | ||
700 | /* Allocate some memory to hold information read in from the input | |
701 | files. */ | |
9ad5cbcf AM |
702 | if (max_contents_size != 0) |
703 | { | |
268b6b39 | 704 | finfo.contents = bfd_malloc (max_contents_size); |
9ad5cbcf AM |
705 | if (finfo.contents == NULL) |
706 | goto error_return; | |
707 | } | |
708 | ||
709 | if (max_external_reloc_size != 0) | |
710 | { | |
268b6b39 | 711 | finfo.external_relocs = bfd_malloc (max_external_reloc_size); |
9ad5cbcf AM |
712 | if (finfo.external_relocs == NULL) |
713 | goto error_return; | |
714 | } | |
715 | ||
716 | if (max_internal_reloc_count != 0) | |
717 | { | |
718 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
719 | amt *= sizeof (Elf_Internal_Rela); | |
268b6b39 | 720 | finfo.internal_relocs = bfd_malloc (amt); |
9ad5cbcf AM |
721 | if (finfo.internal_relocs == NULL) |
722 | goto error_return; | |
723 | } | |
724 | ||
725 | if (max_sym_count != 0) | |
726 | { | |
727 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
268b6b39 | 728 | finfo.external_syms = bfd_malloc (amt); |
9ad5cbcf AM |
729 | if (finfo.external_syms == NULL) |
730 | goto error_return; | |
731 | ||
732 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
268b6b39 | 733 | finfo.internal_syms = bfd_malloc (amt); |
9ad5cbcf AM |
734 | if (finfo.internal_syms == NULL) |
735 | goto error_return; | |
736 | ||
737 | amt = max_sym_count * sizeof (long); | |
268b6b39 | 738 | finfo.indices = bfd_malloc (amt); |
9ad5cbcf AM |
739 | if (finfo.indices == NULL) |
740 | goto error_return; | |
741 | ||
742 | amt = max_sym_count * sizeof (asection *); | |
268b6b39 | 743 | finfo.sections = bfd_malloc (amt); |
9ad5cbcf AM |
744 | if (finfo.sections == NULL) |
745 | goto error_return; | |
746 | } | |
747 | ||
748 | if (max_sym_shndx_count != 0) | |
749 | { | |
750 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
268b6b39 | 751 | finfo.locsym_shndx = bfd_malloc (amt); |
9ad5cbcf AM |
752 | if (finfo.locsym_shndx == NULL) |
753 | goto error_return; | |
754 | } | |
252b5132 | 755 | |
e1918d23 | 756 | if (elf_hash_table (info)->tls_sec) |
13ae64f3 | 757 | { |
e1918d23 | 758 | bfd_vma base, end = 0; |
13ae64f3 JJ |
759 | asection *sec; |
760 | ||
e1918d23 | 761 | for (sec = elf_hash_table (info)->tls_sec; |
13ae64f3 JJ |
762 | sec && (sec->flags & SEC_THREAD_LOCAL); |
763 | sec = sec->next) | |
764 | { | |
765 | bfd_vma size = sec->_raw_size; | |
766 | ||
e1918d23 | 767 | if (size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) |
13ae64f3 JJ |
768 | { |
769 | struct bfd_link_order *o; | |
770 | ||
13ae64f3 JJ |
771 | for (o = sec->link_order_head; o != NULL; o = o->next) |
772 | if (size < o->offset + o->size) | |
58821868 | 773 | size = o->offset + o->size; |
13ae64f3 JJ |
774 | } |
775 | end = sec->vma + size; | |
776 | } | |
e1918d23 AM |
777 | base = elf_hash_table (info)->tls_sec->vma; |
778 | end = align_power (end, elf_hash_table (info)->tls_sec->alignment_power); | |
779 | elf_hash_table (info)->tls_size = end - base; | |
13ae64f3 JJ |
780 | } |
781 | ||
252b5132 RH |
782 | /* Since ELF permits relocations to be against local symbols, we |
783 | must have the local symbols available when we do the relocations. | |
784 | Since we would rather only read the local symbols once, and we | |
785 | would rather not keep them in memory, we handle all the | |
786 | relocations for a single input file at the same time. | |
787 | ||
788 | Unfortunately, there is no way to know the total number of local | |
789 | symbols until we have seen all of them, and the local symbol | |
790 | indices precede the global symbol indices. This means that when | |
1049f94e | 791 | we are generating relocatable output, and we see a reloc against |
252b5132 RH |
792 | a global symbol, we can not know the symbol index until we have |
793 | finished examining all the local symbols to see which ones we are | |
794 | going to output. To deal with this, we keep the relocations in | |
795 | memory, and don't output them until the end of the link. This is | |
796 | an unfortunate waste of memory, but I don't see a good way around | |
1049f94e | 797 | it. Fortunately, it only happens when performing a relocatable |
252b5132 RH |
798 | link, which is not the common case. FIXME: If keep_memory is set |
799 | we could write the relocs out and then read them again; I don't | |
800 | know how bad the memory loss will be. */ | |
801 | ||
802 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 803 | sub->output_has_begun = FALSE; |
252b5132 RH |
804 | for (o = abfd->sections; o != NULL; o = o->next) |
805 | { | |
806 | for (p = o->link_order_head; p != NULL; p = p->next) | |
807 | { | |
808 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 809 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 810 | == bfd_target_elf_flavour) |
a50c1845 | 811 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 812 | { |
252b5132 RH |
813 | if (! sub->output_has_begun) |
814 | { | |
815 | if (! elf_link_input_bfd (&finfo, sub)) | |
816 | goto error_return; | |
b34976b6 | 817 | sub->output_has_begun = TRUE; |
252b5132 RH |
818 | } |
819 | } | |
820 | else if (p->type == bfd_section_reloc_link_order | |
821 | || p->type == bfd_symbol_reloc_link_order) | |
822 | { | |
823 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
824 | goto error_return; | |
825 | } | |
826 | else | |
827 | { | |
828 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
829 | goto error_return; | |
830 | } | |
831 | } | |
832 | } | |
833 | ||
c44233aa AM |
834 | /* Output any global symbols that got converted to local in a |
835 | version script or due to symbol visibility. We do this in a | |
836 | separate step since ELF requires all local symbols to appear | |
837 | prior to any global symbols. FIXME: We should only do this if | |
838 | some global symbols were, in fact, converted to become local. | |
839 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 840 | eoinfo.failed = FALSE; |
c44233aa | 841 | eoinfo.finfo = &finfo; |
b34976b6 | 842 | eoinfo.localsyms = TRUE; |
c44233aa | 843 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
268b6b39 | 844 | &eoinfo); |
c44233aa | 845 | if (eoinfo.failed) |
b34976b6 | 846 | return FALSE; |
c44233aa | 847 | |
252b5132 | 848 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
849 | with the global symbols. Even if we want to strip everything we |
850 | can, we still need to deal with those global symbols that got | |
3e932841 | 851 | converted to local in a version script. */ |
252b5132 | 852 | |
30b30c21 | 853 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 854 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 855 | |
fc8c40a0 AM |
856 | if (dynamic |
857 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
858 | { |
859 | Elf_Internal_Sym sym; | |
860 | Elf_External_Sym *dynsym = | |
a7b97311 | 861 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 862 | long last_local = 0; |
30b30c21 RH |
863 | |
864 | /* Write out the section symbols for the output sections. */ | |
865 | if (info->shared) | |
866 | { | |
867 | asection *s; | |
868 | ||
869 | sym.st_size = 0; | |
870 | sym.st_name = 0; | |
871 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
872 | sym.st_other = 0; | |
873 | ||
874 | for (s = abfd->sections; s != NULL; s = s->next) | |
875 | { | |
876 | int indx; | |
9ad5cbcf AM |
877 | Elf_External_Sym *dest; |
878 | ||
30b30c21 RH |
879 | indx = elf_section_data (s)->this_idx; |
880 | BFD_ASSERT (indx > 0); | |
881 | sym.st_shndx = indx; | |
882 | sym.st_value = s->vma; | |
9ad5cbcf | 883 | dest = dynsym + elf_section_data (s)->dynindx; |
268b6b39 | 884 | elf_swap_symbol_out (abfd, &sym, dest, 0); |
30b30c21 RH |
885 | } |
886 | ||
887 | last_local = bfd_count_sections (abfd); | |
888 | } | |
889 | ||
890 | /* Write out the local dynsyms. */ | |
891 | if (elf_hash_table (info)->dynlocal) | |
892 | { | |
893 | struct elf_link_local_dynamic_entry *e; | |
894 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
895 | { | |
318da145 | 896 | asection *s; |
9ad5cbcf | 897 | Elf_External_Sym *dest; |
30b30c21 | 898 | |
b037af20 MM |
899 | sym.st_size = e->isym.st_size; |
900 | sym.st_other = e->isym.st_other; | |
901 | ||
1fa0ddb3 RH |
902 | /* Copy the internal symbol as is. |
903 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
904 | the original st_name with the dynstr_index. */ |
905 | sym = e->isym; | |
30b30c21 | 906 | |
c8e5ddc8 | 907 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
908 | && (e->isym.st_shndx < SHN_LORESERVE |
909 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
910 | { |
911 | s = bfd_section_from_elf_index (e->input_bfd, | |
912 | e->isym.st_shndx); | |
913 | ||
914 | sym.st_shndx = | |
915 | elf_section_data (s->output_section)->this_idx; | |
916 | sym.st_value = (s->output_section->vma | |
917 | + s->output_offset | |
918 | + e->isym.st_value); | |
919 | } | |
30b30c21 RH |
920 | |
921 | if (last_local < e->dynindx) | |
922 | last_local = e->dynindx; | |
923 | ||
9ad5cbcf | 924 | dest = dynsym + e->dynindx; |
268b6b39 | 925 | elf_swap_symbol_out (abfd, &sym, dest, 0); |
30b30c21 RH |
926 | } |
927 | } | |
928 | ||
71a40b32 ILT |
929 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
930 | last_local + 1; | |
30b30c21 | 931 | } |
252b5132 RH |
932 | |
933 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
934 | eoinfo.failed = FALSE; |
935 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
936 | eoinfo.finfo = &finfo; |
937 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
268b6b39 | 938 | &eoinfo); |
252b5132 | 939 | if (eoinfo.failed) |
b34976b6 | 940 | return FALSE; |
252b5132 | 941 | |
587ff49e RH |
942 | /* If backend needs to output some symbols not present in the hash |
943 | table, do it now. */ | |
944 | if (bed->elf_backend_output_arch_syms) | |
945 | { | |
b34976b6 | 946 | typedef bfd_boolean (*out_sym_func) |
754021d0 AM |
947 | (void *, const char *, Elf_Internal_Sym *, asection *, |
948 | struct elf_link_hash_entry *); | |
dc810e39 AM |
949 | |
950 | if (! ((*bed->elf_backend_output_arch_syms) | |
268b6b39 | 951 | (abfd, info, &finfo, (out_sym_func) elf_link_output_sym))) |
b34976b6 | 952 | return FALSE; |
3e932841 | 953 | } |
587ff49e | 954 | |
252b5132 RH |
955 | /* Flush all symbols to the file. */ |
956 | if (! elf_link_flush_output_syms (&finfo)) | |
b34976b6 | 957 | return FALSE; |
252b5132 RH |
958 | |
959 | /* Now we know the size of the symtab section. */ | |
960 | off += symtab_hdr->sh_size; | |
961 | ||
c97e73dd AM |
962 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
963 | if (symtab_shndx_hdr->sh_name != 0) | |
964 | { | |
965 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
966 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
967 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
968 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
969 | symtab_shndx_hdr->sh_size = amt; | |
970 | ||
971 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 972 | off, TRUE); |
c97e73dd AM |
973 | |
974 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 975 | || (bfd_bwrite (finfo.symshndxbuf, amt, abfd) != amt)) |
b34976b6 | 976 | return FALSE; |
c97e73dd AM |
977 | } |
978 | ||
979 | ||
252b5132 RH |
980 | /* Finish up and write out the symbol string table (.strtab) |
981 | section. */ | |
982 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
983 | /* sh_name was set in prep_headers. */ | |
984 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
985 | symstrtab_hdr->sh_flags = 0; | |
986 | symstrtab_hdr->sh_addr = 0; | |
987 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
988 | symstrtab_hdr->sh_entsize = 0; | |
989 | symstrtab_hdr->sh_link = 0; | |
990 | symstrtab_hdr->sh_info = 0; | |
991 | /* sh_offset is set just below. */ | |
992 | symstrtab_hdr->sh_addralign = 1; | |
993 | ||
b34976b6 | 994 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
995 | elf_tdata (abfd)->next_file_pos = off; |
996 | ||
997 | if (bfd_get_symcount (abfd) > 0) | |
998 | { | |
999 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
1000 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 1001 | return FALSE; |
252b5132 RH |
1002 | } |
1003 | ||
1004 | /* Adjust the relocs to have the correct symbol indices. */ | |
1005 | for (o = abfd->sections; o != NULL; o = o->next) | |
1006 | { | |
252b5132 RH |
1007 | if ((o->flags & SEC_RELOC) == 0) |
1008 | continue; | |
1009 | ||
3e932841 | 1010 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
1011 | elf_section_data (o)->rel_count, |
1012 | elf_section_data (o)->rel_hashes); | |
1013 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
1014 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
1015 | elf_section_data (o)->rel_count2, | |
3e932841 | 1016 | (elf_section_data (o)->rel_hashes |
31367b81 | 1017 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
1018 | |
1019 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
1020 | trying to swap the relocs out itself. */ | |
1021 | o->reloc_count = 0; | |
1022 | } | |
1023 | ||
db6751f2 JJ |
1024 | if (dynamic && info->combreloc && dynobj != NULL) |
1025 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
1026 | ||
252b5132 RH |
1027 | /* If we are linking against a dynamic object, or generating a |
1028 | shared library, finish up the dynamic linking information. */ | |
1029 | if (dynamic) | |
1030 | { | |
1031 | Elf_External_Dyn *dyncon, *dynconend; | |
1032 | ||
1033 | /* Fix up .dynamic entries. */ | |
1034 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1035 | BFD_ASSERT (o != NULL); | |
1036 | ||
1037 | dyncon = (Elf_External_Dyn *) o->contents; | |
1038 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
1039 | for (; dyncon < dynconend; dyncon++) | |
1040 | { | |
1041 | Elf_Internal_Dyn dyn; | |
1042 | const char *name; | |
1043 | unsigned int type; | |
1044 | ||
1045 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
1046 | ||
1047 | switch (dyn.d_tag) | |
1048 | { | |
1049 | default: | |
1050 | break; | |
db6751f2 JJ |
1051 | case DT_NULL: |
1052 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
1053 | { | |
1054 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
1055 | { | |
1056 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
1057 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
1058 | default: break; | |
1059 | } | |
1060 | if (dyn.d_tag != DT_NULL) | |
1061 | { | |
1062 | dyn.d_un.d_val = relativecount; | |
1063 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
1064 | relativecount = 0; | |
1065 | } | |
1066 | } | |
1067 | break; | |
252b5132 | 1068 | case DT_INIT: |
f0c2e336 | 1069 | name = info->init_function; |
252b5132 RH |
1070 | goto get_sym; |
1071 | case DT_FINI: | |
f0c2e336 | 1072 | name = info->fini_function; |
252b5132 RH |
1073 | get_sym: |
1074 | { | |
1075 | struct elf_link_hash_entry *h; | |
1076 | ||
1077 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 1078 | FALSE, FALSE, TRUE); |
252b5132 RH |
1079 | if (h != NULL |
1080 | && (h->root.type == bfd_link_hash_defined | |
1081 | || h->root.type == bfd_link_hash_defweak)) | |
1082 | { | |
1083 | dyn.d_un.d_val = h->root.u.def.value; | |
1084 | o = h->root.u.def.section; | |
1085 | if (o->output_section != NULL) | |
1086 | dyn.d_un.d_val += (o->output_section->vma | |
1087 | + o->output_offset); | |
1088 | else | |
1089 | { | |
1090 | /* The symbol is imported from another shared | |
1091 | library and does not apply to this one. */ | |
1092 | dyn.d_un.d_val = 0; | |
1093 | } | |
1094 | ||
1095 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
1096 | } | |
1097 | } | |
1098 | break; | |
1099 | ||
30831527 RH |
1100 | case DT_PREINIT_ARRAYSZ: |
1101 | name = ".preinit_array"; | |
1102 | goto get_size; | |
1103 | case DT_INIT_ARRAYSZ: | |
1104 | name = ".init_array"; | |
1105 | goto get_size; | |
1106 | case DT_FINI_ARRAYSZ: | |
1107 | name = ".fini_array"; | |
1108 | get_size: | |
1109 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
1110 | if (o == NULL) |
1111 | { | |
1112 | (*_bfd_error_handler) | |
1113 | (_("%s: could not find output section %s"), | |
1114 | bfd_get_filename (abfd), name); | |
1115 | goto error_return; | |
1116 | } | |
25e27870 L |
1117 | if (o->_raw_size == 0) |
1118 | (*_bfd_error_handler) | |
1119 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
1120 | dyn.d_un.d_val = o->_raw_size; |
1121 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
1122 | break; | |
1123 | ||
1124 | case DT_PREINIT_ARRAY: | |
1125 | name = ".preinit_array"; | |
1126 | goto get_vma; | |
1127 | case DT_INIT_ARRAY: | |
1128 | name = ".init_array"; | |
1129 | goto get_vma; | |
1130 | case DT_FINI_ARRAY: | |
1131 | name = ".fini_array"; | |
1132 | goto get_vma; | |
1133 | ||
252b5132 RH |
1134 | case DT_HASH: |
1135 | name = ".hash"; | |
1136 | goto get_vma; | |
1137 | case DT_STRTAB: | |
1138 | name = ".dynstr"; | |
1139 | goto get_vma; | |
1140 | case DT_SYMTAB: | |
1141 | name = ".dynsym"; | |
1142 | goto get_vma; | |
1143 | case DT_VERDEF: | |
1144 | name = ".gnu.version_d"; | |
1145 | goto get_vma; | |
1146 | case DT_VERNEED: | |
1147 | name = ".gnu.version_r"; | |
1148 | goto get_vma; | |
1149 | case DT_VERSYM: | |
1150 | name = ".gnu.version"; | |
1151 | get_vma: | |
1152 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
1153 | if (o == NULL) |
1154 | { | |
1155 | (*_bfd_error_handler) | |
1156 | (_("%s: could not find output section %s"), | |
1157 | bfd_get_filename (abfd), name); | |
1158 | goto error_return; | |
1159 | } | |
252b5132 RH |
1160 | dyn.d_un.d_ptr = o->vma; |
1161 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
1162 | break; | |
1163 | ||
1164 | case DT_REL: | |
1165 | case DT_RELA: | |
1166 | case DT_RELSZ: | |
1167 | case DT_RELASZ: | |
1168 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
1169 | type = SHT_REL; | |
1170 | else | |
1171 | type = SHT_RELA; | |
1172 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 1173 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
1174 | { |
1175 | Elf_Internal_Shdr *hdr; | |
1176 | ||
1177 | hdr = elf_elfsections (abfd)[i]; | |
1178 | if (hdr->sh_type == type | |
1179 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
1180 | { | |
1181 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
1182 | dyn.d_un.d_val += hdr->sh_size; | |
1183 | else | |
1184 | { | |
1185 | if (dyn.d_un.d_val == 0 | |
1186 | || hdr->sh_addr < dyn.d_un.d_val) | |
1187 | dyn.d_un.d_val = hdr->sh_addr; | |
1188 | } | |
1189 | } | |
1190 | } | |
1191 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | /* If we have created any dynamic sections, then output them. */ | |
1198 | if (dynobj != NULL) | |
1199 | { | |
1200 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
1201 | goto error_return; | |
1202 | ||
1203 | for (o = dynobj->sections; o != NULL; o = o->next) | |
1204 | { | |
1205 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
1206 | || o->_raw_size == 0 |
1207 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
1208 | continue; |
1209 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
1210 | { | |
1211 | /* At this point, we are only interested in sections | |
45d6a902 | 1212 | created by _bfd_elf_link_create_dynamic_sections. */ |
252b5132 RH |
1213 | continue; |
1214 | } | |
1215 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
1216 | != SHT_STRTAB) | |
1217 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
1218 | { | |
1219 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
1220 | o->contents, |
1221 | (file_ptr) o->output_offset, | |
252b5132 RH |
1222 | o->_raw_size)) |
1223 | goto error_return; | |
1224 | } | |
1225 | else | |
1226 | { | |
252b5132 | 1227 | /* The contents of the .dynstr section are actually in a |
c44233aa | 1228 | stringtab. */ |
252b5132 RH |
1229 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
1230 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
1231 | || ! _bfd_elf_strtab_emit (abfd, |
1232 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
1233 | goto error_return; |
1234 | } | |
1235 | } | |
1236 | } | |
1237 | ||
1049f94e | 1238 | if (info->relocatable) |
1126897b | 1239 | { |
b34976b6 | 1240 | bfd_boolean failed = FALSE; |
1126897b AM |
1241 | |
1242 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
1243 | if (failed) | |
1244 | goto error_return; | |
1245 | } | |
1246 | ||
252b5132 RH |
1247 | /* If we have optimized stabs strings, output them. */ |
1248 | if (elf_hash_table (info)->stab_info != NULL) | |
1249 | { | |
1250 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
1251 | goto error_return; | |
1252 | } | |
1253 | ||
126495ed | 1254 | if (info->eh_frame_hdr) |
65765700 | 1255 | { |
126495ed AM |
1256 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
1257 | goto error_return; | |
65765700 JJ |
1258 | } |
1259 | ||
252b5132 RH |
1260 | if (finfo.symstrtab != NULL) |
1261 | _bfd_stringtab_free (finfo.symstrtab); | |
1262 | if (finfo.contents != NULL) | |
1263 | free (finfo.contents); | |
1264 | if (finfo.external_relocs != NULL) | |
1265 | free (finfo.external_relocs); | |
1266 | if (finfo.internal_relocs != NULL) | |
1267 | free (finfo.internal_relocs); | |
1268 | if (finfo.external_syms != NULL) | |
1269 | free (finfo.external_syms); | |
9ad5cbcf AM |
1270 | if (finfo.locsym_shndx != NULL) |
1271 | free (finfo.locsym_shndx); | |
252b5132 RH |
1272 | if (finfo.internal_syms != NULL) |
1273 | free (finfo.internal_syms); | |
1274 | if (finfo.indices != NULL) | |
1275 | free (finfo.indices); | |
1276 | if (finfo.sections != NULL) | |
1277 | free (finfo.sections); | |
1278 | if (finfo.symbuf != NULL) | |
1279 | free (finfo.symbuf); | |
9ad5cbcf | 1280 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 1281 | free (finfo.symshndxbuf); |
252b5132 RH |
1282 | for (o = abfd->sections; o != NULL; o = o->next) |
1283 | { | |
1284 | if ((o->flags & SEC_RELOC) != 0 | |
1285 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 1286 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
1287 | } |
1288 | ||
b34976b6 | 1289 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 1290 | |
b34976b6 | 1291 | return TRUE; |
252b5132 RH |
1292 | |
1293 | error_return: | |
1294 | if (finfo.symstrtab != NULL) | |
1295 | _bfd_stringtab_free (finfo.symstrtab); | |
1296 | if (finfo.contents != NULL) | |
1297 | free (finfo.contents); | |
1298 | if (finfo.external_relocs != NULL) | |
1299 | free (finfo.external_relocs); | |
1300 | if (finfo.internal_relocs != NULL) | |
1301 | free (finfo.internal_relocs); | |
1302 | if (finfo.external_syms != NULL) | |
1303 | free (finfo.external_syms); | |
9ad5cbcf AM |
1304 | if (finfo.locsym_shndx != NULL) |
1305 | free (finfo.locsym_shndx); | |
252b5132 RH |
1306 | if (finfo.internal_syms != NULL) |
1307 | free (finfo.internal_syms); | |
1308 | if (finfo.indices != NULL) | |
1309 | free (finfo.indices); | |
1310 | if (finfo.sections != NULL) | |
1311 | free (finfo.sections); | |
1312 | if (finfo.symbuf != NULL) | |
1313 | free (finfo.symbuf); | |
9ad5cbcf | 1314 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 1315 | free (finfo.symshndxbuf); |
252b5132 RH |
1316 | for (o = abfd->sections; o != NULL; o = o->next) |
1317 | { | |
1318 | if ((o->flags & SEC_RELOC) != 0 | |
1319 | && elf_section_data (o)->rel_hashes != NULL) | |
1320 | free (elf_section_data (o)->rel_hashes); | |
1321 | } | |
1322 | ||
b34976b6 | 1323 | return FALSE; |
252b5132 RH |
1324 | } |
1325 | ||
1326 | /* Add a symbol to the output symbol table. */ | |
1327 | ||
b34976b6 | 1328 | static bfd_boolean |
268b6b39 AM |
1329 | elf_link_output_sym (struct elf_final_link_info *finfo, |
1330 | const char *name, | |
1331 | Elf_Internal_Sym *elfsym, | |
754021d0 AM |
1332 | asection *input_sec, |
1333 | struct elf_link_hash_entry *h) | |
252b5132 | 1334 | { |
9ad5cbcf AM |
1335 | Elf_External_Sym *dest; |
1336 | Elf_External_Sym_Shndx *destshndx; | |
b34976b6 | 1337 | bfd_boolean (*output_symbol_hook) |
754021d0 AM |
1338 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
1339 | struct elf_link_hash_entry *); | |
252b5132 RH |
1340 | |
1341 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
1342 | elf_backend_link_output_symbol_hook; | |
1343 | if (output_symbol_hook != NULL) | |
1344 | { | |
754021d0 | 1345 | if (! (*output_symbol_hook) (finfo->info, name, elfsym, input_sec, h)) |
b34976b6 | 1346 | return FALSE; |
252b5132 RH |
1347 | } |
1348 | ||
268b6b39 | 1349 | if (name == NULL || *name == '\0') |
252b5132 RH |
1350 | elfsym->st_name = 0; |
1351 | else if (input_sec->flags & SEC_EXCLUDE) | |
1352 | elfsym->st_name = 0; | |
1353 | else | |
1354 | { | |
1355 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 1356 | name, TRUE, FALSE); |
252b5132 | 1357 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 1358 | return FALSE; |
252b5132 RH |
1359 | } |
1360 | ||
1361 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
1362 | { | |
1363 | if (! elf_link_flush_output_syms (finfo)) | |
b34976b6 | 1364 | return FALSE; |
252b5132 RH |
1365 | } |
1366 | ||
9ad5cbcf AM |
1367 | dest = finfo->symbuf + finfo->symbuf_count; |
1368 | destshndx = finfo->symshndxbuf; | |
1369 | if (destshndx != NULL) | |
c97e73dd AM |
1370 | { |
1371 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
1372 | { | |
1373 | bfd_size_type amt; | |
252b5132 | 1374 | |
c97e73dd AM |
1375 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
1376 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
1377 | if (destshndx == NULL) | |
b34976b6 | 1378 | return FALSE; |
c97e73dd AM |
1379 | memset ((char *) destshndx + amt, 0, amt); |
1380 | finfo->shndxbuf_size *= 2; | |
1381 | } | |
1382 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
1383 | } | |
1384 | ||
268b6b39 | 1385 | elf_swap_symbol_out (finfo->output_bfd, elfsym, dest, destshndx); |
c97e73dd AM |
1386 | finfo->symbuf_count += 1; |
1387 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 1388 | |
b34976b6 | 1389 | return TRUE; |
252b5132 RH |
1390 | } |
1391 | ||
1392 | /* Flush the output symbols to the file. */ | |
1393 | ||
b34976b6 | 1394 | static bfd_boolean |
268b6b39 | 1395 | elf_link_flush_output_syms (struct elf_final_link_info *finfo) |
252b5132 RH |
1396 | { |
1397 | if (finfo->symbuf_count > 0) | |
1398 | { | |
9ad5cbcf | 1399 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
1400 | file_ptr pos; |
1401 | bfd_size_type amt; | |
252b5132 | 1402 | |
9ad5cbcf AM |
1403 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
1404 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
1405 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
1406 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
268b6b39 | 1407 | || bfd_bwrite (finfo->symbuf, amt, finfo->output_bfd) != amt) |
b34976b6 | 1408 | return FALSE; |
252b5132 | 1409 | |
9ad5cbcf | 1410 | hdr->sh_size += amt; |
252b5132 RH |
1411 | finfo->symbuf_count = 0; |
1412 | } | |
1413 | ||
b34976b6 | 1414 | return TRUE; |
252b5132 RH |
1415 | } |
1416 | ||
f5d44ba0 AM |
1417 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
1418 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
71552942 L |
1419 | versioned symbol that would normally require an explicit version. |
1420 | We also handle the case that a DSO references a hidden symbol | |
1421 | which may be satisfied by a versioned symbol in another DSO. */ | |
f5d44ba0 | 1422 | |
b34976b6 | 1423 | static bfd_boolean |
268b6b39 AM |
1424 | elf_link_check_versioned_symbol (struct bfd_link_info *info, |
1425 | struct elf_link_hash_entry *h) | |
f5d44ba0 | 1426 | { |
71552942 | 1427 | bfd *abfd; |
f5d44ba0 | 1428 | struct elf_link_loaded_list *loaded; |
f5d44ba0 | 1429 | |
0eddce27 | 1430 | if (!is_elf_hash_table (info->hash)) |
b34976b6 | 1431 | return FALSE; |
f5d44ba0 | 1432 | |
71552942 L |
1433 | switch (h->root.type) |
1434 | { | |
1435 | default: | |
1436 | abfd = NULL; | |
1437 | break; | |
1438 | ||
1439 | case bfd_link_hash_undefined: | |
1440 | case bfd_link_hash_undefweak: | |
1441 | abfd = h->root.u.undef.abfd; | |
4a43e768 AM |
1442 | if ((abfd->flags & DYNAMIC) == 0 |
1443 | || elf_dyn_lib_class (abfd) != DYN_DT_NEEDED) | |
71552942 L |
1444 | return FALSE; |
1445 | break; | |
1446 | ||
1447 | case bfd_link_hash_defined: | |
1448 | case bfd_link_hash_defweak: | |
1449 | abfd = h->root.u.def.section->owner; | |
1450 | break; | |
1451 | ||
1452 | case bfd_link_hash_common: | |
1453 | abfd = h->root.u.c.p->section->owner; | |
1454 | break; | |
1455 | } | |
1456 | BFD_ASSERT (abfd != NULL); | |
1457 | ||
f5d44ba0 AM |
1458 | for (loaded = elf_hash_table (info)->loaded; |
1459 | loaded != NULL; | |
1460 | loaded = loaded->next) | |
1461 | { | |
1462 | bfd *input; | |
1463 | Elf_Internal_Shdr *hdr; | |
1464 | bfd_size_type symcount; | |
1465 | bfd_size_type extsymcount; | |
1466 | bfd_size_type extsymoff; | |
1467 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
1468 | Elf_Internal_Sym *isym; |
1469 | Elf_Internal_Sym *isymend; | |
1470 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 1471 | Elf_External_Versym *ever; |
6cdc0ccc | 1472 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
1473 | |
1474 | input = loaded->abfd; | |
1475 | ||
1476 | /* We check each DSO for a possible hidden versioned definition. */ | |
71552942 | 1477 | if (input == abfd |
f5d44ba0 AM |
1478 | || (input->flags & DYNAMIC) == 0 |
1479 | || elf_dynversym (input) == 0) | |
1480 | continue; | |
1481 | ||
1482 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
1483 | ||
1484 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
1485 | if (elf_bad_symtab (input)) | |
1486 | { | |
1487 | extsymcount = symcount; | |
1488 | extsymoff = 0; | |
1489 | } | |
1490 | else | |
1491 | { | |
1492 | extsymcount = symcount - hdr->sh_info; | |
1493 | extsymoff = hdr->sh_info; | |
1494 | } | |
1495 | ||
1496 | if (extsymcount == 0) | |
1497 | continue; | |
1498 | ||
6cdc0ccc AM |
1499 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
1500 | NULL, NULL, NULL); | |
1501 | if (isymbuf == NULL) | |
b34976b6 | 1502 | return FALSE; |
f5d44ba0 | 1503 | |
f5d44ba0 AM |
1504 | /* Read in any version definitions. */ |
1505 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
268b6b39 | 1506 | extversym = bfd_malloc (versymhdr->sh_size); |
f5d44ba0 AM |
1507 | if (extversym == NULL) |
1508 | goto error_ret; | |
1509 | ||
1510 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 1511 | || (bfd_bread (extversym, versymhdr->sh_size, input) |
f5d44ba0 AM |
1512 | != versymhdr->sh_size)) |
1513 | { | |
1514 | free (extversym); | |
1515 | error_ret: | |
6cdc0ccc | 1516 | free (isymbuf); |
b34976b6 | 1517 | return FALSE; |
f5d44ba0 AM |
1518 | } |
1519 | ||
1520 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
1521 | isymend = isymbuf + extsymcount; |
1522 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
1523 | { |
1524 | const char *name; | |
f5d44ba0 | 1525 | Elf_Internal_Versym iver; |
a15d9d3a | 1526 | unsigned short version_index; |
f5d44ba0 | 1527 | |
6cdc0ccc AM |
1528 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
1529 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
1530 | continue; |
1531 | ||
1532 | name = bfd_elf_string_from_elf_section (input, | |
1533 | hdr->sh_link, | |
6cdc0ccc | 1534 | isym->st_name); |
f5d44ba0 AM |
1535 | if (strcmp (name, h->root.root.string) != 0) |
1536 | continue; | |
1537 | ||
1538 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
1539 | ||
1540 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
1541 | { | |
1542 | /* If we have a non-hidden versioned sym, then it should | |
1543 | have provided a definition for the undefined sym. */ | |
1544 | abort (); | |
1545 | } | |
1546 | ||
a15d9d3a L |
1547 | version_index = iver.vs_vers & VERSYM_VERSION; |
1548 | if (version_index == 1 || version_index == 2) | |
f5d44ba0 | 1549 | { |
a15d9d3a | 1550 | /* This is the base or first version. We can use it. */ |
f5d44ba0 | 1551 | free (extversym); |
6cdc0ccc | 1552 | free (isymbuf); |
b34976b6 | 1553 | return TRUE; |
f5d44ba0 AM |
1554 | } |
1555 | } | |
1556 | ||
1557 | free (extversym); | |
6cdc0ccc | 1558 | free (isymbuf); |
f5d44ba0 AM |
1559 | } |
1560 | ||
b34976b6 | 1561 | return FALSE; |
f5d44ba0 AM |
1562 | } |
1563 | ||
252b5132 RH |
1564 | /* Add an external symbol to the symbol table. This is called from |
1565 | the hash table traversal routine. When generating a shared object, | |
1566 | we go through the symbol table twice. The first time we output | |
1567 | anything that might have been forced to local scope in a version | |
1568 | script. The second time we output the symbols that are still | |
1569 | global symbols. */ | |
1570 | ||
b34976b6 | 1571 | static bfd_boolean |
268b6b39 | 1572 | elf_link_output_extsym (struct elf_link_hash_entry *h, void *data) |
252b5132 | 1573 | { |
268b6b39 | 1574 | struct elf_outext_info *eoinfo = data; |
252b5132 | 1575 | struct elf_final_link_info *finfo = eoinfo->finfo; |
b34976b6 | 1576 | bfd_boolean strip; |
252b5132 RH |
1577 | Elf_Internal_Sym sym; |
1578 | asection *input_sec; | |
1579 | ||
e92d460e AM |
1580 | if (h->root.type == bfd_link_hash_warning) |
1581 | { | |
1582 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1583 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 1584 | return TRUE; |
e92d460e AM |
1585 | } |
1586 | ||
252b5132 RH |
1587 | /* Decide whether to output this symbol in this pass. */ |
1588 | if (eoinfo->localsyms) | |
1589 | { | |
1590 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 1591 | return TRUE; |
252b5132 RH |
1592 | } |
1593 | else | |
1594 | { | |
1595 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 1596 | return TRUE; |
252b5132 RH |
1597 | } |
1598 | ||
560e09e9 NC |
1599 | /* If we have an undefined symbol reference here then it must have |
1600 | come from a shared library that is being linked in. (Undefined | |
1601 | references in regular files have already been handled). If we | |
1602 | are reporting errors for this situation then do so now. */ | |
1603 | if (h->root.type == bfd_link_hash_undefined | |
252b5132 | 1604 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 |
f5d44ba0 | 1605 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
560e09e9 NC |
1606 | && ! elf_link_check_versioned_symbol (finfo->info, h) |
1607 | && finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
252b5132 RH |
1608 | { |
1609 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
1610 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
560e09e9 | 1611 | NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR))) |
252b5132 | 1612 | { |
b34976b6 AM |
1613 | eoinfo->failed = TRUE; |
1614 | return FALSE; | |
252b5132 RH |
1615 | } |
1616 | } | |
1617 | ||
1b1fe8fe L |
1618 | /* We should also warn if a forced local symbol is referenced from |
1619 | shared libraries. */ | |
1049f94e | 1620 | if (! finfo->info->relocatable |
560e09e9 | 1621 | && (! finfo->info->shared) |
1b1fe8fe | 1622 | && (h->elf_link_hash_flags |
560e09e9 | 1623 | & (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_DYNAMIC_DEF | ELF_LINK_DYNAMIC_WEAK)) |
71552942 L |
1624 | == (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC) |
1625 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
1b1fe8fe L |
1626 | { |
1627 | (*_bfd_error_handler) | |
1628 | (_("%s: %s symbol `%s' in %s is referenced by DSO"), | |
1629 | bfd_get_filename (finfo->output_bfd), | |
1630 | ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
1631 | ? "internal" | |
1632 | : ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
1633 | ? "hidden" : "local", | |
1634 | h->root.root.string, | |
1635 | bfd_archive_filename (h->root.u.def.section->owner)); | |
1636 | eoinfo->failed = TRUE; | |
1637 | return FALSE; | |
1638 | } | |
1639 | ||
252b5132 RH |
1640 | /* We don't want to output symbols that have never been mentioned by |
1641 | a regular file, or that we have been told to strip. However, if | |
1642 | h->indx is set to -2, the symbol is used by a reloc and we must | |
1643 | output it. */ | |
1644 | if (h->indx == -2) | |
b34976b6 | 1645 | strip = FALSE; |
252b5132 RH |
1646 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
1647 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
1648 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1649 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 1650 | strip = TRUE; |
75828352 AM |
1651 | else if (finfo->info->strip == strip_all) |
1652 | strip = TRUE; | |
1653 | else if (finfo->info->strip == strip_some | |
1654 | && bfd_hash_lookup (finfo->info->keep_hash, | |
1655 | h->root.root.string, FALSE, FALSE) == NULL) | |
1656 | strip = TRUE; | |
1657 | else if (finfo->info->strip_discarded | |
1658 | && (h->root.type == bfd_link_hash_defined | |
1659 | || h->root.type == bfd_link_hash_defweak) | |
1660 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 1661 | strip = TRUE; |
252b5132 | 1662 | else |
b34976b6 | 1663 | strip = FALSE; |
252b5132 RH |
1664 | |
1665 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
1666 | nothing else to do unless it is a forced local symbol. */ |
1667 | if (strip | |
1668 | && h->dynindx == -1 | |
1669 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 1670 | return TRUE; |
252b5132 RH |
1671 | |
1672 | sym.st_value = 0; | |
1673 | sym.st_size = h->size; | |
1674 | sym.st_other = h->other; | |
1675 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
1676 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
1677 | else if (h->root.type == bfd_link_hash_undefweak | |
1678 | || h->root.type == bfd_link_hash_defweak) | |
1679 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
1680 | else | |
1681 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
1682 | ||
1683 | switch (h->root.type) | |
1684 | { | |
1685 | default: | |
1686 | case bfd_link_hash_new: | |
e92d460e | 1687 | case bfd_link_hash_warning: |
252b5132 | 1688 | abort (); |
b34976b6 | 1689 | return FALSE; |
252b5132 RH |
1690 | |
1691 | case bfd_link_hash_undefined: | |
252b5132 RH |
1692 | case bfd_link_hash_undefweak: |
1693 | input_sec = bfd_und_section_ptr; | |
1694 | sym.st_shndx = SHN_UNDEF; | |
1695 | break; | |
1696 | ||
1697 | case bfd_link_hash_defined: | |
1698 | case bfd_link_hash_defweak: | |
1699 | { | |
1700 | input_sec = h->root.u.def.section; | |
1701 | if (input_sec->output_section != NULL) | |
1702 | { | |
1703 | sym.st_shndx = | |
1704 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
1705 | input_sec->output_section); | |
9ad5cbcf | 1706 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
1707 | { |
1708 | (*_bfd_error_handler) | |
1709 | (_("%s: could not find output section %s for input section %s"), | |
1710 | bfd_get_filename (finfo->output_bfd), | |
1711 | input_sec->output_section->name, | |
1712 | input_sec->name); | |
b34976b6 AM |
1713 | eoinfo->failed = TRUE; |
1714 | return FALSE; | |
252b5132 RH |
1715 | } |
1716 | ||
1049f94e AM |
1717 | /* ELF symbols in relocatable files are section relative, |
1718 | but in nonrelocatable files they are virtual | |
252b5132 RH |
1719 | addresses. */ |
1720 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
1049f94e | 1721 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
1722 | { |
1723 | sym.st_value += input_sec->output_section->vma; | |
1724 | if (h->type == STT_TLS) | |
1725 | { | |
1726 | /* STT_TLS symbols are relative to PT_TLS segment | |
1727 | base. */ | |
e1918d23 AM |
1728 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
1729 | sym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
1730 | } |
1731 | } | |
252b5132 RH |
1732 | } |
1733 | else | |
1734 | { | |
1735 | BFD_ASSERT (input_sec->owner == NULL | |
1736 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
1737 | sym.st_shndx = SHN_UNDEF; | |
1738 | input_sec = bfd_und_section_ptr; | |
1739 | } | |
1740 | } | |
1741 | break; | |
1742 | ||
1743 | case bfd_link_hash_common: | |
1744 | input_sec = h->root.u.c.p->section; | |
1745 | sym.st_shndx = SHN_COMMON; | |
1746 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
1747 | break; | |
1748 | ||
1749 | case bfd_link_hash_indirect: | |
1750 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
1751 | to the decorated version of the name. For example, if the |
1752 | symbol foo@@GNU_1.2 is the default, which should be used when | |
1753 | foo is used with no version, then we add an indirect symbol | |
1754 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
1755 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 1756 | return TRUE; |
252b5132 RH |
1757 | } |
1758 | ||
1759 | /* Give the processor backend a chance to tweak the symbol value, | |
1760 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
1761 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
1762 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
1763 | if ((h->dynindx != -1 |
1764 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
ef5aade5 L |
1765 | && ((finfo->info->shared |
1766 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1767 | || h->root.type != bfd_link_hash_undefweak)) | |
c44233aa | 1768 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
252b5132 RH |
1769 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
1770 | { | |
9c5bfbb7 | 1771 | const struct elf_backend_data *bed; |
252b5132 RH |
1772 | |
1773 | bed = get_elf_backend_data (finfo->output_bfd); | |
1774 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
1775 | (finfo->output_bfd, finfo->info, h, &sym))) | |
1776 | { | |
b34976b6 AM |
1777 | eoinfo->failed = TRUE; |
1778 | return FALSE; | |
252b5132 RH |
1779 | } |
1780 | } | |
1781 | ||
1782 | /* If we are marking the symbol as undefined, and there are no | |
1783 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
1784 | mark the symbol as weak undefined; if there are non-weak |
1785 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
1786 | because it might not be marked as undefined until the |
1787 | finish_dynamic_symbol routine gets through with it. */ | |
1788 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 1789 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
1790 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
1791 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
1792 | { |
1793 | int bindtype; | |
1794 | ||
1795 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
1796 | bindtype = STB_GLOBAL; | |
1797 | else | |
1798 | bindtype = STB_WEAK; | |
1799 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
1800 | } | |
252b5132 | 1801 | |
1b1fe8fe L |
1802 | /* If a non-weak symbol with non-default visibility is not defined |
1803 | locally, it is a fatal error. */ | |
1049f94e | 1804 | if (! finfo->info->relocatable |
9c7a29a3 | 1805 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
1b1fe8fe | 1806 | && ELF_ST_BIND (sym.st_info) != STB_WEAK |
22d5e339 | 1807 | && h->root.type == bfd_link_hash_undefined |
2cd533b7 | 1808 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
1b1fe8fe L |
1809 | { |
1810 | (*_bfd_error_handler) | |
1811 | (_("%s: %s symbol `%s' isn't defined"), | |
1812 | bfd_get_filename (finfo->output_bfd), | |
1813 | ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED | |
1814 | ? "protected" | |
1815 | : ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL | |
1816 | ? "internal" : "hidden", | |
1817 | h->root.root.string); | |
1818 | eoinfo->failed = TRUE; | |
1819 | return FALSE; | |
1820 | } | |
32c092c3 | 1821 | |
252b5132 | 1822 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
1823 | there now. We already know the symbol index. We also fill in |
1824 | the entry in the .hash section. */ | |
252b5132 RH |
1825 | if (h->dynindx != -1 |
1826 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
1827 | { | |
1828 | size_t bucketcount; | |
1829 | size_t bucket; | |
c7ac6ff8 | 1830 | size_t hash_entry_size; |
252b5132 RH |
1831 | bfd_byte *bucketpos; |
1832 | bfd_vma chain; | |
dc810e39 | 1833 | Elf_External_Sym *esym; |
252b5132 RH |
1834 | |
1835 | sym.st_name = h->dynstr_index; | |
dc810e39 | 1836 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
268b6b39 | 1837 | elf_swap_symbol_out (finfo->output_bfd, &sym, esym, 0); |
252b5132 RH |
1838 | |
1839 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
1840 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 1841 | hash_entry_size |
c7ac6ff8 | 1842 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 1843 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
1844 | + (bucket + 2) * hash_entry_size); |
1845 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
268b6b39 | 1846 | bfd_put (8 * hash_entry_size, finfo->output_bfd, h->dynindx, bucketpos); |
c7ac6ff8 MM |
1847 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
1848 | ((bfd_byte *) finfo->hash_sec->contents | |
1849 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
1850 | |
1851 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
1852 | { | |
1853 | Elf_Internal_Versym iversym; | |
dc810e39 | 1854 | Elf_External_Versym *eversym; |
252b5132 RH |
1855 | |
1856 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1857 | { | |
1858 | if (h->verinfo.verdef == NULL) | |
1859 | iversym.vs_vers = 0; | |
1860 | else | |
1861 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
1862 | } | |
1863 | else | |
1864 | { | |
1865 | if (h->verinfo.vertree == NULL) | |
1866 | iversym.vs_vers = 1; | |
1867 | else | |
1868 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
1869 | } | |
1870 | ||
1871 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
1872 | iversym.vs_vers |= VERSYM_HIDDEN; | |
1873 | ||
dc810e39 AM |
1874 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
1875 | eversym += h->dynindx; | |
1876 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
1877 | } |
1878 | } | |
1879 | ||
1880 | /* If we're stripping it, then it was just a dynamic symbol, and | |
1881 | there's nothing else to do. */ | |
7330fb86 | 1882 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 1883 | return TRUE; |
252b5132 RH |
1884 | |
1885 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
1886 | ||
754021d0 | 1887 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec, h)) |
252b5132 | 1888 | { |
b34976b6 AM |
1889 | eoinfo->failed = TRUE; |
1890 | return FALSE; | |
252b5132 RH |
1891 | } |
1892 | ||
b34976b6 | 1893 | return TRUE; |
252b5132 RH |
1894 | } |
1895 | ||
1896 | /* Link an input file into the linker output file. This function | |
1897 | handles all the sections and relocations of the input file at once. | |
1898 | This is so that we only have to read the local symbols once, and | |
1899 | don't have to keep them in memory. */ | |
1900 | ||
b34976b6 | 1901 | static bfd_boolean |
268b6b39 | 1902 | elf_link_input_bfd (struct elf_final_link_info *finfo, bfd *input_bfd) |
252b5132 | 1903 | { |
b34976b6 | 1904 | bfd_boolean (*relocate_section) |
268b6b39 AM |
1905 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
1906 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
252b5132 RH |
1907 | bfd *output_bfd; |
1908 | Elf_Internal_Shdr *symtab_hdr; | |
1909 | size_t locsymcount; | |
1910 | size_t extsymoff; | |
6cdc0ccc | 1911 | Elf_Internal_Sym *isymbuf; |
252b5132 | 1912 | Elf_Internal_Sym *isym; |
6cdc0ccc | 1913 | Elf_Internal_Sym *isymend; |
252b5132 RH |
1914 | long *pindex; |
1915 | asection **ppsection; | |
1916 | asection *o; | |
9c5bfbb7 | 1917 | const struct elf_backend_data *bed; |
b34976b6 | 1918 | bfd_boolean emit_relocs; |
f8deed93 | 1919 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
1920 | |
1921 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
1922 | bed = get_elf_backend_data (output_bfd); |
1923 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
1924 | |
1925 | /* If this is a dynamic object, we don't want to do anything here: | |
1926 | we don't want the local symbols, and we don't want the section | |
1927 | contents. */ | |
1928 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 1929 | return TRUE; |
252b5132 | 1930 | |
1049f94e | 1931 | emit_relocs = (finfo->info->relocatable |
c44233aa AM |
1932 | || finfo->info->emitrelocations |
1933 | || bed->elf_backend_emit_relocs); | |
9317eacc | 1934 | |
252b5132 RH |
1935 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1936 | if (elf_bad_symtab (input_bfd)) | |
1937 | { | |
1938 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
1939 | extsymoff = 0; | |
1940 | } | |
1941 | else | |
1942 | { | |
1943 | locsymcount = symtab_hdr->sh_info; | |
1944 | extsymoff = symtab_hdr->sh_info; | |
1945 | } | |
1946 | ||
1947 | /* Read the local symbols. */ | |
6cdc0ccc AM |
1948 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1949 | if (isymbuf == NULL && locsymcount != 0) | |
1950 | { | |
1951 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
1952 | finfo->internal_syms, | |
1953 | finfo->external_syms, | |
1954 | finfo->locsym_shndx); | |
1955 | if (isymbuf == NULL) | |
b34976b6 | 1956 | return FALSE; |
252b5132 RH |
1957 | } |
1958 | ||
6cdc0ccc AM |
1959 | /* Find local symbol sections and adjust values of symbols in |
1960 | SEC_MERGE sections. Write out those local symbols we know are | |
1961 | going into the output file. */ | |
1962 | isymend = isymbuf + locsymcount; | |
1963 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
1964 | isym < isymend; | |
1965 | isym++, pindex++, ppsection++) | |
252b5132 RH |
1966 | { |
1967 | asection *isec; | |
1968 | const char *name; | |
1969 | Elf_Internal_Sym osym; | |
1970 | ||
252b5132 RH |
1971 | *pindex = -1; |
1972 | ||
1973 | if (elf_bad_symtab (input_bfd)) | |
1974 | { | |
1975 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
1976 | { | |
1977 | *ppsection = NULL; | |
1978 | continue; | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 1983 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
1984 | else if (isym->st_shndx < SHN_LORESERVE |
1985 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
1986 | { |
1987 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 | 1988 | if (isec |
68bfbfcc | 1989 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
1990 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
1991 | isym->st_value = | |
1992 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 1993 | elf_section_data (isec)->sec_info, |
268b6b39 | 1994 | isym->st_value, 0); |
f5fa8ca2 | 1995 | } |
252b5132 | 1996 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 1997 | isec = bfd_abs_section_ptr; |
252b5132 | 1998 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 1999 | isec = bfd_com_section_ptr; |
252b5132 RH |
2000 | else |
2001 | { | |
2002 | /* Who knows? */ | |
2003 | isec = NULL; | |
2004 | } | |
2005 | ||
2006 | *ppsection = isec; | |
2007 | ||
2008 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 2009 | if (ppsection == finfo->sections) |
252b5132 RH |
2010 | continue; |
2011 | ||
24376d1b AM |
2012 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
2013 | { | |
24376d1b AM |
2014 | /* We never output section symbols. Instead, we use the |
2015 | section symbol of the corresponding section in the output | |
2016 | file. */ | |
2017 | continue; | |
2018 | } | |
2019 | ||
252b5132 RH |
2020 | /* If we are stripping all symbols, we don't want to output this |
2021 | one. */ | |
2022 | if (finfo->info->strip == strip_all) | |
2023 | continue; | |
2024 | ||
252b5132 | 2025 | /* If we are discarding all local symbols, we don't want to |
1049f94e | 2026 | output this one. If we are generating a relocatable output |
252b5132 RH |
2027 | file, then some of the local symbols may be required by |
2028 | relocs; we output them below as we discover that they are | |
2029 | needed. */ | |
2030 | if (finfo->info->discard == discard_all) | |
2031 | continue; | |
2032 | ||
2033 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
2034 | discarding, we don't need to keep it, but note that |
2035 | linker_mark is only reliable for sections that have contents. | |
2036 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
2037 | as well as linker_mark. */ | |
9ad5cbcf | 2038 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
2039 | && isec != NULL |
2040 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
1049f94e | 2041 | || (! finfo->info->relocatable |
252b5132 RH |
2042 | && (isec->flags & SEC_EXCLUDE) != 0))) |
2043 | continue; | |
2044 | ||
2045 | /* Get the name of the symbol. */ | |
2046 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
2047 | isym->st_name); | |
2048 | if (name == NULL) | |
b34976b6 | 2049 | return FALSE; |
252b5132 RH |
2050 | |
2051 | /* See if we are discarding symbols with this name. */ | |
2052 | if ((finfo->info->strip == strip_some | |
b34976b6 | 2053 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 2054 | == NULL)) |
f5fa8ca2 | 2055 | || (((finfo->info->discard == discard_sec_merge |
1049f94e | 2056 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocatable) |
f5fa8ca2 | 2057 | || finfo->info->discard == discard_l) |
252b5132 RH |
2058 | && bfd_is_local_label_name (input_bfd, name))) |
2059 | continue; | |
2060 | ||
2061 | /* If we get here, we are going to output this symbol. */ | |
2062 | ||
2063 | osym = *isym; | |
2064 | ||
2065 | /* Adjust the section index for the output file. */ | |
2066 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
2067 | isec->output_section); | |
9ad5cbcf | 2068 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 2069 | return FALSE; |
252b5132 RH |
2070 | |
2071 | *pindex = bfd_get_symcount (output_bfd); | |
2072 | ||
1049f94e | 2073 | /* ELF symbols in relocatable files are section relative, but |
252b5132 RH |
2074 | in executable files they are virtual addresses. Note that |
2075 | this code assumes that all ELF sections have an associated | |
2076 | BFD section with a reasonable value for output_offset; below | |
2077 | we assume that they also have a reasonable value for | |
2078 | output_section. Any special sections must be set up to meet | |
2079 | these requirements. */ | |
2080 | osym.st_value += isec->output_offset; | |
1049f94e | 2081 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
2082 | { |
2083 | osym.st_value += isec->output_section->vma; | |
2084 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
2085 | { | |
2086 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
e1918d23 AM |
2087 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
2088 | osym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
2089 | } |
2090 | } | |
252b5132 | 2091 | |
754021d0 | 2092 | if (! elf_link_output_sym (finfo, name, &osym, isec, NULL)) |
b34976b6 | 2093 | return FALSE; |
252b5132 RH |
2094 | } |
2095 | ||
2096 | /* Relocate the contents of each section. */ | |
f8deed93 | 2097 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
2098 | for (o = input_bfd->sections; o != NULL; o = o->next) |
2099 | { | |
2100 | bfd_byte *contents; | |
2101 | ||
2102 | if (! o->linker_mark) | |
2103 | { | |
2104 | /* This section was omitted from the link. */ | |
2105 | continue; | |
2106 | } | |
2107 | ||
2108 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
2109 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
2110 | continue; | |
2111 | ||
2112 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
2113 | { | |
45d6a902 | 2114 | /* Section was created by _bfd_elf_link_create_dynamic_sections |
252b5132 RH |
2115 | or somesuch. */ |
2116 | continue; | |
2117 | } | |
2118 | ||
2119 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
2120 | relaxation routine. Note that o is a section in an input |
2121 | file, so the contents field will not have been set by any of | |
2122 | the routines which work on output files. */ | |
252b5132 RH |
2123 | if (elf_section_data (o)->this_hdr.contents != NULL) |
2124 | contents = elf_section_data (o)->this_hdr.contents; | |
2125 | else | |
2126 | { | |
2127 | contents = finfo->contents; | |
268b6b39 AM |
2128 | if (! bfd_get_section_contents (input_bfd, o, contents, 0, |
2129 | o->_raw_size)) | |
b34976b6 | 2130 | return FALSE; |
252b5132 RH |
2131 | } |
2132 | ||
2133 | if ((o->flags & SEC_RELOC) != 0) | |
2134 | { | |
2135 | Elf_Internal_Rela *internal_relocs; | |
2136 | ||
2137 | /* Get the swapped relocs. */ | |
45d6a902 AM |
2138 | internal_relocs |
2139 | = _bfd_elf_link_read_relocs (input_bfd, o, finfo->external_relocs, | |
2140 | finfo->internal_relocs, FALSE); | |
252b5132 RH |
2141 | if (internal_relocs == NULL |
2142 | && o->reloc_count > 0) | |
b34976b6 | 2143 | return FALSE; |
252b5132 | 2144 | |
ec338859 AM |
2145 | /* Run through the relocs looking for any against symbols |
2146 | from discarded sections and section symbols from | |
2147 | removed link-once sections. Complain about relocs | |
2148 | against discarded sections. Zero relocs against removed | |
f97b9cb8 L |
2149 | link-once sections. Preserve debug information as much |
2150 | as we can. */ | |
2151 | if (!elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
2152 | { |
2153 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 2154 | |
ec338859 AM |
2155 | rel = internal_relocs; |
2156 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
2157 | for ( ; rel < relend; rel++) | |
2158 | { | |
2159 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
f97b9cb8 | 2160 | asection *sec; |
ec338859 AM |
2161 | |
2162 | if (r_symndx >= locsymcount | |
2163 | || (elf_bad_symtab (input_bfd) | |
2164 | && finfo->sections[r_symndx] == NULL)) | |
2165 | { | |
2166 | struct elf_link_hash_entry *h; | |
2167 | ||
2168 | h = sym_hashes[r_symndx - extsymoff]; | |
2169 | while (h->root.type == bfd_link_hash_indirect | |
2170 | || h->root.type == bfd_link_hash_warning) | |
2171 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2172 | ||
2173 | /* Complain if the definition comes from a | |
2174 | discarded section. */ | |
f97b9cb8 | 2175 | sec = h->root.u.def.section; |
ec338859 AM |
2176 | if ((h->root.type == bfd_link_hash_defined |
2177 | || h->root.type == bfd_link_hash_defweak) | |
f97b9cb8 | 2178 | && elf_discarded_section (sec)) |
ec338859 | 2179 | { |
ec338859 AM |
2180 | if ((o->flags & SEC_DEBUGGING) != 0) |
2181 | { | |
45e9217a | 2182 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
2183 | /* Try to preserve debug information. */ |
2184 | if ((o->flags & SEC_DEBUGGING) != 0 | |
2185 | && sec->kept_section != NULL | |
6e35c4da | 2186 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
2187 | h->root.u.def.section |
2188 | = sec->kept_section; | |
2189 | else | |
2190 | memset (rel, 0, sizeof (*rel)); | |
ec338859 AM |
2191 | } |
2192 | else | |
6f6f27f8 L |
2193 | finfo->info->callbacks->error_handler |
2194 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
2195 | _("%T: discarded in section `%s' from %s\n"), | |
2196 | h->root.root.string, | |
2197 | h->root.root.string, | |
2198 | h->root.u.def.section->name, | |
2199 | bfd_archive_filename (h->root.u.def.section->owner)); | |
ec338859 AM |
2200 | } |
2201 | } | |
2202 | else | |
2203 | { | |
f97b9cb8 | 2204 | sec = finfo->sections[r_symndx]; |
50b4d486 | 2205 | |
ed4de5e2 | 2206 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 2207 | { |
ad43ed4c L |
2208 | if ((o->flags & SEC_DEBUGGING) != 0 |
2209 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 2210 | { |
45e9217a | 2211 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
2212 | /* Try to preserve debug information. */ |
2213 | if ((o->flags & SEC_DEBUGGING) != 0 | |
2214 | && sec->kept_section != NULL | |
6e35c4da | 2215 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
2216 | finfo->sections[r_symndx] |
2217 | = sec->kept_section; | |
2218 | else | |
2219 | { | |
2220 | rel->r_info | |
2221 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
2222 | rel->r_addend = 0; | |
2223 | } | |
f9f32305 AM |
2224 | } |
2225 | else | |
f9f32305 | 2226 | { |
6f6f27f8 L |
2227 | static int count; |
2228 | int ok; | |
2229 | char *buf; | |
2230 | ||
2231 | ok = asprintf (&buf, "local symbol %d", | |
2232 | count++); | |
2233 | if (ok <= 0) | |
2234 | buf = (char *) "local symbol"; | |
2235 | finfo->info->callbacks->error_handler | |
2236 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
2237 | _("%T: discarded in section `%s' from %s\n"), | |
2238 | buf, buf, sec->name, | |
2239 | bfd_archive_filename (input_bfd)); | |
2240 | if (ok != -1) | |
f9f32305 | 2241 | free (buf); |
ec338859 AM |
2242 | } |
2243 | } | |
2244 | } | |
2245 | } | |
2246 | } | |
50b4d486 | 2247 | |
252b5132 RH |
2248 | /* Relocate the section by invoking a back end routine. |
2249 | ||
2250 | The back end routine is responsible for adjusting the | |
2251 | section contents as necessary, and (if using Rela relocs | |
1049f94e | 2252 | and generating a relocatable output file) adjusting the |
252b5132 RH |
2253 | reloc addend as necessary. |
2254 | ||
2255 | The back end routine does not have to worry about setting | |
2256 | the reloc address or the reloc symbol index. | |
2257 | ||
2258 | The back end routine is given a pointer to the swapped in | |
2259 | internal symbols, and can access the hash table entries | |
2260 | for the external symbols via elf_sym_hashes (input_bfd). | |
2261 | ||
1049f94e | 2262 | When generating relocatable output, the back end routine |
252b5132 RH |
2263 | must handle STB_LOCAL/STT_SECTION symbols specially. The |
2264 | output symbol is going to be a section symbol | |
2265 | corresponding to the output section, which will require | |
2266 | the addend to be adjusted. */ | |
2267 | ||
2268 | if (! (*relocate_section) (output_bfd, finfo->info, | |
2269 | input_bfd, o, contents, | |
2270 | internal_relocs, | |
6cdc0ccc | 2271 | isymbuf, |
252b5132 | 2272 | finfo->sections)) |
b34976b6 | 2273 | return FALSE; |
252b5132 | 2274 | |
9317eacc | 2275 | if (emit_relocs) |
252b5132 RH |
2276 | { |
2277 | Elf_Internal_Rela *irela; | |
2278 | Elf_Internal_Rela *irelaend; | |
73722af0 | 2279 | bfd_vma last_offset; |
252b5132 | 2280 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 2281 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 2282 | unsigned int next_erel; |
b34976b6 | 2283 | bfd_boolean (*reloc_emitter) |
268b6b39 | 2284 | (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *); |
b34976b6 | 2285 | bfd_boolean rela_normal; |
b491616a AM |
2286 | |
2287 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
2288 | rela_normal = (bed->rela_normal | |
2289 | && (input_rel_hdr->sh_entsize | |
2290 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
2291 | |
2292 | /* Adjust the reloc addresses and symbol indices. */ | |
2293 | ||
2294 | irela = internal_relocs; | |
dc810e39 | 2295 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 2296 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
2297 | + elf_section_data (o->output_section)->rel_count |
2298 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 | 2299 | last_offset = o->output_offset; |
1049f94e | 2300 | if (!finfo->info->relocatable) |
73722af0 | 2301 | last_offset += o->output_section->vma; |
209f668e | 2302 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
2303 | { |
2304 | unsigned long r_symndx; | |
252b5132 | 2305 | asection *sec; |
fad2542d | 2306 | Elf_Internal_Sym sym; |
252b5132 | 2307 | |
209f668e NC |
2308 | if (next_erel == bed->s->int_rels_per_ext_rel) |
2309 | { | |
2310 | rel_hash++; | |
2311 | next_erel = 0; | |
2312 | } | |
2313 | ||
d6fe2dc1 AM |
2314 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
2315 | finfo->info, o, | |
2316 | irela->r_offset); | |
2317 | if (irela->r_offset >= (bfd_vma) -2) | |
2318 | { | |
73722af0 AM |
2319 | /* This is a reloc for a deleted entry or somesuch. |
2320 | Turn it into an R_*_NONE reloc, at the same | |
2321 | offset as the last reloc. elf_eh_frame.c and | |
2322 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 2323 | being ordered. */ |
73722af0 AM |
2324 | irela->r_offset = last_offset; |
2325 | irela->r_info = 0; | |
2326 | irela->r_addend = 0; | |
d6fe2dc1 AM |
2327 | continue; |
2328 | } | |
2329 | ||
252b5132 RH |
2330 | irela->r_offset += o->output_offset; |
2331 | ||
7ad34365 | 2332 | /* Relocs in an executable have to be virtual addresses. */ |
1049f94e | 2333 | if (!finfo->info->relocatable) |
7ad34365 NC |
2334 | irela->r_offset += o->output_section->vma; |
2335 | ||
73722af0 | 2336 | last_offset = irela->r_offset; |
252b5132 | 2337 | |
73722af0 AM |
2338 | r_symndx = ELF_R_SYM (irela->r_info); |
2339 | if (r_symndx == STN_UNDEF) | |
252b5132 RH |
2340 | continue; |
2341 | ||
2342 | if (r_symndx >= locsymcount | |
2343 | || (elf_bad_symtab (input_bfd) | |
2344 | && finfo->sections[r_symndx] == NULL)) | |
2345 | { | |
2346 | struct elf_link_hash_entry *rh; | |
209f668e | 2347 | unsigned long indx; |
252b5132 RH |
2348 | |
2349 | /* This is a reloc against a global symbol. We | |
2350 | have not yet output all the local symbols, so | |
2351 | we do not know the symbol index of any global | |
2352 | symbol. We set the rel_hash entry for this | |
2353 | reloc to point to the global hash table entry | |
2354 | for this symbol. The symbol index is then | |
2355 | set at the end of elf_bfd_final_link. */ | |
2356 | indx = r_symndx - extsymoff; | |
2357 | rh = elf_sym_hashes (input_bfd)[indx]; | |
2358 | while (rh->root.type == bfd_link_hash_indirect | |
2359 | || rh->root.type == bfd_link_hash_warning) | |
2360 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
2361 | ||
2362 | /* Setting the index to -2 tells | |
2363 | elf_link_output_extsym that this symbol is | |
2364 | used by a reloc. */ | |
2365 | BFD_ASSERT (rh->indx < 0); | |
2366 | rh->indx = -2; | |
2367 | ||
2368 | *rel_hash = rh; | |
2369 | ||
2370 | continue; | |
2371 | } | |
2372 | ||
3e932841 | 2373 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
2374 | |
2375 | *rel_hash = NULL; | |
fad2542d | 2376 | sym = isymbuf[r_symndx]; |
252b5132 | 2377 | sec = finfo->sections[r_symndx]; |
fad2542d | 2378 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
2379 | { |
2380 | /* I suppose the backend ought to fill in the | |
2381 | section of any STT_SECTION symbol against a | |
2382 | processor specific section. If we have | |
2383 | discarded a section, the output_section will | |
2384 | be the absolute section. */ | |
b491616a AM |
2385 | if (bfd_is_abs_section (sec) |
2386 | || (sec != NULL | |
2387 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
2388 | r_symndx = 0; |
2389 | else if (sec == NULL || sec->owner == NULL) | |
2390 | { | |
2391 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2392 | return FALSE; |
252b5132 RH |
2393 | } |
2394 | else | |
2395 | { | |
2396 | r_symndx = sec->output_section->target_index; | |
2397 | BFD_ASSERT (r_symndx != 0); | |
2398 | } | |
b491616a AM |
2399 | |
2400 | /* Adjust the addend according to where the | |
f5d44ba0 | 2401 | section winds up in the output section. */ |
b491616a AM |
2402 | if (rela_normal) |
2403 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
2404 | } |
2405 | else | |
2406 | { | |
2407 | if (finfo->indices[r_symndx] == -1) | |
2408 | { | |
dc810e39 | 2409 | unsigned long shlink; |
252b5132 RH |
2410 | const char *name; |
2411 | asection *osec; | |
2412 | ||
2413 | if (finfo->info->strip == strip_all) | |
2414 | { | |
2415 | /* You can't do ld -r -s. */ | |
2416 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 2417 | return FALSE; |
252b5132 RH |
2418 | } |
2419 | ||
2420 | /* This symbol was skipped earlier, but | |
2421 | since it is needed by a reloc, we | |
2422 | must output it now. */ | |
dc810e39 | 2423 | shlink = symtab_hdr->sh_link; |
a7b97311 | 2424 | name = (bfd_elf_string_from_elf_section |
fad2542d | 2425 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 2426 | if (name == NULL) |
b34976b6 | 2427 | return FALSE; |
252b5132 RH |
2428 | |
2429 | osec = sec->output_section; | |
fad2542d | 2430 | sym.st_shndx = |
252b5132 RH |
2431 | _bfd_elf_section_from_bfd_section (output_bfd, |
2432 | osec); | |
fad2542d | 2433 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 2434 | return FALSE; |
252b5132 | 2435 | |
fad2542d | 2436 | sym.st_value += sec->output_offset; |
1049f94e | 2437 | if (! finfo->info->relocatable) |
13ae64f3 | 2438 | { |
fad2542d AM |
2439 | sym.st_value += osec->vma; |
2440 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
2441 | { |
2442 | /* STT_TLS symbols are relative to PT_TLS | |
2443 | segment base. */ | |
e1918d23 AM |
2444 | BFD_ASSERT (elf_hash_table (finfo->info) |
2445 | ->tls_sec != NULL); | |
2446 | sym.st_value -= (elf_hash_table (finfo->info) | |
2447 | ->tls_sec->vma); | |
13ae64f3 JJ |
2448 | } |
2449 | } | |
252b5132 | 2450 | |
a7b97311 AM |
2451 | finfo->indices[r_symndx] |
2452 | = bfd_get_symcount (output_bfd); | |
252b5132 | 2453 | |
754021d0 AM |
2454 | if (! elf_link_output_sym (finfo, name, &sym, sec, |
2455 | NULL)) | |
b34976b6 | 2456 | return FALSE; |
252b5132 RH |
2457 | } |
2458 | ||
2459 | r_symndx = finfo->indices[r_symndx]; | |
2460 | } | |
2461 | ||
2462 | irela->r_info = ELF_R_INFO (r_symndx, | |
2463 | ELF_R_TYPE (irela->r_info)); | |
2464 | } | |
2465 | ||
2466 | /* Swap out the relocs. */ | |
c44233aa | 2467 | if (bed->elf_backend_emit_relocs |
1049f94e | 2468 | && !(finfo->info->relocatable |
a7b97311 | 2469 | || finfo->info->emitrelocations)) |
c44233aa AM |
2470 | reloc_emitter = bed->elf_backend_emit_relocs; |
2471 | else | |
45d6a902 | 2472 | reloc_emitter = _bfd_elf_link_output_relocs; |
9317eacc | 2473 | |
c89583f8 AM |
2474 | if (input_rel_hdr->sh_size != 0 |
2475 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
2476 | internal_relocs)) | |
b34976b6 | 2477 | return FALSE; |
9317eacc | 2478 | |
c89583f8 AM |
2479 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
2480 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
2481 | { |
2482 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 2483 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 2484 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 2485 | internal_relocs)) |
b34976b6 | 2486 | return FALSE; |
c44233aa | 2487 | } |
252b5132 RH |
2488 | } |
2489 | } | |
2490 | ||
2491 | /* Write out the modified section contents. */ | |
73d074b4 | 2492 | if (bed->elf_backend_write_section |
f9f32305 | 2493 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
2494 | { |
2495 | /* Section written out. */ | |
2496 | } | |
68bfbfcc | 2497 | else switch (o->sec_info_type) |
f5fa8ca2 | 2498 | { |
65765700 | 2499 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 2500 | if (! (_bfd_write_section_stabs |
65765700 JJ |
2501 | (output_bfd, |
2502 | &elf_hash_table (finfo->info)->stab_info, | |
2503 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 2504 | return FALSE; |
65765700 JJ |
2505 | break; |
2506 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
2507 | if (! _bfd_write_merged_section (output_bfd, o, |
2508 | elf_section_data (o)->sec_info)) | |
b34976b6 | 2509 | return FALSE; |
65765700 JJ |
2510 | break; |
2511 | case ELF_INFO_TYPE_EH_FRAME: | |
2512 | { | |
126495ed AM |
2513 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
2514 | o, contents)) | |
b34976b6 | 2515 | return FALSE; |
65765700 JJ |
2516 | } |
2517 | break; | |
2518 | default: | |
2519 | { | |
2520 | bfd_size_type sec_size; | |
2521 | ||
2522 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
2523 | if (! (o->flags & SEC_EXCLUDE) | |
2524 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
2525 | contents, | |
2526 | (file_ptr) o->output_offset, | |
2527 | sec_size)) | |
b34976b6 | 2528 | return FALSE; |
65765700 JJ |
2529 | } |
2530 | break; | |
252b5132 RH |
2531 | } |
2532 | } | |
2533 | ||
b34976b6 | 2534 | return TRUE; |
252b5132 RH |
2535 | } |
2536 | ||
2537 | /* Generate a reloc when linking an ELF file. This is a reloc | |
2538 | requested by the linker, and does come from any input file. This | |
2539 | is used to build constructor and destructor tables when linking | |
2540 | with -Ur. */ | |
2541 | ||
b34976b6 | 2542 | static bfd_boolean |
268b6b39 AM |
2543 | elf_reloc_link_order (bfd *output_bfd, |
2544 | struct bfd_link_info *info, | |
2545 | asection *output_section, | |
2546 | struct bfd_link_order *link_order) | |
252b5132 RH |
2547 | { |
2548 | reloc_howto_type *howto; | |
2549 | long indx; | |
2550 | bfd_vma offset; | |
2551 | bfd_vma addend; | |
2552 | struct elf_link_hash_entry **rel_hash_ptr; | |
2553 | Elf_Internal_Shdr *rel_hdr; | |
9c5bfbb7 | 2554 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
2555 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
2556 | bfd_byte *erel; | |
2557 | unsigned int i; | |
252b5132 RH |
2558 | |
2559 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
2560 | if (howto == NULL) | |
2561 | { | |
2562 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2563 | return FALSE; |
252b5132 RH |
2564 | } |
2565 | ||
2566 | addend = link_order->u.reloc.p->addend; | |
2567 | ||
2568 | /* Figure out the symbol index. */ | |
2569 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
2570 | + elf_section_data (output_section)->rel_count |
2571 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
2572 | if (link_order->type == bfd_section_reloc_link_order) |
2573 | { | |
2574 | indx = link_order->u.reloc.p->u.section->target_index; | |
2575 | BFD_ASSERT (indx != 0); | |
2576 | *rel_hash_ptr = NULL; | |
2577 | } | |
2578 | else | |
2579 | { | |
2580 | struct elf_link_hash_entry *h; | |
2581 | ||
2582 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 2583 | actually against the section. */ |
252b5132 RH |
2584 | h = ((struct elf_link_hash_entry *) |
2585 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
2586 | link_order->u.reloc.p->u.name, | |
b34976b6 | 2587 | FALSE, FALSE, TRUE)); |
252b5132 RH |
2588 | if (h != NULL |
2589 | && (h->root.type == bfd_link_hash_defined | |
2590 | || h->root.type == bfd_link_hash_defweak)) | |
2591 | { | |
2592 | asection *section; | |
2593 | ||
2594 | section = h->root.u.def.section; | |
2595 | indx = section->output_section->target_index; | |
2596 | *rel_hash_ptr = NULL; | |
2597 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
2598 | addend here, but in practice it has already been added |
2599 | because it was passed to constructor_callback. */ | |
252b5132 RH |
2600 | addend += section->output_section->vma + section->output_offset; |
2601 | } | |
2602 | else if (h != NULL) | |
2603 | { | |
2604 | /* Setting the index to -2 tells elf_link_output_extsym that | |
2605 | this symbol is used by a reloc. */ | |
2606 | h->indx = -2; | |
2607 | *rel_hash_ptr = h; | |
2608 | indx = 0; | |
2609 | } | |
2610 | else | |
2611 | { | |
2612 | if (! ((*info->callbacks->unattached_reloc) | |
268b6b39 | 2613 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) |
b34976b6 | 2614 | return FALSE; |
252b5132 RH |
2615 | indx = 0; |
2616 | } | |
2617 | } | |
2618 | ||
2619 | /* If this is an inplace reloc, we must write the addend into the | |
2620 | object file. */ | |
2621 | if (howto->partial_inplace && addend != 0) | |
2622 | { | |
2623 | bfd_size_type size; | |
2624 | bfd_reloc_status_type rstat; | |
2625 | bfd_byte *buf; | |
b34976b6 | 2626 | bfd_boolean ok; |
dc810e39 | 2627 | const char *sym_name; |
252b5132 RH |
2628 | |
2629 | size = bfd_get_reloc_size (howto); | |
268b6b39 AM |
2630 | buf = bfd_zmalloc (size); |
2631 | if (buf == NULL) | |
b34976b6 | 2632 | return FALSE; |
268b6b39 | 2633 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
252b5132 RH |
2634 | switch (rstat) |
2635 | { | |
2636 | case bfd_reloc_ok: | |
2637 | break; | |
dc810e39 | 2638 | |
252b5132 RH |
2639 | default: |
2640 | case bfd_reloc_outofrange: | |
2641 | abort (); | |
dc810e39 | 2642 | |
252b5132 | 2643 | case bfd_reloc_overflow: |
dc810e39 AM |
2644 | if (link_order->type == bfd_section_reloc_link_order) |
2645 | sym_name = bfd_section_name (output_bfd, | |
2646 | link_order->u.reloc.p->u.section); | |
2647 | else | |
2648 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 2649 | if (! ((*info->callbacks->reloc_overflow) |
268b6b39 | 2650 | (info, sym_name, howto->name, addend, NULL, NULL, 0))) |
252b5132 RH |
2651 | { |
2652 | free (buf); | |
b34976b6 | 2653 | return FALSE; |
252b5132 RH |
2654 | } |
2655 | break; | |
2656 | } | |
268b6b39 AM |
2657 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
2658 | link_order->offset, size); | |
252b5132 RH |
2659 | free (buf); |
2660 | if (! ok) | |
b34976b6 | 2661 | return FALSE; |
252b5132 RH |
2662 | } |
2663 | ||
2664 | /* The address of a reloc is relative to the section in a | |
1049f94e | 2665 | relocatable file, and is a virtual address in an executable |
252b5132 RH |
2666 | file. */ |
2667 | offset = link_order->offset; | |
1049f94e | 2668 | if (! info->relocatable) |
252b5132 RH |
2669 | offset += output_section->vma; |
2670 | ||
947216bf AM |
2671 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
2672 | { | |
2673 | irel[i].r_offset = offset; | |
2674 | irel[i].r_info = 0; | |
2675 | irel[i].r_addend = 0; | |
2676 | } | |
2677 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 2678 | |
947216bf AM |
2679 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
2680 | erel = rel_hdr->contents; | |
252b5132 RH |
2681 | if (rel_hdr->sh_type == SHT_REL) |
2682 | { | |
947216bf AM |
2683 | erel += (elf_section_data (output_section)->rel_count |
2684 | * sizeof (Elf_External_Rel)); | |
2685 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); | |
252b5132 RH |
2686 | } |
2687 | else | |
2688 | { | |
947216bf AM |
2689 | irel[0].r_addend = addend; |
2690 | erel += (elf_section_data (output_section)->rel_count | |
2691 | * sizeof (Elf_External_Rela)); | |
2692 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); | |
252b5132 RH |
2693 | } |
2694 | ||
0525d26e | 2695 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 2696 | |
b34976b6 | 2697 | return TRUE; |
252b5132 | 2698 | } |
252b5132 | 2699 | \f |
252b5132 RH |
2700 | /* Garbage collect unused sections. */ |
2701 | ||
b34976b6 | 2702 | static bfd_boolean elf_gc_sweep_symbol |
268b6b39 | 2703 | (struct elf_link_hash_entry *, void *); |
252b5132 | 2704 | |
b34976b6 | 2705 | static bfd_boolean elf_gc_allocate_got_offsets |
268b6b39 | 2706 | (struct elf_link_hash_entry *, void *); |
252b5132 RH |
2707 | |
2708 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
2709 | it and any sections in this section's group, and all the sections |
2710 | which define symbols to which it refers. */ | |
252b5132 | 2711 | |
b34976b6 | 2712 | typedef asection * (*gc_mark_hook_fn) |
268b6b39 AM |
2713 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
2714 | struct elf_link_hash_entry *, Elf_Internal_Sym *); | |
b34976b6 AM |
2715 | |
2716 | static bfd_boolean | |
268b6b39 AM |
2717 | elf_gc_mark (struct bfd_link_info *info, |
2718 | asection *sec, | |
2719 | gc_mark_hook_fn gc_mark_hook) | |
252b5132 | 2720 | { |
b34976b6 | 2721 | bfd_boolean ret; |
dbb410c3 | 2722 | asection *group_sec; |
252b5132 RH |
2723 | |
2724 | sec->gc_mark = 1; | |
2725 | ||
dbb410c3 AM |
2726 | /* Mark all the sections in the group. */ |
2727 | group_sec = elf_section_data (sec)->next_in_group; | |
2728 | if (group_sec && !group_sec->gc_mark) | |
2729 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 2730 | return FALSE; |
252b5132 | 2731 | |
dbb410c3 | 2732 | /* Look through the section relocs. */ |
b34976b6 | 2733 | ret = TRUE; |
252b5132 RH |
2734 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
2735 | { | |
2736 | Elf_Internal_Rela *relstart, *rel, *relend; | |
2737 | Elf_Internal_Shdr *symtab_hdr; | |
2738 | struct elf_link_hash_entry **sym_hashes; | |
2739 | size_t nlocsyms; | |
2740 | size_t extsymoff; | |
252b5132 | 2741 | bfd *input_bfd = sec->owner; |
9c5bfbb7 | 2742 | const struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 2743 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
2744 | |
2745 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2746 | sym_hashes = elf_sym_hashes (input_bfd); | |
2747 | ||
2748 | /* Read the local symbols. */ | |
2749 | if (elf_bad_symtab (input_bfd)) | |
2750 | { | |
2751 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 2752 | extsymoff = 0; |
252b5132 RH |
2753 | } |
2754 | else | |
2755 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 2756 | |
6cdc0ccc AM |
2757 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
2758 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 2759 | { |
6cdc0ccc AM |
2760 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
2761 | NULL, NULL, NULL); | |
2762 | if (isym == NULL) | |
b34976b6 | 2763 | return FALSE; |
9ad5cbcf AM |
2764 | } |
2765 | ||
252b5132 | 2766 | /* Read the relocations. */ |
268b6b39 | 2767 | relstart = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL, |
45d6a902 | 2768 | info->keep_memory); |
252b5132 RH |
2769 | if (relstart == NULL) |
2770 | { | |
b34976b6 | 2771 | ret = FALSE; |
252b5132 RH |
2772 | goto out1; |
2773 | } | |
c7ac6ff8 | 2774 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
2775 | |
2776 | for (rel = relstart; rel < relend; rel++) | |
2777 | { | |
2778 | unsigned long r_symndx; | |
2779 | asection *rsec; | |
2780 | struct elf_link_hash_entry *h; | |
252b5132 RH |
2781 | |
2782 | r_symndx = ELF_R_SYM (rel->r_info); | |
2783 | if (r_symndx == 0) | |
2784 | continue; | |
2785 | ||
6cdc0ccc AM |
2786 | if (r_symndx >= nlocsyms |
2787 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
2788 | { |
2789 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 2790 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
2791 | } |
2792 | else | |
2793 | { | |
6cdc0ccc | 2794 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
2795 | } |
2796 | ||
2797 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
2798 | { |
2799 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
2800 | rsec->gc_mark = 1; | |
2801 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
2802 | { | |
b34976b6 | 2803 | ret = FALSE; |
b91afed7 AM |
2804 | goto out2; |
2805 | } | |
2806 | } | |
252b5132 RH |
2807 | } |
2808 | ||
2809 | out2: | |
6cdc0ccc | 2810 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
2811 | free (relstart); |
2812 | out1: | |
6cdc0ccc AM |
2813 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
2814 | { | |
2815 | if (! info->keep_memory) | |
2816 | free (isym); | |
2817 | else | |
2818 | symtab_hdr->contents = (unsigned char *) isym; | |
2819 | } | |
252b5132 RH |
2820 | } |
2821 | ||
2822 | return ret; | |
2823 | } | |
2824 | ||
2825 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
2826 | ||
b34976b6 | 2827 | typedef bfd_boolean (*gc_sweep_hook_fn) |
268b6b39 | 2828 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
b34976b6 AM |
2829 | |
2830 | static bfd_boolean | |
268b6b39 | 2831 | elf_gc_sweep (struct bfd_link_info *info, gc_sweep_hook_fn gc_sweep_hook) |
252b5132 RH |
2832 | { |
2833 | bfd *sub; | |
2834 | ||
2835 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2836 | { | |
2837 | asection *o; | |
2838 | ||
f6af82bd AM |
2839 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
2840 | continue; | |
2841 | ||
252b5132 RH |
2842 | for (o = sub->sections; o != NULL; o = o->next) |
2843 | { | |
2844 | /* Keep special sections. Keep .debug sections. */ | |
2845 | if ((o->flags & SEC_LINKER_CREATED) | |
2846 | || (o->flags & SEC_DEBUGGING)) | |
2847 | o->gc_mark = 1; | |
2848 | ||
2849 | if (o->gc_mark) | |
2850 | continue; | |
2851 | ||
2852 | /* Skip sweeping sections already excluded. */ | |
2853 | if (o->flags & SEC_EXCLUDE) | |
2854 | continue; | |
2855 | ||
2856 | /* Since this is early in the link process, it is simple | |
2857 | to remove a section from the output. */ | |
2858 | o->flags |= SEC_EXCLUDE; | |
2859 | ||
2860 | /* But we also have to update some of the relocation | |
2861 | info we collected before. */ | |
2862 | if (gc_sweep_hook | |
2863 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
2864 | { | |
2865 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2866 | bfd_boolean r; |
252b5132 | 2867 | |
45d6a902 | 2868 | internal_relocs |
268b6b39 | 2869 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, |
45d6a902 | 2870 | info->keep_memory); |
252b5132 | 2871 | if (internal_relocs == NULL) |
b34976b6 | 2872 | return FALSE; |
252b5132 | 2873 | |
3e932841 | 2874 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 2875 | |
6cdc0ccc | 2876 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2877 | free (internal_relocs); |
2878 | ||
2879 | if (!r) | |
b34976b6 | 2880 | return FALSE; |
252b5132 RH |
2881 | } |
2882 | } | |
2883 | } | |
2884 | ||
2885 | /* Remove the symbols that were in the swept sections from the dynamic | |
2886 | symbol table. GCFIXME: Anyone know how to get them out of the | |
2887 | static symbol table as well? */ | |
2888 | { | |
2889 | int i = 0; | |
2890 | ||
268b6b39 | 2891 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, &i); |
252b5132 RH |
2892 | |
2893 | elf_hash_table (info)->dynsymcount = i; | |
2894 | } | |
2895 | ||
b34976b6 | 2896 | return TRUE; |
252b5132 RH |
2897 | } |
2898 | ||
2899 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
2900 | ||
b34976b6 | 2901 | static bfd_boolean |
268b6b39 | 2902 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *idxptr) |
252b5132 | 2903 | { |
268b6b39 | 2904 | int *idx = idxptr; |
252b5132 | 2905 | |
e92d460e AM |
2906 | if (h->root.type == bfd_link_hash_warning) |
2907 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2908 | ||
252b5132 RH |
2909 | if (h->dynindx != -1 |
2910 | && ((h->root.type != bfd_link_hash_defined | |
2911 | && h->root.type != bfd_link_hash_defweak) | |
2912 | || h->root.u.def.section->gc_mark)) | |
2913 | h->dynindx = (*idx)++; | |
2914 | ||
b34976b6 | 2915 | return TRUE; |
252b5132 RH |
2916 | } |
2917 | ||
4cc11e76 | 2918 | /* Propagate collected vtable information. This is called through |
252b5132 RH |
2919 | elf_link_hash_traverse. */ |
2920 | ||
b34976b6 | 2921 | static bfd_boolean |
268b6b39 | 2922 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) |
252b5132 | 2923 | { |
e92d460e AM |
2924 | if (h->root.type == bfd_link_hash_warning) |
2925 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2926 | ||
3e932841 | 2927 | /* Those that are not vtables. */ |
252b5132 | 2928 | if (h->vtable_parent == NULL) |
b34976b6 | 2929 | return TRUE; |
252b5132 RH |
2930 | |
2931 | /* Those vtables that do not have parents, we cannot merge. */ | |
2932 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 2933 | return TRUE; |
252b5132 RH |
2934 | |
2935 | /* If we've already been done, exit. */ | |
2936 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 2937 | return TRUE; |
252b5132 RH |
2938 | |
2939 | /* Make sure the parent's table is up to date. */ | |
2940 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
2941 | ||
2942 | if (h->vtable_entries_used == NULL) | |
2943 | { | |
2944 | /* None of this table's entries were referenced. Re-use the | |
2945 | parent's table. */ | |
2946 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
2947 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
2948 | } | |
2949 | else | |
2950 | { | |
2951 | size_t n; | |
b34976b6 | 2952 | bfd_boolean *cu, *pu; |
252b5132 RH |
2953 | |
2954 | /* Or the parent's entries into ours. */ | |
2955 | cu = h->vtable_entries_used; | |
b34976b6 | 2956 | cu[-1] = TRUE; |
252b5132 RH |
2957 | pu = h->vtable_parent->vtable_entries_used; |
2958 | if (pu != NULL) | |
2959 | { | |
9c5bfbb7 AM |
2960 | const struct elf_backend_data *bed; |
2961 | unsigned int log_file_align; | |
0d1ea5c0 | 2962 | |
9c5bfbb7 AM |
2963 | bed = get_elf_backend_data (h->root.u.def.section->owner); |
2964 | log_file_align = bed->s->log_file_align; | |
45d6a902 | 2965 | n = h->vtable_parent->vtable_entries_size >> log_file_align; |
374b596d | 2966 | while (n--) |
252b5132 | 2967 | { |
374b596d | 2968 | if (*pu) |
b34976b6 | 2969 | *cu = TRUE; |
374b596d NC |
2970 | pu++; |
2971 | cu++; | |
252b5132 RH |
2972 | } |
2973 | } | |
2974 | } | |
2975 | ||
b34976b6 | 2976 | return TRUE; |
252b5132 RH |
2977 | } |
2978 | ||
b34976b6 | 2979 | static bfd_boolean |
268b6b39 | 2980 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) |
252b5132 RH |
2981 | { |
2982 | asection *sec; | |
2983 | bfd_vma hstart, hend; | |
2984 | Elf_Internal_Rela *relstart, *relend, *rel; | |
9c5bfbb7 | 2985 | const struct elf_backend_data *bed; |
45d6a902 | 2986 | unsigned int log_file_align; |
252b5132 | 2987 | |
e92d460e AM |
2988 | if (h->root.type == bfd_link_hash_warning) |
2989 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2990 | ||
252b5132 RH |
2991 | /* Take care of both those symbols that do not describe vtables as |
2992 | well as those that are not loaded. */ | |
2993 | if (h->vtable_parent == NULL) | |
b34976b6 | 2994 | return TRUE; |
252b5132 RH |
2995 | |
2996 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2997 | || h->root.type == bfd_link_hash_defweak); | |
2998 | ||
2999 | sec = h->root.u.def.section; | |
3000 | hstart = h->root.u.def.value; | |
3001 | hend = hstart + h->size; | |
3002 | ||
268b6b39 | 3003 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); |
252b5132 | 3004 | if (!relstart) |
b34976b6 | 3005 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 3006 | bed = get_elf_backend_data (sec->owner); |
45d6a902 | 3007 | log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 3008 | |
c7ac6ff8 | 3009 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
3010 | |
3011 | for (rel = relstart; rel < relend; ++rel) | |
3012 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
3013 | { | |
3014 | /* If the entry is in use, do nothing. */ | |
3015 | if (h->vtable_entries_used | |
3016 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
3017 | { | |
45d6a902 | 3018 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; |
252b5132 RH |
3019 | if (h->vtable_entries_used[entry]) |
3020 | continue; | |
3021 | } | |
3022 | /* Otherwise, kill it. */ | |
3023 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
3024 | } | |
3025 | ||
b34976b6 | 3026 | return TRUE; |
252b5132 RH |
3027 | } |
3028 | ||
3029 | /* Do mark and sweep of unused sections. */ | |
3030 | ||
b34976b6 | 3031 | bfd_boolean |
268b6b39 | 3032 | elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 3033 | { |
b34976b6 | 3034 | bfd_boolean ok = TRUE; |
252b5132 RH |
3035 | bfd *sub; |
3036 | asection * (*gc_mark_hook) | |
268b6b39 AM |
3037 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
3038 | struct elf_link_hash_entry *h, Elf_Internal_Sym *); | |
252b5132 RH |
3039 | |
3040 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
0eddce27 AM |
3041 | || info->relocatable |
3042 | || info->emitrelocations | |
3043 | || !is_elf_hash_table (info->hash) | |
252b5132 | 3044 | || elf_hash_table (info)->dynamic_sections_created) |
2627de83 AM |
3045 | { |
3046 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
3047 | return TRUE; | |
3048 | } | |
252b5132 RH |
3049 | |
3050 | /* Apply transitive closure to the vtable entry usage info. */ | |
3051 | elf_link_hash_traverse (elf_hash_table (info), | |
3052 | elf_gc_propagate_vtable_entries_used, | |
268b6b39 | 3053 | &ok); |
252b5132 | 3054 | if (!ok) |
b34976b6 | 3055 | return FALSE; |
252b5132 RH |
3056 | |
3057 | /* Kill the vtable relocations that were not used. */ | |
3058 | elf_link_hash_traverse (elf_hash_table (info), | |
3059 | elf_gc_smash_unused_vtentry_relocs, | |
268b6b39 | 3060 | &ok); |
252b5132 | 3061 | if (!ok) |
b34976b6 | 3062 | return FALSE; |
252b5132 RH |
3063 | |
3064 | /* Grovel through relocs to find out who stays ... */ | |
3065 | ||
3066 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
3067 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3068 | { | |
3069 | asection *o; | |
f6af82bd AM |
3070 | |
3071 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
3072 | continue; | |
3073 | ||
252b5132 RH |
3074 | for (o = sub->sections; o != NULL; o = o->next) |
3075 | { | |
3076 | if (o->flags & SEC_KEEP) | |
c44233aa | 3077 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 3078 | return FALSE; |
252b5132 RH |
3079 | } |
3080 | } | |
3081 | ||
3082 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 3083 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 3084 | return FALSE; |
252b5132 | 3085 | |
b34976b6 | 3086 | return TRUE; |
252b5132 RH |
3087 | } |
3088 | \f | |
4cc11e76 | 3089 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ |
252b5132 | 3090 | |
b34976b6 | 3091 | bfd_boolean |
268b6b39 AM |
3092 | elf_gc_record_vtinherit (bfd *abfd, |
3093 | asection *sec, | |
3094 | struct elf_link_hash_entry *h, | |
3095 | bfd_vma offset) | |
252b5132 RH |
3096 | { |
3097 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
3098 | struct elf_link_hash_entry **search, *child; | |
3099 | bfd_size_type extsymcount; | |
3100 | ||
3101 | /* The sh_info field of the symtab header tells us where the | |
3102 | external symbols start. We don't care about the local symbols at | |
3103 | this point. */ | |
3104 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
3105 | if (!elf_bad_symtab (abfd)) | |
3106 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
3107 | ||
3108 | sym_hashes = elf_sym_hashes (abfd); | |
3109 | sym_hashes_end = sym_hashes + extsymcount; | |
3110 | ||
3111 | /* Hunt down the child symbol, which is in this section at the same | |
3112 | offset as the relocation. */ | |
3113 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
3114 | { | |
3115 | if ((child = *search) != NULL | |
3116 | && (child->root.type == bfd_link_hash_defined | |
3117 | || child->root.type == bfd_link_hash_defweak) | |
3118 | && child->root.u.def.section == sec | |
3119 | && child->root.u.def.value == offset) | |
3120 | goto win; | |
3121 | } | |
3122 | ||
3123 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 3124 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 3125 | (unsigned long) offset); |
252b5132 | 3126 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 3127 | return FALSE; |
252b5132 | 3128 | |
dc810e39 | 3129 | win: |
252b5132 RH |
3130 | if (!h) |
3131 | { | |
3132 | /* This *should* only be the absolute section. It could potentially | |
3133 | be that someone has defined a non-global vtable though, which | |
3134 | would be bad. It isn't worth paging in the local symbols to be | |
3135 | sure though; that case should simply be handled by the assembler. */ | |
3136 | ||
3137 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
3138 | } | |
3139 | else | |
3140 | child->vtable_parent = h; | |
3141 | ||
b34976b6 | 3142 | return TRUE; |
252b5132 RH |
3143 | } |
3144 | ||
4cc11e76 | 3145 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ |
252b5132 | 3146 | |
b34976b6 | 3147 | bfd_boolean |
268b6b39 AM |
3148 | elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, |
3149 | asection *sec ATTRIBUTE_UNUSED, | |
3150 | struct elf_link_hash_entry *h, | |
3151 | bfd_vma addend) | |
252b5132 | 3152 | { |
9c5bfbb7 | 3153 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
45d6a902 | 3154 | unsigned int log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 3155 | |
64c456e1 | 3156 | if (addend >= h->vtable_entries_size) |
252b5132 | 3157 | { |
64c456e1 | 3158 | size_t size, bytes, file_align; |
b34976b6 | 3159 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
3160 | |
3161 | /* While the symbol is undefined, we have to be prepared to handle | |
3162 | a zero size. */ | |
64c456e1 | 3163 | file_align = 1 << log_file_align; |
252b5132 | 3164 | if (h->root.type == bfd_link_hash_undefined) |
64c456e1 | 3165 | size = addend + file_align; |
252b5132 RH |
3166 | else |
3167 | { | |
3168 | size = h->size; | |
64c456e1 | 3169 | if (addend >= size) |
252b5132 RH |
3170 | { |
3171 | /* Oops! We've got a reference past the defined end of | |
3172 | the table. This is probably a bug -- shall we warn? */ | |
64c456e1 | 3173 | size = addend + file_align; |
252b5132 RH |
3174 | } |
3175 | } | |
64c456e1 | 3176 | size = (size + file_align - 1) & -file_align; |
252b5132 RH |
3177 | |
3178 | /* Allocate one extra entry for use as a "done" flag for the | |
64c456e1 AM |
3179 | consolidation pass. */ |
3180 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
252b5132 RH |
3181 | |
3182 | if (ptr) | |
3183 | { | |
268b6b39 | 3184 | ptr = bfd_realloc (ptr - 1, bytes); |
3e932841 | 3185 | |
fed79cc6 NC |
3186 | if (ptr != NULL) |
3187 | { | |
3188 | size_t oldbytes; | |
252b5132 | 3189 | |
45d6a902 | 3190 | oldbytes = (((h->vtable_entries_size >> log_file_align) + 1) |
b34976b6 | 3191 | * sizeof (bfd_boolean)); |
a7b97311 | 3192 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 3193 | } |
252b5132 RH |
3194 | } |
3195 | else | |
268b6b39 | 3196 | ptr = bfd_zmalloc (bytes); |
252b5132 | 3197 | |
fed79cc6 | 3198 | if (ptr == NULL) |
b34976b6 | 3199 | return FALSE; |
3e932841 | 3200 | |
252b5132 | 3201 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 3202 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
3203 | h->vtable_entries_size = size; |
3204 | } | |
3e932841 | 3205 | |
45d6a902 | 3206 | h->vtable_entries_used[addend >> log_file_align] = TRUE; |
252b5132 | 3207 | |
b34976b6 | 3208 | return TRUE; |
252b5132 RH |
3209 | } |
3210 | ||
3211 | /* And an accompanying bit to work out final got entry offsets once | |
3212 | we're done. Should be called from final_link. */ | |
3213 | ||
b34976b6 | 3214 | bfd_boolean |
268b6b39 AM |
3215 | elf_gc_common_finalize_got_offsets (bfd *abfd, |
3216 | struct bfd_link_info *info) | |
252b5132 RH |
3217 | { |
3218 | bfd *i; | |
9c5bfbb7 | 3219 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
3220 | bfd_vma gotoff; |
3221 | ||
0eddce27 AM |
3222 | if (! is_elf_hash_table (info->hash)) |
3223 | return FALSE; | |
3224 | ||
252b5132 RH |
3225 | /* The GOT offset is relative to the .got section, but the GOT header is |
3226 | put into the .got.plt section, if the backend uses it. */ | |
3227 | if (bed->want_got_plt) | |
3228 | gotoff = 0; | |
3229 | else | |
3230 | gotoff = bed->got_header_size; | |
3231 | ||
3232 | /* Do the local .got entries first. */ | |
3233 | for (i = info->input_bfds; i; i = i->link_next) | |
3234 | { | |
f6af82bd | 3235 | bfd_signed_vma *local_got; |
252b5132 RH |
3236 | bfd_size_type j, locsymcount; |
3237 | Elf_Internal_Shdr *symtab_hdr; | |
3238 | ||
f6af82bd AM |
3239 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
3240 | continue; | |
3241 | ||
3242 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
3243 | if (!local_got) |
3244 | continue; | |
3245 | ||
3246 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
3247 | if (elf_bad_symtab (i)) | |
3248 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
3249 | else | |
3250 | locsymcount = symtab_hdr->sh_info; | |
3251 | ||
3252 | for (j = 0; j < locsymcount; ++j) | |
3253 | { | |
3254 | if (local_got[j] > 0) | |
3255 | { | |
3256 | local_got[j] = gotoff; | |
3257 | gotoff += ARCH_SIZE / 8; | |
3258 | } | |
3259 | else | |
3260 | local_got[j] = (bfd_vma) -1; | |
3261 | } | |
3262 | } | |
3263 | ||
dd5724d5 AM |
3264 | /* Then the global .got entries. .plt refcounts are handled by |
3265 | adjust_dynamic_symbol */ | |
252b5132 RH |
3266 | elf_link_hash_traverse (elf_hash_table (info), |
3267 | elf_gc_allocate_got_offsets, | |
268b6b39 | 3268 | &gotoff); |
b34976b6 | 3269 | return TRUE; |
252b5132 RH |
3270 | } |
3271 | ||
3272 | /* We need a special top-level link routine to convert got reference counts | |
3273 | to real got offsets. */ | |
3274 | ||
b34976b6 | 3275 | static bfd_boolean |
268b6b39 | 3276 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *offarg) |
252b5132 | 3277 | { |
268b6b39 | 3278 | bfd_vma *off = offarg; |
252b5132 | 3279 | |
e92d460e AM |
3280 | if (h->root.type == bfd_link_hash_warning) |
3281 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3282 | ||
252b5132 RH |
3283 | if (h->got.refcount > 0) |
3284 | { | |
3285 | h->got.offset = off[0]; | |
3286 | off[0] += ARCH_SIZE / 8; | |
3287 | } | |
3288 | else | |
3289 | h->got.offset = (bfd_vma) -1; | |
3290 | ||
b34976b6 | 3291 | return TRUE; |
252b5132 RH |
3292 | } |
3293 | ||
3294 | /* Many folk need no more in the way of final link than this, once | |
3295 | got entry reference counting is enabled. */ | |
3296 | ||
b34976b6 | 3297 | bfd_boolean |
268b6b39 | 3298 | elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
3299 | { |
3300 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 3301 | return FALSE; |
252b5132 RH |
3302 | |
3303 | /* Invoke the regular ELF backend linker to do all the work. */ | |
3304 | return elf_bfd_final_link (abfd, info); | |
3305 | } | |
3306 | ||
b34976b6 | 3307 | bfd_boolean |
268b6b39 | 3308 | elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) |
73d074b4 | 3309 | { |
268b6b39 | 3310 | struct elf_reloc_cookie *rcookie = cookie; |
73d074b4 DJ |
3311 | |
3312 | if (rcookie->bad_symtab) | |
3313 | rcookie->rel = rcookie->rels; | |
3314 | ||
3315 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
3316 | { | |
d6fe2dc1 | 3317 | unsigned long r_symndx; |
73d074b4 DJ |
3318 | |
3319 | if (! rcookie->bad_symtab) | |
3320 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 3321 | return FALSE; |
73d074b4 DJ |
3322 | if (rcookie->rel->r_offset != offset) |
3323 | continue; | |
3324 | ||
d6fe2dc1 AM |
3325 | r_symndx = ELF_R_SYM (rcookie->rel->r_info); |
3326 | if (r_symndx == SHN_UNDEF) | |
b34976b6 | 3327 | return TRUE; |
d6fe2dc1 | 3328 | |
73d074b4 | 3329 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 3330 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
3331 | { |
3332 | struct elf_link_hash_entry *h; | |
3333 | ||
3334 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
3335 | ||
3336 | while (h->root.type == bfd_link_hash_indirect | |
3337 | || h->root.type == bfd_link_hash_warning) | |
3338 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3339 | ||
3340 | if ((h->root.type == bfd_link_hash_defined | |
3341 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 3342 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 3343 | return TRUE; |
73d074b4 | 3344 | else |
b34976b6 | 3345 | return FALSE; |
73d074b4 | 3346 | } |
6cdc0ccc | 3347 | else |
73d074b4 DJ |
3348 | { |
3349 | /* It's not a relocation against a global symbol, | |
44421011 | 3350 | but it could be a relocation against a local |
73d074b4 DJ |
3351 | symbol for a discarded section. */ |
3352 | asection *isec; | |
6cdc0ccc | 3353 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
3354 | |
3355 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
3356 | isym = &rcookie->locsyms[r_symndx]; |
3357 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 3358 | { |
6cdc0ccc | 3359 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 3360 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 3361 | return TRUE; |
73d074b4 DJ |
3362 | } |
3363 | } | |
b34976b6 | 3364 | return FALSE; |
73d074b4 | 3365 | } |
b34976b6 | 3366 | return FALSE; |
73d074b4 DJ |
3367 | } |
3368 | ||
3369 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 3370 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 3371 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 3372 | which is true for all known assemblers. */ |
73d074b4 | 3373 | |
b34976b6 | 3374 | bfd_boolean |
268b6b39 | 3375 | elf_bfd_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
73d074b4 DJ |
3376 | { |
3377 | struct elf_reloc_cookie cookie; | |
126495ed | 3378 | asection *stab, *eh; |
73d074b4 | 3379 | Elf_Internal_Shdr *symtab_hdr; |
9c5bfbb7 | 3380 | const struct elf_backend_data *bed; |
73d074b4 | 3381 | bfd *abfd; |
99eb2ac8 | 3382 | unsigned int count; |
b34976b6 | 3383 | bfd_boolean ret = FALSE; |
73d074b4 | 3384 | |
d6fe2dc1 | 3385 | if (info->traditional_format |
0eddce27 | 3386 | || !is_elf_hash_table (info->hash)) |
b34976b6 | 3387 | return FALSE; |
65765700 | 3388 | |
73d074b4 DJ |
3389 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
3390 | { | |
163c1c30 L |
3391 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
3392 | continue; | |
3393 | ||
73d074b4 DJ |
3394 | bed = get_elf_backend_data (abfd); |
3395 | ||
3396 | if ((abfd->flags & DYNAMIC) != 0) | |
3397 | continue; | |
3398 | ||
126495ed | 3399 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
1049f94e | 3400 | if (info->relocatable |
2d36fe5f AH |
3401 | || (eh != NULL |
3402 | && (eh->_raw_size == 0 | |
3403 | || bfd_is_abs_section (eh->output_section)))) | |
126495ed | 3404 | eh = NULL; |
65765700 | 3405 | |
99eb2ac8 AM |
3406 | stab = bfd_get_section_by_name (abfd, ".stab"); |
3407 | if (stab != NULL | |
3408 | && (stab->_raw_size == 0 | |
3409 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 3410 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
3411 | stab = NULL; |
3412 | ||
3413 | if (stab == NULL | |
3414 | && eh == NULL | |
3415 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
3416 | continue; |
3417 | ||
3418 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
3419 | cookie.abfd = abfd; |
3420 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
3421 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
3422 | if (cookie.bad_symtab) | |
3423 | { | |
99eb2ac8 | 3424 | cookie.locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); |
73d074b4 DJ |
3425 | cookie.extsymoff = 0; |
3426 | } | |
3427 | else | |
3428 | { | |
3429 | cookie.locsymcount = symtab_hdr->sh_info; | |
3430 | cookie.extsymoff = symtab_hdr->sh_info; | |
3431 | } | |
3432 | ||
6cdc0ccc AM |
3433 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
3434 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 3435 | { |
6cdc0ccc AM |
3436 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
3437 | cookie.locsymcount, 0, | |
3438 | NULL, NULL, NULL); | |
c44233aa | 3439 | if (cookie.locsyms == NULL) |
b34976b6 | 3440 | return FALSE; |
9ad5cbcf | 3441 | } |
73d074b4 | 3442 | |
99eb2ac8 | 3443 | if (stab != NULL) |
73d074b4 | 3444 | { |
99eb2ac8 AM |
3445 | cookie.rels = NULL; |
3446 | count = stab->reloc_count; | |
3447 | if (count != 0) | |
268b6b39 AM |
3448 | cookie.rels = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL, |
3449 | info->keep_memory); | |
99eb2ac8 | 3450 | if (cookie.rels != NULL) |
73d074b4 DJ |
3451 | { |
3452 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
3453 | cookie.relend = cookie.rels; |
3454 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
3455 | if (_bfd_discard_section_stabs (abfd, stab, |
3456 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
3457 | elf_reloc_symbol_deleted_p, |
3458 | &cookie)) | |
b34976b6 | 3459 | ret = TRUE; |
6cdc0ccc | 3460 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
3461 | free (cookie.rels); |
3462 | } | |
3463 | } | |
3464 | ||
99eb2ac8 | 3465 | if (eh != NULL) |
65765700 JJ |
3466 | { |
3467 | cookie.rels = NULL; | |
99eb2ac8 AM |
3468 | count = eh->reloc_count; |
3469 | if (count != 0) | |
268b6b39 AM |
3470 | cookie.rels = _bfd_elf_link_read_relocs (abfd, eh, NULL, NULL, |
3471 | info->keep_memory); | |
99eb2ac8 AM |
3472 | cookie.rel = cookie.rels; |
3473 | cookie.relend = cookie.rels; | |
3474 | if (cookie.rels != NULL) | |
3475 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
3476 | ||
126495ed | 3477 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
3478 | elf_reloc_symbol_deleted_p, |
3479 | &cookie)) | |
b34976b6 | 3480 | ret = TRUE; |
99eb2ac8 AM |
3481 | |
3482 | if (cookie.rels != NULL | |
3483 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
3484 | free (cookie.rels); |
3485 | } | |
3486 | ||
99eb2ac8 AM |
3487 | if (bed->elf_backend_discard_info != NULL |
3488 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 3489 | ret = TRUE; |
73d074b4 | 3490 | |
6cdc0ccc AM |
3491 | if (cookie.locsyms != NULL |
3492 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
3493 | { | |
3494 | if (! info->keep_memory) | |
3495 | free (cookie.locsyms); | |
3496 | else | |
3497 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
3498 | } | |
73d074b4 | 3499 | } |
65765700 | 3500 | |
126495ed | 3501 | if (info->eh_frame_hdr |
1049f94e | 3502 | && !info->relocatable |
126495ed | 3503 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
b34976b6 | 3504 | ret = TRUE; |
99eb2ac8 | 3505 | |
73d074b4 DJ |
3506 | return ret; |
3507 | } | |
3508 | ||
b34976b6 | 3509 | static bfd_boolean |
268b6b39 | 3510 | elf_section_ignore_discarded_relocs (asection *sec) |
73d074b4 | 3511 | { |
9c5bfbb7 | 3512 | const struct elf_backend_data *bed; |
40b829d4 | 3513 | |
68bfbfcc | 3514 | switch (sec->sec_info_type) |
65765700 JJ |
3515 | { |
3516 | case ELF_INFO_TYPE_STABS: | |
3517 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 3518 | return TRUE; |
65765700 JJ |
3519 | default: |
3520 | break; | |
3521 | } | |
40b829d4 AM |
3522 | |
3523 | bed = get_elf_backend_data (sec->owner); | |
3524 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
3525 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 3526 | return TRUE; |
65765700 | 3527 | |
b34976b6 | 3528 | return FALSE; |
73d074b4 | 3529 | } |