Commit | Line | Data |
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8afe83be | 1 | /* ELF linker support. |
56f3b62c | 2 | Copyright 1995, 1996, 1997 Free Software Foundation, Inc. |
8afe83be KR |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
943fbd5b | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
452a5efb | 19 | |
ede4eed4 KR |
20 | /* ELF linker code. */ |
21 | ||
22 | static boolean elf_link_add_object_symbols | |
23 | PARAMS ((bfd *, struct bfd_link_info *)); | |
24 | static boolean elf_link_add_archive_symbols | |
25 | PARAMS ((bfd *, struct bfd_link_info *)); | |
ede4eed4 KR |
26 | static boolean elf_export_symbol |
27 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
28 | static boolean elf_adjust_dynamic_symbol | |
29 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
d044b40a ILT |
30 | static boolean elf_link_find_version_dependencies |
31 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
32 | static boolean elf_link_find_version_dependencies | |
33 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
34 | static boolean elf_link_assign_sym_version | |
35 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
36 | static boolean elf_link_renumber_dynsyms | |
37 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
ede4eed4 KR |
38 | |
39 | /* This struct is used to pass information to routines called via | |
40 | elf_link_hash_traverse which must return failure. */ | |
41 | ||
42 | struct elf_info_failed | |
43 | { | |
44 | boolean failed; | |
45 | struct bfd_link_info *info; | |
ff12f303 | 46 | }; |
ede4eed4 KR |
47 | |
48 | /* Given an ELF BFD, add symbols to the global hash table as | |
49 | appropriate. */ | |
50 | ||
51 | boolean | |
52 | elf_bfd_link_add_symbols (abfd, info) | |
53 | bfd *abfd; | |
54 | struct bfd_link_info *info; | |
55 | { | |
ede4eed4 KR |
56 | switch (bfd_get_format (abfd)) |
57 | { | |
58 | case bfd_object: | |
59 | return elf_link_add_object_symbols (abfd, info); | |
60 | case bfd_archive: | |
ede4eed4 KR |
61 | return elf_link_add_archive_symbols (abfd, info); |
62 | default: | |
63 | bfd_set_error (bfd_error_wrong_format); | |
64 | return false; | |
65 | } | |
66 | } | |
3b3753b8 | 67 | \f |
ede4eed4 KR |
68 | |
69 | /* Add symbols from an ELF archive file to the linker hash table. We | |
70 | don't use _bfd_generic_link_add_archive_symbols because of a | |
71 | problem which arises on UnixWare. The UnixWare libc.so is an | |
72 | archive which includes an entry libc.so.1 which defines a bunch of | |
73 | symbols. The libc.so archive also includes a number of other | |
74 | object files, which also define symbols, some of which are the same | |
75 | as those defined in libc.so.1. Correct linking requires that we | |
76 | consider each object file in turn, and include it if it defines any | |
77 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
78 | this; it looks through the list of undefined symbols, and includes | |
79 | any object file which defines them. When this algorithm is used on | |
80 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
81 | bunch of symbols. This means that some of the other objects in the | |
82 | archive are not included in the link, which is incorrect since they | |
83 | precede libc.so.1 in the archive. | |
84 | ||
85 | Fortunately, ELF archive handling is simpler than that done by | |
86 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
87 | oddities. In ELF, if we find a symbol in the archive map, and the | |
88 | symbol is currently undefined, we know that we must pull in that | |
89 | object file. | |
90 | ||
91 | Unfortunately, we do have to make multiple passes over the symbol | |
92 | table until nothing further is resolved. */ | |
93 | ||
94 | static boolean | |
95 | elf_link_add_archive_symbols (abfd, info) | |
96 | bfd *abfd; | |
97 | struct bfd_link_info *info; | |
98 | { | |
99 | symindex c; | |
100 | boolean *defined = NULL; | |
101 | boolean *included = NULL; | |
102 | carsym *symdefs; | |
103 | boolean loop; | |
104 | ||
105 | if (! bfd_has_map (abfd)) | |
106 | { | |
107 | /* An empty archive is a special case. */ | |
108 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
109 | return true; | |
110 | bfd_set_error (bfd_error_no_armap); | |
111 | return false; | |
112 | } | |
113 | ||
114 | /* Keep track of all symbols we know to be already defined, and all | |
115 | files we know to be already included. This is to speed up the | |
116 | second and subsequent passes. */ | |
117 | c = bfd_ardata (abfd)->symdef_count; | |
118 | if (c == 0) | |
119 | return true; | |
58142f10 ILT |
120 | defined = (boolean *) bfd_malloc (c * sizeof (boolean)); |
121 | included = (boolean *) bfd_malloc (c * sizeof (boolean)); | |
ede4eed4 | 122 | if (defined == (boolean *) NULL || included == (boolean *) NULL) |
58142f10 | 123 | goto error_return; |
ede4eed4 KR |
124 | memset (defined, 0, c * sizeof (boolean)); |
125 | memset (included, 0, c * sizeof (boolean)); | |
126 | ||
127 | symdefs = bfd_ardata (abfd)->symdefs; | |
128 | ||
129 | do | |
130 | { | |
131 | file_ptr last; | |
132 | symindex i; | |
133 | carsym *symdef; | |
134 | carsym *symdefend; | |
135 | ||
136 | loop = false; | |
137 | last = -1; | |
138 | ||
139 | symdef = symdefs; | |
140 | symdefend = symdef + c; | |
141 | for (i = 0; symdef < symdefend; symdef++, i++) | |
142 | { | |
143 | struct elf_link_hash_entry *h; | |
144 | bfd *element; | |
145 | struct bfd_link_hash_entry *undefs_tail; | |
146 | symindex mark; | |
147 | ||
148 | if (defined[i] || included[i]) | |
149 | continue; | |
150 | if (symdef->file_offset == last) | |
151 | { | |
152 | included[i] = true; | |
153 | continue; | |
154 | } | |
155 | ||
156 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
157 | false, false, false); | |
d044b40a ILT |
158 | |
159 | if (h == NULL) | |
160 | { | |
161 | char *p, *copy; | |
162 | ||
163 | /* If this is a default version (the name contains @@), | |
164 | look up the symbol again without the version. The | |
165 | effect is that references to the symbol without the | |
166 | version will be matched by the default symbol in the | |
167 | archive. */ | |
168 | ||
169 | p = strchr (symdef->name, ELF_VER_CHR); | |
170 | if (p == NULL || p[1] != ELF_VER_CHR) | |
171 | continue; | |
172 | ||
173 | copy = bfd_alloc (abfd, p - symdef->name + 1); | |
174 | if (copy == NULL) | |
175 | goto error_return; | |
176 | memcpy (copy, symdef->name, p - symdef->name); | |
177 | copy[p - symdef->name] = '\0'; | |
178 | ||
179 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
180 | false, false, false); | |
181 | ||
182 | bfd_release (abfd, copy); | |
183 | } | |
184 | ||
185 | if (h == NULL) | |
ede4eed4 | 186 | continue; |
d044b40a | 187 | |
ede4eed4 KR |
188 | if (h->root.type != bfd_link_hash_undefined) |
189 | { | |
68807a39 ILT |
190 | if (h->root.type != bfd_link_hash_undefweak) |
191 | defined[i] = true; | |
ede4eed4 KR |
192 | continue; |
193 | } | |
194 | ||
195 | /* We need to include this archive member. */ | |
196 | ||
197 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
198 | if (element == (bfd *) NULL) | |
199 | goto error_return; | |
200 | ||
201 | if (! bfd_check_format (element, bfd_object)) | |
202 | goto error_return; | |
203 | ||
204 | /* Doublecheck that we have not included this object | |
205 | already--it should be impossible, but there may be | |
206 | something wrong with the archive. */ | |
207 | if (element->archive_pass != 0) | |
208 | { | |
209 | bfd_set_error (bfd_error_bad_value); | |
210 | goto error_return; | |
211 | } | |
212 | element->archive_pass = 1; | |
213 | ||
214 | undefs_tail = info->hash->undefs_tail; | |
215 | ||
216 | if (! (*info->callbacks->add_archive_element) (info, element, | |
217 | symdef->name)) | |
218 | goto error_return; | |
219 | if (! elf_link_add_object_symbols (element, info)) | |
220 | goto error_return; | |
221 | ||
222 | /* If there are any new undefined symbols, we need to make | |
223 | another pass through the archive in order to see whether | |
224 | they can be defined. FIXME: This isn't perfect, because | |
225 | common symbols wind up on undefs_tail and because an | |
226 | undefined symbol which is defined later on in this pass | |
227 | does not require another pass. This isn't a bug, but it | |
228 | does make the code less efficient than it could be. */ | |
229 | if (undefs_tail != info->hash->undefs_tail) | |
230 | loop = true; | |
231 | ||
232 | /* Look backward to mark all symbols from this object file | |
233 | which we have already seen in this pass. */ | |
234 | mark = i; | |
235 | do | |
236 | { | |
237 | included[mark] = true; | |
238 | if (mark == 0) | |
239 | break; | |
240 | --mark; | |
241 | } | |
242 | while (symdefs[mark].file_offset == symdef->file_offset); | |
243 | ||
244 | /* We mark subsequent symbols from this object file as we go | |
245 | on through the loop. */ | |
246 | last = symdef->file_offset; | |
247 | } | |
248 | } | |
249 | while (loop); | |
250 | ||
251 | free (defined); | |
252 | free (included); | |
253 | ||
254 | return true; | |
255 | ||
256 | error_return: | |
257 | if (defined != (boolean *) NULL) | |
258 | free (defined); | |
259 | if (included != (boolean *) NULL) | |
260 | free (included); | |
261 | return false; | |
262 | } | |
263 | ||
264 | /* Add symbols from an ELF object file to the linker hash table. */ | |
265 | ||
266 | static boolean | |
267 | elf_link_add_object_symbols (abfd, info) | |
268 | bfd *abfd; | |
269 | struct bfd_link_info *info; | |
270 | { | |
271 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
272 | const Elf_Internal_Sym *, | |
273 | const char **, flagword *, | |
274 | asection **, bfd_vma *)); | |
275 | boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *, | |
276 | asection *, const Elf_Internal_Rela *)); | |
277 | boolean collect; | |
278 | Elf_Internal_Shdr *hdr; | |
279 | size_t symcount; | |
280 | size_t extsymcount; | |
281 | size_t extsymoff; | |
282 | Elf_External_Sym *buf = NULL; | |
283 | struct elf_link_hash_entry **sym_hash; | |
284 | boolean dynamic; | |
d044b40a ILT |
285 | bfd_byte *dynver = NULL; |
286 | Elf_External_Versym *extversym = NULL; | |
287 | Elf_External_Versym *ever; | |
ede4eed4 KR |
288 | Elf_External_Dyn *dynbuf = NULL; |
289 | struct elf_link_hash_entry *weaks; | |
290 | Elf_External_Sym *esym; | |
291 | Elf_External_Sym *esymend; | |
292 | ||
293 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
294 | collect = get_elf_backend_data (abfd)->collect; | |
295 | ||
d044b40a ILT |
296 | if ((abfd->flags & DYNAMIC) == 0) |
297 | dynamic = false; | |
298 | else | |
299 | { | |
300 | dynamic = true; | |
301 | ||
302 | /* You can't use -r against a dynamic object. Also, there's no | |
303 | hope of using a dynamic object which does not exactly match | |
304 | the format of the output file. */ | |
305 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
306 | { | |
307 | bfd_set_error (bfd_error_invalid_operation); | |
308 | goto error_return; | |
309 | } | |
310 | } | |
311 | ||
0cb70568 ILT |
312 | /* As a GNU extension, any input sections which are named |
313 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
314 | symbol. This differs from .gnu.warning sections, which generate | |
315 | warnings when they are included in an output file. */ | |
316 | if (! info->shared) | |
317 | { | |
318 | asection *s; | |
319 | ||
320 | for (s = abfd->sections; s != NULL; s = s->next) | |
321 | { | |
322 | const char *name; | |
323 | ||
324 | name = bfd_get_section_name (abfd, s); | |
325 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
326 | { | |
327 | char *msg; | |
328 | bfd_size_type sz; | |
329 | ||
54626f1a ILT |
330 | name += sizeof ".gnu.warning." - 1; |
331 | ||
332 | /* If this is a shared object, then look up the symbol | |
333 | in the hash table. If it is there, and it is already | |
334 | been defined, then we will not be using the entry | |
335 | from this shared object, so we don't need to warn. | |
336 | FIXME: If we see the definition in a regular object | |
337 | later on, we will warn, but we shouldn't. The only | |
338 | fix is to keep track of what warnings we are supposed | |
339 | to emit, and then handle them all at the end of the | |
340 | link. */ | |
d044b40a | 341 | if (dynamic && abfd->xvec == info->hash->creator) |
54626f1a ILT |
342 | { |
343 | struct elf_link_hash_entry *h; | |
344 | ||
345 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
346 | false, false, true); | |
347 | ||
348 | /* FIXME: What about bfd_link_hash_common? */ | |
349 | if (h != NULL | |
350 | && (h->root.type == bfd_link_hash_defined | |
351 | || h->root.type == bfd_link_hash_defweak)) | |
352 | { | |
353 | /* We don't want to issue this warning. Clobber | |
354 | the section size so that the warning does not | |
355 | get copied into the output file. */ | |
356 | s->_raw_size = 0; | |
357 | continue; | |
358 | } | |
359 | } | |
360 | ||
0cb70568 ILT |
361 | sz = bfd_section_size (abfd, s); |
362 | msg = (char *) bfd_alloc (abfd, sz); | |
363 | if (msg == NULL) | |
a9713b91 | 364 | goto error_return; |
0cb70568 ILT |
365 | |
366 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
367 | goto error_return; | |
368 | ||
369 | if (! (_bfd_generic_link_add_one_symbol | |
54626f1a ILT |
370 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, |
371 | false, collect, (struct bfd_link_hash_entry **) NULL))) | |
0cb70568 ILT |
372 | goto error_return; |
373 | ||
374 | if (! info->relocateable) | |
375 | { | |
376 | /* Clobber the section size so that the warning does | |
377 | not get copied into the output file. */ | |
378 | s->_raw_size = 0; | |
379 | } | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
d044b40a ILT |
384 | /* If this is a dynamic object, we always link against the .dynsym |
385 | symbol table, not the .symtab symbol table. The dynamic linker | |
386 | will only see the .dynsym symbol table, so there is no reason to | |
387 | look at .symtab for a dynamic object. */ | |
388 | ||
389 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
390 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
391 | else | |
392 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
393 | ||
394 | if (dynamic) | |
ede4eed4 | 395 | { |
d044b40a ILT |
396 | /* Read in any version definitions. */ |
397 | ||
398 | if (elf_dynverdef (abfd) != 0) | |
399 | { | |
400 | Elf_Internal_Shdr *verdefhdr; | |
401 | bfd_byte *dynver; | |
402 | int i; | |
403 | const Elf_External_Verdef *extverdef; | |
404 | Elf_Internal_Verdef *intverdef; | |
405 | ||
406 | verdefhdr = &elf_tdata (abfd)->dynverdef_hdr; | |
407 | elf_tdata (abfd)->verdef = | |
408 | ((Elf_Internal_Verdef *) | |
409 | bfd_zalloc (abfd, | |
410 | verdefhdr->sh_info * sizeof (Elf_Internal_Verdef))); | |
411 | if (elf_tdata (abfd)->verdef == NULL) | |
412 | goto error_return; | |
413 | ||
414 | dynver = (bfd_byte *) bfd_malloc (verdefhdr->sh_size); | |
415 | if (dynver == NULL) | |
416 | goto error_return; | |
417 | ||
418 | if (bfd_seek (abfd, verdefhdr->sh_offset, SEEK_SET) != 0 | |
d2f0374f UD |
419 | || (bfd_read ((PTR) dynver, 1, verdefhdr->sh_size, abfd) |
420 | != verdefhdr->sh_size)) | |
d044b40a ILT |
421 | goto error_return; |
422 | ||
423 | extverdef = (const Elf_External_Verdef *) dynver; | |
424 | intverdef = elf_tdata (abfd)->verdef; | |
425 | for (i = 0; i < verdefhdr->sh_info; i++, intverdef++) | |
426 | { | |
427 | const Elf_External_Verdaux *extverdaux; | |
428 | Elf_Internal_Verdaux intverdaux; | |
429 | ||
430 | _bfd_elf_swap_verdef_in (abfd, extverdef, intverdef); | |
431 | ||
432 | /* Pick up the name of the version. */ | |
433 | extverdaux = ((const Elf_External_Verdaux *) | |
d2f0374f | 434 | ((bfd_byte *) extverdef + intverdef->vd_aux)); |
d044b40a ILT |
435 | _bfd_elf_swap_verdaux_in (abfd, extverdaux, &intverdaux); |
436 | ||
437 | intverdef->vd_bfd = abfd; | |
438 | intverdef->vd_nodename = | |
439 | bfd_elf_string_from_elf_section (abfd, verdefhdr->sh_link, | |
440 | intverdaux.vda_name); | |
441 | ||
442 | extverdef = ((const Elf_External_Verdef *) | |
d2f0374f | 443 | ((bfd_byte *) extverdef + intverdef->vd_next)); |
d044b40a ILT |
444 | } |
445 | ||
446 | free (dynver); | |
447 | dynver = NULL; | |
448 | } | |
449 | ||
450 | /* Read in the symbol versions, but don't bother to convert them | |
451 | to internal format. */ | |
452 | if (elf_dynversym (abfd) != 0) | |
453 | { | |
454 | Elf_Internal_Shdr *versymhdr; | |
455 | ||
456 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
457 | extversym = (Elf_External_Versym *) bfd_malloc (hdr->sh_size); | |
458 | if (extversym == NULL) | |
459 | goto error_return; | |
460 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
461 | || (bfd_read ((PTR) extversym, 1, versymhdr->sh_size, abfd) | |
462 | != versymhdr->sh_size)) | |
463 | goto error_return; | |
464 | } | |
ede4eed4 KR |
465 | } |
466 | ||
ede4eed4 KR |
467 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
468 | ||
469 | /* The sh_info field of the symtab header tells us where the | |
470 | external symbols start. We don't care about the local symbols at | |
471 | this point. */ | |
472 | if (elf_bad_symtab (abfd)) | |
473 | { | |
474 | extsymcount = symcount; | |
475 | extsymoff = 0; | |
476 | } | |
477 | else | |
478 | { | |
479 | extsymcount = symcount - hdr->sh_info; | |
480 | extsymoff = hdr->sh_info; | |
481 | } | |
482 | ||
58142f10 ILT |
483 | buf = ((Elf_External_Sym *) |
484 | bfd_malloc (extsymcount * sizeof (Elf_External_Sym))); | |
ede4eed4 | 485 | if (buf == NULL && extsymcount != 0) |
58142f10 | 486 | goto error_return; |
ede4eed4 KR |
487 | |
488 | /* We store a pointer to the hash table entry for each external | |
489 | symbol. */ | |
490 | sym_hash = ((struct elf_link_hash_entry **) | |
491 | bfd_alloc (abfd, | |
492 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
493 | if (sym_hash == NULL) | |
a9713b91 | 494 | goto error_return; |
ede4eed4 KR |
495 | elf_sym_hashes (abfd) = sym_hash; |
496 | ||
d044b40a | 497 | if (! dynamic) |
ede4eed4 | 498 | { |
ede4eed4 KR |
499 | /* If we are creating a shared library, create all the dynamic |
500 | sections immediately. We need to attach them to something, | |
501 | so we attach them to this BFD, provided it is the right | |
502 | format. FIXME: If there are no input BFD's of the same | |
503 | format as the output, we can't make a shared library. */ | |
504 | if (info->shared | |
505 | && ! elf_hash_table (info)->dynamic_sections_created | |
506 | && abfd->xvec == info->hash->creator) | |
507 | { | |
508 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
509 | goto error_return; | |
510 | } | |
511 | } | |
512 | else | |
513 | { | |
514 | asection *s; | |
515 | boolean add_needed; | |
516 | const char *name; | |
517 | bfd_size_type oldsize; | |
518 | bfd_size_type strindex; | |
519 | ||
ede4eed4 KR |
520 | /* Find the name to use in a DT_NEEDED entry that refers to this |
521 | object. If the object has a DT_SONAME entry, we use it. | |
522 | Otherwise, if the generic linker stuck something in | |
60a49e7f ILT |
523 | elf_dt_name, we use that. Otherwise, we just use the file |
524 | name. If the generic linker put a null string into | |
525 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
526 | there is a DT_SONAME entry. */ | |
ede4eed4 KR |
527 | add_needed = true; |
528 | name = bfd_get_filename (abfd); | |
60a49e7f | 529 | if (elf_dt_name (abfd) != NULL) |
ede4eed4 | 530 | { |
60a49e7f | 531 | name = elf_dt_name (abfd); |
ede4eed4 KR |
532 | if (*name == '\0') |
533 | add_needed = false; | |
534 | } | |
535 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
536 | if (s != NULL) | |
537 | { | |
538 | Elf_External_Dyn *extdyn; | |
539 | Elf_External_Dyn *extdynend; | |
540 | int elfsec; | |
541 | unsigned long link; | |
542 | ||
58142f10 | 543 | dynbuf = (Elf_External_Dyn *) bfd_malloc ((size_t) s->_raw_size); |
ede4eed4 | 544 | if (dynbuf == NULL) |
58142f10 | 545 | goto error_return; |
ede4eed4 KR |
546 | |
547 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
548 | (file_ptr) 0, s->_raw_size)) | |
549 | goto error_return; | |
550 | ||
551 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
552 | if (elfsec == -1) | |
553 | goto error_return; | |
554 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
555 | ||
556 | extdyn = dynbuf; | |
557 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
558 | for (; extdyn < extdynend; extdyn++) | |
559 | { | |
560 | Elf_Internal_Dyn dyn; | |
561 | ||
562 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
60a49e7f | 563 | if (dyn.d_tag == DT_SONAME) |
ede4eed4 KR |
564 | { |
565 | name = bfd_elf_string_from_elf_section (abfd, link, | |
566 | dyn.d_un.d_val); | |
567 | if (name == NULL) | |
568 | goto error_return; | |
569 | } | |
570 | if (dyn.d_tag == DT_NEEDED) | |
571 | { | |
54406786 | 572 | struct bfd_link_needed_list *n, **pn; |
ede4eed4 KR |
573 | char *fnm, *anm; |
574 | ||
54406786 ILT |
575 | n = ((struct bfd_link_needed_list *) |
576 | bfd_alloc (abfd, sizeof (struct bfd_link_needed_list))); | |
ede4eed4 KR |
577 | fnm = bfd_elf_string_from_elf_section (abfd, link, |
578 | dyn.d_un.d_val); | |
579 | if (n == NULL || fnm == NULL) | |
580 | goto error_return; | |
581 | anm = bfd_alloc (abfd, strlen (fnm) + 1); | |
582 | if (anm == NULL) | |
583 | goto error_return; | |
584 | strcpy (anm, fnm); | |
585 | n->name = anm; | |
586 | n->by = abfd; | |
587 | n->next = NULL; | |
588 | for (pn = &elf_hash_table (info)->needed; | |
589 | *pn != NULL; | |
590 | pn = &(*pn)->next) | |
591 | ; | |
592 | *pn = n; | |
593 | } | |
594 | } | |
595 | ||
596 | free (dynbuf); | |
597 | dynbuf = NULL; | |
598 | } | |
599 | ||
600 | /* We do not want to include any of the sections in a dynamic | |
601 | object in the output file. We hack by simply clobbering the | |
602 | list of sections in the BFD. This could be handled more | |
603 | cleanly by, say, a new section flag; the existing | |
604 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
605 | still implies that the section takes up space in the output | |
606 | file. */ | |
607 | abfd->sections = NULL; | |
010d9f2d | 608 | abfd->section_count = 0; |
ede4eed4 KR |
609 | |
610 | /* If this is the first dynamic object found in the link, create | |
611 | the special sections required for dynamic linking. */ | |
612 | if (! elf_hash_table (info)->dynamic_sections_created) | |
613 | { | |
614 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
615 | goto error_return; | |
616 | } | |
617 | ||
618 | if (add_needed) | |
619 | { | |
620 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
621 | oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
622 | strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name, | |
623 | true, false); | |
624 | if (strindex == (bfd_size_type) -1) | |
625 | goto error_return; | |
626 | ||
627 | if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr)) | |
628 | { | |
629 | asection *sdyn; | |
630 | Elf_External_Dyn *dyncon, *dynconend; | |
631 | ||
632 | /* The hash table size did not change, which means that | |
633 | the dynamic object name was already entered. If we | |
634 | have already included this dynamic object in the | |
635 | link, just ignore it. There is no reason to include | |
636 | a particular dynamic object more than once. */ | |
637 | sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
638 | ".dynamic"); | |
639 | BFD_ASSERT (sdyn != NULL); | |
640 | ||
641 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
642 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
643 | sdyn->_raw_size); | |
644 | for (; dyncon < dynconend; dyncon++) | |
645 | { | |
646 | Elf_Internal_Dyn dyn; | |
647 | ||
648 | elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon, | |
649 | &dyn); | |
650 | if (dyn.d_tag == DT_NEEDED | |
651 | && dyn.d_un.d_val == strindex) | |
652 | { | |
653 | if (buf != NULL) | |
654 | free (buf); | |
d044b40a ILT |
655 | if (extversym != NULL) |
656 | free (extversym); | |
ede4eed4 KR |
657 | return true; |
658 | } | |
659 | } | |
660 | } | |
661 | ||
662 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
663 | goto error_return; | |
664 | } | |
60a49e7f ILT |
665 | |
666 | /* Save the SONAME, if there is one, because sometimes the | |
667 | linker emulation code will need to know it. */ | |
668 | if (*name == '\0') | |
669 | name = bfd_get_filename (abfd); | |
670 | elf_dt_name (abfd) = name; | |
ede4eed4 KR |
671 | } |
672 | ||
673 | if (bfd_seek (abfd, | |
674 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), | |
675 | SEEK_SET) != 0 | |
676 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
677 | != extsymcount * sizeof (Elf_External_Sym))) | |
678 | goto error_return; | |
679 | ||
680 | weaks = NULL; | |
681 | ||
e549b1d2 | 682 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
ede4eed4 | 683 | esymend = buf + extsymcount; |
d044b40a ILT |
684 | for (esym = buf; |
685 | esym < esymend; | |
686 | esym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
ede4eed4 KR |
687 | { |
688 | Elf_Internal_Sym sym; | |
689 | int bind; | |
690 | bfd_vma value; | |
691 | asection *sec; | |
692 | flagword flags; | |
693 | const char *name; | |
0cb70568 | 694 | struct elf_link_hash_entry *h; |
ede4eed4 | 695 | boolean definition; |
ee9f09cd | 696 | boolean size_change_ok, type_change_ok; |
452a5efb | 697 | boolean new_weakdef; |
fd6c00ba | 698 | unsigned int old_alignment; |
ede4eed4 KR |
699 | |
700 | elf_swap_symbol_in (abfd, esym, &sym); | |
701 | ||
702 | flags = BSF_NO_FLAGS; | |
703 | sec = NULL; | |
704 | value = sym.st_value; | |
705 | *sym_hash = NULL; | |
706 | ||
707 | bind = ELF_ST_BIND (sym.st_info); | |
708 | if (bind == STB_LOCAL) | |
709 | { | |
710 | /* This should be impossible, since ELF requires that all | |
711 | global symbols follow all local symbols, and that sh_info | |
712 | point to the first global symbol. Unfortunatealy, Irix 5 | |
713 | screws this up. */ | |
714 | continue; | |
715 | } | |
716 | else if (bind == STB_GLOBAL) | |
717 | { | |
718 | if (sym.st_shndx != SHN_UNDEF | |
719 | && sym.st_shndx != SHN_COMMON) | |
720 | flags = BSF_GLOBAL; | |
721 | else | |
722 | flags = 0; | |
723 | } | |
724 | else if (bind == STB_WEAK) | |
725 | flags = BSF_WEAK; | |
726 | else | |
727 | { | |
728 | /* Leave it up to the processor backend. */ | |
729 | } | |
730 | ||
731 | if (sym.st_shndx == SHN_UNDEF) | |
732 | sec = bfd_und_section_ptr; | |
733 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) | |
734 | { | |
735 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
f02004e9 | 736 | if (sec == NULL) |
ede4eed4 | 737 | sec = bfd_abs_section_ptr; |
f02004e9 ILT |
738 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
739 | value -= sec->vma; | |
ede4eed4 KR |
740 | } |
741 | else if (sym.st_shndx == SHN_ABS) | |
742 | sec = bfd_abs_section_ptr; | |
743 | else if (sym.st_shndx == SHN_COMMON) | |
744 | { | |
745 | sec = bfd_com_section_ptr; | |
746 | /* What ELF calls the size we call the value. What ELF | |
747 | calls the value we call the alignment. */ | |
748 | value = sym.st_size; | |
749 | } | |
750 | else | |
751 | { | |
752 | /* Leave it up to the processor backend. */ | |
753 | } | |
754 | ||
755 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
756 | if (name == (const char *) NULL) | |
757 | goto error_return; | |
758 | ||
759 | if (add_symbol_hook) | |
760 | { | |
761 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
762 | &value)) | |
763 | goto error_return; | |
764 | ||
765 | /* The hook function sets the name to NULL if this symbol | |
766 | should be skipped for some reason. */ | |
767 | if (name == (const char *) NULL) | |
768 | continue; | |
769 | } | |
770 | ||
771 | /* Sanity check that all possibilities were handled. */ | |
772 | if (sec == (asection *) NULL) | |
773 | { | |
774 | bfd_set_error (bfd_error_bad_value); | |
775 | goto error_return; | |
776 | } | |
777 | ||
778 | if (bfd_is_und_section (sec) | |
779 | || bfd_is_com_section (sec)) | |
780 | definition = false; | |
781 | else | |
782 | definition = true; | |
783 | ||
ee9f09cd | 784 | size_change_ok = false; |
5b3b9ff6 | 785 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
fd6c00ba | 786 | old_alignment = 0; |
ede4eed4 KR |
787 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
788 | { | |
d044b40a ILT |
789 | Elf_Internal_Versym iver; |
790 | int vernum; | |
791 | boolean override; | |
792 | ||
793 | if (ever != NULL) | |
794 | { | |
795 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
796 | vernum = iver.vs_vers & VERSYM_VERSION; | |
797 | ||
798 | /* If this is a hidden symbol, or if it is not version | |
799 | 1, we append the version name to the symbol name. | |
800 | However, we do not modify a non-hidden absolute | |
801 | symbol, because it might be the version symbol | |
802 | itself. FIXME: What if it isn't? */ | |
803 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 | |
804 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
805 | { | |
806 | const char *verstr; | |
807 | int namelen, newlen; | |
808 | char *newname, *p; | |
809 | ||
e549b1d2 ILT |
810 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) |
811 | { | |
812 | (*_bfd_error_handler) | |
813 | ("%s: %s: invalid version %d (max %d)", | |
814 | abfd->filename, name, vernum, | |
815 | elf_tdata (abfd)->dynverdef_hdr.sh_info); | |
816 | bfd_set_error (bfd_error_bad_value); | |
817 | goto error_return; | |
818 | } | |
819 | else if (vernum > 1) | |
d044b40a ILT |
820 | verstr = elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; |
821 | else | |
822 | verstr = ""; | |
823 | ||
824 | namelen = strlen (name); | |
825 | newlen = namelen + strlen (verstr) + 2; | |
826 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
827 | ++newlen; | |
828 | ||
829 | newname = (char *) bfd_alloc (abfd, newlen); | |
830 | if (newname == NULL) | |
831 | goto error_return; | |
832 | strcpy (newname, name); | |
833 | p = newname + namelen; | |
834 | *p++ = ELF_VER_CHR; | |
835 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
836 | *p++ = ELF_VER_CHR; | |
837 | strcpy (p, verstr); | |
838 | ||
839 | name = newname; | |
840 | } | |
841 | } | |
842 | ||
ede4eed4 KR |
843 | /* We need to look up the symbol now in order to get some of |
844 | the dynamic object handling right. We pass the hash | |
845 | table entry in to _bfd_generic_link_add_one_symbol so | |
846 | that it does not have to look it up again. */ | |
8881b321 ILT |
847 | if (! bfd_is_und_section (sec)) |
848 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
849 | true, false, false); | |
850 | else | |
851 | h = ((struct elf_link_hash_entry *) | |
852 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, | |
853 | false, false)); | |
ede4eed4 KR |
854 | if (h == NULL) |
855 | goto error_return; | |
856 | *sym_hash = h; | |
857 | ||
869b7d80 ILT |
858 | if (h->root.type == bfd_link_hash_new) |
859 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
860 | ||
0cb70568 ILT |
861 | while (h->root.type == bfd_link_hash_indirect |
862 | || h->root.type == bfd_link_hash_warning) | |
863 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
864 | ||
fd6c00ba ILT |
865 | /* FIXME: There are too many cases here, and it's too |
866 | confusing. This code needs to be reorganized somehow. */ | |
867 | ||
ee9f09cd | 868 | /* It's OK to change the type if it used to be a weak |
37897db0 ILT |
869 | definition, or if the current definition is weak (and |
870 | hence might be ignored). */ | |
5b3b9ff6 | 871 | if (h->root.type == bfd_link_hash_defweak |
37897db0 ILT |
872 | || h->root.type == bfd_link_hash_undefweak |
873 | || bind == STB_WEAK) | |
5b3b9ff6 | 874 | type_change_ok = true; |
ee9f09cd ILT |
875 | |
876 | /* It's OK to change the size if it used to be a weak | |
877 | definition, or if it used to be undefined, or if we will | |
5b3b9ff6 ILT |
878 | be overriding an old definition. */ |
879 | if (type_change_ok | |
880 | || h->root.type == bfd_link_hash_undefined) | |
881 | size_change_ok = true; | |
8235c112 | 882 | |
fd6c00ba ILT |
883 | if (h->root.type == bfd_link_hash_common) |
884 | old_alignment = h->root.u.c.p->alignment_power; | |
885 | ||
d044b40a ILT |
886 | override = false; |
887 | ||
ede4eed4 KR |
888 | /* If we are looking at a dynamic object, and this is a |
889 | definition, we need to see if it has already been defined | |
890 | by some other object. If it has, we want to use the | |
891 | existing definition, and we do not want to report a | |
892 | multiple symbol definition error; we do this by | |
4596421b ILT |
893 | clobbering sec to be bfd_und_section_ptr. We treat a |
894 | common symbol as a definition if the symbol in the shared | |
895 | library is a function, since common symbols always | |
896 | represent variables; this can cause confusion in | |
897 | principle, but any such confusion would seem to indicate | |
d0c45fcb | 898 | an erroneous program or shared library. */ |
ede4eed4 KR |
899 | if (dynamic && definition) |
900 | { | |
901 | if (h->root.type == bfd_link_hash_defined | |
3d7c42c9 ILT |
902 | || h->root.type == bfd_link_hash_defweak |
903 | || (h->root.type == bfd_link_hash_common | |
d0c45fcb ILT |
904 | && (bind == STB_WEAK |
905 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC))) | |
3d7c42c9 | 906 | { |
fd6c00ba ILT |
907 | /* In the special case of two symbols which look |
908 | like common symbols in a dynamic object, set the | |
909 | size of the symbol to the larger of the two. */ | |
910 | if ((sec->flags & SEC_ALLOC) != 0 | |
911 | && (sec->flags & SEC_LOAD) == 0 | |
912 | && sym.st_size > 0 | |
913 | && bind != STB_WEAK | |
914 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
915 | && h->root.type == bfd_link_hash_defined | |
916 | && (h->elf_link_hash_flags | |
917 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
918 | && (h->root.u.def.section->owner->flags & DYNAMIC) != 0 | |
919 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
920 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
921 | && h->size > 0 | |
922 | && h->type != STT_FUNC | |
923 | && sym.st_size != h->size) | |
924 | { | |
925 | /* Note that we only warn if the size is | |
926 | different. If the size is the same, then we | |
927 | simply let the first shared library override | |
928 | the second. */ | |
929 | if (! ((*info->callbacks->multiple_common) | |
930 | (info, h->root.root.string, | |
931 | h->root.u.def.section->owner, | |
932 | bfd_link_hash_common, | |
933 | h->size, abfd, bfd_link_hash_common, | |
934 | sym.st_size))) | |
935 | goto error_return; | |
936 | if (sym.st_size > h->size) | |
937 | h->size = sym.st_size; | |
938 | } | |
939 | ||
d044b40a | 940 | override = true; |
3d7c42c9 ILT |
941 | sec = bfd_und_section_ptr; |
942 | definition = false; | |
ee9f09cd | 943 | size_change_ok = true; |
4596421b ILT |
944 | if (h->root.type == bfd_link_hash_common) |
945 | type_change_ok = true; | |
3d7c42c9 | 946 | } |
ede4eed4 KR |
947 | } |
948 | ||
d0c45fcb ILT |
949 | /* If we already have a common symbol, and the symbol in the |
950 | shared library is in an uninitialized section, then treat | |
951 | the shared library symbol as a common symbol. This will | |
952 | not always be correct, but it should do little harm. */ | |
953 | if (dynamic | |
954 | && definition | |
955 | && h->root.type == bfd_link_hash_common | |
956 | && (sec->flags & SEC_ALLOC) != 0 | |
77bd8dfa ILT |
957 | && (sec->flags & SEC_LOAD) == 0 |
958 | && sym.st_size > 0 | |
959 | && bind != STB_WEAK | |
960 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC) | |
d0c45fcb | 961 | { |
77bd8dfa ILT |
962 | override = true; |
963 | sec = bfd_com_section_ptr; | |
964 | definition = false; | |
965 | value = sym.st_size; | |
966 | size_change_ok = true; | |
d0c45fcb ILT |
967 | } |
968 | ||
fd6c00ba ILT |
969 | /* If we are not looking at a dynamic object, and we have a |
970 | definition, we want to override any definition we may | |
971 | have from a dynamic object. Symbols from regular files | |
972 | always take precedence over symbols from dynamic objects, | |
973 | even if they are defined after the dynamic object in the | |
974 | link. */ | |
ede4eed4 | 975 | if (! dynamic |
4596421b ILT |
976 | && (definition |
977 | || (bfd_is_com_section (sec) | |
978 | && (h->root.type == bfd_link_hash_defweak | |
979 | || h->type == STT_FUNC))) | |
ede4eed4 KR |
980 | && (h->root.type == bfd_link_hash_defined |
981 | || h->root.type == bfd_link_hash_defweak) | |
982 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
d044b40a | 983 | && (h->root.u.def.section->owner->flags & DYNAMIC) != 0) |
ede4eed4 | 984 | { |
d044b40a | 985 | override = true; |
ede4eed4 KR |
986 | /* Change the hash table entry to undefined, and let |
987 | _bfd_generic_link_add_one_symbol do the right thing | |
988 | with the new definition. */ | |
989 | h->root.type = bfd_link_hash_undefined; | |
990 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
ee9f09cd | 991 | size_change_ok = true; |
4596421b ILT |
992 | if (bfd_is_com_section (sec)) |
993 | type_change_ok = true; | |
d044b40a ILT |
994 | |
995 | /* This union may have been set to be non-NULL when this | |
996 | symbol was seen in a dynamic object. We must force | |
997 | the union to be NULL, so that it is correct for a | |
998 | regular symbol. */ | |
999 | h->verinfo.vertree = NULL; | |
ede4eed4 | 1000 | } |
d044b40a | 1001 | |
fd6c00ba ILT |
1002 | /* If we are not looking at a shared library and we have a |
1003 | common symbol, and the symbol in the shared library is in | |
1004 | an uninitialized section, then treat the shared library | |
1005 | symbol as a common symbol. This will not always be | |
1006 | correct, but it should do little harm. Note that the | |
1007 | above condition already handled cases in which a common | |
1008 | symbol should simply override the definition in the | |
1009 | shared library. */ | |
1010 | if (! dynamic | |
1011 | && ! override | |
1012 | && bfd_is_com_section (sec) | |
1013 | && h->root.type == bfd_link_hash_defined | |
1014 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1015 | && (h->root.u.def.section->owner->flags & DYNAMIC) != 0 | |
1016 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
1017 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1018 | && h->size > 0 | |
1019 | && h->type != STT_FUNC) | |
1020 | { | |
1021 | /* It would be best if we could set the hash table entry | |
1022 | to a common symbol, but we don't know what to use for | |
1023 | the section or the alignment. */ | |
1024 | if (! ((*info->callbacks->multiple_common) | |
1025 | (info, h->root.root.string, | |
1026 | h->root.u.def.section->owner, bfd_link_hash_common, | |
1027 | h->size, abfd, bfd_link_hash_common, value))) | |
1028 | goto error_return; | |
1029 | ||
1030 | if (h->size > value) | |
1031 | value = h->size; | |
1032 | ||
1033 | /* FIXME: We no longer know the alignment required by | |
1034 | the symbol in the shared library, so we just wind up | |
1035 | using the one from the regular object. */ | |
1036 | ||
1037 | override = true; | |
1038 | h->root.type = bfd_link_hash_undefined; | |
1039 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1040 | size_change_ok = true; | |
1041 | type_change_ok = true; | |
1042 | h->verinfo.vertree = NULL; | |
1043 | } | |
1044 | ||
d044b40a ILT |
1045 | if (ever != NULL |
1046 | && ! override | |
1047 | && vernum > 1 | |
1048 | && (h->verinfo.verdef == NULL || definition)) | |
1049 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
ede4eed4 KR |
1050 | } |
1051 | ||
1052 | if (! (_bfd_generic_link_add_one_symbol | |
1053 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
1054 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
1055 | goto error_return; | |
1056 | ||
0cb70568 ILT |
1057 | h = *sym_hash; |
1058 | while (h->root.type == bfd_link_hash_indirect | |
1059 | || h->root.type == bfd_link_hash_warning) | |
1060 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1061 | *sym_hash = h; | |
1062 | ||
452a5efb | 1063 | new_weakdef = false; |
ede4eed4 KR |
1064 | if (dynamic |
1065 | && definition | |
1066 | && (flags & BSF_WEAK) != 0 | |
1067 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
1068 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
0cb70568 | 1069 | && h->weakdef == NULL) |
ede4eed4 KR |
1070 | { |
1071 | /* Keep a list of all weak defined non function symbols from | |
1072 | a dynamic object, using the weakdef field. Later in this | |
1073 | function we will set the weakdef field to the correct | |
1074 | value. We only put non-function symbols from dynamic | |
1075 | objects on this list, because that happens to be the only | |
1076 | time we need to know the normal symbol corresponding to a | |
1077 | weak symbol, and the information is time consuming to | |
1078 | figure out. If the weakdef field is not already NULL, | |
1079 | then this symbol was already defined by some previous | |
1080 | dynamic object, and we will be using that previous | |
1081 | definition anyhow. */ | |
1082 | ||
0cb70568 ILT |
1083 | h->weakdef = weaks; |
1084 | weaks = h; | |
452a5efb | 1085 | new_weakdef = true; |
ede4eed4 KR |
1086 | } |
1087 | ||
fd6c00ba | 1088 | /* Set the alignment of a common symbol. */ |
ede4eed4 | 1089 | if (sym.st_shndx == SHN_COMMON |
0cb70568 | 1090 | && h->root.type == bfd_link_hash_common) |
fd6c00ba ILT |
1091 | { |
1092 | unsigned int align; | |
1093 | ||
1094 | align = bfd_log2 (sym.st_value); | |
1095 | if (align > old_alignment) | |
1096 | h->root.u.c.p->alignment_power = align; | |
1097 | } | |
ede4eed4 KR |
1098 | |
1099 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1100 | { | |
1101 | int old_flags; | |
1102 | boolean dynsym; | |
1103 | int new_flag; | |
1104 | ||
1105 | /* Remember the symbol size and type. */ | |
3d7c42c9 ILT |
1106 | if (sym.st_size != 0 |
1107 | && (definition || h->size == 0)) | |
ede4eed4 | 1108 | { |
ee9f09cd | 1109 | if (h->size != 0 && h->size != sym.st_size && ! size_change_ok) |
3d7c42c9 | 1110 | (*_bfd_error_handler) |
ba254dc5 ILT |
1111 | ("Warning: size of symbol `%s' changed from %lu to %lu in %s", |
1112 | name, (unsigned long) h->size, (unsigned long) sym.st_size, | |
1113 | bfd_get_filename (abfd)); | |
1114 | ||
1115 | h->size = sym.st_size; | |
ede4eed4 | 1116 | } |
031dfce0 ILT |
1117 | |
1118 | /* If this is a common symbol, then we always want H->SIZE | |
1119 | to be the size of the common symbol. The code just above | |
1120 | won't fix the size if a common symbol becomes larger. We | |
1121 | don't warn about a size change here, because that is | |
1122 | covered by --warn-common. */ | |
1123 | if (h->root.type == bfd_link_hash_common) | |
1124 | h->size = h->root.u.c.size; | |
1125 | ||
3d7c42c9 ILT |
1126 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE |
1127 | && (definition || h->type == STT_NOTYPE)) | |
ede4eed4 | 1128 | { |
3d7c42c9 | 1129 | if (h->type != STT_NOTYPE |
8235c112 | 1130 | && h->type != ELF_ST_TYPE (sym.st_info) |
ee9f09cd | 1131 | && ! type_change_ok) |
3d7c42c9 ILT |
1132 | (*_bfd_error_handler) |
1133 | ("Warning: type of symbol `%s' changed from %d to %d in %s", | |
1134 | name, h->type, ELF_ST_TYPE (sym.st_info), | |
1135 | bfd_get_filename (abfd)); | |
1136 | ||
ede4eed4 KR |
1137 | h->type = ELF_ST_TYPE (sym.st_info); |
1138 | } | |
1139 | ||
6c02f1a0 ILT |
1140 | if (sym.st_other != 0 |
1141 | && (definition || h->other == 0)) | |
1142 | h->other = sym.st_other; | |
1143 | ||
ede4eed4 KR |
1144 | /* Set a flag in the hash table entry indicating the type of |
1145 | reference or definition we just found. Keep a count of | |
1146 | the number of dynamic symbols we find. A dynamic symbol | |
1147 | is one which is referenced or defined by both a regular | |
440f3914 | 1148 | object and a shared object. */ |
ede4eed4 KR |
1149 | old_flags = h->elf_link_hash_flags; |
1150 | dynsym = false; | |
1151 | if (! dynamic) | |
1152 | { | |
1153 | if (! definition) | |
1154 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1155 | else | |
1156 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1157 | if (info->shared | |
1158 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1159 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
1160 | dynsym = true; | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | if (! definition) | |
1165 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1166 | else | |
1167 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
0db6249c | 1168 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR |
1c4794f5 ILT |
1169 | | ELF_LINK_HASH_REF_REGULAR)) != 0 |
1170 | || (h->weakdef != NULL | |
440f3914 ILT |
1171 | && ! new_weakdef |
1172 | && h->weakdef->dynindx != -1)) | |
ede4eed4 KR |
1173 | dynsym = true; |
1174 | } | |
1175 | ||
1176 | h->elf_link_hash_flags |= new_flag; | |
d044b40a ILT |
1177 | |
1178 | /* If this symbol has a version, and it is the default | |
1179 | version, we create an indirect symbol from the default | |
1180 | name to the fully decorated name. This will cause | |
1181 | external references which do not specify a version to be | |
1182 | bound to this version of the symbol. */ | |
1183 | if (definition) | |
1184 | { | |
1185 | char *p; | |
1186 | ||
1187 | p = strchr (name, ELF_VER_CHR); | |
1188 | if (p != NULL && p[1] == ELF_VER_CHR) | |
1189 | { | |
1190 | char *shortname; | |
52c92c7f | 1191 | struct elf_link_hash_entry *hold; |
d044b40a ILT |
1192 | |
1193 | shortname = bfd_hash_allocate (&info->hash->table, | |
1194 | p - name + 1); | |
1195 | if (shortname == NULL) | |
1196 | goto error_return; | |
1197 | strncpy (shortname, name, p - name); | |
1198 | shortname[p - name] = '\0'; | |
1199 | ||
52c92c7f ILT |
1200 | /* First look to see if we have an existing symbol |
1201 | with this name. */ | |
1202 | hold = elf_link_hash_lookup (elf_hash_table (info), | |
1203 | shortname, false, false, | |
1204 | false); | |
1205 | ||
1206 | /* If we are looking at a normal object, and the | |
1207 | symbol was seen in a shared object, clobber the | |
1208 | definition in the shared object. */ | |
1209 | if (hold != NULL | |
1210 | && ! dynamic | |
1211 | && (hold->root.type == bfd_link_hash_defined | |
1212 | || hold->root.type == bfd_link_hash_defweak) | |
1213 | && (hold->elf_link_hash_flags | |
1214 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1215 | && ((hold->root.u.def.section->owner->flags & DYNAMIC) | |
1216 | != 0)) | |
1217 | { | |
1218 | /* Change the hash table entry to undefined, so | |
1219 | that _bfd_generic_link_add_one_symbol will do | |
1220 | the right thing. */ | |
1221 | hold->root.type = bfd_link_hash_undefined; | |
1222 | hold->root.u.undef.abfd = | |
1223 | hold->root.u.def.section->owner; | |
1224 | hold->verinfo.vertree = NULL; | |
1225 | hold = NULL; | |
1226 | } | |
d044b40a | 1227 | |
52c92c7f ILT |
1228 | /* If we are looking at a shared object, and we have |
1229 | already seen this symbol defined elsewhere, then | |
1230 | don't try to define it again. */ | |
1231 | if (hold != NULL | |
1232 | && dynamic | |
1233 | && (hold->root.type == bfd_link_hash_defined | |
1234 | || hold->root.type == bfd_link_hash_defweak | |
1235 | || hold->root.type == bfd_link_hash_indirect | |
1236 | || (hold->root.type == bfd_link_hash_common | |
1237 | && (bind == STB_WEAK | |
1238 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC)))) | |
1239 | { | |
1240 | /* Don't add an indirect symbol. */ | |
1241 | } | |
1242 | else | |
d6bfcdb5 | 1243 | { |
52c92c7f ILT |
1244 | struct elf_link_hash_entry *hi; |
1245 | ||
1246 | hi = NULL; | |
1247 | if (! (_bfd_generic_link_add_one_symbol | |
1248 | (info, abfd, shortname, BSF_INDIRECT, | |
1249 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1250 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1251 | goto error_return; | |
1252 | ||
1253 | /* If there is a duplicate definition somewhere, | |
1254 | then HI may not point to an indirect symbol. | |
1255 | We will have reported an error to the user in | |
1256 | that case. */ | |
1257 | ||
1258 | if (hi->root.type == bfd_link_hash_indirect) | |
1259 | { | |
1260 | hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
e549b1d2 ILT |
1261 | |
1262 | /* If the symbol became indirect, then we | |
1263 | assume that we have not seen a definition | |
1264 | before. */ | |
1265 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1266 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1267 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1268 | == 0); | |
1269 | ||
1270 | /* Copy down any references that we may have | |
1271 | already seen to the symbol which just | |
1272 | became indirect. */ | |
1273 | h->elf_link_hash_flags |= | |
1274 | (hi->elf_link_hash_flags | |
1275 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1276 | | ELF_LINK_HASH_REF_REGULAR)); | |
1277 | ||
1278 | /* Copy over the global table offset entry. | |
1279 | This may have been already set up by a | |
1280 | check_relocs routine. */ | |
1281 | if (h->got_offset == (bfd_vma) -1) | |
1282 | { | |
1283 | h->got_offset = hi->got_offset; | |
1284 | hi->got_offset = (bfd_vma) -1; | |
1285 | } | |
1286 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
1287 | ||
1288 | if (h->dynindx == -1) | |
1289 | { | |
1290 | h->dynindx = hi->dynindx; | |
1291 | h->dynstr_index = hi->dynstr_index; | |
1292 | hi->dynindx = -1; | |
1293 | hi->dynstr_index = 0; | |
1294 | } | |
1295 | BFD_ASSERT (hi->dynindx == -1); | |
1296 | ||
1297 | /* FIXME: There may be other information to | |
1298 | copy over for particular targets. */ | |
1299 | ||
1300 | /* See if the new flags lead us to realize | |
1301 | that the symbol must be dynamic. */ | |
1302 | if (! dynsym) | |
1303 | { | |
1304 | if (! dynamic) | |
1305 | { | |
1306 | if (info->shared | |
1307 | || ((hi->elf_link_hash_flags | |
1308 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1309 | != 0)) | |
1310 | dynsym = true; | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | if ((hi->elf_link_hash_flags | |
1315 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1316 | dynsym = true; | |
1317 | } | |
1318 | } | |
52c92c7f | 1319 | } |
d6bfcdb5 ILT |
1320 | } |
1321 | ||
1322 | /* We also need to define an indirection from the | |
1323 | nondefault version of the symbol. */ | |
1324 | ||
1325 | shortname = bfd_hash_allocate (&info->hash->table, | |
1326 | strlen (name)); | |
1327 | if (shortname == NULL) | |
1328 | goto error_return; | |
1329 | strncpy (shortname, name, p - name); | |
1330 | strcpy (shortname + (p - name), p + 1); | |
1331 | ||
52c92c7f ILT |
1332 | /* First look to see if we have an existing symbol |
1333 | with this name. */ | |
1334 | hold = elf_link_hash_lookup (elf_hash_table (info), | |
1335 | shortname, false, false, | |
1336 | false); | |
1337 | ||
1338 | /* If we are looking at a normal object, and the | |
1339 | symbol was seen in a shared object, clobber the | |
1340 | definition in the shared object. */ | |
1341 | if (hold != NULL | |
1342 | && ! dynamic | |
1343 | && (hold->root.type == bfd_link_hash_defined | |
1344 | || hold->root.type == bfd_link_hash_defweak) | |
1345 | && (hold->elf_link_hash_flags | |
1346 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1347 | && ((hold->root.u.def.section->owner->flags & DYNAMIC) | |
1348 | != 0)) | |
1349 | { | |
1350 | /* Change the hash table entry to undefined, so | |
1351 | that _bfd_generic_link_add_one_symbol will do | |
1352 | the right thing. */ | |
1353 | hold->root.type = bfd_link_hash_undefined; | |
1354 | hold->root.u.undef.abfd = | |
1355 | hold->root.u.def.section->owner; | |
1356 | hold->verinfo.vertree = NULL; | |
1357 | hold = NULL; | |
1358 | } | |
d6bfcdb5 | 1359 | |
52c92c7f ILT |
1360 | /* If we are looking at a shared object, and we have |
1361 | already seen this symbol defined elsewhere, then | |
1362 | don't try to define it again. */ | |
1363 | if (hold != NULL | |
1364 | && dynamic | |
1365 | && (hold->root.type == bfd_link_hash_defined | |
1366 | || hold->root.type == bfd_link_hash_defweak | |
1367 | || hold->root.type == bfd_link_hash_indirect | |
1368 | || (hold->root.type == bfd_link_hash_common | |
1369 | && (bind == STB_WEAK | |
1370 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC)))) | |
d6bfcdb5 | 1371 | { |
52c92c7f ILT |
1372 | /* Don't add an indirect symbol. */ |
1373 | } | |
1374 | else | |
1375 | { | |
1376 | struct elf_link_hash_entry *hi; | |
1377 | ||
1378 | hi = NULL; | |
1379 | if (! (_bfd_generic_link_add_one_symbol | |
1380 | (info, abfd, shortname, BSF_INDIRECT, | |
1381 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1382 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1383 | goto error_return; | |
1384 | ||
1385 | /* If there is a duplicate definition somewhere, | |
1386 | then HI may not point to an indirect symbol. | |
1387 | We will have reported an error to the user in | |
1388 | that case. */ | |
1389 | ||
1390 | if (hi->root.type == bfd_link_hash_indirect) | |
1391 | { | |
1392 | hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
e549b1d2 ILT |
1393 | |
1394 | /* If the symbol became indirect, then we | |
1395 | assume that we have not seen a definition | |
1396 | before. */ | |
1397 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1398 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1399 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1400 | == 0); | |
1401 | ||
1402 | /* Copy down any references that we may have | |
1403 | already seen to the symbol which just | |
1404 | became indirect. */ | |
1405 | h->elf_link_hash_flags |= | |
1406 | (hi->elf_link_hash_flags | |
1407 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1408 | | ELF_LINK_HASH_REF_REGULAR)); | |
1409 | ||
1410 | /* Copy over the global table offset entry. | |
1411 | This may have been already set up by a | |
1412 | check_relocs routine. */ | |
1413 | if (h->got_offset == (bfd_vma) -1) | |
1414 | { | |
1415 | h->got_offset = hi->got_offset; | |
1416 | hi->got_offset = (bfd_vma) -1; | |
1417 | } | |
1418 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
1419 | ||
1420 | if (h->dynindx == -1) | |
1421 | { | |
1422 | h->dynindx = hi->dynindx; | |
1423 | h->dynstr_index = hi->dynstr_index; | |
1424 | hi->dynindx = -1; | |
1425 | hi->dynstr_index = 0; | |
1426 | } | |
1427 | BFD_ASSERT (hi->dynindx == -1); | |
1428 | ||
1429 | /* FIXME: There may be other information to | |
1430 | copy over for particular targets. */ | |
1431 | ||
1432 | /* See if the new flags lead us to realize | |
1433 | that the symbol must be dynamic. */ | |
1434 | if (! dynsym) | |
1435 | { | |
1436 | if (! dynamic) | |
1437 | { | |
1438 | if (info->shared | |
1439 | || ((hi->elf_link_hash_flags | |
1440 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1441 | != 0)) | |
1442 | dynsym = true; | |
1443 | } | |
1444 | else | |
1445 | { | |
1446 | if ((hi->elf_link_hash_flags | |
1447 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1448 | dynsym = true; | |
1449 | } | |
1450 | } | |
52c92c7f | 1451 | } |
d6bfcdb5 | 1452 | } |
d044b40a ILT |
1453 | } |
1454 | } | |
1455 | ||
ede4eed4 KR |
1456 | if (dynsym && h->dynindx == -1) |
1457 | { | |
1458 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1459 | goto error_return; | |
452a5efb ILT |
1460 | if (h->weakdef != NULL |
1461 | && ! new_weakdef | |
1462 | && h->weakdef->dynindx == -1) | |
1463 | { | |
1464 | if (! _bfd_elf_link_record_dynamic_symbol (info, | |
1465 | h->weakdef)) | |
1466 | goto error_return; | |
1467 | } | |
ede4eed4 KR |
1468 | } |
1469 | } | |
1470 | } | |
1471 | ||
1472 | /* Now set the weakdefs field correctly for all the weak defined | |
1473 | symbols we found. The only way to do this is to search all the | |
1474 | symbols. Since we only need the information for non functions in | |
1475 | dynamic objects, that's the only time we actually put anything on | |
1476 | the list WEAKS. We need this information so that if a regular | |
1477 | object refers to a symbol defined weakly in a dynamic object, the | |
1478 | real symbol in the dynamic object is also put in the dynamic | |
1479 | symbols; we also must arrange for both symbols to point to the | |
1480 | same memory location. We could handle the general case of symbol | |
1481 | aliasing, but a general symbol alias can only be generated in | |
1482 | assembler code, handling it correctly would be very time | |
1483 | consuming, and other ELF linkers don't handle general aliasing | |
1484 | either. */ | |
1485 | while (weaks != NULL) | |
1486 | { | |
1487 | struct elf_link_hash_entry *hlook; | |
1488 | asection *slook; | |
1489 | bfd_vma vlook; | |
1490 | struct elf_link_hash_entry **hpp; | |
1491 | struct elf_link_hash_entry **hppend; | |
1492 | ||
1493 | hlook = weaks; | |
1494 | weaks = hlook->weakdef; | |
1495 | hlook->weakdef = NULL; | |
1496 | ||
1497 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
1498 | || hlook->root.type == bfd_link_hash_defweak | |
1499 | || hlook->root.type == bfd_link_hash_common | |
1500 | || hlook->root.type == bfd_link_hash_indirect); | |
1501 | slook = hlook->root.u.def.section; | |
1502 | vlook = hlook->root.u.def.value; | |
1503 | ||
1504 | hpp = elf_sym_hashes (abfd); | |
1505 | hppend = hpp + extsymcount; | |
1506 | for (; hpp < hppend; hpp++) | |
1507 | { | |
1508 | struct elf_link_hash_entry *h; | |
1509 | ||
1510 | h = *hpp; | |
1511 | if (h != NULL && h != hlook | |
d2bb6c79 | 1512 | && h->root.type == bfd_link_hash_defined |
ede4eed4 KR |
1513 | && h->root.u.def.section == slook |
1514 | && h->root.u.def.value == vlook) | |
1515 | { | |
1516 | hlook->weakdef = h; | |
1517 | ||
1518 | /* If the weak definition is in the list of dynamic | |
1519 | symbols, make sure the real definition is put there | |
1520 | as well. */ | |
1521 | if (hlook->dynindx != -1 | |
1522 | && h->dynindx == -1) | |
1523 | { | |
1524 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1525 | goto error_return; | |
1526 | } | |
1527 | ||
440f3914 ILT |
1528 | /* If the real definition is in the list of dynamic |
1529 | symbols, make sure the weak definition is put there | |
1530 | as well. If we don't do this, then the dynamic | |
1531 | loader might not merge the entries for the real | |
1532 | definition and the weak definition. */ | |
1533 | if (h->dynindx != -1 | |
1534 | && hlook->dynindx == -1) | |
1535 | { | |
1536 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
1537 | goto error_return; | |
1538 | } | |
1539 | ||
ede4eed4 KR |
1540 | break; |
1541 | } | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | if (buf != NULL) | |
1546 | { | |
1547 | free (buf); | |
1548 | buf = NULL; | |
1549 | } | |
1550 | ||
d044b40a ILT |
1551 | if (extversym != NULL) |
1552 | { | |
1553 | free (extversym); | |
1554 | extversym = NULL; | |
1555 | } | |
1556 | ||
ede4eed4 KR |
1557 | /* If this object is the same format as the output object, and it is |
1558 | not a shared library, then let the backend look through the | |
1559 | relocs. | |
1560 | ||
1561 | This is required to build global offset table entries and to | |
1562 | arrange for dynamic relocs. It is not required for the | |
1563 | particular common case of linking non PIC code, even when linking | |
1564 | against shared libraries, but unfortunately there is no way of | |
1565 | knowing whether an object file has been compiled PIC or not. | |
1566 | Looking through the relocs is not particularly time consuming. | |
1567 | The problem is that we must either (1) keep the relocs in memory, | |
1568 | which causes the linker to require additional runtime memory or | |
1569 | (2) read the relocs twice from the input file, which wastes time. | |
1570 | This would be a good case for using mmap. | |
1571 | ||
1572 | I have no idea how to handle linking PIC code into a file of a | |
1573 | different format. It probably can't be done. */ | |
1574 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
1575 | if (! dynamic | |
1576 | && abfd->xvec == info->hash->creator | |
1577 | && check_relocs != NULL) | |
1578 | { | |
1579 | asection *o; | |
1580 | ||
1581 | for (o = abfd->sections; o != NULL; o = o->next) | |
1582 | { | |
1583 | Elf_Internal_Rela *internal_relocs; | |
1584 | boolean ok; | |
1585 | ||
1586 | if ((o->flags & SEC_RELOC) == 0 | |
a0c80726 ILT |
1587 | || o->reloc_count == 0 |
1588 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
1589 | && (o->flags & SEC_DEBUGGING) != 0)) | |
ede4eed4 KR |
1590 | continue; |
1591 | ||
c86158e5 ILT |
1592 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
1593 | (abfd, o, (PTR) NULL, | |
1594 | (Elf_Internal_Rela *) NULL, | |
1595 | info->keep_memory)); | |
ede4eed4 KR |
1596 | if (internal_relocs == NULL) |
1597 | goto error_return; | |
1598 | ||
1599 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
1600 | ||
1601 | if (! info->keep_memory) | |
1602 | free (internal_relocs); | |
1603 | ||
1604 | if (! ok) | |
1605 | goto error_return; | |
1606 | } | |
1607 | } | |
1608 | ||
1726b8f0 ILT |
1609 | /* If this is a non-traditional, non-relocateable link, try to |
1610 | optimize the handling of the .stab/.stabstr sections. */ | |
1611 | if (! dynamic | |
1612 | && ! info->relocateable | |
1613 | && ! info->traditional_format | |
1614 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
1615 | && (info->strip != strip_all && info->strip != strip_debugger)) | |
1616 | { | |
1617 | asection *stab, *stabstr; | |
1618 | ||
1619 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
1620 | if (stab != NULL) | |
1621 | { | |
1622 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
1623 | ||
1624 | if (stabstr != NULL) | |
1625 | { | |
1626 | struct bfd_elf_section_data *secdata; | |
1627 | ||
1628 | secdata = elf_section_data (stab); | |
1629 | if (! _bfd_link_section_stabs (abfd, | |
1630 | &elf_hash_table (info)->stab_info, | |
1631 | stab, stabstr, | |
1632 | &secdata->stab_info)) | |
1633 | goto error_return; | |
1634 | } | |
1635 | } | |
1636 | } | |
1637 | ||
ede4eed4 KR |
1638 | return true; |
1639 | ||
1640 | error_return: | |
1641 | if (buf != NULL) | |
1642 | free (buf); | |
1643 | if (dynbuf != NULL) | |
1644 | free (dynbuf); | |
d044b40a ILT |
1645 | if (dynver != NULL) |
1646 | free (dynver); | |
1647 | if (extversym != NULL) | |
1648 | free (extversym); | |
ede4eed4 KR |
1649 | return false; |
1650 | } | |
1651 | ||
1652 | /* Create some sections which will be filled in with dynamic linking | |
1653 | information. ABFD is an input file which requires dynamic sections | |
1654 | to be created. The dynamic sections take up virtual memory space | |
1655 | when the final executable is run, so we need to create them before | |
1656 | addresses are assigned to the output sections. We work out the | |
1657 | actual contents and size of these sections later. */ | |
1658 | ||
1659 | boolean | |
1660 | elf_link_create_dynamic_sections (abfd, info) | |
1661 | bfd *abfd; | |
1662 | struct bfd_link_info *info; | |
1663 | { | |
1664 | flagword flags; | |
1665 | register asection *s; | |
1666 | struct elf_link_hash_entry *h; | |
1667 | struct elf_backend_data *bed; | |
1668 | ||
1669 | if (elf_hash_table (info)->dynamic_sections_created) | |
1670 | return true; | |
1671 | ||
1672 | /* Make sure that all dynamic sections use the same input BFD. */ | |
1673 | if (elf_hash_table (info)->dynobj == NULL) | |
1674 | elf_hash_table (info)->dynobj = abfd; | |
1675 | else | |
1676 | abfd = elf_hash_table (info)->dynobj; | |
1677 | ||
1678 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
1679 | sections. */ | |
ff12f303 ILT |
1680 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
1681 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
ede4eed4 KR |
1682 | |
1683 | /* A dynamically linked executable has a .interp section, but a | |
1684 | shared library does not. */ | |
1685 | if (! info->shared) | |
1686 | { | |
1687 | s = bfd_make_section (abfd, ".interp"); | |
1688 | if (s == NULL | |
1689 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1690 | return false; | |
1691 | } | |
1692 | ||
d044b40a ILT |
1693 | /* Create sections to hold version informations. These are removed |
1694 | if they are not needed. */ | |
1695 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
1696 | if (s == NULL | |
1697 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1698 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
1699 | return false; | |
1700 | ||
1701 | s = bfd_make_section (abfd, ".gnu.version"); | |
1702 | if (s == NULL | |
1703 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1704 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
1705 | return false; | |
1706 | ||
1707 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
1708 | if (s == NULL | |
1709 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1710 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
1711 | return false; | |
1712 | ||
ede4eed4 KR |
1713 | s = bfd_make_section (abfd, ".dynsym"); |
1714 | if (s == NULL | |
1715 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1716 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1717 | return false; | |
1718 | ||
1719 | s = bfd_make_section (abfd, ".dynstr"); | |
1720 | if (s == NULL | |
1721 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1722 | return false; | |
1723 | ||
1724 | /* Create a strtab to hold the dynamic symbol names. */ | |
1725 | if (elf_hash_table (info)->dynstr == NULL) | |
1726 | { | |
1727 | elf_hash_table (info)->dynstr = elf_stringtab_init (); | |
1728 | if (elf_hash_table (info)->dynstr == NULL) | |
1729 | return false; | |
1730 | } | |
1731 | ||
1732 | s = bfd_make_section (abfd, ".dynamic"); | |
1733 | if (s == NULL | |
1734 | || ! bfd_set_section_flags (abfd, s, flags) | |
1735 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1736 | return false; | |
1737 | ||
1738 | /* The special symbol _DYNAMIC is always set to the start of the | |
1739 | .dynamic section. This call occurs before we have processed the | |
1740 | symbols for any dynamic object, so we don't have to worry about | |
1741 | overriding a dynamic definition. We could set _DYNAMIC in a | |
1742 | linker script, but we only want to define it if we are, in fact, | |
1743 | creating a .dynamic section. We don't want to define it if there | |
1744 | is no .dynamic section, since on some ELF platforms the start up | |
1745 | code examines it to decide how to initialize the process. */ | |
1746 | h = NULL; | |
1747 | if (! (_bfd_generic_link_add_one_symbol | |
1748 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
1749 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
1750 | (struct bfd_link_hash_entry **) &h))) | |
1751 | return false; | |
1752 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1753 | h->type = STT_OBJECT; | |
1754 | ||
1755 | if (info->shared | |
1756 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1757 | return false; | |
1758 | ||
1759 | s = bfd_make_section (abfd, ".hash"); | |
1760 | if (s == NULL | |
1761 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1762 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1763 | return false; | |
1764 | ||
1765 | /* Let the backend create the rest of the sections. This lets the | |
1766 | backend set the right flags. The backend will normally create | |
1767 | the .got and .plt sections. */ | |
1768 | bed = get_elf_backend_data (abfd); | |
1769 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
1770 | return false; | |
1771 | ||
1772 | elf_hash_table (info)->dynamic_sections_created = true; | |
1773 | ||
1774 | return true; | |
1775 | } | |
1776 | ||
1777 | /* Add an entry to the .dynamic table. */ | |
1778 | ||
1779 | boolean | |
1780 | elf_add_dynamic_entry (info, tag, val) | |
1781 | struct bfd_link_info *info; | |
1782 | bfd_vma tag; | |
1783 | bfd_vma val; | |
1784 | { | |
1785 | Elf_Internal_Dyn dyn; | |
1786 | bfd *dynobj; | |
1787 | asection *s; | |
1788 | size_t newsize; | |
1789 | bfd_byte *newcontents; | |
1790 | ||
1791 | dynobj = elf_hash_table (info)->dynobj; | |
1792 | ||
1793 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1794 | BFD_ASSERT (s != NULL); | |
1795 | ||
1796 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
58142f10 | 1797 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
ede4eed4 | 1798 | if (newcontents == NULL) |
58142f10 | 1799 | return false; |
ede4eed4 KR |
1800 | |
1801 | dyn.d_tag = tag; | |
1802 | dyn.d_un.d_val = val; | |
1803 | elf_swap_dyn_out (dynobj, &dyn, | |
1804 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
1805 | ||
1806 | s->_raw_size = newsize; | |
1807 | s->contents = newcontents; | |
1808 | ||
1809 | return true; | |
1810 | } | |
3b3753b8 | 1811 | \f |
ede4eed4 KR |
1812 | |
1813 | /* Read and swap the relocs for a section. They may have been cached. | |
1814 | If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL, | |
1815 | they are used as buffers to read into. They are known to be large | |
1816 | enough. If the INTERNAL_RELOCS relocs argument is NULL, the return | |
1817 | value is allocated using either malloc or bfd_alloc, according to | |
1818 | the KEEP_MEMORY argument. */ | |
1819 | ||
c86158e5 ILT |
1820 | Elf_Internal_Rela * |
1821 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
1822 | keep_memory) | |
ede4eed4 KR |
1823 | bfd *abfd; |
1824 | asection *o; | |
1825 | PTR external_relocs; | |
1826 | Elf_Internal_Rela *internal_relocs; | |
1827 | boolean keep_memory; | |
1828 | { | |
1829 | Elf_Internal_Shdr *rel_hdr; | |
1830 | PTR alloc1 = NULL; | |
1831 | Elf_Internal_Rela *alloc2 = NULL; | |
1832 | ||
1833 | if (elf_section_data (o)->relocs != NULL) | |
1834 | return elf_section_data (o)->relocs; | |
1835 | ||
1836 | if (o->reloc_count == 0) | |
1837 | return NULL; | |
1838 | ||
1839 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
1840 | ||
1841 | if (internal_relocs == NULL) | |
1842 | { | |
1843 | size_t size; | |
1844 | ||
1845 | size = o->reloc_count * sizeof (Elf_Internal_Rela); | |
1846 | if (keep_memory) | |
1847 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
1848 | else | |
58142f10 | 1849 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
ede4eed4 | 1850 | if (internal_relocs == NULL) |
58142f10 | 1851 | goto error_return; |
ede4eed4 KR |
1852 | } |
1853 | ||
1854 | if (external_relocs == NULL) | |
1855 | { | |
58142f10 | 1856 | alloc1 = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size); |
ede4eed4 | 1857 | if (alloc1 == NULL) |
58142f10 | 1858 | goto error_return; |
ede4eed4 KR |
1859 | external_relocs = alloc1; |
1860 | } | |
1861 | ||
1862 | if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0) | |
1863 | || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd) | |
1864 | != rel_hdr->sh_size)) | |
1865 | goto error_return; | |
1866 | ||
1867 | /* Swap in the relocs. For convenience, we always produce an | |
1868 | Elf_Internal_Rela array; if the relocs are Rel, we set the addend | |
1869 | to 0. */ | |
1870 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
1871 | { | |
1872 | Elf_External_Rel *erel; | |
1873 | Elf_External_Rel *erelend; | |
1874 | Elf_Internal_Rela *irela; | |
1875 | ||
1876 | erel = (Elf_External_Rel *) external_relocs; | |
1877 | erelend = erel + o->reloc_count; | |
1878 | irela = internal_relocs; | |
1879 | for (; erel < erelend; erel++, irela++) | |
1880 | { | |
1881 | Elf_Internal_Rel irel; | |
1882 | ||
1883 | elf_swap_reloc_in (abfd, erel, &irel); | |
1884 | irela->r_offset = irel.r_offset; | |
1885 | irela->r_info = irel.r_info; | |
1886 | irela->r_addend = 0; | |
1887 | } | |
1888 | } | |
1889 | else | |
1890 | { | |
1891 | Elf_External_Rela *erela; | |
1892 | Elf_External_Rela *erelaend; | |
1893 | Elf_Internal_Rela *irela; | |
1894 | ||
1895 | BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)); | |
1896 | ||
1897 | erela = (Elf_External_Rela *) external_relocs; | |
1898 | erelaend = erela + o->reloc_count; | |
1899 | irela = internal_relocs; | |
1900 | for (; erela < erelaend; erela++, irela++) | |
1901 | elf_swap_reloca_in (abfd, erela, irela); | |
1902 | } | |
1903 | ||
1904 | /* Cache the results for next time, if we can. */ | |
1905 | if (keep_memory) | |
1906 | elf_section_data (o)->relocs = internal_relocs; | |
ff12f303 | 1907 | |
ede4eed4 KR |
1908 | if (alloc1 != NULL) |
1909 | free (alloc1); | |
1910 | ||
1911 | /* Don't free alloc2, since if it was allocated we are passing it | |
1912 | back (under the name of internal_relocs). */ | |
1913 | ||
1914 | return internal_relocs; | |
1915 | ||
1916 | error_return: | |
1917 | if (alloc1 != NULL) | |
1918 | free (alloc1); | |
1919 | if (alloc2 != NULL) | |
1920 | free (alloc2); | |
1921 | return NULL; | |
1922 | } | |
3b3753b8 | 1923 | \f |
ede4eed4 KR |
1924 | |
1925 | /* Record an assignment to a symbol made by a linker script. We need | |
1926 | this in case some dynamic object refers to this symbol. */ | |
1927 | ||
1928 | /*ARGSUSED*/ | |
1929 | boolean | |
1930 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) | |
1931 | bfd *output_bfd; | |
1932 | struct bfd_link_info *info; | |
1933 | const char *name; | |
1934 | boolean provide; | |
1935 | { | |
1936 | struct elf_link_hash_entry *h; | |
1937 | ||
1938 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
1939 | return true; | |
1940 | ||
1941 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false); | |
1942 | if (h == NULL) | |
1943 | return false; | |
1944 | ||
869b7d80 ILT |
1945 | if (h->root.type == bfd_link_hash_new) |
1946 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
1947 | ||
ede4eed4 KR |
1948 | /* If this symbol is being provided by the linker script, and it is |
1949 | currently defined by a dynamic object, but not by a regular | |
1950 | object, then mark it as undefined so that the generic linker will | |
1951 | force the correct value. */ | |
1952 | if (provide | |
1953 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1954 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1955 | h->root.type = bfd_link_hash_undefined; | |
1956 | ||
1957 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1958 | h->type = STT_OBJECT; | |
1959 | ||
1960 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1961 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
1962 | || info->shared) | |
1963 | && h->dynindx == -1) | |
1964 | { | |
1965 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1966 | return false; | |
1967 | ||
1968 | /* If this is a weak defined symbol, and we know a corresponding | |
1969 | real symbol from the same dynamic object, make sure the real | |
1970 | symbol is also made into a dynamic symbol. */ | |
1971 | if (h->weakdef != NULL | |
1972 | && h->weakdef->dynindx == -1) | |
1973 | { | |
1974 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
1975 | return false; | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | return true; | |
1980 | } | |
3b3753b8 | 1981 | \f |
d044b40a ILT |
1982 | /* This structure is used to pass information to |
1983 | elf_link_assign_sym_version. */ | |
1984 | ||
1985 | struct elf_assign_sym_version_info | |
1986 | { | |
1987 | /* Output BFD. */ | |
1988 | bfd *output_bfd; | |
1989 | /* General link information. */ | |
1990 | struct bfd_link_info *info; | |
1991 | /* Version tree. */ | |
1992 | struct bfd_elf_version_tree *verdefs; | |
1993 | /* Whether we are exporting all dynamic symbols. */ | |
1994 | boolean export_dynamic; | |
1995 | /* Whether we removed any symbols from the dynamic symbol table. */ | |
1996 | boolean removed_dynamic; | |
1997 | /* Whether we had a failure. */ | |
1998 | boolean failed; | |
1999 | }; | |
2000 | ||
2001 | /* This structure is used to pass information to | |
2002 | elf_link_find_version_dependencies. */ | |
2003 | ||
2004 | struct elf_find_verdep_info | |
2005 | { | |
2006 | /* Output BFD. */ | |
2007 | bfd *output_bfd; | |
2008 | /* General link information. */ | |
2009 | struct bfd_link_info *info; | |
2010 | /* The number of dependencies. */ | |
2011 | unsigned int vers; | |
2012 | /* Whether we had a failure. */ | |
2013 | boolean failed; | |
2014 | }; | |
ede4eed4 KR |
2015 | |
2016 | /* Array used to determine the number of hash table buckets to use | |
2017 | based on the number of symbols there are. If there are fewer than | |
2018 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2019 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6b8ec6f3 | 2020 | than 32771 buckets. */ |
ede4eed4 KR |
2021 | |
2022 | static const size_t elf_buckets[] = | |
2023 | { | |
6b8ec6f3 ILT |
2024 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, |
2025 | 16411, 32771, 0 | |
ede4eed4 KR |
2026 | }; |
2027 | ||
2028 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2029 | called by the ELF linker emulation before_allocation routine. We | |
2030 | must set the sizes of the sections before the linker sets the | |
2031 | addresses of the various sections. */ | |
2032 | ||
2033 | boolean | |
2034 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, | |
148437ec | 2035 | export_dynamic, filter_shlib, |
d044b40a ILT |
2036 | auxiliary_filters, info, sinterpptr, |
2037 | verdefs) | |
ede4eed4 KR |
2038 | bfd *output_bfd; |
2039 | const char *soname; | |
2040 | const char *rpath; | |
2041 | boolean export_dynamic; | |
148437ec | 2042 | const char *filter_shlib; |
db109ca2 | 2043 | const char * const *auxiliary_filters; |
ede4eed4 KR |
2044 | struct bfd_link_info *info; |
2045 | asection **sinterpptr; | |
d044b40a | 2046 | struct bfd_elf_version_tree *verdefs; |
ede4eed4 | 2047 | { |
d044b40a | 2048 | bfd_size_type soname_indx; |
ede4eed4 KR |
2049 | bfd *dynobj; |
2050 | struct elf_backend_data *bed; | |
e549b1d2 | 2051 | bfd_size_type old_dynsymcount; |
ede4eed4 KR |
2052 | |
2053 | *sinterpptr = NULL; | |
2054 | ||
d044b40a ILT |
2055 | soname_indx = -1; |
2056 | ||
ede4eed4 KR |
2057 | if (info->hash->creator->flavour != bfd_target_elf_flavour) |
2058 | return true; | |
2059 | ||
ff12f303 ILT |
2060 | /* The backend may have to create some sections regardless of whether |
2061 | we're dynamic or not. */ | |
2062 | bed = get_elf_backend_data (output_bfd); | |
2063 | if (bed->elf_backend_always_size_sections | |
2064 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
2065 | return false; | |
2066 | ||
ede4eed4 KR |
2067 | dynobj = elf_hash_table (info)->dynobj; |
2068 | ||
2069 | /* If there were no dynamic objects in the link, there is nothing to | |
2070 | do here. */ | |
2071 | if (dynobj == NULL) | |
2072 | return true; | |
2073 | ||
2074 | /* If we are supposed to export all symbols into the dynamic symbol | |
2075 | table (this is not the normal case), then do so. */ | |
2076 | if (export_dynamic) | |
2077 | { | |
2078 | struct elf_info_failed eif; | |
2079 | ||
2080 | eif.failed = false; | |
2081 | eif.info = info; | |
2082 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, | |
2083 | (PTR) &eif); | |
2084 | if (eif.failed) | |
2085 | return false; | |
2086 | } | |
2087 | ||
2088 | if (elf_hash_table (info)->dynamic_sections_created) | |
2089 | { | |
2090 | struct elf_info_failed eif; | |
73a68447 | 2091 | struct elf_link_hash_entry *h; |
ede4eed4 KR |
2092 | bfd_size_type strsize; |
2093 | ||
2094 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
2095 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
2096 | ||
2097 | if (soname != NULL) | |
2098 | { | |
d044b40a ILT |
2099 | soname_indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, |
2100 | soname, true, true); | |
2101 | if (soname_indx == (bfd_size_type) -1 | |
2102 | || ! elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
ede4eed4 | 2103 | return false; |
ff12f303 | 2104 | } |
ede4eed4 | 2105 | |
951fe66d ILT |
2106 | if (info->symbolic) |
2107 | { | |
2108 | if (! elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
2109 | return false; | |
2110 | } | |
2111 | ||
ede4eed4 KR |
2112 | if (rpath != NULL) |
2113 | { | |
2114 | bfd_size_type indx; | |
2115 | ||
2116 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath, | |
2117 | true, true); | |
2118 | if (indx == (bfd_size_type) -1 | |
2119 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
2120 | return false; | |
2121 | } | |
2122 | ||
148437ec ILT |
2123 | if (filter_shlib != NULL) |
2124 | { | |
2125 | bfd_size_type indx; | |
2126 | ||
2127 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2128 | filter_shlib, true, true); | |
2129 | if (indx == (bfd_size_type) -1 | |
2130 | || ! elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
2131 | return false; | |
2132 | } | |
2133 | ||
db109ca2 | 2134 | if (auxiliary_filters != NULL) |
148437ec | 2135 | { |
db109ca2 | 2136 | const char * const *p; |
148437ec | 2137 | |
db109ca2 ILT |
2138 | for (p = auxiliary_filters; *p != NULL; p++) |
2139 | { | |
2140 | bfd_size_type indx; | |
2141 | ||
2142 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2143 | *p, true, true); | |
2144 | if (indx == (bfd_size_type) -1 | |
2145 | || ! elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
2146 | return false; | |
2147 | } | |
148437ec ILT |
2148 | } |
2149 | ||
ede4eed4 KR |
2150 | /* Find all symbols which were defined in a dynamic object and make |
2151 | the backend pick a reasonable value for them. */ | |
2152 | eif.failed = false; | |
2153 | eif.info = info; | |
2154 | elf_link_hash_traverse (elf_hash_table (info), | |
2155 | elf_adjust_dynamic_symbol, | |
2156 | (PTR) &eif); | |
2157 | if (eif.failed) | |
2158 | return false; | |
2159 | ||
2160 | /* Add some entries to the .dynamic section. We fill in some of the | |
2161 | values later, in elf_bfd_final_link, but we must add the entries | |
2162 | now so that we know the final size of the .dynamic section. */ | |
73a68447 ILT |
2163 | h = elf_link_hash_lookup (elf_hash_table (info), "_init", false, |
2164 | false, false); | |
2165 | if (h != NULL | |
2166 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2167 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2168 | { |
2169 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
2170 | return false; | |
2171 | } | |
73a68447 ILT |
2172 | h = elf_link_hash_lookup (elf_hash_table (info), "_fini", false, |
2173 | false, false); | |
2174 | if (h != NULL | |
2175 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2176 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2177 | { |
2178 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
2179 | return false; | |
2180 | } | |
2181 | strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2182 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
2183 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
2184 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
2185 | || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
2186 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
2187 | sizeof (Elf_External_Sym))) | |
2188 | return false; | |
2189 | } | |
2190 | ||
2191 | /* The backend must work out the sizes of all the other dynamic | |
2192 | sections. */ | |
e549b1d2 | 2193 | old_dynsymcount = elf_hash_table (info)->dynsymcount; |
ede4eed4 KR |
2194 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
2195 | return false; | |
2196 | ||
2197 | if (elf_hash_table (info)->dynamic_sections_created) | |
2198 | { | |
2199 | size_t dynsymcount; | |
2200 | asection *s; | |
2201 | size_t i; | |
2202 | size_t bucketcount = 0; | |
2203 | Elf_Internal_Sym isym; | |
d6bfcdb5 | 2204 | struct elf_assign_sym_version_info sinfo; |
ede4eed4 | 2205 | |
d044b40a ILT |
2206 | /* Set up the version definition section. */ |
2207 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
2208 | BFD_ASSERT (s != NULL); | |
d6bfcdb5 ILT |
2209 | |
2210 | /* Attach all the symbols to their version information. This | |
2211 | may cause some symbols to be unexported. */ | |
2212 | sinfo.output_bfd = output_bfd; | |
2213 | sinfo.info = info; | |
2214 | sinfo.verdefs = verdefs; | |
2215 | sinfo.export_dynamic = export_dynamic; | |
2216 | sinfo.removed_dynamic = false; | |
2217 | sinfo.failed = false; | |
2218 | ||
2219 | elf_link_hash_traverse (elf_hash_table (info), | |
2220 | elf_link_assign_sym_version, | |
2221 | (PTR) &sinfo); | |
2222 | if (sinfo.failed) | |
2223 | return false; | |
2224 | ||
2225 | /* We may have created additional version definitions if we are | |
2226 | just linking a regular application. */ | |
2227 | verdefs = sinfo.verdefs; | |
2228 | ||
d044b40a ILT |
2229 | if (verdefs == NULL) |
2230 | { | |
d044b40a ILT |
2231 | asection **spp; |
2232 | ||
d044b40a ILT |
2233 | /* Don't include this section in the output file. */ |
2234 | for (spp = &output_bfd->sections; | |
2235 | *spp != s->output_section; | |
2236 | spp = &(*spp)->next) | |
2237 | ; | |
2238 | *spp = s->output_section->next; | |
2239 | --output_bfd->section_count; | |
2240 | } | |
2241 | else | |
2242 | { | |
d044b40a ILT |
2243 | unsigned int cdefs; |
2244 | bfd_size_type size; | |
2245 | struct bfd_elf_version_tree *t; | |
2246 | bfd_byte *p; | |
2247 | Elf_Internal_Verdef def; | |
2248 | Elf_Internal_Verdaux defaux; | |
2249 | ||
d044b40a ILT |
2250 | if (sinfo.removed_dynamic) |
2251 | { | |
2252 | /* Some dynamic symbols were changed to be local | |
e549b1d2 ILT |
2253 | symbols. In this case, we renumber all of the |
2254 | dynamic symbols, so that we don't have a hole. If | |
2255 | the backend changed dynsymcount, then assume that the | |
2256 | new symbols are at the start. This is the case on | |
2257 | the MIPS. FIXME: The names of the removed symbols | |
2258 | will still be in the dynamic string table, wasting | |
2259 | space. */ | |
2260 | elf_hash_table (info)->dynsymcount = | |
2261 | 1 + (elf_hash_table (info)->dynsymcount - old_dynsymcount); | |
d044b40a ILT |
2262 | elf_link_hash_traverse (elf_hash_table (info), |
2263 | elf_link_renumber_dynsyms, | |
2264 | (PTR) info); | |
2265 | } | |
2266 | ||
2267 | cdefs = 0; | |
2268 | size = 0; | |
2269 | ||
2270 | /* Make space for the base version. */ | |
2271 | size += sizeof (Elf_External_Verdef); | |
2272 | size += sizeof (Elf_External_Verdaux); | |
2273 | ++cdefs; | |
2274 | ||
2275 | for (t = verdefs; t != NULL; t = t->next) | |
2276 | { | |
2277 | struct bfd_elf_version_deps *n; | |
2278 | ||
2279 | size += sizeof (Elf_External_Verdef); | |
2280 | size += sizeof (Elf_External_Verdaux); | |
2281 | ++cdefs; | |
2282 | ||
2283 | for (n = t->deps; n != NULL; n = n->next) | |
2284 | size += sizeof (Elf_External_Verdaux); | |
2285 | } | |
2286 | ||
2287 | s->_raw_size = size; | |
2288 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2289 | if (s->contents == NULL && s->_raw_size != 0) | |
2290 | return false; | |
2291 | ||
2292 | /* Fill in the version definition section. */ | |
2293 | ||
2294 | p = s->contents; | |
2295 | ||
2296 | def.vd_version = VER_DEF_CURRENT; | |
2297 | def.vd_flags = VER_FLG_BASE; | |
2298 | def.vd_ndx = 1; | |
2299 | def.vd_cnt = 1; | |
2300 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2301 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2302 | + sizeof (Elf_External_Verdaux)); | |
2303 | ||
2304 | if (soname_indx != -1) | |
2305 | { | |
2306 | def.vd_hash = bfd_elf_hash ((const unsigned char *) soname); | |
2307 | defaux.vda_name = soname_indx; | |
2308 | } | |
2309 | else | |
2310 | { | |
2311 | const char *name; | |
2312 | bfd_size_type indx; | |
2313 | ||
2314 | name = output_bfd->filename; | |
2315 | def.vd_hash = bfd_elf_hash ((const unsigned char *) name); | |
2316 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2317 | name, true, false); | |
2318 | if (indx == (bfd_size_type) -1) | |
2319 | return false; | |
2320 | defaux.vda_name = indx; | |
2321 | } | |
2322 | defaux.vda_next = 0; | |
2323 | ||
2324 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2325 | (Elf_External_Verdef *)p); | |
2326 | p += sizeof (Elf_External_Verdef); | |
2327 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2328 | (Elf_External_Verdaux *) p); | |
2329 | p += sizeof (Elf_External_Verdaux); | |
2330 | ||
2331 | for (t = verdefs; t != NULL; t = t->next) | |
2332 | { | |
2333 | unsigned int cdeps; | |
2334 | struct bfd_elf_version_deps *n; | |
2335 | struct elf_link_hash_entry *h; | |
2336 | ||
2337 | cdeps = 0; | |
2338 | for (n = t->deps; n != NULL; n = n->next) | |
2339 | ++cdeps; | |
2340 | ||
2341 | /* Add a symbol representing this version. */ | |
2342 | h = NULL; | |
2343 | if (! (_bfd_generic_link_add_one_symbol | |
2344 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
2345 | (bfd_vma) 0, (const char *) NULL, false, | |
2346 | get_elf_backend_data (dynobj)->collect, | |
2347 | (struct bfd_link_hash_entry **) &h))) | |
2348 | return false; | |
2349 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
2350 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2351 | h->type = STT_OBJECT; | |
2352 | h->verinfo.vertree = t; | |
2353 | ||
d6bfcdb5 ILT |
2354 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) |
2355 | return false; | |
d044b40a ILT |
2356 | |
2357 | def.vd_version = VER_DEF_CURRENT; | |
2358 | def.vd_flags = 0; | |
2359 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
2360 | def.vd_flags |= VER_FLG_WEAK; | |
2361 | def.vd_ndx = t->vernum + 1; | |
2362 | def.vd_cnt = cdeps + 1; | |
2363 | def.vd_hash = bfd_elf_hash ((const unsigned char *) t->name); | |
2364 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2365 | if (t->next != NULL) | |
2366 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2367 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
2368 | else | |
2369 | def.vd_next = 0; | |
2370 | ||
2371 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2372 | (Elf_External_Verdef *) p); | |
2373 | p += sizeof (Elf_External_Verdef); | |
2374 | ||
2375 | defaux.vda_name = h->dynstr_index; | |
2376 | if (t->deps == NULL) | |
2377 | defaux.vda_next = 0; | |
2378 | else | |
2379 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2380 | t->name_indx = defaux.vda_name; | |
2381 | ||
2382 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2383 | (Elf_External_Verdaux *) p); | |
2384 | p += sizeof (Elf_External_Verdaux); | |
2385 | ||
2386 | for (n = t->deps; n != NULL; n = n->next) | |
2387 | { | |
2388 | defaux.vda_name = n->version_needed->name_indx; | |
2389 | if (n->next == NULL) | |
2390 | defaux.vda_next = 0; | |
2391 | else | |
2392 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2393 | ||
2394 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2395 | (Elf_External_Verdaux *) p); | |
2396 | p += sizeof (Elf_External_Verdaux); | |
2397 | } | |
2398 | } | |
2399 | ||
2400 | if (! elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
2401 | || ! elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
2402 | return false; | |
2403 | ||
2404 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
2405 | } | |
2406 | ||
2407 | /* Work out the size of the version reference section. */ | |
2408 | ||
2409 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
2410 | BFD_ASSERT (s != NULL); | |
2411 | { | |
2412 | struct elf_find_verdep_info sinfo; | |
2413 | ||
2414 | sinfo.output_bfd = output_bfd; | |
2415 | sinfo.info = info; | |
2416 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
2417 | if (sinfo.vers == 0) | |
2418 | sinfo.vers = 1; | |
2419 | sinfo.failed = false; | |
2420 | ||
2421 | elf_link_hash_traverse (elf_hash_table (info), | |
2422 | elf_link_find_version_dependencies, | |
2423 | (PTR) &sinfo); | |
2424 | ||
2425 | if (elf_tdata (output_bfd)->verref == NULL) | |
2426 | { | |
2427 | asection **spp; | |
2428 | ||
2429 | /* We don't have any version definitions, so we can just | |
2430 | remove the section. */ | |
2431 | ||
2432 | for (spp = &output_bfd->sections; | |
2433 | *spp != s->output_section; | |
2434 | spp = &(*spp)->next) | |
2435 | ; | |
2436 | *spp = s->output_section->next; | |
2437 | --output_bfd->section_count; | |
2438 | } | |
2439 | else | |
2440 | { | |
2441 | Elf_Internal_Verneed *t; | |
2442 | unsigned int size; | |
2443 | unsigned int crefs; | |
2444 | bfd_byte *p; | |
2445 | ||
2446 | /* Build the version definition section. */ | |
d6bfcdb5 ILT |
2447 | size = 0; |
2448 | crefs = 0; | |
d044b40a ILT |
2449 | for (t = elf_tdata (output_bfd)->verref; |
2450 | t != NULL; | |
2451 | t = t->vn_nextref) | |
2452 | { | |
2453 | Elf_Internal_Vernaux *a; | |
2454 | ||
2455 | size += sizeof (Elf_External_Verneed); | |
2456 | ++crefs; | |
2457 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2458 | size += sizeof (Elf_External_Vernaux); | |
2459 | } | |
2460 | ||
2461 | s->_raw_size = size; | |
2462 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, size); | |
2463 | if (s->contents == NULL) | |
2464 | return false; | |
2465 | ||
2466 | p = s->contents; | |
2467 | for (t = elf_tdata (output_bfd)->verref; | |
2468 | t != NULL; | |
2469 | t = t->vn_nextref) | |
2470 | { | |
2471 | unsigned int caux; | |
2472 | Elf_Internal_Vernaux *a; | |
2473 | bfd_size_type indx; | |
2474 | ||
2475 | caux = 0; | |
2476 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2477 | ++caux; | |
2478 | ||
2479 | t->vn_version = VER_NEED_CURRENT; | |
2480 | t->vn_cnt = caux; | |
2481 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2482 | t->vn_bfd->filename, true, false); | |
2483 | if (indx == (bfd_size_type) -1) | |
2484 | return false; | |
2485 | t->vn_file = indx; | |
2486 | t->vn_aux = sizeof (Elf_External_Verneed); | |
2487 | if (t->vn_nextref == NULL) | |
2488 | t->vn_next = 0; | |
2489 | else | |
2490 | t->vn_next = (sizeof (Elf_External_Verneed) | |
2491 | + caux * sizeof (Elf_External_Vernaux)); | |
2492 | ||
2493 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
2494 | (Elf_External_Verneed *) p); | |
2495 | p += sizeof (Elf_External_Verneed); | |
2496 | ||
2497 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2498 | { | |
2499 | a->vna_hash = bfd_elf_hash ((const unsigned char *) | |
2500 | a->vna_nodename); | |
2501 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2502 | a->vna_nodename, true, false); | |
2503 | if (indx == (bfd_size_type) -1) | |
2504 | return false; | |
2505 | a->vna_name = indx; | |
2506 | if (a->vna_nextptr == NULL) | |
2507 | a->vna_next = 0; | |
2508 | else | |
2509 | a->vna_next = sizeof (Elf_External_Vernaux); | |
2510 | ||
2511 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
2512 | (Elf_External_Vernaux *) p); | |
2513 | p += sizeof (Elf_External_Vernaux); | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | if (! elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
2518 | || ! elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
2519 | return false; | |
2520 | ||
2521 | elf_tdata (output_bfd)->cverrefs = crefs; | |
2522 | } | |
2523 | } | |
2524 | ||
2525 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
2526 | ||
2527 | /* Work out the size of the symbol version section. */ | |
2528 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
2529 | BFD_ASSERT (s != NULL); | |
2530 | if (dynsymcount == 0 | |
2531 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
2532 | { | |
2533 | asection **spp; | |
2534 | ||
2535 | /* We don't need any symbol versions; just discard the | |
2536 | section. */ | |
2537 | for (spp = &output_bfd->sections; | |
2538 | *spp != s->output_section; | |
2539 | spp = &(*spp)->next) | |
2540 | ; | |
2541 | *spp = s->output_section->next; | |
2542 | --output_bfd->section_count; | |
2543 | } | |
2544 | else | |
2545 | { | |
d044b40a | 2546 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); |
e549b1d2 | 2547 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
d044b40a ILT |
2548 | if (s->contents == NULL) |
2549 | return false; | |
2550 | ||
d044b40a ILT |
2551 | if (! elf_add_dynamic_entry (info, DT_VERSYM, 0)) |
2552 | return false; | |
2553 | } | |
2554 | ||
ede4eed4 KR |
2555 | /* Set the size of the .dynsym and .hash sections. We counted |
2556 | the number of dynamic symbols in elf_link_add_object_symbols. | |
2557 | We will build the contents of .dynsym and .hash when we build | |
2558 | the final symbol table, because until then we do not know the | |
2559 | correct value to give the symbols. We built the .dynstr | |
2560 | section as we went along in elf_link_add_object_symbols. */ | |
ede4eed4 KR |
2561 | s = bfd_get_section_by_name (dynobj, ".dynsym"); |
2562 | BFD_ASSERT (s != NULL); | |
2563 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
2564 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2565 | if (s->contents == NULL && s->_raw_size != 0) | |
a9713b91 | 2566 | return false; |
ede4eed4 KR |
2567 | |
2568 | /* The first entry in .dynsym is a dummy symbol. */ | |
2569 | isym.st_value = 0; | |
2570 | isym.st_size = 0; | |
2571 | isym.st_name = 0; | |
2572 | isym.st_info = 0; | |
2573 | isym.st_other = 0; | |
2574 | isym.st_shndx = 0; | |
2575 | elf_swap_symbol_out (output_bfd, &isym, | |
cf9fb9f2 | 2576 | (PTR) (Elf_External_Sym *) s->contents); |
ede4eed4 KR |
2577 | |
2578 | for (i = 0; elf_buckets[i] != 0; i++) | |
2579 | { | |
2580 | bucketcount = elf_buckets[i]; | |
2581 | if (dynsymcount < elf_buckets[i + 1]) | |
2582 | break; | |
2583 | } | |
2584 | ||
2585 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
2586 | BFD_ASSERT (s != NULL); | |
2587 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
2588 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2589 | if (s->contents == NULL) | |
a9713b91 | 2590 | return false; |
3fe22b98 | 2591 | memset (s->contents, 0, (size_t) s->_raw_size); |
ede4eed4 KR |
2592 | |
2593 | put_word (output_bfd, bucketcount, s->contents); | |
2594 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
2595 | ||
2596 | elf_hash_table (info)->bucketcount = bucketcount; | |
2597 | ||
2598 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
2599 | BFD_ASSERT (s != NULL); | |
2600 | s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2601 | ||
2602 | if (! elf_add_dynamic_entry (info, DT_NULL, 0)) | |
2603 | return false; | |
2604 | } | |
2605 | ||
2606 | return true; | |
2607 | } | |
3b3753b8 | 2608 | \f |
ede4eed4 KR |
2609 | /* Make the backend pick a good value for a dynamic symbol. This is |
2610 | called via elf_link_hash_traverse, and also calls itself | |
2611 | recursively. */ | |
2612 | ||
2613 | static boolean | |
2614 | elf_adjust_dynamic_symbol (h, data) | |
2615 | struct elf_link_hash_entry *h; | |
2616 | PTR data; | |
2617 | { | |
2618 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2619 | bfd *dynobj; | |
2620 | struct elf_backend_data *bed; | |
2621 | ||
e549b1d2 | 2622 | /* Ignore indirect symbols. These are added by the versioning code. */ |
d044b40a ILT |
2623 | if (h->root.type == bfd_link_hash_indirect) |
2624 | return true; | |
2625 | ||
869b7d80 ILT |
2626 | /* If this symbol was mentioned in a non-ELF file, try to set |
2627 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2628 | permit a non-ELF file to correctly refer to a symbol defined in | |
2629 | an ELF dynamic object. */ | |
2630 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
2631 | { | |
2632 | if (h->root.type != bfd_link_hash_defined | |
2633 | && h->root.type != bfd_link_hash_defweak) | |
2634 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2635 | else | |
2636 | { | |
e303e2e3 ILT |
2637 | if (h->root.u.def.section->owner != NULL |
2638 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2639 | == bfd_target_elf_flavour)) | |
869b7d80 ILT |
2640 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; |
2641 | else | |
2642 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2643 | } | |
2644 | ||
2645 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2646 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
2647 | { | |
2648 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2649 | { | |
2650 | eif->failed = true; | |
2651 | return false; | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | ||
ce6a7731 ILT |
2656 | /* If this is a final link, and the symbol was defined as a common |
2657 | symbol in a regular object file, and there was no definition in | |
2658 | any dynamic object, then the linker will have allocated space for | |
2659 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
2660 | flag will not have been set. */ | |
2661 | if (h->root.type == bfd_link_hash_defined | |
2662 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
2663 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2664 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2665 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
2666 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2667 | ||
951fe66d ILT |
2668 | /* If -Bsymbolic was used (which means to bind references to global |
2669 | symbols to the definition within the shared object), and this | |
2670 | symbol was defined in a regular object, then it actually doesn't | |
2671 | need a PLT entry. */ | |
2672 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
2673 | && eif->info->shared | |
2674 | && eif->info->symbolic | |
2675 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2676 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT; | |
2677 | ||
ede4eed4 KR |
2678 | /* If this symbol does not require a PLT entry, and it is not |
2679 | defined by a dynamic object, or is not referenced by a regular | |
452a5efb ILT |
2680 | object, ignore it. We do have to handle a weak defined symbol, |
2681 | even if no regular object refers to it, if we decided to add it | |
2682 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2683 | about symbols which are defined by one dynamic object and | |
2684 | referenced by another one? */ | |
ede4eed4 KR |
2685 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 |
2686 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
2687 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
452a5efb ILT |
2688 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
2689 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
ede4eed4 KR |
2690 | return true; |
2691 | ||
2692 | /* If we've already adjusted this symbol, don't do it again. This | |
2693 | can happen via a recursive call. */ | |
2694 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
2695 | return true; | |
2696 | ||
2697 | /* Don't look at this symbol again. Note that we must set this | |
2698 | after checking the above conditions, because we may look at a | |
2699 | symbol once, decide not to do anything, and then get called | |
2700 | recursively later after REF_REGULAR is set below. */ | |
2701 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
2702 | ||
2703 | /* If this is a weak definition, and we know a real definition, and | |
2704 | the real symbol is not itself defined by a regular object file, | |
2705 | then get a good value for the real definition. We handle the | |
2706 | real symbol first, for the convenience of the backend routine. | |
2707 | ||
2708 | Note that there is a confusing case here. If the real definition | |
2709 | is defined by a regular object file, we don't get the real symbol | |
2710 | from the dynamic object, but we do get the weak symbol. If the | |
2711 | processor backend uses a COPY reloc, then if some routine in the | |
2712 | dynamic object changes the real symbol, we will not see that | |
2713 | change in the corresponding weak symbol. This is the way other | |
2714 | ELF linkers work as well, and seems to be a result of the shared | |
2715 | library model. | |
2716 | ||
2717 | I will clarify this issue. Most SVR4 shared libraries define the | |
2718 | variable _timezone and define timezone as a weak synonym. The | |
2719 | tzset call changes _timezone. If you write | |
2720 | extern int timezone; | |
2721 | int _timezone = 5; | |
2722 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2723 | you might expect that, since timezone is a synonym for _timezone, | |
2724 | the same number will print both times. However, if the processor | |
2725 | backend uses a COPY reloc, then actually timezone will be copied | |
2726 | into your process image, and, since you define _timezone | |
2727 | yourself, _timezone will not. Thus timezone and _timezone will | |
2728 | wind up at different memory locations. The tzset call will set | |
2729 | _timezone, leaving timezone unchanged. */ | |
2730 | ||
2731 | if (h->weakdef != NULL) | |
2732 | { | |
2733 | struct elf_link_hash_entry *weakdef; | |
2734 | ||
2735 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2736 | || h->root.type == bfd_link_hash_defweak); | |
2737 | weakdef = h->weakdef; | |
2738 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined | |
2739 | || weakdef->root.type == bfd_link_hash_defweak); | |
2740 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
2741 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2742 | { | |
2743 | /* This symbol is defined by a regular object file, so we | |
2744 | will not do anything special. Clear weakdef for the | |
2745 | convenience of the processor backend. */ | |
2746 | h->weakdef = NULL; | |
2747 | } | |
2748 | else | |
2749 | { | |
2750 | /* There is an implicit reference by a regular object file | |
2751 | via the weak symbol. */ | |
2752 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2753 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif)) | |
2754 | return false; | |
2755 | } | |
2756 | } | |
2757 | ||
2758 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2759 | bed = get_elf_backend_data (dynobj); | |
2760 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
2761 | { | |
2762 | eif->failed = true; | |
2763 | return false; | |
2764 | } | |
2765 | ||
2766 | return true; | |
2767 | } | |
2768 | \f | |
d044b40a ILT |
2769 | /* This routine is used to export all defined symbols into the dynamic |
2770 | symbol table. It is called via elf_link_hash_traverse. */ | |
2771 | ||
2772 | static boolean | |
2773 | elf_export_symbol (h, data) | |
2774 | struct elf_link_hash_entry *h; | |
2775 | PTR data; | |
2776 | { | |
2777 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2778 | ||
e549b1d2 ILT |
2779 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2780 | if (h->root.type == bfd_link_hash_indirect) | |
2781 | return true; | |
2782 | ||
d044b40a ILT |
2783 | if (h->dynindx == -1 |
2784 | && (h->elf_link_hash_flags | |
2785 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
2786 | { | |
2787 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2788 | { | |
2789 | eif->failed = true; | |
2790 | return false; | |
2791 | } | |
2792 | } | |
2793 | ||
2794 | return true; | |
2795 | } | |
2796 | \f | |
2797 | /* Look through the symbols which are defined in other shared | |
2798 | libraries and referenced here. Update the list of version | |
2799 | dependencies. This will be put into the .gnu.version_r section. | |
2800 | This function is called via elf_link_hash_traverse. */ | |
2801 | ||
2802 | static boolean | |
2803 | elf_link_find_version_dependencies (h, data) | |
2804 | struct elf_link_hash_entry *h; | |
2805 | PTR data; | |
2806 | { | |
2807 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
2808 | Elf_Internal_Verneed *t; | |
2809 | Elf_Internal_Vernaux *a; | |
2810 | ||
2811 | /* We only care about symbols defined in shared objects with version | |
2812 | information. */ | |
2813 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
a48ef404 | 2814 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
d044b40a ILT |
2815 | || h->dynindx == -1 |
2816 | || h->verinfo.verdef == NULL) | |
2817 | return true; | |
2818 | ||
2819 | /* See if we already know about this version. */ | |
2820 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
2821 | { | |
2822 | if (t->vn_bfd == h->verinfo.verdef->vd_bfd) | |
2823 | continue; | |
2824 | ||
2825 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2826 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2827 | return true; | |
2828 | ||
2829 | break; | |
2830 | } | |
2831 | ||
2832 | /* This is a new version. Add it to tree we are building. */ | |
2833 | ||
2834 | if (t == NULL) | |
2835 | { | |
2836 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, sizeof *t); | |
2837 | if (t == NULL) | |
2838 | { | |
2839 | rinfo->failed = true; | |
2840 | return false; | |
2841 | } | |
2842 | ||
2843 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
2844 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
2845 | elf_tdata (rinfo->output_bfd)->verref = t; | |
2846 | } | |
2847 | ||
2848 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, sizeof *a); | |
2849 | ||
2850 | /* Note that we are copying a string pointer here, and testing it | |
2851 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2852 | discard the string data when low in memory, this will have to be | |
2853 | fixed. */ | |
2854 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2855 | ||
2856 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2857 | a->vna_nextptr = t->vn_auxptr; | |
2858 | ||
2859 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2860 | ++rinfo->vers; | |
2861 | ||
2862 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2863 | ||
2864 | t->vn_auxptr = a; | |
2865 | ||
2866 | return true; | |
2867 | } | |
2868 | ||
2869 | /* Figure out appropriate versions for all the symbols. We may not | |
2870 | have the version number script until we have read all of the input | |
2871 | files, so until that point we don't know which symbols should be | |
2872 | local. This function is called via elf_link_hash_traverse. */ | |
2873 | ||
2874 | static boolean | |
2875 | elf_link_assign_sym_version (h, data) | |
2876 | struct elf_link_hash_entry *h; | |
2877 | PTR data; | |
2878 | { | |
2879 | struct elf_assign_sym_version_info *sinfo = | |
2880 | (struct elf_assign_sym_version_info *) data; | |
2881 | struct bfd_link_info *info = sinfo->info; | |
2882 | char *p; | |
2883 | ||
2884 | /* We only need version numbers for symbols defined in regular | |
2885 | objects. */ | |
2886 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2887 | return true; | |
2888 | ||
2889 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2890 | if (p != NULL && h->verinfo.vertree == NULL) | |
2891 | { | |
2892 | struct bfd_elf_version_tree *t; | |
2893 | boolean hidden; | |
2894 | ||
2895 | hidden = true; | |
2896 | ||
2897 | /* There are two consecutive ELF_VER_CHR characters if this is | |
2898 | not a hidden symbol. */ | |
2899 | ++p; | |
2900 | if (*p == ELF_VER_CHR) | |
2901 | { | |
2902 | hidden = false; | |
2903 | ++p; | |
2904 | } | |
2905 | ||
2906 | /* If there is no version string, we can just return out. */ | |
2907 | if (*p == '\0') | |
2908 | { | |
2909 | if (hidden) | |
2910 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
2911 | return true; | |
2912 | } | |
2913 | ||
2914 | /* Look for the version. If we find it, it is no longer weak. */ | |
2915 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
2916 | { | |
2917 | if (strcmp (t->name, p) == 0) | |
2918 | { | |
2919 | h->verinfo.vertree = t; | |
2920 | t->used = true; | |
d6bfcdb5 ILT |
2921 | |
2922 | /* See if there is anything to force this symbol to | |
2923 | local scope. */ | |
2924 | if (t->locals != NULL) | |
2925 | { | |
2926 | int len; | |
2927 | char *alc; | |
2928 | struct bfd_elf_version_expr *d; | |
2929 | ||
2930 | len = p - h->root.root.string; | |
2931 | alc = bfd_alloc (sinfo->output_bfd, len); | |
2932 | if (alc == NULL) | |
2933 | return false; | |
2934 | strncpy (alc, h->root.root.string, len - 1); | |
2935 | alc[len - 1] = '\0'; | |
2936 | if (alc[len - 2] == ELF_VER_CHR) | |
2937 | alc[len - 2] = '\0'; | |
2938 | ||
2939 | for (d = t->locals; d != NULL; d = d->next) | |
2940 | { | |
2941 | if ((d->match[0] == '*' && d->match[1] == '\0') | |
2942 | || fnmatch (d->match, alc, 0) == 0) | |
2943 | { | |
2944 | if (h->dynindx != -1 | |
2945 | && info->shared | |
2946 | && ! sinfo->export_dynamic | |
2947 | && (h->elf_link_hash_flags | |
2948 | & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
2949 | { | |
2950 | sinfo->removed_dynamic = true; | |
52c92c7f | 2951 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d6bfcdb5 ILT |
2952 | h->dynindx = -1; |
2953 | /* FIXME: The name of the symbol has | |
2954 | already been recorded in the dynamic | |
2955 | string table section. */ | |
2956 | } | |
2957 | ||
2958 | break; | |
2959 | } | |
2960 | } | |
2961 | ||
2962 | bfd_release (sinfo->output_bfd, alc); | |
2963 | } | |
2964 | ||
d044b40a ILT |
2965 | break; |
2966 | } | |
2967 | } | |
2968 | ||
d6bfcdb5 ILT |
2969 | /* If we are building an application, we need to create a |
2970 | version node for this version. */ | |
2971 | if (t == NULL && ! info->shared) | |
2972 | { | |
2973 | struct bfd_elf_version_tree **pp; | |
2974 | int version_index; | |
2975 | ||
2976 | /* If we aren't going to export this symbol, we don't need | |
2977 | to worry about it. */ | |
2978 | if (h->dynindx == -1) | |
2979 | return true; | |
2980 | ||
2981 | t = ((struct bfd_elf_version_tree *) | |
2982 | bfd_alloc (sinfo->output_bfd, sizeof *t)); | |
2983 | if (t == NULL) | |
2984 | { | |
2985 | sinfo->failed = true; | |
2986 | return false; | |
2987 | } | |
2988 | ||
2989 | t->next = NULL; | |
2990 | t->name = p; | |
2991 | t->globals = NULL; | |
2992 | t->locals = NULL; | |
2993 | t->deps = NULL; | |
2994 | t->name_indx = (unsigned int) -1; | |
2995 | t->used = true; | |
2996 | ||
2997 | version_index = 1; | |
2998 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) | |
2999 | ++version_index; | |
3000 | t->vernum = version_index; | |
3001 | ||
3002 | *pp = t; | |
3003 | ||
3004 | h->verinfo.vertree = t; | |
3005 | } | |
3006 | else if (t == NULL) | |
d044b40a | 3007 | { |
d6bfcdb5 ILT |
3008 | /* We could not find the version for a symbol when |
3009 | generating a shared archive. Return an error. */ | |
d044b40a | 3010 | (*_bfd_error_handler) |
52c92c7f ILT |
3011 | ("%s: undefined version name %s", |
3012 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
d044b40a ILT |
3013 | bfd_set_error (bfd_error_bad_value); |
3014 | sinfo->failed = true; | |
3015 | return false; | |
3016 | } | |
3017 | ||
3018 | if (hidden) | |
3019 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
3020 | } | |
3021 | ||
3022 | /* If we don't have a version for this symbol, see if we can find | |
3023 | something. */ | |
3024 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
3025 | { | |
3026 | struct bfd_elf_version_tree *t; | |
3027 | struct bfd_elf_version_tree *deflt; | |
3028 | struct bfd_elf_version_expr *d; | |
3029 | ||
3030 | /* See if can find what version this symbol is in. If the | |
3031 | symbol is supposed to eb local, then don't actually register | |
3032 | it. */ | |
3033 | deflt = NULL; | |
3034 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
3035 | { | |
3036 | if (t->globals != NULL) | |
3037 | { | |
3038 | for (d = t->globals; d != NULL; d = d->next) | |
3039 | { | |
3040 | if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
3041 | { | |
3042 | h->verinfo.vertree = t; | |
3043 | break; | |
3044 | } | |
3045 | } | |
3046 | ||
3047 | if (d != NULL) | |
3048 | break; | |
3049 | } | |
3050 | ||
3051 | if (t->locals != NULL) | |
3052 | { | |
3053 | for (d = t->locals; d != NULL; d = d->next) | |
3054 | { | |
3055 | if (d->match[0] == '*' && d->match[1] == '\0') | |
3056 | deflt = t; | |
3057 | else if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
3058 | { | |
3059 | h->verinfo.vertree = t; | |
3060 | if (h->dynindx != -1 | |
3061 | && info->shared | |
3062 | && ! sinfo->export_dynamic | |
3063 | && (h->elf_link_hash_flags | |
3064 | & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
3065 | { | |
3066 | sinfo->removed_dynamic = true; | |
52c92c7f | 3067 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d044b40a ILT |
3068 | h->dynindx = -1; |
3069 | /* FIXME: The name of the symbol has already | |
3070 | been recorded in the dynamic string table | |
3071 | section. */ | |
3072 | } | |
3073 | break; | |
3074 | } | |
3075 | } | |
3076 | ||
3077 | if (d != NULL) | |
3078 | break; | |
3079 | } | |
3080 | } | |
3081 | ||
3082 | if (deflt != NULL && h->verinfo.vertree == NULL) | |
3083 | { | |
3084 | h->verinfo.vertree = deflt; | |
3085 | if (h->dynindx != -1 | |
3086 | && info->shared | |
3087 | && ! sinfo->export_dynamic | |
3088 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
3089 | { | |
3090 | sinfo->removed_dynamic = true; | |
52c92c7f | 3091 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d044b40a ILT |
3092 | h->dynindx = -1; |
3093 | /* FIXME: The name of the symbol has already been | |
3094 | recorded in the dynamic string table section. */ | |
3095 | } | |
3096 | } | |
3097 | } | |
3098 | ||
3099 | return true; | |
3100 | } | |
3101 | ||
3102 | /* This function is used to renumber the dynamic symbols, if some of | |
3103 | them are removed because they are marked as local. This is called | |
3104 | via elf_link_hash_traverse. */ | |
3105 | ||
3106 | static boolean | |
3107 | elf_link_renumber_dynsyms (h, data) | |
3108 | struct elf_link_hash_entry *h; | |
3109 | PTR data; | |
3110 | { | |
3111 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
3112 | ||
3113 | if (h->dynindx != -1) | |
3114 | { | |
3115 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
3116 | ++elf_hash_table (info)->dynsymcount; | |
3117 | } | |
3118 | ||
3119 | return true; | |
3120 | } | |
3121 | \f | |
ede4eed4 KR |
3122 | /* Final phase of ELF linker. */ |
3123 | ||
3124 | /* A structure we use to avoid passing large numbers of arguments. */ | |
3125 | ||
3126 | struct elf_final_link_info | |
3127 | { | |
3128 | /* General link information. */ | |
3129 | struct bfd_link_info *info; | |
3130 | /* Output BFD. */ | |
3131 | bfd *output_bfd; | |
3132 | /* Symbol string table. */ | |
3133 | struct bfd_strtab_hash *symstrtab; | |
3134 | /* .dynsym section. */ | |
3135 | asection *dynsym_sec; | |
3136 | /* .hash section. */ | |
3137 | asection *hash_sec; | |
d044b40a ILT |
3138 | /* symbol version section (.gnu.version). */ |
3139 | asection *symver_sec; | |
ede4eed4 KR |
3140 | /* Buffer large enough to hold contents of any section. */ |
3141 | bfd_byte *contents; | |
3142 | /* Buffer large enough to hold external relocs of any section. */ | |
3143 | PTR external_relocs; | |
3144 | /* Buffer large enough to hold internal relocs of any section. */ | |
3145 | Elf_Internal_Rela *internal_relocs; | |
3146 | /* Buffer large enough to hold external local symbols of any input | |
3147 | BFD. */ | |
3148 | Elf_External_Sym *external_syms; | |
3149 | /* Buffer large enough to hold internal local symbols of any input | |
3150 | BFD. */ | |
3151 | Elf_Internal_Sym *internal_syms; | |
3152 | /* Array large enough to hold a symbol index for each local symbol | |
3153 | of any input BFD. */ | |
3154 | long *indices; | |
3155 | /* Array large enough to hold a section pointer for each local | |
3156 | symbol of any input BFD. */ | |
3157 | asection **sections; | |
3158 | /* Buffer to hold swapped out symbols. */ | |
3159 | Elf_External_Sym *symbuf; | |
3160 | /* Number of swapped out symbols in buffer. */ | |
3161 | size_t symbuf_count; | |
3162 | /* Number of symbols which fit in symbuf. */ | |
3163 | size_t symbuf_size; | |
3164 | }; | |
3165 | ||
3166 | static boolean elf_link_output_sym | |
3167 | PARAMS ((struct elf_final_link_info *, const char *, | |
3168 | Elf_Internal_Sym *, asection *)); | |
3169 | static boolean elf_link_flush_output_syms | |
3170 | PARAMS ((struct elf_final_link_info *)); | |
3171 | static boolean elf_link_output_extsym | |
3172 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
3173 | static boolean elf_link_input_bfd | |
3174 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
3175 | static boolean elf_reloc_link_order | |
3176 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
3177 | struct bfd_link_order *)); | |
3178 | ||
52c92c7f | 3179 | /* This struct is used to pass information to elf_link_output_extsym. */ |
ede4eed4 | 3180 | |
52c92c7f | 3181 | struct elf_outext_info |
ede4eed4 KR |
3182 | { |
3183 | boolean failed; | |
52c92c7f | 3184 | boolean localsyms; |
ede4eed4 | 3185 | struct elf_final_link_info *finfo; |
ff12f303 | 3186 | }; |
ede4eed4 KR |
3187 | |
3188 | /* Do the final step of an ELF link. */ | |
3189 | ||
3190 | boolean | |
3191 | elf_bfd_final_link (abfd, info) | |
3192 | bfd *abfd; | |
3193 | struct bfd_link_info *info; | |
3194 | { | |
3195 | boolean dynamic; | |
3196 | bfd *dynobj; | |
3197 | struct elf_final_link_info finfo; | |
3198 | register asection *o; | |
3199 | register struct bfd_link_order *p; | |
3200 | register bfd *sub; | |
3201 | size_t max_contents_size; | |
3202 | size_t max_external_reloc_size; | |
3203 | size_t max_internal_reloc_count; | |
3204 | size_t max_sym_count; | |
3205 | file_ptr off; | |
3206 | Elf_Internal_Sym elfsym; | |
3207 | unsigned int i; | |
3208 | Elf_Internal_Shdr *symtab_hdr; | |
3209 | Elf_Internal_Shdr *symstrtab_hdr; | |
3210 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
52c92c7f | 3211 | struct elf_outext_info eoinfo; |
ede4eed4 KR |
3212 | |
3213 | if (info->shared) | |
3214 | abfd->flags |= DYNAMIC; | |
3215 | ||
3216 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
3217 | dynobj = elf_hash_table (info)->dynobj; | |
3218 | ||
3219 | finfo.info = info; | |
3220 | finfo.output_bfd = abfd; | |
3221 | finfo.symstrtab = elf_stringtab_init (); | |
3222 | if (finfo.symstrtab == NULL) | |
3223 | return false; | |
d044b40a | 3224 | |
ede4eed4 KR |
3225 | if (! dynamic) |
3226 | { | |
3227 | finfo.dynsym_sec = NULL; | |
3228 | finfo.hash_sec = NULL; | |
d044b40a | 3229 | finfo.symver_sec = NULL; |
ede4eed4 KR |
3230 | } |
3231 | else | |
3232 | { | |
3233 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3234 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
3235 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
d044b40a ILT |
3236 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); |
3237 | /* Note that it is OK if symver_sec is NULL. */ | |
ede4eed4 | 3238 | } |
d044b40a | 3239 | |
ede4eed4 KR |
3240 | finfo.contents = NULL; |
3241 | finfo.external_relocs = NULL; | |
3242 | finfo.internal_relocs = NULL; | |
3243 | finfo.external_syms = NULL; | |
3244 | finfo.internal_syms = NULL; | |
3245 | finfo.indices = NULL; | |
3246 | finfo.sections = NULL; | |
3247 | finfo.symbuf = NULL; | |
3248 | finfo.symbuf_count = 0; | |
3249 | ||
3250 | /* Count up the number of relocations we will output for each output | |
3251 | section, so that we know the sizes of the reloc sections. We | |
3252 | also figure out some maximum sizes. */ | |
3253 | max_contents_size = 0; | |
3254 | max_external_reloc_size = 0; | |
3255 | max_internal_reloc_count = 0; | |
3256 | max_sym_count = 0; | |
3257 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3258 | { | |
3259 | o->reloc_count = 0; | |
3260 | ||
3261 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3262 | { | |
3263 | if (p->type == bfd_section_reloc_link_order | |
3264 | || p->type == bfd_symbol_reloc_link_order) | |
3265 | ++o->reloc_count; | |
3266 | else if (p->type == bfd_indirect_link_order) | |
3267 | { | |
3268 | asection *sec; | |
3269 | ||
3270 | sec = p->u.indirect.section; | |
3271 | ||
7ec49f91 ILT |
3272 | /* Mark all sections which are to be included in the |
3273 | link. This will normally be every section. We need | |
3274 | to do this so that we can identify any sections which | |
3275 | the linker has decided to not include. */ | |
ff0e4a93 | 3276 | sec->linker_mark = true; |
7ec49f91 | 3277 | |
ede4eed4 KR |
3278 | if (info->relocateable) |
3279 | o->reloc_count += sec->reloc_count; | |
3280 | ||
3281 | if (sec->_raw_size > max_contents_size) | |
3282 | max_contents_size = sec->_raw_size; | |
3283 | if (sec->_cooked_size > max_contents_size) | |
3284 | max_contents_size = sec->_cooked_size; | |
3285 | ||
3286 | /* We are interested in just local symbols, not all | |
3287 | symbols. */ | |
d044b40a ILT |
3288 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
3289 | && (sec->owner->flags & DYNAMIC) == 0) | |
ede4eed4 KR |
3290 | { |
3291 | size_t sym_count; | |
3292 | ||
3293 | if (elf_bad_symtab (sec->owner)) | |
3294 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
3295 | / sizeof (Elf_External_Sym)); | |
3296 | else | |
3297 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
3298 | ||
3299 | if (sym_count > max_sym_count) | |
3300 | max_sym_count = sym_count; | |
3301 | ||
3302 | if ((sec->flags & SEC_RELOC) != 0) | |
3303 | { | |
3304 | size_t ext_size; | |
3305 | ||
3306 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
3307 | if (ext_size > max_external_reloc_size) | |
3308 | max_external_reloc_size = ext_size; | |
3309 | if (sec->reloc_count > max_internal_reloc_count) | |
3310 | max_internal_reloc_count = sec->reloc_count; | |
3311 | } | |
3312 | } | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | if (o->reloc_count > 0) | |
3317 | o->flags |= SEC_RELOC; | |
3318 | else | |
3319 | { | |
3320 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
3321 | set it (this is probably a bug) and if it is set | |
3322 | assign_section_numbers will create a reloc section. */ | |
3323 | o->flags &=~ SEC_RELOC; | |
3324 | } | |
3325 | ||
3326 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
3327 | zero. This is done in elf_fake_sections as well, but forcing | |
3328 | the VMA to 0 here will ensure that relocs against these | |
3329 | sections are handled correctly. */ | |
2e0567eb ILT |
3330 | if ((o->flags & SEC_ALLOC) == 0 |
3331 | && ! o->user_set_vma) | |
ede4eed4 KR |
3332 | o->vma = 0; |
3333 | } | |
3334 | ||
3335 | /* Figure out the file positions for everything but the symbol table | |
3336 | and the relocs. We set symcount to force assign_section_numbers | |
3337 | to create a symbol table. */ | |
3338 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
3339 | BFD_ASSERT (! abfd->output_has_begun); | |
3340 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
3341 | goto error_return; | |
3342 | ||
3343 | /* That created the reloc sections. Set their sizes, and assign | |
3344 | them file positions, and allocate some buffers. */ | |
3345 | for (o = abfd->sections; o != NULL; o = o->next) | |
3346 | { | |
3347 | if ((o->flags & SEC_RELOC) != 0) | |
3348 | { | |
3349 | Elf_Internal_Shdr *rel_hdr; | |
3350 | register struct elf_link_hash_entry **p, **pend; | |
3351 | ||
3352 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3353 | ||
3354 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
3355 | ||
3356 | /* The contents field must last into write_object_contents, | |
3357 | so we allocate it with bfd_alloc rather than malloc. */ | |
3358 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
3359 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
a9713b91 | 3360 | goto error_return; |
ede4eed4 KR |
3361 | |
3362 | p = ((struct elf_link_hash_entry **) | |
58142f10 ILT |
3363 | bfd_malloc (o->reloc_count |
3364 | * sizeof (struct elf_link_hash_entry *))); | |
ede4eed4 | 3365 | if (p == NULL && o->reloc_count != 0) |
58142f10 | 3366 | goto error_return; |
ede4eed4 KR |
3367 | elf_section_data (o)->rel_hashes = p; |
3368 | pend = p + o->reloc_count; | |
3369 | for (; p < pend; p++) | |
3370 | *p = NULL; | |
3371 | ||
3372 | /* Use the reloc_count field as an index when outputting the | |
3373 | relocs. */ | |
3374 | o->reloc_count = 0; | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
3379 | ||
3380 | /* We have now assigned file positions for all the sections except | |
3381 | .symtab and .strtab. We start the .symtab section at the current | |
3382 | file position, and write directly to it. We build the .strtab | |
ab276dfa | 3383 | section in memory. */ |
ede4eed4 KR |
3384 | abfd->symcount = 0; |
3385 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3386 | /* sh_name is set in prep_headers. */ | |
3387 | symtab_hdr->sh_type = SHT_SYMTAB; | |
3388 | symtab_hdr->sh_flags = 0; | |
3389 | symtab_hdr->sh_addr = 0; | |
3390 | symtab_hdr->sh_size = 0; | |
3391 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
3392 | /* sh_link is set in assign_section_numbers. */ | |
3393 | /* sh_info is set below. */ | |
3394 | /* sh_offset is set just below. */ | |
3395 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
3396 | ||
3397 | off = elf_tdata (abfd)->next_file_pos; | |
3398 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); | |
3399 | ||
3400 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
3401 | incorrect. We do not yet know the size of the .symtab section. | |
3402 | We correct next_file_pos below, after we do know the size. */ | |
3403 | ||
3404 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
3405 | continuously seeking to the right position in the file. */ | |
3406 | if (! info->keep_memory || max_sym_count < 20) | |
3407 | finfo.symbuf_size = 20; | |
3408 | else | |
3409 | finfo.symbuf_size = max_sym_count; | |
3410 | finfo.symbuf = ((Elf_External_Sym *) | |
58142f10 | 3411 | bfd_malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); |
ede4eed4 | 3412 | if (finfo.symbuf == NULL) |
58142f10 | 3413 | goto error_return; |
ede4eed4 KR |
3414 | |
3415 | /* Start writing out the symbol table. The first symbol is always a | |
3416 | dummy symbol. */ | |
28c16b55 ILT |
3417 | if (info->strip != strip_all || info->relocateable) |
3418 | { | |
3419 | elfsym.st_value = 0; | |
3420 | elfsym.st_size = 0; | |
3421 | elfsym.st_info = 0; | |
3422 | elfsym.st_other = 0; | |
3423 | elfsym.st_shndx = SHN_UNDEF; | |
3424 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
3425 | &elfsym, bfd_und_section_ptr)) | |
3426 | goto error_return; | |
3427 | } | |
ede4eed4 KR |
3428 | |
3429 | #if 0 | |
3430 | /* Some standard ELF linkers do this, but we don't because it causes | |
3431 | bootstrap comparison failures. */ | |
3432 | /* Output a file symbol for the output file as the second symbol. | |
3433 | We output this even if we are discarding local symbols, although | |
3434 | I'm not sure if this is correct. */ | |
3435 | elfsym.st_value = 0; | |
3436 | elfsym.st_size = 0; | |
3437 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
3438 | elfsym.st_other = 0; | |
3439 | elfsym.st_shndx = SHN_ABS; | |
3440 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
3441 | &elfsym, bfd_abs_section_ptr)) | |
3442 | goto error_return; | |
3443 | #endif | |
3444 | ||
3445 | /* Output a symbol for each section. We output these even if we are | |
3446 | discarding local symbols, since they are used for relocs. These | |
3447 | symbols have no names. We store the index of each one in the | |
3448 | index field of the section, so that we can find it again when | |
3449 | outputting relocs. */ | |
28c16b55 | 3450 | if (info->strip != strip_all || info->relocateable) |
ede4eed4 | 3451 | { |
28c16b55 ILT |
3452 | elfsym.st_size = 0; |
3453 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3454 | elfsym.st_other = 0; | |
3455 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3456 | { | |
3457 | o = section_from_elf_index (abfd, i); | |
3458 | if (o != NULL) | |
3459 | o->target_index = abfd->symcount; | |
3460 | elfsym.st_shndx = i; | |
34bc6ffc ILT |
3461 | if (info->relocateable || o == NULL) |
3462 | elfsym.st_value = 0; | |
3463 | else | |
3464 | elfsym.st_value = o->vma; | |
28c16b55 ILT |
3465 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
3466 | &elfsym, o)) | |
3467 | goto error_return; | |
3468 | } | |
ede4eed4 KR |
3469 | } |
3470 | ||
3471 | /* Allocate some memory to hold information read in from the input | |
3472 | files. */ | |
58142f10 ILT |
3473 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
3474 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
ede4eed4 | 3475 | finfo.internal_relocs = ((Elf_Internal_Rela *) |
58142f10 ILT |
3476 | bfd_malloc (max_internal_reloc_count |
3477 | * sizeof (Elf_Internal_Rela))); | |
ede4eed4 | 3478 | finfo.external_syms = ((Elf_External_Sym *) |
58142f10 ILT |
3479 | bfd_malloc (max_sym_count |
3480 | * sizeof (Elf_External_Sym))); | |
ede4eed4 | 3481 | finfo.internal_syms = ((Elf_Internal_Sym *) |
58142f10 ILT |
3482 | bfd_malloc (max_sym_count |
3483 | * sizeof (Elf_Internal_Sym))); | |
3484 | finfo.indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); | |
3485 | finfo.sections = ((asection **) | |
3486 | bfd_malloc (max_sym_count * sizeof (asection *))); | |
ede4eed4 KR |
3487 | if ((finfo.contents == NULL && max_contents_size != 0) |
3488 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
3489 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
3490 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
3491 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
3492 | || (finfo.indices == NULL && max_sym_count != 0) | |
3493 | || (finfo.sections == NULL && max_sym_count != 0)) | |
58142f10 | 3494 | goto error_return; |
ede4eed4 KR |
3495 | |
3496 | /* Since ELF permits relocations to be against local symbols, we | |
3497 | must have the local symbols available when we do the relocations. | |
3498 | Since we would rather only read the local symbols once, and we | |
3499 | would rather not keep them in memory, we handle all the | |
3500 | relocations for a single input file at the same time. | |
3501 | ||
3502 | Unfortunately, there is no way to know the total number of local | |
3503 | symbols until we have seen all of them, and the local symbol | |
3504 | indices precede the global symbol indices. This means that when | |
3505 | we are generating relocateable output, and we see a reloc against | |
3506 | a global symbol, we can not know the symbol index until we have | |
3507 | finished examining all the local symbols to see which ones we are | |
3508 | going to output. To deal with this, we keep the relocations in | |
3509 | memory, and don't output them until the end of the link. This is | |
3510 | an unfortunate waste of memory, but I don't see a good way around | |
3511 | it. Fortunately, it only happens when performing a relocateable | |
3512 | link, which is not the common case. FIXME: If keep_memory is set | |
3513 | we could write the relocs out and then read them again; I don't | |
3514 | know how bad the memory loss will be. */ | |
3515 | ||
3516 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
3517 | sub->output_has_begun = false; | |
3518 | for (o = abfd->sections; o != NULL; o = o->next) | |
3519 | { | |
3520 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3521 | { | |
3522 | if (p->type == bfd_indirect_link_order | |
3523 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
3524 | == bfd_target_elf_flavour)) | |
3525 | { | |
3526 | sub = p->u.indirect.section->owner; | |
3527 | if (! sub->output_has_begun) | |
3528 | { | |
3529 | if (! elf_link_input_bfd (&finfo, sub)) | |
3530 | goto error_return; | |
3531 | sub->output_has_begun = true; | |
3532 | } | |
3533 | } | |
3534 | else if (p->type == bfd_section_reloc_link_order | |
3535 | || p->type == bfd_symbol_reloc_link_order) | |
3536 | { | |
3537 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
3538 | goto error_return; | |
3539 | } | |
3540 | else | |
3541 | { | |
3542 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3543 | goto error_return; | |
3544 | } | |
3545 | } | |
3546 | } | |
3547 | ||
3548 | /* That wrote out all the local symbols. Finish up the symbol table | |
3549 | with the global symbols. */ | |
3550 | ||
52c92c7f ILT |
3551 | if (info->strip != strip_all && info->shared) |
3552 | { | |
3553 | /* Output any global symbols that got converted to local in a | |
3554 | version script. We do this in a separate step since ELF | |
3555 | requires all local symbols to appear prior to any global | |
3556 | symbols. FIXME: We should only do this if some global | |
3557 | symbols were, in fact, converted to become local. FIXME: | |
3558 | Will this work correctly with the Irix 5 linker? */ | |
3559 | eoinfo.failed = false; | |
3560 | eoinfo.finfo = &finfo; | |
3561 | eoinfo.localsyms = true; | |
3562 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
3563 | (PTR) &eoinfo); | |
3564 | if (eoinfo.failed) | |
3565 | return false; | |
3566 | } | |
3567 | ||
ede4eed4 KR |
3568 | /* The sh_info field records the index of the first non local |
3569 | symbol. */ | |
3570 | symtab_hdr->sh_info = abfd->symcount; | |
3571 | if (dynamic) | |
3572 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
3573 | ||
3574 | /* We get the global symbols from the hash table. */ | |
52c92c7f ILT |
3575 | eoinfo.failed = false; |
3576 | eoinfo.localsyms = false; | |
3577 | eoinfo.finfo = &finfo; | |
ede4eed4 | 3578 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
52c92c7f ILT |
3579 | (PTR) &eoinfo); |
3580 | if (eoinfo.failed) | |
ede4eed4 KR |
3581 | return false; |
3582 | ||
3583 | /* Flush all symbols to the file. */ | |
3584 | if (! elf_link_flush_output_syms (&finfo)) | |
3585 | return false; | |
3586 | ||
3587 | /* Now we know the size of the symtab section. */ | |
3588 | off += symtab_hdr->sh_size; | |
3589 | ||
3590 | /* Finish up and write out the symbol string table (.strtab) | |
3591 | section. */ | |
3592 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
3593 | /* sh_name was set in prep_headers. */ | |
3594 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
3595 | symstrtab_hdr->sh_flags = 0; | |
3596 | symstrtab_hdr->sh_addr = 0; | |
3597 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
3598 | symstrtab_hdr->sh_entsize = 0; | |
3599 | symstrtab_hdr->sh_link = 0; | |
3600 | symstrtab_hdr->sh_info = 0; | |
3601 | /* sh_offset is set just below. */ | |
3602 | symstrtab_hdr->sh_addralign = 1; | |
3603 | ||
3604 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true); | |
3605 | elf_tdata (abfd)->next_file_pos = off; | |
3606 | ||
28c16b55 ILT |
3607 | if (abfd->symcount > 0) |
3608 | { | |
3609 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
3610 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
3611 | return false; | |
3612 | } | |
ede4eed4 KR |
3613 | |
3614 | /* Adjust the relocs to have the correct symbol indices. */ | |
3615 | for (o = abfd->sections; o != NULL; o = o->next) | |
3616 | { | |
3617 | struct elf_link_hash_entry **rel_hash; | |
3618 | Elf_Internal_Shdr *rel_hdr; | |
3619 | ||
3620 | if ((o->flags & SEC_RELOC) == 0) | |
3621 | continue; | |
3622 | ||
3623 | rel_hash = elf_section_data (o)->rel_hashes; | |
3624 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3625 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
3626 | { | |
3627 | if (*rel_hash == NULL) | |
3628 | continue; | |
ff12f303 | 3629 | |
ede4eed4 KR |
3630 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
3631 | ||
3632 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
3633 | { | |
3634 | Elf_External_Rel *erel; | |
3635 | Elf_Internal_Rel irel; | |
3636 | ||
3637 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
3638 | elf_swap_reloc_in (abfd, erel, &irel); | |
3639 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3640 | ELF_R_TYPE (irel.r_info)); | |
3641 | elf_swap_reloc_out (abfd, &irel, erel); | |
3642 | } | |
3643 | else | |
3644 | { | |
3645 | Elf_External_Rela *erela; | |
3646 | Elf_Internal_Rela irela; | |
3647 | ||
3648 | BFD_ASSERT (rel_hdr->sh_entsize | |
3649 | == sizeof (Elf_External_Rela)); | |
3650 | ||
3651 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
3652 | elf_swap_reloca_in (abfd, erela, &irela); | |
3653 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3654 | ELF_R_TYPE (irela.r_info)); | |
3655 | elf_swap_reloca_out (abfd, &irela, erela); | |
3656 | } | |
3657 | } | |
3658 | ||
3659 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
3660 | trying to swap the relocs out itself. */ | |
3661 | o->reloc_count = 0; | |
3662 | } | |
3663 | ||
3664 | /* If we are linking against a dynamic object, or generating a | |
3665 | shared library, finish up the dynamic linking information. */ | |
3666 | if (dynamic) | |
3667 | { | |
3668 | Elf_External_Dyn *dyncon, *dynconend; | |
3669 | ||
3670 | /* Fix up .dynamic entries. */ | |
3671 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3672 | BFD_ASSERT (o != NULL); | |
3673 | ||
3674 | dyncon = (Elf_External_Dyn *) o->contents; | |
3675 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
3676 | for (; dyncon < dynconend; dyncon++) | |
3677 | { | |
3678 | Elf_Internal_Dyn dyn; | |
3679 | const char *name; | |
3680 | unsigned int type; | |
3681 | ||
3682 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
3683 | ||
3684 | switch (dyn.d_tag) | |
3685 | { | |
3686 | default: | |
3687 | break; | |
3688 | ||
3689 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on | |
3690 | magic _init and _fini symbols. This is pretty ugly, | |
3691 | but we are compatible. */ | |
3692 | case DT_INIT: | |
3693 | name = "_init"; | |
3694 | goto get_sym; | |
3695 | case DT_FINI: | |
3696 | name = "_fini"; | |
3697 | get_sym: | |
3698 | { | |
3699 | struct elf_link_hash_entry *h; | |
3700 | ||
3701 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
3702 | false, false, true); | |
d6f672b8 ILT |
3703 | if (h != NULL |
3704 | && (h->root.type == bfd_link_hash_defined | |
3705 | || h->root.type == bfd_link_hash_defweak)) | |
ede4eed4 KR |
3706 | { |
3707 | dyn.d_un.d_val = h->root.u.def.value; | |
3708 | o = h->root.u.def.section; | |
3709 | if (o->output_section != NULL) | |
3710 | dyn.d_un.d_val += (o->output_section->vma | |
3711 | + o->output_offset); | |
3712 | else | |
d6f672b8 ILT |
3713 | { |
3714 | /* The symbol is imported from another shared | |
3715 | library and does not apply to this one. */ | |
3716 | dyn.d_un.d_val = 0; | |
3717 | } | |
3718 | ||
3719 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
ede4eed4 | 3720 | } |
ede4eed4 KR |
3721 | } |
3722 | break; | |
3723 | ||
3724 | case DT_HASH: | |
3725 | name = ".hash"; | |
3726 | goto get_vma; | |
3727 | case DT_STRTAB: | |
3728 | name = ".dynstr"; | |
3729 | goto get_vma; | |
3730 | case DT_SYMTAB: | |
3731 | name = ".dynsym"; | |
d044b40a ILT |
3732 | goto get_vma; |
3733 | case DT_VERDEF: | |
3734 | name = ".gnu.version_d"; | |
3735 | goto get_vma; | |
3736 | case DT_VERNEED: | |
3737 | name = ".gnu.version_r"; | |
3738 | goto get_vma; | |
3739 | case DT_VERSYM: | |
3740 | name = ".gnu.version"; | |
ede4eed4 KR |
3741 | get_vma: |
3742 | o = bfd_get_section_by_name (abfd, name); | |
3743 | BFD_ASSERT (o != NULL); | |
3744 | dyn.d_un.d_ptr = o->vma; | |
3745 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3746 | break; | |
3747 | ||
3748 | case DT_REL: | |
3749 | case DT_RELA: | |
3750 | case DT_RELSZ: | |
3751 | case DT_RELASZ: | |
3752 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
3753 | type = SHT_REL; | |
3754 | else | |
3755 | type = SHT_RELA; | |
3756 | dyn.d_un.d_val = 0; | |
3757 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3758 | { | |
3759 | Elf_Internal_Shdr *hdr; | |
3760 | ||
3761 | hdr = elf_elfsections (abfd)[i]; | |
3762 | if (hdr->sh_type == type | |
3763 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
3764 | { | |
3765 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
3766 | dyn.d_un.d_val += hdr->sh_size; | |
3767 | else | |
3768 | { | |
3769 | if (dyn.d_un.d_val == 0 | |
3770 | || hdr->sh_addr < dyn.d_un.d_val) | |
3771 | dyn.d_un.d_val = hdr->sh_addr; | |
3772 | } | |
3773 | } | |
3774 | } | |
3775 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3776 | break; | |
3777 | } | |
3778 | } | |
3779 | } | |
3780 | ||
3781 | /* If we have created any dynamic sections, then output them. */ | |
3782 | if (dynobj != NULL) | |
3783 | { | |
3784 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
3785 | goto error_return; | |
3786 | ||
3787 | for (o = dynobj->sections; o != NULL; o = o->next) | |
3788 | { | |
3789 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
3790 | || o->_raw_size == 0) | |
3791 | continue; | |
ff12f303 | 3792 | if ((o->flags & SEC_LINKER_CREATED) == 0) |
ede4eed4 KR |
3793 | { |
3794 | /* At this point, we are only interested in sections | |
ff12f303 | 3795 | created by elf_link_create_dynamic_sections. */ |
ede4eed4 KR |
3796 | continue; |
3797 | } | |
3798 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
3799 | != SHT_STRTAB) | |
3800 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
3801 | { | |
3802 | if (! bfd_set_section_contents (abfd, o->output_section, | |
3803 | o->contents, o->output_offset, | |
3804 | o->_raw_size)) | |
3805 | goto error_return; | |
3806 | } | |
3807 | else | |
3808 | { | |
3809 | file_ptr off; | |
3810 | ||
3811 | /* The contents of the .dynstr section are actually in a | |
3812 | stringtab. */ | |
3813 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; | |
3814 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
3815 | || ! _bfd_stringtab_emit (abfd, | |
3816 | elf_hash_table (info)->dynstr)) | |
3817 | goto error_return; | |
3818 | } | |
3819 | } | |
3820 | } | |
3821 | ||
1726b8f0 ILT |
3822 | /* If we have optimized stabs strings, output them. */ |
3823 | if (elf_hash_table (info)->stab_info != NULL) | |
3824 | { | |
3825 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
3826 | goto error_return; | |
3827 | } | |
3828 | ||
ede4eed4 KR |
3829 | if (finfo.symstrtab != NULL) |
3830 | _bfd_stringtab_free (finfo.symstrtab); | |
3831 | if (finfo.contents != NULL) | |
3832 | free (finfo.contents); | |
3833 | if (finfo.external_relocs != NULL) | |
3834 | free (finfo.external_relocs); | |
3835 | if (finfo.internal_relocs != NULL) | |
3836 | free (finfo.internal_relocs); | |
3837 | if (finfo.external_syms != NULL) | |
3838 | free (finfo.external_syms); | |
3839 | if (finfo.internal_syms != NULL) | |
3840 | free (finfo.internal_syms); | |
3841 | if (finfo.indices != NULL) | |
3842 | free (finfo.indices); | |
3843 | if (finfo.sections != NULL) | |
3844 | free (finfo.sections); | |
3845 | if (finfo.symbuf != NULL) | |
3846 | free (finfo.symbuf); | |
3847 | for (o = abfd->sections; o != NULL; o = o->next) | |
3848 | { | |
3849 | if ((o->flags & SEC_RELOC) != 0 | |
3850 | && elf_section_data (o)->rel_hashes != NULL) | |
3851 | free (elf_section_data (o)->rel_hashes); | |
3852 | } | |
3853 | ||
3854 | elf_tdata (abfd)->linker = true; | |
3855 | ||
3856 | return true; | |
3857 | ||
3858 | error_return: | |
3859 | if (finfo.symstrtab != NULL) | |
3860 | _bfd_stringtab_free (finfo.symstrtab); | |
3861 | if (finfo.contents != NULL) | |
3862 | free (finfo.contents); | |
3863 | if (finfo.external_relocs != NULL) | |
3864 | free (finfo.external_relocs); | |
3865 | if (finfo.internal_relocs != NULL) | |
3866 | free (finfo.internal_relocs); | |
3867 | if (finfo.external_syms != NULL) | |
3868 | free (finfo.external_syms); | |
3869 | if (finfo.internal_syms != NULL) | |
3870 | free (finfo.internal_syms); | |
3871 | if (finfo.indices != NULL) | |
3872 | free (finfo.indices); | |
3873 | if (finfo.sections != NULL) | |
3874 | free (finfo.sections); | |
3875 | if (finfo.symbuf != NULL) | |
3876 | free (finfo.symbuf); | |
3877 | for (o = abfd->sections; o != NULL; o = o->next) | |
3878 | { | |
3879 | if ((o->flags & SEC_RELOC) != 0 | |
3880 | && elf_section_data (o)->rel_hashes != NULL) | |
3881 | free (elf_section_data (o)->rel_hashes); | |
3882 | } | |
3883 | ||
3884 | return false; | |
3885 | } | |
3886 | ||
3887 | /* Add a symbol to the output symbol table. */ | |
3888 | ||
3889 | static boolean | |
3890 | elf_link_output_sym (finfo, name, elfsym, input_sec) | |
3891 | struct elf_final_link_info *finfo; | |
3892 | const char *name; | |
3893 | Elf_Internal_Sym *elfsym; | |
3894 | asection *input_sec; | |
3895 | { | |
3896 | boolean (*output_symbol_hook) PARAMS ((bfd *, | |
3897 | struct bfd_link_info *info, | |
3898 | const char *, | |
3899 | Elf_Internal_Sym *, | |
3900 | asection *)); | |
3901 | ||
3902 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
3903 | elf_backend_link_output_symbol_hook; | |
3904 | if (output_symbol_hook != NULL) | |
3905 | { | |
3906 | if (! ((*output_symbol_hook) | |
3907 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
3908 | return false; | |
3909 | } | |
3910 | ||
3911 | if (name == (const char *) NULL || *name == '\0') | |
3912 | elfsym->st_name = 0; | |
3913 | else | |
3914 | { | |
3915 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
3916 | name, true, | |
3917 | false); | |
3918 | if (elfsym->st_name == (unsigned long) -1) | |
3919 | return false; | |
3920 | } | |
3921 | ||
3922 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
3923 | { | |
3924 | if (! elf_link_flush_output_syms (finfo)) | |
3925 | return false; | |
3926 | } | |
3927 | ||
3928 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
cf9fb9f2 | 3929 | (PTR) (finfo->symbuf + finfo->symbuf_count)); |
ede4eed4 KR |
3930 | ++finfo->symbuf_count; |
3931 | ||
3932 | ++finfo->output_bfd->symcount; | |
3933 | ||
3934 | return true; | |
3935 | } | |
3936 | ||
3937 | /* Flush the output symbols to the file. */ | |
3938 | ||
3939 | static boolean | |
3940 | elf_link_flush_output_syms (finfo) | |
3941 | struct elf_final_link_info *finfo; | |
3942 | { | |
28c16b55 ILT |
3943 | if (finfo->symbuf_count > 0) |
3944 | { | |
3945 | Elf_Internal_Shdr *symtab; | |
ede4eed4 | 3946 | |
28c16b55 | 3947 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
ede4eed4 | 3948 | |
28c16b55 ILT |
3949 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, |
3950 | SEEK_SET) != 0 | |
3951 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
3952 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
3953 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
3954 | return false; | |
ede4eed4 | 3955 | |
28c16b55 | 3956 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); |
ede4eed4 | 3957 | |
28c16b55 ILT |
3958 | finfo->symbuf_count = 0; |
3959 | } | |
ede4eed4 KR |
3960 | |
3961 | return true; | |
3962 | } | |
3963 | ||
3964 | /* Add an external symbol to the symbol table. This is called from | |
52c92c7f ILT |
3965 | the hash table traversal routine. When generating a shared object, |
3966 | we go through the symbol table twice. The first time we output | |
3967 | anything that might have been forced to local scope in a version | |
3968 | script. The second time we output the symbols that are still | |
3969 | global symbols. */ | |
ede4eed4 KR |
3970 | |
3971 | static boolean | |
3972 | elf_link_output_extsym (h, data) | |
3973 | struct elf_link_hash_entry *h; | |
3974 | PTR data; | |
3975 | { | |
52c92c7f ILT |
3976 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
3977 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
ede4eed4 KR |
3978 | boolean strip; |
3979 | Elf_Internal_Sym sym; | |
3980 | asection *input_sec; | |
3981 | ||
52c92c7f ILT |
3982 | /* Decide whether to output this symbol in this pass. */ |
3983 | if (eoinfo->localsyms) | |
3984 | { | |
3985 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3986 | return true; | |
3987 | } | |
3988 | else | |
3989 | { | |
3990 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
3991 | return true; | |
3992 | } | |
3993 | ||
ede4eed4 KR |
3994 | /* If we are not creating a shared library, and this symbol is |
3995 | referenced by a shared library but is not defined anywhere, then | |
3996 | warn that it is undefined. If we do not do this, the runtime | |
3997 | linker will complain that the symbol is undefined when the | |
3998 | program is run. We don't have to worry about symbols that are | |
3999 | referenced by regular files, because we will already have issued | |
252239f8 | 4000 | warnings for them. */ |
ede4eed4 KR |
4001 | if (! finfo->info->relocateable |
4002 | && ! finfo->info->shared | |
4003 | && h->root.type == bfd_link_hash_undefined | |
4004 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
252239f8 | 4005 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
ede4eed4 KR |
4006 | { |
4007 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
4008 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
4009 | (asection *) NULL, 0))) | |
4010 | { | |
52c92c7f | 4011 | eoinfo->failed = true; |
ede4eed4 KR |
4012 | return false; |
4013 | } | |
4014 | } | |
4015 | ||
4016 | /* We don't want to output symbols that have never been mentioned by | |
4017 | a regular file, or that we have been told to strip. However, if | |
4018 | h->indx is set to -2, the symbol is used by a reloc and we must | |
4019 | output it. */ | |
4020 | if (h->indx == -2) | |
4021 | strip = false; | |
4022 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4023 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
4024 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
4025 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4026 | strip = true; | |
4027 | else if (finfo->info->strip == strip_all | |
4028 | || (finfo->info->strip == strip_some | |
4029 | && bfd_hash_lookup (finfo->info->keep_hash, | |
4030 | h->root.root.string, | |
4031 | false, false) == NULL)) | |
4032 | strip = true; | |
4033 | else | |
4034 | strip = false; | |
4035 | ||
4036 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
4037 | nothing else to do. */ | |
4038 | if (strip && h->dynindx == -1) | |
4039 | return true; | |
4040 | ||
4041 | sym.st_value = 0; | |
4042 | sym.st_size = h->size; | |
6c02f1a0 | 4043 | sym.st_other = h->other; |
52c92c7f ILT |
4044 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) |
4045 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
4046 | else if (h->root.type == bfd_link_hash_undefweak | |
4047 | || h->root.type == bfd_link_hash_defweak) | |
ede4eed4 KR |
4048 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); |
4049 | else | |
4050 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
4051 | ||
4052 | switch (h->root.type) | |
4053 | { | |
4054 | default: | |
4055 | case bfd_link_hash_new: | |
4056 | abort (); | |
4057 | return false; | |
4058 | ||
4059 | case bfd_link_hash_undefined: | |
4060 | input_sec = bfd_und_section_ptr; | |
4061 | sym.st_shndx = SHN_UNDEF; | |
4062 | break; | |
4063 | ||
4064 | case bfd_link_hash_undefweak: | |
4065 | input_sec = bfd_und_section_ptr; | |
4066 | sym.st_shndx = SHN_UNDEF; | |
4067 | break; | |
4068 | ||
4069 | case bfd_link_hash_defined: | |
4070 | case bfd_link_hash_defweak: | |
4071 | { | |
4072 | input_sec = h->root.u.def.section; | |
4073 | if (input_sec->output_section != NULL) | |
4074 | { | |
4075 | sym.st_shndx = | |
4076 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
4077 | input_sec->output_section); | |
4078 | if (sym.st_shndx == (unsigned short) -1) | |
4079 | { | |
52c92c7f | 4080 | eoinfo->failed = true; |
ede4eed4 KR |
4081 | return false; |
4082 | } | |
4083 | ||
4084 | /* ELF symbols in relocateable files are section relative, | |
4085 | but in nonrelocateable files they are virtual | |
4086 | addresses. */ | |
4087 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
4088 | if (! finfo->info->relocateable) | |
4089 | sym.st_value += input_sec->output_section->vma; | |
4090 | } | |
4091 | else | |
4092 | { | |
e549b1d2 ILT |
4093 | BFD_ASSERT (input_sec->owner == NULL |
4094 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
ede4eed4 KR |
4095 | sym.st_shndx = SHN_UNDEF; |
4096 | input_sec = bfd_und_section_ptr; | |
4097 | } | |
4098 | } | |
4099 | break; | |
4100 | ||
4101 | case bfd_link_hash_common: | |
4102 | input_sec = bfd_com_section_ptr; | |
4103 | sym.st_shndx = SHN_COMMON; | |
4104 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
4105 | break; | |
4106 | ||
4107 | case bfd_link_hash_indirect: | |
d044b40a ILT |
4108 | /* These symbols are created by symbol versioning. They point |
4109 | to the decorated version of the name. For example, if the | |
4110 | symbol foo@@GNU_1.2 is the default, which should be used when | |
4111 | foo is used with no version, then we add an indirect symbol | |
d6bfcdb5 ILT |
4112 | foo which points to foo@@GNU_1.2. We ignore these symbols, |
4113 | since the indirected symbol is already in the hash table. If | |
4114 | the indirect symbol is non-ELF, fall through and output it. */ | |
4115 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) == 0) | |
d044b40a ILT |
4116 | return true; |
4117 | ||
4118 | /* Fall through. */ | |
ede4eed4 | 4119 | case bfd_link_hash_warning: |
d044b40a ILT |
4120 | /* We can't represent these symbols in ELF, although a warning |
4121 | symbol may have come from a .gnu.warning.SYMBOL section. We | |
1f4ae0d6 ILT |
4122 | just put the target symbol in the hash table. If the target |
4123 | symbol does not really exist, don't do anything. */ | |
4124 | if (h->root.u.i.link->type == bfd_link_hash_new) | |
4125 | return true; | |
0cb70568 ILT |
4126 | return (elf_link_output_extsym |
4127 | ((struct elf_link_hash_entry *) h->root.u.i.link, data)); | |
ede4eed4 KR |
4128 | } |
4129 | ||
4130 | /* If this symbol should be put in the .dynsym section, then put it | |
4131 | there now. We have already know the symbol index. We also fill | |
4132 | in the entry in the .hash section. */ | |
4133 | if (h->dynindx != -1 | |
4134 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
4135 | { | |
4136 | struct elf_backend_data *bed; | |
d044b40a ILT |
4137 | char *p, *copy; |
4138 | const char *name; | |
ede4eed4 KR |
4139 | size_t bucketcount; |
4140 | size_t bucket; | |
4141 | bfd_byte *bucketpos; | |
4142 | bfd_vma chain; | |
4143 | ||
4144 | sym.st_name = h->dynstr_index; | |
4145 | ||
4146 | /* Give the processor backend a chance to tweak the symbol | |
4147 | value, and also to finish up anything that needs to be done | |
4148 | for this symbol. */ | |
4149 | bed = get_elf_backend_data (finfo->output_bfd); | |
4150 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
4151 | (finfo->output_bfd, finfo->info, h, &sym))) | |
4152 | { | |
52c92c7f | 4153 | eoinfo->failed = true; |
ede4eed4 KR |
4154 | return false; |
4155 | } | |
4156 | ||
4157 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
cf9fb9f2 ILT |
4158 | (PTR) (((Elf_External_Sym *) |
4159 | finfo->dynsym_sec->contents) | |
4160 | + h->dynindx)); | |
ede4eed4 | 4161 | |
d044b40a ILT |
4162 | /* We didn't include the version string in the dynamic string |
4163 | table, so we must not consider it in the hash table. */ | |
4164 | name = h->root.root.string; | |
4165 | p = strchr (name, ELF_VER_CHR); | |
4166 | if (p == NULL) | |
4167 | copy = NULL; | |
4168 | else | |
4169 | { | |
4170 | copy = bfd_alloc (finfo->output_bfd, p - name + 1); | |
4171 | strncpy (copy, name, p - name); | |
4172 | copy[p - name] = '\0'; | |
4173 | name = copy; | |
4174 | } | |
4175 | ||
ede4eed4 | 4176 | bucketcount = elf_hash_table (finfo->info)->bucketcount; |
d044b40a | 4177 | bucket = bfd_elf_hash ((const unsigned char *) name) % bucketcount; |
ede4eed4 KR |
4178 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
4179 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
4180 | chain = get_word (finfo->output_bfd, bucketpos); | |
4181 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
4182 | put_word (finfo->output_bfd, chain, | |
4183 | ((bfd_byte *) finfo->hash_sec->contents | |
4184 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
d044b40a ILT |
4185 | |
4186 | if (copy != NULL) | |
4187 | bfd_release (finfo->output_bfd, copy); | |
4188 | ||
4189 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
4190 | { | |
4191 | Elf_Internal_Versym iversym; | |
4192 | ||
4193 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4194 | { | |
4195 | if (h->verinfo.verdef == NULL) | |
4196 | iversym.vs_vers = 0; | |
4197 | else | |
4198 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
4199 | } | |
4200 | else | |
4201 | { | |
4202 | if (h->verinfo.vertree == NULL) | |
4203 | iversym.vs_vers = 1; | |
4204 | else | |
4205 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
4206 | } | |
4207 | ||
4208 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
4209 | iversym.vs_vers |= VERSYM_HIDDEN; | |
4210 | ||
4211 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, | |
4212 | (((Elf_External_Versym *) | |
4213 | finfo->symver_sec->contents) | |
4214 | + h->dynindx)); | |
4215 | } | |
ede4eed4 KR |
4216 | } |
4217 | ||
4218 | /* If we're stripping it, then it was just a dynamic symbol, and | |
4219 | there's nothing else to do. */ | |
4220 | if (strip) | |
4221 | return true; | |
4222 | ||
4223 | h->indx = finfo->output_bfd->symcount; | |
4224 | ||
4225 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
4226 | { | |
52c92c7f | 4227 | eoinfo->failed = true; |
ede4eed4 KR |
4228 | return false; |
4229 | } | |
4230 | ||
4231 | return true; | |
4232 | } | |
4233 | ||
4234 | /* Link an input file into the linker output file. This function | |
4235 | handles all the sections and relocations of the input file at once. | |
4236 | This is so that we only have to read the local symbols once, and | |
4237 | don't have to keep them in memory. */ | |
4238 | ||
4239 | static boolean | |
4240 | elf_link_input_bfd (finfo, input_bfd) | |
4241 | struct elf_final_link_info *finfo; | |
4242 | bfd *input_bfd; | |
4243 | { | |
4244 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
4245 | bfd *, asection *, bfd_byte *, | |
4246 | Elf_Internal_Rela *, | |
4247 | Elf_Internal_Sym *, asection **)); | |
4248 | bfd *output_bfd; | |
4249 | Elf_Internal_Shdr *symtab_hdr; | |
4250 | size_t locsymcount; | |
4251 | size_t extsymoff; | |
c86158e5 | 4252 | Elf_External_Sym *external_syms; |
ede4eed4 KR |
4253 | Elf_External_Sym *esym; |
4254 | Elf_External_Sym *esymend; | |
4255 | Elf_Internal_Sym *isym; | |
4256 | long *pindex; | |
4257 | asection **ppsection; | |
4258 | asection *o; | |
4259 | ||
4260 | output_bfd = finfo->output_bfd; | |
4261 | relocate_section = | |
4262 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
4263 | ||
4264 | /* If this is a dynamic object, we don't want to do anything here: | |
4265 | we don't want the local symbols, and we don't want the section | |
4266 | contents. */ | |
d044b40a | 4267 | if ((input_bfd->flags & DYNAMIC) != 0) |
ede4eed4 KR |
4268 | return true; |
4269 | ||
4270 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4271 | if (elf_bad_symtab (input_bfd)) | |
4272 | { | |
4273 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
4274 | extsymoff = 0; | |
4275 | } | |
4276 | else | |
4277 | { | |
4278 | locsymcount = symtab_hdr->sh_info; | |
4279 | extsymoff = symtab_hdr->sh_info; | |
4280 | } | |
4281 | ||
4282 | /* Read the local symbols. */ | |
c86158e5 ILT |
4283 | if (symtab_hdr->contents != NULL) |
4284 | external_syms = (Elf_External_Sym *) symtab_hdr->contents; | |
4285 | else if (locsymcount == 0) | |
4286 | external_syms = NULL; | |
4287 | else | |
4288 | { | |
4289 | external_syms = finfo->external_syms; | |
4290 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
4291 | || (bfd_read (external_syms, sizeof (Elf_External_Sym), | |
ede4eed4 | 4292 | locsymcount, input_bfd) |
c86158e5 ILT |
4293 | != locsymcount * sizeof (Elf_External_Sym))) |
4294 | return false; | |
4295 | } | |
ede4eed4 KR |
4296 | |
4297 | /* Swap in the local symbols and write out the ones which we know | |
4298 | are going into the output file. */ | |
c86158e5 | 4299 | esym = external_syms; |
ede4eed4 KR |
4300 | esymend = esym + locsymcount; |
4301 | isym = finfo->internal_syms; | |
4302 | pindex = finfo->indices; | |
4303 | ppsection = finfo->sections; | |
4304 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
4305 | { | |
4306 | asection *isec; | |
4307 | const char *name; | |
4308 | Elf_Internal_Sym osym; | |
4309 | ||
4310 | elf_swap_symbol_in (input_bfd, esym, isym); | |
4311 | *pindex = -1; | |
4312 | ||
4313 | if (elf_bad_symtab (input_bfd)) | |
4314 | { | |
4315 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
4316 | { | |
4317 | *ppsection = NULL; | |
4318 | continue; | |
4319 | } | |
4320 | } | |
4321 | ||
4322 | if (isym->st_shndx == SHN_UNDEF) | |
4323 | isec = bfd_und_section_ptr; | |
4324 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) | |
4325 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
4326 | else if (isym->st_shndx == SHN_ABS) | |
4327 | isec = bfd_abs_section_ptr; | |
4328 | else if (isym->st_shndx == SHN_COMMON) | |
4329 | isec = bfd_com_section_ptr; | |
4330 | else | |
4331 | { | |
4332 | /* Who knows? */ | |
4333 | isec = NULL; | |
4334 | } | |
4335 | ||
4336 | *ppsection = isec; | |
4337 | ||
4338 | /* Don't output the first, undefined, symbol. */ | |
c86158e5 | 4339 | if (esym == external_syms) |
ede4eed4 KR |
4340 | continue; |
4341 | ||
4342 | /* If we are stripping all symbols, we don't want to output this | |
4343 | one. */ | |
4344 | if (finfo->info->strip == strip_all) | |
4345 | continue; | |
4346 | ||
4347 | /* We never output section symbols. Instead, we use the section | |
4348 | symbol of the corresponding section in the output file. */ | |
4349 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4350 | continue; | |
4351 | ||
4352 | /* If we are discarding all local symbols, we don't want to | |
4353 | output this one. If we are generating a relocateable output | |
4354 | file, then some of the local symbols may be required by | |
4355 | relocs; we output them below as we discover that they are | |
4356 | needed. */ | |
4357 | if (finfo->info->discard == discard_all) | |
4358 | continue; | |
4359 | ||
258b1f5d | 4360 | /* If this symbol is defined in a section which we are |
fa802cb0 ILT |
4361 | discarding, we don't need to keep it, but note that |
4362 | linker_mark is only reliable for sections that have contents. | |
4363 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
4364 | as well as linker_mark. */ | |
258b1f5d ILT |
4365 | if (isym->st_shndx > 0 |
4366 | && isym->st_shndx < SHN_LORESERVE | |
4367 | && isec != NULL | |
fa802cb0 | 4368 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) |
258b1f5d ILT |
4369 | || (! finfo->info->relocateable |
4370 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
4371 | continue; | |
4372 | ||
ede4eed4 KR |
4373 | /* Get the name of the symbol. */ |
4374 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
258b1f5d | 4375 | isym->st_name); |
ede4eed4 KR |
4376 | if (name == NULL) |
4377 | return false; | |
4378 | ||
4379 | /* See if we are discarding symbols with this name. */ | |
4380 | if ((finfo->info->strip == strip_some | |
4381 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
4382 | == NULL)) | |
4383 | || (finfo->info->discard == discard_l | |
e316f514 | 4384 | && bfd_is_local_label_name (input_bfd, name))) |
ede4eed4 KR |
4385 | continue; |
4386 | ||
4387 | /* If we get here, we are going to output this symbol. */ | |
4388 | ||
4389 | osym = *isym; | |
4390 | ||
4391 | /* Adjust the section index for the output file. */ | |
4392 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
4393 | isec->output_section); | |
4394 | if (osym.st_shndx == (unsigned short) -1) | |
4395 | return false; | |
4396 | ||
4397 | *pindex = output_bfd->symcount; | |
4398 | ||
4399 | /* ELF symbols in relocateable files are section relative, but | |
4400 | in executable files they are virtual addresses. Note that | |
4401 | this code assumes that all ELF sections have an associated | |
4402 | BFD section with a reasonable value for output_offset; below | |
4403 | we assume that they also have a reasonable value for | |
4404 | output_section. Any special sections must be set up to meet | |
4405 | these requirements. */ | |
4406 | osym.st_value += isec->output_offset; | |
4407 | if (! finfo->info->relocateable) | |
4408 | osym.st_value += isec->output_section->vma; | |
4409 | ||
4410 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
4411 | return false; | |
4412 | } | |
4413 | ||
4414 | /* Relocate the contents of each section. */ | |
4415 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
4416 | { | |
c86158e5 ILT |
4417 | bfd_byte *contents; |
4418 | ||
ff0e4a93 | 4419 | if (! o->linker_mark) |
7ec49f91 ILT |
4420 | { |
4421 | /* This section was omitted from the link. */ | |
4422 | continue; | |
4423 | } | |
4424 | ||
1726b8f0 ILT |
4425 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
4426 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
ede4eed4 KR |
4427 | continue; |
4428 | ||
ff12f303 | 4429 | if ((o->flags & SEC_LINKER_CREATED) != 0) |
ede4eed4 | 4430 | { |
ff12f303 ILT |
4431 | /* Section was created by elf_link_create_dynamic_sections |
4432 | or somesuch. */ | |
ede4eed4 KR |
4433 | continue; |
4434 | } | |
4435 | ||
c86158e5 ILT |
4436 | /* Get the contents of the section. They have been cached by a |
4437 | relaxation routine. Note that o is a section in an input | |
4438 | file, so the contents field will not have been set by any of | |
4439 | the routines which work on output files. */ | |
4440 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
4441 | contents = elf_section_data (o)->this_hdr.contents; | |
4442 | else | |
4443 | { | |
4444 | contents = finfo->contents; | |
4445 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
4446 | (file_ptr) 0, o->_raw_size)) | |
4447 | return false; | |
4448 | } | |
ede4eed4 KR |
4449 | |
4450 | if ((o->flags & SEC_RELOC) != 0) | |
4451 | { | |
4452 | Elf_Internal_Rela *internal_relocs; | |
4453 | ||
4454 | /* Get the swapped relocs. */ | |
c86158e5 ILT |
4455 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
4456 | (input_bfd, o, finfo->external_relocs, | |
4457 | finfo->internal_relocs, false)); | |
ede4eed4 KR |
4458 | if (internal_relocs == NULL |
4459 | && o->reloc_count > 0) | |
4460 | return false; | |
4461 | ||
4462 | /* Relocate the section by invoking a back end routine. | |
4463 | ||
4464 | The back end routine is responsible for adjusting the | |
4465 | section contents as necessary, and (if using Rela relocs | |
4466 | and generating a relocateable output file) adjusting the | |
4467 | reloc addend as necessary. | |
4468 | ||
4469 | The back end routine does not have to worry about setting | |
4470 | the reloc address or the reloc symbol index. | |
4471 | ||
4472 | The back end routine is given a pointer to the swapped in | |
4473 | internal symbols, and can access the hash table entries | |
4474 | for the external symbols via elf_sym_hashes (input_bfd). | |
4475 | ||
4476 | When generating relocateable output, the back end routine | |
4477 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
4478 | output symbol is going to be a section symbol | |
4479 | corresponding to the output section, which will require | |
4480 | the addend to be adjusted. */ | |
4481 | ||
4482 | if (! (*relocate_section) (output_bfd, finfo->info, | |
c86158e5 | 4483 | input_bfd, o, contents, |
ede4eed4 KR |
4484 | internal_relocs, |
4485 | finfo->internal_syms, | |
4486 | finfo->sections)) | |
4487 | return false; | |
4488 | ||
4489 | if (finfo->info->relocateable) | |
4490 | { | |
4491 | Elf_Internal_Rela *irela; | |
4492 | Elf_Internal_Rela *irelaend; | |
4493 | struct elf_link_hash_entry **rel_hash; | |
4494 | Elf_Internal_Shdr *input_rel_hdr; | |
4495 | Elf_Internal_Shdr *output_rel_hdr; | |
4496 | ||
4497 | /* Adjust the reloc addresses and symbol indices. */ | |
4498 | ||
4499 | irela = internal_relocs; | |
4500 | irelaend = irela + o->reloc_count; | |
4501 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
4502 | + o->output_section->reloc_count); | |
4503 | for (; irela < irelaend; irela++, rel_hash++) | |
4504 | { | |
ae115e51 | 4505 | unsigned long r_symndx; |
ede4eed4 KR |
4506 | Elf_Internal_Sym *isym; |
4507 | asection *sec; | |
4508 | ||
4509 | irela->r_offset += o->output_offset; | |
4510 | ||
4511 | r_symndx = ELF_R_SYM (irela->r_info); | |
4512 | ||
4513 | if (r_symndx == 0) | |
4514 | continue; | |
4515 | ||
4516 | if (r_symndx >= locsymcount | |
4517 | || (elf_bad_symtab (input_bfd) | |
4518 | && finfo->sections[r_symndx] == NULL)) | |
4519 | { | |
4520 | long indx; | |
4521 | ||
4522 | /* This is a reloc against a global symbol. We | |
4523 | have not yet output all the local symbols, so | |
4524 | we do not know the symbol index of any global | |
4525 | symbol. We set the rel_hash entry for this | |
4526 | reloc to point to the global hash table entry | |
4527 | for this symbol. The symbol index is then | |
4528 | set at the end of elf_bfd_final_link. */ | |
4529 | indx = r_symndx - extsymoff; | |
4530 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; | |
4531 | ||
4532 | /* Setting the index to -2 tells | |
4533 | elf_link_output_extsym that this symbol is | |
4534 | used by a reloc. */ | |
4535 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
4536 | (*rel_hash)->indx = -2; | |
4537 | ||
4538 | continue; | |
4539 | } | |
4540 | ||
4541 | /* This is a reloc against a local symbol. */ | |
4542 | ||
4543 | *rel_hash = NULL; | |
4544 | isym = finfo->internal_syms + r_symndx; | |
4545 | sec = finfo->sections[r_symndx]; | |
4546 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4547 | { | |
4548 | /* I suppose the backend ought to fill in the | |
4549 | section of any STT_SECTION symbol against a | |
ba4a4594 ILT |
4550 | processor specific section. If we have |
4551 | discarded a section, the output_section will | |
4552 | be the absolute section. */ | |
4553 | if (sec != NULL | |
4554 | && (bfd_is_abs_section (sec) | |
4555 | || (sec->output_section != NULL | |
4556 | && bfd_is_abs_section (sec->output_section)))) | |
ede4eed4 KR |
4557 | r_symndx = 0; |
4558 | else if (sec == NULL || sec->owner == NULL) | |
4559 | { | |
4560 | bfd_set_error (bfd_error_bad_value); | |
4561 | return false; | |
4562 | } | |
4563 | else | |
4564 | { | |
4565 | r_symndx = sec->output_section->target_index; | |
4566 | BFD_ASSERT (r_symndx != 0); | |
4567 | } | |
4568 | } | |
4569 | else | |
4570 | { | |
4571 | if (finfo->indices[r_symndx] == -1) | |
4572 | { | |
4573 | unsigned long link; | |
4574 | const char *name; | |
4575 | asection *osec; | |
4576 | ||
4577 | if (finfo->info->strip == strip_all) | |
4578 | { | |
4579 | /* You can't do ld -r -s. */ | |
4580 | bfd_set_error (bfd_error_invalid_operation); | |
4581 | return false; | |
4582 | } | |
4583 | ||
4584 | /* This symbol was skipped earlier, but | |
4585 | since it is needed by a reloc, we | |
4586 | must output it now. */ | |
4587 | link = symtab_hdr->sh_link; | |
4588 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4589 | link, | |
4590 | isym->st_name); | |
4591 | if (name == NULL) | |
4592 | return false; | |
4593 | ||
4594 | osec = sec->output_section; | |
4595 | isym->st_shndx = | |
4596 | _bfd_elf_section_from_bfd_section (output_bfd, | |
4597 | osec); | |
4598 | if (isym->st_shndx == (unsigned short) -1) | |
4599 | return false; | |
4600 | ||
4601 | isym->st_value += sec->output_offset; | |
4602 | if (! finfo->info->relocateable) | |
4603 | isym->st_value += osec->vma; | |
4604 | ||
4605 | finfo->indices[r_symndx] = output_bfd->symcount; | |
4606 | ||
4607 | if (! elf_link_output_sym (finfo, name, isym, sec)) | |
4608 | return false; | |
4609 | } | |
4610 | ||
4611 | r_symndx = finfo->indices[r_symndx]; | |
4612 | } | |
4613 | ||
4614 | irela->r_info = ELF_R_INFO (r_symndx, | |
4615 | ELF_R_TYPE (irela->r_info)); | |
4616 | } | |
4617 | ||
4618 | /* Swap out the relocs. */ | |
4619 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
4620 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
4621 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
4622 | == input_rel_hdr->sh_entsize); | |
4623 | irela = internal_relocs; | |
4624 | irelaend = irela + o->reloc_count; | |
4625 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
4626 | { | |
4627 | Elf_External_Rel *erel; | |
4628 | ||
4629 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
4630 | + o->output_section->reloc_count); | |
4631 | for (; irela < irelaend; irela++, erel++) | |
4632 | { | |
4633 | Elf_Internal_Rel irel; | |
4634 | ||
4635 | irel.r_offset = irela->r_offset; | |
4636 | irel.r_info = irela->r_info; | |
4637 | BFD_ASSERT (irela->r_addend == 0); | |
4638 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
4639 | } | |
4640 | } | |
4641 | else | |
4642 | { | |
4643 | Elf_External_Rela *erela; | |
4644 | ||
4645 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
4646 | == sizeof (Elf_External_Rela)); | |
4647 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
4648 | + o->output_section->reloc_count); | |
4649 | for (; irela < irelaend; irela++, erela++) | |
4650 | elf_swap_reloca_out (output_bfd, irela, erela); | |
4651 | } | |
4652 | ||
4653 | o->output_section->reloc_count += o->reloc_count; | |
4654 | } | |
4655 | } | |
4656 | ||
4657 | /* Write out the modified section contents. */ | |
1726b8f0 ILT |
4658 | if (elf_section_data (o)->stab_info == NULL) |
4659 | { | |
4660 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
c86158e5 | 4661 | contents, o->output_offset, |
1726b8f0 ILT |
4662 | (o->_cooked_size != 0 |
4663 | ? o->_cooked_size | |
4664 | : o->_raw_size))) | |
4665 | return false; | |
4666 | } | |
4667 | else | |
4668 | { | |
3cd5cf3d ILT |
4669 | if (! (_bfd_write_section_stabs |
4670 | (output_bfd, &elf_hash_table (finfo->info)->stab_info, | |
4671 | o, &elf_section_data (o)->stab_info, contents))) | |
1726b8f0 ILT |
4672 | return false; |
4673 | } | |
ede4eed4 KR |
4674 | } |
4675 | ||
4676 | return true; | |
4677 | } | |
4678 | ||
4679 | /* Generate a reloc when linking an ELF file. This is a reloc | |
4680 | requested by the linker, and does come from any input file. This | |
4681 | is used to build constructor and destructor tables when linking | |
4682 | with -Ur. */ | |
4683 | ||
4684 | static boolean | |
4685 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
4686 | bfd *output_bfd; | |
4687 | struct bfd_link_info *info; | |
4688 | asection *output_section; | |
4689 | struct bfd_link_order *link_order; | |
4690 | { | |
4691 | reloc_howto_type *howto; | |
4692 | long indx; | |
4693 | bfd_vma offset; | |
5b3b9ff6 | 4694 | bfd_vma addend; |
ede4eed4 KR |
4695 | struct elf_link_hash_entry **rel_hash_ptr; |
4696 | Elf_Internal_Shdr *rel_hdr; | |
4697 | ||
4698 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
4699 | if (howto == NULL) | |
4700 | { | |
4701 | bfd_set_error (bfd_error_bad_value); | |
4702 | return false; | |
4703 | } | |
4704 | ||
5b3b9ff6 ILT |
4705 | addend = link_order->u.reloc.p->addend; |
4706 | ||
4707 | /* Figure out the symbol index. */ | |
4708 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
4709 | + output_section->reloc_count); | |
4710 | if (link_order->type == bfd_section_reloc_link_order) | |
4711 | { | |
4712 | indx = link_order->u.reloc.p->u.section->target_index; | |
4713 | BFD_ASSERT (indx != 0); | |
4714 | *rel_hash_ptr = NULL; | |
4715 | } | |
4716 | else | |
4717 | { | |
4718 | struct elf_link_hash_entry *h; | |
4719 | ||
4720 | /* Treat a reloc against a defined symbol as though it were | |
4721 | actually against the section. */ | |
8881b321 ILT |
4722 | h = ((struct elf_link_hash_entry *) |
4723 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
4724 | link_order->u.reloc.p->u.name, | |
4725 | false, false, true)); | |
5b3b9ff6 ILT |
4726 | if (h != NULL |
4727 | && (h->root.type == bfd_link_hash_defined | |
4728 | || h->root.type == bfd_link_hash_defweak)) | |
4729 | { | |
4730 | asection *section; | |
4731 | ||
4732 | section = h->root.u.def.section; | |
4733 | indx = section->output_section->target_index; | |
4734 | *rel_hash_ptr = NULL; | |
4735 | /* It seems that we ought to add the symbol value to the | |
4736 | addend here, but in practice it has already been added | |
4737 | because it was passed to constructor_callback. */ | |
4738 | addend += section->output_section->vma + section->output_offset; | |
4739 | } | |
4740 | else if (h != NULL) | |
4741 | { | |
4742 | /* Setting the index to -2 tells elf_link_output_extsym that | |
4743 | this symbol is used by a reloc. */ | |
4744 | h->indx = -2; | |
4745 | *rel_hash_ptr = h; | |
4746 | indx = 0; | |
4747 | } | |
4748 | else | |
4749 | { | |
4750 | if (! ((*info->callbacks->unattached_reloc) | |
4751 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
4752 | (asection *) NULL, (bfd_vma) 0))) | |
4753 | return false; | |
4754 | indx = 0; | |
4755 | } | |
4756 | } | |
4757 | ||
ede4eed4 KR |
4758 | /* If this is an inplace reloc, we must write the addend into the |
4759 | object file. */ | |
5b3b9ff6 | 4760 | if (howto->partial_inplace && addend != 0) |
ede4eed4 KR |
4761 | { |
4762 | bfd_size_type size; | |
4763 | bfd_reloc_status_type rstat; | |
4764 | bfd_byte *buf; | |
4765 | boolean ok; | |
4766 | ||
4767 | size = bfd_get_reloc_size (howto); | |
4768 | buf = (bfd_byte *) bfd_zmalloc (size); | |
4769 | if (buf == (bfd_byte *) NULL) | |
a9713b91 | 4770 | return false; |
5b3b9ff6 | 4771 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
ede4eed4 KR |
4772 | switch (rstat) |
4773 | { | |
4774 | case bfd_reloc_ok: | |
4775 | break; | |
4776 | default: | |
4777 | case bfd_reloc_outofrange: | |
4778 | abort (); | |
4779 | case bfd_reloc_overflow: | |
4780 | if (! ((*info->callbacks->reloc_overflow) | |
4781 | (info, | |
4782 | (link_order->type == bfd_section_reloc_link_order | |
4783 | ? bfd_section_name (output_bfd, | |
4784 | link_order->u.reloc.p->u.section) | |
4785 | : link_order->u.reloc.p->u.name), | |
5b3b9ff6 ILT |
4786 | howto->name, addend, (bfd *) NULL, (asection *) NULL, |
4787 | (bfd_vma) 0))) | |
ede4eed4 KR |
4788 | { |
4789 | free (buf); | |
4790 | return false; | |
4791 | } | |
4792 | break; | |
4793 | } | |
4794 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
4795 | (file_ptr) link_order->offset, size); | |
4796 | free (buf); | |
4797 | if (! ok) | |
4798 | return false; | |
4799 | } | |
4800 | ||
ede4eed4 KR |
4801 | /* The address of a reloc is relative to the section in a |
4802 | relocateable file, and is a virtual address in an executable | |
4803 | file. */ | |
4804 | offset = link_order->offset; | |
4805 | if (! info->relocateable) | |
4806 | offset += output_section->vma; | |
4807 | ||
4808 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
4809 | ||
4810 | if (rel_hdr->sh_type == SHT_REL) | |
4811 | { | |
4812 | Elf_Internal_Rel irel; | |
4813 | Elf_External_Rel *erel; | |
4814 | ||
4815 | irel.r_offset = offset; | |
4816 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
4817 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
4818 | + output_section->reloc_count); | |
4819 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
4820 | } | |
4821 | else | |
4822 | { | |
4823 | Elf_Internal_Rela irela; | |
4824 | Elf_External_Rela *erela; | |
4825 | ||
4826 | irela.r_offset = offset; | |
4827 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
5b3b9ff6 | 4828 | irela.r_addend = addend; |
ede4eed4 KR |
4829 | erela = ((Elf_External_Rela *) rel_hdr->contents |
4830 | + output_section->reloc_count); | |
4831 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
4832 | } | |
4833 | ||
4834 | ++output_section->reloc_count; | |
4835 | ||
4836 | return true; | |
4837 | } | |
4838 | ||
3b3753b8 MM |
4839 | \f |
4840 | /* Allocate a pointer to live in a linker created section. */ | |
4841 | ||
4842 | boolean | |
4843 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) | |
4844 | bfd *abfd; | |
4845 | struct bfd_link_info *info; | |
4846 | elf_linker_section_t *lsect; | |
4847 | struct elf_link_hash_entry *h; | |
4848 | const Elf_Internal_Rela *rel; | |
4849 | { | |
4850 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
4851 | elf_linker_section_pointers_t *linker_section_ptr; | |
4852 | unsigned long r_symndx = ELF_R_SYM (rel->r_info);; | |
4853 | ||
4854 | BFD_ASSERT (lsect != NULL); | |
4855 | ||
4856 | /* Is this a global symbol? */ | |
4857 | if (h != NULL) | |
4858 | { | |
4859 | /* Has this symbol already been allocated, if so, our work is done */ | |
4860 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
4861 | rel->r_addend, | |
4862 | lsect->which)) | |
4863 | return true; | |
4864 | ||
4865 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
4866 | /* Make sure this symbol is output as a dynamic symbol. */ | |
4867 | if (h->dynindx == -1) | |
4868 | { | |
4869 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4870 | return false; | |
4871 | } | |
4872 | ||
eb82bc60 MM |
4873 | if (lsect->rel_section) |
4874 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
3b3753b8 MM |
4875 | } |
4876 | ||
4877 | else /* Allocation of a pointer to a local symbol */ | |
4878 | { | |
4879 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); | |
4880 | ||
4881 | /* Allocate a table to hold the local symbols if first time */ | |
4882 | if (!ptr) | |
4883 | { | |
4884 | int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
4885 | register unsigned int i; | |
4886 | ||
4887 | ptr = (elf_linker_section_pointers_t **) | |
4888 | bfd_alloc (abfd, num_symbols * sizeof (elf_linker_section_pointers_t *)); | |
4889 | ||
4890 | if (!ptr) | |
4891 | return false; | |
4892 | ||
4893 | elf_local_ptr_offsets (abfd) = ptr; | |
4894 | for (i = 0; i < num_symbols; i++) | |
4895 | ptr[i] = (elf_linker_section_pointers_t *)0; | |
4896 | } | |
4897 | ||
4898 | /* Has this symbol already been allocated, if so, our work is done */ | |
4899 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], | |
4900 | rel->r_addend, | |
4901 | lsect->which)) | |
4902 | return true; | |
4903 | ||
4904 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
4905 | ||
4906 | if (info->shared) | |
4907 | { | |
4908 | /* If we are generating a shared object, we need to | |
05f927dd | 4909 | output a R_<xxx>_RELATIVE reloc so that the |
3b3753b8 MM |
4910 | dynamic linker can adjust this GOT entry. */ |
4911 | BFD_ASSERT (lsect->rel_section != NULL); | |
4912 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
4913 | } | |
4914 | } | |
4915 | ||
4916 | /* Allocate space for a pointer in the linker section, and allocate a new pointer record | |
4917 | from internal memory. */ | |
4918 | BFD_ASSERT (ptr_linker_section_ptr != NULL); | |
4919 | linker_section_ptr = (elf_linker_section_pointers_t *) | |
4920 | bfd_alloc (abfd, sizeof (elf_linker_section_pointers_t)); | |
4921 | ||
4922 | if (!linker_section_ptr) | |
4923 | return false; | |
4924 | ||
4925 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
4926 | linker_section_ptr->addend = rel->r_addend; | |
4927 | linker_section_ptr->which = lsect->which; | |
4928 | linker_section_ptr->written_address_p = false; | |
4929 | *ptr_linker_section_ptr = linker_section_ptr; | |
4930 | ||
cb73f5d7 | 4931 | #if 0 |
3b3753b8 MM |
4932 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) |
4933 | { | |
cb73f5d7 | 4934 | linker_section_ptr->offset = lsect->section->_raw_size - lsect->hole_size + (ARCH_SIZE / 8); |
3b3753b8 MM |
4935 | lsect->hole_offset += ARCH_SIZE / 8; |
4936 | lsect->sym_offset += ARCH_SIZE / 8; | |
4937 | if (lsect->sym_hash) /* Bump up symbol value if needed */ | |
4a4953f5 MM |
4938 | { |
4939 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; | |
4940 | #ifdef DEBUG | |
4941 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
4942 | lsect->sym_hash->root.root.string, | |
4943 | (long)ARCH_SIZE / 8, | |
4944 | (long)lsect->sym_hash->root.u.def.value); | |
4945 | #endif | |
4946 | } | |
3b3753b8 MM |
4947 | } |
4948 | else | |
cb73f5d7 | 4949 | #endif |
3b3753b8 MM |
4950 | linker_section_ptr->offset = lsect->section->_raw_size; |
4951 | ||
4952 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
4953 | ||
4954 | #ifdef DEBUG | |
4955 | fprintf (stderr, "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
4956 | lsect->name, (long)linker_section_ptr->offset, (long)lsect->section->_raw_size); | |
4957 | #endif | |
4958 | ||
4959 | return true; | |
4960 | } | |
4961 | ||
4962 | \f | |
4963 | #if ARCH_SIZE==64 | |
4964 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
4965 | #endif | |
4966 | #if ARCH_SIZE==32 | |
4967 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
4968 | #endif | |
4969 | ||
4970 | /* Fill in the address for a pointer generated in alinker section. */ | |
4971 | ||
4972 | bfd_vma | |
4973 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, relocation, rel, relative_reloc) | |
4974 | bfd *output_bfd; | |
4975 | bfd *input_bfd; | |
4976 | struct bfd_link_info *info; | |
4977 | elf_linker_section_t *lsect; | |
4978 | struct elf_link_hash_entry *h; | |
4979 | bfd_vma relocation; | |
4980 | const Elf_Internal_Rela *rel; | |
4981 | int relative_reloc; | |
4982 | { | |
4983 | elf_linker_section_pointers_t *linker_section_ptr; | |
4984 | ||
4985 | BFD_ASSERT (lsect != NULL); | |
4986 | ||
3b3753b8 MM |
4987 | if (h != NULL) /* global symbol */ |
4988 | { | |
4989 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
4990 | rel->r_addend, | |
4991 | lsect->which); | |
4992 | ||
4993 | BFD_ASSERT (linker_section_ptr != NULL); | |
4994 | ||
4995 | if (! elf_hash_table (info)->dynamic_sections_created | |
4996 | || (info->shared | |
4997 | && info->symbolic | |
4998 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
4999 | { | |
5000 | /* This is actually a static link, or it is a | |
5001 | -Bsymbolic link and the symbol is defined | |
5002 | locally. We must initialize this entry in the | |
5003 | global section. | |
5004 | ||
5005 | When doing a dynamic link, we create a .rela.<xxx> | |
5006 | relocation entry to initialize the value. This | |
5007 | is done in the finish_dynamic_symbol routine. */ | |
5008 | if (!linker_section_ptr->written_address_p) | |
5009 | { | |
5010 | linker_section_ptr->written_address_p = true; | |
5011 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
5012 | lsect->section->contents + linker_section_ptr->offset); | |
5013 | } | |
5014 | } | |
5015 | } | |
5016 | else /* local symbol */ | |
5017 | { | |
5018 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
5019 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
5020 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
5021 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
5022 | rel->r_addend, | |
5023 | lsect->which); | |
5024 | ||
5025 | BFD_ASSERT (linker_section_ptr != NULL); | |
5026 | ||
5027 | /* Write out pointer if it hasn't been rewritten out before */ | |
5028 | if (!linker_section_ptr->written_address_p) | |
5029 | { | |
5030 | linker_section_ptr->written_address_p = true; | |
5031 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
5032 | lsect->section->contents + linker_section_ptr->offset); | |
5033 | ||
5034 | if (info->shared) | |
5035 | { | |
5036 | asection *srel = lsect->rel_section; | |
5037 | Elf_Internal_Rela outrel; | |
5038 | ||
5039 | /* We need to generate a relative reloc for the dynamic linker. */ | |
5040 | if (!srel) | |
5041 | lsect->rel_section = srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
5042 | lsect->rel_name); | |
5043 | ||
5044 | BFD_ASSERT (srel != NULL); | |
5045 | ||
5046 | outrel.r_offset = (lsect->section->output_section->vma | |
5047 | + lsect->section->output_offset | |
5048 | + linker_section_ptr->offset); | |
5049 | outrel.r_info = ELF_R_INFO (0, relative_reloc); | |
5050 | outrel.r_addend = 0; | |
5051 | elf_swap_reloca_out (output_bfd, &outrel, | |
5a5bac64 | 5052 | (((Elf_External_Rela *) |
3b3753b8 MM |
5053 | lsect->section->contents) |
5054 | + lsect->section->reloc_count)); | |
5055 | ++lsect->section->reloc_count; | |
5056 | } | |
5057 | } | |
5058 | } | |
5059 | ||
5060 | relocation = (lsect->section->output_offset | |
5061 | + linker_section_ptr->offset | |
5062 | - lsect->hole_offset | |
5063 | - lsect->sym_offset); | |
5064 | ||
5065 | #ifdef DEBUG | |
5066 | fprintf (stderr, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
5067 | lsect->name, (long)relocation, (long)relocation); | |
5068 | #endif | |
5069 | ||
5070 | /* Subtract out the addend, because it will get added back in by the normal | |
5071 | processing. */ | |
5072 | return relocation - linker_section_ptr->addend; | |
5073 | } |