Commit | Line | Data |
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8afe83be | 1 | /* ELF linker support. |
f6727b90 | 2 | Copyright 1995, 1996, 1997, 1998 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 | ||
c19fbe0f ILT |
22 | /* This struct is used to pass information to routines called via |
23 | elf_link_hash_traverse which must return failure. */ | |
24 | ||
25 | struct elf_info_failed | |
26 | { | |
27 | boolean failed; | |
28 | struct bfd_link_info *info; | |
29 | }; | |
30 | ||
ede4eed4 KR |
31 | static boolean elf_link_add_object_symbols |
32 | PARAMS ((bfd *, struct bfd_link_info *)); | |
33 | static boolean elf_link_add_archive_symbols | |
34 | PARAMS ((bfd *, struct bfd_link_info *)); | |
044d7d49 ILT |
35 | static boolean elf_merge_symbol |
36 | PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, | |
37 | asection **, bfd_vma *, struct elf_link_hash_entry **, | |
38 | boolean *, boolean *, boolean *)); | |
ede4eed4 KR |
39 | static boolean elf_export_symbol |
40 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
c19fbe0f ILT |
41 | static boolean elf_fix_symbol_flags |
42 | PARAMS ((struct elf_link_hash_entry *, struct elf_info_failed *)); | |
ede4eed4 KR |
43 | static boolean elf_adjust_dynamic_symbol |
44 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
d044b40a ILT |
45 | static boolean elf_link_find_version_dependencies |
46 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
47 | static boolean elf_link_find_version_dependencies | |
48 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
49 | static boolean elf_link_assign_sym_version | |
50 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
51 | static boolean elf_link_renumber_dynsyms | |
52 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
ede4eed4 | 53 | |
ede4eed4 KR |
54 | /* Given an ELF BFD, add symbols to the global hash table as |
55 | appropriate. */ | |
56 | ||
57 | boolean | |
58 | elf_bfd_link_add_symbols (abfd, info) | |
59 | bfd *abfd; | |
60 | struct bfd_link_info *info; | |
61 | { | |
ede4eed4 KR |
62 | switch (bfd_get_format (abfd)) |
63 | { | |
64 | case bfd_object: | |
65 | return elf_link_add_object_symbols (abfd, info); | |
66 | case bfd_archive: | |
ede4eed4 KR |
67 | return elf_link_add_archive_symbols (abfd, info); |
68 | default: | |
69 | bfd_set_error (bfd_error_wrong_format); | |
70 | return false; | |
71 | } | |
72 | } | |
3b3753b8 | 73 | \f |
ede4eed4 KR |
74 | |
75 | /* Add symbols from an ELF archive file to the linker hash table. We | |
76 | don't use _bfd_generic_link_add_archive_symbols because of a | |
77 | problem which arises on UnixWare. The UnixWare libc.so is an | |
78 | archive which includes an entry libc.so.1 which defines a bunch of | |
79 | symbols. The libc.so archive also includes a number of other | |
80 | object files, which also define symbols, some of which are the same | |
81 | as those defined in libc.so.1. Correct linking requires that we | |
82 | consider each object file in turn, and include it if it defines any | |
83 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
84 | this; it looks through the list of undefined symbols, and includes | |
85 | any object file which defines them. When this algorithm is used on | |
86 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
87 | bunch of symbols. This means that some of the other objects in the | |
88 | archive are not included in the link, which is incorrect since they | |
89 | precede libc.so.1 in the archive. | |
90 | ||
91 | Fortunately, ELF archive handling is simpler than that done by | |
92 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
93 | oddities. In ELF, if we find a symbol in the archive map, and the | |
94 | symbol is currently undefined, we know that we must pull in that | |
95 | object file. | |
96 | ||
97 | Unfortunately, we do have to make multiple passes over the symbol | |
98 | table until nothing further is resolved. */ | |
99 | ||
100 | static boolean | |
101 | elf_link_add_archive_symbols (abfd, info) | |
102 | bfd *abfd; | |
103 | struct bfd_link_info *info; | |
104 | { | |
105 | symindex c; | |
106 | boolean *defined = NULL; | |
107 | boolean *included = NULL; | |
108 | carsym *symdefs; | |
109 | boolean loop; | |
110 | ||
111 | if (! bfd_has_map (abfd)) | |
112 | { | |
113 | /* An empty archive is a special case. */ | |
114 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
115 | return true; | |
116 | bfd_set_error (bfd_error_no_armap); | |
117 | return false; | |
118 | } | |
119 | ||
120 | /* Keep track of all symbols we know to be already defined, and all | |
121 | files we know to be already included. This is to speed up the | |
122 | second and subsequent passes. */ | |
123 | c = bfd_ardata (abfd)->symdef_count; | |
124 | if (c == 0) | |
125 | return true; | |
58142f10 ILT |
126 | defined = (boolean *) bfd_malloc (c * sizeof (boolean)); |
127 | included = (boolean *) bfd_malloc (c * sizeof (boolean)); | |
ede4eed4 | 128 | if (defined == (boolean *) NULL || included == (boolean *) NULL) |
58142f10 | 129 | goto error_return; |
ede4eed4 KR |
130 | memset (defined, 0, c * sizeof (boolean)); |
131 | memset (included, 0, c * sizeof (boolean)); | |
132 | ||
133 | symdefs = bfd_ardata (abfd)->symdefs; | |
134 | ||
135 | do | |
136 | { | |
137 | file_ptr last; | |
138 | symindex i; | |
139 | carsym *symdef; | |
140 | carsym *symdefend; | |
141 | ||
142 | loop = false; | |
143 | last = -1; | |
144 | ||
145 | symdef = symdefs; | |
146 | symdefend = symdef + c; | |
147 | for (i = 0; symdef < symdefend; symdef++, i++) | |
148 | { | |
149 | struct elf_link_hash_entry *h; | |
150 | bfd *element; | |
151 | struct bfd_link_hash_entry *undefs_tail; | |
152 | symindex mark; | |
153 | ||
154 | if (defined[i] || included[i]) | |
155 | continue; | |
156 | if (symdef->file_offset == last) | |
157 | { | |
158 | included[i] = true; | |
159 | continue; | |
160 | } | |
161 | ||
162 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
163 | false, false, false); | |
d044b40a ILT |
164 | |
165 | if (h == NULL) | |
166 | { | |
167 | char *p, *copy; | |
168 | ||
169 | /* If this is a default version (the name contains @@), | |
170 | look up the symbol again without the version. The | |
171 | effect is that references to the symbol without the | |
172 | version will be matched by the default symbol in the | |
173 | archive. */ | |
174 | ||
175 | p = strchr (symdef->name, ELF_VER_CHR); | |
176 | if (p == NULL || p[1] != ELF_VER_CHR) | |
177 | continue; | |
178 | ||
179 | copy = bfd_alloc (abfd, p - symdef->name + 1); | |
180 | if (copy == NULL) | |
181 | goto error_return; | |
182 | memcpy (copy, symdef->name, p - symdef->name); | |
183 | copy[p - symdef->name] = '\0'; | |
184 | ||
185 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
186 | false, false, false); | |
187 | ||
188 | bfd_release (abfd, copy); | |
189 | } | |
190 | ||
191 | if (h == NULL) | |
ede4eed4 | 192 | continue; |
d044b40a | 193 | |
ede4eed4 KR |
194 | if (h->root.type != bfd_link_hash_undefined) |
195 | { | |
68807a39 ILT |
196 | if (h->root.type != bfd_link_hash_undefweak) |
197 | defined[i] = true; | |
ede4eed4 KR |
198 | continue; |
199 | } | |
200 | ||
201 | /* We need to include this archive member. */ | |
202 | ||
203 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
204 | if (element == (bfd *) NULL) | |
205 | goto error_return; | |
206 | ||
207 | if (! bfd_check_format (element, bfd_object)) | |
208 | goto error_return; | |
209 | ||
210 | /* Doublecheck that we have not included this object | |
211 | already--it should be impossible, but there may be | |
212 | something wrong with the archive. */ | |
213 | if (element->archive_pass != 0) | |
214 | { | |
215 | bfd_set_error (bfd_error_bad_value); | |
216 | goto error_return; | |
217 | } | |
218 | element->archive_pass = 1; | |
219 | ||
220 | undefs_tail = info->hash->undefs_tail; | |
221 | ||
222 | if (! (*info->callbacks->add_archive_element) (info, element, | |
223 | symdef->name)) | |
224 | goto error_return; | |
225 | if (! elf_link_add_object_symbols (element, info)) | |
226 | goto error_return; | |
227 | ||
228 | /* If there are any new undefined symbols, we need to make | |
229 | another pass through the archive in order to see whether | |
230 | they can be defined. FIXME: This isn't perfect, because | |
231 | common symbols wind up on undefs_tail and because an | |
232 | undefined symbol which is defined later on in this pass | |
233 | does not require another pass. This isn't a bug, but it | |
234 | does make the code less efficient than it could be. */ | |
235 | if (undefs_tail != info->hash->undefs_tail) | |
236 | loop = true; | |
237 | ||
238 | /* Look backward to mark all symbols from this object file | |
239 | which we have already seen in this pass. */ | |
240 | mark = i; | |
241 | do | |
242 | { | |
243 | included[mark] = true; | |
244 | if (mark == 0) | |
245 | break; | |
246 | --mark; | |
247 | } | |
248 | while (symdefs[mark].file_offset == symdef->file_offset); | |
249 | ||
250 | /* We mark subsequent symbols from this object file as we go | |
251 | on through the loop. */ | |
252 | last = symdef->file_offset; | |
253 | } | |
254 | } | |
255 | while (loop); | |
256 | ||
257 | free (defined); | |
258 | free (included); | |
259 | ||
260 | return true; | |
261 | ||
262 | error_return: | |
263 | if (defined != (boolean *) NULL) | |
264 | free (defined); | |
265 | if (included != (boolean *) NULL) | |
266 | free (included); | |
267 | return false; | |
268 | } | |
269 | ||
044d7d49 ILT |
270 | /* This function is called when we want to define a new symbol. It |
271 | handles the various cases which arise when we find a definition in | |
272 | a dynamic object, or when there is already a definition in a | |
273 | dynamic object. The new symbol is described by NAME, SYM, PSEC, | |
274 | and PVALUE. We set SYM_HASH to the hash table entry. We set | |
275 | OVERRIDE if the old symbol is overriding a new definition. We set | |
276 | TYPE_CHANGE_OK if it is OK for the type to change. We set | |
277 | SIZE_CHANGE_OK if it is OK for the size to change. By OK to | |
278 | change, we mean that we shouldn't warn if the type or size does | |
279 | change. */ | |
280 | ||
281 | static boolean | |
282 | elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, | |
283 | override, type_change_ok, size_change_ok) | |
284 | bfd *abfd; | |
285 | struct bfd_link_info *info; | |
286 | const char *name; | |
287 | Elf_Internal_Sym *sym; | |
288 | asection **psec; | |
289 | bfd_vma *pvalue; | |
290 | struct elf_link_hash_entry **sym_hash; | |
291 | boolean *override; | |
292 | boolean *type_change_ok; | |
293 | boolean *size_change_ok; | |
294 | { | |
295 | asection *sec; | |
296 | struct elf_link_hash_entry *h; | |
297 | int bind; | |
298 | bfd *oldbfd; | |
299 | boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
300 | ||
044d7d49 | 301 | *override = false; |
044d7d49 ILT |
302 | |
303 | sec = *psec; | |
304 | bind = ELF_ST_BIND (sym->st_info); | |
305 | ||
306 | if (! bfd_is_und_section (sec)) | |
307 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, false, false); | |
308 | else | |
309 | h = ((struct elf_link_hash_entry *) | |
310 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, false, false)); | |
311 | if (h == NULL) | |
312 | return false; | |
313 | *sym_hash = h; | |
314 | ||
3359a0bc ILT |
315 | /* This code is for coping with dynamic objects, and is only useful |
316 | if we are doing an ELF link. */ | |
317 | if (info->hash->creator != abfd->xvec) | |
318 | return true; | |
319 | ||
e9982ee5 ILT |
320 | /* For merging, we only care about real symbols. */ |
321 | ||
322 | while (h->root.type == bfd_link_hash_indirect | |
323 | || h->root.type == bfd_link_hash_warning) | |
324 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
325 | ||
044d7d49 ILT |
326 | /* If we just created the symbol, mark it as being an ELF symbol. |
327 | Other than that, there is nothing to do--there is no merge issue | |
328 | with a newly defined symbol--so we just return. */ | |
329 | ||
330 | if (h->root.type == bfd_link_hash_new) | |
331 | { | |
332 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
333 | return true; | |
334 | } | |
335 | ||
044d7d49 ILT |
336 | /* OLDBFD is a BFD associated with the existing symbol. */ |
337 | ||
338 | switch (h->root.type) | |
339 | { | |
340 | default: | |
341 | oldbfd = NULL; | |
342 | break; | |
343 | ||
344 | case bfd_link_hash_undefined: | |
345 | case bfd_link_hash_undefweak: | |
346 | oldbfd = h->root.u.undef.abfd; | |
347 | break; | |
348 | ||
349 | case bfd_link_hash_defined: | |
350 | case bfd_link_hash_defweak: | |
351 | oldbfd = h->root.u.def.section->owner; | |
352 | break; | |
353 | ||
354 | case bfd_link_hash_common: | |
355 | oldbfd = h->root.u.c.p->section->owner; | |
356 | break; | |
357 | } | |
358 | ||
359 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, | |
360 | respectively, is from a dynamic object. */ | |
361 | ||
362 | if ((abfd->flags & DYNAMIC) != 0) | |
363 | newdyn = true; | |
364 | else | |
365 | newdyn = false; | |
366 | ||
367 | if (oldbfd == NULL || (oldbfd->flags & DYNAMIC) == 0) | |
368 | olddyn = false; | |
369 | else | |
370 | olddyn = true; | |
371 | ||
372 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, | |
373 | respectively, appear to be a definition rather than reference. */ | |
374 | ||
375 | if (bfd_is_und_section (sec) || bfd_is_com_section (sec)) | |
376 | newdef = false; | |
377 | else | |
378 | newdef = true; | |
379 | ||
380 | if (h->root.type == bfd_link_hash_undefined | |
381 | || h->root.type == bfd_link_hash_undefweak | |
382 | || h->root.type == bfd_link_hash_common) | |
383 | olddef = false; | |
384 | else | |
385 | olddef = true; | |
386 | ||
387 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old | |
388 | symbol, respectively, appears to be a common symbol in a dynamic | |
389 | object. If a symbol appears in an uninitialized section, and is | |
390 | not weak, and is not a function, then it may be a common symbol | |
391 | which was resolved when the dynamic object was created. We want | |
392 | to treat such symbols specially, because they raise special | |
393 | considerations when setting the symbol size: if the symbol | |
394 | appears as a common symbol in a regular object, and the size in | |
395 | the regular object is larger, we must make sure that we use the | |
396 | larger size. This problematic case can always be avoided in C, | |
397 | but it must be handled correctly when using Fortran shared | |
398 | libraries. | |
399 | ||
400 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
401 | likewise for OLDDYNCOMMON and OLDDEF. | |
402 | ||
403 | Note that this test is just a heuristic, and that it is quite | |
404 | possible to have an uninitialized symbol in a shared object which | |
405 | is really a definition, rather than a common symbol. This could | |
406 | lead to some minor confusion when the symbol really is a common | |
407 | symbol in some regular object. However, I think it will be | |
408 | harmless. */ | |
409 | ||
410 | if (newdyn | |
411 | && newdef | |
412 | && (sec->flags & SEC_ALLOC) != 0 | |
413 | && (sec->flags & SEC_LOAD) == 0 | |
414 | && sym->st_size > 0 | |
415 | && bind != STB_WEAK | |
416 | && ELF_ST_TYPE (sym->st_info) != STT_FUNC) | |
417 | newdyncommon = true; | |
418 | else | |
419 | newdyncommon = false; | |
420 | ||
421 | if (olddyn | |
422 | && olddef | |
423 | && h->root.type == bfd_link_hash_defined | |
424 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
425 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
426 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
427 | && h->size > 0 | |
428 | && h->type != STT_FUNC) | |
429 | olddyncommon = true; | |
430 | else | |
431 | olddyncommon = false; | |
432 | ||
433 | /* It's OK to change the type if either the existing symbol or the | |
434 | new symbol is weak. */ | |
435 | ||
436 | if (h->root.type == bfd_link_hash_defweak | |
437 | || h->root.type == bfd_link_hash_undefweak | |
438 | || bind == STB_WEAK) | |
439 | *type_change_ok = true; | |
440 | ||
441 | /* It's OK to change the size if either the existing symbol or the | |
442 | new symbol is weak, or if the old symbol is undefined. */ | |
443 | ||
444 | if (*type_change_ok | |
445 | || h->root.type == bfd_link_hash_undefined) | |
446 | *size_change_ok = true; | |
447 | ||
448 | /* If both the old and the new symbols look like common symbols in a | |
449 | dynamic object, set the size of the symbol to the larger of the | |
450 | two. */ | |
451 | ||
452 | if (olddyncommon | |
453 | && newdyncommon | |
454 | && sym->st_size != h->size) | |
455 | { | |
456 | /* Since we think we have two common symbols, issue a multiple | |
457 | common warning if desired. Note that we only warn if the | |
458 | size is different. If the size is the same, we simply let | |
459 | the old symbol override the new one as normally happens with | |
460 | symbols defined in dynamic objects. */ | |
461 | ||
462 | if (! ((*info->callbacks->multiple_common) | |
463 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
464 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
465 | return false; | |
466 | ||
467 | if (sym->st_size > h->size) | |
468 | h->size = sym->st_size; | |
469 | ||
470 | *size_change_ok = true; | |
471 | } | |
472 | ||
473 | /* If we are looking at a dynamic object, and we have found a | |
474 | definition, we need to see if the symbol was already defined by | |
475 | some other object. If so, we want to use the existing | |
476 | definition, and we do not want to report a multiple symbol | |
477 | definition error; we do this by clobbering *PSEC to be | |
478 | bfd_und_section_ptr. | |
479 | ||
480 | We treat a common symbol as a definition if the symbol in the | |
481 | shared library is a function, since common symbols always | |
482 | represent variables; this can cause confusion in principle, but | |
483 | any such confusion would seem to indicate an erroneous program or | |
484 | shared library. We also permit a common symbol in a regular | |
485 | object to override a weak symbol in a shared object. */ | |
486 | ||
487 | if (newdyn | |
488 | && newdef | |
489 | && (olddef | |
490 | || (h->root.type == bfd_link_hash_common | |
491 | && (bind == STB_WEAK | |
492 | || ELF_ST_TYPE (sym->st_info) == STT_FUNC)))) | |
493 | { | |
494 | *override = true; | |
495 | newdef = false; | |
496 | newdyncommon = false; | |
497 | ||
498 | *psec = sec = bfd_und_section_ptr; | |
499 | *size_change_ok = true; | |
500 | ||
501 | /* If we get here when the old symbol is a common symbol, then | |
502 | we are explicitly letting it override a weak symbol or | |
503 | function in a dynamic object, and we don't want to warn about | |
504 | a type change. If the old symbol is a defined symbol, a type | |
505 | change warning may still be appropriate. */ | |
506 | ||
507 | if (h->root.type == bfd_link_hash_common) | |
508 | *type_change_ok = true; | |
509 | } | |
510 | ||
511 | /* Handle the special case of an old common symbol merging with a | |
512 | new symbol which looks like a common symbol in a shared object. | |
513 | We change *PSEC and *PVALUE to make the new symbol look like a | |
514 | common symbol, and let _bfd_generic_link_add_one_symbol will do | |
515 | the right thing. */ | |
516 | ||
517 | if (newdyncommon | |
518 | && h->root.type == bfd_link_hash_common) | |
519 | { | |
520 | *override = true; | |
521 | newdef = false; | |
522 | newdyncommon = false; | |
523 | *pvalue = sym->st_size; | |
524 | *psec = sec = bfd_com_section_ptr; | |
525 | *size_change_ok = true; | |
526 | } | |
527 | ||
528 | /* If the old symbol is from a dynamic object, and the new symbol is | |
529 | a definition which is not from a dynamic object, then the new | |
530 | symbol overrides the old symbol. Symbols from regular files | |
531 | always take precedence over symbols from dynamic objects, even if | |
532 | they are defined after the dynamic object in the link. | |
533 | ||
534 | As above, we again permit a common symbol in a regular object to | |
535 | override a definition in a shared object if the shared object | |
536 | symbol is a function or is weak. */ | |
537 | ||
538 | if (! newdyn | |
539 | && (newdef | |
540 | || (bfd_is_com_section (sec) | |
541 | && (h->root.type == bfd_link_hash_defweak | |
542 | || h->type == STT_FUNC))) | |
543 | && olddyn | |
544 | && olddef | |
545 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0) | |
546 | { | |
547 | /* Change the hash table entry to undefined, and let | |
548 | _bfd_generic_link_add_one_symbol do the right thing with the | |
549 | new definition. */ | |
550 | ||
551 | h->root.type = bfd_link_hash_undefined; | |
552 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
553 | *size_change_ok = true; | |
554 | ||
555 | olddef = false; | |
556 | olddyncommon = false; | |
557 | ||
558 | /* We again permit a type change when a common symbol may be | |
559 | overriding a function. */ | |
560 | ||
561 | if (bfd_is_com_section (sec)) | |
562 | *type_change_ok = true; | |
563 | ||
564 | /* This union may have been set to be non-NULL when this symbol | |
565 | was seen in a dynamic object. We must force the union to be | |
566 | NULL, so that it is correct for a regular symbol. */ | |
567 | ||
568 | h->verinfo.vertree = NULL; | |
541a4b54 ILT |
569 | |
570 | /* In this special case, if H is the target of an indirection, | |
571 | we want the caller to frob with H rather than with the | |
572 | indirect symbol. That will permit the caller to redefine the | |
573 | target of the indirection, rather than the indirect symbol | |
862eaedc ILT |
574 | itself. FIXME: This will break the -y option if we store a |
575 | symbol with a different name. */ | |
541a4b54 | 576 | *sym_hash = h; |
044d7d49 ILT |
577 | } |
578 | ||
579 | /* Handle the special case of a new common symbol merging with an | |
580 | old symbol that looks like it might be a common symbol defined in | |
581 | a shared object. Note that we have already handled the case in | |
582 | which a new common symbol should simply override the definition | |
583 | in the shared library. */ | |
584 | ||
585 | if (! newdyn | |
586 | && bfd_is_com_section (sec) | |
587 | && olddyncommon) | |
588 | { | |
589 | /* It would be best if we could set the hash table entry to a | |
590 | common symbol, but we don't know what to use for the section | |
591 | or the alignment. */ | |
592 | if (! ((*info->callbacks->multiple_common) | |
593 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
594 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
595 | return false; | |
596 | ||
597 | /* If the predumed common symbol in the dynamic object is | |
598 | larger, pretend that the new symbol has its size. */ | |
599 | ||
600 | if (h->size > *pvalue) | |
601 | *pvalue = h->size; | |
602 | ||
603 | /* FIXME: We no longer know the alignment required by the symbol | |
604 | in the dynamic object, so we just wind up using the one from | |
605 | the regular object. */ | |
606 | ||
607 | olddef = false; | |
608 | olddyncommon = false; | |
609 | ||
610 | h->root.type = bfd_link_hash_undefined; | |
611 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
612 | ||
613 | *size_change_ok = true; | |
614 | *type_change_ok = true; | |
615 | ||
616 | h->verinfo.vertree = NULL; | |
617 | } | |
618 | ||
619 | return true; | |
620 | } | |
621 | ||
ede4eed4 KR |
622 | /* Add symbols from an ELF object file to the linker hash table. */ |
623 | ||
624 | static boolean | |
625 | elf_link_add_object_symbols (abfd, info) | |
626 | bfd *abfd; | |
627 | struct bfd_link_info *info; | |
628 | { | |
629 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
630 | const Elf_Internal_Sym *, | |
631 | const char **, flagword *, | |
632 | asection **, bfd_vma *)); | |
633 | boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *, | |
634 | asection *, const Elf_Internal_Rela *)); | |
635 | boolean collect; | |
636 | Elf_Internal_Shdr *hdr; | |
637 | size_t symcount; | |
638 | size_t extsymcount; | |
639 | size_t extsymoff; | |
640 | Elf_External_Sym *buf = NULL; | |
641 | struct elf_link_hash_entry **sym_hash; | |
642 | boolean dynamic; | |
d044b40a ILT |
643 | bfd_byte *dynver = NULL; |
644 | Elf_External_Versym *extversym = NULL; | |
645 | Elf_External_Versym *ever; | |
ede4eed4 KR |
646 | Elf_External_Dyn *dynbuf = NULL; |
647 | struct elf_link_hash_entry *weaks; | |
648 | Elf_External_Sym *esym; | |
649 | Elf_External_Sym *esymend; | |
650 | ||
651 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
652 | collect = get_elf_backend_data (abfd)->collect; | |
653 | ||
d044b40a ILT |
654 | if ((abfd->flags & DYNAMIC) == 0) |
655 | dynamic = false; | |
656 | else | |
657 | { | |
658 | dynamic = true; | |
659 | ||
660 | /* You can't use -r against a dynamic object. Also, there's no | |
661 | hope of using a dynamic object which does not exactly match | |
662 | the format of the output file. */ | |
663 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
664 | { | |
665 | bfd_set_error (bfd_error_invalid_operation); | |
666 | goto error_return; | |
667 | } | |
668 | } | |
669 | ||
0cb70568 ILT |
670 | /* As a GNU extension, any input sections which are named |
671 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
672 | symbol. This differs from .gnu.warning sections, which generate | |
673 | warnings when they are included in an output file. */ | |
674 | if (! info->shared) | |
675 | { | |
676 | asection *s; | |
677 | ||
678 | for (s = abfd->sections; s != NULL; s = s->next) | |
679 | { | |
680 | const char *name; | |
681 | ||
682 | name = bfd_get_section_name (abfd, s); | |
683 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
684 | { | |
685 | char *msg; | |
686 | bfd_size_type sz; | |
687 | ||
54626f1a ILT |
688 | name += sizeof ".gnu.warning." - 1; |
689 | ||
690 | /* If this is a shared object, then look up the symbol | |
691 | in the hash table. If it is there, and it is already | |
692 | been defined, then we will not be using the entry | |
693 | from this shared object, so we don't need to warn. | |
694 | FIXME: If we see the definition in a regular object | |
695 | later on, we will warn, but we shouldn't. The only | |
696 | fix is to keep track of what warnings we are supposed | |
697 | to emit, and then handle them all at the end of the | |
698 | link. */ | |
d044b40a | 699 | if (dynamic && abfd->xvec == info->hash->creator) |
54626f1a ILT |
700 | { |
701 | struct elf_link_hash_entry *h; | |
702 | ||
703 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
704 | false, false, true); | |
705 | ||
706 | /* FIXME: What about bfd_link_hash_common? */ | |
707 | if (h != NULL | |
708 | && (h->root.type == bfd_link_hash_defined | |
709 | || h->root.type == bfd_link_hash_defweak)) | |
710 | { | |
711 | /* We don't want to issue this warning. Clobber | |
712 | the section size so that the warning does not | |
713 | get copied into the output file. */ | |
714 | s->_raw_size = 0; | |
715 | continue; | |
716 | } | |
717 | } | |
718 | ||
0cb70568 ILT |
719 | sz = bfd_section_size (abfd, s); |
720 | msg = (char *) bfd_alloc (abfd, sz); | |
721 | if (msg == NULL) | |
a9713b91 | 722 | goto error_return; |
0cb70568 ILT |
723 | |
724 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
725 | goto error_return; | |
726 | ||
727 | if (! (_bfd_generic_link_add_one_symbol | |
54626f1a ILT |
728 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, |
729 | false, collect, (struct bfd_link_hash_entry **) NULL))) | |
0cb70568 ILT |
730 | goto error_return; |
731 | ||
732 | if (! info->relocateable) | |
733 | { | |
734 | /* Clobber the section size so that the warning does | |
735 | not get copied into the output file. */ | |
736 | s->_raw_size = 0; | |
737 | } | |
738 | } | |
739 | } | |
740 | } | |
741 | ||
d044b40a ILT |
742 | /* If this is a dynamic object, we always link against the .dynsym |
743 | symbol table, not the .symtab symbol table. The dynamic linker | |
744 | will only see the .dynsym symbol table, so there is no reason to | |
745 | look at .symtab for a dynamic object. */ | |
746 | ||
747 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
748 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
749 | else | |
750 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
751 | ||
752 | if (dynamic) | |
ede4eed4 | 753 | { |
d044b40a ILT |
754 | /* Read in any version definitions. */ |
755 | ||
601acd61 UD |
756 | if (! _bfd_elf_slurp_version_tables (abfd)) |
757 | goto error_return; | |
d044b40a ILT |
758 | |
759 | /* Read in the symbol versions, but don't bother to convert them | |
760 | to internal format. */ | |
761 | if (elf_dynversym (abfd) != 0) | |
762 | { | |
763 | Elf_Internal_Shdr *versymhdr; | |
764 | ||
765 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
766 | extversym = (Elf_External_Versym *) bfd_malloc (hdr->sh_size); | |
767 | if (extversym == NULL) | |
768 | goto error_return; | |
769 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
770 | || (bfd_read ((PTR) extversym, 1, versymhdr->sh_size, abfd) | |
771 | != versymhdr->sh_size)) | |
772 | goto error_return; | |
773 | } | |
ede4eed4 KR |
774 | } |
775 | ||
ede4eed4 KR |
776 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
777 | ||
778 | /* The sh_info field of the symtab header tells us where the | |
779 | external symbols start. We don't care about the local symbols at | |
780 | this point. */ | |
781 | if (elf_bad_symtab (abfd)) | |
782 | { | |
783 | extsymcount = symcount; | |
784 | extsymoff = 0; | |
785 | } | |
786 | else | |
787 | { | |
788 | extsymcount = symcount - hdr->sh_info; | |
789 | extsymoff = hdr->sh_info; | |
790 | } | |
791 | ||
58142f10 ILT |
792 | buf = ((Elf_External_Sym *) |
793 | bfd_malloc (extsymcount * sizeof (Elf_External_Sym))); | |
ede4eed4 | 794 | if (buf == NULL && extsymcount != 0) |
58142f10 | 795 | goto error_return; |
ede4eed4 KR |
796 | |
797 | /* We store a pointer to the hash table entry for each external | |
798 | symbol. */ | |
799 | sym_hash = ((struct elf_link_hash_entry **) | |
800 | bfd_alloc (abfd, | |
801 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
802 | if (sym_hash == NULL) | |
a9713b91 | 803 | goto error_return; |
ede4eed4 KR |
804 | elf_sym_hashes (abfd) = sym_hash; |
805 | ||
d044b40a | 806 | if (! dynamic) |
ede4eed4 | 807 | { |
ede4eed4 KR |
808 | /* If we are creating a shared library, create all the dynamic |
809 | sections immediately. We need to attach them to something, | |
810 | so we attach them to this BFD, provided it is the right | |
811 | format. FIXME: If there are no input BFD's of the same | |
812 | format as the output, we can't make a shared library. */ | |
813 | if (info->shared | |
814 | && ! elf_hash_table (info)->dynamic_sections_created | |
815 | && abfd->xvec == info->hash->creator) | |
816 | { | |
817 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
818 | goto error_return; | |
819 | } | |
820 | } | |
821 | else | |
822 | { | |
823 | asection *s; | |
824 | boolean add_needed; | |
825 | const char *name; | |
826 | bfd_size_type oldsize; | |
827 | bfd_size_type strindex; | |
828 | ||
ede4eed4 KR |
829 | /* Find the name to use in a DT_NEEDED entry that refers to this |
830 | object. If the object has a DT_SONAME entry, we use it. | |
831 | Otherwise, if the generic linker stuck something in | |
60a49e7f ILT |
832 | elf_dt_name, we use that. Otherwise, we just use the file |
833 | name. If the generic linker put a null string into | |
834 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
835 | there is a DT_SONAME entry. */ | |
ede4eed4 KR |
836 | add_needed = true; |
837 | name = bfd_get_filename (abfd); | |
60a49e7f | 838 | if (elf_dt_name (abfd) != NULL) |
ede4eed4 | 839 | { |
60a49e7f | 840 | name = elf_dt_name (abfd); |
ede4eed4 KR |
841 | if (*name == '\0') |
842 | add_needed = false; | |
843 | } | |
844 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
845 | if (s != NULL) | |
846 | { | |
847 | Elf_External_Dyn *extdyn; | |
848 | Elf_External_Dyn *extdynend; | |
849 | int elfsec; | |
850 | unsigned long link; | |
851 | ||
58142f10 | 852 | dynbuf = (Elf_External_Dyn *) bfd_malloc ((size_t) s->_raw_size); |
ede4eed4 | 853 | if (dynbuf == NULL) |
58142f10 | 854 | goto error_return; |
ede4eed4 KR |
855 | |
856 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
857 | (file_ptr) 0, s->_raw_size)) | |
858 | goto error_return; | |
859 | ||
860 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
861 | if (elfsec == -1) | |
862 | goto error_return; | |
863 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
864 | ||
865 | extdyn = dynbuf; | |
866 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
867 | for (; extdyn < extdynend; extdyn++) | |
868 | { | |
869 | Elf_Internal_Dyn dyn; | |
870 | ||
871 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
60a49e7f | 872 | if (dyn.d_tag == DT_SONAME) |
ede4eed4 KR |
873 | { |
874 | name = bfd_elf_string_from_elf_section (abfd, link, | |
875 | dyn.d_un.d_val); | |
876 | if (name == NULL) | |
877 | goto error_return; | |
878 | } | |
879 | if (dyn.d_tag == DT_NEEDED) | |
880 | { | |
54406786 | 881 | struct bfd_link_needed_list *n, **pn; |
ede4eed4 KR |
882 | char *fnm, *anm; |
883 | ||
54406786 ILT |
884 | n = ((struct bfd_link_needed_list *) |
885 | bfd_alloc (abfd, sizeof (struct bfd_link_needed_list))); | |
ede4eed4 KR |
886 | fnm = bfd_elf_string_from_elf_section (abfd, link, |
887 | dyn.d_un.d_val); | |
888 | if (n == NULL || fnm == NULL) | |
889 | goto error_return; | |
890 | anm = bfd_alloc (abfd, strlen (fnm) + 1); | |
891 | if (anm == NULL) | |
892 | goto error_return; | |
893 | strcpy (anm, fnm); | |
894 | n->name = anm; | |
895 | n->by = abfd; | |
896 | n->next = NULL; | |
897 | for (pn = &elf_hash_table (info)->needed; | |
898 | *pn != NULL; | |
899 | pn = &(*pn)->next) | |
900 | ; | |
901 | *pn = n; | |
902 | } | |
903 | } | |
904 | ||
905 | free (dynbuf); | |
906 | dynbuf = NULL; | |
907 | } | |
908 | ||
909 | /* We do not want to include any of the sections in a dynamic | |
910 | object in the output file. We hack by simply clobbering the | |
911 | list of sections in the BFD. This could be handled more | |
912 | cleanly by, say, a new section flag; the existing | |
913 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
914 | still implies that the section takes up space in the output | |
915 | file. */ | |
916 | abfd->sections = NULL; | |
010d9f2d | 917 | abfd->section_count = 0; |
ede4eed4 KR |
918 | |
919 | /* If this is the first dynamic object found in the link, create | |
920 | the special sections required for dynamic linking. */ | |
921 | if (! elf_hash_table (info)->dynamic_sections_created) | |
922 | { | |
923 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
924 | goto error_return; | |
925 | } | |
926 | ||
927 | if (add_needed) | |
928 | { | |
929 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
930 | oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
931 | strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name, | |
932 | true, false); | |
933 | if (strindex == (bfd_size_type) -1) | |
934 | goto error_return; | |
935 | ||
936 | if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr)) | |
937 | { | |
938 | asection *sdyn; | |
939 | Elf_External_Dyn *dyncon, *dynconend; | |
940 | ||
941 | /* The hash table size did not change, which means that | |
942 | the dynamic object name was already entered. If we | |
943 | have already included this dynamic object in the | |
944 | link, just ignore it. There is no reason to include | |
945 | a particular dynamic object more than once. */ | |
946 | sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
947 | ".dynamic"); | |
948 | BFD_ASSERT (sdyn != NULL); | |
949 | ||
950 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
951 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
952 | sdyn->_raw_size); | |
953 | for (; dyncon < dynconend; dyncon++) | |
954 | { | |
955 | Elf_Internal_Dyn dyn; | |
956 | ||
957 | elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon, | |
958 | &dyn); | |
959 | if (dyn.d_tag == DT_NEEDED | |
960 | && dyn.d_un.d_val == strindex) | |
961 | { | |
962 | if (buf != NULL) | |
963 | free (buf); | |
d044b40a ILT |
964 | if (extversym != NULL) |
965 | free (extversym); | |
ede4eed4 KR |
966 | return true; |
967 | } | |
968 | } | |
969 | } | |
970 | ||
971 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
972 | goto error_return; | |
973 | } | |
60a49e7f ILT |
974 | |
975 | /* Save the SONAME, if there is one, because sometimes the | |
976 | linker emulation code will need to know it. */ | |
977 | if (*name == '\0') | |
978 | name = bfd_get_filename (abfd); | |
979 | elf_dt_name (abfd) = name; | |
ede4eed4 KR |
980 | } |
981 | ||
982 | if (bfd_seek (abfd, | |
983 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), | |
984 | SEEK_SET) != 0 | |
985 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
986 | != extsymcount * sizeof (Elf_External_Sym))) | |
987 | goto error_return; | |
988 | ||
989 | weaks = NULL; | |
990 | ||
e549b1d2 | 991 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
ede4eed4 | 992 | esymend = buf + extsymcount; |
d044b40a ILT |
993 | for (esym = buf; |
994 | esym < esymend; | |
995 | esym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
ede4eed4 KR |
996 | { |
997 | Elf_Internal_Sym sym; | |
998 | int bind; | |
999 | bfd_vma value; | |
1000 | asection *sec; | |
1001 | flagword flags; | |
1002 | const char *name; | |
0cb70568 | 1003 | struct elf_link_hash_entry *h; |
ede4eed4 | 1004 | boolean definition; |
ee9f09cd | 1005 | boolean size_change_ok, type_change_ok; |
452a5efb | 1006 | boolean new_weakdef; |
fd6c00ba | 1007 | unsigned int old_alignment; |
ede4eed4 KR |
1008 | |
1009 | elf_swap_symbol_in (abfd, esym, &sym); | |
1010 | ||
1011 | flags = BSF_NO_FLAGS; | |
1012 | sec = NULL; | |
1013 | value = sym.st_value; | |
1014 | *sym_hash = NULL; | |
1015 | ||
1016 | bind = ELF_ST_BIND (sym.st_info); | |
1017 | if (bind == STB_LOCAL) | |
1018 | { | |
1019 | /* This should be impossible, since ELF requires that all | |
1020 | global symbols follow all local symbols, and that sh_info | |
1021 | point to the first global symbol. Unfortunatealy, Irix 5 | |
1022 | screws this up. */ | |
1023 | continue; | |
1024 | } | |
1025 | else if (bind == STB_GLOBAL) | |
1026 | { | |
1027 | if (sym.st_shndx != SHN_UNDEF | |
1028 | && sym.st_shndx != SHN_COMMON) | |
1029 | flags = BSF_GLOBAL; | |
1030 | else | |
1031 | flags = 0; | |
1032 | } | |
1033 | else if (bind == STB_WEAK) | |
1034 | flags = BSF_WEAK; | |
1035 | else | |
1036 | { | |
1037 | /* Leave it up to the processor backend. */ | |
1038 | } | |
1039 | ||
1040 | if (sym.st_shndx == SHN_UNDEF) | |
1041 | sec = bfd_und_section_ptr; | |
1042 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) | |
1043 | { | |
1044 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
f02004e9 | 1045 | if (sec == NULL) |
ede4eed4 | 1046 | sec = bfd_abs_section_ptr; |
f02004e9 ILT |
1047 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
1048 | value -= sec->vma; | |
ede4eed4 KR |
1049 | } |
1050 | else if (sym.st_shndx == SHN_ABS) | |
1051 | sec = bfd_abs_section_ptr; | |
1052 | else if (sym.st_shndx == SHN_COMMON) | |
1053 | { | |
1054 | sec = bfd_com_section_ptr; | |
1055 | /* What ELF calls the size we call the value. What ELF | |
1056 | calls the value we call the alignment. */ | |
1057 | value = sym.st_size; | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | /* Leave it up to the processor backend. */ | |
1062 | } | |
1063 | ||
1064 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
1065 | if (name == (const char *) NULL) | |
1066 | goto error_return; | |
1067 | ||
1068 | if (add_symbol_hook) | |
1069 | { | |
1070 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
1071 | &value)) | |
1072 | goto error_return; | |
1073 | ||
1074 | /* The hook function sets the name to NULL if this symbol | |
1075 | should be skipped for some reason. */ | |
1076 | if (name == (const char *) NULL) | |
1077 | continue; | |
1078 | } | |
1079 | ||
1080 | /* Sanity check that all possibilities were handled. */ | |
1081 | if (sec == (asection *) NULL) | |
1082 | { | |
1083 | bfd_set_error (bfd_error_bad_value); | |
1084 | goto error_return; | |
1085 | } | |
1086 | ||
1087 | if (bfd_is_und_section (sec) | |
1088 | || bfd_is_com_section (sec)) | |
1089 | definition = false; | |
1090 | else | |
1091 | definition = true; | |
1092 | ||
ee9f09cd | 1093 | size_change_ok = false; |
5b3b9ff6 | 1094 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
fd6c00ba | 1095 | old_alignment = 0; |
ede4eed4 KR |
1096 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
1097 | { | |
d044b40a | 1098 | Elf_Internal_Versym iver; |
f6727b90 | 1099 | unsigned int vernum = 0; |
d044b40a ILT |
1100 | boolean override; |
1101 | ||
1102 | if (ever != NULL) | |
1103 | { | |
1104 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
1105 | vernum = iver.vs_vers & VERSYM_VERSION; | |
1106 | ||
1107 | /* If this is a hidden symbol, or if it is not version | |
1108 | 1, we append the version name to the symbol name. | |
1109 | However, we do not modify a non-hidden absolute | |
1110 | symbol, because it might be the version symbol | |
1111 | itself. FIXME: What if it isn't? */ | |
1112 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 | |
1113 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
1114 | { | |
1115 | const char *verstr; | |
1116 | int namelen, newlen; | |
1117 | char *newname, *p; | |
1118 | ||
601acd61 | 1119 | if (sym.st_shndx != SHN_UNDEF) |
e549b1d2 | 1120 | { |
601acd61 UD |
1121 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) |
1122 | { | |
1123 | (*_bfd_error_handler) | |
53d3ce37 | 1124 | (_("%s: %s: invalid version %u (max %d)"), |
601acd61 UD |
1125 | abfd->filename, name, vernum, |
1126 | elf_tdata (abfd)->dynverdef_hdr.sh_info); | |
1127 | bfd_set_error (bfd_error_bad_value); | |
1128 | goto error_return; | |
1129 | } | |
1130 | else if (vernum > 1) | |
1131 | verstr = | |
1132 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1133 | else | |
1134 | verstr = ""; | |
e549b1d2 | 1135 | } |
d044b40a | 1136 | else |
601acd61 UD |
1137 | { |
1138 | /* We cannot simply test for the number of | |
1139 | entries in the VERNEED section since the | |
1140 | numbers for the needed versions do not start | |
1141 | at 0. */ | |
1142 | Elf_Internal_Verneed *t; | |
1143 | ||
1144 | verstr = NULL; | |
1145 | for (t = elf_tdata (abfd)->verref; | |
1146 | t != NULL; | |
1147 | t = t->vn_nextref) | |
1148 | { | |
1149 | Elf_Internal_Vernaux *a; | |
1150 | ||
1151 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1152 | { | |
1153 | if (a->vna_other == vernum) | |
1154 | { | |
1155 | verstr = a->vna_nodename; | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | if (a != NULL) | |
1160 | break; | |
1161 | } | |
1162 | if (verstr == NULL) | |
1163 | { | |
1164 | (*_bfd_error_handler) | |
53d3ce37 | 1165 | (_("%s: %s: invalid needed version %d"), |
601acd61 UD |
1166 | abfd->filename, name, vernum); |
1167 | bfd_set_error (bfd_error_bad_value); | |
1168 | goto error_return; | |
1169 | } | |
1170 | } | |
d044b40a ILT |
1171 | |
1172 | namelen = strlen (name); | |
1173 | newlen = namelen + strlen (verstr) + 2; | |
1174 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
1175 | ++newlen; | |
1176 | ||
1177 | newname = (char *) bfd_alloc (abfd, newlen); | |
1178 | if (newname == NULL) | |
1179 | goto error_return; | |
1180 | strcpy (newname, name); | |
1181 | p = newname + namelen; | |
1182 | *p++ = ELF_VER_CHR; | |
1183 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
1184 | *p++ = ELF_VER_CHR; | |
1185 | strcpy (p, verstr); | |
1186 | ||
1187 | name = newname; | |
1188 | } | |
1189 | } | |
1190 | ||
044d7d49 ILT |
1191 | if (! elf_merge_symbol (abfd, info, name, &sym, &sec, &value, |
1192 | sym_hash, &override, &type_change_ok, | |
1193 | &size_change_ok)) | |
ede4eed4 | 1194 | goto error_return; |
ede4eed4 | 1195 | |
044d7d49 ILT |
1196 | if (override) |
1197 | definition = false; | |
869b7d80 | 1198 | |
044d7d49 | 1199 | h = *sym_hash; |
0cb70568 ILT |
1200 | while (h->root.type == bfd_link_hash_indirect |
1201 | || h->root.type == bfd_link_hash_warning) | |
c4badc83 | 1202 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
0cb70568 | 1203 | |
044d7d49 ILT |
1204 | /* Remember the old alignment if this is a common symbol, so |
1205 | that we don't reduce the alignment later on. We can't | |
1206 | check later, because _bfd_generic_link_add_one_symbol | |
1207 | will set a default for the alignment which we want to | |
1208 | override. */ | |
fd6c00ba ILT |
1209 | if (h->root.type == bfd_link_hash_common) |
1210 | old_alignment = h->root.u.c.p->alignment_power; | |
1211 | ||
13eb6306 | 1212 | if (elf_tdata (abfd)->verdef != NULL |
d044b40a ILT |
1213 | && ! override |
1214 | && vernum > 1 | |
13eb6306 | 1215 | && definition) |
d044b40a | 1216 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; |
ede4eed4 KR |
1217 | } |
1218 | ||
1219 | if (! (_bfd_generic_link_add_one_symbol | |
1220 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
1221 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
1222 | goto error_return; | |
1223 | ||
0cb70568 ILT |
1224 | h = *sym_hash; |
1225 | while (h->root.type == bfd_link_hash_indirect | |
1226 | || h->root.type == bfd_link_hash_warning) | |
1227 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1228 | *sym_hash = h; | |
1229 | ||
452a5efb | 1230 | new_weakdef = false; |
ede4eed4 KR |
1231 | if (dynamic |
1232 | && definition | |
1233 | && (flags & BSF_WEAK) != 0 | |
1234 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
1235 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
0cb70568 | 1236 | && h->weakdef == NULL) |
ede4eed4 KR |
1237 | { |
1238 | /* Keep a list of all weak defined non function symbols from | |
1239 | a dynamic object, using the weakdef field. Later in this | |
1240 | function we will set the weakdef field to the correct | |
1241 | value. We only put non-function symbols from dynamic | |
1242 | objects on this list, because that happens to be the only | |
1243 | time we need to know the normal symbol corresponding to a | |
1244 | weak symbol, and the information is time consuming to | |
1245 | figure out. If the weakdef field is not already NULL, | |
1246 | then this symbol was already defined by some previous | |
1247 | dynamic object, and we will be using that previous | |
1248 | definition anyhow. */ | |
1249 | ||
0cb70568 ILT |
1250 | h->weakdef = weaks; |
1251 | weaks = h; | |
452a5efb | 1252 | new_weakdef = true; |
ede4eed4 KR |
1253 | } |
1254 | ||
fd6c00ba | 1255 | /* Set the alignment of a common symbol. */ |
ede4eed4 | 1256 | if (sym.st_shndx == SHN_COMMON |
0cb70568 | 1257 | && h->root.type == bfd_link_hash_common) |
fd6c00ba ILT |
1258 | { |
1259 | unsigned int align; | |
1260 | ||
1261 | align = bfd_log2 (sym.st_value); | |
1262 | if (align > old_alignment) | |
1263 | h->root.u.c.p->alignment_power = align; | |
1264 | } | |
ede4eed4 KR |
1265 | |
1266 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1267 | { | |
1268 | int old_flags; | |
1269 | boolean dynsym; | |
1270 | int new_flag; | |
1271 | ||
1272 | /* Remember the symbol size and type. */ | |
3d7c42c9 ILT |
1273 | if (sym.st_size != 0 |
1274 | && (definition || h->size == 0)) | |
ede4eed4 | 1275 | { |
ee9f09cd | 1276 | if (h->size != 0 && h->size != sym.st_size && ! size_change_ok) |
3d7c42c9 | 1277 | (*_bfd_error_handler) |
53d3ce37 | 1278 | (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"), |
ba254dc5 ILT |
1279 | name, (unsigned long) h->size, (unsigned long) sym.st_size, |
1280 | bfd_get_filename (abfd)); | |
1281 | ||
1282 | h->size = sym.st_size; | |
ede4eed4 | 1283 | } |
031dfce0 ILT |
1284 | |
1285 | /* If this is a common symbol, then we always want H->SIZE | |
1286 | to be the size of the common symbol. The code just above | |
1287 | won't fix the size if a common symbol becomes larger. We | |
1288 | don't warn about a size change here, because that is | |
1289 | covered by --warn-common. */ | |
1290 | if (h->root.type == bfd_link_hash_common) | |
1291 | h->size = h->root.u.c.size; | |
1292 | ||
3d7c42c9 ILT |
1293 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE |
1294 | && (definition || h->type == STT_NOTYPE)) | |
ede4eed4 | 1295 | { |
3d7c42c9 | 1296 | if (h->type != STT_NOTYPE |
8235c112 | 1297 | && h->type != ELF_ST_TYPE (sym.st_info) |
ee9f09cd | 1298 | && ! type_change_ok) |
3d7c42c9 | 1299 | (*_bfd_error_handler) |
53d3ce37 | 1300 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), |
3d7c42c9 ILT |
1301 | name, h->type, ELF_ST_TYPE (sym.st_info), |
1302 | bfd_get_filename (abfd)); | |
1303 | ||
ede4eed4 KR |
1304 | h->type = ELF_ST_TYPE (sym.st_info); |
1305 | } | |
1306 | ||
6c02f1a0 ILT |
1307 | if (sym.st_other != 0 |
1308 | && (definition || h->other == 0)) | |
1309 | h->other = sym.st_other; | |
1310 | ||
ede4eed4 KR |
1311 | /* Set a flag in the hash table entry indicating the type of |
1312 | reference or definition we just found. Keep a count of | |
1313 | the number of dynamic symbols we find. A dynamic symbol | |
1314 | is one which is referenced or defined by both a regular | |
440f3914 | 1315 | object and a shared object. */ |
ede4eed4 KR |
1316 | old_flags = h->elf_link_hash_flags; |
1317 | dynsym = false; | |
1318 | if (! dynamic) | |
1319 | { | |
1320 | if (! definition) | |
1321 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1322 | else | |
1323 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1324 | if (info->shared | |
1325 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1326 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
1327 | dynsym = true; | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | if (! definition) | |
1332 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1333 | else | |
1334 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
0db6249c | 1335 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR |
1c4794f5 ILT |
1336 | | ELF_LINK_HASH_REF_REGULAR)) != 0 |
1337 | || (h->weakdef != NULL | |
440f3914 ILT |
1338 | && ! new_weakdef |
1339 | && h->weakdef->dynindx != -1)) | |
ede4eed4 KR |
1340 | dynsym = true; |
1341 | } | |
1342 | ||
1343 | h->elf_link_hash_flags |= new_flag; | |
d044b40a ILT |
1344 | |
1345 | /* If this symbol has a version, and it is the default | |
1346 | version, we create an indirect symbol from the default | |
1347 | name to the fully decorated name. This will cause | |
1348 | external references which do not specify a version to be | |
1349 | bound to this version of the symbol. */ | |
1350 | if (definition) | |
1351 | { | |
1352 | char *p; | |
1353 | ||
1354 | p = strchr (name, ELF_VER_CHR); | |
1355 | if (p != NULL && p[1] == ELF_VER_CHR) | |
1356 | { | |
1357 | char *shortname; | |
044d7d49 ILT |
1358 | struct elf_link_hash_entry *hi; |
1359 | boolean override; | |
d044b40a ILT |
1360 | |
1361 | shortname = bfd_hash_allocate (&info->hash->table, | |
1362 | p - name + 1); | |
1363 | if (shortname == NULL) | |
1364 | goto error_return; | |
1365 | strncpy (shortname, name, p - name); | |
1366 | shortname[p - name] = '\0'; | |
1367 | ||
044d7d49 ILT |
1368 | /* We are going to create a new symbol. Merge it |
1369 | with any existing symbol with this name. For the | |
1370 | purposes of the merge, act as though we were | |
1371 | defining the symbol we just defined, although we | |
1372 | actually going to define an indirect symbol. */ | |
0e039bdc ILT |
1373 | type_change_ok = false; |
1374 | size_change_ok = false; | |
044d7d49 ILT |
1375 | if (! elf_merge_symbol (abfd, info, shortname, &sym, &sec, |
1376 | &value, &hi, &override, | |
1377 | &type_change_ok, &size_change_ok)) | |
1378 | goto error_return; | |
d044b40a | 1379 | |
044d7d49 | 1380 | if (! override) |
d6bfcdb5 | 1381 | { |
52c92c7f ILT |
1382 | if (! (_bfd_generic_link_add_one_symbol |
1383 | (info, abfd, shortname, BSF_INDIRECT, | |
1384 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1385 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1386 | goto error_return; | |
541a4b54 ILT |
1387 | } |
1388 | else | |
1389 | { | |
1390 | /* In this case the symbol named SHORTNAME is | |
1391 | overriding the indirect symbol we want to | |
1392 | add. We were planning on making SHORTNAME an | |
1393 | indirect symbol referring to NAME. SHORTNAME | |
1394 | is the name without a version. NAME is the | |
1395 | fully versioned name, and it is the default | |
1396 | version. | |
1397 | ||
1398 | Overriding means that we already saw a | |
1399 | definition for the symbol SHORTNAME in a | |
1400 | regular object, and it is overriding the | |
1401 | symbol defined in the dynamic object. | |
1402 | ||
1403 | When this happens, we actually want to change | |
1404 | NAME, the symbol we just added, to refer to | |
1405 | SHORTNAME. This will cause references to | |
1406 | NAME in the shared object to become | |
1407 | references to SHORTNAME in the regular | |
1408 | object. This is what we expect when we | |
1409 | override a function in a shared object: that | |
1410 | the references in the shared object will be | |
1411 | mapped to the definition in the regular | |
1412 | object. */ | |
1413 | ||
677525e9 ILT |
1414 | while (hi->root.type == bfd_link_hash_indirect |
1415 | || hi->root.type == bfd_link_hash_warning) | |
1416 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1417 | ||
541a4b54 ILT |
1418 | h->root.type = bfd_link_hash_indirect; |
1419 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
1420 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) | |
1421 | { | |
1422 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC; | |
1423 | hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
1424 | if (! _bfd_elf_link_record_dynamic_symbol (info, hi)) | |
1425 | goto error_return; | |
1426 | } | |
52c92c7f | 1427 | |
541a4b54 ILT |
1428 | /* Now set HI to H, so that the following code |
1429 | will set the other fields correctly. */ | |
1430 | hi = h; | |
1431 | } | |
52c92c7f | 1432 | |
541a4b54 ILT |
1433 | /* If there is a duplicate definition somewhere, |
1434 | then HI may not point to an indirect symbol. We | |
1435 | will have reported an error to the user in that | |
1436 | case. */ | |
1437 | ||
1438 | if (hi->root.type == bfd_link_hash_indirect) | |
1439 | { | |
1440 | struct elf_link_hash_entry *ht; | |
1441 | ||
1442 | /* If the symbol became indirect, then we assume | |
1443 | that we have not seen a definition before. */ | |
1444 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1445 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1446 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1447 | == 0); | |
1448 | ||
1449 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1450 | ||
1451 | /* Copy down any references that we may have | |
1452 | already seen to the symbol which just became | |
1453 | indirect. */ | |
1454 | ht->elf_link_hash_flags |= | |
1455 | (hi->elf_link_hash_flags | |
1456 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1457 | | ELF_LINK_HASH_REF_REGULAR)); | |
1458 | ||
1459 | /* Copy over the global table offset entry. | |
1460 | This may have been already set up by a | |
1461 | check_relocs routine. */ | |
1462 | if (ht->got_offset == (bfd_vma) -1) | |
52c92c7f | 1463 | { |
541a4b54 ILT |
1464 | ht->got_offset = hi->got_offset; |
1465 | hi->got_offset = (bfd_vma) -1; | |
1466 | } | |
1467 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
e549b1d2 | 1468 | |
541a4b54 ILT |
1469 | if (ht->dynindx == -1) |
1470 | { | |
1471 | ht->dynindx = hi->dynindx; | |
1472 | ht->dynstr_index = hi->dynstr_index; | |
1473 | hi->dynindx = -1; | |
1474 | hi->dynstr_index = 0; | |
1475 | } | |
1476 | BFD_ASSERT (hi->dynindx == -1); | |
e549b1d2 | 1477 | |
541a4b54 ILT |
1478 | /* FIXME: There may be other information to copy |
1479 | over for particular targets. */ | |
1480 | ||
1481 | /* See if the new flags lead us to realize that | |
1482 | the symbol must be dynamic. */ | |
1483 | if (! dynsym) | |
1484 | { | |
1485 | if (! dynamic) | |
e549b1d2 | 1486 | { |
541a4b54 ILT |
1487 | if (info->shared |
1488 | || ((hi->elf_link_hash_flags | |
1489 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1490 | != 0)) | |
1491 | dynsym = true; | |
e549b1d2 | 1492 | } |
541a4b54 | 1493 | else |
e549b1d2 | 1494 | { |
541a4b54 ILT |
1495 | if ((hi->elf_link_hash_flags |
1496 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1497 | dynsym = true; | |
e549b1d2 | 1498 | } |
52c92c7f | 1499 | } |
d6bfcdb5 ILT |
1500 | } |
1501 | ||
1502 | /* We also need to define an indirection from the | |
1503 | nondefault version of the symbol. */ | |
1504 | ||
1505 | shortname = bfd_hash_allocate (&info->hash->table, | |
1506 | strlen (name)); | |
1507 | if (shortname == NULL) | |
1508 | goto error_return; | |
1509 | strncpy (shortname, name, p - name); | |
1510 | strcpy (shortname + (p - name), p + 1); | |
1511 | ||
044d7d49 | 1512 | /* Once again, merge with any existing symbol. */ |
0e039bdc ILT |
1513 | type_change_ok = false; |
1514 | size_change_ok = false; | |
044d7d49 ILT |
1515 | if (! elf_merge_symbol (abfd, info, shortname, &sym, &sec, |
1516 | &value, &hi, &override, | |
1517 | &type_change_ok, &size_change_ok)) | |
1518 | goto error_return; | |
d6bfcdb5 | 1519 | |
541a4b54 ILT |
1520 | if (override) |
1521 | { | |
1522 | /* Here SHORTNAME is a versioned name, so we | |
1523 | don't expect to see the type of override we | |
1524 | do in the case above. */ | |
1525 | (*_bfd_error_handler) | |
53d3ce37 | 1526 | (_("%s: warning: unexpected redefinition of `%s'"), |
541a4b54 ILT |
1527 | bfd_get_filename (abfd), shortname); |
1528 | } | |
1529 | else | |
d6bfcdb5 | 1530 | { |
52c92c7f ILT |
1531 | if (! (_bfd_generic_link_add_one_symbol |
1532 | (info, abfd, shortname, BSF_INDIRECT, | |
1533 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1534 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1535 | goto error_return; | |
1536 | ||
1537 | /* If there is a duplicate definition somewhere, | |
1538 | then HI may not point to an indirect symbol. | |
1539 | We will have reported an error to the user in | |
1540 | that case. */ | |
1541 | ||
1542 | if (hi->root.type == bfd_link_hash_indirect) | |
1543 | { | |
e549b1d2 ILT |
1544 | /* If the symbol became indirect, then we |
1545 | assume that we have not seen a definition | |
1546 | before. */ | |
1547 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1548 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1549 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1550 | == 0); | |
1551 | ||
1552 | /* Copy down any references that we may have | |
1553 | already seen to the symbol which just | |
1554 | became indirect. */ | |
1555 | h->elf_link_hash_flags |= | |
1556 | (hi->elf_link_hash_flags | |
1557 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1558 | | ELF_LINK_HASH_REF_REGULAR)); | |
1559 | ||
1560 | /* Copy over the global table offset entry. | |
1561 | This may have been already set up by a | |
1562 | check_relocs routine. */ | |
1563 | if (h->got_offset == (bfd_vma) -1) | |
1564 | { | |
1565 | h->got_offset = hi->got_offset; | |
1566 | hi->got_offset = (bfd_vma) -1; | |
1567 | } | |
1568 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
1569 | ||
1570 | if (h->dynindx == -1) | |
1571 | { | |
1572 | h->dynindx = hi->dynindx; | |
1573 | h->dynstr_index = hi->dynstr_index; | |
1574 | hi->dynindx = -1; | |
1575 | hi->dynstr_index = 0; | |
1576 | } | |
1577 | BFD_ASSERT (hi->dynindx == -1); | |
1578 | ||
1579 | /* FIXME: There may be other information to | |
1580 | copy over for particular targets. */ | |
1581 | ||
1582 | /* See if the new flags lead us to realize | |
1583 | that the symbol must be dynamic. */ | |
1584 | if (! dynsym) | |
1585 | { | |
1586 | if (! dynamic) | |
1587 | { | |
1588 | if (info->shared | |
1589 | || ((hi->elf_link_hash_flags | |
1590 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1591 | != 0)) | |
1592 | dynsym = true; | |
1593 | } | |
1594 | else | |
1595 | { | |
1596 | if ((hi->elf_link_hash_flags | |
1597 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1598 | dynsym = true; | |
1599 | } | |
1600 | } | |
52c92c7f | 1601 | } |
d6bfcdb5 | 1602 | } |
d044b40a ILT |
1603 | } |
1604 | } | |
1605 | ||
ede4eed4 KR |
1606 | if (dynsym && h->dynindx == -1) |
1607 | { | |
1608 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1609 | goto error_return; | |
452a5efb ILT |
1610 | if (h->weakdef != NULL |
1611 | && ! new_weakdef | |
1612 | && h->weakdef->dynindx == -1) | |
1613 | { | |
1614 | if (! _bfd_elf_link_record_dynamic_symbol (info, | |
1615 | h->weakdef)) | |
1616 | goto error_return; | |
1617 | } | |
ede4eed4 KR |
1618 | } |
1619 | } | |
1620 | } | |
1621 | ||
1622 | /* Now set the weakdefs field correctly for all the weak defined | |
1623 | symbols we found. The only way to do this is to search all the | |
1624 | symbols. Since we only need the information for non functions in | |
1625 | dynamic objects, that's the only time we actually put anything on | |
1626 | the list WEAKS. We need this information so that if a regular | |
1627 | object refers to a symbol defined weakly in a dynamic object, the | |
1628 | real symbol in the dynamic object is also put in the dynamic | |
1629 | symbols; we also must arrange for both symbols to point to the | |
1630 | same memory location. We could handle the general case of symbol | |
1631 | aliasing, but a general symbol alias can only be generated in | |
1632 | assembler code, handling it correctly would be very time | |
1633 | consuming, and other ELF linkers don't handle general aliasing | |
1634 | either. */ | |
1635 | while (weaks != NULL) | |
1636 | { | |
1637 | struct elf_link_hash_entry *hlook; | |
1638 | asection *slook; | |
1639 | bfd_vma vlook; | |
1640 | struct elf_link_hash_entry **hpp; | |
1641 | struct elf_link_hash_entry **hppend; | |
1642 | ||
1643 | hlook = weaks; | |
1644 | weaks = hlook->weakdef; | |
1645 | hlook->weakdef = NULL; | |
1646 | ||
1647 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
1648 | || hlook->root.type == bfd_link_hash_defweak | |
1649 | || hlook->root.type == bfd_link_hash_common | |
1650 | || hlook->root.type == bfd_link_hash_indirect); | |
1651 | slook = hlook->root.u.def.section; | |
1652 | vlook = hlook->root.u.def.value; | |
1653 | ||
1654 | hpp = elf_sym_hashes (abfd); | |
1655 | hppend = hpp + extsymcount; | |
1656 | for (; hpp < hppend; hpp++) | |
1657 | { | |
1658 | struct elf_link_hash_entry *h; | |
1659 | ||
1660 | h = *hpp; | |
1661 | if (h != NULL && h != hlook | |
d2bb6c79 | 1662 | && h->root.type == bfd_link_hash_defined |
ede4eed4 KR |
1663 | && h->root.u.def.section == slook |
1664 | && h->root.u.def.value == vlook) | |
1665 | { | |
1666 | hlook->weakdef = h; | |
1667 | ||
1668 | /* If the weak definition is in the list of dynamic | |
1669 | symbols, make sure the real definition is put there | |
1670 | as well. */ | |
1671 | if (hlook->dynindx != -1 | |
1672 | && h->dynindx == -1) | |
1673 | { | |
1674 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1675 | goto error_return; | |
1676 | } | |
1677 | ||
440f3914 ILT |
1678 | /* If the real definition is in the list of dynamic |
1679 | symbols, make sure the weak definition is put there | |
1680 | as well. If we don't do this, then the dynamic | |
1681 | loader might not merge the entries for the real | |
1682 | definition and the weak definition. */ | |
1683 | if (h->dynindx != -1 | |
1684 | && hlook->dynindx == -1) | |
1685 | { | |
1686 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
1687 | goto error_return; | |
1688 | } | |
1689 | ||
ede4eed4 KR |
1690 | break; |
1691 | } | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | if (buf != NULL) | |
1696 | { | |
1697 | free (buf); | |
1698 | buf = NULL; | |
1699 | } | |
1700 | ||
d044b40a ILT |
1701 | if (extversym != NULL) |
1702 | { | |
1703 | free (extversym); | |
1704 | extversym = NULL; | |
1705 | } | |
1706 | ||
ede4eed4 KR |
1707 | /* If this object is the same format as the output object, and it is |
1708 | not a shared library, then let the backend look through the | |
1709 | relocs. | |
1710 | ||
1711 | This is required to build global offset table entries and to | |
1712 | arrange for dynamic relocs. It is not required for the | |
1713 | particular common case of linking non PIC code, even when linking | |
1714 | against shared libraries, but unfortunately there is no way of | |
1715 | knowing whether an object file has been compiled PIC or not. | |
1716 | Looking through the relocs is not particularly time consuming. | |
1717 | The problem is that we must either (1) keep the relocs in memory, | |
1718 | which causes the linker to require additional runtime memory or | |
1719 | (2) read the relocs twice from the input file, which wastes time. | |
1720 | This would be a good case for using mmap. | |
1721 | ||
1722 | I have no idea how to handle linking PIC code into a file of a | |
1723 | different format. It probably can't be done. */ | |
1724 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
1725 | if (! dynamic | |
1726 | && abfd->xvec == info->hash->creator | |
1727 | && check_relocs != NULL) | |
1728 | { | |
1729 | asection *o; | |
1730 | ||
1731 | for (o = abfd->sections; o != NULL; o = o->next) | |
1732 | { | |
1733 | Elf_Internal_Rela *internal_relocs; | |
1734 | boolean ok; | |
1735 | ||
1736 | if ((o->flags & SEC_RELOC) == 0 | |
a0c80726 ILT |
1737 | || o->reloc_count == 0 |
1738 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
94e05b00 ILT |
1739 | && (o->flags & SEC_DEBUGGING) != 0) |
1740 | || bfd_is_abs_section (o->output_section)) | |
ede4eed4 KR |
1741 | continue; |
1742 | ||
c86158e5 ILT |
1743 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
1744 | (abfd, o, (PTR) NULL, | |
1745 | (Elf_Internal_Rela *) NULL, | |
1746 | info->keep_memory)); | |
ede4eed4 KR |
1747 | if (internal_relocs == NULL) |
1748 | goto error_return; | |
1749 | ||
1750 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
1751 | ||
1752 | if (! info->keep_memory) | |
1753 | free (internal_relocs); | |
1754 | ||
1755 | if (! ok) | |
1756 | goto error_return; | |
1757 | } | |
1758 | } | |
1759 | ||
1726b8f0 ILT |
1760 | /* If this is a non-traditional, non-relocateable link, try to |
1761 | optimize the handling of the .stab/.stabstr sections. */ | |
1762 | if (! dynamic | |
1763 | && ! info->relocateable | |
1764 | && ! info->traditional_format | |
1765 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
1766 | && (info->strip != strip_all && info->strip != strip_debugger)) | |
1767 | { | |
1768 | asection *stab, *stabstr; | |
1769 | ||
1770 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
1771 | if (stab != NULL) | |
1772 | { | |
1773 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
1774 | ||
1775 | if (stabstr != NULL) | |
1776 | { | |
1777 | struct bfd_elf_section_data *secdata; | |
1778 | ||
1779 | secdata = elf_section_data (stab); | |
1780 | if (! _bfd_link_section_stabs (abfd, | |
1781 | &elf_hash_table (info)->stab_info, | |
1782 | stab, stabstr, | |
1783 | &secdata->stab_info)) | |
1784 | goto error_return; | |
1785 | } | |
1786 | } | |
1787 | } | |
1788 | ||
ede4eed4 KR |
1789 | return true; |
1790 | ||
1791 | error_return: | |
1792 | if (buf != NULL) | |
1793 | free (buf); | |
1794 | if (dynbuf != NULL) | |
1795 | free (dynbuf); | |
d044b40a ILT |
1796 | if (dynver != NULL) |
1797 | free (dynver); | |
1798 | if (extversym != NULL) | |
1799 | free (extversym); | |
ede4eed4 KR |
1800 | return false; |
1801 | } | |
1802 | ||
1803 | /* Create some sections which will be filled in with dynamic linking | |
1804 | information. ABFD is an input file which requires dynamic sections | |
1805 | to be created. The dynamic sections take up virtual memory space | |
1806 | when the final executable is run, so we need to create them before | |
1807 | addresses are assigned to the output sections. We work out the | |
1808 | actual contents and size of these sections later. */ | |
1809 | ||
1810 | boolean | |
1811 | elf_link_create_dynamic_sections (abfd, info) | |
1812 | bfd *abfd; | |
1813 | struct bfd_link_info *info; | |
1814 | { | |
1815 | flagword flags; | |
1816 | register asection *s; | |
1817 | struct elf_link_hash_entry *h; | |
1818 | struct elf_backend_data *bed; | |
1819 | ||
1820 | if (elf_hash_table (info)->dynamic_sections_created) | |
1821 | return true; | |
1822 | ||
1823 | /* Make sure that all dynamic sections use the same input BFD. */ | |
1824 | if (elf_hash_table (info)->dynobj == NULL) | |
1825 | elf_hash_table (info)->dynobj = abfd; | |
1826 | else | |
1827 | abfd = elf_hash_table (info)->dynobj; | |
1828 | ||
1829 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
1830 | sections. */ | |
ff12f303 ILT |
1831 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
1832 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
ede4eed4 KR |
1833 | |
1834 | /* A dynamically linked executable has a .interp section, but a | |
1835 | shared library does not. */ | |
1836 | if (! info->shared) | |
1837 | { | |
1838 | s = bfd_make_section (abfd, ".interp"); | |
1839 | if (s == NULL | |
1840 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1841 | return false; | |
1842 | } | |
1843 | ||
d044b40a ILT |
1844 | /* Create sections to hold version informations. These are removed |
1845 | if they are not needed. */ | |
1846 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
1847 | if (s == NULL | |
1848 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
65c2dd6e | 1849 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) |
d044b40a ILT |
1850 | return false; |
1851 | ||
1852 | s = bfd_make_section (abfd, ".gnu.version"); | |
1853 | if (s == NULL | |
1854 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1855 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
1856 | return false; | |
1857 | ||
1858 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
1859 | if (s == NULL | |
1860 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
65c2dd6e | 1861 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) |
d044b40a ILT |
1862 | return false; |
1863 | ||
ede4eed4 KR |
1864 | s = bfd_make_section (abfd, ".dynsym"); |
1865 | if (s == NULL | |
1866 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1867 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1868 | return false; | |
1869 | ||
1870 | s = bfd_make_section (abfd, ".dynstr"); | |
1871 | if (s == NULL | |
1872 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1873 | return false; | |
1874 | ||
1875 | /* Create a strtab to hold the dynamic symbol names. */ | |
1876 | if (elf_hash_table (info)->dynstr == NULL) | |
1877 | { | |
1878 | elf_hash_table (info)->dynstr = elf_stringtab_init (); | |
1879 | if (elf_hash_table (info)->dynstr == NULL) | |
1880 | return false; | |
1881 | } | |
1882 | ||
1883 | s = bfd_make_section (abfd, ".dynamic"); | |
1884 | if (s == NULL | |
1885 | || ! bfd_set_section_flags (abfd, s, flags) | |
1886 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1887 | return false; | |
1888 | ||
1889 | /* The special symbol _DYNAMIC is always set to the start of the | |
1890 | .dynamic section. This call occurs before we have processed the | |
1891 | symbols for any dynamic object, so we don't have to worry about | |
1892 | overriding a dynamic definition. We could set _DYNAMIC in a | |
1893 | linker script, but we only want to define it if we are, in fact, | |
1894 | creating a .dynamic section. We don't want to define it if there | |
1895 | is no .dynamic section, since on some ELF platforms the start up | |
1896 | code examines it to decide how to initialize the process. */ | |
1897 | h = NULL; | |
1898 | if (! (_bfd_generic_link_add_one_symbol | |
1899 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
1900 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
1901 | (struct bfd_link_hash_entry **) &h))) | |
1902 | return false; | |
1903 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1904 | h->type = STT_OBJECT; | |
1905 | ||
1906 | if (info->shared | |
1907 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1908 | return false; | |
1909 | ||
1910 | s = bfd_make_section (abfd, ".hash"); | |
1911 | if (s == NULL | |
1912 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1913 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1914 | return false; | |
1915 | ||
1916 | /* Let the backend create the rest of the sections. This lets the | |
1917 | backend set the right flags. The backend will normally create | |
1918 | the .got and .plt sections. */ | |
1919 | bed = get_elf_backend_data (abfd); | |
1920 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
1921 | return false; | |
1922 | ||
1923 | elf_hash_table (info)->dynamic_sections_created = true; | |
1924 | ||
1925 | return true; | |
1926 | } | |
1927 | ||
1928 | /* Add an entry to the .dynamic table. */ | |
1929 | ||
1930 | boolean | |
1931 | elf_add_dynamic_entry (info, tag, val) | |
1932 | struct bfd_link_info *info; | |
1933 | bfd_vma tag; | |
1934 | bfd_vma val; | |
1935 | { | |
1936 | Elf_Internal_Dyn dyn; | |
1937 | bfd *dynobj; | |
1938 | asection *s; | |
1939 | size_t newsize; | |
1940 | bfd_byte *newcontents; | |
1941 | ||
1942 | dynobj = elf_hash_table (info)->dynobj; | |
1943 | ||
1944 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1945 | BFD_ASSERT (s != NULL); | |
1946 | ||
1947 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
58142f10 | 1948 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
ede4eed4 | 1949 | if (newcontents == NULL) |
58142f10 | 1950 | return false; |
ede4eed4 KR |
1951 | |
1952 | dyn.d_tag = tag; | |
1953 | dyn.d_un.d_val = val; | |
1954 | elf_swap_dyn_out (dynobj, &dyn, | |
1955 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
1956 | ||
1957 | s->_raw_size = newsize; | |
1958 | s->contents = newcontents; | |
1959 | ||
1960 | return true; | |
1961 | } | |
3b3753b8 | 1962 | \f |
ede4eed4 KR |
1963 | |
1964 | /* Read and swap the relocs for a section. They may have been cached. | |
1965 | If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL, | |
1966 | they are used as buffers to read into. They are known to be large | |
1967 | enough. If the INTERNAL_RELOCS relocs argument is NULL, the return | |
1968 | value is allocated using either malloc or bfd_alloc, according to | |
1969 | the KEEP_MEMORY argument. */ | |
1970 | ||
c86158e5 ILT |
1971 | Elf_Internal_Rela * |
1972 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
1973 | keep_memory) | |
ede4eed4 KR |
1974 | bfd *abfd; |
1975 | asection *o; | |
1976 | PTR external_relocs; | |
1977 | Elf_Internal_Rela *internal_relocs; | |
1978 | boolean keep_memory; | |
1979 | { | |
1980 | Elf_Internal_Shdr *rel_hdr; | |
1981 | PTR alloc1 = NULL; | |
1982 | Elf_Internal_Rela *alloc2 = NULL; | |
1983 | ||
1984 | if (elf_section_data (o)->relocs != NULL) | |
1985 | return elf_section_data (o)->relocs; | |
1986 | ||
1987 | if (o->reloc_count == 0) | |
1988 | return NULL; | |
1989 | ||
1990 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
1991 | ||
1992 | if (internal_relocs == NULL) | |
1993 | { | |
1994 | size_t size; | |
1995 | ||
1996 | size = o->reloc_count * sizeof (Elf_Internal_Rela); | |
1997 | if (keep_memory) | |
1998 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
1999 | else | |
58142f10 | 2000 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
ede4eed4 | 2001 | if (internal_relocs == NULL) |
58142f10 | 2002 | goto error_return; |
ede4eed4 KR |
2003 | } |
2004 | ||
2005 | if (external_relocs == NULL) | |
2006 | { | |
58142f10 | 2007 | alloc1 = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size); |
ede4eed4 | 2008 | if (alloc1 == NULL) |
58142f10 | 2009 | goto error_return; |
ede4eed4 KR |
2010 | external_relocs = alloc1; |
2011 | } | |
2012 | ||
2013 | if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0) | |
2014 | || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd) | |
2015 | != rel_hdr->sh_size)) | |
2016 | goto error_return; | |
2017 | ||
2018 | /* Swap in the relocs. For convenience, we always produce an | |
2019 | Elf_Internal_Rela array; if the relocs are Rel, we set the addend | |
2020 | to 0. */ | |
2021 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
2022 | { | |
2023 | Elf_External_Rel *erel; | |
2024 | Elf_External_Rel *erelend; | |
2025 | Elf_Internal_Rela *irela; | |
2026 | ||
2027 | erel = (Elf_External_Rel *) external_relocs; | |
2028 | erelend = erel + o->reloc_count; | |
2029 | irela = internal_relocs; | |
2030 | for (; erel < erelend; erel++, irela++) | |
2031 | { | |
2032 | Elf_Internal_Rel irel; | |
2033 | ||
2034 | elf_swap_reloc_in (abfd, erel, &irel); | |
2035 | irela->r_offset = irel.r_offset; | |
2036 | irela->r_info = irel.r_info; | |
2037 | irela->r_addend = 0; | |
2038 | } | |
2039 | } | |
2040 | else | |
2041 | { | |
2042 | Elf_External_Rela *erela; | |
2043 | Elf_External_Rela *erelaend; | |
2044 | Elf_Internal_Rela *irela; | |
2045 | ||
2046 | BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)); | |
2047 | ||
2048 | erela = (Elf_External_Rela *) external_relocs; | |
2049 | erelaend = erela + o->reloc_count; | |
2050 | irela = internal_relocs; | |
2051 | for (; erela < erelaend; erela++, irela++) | |
2052 | elf_swap_reloca_in (abfd, erela, irela); | |
2053 | } | |
2054 | ||
2055 | /* Cache the results for next time, if we can. */ | |
2056 | if (keep_memory) | |
2057 | elf_section_data (o)->relocs = internal_relocs; | |
ff12f303 | 2058 | |
ede4eed4 KR |
2059 | if (alloc1 != NULL) |
2060 | free (alloc1); | |
2061 | ||
2062 | /* Don't free alloc2, since if it was allocated we are passing it | |
2063 | back (under the name of internal_relocs). */ | |
2064 | ||
2065 | return internal_relocs; | |
2066 | ||
2067 | error_return: | |
2068 | if (alloc1 != NULL) | |
2069 | free (alloc1); | |
2070 | if (alloc2 != NULL) | |
2071 | free (alloc2); | |
2072 | return NULL; | |
2073 | } | |
3b3753b8 | 2074 | \f |
ede4eed4 KR |
2075 | |
2076 | /* Record an assignment to a symbol made by a linker script. We need | |
2077 | this in case some dynamic object refers to this symbol. */ | |
2078 | ||
2079 | /*ARGSUSED*/ | |
2080 | boolean | |
2081 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) | |
2082 | bfd *output_bfd; | |
2083 | struct bfd_link_info *info; | |
2084 | const char *name; | |
2085 | boolean provide; | |
2086 | { | |
2087 | struct elf_link_hash_entry *h; | |
2088 | ||
2089 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
2090 | return true; | |
2091 | ||
2092 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false); | |
2093 | if (h == NULL) | |
2094 | return false; | |
2095 | ||
869b7d80 ILT |
2096 | if (h->root.type == bfd_link_hash_new) |
2097 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
2098 | ||
ede4eed4 KR |
2099 | /* If this symbol is being provided by the linker script, and it is |
2100 | currently defined by a dynamic object, but not by a regular | |
2101 | object, then mark it as undefined so that the generic linker will | |
2102 | force the correct value. */ | |
2103 | if (provide | |
2104 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2105 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2106 | h->root.type = bfd_link_hash_undefined; | |
2107 | ||
13eb6306 ILT |
2108 | /* If this symbol is not being provided by the linker script, and it is |
2109 | currently defined by a dynamic object, but not by a regular object, | |
2110 | then clear out any version information because the symbol will not be | |
2111 | associated with the dynamic object any more. */ | |
2112 | if (!provide | |
2113 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2114 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2115 | h->verinfo.verdef = NULL; | |
2116 | ||
ede4eed4 KR |
2117 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
2118 | h->type = STT_OBJECT; | |
2119 | ||
2120 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
2121 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
2122 | || info->shared) | |
2123 | && h->dynindx == -1) | |
2124 | { | |
2125 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2126 | return false; | |
2127 | ||
2128 | /* If this is a weak defined symbol, and we know a corresponding | |
2129 | real symbol from the same dynamic object, make sure the real | |
2130 | symbol is also made into a dynamic symbol. */ | |
2131 | if (h->weakdef != NULL | |
2132 | && h->weakdef->dynindx == -1) | |
2133 | { | |
2134 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
2135 | return false; | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | return true; | |
2140 | } | |
3b3753b8 | 2141 | \f |
d044b40a ILT |
2142 | /* This structure is used to pass information to |
2143 | elf_link_assign_sym_version. */ | |
2144 | ||
2145 | struct elf_assign_sym_version_info | |
2146 | { | |
2147 | /* Output BFD. */ | |
2148 | bfd *output_bfd; | |
2149 | /* General link information. */ | |
2150 | struct bfd_link_info *info; | |
2151 | /* Version tree. */ | |
2152 | struct bfd_elf_version_tree *verdefs; | |
2153 | /* Whether we are exporting all dynamic symbols. */ | |
2154 | boolean export_dynamic; | |
2155 | /* Whether we removed any symbols from the dynamic symbol table. */ | |
2156 | boolean removed_dynamic; | |
2157 | /* Whether we had a failure. */ | |
2158 | boolean failed; | |
2159 | }; | |
2160 | ||
2161 | /* This structure is used to pass information to | |
2162 | elf_link_find_version_dependencies. */ | |
2163 | ||
2164 | struct elf_find_verdep_info | |
2165 | { | |
2166 | /* Output BFD. */ | |
2167 | bfd *output_bfd; | |
2168 | /* General link information. */ | |
2169 | struct bfd_link_info *info; | |
2170 | /* The number of dependencies. */ | |
2171 | unsigned int vers; | |
2172 | /* Whether we had a failure. */ | |
2173 | boolean failed; | |
2174 | }; | |
ede4eed4 KR |
2175 | |
2176 | /* Array used to determine the number of hash table buckets to use | |
2177 | based on the number of symbols there are. If there are fewer than | |
2178 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2179 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6b8ec6f3 | 2180 | than 32771 buckets. */ |
ede4eed4 KR |
2181 | |
2182 | static const size_t elf_buckets[] = | |
2183 | { | |
6b8ec6f3 ILT |
2184 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, |
2185 | 16411, 32771, 0 | |
ede4eed4 KR |
2186 | }; |
2187 | ||
2188 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2189 | called by the ELF linker emulation before_allocation routine. We | |
2190 | must set the sizes of the sections before the linker sets the | |
2191 | addresses of the various sections. */ | |
2192 | ||
2193 | boolean | |
2194 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, | |
148437ec | 2195 | export_dynamic, filter_shlib, |
d044b40a ILT |
2196 | auxiliary_filters, info, sinterpptr, |
2197 | verdefs) | |
ede4eed4 KR |
2198 | bfd *output_bfd; |
2199 | const char *soname; | |
2200 | const char *rpath; | |
2201 | boolean export_dynamic; | |
148437ec | 2202 | const char *filter_shlib; |
db109ca2 | 2203 | const char * const *auxiliary_filters; |
ede4eed4 KR |
2204 | struct bfd_link_info *info; |
2205 | asection **sinterpptr; | |
d044b40a | 2206 | struct bfd_elf_version_tree *verdefs; |
ede4eed4 | 2207 | { |
d044b40a | 2208 | bfd_size_type soname_indx; |
ede4eed4 KR |
2209 | bfd *dynobj; |
2210 | struct elf_backend_data *bed; | |
e549b1d2 | 2211 | bfd_size_type old_dynsymcount; |
c19fbe0f | 2212 | struct elf_assign_sym_version_info asvinfo; |
ede4eed4 KR |
2213 | |
2214 | *sinterpptr = NULL; | |
2215 | ||
f6727b90 | 2216 | soname_indx = (bfd_size_type) -1; |
d044b40a | 2217 | |
ede4eed4 KR |
2218 | if (info->hash->creator->flavour != bfd_target_elf_flavour) |
2219 | return true; | |
2220 | ||
ff12f303 ILT |
2221 | /* The backend may have to create some sections regardless of whether |
2222 | we're dynamic or not. */ | |
2223 | bed = get_elf_backend_data (output_bfd); | |
2224 | if (bed->elf_backend_always_size_sections | |
2225 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
2226 | return false; | |
2227 | ||
ede4eed4 KR |
2228 | dynobj = elf_hash_table (info)->dynobj; |
2229 | ||
2230 | /* If there were no dynamic objects in the link, there is nothing to | |
2231 | do here. */ | |
2232 | if (dynobj == NULL) | |
2233 | return true; | |
2234 | ||
2235 | /* If we are supposed to export all symbols into the dynamic symbol | |
2236 | table (this is not the normal case), then do so. */ | |
2237 | if (export_dynamic) | |
2238 | { | |
2239 | struct elf_info_failed eif; | |
2240 | ||
2241 | eif.failed = false; | |
2242 | eif.info = info; | |
2243 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, | |
2244 | (PTR) &eif); | |
2245 | if (eif.failed) | |
2246 | return false; | |
2247 | } | |
2248 | ||
2249 | if (elf_hash_table (info)->dynamic_sections_created) | |
2250 | { | |
2251 | struct elf_info_failed eif; | |
73a68447 | 2252 | struct elf_link_hash_entry *h; |
ede4eed4 KR |
2253 | bfd_size_type strsize; |
2254 | ||
2255 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
2256 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
2257 | ||
2258 | if (soname != NULL) | |
2259 | { | |
d044b40a ILT |
2260 | soname_indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, |
2261 | soname, true, true); | |
2262 | if (soname_indx == (bfd_size_type) -1 | |
2263 | || ! elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
ede4eed4 | 2264 | return false; |
ff12f303 | 2265 | } |
ede4eed4 | 2266 | |
951fe66d ILT |
2267 | if (info->symbolic) |
2268 | { | |
2269 | if (! elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
2270 | return false; | |
2271 | } | |
2272 | ||
ede4eed4 KR |
2273 | if (rpath != NULL) |
2274 | { | |
2275 | bfd_size_type indx; | |
2276 | ||
2277 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath, | |
2278 | true, true); | |
2279 | if (indx == (bfd_size_type) -1 | |
2280 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
2281 | return false; | |
2282 | } | |
2283 | ||
148437ec ILT |
2284 | if (filter_shlib != NULL) |
2285 | { | |
2286 | bfd_size_type indx; | |
2287 | ||
2288 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2289 | filter_shlib, true, true); | |
2290 | if (indx == (bfd_size_type) -1 | |
2291 | || ! elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
2292 | return false; | |
2293 | } | |
2294 | ||
db109ca2 | 2295 | if (auxiliary_filters != NULL) |
148437ec | 2296 | { |
db109ca2 | 2297 | const char * const *p; |
148437ec | 2298 | |
db109ca2 ILT |
2299 | for (p = auxiliary_filters; *p != NULL; p++) |
2300 | { | |
2301 | bfd_size_type indx; | |
2302 | ||
2303 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2304 | *p, true, true); | |
2305 | if (indx == (bfd_size_type) -1 | |
2306 | || ! elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
2307 | return false; | |
2308 | } | |
148437ec ILT |
2309 | } |
2310 | ||
c19fbe0f ILT |
2311 | /* Attach all the symbols to their version information. */ |
2312 | asvinfo.output_bfd = output_bfd; | |
2313 | asvinfo.info = info; | |
2314 | asvinfo.verdefs = verdefs; | |
2315 | asvinfo.export_dynamic = export_dynamic; | |
2316 | asvinfo.removed_dynamic = false; | |
2317 | asvinfo.failed = false; | |
2318 | ||
2319 | elf_link_hash_traverse (elf_hash_table (info), | |
2320 | elf_link_assign_sym_version, | |
2321 | (PTR) &asvinfo); | |
2322 | if (asvinfo.failed) | |
2323 | return false; | |
2324 | ||
ede4eed4 KR |
2325 | /* Find all symbols which were defined in a dynamic object and make |
2326 | the backend pick a reasonable value for them. */ | |
2327 | eif.failed = false; | |
2328 | eif.info = info; | |
2329 | elf_link_hash_traverse (elf_hash_table (info), | |
2330 | elf_adjust_dynamic_symbol, | |
2331 | (PTR) &eif); | |
2332 | if (eif.failed) | |
2333 | return false; | |
2334 | ||
2335 | /* Add some entries to the .dynamic section. We fill in some of the | |
2336 | values later, in elf_bfd_final_link, but we must add the entries | |
2337 | now so that we know the final size of the .dynamic section. */ | |
73a68447 ILT |
2338 | h = elf_link_hash_lookup (elf_hash_table (info), "_init", false, |
2339 | false, false); | |
2340 | if (h != NULL | |
2341 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2342 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2343 | { |
2344 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
2345 | return false; | |
2346 | } | |
73a68447 ILT |
2347 | h = elf_link_hash_lookup (elf_hash_table (info), "_fini", false, |
2348 | false, false); | |
2349 | if (h != NULL | |
2350 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2351 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2352 | { |
2353 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
2354 | return false; | |
2355 | } | |
2356 | strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2357 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
2358 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
2359 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
2360 | || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
2361 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
2362 | sizeof (Elf_External_Sym))) | |
2363 | return false; | |
2364 | } | |
2365 | ||
2366 | /* The backend must work out the sizes of all the other dynamic | |
2367 | sections. */ | |
e549b1d2 | 2368 | old_dynsymcount = elf_hash_table (info)->dynsymcount; |
ede4eed4 KR |
2369 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
2370 | return false; | |
2371 | ||
2372 | if (elf_hash_table (info)->dynamic_sections_created) | |
2373 | { | |
2374 | size_t dynsymcount; | |
2375 | asection *s; | |
2376 | size_t i; | |
2377 | size_t bucketcount = 0; | |
2378 | Elf_Internal_Sym isym; | |
2379 | ||
d044b40a ILT |
2380 | /* Set up the version definition section. */ |
2381 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
2382 | BFD_ASSERT (s != NULL); | |
d6bfcdb5 | 2383 | |
d6bfcdb5 ILT |
2384 | /* We may have created additional version definitions if we are |
2385 | just linking a regular application. */ | |
c19fbe0f | 2386 | verdefs = asvinfo.verdefs; |
d6bfcdb5 | 2387 | |
d044b40a ILT |
2388 | if (verdefs == NULL) |
2389 | { | |
d044b40a ILT |
2390 | asection **spp; |
2391 | ||
d044b40a ILT |
2392 | /* Don't include this section in the output file. */ |
2393 | for (spp = &output_bfd->sections; | |
2394 | *spp != s->output_section; | |
2395 | spp = &(*spp)->next) | |
2396 | ; | |
2397 | *spp = s->output_section->next; | |
2398 | --output_bfd->section_count; | |
2399 | } | |
2400 | else | |
2401 | { | |
d044b40a ILT |
2402 | unsigned int cdefs; |
2403 | bfd_size_type size; | |
2404 | struct bfd_elf_version_tree *t; | |
2405 | bfd_byte *p; | |
2406 | Elf_Internal_Verdef def; | |
2407 | Elf_Internal_Verdaux defaux; | |
2408 | ||
c19fbe0f | 2409 | if (asvinfo.removed_dynamic) |
d044b40a ILT |
2410 | { |
2411 | /* Some dynamic symbols were changed to be local | |
e549b1d2 ILT |
2412 | symbols. In this case, we renumber all of the |
2413 | dynamic symbols, so that we don't have a hole. If | |
2414 | the backend changed dynsymcount, then assume that the | |
2415 | new symbols are at the start. This is the case on | |
2416 | the MIPS. FIXME: The names of the removed symbols | |
2417 | will still be in the dynamic string table, wasting | |
2418 | space. */ | |
2419 | elf_hash_table (info)->dynsymcount = | |
2420 | 1 + (elf_hash_table (info)->dynsymcount - old_dynsymcount); | |
d044b40a ILT |
2421 | elf_link_hash_traverse (elf_hash_table (info), |
2422 | elf_link_renumber_dynsyms, | |
2423 | (PTR) info); | |
2424 | } | |
2425 | ||
2426 | cdefs = 0; | |
2427 | size = 0; | |
2428 | ||
2429 | /* Make space for the base version. */ | |
2430 | size += sizeof (Elf_External_Verdef); | |
2431 | size += sizeof (Elf_External_Verdaux); | |
2432 | ++cdefs; | |
2433 | ||
2434 | for (t = verdefs; t != NULL; t = t->next) | |
2435 | { | |
2436 | struct bfd_elf_version_deps *n; | |
2437 | ||
2438 | size += sizeof (Elf_External_Verdef); | |
2439 | size += sizeof (Elf_External_Verdaux); | |
2440 | ++cdefs; | |
2441 | ||
2442 | for (n = t->deps; n != NULL; n = n->next) | |
2443 | size += sizeof (Elf_External_Verdaux); | |
2444 | } | |
2445 | ||
2446 | s->_raw_size = size; | |
2447 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2448 | if (s->contents == NULL && s->_raw_size != 0) | |
2449 | return false; | |
2450 | ||
2451 | /* Fill in the version definition section. */ | |
2452 | ||
2453 | p = s->contents; | |
2454 | ||
2455 | def.vd_version = VER_DEF_CURRENT; | |
2456 | def.vd_flags = VER_FLG_BASE; | |
2457 | def.vd_ndx = 1; | |
2458 | def.vd_cnt = 1; | |
2459 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2460 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2461 | + sizeof (Elf_External_Verdaux)); | |
2462 | ||
f6727b90 | 2463 | if (soname_indx != (bfd_size_type) -1) |
d044b40a ILT |
2464 | { |
2465 | def.vd_hash = bfd_elf_hash ((const unsigned char *) soname); | |
2466 | defaux.vda_name = soname_indx; | |
2467 | } | |
2468 | else | |
2469 | { | |
2470 | const char *name; | |
2471 | bfd_size_type indx; | |
2472 | ||
2473 | name = output_bfd->filename; | |
2474 | def.vd_hash = bfd_elf_hash ((const unsigned char *) name); | |
2475 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2476 | name, true, false); | |
2477 | if (indx == (bfd_size_type) -1) | |
2478 | return false; | |
2479 | defaux.vda_name = indx; | |
2480 | } | |
2481 | defaux.vda_next = 0; | |
2482 | ||
2483 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2484 | (Elf_External_Verdef *)p); | |
2485 | p += sizeof (Elf_External_Verdef); | |
2486 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2487 | (Elf_External_Verdaux *) p); | |
2488 | p += sizeof (Elf_External_Verdaux); | |
2489 | ||
2490 | for (t = verdefs; t != NULL; t = t->next) | |
2491 | { | |
2492 | unsigned int cdeps; | |
2493 | struct bfd_elf_version_deps *n; | |
2494 | struct elf_link_hash_entry *h; | |
2495 | ||
2496 | cdeps = 0; | |
2497 | for (n = t->deps; n != NULL; n = n->next) | |
2498 | ++cdeps; | |
2499 | ||
2500 | /* Add a symbol representing this version. */ | |
2501 | h = NULL; | |
2502 | if (! (_bfd_generic_link_add_one_symbol | |
2503 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
2504 | (bfd_vma) 0, (const char *) NULL, false, | |
2505 | get_elf_backend_data (dynobj)->collect, | |
2506 | (struct bfd_link_hash_entry **) &h))) | |
2507 | return false; | |
2508 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
2509 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2510 | h->type = STT_OBJECT; | |
2511 | h->verinfo.vertree = t; | |
2512 | ||
d6bfcdb5 ILT |
2513 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) |
2514 | return false; | |
d044b40a ILT |
2515 | |
2516 | def.vd_version = VER_DEF_CURRENT; | |
2517 | def.vd_flags = 0; | |
2518 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
2519 | def.vd_flags |= VER_FLG_WEAK; | |
2520 | def.vd_ndx = t->vernum + 1; | |
2521 | def.vd_cnt = cdeps + 1; | |
2522 | def.vd_hash = bfd_elf_hash ((const unsigned char *) t->name); | |
2523 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2524 | if (t->next != NULL) | |
2525 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2526 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
2527 | else | |
2528 | def.vd_next = 0; | |
2529 | ||
2530 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2531 | (Elf_External_Verdef *) p); | |
2532 | p += sizeof (Elf_External_Verdef); | |
2533 | ||
2534 | defaux.vda_name = h->dynstr_index; | |
2535 | if (t->deps == NULL) | |
2536 | defaux.vda_next = 0; | |
2537 | else | |
2538 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2539 | t->name_indx = defaux.vda_name; | |
2540 | ||
2541 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2542 | (Elf_External_Verdaux *) p); | |
2543 | p += sizeof (Elf_External_Verdaux); | |
2544 | ||
2545 | for (n = t->deps; n != NULL; n = n->next) | |
2546 | { | |
9793236c ILT |
2547 | if (n->version_needed == NULL) |
2548 | { | |
2549 | /* This can happen if there was an error in the | |
2550 | version script. */ | |
2551 | defaux.vda_name = 0; | |
2552 | } | |
2553 | else | |
2554 | defaux.vda_name = n->version_needed->name_indx; | |
d044b40a ILT |
2555 | if (n->next == NULL) |
2556 | defaux.vda_next = 0; | |
2557 | else | |
2558 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2559 | ||
2560 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2561 | (Elf_External_Verdaux *) p); | |
2562 | p += sizeof (Elf_External_Verdaux); | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | if (! elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
2567 | || ! elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
2568 | return false; | |
2569 | ||
2570 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
2571 | } | |
2572 | ||
2573 | /* Work out the size of the version reference section. */ | |
2574 | ||
2575 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
2576 | BFD_ASSERT (s != NULL); | |
2577 | { | |
2578 | struct elf_find_verdep_info sinfo; | |
2579 | ||
2580 | sinfo.output_bfd = output_bfd; | |
2581 | sinfo.info = info; | |
2582 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
2583 | if (sinfo.vers == 0) | |
2584 | sinfo.vers = 1; | |
2585 | sinfo.failed = false; | |
2586 | ||
2587 | elf_link_hash_traverse (elf_hash_table (info), | |
2588 | elf_link_find_version_dependencies, | |
2589 | (PTR) &sinfo); | |
2590 | ||
2591 | if (elf_tdata (output_bfd)->verref == NULL) | |
2592 | { | |
2593 | asection **spp; | |
2594 | ||
2595 | /* We don't have any version definitions, so we can just | |
2596 | remove the section. */ | |
2597 | ||
2598 | for (spp = &output_bfd->sections; | |
2599 | *spp != s->output_section; | |
2600 | spp = &(*spp)->next) | |
2601 | ; | |
2602 | *spp = s->output_section->next; | |
2603 | --output_bfd->section_count; | |
2604 | } | |
2605 | else | |
2606 | { | |
2607 | Elf_Internal_Verneed *t; | |
2608 | unsigned int size; | |
2609 | unsigned int crefs; | |
2610 | bfd_byte *p; | |
2611 | ||
2612 | /* Build the version definition section. */ | |
d6bfcdb5 ILT |
2613 | size = 0; |
2614 | crefs = 0; | |
d044b40a ILT |
2615 | for (t = elf_tdata (output_bfd)->verref; |
2616 | t != NULL; | |
2617 | t = t->vn_nextref) | |
2618 | { | |
2619 | Elf_Internal_Vernaux *a; | |
2620 | ||
2621 | size += sizeof (Elf_External_Verneed); | |
2622 | ++crefs; | |
2623 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2624 | size += sizeof (Elf_External_Vernaux); | |
2625 | } | |
2626 | ||
2627 | s->_raw_size = size; | |
2628 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, size); | |
2629 | if (s->contents == NULL) | |
2630 | return false; | |
2631 | ||
2632 | p = s->contents; | |
2633 | for (t = elf_tdata (output_bfd)->verref; | |
2634 | t != NULL; | |
2635 | t = t->vn_nextref) | |
2636 | { | |
2637 | unsigned int caux; | |
2638 | Elf_Internal_Vernaux *a; | |
2639 | bfd_size_type indx; | |
2640 | ||
2641 | caux = 0; | |
2642 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2643 | ++caux; | |
2644 | ||
2645 | t->vn_version = VER_NEED_CURRENT; | |
2646 | t->vn_cnt = caux; | |
601acd61 UD |
2647 | if (elf_dt_name (t->vn_bfd) != NULL) |
2648 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2649 | elf_dt_name (t->vn_bfd), | |
2650 | true, false); | |
2651 | else | |
2652 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2653 | t->vn_bfd->filename, true, false); | |
d044b40a ILT |
2654 | if (indx == (bfd_size_type) -1) |
2655 | return false; | |
2656 | t->vn_file = indx; | |
2657 | t->vn_aux = sizeof (Elf_External_Verneed); | |
2658 | if (t->vn_nextref == NULL) | |
2659 | t->vn_next = 0; | |
2660 | else | |
2661 | t->vn_next = (sizeof (Elf_External_Verneed) | |
2662 | + caux * sizeof (Elf_External_Vernaux)); | |
2663 | ||
2664 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
2665 | (Elf_External_Verneed *) p); | |
2666 | p += sizeof (Elf_External_Verneed); | |
2667 | ||
2668 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2669 | { | |
2670 | a->vna_hash = bfd_elf_hash ((const unsigned char *) | |
2671 | a->vna_nodename); | |
2672 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2673 | a->vna_nodename, true, false); | |
2674 | if (indx == (bfd_size_type) -1) | |
2675 | return false; | |
2676 | a->vna_name = indx; | |
2677 | if (a->vna_nextptr == NULL) | |
2678 | a->vna_next = 0; | |
2679 | else | |
2680 | a->vna_next = sizeof (Elf_External_Vernaux); | |
2681 | ||
2682 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
2683 | (Elf_External_Vernaux *) p); | |
2684 | p += sizeof (Elf_External_Vernaux); | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | if (! elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
2689 | || ! elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
2690 | return false; | |
2691 | ||
2692 | elf_tdata (output_bfd)->cverrefs = crefs; | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
2697 | ||
2698 | /* Work out the size of the symbol version section. */ | |
2699 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
2700 | BFD_ASSERT (s != NULL); | |
2701 | if (dynsymcount == 0 | |
2702 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
2703 | { | |
2704 | asection **spp; | |
2705 | ||
2706 | /* We don't need any symbol versions; just discard the | |
2707 | section. */ | |
2708 | for (spp = &output_bfd->sections; | |
2709 | *spp != s->output_section; | |
2710 | spp = &(*spp)->next) | |
2711 | ; | |
2712 | *spp = s->output_section->next; | |
2713 | --output_bfd->section_count; | |
2714 | } | |
2715 | else | |
2716 | { | |
d044b40a | 2717 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); |
e549b1d2 | 2718 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
d044b40a ILT |
2719 | if (s->contents == NULL) |
2720 | return false; | |
2721 | ||
d044b40a ILT |
2722 | if (! elf_add_dynamic_entry (info, DT_VERSYM, 0)) |
2723 | return false; | |
2724 | } | |
2725 | ||
ede4eed4 KR |
2726 | /* Set the size of the .dynsym and .hash sections. We counted |
2727 | the number of dynamic symbols in elf_link_add_object_symbols. | |
2728 | We will build the contents of .dynsym and .hash when we build | |
2729 | the final symbol table, because until then we do not know the | |
2730 | correct value to give the symbols. We built the .dynstr | |
2731 | section as we went along in elf_link_add_object_symbols. */ | |
ede4eed4 KR |
2732 | s = bfd_get_section_by_name (dynobj, ".dynsym"); |
2733 | BFD_ASSERT (s != NULL); | |
2734 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
2735 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2736 | if (s->contents == NULL && s->_raw_size != 0) | |
a9713b91 | 2737 | return false; |
ede4eed4 KR |
2738 | |
2739 | /* The first entry in .dynsym is a dummy symbol. */ | |
2740 | isym.st_value = 0; | |
2741 | isym.st_size = 0; | |
2742 | isym.st_name = 0; | |
2743 | isym.st_info = 0; | |
2744 | isym.st_other = 0; | |
2745 | isym.st_shndx = 0; | |
2746 | elf_swap_symbol_out (output_bfd, &isym, | |
cf9fb9f2 | 2747 | (PTR) (Elf_External_Sym *) s->contents); |
ede4eed4 KR |
2748 | |
2749 | for (i = 0; elf_buckets[i] != 0; i++) | |
2750 | { | |
2751 | bucketcount = elf_buckets[i]; | |
2752 | if (dynsymcount < elf_buckets[i + 1]) | |
2753 | break; | |
2754 | } | |
2755 | ||
2756 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
2757 | BFD_ASSERT (s != NULL); | |
2758 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
2759 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2760 | if (s->contents == NULL) | |
a9713b91 | 2761 | return false; |
3fe22b98 | 2762 | memset (s->contents, 0, (size_t) s->_raw_size); |
ede4eed4 KR |
2763 | |
2764 | put_word (output_bfd, bucketcount, s->contents); | |
2765 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
2766 | ||
2767 | elf_hash_table (info)->bucketcount = bucketcount; | |
2768 | ||
2769 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
2770 | BFD_ASSERT (s != NULL); | |
2771 | s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2772 | ||
2773 | if (! elf_add_dynamic_entry (info, DT_NULL, 0)) | |
2774 | return false; | |
2775 | } | |
2776 | ||
2777 | return true; | |
2778 | } | |
3b3753b8 | 2779 | \f |
c19fbe0f ILT |
2780 | /* Fix up the flags for a symbol. This handles various cases which |
2781 | can only be fixed after all the input files are seen. This is | |
2782 | currently called by both adjust_dynamic_symbol and | |
2783 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2784 | the face of future changes. */ | |
ede4eed4 KR |
2785 | |
2786 | static boolean | |
c19fbe0f | 2787 | elf_fix_symbol_flags (h, eif) |
ede4eed4 | 2788 | struct elf_link_hash_entry *h; |
c19fbe0f | 2789 | struct elf_info_failed *eif; |
ede4eed4 | 2790 | { |
869b7d80 ILT |
2791 | /* If this symbol was mentioned in a non-ELF file, try to set |
2792 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2793 | permit a non-ELF file to correctly refer to a symbol defined in | |
2794 | an ELF dynamic object. */ | |
2795 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
2796 | { | |
2797 | if (h->root.type != bfd_link_hash_defined | |
2798 | && h->root.type != bfd_link_hash_defweak) | |
2799 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2800 | else | |
2801 | { | |
e303e2e3 ILT |
2802 | if (h->root.u.def.section->owner != NULL |
2803 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2804 | == bfd_target_elf_flavour)) | |
869b7d80 ILT |
2805 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; |
2806 | else | |
2807 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2808 | } | |
2809 | ||
c19fbe0f ILT |
2810 | if (h->dynindx == -1 |
2811 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2812 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
869b7d80 ILT |
2813 | { |
2814 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2815 | { | |
2816 | eif->failed = true; | |
2817 | return false; | |
2818 | } | |
2819 | } | |
2820 | } | |
2821 | ||
ce6a7731 ILT |
2822 | /* If this is a final link, and the symbol was defined as a common |
2823 | symbol in a regular object file, and there was no definition in | |
2824 | any dynamic object, then the linker will have allocated space for | |
2825 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
2826 | flag will not have been set. */ | |
2827 | if (h->root.type == bfd_link_hash_defined | |
2828 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
2829 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2830 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2831 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
2832 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2833 | ||
951fe66d ILT |
2834 | /* If -Bsymbolic was used (which means to bind references to global |
2835 | symbols to the definition within the shared object), and this | |
2836 | symbol was defined in a regular object, then it actually doesn't | |
2837 | need a PLT entry. */ | |
2838 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
2839 | && eif->info->shared | |
2840 | && eif->info->symbolic | |
2841 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2842 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT; | |
2843 | ||
c19fbe0f ILT |
2844 | return true; |
2845 | } | |
2846 | ||
2847 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2848 | called via elf_link_hash_traverse, and also calls itself | |
2849 | recursively. */ | |
2850 | ||
2851 | static boolean | |
2852 | elf_adjust_dynamic_symbol (h, data) | |
2853 | struct elf_link_hash_entry *h; | |
2854 | PTR data; | |
2855 | { | |
2856 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2857 | bfd *dynobj; | |
2858 | struct elf_backend_data *bed; | |
2859 | ||
2860 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2861 | if (h->root.type == bfd_link_hash_indirect) | |
2862 | return true; | |
2863 | ||
2864 | /* Fix the symbol flags. */ | |
2865 | if (! elf_fix_symbol_flags (h, eif)) | |
2866 | return false; | |
2867 | ||
ede4eed4 KR |
2868 | /* If this symbol does not require a PLT entry, and it is not |
2869 | defined by a dynamic object, or is not referenced by a regular | |
452a5efb ILT |
2870 | object, ignore it. We do have to handle a weak defined symbol, |
2871 | even if no regular object refers to it, if we decided to add it | |
2872 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2873 | about symbols which are defined by one dynamic object and | |
2874 | referenced by another one? */ | |
ede4eed4 KR |
2875 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 |
2876 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
2877 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
452a5efb ILT |
2878 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
2879 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
ede4eed4 KR |
2880 | return true; |
2881 | ||
2882 | /* If we've already adjusted this symbol, don't do it again. This | |
2883 | can happen via a recursive call. */ | |
2884 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
2885 | return true; | |
2886 | ||
2887 | /* Don't look at this symbol again. Note that we must set this | |
2888 | after checking the above conditions, because we may look at a | |
2889 | symbol once, decide not to do anything, and then get called | |
2890 | recursively later after REF_REGULAR is set below. */ | |
2891 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
2892 | ||
2893 | /* If this is a weak definition, and we know a real definition, and | |
2894 | the real symbol is not itself defined by a regular object file, | |
2895 | then get a good value for the real definition. We handle the | |
2896 | real symbol first, for the convenience of the backend routine. | |
2897 | ||
2898 | Note that there is a confusing case here. If the real definition | |
2899 | is defined by a regular object file, we don't get the real symbol | |
2900 | from the dynamic object, but we do get the weak symbol. If the | |
2901 | processor backend uses a COPY reloc, then if some routine in the | |
2902 | dynamic object changes the real symbol, we will not see that | |
2903 | change in the corresponding weak symbol. This is the way other | |
2904 | ELF linkers work as well, and seems to be a result of the shared | |
2905 | library model. | |
2906 | ||
2907 | I will clarify this issue. Most SVR4 shared libraries define the | |
2908 | variable _timezone and define timezone as a weak synonym. The | |
2909 | tzset call changes _timezone. If you write | |
2910 | extern int timezone; | |
2911 | int _timezone = 5; | |
2912 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2913 | you might expect that, since timezone is a synonym for _timezone, | |
2914 | the same number will print both times. However, if the processor | |
2915 | backend uses a COPY reloc, then actually timezone will be copied | |
2916 | into your process image, and, since you define _timezone | |
2917 | yourself, _timezone will not. Thus timezone and _timezone will | |
2918 | wind up at different memory locations. The tzset call will set | |
2919 | _timezone, leaving timezone unchanged. */ | |
2920 | ||
2921 | if (h->weakdef != NULL) | |
2922 | { | |
2923 | struct elf_link_hash_entry *weakdef; | |
2924 | ||
2925 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2926 | || h->root.type == bfd_link_hash_defweak); | |
2927 | weakdef = h->weakdef; | |
2928 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined | |
2929 | || weakdef->root.type == bfd_link_hash_defweak); | |
2930 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
2931 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2932 | { | |
2933 | /* This symbol is defined by a regular object file, so we | |
2934 | will not do anything special. Clear weakdef for the | |
2935 | convenience of the processor backend. */ | |
2936 | h->weakdef = NULL; | |
2937 | } | |
2938 | else | |
2939 | { | |
2940 | /* There is an implicit reference by a regular object file | |
2941 | via the weak symbol. */ | |
2942 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2943 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif)) | |
2944 | return false; | |
2945 | } | |
2946 | } | |
2947 | ||
2948 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2949 | bed = get_elf_backend_data (dynobj); | |
2950 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
2951 | { | |
2952 | eif->failed = true; | |
2953 | return false; | |
2954 | } | |
2955 | ||
2956 | return true; | |
2957 | } | |
2958 | \f | |
d044b40a ILT |
2959 | /* This routine is used to export all defined symbols into the dynamic |
2960 | symbol table. It is called via elf_link_hash_traverse. */ | |
2961 | ||
2962 | static boolean | |
2963 | elf_export_symbol (h, data) | |
2964 | struct elf_link_hash_entry *h; | |
2965 | PTR data; | |
2966 | { | |
2967 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2968 | ||
e549b1d2 ILT |
2969 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2970 | if (h->root.type == bfd_link_hash_indirect) | |
2971 | return true; | |
2972 | ||
d044b40a ILT |
2973 | if (h->dynindx == -1 |
2974 | && (h->elf_link_hash_flags | |
2975 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
2976 | { | |
2977 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2978 | { | |
2979 | eif->failed = true; | |
2980 | return false; | |
2981 | } | |
2982 | } | |
2983 | ||
2984 | return true; | |
2985 | } | |
2986 | \f | |
2987 | /* Look through the symbols which are defined in other shared | |
2988 | libraries and referenced here. Update the list of version | |
2989 | dependencies. This will be put into the .gnu.version_r section. | |
2990 | This function is called via elf_link_hash_traverse. */ | |
2991 | ||
2992 | static boolean | |
2993 | elf_link_find_version_dependencies (h, data) | |
2994 | struct elf_link_hash_entry *h; | |
2995 | PTR data; | |
2996 | { | |
2997 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
2998 | Elf_Internal_Verneed *t; | |
2999 | Elf_Internal_Vernaux *a; | |
3000 | ||
3001 | /* We only care about symbols defined in shared objects with version | |
3002 | information. */ | |
3003 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
a48ef404 | 3004 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
d044b40a ILT |
3005 | || h->dynindx == -1 |
3006 | || h->verinfo.verdef == NULL) | |
3007 | return true; | |
3008 | ||
3009 | /* See if we already know about this version. */ | |
3010 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
3011 | { | |
cf2cd4cf | 3012 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) |
d044b40a ILT |
3013 | continue; |
3014 | ||
3015 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3016 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
3017 | return true; | |
3018 | ||
3019 | break; | |
3020 | } | |
3021 | ||
3022 | /* This is a new version. Add it to tree we are building. */ | |
3023 | ||
3024 | if (t == NULL) | |
3025 | { | |
3026 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, sizeof *t); | |
3027 | if (t == NULL) | |
3028 | { | |
3029 | rinfo->failed = true; | |
3030 | return false; | |
3031 | } | |
3032 | ||
3033 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
3034 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
3035 | elf_tdata (rinfo->output_bfd)->verref = t; | |
3036 | } | |
3037 | ||
3038 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, sizeof *a); | |
3039 | ||
3040 | /* Note that we are copying a string pointer here, and testing it | |
3041 | above. If bfd_elf_string_from_elf_section is ever changed to | |
3042 | discard the string data when low in memory, this will have to be | |
3043 | fixed. */ | |
3044 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
3045 | ||
3046 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
3047 | a->vna_nextptr = t->vn_auxptr; | |
3048 | ||
3049 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
3050 | ++rinfo->vers; | |
3051 | ||
3052 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
3053 | ||
3054 | t->vn_auxptr = a; | |
3055 | ||
3056 | return true; | |
3057 | } | |
3058 | ||
3059 | /* Figure out appropriate versions for all the symbols. We may not | |
3060 | have the version number script until we have read all of the input | |
3061 | files, so until that point we don't know which symbols should be | |
3062 | local. This function is called via elf_link_hash_traverse. */ | |
3063 | ||
3064 | static boolean | |
3065 | elf_link_assign_sym_version (h, data) | |
3066 | struct elf_link_hash_entry *h; | |
3067 | PTR data; | |
3068 | { | |
3069 | struct elf_assign_sym_version_info *sinfo = | |
3070 | (struct elf_assign_sym_version_info *) data; | |
3071 | struct bfd_link_info *info = sinfo->info; | |
c19fbe0f | 3072 | struct elf_info_failed eif; |
d044b40a ILT |
3073 | char *p; |
3074 | ||
c19fbe0f ILT |
3075 | /* Fix the symbol flags. */ |
3076 | eif.failed = false; | |
3077 | eif.info = info; | |
3078 | if (! elf_fix_symbol_flags (h, &eif)) | |
3079 | { | |
3080 | if (eif.failed) | |
3081 | sinfo->failed = true; | |
3082 | return false; | |
3083 | } | |
3084 | ||
d044b40a ILT |
3085 | /* We only need version numbers for symbols defined in regular |
3086 | objects. */ | |
3087 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3088 | return true; | |
3089 | ||
3090 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
3091 | if (p != NULL && h->verinfo.vertree == NULL) | |
3092 | { | |
3093 | struct bfd_elf_version_tree *t; | |
3094 | boolean hidden; | |
3095 | ||
3096 | hidden = true; | |
3097 | ||
3098 | /* There are two consecutive ELF_VER_CHR characters if this is | |
3099 | not a hidden symbol. */ | |
3100 | ++p; | |
3101 | if (*p == ELF_VER_CHR) | |
3102 | { | |
3103 | hidden = false; | |
3104 | ++p; | |
3105 | } | |
3106 | ||
3107 | /* If there is no version string, we can just return out. */ | |
3108 | if (*p == '\0') | |
3109 | { | |
3110 | if (hidden) | |
3111 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
3112 | return true; | |
3113 | } | |
3114 | ||
3115 | /* Look for the version. If we find it, it is no longer weak. */ | |
3116 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
3117 | { | |
3118 | if (strcmp (t->name, p) == 0) | |
3119 | { | |
bccab630 RH |
3120 | int len; |
3121 | char *alc; | |
3122 | struct bfd_elf_version_expr *d; | |
3123 | ||
3124 | len = p - h->root.root.string; | |
3125 | alc = bfd_alloc (sinfo->output_bfd, len); | |
3126 | if (alc == NULL) | |
3127 | return false; | |
3128 | strncpy (alc, h->root.root.string, len - 1); | |
3129 | alc[len - 1] = '\0'; | |
3130 | if (alc[len - 2] == ELF_VER_CHR) | |
3131 | alc[len - 2] = '\0'; | |
3132 | ||
d044b40a ILT |
3133 | h->verinfo.vertree = t; |
3134 | t->used = true; | |
bccab630 RH |
3135 | d = NULL; |
3136 | ||
3137 | if (t->globals != NULL) | |
3138 | { | |
3139 | for (d = t->globals; d != NULL; d = d->next) | |
3140 | { | |
3141 | if ((d->match[0] == '*' && d->match[1] == '\0') | |
3142 | || fnmatch (d->match, alc, 0) == 0) | |
3143 | break; | |
3144 | } | |
3145 | } | |
d6bfcdb5 ILT |
3146 | |
3147 | /* See if there is anything to force this symbol to | |
3148 | local scope. */ | |
bccab630 | 3149 | if (d == NULL && t->locals != NULL) |
d6bfcdb5 | 3150 | { |
d6bfcdb5 ILT |
3151 | for (d = t->locals; d != NULL; d = d->next) |
3152 | { | |
3153 | if ((d->match[0] == '*' && d->match[1] == '\0') | |
3154 | || fnmatch (d->match, alc, 0) == 0) | |
3155 | { | |
3156 | if (h->dynindx != -1 | |
3157 | && info->shared | |
c19fbe0f | 3158 | && ! sinfo->export_dynamic) |
d6bfcdb5 ILT |
3159 | { |
3160 | sinfo->removed_dynamic = true; | |
52c92c7f | 3161 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
c19fbe0f ILT |
3162 | h->elf_link_hash_flags &=~ |
3163 | ELF_LINK_HASH_NEEDS_PLT; | |
d6bfcdb5 ILT |
3164 | h->dynindx = -1; |
3165 | /* FIXME: The name of the symbol has | |
3166 | already been recorded in the dynamic | |
3167 | string table section. */ | |
3168 | } | |
3169 | ||
3170 | break; | |
3171 | } | |
3172 | } | |
d6bfcdb5 ILT |
3173 | } |
3174 | ||
bccab630 | 3175 | bfd_release (sinfo->output_bfd, alc); |
d044b40a ILT |
3176 | break; |
3177 | } | |
3178 | } | |
3179 | ||
d6bfcdb5 ILT |
3180 | /* If we are building an application, we need to create a |
3181 | version node for this version. */ | |
3182 | if (t == NULL && ! info->shared) | |
3183 | { | |
3184 | struct bfd_elf_version_tree **pp; | |
3185 | int version_index; | |
3186 | ||
3187 | /* If we aren't going to export this symbol, we don't need | |
3188 | to worry about it. */ | |
3189 | if (h->dynindx == -1) | |
3190 | return true; | |
3191 | ||
3192 | t = ((struct bfd_elf_version_tree *) | |
3193 | bfd_alloc (sinfo->output_bfd, sizeof *t)); | |
3194 | if (t == NULL) | |
3195 | { | |
3196 | sinfo->failed = true; | |
3197 | return false; | |
3198 | } | |
3199 | ||
3200 | t->next = NULL; | |
3201 | t->name = p; | |
3202 | t->globals = NULL; | |
3203 | t->locals = NULL; | |
3204 | t->deps = NULL; | |
3205 | t->name_indx = (unsigned int) -1; | |
3206 | t->used = true; | |
3207 | ||
3208 | version_index = 1; | |
3209 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) | |
3210 | ++version_index; | |
3211 | t->vernum = version_index; | |
3212 | ||
3213 | *pp = t; | |
3214 | ||
3215 | h->verinfo.vertree = t; | |
3216 | } | |
3217 | else if (t == NULL) | |
d044b40a | 3218 | { |
d6bfcdb5 ILT |
3219 | /* We could not find the version for a symbol when |
3220 | generating a shared archive. Return an error. */ | |
d044b40a | 3221 | (*_bfd_error_handler) |
53d3ce37 | 3222 | (_("%s: undefined versioned symbol name %s"), |
52c92c7f | 3223 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); |
d044b40a ILT |
3224 | bfd_set_error (bfd_error_bad_value); |
3225 | sinfo->failed = true; | |
3226 | return false; | |
3227 | } | |
3228 | ||
3229 | if (hidden) | |
3230 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
3231 | } | |
3232 | ||
3233 | /* If we don't have a version for this symbol, see if we can find | |
3234 | something. */ | |
3235 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
3236 | { | |
3237 | struct bfd_elf_version_tree *t; | |
3238 | struct bfd_elf_version_tree *deflt; | |
3239 | struct bfd_elf_version_expr *d; | |
3240 | ||
3241 | /* See if can find what version this symbol is in. If the | |
c19fbe0f | 3242 | symbol is supposed to be local, then don't actually register |
d044b40a ILT |
3243 | it. */ |
3244 | deflt = NULL; | |
3245 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
3246 | { | |
3247 | if (t->globals != NULL) | |
3248 | { | |
3249 | for (d = t->globals; d != NULL; d = d->next) | |
3250 | { | |
3251 | if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
3252 | { | |
3253 | h->verinfo.vertree = t; | |
3254 | break; | |
3255 | } | |
3256 | } | |
3257 | ||
3258 | if (d != NULL) | |
3259 | break; | |
3260 | } | |
3261 | ||
3262 | if (t->locals != NULL) | |
3263 | { | |
3264 | for (d = t->locals; d != NULL; d = d->next) | |
3265 | { | |
3266 | if (d->match[0] == '*' && d->match[1] == '\0') | |
3267 | deflt = t; | |
3268 | else if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
3269 | { | |
3270 | h->verinfo.vertree = t; | |
3271 | if (h->dynindx != -1 | |
3272 | && info->shared | |
c19fbe0f | 3273 | && ! sinfo->export_dynamic) |
d044b40a ILT |
3274 | { |
3275 | sinfo->removed_dynamic = true; | |
52c92c7f | 3276 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
c19fbe0f | 3277 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT; |
d044b40a ILT |
3278 | h->dynindx = -1; |
3279 | /* FIXME: The name of the symbol has already | |
3280 | been recorded in the dynamic string table | |
3281 | section. */ | |
3282 | } | |
3283 | break; | |
3284 | } | |
3285 | } | |
3286 | ||
3287 | if (d != NULL) | |
3288 | break; | |
3289 | } | |
3290 | } | |
3291 | ||
3292 | if (deflt != NULL && h->verinfo.vertree == NULL) | |
3293 | { | |
3294 | h->verinfo.vertree = deflt; | |
3295 | if (h->dynindx != -1 | |
3296 | && info->shared | |
c19fbe0f | 3297 | && ! sinfo->export_dynamic) |
d044b40a ILT |
3298 | { |
3299 | sinfo->removed_dynamic = true; | |
52c92c7f | 3300 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
c19fbe0f | 3301 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT; |
d044b40a ILT |
3302 | h->dynindx = -1; |
3303 | /* FIXME: The name of the symbol has already been | |
3304 | recorded in the dynamic string table section. */ | |
3305 | } | |
3306 | } | |
3307 | } | |
3308 | ||
3309 | return true; | |
3310 | } | |
3311 | ||
3312 | /* This function is used to renumber the dynamic symbols, if some of | |
3313 | them are removed because they are marked as local. This is called | |
3314 | via elf_link_hash_traverse. */ | |
3315 | ||
3316 | static boolean | |
3317 | elf_link_renumber_dynsyms (h, data) | |
3318 | struct elf_link_hash_entry *h; | |
3319 | PTR data; | |
3320 | { | |
3321 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
3322 | ||
3323 | if (h->dynindx != -1) | |
3324 | { | |
3325 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
3326 | ++elf_hash_table (info)->dynsymcount; | |
3327 | } | |
3328 | ||
3329 | return true; | |
3330 | } | |
3331 | \f | |
ede4eed4 KR |
3332 | /* Final phase of ELF linker. */ |
3333 | ||
3334 | /* A structure we use to avoid passing large numbers of arguments. */ | |
3335 | ||
3336 | struct elf_final_link_info | |
3337 | { | |
3338 | /* General link information. */ | |
3339 | struct bfd_link_info *info; | |
3340 | /* Output BFD. */ | |
3341 | bfd *output_bfd; | |
3342 | /* Symbol string table. */ | |
3343 | struct bfd_strtab_hash *symstrtab; | |
3344 | /* .dynsym section. */ | |
3345 | asection *dynsym_sec; | |
3346 | /* .hash section. */ | |
3347 | asection *hash_sec; | |
d044b40a ILT |
3348 | /* symbol version section (.gnu.version). */ |
3349 | asection *symver_sec; | |
ede4eed4 KR |
3350 | /* Buffer large enough to hold contents of any section. */ |
3351 | bfd_byte *contents; | |
3352 | /* Buffer large enough to hold external relocs of any section. */ | |
3353 | PTR external_relocs; | |
3354 | /* Buffer large enough to hold internal relocs of any section. */ | |
3355 | Elf_Internal_Rela *internal_relocs; | |
3356 | /* Buffer large enough to hold external local symbols of any input | |
3357 | BFD. */ | |
3358 | Elf_External_Sym *external_syms; | |
3359 | /* Buffer large enough to hold internal local symbols of any input | |
3360 | BFD. */ | |
3361 | Elf_Internal_Sym *internal_syms; | |
3362 | /* Array large enough to hold a symbol index for each local symbol | |
3363 | of any input BFD. */ | |
3364 | long *indices; | |
3365 | /* Array large enough to hold a section pointer for each local | |
3366 | symbol of any input BFD. */ | |
3367 | asection **sections; | |
3368 | /* Buffer to hold swapped out symbols. */ | |
3369 | Elf_External_Sym *symbuf; | |
3370 | /* Number of swapped out symbols in buffer. */ | |
3371 | size_t symbuf_count; | |
3372 | /* Number of symbols which fit in symbuf. */ | |
3373 | size_t symbuf_size; | |
3374 | }; | |
3375 | ||
3376 | static boolean elf_link_output_sym | |
3377 | PARAMS ((struct elf_final_link_info *, const char *, | |
3378 | Elf_Internal_Sym *, asection *)); | |
3379 | static boolean elf_link_flush_output_syms | |
3380 | PARAMS ((struct elf_final_link_info *)); | |
3381 | static boolean elf_link_output_extsym | |
3382 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
3383 | static boolean elf_link_input_bfd | |
3384 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
3385 | static boolean elf_reloc_link_order | |
3386 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
3387 | struct bfd_link_order *)); | |
3388 | ||
52c92c7f | 3389 | /* This struct is used to pass information to elf_link_output_extsym. */ |
ede4eed4 | 3390 | |
52c92c7f | 3391 | struct elf_outext_info |
ede4eed4 KR |
3392 | { |
3393 | boolean failed; | |
52c92c7f | 3394 | boolean localsyms; |
ede4eed4 | 3395 | struct elf_final_link_info *finfo; |
ff12f303 | 3396 | }; |
ede4eed4 KR |
3397 | |
3398 | /* Do the final step of an ELF link. */ | |
3399 | ||
3400 | boolean | |
3401 | elf_bfd_final_link (abfd, info) | |
3402 | bfd *abfd; | |
3403 | struct bfd_link_info *info; | |
3404 | { | |
3405 | boolean dynamic; | |
3406 | bfd *dynobj; | |
3407 | struct elf_final_link_info finfo; | |
3408 | register asection *o; | |
3409 | register struct bfd_link_order *p; | |
3410 | register bfd *sub; | |
3411 | size_t max_contents_size; | |
3412 | size_t max_external_reloc_size; | |
3413 | size_t max_internal_reloc_count; | |
3414 | size_t max_sym_count; | |
3415 | file_ptr off; | |
3416 | Elf_Internal_Sym elfsym; | |
3417 | unsigned int i; | |
3418 | Elf_Internal_Shdr *symtab_hdr; | |
3419 | Elf_Internal_Shdr *symstrtab_hdr; | |
3420 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
52c92c7f | 3421 | struct elf_outext_info eoinfo; |
ede4eed4 KR |
3422 | |
3423 | if (info->shared) | |
3424 | abfd->flags |= DYNAMIC; | |
3425 | ||
3426 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
3427 | dynobj = elf_hash_table (info)->dynobj; | |
3428 | ||
3429 | finfo.info = info; | |
3430 | finfo.output_bfd = abfd; | |
3431 | finfo.symstrtab = elf_stringtab_init (); | |
3432 | if (finfo.symstrtab == NULL) | |
3433 | return false; | |
d044b40a | 3434 | |
ede4eed4 KR |
3435 | if (! dynamic) |
3436 | { | |
3437 | finfo.dynsym_sec = NULL; | |
3438 | finfo.hash_sec = NULL; | |
d044b40a | 3439 | finfo.symver_sec = NULL; |
ede4eed4 KR |
3440 | } |
3441 | else | |
3442 | { | |
3443 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3444 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
3445 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
d044b40a ILT |
3446 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); |
3447 | /* Note that it is OK if symver_sec is NULL. */ | |
ede4eed4 | 3448 | } |
d044b40a | 3449 | |
ede4eed4 KR |
3450 | finfo.contents = NULL; |
3451 | finfo.external_relocs = NULL; | |
3452 | finfo.internal_relocs = NULL; | |
3453 | finfo.external_syms = NULL; | |
3454 | finfo.internal_syms = NULL; | |
3455 | finfo.indices = NULL; | |
3456 | finfo.sections = NULL; | |
3457 | finfo.symbuf = NULL; | |
3458 | finfo.symbuf_count = 0; | |
3459 | ||
3460 | /* Count up the number of relocations we will output for each output | |
3461 | section, so that we know the sizes of the reloc sections. We | |
3462 | also figure out some maximum sizes. */ | |
3463 | max_contents_size = 0; | |
3464 | max_external_reloc_size = 0; | |
3465 | max_internal_reloc_count = 0; | |
3466 | max_sym_count = 0; | |
3467 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3468 | { | |
3469 | o->reloc_count = 0; | |
3470 | ||
3471 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3472 | { | |
3473 | if (p->type == bfd_section_reloc_link_order | |
3474 | || p->type == bfd_symbol_reloc_link_order) | |
3475 | ++o->reloc_count; | |
3476 | else if (p->type == bfd_indirect_link_order) | |
3477 | { | |
3478 | asection *sec; | |
3479 | ||
3480 | sec = p->u.indirect.section; | |
3481 | ||
7ec49f91 ILT |
3482 | /* Mark all sections which are to be included in the |
3483 | link. This will normally be every section. We need | |
3484 | to do this so that we can identify any sections which | |
3485 | the linker has decided to not include. */ | |
ff0e4a93 | 3486 | sec->linker_mark = true; |
7ec49f91 | 3487 | |
ede4eed4 KR |
3488 | if (info->relocateable) |
3489 | o->reloc_count += sec->reloc_count; | |
3490 | ||
3491 | if (sec->_raw_size > max_contents_size) | |
3492 | max_contents_size = sec->_raw_size; | |
3493 | if (sec->_cooked_size > max_contents_size) | |
3494 | max_contents_size = sec->_cooked_size; | |
3495 | ||
3496 | /* We are interested in just local symbols, not all | |
3497 | symbols. */ | |
d044b40a ILT |
3498 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
3499 | && (sec->owner->flags & DYNAMIC) == 0) | |
ede4eed4 KR |
3500 | { |
3501 | size_t sym_count; | |
3502 | ||
3503 | if (elf_bad_symtab (sec->owner)) | |
3504 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
3505 | / sizeof (Elf_External_Sym)); | |
3506 | else | |
3507 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
3508 | ||
3509 | if (sym_count > max_sym_count) | |
3510 | max_sym_count = sym_count; | |
3511 | ||
3512 | if ((sec->flags & SEC_RELOC) != 0) | |
3513 | { | |
3514 | size_t ext_size; | |
3515 | ||
3516 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
3517 | if (ext_size > max_external_reloc_size) | |
3518 | max_external_reloc_size = ext_size; | |
3519 | if (sec->reloc_count > max_internal_reloc_count) | |
3520 | max_internal_reloc_count = sec->reloc_count; | |
3521 | } | |
3522 | } | |
3523 | } | |
3524 | } | |
3525 | ||
3526 | if (o->reloc_count > 0) | |
3527 | o->flags |= SEC_RELOC; | |
3528 | else | |
3529 | { | |
3530 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
3531 | set it (this is probably a bug) and if it is set | |
3532 | assign_section_numbers will create a reloc section. */ | |
3533 | o->flags &=~ SEC_RELOC; | |
3534 | } | |
3535 | ||
3536 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
3537 | zero. This is done in elf_fake_sections as well, but forcing | |
3538 | the VMA to 0 here will ensure that relocs against these | |
3539 | sections are handled correctly. */ | |
2e0567eb ILT |
3540 | if ((o->flags & SEC_ALLOC) == 0 |
3541 | && ! o->user_set_vma) | |
ede4eed4 KR |
3542 | o->vma = 0; |
3543 | } | |
3544 | ||
3545 | /* Figure out the file positions for everything but the symbol table | |
3546 | and the relocs. We set symcount to force assign_section_numbers | |
3547 | to create a symbol table. */ | |
3548 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
3549 | BFD_ASSERT (! abfd->output_has_begun); | |
3550 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
3551 | goto error_return; | |
3552 | ||
3553 | /* That created the reloc sections. Set their sizes, and assign | |
3554 | them file positions, and allocate some buffers. */ | |
3555 | for (o = abfd->sections; o != NULL; o = o->next) | |
3556 | { | |
3557 | if ((o->flags & SEC_RELOC) != 0) | |
3558 | { | |
3559 | Elf_Internal_Shdr *rel_hdr; | |
3560 | register struct elf_link_hash_entry **p, **pend; | |
3561 | ||
3562 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3563 | ||
3564 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
3565 | ||
3566 | /* The contents field must last into write_object_contents, | |
3567 | so we allocate it with bfd_alloc rather than malloc. */ | |
3568 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
3569 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
a9713b91 | 3570 | goto error_return; |
ede4eed4 KR |
3571 | |
3572 | p = ((struct elf_link_hash_entry **) | |
58142f10 ILT |
3573 | bfd_malloc (o->reloc_count |
3574 | * sizeof (struct elf_link_hash_entry *))); | |
ede4eed4 | 3575 | if (p == NULL && o->reloc_count != 0) |
58142f10 | 3576 | goto error_return; |
ede4eed4 KR |
3577 | elf_section_data (o)->rel_hashes = p; |
3578 | pend = p + o->reloc_count; | |
3579 | for (; p < pend; p++) | |
3580 | *p = NULL; | |
3581 | ||
3582 | /* Use the reloc_count field as an index when outputting the | |
3583 | relocs. */ | |
3584 | o->reloc_count = 0; | |
3585 | } | |
3586 | } | |
3587 | ||
3588 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
3589 | ||
3590 | /* We have now assigned file positions for all the sections except | |
3591 | .symtab and .strtab. We start the .symtab section at the current | |
3592 | file position, and write directly to it. We build the .strtab | |
ab276dfa | 3593 | section in memory. */ |
ede4eed4 KR |
3594 | abfd->symcount = 0; |
3595 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3596 | /* sh_name is set in prep_headers. */ | |
3597 | symtab_hdr->sh_type = SHT_SYMTAB; | |
3598 | symtab_hdr->sh_flags = 0; | |
3599 | symtab_hdr->sh_addr = 0; | |
3600 | symtab_hdr->sh_size = 0; | |
3601 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
3602 | /* sh_link is set in assign_section_numbers. */ | |
3603 | /* sh_info is set below. */ | |
3604 | /* sh_offset is set just below. */ | |
3605 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
3606 | ||
3607 | off = elf_tdata (abfd)->next_file_pos; | |
3608 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); | |
3609 | ||
3610 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
3611 | incorrect. We do not yet know the size of the .symtab section. | |
3612 | We correct next_file_pos below, after we do know the size. */ | |
3613 | ||
3614 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
3615 | continuously seeking to the right position in the file. */ | |
3616 | if (! info->keep_memory || max_sym_count < 20) | |
3617 | finfo.symbuf_size = 20; | |
3618 | else | |
3619 | finfo.symbuf_size = max_sym_count; | |
3620 | finfo.symbuf = ((Elf_External_Sym *) | |
58142f10 | 3621 | bfd_malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); |
ede4eed4 | 3622 | if (finfo.symbuf == NULL) |
58142f10 | 3623 | goto error_return; |
ede4eed4 KR |
3624 | |
3625 | /* Start writing out the symbol table. The first symbol is always a | |
3626 | dummy symbol. */ | |
28c16b55 ILT |
3627 | if (info->strip != strip_all || info->relocateable) |
3628 | { | |
3629 | elfsym.st_value = 0; | |
3630 | elfsym.st_size = 0; | |
3631 | elfsym.st_info = 0; | |
3632 | elfsym.st_other = 0; | |
3633 | elfsym.st_shndx = SHN_UNDEF; | |
3634 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
3635 | &elfsym, bfd_und_section_ptr)) | |
3636 | goto error_return; | |
3637 | } | |
ede4eed4 KR |
3638 | |
3639 | #if 0 | |
3640 | /* Some standard ELF linkers do this, but we don't because it causes | |
3641 | bootstrap comparison failures. */ | |
3642 | /* Output a file symbol for the output file as the second symbol. | |
3643 | We output this even if we are discarding local symbols, although | |
3644 | I'm not sure if this is correct. */ | |
3645 | elfsym.st_value = 0; | |
3646 | elfsym.st_size = 0; | |
3647 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
3648 | elfsym.st_other = 0; | |
3649 | elfsym.st_shndx = SHN_ABS; | |
3650 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
3651 | &elfsym, bfd_abs_section_ptr)) | |
3652 | goto error_return; | |
3653 | #endif | |
3654 | ||
3655 | /* Output a symbol for each section. We output these even if we are | |
3656 | discarding local symbols, since they are used for relocs. These | |
3657 | symbols have no names. We store the index of each one in the | |
3658 | index field of the section, so that we can find it again when | |
3659 | outputting relocs. */ | |
28c16b55 | 3660 | if (info->strip != strip_all || info->relocateable) |
ede4eed4 | 3661 | { |
28c16b55 ILT |
3662 | elfsym.st_size = 0; |
3663 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3664 | elfsym.st_other = 0; | |
3665 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3666 | { | |
3667 | o = section_from_elf_index (abfd, i); | |
3668 | if (o != NULL) | |
3669 | o->target_index = abfd->symcount; | |
3670 | elfsym.st_shndx = i; | |
34bc6ffc ILT |
3671 | if (info->relocateable || o == NULL) |
3672 | elfsym.st_value = 0; | |
3673 | else | |
3674 | elfsym.st_value = o->vma; | |
28c16b55 ILT |
3675 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
3676 | &elfsym, o)) | |
3677 | goto error_return; | |
3678 | } | |
ede4eed4 KR |
3679 | } |
3680 | ||
3681 | /* Allocate some memory to hold information read in from the input | |
3682 | files. */ | |
58142f10 ILT |
3683 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
3684 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
ede4eed4 | 3685 | finfo.internal_relocs = ((Elf_Internal_Rela *) |
58142f10 ILT |
3686 | bfd_malloc (max_internal_reloc_count |
3687 | * sizeof (Elf_Internal_Rela))); | |
ede4eed4 | 3688 | finfo.external_syms = ((Elf_External_Sym *) |
58142f10 ILT |
3689 | bfd_malloc (max_sym_count |
3690 | * sizeof (Elf_External_Sym))); | |
ede4eed4 | 3691 | finfo.internal_syms = ((Elf_Internal_Sym *) |
58142f10 ILT |
3692 | bfd_malloc (max_sym_count |
3693 | * sizeof (Elf_Internal_Sym))); | |
3694 | finfo.indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); | |
3695 | finfo.sections = ((asection **) | |
3696 | bfd_malloc (max_sym_count * sizeof (asection *))); | |
ede4eed4 KR |
3697 | if ((finfo.contents == NULL && max_contents_size != 0) |
3698 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
3699 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
3700 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
3701 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
3702 | || (finfo.indices == NULL && max_sym_count != 0) | |
3703 | || (finfo.sections == NULL && max_sym_count != 0)) | |
58142f10 | 3704 | goto error_return; |
ede4eed4 KR |
3705 | |
3706 | /* Since ELF permits relocations to be against local symbols, we | |
3707 | must have the local symbols available when we do the relocations. | |
3708 | Since we would rather only read the local symbols once, and we | |
3709 | would rather not keep them in memory, we handle all the | |
3710 | relocations for a single input file at the same time. | |
3711 | ||
3712 | Unfortunately, there is no way to know the total number of local | |
3713 | symbols until we have seen all of them, and the local symbol | |
3714 | indices precede the global symbol indices. This means that when | |
3715 | we are generating relocateable output, and we see a reloc against | |
3716 | a global symbol, we can not know the symbol index until we have | |
3717 | finished examining all the local symbols to see which ones we are | |
3718 | going to output. To deal with this, we keep the relocations in | |
3719 | memory, and don't output them until the end of the link. This is | |
3720 | an unfortunate waste of memory, but I don't see a good way around | |
3721 | it. Fortunately, it only happens when performing a relocateable | |
3722 | link, which is not the common case. FIXME: If keep_memory is set | |
3723 | we could write the relocs out and then read them again; I don't | |
3724 | know how bad the memory loss will be. */ | |
3725 | ||
3726 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
3727 | sub->output_has_begun = false; | |
3728 | for (o = abfd->sections; o != NULL; o = o->next) | |
3729 | { | |
3730 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3731 | { | |
3732 | if (p->type == bfd_indirect_link_order | |
3733 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
3734 | == bfd_target_elf_flavour)) | |
3735 | { | |
3736 | sub = p->u.indirect.section->owner; | |
3737 | if (! sub->output_has_begun) | |
3738 | { | |
3739 | if (! elf_link_input_bfd (&finfo, sub)) | |
3740 | goto error_return; | |
3741 | sub->output_has_begun = true; | |
3742 | } | |
3743 | } | |
3744 | else if (p->type == bfd_section_reloc_link_order | |
3745 | || p->type == bfd_symbol_reloc_link_order) | |
3746 | { | |
3747 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
3748 | goto error_return; | |
3749 | } | |
3750 | else | |
3751 | { | |
3752 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3753 | goto error_return; | |
3754 | } | |
3755 | } | |
3756 | } | |
3757 | ||
3758 | /* That wrote out all the local symbols. Finish up the symbol table | |
3759 | with the global symbols. */ | |
3760 | ||
52c92c7f ILT |
3761 | if (info->strip != strip_all && info->shared) |
3762 | { | |
3763 | /* Output any global symbols that got converted to local in a | |
3764 | version script. We do this in a separate step since ELF | |
3765 | requires all local symbols to appear prior to any global | |
3766 | symbols. FIXME: We should only do this if some global | |
3767 | symbols were, in fact, converted to become local. FIXME: | |
3768 | Will this work correctly with the Irix 5 linker? */ | |
3769 | eoinfo.failed = false; | |
3770 | eoinfo.finfo = &finfo; | |
3771 | eoinfo.localsyms = true; | |
3772 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
3773 | (PTR) &eoinfo); | |
3774 | if (eoinfo.failed) | |
3775 | return false; | |
3776 | } | |
3777 | ||
ede4eed4 KR |
3778 | /* The sh_info field records the index of the first non local |
3779 | symbol. */ | |
3780 | symtab_hdr->sh_info = abfd->symcount; | |
3781 | if (dynamic) | |
3782 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
3783 | ||
3784 | /* We get the global symbols from the hash table. */ | |
52c92c7f ILT |
3785 | eoinfo.failed = false; |
3786 | eoinfo.localsyms = false; | |
3787 | eoinfo.finfo = &finfo; | |
ede4eed4 | 3788 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
52c92c7f ILT |
3789 | (PTR) &eoinfo); |
3790 | if (eoinfo.failed) | |
ede4eed4 KR |
3791 | return false; |
3792 | ||
3793 | /* Flush all symbols to the file. */ | |
3794 | if (! elf_link_flush_output_syms (&finfo)) | |
3795 | return false; | |
3796 | ||
3797 | /* Now we know the size of the symtab section. */ | |
3798 | off += symtab_hdr->sh_size; | |
3799 | ||
3800 | /* Finish up and write out the symbol string table (.strtab) | |
3801 | section. */ | |
3802 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
3803 | /* sh_name was set in prep_headers. */ | |
3804 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
3805 | symstrtab_hdr->sh_flags = 0; | |
3806 | symstrtab_hdr->sh_addr = 0; | |
3807 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
3808 | symstrtab_hdr->sh_entsize = 0; | |
3809 | symstrtab_hdr->sh_link = 0; | |
3810 | symstrtab_hdr->sh_info = 0; | |
3811 | /* sh_offset is set just below. */ | |
3812 | symstrtab_hdr->sh_addralign = 1; | |
3813 | ||
3814 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true); | |
3815 | elf_tdata (abfd)->next_file_pos = off; | |
3816 | ||
28c16b55 ILT |
3817 | if (abfd->symcount > 0) |
3818 | { | |
3819 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
3820 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
3821 | return false; | |
3822 | } | |
ede4eed4 KR |
3823 | |
3824 | /* Adjust the relocs to have the correct symbol indices. */ | |
3825 | for (o = abfd->sections; o != NULL; o = o->next) | |
3826 | { | |
3827 | struct elf_link_hash_entry **rel_hash; | |
3828 | Elf_Internal_Shdr *rel_hdr; | |
3829 | ||
3830 | if ((o->flags & SEC_RELOC) == 0) | |
3831 | continue; | |
3832 | ||
3833 | rel_hash = elf_section_data (o)->rel_hashes; | |
3834 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3835 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
3836 | { | |
3837 | if (*rel_hash == NULL) | |
3838 | continue; | |
ff12f303 | 3839 | |
ede4eed4 KR |
3840 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
3841 | ||
3842 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
3843 | { | |
3844 | Elf_External_Rel *erel; | |
3845 | Elf_Internal_Rel irel; | |
3846 | ||
3847 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
3848 | elf_swap_reloc_in (abfd, erel, &irel); | |
3849 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3850 | ELF_R_TYPE (irel.r_info)); | |
3851 | elf_swap_reloc_out (abfd, &irel, erel); | |
3852 | } | |
3853 | else | |
3854 | { | |
3855 | Elf_External_Rela *erela; | |
3856 | Elf_Internal_Rela irela; | |
3857 | ||
3858 | BFD_ASSERT (rel_hdr->sh_entsize | |
3859 | == sizeof (Elf_External_Rela)); | |
3860 | ||
3861 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
3862 | elf_swap_reloca_in (abfd, erela, &irela); | |
3863 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3864 | ELF_R_TYPE (irela.r_info)); | |
3865 | elf_swap_reloca_out (abfd, &irela, erela); | |
3866 | } | |
3867 | } | |
3868 | ||
3869 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
3870 | trying to swap the relocs out itself. */ | |
3871 | o->reloc_count = 0; | |
3872 | } | |
3873 | ||
3874 | /* If we are linking against a dynamic object, or generating a | |
3875 | shared library, finish up the dynamic linking information. */ | |
3876 | if (dynamic) | |
3877 | { | |
3878 | Elf_External_Dyn *dyncon, *dynconend; | |
3879 | ||
3880 | /* Fix up .dynamic entries. */ | |
3881 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3882 | BFD_ASSERT (o != NULL); | |
3883 | ||
3884 | dyncon = (Elf_External_Dyn *) o->contents; | |
3885 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
3886 | for (; dyncon < dynconend; dyncon++) | |
3887 | { | |
3888 | Elf_Internal_Dyn dyn; | |
3889 | const char *name; | |
3890 | unsigned int type; | |
3891 | ||
3892 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
3893 | ||
3894 | switch (dyn.d_tag) | |
3895 | { | |
3896 | default: | |
3897 | break; | |
3898 | ||
3899 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on | |
3900 | magic _init and _fini symbols. This is pretty ugly, | |
3901 | but we are compatible. */ | |
3902 | case DT_INIT: | |
3903 | name = "_init"; | |
3904 | goto get_sym; | |
3905 | case DT_FINI: | |
3906 | name = "_fini"; | |
3907 | get_sym: | |
3908 | { | |
3909 | struct elf_link_hash_entry *h; | |
3910 | ||
3911 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
3912 | false, false, true); | |
d6f672b8 ILT |
3913 | if (h != NULL |
3914 | && (h->root.type == bfd_link_hash_defined | |
3915 | || h->root.type == bfd_link_hash_defweak)) | |
ede4eed4 KR |
3916 | { |
3917 | dyn.d_un.d_val = h->root.u.def.value; | |
3918 | o = h->root.u.def.section; | |
3919 | if (o->output_section != NULL) | |
3920 | dyn.d_un.d_val += (o->output_section->vma | |
3921 | + o->output_offset); | |
3922 | else | |
d6f672b8 ILT |
3923 | { |
3924 | /* The symbol is imported from another shared | |
3925 | library and does not apply to this one. */ | |
3926 | dyn.d_un.d_val = 0; | |
3927 | } | |
3928 | ||
3929 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
ede4eed4 | 3930 | } |
ede4eed4 KR |
3931 | } |
3932 | break; | |
3933 | ||
3934 | case DT_HASH: | |
3935 | name = ".hash"; | |
3936 | goto get_vma; | |
3937 | case DT_STRTAB: | |
3938 | name = ".dynstr"; | |
3939 | goto get_vma; | |
3940 | case DT_SYMTAB: | |
3941 | name = ".dynsym"; | |
d044b40a ILT |
3942 | goto get_vma; |
3943 | case DT_VERDEF: | |
3944 | name = ".gnu.version_d"; | |
3945 | goto get_vma; | |
3946 | case DT_VERNEED: | |
3947 | name = ".gnu.version_r"; | |
3948 | goto get_vma; | |
3949 | case DT_VERSYM: | |
3950 | name = ".gnu.version"; | |
ede4eed4 KR |
3951 | get_vma: |
3952 | o = bfd_get_section_by_name (abfd, name); | |
3953 | BFD_ASSERT (o != NULL); | |
3954 | dyn.d_un.d_ptr = o->vma; | |
3955 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3956 | break; | |
3957 | ||
3958 | case DT_REL: | |
3959 | case DT_RELA: | |
3960 | case DT_RELSZ: | |
3961 | case DT_RELASZ: | |
3962 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
3963 | type = SHT_REL; | |
3964 | else | |
3965 | type = SHT_RELA; | |
3966 | dyn.d_un.d_val = 0; | |
3967 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3968 | { | |
3969 | Elf_Internal_Shdr *hdr; | |
3970 | ||
3971 | hdr = elf_elfsections (abfd)[i]; | |
3972 | if (hdr->sh_type == type | |
3973 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
3974 | { | |
3975 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
3976 | dyn.d_un.d_val += hdr->sh_size; | |
3977 | else | |
3978 | { | |
3979 | if (dyn.d_un.d_val == 0 | |
3980 | || hdr->sh_addr < dyn.d_un.d_val) | |
3981 | dyn.d_un.d_val = hdr->sh_addr; | |
3982 | } | |
3983 | } | |
3984 | } | |
3985 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3986 | break; | |
3987 | } | |
3988 | } | |
3989 | } | |
3990 | ||
3991 | /* If we have created any dynamic sections, then output them. */ | |
3992 | if (dynobj != NULL) | |
3993 | { | |
3994 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
3995 | goto error_return; | |
3996 | ||
3997 | for (o = dynobj->sections; o != NULL; o = o->next) | |
3998 | { | |
3999 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
4000 | || o->_raw_size == 0) | |
4001 | continue; | |
ff12f303 | 4002 | if ((o->flags & SEC_LINKER_CREATED) == 0) |
ede4eed4 KR |
4003 | { |
4004 | /* At this point, we are only interested in sections | |
ff12f303 | 4005 | created by elf_link_create_dynamic_sections. */ |
ede4eed4 KR |
4006 | continue; |
4007 | } | |
4008 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
4009 | != SHT_STRTAB) | |
4010 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
4011 | { | |
4012 | if (! bfd_set_section_contents (abfd, o->output_section, | |
4013 | o->contents, o->output_offset, | |
4014 | o->_raw_size)) | |
4015 | goto error_return; | |
4016 | } | |
4017 | else | |
4018 | { | |
4019 | file_ptr off; | |
4020 | ||
4021 | /* The contents of the .dynstr section are actually in a | |
4022 | stringtab. */ | |
4023 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; | |
4024 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
4025 | || ! _bfd_stringtab_emit (abfd, | |
4026 | elf_hash_table (info)->dynstr)) | |
4027 | goto error_return; | |
4028 | } | |
4029 | } | |
4030 | } | |
4031 | ||
1726b8f0 ILT |
4032 | /* If we have optimized stabs strings, output them. */ |
4033 | if (elf_hash_table (info)->stab_info != NULL) | |
4034 | { | |
4035 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
4036 | goto error_return; | |
4037 | } | |
4038 | ||
ede4eed4 KR |
4039 | if (finfo.symstrtab != NULL) |
4040 | _bfd_stringtab_free (finfo.symstrtab); | |
4041 | if (finfo.contents != NULL) | |
4042 | free (finfo.contents); | |
4043 | if (finfo.external_relocs != NULL) | |
4044 | free (finfo.external_relocs); | |
4045 | if (finfo.internal_relocs != NULL) | |
4046 | free (finfo.internal_relocs); | |
4047 | if (finfo.external_syms != NULL) | |
4048 | free (finfo.external_syms); | |
4049 | if (finfo.internal_syms != NULL) | |
4050 | free (finfo.internal_syms); | |
4051 | if (finfo.indices != NULL) | |
4052 | free (finfo.indices); | |
4053 | if (finfo.sections != NULL) | |
4054 | free (finfo.sections); | |
4055 | if (finfo.symbuf != NULL) | |
4056 | free (finfo.symbuf); | |
4057 | for (o = abfd->sections; o != NULL; o = o->next) | |
4058 | { | |
4059 | if ((o->flags & SEC_RELOC) != 0 | |
4060 | && elf_section_data (o)->rel_hashes != NULL) | |
4061 | free (elf_section_data (o)->rel_hashes); | |
4062 | } | |
4063 | ||
4064 | elf_tdata (abfd)->linker = true; | |
4065 | ||
4066 | return true; | |
4067 | ||
4068 | error_return: | |
4069 | if (finfo.symstrtab != NULL) | |
4070 | _bfd_stringtab_free (finfo.symstrtab); | |
4071 | if (finfo.contents != NULL) | |
4072 | free (finfo.contents); | |
4073 | if (finfo.external_relocs != NULL) | |
4074 | free (finfo.external_relocs); | |
4075 | if (finfo.internal_relocs != NULL) | |
4076 | free (finfo.internal_relocs); | |
4077 | if (finfo.external_syms != NULL) | |
4078 | free (finfo.external_syms); | |
4079 | if (finfo.internal_syms != NULL) | |
4080 | free (finfo.internal_syms); | |
4081 | if (finfo.indices != NULL) | |
4082 | free (finfo.indices); | |
4083 | if (finfo.sections != NULL) | |
4084 | free (finfo.sections); | |
4085 | if (finfo.symbuf != NULL) | |
4086 | free (finfo.symbuf); | |
4087 | for (o = abfd->sections; o != NULL; o = o->next) | |
4088 | { | |
4089 | if ((o->flags & SEC_RELOC) != 0 | |
4090 | && elf_section_data (o)->rel_hashes != NULL) | |
4091 | free (elf_section_data (o)->rel_hashes); | |
4092 | } | |
4093 | ||
4094 | return false; | |
4095 | } | |
4096 | ||
4097 | /* Add a symbol to the output symbol table. */ | |
4098 | ||
4099 | static boolean | |
4100 | elf_link_output_sym (finfo, name, elfsym, input_sec) | |
4101 | struct elf_final_link_info *finfo; | |
4102 | const char *name; | |
4103 | Elf_Internal_Sym *elfsym; | |
4104 | asection *input_sec; | |
4105 | { | |
4106 | boolean (*output_symbol_hook) PARAMS ((bfd *, | |
4107 | struct bfd_link_info *info, | |
4108 | const char *, | |
4109 | Elf_Internal_Sym *, | |
4110 | asection *)); | |
4111 | ||
4112 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
4113 | elf_backend_link_output_symbol_hook; | |
4114 | if (output_symbol_hook != NULL) | |
4115 | { | |
4116 | if (! ((*output_symbol_hook) | |
4117 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
4118 | return false; | |
4119 | } | |
4120 | ||
4121 | if (name == (const char *) NULL || *name == '\0') | |
4122 | elfsym->st_name = 0; | |
4123 | else | |
4124 | { | |
4125 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
4126 | name, true, | |
4127 | false); | |
4128 | if (elfsym->st_name == (unsigned long) -1) | |
4129 | return false; | |
4130 | } | |
4131 | ||
4132 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
4133 | { | |
4134 | if (! elf_link_flush_output_syms (finfo)) | |
4135 | return false; | |
4136 | } | |
4137 | ||
4138 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
cf9fb9f2 | 4139 | (PTR) (finfo->symbuf + finfo->symbuf_count)); |
ede4eed4 KR |
4140 | ++finfo->symbuf_count; |
4141 | ||
4142 | ++finfo->output_bfd->symcount; | |
4143 | ||
4144 | return true; | |
4145 | } | |
4146 | ||
4147 | /* Flush the output symbols to the file. */ | |
4148 | ||
4149 | static boolean | |
4150 | elf_link_flush_output_syms (finfo) | |
4151 | struct elf_final_link_info *finfo; | |
4152 | { | |
28c16b55 ILT |
4153 | if (finfo->symbuf_count > 0) |
4154 | { | |
4155 | Elf_Internal_Shdr *symtab; | |
ede4eed4 | 4156 | |
28c16b55 | 4157 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
ede4eed4 | 4158 | |
28c16b55 ILT |
4159 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, |
4160 | SEEK_SET) != 0 | |
4161 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
4162 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
4163 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
4164 | return false; | |
ede4eed4 | 4165 | |
28c16b55 | 4166 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); |
ede4eed4 | 4167 | |
28c16b55 ILT |
4168 | finfo->symbuf_count = 0; |
4169 | } | |
ede4eed4 KR |
4170 | |
4171 | return true; | |
4172 | } | |
4173 | ||
4174 | /* Add an external symbol to the symbol table. This is called from | |
52c92c7f ILT |
4175 | the hash table traversal routine. When generating a shared object, |
4176 | we go through the symbol table twice. The first time we output | |
4177 | anything that might have been forced to local scope in a version | |
4178 | script. The second time we output the symbols that are still | |
4179 | global symbols. */ | |
ede4eed4 KR |
4180 | |
4181 | static boolean | |
4182 | elf_link_output_extsym (h, data) | |
4183 | struct elf_link_hash_entry *h; | |
4184 | PTR data; | |
4185 | { | |
52c92c7f ILT |
4186 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
4187 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
ede4eed4 KR |
4188 | boolean strip; |
4189 | Elf_Internal_Sym sym; | |
4190 | asection *input_sec; | |
4191 | ||
52c92c7f ILT |
4192 | /* Decide whether to output this symbol in this pass. */ |
4193 | if (eoinfo->localsyms) | |
4194 | { | |
4195 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
4196 | return true; | |
4197 | } | |
4198 | else | |
4199 | { | |
4200 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
4201 | return true; | |
4202 | } | |
4203 | ||
ede4eed4 KR |
4204 | /* If we are not creating a shared library, and this symbol is |
4205 | referenced by a shared library but is not defined anywhere, then | |
4206 | warn that it is undefined. If we do not do this, the runtime | |
4207 | linker will complain that the symbol is undefined when the | |
4208 | program is run. We don't have to worry about symbols that are | |
4209 | referenced by regular files, because we will already have issued | |
252239f8 | 4210 | warnings for them. */ |
ede4eed4 KR |
4211 | if (! finfo->info->relocateable |
4212 | && ! finfo->info->shared | |
4213 | && h->root.type == bfd_link_hash_undefined | |
4214 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
252239f8 | 4215 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
ede4eed4 KR |
4216 | { |
4217 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
4218 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
4219 | (asection *) NULL, 0))) | |
4220 | { | |
52c92c7f | 4221 | eoinfo->failed = true; |
ede4eed4 KR |
4222 | return false; |
4223 | } | |
4224 | } | |
4225 | ||
4226 | /* We don't want to output symbols that have never been mentioned by | |
4227 | a regular file, or that we have been told to strip. However, if | |
4228 | h->indx is set to -2, the symbol is used by a reloc and we must | |
4229 | output it. */ | |
4230 | if (h->indx == -2) | |
4231 | strip = false; | |
4232 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4233 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
4234 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
4235 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4236 | strip = true; | |
4237 | else if (finfo->info->strip == strip_all | |
4238 | || (finfo->info->strip == strip_some | |
4239 | && bfd_hash_lookup (finfo->info->keep_hash, | |
4240 | h->root.root.string, | |
4241 | false, false) == NULL)) | |
4242 | strip = true; | |
4243 | else | |
4244 | strip = false; | |
4245 | ||
4246 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
4247 | nothing else to do. */ | |
4248 | if (strip && h->dynindx == -1) | |
4249 | return true; | |
4250 | ||
4251 | sym.st_value = 0; | |
4252 | sym.st_size = h->size; | |
6c02f1a0 | 4253 | sym.st_other = h->other; |
52c92c7f ILT |
4254 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) |
4255 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
4256 | else if (h->root.type == bfd_link_hash_undefweak | |
4257 | || h->root.type == bfd_link_hash_defweak) | |
ede4eed4 KR |
4258 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); |
4259 | else | |
4260 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
4261 | ||
4262 | switch (h->root.type) | |
4263 | { | |
4264 | default: | |
4265 | case bfd_link_hash_new: | |
4266 | abort (); | |
4267 | return false; | |
4268 | ||
4269 | case bfd_link_hash_undefined: | |
4270 | input_sec = bfd_und_section_ptr; | |
4271 | sym.st_shndx = SHN_UNDEF; | |
4272 | break; | |
4273 | ||
4274 | case bfd_link_hash_undefweak: | |
4275 | input_sec = bfd_und_section_ptr; | |
4276 | sym.st_shndx = SHN_UNDEF; | |
4277 | break; | |
4278 | ||
4279 | case bfd_link_hash_defined: | |
4280 | case bfd_link_hash_defweak: | |
4281 | { | |
4282 | input_sec = h->root.u.def.section; | |
4283 | if (input_sec->output_section != NULL) | |
4284 | { | |
4285 | sym.st_shndx = | |
4286 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
4287 | input_sec->output_section); | |
4288 | if (sym.st_shndx == (unsigned short) -1) | |
4289 | { | |
52c92c7f | 4290 | eoinfo->failed = true; |
ede4eed4 KR |
4291 | return false; |
4292 | } | |
4293 | ||
4294 | /* ELF symbols in relocateable files are section relative, | |
4295 | but in nonrelocateable files they are virtual | |
4296 | addresses. */ | |
4297 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
4298 | if (! finfo->info->relocateable) | |
4299 | sym.st_value += input_sec->output_section->vma; | |
4300 | } | |
4301 | else | |
4302 | { | |
e549b1d2 ILT |
4303 | BFD_ASSERT (input_sec->owner == NULL |
4304 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
ede4eed4 KR |
4305 | sym.st_shndx = SHN_UNDEF; |
4306 | input_sec = bfd_und_section_ptr; | |
4307 | } | |
4308 | } | |
4309 | break; | |
4310 | ||
4311 | case bfd_link_hash_common: | |
8211c929 | 4312 | input_sec = h->root.u.c.p->section; |
ede4eed4 KR |
4313 | sym.st_shndx = SHN_COMMON; |
4314 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
4315 | break; | |
4316 | ||
4317 | case bfd_link_hash_indirect: | |
d044b40a ILT |
4318 | /* These symbols are created by symbol versioning. They point |
4319 | to the decorated version of the name. For example, if the | |
4320 | symbol foo@@GNU_1.2 is the default, which should be used when | |
4321 | foo is used with no version, then we add an indirect symbol | |
d6bfcdb5 ILT |
4322 | foo which points to foo@@GNU_1.2. We ignore these symbols, |
4323 | since the indirected symbol is already in the hash table. If | |
4324 | the indirect symbol is non-ELF, fall through and output it. */ | |
4325 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) == 0) | |
d044b40a ILT |
4326 | return true; |
4327 | ||
4328 | /* Fall through. */ | |
ede4eed4 | 4329 | case bfd_link_hash_warning: |
d044b40a ILT |
4330 | /* We can't represent these symbols in ELF, although a warning |
4331 | symbol may have come from a .gnu.warning.SYMBOL section. We | |
1f4ae0d6 ILT |
4332 | just put the target symbol in the hash table. If the target |
4333 | symbol does not really exist, don't do anything. */ | |
4334 | if (h->root.u.i.link->type == bfd_link_hash_new) | |
4335 | return true; | |
0cb70568 ILT |
4336 | return (elf_link_output_extsym |
4337 | ((struct elf_link_hash_entry *) h->root.u.i.link, data)); | |
ede4eed4 KR |
4338 | } |
4339 | ||
8519ea21 ILT |
4340 | /* Give the processor backend a chance to tweak the symbol value, |
4341 | and also to finish up anything that needs to be done for this | |
4342 | symbol. */ | |
4343 | if ((h->dynindx != -1 | |
4344 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
4345 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
4346 | { | |
4347 | struct elf_backend_data *bed; | |
4348 | ||
4349 | bed = get_elf_backend_data (finfo->output_bfd); | |
4350 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
4351 | (finfo->output_bfd, finfo->info, h, &sym))) | |
4352 | { | |
4353 | eoinfo->failed = true; | |
4354 | return false; | |
4355 | } | |
4356 | } | |
4357 | ||
ede4eed4 KR |
4358 | /* If this symbol should be put in the .dynsym section, then put it |
4359 | there now. We have already know the symbol index. We also fill | |
4360 | in the entry in the .hash section. */ | |
4361 | if (h->dynindx != -1 | |
4362 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
4363 | { | |
d044b40a ILT |
4364 | char *p, *copy; |
4365 | const char *name; | |
ede4eed4 KR |
4366 | size_t bucketcount; |
4367 | size_t bucket; | |
4368 | bfd_byte *bucketpos; | |
4369 | bfd_vma chain; | |
4370 | ||
4371 | sym.st_name = h->dynstr_index; | |
4372 | ||
ede4eed4 | 4373 | elf_swap_symbol_out (finfo->output_bfd, &sym, |
cf9fb9f2 ILT |
4374 | (PTR) (((Elf_External_Sym *) |
4375 | finfo->dynsym_sec->contents) | |
4376 | + h->dynindx)); | |
ede4eed4 | 4377 | |
d044b40a ILT |
4378 | /* We didn't include the version string in the dynamic string |
4379 | table, so we must not consider it in the hash table. */ | |
4380 | name = h->root.root.string; | |
4381 | p = strchr (name, ELF_VER_CHR); | |
4382 | if (p == NULL) | |
4383 | copy = NULL; | |
4384 | else | |
4385 | { | |
4386 | copy = bfd_alloc (finfo->output_bfd, p - name + 1); | |
4387 | strncpy (copy, name, p - name); | |
4388 | copy[p - name] = '\0'; | |
4389 | name = copy; | |
4390 | } | |
4391 | ||
ede4eed4 | 4392 | bucketcount = elf_hash_table (finfo->info)->bucketcount; |
d044b40a | 4393 | bucket = bfd_elf_hash ((const unsigned char *) name) % bucketcount; |
ede4eed4 KR |
4394 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
4395 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
4396 | chain = get_word (finfo->output_bfd, bucketpos); | |
4397 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
4398 | put_word (finfo->output_bfd, chain, | |
4399 | ((bfd_byte *) finfo->hash_sec->contents | |
4400 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
d044b40a ILT |
4401 | |
4402 | if (copy != NULL) | |
4403 | bfd_release (finfo->output_bfd, copy); | |
4404 | ||
4405 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
4406 | { | |
4407 | Elf_Internal_Versym iversym; | |
4408 | ||
4409 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4410 | { | |
4411 | if (h->verinfo.verdef == NULL) | |
4412 | iversym.vs_vers = 0; | |
4413 | else | |
4414 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
4415 | } | |
4416 | else | |
4417 | { | |
4418 | if (h->verinfo.vertree == NULL) | |
4419 | iversym.vs_vers = 1; | |
4420 | else | |
4421 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
4422 | } | |
4423 | ||
4424 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
4425 | iversym.vs_vers |= VERSYM_HIDDEN; | |
4426 | ||
4427 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, | |
4428 | (((Elf_External_Versym *) | |
4429 | finfo->symver_sec->contents) | |
4430 | + h->dynindx)); | |
4431 | } | |
ede4eed4 KR |
4432 | } |
4433 | ||
4434 | /* If we're stripping it, then it was just a dynamic symbol, and | |
4435 | there's nothing else to do. */ | |
4436 | if (strip) | |
4437 | return true; | |
4438 | ||
4439 | h->indx = finfo->output_bfd->symcount; | |
4440 | ||
4441 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
4442 | { | |
52c92c7f | 4443 | eoinfo->failed = true; |
ede4eed4 KR |
4444 | return false; |
4445 | } | |
4446 | ||
4447 | return true; | |
4448 | } | |
4449 | ||
4450 | /* Link an input file into the linker output file. This function | |
4451 | handles all the sections and relocations of the input file at once. | |
4452 | This is so that we only have to read the local symbols once, and | |
4453 | don't have to keep them in memory. */ | |
4454 | ||
4455 | static boolean | |
4456 | elf_link_input_bfd (finfo, input_bfd) | |
4457 | struct elf_final_link_info *finfo; | |
4458 | bfd *input_bfd; | |
4459 | { | |
4460 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
4461 | bfd *, asection *, bfd_byte *, | |
4462 | Elf_Internal_Rela *, | |
4463 | Elf_Internal_Sym *, asection **)); | |
4464 | bfd *output_bfd; | |
4465 | Elf_Internal_Shdr *symtab_hdr; | |
4466 | size_t locsymcount; | |
4467 | size_t extsymoff; | |
c86158e5 | 4468 | Elf_External_Sym *external_syms; |
ede4eed4 KR |
4469 | Elf_External_Sym *esym; |
4470 | Elf_External_Sym *esymend; | |
4471 | Elf_Internal_Sym *isym; | |
4472 | long *pindex; | |
4473 | asection **ppsection; | |
4474 | asection *o; | |
4475 | ||
4476 | output_bfd = finfo->output_bfd; | |
4477 | relocate_section = | |
4478 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
4479 | ||
4480 | /* If this is a dynamic object, we don't want to do anything here: | |
4481 | we don't want the local symbols, and we don't want the section | |
4482 | contents. */ | |
d044b40a | 4483 | if ((input_bfd->flags & DYNAMIC) != 0) |
ede4eed4 KR |
4484 | return true; |
4485 | ||
4486 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4487 | if (elf_bad_symtab (input_bfd)) | |
4488 | { | |
4489 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
4490 | extsymoff = 0; | |
4491 | } | |
4492 | else | |
4493 | { | |
4494 | locsymcount = symtab_hdr->sh_info; | |
4495 | extsymoff = symtab_hdr->sh_info; | |
4496 | } | |
4497 | ||
4498 | /* Read the local symbols. */ | |
c86158e5 ILT |
4499 | if (symtab_hdr->contents != NULL) |
4500 | external_syms = (Elf_External_Sym *) symtab_hdr->contents; | |
4501 | else if (locsymcount == 0) | |
4502 | external_syms = NULL; | |
4503 | else | |
4504 | { | |
4505 | external_syms = finfo->external_syms; | |
4506 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
4507 | || (bfd_read (external_syms, sizeof (Elf_External_Sym), | |
ede4eed4 | 4508 | locsymcount, input_bfd) |
c86158e5 ILT |
4509 | != locsymcount * sizeof (Elf_External_Sym))) |
4510 | return false; | |
4511 | } | |
ede4eed4 KR |
4512 | |
4513 | /* Swap in the local symbols and write out the ones which we know | |
4514 | are going into the output file. */ | |
c86158e5 | 4515 | esym = external_syms; |
ede4eed4 KR |
4516 | esymend = esym + locsymcount; |
4517 | isym = finfo->internal_syms; | |
4518 | pindex = finfo->indices; | |
4519 | ppsection = finfo->sections; | |
4520 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
4521 | { | |
4522 | asection *isec; | |
4523 | const char *name; | |
4524 | Elf_Internal_Sym osym; | |
4525 | ||
4526 | elf_swap_symbol_in (input_bfd, esym, isym); | |
4527 | *pindex = -1; | |
4528 | ||
4529 | if (elf_bad_symtab (input_bfd)) | |
4530 | { | |
4531 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
4532 | { | |
4533 | *ppsection = NULL; | |
4534 | continue; | |
4535 | } | |
4536 | } | |
4537 | ||
4538 | if (isym->st_shndx == SHN_UNDEF) | |
4539 | isec = bfd_und_section_ptr; | |
4540 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) | |
4541 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
4542 | else if (isym->st_shndx == SHN_ABS) | |
4543 | isec = bfd_abs_section_ptr; | |
4544 | else if (isym->st_shndx == SHN_COMMON) | |
4545 | isec = bfd_com_section_ptr; | |
4546 | else | |
4547 | { | |
4548 | /* Who knows? */ | |
4549 | isec = NULL; | |
4550 | } | |
4551 | ||
4552 | *ppsection = isec; | |
4553 | ||
4554 | /* Don't output the first, undefined, symbol. */ | |
c86158e5 | 4555 | if (esym == external_syms) |
ede4eed4 KR |
4556 | continue; |
4557 | ||
4558 | /* If we are stripping all symbols, we don't want to output this | |
4559 | one. */ | |
4560 | if (finfo->info->strip == strip_all) | |
4561 | continue; | |
4562 | ||
4563 | /* We never output section symbols. Instead, we use the section | |
4564 | symbol of the corresponding section in the output file. */ | |
4565 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4566 | continue; | |
4567 | ||
4568 | /* If we are discarding all local symbols, we don't want to | |
4569 | output this one. If we are generating a relocateable output | |
4570 | file, then some of the local symbols may be required by | |
4571 | relocs; we output them below as we discover that they are | |
4572 | needed. */ | |
4573 | if (finfo->info->discard == discard_all) | |
4574 | continue; | |
4575 | ||
258b1f5d | 4576 | /* If this symbol is defined in a section which we are |
fa802cb0 ILT |
4577 | discarding, we don't need to keep it, but note that |
4578 | linker_mark is only reliable for sections that have contents. | |
4579 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
4580 | as well as linker_mark. */ | |
258b1f5d ILT |
4581 | if (isym->st_shndx > 0 |
4582 | && isym->st_shndx < SHN_LORESERVE | |
4583 | && isec != NULL | |
fa802cb0 | 4584 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) |
258b1f5d ILT |
4585 | || (! finfo->info->relocateable |
4586 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
4587 | continue; | |
4588 | ||
ede4eed4 KR |
4589 | /* Get the name of the symbol. */ |
4590 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
258b1f5d | 4591 | isym->st_name); |
ede4eed4 KR |
4592 | if (name == NULL) |
4593 | return false; | |
4594 | ||
4595 | /* See if we are discarding symbols with this name. */ | |
4596 | if ((finfo->info->strip == strip_some | |
4597 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
4598 | == NULL)) | |
4599 | || (finfo->info->discard == discard_l | |
e316f514 | 4600 | && bfd_is_local_label_name (input_bfd, name))) |
ede4eed4 KR |
4601 | continue; |
4602 | ||
4603 | /* If we get here, we are going to output this symbol. */ | |
4604 | ||
4605 | osym = *isym; | |
4606 | ||
4607 | /* Adjust the section index for the output file. */ | |
4608 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
4609 | isec->output_section); | |
4610 | if (osym.st_shndx == (unsigned short) -1) | |
4611 | return false; | |
4612 | ||
4613 | *pindex = output_bfd->symcount; | |
4614 | ||
4615 | /* ELF symbols in relocateable files are section relative, but | |
4616 | in executable files they are virtual addresses. Note that | |
4617 | this code assumes that all ELF sections have an associated | |
4618 | BFD section with a reasonable value for output_offset; below | |
4619 | we assume that they also have a reasonable value for | |
4620 | output_section. Any special sections must be set up to meet | |
4621 | these requirements. */ | |
4622 | osym.st_value += isec->output_offset; | |
4623 | if (! finfo->info->relocateable) | |
4624 | osym.st_value += isec->output_section->vma; | |
4625 | ||
4626 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
4627 | return false; | |
4628 | } | |
4629 | ||
4630 | /* Relocate the contents of each section. */ | |
4631 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
4632 | { | |
c86158e5 ILT |
4633 | bfd_byte *contents; |
4634 | ||
ff0e4a93 | 4635 | if (! o->linker_mark) |
7ec49f91 ILT |
4636 | { |
4637 | /* This section was omitted from the link. */ | |
4638 | continue; | |
4639 | } | |
4640 | ||
1726b8f0 ILT |
4641 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
4642 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
ede4eed4 KR |
4643 | continue; |
4644 | ||
ff12f303 | 4645 | if ((o->flags & SEC_LINKER_CREATED) != 0) |
ede4eed4 | 4646 | { |
ff12f303 ILT |
4647 | /* Section was created by elf_link_create_dynamic_sections |
4648 | or somesuch. */ | |
ede4eed4 KR |
4649 | continue; |
4650 | } | |
4651 | ||
c86158e5 ILT |
4652 | /* Get the contents of the section. They have been cached by a |
4653 | relaxation routine. Note that o is a section in an input | |
4654 | file, so the contents field will not have been set by any of | |
4655 | the routines which work on output files. */ | |
4656 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
4657 | contents = elf_section_data (o)->this_hdr.contents; | |
4658 | else | |
4659 | { | |
4660 | contents = finfo->contents; | |
4661 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
4662 | (file_ptr) 0, o->_raw_size)) | |
4663 | return false; | |
4664 | } | |
ede4eed4 KR |
4665 | |
4666 | if ((o->flags & SEC_RELOC) != 0) | |
4667 | { | |
4668 | Elf_Internal_Rela *internal_relocs; | |
4669 | ||
4670 | /* Get the swapped relocs. */ | |
c86158e5 ILT |
4671 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
4672 | (input_bfd, o, finfo->external_relocs, | |
4673 | finfo->internal_relocs, false)); | |
ede4eed4 KR |
4674 | if (internal_relocs == NULL |
4675 | && o->reloc_count > 0) | |
4676 | return false; | |
4677 | ||
4678 | /* Relocate the section by invoking a back end routine. | |
4679 | ||
4680 | The back end routine is responsible for adjusting the | |
4681 | section contents as necessary, and (if using Rela relocs | |
4682 | and generating a relocateable output file) adjusting the | |
4683 | reloc addend as necessary. | |
4684 | ||
4685 | The back end routine does not have to worry about setting | |
4686 | the reloc address or the reloc symbol index. | |
4687 | ||
4688 | The back end routine is given a pointer to the swapped in | |
4689 | internal symbols, and can access the hash table entries | |
4690 | for the external symbols via elf_sym_hashes (input_bfd). | |
4691 | ||
4692 | When generating relocateable output, the back end routine | |
4693 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
4694 | output symbol is going to be a section symbol | |
4695 | corresponding to the output section, which will require | |
4696 | the addend to be adjusted. */ | |
4697 | ||
4698 | if (! (*relocate_section) (output_bfd, finfo->info, | |
c86158e5 | 4699 | input_bfd, o, contents, |
ede4eed4 KR |
4700 | internal_relocs, |
4701 | finfo->internal_syms, | |
4702 | finfo->sections)) | |
4703 | return false; | |
4704 | ||
4705 | if (finfo->info->relocateable) | |
4706 | { | |
4707 | Elf_Internal_Rela *irela; | |
4708 | Elf_Internal_Rela *irelaend; | |
4709 | struct elf_link_hash_entry **rel_hash; | |
4710 | Elf_Internal_Shdr *input_rel_hdr; | |
4711 | Elf_Internal_Shdr *output_rel_hdr; | |
4712 | ||
4713 | /* Adjust the reloc addresses and symbol indices. */ | |
4714 | ||
4715 | irela = internal_relocs; | |
4716 | irelaend = irela + o->reloc_count; | |
4717 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
4718 | + o->output_section->reloc_count); | |
4719 | for (; irela < irelaend; irela++, rel_hash++) | |
4720 | { | |
ae115e51 | 4721 | unsigned long r_symndx; |
ede4eed4 KR |
4722 | Elf_Internal_Sym *isym; |
4723 | asection *sec; | |
4724 | ||
4725 | irela->r_offset += o->output_offset; | |
4726 | ||
4727 | r_symndx = ELF_R_SYM (irela->r_info); | |
4728 | ||
4729 | if (r_symndx == 0) | |
4730 | continue; | |
4731 | ||
4732 | if (r_symndx >= locsymcount | |
4733 | || (elf_bad_symtab (input_bfd) | |
4734 | && finfo->sections[r_symndx] == NULL)) | |
4735 | { | |
5ee8d932 | 4736 | struct elf_link_hash_entry *rh; |
ede4eed4 KR |
4737 | long indx; |
4738 | ||
4739 | /* This is a reloc against a global symbol. We | |
4740 | have not yet output all the local symbols, so | |
4741 | we do not know the symbol index of any global | |
4742 | symbol. We set the rel_hash entry for this | |
4743 | reloc to point to the global hash table entry | |
4744 | for this symbol. The symbol index is then | |
4745 | set at the end of elf_bfd_final_link. */ | |
4746 | indx = r_symndx - extsymoff; | |
5ee8d932 ILT |
4747 | rh = elf_sym_hashes (input_bfd)[indx]; |
4748 | while (rh->root.type == bfd_link_hash_indirect | |
4749 | || rh->root.type == bfd_link_hash_warning) | |
4750 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
ede4eed4 KR |
4751 | |
4752 | /* Setting the index to -2 tells | |
4753 | elf_link_output_extsym that this symbol is | |
4754 | used by a reloc. */ | |
5ee8d932 ILT |
4755 | BFD_ASSERT (rh->indx < 0); |
4756 | rh->indx = -2; | |
4757 | ||
4758 | *rel_hash = rh; | |
ede4eed4 KR |
4759 | |
4760 | continue; | |
4761 | } | |
4762 | ||
4763 | /* This is a reloc against a local symbol. */ | |
4764 | ||
4765 | *rel_hash = NULL; | |
4766 | isym = finfo->internal_syms + r_symndx; | |
4767 | sec = finfo->sections[r_symndx]; | |
4768 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4769 | { | |
4770 | /* I suppose the backend ought to fill in the | |
4771 | section of any STT_SECTION symbol against a | |
ba4a4594 ILT |
4772 | processor specific section. If we have |
4773 | discarded a section, the output_section will | |
4774 | be the absolute section. */ | |
4775 | if (sec != NULL | |
4776 | && (bfd_is_abs_section (sec) | |
4777 | || (sec->output_section != NULL | |
4778 | && bfd_is_abs_section (sec->output_section)))) | |
ede4eed4 KR |
4779 | r_symndx = 0; |
4780 | else if (sec == NULL || sec->owner == NULL) | |
4781 | { | |
4782 | bfd_set_error (bfd_error_bad_value); | |
4783 | return false; | |
4784 | } | |
4785 | else | |
4786 | { | |
4787 | r_symndx = sec->output_section->target_index; | |
4788 | BFD_ASSERT (r_symndx != 0); | |
4789 | } | |
4790 | } | |
4791 | else | |
4792 | { | |
4793 | if (finfo->indices[r_symndx] == -1) | |
4794 | { | |
4795 | unsigned long link; | |
4796 | const char *name; | |
4797 | asection *osec; | |
4798 | ||
4799 | if (finfo->info->strip == strip_all) | |
4800 | { | |
4801 | /* You can't do ld -r -s. */ | |
4802 | bfd_set_error (bfd_error_invalid_operation); | |
4803 | return false; | |
4804 | } | |
4805 | ||
4806 | /* This symbol was skipped earlier, but | |
4807 | since it is needed by a reloc, we | |
4808 | must output it now. */ | |
4809 | link = symtab_hdr->sh_link; | |
4810 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4811 | link, | |
4812 | isym->st_name); | |
4813 | if (name == NULL) | |
4814 | return false; | |
4815 | ||
4816 | osec = sec->output_section; | |
4817 | isym->st_shndx = | |
4818 | _bfd_elf_section_from_bfd_section (output_bfd, | |
4819 | osec); | |
4820 | if (isym->st_shndx == (unsigned short) -1) | |
4821 | return false; | |
4822 | ||
4823 | isym->st_value += sec->output_offset; | |
4824 | if (! finfo->info->relocateable) | |
4825 | isym->st_value += osec->vma; | |
4826 | ||
4827 | finfo->indices[r_symndx] = output_bfd->symcount; | |
4828 | ||
4829 | if (! elf_link_output_sym (finfo, name, isym, sec)) | |
4830 | return false; | |
4831 | } | |
4832 | ||
4833 | r_symndx = finfo->indices[r_symndx]; | |
4834 | } | |
4835 | ||
4836 | irela->r_info = ELF_R_INFO (r_symndx, | |
4837 | ELF_R_TYPE (irela->r_info)); | |
4838 | } | |
4839 | ||
4840 | /* Swap out the relocs. */ | |
4841 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
4842 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
4843 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
4844 | == input_rel_hdr->sh_entsize); | |
4845 | irela = internal_relocs; | |
4846 | irelaend = irela + o->reloc_count; | |
4847 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
4848 | { | |
4849 | Elf_External_Rel *erel; | |
4850 | ||
4851 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
4852 | + o->output_section->reloc_count); | |
4853 | for (; irela < irelaend; irela++, erel++) | |
4854 | { | |
4855 | Elf_Internal_Rel irel; | |
4856 | ||
4857 | irel.r_offset = irela->r_offset; | |
4858 | irel.r_info = irela->r_info; | |
4859 | BFD_ASSERT (irela->r_addend == 0); | |
4860 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
4861 | } | |
4862 | } | |
4863 | else | |
4864 | { | |
4865 | Elf_External_Rela *erela; | |
4866 | ||
4867 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
4868 | == sizeof (Elf_External_Rela)); | |
4869 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
4870 | + o->output_section->reloc_count); | |
4871 | for (; irela < irelaend; irela++, erela++) | |
4872 | elf_swap_reloca_out (output_bfd, irela, erela); | |
4873 | } | |
4874 | ||
4875 | o->output_section->reloc_count += o->reloc_count; | |
4876 | } | |
4877 | } | |
4878 | ||
4879 | /* Write out the modified section contents. */ | |
1726b8f0 ILT |
4880 | if (elf_section_data (o)->stab_info == NULL) |
4881 | { | |
4882 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
c86158e5 | 4883 | contents, o->output_offset, |
1726b8f0 ILT |
4884 | (o->_cooked_size != 0 |
4885 | ? o->_cooked_size | |
4886 | : o->_raw_size))) | |
4887 | return false; | |
4888 | } | |
4889 | else | |
4890 | { | |
3cd5cf3d ILT |
4891 | if (! (_bfd_write_section_stabs |
4892 | (output_bfd, &elf_hash_table (finfo->info)->stab_info, | |
4893 | o, &elf_section_data (o)->stab_info, contents))) | |
1726b8f0 ILT |
4894 | return false; |
4895 | } | |
ede4eed4 KR |
4896 | } |
4897 | ||
4898 | return true; | |
4899 | } | |
4900 | ||
4901 | /* Generate a reloc when linking an ELF file. This is a reloc | |
4902 | requested by the linker, and does come from any input file. This | |
4903 | is used to build constructor and destructor tables when linking | |
4904 | with -Ur. */ | |
4905 | ||
4906 | static boolean | |
4907 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
4908 | bfd *output_bfd; | |
4909 | struct bfd_link_info *info; | |
4910 | asection *output_section; | |
4911 | struct bfd_link_order *link_order; | |
4912 | { | |
4913 | reloc_howto_type *howto; | |
4914 | long indx; | |
4915 | bfd_vma offset; | |
5b3b9ff6 | 4916 | bfd_vma addend; |
ede4eed4 KR |
4917 | struct elf_link_hash_entry **rel_hash_ptr; |
4918 | Elf_Internal_Shdr *rel_hdr; | |
4919 | ||
4920 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
4921 | if (howto == NULL) | |
4922 | { | |
4923 | bfd_set_error (bfd_error_bad_value); | |
4924 | return false; | |
4925 | } | |
4926 | ||
5b3b9ff6 ILT |
4927 | addend = link_order->u.reloc.p->addend; |
4928 | ||
4929 | /* Figure out the symbol index. */ | |
4930 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
4931 | + output_section->reloc_count); | |
4932 | if (link_order->type == bfd_section_reloc_link_order) | |
4933 | { | |
4934 | indx = link_order->u.reloc.p->u.section->target_index; | |
4935 | BFD_ASSERT (indx != 0); | |
4936 | *rel_hash_ptr = NULL; | |
4937 | } | |
4938 | else | |
4939 | { | |
4940 | struct elf_link_hash_entry *h; | |
4941 | ||
4942 | /* Treat a reloc against a defined symbol as though it were | |
4943 | actually against the section. */ | |
8881b321 ILT |
4944 | h = ((struct elf_link_hash_entry *) |
4945 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
4946 | link_order->u.reloc.p->u.name, | |
4947 | false, false, true)); | |
5b3b9ff6 ILT |
4948 | if (h != NULL |
4949 | && (h->root.type == bfd_link_hash_defined | |
4950 | || h->root.type == bfd_link_hash_defweak)) | |
4951 | { | |
4952 | asection *section; | |
4953 | ||
4954 | section = h->root.u.def.section; | |
4955 | indx = section->output_section->target_index; | |
4956 | *rel_hash_ptr = NULL; | |
4957 | /* It seems that we ought to add the symbol value to the | |
4958 | addend here, but in practice it has already been added | |
4959 | because it was passed to constructor_callback. */ | |
4960 | addend += section->output_section->vma + section->output_offset; | |
4961 | } | |
4962 | else if (h != NULL) | |
4963 | { | |
4964 | /* Setting the index to -2 tells elf_link_output_extsym that | |
4965 | this symbol is used by a reloc. */ | |
4966 | h->indx = -2; | |
4967 | *rel_hash_ptr = h; | |
4968 | indx = 0; | |
4969 | } | |
4970 | else | |
4971 | { | |
4972 | if (! ((*info->callbacks->unattached_reloc) | |
4973 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
4974 | (asection *) NULL, (bfd_vma) 0))) | |
4975 | return false; | |
4976 | indx = 0; | |
4977 | } | |
4978 | } | |
4979 | ||
ede4eed4 KR |
4980 | /* If this is an inplace reloc, we must write the addend into the |
4981 | object file. */ | |
5b3b9ff6 | 4982 | if (howto->partial_inplace && addend != 0) |
ede4eed4 KR |
4983 | { |
4984 | bfd_size_type size; | |
4985 | bfd_reloc_status_type rstat; | |
4986 | bfd_byte *buf; | |
4987 | boolean ok; | |
4988 | ||
4989 | size = bfd_get_reloc_size (howto); | |
4990 | buf = (bfd_byte *) bfd_zmalloc (size); | |
4991 | if (buf == (bfd_byte *) NULL) | |
a9713b91 | 4992 | return false; |
5b3b9ff6 | 4993 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
ede4eed4 KR |
4994 | switch (rstat) |
4995 | { | |
4996 | case bfd_reloc_ok: | |
4997 | break; | |
4998 | default: | |
4999 | case bfd_reloc_outofrange: | |
5000 | abort (); | |
5001 | case bfd_reloc_overflow: | |
5002 | if (! ((*info->callbacks->reloc_overflow) | |
5003 | (info, | |
5004 | (link_order->type == bfd_section_reloc_link_order | |
5005 | ? bfd_section_name (output_bfd, | |
5006 | link_order->u.reloc.p->u.section) | |
5007 | : link_order->u.reloc.p->u.name), | |
5b3b9ff6 ILT |
5008 | howto->name, addend, (bfd *) NULL, (asection *) NULL, |
5009 | (bfd_vma) 0))) | |
ede4eed4 KR |
5010 | { |
5011 | free (buf); | |
5012 | return false; | |
5013 | } | |
5014 | break; | |
5015 | } | |
5016 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
5017 | (file_ptr) link_order->offset, size); | |
5018 | free (buf); | |
5019 | if (! ok) | |
5020 | return false; | |
5021 | } | |
5022 | ||
ede4eed4 KR |
5023 | /* The address of a reloc is relative to the section in a |
5024 | relocateable file, and is a virtual address in an executable | |
5025 | file. */ | |
5026 | offset = link_order->offset; | |
5027 | if (! info->relocateable) | |
5028 | offset += output_section->vma; | |
5029 | ||
5030 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
5031 | ||
5032 | if (rel_hdr->sh_type == SHT_REL) | |
5033 | { | |
5034 | Elf_Internal_Rel irel; | |
5035 | Elf_External_Rel *erel; | |
5036 | ||
5037 | irel.r_offset = offset; | |
5038 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
5039 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
5040 | + output_section->reloc_count); | |
5041 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
5042 | } | |
5043 | else | |
5044 | { | |
5045 | Elf_Internal_Rela irela; | |
5046 | Elf_External_Rela *erela; | |
5047 | ||
5048 | irela.r_offset = offset; | |
5049 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
5b3b9ff6 | 5050 | irela.r_addend = addend; |
ede4eed4 KR |
5051 | erela = ((Elf_External_Rela *) rel_hdr->contents |
5052 | + output_section->reloc_count); | |
5053 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
5054 | } | |
5055 | ||
5056 | ++output_section->reloc_count; | |
5057 | ||
5058 | return true; | |
5059 | } | |
5060 | ||
3b3753b8 MM |
5061 | \f |
5062 | /* Allocate a pointer to live in a linker created section. */ | |
5063 | ||
5064 | boolean | |
5065 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) | |
5066 | bfd *abfd; | |
5067 | struct bfd_link_info *info; | |
5068 | elf_linker_section_t *lsect; | |
5069 | struct elf_link_hash_entry *h; | |
5070 | const Elf_Internal_Rela *rel; | |
5071 | { | |
5072 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
5073 | elf_linker_section_pointers_t *linker_section_ptr; | |
5074 | unsigned long r_symndx = ELF_R_SYM (rel->r_info);; | |
5075 | ||
5076 | BFD_ASSERT (lsect != NULL); | |
5077 | ||
5078 | /* Is this a global symbol? */ | |
5079 | if (h != NULL) | |
5080 | { | |
5081 | /* Has this symbol already been allocated, if so, our work is done */ | |
5082 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
5083 | rel->r_addend, | |
5084 | lsect->which)) | |
5085 | return true; | |
5086 | ||
5087 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
5088 | /* Make sure this symbol is output as a dynamic symbol. */ | |
5089 | if (h->dynindx == -1) | |
5090 | { | |
5091 | if (! elf_link_record_dynamic_symbol (info, h)) | |
5092 | return false; | |
5093 | } | |
5094 | ||
eb82bc60 MM |
5095 | if (lsect->rel_section) |
5096 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
3b3753b8 MM |
5097 | } |
5098 | ||
5099 | else /* Allocation of a pointer to a local symbol */ | |
5100 | { | |
5101 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); | |
5102 | ||
5103 | /* Allocate a table to hold the local symbols if first time */ | |
5104 | if (!ptr) | |
5105 | { | |
f6727b90 | 5106 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; |
3b3753b8 MM |
5107 | register unsigned int i; |
5108 | ||
5109 | ptr = (elf_linker_section_pointers_t **) | |
5110 | bfd_alloc (abfd, num_symbols * sizeof (elf_linker_section_pointers_t *)); | |
5111 | ||
5112 | if (!ptr) | |
5113 | return false; | |
5114 | ||
5115 | elf_local_ptr_offsets (abfd) = ptr; | |
5116 | for (i = 0; i < num_symbols; i++) | |
5117 | ptr[i] = (elf_linker_section_pointers_t *)0; | |
5118 | } | |
5119 | ||
5120 | /* Has this symbol already been allocated, if so, our work is done */ | |
5121 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], | |
5122 | rel->r_addend, | |
5123 | lsect->which)) | |
5124 | return true; | |
5125 | ||
5126 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
5127 | ||
5128 | if (info->shared) | |
5129 | { | |
5130 | /* If we are generating a shared object, we need to | |
05f927dd | 5131 | output a R_<xxx>_RELATIVE reloc so that the |
3b3753b8 MM |
5132 | dynamic linker can adjust this GOT entry. */ |
5133 | BFD_ASSERT (lsect->rel_section != NULL); | |
5134 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
5135 | } | |
5136 | } | |
5137 | ||
5138 | /* Allocate space for a pointer in the linker section, and allocate a new pointer record | |
5139 | from internal memory. */ | |
5140 | BFD_ASSERT (ptr_linker_section_ptr != NULL); | |
5141 | linker_section_ptr = (elf_linker_section_pointers_t *) | |
5142 | bfd_alloc (abfd, sizeof (elf_linker_section_pointers_t)); | |
5143 | ||
5144 | if (!linker_section_ptr) | |
5145 | return false; | |
5146 | ||
5147 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
5148 | linker_section_ptr->addend = rel->r_addend; | |
5149 | linker_section_ptr->which = lsect->which; | |
5150 | linker_section_ptr->written_address_p = false; | |
5151 | *ptr_linker_section_ptr = linker_section_ptr; | |
5152 | ||
cb73f5d7 | 5153 | #if 0 |
3b3753b8 MM |
5154 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) |
5155 | { | |
cb73f5d7 | 5156 | linker_section_ptr->offset = lsect->section->_raw_size - lsect->hole_size + (ARCH_SIZE / 8); |
3b3753b8 MM |
5157 | lsect->hole_offset += ARCH_SIZE / 8; |
5158 | lsect->sym_offset += ARCH_SIZE / 8; | |
5159 | if (lsect->sym_hash) /* Bump up symbol value if needed */ | |
4a4953f5 MM |
5160 | { |
5161 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; | |
5162 | #ifdef DEBUG | |
5163 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
5164 | lsect->sym_hash->root.root.string, | |
5165 | (long)ARCH_SIZE / 8, | |
5166 | (long)lsect->sym_hash->root.u.def.value); | |
5167 | #endif | |
5168 | } | |
3b3753b8 MM |
5169 | } |
5170 | else | |
cb73f5d7 | 5171 | #endif |
3b3753b8 MM |
5172 | linker_section_ptr->offset = lsect->section->_raw_size; |
5173 | ||
5174 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
5175 | ||
5176 | #ifdef DEBUG | |
5177 | fprintf (stderr, "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
5178 | lsect->name, (long)linker_section_ptr->offset, (long)lsect->section->_raw_size); | |
5179 | #endif | |
5180 | ||
5181 | return true; | |
5182 | } | |
5183 | ||
5184 | \f | |
5185 | #if ARCH_SIZE==64 | |
5186 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
5187 | #endif | |
5188 | #if ARCH_SIZE==32 | |
5189 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
5190 | #endif | |
5191 | ||
5192 | /* Fill in the address for a pointer generated in alinker section. */ | |
5193 | ||
5194 | bfd_vma | |
5195 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, relocation, rel, relative_reloc) | |
5196 | bfd *output_bfd; | |
5197 | bfd *input_bfd; | |
5198 | struct bfd_link_info *info; | |
5199 | elf_linker_section_t *lsect; | |
5200 | struct elf_link_hash_entry *h; | |
5201 | bfd_vma relocation; | |
5202 | const Elf_Internal_Rela *rel; | |
5203 | int relative_reloc; | |
5204 | { | |
5205 | elf_linker_section_pointers_t *linker_section_ptr; | |
5206 | ||
5207 | BFD_ASSERT (lsect != NULL); | |
5208 | ||
3b3753b8 MM |
5209 | if (h != NULL) /* global symbol */ |
5210 | { | |
5211 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
5212 | rel->r_addend, | |
5213 | lsect->which); | |
5214 | ||
5215 | BFD_ASSERT (linker_section_ptr != NULL); | |
5216 | ||
5217 | if (! elf_hash_table (info)->dynamic_sections_created | |
5218 | || (info->shared | |
5219 | && info->symbolic | |
5220 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
5221 | { | |
5222 | /* This is actually a static link, or it is a | |
5223 | -Bsymbolic link and the symbol is defined | |
5224 | locally. We must initialize this entry in the | |
5225 | global section. | |
5226 | ||
5227 | When doing a dynamic link, we create a .rela.<xxx> | |
5228 | relocation entry to initialize the value. This | |
5229 | is done in the finish_dynamic_symbol routine. */ | |
5230 | if (!linker_section_ptr->written_address_p) | |
5231 | { | |
5232 | linker_section_ptr->written_address_p = true; | |
5233 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
5234 | lsect->section->contents + linker_section_ptr->offset); | |
5235 | } | |
5236 | } | |
5237 | } | |
5238 | else /* local symbol */ | |
5239 | { | |
5240 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
5241 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
5242 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
5243 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
5244 | rel->r_addend, | |
5245 | lsect->which); | |
5246 | ||
5247 | BFD_ASSERT (linker_section_ptr != NULL); | |
5248 | ||
5249 | /* Write out pointer if it hasn't been rewritten out before */ | |
5250 | if (!linker_section_ptr->written_address_p) | |
5251 | { | |
5252 | linker_section_ptr->written_address_p = true; | |
5253 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
5254 | lsect->section->contents + linker_section_ptr->offset); | |
5255 | ||
5256 | if (info->shared) | |
5257 | { | |
5258 | asection *srel = lsect->rel_section; | |
5259 | Elf_Internal_Rela outrel; | |
5260 | ||
5261 | /* We need to generate a relative reloc for the dynamic linker. */ | |
5262 | if (!srel) | |
5263 | lsect->rel_section = srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
5264 | lsect->rel_name); | |
5265 | ||
5266 | BFD_ASSERT (srel != NULL); | |
5267 | ||
5268 | outrel.r_offset = (lsect->section->output_section->vma | |
5269 | + lsect->section->output_offset | |
5270 | + linker_section_ptr->offset); | |
5271 | outrel.r_info = ELF_R_INFO (0, relative_reloc); | |
5272 | outrel.r_addend = 0; | |
5273 | elf_swap_reloca_out (output_bfd, &outrel, | |
5a5bac64 | 5274 | (((Elf_External_Rela *) |
3b3753b8 MM |
5275 | lsect->section->contents) |
5276 | + lsect->section->reloc_count)); | |
5277 | ++lsect->section->reloc_count; | |
5278 | } | |
5279 | } | |
5280 | } | |
5281 | ||
5282 | relocation = (lsect->section->output_offset | |
5283 | + linker_section_ptr->offset | |
5284 | - lsect->hole_offset | |
5285 | - lsect->sym_offset); | |
5286 | ||
5287 | #ifdef DEBUG | |
5288 | fprintf (stderr, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
5289 | lsect->name, (long)relocation, (long)relocation); | |
5290 | #endif | |
5291 | ||
5292 | /* Subtract out the addend, because it will get added back in by the normal | |
5293 | processing. */ | |
5294 | return relocation - linker_section_ptr->addend; | |
5295 | } |