Commit | Line | Data |
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252b5132 | 1 | /* ELF linker support. |
68bfbfcc | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* ELF linker code. */ | |
22 | ||
23 | /* This struct is used to pass information to routines called via | |
24 | elf_link_hash_traverse which must return failure. */ | |
25 | ||
26 | struct elf_info_failed | |
27 | { | |
b34976b6 | 28 | bfd_boolean failed; |
252b5132 | 29 | struct bfd_link_info *info; |
bc2b6df7 | 30 | struct bfd_elf_version_tree *verdefs; |
252b5132 RH |
31 | }; |
32 | ||
b34976b6 | 33 | static bfd_boolean is_global_data_symbol_definition |
a7b97311 | 34 | PARAMS ((bfd *, Elf_Internal_Sym *)); |
b34976b6 | 35 | static bfd_boolean elf_link_is_defined_archive_symbol |
a7b97311 | 36 | PARAMS ((bfd *, carsym *)); |
b34976b6 | 37 | static bfd_boolean elf_link_add_object_symbols |
252b5132 | 38 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 39 | static bfd_boolean elf_link_add_archive_symbols |
252b5132 | 40 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 41 | static bfd_boolean elf_merge_symbol |
215007a6 L |
42 | PARAMS ((bfd *, struct bfd_link_info *, const char *, |
43 | Elf_Internal_Sym *, asection **, bfd_vma *, | |
b34976b6 AM |
44 | struct elf_link_hash_entry **, bfd_boolean *, bfd_boolean *, |
45 | bfd_boolean *, bfd_boolean)); | |
46 | static bfd_boolean elf_add_default_symbol | |
215007a6 L |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
48 | const char *, Elf_Internal_Sym *, asection **, bfd_vma *, | |
b34976b6 AM |
49 | bfd_boolean *, bfd_boolean, bfd_boolean)); |
50 | static bfd_boolean elf_export_symbol | |
252b5132 | 51 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 52 | static bfd_boolean elf_finalize_dynstr |
2b0f7ef9 | 53 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 54 | static bfd_boolean elf_fix_symbol_flags |
252b5132 | 55 | PARAMS ((struct elf_link_hash_entry *, struct elf_info_failed *)); |
b34976b6 | 56 | static bfd_boolean elf_adjust_dynamic_symbol |
252b5132 | 57 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 58 | static bfd_boolean elf_link_find_version_dependencies |
252b5132 | 59 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 60 | static bfd_boolean elf_link_assign_sym_version |
252b5132 | 61 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 62 | static bfd_boolean elf_collect_hash_codes |
252b5132 | 63 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 64 | static bfd_boolean elf_link_read_relocs_from_section |
6b5bd373 | 65 | PARAMS ((bfd *, Elf_Internal_Shdr *, PTR, Elf_Internal_Rela *)); |
a7b97311 AM |
66 | static size_t compute_bucket_count |
67 | PARAMS ((struct bfd_link_info *)); | |
b34976b6 | 68 | static bfd_boolean elf_link_output_relocs |
23bc299b | 69 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *)); |
b34976b6 | 70 | static bfd_boolean elf_link_size_reloc_section |
23bc299b | 71 | PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); |
3e932841 KH |
72 | static void elf_link_adjust_relocs |
73 | PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned int, | |
31367b81 | 74 | struct elf_link_hash_entry **)); |
db6751f2 JJ |
75 | static int elf_link_sort_cmp1 |
76 | PARAMS ((const void *, const void *)); | |
77 | static int elf_link_sort_cmp2 | |
78 | PARAMS ((const void *, const void *)); | |
79 | static size_t elf_link_sort_relocs | |
80 | PARAMS ((bfd *, struct bfd_link_info *, asection **)); | |
b34976b6 | 81 | static bfd_boolean elf_section_ignore_discarded_relocs |
73d074b4 | 82 | PARAMS ((asection *)); |
252b5132 RH |
83 | |
84 | /* Given an ELF BFD, add symbols to the global hash table as | |
85 | appropriate. */ | |
86 | ||
b34976b6 | 87 | bfd_boolean |
252b5132 RH |
88 | elf_bfd_link_add_symbols (abfd, info) |
89 | bfd *abfd; | |
90 | struct bfd_link_info *info; | |
91 | { | |
92 | switch (bfd_get_format (abfd)) | |
93 | { | |
94 | case bfd_object: | |
95 | return elf_link_add_object_symbols (abfd, info); | |
96 | case bfd_archive: | |
97 | return elf_link_add_archive_symbols (abfd, info); | |
98 | default: | |
99 | bfd_set_error (bfd_error_wrong_format); | |
b34976b6 | 100 | return FALSE; |
252b5132 RH |
101 | } |
102 | } | |
103 | \f | |
b34976b6 AM |
104 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ |
105 | static bfd_boolean | |
7da9d88f | 106 | is_global_data_symbol_definition (abfd, sym) |
86033394 | 107 | bfd * abfd ATTRIBUTE_UNUSED; |
48dfb430 NC |
108 | Elf_Internal_Sym * sym; |
109 | { | |
110 | /* Local symbols do not count, but target specific ones might. */ | |
111 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
112 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
b34976b6 | 113 | return FALSE; |
48dfb430 | 114 | |
7da9d88f NC |
115 | /* Function symbols do not count. */ |
116 | if (ELF_ST_TYPE (sym->st_info) == STT_FUNC) | |
b34976b6 | 117 | return FALSE; |
7da9d88f | 118 | |
48dfb430 NC |
119 | /* If the section is undefined, then so is the symbol. */ |
120 | if (sym->st_shndx == SHN_UNDEF) | |
b34976b6 | 121 | return FALSE; |
3e932841 | 122 | |
48dfb430 NC |
123 | /* If the symbol is defined in the common section, then |
124 | it is a common definition and so does not count. */ | |
125 | if (sym->st_shndx == SHN_COMMON) | |
b34976b6 | 126 | return FALSE; |
48dfb430 NC |
127 | |
128 | /* If the symbol is in a target specific section then we | |
129 | must rely upon the backend to tell us what it is. */ | |
130 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
131 | /* FIXME - this function is not coded yet: | |
3e932841 | 132 | |
48dfb430 | 133 | return _bfd_is_global_symbol_definition (abfd, sym); |
3e932841 | 134 | |
48dfb430 NC |
135 | Instead for now assume that the definition is not global, |
136 | Even if this is wrong, at least the linker will behave | |
137 | in the same way that it used to do. */ | |
b34976b6 | 138 | return FALSE; |
3e932841 | 139 | |
b34976b6 | 140 | return TRUE; |
48dfb430 NC |
141 | } |
142 | ||
a3a8c91d | 143 | /* Search the symbol table of the archive element of the archive ABFD |
4e8a9624 | 144 | whose archive map contains a mention of SYMDEF, and determine if |
a3a8c91d | 145 | the symbol is defined in this element. */ |
b34976b6 | 146 | static bfd_boolean |
a3a8c91d NC |
147 | elf_link_is_defined_archive_symbol (abfd, symdef) |
148 | bfd * abfd; | |
149 | carsym * symdef; | |
150 | { | |
151 | Elf_Internal_Shdr * hdr; | |
dc810e39 AM |
152 | bfd_size_type symcount; |
153 | bfd_size_type extsymcount; | |
154 | bfd_size_type extsymoff; | |
6cdc0ccc AM |
155 | Elf_Internal_Sym *isymbuf; |
156 | Elf_Internal_Sym *isym; | |
157 | Elf_Internal_Sym *isymend; | |
b34976b6 | 158 | bfd_boolean result; |
3e932841 | 159 | |
a3a8c91d NC |
160 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
161 | if (abfd == (bfd *) NULL) | |
b34976b6 | 162 | return FALSE; |
a3a8c91d NC |
163 | |
164 | if (! bfd_check_format (abfd, bfd_object)) | |
b34976b6 | 165 | return FALSE; |
a3a8c91d | 166 | |
48dfb430 NC |
167 | /* If we have already included the element containing this symbol in the |
168 | link then we do not need to include it again. Just claim that any symbol | |
169 | it contains is not a definition, so that our caller will not decide to | |
170 | (re)include this element. */ | |
171 | if (abfd->archive_pass) | |
b34976b6 | 172 | return FALSE; |
3e932841 | 173 | |
a3a8c91d NC |
174 | /* Select the appropriate symbol table. */ |
175 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
6cdc0ccc | 176 | hdr = &elf_tdata (abfd)->symtab_hdr; |
a3a8c91d | 177 | else |
6cdc0ccc | 178 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
a3a8c91d NC |
179 | |
180 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
181 | ||
182 | /* The sh_info field of the symtab header tells us where the | |
183 | external symbols start. We don't care about the local symbols. */ | |
184 | if (elf_bad_symtab (abfd)) | |
185 | { | |
186 | extsymcount = symcount; | |
187 | extsymoff = 0; | |
188 | } | |
189 | else | |
190 | { | |
191 | extsymcount = symcount - hdr->sh_info; | |
192 | extsymoff = hdr->sh_info; | |
193 | } | |
194 | ||
6cdc0ccc | 195 | if (extsymcount == 0) |
b34976b6 | 196 | return FALSE; |
a3a8c91d | 197 | |
6cdc0ccc AM |
198 | /* Read in the symbol table. */ |
199 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
200 | NULL, NULL, NULL); | |
201 | if (isymbuf == NULL) | |
b34976b6 | 202 | return FALSE; |
a3a8c91d NC |
203 | |
204 | /* Scan the symbol table looking for SYMDEF. */ | |
b34976b6 | 205 | result = FALSE; |
6cdc0ccc | 206 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) |
a3a8c91d | 207 | { |
6cdc0ccc | 208 | const char *name; |
a3a8c91d | 209 | |
6cdc0ccc AM |
210 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
211 | isym->st_name); | |
a3a8c91d NC |
212 | if (name == (const char *) NULL) |
213 | break; | |
214 | ||
215 | if (strcmp (name, symdef->name) == 0) | |
216 | { | |
6cdc0ccc | 217 | result = is_global_data_symbol_definition (abfd, isym); |
a3a8c91d NC |
218 | break; |
219 | } | |
220 | } | |
221 | ||
6cdc0ccc | 222 | free (isymbuf); |
3e932841 | 223 | |
a3a8c91d NC |
224 | return result; |
225 | } | |
226 | \f | |
252b5132 RH |
227 | /* Add symbols from an ELF archive file to the linker hash table. We |
228 | don't use _bfd_generic_link_add_archive_symbols because of a | |
229 | problem which arises on UnixWare. The UnixWare libc.so is an | |
230 | archive which includes an entry libc.so.1 which defines a bunch of | |
231 | symbols. The libc.so archive also includes a number of other | |
232 | object files, which also define symbols, some of which are the same | |
233 | as those defined in libc.so.1. Correct linking requires that we | |
234 | consider each object file in turn, and include it if it defines any | |
235 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
236 | this; it looks through the list of undefined symbols, and includes | |
237 | any object file which defines them. When this algorithm is used on | |
238 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
239 | bunch of symbols. This means that some of the other objects in the | |
240 | archive are not included in the link, which is incorrect since they | |
241 | precede libc.so.1 in the archive. | |
242 | ||
243 | Fortunately, ELF archive handling is simpler than that done by | |
244 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
245 | oddities. In ELF, if we find a symbol in the archive map, and the | |
246 | symbol is currently undefined, we know that we must pull in that | |
247 | object file. | |
248 | ||
249 | Unfortunately, we do have to make multiple passes over the symbol | |
250 | table until nothing further is resolved. */ | |
251 | ||
b34976b6 | 252 | static bfd_boolean |
252b5132 RH |
253 | elf_link_add_archive_symbols (abfd, info) |
254 | bfd *abfd; | |
255 | struct bfd_link_info *info; | |
256 | { | |
257 | symindex c; | |
b34976b6 AM |
258 | bfd_boolean *defined = NULL; |
259 | bfd_boolean *included = NULL; | |
252b5132 | 260 | carsym *symdefs; |
b34976b6 | 261 | bfd_boolean loop; |
dc810e39 | 262 | bfd_size_type amt; |
252b5132 RH |
263 | |
264 | if (! bfd_has_map (abfd)) | |
265 | { | |
266 | /* An empty archive is a special case. */ | |
267 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
b34976b6 | 268 | return TRUE; |
252b5132 | 269 | bfd_set_error (bfd_error_no_armap); |
b34976b6 | 270 | return FALSE; |
252b5132 RH |
271 | } |
272 | ||
273 | /* Keep track of all symbols we know to be already defined, and all | |
274 | files we know to be already included. This is to speed up the | |
275 | second and subsequent passes. */ | |
276 | c = bfd_ardata (abfd)->symdef_count; | |
277 | if (c == 0) | |
b34976b6 | 278 | return TRUE; |
dc810e39 | 279 | amt = c; |
b34976b6 AM |
280 | amt *= sizeof (bfd_boolean); |
281 | defined = (bfd_boolean *) bfd_zmalloc (amt); | |
282 | included = (bfd_boolean *) bfd_zmalloc (amt); | |
283 | if (defined == (bfd_boolean *) NULL || included == (bfd_boolean *) NULL) | |
252b5132 | 284 | goto error_return; |
252b5132 RH |
285 | |
286 | symdefs = bfd_ardata (abfd)->symdefs; | |
287 | ||
288 | do | |
289 | { | |
290 | file_ptr last; | |
291 | symindex i; | |
292 | carsym *symdef; | |
293 | carsym *symdefend; | |
294 | ||
b34976b6 | 295 | loop = FALSE; |
252b5132 RH |
296 | last = -1; |
297 | ||
298 | symdef = symdefs; | |
299 | symdefend = symdef + c; | |
300 | for (i = 0; symdef < symdefend; symdef++, i++) | |
301 | { | |
302 | struct elf_link_hash_entry *h; | |
303 | bfd *element; | |
304 | struct bfd_link_hash_entry *undefs_tail; | |
305 | symindex mark; | |
306 | ||
307 | if (defined[i] || included[i]) | |
308 | continue; | |
309 | if (symdef->file_offset == last) | |
310 | { | |
b34976b6 | 311 | included[i] = TRUE; |
252b5132 RH |
312 | continue; |
313 | } | |
314 | ||
315 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
b34976b6 | 316 | FALSE, FALSE, FALSE); |
252b5132 RH |
317 | |
318 | if (h == NULL) | |
319 | { | |
320 | char *p, *copy; | |
48fc70a2 | 321 | size_t len, first; |
252b5132 RH |
322 | |
323 | /* If this is a default version (the name contains @@), | |
48fc70a2 AM |
324 | look up the symbol again with only one `@' as well |
325 | as without the version. The effect is that references | |
326 | to the symbol with and without the version will be | |
327 | matched by the default symbol in the archive. */ | |
252b5132 RH |
328 | |
329 | p = strchr (symdef->name, ELF_VER_CHR); | |
330 | if (p == NULL || p[1] != ELF_VER_CHR) | |
331 | continue; | |
332 | ||
48fc70a2 AM |
333 | /* First check with only one `@'. */ |
334 | len = strlen (symdef->name); | |
335 | copy = bfd_alloc (abfd, (bfd_size_type) len); | |
252b5132 RH |
336 | if (copy == NULL) |
337 | goto error_return; | |
48fc70a2 AM |
338 | first = p - symdef->name + 1; |
339 | memcpy (copy, symdef->name, first); | |
340 | memcpy (copy + first, symdef->name + first + 1, len - first); | |
252b5132 RH |
341 | |
342 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
b34976b6 | 343 | FALSE, FALSE, FALSE); |
252b5132 | 344 | |
48fc70a2 | 345 | if (h == NULL) |
58821868 | 346 | { |
48fc70a2 AM |
347 | /* We also need to check references to the symbol |
348 | without the version. */ | |
349 | ||
350 | copy[first - 1] = '\0'; | |
351 | h = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 | 352 | copy, FALSE, FALSE, FALSE); |
48fc70a2 AM |
353 | } |
354 | ||
252b5132 RH |
355 | bfd_release (abfd, copy); |
356 | } | |
357 | ||
358 | if (h == NULL) | |
359 | continue; | |
360 | ||
a3a8c91d NC |
361 | if (h->root.type == bfd_link_hash_common) |
362 | { | |
363 | /* We currently have a common symbol. The archive map contains | |
364 | a reference to this symbol, so we may want to include it. We | |
365 | only want to include it however, if this archive element | |
366 | contains a definition of the symbol, not just another common | |
367 | declaration of it. | |
368 | ||
369 | Unfortunately some archivers (including GNU ar) will put | |
370 | declarations of common symbols into their archive maps, as | |
371 | well as real definitions, so we cannot just go by the archive | |
372 | map alone. Instead we must read in the element's symbol | |
373 | table and check that to see what kind of symbol definition | |
374 | this is. */ | |
375 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
376 | continue; | |
377 | } | |
378 | else if (h->root.type != bfd_link_hash_undefined) | |
252b5132 RH |
379 | { |
380 | if (h->root.type != bfd_link_hash_undefweak) | |
b34976b6 | 381 | defined[i] = TRUE; |
252b5132 RH |
382 | continue; |
383 | } | |
384 | ||
385 | /* We need to include this archive member. */ | |
252b5132 RH |
386 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
387 | if (element == (bfd *) NULL) | |
388 | goto error_return; | |
389 | ||
390 | if (! bfd_check_format (element, bfd_object)) | |
391 | goto error_return; | |
392 | ||
393 | /* Doublecheck that we have not included this object | |
394 | already--it should be impossible, but there may be | |
395 | something wrong with the archive. */ | |
396 | if (element->archive_pass != 0) | |
397 | { | |
398 | bfd_set_error (bfd_error_bad_value); | |
399 | goto error_return; | |
400 | } | |
401 | element->archive_pass = 1; | |
402 | ||
403 | undefs_tail = info->hash->undefs_tail; | |
404 | ||
405 | if (! (*info->callbacks->add_archive_element) (info, element, | |
406 | symdef->name)) | |
407 | goto error_return; | |
408 | if (! elf_link_add_object_symbols (element, info)) | |
409 | goto error_return; | |
410 | ||
411 | /* If there are any new undefined symbols, we need to make | |
412 | another pass through the archive in order to see whether | |
413 | they can be defined. FIXME: This isn't perfect, because | |
414 | common symbols wind up on undefs_tail and because an | |
415 | undefined symbol which is defined later on in this pass | |
416 | does not require another pass. This isn't a bug, but it | |
417 | does make the code less efficient than it could be. */ | |
418 | if (undefs_tail != info->hash->undefs_tail) | |
b34976b6 | 419 | loop = TRUE; |
252b5132 RH |
420 | |
421 | /* Look backward to mark all symbols from this object file | |
422 | which we have already seen in this pass. */ | |
423 | mark = i; | |
424 | do | |
425 | { | |
b34976b6 | 426 | included[mark] = TRUE; |
252b5132 RH |
427 | if (mark == 0) |
428 | break; | |
429 | --mark; | |
430 | } | |
431 | while (symdefs[mark].file_offset == symdef->file_offset); | |
432 | ||
433 | /* We mark subsequent symbols from this object file as we go | |
434 | on through the loop. */ | |
435 | last = symdef->file_offset; | |
436 | } | |
437 | } | |
438 | while (loop); | |
439 | ||
440 | free (defined); | |
441 | free (included); | |
442 | ||
b34976b6 | 443 | return TRUE; |
252b5132 RH |
444 | |
445 | error_return: | |
b34976b6 | 446 | if (defined != (bfd_boolean *) NULL) |
252b5132 | 447 | free (defined); |
b34976b6 | 448 | if (included != (bfd_boolean *) NULL) |
252b5132 | 449 | free (included); |
b34976b6 | 450 | return FALSE; |
252b5132 RH |
451 | } |
452 | ||
453 | /* This function is called when we want to define a new symbol. It | |
454 | handles the various cases which arise when we find a definition in | |
455 | a dynamic object, or when there is already a definition in a | |
456 | dynamic object. The new symbol is described by NAME, SYM, PSEC, | |
457 | and PVALUE. We set SYM_HASH to the hash table entry. We set | |
458 | OVERRIDE if the old symbol is overriding a new definition. We set | |
459 | TYPE_CHANGE_OK if it is OK for the type to change. We set | |
460 | SIZE_CHANGE_OK if it is OK for the size to change. By OK to | |
461 | change, we mean that we shouldn't warn if the type or size does | |
456981d7 L |
462 | change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of |
463 | a shared object. */ | |
252b5132 | 464 | |
b34976b6 | 465 | static bfd_boolean |
252b5132 | 466 | elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, |
456981d7 | 467 | override, type_change_ok, size_change_ok, dt_needed) |
252b5132 RH |
468 | bfd *abfd; |
469 | struct bfd_link_info *info; | |
470 | const char *name; | |
471 | Elf_Internal_Sym *sym; | |
472 | asection **psec; | |
473 | bfd_vma *pvalue; | |
474 | struct elf_link_hash_entry **sym_hash; | |
b34976b6 AM |
475 | bfd_boolean *override; |
476 | bfd_boolean *type_change_ok; | |
477 | bfd_boolean *size_change_ok; | |
478 | bfd_boolean dt_needed; | |
252b5132 RH |
479 | { |
480 | asection *sec; | |
481 | struct elf_link_hash_entry *h; | |
482 | int bind; | |
483 | bfd *oldbfd; | |
b34976b6 | 484 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; |
252b5132 | 485 | |
b34976b6 | 486 | *override = FALSE; |
252b5132 RH |
487 | |
488 | sec = *psec; | |
489 | bind = ELF_ST_BIND (sym->st_info); | |
490 | ||
491 | if (! bfd_is_und_section (sec)) | |
b34976b6 | 492 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); |
252b5132 RH |
493 | else |
494 | h = ((struct elf_link_hash_entry *) | |
b34976b6 | 495 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); |
252b5132 | 496 | if (h == NULL) |
b34976b6 | 497 | return FALSE; |
252b5132 RH |
498 | *sym_hash = h; |
499 | ||
500 | /* This code is for coping with dynamic objects, and is only useful | |
501 | if we are doing an ELF link. */ | |
502 | if (info->hash->creator != abfd->xvec) | |
b34976b6 | 503 | return TRUE; |
252b5132 RH |
504 | |
505 | /* For merging, we only care about real symbols. */ | |
506 | ||
507 | while (h->root.type == bfd_link_hash_indirect | |
508 | || h->root.type == bfd_link_hash_warning) | |
509 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
510 | ||
511 | /* If we just created the symbol, mark it as being an ELF symbol. | |
512 | Other than that, there is nothing to do--there is no merge issue | |
513 | with a newly defined symbol--so we just return. */ | |
514 | ||
515 | if (h->root.type == bfd_link_hash_new) | |
516 | { | |
517 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
b34976b6 | 518 | return TRUE; |
252b5132 RH |
519 | } |
520 | ||
521 | /* OLDBFD is a BFD associated with the existing symbol. */ | |
522 | ||
523 | switch (h->root.type) | |
524 | { | |
525 | default: | |
526 | oldbfd = NULL; | |
527 | break; | |
528 | ||
529 | case bfd_link_hash_undefined: | |
530 | case bfd_link_hash_undefweak: | |
531 | oldbfd = h->root.u.undef.abfd; | |
532 | break; | |
533 | ||
534 | case bfd_link_hash_defined: | |
535 | case bfd_link_hash_defweak: | |
536 | oldbfd = h->root.u.def.section->owner; | |
537 | break; | |
538 | ||
539 | case bfd_link_hash_common: | |
540 | oldbfd = h->root.u.c.p->section->owner; | |
541 | break; | |
542 | } | |
543 | ||
b4536acd ILT |
544 | /* In cases involving weak versioned symbols, we may wind up trying |
545 | to merge a symbol with itself. Catch that here, to avoid the | |
546 | confusion that results if we try to override a symbol with | |
accc7f69 ILT |
547 | itself. The additional tests catch cases like |
548 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
549 | dynamic object, which we do want to handle here. */ | |
550 | if (abfd == oldbfd | |
551 | && ((abfd->flags & DYNAMIC) == 0 | |
552 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
b34976b6 | 553 | return TRUE; |
b4536acd | 554 | |
252b5132 RH |
555 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
556 | respectively, is from a dynamic object. */ | |
557 | ||
558 | if ((abfd->flags & DYNAMIC) != 0) | |
b34976b6 | 559 | newdyn = TRUE; |
252b5132 | 560 | else |
b34976b6 | 561 | newdyn = FALSE; |
252b5132 | 562 | |
0035bd7b ILT |
563 | if (oldbfd != NULL) |
564 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
252b5132 | 565 | else |
0035bd7b ILT |
566 | { |
567 | asection *hsec; | |
568 | ||
569 | /* This code handles the special SHN_MIPS_{TEXT,DATA} section | |
c44233aa | 570 | indices used by MIPS ELF. */ |
0035bd7b ILT |
571 | switch (h->root.type) |
572 | { | |
573 | default: | |
574 | hsec = NULL; | |
575 | break; | |
576 | ||
577 | case bfd_link_hash_defined: | |
578 | case bfd_link_hash_defweak: | |
579 | hsec = h->root.u.def.section; | |
580 | break; | |
581 | ||
582 | case bfd_link_hash_common: | |
583 | hsec = h->root.u.c.p->section; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (hsec == NULL) | |
b34976b6 | 588 | olddyn = FALSE; |
0035bd7b ILT |
589 | else |
590 | olddyn = (hsec->symbol->flags & BSF_DYNAMIC) != 0; | |
591 | } | |
252b5132 RH |
592 | |
593 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, | |
594 | respectively, appear to be a definition rather than reference. */ | |
595 | ||
596 | if (bfd_is_und_section (sec) || bfd_is_com_section (sec)) | |
b34976b6 | 597 | newdef = FALSE; |
252b5132 | 598 | else |
b34976b6 | 599 | newdef = TRUE; |
252b5132 RH |
600 | |
601 | if (h->root.type == bfd_link_hash_undefined | |
602 | || h->root.type == bfd_link_hash_undefweak | |
603 | || h->root.type == bfd_link_hash_common) | |
b34976b6 | 604 | olddef = FALSE; |
252b5132 | 605 | else |
b34976b6 | 606 | olddef = TRUE; |
252b5132 RH |
607 | |
608 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old | |
609 | symbol, respectively, appears to be a common symbol in a dynamic | |
610 | object. If a symbol appears in an uninitialized section, and is | |
611 | not weak, and is not a function, then it may be a common symbol | |
612 | which was resolved when the dynamic object was created. We want | |
613 | to treat such symbols specially, because they raise special | |
614 | considerations when setting the symbol size: if the symbol | |
615 | appears as a common symbol in a regular object, and the size in | |
616 | the regular object is larger, we must make sure that we use the | |
617 | larger size. This problematic case can always be avoided in C, | |
618 | but it must be handled correctly when using Fortran shared | |
619 | libraries. | |
620 | ||
621 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
622 | likewise for OLDDYNCOMMON and OLDDEF. | |
623 | ||
624 | Note that this test is just a heuristic, and that it is quite | |
625 | possible to have an uninitialized symbol in a shared object which | |
626 | is really a definition, rather than a common symbol. This could | |
627 | lead to some minor confusion when the symbol really is a common | |
628 | symbol in some regular object. However, I think it will be | |
629 | harmless. */ | |
630 | ||
631 | if (newdyn | |
632 | && newdef | |
633 | && (sec->flags & SEC_ALLOC) != 0 | |
634 | && (sec->flags & SEC_LOAD) == 0 | |
635 | && sym->st_size > 0 | |
636 | && bind != STB_WEAK | |
637 | && ELF_ST_TYPE (sym->st_info) != STT_FUNC) | |
b34976b6 | 638 | newdyncommon = TRUE; |
252b5132 | 639 | else |
b34976b6 | 640 | newdyncommon = FALSE; |
252b5132 RH |
641 | |
642 | if (olddyn | |
643 | && olddef | |
644 | && h->root.type == bfd_link_hash_defined | |
645 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
646 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
647 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
648 | && h->size > 0 | |
649 | && h->type != STT_FUNC) | |
b34976b6 | 650 | olddyncommon = TRUE; |
252b5132 | 651 | else |
b34976b6 | 652 | olddyncommon = FALSE; |
252b5132 RH |
653 | |
654 | /* It's OK to change the type if either the existing symbol or the | |
456981d7 L |
655 | new symbol is weak unless it comes from a DT_NEEDED entry of |
656 | a shared object, in which case, the DT_NEEDED entry may not be | |
3e932841 | 657 | required at the run time. */ |
252b5132 | 658 | |
456981d7 | 659 | if ((! dt_needed && h->root.type == bfd_link_hash_defweak) |
252b5132 RH |
660 | || h->root.type == bfd_link_hash_undefweak |
661 | || bind == STB_WEAK) | |
b34976b6 | 662 | *type_change_ok = TRUE; |
252b5132 RH |
663 | |
664 | /* It's OK to change the size if either the existing symbol or the | |
665 | new symbol is weak, or if the old symbol is undefined. */ | |
666 | ||
667 | if (*type_change_ok | |
668 | || h->root.type == bfd_link_hash_undefined) | |
b34976b6 | 669 | *size_change_ok = TRUE; |
252b5132 RH |
670 | |
671 | /* If both the old and the new symbols look like common symbols in a | |
672 | dynamic object, set the size of the symbol to the larger of the | |
673 | two. */ | |
674 | ||
675 | if (olddyncommon | |
676 | && newdyncommon | |
677 | && sym->st_size != h->size) | |
678 | { | |
679 | /* Since we think we have two common symbols, issue a multiple | |
c44233aa AM |
680 | common warning if desired. Note that we only warn if the |
681 | size is different. If the size is the same, we simply let | |
682 | the old symbol override the new one as normally happens with | |
683 | symbols defined in dynamic objects. */ | |
252b5132 RH |
684 | |
685 | if (! ((*info->callbacks->multiple_common) | |
686 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
687 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
b34976b6 | 688 | return FALSE; |
252b5132 RH |
689 | |
690 | if (sym->st_size > h->size) | |
691 | h->size = sym->st_size; | |
692 | ||
b34976b6 | 693 | *size_change_ok = TRUE; |
252b5132 RH |
694 | } |
695 | ||
696 | /* If we are looking at a dynamic object, and we have found a | |
697 | definition, we need to see if the symbol was already defined by | |
698 | some other object. If so, we want to use the existing | |
699 | definition, and we do not want to report a multiple symbol | |
700 | definition error; we do this by clobbering *PSEC to be | |
701 | bfd_und_section_ptr. | |
702 | ||
703 | We treat a common symbol as a definition if the symbol in the | |
704 | shared library is a function, since common symbols always | |
705 | represent variables; this can cause confusion in principle, but | |
706 | any such confusion would seem to indicate an erroneous program or | |
707 | shared library. We also permit a common symbol in a regular | |
0525d26e ILT |
708 | object to override a weak symbol in a shared object. |
709 | ||
710 | We prefer a non-weak definition in a shared library to a weak | |
456981d7 L |
711 | definition in the executable unless it comes from a DT_NEEDED |
712 | entry of a shared object, in which case, the DT_NEEDED entry | |
3e932841 | 713 | may not be required at the run time. */ |
252b5132 RH |
714 | |
715 | if (newdyn | |
716 | && newdef | |
717 | && (olddef | |
718 | || (h->root.type == bfd_link_hash_common | |
719 | && (bind == STB_WEAK | |
0525d26e | 720 | || ELF_ST_TYPE (sym->st_info) == STT_FUNC))) |
3e932841 | 721 | && (h->root.type != bfd_link_hash_defweak |
456981d7 | 722 | || dt_needed |
0525d26e | 723 | || bind == STB_WEAK)) |
252b5132 | 724 | { |
b34976b6 AM |
725 | *override = TRUE; |
726 | newdef = FALSE; | |
727 | newdyncommon = FALSE; | |
252b5132 RH |
728 | |
729 | *psec = sec = bfd_und_section_ptr; | |
b34976b6 | 730 | *size_change_ok = TRUE; |
252b5132 RH |
731 | |
732 | /* If we get here when the old symbol is a common symbol, then | |
c44233aa AM |
733 | we are explicitly letting it override a weak symbol or |
734 | function in a dynamic object, and we don't want to warn about | |
735 | a type change. If the old symbol is a defined symbol, a type | |
736 | change warning may still be appropriate. */ | |
252b5132 RH |
737 | |
738 | if (h->root.type == bfd_link_hash_common) | |
b34976b6 | 739 | *type_change_ok = TRUE; |
252b5132 RH |
740 | } |
741 | ||
742 | /* Handle the special case of an old common symbol merging with a | |
743 | new symbol which looks like a common symbol in a shared object. | |
744 | We change *PSEC and *PVALUE to make the new symbol look like a | |
745 | common symbol, and let _bfd_generic_link_add_one_symbol will do | |
746 | the right thing. */ | |
747 | ||
748 | if (newdyncommon | |
749 | && h->root.type == bfd_link_hash_common) | |
750 | { | |
b34976b6 AM |
751 | *override = TRUE; |
752 | newdef = FALSE; | |
753 | newdyncommon = FALSE; | |
252b5132 RH |
754 | *pvalue = sym->st_size; |
755 | *psec = sec = bfd_com_section_ptr; | |
b34976b6 | 756 | *size_change_ok = TRUE; |
252b5132 RH |
757 | } |
758 | ||
759 | /* If the old symbol is from a dynamic object, and the new symbol is | |
760 | a definition which is not from a dynamic object, then the new | |
761 | symbol overrides the old symbol. Symbols from regular files | |
762 | always take precedence over symbols from dynamic objects, even if | |
763 | they are defined after the dynamic object in the link. | |
764 | ||
765 | As above, we again permit a common symbol in a regular object to | |
766 | override a definition in a shared object if the shared object | |
0525d26e ILT |
767 | symbol is a function or is weak. |
768 | ||
769 | As above, we permit a non-weak definition in a shared object to | |
770 | override a weak definition in a regular object. */ | |
252b5132 RH |
771 | |
772 | if (! newdyn | |
773 | && (newdef | |
774 | || (bfd_is_com_section (sec) | |
775 | && (h->root.type == bfd_link_hash_defweak | |
776 | || h->type == STT_FUNC))) | |
777 | && olddyn | |
778 | && olddef | |
0525d26e ILT |
779 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
780 | && (bind != STB_WEAK | |
781 | || h->root.type == bfd_link_hash_defweak)) | |
252b5132 RH |
782 | { |
783 | /* Change the hash table entry to undefined, and let | |
784 | _bfd_generic_link_add_one_symbol do the right thing with the | |
785 | new definition. */ | |
786 | ||
787 | h->root.type = bfd_link_hash_undefined; | |
788 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
b34976b6 | 789 | *size_change_ok = TRUE; |
252b5132 | 790 | |
b34976b6 AM |
791 | olddef = FALSE; |
792 | olddyncommon = FALSE; | |
252b5132 RH |
793 | |
794 | /* We again permit a type change when a common symbol may be | |
c44233aa | 795 | overriding a function. */ |
252b5132 RH |
796 | |
797 | if (bfd_is_com_section (sec)) | |
b34976b6 | 798 | *type_change_ok = TRUE; |
252b5132 RH |
799 | |
800 | /* This union may have been set to be non-NULL when this symbol | |
801 | was seen in a dynamic object. We must force the union to be | |
802 | NULL, so that it is correct for a regular symbol. */ | |
803 | ||
804 | h->verinfo.vertree = NULL; | |
805 | ||
806 | /* In this special case, if H is the target of an indirection, | |
c44233aa AM |
807 | we want the caller to frob with H rather than with the |
808 | indirect symbol. That will permit the caller to redefine the | |
809 | target of the indirection, rather than the indirect symbol | |
810 | itself. FIXME: This will break the -y option if we store a | |
811 | symbol with a different name. */ | |
252b5132 RH |
812 | *sym_hash = h; |
813 | } | |
814 | ||
815 | /* Handle the special case of a new common symbol merging with an | |
816 | old symbol that looks like it might be a common symbol defined in | |
817 | a shared object. Note that we have already handled the case in | |
818 | which a new common symbol should simply override the definition | |
819 | in the shared library. */ | |
820 | ||
821 | if (! newdyn | |
822 | && bfd_is_com_section (sec) | |
823 | && olddyncommon) | |
824 | { | |
825 | /* It would be best if we could set the hash table entry to a | |
826 | common symbol, but we don't know what to use for the section | |
827 | or the alignment. */ | |
828 | if (! ((*info->callbacks->multiple_common) | |
829 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
830 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
b34976b6 | 831 | return FALSE; |
252b5132 RH |
832 | |
833 | /* If the predumed common symbol in the dynamic object is | |
c44233aa | 834 | larger, pretend that the new symbol has its size. */ |
252b5132 RH |
835 | |
836 | if (h->size > *pvalue) | |
837 | *pvalue = h->size; | |
838 | ||
839 | /* FIXME: We no longer know the alignment required by the symbol | |
840 | in the dynamic object, so we just wind up using the one from | |
841 | the regular object. */ | |
842 | ||
b34976b6 AM |
843 | olddef = FALSE; |
844 | olddyncommon = FALSE; | |
252b5132 RH |
845 | |
846 | h->root.type = bfd_link_hash_undefined; | |
847 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
848 | ||
b34976b6 AM |
849 | *size_change_ok = TRUE; |
850 | *type_change_ok = TRUE; | |
252b5132 RH |
851 | |
852 | h->verinfo.vertree = NULL; | |
853 | } | |
854 | ||
0525d26e ILT |
855 | /* Handle the special case of a weak definition in a regular object |
856 | followed by a non-weak definition in a shared object. In this | |
456981d7 L |
857 | case, we prefer the definition in the shared object unless it |
858 | comes from a DT_NEEDED entry of a shared object, in which case, | |
3e932841 | 859 | the DT_NEEDED entry may not be required at the run time. */ |
0525d26e | 860 | if (olddef |
456981d7 | 861 | && ! dt_needed |
0525d26e ILT |
862 | && h->root.type == bfd_link_hash_defweak |
863 | && newdef | |
864 | && newdyn | |
865 | && bind != STB_WEAK) | |
b4536acd ILT |
866 | { |
867 | /* To make this work we have to frob the flags so that the rest | |
c44233aa AM |
868 | of the code does not think we are using the regular |
869 | definition. */ | |
64df8d0b ILT |
870 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
871 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
872 | else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0) | |
873 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
874 | h->elf_link_hash_flags &= ~ (ELF_LINK_HASH_DEF_REGULAR | |
875 | | ELF_LINK_HASH_DEF_DYNAMIC); | |
b4536acd ILT |
876 | |
877 | /* If H is the target of an indirection, we want the caller to | |
c44233aa AM |
878 | use H rather than the indirect symbol. Otherwise if we are |
879 | defining a new indirect symbol we will wind up attaching it | |
880 | to the entry we are overriding. */ | |
b4536acd ILT |
881 | *sym_hash = h; |
882 | } | |
0525d26e ILT |
883 | |
884 | /* Handle the special case of a non-weak definition in a shared | |
885 | object followed by a weak definition in a regular object. In | |
886 | this case we prefer to definition in the shared object. To make | |
887 | this work we have to tell the caller to not treat the new symbol | |
888 | as a definition. */ | |
889 | if (olddef | |
890 | && olddyn | |
891 | && h->root.type != bfd_link_hash_defweak | |
892 | && newdef | |
893 | && ! newdyn | |
894 | && bind == STB_WEAK) | |
b34976b6 | 895 | *override = TRUE; |
0525d26e | 896 | |
b34976b6 | 897 | return TRUE; |
252b5132 RH |
898 | } |
899 | ||
215007a6 L |
900 | /* This function is called to create an indirect symbol from the |
901 | default for the symbol with the default version if needed. The | |
871da94f | 902 | symbol is described by H, NAME, SYM, PSEC, VALUE, and OVERRIDE. We |
215007a6 L |
903 | set DYNSYM if the new indirect symbol is dynamic. DT_NEEDED |
904 | indicates if it comes from a DT_NEEDED entry of a shared object. */ | |
905 | ||
b34976b6 | 906 | static bfd_boolean |
871da94f | 907 | elf_add_default_symbol (abfd, info, h, name, sym, psec, value, |
215007a6 L |
908 | dynsym, override, dt_needed) |
909 | bfd *abfd; | |
910 | struct bfd_link_info *info; | |
911 | struct elf_link_hash_entry *h; | |
912 | const char *name; | |
913 | Elf_Internal_Sym *sym; | |
871da94f | 914 | asection **psec; |
215007a6 | 915 | bfd_vma *value; |
b34976b6 AM |
916 | bfd_boolean *dynsym; |
917 | bfd_boolean override; | |
918 | bfd_boolean dt_needed; | |
215007a6 | 919 | { |
b34976b6 AM |
920 | bfd_boolean type_change_ok; |
921 | bfd_boolean size_change_ok; | |
215007a6 L |
922 | char *shortname; |
923 | struct elf_link_hash_entry *hi; | |
14a793b2 | 924 | struct bfd_link_hash_entry *bh; |
215007a6 | 925 | struct elf_backend_data *bed; |
b34976b6 AM |
926 | bfd_boolean collect; |
927 | bfd_boolean dynamic; | |
215007a6 | 928 | char *p; |
d4c88bbb | 929 | size_t len, shortlen; |
871da94f | 930 | asection *sec; |
215007a6 L |
931 | |
932 | /* If this symbol has a version, and it is the default version, we | |
933 | create an indirect symbol from the default name to the fully | |
934 | decorated name. This will cause external references which do not | |
935 | specify a version to be bound to this version of the symbol. */ | |
936 | p = strchr (name, ELF_VER_CHR); | |
937 | if (p == NULL || p[1] != ELF_VER_CHR) | |
b34976b6 | 938 | return TRUE; |
215007a6 L |
939 | |
940 | if (override) | |
941 | { | |
942 | /* We are overridden by an old defition. We need to check if we | |
d4c88bbb | 943 | need to create the indirect symbol from the default name. */ |
b34976b6 AM |
944 | hi = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, |
945 | FALSE, FALSE); | |
215007a6 L |
946 | BFD_ASSERT (hi != NULL); |
947 | if (hi == h) | |
b34976b6 | 948 | return TRUE; |
215007a6 L |
949 | while (hi->root.type == bfd_link_hash_indirect |
950 | || hi->root.type == bfd_link_hash_warning) | |
951 | { | |
952 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
953 | if (hi == h) | |
b34976b6 | 954 | return TRUE; |
215007a6 L |
955 | } |
956 | } | |
957 | ||
958 | bed = get_elf_backend_data (abfd); | |
959 | collect = bed->collect; | |
960 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
961 | ||
d4c88bbb AM |
962 | shortlen = p - name; |
963 | shortname = bfd_hash_allocate (&info->hash->table, shortlen + 1); | |
215007a6 | 964 | if (shortname == NULL) |
b34976b6 | 965 | return FALSE; |
d4c88bbb AM |
966 | memcpy (shortname, name, shortlen); |
967 | shortname[shortlen] = '\0'; | |
215007a6 L |
968 | |
969 | /* We are going to create a new symbol. Merge it with any existing | |
970 | symbol with this name. For the purposes of the merge, act as | |
971 | though we were defining the symbol we just defined, although we | |
972 | actually going to define an indirect symbol. */ | |
b34976b6 AM |
973 | type_change_ok = FALSE; |
974 | size_change_ok = FALSE; | |
871da94f L |
975 | sec = *psec; |
976 | if (! elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
215007a6 L |
977 | &hi, &override, &type_change_ok, |
978 | &size_change_ok, dt_needed)) | |
b34976b6 | 979 | return FALSE; |
215007a6 L |
980 | |
981 | if (! override) | |
982 | { | |
14a793b2 | 983 | bh = &hi->root; |
215007a6 L |
984 | if (! (_bfd_generic_link_add_one_symbol |
985 | (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, | |
b34976b6 AM |
986 | (bfd_vma) 0, name, FALSE, collect, &bh))) |
987 | return FALSE; | |
14a793b2 | 988 | hi = (struct elf_link_hash_entry *) bh; |
215007a6 L |
989 | } |
990 | else | |
991 | { | |
992 | /* In this case the symbol named SHORTNAME is overriding the | |
993 | indirect symbol we want to add. We were planning on making | |
994 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
995 | is the name without a version. NAME is the fully versioned | |
996 | name, and it is the default version. | |
997 | ||
998 | Overriding means that we already saw a definition for the | |
999 | symbol SHORTNAME in a regular object, and it is overriding | |
1000 | the symbol defined in the dynamic object. | |
1001 | ||
1002 | When this happens, we actually want to change NAME, the | |
1003 | symbol we just added, to refer to SHORTNAME. This will cause | |
1004 | references to NAME in the shared object to become references | |
1005 | to SHORTNAME in the regular object. This is what we expect | |
1006 | when we override a function in a shared object: that the | |
1007 | references in the shared object will be mapped to the | |
1008 | definition in the regular object. */ | |
1009 | ||
1010 | while (hi->root.type == bfd_link_hash_indirect | |
1011 | || hi->root.type == bfd_link_hash_warning) | |
1012 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1013 | ||
1014 | h->root.type = bfd_link_hash_indirect; | |
1015 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
1016 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) | |
1017 | { | |
1018 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC; | |
1019 | hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
1020 | if (hi->elf_link_hash_flags | |
1021 | & (ELF_LINK_HASH_REF_REGULAR | |
1022 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1023 | { | |
1024 | if (! _bfd_elf_link_record_dynamic_symbol (info, hi)) | |
b34976b6 | 1025 | return FALSE; |
215007a6 L |
1026 | } |
1027 | } | |
1028 | ||
1029 | /* Now set HI to H, so that the following code will set the | |
c44233aa | 1030 | other fields correctly. */ |
215007a6 L |
1031 | hi = h; |
1032 | } | |
1033 | ||
1034 | /* If there is a duplicate definition somewhere, then HI may not | |
1035 | point to an indirect symbol. We will have reported an error to | |
1036 | the user in that case. */ | |
1037 | ||
1038 | if (hi->root.type == bfd_link_hash_indirect) | |
1039 | { | |
1040 | struct elf_link_hash_entry *ht; | |
1041 | ||
1042 | /* If the symbol became indirect, then we assume that we have | |
1043 | not seen a definition before. */ | |
1044 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1045 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1046 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1047 | ||
1048 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
b48fa14c | 1049 | (*bed->elf_backend_copy_indirect_symbol) (bed, ht, hi); |
215007a6 L |
1050 | |
1051 | /* See if the new flags lead us to realize that the symbol must | |
1052 | be dynamic. */ | |
1053 | if (! *dynsym) | |
1054 | { | |
1055 | if (! dynamic) | |
1056 | { | |
1057 | if (info->shared | |
1058 | || ((hi->elf_link_hash_flags | |
1059 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
b34976b6 | 1060 | *dynsym = TRUE; |
215007a6 L |
1061 | } |
1062 | else | |
1063 | { | |
1064 | if ((hi->elf_link_hash_flags | |
1065 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
b34976b6 | 1066 | *dynsym = TRUE; |
215007a6 L |
1067 | } |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /* We also need to define an indirection from the nondefault version | |
1072 | of the symbol. */ | |
1073 | ||
d4c88bbb AM |
1074 | len = strlen (name); |
1075 | shortname = bfd_hash_allocate (&info->hash->table, len); | |
215007a6 | 1076 | if (shortname == NULL) |
b34976b6 | 1077 | return FALSE; |
d4c88bbb AM |
1078 | memcpy (shortname, name, shortlen); |
1079 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
215007a6 L |
1080 | |
1081 | /* Once again, merge with any existing symbol. */ | |
b34976b6 AM |
1082 | type_change_ok = FALSE; |
1083 | size_change_ok = FALSE; | |
871da94f L |
1084 | sec = *psec; |
1085 | if (! elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
215007a6 L |
1086 | &hi, &override, &type_change_ok, |
1087 | &size_change_ok, dt_needed)) | |
b34976b6 | 1088 | return FALSE; |
215007a6 L |
1089 | |
1090 | if (override) | |
1091 | { | |
1092 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
d8bbe778 L |
1093 | the type of override we do in the case above unless it is |
1094 | overridden by a versioned definiton. */ | |
1095 | if (hi->root.type != bfd_link_hash_defined | |
1096 | && hi->root.type != bfd_link_hash_defweak) | |
1097 | (*_bfd_error_handler) | |
1098 | (_("%s: warning: unexpected redefinition of indirect versioned symbol `%s'"), | |
1099 | bfd_archive_filename (abfd), shortname); | |
215007a6 L |
1100 | } |
1101 | else | |
1102 | { | |
14a793b2 | 1103 | bh = &hi->root; |
215007a6 L |
1104 | if (! (_bfd_generic_link_add_one_symbol |
1105 | (info, abfd, shortname, BSF_INDIRECT, | |
b34976b6 AM |
1106 | bfd_ind_section_ptr, (bfd_vma) 0, name, FALSE, collect, &bh))) |
1107 | return FALSE; | |
14a793b2 | 1108 | hi = (struct elf_link_hash_entry *) bh; |
215007a6 L |
1109 | |
1110 | /* If there is a duplicate definition somewhere, then HI may not | |
1111 | point to an indirect symbol. We will have reported an error | |
1112 | to the user in that case. */ | |
1113 | ||
1114 | if (hi->root.type == bfd_link_hash_indirect) | |
1115 | { | |
1116 | /* If the symbol became indirect, then we assume that we have | |
1117 | not seen a definition before. */ | |
1118 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1119 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1120 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1121 | ||
b48fa14c | 1122 | (*bed->elf_backend_copy_indirect_symbol) (bed, h, hi); |
215007a6 L |
1123 | |
1124 | /* See if the new flags lead us to realize that the symbol | |
1125 | must be dynamic. */ | |
1126 | if (! *dynsym) | |
1127 | { | |
1128 | if (! dynamic) | |
1129 | { | |
1130 | if (info->shared | |
1131 | || ((hi->elf_link_hash_flags | |
1132 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
b34976b6 | 1133 | *dynsym = TRUE; |
215007a6 L |
1134 | } |
1135 | else | |
1136 | { | |
1137 | if ((hi->elf_link_hash_flags | |
1138 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
b34976b6 | 1139 | *dynsym = TRUE; |
215007a6 L |
1140 | } |
1141 | } | |
1142 | } | |
1143 | } | |
1144 | ||
b34976b6 | 1145 | return TRUE; |
215007a6 L |
1146 | } |
1147 | ||
252b5132 RH |
1148 | /* Add symbols from an ELF object file to the linker hash table. */ |
1149 | ||
b34976b6 | 1150 | static bfd_boolean |
252b5132 RH |
1151 | elf_link_add_object_symbols (abfd, info) |
1152 | bfd *abfd; | |
1153 | struct bfd_link_info *info; | |
1154 | { | |
b34976b6 AM |
1155 | bfd_boolean (*add_symbol_hook) |
1156 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
1157 | const char **, flagword *, asection **, bfd_vma *)); | |
1158 | bfd_boolean (*check_relocs) | |
1159 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
1160 | const Elf_Internal_Rela *)); | |
1161 | bfd_boolean collect; | |
252b5132 | 1162 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
1163 | bfd_size_type symcount; |
1164 | bfd_size_type extsymcount; | |
1165 | bfd_size_type extsymoff; | |
252b5132 | 1166 | struct elf_link_hash_entry **sym_hash; |
b34976b6 | 1167 | bfd_boolean dynamic; |
252b5132 RH |
1168 | Elf_External_Versym *extversym = NULL; |
1169 | Elf_External_Versym *ever; | |
252b5132 | 1170 | struct elf_link_hash_entry *weaks; |
6cdc0ccc AM |
1171 | Elf_Internal_Sym *isymbuf = NULL; |
1172 | Elf_Internal_Sym *isym; | |
1173 | Elf_Internal_Sym *isymend; | |
c61b8717 | 1174 | struct elf_backend_data *bed; |
b34976b6 | 1175 | bfd_boolean dt_needed; |
8ea2e4bd | 1176 | struct elf_link_hash_table * hash_table; |
dc810e39 | 1177 | bfd_size_type amt; |
8ea2e4bd NC |
1178 | |
1179 | hash_table = elf_hash_table (info); | |
252b5132 | 1180 | |
c61b8717 RH |
1181 | bed = get_elf_backend_data (abfd); |
1182 | add_symbol_hook = bed->elf_add_symbol_hook; | |
1183 | collect = bed->collect; | |
252b5132 RH |
1184 | |
1185 | if ((abfd->flags & DYNAMIC) == 0) | |
b34976b6 | 1186 | dynamic = FALSE; |
252b5132 RH |
1187 | else |
1188 | { | |
b34976b6 | 1189 | dynamic = TRUE; |
252b5132 RH |
1190 | |
1191 | /* You can't use -r against a dynamic object. Also, there's no | |
1192 | hope of using a dynamic object which does not exactly match | |
1193 | the format of the output file. */ | |
1194 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
1195 | { | |
1196 | bfd_set_error (bfd_error_invalid_operation); | |
1197 | goto error_return; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | /* As a GNU extension, any input sections which are named | |
1202 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
1203 | symbol. This differs from .gnu.warning sections, which generate | |
1204 | warnings when they are included in an output file. */ | |
1205 | if (! info->shared) | |
1206 | { | |
1207 | asection *s; | |
1208 | ||
1209 | for (s = abfd->sections; s != NULL; s = s->next) | |
1210 | { | |
1211 | const char *name; | |
1212 | ||
1213 | name = bfd_get_section_name (abfd, s); | |
1214 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
1215 | { | |
1216 | char *msg; | |
1217 | bfd_size_type sz; | |
1218 | ||
1219 | name += sizeof ".gnu.warning." - 1; | |
1220 | ||
1221 | /* If this is a shared object, then look up the symbol | |
1222 | in the hash table. If it is there, and it is already | |
1223 | been defined, then we will not be using the entry | |
1224 | from this shared object, so we don't need to warn. | |
1225 | FIXME: If we see the definition in a regular object | |
1226 | later on, we will warn, but we shouldn't. The only | |
1227 | fix is to keep track of what warnings we are supposed | |
1228 | to emit, and then handle them all at the end of the | |
1229 | link. */ | |
1230 | if (dynamic && abfd->xvec == info->hash->creator) | |
1231 | { | |
1232 | struct elf_link_hash_entry *h; | |
1233 | ||
8ea2e4bd | 1234 | h = elf_link_hash_lookup (hash_table, name, |
b34976b6 | 1235 | FALSE, FALSE, TRUE); |
252b5132 RH |
1236 | |
1237 | /* FIXME: What about bfd_link_hash_common? */ | |
1238 | if (h != NULL | |
1239 | && (h->root.type == bfd_link_hash_defined | |
1240 | || h->root.type == bfd_link_hash_defweak)) | |
1241 | { | |
1242 | /* We don't want to issue this warning. Clobber | |
c44233aa AM |
1243 | the section size so that the warning does not |
1244 | get copied into the output file. */ | |
252b5132 RH |
1245 | s->_raw_size = 0; |
1246 | continue; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | sz = bfd_section_size (abfd, s); | |
1251 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
1252 | if (msg == NULL) | |
1253 | goto error_return; | |
1254 | ||
1255 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
1256 | goto error_return; | |
1257 | ||
1258 | msg[sz] = '\0'; | |
1259 | ||
1260 | if (! (_bfd_generic_link_add_one_symbol | |
1261 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, | |
b34976b6 | 1262 | FALSE, collect, (struct bfd_link_hash_entry **) NULL))) |
252b5132 RH |
1263 | goto error_return; |
1264 | ||
1265 | if (! info->relocateable) | |
1266 | { | |
1267 | /* Clobber the section size so that the warning does | |
c44233aa | 1268 | not get copied into the output file. */ |
252b5132 RH |
1269 | s->_raw_size = 0; |
1270 | } | |
1271 | } | |
1272 | } | |
1273 | } | |
1274 | ||
b34976b6 | 1275 | dt_needed = FALSE; |
252b5132 RH |
1276 | if (! dynamic) |
1277 | { | |
1278 | /* If we are creating a shared library, create all the dynamic | |
c44233aa AM |
1279 | sections immediately. We need to attach them to something, |
1280 | so we attach them to this BFD, provided it is the right | |
1281 | format. FIXME: If there are no input BFD's of the same | |
1282 | format as the output, we can't make a shared library. */ | |
252b5132 | 1283 | if (info->shared |
8ea2e4bd NC |
1284 | && is_elf_hash_table (info) |
1285 | && ! hash_table->dynamic_sections_created | |
252b5132 RH |
1286 | && abfd->xvec == info->hash->creator) |
1287 | { | |
1288 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1289 | goto error_return; | |
1290 | } | |
1291 | } | |
8ea2e4bd NC |
1292 | else if (! is_elf_hash_table (info)) |
1293 | goto error_return; | |
252b5132 RH |
1294 | else |
1295 | { | |
1296 | asection *s; | |
b34976b6 | 1297 | bfd_boolean add_needed; |
252b5132 RH |
1298 | const char *name; |
1299 | bfd_size_type oldsize; | |
1300 | bfd_size_type strindex; | |
5d603aa9 | 1301 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
252b5132 | 1302 | |
366f2964 AM |
1303 | /* ld --just-symbols and dynamic objects don't mix very well. |
1304 | Test for --just-symbols by looking at info set up by | |
1305 | _bfd_elf_link_just_syms. */ | |
1306 | if ((s = abfd->sections) != NULL | |
68bfbfcc | 1307 | && s->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) |
366f2964 AM |
1308 | goto error_return; |
1309 | ||
252b5132 RH |
1310 | /* Find the name to use in a DT_NEEDED entry that refers to this |
1311 | object. If the object has a DT_SONAME entry, we use it. | |
1312 | Otherwise, if the generic linker stuck something in | |
1313 | elf_dt_name, we use that. Otherwise, we just use the file | |
1314 | name. If the generic linker put a null string into | |
1315 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
1316 | there is a DT_SONAME entry. */ | |
b34976b6 | 1317 | add_needed = TRUE; |
7913c838 | 1318 | name = bfd_get_filename (abfd); |
252b5132 RH |
1319 | if (elf_dt_name (abfd) != NULL) |
1320 | { | |
1321 | name = elf_dt_name (abfd); | |
1322 | if (*name == '\0') | |
74816898 L |
1323 | { |
1324 | if (elf_dt_soname (abfd) != NULL) | |
b34976b6 | 1325 | dt_needed = TRUE; |
74816898 | 1326 | |
b34976b6 | 1327 | add_needed = FALSE; |
74816898 | 1328 | } |
252b5132 RH |
1329 | } |
1330 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1331 | if (s != NULL) | |
1332 | { | |
6cdc0ccc | 1333 | Elf_External_Dyn *dynbuf = NULL; |
252b5132 RH |
1334 | Elf_External_Dyn *extdyn; |
1335 | Elf_External_Dyn *extdynend; | |
1336 | int elfsec; | |
dc810e39 | 1337 | unsigned long shlink; |
252b5132 | 1338 | |
dc810e39 | 1339 | dynbuf = (Elf_External_Dyn *) bfd_malloc (s->_raw_size); |
252b5132 RH |
1340 | if (dynbuf == NULL) |
1341 | goto error_return; | |
1342 | ||
1343 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
1344 | (file_ptr) 0, s->_raw_size)) | |
6cdc0ccc | 1345 | goto error_free_dyn; |
252b5132 RH |
1346 | |
1347 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1348 | if (elfsec == -1) | |
6cdc0ccc | 1349 | goto error_free_dyn; |
dc810e39 | 1350 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; |
252b5132 RH |
1351 | |
1352 | extdyn = dynbuf; | |
1353 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
1354 | for (; extdyn < extdynend; extdyn++) | |
1355 | { | |
1356 | Elf_Internal_Dyn dyn; | |
1357 | ||
1358 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
1359 | if (dyn.d_tag == DT_SONAME) | |
1360 | { | |
dc810e39 AM |
1361 | unsigned int tagv = dyn.d_un.d_val; |
1362 | name = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1363 | if (name == NULL) |
6cdc0ccc | 1364 | goto error_free_dyn; |
252b5132 RH |
1365 | } |
1366 | if (dyn.d_tag == DT_NEEDED) | |
1367 | { | |
1368 | struct bfd_link_needed_list *n, **pn; | |
1369 | char *fnm, *anm; | |
dc810e39 | 1370 | unsigned int tagv = dyn.d_un.d_val; |
252b5132 | 1371 | |
dc810e39 AM |
1372 | amt = sizeof (struct bfd_link_needed_list); |
1373 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1374 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1375 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1376 | goto error_free_dyn; |
d4c88bbb AM |
1377 | amt = strlen (fnm) + 1; |
1378 | anm = bfd_alloc (abfd, amt); | |
252b5132 | 1379 | if (anm == NULL) |
6cdc0ccc | 1380 | goto error_free_dyn; |
d4c88bbb | 1381 | memcpy (anm, fnm, (size_t) amt); |
252b5132 RH |
1382 | n->name = anm; |
1383 | n->by = abfd; | |
1384 | n->next = NULL; | |
8ea2e4bd | 1385 | for (pn = & hash_table->needed; |
252b5132 RH |
1386 | *pn != NULL; |
1387 | pn = &(*pn)->next) | |
1388 | ; | |
1389 | *pn = n; | |
1390 | } | |
a963dc6a L |
1391 | if (dyn.d_tag == DT_RUNPATH) |
1392 | { | |
1393 | struct bfd_link_needed_list *n, **pn; | |
1394 | char *fnm, *anm; | |
dc810e39 | 1395 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1396 | |
dc810e39 AM |
1397 | amt = sizeof (struct bfd_link_needed_list); |
1398 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1399 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1400 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1401 | goto error_free_dyn; |
d4c88bbb AM |
1402 | amt = strlen (fnm) + 1; |
1403 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1404 | if (anm == NULL) |
6cdc0ccc | 1405 | goto error_free_dyn; |
d4c88bbb | 1406 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1407 | n->name = anm; |
1408 | n->by = abfd; | |
1409 | n->next = NULL; | |
5d603aa9 | 1410 | for (pn = & runpath; |
a963dc6a L |
1411 | *pn != NULL; |
1412 | pn = &(*pn)->next) | |
1413 | ; | |
1414 | *pn = n; | |
a963dc6a | 1415 | } |
3e932841 | 1416 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ |
a963dc6a | 1417 | if (!runpath && dyn.d_tag == DT_RPATH) |
c44233aa | 1418 | { |
a963dc6a L |
1419 | struct bfd_link_needed_list *n, **pn; |
1420 | char *fnm, *anm; | |
dc810e39 | 1421 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1422 | |
dc810e39 AM |
1423 | amt = sizeof (struct bfd_link_needed_list); |
1424 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1425 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1426 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1427 | goto error_free_dyn; |
d4c88bbb AM |
1428 | amt = strlen (fnm) + 1; |
1429 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1430 | if (anm == NULL) |
6cdc0ccc AM |
1431 | { |
1432 | error_free_dyn: | |
1433 | free (dynbuf); | |
1434 | goto error_return; | |
1435 | } | |
d4c88bbb | 1436 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1437 | n->name = anm; |
1438 | n->by = abfd; | |
1439 | n->next = NULL; | |
5d603aa9 | 1440 | for (pn = & rpath; |
a963dc6a L |
1441 | *pn != NULL; |
1442 | pn = &(*pn)->next) | |
1443 | ; | |
1444 | *pn = n; | |
a963dc6a | 1445 | } |
252b5132 RH |
1446 | } |
1447 | ||
1448 | free (dynbuf); | |
252b5132 RH |
1449 | } |
1450 | ||
5d603aa9 L |
1451 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that |
1452 | frees all more recently bfd_alloc'd blocks as well. */ | |
1453 | if (runpath) | |
1454 | rpath = runpath; | |
1455 | ||
1456 | if (rpath) | |
1457 | { | |
1458 | struct bfd_link_needed_list **pn; | |
1459 | for (pn = & hash_table->runpath; | |
1460 | *pn != NULL; | |
1461 | pn = &(*pn)->next) | |
1462 | ; | |
1463 | *pn = rpath; | |
1464 | } | |
1465 | ||
252b5132 RH |
1466 | /* We do not want to include any of the sections in a dynamic |
1467 | object in the output file. We hack by simply clobbering the | |
1468 | list of sections in the BFD. This could be handled more | |
1469 | cleanly by, say, a new section flag; the existing | |
1470 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
1471 | still implies that the section takes up space in the output | |
1472 | file. */ | |
c601ffdb | 1473 | bfd_section_list_clear (abfd); |
252b5132 RH |
1474 | |
1475 | /* If this is the first dynamic object found in the link, create | |
1476 | the special sections required for dynamic linking. */ | |
8ea2e4bd NC |
1477 | if (! hash_table->dynamic_sections_created) |
1478 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1479 | goto error_return; | |
252b5132 RH |
1480 | |
1481 | if (add_needed) | |
1482 | { | |
1483 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
2b0f7ef9 | 1484 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
b34976b6 | 1485 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, name, FALSE); |
252b5132 RH |
1486 | if (strindex == (bfd_size_type) -1) |
1487 | goto error_return; | |
1488 | ||
2b0f7ef9 | 1489 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
252b5132 RH |
1490 | { |
1491 | asection *sdyn; | |
1492 | Elf_External_Dyn *dyncon, *dynconend; | |
1493 | ||
1494 | /* The hash table size did not change, which means that | |
1495 | the dynamic object name was already entered. If we | |
1496 | have already included this dynamic object in the | |
1497 | link, just ignore it. There is no reason to include | |
1498 | a particular dynamic object more than once. */ | |
8ea2e4bd | 1499 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); |
252b5132 RH |
1500 | BFD_ASSERT (sdyn != NULL); |
1501 | ||
1502 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
1503 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
1504 | sdyn->_raw_size); | |
1505 | for (; dyncon < dynconend; dyncon++) | |
1506 | { | |
1507 | Elf_Internal_Dyn dyn; | |
1508 | ||
8ea2e4bd | 1509 | elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn); |
252b5132 RH |
1510 | if (dyn.d_tag == DT_NEEDED |
1511 | && dyn.d_un.d_val == strindex) | |
1512 | { | |
2b0f7ef9 | 1513 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); |
b34976b6 | 1514 | return TRUE; |
252b5132 RH |
1515 | } |
1516 | } | |
1517 | } | |
1518 | ||
dc810e39 | 1519 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
252b5132 RH |
1520 | goto error_return; |
1521 | } | |
1522 | ||
1523 | /* Save the SONAME, if there is one, because sometimes the | |
c44233aa | 1524 | linker emulation code will need to know it. */ |
252b5132 | 1525 | if (*name == '\0') |
210ba1e8 | 1526 | name = basename (bfd_get_filename (abfd)); |
252b5132 RH |
1527 | elf_dt_name (abfd) = name; |
1528 | } | |
1529 | ||
6cdc0ccc AM |
1530 | /* If this is a dynamic object, we always link against the .dynsym |
1531 | symbol table, not the .symtab symbol table. The dynamic linker | |
1532 | will only see the .dynsym symbol table, so there is no reason to | |
1533 | look at .symtab for a dynamic object. */ | |
1534 | ||
1535 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
1536 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1537 | else | |
1538 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1539 | ||
1540 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
1541 | ||
1542 | /* The sh_info field of the symtab header tells us where the | |
1543 | external symbols start. We don't care about the local symbols at | |
1544 | this point. */ | |
1545 | if (elf_bad_symtab (abfd)) | |
1546 | { | |
1547 | extsymcount = symcount; | |
1548 | extsymoff = 0; | |
1549 | } | |
1550 | else | |
1551 | { | |
1552 | extsymcount = symcount - hdr->sh_info; | |
1553 | extsymoff = hdr->sh_info; | |
1554 | } | |
252b5132 | 1555 | |
6cdc0ccc AM |
1556 | sym_hash = NULL; |
1557 | if (extsymcount != 0) | |
9ad5cbcf | 1558 | { |
6cdc0ccc AM |
1559 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, |
1560 | NULL, NULL, NULL); | |
1561 | if (isymbuf == NULL) | |
9ad5cbcf | 1562 | goto error_return; |
6cdc0ccc AM |
1563 | |
1564 | /* We store a pointer to the hash table entry for each external | |
1565 | symbol. */ | |
1566 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
1567 | sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt); | |
1568 | if (sym_hash == NULL) | |
1569 | goto error_free_sym; | |
1570 | elf_sym_hashes (abfd) = sym_hash; | |
1571 | } | |
1572 | ||
1573 | if (dynamic) | |
1574 | { | |
1575 | /* Read in any version definitions. */ | |
1576 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1577 | goto error_free_sym; | |
1578 | ||
1579 | /* Read in the symbol versions, but don't bother to convert them | |
1580 | to internal format. */ | |
1581 | if (elf_dynversym (abfd) != 0) | |
1582 | { | |
1583 | Elf_Internal_Shdr *versymhdr; | |
1584 | ||
1585 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1586 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
1587 | if (extversym == NULL) | |
1588 | goto error_free_sym; | |
1589 | amt = versymhdr->sh_size; | |
1590 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
1591 | || bfd_bread ((PTR) extversym, amt, abfd) != amt) | |
1592 | goto error_free_vers; | |
1593 | } | |
9ad5cbcf AM |
1594 | } |
1595 | ||
252b5132 RH |
1596 | weaks = NULL; |
1597 | ||
1598 | ever = extversym != NULL ? extversym + extsymoff : NULL; | |
6cdc0ccc AM |
1599 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
1600 | isym < isymend; | |
1601 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
252b5132 | 1602 | { |
252b5132 RH |
1603 | int bind; |
1604 | bfd_vma value; | |
1605 | asection *sec; | |
1606 | flagword flags; | |
1607 | const char *name; | |
1608 | struct elf_link_hash_entry *h; | |
b34976b6 AM |
1609 | bfd_boolean definition; |
1610 | bfd_boolean size_change_ok, type_change_ok; | |
1611 | bfd_boolean new_weakdef; | |
252b5132 | 1612 | unsigned int old_alignment; |
b34976b6 | 1613 | bfd_boolean override; |
215007a6 | 1614 | |
b34976b6 | 1615 | override = FALSE; |
252b5132 | 1616 | |
252b5132 RH |
1617 | flags = BSF_NO_FLAGS; |
1618 | sec = NULL; | |
6cdc0ccc | 1619 | value = isym->st_value; |
252b5132 RH |
1620 | *sym_hash = NULL; |
1621 | ||
6cdc0ccc | 1622 | bind = ELF_ST_BIND (isym->st_info); |
252b5132 RH |
1623 | if (bind == STB_LOCAL) |
1624 | { | |
1625 | /* This should be impossible, since ELF requires that all | |
1626 | global symbols follow all local symbols, and that sh_info | |
1627 | point to the first global symbol. Unfortunatealy, Irix 5 | |
1628 | screws this up. */ | |
1629 | continue; | |
1630 | } | |
1631 | else if (bind == STB_GLOBAL) | |
1632 | { | |
6cdc0ccc AM |
1633 | if (isym->st_shndx != SHN_UNDEF |
1634 | && isym->st_shndx != SHN_COMMON) | |
252b5132 | 1635 | flags = BSF_GLOBAL; |
252b5132 RH |
1636 | } |
1637 | else if (bind == STB_WEAK) | |
1638 | flags = BSF_WEAK; | |
1639 | else | |
1640 | { | |
1641 | /* Leave it up to the processor backend. */ | |
1642 | } | |
1643 | ||
6cdc0ccc | 1644 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1645 | sec = bfd_und_section_ptr; |
6cdc0ccc | 1646 | else if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 | 1647 | { |
6cdc0ccc | 1648 | sec = section_from_elf_index (abfd, isym->st_shndx); |
252b5132 RH |
1649 | if (sec == NULL) |
1650 | sec = bfd_abs_section_ptr; | |
1651 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1652 | value -= sec->vma; | |
1653 | } | |
6cdc0ccc | 1654 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1655 | sec = bfd_abs_section_ptr; |
6cdc0ccc | 1656 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1657 | { |
1658 | sec = bfd_com_section_ptr; | |
1659 | /* What ELF calls the size we call the value. What ELF | |
1660 | calls the value we call the alignment. */ | |
6cdc0ccc | 1661 | value = isym->st_size; |
252b5132 RH |
1662 | } |
1663 | else | |
1664 | { | |
1665 | /* Leave it up to the processor backend. */ | |
1666 | } | |
1667 | ||
6cdc0ccc AM |
1668 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
1669 | isym->st_name); | |
252b5132 | 1670 | if (name == (const char *) NULL) |
6cdc0ccc | 1671 | goto error_free_vers; |
252b5132 | 1672 | |
6cdc0ccc AM |
1673 | if (isym->st_shndx == SHN_COMMON |
1674 | && ELF_ST_TYPE (isym->st_info) == STT_TLS) | |
13ae64f3 JJ |
1675 | { |
1676 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
1677 | ||
1678 | if (tcomm == NULL) | |
1679 | { | |
1680 | tcomm = bfd_make_section (abfd, ".tcommon"); | |
1681 | if (tcomm == NULL | |
1682 | || !bfd_set_section_flags (abfd, tcomm, (SEC_ALLOC | |
1683 | | SEC_IS_COMMON | |
1684 | | SEC_LINKER_CREATED | |
1685 | | SEC_THREAD_LOCAL))) | |
6cdc0ccc | 1686 | goto error_free_vers; |
13ae64f3 JJ |
1687 | } |
1688 | sec = tcomm; | |
1689 | } | |
1690 | else if (add_symbol_hook) | |
252b5132 | 1691 | { |
6cdc0ccc | 1692 | if (! (*add_symbol_hook) (abfd, info, isym, &name, &flags, &sec, |
252b5132 | 1693 | &value)) |
6cdc0ccc | 1694 | goto error_free_vers; |
252b5132 RH |
1695 | |
1696 | /* The hook function sets the name to NULL if this symbol | |
1697 | should be skipped for some reason. */ | |
1698 | if (name == (const char *) NULL) | |
1699 | continue; | |
1700 | } | |
1701 | ||
1702 | /* Sanity check that all possibilities were handled. */ | |
1703 | if (sec == (asection *) NULL) | |
1704 | { | |
1705 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1706 | goto error_free_vers; |
252b5132 RH |
1707 | } |
1708 | ||
1709 | if (bfd_is_und_section (sec) | |
1710 | || bfd_is_com_section (sec)) | |
b34976b6 | 1711 | definition = FALSE; |
252b5132 | 1712 | else |
b34976b6 | 1713 | definition = TRUE; |
252b5132 | 1714 | |
b34976b6 | 1715 | size_change_ok = FALSE; |
252b5132 RH |
1716 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
1717 | old_alignment = 0; | |
1718 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1719 | { | |
1720 | Elf_Internal_Versym iver; | |
1721 | unsigned int vernum = 0; | |
252b5132 RH |
1722 | |
1723 | if (ever != NULL) | |
1724 | { | |
1725 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
1726 | vernum = iver.vs_vers & VERSYM_VERSION; | |
1727 | ||
1728 | /* If this is a hidden symbol, or if it is not version | |
c44233aa AM |
1729 | 1, we append the version name to the symbol name. |
1730 | However, we do not modify a non-hidden absolute | |
1731 | symbol, because it might be the version symbol | |
1732 | itself. FIXME: What if it isn't? */ | |
252b5132 RH |
1733 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
1734 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
1735 | { | |
1736 | const char *verstr; | |
d4c88bbb | 1737 | size_t namelen, verlen, newlen; |
252b5132 RH |
1738 | char *newname, *p; |
1739 | ||
6cdc0ccc | 1740 | if (isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1741 | { |
1742 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) | |
1743 | { | |
1744 | (*_bfd_error_handler) | |
1745 | (_("%s: %s: invalid version %u (max %d)"), | |
8f615d07 | 1746 | bfd_archive_filename (abfd), name, vernum, |
252b5132 RH |
1747 | elf_tdata (abfd)->dynverdef_hdr.sh_info); |
1748 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1749 | goto error_free_vers; |
252b5132 RH |
1750 | } |
1751 | else if (vernum > 1) | |
1752 | verstr = | |
1753 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1754 | else | |
1755 | verstr = ""; | |
1756 | } | |
1757 | else | |
1758 | { | |
1759 | /* We cannot simply test for the number of | |
1760 | entries in the VERNEED section since the | |
1761 | numbers for the needed versions do not start | |
1762 | at 0. */ | |
1763 | Elf_Internal_Verneed *t; | |
1764 | ||
1765 | verstr = NULL; | |
1766 | for (t = elf_tdata (abfd)->verref; | |
1767 | t != NULL; | |
1768 | t = t->vn_nextref) | |
1769 | { | |
1770 | Elf_Internal_Vernaux *a; | |
1771 | ||
1772 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1773 | { | |
1774 | if (a->vna_other == vernum) | |
1775 | { | |
1776 | verstr = a->vna_nodename; | |
1777 | break; | |
1778 | } | |
1779 | } | |
1780 | if (a != NULL) | |
1781 | break; | |
1782 | } | |
1783 | if (verstr == NULL) | |
1784 | { | |
1785 | (*_bfd_error_handler) | |
1786 | (_("%s: %s: invalid needed version %d"), | |
8f615d07 | 1787 | bfd_archive_filename (abfd), name, vernum); |
252b5132 | 1788 | bfd_set_error (bfd_error_bad_value); |
6cdc0ccc | 1789 | goto error_free_vers; |
252b5132 RH |
1790 | } |
1791 | } | |
1792 | ||
1793 | namelen = strlen (name); | |
d4c88bbb AM |
1794 | verlen = strlen (verstr); |
1795 | newlen = namelen + verlen + 2; | |
1796 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1797 | && isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1798 | ++newlen; |
1799 | ||
d4c88bbb | 1800 | newname = (char *) bfd_alloc (abfd, (bfd_size_type) newlen); |
252b5132 | 1801 | if (newname == NULL) |
6cdc0ccc | 1802 | goto error_free_vers; |
d4c88bbb | 1803 | memcpy (newname, name, namelen); |
252b5132 RH |
1804 | p = newname + namelen; |
1805 | *p++ = ELF_VER_CHR; | |
1287d1cc ILT |
1806 | /* If this is a defined non-hidden version symbol, |
1807 | we add another @ to the name. This indicates the | |
1808 | default version of the symbol. */ | |
1809 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1810 | && isym->st_shndx != SHN_UNDEF) |
252b5132 | 1811 | *p++ = ELF_VER_CHR; |
d4c88bbb | 1812 | memcpy (p, verstr, verlen + 1); |
252b5132 RH |
1813 | |
1814 | name = newname; | |
1815 | } | |
1816 | } | |
1817 | ||
6cdc0ccc | 1818 | if (! elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
252b5132 | 1819 | sym_hash, &override, &type_change_ok, |
456981d7 | 1820 | &size_change_ok, dt_needed)) |
6cdc0ccc | 1821 | goto error_free_vers; |
252b5132 RH |
1822 | |
1823 | if (override) | |
b34976b6 | 1824 | definition = FALSE; |
252b5132 RH |
1825 | |
1826 | h = *sym_hash; | |
1827 | while (h->root.type == bfd_link_hash_indirect | |
1828 | || h->root.type == bfd_link_hash_warning) | |
1829 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1830 | ||
1831 | /* Remember the old alignment if this is a common symbol, so | |
c44233aa AM |
1832 | that we don't reduce the alignment later on. We can't |
1833 | check later, because _bfd_generic_link_add_one_symbol | |
1834 | will set a default for the alignment which we want to | |
1835 | override. */ | |
252b5132 RH |
1836 | if (h->root.type == bfd_link_hash_common) |
1837 | old_alignment = h->root.u.c.p->alignment_power; | |
1838 | ||
1839 | if (elf_tdata (abfd)->verdef != NULL | |
1840 | && ! override | |
1841 | && vernum > 1 | |
1842 | && definition) | |
1843 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
1844 | } | |
1845 | ||
1846 | if (! (_bfd_generic_link_add_one_symbol | |
1847 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
b34976b6 | 1848 | FALSE, collect, (struct bfd_link_hash_entry **) sym_hash))) |
6cdc0ccc | 1849 | goto error_free_vers; |
252b5132 RH |
1850 | |
1851 | h = *sym_hash; | |
1852 | while (h->root.type == bfd_link_hash_indirect | |
1853 | || h->root.type == bfd_link_hash_warning) | |
1854 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1855 | *sym_hash = h; | |
1856 | ||
b34976b6 | 1857 | new_weakdef = FALSE; |
252b5132 RH |
1858 | if (dynamic |
1859 | && definition | |
1860 | && (flags & BSF_WEAK) != 0 | |
6cdc0ccc | 1861 | && ELF_ST_TYPE (isym->st_info) != STT_FUNC |
252b5132 RH |
1862 | && info->hash->creator->flavour == bfd_target_elf_flavour |
1863 | && h->weakdef == NULL) | |
1864 | { | |
1865 | /* Keep a list of all weak defined non function symbols from | |
1866 | a dynamic object, using the weakdef field. Later in this | |
1867 | function we will set the weakdef field to the correct | |
1868 | value. We only put non-function symbols from dynamic | |
1869 | objects on this list, because that happens to be the only | |
1870 | time we need to know the normal symbol corresponding to a | |
1871 | weak symbol, and the information is time consuming to | |
1872 | figure out. If the weakdef field is not already NULL, | |
1873 | then this symbol was already defined by some previous | |
1874 | dynamic object, and we will be using that previous | |
1875 | definition anyhow. */ | |
1876 | ||
1877 | h->weakdef = weaks; | |
1878 | weaks = h; | |
b34976b6 | 1879 | new_weakdef = TRUE; |
252b5132 RH |
1880 | } |
1881 | ||
1882 | /* Set the alignment of a common symbol. */ | |
6cdc0ccc | 1883 | if (isym->st_shndx == SHN_COMMON |
252b5132 RH |
1884 | && h->root.type == bfd_link_hash_common) |
1885 | { | |
1886 | unsigned int align; | |
1887 | ||
6cdc0ccc | 1888 | align = bfd_log2 (isym->st_value); |
724982f6 NC |
1889 | if (align > old_alignment |
1890 | /* Permit an alignment power of zero if an alignment of one | |
1891 | is specified and no other alignments have been specified. */ | |
6cdc0ccc | 1892 | || (isym->st_value == 1 && old_alignment == 0)) |
252b5132 RH |
1893 | h->root.u.c.p->alignment_power = align; |
1894 | } | |
1895 | ||
1896 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1897 | { | |
1898 | int old_flags; | |
b34976b6 | 1899 | bfd_boolean dynsym; |
252b5132 RH |
1900 | int new_flag; |
1901 | ||
1902 | /* Remember the symbol size and type. */ | |
6cdc0ccc | 1903 | if (isym->st_size != 0 |
252b5132 RH |
1904 | && (definition || h->size == 0)) |
1905 | { | |
6cdc0ccc | 1906 | if (h->size != 0 && h->size != isym->st_size && ! size_change_ok) |
252b5132 RH |
1907 | (*_bfd_error_handler) |
1908 | (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"), | |
6cdc0ccc AM |
1909 | name, (unsigned long) h->size, |
1910 | (unsigned long) isym->st_size, bfd_archive_filename (abfd)); | |
252b5132 | 1911 | |
6cdc0ccc | 1912 | h->size = isym->st_size; |
252b5132 RH |
1913 | } |
1914 | ||
1915 | /* If this is a common symbol, then we always want H->SIZE | |
c44233aa AM |
1916 | to be the size of the common symbol. The code just above |
1917 | won't fix the size if a common symbol becomes larger. We | |
1918 | don't warn about a size change here, because that is | |
1919 | covered by --warn-common. */ | |
252b5132 RH |
1920 | if (h->root.type == bfd_link_hash_common) |
1921 | h->size = h->root.u.c.size; | |
1922 | ||
6cdc0ccc | 1923 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE |
252b5132 RH |
1924 | && (definition || h->type == STT_NOTYPE)) |
1925 | { | |
1926 | if (h->type != STT_NOTYPE | |
6cdc0ccc | 1927 | && h->type != ELF_ST_TYPE (isym->st_info) |
252b5132 RH |
1928 | && ! type_change_ok) |
1929 | (*_bfd_error_handler) | |
1930 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
6cdc0ccc | 1931 | name, h->type, ELF_ST_TYPE (isym->st_info), |
8f615d07 | 1932 | bfd_archive_filename (abfd)); |
252b5132 | 1933 | |
6cdc0ccc | 1934 | h->type = ELF_ST_TYPE (isym->st_info); |
252b5132 RH |
1935 | } |
1936 | ||
7a13edea NC |
1937 | /* If st_other has a processor-specific meaning, specific code |
1938 | might be needed here. */ | |
6cdc0ccc | 1939 | if (isym->st_other != 0) |
7a13edea | 1940 | { |
7c25b72c RH |
1941 | unsigned char hvis, symvis, other; |
1942 | ||
1943 | /* Take the balance of OTHER from the definition. */ | |
1944 | other = (definition ? isym->st_other : h->other); | |
1945 | other &= ~ ELF_ST_VISIBILITY (-1); | |
1946 | ||
7a13edea | 1947 | /* Combine visibilities, using the most constraining one. */ |
7c25b72c RH |
1948 | hvis = ELF_ST_VISIBILITY (h->other); |
1949 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
1950 | ||
1951 | h->other = other | (hvis > symvis ? hvis : symvis); | |
7a13edea | 1952 | } |
252b5132 RH |
1953 | |
1954 | /* Set a flag in the hash table entry indicating the type of | |
1955 | reference or definition we just found. Keep a count of | |
1956 | the number of dynamic symbols we find. A dynamic symbol | |
1957 | is one which is referenced or defined by both a regular | |
1958 | object and a shared object. */ | |
1959 | old_flags = h->elf_link_hash_flags; | |
b34976b6 | 1960 | dynsym = FALSE; |
252b5132 RH |
1961 | if (! dynamic) |
1962 | { | |
1963 | if (! definition) | |
1964 | { | |
1965 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1966 | if (bind != STB_WEAK) | |
1967 | new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK; | |
1968 | } | |
1969 | else | |
1970 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1971 | if (info->shared | |
1972 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1973 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
b34976b6 | 1974 | dynsym = TRUE; |
252b5132 RH |
1975 | } |
1976 | else | |
1977 | { | |
1978 | if (! definition) | |
1979 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1980 | else | |
1981 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
1982 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
1983 | | ELF_LINK_HASH_REF_REGULAR)) != 0 | |
1984 | || (h->weakdef != NULL | |
1985 | && ! new_weakdef | |
1986 | && h->weakdef->dynindx != -1)) | |
b34976b6 | 1987 | dynsym = TRUE; |
252b5132 RH |
1988 | } |
1989 | ||
1990 | h->elf_link_hash_flags |= new_flag; | |
1991 | ||
215007a6 L |
1992 | /* Check to see if we need to add an indirect symbol for |
1993 | the default name. */ | |
051b8577 | 1994 | if (definition || h->root.type == bfd_link_hash_common) |
6cdc0ccc | 1995 | if (! elf_add_default_symbol (abfd, info, h, name, isym, |
215007a6 L |
1996 | &sec, &value, &dynsym, |
1997 | override, dt_needed)) | |
6cdc0ccc | 1998 | goto error_free_vers; |
252b5132 RH |
1999 | |
2000 | if (dynsym && h->dynindx == -1) | |
2001 | { | |
2002 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
6cdc0ccc | 2003 | goto error_free_vers; |
252b5132 RH |
2004 | if (h->weakdef != NULL |
2005 | && ! new_weakdef | |
2006 | && h->weakdef->dynindx == -1) | |
2007 | { | |
a7b97311 | 2008 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) |
6cdc0ccc | 2009 | goto error_free_vers; |
252b5132 RH |
2010 | } |
2011 | } | |
38048eb9 | 2012 | else if (dynsym && h->dynindx != -1) |
0444bdd4 L |
2013 | /* If the symbol already has a dynamic index, but |
2014 | visibility says it should not be visible, turn it into | |
2015 | a local symbol. */ | |
2016 | switch (ELF_ST_VISIBILITY (h->other)) | |
2017 | { | |
2018 | case STV_INTERNAL: | |
3e932841 | 2019 | case STV_HIDDEN: |
b34976b6 | 2020 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
0444bdd4 L |
2021 | break; |
2022 | } | |
74816898 L |
2023 | |
2024 | if (dt_needed && definition | |
2025 | && (h->elf_link_hash_flags | |
2026 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
2027 | { | |
2028 | bfd_size_type oldsize; | |
2029 | bfd_size_type strindex; | |
2030 | ||
8ea2e4bd | 2031 | if (! is_elf_hash_table (info)) |
6cdc0ccc | 2032 | goto error_free_vers; |
8ea2e4bd | 2033 | |
74816898 | 2034 | /* The symbol from a DT_NEEDED object is referenced from |
c44233aa | 2035 | the regular object to create a dynamic executable. We |
3e932841 | 2036 | have to make sure there is a DT_NEEDED entry for it. */ |
74816898 | 2037 | |
b34976b6 | 2038 | dt_needed = FALSE; |
2b0f7ef9 JJ |
2039 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
2040 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, | |
b34976b6 | 2041 | elf_dt_soname (abfd), FALSE); |
74816898 | 2042 | if (strindex == (bfd_size_type) -1) |
6cdc0ccc | 2043 | goto error_free_vers; |
74816898 | 2044 | |
2b0f7ef9 | 2045 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
74816898 L |
2046 | { |
2047 | asection *sdyn; | |
2048 | Elf_External_Dyn *dyncon, *dynconend; | |
2049 | ||
8ea2e4bd | 2050 | sdyn = bfd_get_section_by_name (hash_table->dynobj, |
74816898 L |
2051 | ".dynamic"); |
2052 | BFD_ASSERT (sdyn != NULL); | |
2053 | ||
2054 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
2055 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
2056 | sdyn->_raw_size); | |
2057 | for (; dyncon < dynconend; dyncon++) | |
2058 | { | |
2059 | Elf_Internal_Dyn dyn; | |
2060 | ||
8ea2e4bd | 2061 | elf_swap_dyn_in (hash_table->dynobj, |
74816898 L |
2062 | dyncon, &dyn); |
2063 | BFD_ASSERT (dyn.d_tag != DT_NEEDED || | |
2064 | dyn.d_un.d_val != strindex); | |
2065 | } | |
2066 | } | |
2067 | ||
dc810e39 | 2068 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
6cdc0ccc | 2069 | goto error_free_vers; |
74816898 | 2070 | } |
252b5132 RH |
2071 | } |
2072 | } | |
2073 | ||
6cdc0ccc AM |
2074 | if (extversym != NULL) |
2075 | { | |
2076 | free (extversym); | |
2077 | extversym = NULL; | |
2078 | } | |
2079 | ||
2080 | if (isymbuf != NULL) | |
2081 | free (isymbuf); | |
2082 | isymbuf = NULL; | |
2083 | ||
252b5132 RH |
2084 | /* Now set the weakdefs field correctly for all the weak defined |
2085 | symbols we found. The only way to do this is to search all the | |
2086 | symbols. Since we only need the information for non functions in | |
2087 | dynamic objects, that's the only time we actually put anything on | |
2088 | the list WEAKS. We need this information so that if a regular | |
2089 | object refers to a symbol defined weakly in a dynamic object, the | |
2090 | real symbol in the dynamic object is also put in the dynamic | |
2091 | symbols; we also must arrange for both symbols to point to the | |
2092 | same memory location. We could handle the general case of symbol | |
2093 | aliasing, but a general symbol alias can only be generated in | |
2094 | assembler code, handling it correctly would be very time | |
2095 | consuming, and other ELF linkers don't handle general aliasing | |
2096 | either. */ | |
2097 | while (weaks != NULL) | |
2098 | { | |
2099 | struct elf_link_hash_entry *hlook; | |
2100 | asection *slook; | |
2101 | bfd_vma vlook; | |
2102 | struct elf_link_hash_entry **hpp; | |
2103 | struct elf_link_hash_entry **hppend; | |
2104 | ||
2105 | hlook = weaks; | |
2106 | weaks = hlook->weakdef; | |
2107 | hlook->weakdef = NULL; | |
2108 | ||
2109 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
2110 | || hlook->root.type == bfd_link_hash_defweak | |
2111 | || hlook->root.type == bfd_link_hash_common | |
2112 | || hlook->root.type == bfd_link_hash_indirect); | |
2113 | slook = hlook->root.u.def.section; | |
2114 | vlook = hlook->root.u.def.value; | |
2115 | ||
2116 | hpp = elf_sym_hashes (abfd); | |
2117 | hppend = hpp + extsymcount; | |
2118 | for (; hpp < hppend; hpp++) | |
2119 | { | |
2120 | struct elf_link_hash_entry *h; | |
2121 | ||
2122 | h = *hpp; | |
2123 | if (h != NULL && h != hlook | |
2124 | && h->root.type == bfd_link_hash_defined | |
2125 | && h->root.u.def.section == slook | |
2126 | && h->root.u.def.value == vlook) | |
2127 | { | |
2128 | hlook->weakdef = h; | |
2129 | ||
2130 | /* If the weak definition is in the list of dynamic | |
2131 | symbols, make sure the real definition is put there | |
2132 | as well. */ | |
2133 | if (hlook->dynindx != -1 | |
2134 | && h->dynindx == -1) | |
2135 | { | |
2136 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2137 | goto error_return; | |
2138 | } | |
2139 | ||
2140 | /* If the real definition is in the list of dynamic | |
c44233aa AM |
2141 | symbols, make sure the weak definition is put there |
2142 | as well. If we don't do this, then the dynamic | |
2143 | loader might not merge the entries for the real | |
2144 | definition and the weak definition. */ | |
252b5132 RH |
2145 | if (h->dynindx != -1 |
2146 | && hlook->dynindx == -1) | |
2147 | { | |
2148 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
2149 | goto error_return; | |
2150 | } | |
252b5132 RH |
2151 | break; |
2152 | } | |
2153 | } | |
2154 | } | |
2155 | ||
252b5132 RH |
2156 | /* If this object is the same format as the output object, and it is |
2157 | not a shared library, then let the backend look through the | |
2158 | relocs. | |
2159 | ||
2160 | This is required to build global offset table entries and to | |
2161 | arrange for dynamic relocs. It is not required for the | |
2162 | particular common case of linking non PIC code, even when linking | |
2163 | against shared libraries, but unfortunately there is no way of | |
2164 | knowing whether an object file has been compiled PIC or not. | |
2165 | Looking through the relocs is not particularly time consuming. | |
2166 | The problem is that we must either (1) keep the relocs in memory, | |
2167 | which causes the linker to require additional runtime memory or | |
2168 | (2) read the relocs twice from the input file, which wastes time. | |
2169 | This would be a good case for using mmap. | |
2170 | ||
2171 | I have no idea how to handle linking PIC code into a file of a | |
2172 | different format. It probably can't be done. */ | |
2173 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
2174 | if (! dynamic | |
2175 | && abfd->xvec == info->hash->creator | |
2176 | && check_relocs != NULL) | |
2177 | { | |
2178 | asection *o; | |
2179 | ||
2180 | for (o = abfd->sections; o != NULL; o = o->next) | |
2181 | { | |
2182 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2183 | bfd_boolean ok; |
252b5132 RH |
2184 | |
2185 | if ((o->flags & SEC_RELOC) == 0 | |
2186 | || o->reloc_count == 0 | |
2187 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2188 | && (o->flags & SEC_DEBUGGING) != 0) | |
2189 | || bfd_is_abs_section (o->output_section)) | |
2190 | continue; | |
2191 | ||
2192 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
2193 | (abfd, o, (PTR) NULL, | |
2194 | (Elf_Internal_Rela *) NULL, | |
2195 | info->keep_memory)); | |
2196 | if (internal_relocs == NULL) | |
2197 | goto error_return; | |
2198 | ||
2199 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
2200 | ||
6cdc0ccc | 2201 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2202 | free (internal_relocs); |
2203 | ||
2204 | if (! ok) | |
2205 | goto error_return; | |
2206 | } | |
2207 | } | |
2208 | ||
d6fe2dc1 AM |
2209 | /* If this is a non-traditional link, try to optimize the handling |
2210 | of the .stab/.stabstr sections. */ | |
252b5132 | 2211 | if (! dynamic |
252b5132 RH |
2212 | && ! info->traditional_format |
2213 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
8ea2e4bd | 2214 | && is_elf_hash_table (info) |
252b5132 RH |
2215 | && (info->strip != strip_all && info->strip != strip_debugger)) |
2216 | { | |
2217 | asection *stab, *stabstr; | |
2218 | ||
2219 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
2d653fc7 AM |
2220 | if (stab != NULL |
2221 | && (stab->flags & SEC_MERGE) == 0 | |
2222 | && !bfd_is_abs_section (stab->output_section)) | |
252b5132 RH |
2223 | { |
2224 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
2225 | ||
2226 | if (stabstr != NULL) | |
2227 | { | |
2228 | struct bfd_elf_section_data *secdata; | |
2229 | ||
2230 | secdata = elf_section_data (stab); | |
2231 | if (! _bfd_link_section_stabs (abfd, | |
8ea2e4bd | 2232 | & hash_table->stab_info, |
252b5132 | 2233 | stab, stabstr, |
65765700 | 2234 | &secdata->sec_info)) |
252b5132 | 2235 | goto error_return; |
65765700 | 2236 | if (secdata->sec_info) |
68bfbfcc | 2237 | stab->sec_info_type = ELF_INFO_TYPE_STABS; |
252b5132 RH |
2238 | } |
2239 | } | |
2240 | } | |
2241 | ||
8ea2e4bd NC |
2242 | if (! info->relocateable && ! dynamic |
2243 | && is_elf_hash_table (info)) | |
f5fa8ca2 JJ |
2244 | { |
2245 | asection *s; | |
2246 | ||
2247 | for (s = abfd->sections; s != NULL; s = s->next) | |
2d653fc7 AM |
2248 | if ((s->flags & SEC_MERGE) != 0 |
2249 | && !bfd_is_abs_section (s->output_section)) | |
65765700 JJ |
2250 | { |
2251 | struct bfd_elf_section_data *secdata; | |
2252 | ||
2253 | secdata = elf_section_data (s); | |
2254 | if (! _bfd_merge_section (abfd, | |
2255 | & hash_table->merge_info, | |
2256 | s, &secdata->sec_info)) | |
2257 | goto error_return; | |
2258 | else if (secdata->sec_info) | |
68bfbfcc | 2259 | s->sec_info_type = ELF_INFO_TYPE_MERGE; |
65765700 | 2260 | } |
f5fa8ca2 JJ |
2261 | } |
2262 | ||
f5d44ba0 AM |
2263 | if (is_elf_hash_table (info)) |
2264 | { | |
2265 | /* Add this bfd to the loaded list. */ | |
2266 | struct elf_link_loaded_list *n; | |
2267 | ||
2268 | n = ((struct elf_link_loaded_list *) | |
2269 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list))); | |
2270 | if (n == NULL) | |
2271 | goto error_return; | |
2272 | n->abfd = abfd; | |
2273 | n->next = hash_table->loaded; | |
2274 | hash_table->loaded = n; | |
2275 | } | |
2276 | ||
b34976b6 | 2277 | return TRUE; |
252b5132 | 2278 | |
6cdc0ccc | 2279 | error_free_vers: |
252b5132 RH |
2280 | if (extversym != NULL) |
2281 | free (extversym); | |
6cdc0ccc AM |
2282 | error_free_sym: |
2283 | if (isymbuf != NULL) | |
2284 | free (isymbuf); | |
2285 | error_return: | |
b34976b6 | 2286 | return FALSE; |
252b5132 RH |
2287 | } |
2288 | ||
2289 | /* Create some sections which will be filled in with dynamic linking | |
2290 | information. ABFD is an input file which requires dynamic sections | |
2291 | to be created. The dynamic sections take up virtual memory space | |
2292 | when the final executable is run, so we need to create them before | |
2293 | addresses are assigned to the output sections. We work out the | |
2294 | actual contents and size of these sections later. */ | |
2295 | ||
b34976b6 | 2296 | bfd_boolean |
252b5132 RH |
2297 | elf_link_create_dynamic_sections (abfd, info) |
2298 | bfd *abfd; | |
2299 | struct bfd_link_info *info; | |
2300 | { | |
2301 | flagword flags; | |
2302 | register asection *s; | |
2303 | struct elf_link_hash_entry *h; | |
14a793b2 | 2304 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
2305 | struct elf_backend_data *bed; |
2306 | ||
8ea2e4bd | 2307 | if (! is_elf_hash_table (info)) |
b34976b6 | 2308 | return FALSE; |
8ea2e4bd | 2309 | |
252b5132 | 2310 | if (elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 2311 | return TRUE; |
252b5132 RH |
2312 | |
2313 | /* Make sure that all dynamic sections use the same input BFD. */ | |
2314 | if (elf_hash_table (info)->dynobj == NULL) | |
2315 | elf_hash_table (info)->dynobj = abfd; | |
2316 | else | |
2317 | abfd = elf_hash_table (info)->dynobj; | |
2318 | ||
2319 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
2320 | sections. */ | |
2321 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
2322 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2323 | ||
2324 | /* A dynamically linked executable has a .interp section, but a | |
2325 | shared library does not. */ | |
2326 | if (! info->shared) | |
2327 | { | |
2328 | s = bfd_make_section (abfd, ".interp"); | |
2329 | if (s == NULL | |
2330 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2331 | return FALSE; |
252b5132 RH |
2332 | } |
2333 | ||
65765700 JJ |
2334 | if (! info->traditional_format |
2335 | && info->hash->creator->flavour == bfd_target_elf_flavour) | |
2336 | { | |
2337 | s = bfd_make_section (abfd, ".eh_frame_hdr"); | |
2338 | if (s == NULL | |
2339 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2340 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
b34976b6 | 2341 | return FALSE; |
126495ed | 2342 | elf_hash_table (info)->eh_info.hdr_sec = s; |
65765700 JJ |
2343 | } |
2344 | ||
252b5132 RH |
2345 | /* Create sections to hold version informations. These are removed |
2346 | if they are not needed. */ | |
2347 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
2348 | if (s == NULL | |
2349 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2350 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2351 | return FALSE; |
252b5132 RH |
2352 | |
2353 | s = bfd_make_section (abfd, ".gnu.version"); | |
2354 | if (s == NULL | |
2355 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2356 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
b34976b6 | 2357 | return FALSE; |
252b5132 RH |
2358 | |
2359 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
2360 | if (s == NULL | |
2361 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2362 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2363 | return FALSE; |
252b5132 RH |
2364 | |
2365 | s = bfd_make_section (abfd, ".dynsym"); | |
2366 | if (s == NULL | |
2367 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2368 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2369 | return FALSE; |
252b5132 RH |
2370 | |
2371 | s = bfd_make_section (abfd, ".dynstr"); | |
2372 | if (s == NULL | |
2373 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2374 | return FALSE; |
252b5132 RH |
2375 | |
2376 | /* Create a strtab to hold the dynamic symbol names. */ | |
2377 | if (elf_hash_table (info)->dynstr == NULL) | |
2378 | { | |
2b0f7ef9 | 2379 | elf_hash_table (info)->dynstr = _bfd_elf_strtab_init (); |
252b5132 | 2380 | if (elf_hash_table (info)->dynstr == NULL) |
b34976b6 | 2381 | return FALSE; |
252b5132 RH |
2382 | } |
2383 | ||
2384 | s = bfd_make_section (abfd, ".dynamic"); | |
2385 | if (s == NULL | |
2386 | || ! bfd_set_section_flags (abfd, s, flags) | |
2387 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2388 | return FALSE; |
252b5132 RH |
2389 | |
2390 | /* The special symbol _DYNAMIC is always set to the start of the | |
2391 | .dynamic section. This call occurs before we have processed the | |
2392 | symbols for any dynamic object, so we don't have to worry about | |
2393 | overriding a dynamic definition. We could set _DYNAMIC in a | |
2394 | linker script, but we only want to define it if we are, in fact, | |
2395 | creating a .dynamic section. We don't want to define it if there | |
2396 | is no .dynamic section, since on some ELF platforms the start up | |
2397 | code examines it to decide how to initialize the process. */ | |
14a793b2 | 2398 | bh = NULL; |
252b5132 RH |
2399 | if (! (_bfd_generic_link_add_one_symbol |
2400 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
b34976b6 AM |
2401 | (const char *) 0, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
2402 | return FALSE; | |
14a793b2 | 2403 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
2404 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
2405 | h->type = STT_OBJECT; | |
2406 | ||
2407 | if (info->shared | |
2408 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2409 | return FALSE; |
252b5132 | 2410 | |
c7ac6ff8 MM |
2411 | bed = get_elf_backend_data (abfd); |
2412 | ||
252b5132 RH |
2413 | s = bfd_make_section (abfd, ".hash"); |
2414 | if (s == NULL | |
2415 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2416 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2417 | return FALSE; |
c7ac6ff8 | 2418 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; |
252b5132 RH |
2419 | |
2420 | /* Let the backend create the rest of the sections. This lets the | |
2421 | backend set the right flags. The backend will normally create | |
2422 | the .got and .plt sections. */ | |
252b5132 | 2423 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) |
b34976b6 | 2424 | return FALSE; |
252b5132 | 2425 | |
b34976b6 | 2426 | elf_hash_table (info)->dynamic_sections_created = TRUE; |
252b5132 | 2427 | |
b34976b6 | 2428 | return TRUE; |
252b5132 RH |
2429 | } |
2430 | ||
2431 | /* Add an entry to the .dynamic table. */ | |
2432 | ||
b34976b6 | 2433 | bfd_boolean |
252b5132 RH |
2434 | elf_add_dynamic_entry (info, tag, val) |
2435 | struct bfd_link_info *info; | |
2436 | bfd_vma tag; | |
2437 | bfd_vma val; | |
2438 | { | |
2439 | Elf_Internal_Dyn dyn; | |
2440 | bfd *dynobj; | |
2441 | asection *s; | |
dc810e39 | 2442 | bfd_size_type newsize; |
252b5132 RH |
2443 | bfd_byte *newcontents; |
2444 | ||
8ea2e4bd | 2445 | if (! is_elf_hash_table (info)) |
b34976b6 | 2446 | return FALSE; |
8ea2e4bd | 2447 | |
252b5132 RH |
2448 | dynobj = elf_hash_table (info)->dynobj; |
2449 | ||
2450 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2451 | BFD_ASSERT (s != NULL); | |
2452 | ||
2453 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
2454 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); | |
2455 | if (newcontents == NULL) | |
b34976b6 | 2456 | return FALSE; |
252b5132 RH |
2457 | |
2458 | dyn.d_tag = tag; | |
2459 | dyn.d_un.d_val = val; | |
2460 | elf_swap_dyn_out (dynobj, &dyn, | |
2461 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
2462 | ||
2463 | s->_raw_size = newsize; | |
2464 | s->contents = newcontents; | |
2465 | ||
b34976b6 | 2466 | return TRUE; |
252b5132 RH |
2467 | } |
2468 | \f | |
6b5bd373 MM |
2469 | /* Read and swap the relocs from the section indicated by SHDR. This |
2470 | may be either a REL or a RELA section. The relocations are | |
2471 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2472 | which should have already been allocated to contain enough space. | |
2473 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2474 | relocations should be stored. | |
2475 | ||
b34976b6 | 2476 | Returns FALSE if something goes wrong. */ |
6b5bd373 | 2477 | |
b34976b6 | 2478 | static bfd_boolean |
6b5bd373 MM |
2479 | elf_link_read_relocs_from_section (abfd, shdr, external_relocs, |
2480 | internal_relocs) | |
2481 | bfd *abfd; | |
2482 | Elf_Internal_Shdr *shdr; | |
2483 | PTR external_relocs; | |
2484 | Elf_Internal_Rela *internal_relocs; | |
2485 | { | |
c7ac6ff8 | 2486 | struct elf_backend_data *bed; |
947216bf AM |
2487 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
2488 | const bfd_byte *erela; | |
2489 | const bfd_byte *erelaend; | |
2490 | Elf_Internal_Rela *irela; | |
c7ac6ff8 | 2491 | |
6b5bd373 MM |
2492 | /* If there aren't any relocations, that's OK. */ |
2493 | if (!shdr) | |
b34976b6 | 2494 | return TRUE; |
6b5bd373 MM |
2495 | |
2496 | /* Position ourselves at the start of the section. */ | |
2497 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
b34976b6 | 2498 | return FALSE; |
6b5bd373 MM |
2499 | |
2500 | /* Read the relocations. */ | |
dc810e39 | 2501 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) |
b34976b6 | 2502 | return FALSE; |
6b5bd373 | 2503 | |
c7ac6ff8 MM |
2504 | bed = get_elf_backend_data (abfd); |
2505 | ||
6b5bd373 MM |
2506 | /* Convert the external relocations to the internal format. */ |
2507 | if (shdr->sh_entsize == sizeof (Elf_External_Rel)) | |
947216bf AM |
2508 | swap_in = bed->s->swap_reloc_in; |
2509 | else if (shdr->sh_entsize == sizeof (Elf_External_Rela)) | |
2510 | swap_in = bed->s->swap_reloca_in; | |
6b5bd373 | 2511 | else |
947216bf | 2512 | abort (); |
6b5bd373 | 2513 | |
947216bf AM |
2514 | erela = external_relocs; |
2515 | erelaend = erela + NUM_SHDR_ENTRIES (shdr) * shdr->sh_entsize; | |
2516 | irela = internal_relocs; | |
2517 | while (erela < erelaend) | |
2518 | { | |
2519 | (*swap_in) (abfd, erela, irela); | |
2520 | irela += bed->s->int_rels_per_ext_rel; | |
2521 | erela += shdr->sh_entsize; | |
6b5bd373 MM |
2522 | } |
2523 | ||
b34976b6 | 2524 | return TRUE; |
6b5bd373 MM |
2525 | } |
2526 | ||
23bc299b MM |
2527 | /* Read and swap the relocs for a section O. They may have been |
2528 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2529 | not NULL, they are used as buffers to read into. They are known to | |
2530 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2531 | the return value is allocated using either malloc or bfd_alloc, | |
2532 | according to the KEEP_MEMORY argument. If O has two relocation | |
2533 | sections (both REL and RELA relocations), then the REL_HDR | |
2534 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
2535 | REL_HDR2 relocations. */ | |
252b5132 RH |
2536 | |
2537 | Elf_Internal_Rela * | |
2538 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
2539 | keep_memory) | |
2540 | bfd *abfd; | |
2541 | asection *o; | |
2542 | PTR external_relocs; | |
2543 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2544 | bfd_boolean keep_memory; |
252b5132 RH |
2545 | { |
2546 | Elf_Internal_Shdr *rel_hdr; | |
2547 | PTR alloc1 = NULL; | |
2548 | Elf_Internal_Rela *alloc2 = NULL; | |
c7ac6ff8 | 2549 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
2550 | |
2551 | if (elf_section_data (o)->relocs != NULL) | |
2552 | return elf_section_data (o)->relocs; | |
2553 | ||
2554 | if (o->reloc_count == 0) | |
2555 | return NULL; | |
2556 | ||
2557 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
2558 | ||
2559 | if (internal_relocs == NULL) | |
2560 | { | |
dc810e39 | 2561 | bfd_size_type size; |
252b5132 | 2562 | |
dc810e39 AM |
2563 | size = o->reloc_count; |
2564 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
252b5132 RH |
2565 | if (keep_memory) |
2566 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
2567 | else | |
2568 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); | |
2569 | if (internal_relocs == NULL) | |
2570 | goto error_return; | |
2571 | } | |
2572 | ||
2573 | if (external_relocs == NULL) | |
2574 | { | |
dc810e39 | 2575 | bfd_size_type size = rel_hdr->sh_size; |
6b5bd373 MM |
2576 | |
2577 | if (elf_section_data (o)->rel_hdr2) | |
dc810e39 | 2578 | size += elf_section_data (o)->rel_hdr2->sh_size; |
6b5bd373 | 2579 | alloc1 = (PTR) bfd_malloc (size); |
252b5132 RH |
2580 | if (alloc1 == NULL) |
2581 | goto error_return; | |
2582 | external_relocs = alloc1; | |
2583 | } | |
2584 | ||
6b5bd373 MM |
2585 | if (!elf_link_read_relocs_from_section (abfd, rel_hdr, |
2586 | external_relocs, | |
2587 | internal_relocs)) | |
2588 | goto error_return; | |
3e932841 KH |
2589 | if (!elf_link_read_relocs_from_section |
2590 | (abfd, | |
6b5bd373 | 2591 | elf_section_data (o)->rel_hdr2, |
2f5116e2 | 2592 | ((bfd_byte *) external_relocs) + rel_hdr->sh_size, |
d9bc7a44 | 2593 | internal_relocs + (NUM_SHDR_ENTRIES (rel_hdr) |
c7ac6ff8 | 2594 | * bed->s->int_rels_per_ext_rel))) |
252b5132 | 2595 | goto error_return; |
252b5132 RH |
2596 | |
2597 | /* Cache the results for next time, if we can. */ | |
2598 | if (keep_memory) | |
2599 | elf_section_data (o)->relocs = internal_relocs; | |
2600 | ||
2601 | if (alloc1 != NULL) | |
2602 | free (alloc1); | |
2603 | ||
2604 | /* Don't free alloc2, since if it was allocated we are passing it | |
2605 | back (under the name of internal_relocs). */ | |
2606 | ||
2607 | return internal_relocs; | |
2608 | ||
2609 | error_return: | |
2610 | if (alloc1 != NULL) | |
2611 | free (alloc1); | |
2612 | if (alloc2 != NULL) | |
2613 | free (alloc2); | |
2614 | return NULL; | |
2615 | } | |
2616 | \f | |
252b5132 RH |
2617 | /* Record an assignment to a symbol made by a linker script. We need |
2618 | this in case some dynamic object refers to this symbol. */ | |
2619 | ||
b34976b6 | 2620 | bfd_boolean |
252b5132 | 2621 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) |
7442e600 | 2622 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2623 | struct bfd_link_info *info; |
2624 | const char *name; | |
b34976b6 | 2625 | bfd_boolean provide; |
252b5132 RH |
2626 | { |
2627 | struct elf_link_hash_entry *h; | |
2628 | ||
2629 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2630 | return TRUE; |
252b5132 | 2631 | |
b34976b6 | 2632 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, TRUE, FALSE); |
252b5132 | 2633 | if (h == NULL) |
b34976b6 | 2634 | return FALSE; |
252b5132 RH |
2635 | |
2636 | if (h->root.type == bfd_link_hash_new) | |
a7b97311 | 2637 | h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
252b5132 RH |
2638 | |
2639 | /* If this symbol is being provided by the linker script, and it is | |
2640 | currently defined by a dynamic object, but not by a regular | |
2641 | object, then mark it as undefined so that the generic linker will | |
2642 | force the correct value. */ | |
2643 | if (provide | |
2644 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2645 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2646 | h->root.type = bfd_link_hash_undefined; | |
2647 | ||
2648 | /* If this symbol is not being provided by the linker script, and it is | |
2649 | currently defined by a dynamic object, but not by a regular object, | |
2650 | then clear out any version information because the symbol will not be | |
2651 | associated with the dynamic object any more. */ | |
2652 | if (!provide | |
2653 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2654 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2655 | h->verinfo.verdef = NULL; | |
2656 | ||
2657 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
994819d2 | 2658 | |
252b5132 RH |
2659 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
2660 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
2661 | || info->shared) | |
2662 | && h->dynindx == -1) | |
2663 | { | |
2664 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2665 | return FALSE; |
252b5132 RH |
2666 | |
2667 | /* If this is a weak defined symbol, and we know a corresponding | |
2668 | real symbol from the same dynamic object, make sure the real | |
2669 | symbol is also made into a dynamic symbol. */ | |
2670 | if (h->weakdef != NULL | |
2671 | && h->weakdef->dynindx == -1) | |
2672 | { | |
2673 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
b34976b6 | 2674 | return FALSE; |
252b5132 RH |
2675 | } |
2676 | } | |
2677 | ||
b34976b6 | 2678 | return TRUE; |
252b5132 RH |
2679 | } |
2680 | \f | |
2681 | /* This structure is used to pass information to | |
2682 | elf_link_assign_sym_version. */ | |
2683 | ||
2684 | struct elf_assign_sym_version_info | |
2685 | { | |
2686 | /* Output BFD. */ | |
2687 | bfd *output_bfd; | |
2688 | /* General link information. */ | |
2689 | struct bfd_link_info *info; | |
2690 | /* Version tree. */ | |
2691 | struct bfd_elf_version_tree *verdefs; | |
252b5132 | 2692 | /* Whether we had a failure. */ |
b34976b6 | 2693 | bfd_boolean failed; |
252b5132 RH |
2694 | }; |
2695 | ||
2696 | /* This structure is used to pass information to | |
2697 | elf_link_find_version_dependencies. */ | |
2698 | ||
2699 | struct elf_find_verdep_info | |
2700 | { | |
2701 | /* Output BFD. */ | |
2702 | bfd *output_bfd; | |
2703 | /* General link information. */ | |
2704 | struct bfd_link_info *info; | |
2705 | /* The number of dependencies. */ | |
2706 | unsigned int vers; | |
2707 | /* Whether we had a failure. */ | |
b34976b6 | 2708 | bfd_boolean failed; |
252b5132 RH |
2709 | }; |
2710 | ||
2711 | /* Array used to determine the number of hash table buckets to use | |
2712 | based on the number of symbols there are. If there are fewer than | |
2713 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2714 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
2715 | than 32771 buckets. */ | |
2716 | ||
2717 | static const size_t elf_buckets[] = | |
2718 | { | |
2719 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
2720 | 16411, 32771, 0 | |
2721 | }; | |
2722 | ||
2723 | /* Compute bucket count for hashing table. We do not use a static set | |
2724 | of possible tables sizes anymore. Instead we determine for all | |
2725 | possible reasonable sizes of the table the outcome (i.e., the | |
2726 | number of collisions etc) and choose the best solution. The | |
2727 | weighting functions are not too simple to allow the table to grow | |
2728 | without bounds. Instead one of the weighting factors is the size. | |
2729 | Therefore the result is always a good payoff between few collisions | |
2730 | (= short chain lengths) and table size. */ | |
2731 | static size_t | |
2732 | compute_bucket_count (info) | |
2733 | struct bfd_link_info *info; | |
2734 | { | |
2735 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; | |
7442e600 | 2736 | size_t best_size = 0; |
252b5132 RH |
2737 | unsigned long int *hashcodes; |
2738 | unsigned long int *hashcodesp; | |
2739 | unsigned long int i; | |
dc810e39 | 2740 | bfd_size_type amt; |
252b5132 RH |
2741 | |
2742 | /* Compute the hash values for all exported symbols. At the same | |
2743 | time store the values in an array so that we could use them for | |
2744 | optimizations. */ | |
dc810e39 AM |
2745 | amt = dynsymcount; |
2746 | amt *= sizeof (unsigned long int); | |
2747 | hashcodes = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2748 | if (hashcodes == NULL) |
2749 | return 0; | |
2750 | hashcodesp = hashcodes; | |
2751 | ||
2752 | /* Put all hash values in HASHCODES. */ | |
2753 | elf_link_hash_traverse (elf_hash_table (info), | |
2754 | elf_collect_hash_codes, &hashcodesp); | |
2755 | ||
58821868 AM |
2756 | /* We have a problem here. The following code to optimize the table |
2757 | size requires an integer type with more the 32 bits. If | |
2758 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
252b5132 | 2759 | #ifdef BFD_HOST_U_64_BIT |
82e51918 | 2760 | if (info->optimize) |
252b5132 RH |
2761 | { |
2762 | unsigned long int nsyms = hashcodesp - hashcodes; | |
2763 | size_t minsize; | |
2764 | size_t maxsize; | |
2765 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
2766 | unsigned long int *counts ; | |
2767 | ||
2768 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
2769 | that the hashing table must at least have NSYMS/4 and at most | |
2770 | 2*NSYMS buckets. */ | |
2771 | minsize = nsyms / 4; | |
2772 | if (minsize == 0) | |
2773 | minsize = 1; | |
2774 | best_size = maxsize = nsyms * 2; | |
2775 | ||
2776 | /* Create array where we count the collisions in. We must use bfd_malloc | |
2777 | since the size could be large. */ | |
dc810e39 AM |
2778 | amt = maxsize; |
2779 | amt *= sizeof (unsigned long int); | |
2780 | counts = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2781 | if (counts == NULL) |
2782 | { | |
2783 | free (hashcodes); | |
2784 | return 0; | |
2785 | } | |
2786 | ||
2787 | /* Compute the "optimal" size for the hash table. The criteria is a | |
2788 | minimal chain length. The minor criteria is (of course) the size | |
2789 | of the table. */ | |
2790 | for (i = minsize; i < maxsize; ++i) | |
2791 | { | |
2792 | /* Walk through the array of hashcodes and count the collisions. */ | |
2793 | BFD_HOST_U_64_BIT max; | |
2794 | unsigned long int j; | |
2795 | unsigned long int fact; | |
2796 | ||
2797 | memset (counts, '\0', i * sizeof (unsigned long int)); | |
2798 | ||
2799 | /* Determine how often each hash bucket is used. */ | |
2800 | for (j = 0; j < nsyms; ++j) | |
2801 | ++counts[hashcodes[j] % i]; | |
2802 | ||
2803 | /* For the weight function we need some information about the | |
2804 | pagesize on the target. This is information need not be 100% | |
2805 | accurate. Since this information is not available (so far) we | |
2806 | define it here to a reasonable default value. If it is crucial | |
2807 | to have a better value some day simply define this value. */ | |
2808 | # ifndef BFD_TARGET_PAGESIZE | |
2809 | # define BFD_TARGET_PAGESIZE (4096) | |
2810 | # endif | |
2811 | ||
2812 | /* We in any case need 2 + NSYMS entries for the size values and | |
2813 | the chains. */ | |
2814 | max = (2 + nsyms) * (ARCH_SIZE / 8); | |
2815 | ||
2816 | # if 1 | |
2817 | /* Variant 1: optimize for short chains. We add the squares | |
2818 | of all the chain lengths (which favous many small chain | |
2819 | over a few long chains). */ | |
2820 | for (j = 0; j < i; ++j) | |
2821 | max += counts[j] * counts[j]; | |
2822 | ||
2823 | /* This adds penalties for the overall size of the table. */ | |
2824 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2825 | max *= fact * fact; | |
2826 | # else | |
2827 | /* Variant 2: Optimize a lot more for small table. Here we | |
2828 | also add squares of the size but we also add penalties for | |
2829 | empty slots (the +1 term). */ | |
2830 | for (j = 0; j < i; ++j) | |
2831 | max += (1 + counts[j]) * (1 + counts[j]); | |
2832 | ||
2833 | /* The overall size of the table is considered, but not as | |
2834 | strong as in variant 1, where it is squared. */ | |
2835 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2836 | max *= fact; | |
2837 | # endif | |
2838 | ||
2839 | /* Compare with current best results. */ | |
2840 | if (max < best_chlen) | |
2841 | { | |
2842 | best_chlen = max; | |
2843 | best_size = i; | |
2844 | } | |
2845 | } | |
2846 | ||
2847 | free (counts); | |
2848 | } | |
2849 | else | |
2850 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
2851 | { | |
2852 | /* This is the fallback solution if no 64bit type is available or if we | |
2853 | are not supposed to spend much time on optimizations. We select the | |
2854 | bucket count using a fixed set of numbers. */ | |
2855 | for (i = 0; elf_buckets[i] != 0; i++) | |
2856 | { | |
2857 | best_size = elf_buckets[i]; | |
2858 | if (dynsymcount < elf_buckets[i + 1]) | |
2859 | break; | |
2860 | } | |
2861 | } | |
2862 | ||
2863 | /* Free the arrays we needed. */ | |
2864 | free (hashcodes); | |
2865 | ||
2866 | return best_size; | |
2867 | } | |
2868 | ||
2869 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2870 | called by the ELF linker emulation before_allocation routine. We | |
2871 | must set the sizes of the sections before the linker sets the | |
2872 | addresses of the various sections. */ | |
2873 | ||
b34976b6 | 2874 | bfd_boolean |
252b5132 | 2875 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, |
99293407 | 2876 | filter_shlib, |
252b5132 RH |
2877 | auxiliary_filters, info, sinterpptr, |
2878 | verdefs) | |
2879 | bfd *output_bfd; | |
2880 | const char *soname; | |
2881 | const char *rpath; | |
252b5132 RH |
2882 | const char *filter_shlib; |
2883 | const char * const *auxiliary_filters; | |
2884 | struct bfd_link_info *info; | |
2885 | asection **sinterpptr; | |
2886 | struct bfd_elf_version_tree *verdefs; | |
2887 | { | |
2888 | bfd_size_type soname_indx; | |
25e27870 | 2889 | bfd *dynobj; |
252b5132 | 2890 | struct elf_backend_data *bed; |
252b5132 RH |
2891 | struct elf_assign_sym_version_info asvinfo; |
2892 | ||
2893 | *sinterpptr = NULL; | |
2894 | ||
2895 | soname_indx = (bfd_size_type) -1; | |
2896 | ||
2897 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2898 | return TRUE; |
252b5132 | 2899 | |
8ea2e4bd | 2900 | if (! is_elf_hash_table (info)) |
b34976b6 | 2901 | return TRUE; |
8ea2e4bd | 2902 | |
51b64d56 AM |
2903 | /* Any syms created from now on start with -1 in |
2904 | got.refcount/offset and plt.refcount/offset. */ | |
5cab59f6 | 2905 | elf_hash_table (info)->init_refcount = elf_hash_table (info)->init_offset; |
51b64d56 | 2906 | |
252b5132 RH |
2907 | /* The backend may have to create some sections regardless of whether |
2908 | we're dynamic or not. */ | |
2909 | bed = get_elf_backend_data (output_bfd); | |
2910 | if (bed->elf_backend_always_size_sections | |
2911 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
b34976b6 | 2912 | return FALSE; |
252b5132 RH |
2913 | |
2914 | dynobj = elf_hash_table (info)->dynobj; | |
2915 | ||
2916 | /* If there were no dynamic objects in the link, there is nothing to | |
2917 | do here. */ | |
2918 | if (dynobj == NULL) | |
b34976b6 | 2919 | return TRUE; |
252b5132 | 2920 | |
68f69152 | 2921 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
b34976b6 | 2922 | return FALSE; |
68f69152 | 2923 | |
252b5132 RH |
2924 | if (elf_hash_table (info)->dynamic_sections_created) |
2925 | { | |
2926 | struct elf_info_failed eif; | |
2927 | struct elf_link_hash_entry *h; | |
fc8c40a0 | 2928 | asection *dynstr; |
31941635 L |
2929 | struct bfd_elf_version_tree *t; |
2930 | struct bfd_elf_version_expr *d; | |
b34976b6 | 2931 | bfd_boolean all_defined; |
252b5132 RH |
2932 | |
2933 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
2934 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
2935 | ||
2936 | if (soname != NULL) | |
2937 | { | |
2b0f7ef9 | 2938 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 2939 | soname, TRUE); |
252b5132 | 2940 | if (soname_indx == (bfd_size_type) -1 |
dc810e39 AM |
2941 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SONAME, |
2942 | soname_indx)) | |
b34976b6 | 2943 | return FALSE; |
252b5132 RH |
2944 | } |
2945 | ||
2946 | if (info->symbolic) | |
2947 | { | |
dc810e39 AM |
2948 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMBOLIC, |
2949 | (bfd_vma) 0)) | |
b34976b6 | 2950 | return FALSE; |
d6cf2879 | 2951 | info->flags |= DF_SYMBOLIC; |
252b5132 RH |
2952 | } |
2953 | ||
2954 | if (rpath != NULL) | |
2955 | { | |
2956 | bfd_size_type indx; | |
2957 | ||
2b0f7ef9 | 2958 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, |
b34976b6 | 2959 | TRUE); |
2b0f7ef9 JJ |
2960 | if (info->new_dtags) |
2961 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
252b5132 | 2962 | if (indx == (bfd_size_type) -1 |
dc810e39 | 2963 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_RPATH, indx) |
c25373b7 | 2964 | || (info->new_dtags |
dc810e39 AM |
2965 | && ! elf_add_dynamic_entry (info, (bfd_vma) DT_RUNPATH, |
2966 | indx))) | |
b34976b6 | 2967 | return FALSE; |
252b5132 RH |
2968 | } |
2969 | ||
2970 | if (filter_shlib != NULL) | |
2971 | { | |
2972 | bfd_size_type indx; | |
2973 | ||
2b0f7ef9 | 2974 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 2975 | filter_shlib, TRUE); |
252b5132 | 2976 | if (indx == (bfd_size_type) -1 |
dc810e39 | 2977 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_FILTER, indx)) |
b34976b6 | 2978 | return FALSE; |
252b5132 RH |
2979 | } |
2980 | ||
2981 | if (auxiliary_filters != NULL) | |
2982 | { | |
2983 | const char * const *p; | |
2984 | ||
2985 | for (p = auxiliary_filters; *p != NULL; p++) | |
2986 | { | |
2987 | bfd_size_type indx; | |
2988 | ||
2b0f7ef9 | 2989 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 2990 | *p, TRUE); |
252b5132 | 2991 | if (indx == (bfd_size_type) -1 |
dc810e39 AM |
2992 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_AUXILIARY, |
2993 | indx)) | |
b34976b6 | 2994 | return FALSE; |
252b5132 RH |
2995 | } |
2996 | } | |
2997 | ||
391a809a | 2998 | eif.info = info; |
bc2b6df7 | 2999 | eif.verdefs = verdefs; |
b34976b6 | 3000 | eif.failed = FALSE; |
391a809a | 3001 | |
ea44b734 | 3002 | /* If we are supposed to export all symbols into the dynamic symbol |
c44233aa | 3003 | table (this is not the normal case), then do so. */ |
99293407 | 3004 | if (info->export_dynamic) |
ea44b734 | 3005 | { |
ea44b734 | 3006 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, |
c44233aa | 3007 | (PTR) &eif); |
ea44b734 | 3008 | if (eif.failed) |
b34976b6 | 3009 | return FALSE; |
ea44b734 RH |
3010 | } |
3011 | ||
31941635 L |
3012 | /* Make all global versions with definiton. */ |
3013 | for (t = verdefs; t != NULL; t = t->next) | |
3014 | for (d = t->globals; d != NULL; d = d->next) | |
3015 | if (!d->symver && strchr (d->pattern, '*') == NULL) | |
3016 | { | |
3017 | const char *verstr, *name; | |
3018 | size_t namelen, verlen, newlen; | |
3019 | char *newname, *p; | |
3020 | struct elf_link_hash_entry *newh; | |
3021 | ||
3022 | name = d->pattern; | |
3023 | namelen = strlen (name); | |
3024 | verstr = t->name; | |
3025 | verlen = strlen (verstr); | |
b34976b6 | 3026 | newlen = namelen + verlen + 3; |
31941635 L |
3027 | |
3028 | newname = (char *) bfd_malloc ((bfd_size_type) newlen); | |
3029 | if (newname == NULL) | |
b34976b6 | 3030 | return FALSE; |
31941635 L |
3031 | memcpy (newname, name, namelen); |
3032 | ||
3033 | /* Check the hidden versioned definition. */ | |
3034 | p = newname + namelen; | |
3035 | *p++ = ELF_VER_CHR; | |
3036 | memcpy (p, verstr, verlen + 1); | |
3037 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3038 | newname, FALSE, FALSE, |
3039 | FALSE); | |
31941635 L |
3040 | if (newh == NULL |
3041 | || (newh->root.type != bfd_link_hash_defined | |
3042 | && newh->root.type != bfd_link_hash_defweak)) | |
3043 | { | |
3044 | /* Check the default versioned definition. */ | |
3045 | *p++ = ELF_VER_CHR; | |
3046 | memcpy (p, verstr, verlen + 1); | |
3047 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3048 | newname, FALSE, FALSE, |
3049 | FALSE); | |
31941635 L |
3050 | } |
3051 | free (newname); | |
3052 | ||
c828c771 L |
3053 | /* Mark this version if there is a definition and it is |
3054 | not defined in a shared object. */ | |
31941635 | 3055 | if (newh != NULL |
c828c771 L |
3056 | && ((newh->elf_link_hash_flags |
3057 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0) | |
31941635 L |
3058 | && (newh->root.type == bfd_link_hash_defined |
3059 | || newh->root.type == bfd_link_hash_defweak)) | |
3060 | d->symver = 1; | |
3061 | } | |
3062 | ||
252b5132 RH |
3063 | /* Attach all the symbols to their version information. */ |
3064 | asvinfo.output_bfd = output_bfd; | |
3065 | asvinfo.info = info; | |
3066 | asvinfo.verdefs = verdefs; | |
b34976b6 | 3067 | asvinfo.failed = FALSE; |
252b5132 RH |
3068 | |
3069 | elf_link_hash_traverse (elf_hash_table (info), | |
3070 | elf_link_assign_sym_version, | |
3071 | (PTR) &asvinfo); | |
3072 | if (asvinfo.failed) | |
b34976b6 | 3073 | return FALSE; |
252b5132 | 3074 | |
31941635 L |
3075 | if (!info->allow_undefined_version) |
3076 | { | |
3077 | /* Check if all global versions have a definiton. */ | |
b34976b6 | 3078 | all_defined = TRUE; |
31941635 L |
3079 | for (t = verdefs; t != NULL; t = t->next) |
3080 | for (d = t->globals; d != NULL; d = d->next) | |
3081 | if (!d->symver && !d->script | |
3082 | && strchr (d->pattern, '*') == NULL) | |
3083 | { | |
3084 | (*_bfd_error_handler) | |
3085 | (_("%s: undefined version: %s"), | |
3086 | d->pattern, t->name); | |
b34976b6 | 3087 | all_defined = FALSE; |
31941635 L |
3088 | } |
3089 | ||
3090 | if (!all_defined) | |
3091 | { | |
3092 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3093 | return FALSE; |
31941635 L |
3094 | } |
3095 | } | |
3096 | ||
252b5132 RH |
3097 | /* Find all symbols which were defined in a dynamic object and make |
3098 | the backend pick a reasonable value for them. */ | |
252b5132 RH |
3099 | elf_link_hash_traverse (elf_hash_table (info), |
3100 | elf_adjust_dynamic_symbol, | |
3101 | (PTR) &eif); | |
3102 | if (eif.failed) | |
b34976b6 | 3103 | return FALSE; |
252b5132 RH |
3104 | |
3105 | /* Add some entries to the .dynamic section. We fill in some of the | |
3106 | values later, in elf_bfd_final_link, but we must add the entries | |
3107 | now so that we know the final size of the .dynamic section. */ | |
f0c2e336 MM |
3108 | |
3109 | /* If there are initialization and/or finalization functions to | |
3110 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
3111 | h = (info->init_function | |
3e932841 | 3112 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3113 | info->init_function, FALSE, |
3114 | FALSE, FALSE) | |
f0c2e336 | 3115 | : NULL); |
252b5132 RH |
3116 | if (h != NULL |
3117 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3118 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3119 | { | |
dc810e39 | 3120 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_INIT, (bfd_vma) 0)) |
b34976b6 | 3121 | return FALSE; |
252b5132 | 3122 | } |
f0c2e336 | 3123 | h = (info->fini_function |
3e932841 | 3124 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3125 | info->fini_function, FALSE, |
3126 | FALSE, FALSE) | |
f0c2e336 | 3127 | : NULL); |
252b5132 RH |
3128 | if (h != NULL |
3129 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3130 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3131 | { | |
dc810e39 | 3132 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FINI, (bfd_vma) 0)) |
b34976b6 | 3133 | return FALSE; |
252b5132 | 3134 | } |
f0c2e336 | 3135 | |
fa7ea4d8 AM |
3136 | if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL) |
3137 | { | |
3138 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
3139 | if (info->shared) | |
3140 | { | |
3141 | bfd *sub; | |
3142 | asection *o; | |
3143 | ||
3144 | for (sub = info->input_bfds; sub != NULL; | |
3145 | sub = sub->link_next) | |
3146 | for (o = sub->sections; o != NULL; o = o->next) | |
3147 | if (elf_section_data (o)->this_hdr.sh_type | |
3148 | == SHT_PREINIT_ARRAY) | |
3149 | { | |
3150 | (*_bfd_error_handler) | |
3151 | (_("%s: .preinit_array section is not allowed in DSO"), | |
58821868 | 3152 | bfd_archive_filename (sub)); |
fa7ea4d8 AM |
3153 | break; |
3154 | } | |
60166579 | 3155 | |
36b4f6e7 | 3156 | bfd_set_error (bfd_error_nonrepresentable_section); |
b34976b6 | 3157 | return FALSE; |
fa7ea4d8 AM |
3158 | } |
3159 | ||
3160 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAY, | |
3161 | (bfd_vma) 0) | |
3162 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAYSZ, | |
3163 | (bfd_vma) 0)) | |
b34976b6 | 3164 | return FALSE; |
fa7ea4d8 AM |
3165 | } |
3166 | if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL) | |
3167 | { | |
3168 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAY, | |
3169 | (bfd_vma) 0) | |
3170 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAYSZ, | |
3171 | (bfd_vma) 0)) | |
b34976b6 | 3172 | return FALSE; |
fa7ea4d8 AM |
3173 | } |
3174 | if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL) | |
3175 | { | |
3176 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAY, | |
3177 | (bfd_vma) 0) | |
3178 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAYSZ, | |
3179 | (bfd_vma) 0)) | |
b34976b6 | 3180 | return FALSE; |
fa7ea4d8 | 3181 | } |
30831527 | 3182 | |
fc8c40a0 AM |
3183 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); |
3184 | /* If .dynstr is excluded from the link, we don't want any of | |
3185 | these tags. Strictly, we should be checking each section | |
3186 | individually; This quick check covers for the case where | |
3187 | someone does a /DISCARD/ : { *(*) }. */ | |
3188 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
3189 | { | |
3190 | bfd_size_type strsize; | |
3191 | ||
2b0f7ef9 | 3192 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
dc810e39 AM |
3193 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_HASH, (bfd_vma) 0) |
3194 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRTAB, (bfd_vma) 0) | |
3195 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMTAB, (bfd_vma) 0) | |
3196 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRSZ, strsize) | |
3197 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMENT, | |
3198 | (bfd_vma) sizeof (Elf_External_Sym))) | |
b34976b6 | 3199 | return FALSE; |
fc8c40a0 | 3200 | } |
252b5132 RH |
3201 | } |
3202 | ||
3203 | /* The backend must work out the sizes of all the other dynamic | |
3204 | sections. */ | |
252b5132 RH |
3205 | if (bed->elf_backend_size_dynamic_sections |
3206 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
b34976b6 | 3207 | return FALSE; |
252b5132 RH |
3208 | |
3209 | if (elf_hash_table (info)->dynamic_sections_created) | |
3210 | { | |
dc810e39 | 3211 | bfd_size_type dynsymcount; |
252b5132 RH |
3212 | asection *s; |
3213 | size_t bucketcount = 0; | |
c7ac6ff8 | 3214 | size_t hash_entry_size; |
db6751f2 | 3215 | unsigned int dtagcount; |
252b5132 RH |
3216 | |
3217 | /* Set up the version definition section. */ | |
3218 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
3219 | BFD_ASSERT (s != NULL); | |
3220 | ||
3221 | /* We may have created additional version definitions if we are | |
c44233aa | 3222 | just linking a regular application. */ |
252b5132 RH |
3223 | verdefs = asvinfo.verdefs; |
3224 | ||
6b9b879a JJ |
3225 | /* Skip anonymous version tag. */ |
3226 | if (verdefs != NULL && verdefs->vernum == 0) | |
3227 | verdefs = verdefs->next; | |
3228 | ||
252b5132 | 3229 | if (verdefs == NULL) |
7f8d5fc9 | 3230 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3231 | else |
3232 | { | |
3233 | unsigned int cdefs; | |
3234 | bfd_size_type size; | |
3235 | struct bfd_elf_version_tree *t; | |
3236 | bfd_byte *p; | |
3237 | Elf_Internal_Verdef def; | |
3238 | Elf_Internal_Verdaux defaux; | |
3239 | ||
252b5132 RH |
3240 | cdefs = 0; |
3241 | size = 0; | |
3242 | ||
3243 | /* Make space for the base version. */ | |
3244 | size += sizeof (Elf_External_Verdef); | |
3245 | size += sizeof (Elf_External_Verdaux); | |
3246 | ++cdefs; | |
3247 | ||
3248 | for (t = verdefs; t != NULL; t = t->next) | |
3249 | { | |
3250 | struct bfd_elf_version_deps *n; | |
3251 | ||
3252 | size += sizeof (Elf_External_Verdef); | |
3253 | size += sizeof (Elf_External_Verdaux); | |
3254 | ++cdefs; | |
3255 | ||
3256 | for (n = t->deps; n != NULL; n = n->next) | |
3257 | size += sizeof (Elf_External_Verdaux); | |
3258 | } | |
3259 | ||
3260 | s->_raw_size = size; | |
3261 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3262 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3263 | return FALSE; |
252b5132 RH |
3264 | |
3265 | /* Fill in the version definition section. */ | |
3266 | ||
3267 | p = s->contents; | |
3268 | ||
3269 | def.vd_version = VER_DEF_CURRENT; | |
3270 | def.vd_flags = VER_FLG_BASE; | |
3271 | def.vd_ndx = 1; | |
3272 | def.vd_cnt = 1; | |
3273 | def.vd_aux = sizeof (Elf_External_Verdef); | |
3274 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3275 | + sizeof (Elf_External_Verdaux)); | |
3276 | ||
3277 | if (soname_indx != (bfd_size_type) -1) | |
3278 | { | |
2b0f7ef9 JJ |
3279 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3280 | soname_indx); | |
3a99b017 | 3281 | def.vd_hash = bfd_elf_hash (soname); |
252b5132 RH |
3282 | defaux.vda_name = soname_indx; |
3283 | } | |
3284 | else | |
3285 | { | |
3286 | const char *name; | |
3287 | bfd_size_type indx; | |
3288 | ||
96fd004e | 3289 | name = basename (output_bfd->filename); |
3a99b017 | 3290 | def.vd_hash = bfd_elf_hash (name); |
2b0f7ef9 | 3291 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3292 | name, FALSE); |
252b5132 | 3293 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3294 | return FALSE; |
252b5132 RH |
3295 | defaux.vda_name = indx; |
3296 | } | |
3297 | defaux.vda_next = 0; | |
3298 | ||
3299 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
a7b97311 | 3300 | (Elf_External_Verdef *) p); |
252b5132 RH |
3301 | p += sizeof (Elf_External_Verdef); |
3302 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3303 | (Elf_External_Verdaux *) p); | |
3304 | p += sizeof (Elf_External_Verdaux); | |
3305 | ||
3306 | for (t = verdefs; t != NULL; t = t->next) | |
3307 | { | |
3308 | unsigned int cdeps; | |
3309 | struct bfd_elf_version_deps *n; | |
3310 | struct elf_link_hash_entry *h; | |
14a793b2 | 3311 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
3312 | |
3313 | cdeps = 0; | |
3314 | for (n = t->deps; n != NULL; n = n->next) | |
3315 | ++cdeps; | |
3316 | ||
3317 | /* Add a symbol representing this version. */ | |
14a793b2 | 3318 | bh = NULL; |
252b5132 RH |
3319 | if (! (_bfd_generic_link_add_one_symbol |
3320 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
b34976b6 | 3321 | (bfd_vma) 0, (const char *) NULL, FALSE, |
14a793b2 | 3322 | get_elf_backend_data (dynobj)->collect, &bh))) |
b34976b6 | 3323 | return FALSE; |
14a793b2 | 3324 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
3325 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; |
3326 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3327 | h->type = STT_OBJECT; | |
3328 | h->verinfo.vertree = t; | |
3329 | ||
3330 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 3331 | return FALSE; |
252b5132 RH |
3332 | |
3333 | def.vd_version = VER_DEF_CURRENT; | |
3334 | def.vd_flags = 0; | |
3335 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
3336 | def.vd_flags |= VER_FLG_WEAK; | |
3337 | def.vd_ndx = t->vernum + 1; | |
3338 | def.vd_cnt = cdeps + 1; | |
3a99b017 | 3339 | def.vd_hash = bfd_elf_hash (t->name); |
252b5132 RH |
3340 | def.vd_aux = sizeof (Elf_External_Verdef); |
3341 | if (t->next != NULL) | |
3342 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3343 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
3344 | else | |
3345 | def.vd_next = 0; | |
3346 | ||
3347 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
3348 | (Elf_External_Verdef *) p); | |
3349 | p += sizeof (Elf_External_Verdef); | |
3350 | ||
3351 | defaux.vda_name = h->dynstr_index; | |
2b0f7ef9 JJ |
3352 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3353 | h->dynstr_index); | |
252b5132 RH |
3354 | if (t->deps == NULL) |
3355 | defaux.vda_next = 0; | |
3356 | else | |
3357 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3358 | t->name_indx = defaux.vda_name; | |
3359 | ||
3360 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3361 | (Elf_External_Verdaux *) p); | |
3362 | p += sizeof (Elf_External_Verdaux); | |
3363 | ||
3364 | for (n = t->deps; n != NULL; n = n->next) | |
3365 | { | |
3366 | if (n->version_needed == NULL) | |
3367 | { | |
3368 | /* This can happen if there was an error in the | |
3369 | version script. */ | |
3370 | defaux.vda_name = 0; | |
3371 | } | |
3372 | else | |
2b0f7ef9 JJ |
3373 | { |
3374 | defaux.vda_name = n->version_needed->name_indx; | |
3375 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
3376 | defaux.vda_name); | |
3377 | } | |
252b5132 RH |
3378 | if (n->next == NULL) |
3379 | defaux.vda_next = 0; | |
3380 | else | |
3381 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3382 | ||
3383 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3384 | (Elf_External_Verdaux *) p); | |
3385 | p += sizeof (Elf_External_Verdaux); | |
3386 | } | |
3387 | } | |
3388 | ||
dc810e39 AM |
3389 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEF, (bfd_vma) 0) |
3390 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEFNUM, | |
3391 | (bfd_vma) cdefs)) | |
b34976b6 | 3392 | return FALSE; |
252b5132 RH |
3393 | |
3394 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
3395 | } | |
3396 | ||
13ae64f3 | 3397 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) |
d6cf2879 | 3398 | { |
dc810e39 | 3399 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS, info->flags)) |
b34976b6 | 3400 | return FALSE; |
d6cf2879 L |
3401 | } |
3402 | ||
4d538889 | 3403 | if (info->flags_1) |
d6cf2879 L |
3404 | { |
3405 | if (! info->shared) | |
3406 | info->flags_1 &= ~ (DF_1_INITFIRST | |
3407 | | DF_1_NODELETE | |
3408 | | DF_1_NOOPEN); | |
dc810e39 AM |
3409 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS_1, |
3410 | info->flags_1)) | |
b34976b6 | 3411 | return FALSE; |
d6cf2879 L |
3412 | } |
3413 | ||
252b5132 RH |
3414 | /* Work out the size of the version reference section. */ |
3415 | ||
3416 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
3417 | BFD_ASSERT (s != NULL); | |
3418 | { | |
3419 | struct elf_find_verdep_info sinfo; | |
3420 | ||
3421 | sinfo.output_bfd = output_bfd; | |
3422 | sinfo.info = info; | |
3423 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
3424 | if (sinfo.vers == 0) | |
3425 | sinfo.vers = 1; | |
b34976b6 | 3426 | sinfo.failed = FALSE; |
252b5132 RH |
3427 | |
3428 | elf_link_hash_traverse (elf_hash_table (info), | |
3429 | elf_link_find_version_dependencies, | |
3430 | (PTR) &sinfo); | |
3431 | ||
3432 | if (elf_tdata (output_bfd)->verref == NULL) | |
7f8d5fc9 | 3433 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3434 | else |
3435 | { | |
3436 | Elf_Internal_Verneed *t; | |
3437 | unsigned int size; | |
3438 | unsigned int crefs; | |
3439 | bfd_byte *p; | |
3440 | ||
3441 | /* Build the version definition section. */ | |
3442 | size = 0; | |
3443 | crefs = 0; | |
3444 | for (t = elf_tdata (output_bfd)->verref; | |
3445 | t != NULL; | |
3446 | t = t->vn_nextref) | |
3447 | { | |
3448 | Elf_Internal_Vernaux *a; | |
3449 | ||
3450 | size += sizeof (Elf_External_Verneed); | |
3451 | ++crefs; | |
3452 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3453 | size += sizeof (Elf_External_Vernaux); | |
3454 | } | |
3455 | ||
3456 | s->_raw_size = size; | |
dc810e39 | 3457 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); |
252b5132 | 3458 | if (s->contents == NULL) |
b34976b6 | 3459 | return FALSE; |
252b5132 RH |
3460 | |
3461 | p = s->contents; | |
3462 | for (t = elf_tdata (output_bfd)->verref; | |
3463 | t != NULL; | |
3464 | t = t->vn_nextref) | |
3465 | { | |
3466 | unsigned int caux; | |
3467 | Elf_Internal_Vernaux *a; | |
3468 | bfd_size_type indx; | |
3469 | ||
3470 | caux = 0; | |
3471 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3472 | ++caux; | |
3473 | ||
3474 | t->vn_version = VER_NEED_CURRENT; | |
3475 | t->vn_cnt = caux; | |
2b0f7ef9 JJ |
3476 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3477 | elf_dt_name (t->vn_bfd) != NULL | |
3478 | ? elf_dt_name (t->vn_bfd) | |
3479 | : basename (t->vn_bfd->filename), | |
b34976b6 | 3480 | FALSE); |
252b5132 | 3481 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3482 | return FALSE; |
252b5132 RH |
3483 | t->vn_file = indx; |
3484 | t->vn_aux = sizeof (Elf_External_Verneed); | |
3485 | if (t->vn_nextref == NULL) | |
3486 | t->vn_next = 0; | |
3487 | else | |
3488 | t->vn_next = (sizeof (Elf_External_Verneed) | |
3489 | + caux * sizeof (Elf_External_Vernaux)); | |
3490 | ||
3491 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
3492 | (Elf_External_Verneed *) p); | |
3493 | p += sizeof (Elf_External_Verneed); | |
3494 | ||
3495 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3496 | { | |
3a99b017 | 3497 | a->vna_hash = bfd_elf_hash (a->vna_nodename); |
2b0f7ef9 | 3498 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3499 | a->vna_nodename, FALSE); |
252b5132 | 3500 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3501 | return FALSE; |
252b5132 RH |
3502 | a->vna_name = indx; |
3503 | if (a->vna_nextptr == NULL) | |
3504 | a->vna_next = 0; | |
3505 | else | |
3506 | a->vna_next = sizeof (Elf_External_Vernaux); | |
3507 | ||
3508 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
3509 | (Elf_External_Vernaux *) p); | |
3510 | p += sizeof (Elf_External_Vernaux); | |
3511 | } | |
3512 | } | |
3513 | ||
dc810e39 AM |
3514 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEED, |
3515 | (bfd_vma) 0) | |
3516 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEEDNUM, | |
3517 | (bfd_vma) crefs)) | |
b34976b6 | 3518 | return FALSE; |
252b5132 RH |
3519 | |
3520 | elf_tdata (output_bfd)->cverrefs = crefs; | |
3521 | } | |
3522 | } | |
3523 | ||
3e932841 | 3524 | /* Assign dynsym indicies. In a shared library we generate a |
30b30c21 RH |
3525 | section symbol for each output section, which come first. |
3526 | Next come all of the back-end allocated local dynamic syms, | |
3527 | followed by the rest of the global symbols. */ | |
3528 | ||
3529 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); | |
252b5132 RH |
3530 | |
3531 | /* Work out the size of the symbol version section. */ | |
3532 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
3533 | BFD_ASSERT (s != NULL); | |
3534 | if (dynsymcount == 0 | |
3535 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
3536 | { | |
7f8d5fc9 | 3537 | _bfd_strip_section_from_output (info, s); |
42751cf3 MM |
3538 | /* The DYNSYMCOUNT might have changed if we were going to |
3539 | output a dynamic symbol table entry for S. */ | |
30b30c21 | 3540 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); |
252b5132 RH |
3541 | } |
3542 | else | |
3543 | { | |
3544 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); | |
3545 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); | |
3546 | if (s->contents == NULL) | |
b34976b6 | 3547 | return FALSE; |
252b5132 | 3548 | |
dc810e39 | 3549 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERSYM, (bfd_vma) 0)) |
b34976b6 | 3550 | return FALSE; |
252b5132 RH |
3551 | } |
3552 | ||
3553 | /* Set the size of the .dynsym and .hash sections. We counted | |
3554 | the number of dynamic symbols in elf_link_add_object_symbols. | |
3555 | We will build the contents of .dynsym and .hash when we build | |
3556 | the final symbol table, because until then we do not know the | |
3557 | correct value to give the symbols. We built the .dynstr | |
3558 | section as we went along in elf_link_add_object_symbols. */ | |
3559 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3560 | BFD_ASSERT (s != NULL); | |
3561 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
3562 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3563 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3564 | return FALSE; |
252b5132 | 3565 | |
fc8c40a0 AM |
3566 | if (dynsymcount != 0) |
3567 | { | |
3568 | Elf_Internal_Sym isym; | |
3569 | ||
3570 | /* The first entry in .dynsym is a dummy symbol. */ | |
3571 | isym.st_value = 0; | |
3572 | isym.st_size = 0; | |
3573 | isym.st_name = 0; | |
3574 | isym.st_info = 0; | |
3575 | isym.st_other = 0; | |
3576 | isym.st_shndx = 0; | |
9ad5cbcf | 3577 | elf_swap_symbol_out (output_bfd, &isym, (PTR) s->contents, (PTR) 0); |
fc8c40a0 | 3578 | } |
252b5132 RH |
3579 | |
3580 | /* Compute the size of the hashing table. As a side effect this | |
3581 | computes the hash values for all the names we export. */ | |
3582 | bucketcount = compute_bucket_count (info); | |
3583 | ||
3584 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
3585 | BFD_ASSERT (s != NULL); | |
c7ac6ff8 MM |
3586 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; |
3587 | s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
1126897b | 3588 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
252b5132 | 3589 | if (s->contents == NULL) |
b34976b6 | 3590 | return FALSE; |
252b5132 | 3591 | |
dc810e39 AM |
3592 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) bucketcount, |
3593 | s->contents); | |
3594 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) dynsymcount, | |
c7ac6ff8 | 3595 | s->contents + hash_entry_size); |
252b5132 RH |
3596 | |
3597 | elf_hash_table (info)->bucketcount = bucketcount; | |
3598 | ||
3599 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
3600 | BFD_ASSERT (s != NULL); | |
2b0f7ef9 JJ |
3601 | |
3602 | elf_finalize_dynstr (output_bfd, info); | |
3603 | ||
3604 | s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
252b5132 | 3605 | |
db6751f2 | 3606 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) |
dc810e39 | 3607 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NULL, (bfd_vma) 0)) |
b34976b6 | 3608 | return FALSE; |
252b5132 RH |
3609 | } |
3610 | ||
b34976b6 | 3611 | return TRUE; |
252b5132 RH |
3612 | } |
3613 | \f | |
2b0f7ef9 JJ |
3614 | /* This function is used to adjust offsets into .dynstr for |
3615 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
c44233aa | 3616 | |
b34976b6 AM |
3617 | static bfd_boolean elf_adjust_dynstr_offsets |
3618 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
c44233aa | 3619 | |
b34976b6 | 3620 | static bfd_boolean |
2b0f7ef9 JJ |
3621 | elf_adjust_dynstr_offsets (h, data) |
3622 | struct elf_link_hash_entry *h; | |
3623 | PTR data; | |
3624 | { | |
3625 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; | |
3626 | ||
e92d460e AM |
3627 | if (h->root.type == bfd_link_hash_warning) |
3628 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3629 | ||
2b0f7ef9 JJ |
3630 | if (h->dynindx != -1) |
3631 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
b34976b6 | 3632 | return TRUE; |
2b0f7ef9 JJ |
3633 | } |
3634 | ||
3635 | /* Assign string offsets in .dynstr, update all structures referencing | |
3636 | them. */ | |
3637 | ||
b34976b6 | 3638 | static bfd_boolean |
2b0f7ef9 JJ |
3639 | elf_finalize_dynstr (output_bfd, info) |
3640 | bfd *output_bfd; | |
3641 | struct bfd_link_info *info; | |
3642 | { | |
3643 | struct elf_link_local_dynamic_entry *entry; | |
3644 | struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr; | |
3645 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
3646 | asection *sdyn; | |
3647 | bfd_size_type size; | |
3648 | Elf_External_Dyn *dyncon, *dynconend; | |
3649 | ||
3650 | _bfd_elf_strtab_finalize (dynstr); | |
3651 | size = _bfd_elf_strtab_size (dynstr); | |
3652 | ||
3653 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3654 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3655 | BFD_ASSERT (sdyn != NULL); | |
3656 | ||
3657 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
3658 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
3659 | sdyn->_raw_size); | |
3660 | for (; dyncon < dynconend; dyncon++) | |
3661 | { | |
3662 | Elf_Internal_Dyn dyn; | |
3663 | ||
3664 | elf_swap_dyn_in (dynobj, dyncon, & dyn); | |
3665 | switch (dyn.d_tag) | |
3666 | { | |
3667 | case DT_STRSZ: | |
3668 | dyn.d_un.d_val = size; | |
3669 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3670 | break; | |
3671 | case DT_NEEDED: | |
3672 | case DT_SONAME: | |
3673 | case DT_RPATH: | |
3674 | case DT_RUNPATH: | |
3675 | case DT_FILTER: | |
3676 | case DT_AUXILIARY: | |
3677 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); | |
3678 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3679 | break; | |
3680 | default: | |
3681 | break; | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | /* Now update local dynamic symbols. */ | |
3686 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
3687 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3688 | entry->isym.st_name); | |
3689 | ||
3690 | /* And the rest of dynamic symbols. */ | |
3691 | elf_link_hash_traverse (elf_hash_table (info), | |
3692 | elf_adjust_dynstr_offsets, dynstr); | |
3693 | ||
3694 | /* Adjust version definitions. */ | |
3695 | if (elf_tdata (output_bfd)->cverdefs) | |
3696 | { | |
3697 | asection *s; | |
3698 | bfd_byte *p; | |
3699 | bfd_size_type i; | |
3700 | Elf_Internal_Verdef def; | |
3701 | Elf_Internal_Verdaux defaux; | |
c44233aa | 3702 | |
2b0f7ef9 JJ |
3703 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
3704 | p = (bfd_byte *) s->contents; | |
3705 | do | |
3706 | { | |
3707 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3708 | &def); | |
3709 | p += sizeof (Elf_External_Verdef); | |
3710 | for (i = 0; i < def.vd_cnt; ++i) | |
3711 | { | |
3712 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3713 | (Elf_External_Verdaux *) p, &defaux); | |
3714 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3715 | defaux.vda_name); | |
3716 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3717 | &defaux, (Elf_External_Verdaux *) p); | |
3718 | p += sizeof (Elf_External_Verdaux); | |
3719 | } | |
3720 | } | |
3721 | while (def.vd_next); | |
3722 | } | |
3723 | ||
3724 | /* Adjust version references. */ | |
3725 | if (elf_tdata (output_bfd)->verref) | |
3726 | { | |
3727 | asection *s; | |
3728 | bfd_byte *p; | |
3729 | bfd_size_type i; | |
3730 | Elf_Internal_Verneed need; | |
3731 | Elf_Internal_Vernaux needaux; | |
c44233aa | 3732 | |
2b0f7ef9 JJ |
3733 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
3734 | p = (bfd_byte *) s->contents; | |
3735 | do | |
3736 | { | |
3737 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3738 | &need); | |
3739 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3740 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3741 | (Elf_External_Verneed *) p); | |
3742 | p += sizeof (Elf_External_Verneed); | |
3743 | for (i = 0; i < need.vn_cnt; ++i) | |
3744 | { | |
3745 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3746 | (Elf_External_Vernaux *) p, &needaux); | |
3747 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3748 | needaux.vna_name); | |
3749 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3750 | &needaux, | |
3751 | (Elf_External_Vernaux *) p); | |
3752 | p += sizeof (Elf_External_Vernaux); | |
3753 | } | |
3754 | } | |
3755 | while (need.vn_next); | |
3756 | } | |
3757 | ||
b34976b6 | 3758 | return TRUE; |
2b0f7ef9 JJ |
3759 | } |
3760 | ||
252b5132 RH |
3761 | /* Fix up the flags for a symbol. This handles various cases which |
3762 | can only be fixed after all the input files are seen. This is | |
3763 | currently called by both adjust_dynamic_symbol and | |
3764 | assign_sym_version, which is unnecessary but perhaps more robust in | |
3765 | the face of future changes. */ | |
3766 | ||
b34976b6 | 3767 | static bfd_boolean |
252b5132 RH |
3768 | elf_fix_symbol_flags (h, eif) |
3769 | struct elf_link_hash_entry *h; | |
3770 | struct elf_info_failed *eif; | |
3771 | { | |
3772 | /* If this symbol was mentioned in a non-ELF file, try to set | |
3773 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
3774 | permit a non-ELF file to correctly refer to a symbol defined in | |
3775 | an ELF dynamic object. */ | |
3776 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
3777 | { | |
94b6c40a L |
3778 | while (h->root.type == bfd_link_hash_indirect) |
3779 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3780 | ||
252b5132 RH |
3781 | if (h->root.type != bfd_link_hash_defined |
3782 | && h->root.type != bfd_link_hash_defweak) | |
3783 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3784 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3785 | else | |
3786 | { | |
3787 | if (h->root.u.def.section->owner != NULL | |
3788 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
3789 | == bfd_target_elf_flavour)) | |
3790 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3791 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3792 | else | |
3793 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3794 | } | |
3795 | ||
3796 | if (h->dynindx == -1 | |
3797 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3798 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
3799 | { | |
3800 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3801 | { | |
b34976b6 AM |
3802 | eif->failed = TRUE; |
3803 | return FALSE; | |
252b5132 RH |
3804 | } |
3805 | } | |
3806 | } | |
3807 | else | |
3808 | { | |
3809 | /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol | |
c44233aa AM |
3810 | was first seen in a non-ELF file. Fortunately, if the symbol |
3811 | was first seen in an ELF file, we're probably OK unless the | |
3812 | symbol was defined in a non-ELF file. Catch that case here. | |
3813 | FIXME: We're still in trouble if the symbol was first seen in | |
3814 | a dynamic object, and then later in a non-ELF regular object. */ | |
252b5132 RH |
3815 | if ((h->root.type == bfd_link_hash_defined |
3816 | || h->root.type == bfd_link_hash_defweak) | |
3817 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3818 | && (h->root.u.def.section->owner != NULL | |
3819 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
3820 | != bfd_target_elf_flavour) | |
3821 | : (bfd_is_abs_section (h->root.u.def.section) | |
3822 | && (h->elf_link_hash_flags | |
3823 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0))) | |
3824 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3825 | } | |
3826 | ||
3827 | /* If this is a final link, and the symbol was defined as a common | |
3828 | symbol in a regular object file, and there was no definition in | |
3829 | any dynamic object, then the linker will have allocated space for | |
3830 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
3831 | flag will not have been set. */ | |
3832 | if (h->root.type == bfd_link_hash_defined | |
3833 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3834 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3835 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3836 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
3837 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3838 | ||
3839 | /* If -Bsymbolic was used (which means to bind references to global | |
3840 | symbols to the definition within the shared object), and this | |
3841 | symbol was defined in a regular object, then it actually doesn't | |
d954b040 HPN |
3842 | need a PLT entry, and we can accomplish that by forcing it local. |
3843 | Likewise, if the symbol has hidden or internal visibility. | |
3844 | FIXME: It might be that we also do not need a PLT for other | |
3845 | non-hidden visibilities, but we would have to tell that to the | |
3846 | backend specifically; we can't just clear PLT-related data here. */ | |
252b5132 RH |
3847 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
3848 | && eif->info->shared | |
8ea2e4bd | 3849 | && is_elf_hash_table (eif->info) |
d954b040 HPN |
3850 | && (eif->info->symbolic |
3851 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3852 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
252b5132 RH |
3853 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
3854 | { | |
391a809a | 3855 | struct elf_backend_data *bed; |
b34976b6 | 3856 | bfd_boolean force_local; |
8ea2e4bd | 3857 | |
391a809a | 3858 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
e5094212 AM |
3859 | |
3860 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3861 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
3862 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
252b5132 RH |
3863 | } |
3864 | ||
fc4cc5bb ILT |
3865 | /* If this is a weak defined symbol in a dynamic object, and we know |
3866 | the real definition in the dynamic object, copy interesting flags | |
3867 | over to the real definition. */ | |
3868 | if (h->weakdef != NULL) | |
3869 | { | |
3870 | struct elf_link_hash_entry *weakdef; | |
3871 | ||
8e67855b NC |
3872 | weakdef = h->weakdef; |
3873 | if (h->root.type == bfd_link_hash_indirect) | |
3874 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3875 | ||
fc4cc5bb ILT |
3876 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
3877 | || h->root.type == bfd_link_hash_defweak); | |
fc4cc5bb ILT |
3878 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
3879 | || weakdef->root.type == bfd_link_hash_defweak); | |
3880 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
3881 | ||
3882 | /* If the real definition is defined by a regular object file, | |
3883 | don't do anything special. See the longer description in | |
3884 | elf_adjust_dynamic_symbol, below. */ | |
3885 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
3886 | h->weakdef = NULL; | |
3887 | else | |
0a991dfe AM |
3888 | { |
3889 | struct elf_backend_data *bed; | |
3890 | ||
3891 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); | |
b48fa14c | 3892 | (*bed->elf_backend_copy_indirect_symbol) (bed, weakdef, h); |
0a991dfe | 3893 | } |
fc4cc5bb ILT |
3894 | } |
3895 | ||
b34976b6 | 3896 | return TRUE; |
252b5132 RH |
3897 | } |
3898 | ||
3899 | /* Make the backend pick a good value for a dynamic symbol. This is | |
3900 | called via elf_link_hash_traverse, and also calls itself | |
3901 | recursively. */ | |
3902 | ||
b34976b6 | 3903 | static bfd_boolean |
252b5132 RH |
3904 | elf_adjust_dynamic_symbol (h, data) |
3905 | struct elf_link_hash_entry *h; | |
3906 | PTR data; | |
3907 | { | |
3908 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
3909 | bfd *dynobj; | |
3910 | struct elf_backend_data *bed; | |
3911 | ||
5cab59f6 AM |
3912 | if (! is_elf_hash_table (eif->info)) |
3913 | return FALSE; | |
3914 | ||
e92d460e AM |
3915 | if (h->root.type == bfd_link_hash_warning) |
3916 | { | |
5cab59f6 AM |
3917 | h->plt = elf_hash_table (eif->info)->init_offset; |
3918 | h->got = elf_hash_table (eif->info)->init_offset; | |
e92d460e AM |
3919 | |
3920 | /* When warning symbols are created, they **replace** the "real" | |
3921 | entry in the hash table, thus we never get to see the real | |
3922 | symbol in a hash traversal. So look at it now. */ | |
3923 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3924 | } | |
3925 | ||
252b5132 RH |
3926 | /* Ignore indirect symbols. These are added by the versioning code. */ |
3927 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 3928 | return TRUE; |
252b5132 RH |
3929 | |
3930 | /* Fix the symbol flags. */ | |
3931 | if (! elf_fix_symbol_flags (h, eif)) | |
b34976b6 | 3932 | return FALSE; |
252b5132 RH |
3933 | |
3934 | /* If this symbol does not require a PLT entry, and it is not | |
3935 | defined by a dynamic object, or is not referenced by a regular | |
3936 | object, ignore it. We do have to handle a weak defined symbol, | |
3937 | even if no regular object refers to it, if we decided to add it | |
3938 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
3939 | about symbols which are defined by one dynamic object and | |
3940 | referenced by another one? */ | |
3941 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 | |
3942 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
3943 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3944 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 | |
3945 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
3946 | { | |
5cab59f6 | 3947 | h->plt = elf_hash_table (eif->info)->init_offset; |
b34976b6 | 3948 | return TRUE; |
252b5132 RH |
3949 | } |
3950 | ||
3951 | /* If we've already adjusted this symbol, don't do it again. This | |
3952 | can happen via a recursive call. */ | |
3953 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
b34976b6 | 3954 | return TRUE; |
252b5132 RH |
3955 | |
3956 | /* Don't look at this symbol again. Note that we must set this | |
3957 | after checking the above conditions, because we may look at a | |
3958 | symbol once, decide not to do anything, and then get called | |
3959 | recursively later after REF_REGULAR is set below. */ | |
3960 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
3961 | ||
3962 | /* If this is a weak definition, and we know a real definition, and | |
3963 | the real symbol is not itself defined by a regular object file, | |
3964 | then get a good value for the real definition. We handle the | |
3965 | real symbol first, for the convenience of the backend routine. | |
3966 | ||
3967 | Note that there is a confusing case here. If the real definition | |
3968 | is defined by a regular object file, we don't get the real symbol | |
3969 | from the dynamic object, but we do get the weak symbol. If the | |
3970 | processor backend uses a COPY reloc, then if some routine in the | |
3971 | dynamic object changes the real symbol, we will not see that | |
3972 | change in the corresponding weak symbol. This is the way other | |
3973 | ELF linkers work as well, and seems to be a result of the shared | |
3974 | library model. | |
3975 | ||
3976 | I will clarify this issue. Most SVR4 shared libraries define the | |
3977 | variable _timezone and define timezone as a weak synonym. The | |
3978 | tzset call changes _timezone. If you write | |
3979 | extern int timezone; | |
3980 | int _timezone = 5; | |
3981 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
3982 | you might expect that, since timezone is a synonym for _timezone, | |
3983 | the same number will print both times. However, if the processor | |
3984 | backend uses a COPY reloc, then actually timezone will be copied | |
3985 | into your process image, and, since you define _timezone | |
3986 | yourself, _timezone will not. Thus timezone and _timezone will | |
3987 | wind up at different memory locations. The tzset call will set | |
3988 | _timezone, leaving timezone unchanged. */ | |
3989 | ||
3990 | if (h->weakdef != NULL) | |
3991 | { | |
fc4cc5bb ILT |
3992 | /* If we get to this point, we know there is an implicit |
3993 | reference by a regular object file via the weak symbol H. | |
3994 | FIXME: Is this really true? What if the traversal finds | |
3995 | H->WEAKDEF before it finds H? */ | |
3996 | h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
252b5132 | 3997 | |
fc4cc5bb | 3998 | if (! elf_adjust_dynamic_symbol (h->weakdef, (PTR) eif)) |
b34976b6 | 3999 | return FALSE; |
252b5132 RH |
4000 | } |
4001 | ||
4002 | /* If a symbol has no type and no size and does not require a PLT | |
4003 | entry, then we are probably about to do the wrong thing here: we | |
4004 | are probably going to create a COPY reloc for an empty object. | |
4005 | This case can arise when a shared object is built with assembly | |
4006 | code, and the assembly code fails to set the symbol type. */ | |
4007 | if (h->size == 0 | |
4008 | && h->type == STT_NOTYPE | |
4009 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
4010 | (*_bfd_error_handler) | |
4011 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
58821868 | 4012 | h->root.root.string); |
252b5132 RH |
4013 | |
4014 | dynobj = elf_hash_table (eif->info)->dynobj; | |
4015 | bed = get_elf_backend_data (dynobj); | |
4016 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
4017 | { | |
b34976b6 AM |
4018 | eif->failed = TRUE; |
4019 | return FALSE; | |
252b5132 RH |
4020 | } |
4021 | ||
b34976b6 | 4022 | return TRUE; |
252b5132 RH |
4023 | } |
4024 | \f | |
4025 | /* This routine is used to export all defined symbols into the dynamic | |
4026 | symbol table. It is called via elf_link_hash_traverse. */ | |
4027 | ||
b34976b6 | 4028 | static bfd_boolean |
252b5132 RH |
4029 | elf_export_symbol (h, data) |
4030 | struct elf_link_hash_entry *h; | |
4031 | PTR data; | |
4032 | { | |
4033 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
4034 | ||
4035 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
4036 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 4037 | return TRUE; |
252b5132 | 4038 | |
e92d460e AM |
4039 | if (h->root.type == bfd_link_hash_warning) |
4040 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4041 | ||
252b5132 RH |
4042 | if (h->dynindx == -1 |
4043 | && (h->elf_link_hash_flags | |
4044 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4045 | { | |
bc2b6df7 L |
4046 | struct bfd_elf_version_tree *t; |
4047 | struct bfd_elf_version_expr *d; | |
4048 | ||
4049 | for (t = eif->verdefs; t != NULL; t = t->next) | |
252b5132 | 4050 | { |
bc2b6df7 L |
4051 | if (t->globals != NULL) |
4052 | { | |
4053 | for (d = t->globals; d != NULL; d = d->next) | |
4054 | { | |
4055 | if ((*d->match) (d, h->root.root.string)) | |
4056 | goto doit; | |
4057 | } | |
4058 | } | |
4059 | ||
4060 | if (t->locals != NULL) | |
4061 | { | |
4062 | for (d = t->locals ; d != NULL; d = d->next) | |
4063 | { | |
4064 | if ((*d->match) (d, h->root.root.string)) | |
b34976b6 | 4065 | return TRUE; |
bc2b6df7 L |
4066 | } |
4067 | } | |
252b5132 | 4068 | } |
bc2b6df7 L |
4069 | |
4070 | if (!eif->verdefs) | |
c44233aa | 4071 | { |
58821868 | 4072 | doit: |
bc2b6df7 L |
4073 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
4074 | { | |
b34976b6 AM |
4075 | eif->failed = TRUE; |
4076 | return FALSE; | |
bc2b6df7 | 4077 | } |
c44233aa | 4078 | } |
252b5132 RH |
4079 | } |
4080 | ||
b34976b6 | 4081 | return TRUE; |
252b5132 RH |
4082 | } |
4083 | \f | |
4084 | /* Look through the symbols which are defined in other shared | |
4085 | libraries and referenced here. Update the list of version | |
4086 | dependencies. This will be put into the .gnu.version_r section. | |
4087 | This function is called via elf_link_hash_traverse. */ | |
4088 | ||
b34976b6 | 4089 | static bfd_boolean |
252b5132 RH |
4090 | elf_link_find_version_dependencies (h, data) |
4091 | struct elf_link_hash_entry *h; | |
4092 | PTR data; | |
4093 | { | |
4094 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
4095 | Elf_Internal_Verneed *t; | |
4096 | Elf_Internal_Vernaux *a; | |
dc810e39 | 4097 | bfd_size_type amt; |
252b5132 | 4098 | |
e92d460e AM |
4099 | if (h->root.type == bfd_link_hash_warning) |
4100 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4101 | ||
252b5132 RH |
4102 | /* We only care about symbols defined in shared objects with version |
4103 | information. */ | |
4104 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4105 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4106 | || h->dynindx == -1 | |
4107 | || h->verinfo.verdef == NULL) | |
b34976b6 | 4108 | return TRUE; |
252b5132 RH |
4109 | |
4110 | /* See if we already know about this version. */ | |
4111 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
4112 | { | |
4113 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
4114 | continue; | |
4115 | ||
4116 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
4117 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
b34976b6 | 4118 | return TRUE; |
252b5132 RH |
4119 | |
4120 | break; | |
4121 | } | |
4122 | ||
4123 | /* This is a new version. Add it to tree we are building. */ | |
4124 | ||
4125 | if (t == NULL) | |
4126 | { | |
dc810e39 AM |
4127 | amt = sizeof *t; |
4128 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4129 | if (t == NULL) |
4130 | { | |
b34976b6 AM |
4131 | rinfo->failed = TRUE; |
4132 | return FALSE; | |
252b5132 RH |
4133 | } |
4134 | ||
4135 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
4136 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
4137 | elf_tdata (rinfo->output_bfd)->verref = t; | |
4138 | } | |
4139 | ||
dc810e39 AM |
4140 | amt = sizeof *a; |
4141 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4142 | |
4143 | /* Note that we are copying a string pointer here, and testing it | |
4144 | above. If bfd_elf_string_from_elf_section is ever changed to | |
4145 | discard the string data when low in memory, this will have to be | |
4146 | fixed. */ | |
4147 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
4148 | ||
4149 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
4150 | a->vna_nextptr = t->vn_auxptr; | |
4151 | ||
4152 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
4153 | ++rinfo->vers; | |
4154 | ||
4155 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
4156 | ||
4157 | t->vn_auxptr = a; | |
4158 | ||
b34976b6 | 4159 | return TRUE; |
252b5132 RH |
4160 | } |
4161 | ||
4162 | /* Figure out appropriate versions for all the symbols. We may not | |
4163 | have the version number script until we have read all of the input | |
4164 | files, so until that point we don't know which symbols should be | |
4165 | local. This function is called via elf_link_hash_traverse. */ | |
4166 | ||
b34976b6 | 4167 | static bfd_boolean |
252b5132 RH |
4168 | elf_link_assign_sym_version (h, data) |
4169 | struct elf_link_hash_entry *h; | |
4170 | PTR data; | |
4171 | { | |
dc810e39 AM |
4172 | struct elf_assign_sym_version_info *sinfo; |
4173 | struct bfd_link_info *info; | |
c61b8717 | 4174 | struct elf_backend_data *bed; |
252b5132 RH |
4175 | struct elf_info_failed eif; |
4176 | char *p; | |
dc810e39 AM |
4177 | bfd_size_type amt; |
4178 | ||
4179 | sinfo = (struct elf_assign_sym_version_info *) data; | |
4180 | info = sinfo->info; | |
252b5132 | 4181 | |
e92d460e AM |
4182 | if (h->root.type == bfd_link_hash_warning) |
4183 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4184 | ||
252b5132 | 4185 | /* Fix the symbol flags. */ |
b34976b6 | 4186 | eif.failed = FALSE; |
252b5132 RH |
4187 | eif.info = info; |
4188 | if (! elf_fix_symbol_flags (h, &eif)) | |
4189 | { | |
4190 | if (eif.failed) | |
b34976b6 AM |
4191 | sinfo->failed = TRUE; |
4192 | return FALSE; | |
252b5132 RH |
4193 | } |
4194 | ||
4195 | /* We only need version numbers for symbols defined in regular | |
4196 | objects. */ | |
4197 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
b34976b6 | 4198 | return TRUE; |
252b5132 | 4199 | |
c61b8717 | 4200 | bed = get_elf_backend_data (sinfo->output_bfd); |
252b5132 RH |
4201 | p = strchr (h->root.root.string, ELF_VER_CHR); |
4202 | if (p != NULL && h->verinfo.vertree == NULL) | |
4203 | { | |
4204 | struct bfd_elf_version_tree *t; | |
b34976b6 | 4205 | bfd_boolean hidden; |
252b5132 | 4206 | |
b34976b6 | 4207 | hidden = TRUE; |
252b5132 RH |
4208 | |
4209 | /* There are two consecutive ELF_VER_CHR characters if this is | |
c44233aa | 4210 | not a hidden symbol. */ |
252b5132 RH |
4211 | ++p; |
4212 | if (*p == ELF_VER_CHR) | |
4213 | { | |
b34976b6 | 4214 | hidden = FALSE; |
252b5132 RH |
4215 | ++p; |
4216 | } | |
4217 | ||
4218 | /* If there is no version string, we can just return out. */ | |
4219 | if (*p == '\0') | |
4220 | { | |
4221 | if (hidden) | |
4222 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
b34976b6 | 4223 | return TRUE; |
252b5132 RH |
4224 | } |
4225 | ||
4226 | /* Look for the version. If we find it, it is no longer weak. */ | |
4227 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
4228 | { | |
4229 | if (strcmp (t->name, p) == 0) | |
4230 | { | |
dc810e39 | 4231 | size_t len; |
252b5132 RH |
4232 | char *alc; |
4233 | struct bfd_elf_version_expr *d; | |
4234 | ||
4235 | len = p - h->root.root.string; | |
e5094212 | 4236 | alc = bfd_malloc ((bfd_size_type) len); |
252b5132 | 4237 | if (alc == NULL) |
b34976b6 | 4238 | return FALSE; |
d4c88bbb | 4239 | memcpy (alc, h->root.root.string, len - 1); |
252b5132 RH |
4240 | alc[len - 1] = '\0'; |
4241 | if (alc[len - 2] == ELF_VER_CHR) | |
c44233aa | 4242 | alc[len - 2] = '\0'; |
252b5132 RH |
4243 | |
4244 | h->verinfo.vertree = t; | |
b34976b6 | 4245 | t->used = TRUE; |
252b5132 RH |
4246 | d = NULL; |
4247 | ||
4248 | if (t->globals != NULL) | |
4249 | { | |
4250 | for (d = t->globals; d != NULL; d = d->next) | |
4251 | if ((*d->match) (d, alc)) | |
4252 | break; | |
4253 | } | |
4254 | ||
4255 | /* See if there is anything to force this symbol to | |
c44233aa | 4256 | local scope. */ |
252b5132 RH |
4257 | if (d == NULL && t->locals != NULL) |
4258 | { | |
4259 | for (d = t->locals; d != NULL; d = d->next) | |
4260 | { | |
4261 | if ((*d->match) (d, alc)) | |
4262 | { | |
4263 | if (h->dynindx != -1 | |
4264 | && info->shared | |
99293407 | 4265 | && ! info->export_dynamic) |
252b5132 | 4266 | { |
b34976b6 | 4267 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4268 | } |
4269 | ||
4270 | break; | |
4271 | } | |
4272 | } | |
4273 | } | |
4274 | ||
e5094212 | 4275 | free (alc); |
252b5132 RH |
4276 | break; |
4277 | } | |
4278 | } | |
4279 | ||
4280 | /* If we are building an application, we need to create a | |
c44233aa | 4281 | version node for this version. */ |
252b5132 RH |
4282 | if (t == NULL && ! info->shared) |
4283 | { | |
4284 | struct bfd_elf_version_tree **pp; | |
4285 | int version_index; | |
4286 | ||
4287 | /* If we aren't going to export this symbol, we don't need | |
c44233aa | 4288 | to worry about it. */ |
252b5132 | 4289 | if (h->dynindx == -1) |
b34976b6 | 4290 | return TRUE; |
252b5132 | 4291 | |
dc810e39 | 4292 | amt = sizeof *t; |
252b5132 | 4293 | t = ((struct bfd_elf_version_tree *) |
dc810e39 | 4294 | bfd_alloc (sinfo->output_bfd, amt)); |
252b5132 RH |
4295 | if (t == NULL) |
4296 | { | |
b34976b6 AM |
4297 | sinfo->failed = TRUE; |
4298 | return FALSE; | |
252b5132 RH |
4299 | } |
4300 | ||
4301 | t->next = NULL; | |
4302 | t->name = p; | |
4303 | t->globals = NULL; | |
4304 | t->locals = NULL; | |
4305 | t->deps = NULL; | |
4306 | t->name_indx = (unsigned int) -1; | |
b34976b6 | 4307 | t->used = TRUE; |
252b5132 RH |
4308 | |
4309 | version_index = 1; | |
6b9b879a JJ |
4310 | /* Don't count anonymous version tag. */ |
4311 | if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0) | |
4312 | version_index = 0; | |
252b5132 RH |
4313 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) |
4314 | ++version_index; | |
4315 | t->vernum = version_index; | |
4316 | ||
4317 | *pp = t; | |
4318 | ||
4319 | h->verinfo.vertree = t; | |
4320 | } | |
4321 | else if (t == NULL) | |
4322 | { | |
4323 | /* We could not find the version for a symbol when | |
c44233aa | 4324 | generating a shared archive. Return an error. */ |
252b5132 RH |
4325 | (*_bfd_error_handler) |
4326 | (_("%s: undefined versioned symbol name %s"), | |
4327 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
4328 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 AM |
4329 | sinfo->failed = TRUE; |
4330 | return FALSE; | |
252b5132 RH |
4331 | } |
4332 | ||
4333 | if (hidden) | |
4334 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
4335 | } | |
4336 | ||
4337 | /* If we don't have a version for this symbol, see if we can find | |
4338 | something. */ | |
4339 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
4340 | { | |
4341 | struct bfd_elf_version_tree *t; | |
58821868 | 4342 | struct bfd_elf_version_tree *local_ver; |
252b5132 RH |
4343 | struct bfd_elf_version_expr *d; |
4344 | ||
4345 | /* See if can find what version this symbol is in. If the | |
c44233aa AM |
4346 | symbol is supposed to be local, then don't actually register |
4347 | it. */ | |
58821868 | 4348 | local_ver = NULL; |
252b5132 RH |
4349 | for (t = sinfo->verdefs; t != NULL; t = t->next) |
4350 | { | |
4351 | if (t->globals != NULL) | |
4352 | { | |
b34976b6 | 4353 | bfd_boolean matched; |
31941635 | 4354 | |
b34976b6 | 4355 | matched = FALSE; |
252b5132 RH |
4356 | for (d = t->globals; d != NULL; d = d->next) |
4357 | { | |
4358 | if ((*d->match) (d, h->root.root.string)) | |
4359 | { | |
31941635 | 4360 | if (d->symver) |
b34976b6 | 4361 | matched = TRUE; |
31941635 L |
4362 | else |
4363 | { | |
4364 | /* There is a version without definition. Make | |
4365 | the symbol the default definition for this | |
4366 | version. */ | |
4367 | h->verinfo.vertree = t; | |
4368 | local_ver = NULL; | |
4369 | d->script = 1; | |
4370 | break; | |
4371 | } | |
252b5132 RH |
4372 | } |
4373 | } | |
4374 | ||
4375 | if (d != NULL) | |
4376 | break; | |
31941635 L |
4377 | else if (matched) |
4378 | /* There is no undefined version for this symbol. Hide the | |
4379 | default one. */ | |
b34976b6 | 4380 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4381 | } |
4382 | ||
4383 | if (t->locals != NULL) | |
4384 | { | |
4385 | for (d = t->locals; d != NULL; d = d->next) | |
4386 | { | |
58821868 AM |
4387 | /* If the match is "*", keep looking for a more |
4388 | explicit, perhaps even global, match. */ | |
252b5132 | 4389 | if (d->pattern[0] == '*' && d->pattern[1] == '\0') |
58821868 | 4390 | local_ver = t; |
252b5132 RH |
4391 | else if ((*d->match) (d, h->root.root.string)) |
4392 | { | |
58821868 | 4393 | local_ver = t; |
252b5132 RH |
4394 | break; |
4395 | } | |
4396 | } | |
4397 | ||
4398 | if (d != NULL) | |
4399 | break; | |
4400 | } | |
4401 | } | |
4402 | ||
58821868 | 4403 | if (local_ver != NULL) |
252b5132 | 4404 | { |
58821868 | 4405 | h->verinfo.vertree = local_ver; |
252b5132 RH |
4406 | if (h->dynindx != -1 |
4407 | && info->shared | |
99293407 | 4408 | && ! info->export_dynamic) |
252b5132 | 4409 | { |
b34976b6 | 4410 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4411 | } |
4412 | } | |
4413 | } | |
4414 | ||
b34976b6 | 4415 | return TRUE; |
252b5132 | 4416 | } |
252b5132 RH |
4417 | \f |
4418 | /* Final phase of ELF linker. */ | |
4419 | ||
4420 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4421 | ||
4422 | struct elf_final_link_info | |
4423 | { | |
4424 | /* General link information. */ | |
4425 | struct bfd_link_info *info; | |
4426 | /* Output BFD. */ | |
4427 | bfd *output_bfd; | |
4428 | /* Symbol string table. */ | |
4429 | struct bfd_strtab_hash *symstrtab; | |
4430 | /* .dynsym section. */ | |
4431 | asection *dynsym_sec; | |
4432 | /* .hash section. */ | |
4433 | asection *hash_sec; | |
4434 | /* symbol version section (.gnu.version). */ | |
4435 | asection *symver_sec; | |
13ae64f3 JJ |
4436 | /* first SHF_TLS section (if any). */ |
4437 | asection *first_tls_sec; | |
252b5132 RH |
4438 | /* Buffer large enough to hold contents of any section. */ |
4439 | bfd_byte *contents; | |
4440 | /* Buffer large enough to hold external relocs of any section. */ | |
4441 | PTR external_relocs; | |
4442 | /* Buffer large enough to hold internal relocs of any section. */ | |
4443 | Elf_Internal_Rela *internal_relocs; | |
4444 | /* Buffer large enough to hold external local symbols of any input | |
4445 | BFD. */ | |
4446 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
4447 | /* And a buffer for symbol section indices. */ |
4448 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
4449 | /* Buffer large enough to hold internal local symbols of any input |
4450 | BFD. */ | |
4451 | Elf_Internal_Sym *internal_syms; | |
4452 | /* Array large enough to hold a symbol index for each local symbol | |
4453 | of any input BFD. */ | |
4454 | long *indices; | |
4455 | /* Array large enough to hold a section pointer for each local | |
4456 | symbol of any input BFD. */ | |
4457 | asection **sections; | |
4458 | /* Buffer to hold swapped out symbols. */ | |
4459 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
4460 | /* And one for symbol section indices. */ |
4461 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
4462 | /* Number of swapped out symbols in buffer. */ |
4463 | size_t symbuf_count; | |
4464 | /* Number of symbols which fit in symbuf. */ | |
4465 | size_t symbuf_size; | |
c97e73dd AM |
4466 | /* And same for symshndxbuf. */ |
4467 | size_t shndxbuf_size; | |
252b5132 RH |
4468 | }; |
4469 | ||
b34976b6 | 4470 | static bfd_boolean elf_link_output_sym |
252b5132 RH |
4471 | PARAMS ((struct elf_final_link_info *, const char *, |
4472 | Elf_Internal_Sym *, asection *)); | |
b34976b6 | 4473 | static bfd_boolean elf_link_flush_output_syms |
252b5132 | 4474 | PARAMS ((struct elf_final_link_info *)); |
b34976b6 | 4475 | static bfd_boolean elf_link_output_extsym |
252b5132 | 4476 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4477 | static bfd_boolean elf_link_sec_merge_syms |
f5fa8ca2 | 4478 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4479 | static bfd_boolean elf_link_check_versioned_symbol |
f5d44ba0 | 4480 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 4481 | static bfd_boolean elf_link_input_bfd |
252b5132 | 4482 | PARAMS ((struct elf_final_link_info *, bfd *)); |
b34976b6 | 4483 | static bfd_boolean elf_reloc_link_order |
252b5132 RH |
4484 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
4485 | struct bfd_link_order *)); | |
4486 | ||
4487 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
4488 | ||
4489 | struct elf_outext_info | |
4490 | { | |
b34976b6 AM |
4491 | bfd_boolean failed; |
4492 | bfd_boolean localsyms; | |
252b5132 RH |
4493 | struct elf_final_link_info *finfo; |
4494 | }; | |
4495 | ||
23bc299b MM |
4496 | /* Compute the size of, and allocate space for, REL_HDR which is the |
4497 | section header for a section containing relocations for O. */ | |
4498 | ||
b34976b6 | 4499 | static bfd_boolean |
23bc299b MM |
4500 | elf_link_size_reloc_section (abfd, rel_hdr, o) |
4501 | bfd *abfd; | |
4502 | Elf_Internal_Shdr *rel_hdr; | |
4503 | asection *o; | |
4504 | { | |
dc810e39 AM |
4505 | bfd_size_type reloc_count; |
4506 | bfd_size_type num_rel_hashes; | |
23bc299b | 4507 | |
b037af20 MM |
4508 | /* Figure out how many relocations there will be. */ |
4509 | if (rel_hdr == &elf_section_data (o)->rel_hdr) | |
4510 | reloc_count = elf_section_data (o)->rel_count; | |
4511 | else | |
4512 | reloc_count = elf_section_data (o)->rel_count2; | |
4513 | ||
9317eacc CM |
4514 | num_rel_hashes = o->reloc_count; |
4515 | if (num_rel_hashes < reloc_count) | |
4516 | num_rel_hashes = reloc_count; | |
dc810e39 | 4517 | |
b037af20 MM |
4518 | /* That allows us to calculate the size of the section. */ |
4519 | rel_hdr->sh_size = rel_hdr->sh_entsize * reloc_count; | |
23bc299b MM |
4520 | |
4521 | /* The contents field must last into write_object_contents, so we | |
755cfd29 NC |
4522 | allocate it with bfd_alloc rather than malloc. Also since we |
4523 | cannot be sure that the contents will actually be filled in, | |
4524 | we zero the allocated space. */ | |
4525 | rel_hdr->contents = (PTR) bfd_zalloc (abfd, rel_hdr->sh_size); | |
23bc299b | 4526 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
b34976b6 | 4527 | return FALSE; |
3e932841 | 4528 | |
b037af20 MM |
4529 | /* We only allocate one set of hash entries, so we only do it the |
4530 | first time we are called. */ | |
9317eacc CM |
4531 | if (elf_section_data (o)->rel_hashes == NULL |
4532 | && num_rel_hashes) | |
b037af20 | 4533 | { |
209f668e NC |
4534 | struct elf_link_hash_entry **p; |
4535 | ||
b037af20 | 4536 | p = ((struct elf_link_hash_entry **) |
9317eacc | 4537 | bfd_zmalloc (num_rel_hashes |
209f668e | 4538 | * sizeof (struct elf_link_hash_entry *))); |
9317eacc | 4539 | if (p == NULL) |
b34976b6 | 4540 | return FALSE; |
23bc299b | 4541 | |
b037af20 | 4542 | elf_section_data (o)->rel_hashes = p; |
b037af20 | 4543 | } |
23bc299b | 4544 | |
b34976b6 | 4545 | return TRUE; |
23bc299b MM |
4546 | } |
4547 | ||
31367b81 MM |
4548 | /* When performing a relocateable link, the input relocations are |
4549 | preserved. But, if they reference global symbols, the indices | |
4550 | referenced must be updated. Update all the relocations in | |
4551 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
4552 | ||
4553 | static void | |
4554 | elf_link_adjust_relocs (abfd, rel_hdr, count, rel_hash) | |
4555 | bfd *abfd; | |
4556 | Elf_Internal_Shdr *rel_hdr; | |
4557 | unsigned int count; | |
4558 | struct elf_link_hash_entry **rel_hash; | |
4559 | { | |
4560 | unsigned int i; | |
32f0787a | 4561 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf AM |
4562 | bfd_byte *erela; |
4563 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); | |
4564 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
209f668e | 4565 | |
947216bf | 4566 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
209f668e | 4567 | { |
947216bf AM |
4568 | swap_in = bed->s->swap_reloc_in; |
4569 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 4570 | } |
947216bf | 4571 | else if (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) |
209f668e | 4572 | { |
947216bf AM |
4573 | swap_in = bed->s->swap_reloca_in; |
4574 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 4575 | } |
947216bf AM |
4576 | else |
4577 | abort (); | |
4578 | ||
4579 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
4580 | abort (); | |
31367b81 | 4581 | |
947216bf AM |
4582 | erela = rel_hdr->contents; |
4583 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 4584 | { |
947216bf AM |
4585 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
4586 | unsigned int j; | |
4587 | ||
31367b81 MM |
4588 | if (*rel_hash == NULL) |
4589 | continue; | |
4590 | ||
4591 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
4592 | ||
947216bf AM |
4593 | (*swap_in) (abfd, erela, irela); |
4594 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
4595 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
4596 | ELF_R_TYPE (irela[j].r_info)); | |
4597 | (*swap_out) (abfd, irela, erela); | |
31367b81 MM |
4598 | } |
4599 | } | |
4600 | ||
58821868 AM |
4601 | struct elf_link_sort_rela |
4602 | { | |
db6751f2 JJ |
4603 | bfd_vma offset; |
4604 | enum elf_reloc_type_class type; | |
947216bf AM |
4605 | /* We use this as an array of size int_rels_per_ext_rel. */ |
4606 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
4607 | }; |
4608 | ||
4609 | static int | |
4610 | elf_link_sort_cmp1 (A, B) | |
4611 | const PTR A; | |
4612 | const PTR B; | |
4613 | { | |
f51e552e AM |
4614 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4615 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4616 | int relativea, relativeb; |
4617 | ||
4618 | relativea = a->type == reloc_class_relative; | |
4619 | relativeb = b->type == reloc_class_relative; | |
4620 | ||
4621 | if (relativea < relativeb) | |
db6751f2 | 4622 | return 1; |
fcfbdf31 JJ |
4623 | if (relativea > relativeb) |
4624 | return -1; | |
947216bf | 4625 | if (ELF_R_SYM (a->rela->r_info) < ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4626 | return -1; |
947216bf | 4627 | if (ELF_R_SYM (a->rela->r_info) > ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4628 | return 1; |
947216bf | 4629 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4630 | return -1; |
947216bf | 4631 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4632 | return 1; |
4633 | return 0; | |
4634 | } | |
4635 | ||
4636 | static int | |
4637 | elf_link_sort_cmp2 (A, B) | |
4638 | const PTR A; | |
4639 | const PTR B; | |
4640 | { | |
f51e552e AM |
4641 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4642 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4643 | int copya, copyb; |
4644 | ||
4645 | if (a->offset < b->offset) | |
4646 | return -1; | |
4647 | if (a->offset > b->offset) | |
4648 | return 1; | |
290394d6 JJ |
4649 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
4650 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
4651 | if (copya < copyb) |
4652 | return -1; | |
4653 | if (copya > copyb) | |
4654 | return 1; | |
947216bf | 4655 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4656 | return -1; |
947216bf | 4657 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4658 | return 1; |
4659 | return 0; | |
4660 | } | |
4661 | ||
4662 | static size_t | |
4663 | elf_link_sort_relocs (abfd, info, psec) | |
4664 | bfd *abfd; | |
4665 | struct bfd_link_info *info; | |
4666 | asection **psec; | |
4667 | { | |
4668 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
4669 | asection *reldyn, *o; | |
f51e552e | 4670 | bfd_size_type count, size; |
947216bf AM |
4671 | size_t i, ret, sort_elt, ext_size; |
4672 | bfd_byte *sort, *s_non_relative, *p; | |
4673 | struct elf_link_sort_rela *sq; | |
db6751f2 | 4674 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 4675 | int i2e = bed->s->int_rels_per_ext_rel; |
947216bf AM |
4676 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
4677 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
db6751f2 JJ |
4678 | |
4679 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
4680 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4681 | { | |
4682 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
4683 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4684 | return 0; | |
947216bf AM |
4685 | ext_size = sizeof (Elf_External_Rel); |
4686 | swap_in = bed->s->swap_reloc_in; | |
4687 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
4688 | } |
4689 | else | |
947216bf AM |
4690 | { |
4691 | ext_size = sizeof (Elf_External_Rela); | |
4692 | swap_in = bed->s->swap_reloca_in; | |
4693 | swap_out = bed->s->swap_reloca_out; | |
4694 | } | |
4695 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
4696 | |
4697 | size = 0; | |
4698 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4699 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4700 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4701 | && o->output_section == reldyn) | |
4702 | size += o->_raw_size; | |
4703 | ||
4704 | if (size != reldyn->_raw_size) | |
4705 | return 0; | |
4706 | ||
947216bf AM |
4707 | sort_elt = (sizeof (struct elf_link_sort_rela) |
4708 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
4709 | sort = bfd_zmalloc (sort_elt * count); | |
4710 | if (sort == NULL) | |
db6751f2 JJ |
4711 | { |
4712 | (*info->callbacks->warning) | |
dc810e39 AM |
4713 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, |
4714 | (bfd_vma) 0); | |
db6751f2 JJ |
4715 | return 0; |
4716 | } | |
4717 | ||
4718 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4719 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4720 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4721 | && o->output_section == reldyn) | |
4722 | { | |
947216bf | 4723 | bfd_byte *erel, *erelend; |
db6751f2 | 4724 | |
947216bf AM |
4725 | erel = o->contents; |
4726 | erelend = o->contents + o->_raw_size; | |
4727 | p = sort + o->output_offset / ext_size * sort_elt; | |
4728 | while (erel < erelend) | |
db6751f2 | 4729 | { |
947216bf AM |
4730 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4731 | (*swap_in) (abfd, erel, s->rela); | |
4732 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
4733 | p += sort_elt; | |
4734 | erel += ext_size; | |
db6751f2 JJ |
4735 | } |
4736 | } | |
4737 | ||
947216bf AM |
4738 | qsort (sort, (size_t) count, sort_elt, elf_link_sort_cmp1); |
4739 | ||
4740 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 4741 | { |
947216bf AM |
4742 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4743 | if (s->type != reloc_class_relative) | |
4744 | break; | |
db6751f2 | 4745 | } |
947216bf AM |
4746 | ret = i; |
4747 | s_non_relative = p; | |
4748 | ||
4749 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
4750 | for (; i < count; i++, p += sort_elt) | |
4751 | { | |
4752 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
4753 | if (ELF_R_SYM (sp->rela->r_info) != ELF_R_SYM (sq->rela->r_info)) | |
4754 | sq = sp; | |
4755 | sp->offset = sq->rela->r_offset; | |
4756 | } | |
4757 | ||
4758 | qsort (s_non_relative, (size_t) count - ret, sort_elt, elf_link_sort_cmp2); | |
dc810e39 | 4759 | |
db6751f2 JJ |
4760 | for (o = dynobj->sections; o != NULL; o = o->next) |
4761 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4762 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4763 | && o->output_section == reldyn) | |
4764 | { | |
947216bf | 4765 | bfd_byte *erel, *erelend; |
db6751f2 | 4766 | |
947216bf AM |
4767 | erel = o->contents; |
4768 | erelend = o->contents + o->_raw_size; | |
4769 | p = sort + o->output_offset / ext_size * sort_elt; | |
4770 | while (erel < erelend) | |
db6751f2 | 4771 | { |
947216bf AM |
4772 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4773 | (*swap_out) (abfd, s->rela, erel); | |
4774 | p += sort_elt; | |
4775 | erel += ext_size; | |
db6751f2 JJ |
4776 | } |
4777 | } | |
4778 | ||
db6751f2 JJ |
4779 | *psec = reldyn; |
4780 | return ret; | |
4781 | } | |
4782 | ||
252b5132 RH |
4783 | /* Do the final step of an ELF link. */ |
4784 | ||
b34976b6 | 4785 | bfd_boolean |
252b5132 RH |
4786 | elf_bfd_final_link (abfd, info) |
4787 | bfd *abfd; | |
4788 | struct bfd_link_info *info; | |
4789 | { | |
b34976b6 AM |
4790 | bfd_boolean dynamic; |
4791 | bfd_boolean emit_relocs; | |
252b5132 RH |
4792 | bfd *dynobj; |
4793 | struct elf_final_link_info finfo; | |
4794 | register asection *o; | |
4795 | register struct bfd_link_order *p; | |
4796 | register bfd *sub; | |
dc810e39 AM |
4797 | bfd_size_type max_contents_size; |
4798 | bfd_size_type max_external_reloc_size; | |
4799 | bfd_size_type max_internal_reloc_count; | |
4800 | bfd_size_type max_sym_count; | |
9ad5cbcf | 4801 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
4802 | file_ptr off; |
4803 | Elf_Internal_Sym elfsym; | |
4804 | unsigned int i; | |
4805 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 4806 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 RH |
4807 | Elf_Internal_Shdr *symstrtab_hdr; |
4808 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4809 | struct elf_outext_info eoinfo; | |
b34976b6 | 4810 | bfd_boolean merged; |
db6751f2 JJ |
4811 | size_t relativecount = 0; |
4812 | asection *reldyn = 0; | |
dc810e39 | 4813 | bfd_size_type amt; |
252b5132 | 4814 | |
8ea2e4bd | 4815 | if (! is_elf_hash_table (info)) |
b34976b6 | 4816 | return FALSE; |
8ea2e4bd | 4817 | |
252b5132 RH |
4818 | if (info->shared) |
4819 | abfd->flags |= DYNAMIC; | |
4820 | ||
4821 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
4822 | dynobj = elf_hash_table (info)->dynobj; | |
4823 | ||
9317eacc | 4824 | emit_relocs = (info->relocateable |
c44233aa AM |
4825 | || info->emitrelocations |
4826 | || bed->elf_backend_emit_relocs); | |
9317eacc | 4827 | |
252b5132 RH |
4828 | finfo.info = info; |
4829 | finfo.output_bfd = abfd; | |
4830 | finfo.symstrtab = elf_stringtab_init (); | |
4831 | if (finfo.symstrtab == NULL) | |
b34976b6 | 4832 | return FALSE; |
252b5132 RH |
4833 | |
4834 | if (! dynamic) | |
4835 | { | |
4836 | finfo.dynsym_sec = NULL; | |
4837 | finfo.hash_sec = NULL; | |
4838 | finfo.symver_sec = NULL; | |
4839 | } | |
4840 | else | |
4841 | { | |
4842 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4843 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
4844 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
4845 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
4846 | /* Note that it is OK if symver_sec is NULL. */ | |
4847 | } | |
4848 | ||
4849 | finfo.contents = NULL; | |
4850 | finfo.external_relocs = NULL; | |
4851 | finfo.internal_relocs = NULL; | |
4852 | finfo.external_syms = NULL; | |
9ad5cbcf | 4853 | finfo.locsym_shndx = NULL; |
252b5132 RH |
4854 | finfo.internal_syms = NULL; |
4855 | finfo.indices = NULL; | |
4856 | finfo.sections = NULL; | |
4857 | finfo.symbuf = NULL; | |
9ad5cbcf | 4858 | finfo.symshndxbuf = NULL; |
252b5132 | 4859 | finfo.symbuf_count = 0; |
c97e73dd | 4860 | finfo.shndxbuf_size = 0; |
13ae64f3 JJ |
4861 | finfo.first_tls_sec = NULL; |
4862 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
4863 | if ((o->flags & SEC_THREAD_LOCAL) != 0 | |
4864 | && (o->flags & SEC_LOAD) != 0) | |
4865 | { | |
4866 | finfo.first_tls_sec = o; | |
4867 | break; | |
4868 | } | |
252b5132 RH |
4869 | |
4870 | /* Count up the number of relocations we will output for each output | |
4871 | section, so that we know the sizes of the reloc sections. We | |
4872 | also figure out some maximum sizes. */ | |
4873 | max_contents_size = 0; | |
4874 | max_external_reloc_size = 0; | |
4875 | max_internal_reloc_count = 0; | |
4876 | max_sym_count = 0; | |
9ad5cbcf | 4877 | max_sym_shndx_count = 0; |
b34976b6 | 4878 | merged = FALSE; |
252b5132 RH |
4879 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
4880 | { | |
4881 | o->reloc_count = 0; | |
4882 | ||
4883 | for (p = o->link_order_head; p != NULL; p = p->next) | |
4884 | { | |
4885 | if (p->type == bfd_section_reloc_link_order | |
4886 | || p->type == bfd_symbol_reloc_link_order) | |
4887 | ++o->reloc_count; | |
4888 | else if (p->type == bfd_indirect_link_order) | |
4889 | { | |
4890 | asection *sec; | |
4891 | ||
4892 | sec = p->u.indirect.section; | |
4893 | ||
4894 | /* Mark all sections which are to be included in the | |
4895 | link. This will normally be every section. We need | |
4896 | to do this so that we can identify any sections which | |
4897 | the linker has decided to not include. */ | |
b34976b6 | 4898 | sec->linker_mark = TRUE; |
252b5132 | 4899 | |
f5fa8ca2 | 4900 | if (sec->flags & SEC_MERGE) |
b34976b6 | 4901 | merged = TRUE; |
f5fa8ca2 | 4902 | |
a712da20 | 4903 | if (info->relocateable || info->emitrelocations) |
252b5132 | 4904 | o->reloc_count += sec->reloc_count; |
c44233aa | 4905 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
4906 | { |
4907 | Elf_Internal_Rela * relocs; | |
4908 | ||
4909 | relocs = (NAME(_bfd_elf,link_read_relocs) | |
4910 | (abfd, sec, (PTR) NULL, | |
4911 | (Elf_Internal_Rela *) NULL, info->keep_memory)); | |
4912 | ||
c44233aa AM |
4913 | o->reloc_count |
4914 | += (*bed->elf_backend_count_relocs) (sec, relocs); | |
9317eacc | 4915 | |
6cdc0ccc | 4916 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
4917 | free (relocs); |
4918 | } | |
252b5132 RH |
4919 | |
4920 | if (sec->_raw_size > max_contents_size) | |
4921 | max_contents_size = sec->_raw_size; | |
4922 | if (sec->_cooked_size > max_contents_size) | |
4923 | max_contents_size = sec->_cooked_size; | |
4924 | ||
4925 | /* We are interested in just local symbols, not all | |
4926 | symbols. */ | |
4927 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
4928 | && (sec->owner->flags & DYNAMIC) == 0) | |
4929 | { | |
4930 | size_t sym_count; | |
4931 | ||
4932 | if (elf_bad_symtab (sec->owner)) | |
4933 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
4934 | / sizeof (Elf_External_Sym)); | |
4935 | else | |
4936 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
4937 | ||
4938 | if (sym_count > max_sym_count) | |
4939 | max_sym_count = sym_count; | |
4940 | ||
9ad5cbcf AM |
4941 | if (sym_count > max_sym_shndx_count |
4942 | && elf_symtab_shndx (sec->owner) != 0) | |
4943 | max_sym_shndx_count = sym_count; | |
4944 | ||
252b5132 RH |
4945 | if ((sec->flags & SEC_RELOC) != 0) |
4946 | { | |
4947 | size_t ext_size; | |
4948 | ||
4949 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
4950 | if (ext_size > max_external_reloc_size) | |
4951 | max_external_reloc_size = ext_size; | |
4952 | if (sec->reloc_count > max_internal_reloc_count) | |
4953 | max_internal_reloc_count = sec->reloc_count; | |
4954 | } | |
4955 | } | |
4956 | } | |
4957 | } | |
4958 | ||
4959 | if (o->reloc_count > 0) | |
4960 | o->flags |= SEC_RELOC; | |
4961 | else | |
4962 | { | |
4963 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
4964 | set it (this is probably a bug) and if it is set | |
4965 | assign_section_numbers will create a reloc section. */ | |
4966 | o->flags &=~ SEC_RELOC; | |
4967 | } | |
4968 | ||
4969 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
4970 | zero. This is done in elf_fake_sections as well, but forcing | |
4971 | the VMA to 0 here will ensure that relocs against these | |
4972 | sections are handled correctly. */ | |
4973 | if ((o->flags & SEC_ALLOC) == 0 | |
4974 | && ! o->user_set_vma) | |
4975 | o->vma = 0; | |
4976 | } | |
4977 | ||
f5fa8ca2 JJ |
4978 | if (! info->relocateable && merged) |
4979 | elf_link_hash_traverse (elf_hash_table (info), | |
4980 | elf_link_sec_merge_syms, (PTR) abfd); | |
4981 | ||
252b5132 RH |
4982 | /* Figure out the file positions for everything but the symbol table |
4983 | and the relocs. We set symcount to force assign_section_numbers | |
4984 | to create a symbol table. */ | |
4985 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
4986 | BFD_ASSERT (! abfd->output_has_begun); | |
4987 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
4988 | goto error_return; | |
4989 | ||
b037af20 MM |
4990 | /* Figure out how many relocations we will have in each section. |
4991 | Just using RELOC_COUNT isn't good enough since that doesn't | |
4992 | maintain a separate value for REL vs. RELA relocations. */ | |
9317eacc | 4993 | if (emit_relocs) |
b037af20 MM |
4994 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
4995 | for (o = sub->sections; o != NULL; o = o->next) | |
4996 | { | |
814fe68a | 4997 | asection *output_section; |
b037af20 | 4998 | |
814fe68a ILT |
4999 | if (! o->linker_mark) |
5000 | { | |
5001 | /* This section was omitted from the link. */ | |
5002 | continue; | |
5003 | } | |
5004 | ||
5005 | output_section = o->output_section; | |
5006 | ||
5007 | if (output_section != NULL | |
5008 | && (o->flags & SEC_RELOC) != 0) | |
b037af20 | 5009 | { |
3e932841 | 5010 | struct bfd_elf_section_data *esdi |
b037af20 | 5011 | = elf_section_data (o); |
3e932841 | 5012 | struct bfd_elf_section_data *esdo |
b037af20 | 5013 | = elf_section_data (output_section); |
ce006217 MM |
5014 | unsigned int *rel_count; |
5015 | unsigned int *rel_count2; | |
c119f9b8 AM |
5016 | bfd_size_type entsize; |
5017 | bfd_size_type entsize2; | |
b037af20 | 5018 | |
c119f9b8 | 5019 | /* We must be careful to add the relocations from the |
ce006217 | 5020 | input section to the right output count. */ |
c119f9b8 AM |
5021 | entsize = esdi->rel_hdr.sh_entsize; |
5022 | entsize2 = esdi->rel_hdr2 ? esdi->rel_hdr2->sh_entsize : 0; | |
5023 | BFD_ASSERT ((entsize == sizeof (Elf_External_Rel) | |
5024 | || entsize == sizeof (Elf_External_Rela)) | |
5025 | && entsize2 != entsize | |
5026 | && (entsize2 == 0 | |
5027 | || entsize2 == sizeof (Elf_External_Rel) | |
5028 | || entsize2 == sizeof (Elf_External_Rela))); | |
5029 | if (entsize == esdo->rel_hdr.sh_entsize) | |
ce006217 MM |
5030 | { |
5031 | rel_count = &esdo->rel_count; | |
5032 | rel_count2 = &esdo->rel_count2; | |
5033 | } | |
5034 | else | |
5035 | { | |
5036 | rel_count = &esdo->rel_count2; | |
5037 | rel_count2 = &esdo->rel_count; | |
5038 | } | |
3e932841 | 5039 | |
d9bc7a44 | 5040 | *rel_count += NUM_SHDR_ENTRIES (& esdi->rel_hdr); |
b037af20 | 5041 | if (esdi->rel_hdr2) |
d9bc7a44 | 5042 | *rel_count2 += NUM_SHDR_ENTRIES (esdi->rel_hdr2); |
9317eacc | 5043 | output_section->flags |= SEC_RELOC; |
b037af20 MM |
5044 | } |
5045 | } | |
5046 | ||
252b5132 RH |
5047 | /* That created the reloc sections. Set their sizes, and assign |
5048 | them file positions, and allocate some buffers. */ | |
5049 | for (o = abfd->sections; o != NULL; o = o->next) | |
5050 | { | |
5051 | if ((o->flags & SEC_RELOC) != 0) | |
5052 | { | |
23bc299b MM |
5053 | if (!elf_link_size_reloc_section (abfd, |
5054 | &elf_section_data (o)->rel_hdr, | |
5055 | o)) | |
252b5132 RH |
5056 | goto error_return; |
5057 | ||
23bc299b MM |
5058 | if (elf_section_data (o)->rel_hdr2 |
5059 | && !elf_link_size_reloc_section (abfd, | |
5060 | elf_section_data (o)->rel_hdr2, | |
5061 | o)) | |
252b5132 | 5062 | goto error_return; |
252b5132 | 5063 | } |
b037af20 MM |
5064 | |
5065 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 5066 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
5067 | elf_section_data (o)->rel_count = 0; |
5068 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
5069 | } |
5070 | ||
5071 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
5072 | ||
5073 | /* We have now assigned file positions for all the sections except | |
5074 | .symtab and .strtab. We start the .symtab section at the current | |
5075 | file position, and write directly to it. We build the .strtab | |
5076 | section in memory. */ | |
5077 | bfd_get_symcount (abfd) = 0; | |
5078 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5079 | /* sh_name is set in prep_headers. */ | |
5080 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 5081 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
252b5132 RH |
5082 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
5083 | /* sh_link is set in assign_section_numbers. */ | |
5084 | /* sh_info is set below. */ | |
5085 | /* sh_offset is set just below. */ | |
f0e1d18a | 5086 | symtab_hdr->sh_addralign = bed->s->file_align; |
252b5132 RH |
5087 | |
5088 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 5089 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
5090 | |
5091 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5092 | incorrect. We do not yet know the size of the .symtab section. | |
5093 | We correct next_file_pos below, after we do know the size. */ | |
5094 | ||
5095 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5096 | continuously seeking to the right position in the file. */ | |
5097 | if (! info->keep_memory || max_sym_count < 20) | |
5098 | finfo.symbuf_size = 20; | |
5099 | else | |
5100 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
5101 | amt = finfo.symbuf_size; |
5102 | amt *= sizeof (Elf_External_Sym); | |
5103 | finfo.symbuf = (Elf_External_Sym *) bfd_malloc (amt); | |
252b5132 RH |
5104 | if (finfo.symbuf == NULL) |
5105 | goto error_return; | |
9ad5cbcf AM |
5106 | if (elf_numsections (abfd) > SHN_LORESERVE) |
5107 | { | |
c97e73dd AM |
5108 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
5109 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
5110 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 5111 | amt *= sizeof (Elf_External_Sym_Shndx); |
c97e73dd | 5112 | finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9ad5cbcf AM |
5113 | if (finfo.symshndxbuf == NULL) |
5114 | goto error_return; | |
5115 | } | |
252b5132 RH |
5116 | |
5117 | /* Start writing out the symbol table. The first symbol is always a | |
5118 | dummy symbol. */ | |
9317eacc CM |
5119 | if (info->strip != strip_all |
5120 | || emit_relocs) | |
252b5132 RH |
5121 | { |
5122 | elfsym.st_value = 0; | |
5123 | elfsym.st_size = 0; | |
5124 | elfsym.st_info = 0; | |
5125 | elfsym.st_other = 0; | |
5126 | elfsym.st_shndx = SHN_UNDEF; | |
5127 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5128 | &elfsym, bfd_und_section_ptr)) | |
5129 | goto error_return; | |
5130 | } | |
5131 | ||
5132 | #if 0 | |
5133 | /* Some standard ELF linkers do this, but we don't because it causes | |
5134 | bootstrap comparison failures. */ | |
5135 | /* Output a file symbol for the output file as the second symbol. | |
5136 | We output this even if we are discarding local symbols, although | |
5137 | I'm not sure if this is correct. */ | |
5138 | elfsym.st_value = 0; | |
5139 | elfsym.st_size = 0; | |
5140 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5141 | elfsym.st_other = 0; | |
5142 | elfsym.st_shndx = SHN_ABS; | |
5143 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
5144 | &elfsym, bfd_abs_section_ptr)) | |
5145 | goto error_return; | |
5146 | #endif | |
5147 | ||
5148 | /* Output a symbol for each section. We output these even if we are | |
5149 | discarding local symbols, since they are used for relocs. These | |
5150 | symbols have no names. We store the index of each one in the | |
5151 | index field of the section, so that we can find it again when | |
5152 | outputting relocs. */ | |
9317eacc CM |
5153 | if (info->strip != strip_all |
5154 | || emit_relocs) | |
252b5132 RH |
5155 | { |
5156 | elfsym.st_size = 0; | |
5157 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5158 | elfsym.st_other = 0; | |
9ad5cbcf | 5159 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5160 | { |
5161 | o = section_from_elf_index (abfd, i); | |
5162 | if (o != NULL) | |
5163 | o->target_index = bfd_get_symcount (abfd); | |
5164 | elfsym.st_shndx = i; | |
7ad34365 | 5165 | if (info->relocateable || o == NULL) |
252b5132 RH |
5166 | elfsym.st_value = 0; |
5167 | else | |
5168 | elfsym.st_value = o->vma; | |
5169 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5170 | &elfsym, o)) | |
5171 | goto error_return; | |
c97e73dd | 5172 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 5173 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
5174 | } |
5175 | } | |
5176 | ||
5177 | /* Allocate some memory to hold information read in from the input | |
5178 | files. */ | |
9ad5cbcf AM |
5179 | if (max_contents_size != 0) |
5180 | { | |
5181 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
5182 | if (finfo.contents == NULL) | |
5183 | goto error_return; | |
5184 | } | |
5185 | ||
5186 | if (max_external_reloc_size != 0) | |
5187 | { | |
5188 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
5189 | if (finfo.external_relocs == NULL) | |
5190 | goto error_return; | |
5191 | } | |
5192 | ||
5193 | if (max_internal_reloc_count != 0) | |
5194 | { | |
5195 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
5196 | amt *= sizeof (Elf_Internal_Rela); | |
5197 | finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); | |
5198 | if (finfo.internal_relocs == NULL) | |
5199 | goto error_return; | |
5200 | } | |
5201 | ||
5202 | if (max_sym_count != 0) | |
5203 | { | |
5204 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
5205 | finfo.external_syms = (Elf_External_Sym *) bfd_malloc (amt); | |
5206 | if (finfo.external_syms == NULL) | |
5207 | goto error_return; | |
5208 | ||
5209 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
5210 | finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); | |
5211 | if (finfo.internal_syms == NULL) | |
5212 | goto error_return; | |
5213 | ||
5214 | amt = max_sym_count * sizeof (long); | |
5215 | finfo.indices = (long *) bfd_malloc (amt); | |
5216 | if (finfo.indices == NULL) | |
5217 | goto error_return; | |
5218 | ||
5219 | amt = max_sym_count * sizeof (asection *); | |
5220 | finfo.sections = (asection **) bfd_malloc (amt); | |
5221 | if (finfo.sections == NULL) | |
5222 | goto error_return; | |
5223 | } | |
5224 | ||
5225 | if (max_sym_shndx_count != 0) | |
5226 | { | |
5227 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
5228 | finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
5229 | if (finfo.locsym_shndx == NULL) | |
5230 | goto error_return; | |
5231 | } | |
252b5132 | 5232 | |
13ae64f3 JJ |
5233 | if (finfo.first_tls_sec) |
5234 | { | |
5235 | unsigned int align = 0; | |
5236 | bfd_vma base = finfo.first_tls_sec->vma, end = 0; | |
5237 | asection *sec; | |
5238 | ||
5239 | for (sec = finfo.first_tls_sec; | |
5240 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
5241 | sec = sec->next) | |
5242 | { | |
5243 | bfd_vma size = sec->_raw_size; | |
5244 | ||
5245 | if (bfd_get_section_alignment (abfd, sec) > align) | |
5246 | align = bfd_get_section_alignment (abfd, sec); | |
5247 | if (sec->_raw_size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
5248 | { | |
5249 | struct bfd_link_order *o; | |
5250 | ||
5251 | size = 0; | |
5252 | for (o = sec->link_order_head; o != NULL; o = o->next) | |
5253 | if (size < o->offset + o->size) | |
58821868 | 5254 | size = o->offset + o->size; |
13ae64f3 JJ |
5255 | } |
5256 | end = sec->vma + size; | |
5257 | } | |
5258 | elf_hash_table (info)->tls_segment | |
5259 | = bfd_zalloc (abfd, sizeof (struct elf_link_tls_segment)); | |
5260 | if (elf_hash_table (info)->tls_segment == NULL) | |
5261 | goto error_return; | |
5262 | elf_hash_table (info)->tls_segment->start = base; | |
5263 | elf_hash_table (info)->tls_segment->size = end - base; | |
5264 | elf_hash_table (info)->tls_segment->align = align; | |
5265 | } | |
5266 | ||
252b5132 RH |
5267 | /* Since ELF permits relocations to be against local symbols, we |
5268 | must have the local symbols available when we do the relocations. | |
5269 | Since we would rather only read the local symbols once, and we | |
5270 | would rather not keep them in memory, we handle all the | |
5271 | relocations for a single input file at the same time. | |
5272 | ||
5273 | Unfortunately, there is no way to know the total number of local | |
5274 | symbols until we have seen all of them, and the local symbol | |
5275 | indices precede the global symbol indices. This means that when | |
5276 | we are generating relocateable output, and we see a reloc against | |
5277 | a global symbol, we can not know the symbol index until we have | |
5278 | finished examining all the local symbols to see which ones we are | |
5279 | going to output. To deal with this, we keep the relocations in | |
5280 | memory, and don't output them until the end of the link. This is | |
5281 | an unfortunate waste of memory, but I don't see a good way around | |
5282 | it. Fortunately, it only happens when performing a relocateable | |
5283 | link, which is not the common case. FIXME: If keep_memory is set | |
5284 | we could write the relocs out and then read them again; I don't | |
5285 | know how bad the memory loss will be. */ | |
5286 | ||
5287 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 5288 | sub->output_has_begun = FALSE; |
252b5132 RH |
5289 | for (o = abfd->sections; o != NULL; o = o->next) |
5290 | { | |
5291 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5292 | { | |
5293 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 5294 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 5295 | == bfd_target_elf_flavour) |
a50c1845 | 5296 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 5297 | { |
252b5132 RH |
5298 | if (! sub->output_has_begun) |
5299 | { | |
5300 | if (! elf_link_input_bfd (&finfo, sub)) | |
5301 | goto error_return; | |
b34976b6 | 5302 | sub->output_has_begun = TRUE; |
252b5132 RH |
5303 | } |
5304 | } | |
5305 | else if (p->type == bfd_section_reloc_link_order | |
5306 | || p->type == bfd_symbol_reloc_link_order) | |
5307 | { | |
5308 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5309 | goto error_return; | |
5310 | } | |
5311 | else | |
5312 | { | |
5313 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5314 | goto error_return; | |
5315 | } | |
5316 | } | |
5317 | } | |
5318 | ||
c44233aa AM |
5319 | /* Output any global symbols that got converted to local in a |
5320 | version script or due to symbol visibility. We do this in a | |
5321 | separate step since ELF requires all local symbols to appear | |
5322 | prior to any global symbols. FIXME: We should only do this if | |
5323 | some global symbols were, in fact, converted to become local. | |
5324 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 5325 | eoinfo.failed = FALSE; |
c44233aa | 5326 | eoinfo.finfo = &finfo; |
b34976b6 | 5327 | eoinfo.localsyms = TRUE; |
c44233aa AM |
5328 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5329 | (PTR) &eoinfo); | |
5330 | if (eoinfo.failed) | |
b34976b6 | 5331 | return FALSE; |
c44233aa | 5332 | |
252b5132 | 5333 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
5334 | with the global symbols. Even if we want to strip everything we |
5335 | can, we still need to deal with those global symbols that got | |
3e932841 | 5336 | converted to local in a version script. */ |
252b5132 | 5337 | |
30b30c21 | 5338 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 5339 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 5340 | |
fc8c40a0 AM |
5341 | if (dynamic |
5342 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
5343 | { |
5344 | Elf_Internal_Sym sym; | |
5345 | Elf_External_Sym *dynsym = | |
a7b97311 | 5346 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 5347 | long last_local = 0; |
30b30c21 RH |
5348 | |
5349 | /* Write out the section symbols for the output sections. */ | |
5350 | if (info->shared) | |
5351 | { | |
5352 | asection *s; | |
5353 | ||
5354 | sym.st_size = 0; | |
5355 | sym.st_name = 0; | |
5356 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5357 | sym.st_other = 0; | |
5358 | ||
5359 | for (s = abfd->sections; s != NULL; s = s->next) | |
5360 | { | |
5361 | int indx; | |
9ad5cbcf AM |
5362 | Elf_External_Sym *dest; |
5363 | ||
30b30c21 RH |
5364 | indx = elf_section_data (s)->this_idx; |
5365 | BFD_ASSERT (indx > 0); | |
5366 | sym.st_shndx = indx; | |
5367 | sym.st_value = s->vma; | |
9ad5cbcf AM |
5368 | dest = dynsym + elf_section_data (s)->dynindx; |
5369 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5370 | } |
5371 | ||
5372 | last_local = bfd_count_sections (abfd); | |
5373 | } | |
5374 | ||
5375 | /* Write out the local dynsyms. */ | |
5376 | if (elf_hash_table (info)->dynlocal) | |
5377 | { | |
5378 | struct elf_link_local_dynamic_entry *e; | |
5379 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
5380 | { | |
318da145 | 5381 | asection *s; |
9ad5cbcf | 5382 | Elf_External_Sym *dest; |
30b30c21 | 5383 | |
b037af20 MM |
5384 | sym.st_size = e->isym.st_size; |
5385 | sym.st_other = e->isym.st_other; | |
5386 | ||
1fa0ddb3 RH |
5387 | /* Copy the internal symbol as is. |
5388 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
5389 | the original st_name with the dynstr_index. */ |
5390 | sym = e->isym; | |
30b30c21 | 5391 | |
c8e5ddc8 | 5392 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
5393 | && (e->isym.st_shndx < SHN_LORESERVE |
5394 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
5395 | { |
5396 | s = bfd_section_from_elf_index (e->input_bfd, | |
5397 | e->isym.st_shndx); | |
5398 | ||
5399 | sym.st_shndx = | |
5400 | elf_section_data (s->output_section)->this_idx; | |
5401 | sym.st_value = (s->output_section->vma | |
5402 | + s->output_offset | |
5403 | + e->isym.st_value); | |
5404 | } | |
30b30c21 RH |
5405 | |
5406 | if (last_local < e->dynindx) | |
5407 | last_local = e->dynindx; | |
5408 | ||
9ad5cbcf AM |
5409 | dest = dynsym + e->dynindx; |
5410 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5411 | } |
5412 | } | |
5413 | ||
71a40b32 ILT |
5414 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
5415 | last_local + 1; | |
30b30c21 | 5416 | } |
252b5132 RH |
5417 | |
5418 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
5419 | eoinfo.failed = FALSE; |
5420 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
5421 | eoinfo.finfo = &finfo; |
5422 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
5423 | (PTR) &eoinfo); | |
5424 | if (eoinfo.failed) | |
b34976b6 | 5425 | return FALSE; |
252b5132 | 5426 | |
587ff49e RH |
5427 | /* If backend needs to output some symbols not present in the hash |
5428 | table, do it now. */ | |
5429 | if (bed->elf_backend_output_arch_syms) | |
5430 | { | |
b34976b6 AM |
5431 | typedef bfd_boolean (*out_sym_func) |
5432 | PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *)); | |
dc810e39 AM |
5433 | |
5434 | if (! ((*bed->elf_backend_output_arch_syms) | |
5435 | (abfd, info, (PTR) &finfo, (out_sym_func) elf_link_output_sym))) | |
b34976b6 | 5436 | return FALSE; |
3e932841 | 5437 | } |
587ff49e | 5438 | |
252b5132 RH |
5439 | /* Flush all symbols to the file. */ |
5440 | if (! elf_link_flush_output_syms (&finfo)) | |
b34976b6 | 5441 | return FALSE; |
252b5132 RH |
5442 | |
5443 | /* Now we know the size of the symtab section. */ | |
5444 | off += symtab_hdr->sh_size; | |
5445 | ||
c97e73dd AM |
5446 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
5447 | if (symtab_shndx_hdr->sh_name != 0) | |
5448 | { | |
5449 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
5450 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
5451 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
5452 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
5453 | symtab_shndx_hdr->sh_size = amt; | |
5454 | ||
5455 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 5456 | off, TRUE); |
c97e73dd AM |
5457 | |
5458 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
5459 | || (bfd_bwrite ((PTR) finfo.symshndxbuf, amt, abfd) != amt)) | |
b34976b6 | 5460 | return FALSE; |
c97e73dd AM |
5461 | } |
5462 | ||
5463 | ||
252b5132 RH |
5464 | /* Finish up and write out the symbol string table (.strtab) |
5465 | section. */ | |
5466 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5467 | /* sh_name was set in prep_headers. */ | |
5468 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5469 | symstrtab_hdr->sh_flags = 0; | |
5470 | symstrtab_hdr->sh_addr = 0; | |
5471 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
5472 | symstrtab_hdr->sh_entsize = 0; | |
5473 | symstrtab_hdr->sh_link = 0; | |
5474 | symstrtab_hdr->sh_info = 0; | |
5475 | /* sh_offset is set just below. */ | |
5476 | symstrtab_hdr->sh_addralign = 1; | |
5477 | ||
b34976b6 | 5478 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
5479 | elf_tdata (abfd)->next_file_pos = off; |
5480 | ||
5481 | if (bfd_get_symcount (abfd) > 0) | |
5482 | { | |
5483 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
5484 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 5485 | return FALSE; |
252b5132 RH |
5486 | } |
5487 | ||
5488 | /* Adjust the relocs to have the correct symbol indices. */ | |
5489 | for (o = abfd->sections; o != NULL; o = o->next) | |
5490 | { | |
252b5132 RH |
5491 | if ((o->flags & SEC_RELOC) == 0) |
5492 | continue; | |
5493 | ||
3e932841 | 5494 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
5495 | elf_section_data (o)->rel_count, |
5496 | elf_section_data (o)->rel_hashes); | |
5497 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
5498 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
5499 | elf_section_data (o)->rel_count2, | |
3e932841 | 5500 | (elf_section_data (o)->rel_hashes |
31367b81 | 5501 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
5502 | |
5503 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5504 | trying to swap the relocs out itself. */ | |
5505 | o->reloc_count = 0; | |
5506 | } | |
5507 | ||
db6751f2 JJ |
5508 | if (dynamic && info->combreloc && dynobj != NULL) |
5509 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
5510 | ||
252b5132 RH |
5511 | /* If we are linking against a dynamic object, or generating a |
5512 | shared library, finish up the dynamic linking information. */ | |
5513 | if (dynamic) | |
5514 | { | |
5515 | Elf_External_Dyn *dyncon, *dynconend; | |
5516 | ||
5517 | /* Fix up .dynamic entries. */ | |
5518 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5519 | BFD_ASSERT (o != NULL); | |
5520 | ||
5521 | dyncon = (Elf_External_Dyn *) o->contents; | |
5522 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5523 | for (; dyncon < dynconend; dyncon++) | |
5524 | { | |
5525 | Elf_Internal_Dyn dyn; | |
5526 | const char *name; | |
5527 | unsigned int type; | |
5528 | ||
5529 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5530 | ||
5531 | switch (dyn.d_tag) | |
5532 | { | |
5533 | default: | |
5534 | break; | |
db6751f2 JJ |
5535 | case DT_NULL: |
5536 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
5537 | { | |
5538 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
5539 | { | |
5540 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
5541 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
5542 | default: break; | |
5543 | } | |
5544 | if (dyn.d_tag != DT_NULL) | |
5545 | { | |
5546 | dyn.d_un.d_val = relativecount; | |
5547 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5548 | relativecount = 0; | |
5549 | } | |
5550 | } | |
5551 | break; | |
252b5132 | 5552 | case DT_INIT: |
f0c2e336 | 5553 | name = info->init_function; |
252b5132 RH |
5554 | goto get_sym; |
5555 | case DT_FINI: | |
f0c2e336 | 5556 | name = info->fini_function; |
252b5132 RH |
5557 | get_sym: |
5558 | { | |
5559 | struct elf_link_hash_entry *h; | |
5560 | ||
5561 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 5562 | FALSE, FALSE, TRUE); |
252b5132 RH |
5563 | if (h != NULL |
5564 | && (h->root.type == bfd_link_hash_defined | |
5565 | || h->root.type == bfd_link_hash_defweak)) | |
5566 | { | |
5567 | dyn.d_un.d_val = h->root.u.def.value; | |
5568 | o = h->root.u.def.section; | |
5569 | if (o->output_section != NULL) | |
5570 | dyn.d_un.d_val += (o->output_section->vma | |
5571 | + o->output_offset); | |
5572 | else | |
5573 | { | |
5574 | /* The symbol is imported from another shared | |
5575 | library and does not apply to this one. */ | |
5576 | dyn.d_un.d_val = 0; | |
5577 | } | |
5578 | ||
5579 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5580 | } | |
5581 | } | |
5582 | break; | |
5583 | ||
30831527 RH |
5584 | case DT_PREINIT_ARRAYSZ: |
5585 | name = ".preinit_array"; | |
5586 | goto get_size; | |
5587 | case DT_INIT_ARRAYSZ: | |
5588 | name = ".init_array"; | |
5589 | goto get_size; | |
5590 | case DT_FINI_ARRAYSZ: | |
5591 | name = ".fini_array"; | |
5592 | get_size: | |
5593 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5594 | if (o == NULL) |
5595 | { | |
5596 | (*_bfd_error_handler) | |
5597 | (_("%s: could not find output section %s"), | |
5598 | bfd_get_filename (abfd), name); | |
5599 | goto error_return; | |
5600 | } | |
25e27870 L |
5601 | if (o->_raw_size == 0) |
5602 | (*_bfd_error_handler) | |
5603 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
5604 | dyn.d_un.d_val = o->_raw_size; |
5605 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5606 | break; | |
5607 | ||
5608 | case DT_PREINIT_ARRAY: | |
5609 | name = ".preinit_array"; | |
5610 | goto get_vma; | |
5611 | case DT_INIT_ARRAY: | |
5612 | name = ".init_array"; | |
5613 | goto get_vma; | |
5614 | case DT_FINI_ARRAY: | |
5615 | name = ".fini_array"; | |
5616 | goto get_vma; | |
5617 | ||
252b5132 RH |
5618 | case DT_HASH: |
5619 | name = ".hash"; | |
5620 | goto get_vma; | |
5621 | case DT_STRTAB: | |
5622 | name = ".dynstr"; | |
5623 | goto get_vma; | |
5624 | case DT_SYMTAB: | |
5625 | name = ".dynsym"; | |
5626 | goto get_vma; | |
5627 | case DT_VERDEF: | |
5628 | name = ".gnu.version_d"; | |
5629 | goto get_vma; | |
5630 | case DT_VERNEED: | |
5631 | name = ".gnu.version_r"; | |
5632 | goto get_vma; | |
5633 | case DT_VERSYM: | |
5634 | name = ".gnu.version"; | |
5635 | get_vma: | |
5636 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5637 | if (o == NULL) |
5638 | { | |
5639 | (*_bfd_error_handler) | |
5640 | (_("%s: could not find output section %s"), | |
5641 | bfd_get_filename (abfd), name); | |
5642 | goto error_return; | |
5643 | } | |
252b5132 RH |
5644 | dyn.d_un.d_ptr = o->vma; |
5645 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5646 | break; | |
5647 | ||
5648 | case DT_REL: | |
5649 | case DT_RELA: | |
5650 | case DT_RELSZ: | |
5651 | case DT_RELASZ: | |
5652 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5653 | type = SHT_REL; | |
5654 | else | |
5655 | type = SHT_RELA; | |
5656 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 5657 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5658 | { |
5659 | Elf_Internal_Shdr *hdr; | |
5660 | ||
5661 | hdr = elf_elfsections (abfd)[i]; | |
5662 | if (hdr->sh_type == type | |
5663 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5664 | { | |
5665 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5666 | dyn.d_un.d_val += hdr->sh_size; | |
5667 | else | |
5668 | { | |
5669 | if (dyn.d_un.d_val == 0 | |
5670 | || hdr->sh_addr < dyn.d_un.d_val) | |
5671 | dyn.d_un.d_val = hdr->sh_addr; | |
5672 | } | |
5673 | } | |
5674 | } | |
5675 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5676 | break; | |
5677 | } | |
5678 | } | |
5679 | } | |
5680 | ||
5681 | /* If we have created any dynamic sections, then output them. */ | |
5682 | if (dynobj != NULL) | |
5683 | { | |
5684 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5685 | goto error_return; | |
5686 | ||
5687 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5688 | { | |
5689 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
5690 | || o->_raw_size == 0 |
5691 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
5692 | continue; |
5693 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
5694 | { | |
5695 | /* At this point, we are only interested in sections | |
c44233aa | 5696 | created by elf_link_create_dynamic_sections. */ |
252b5132 RH |
5697 | continue; |
5698 | } | |
5699 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
5700 | != SHT_STRTAB) | |
5701 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
5702 | { | |
5703 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
5704 | o->contents, |
5705 | (file_ptr) o->output_offset, | |
252b5132 RH |
5706 | o->_raw_size)) |
5707 | goto error_return; | |
5708 | } | |
5709 | else | |
5710 | { | |
252b5132 | 5711 | /* The contents of the .dynstr section are actually in a |
c44233aa | 5712 | stringtab. */ |
252b5132 RH |
5713 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
5714 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
5715 | || ! _bfd_elf_strtab_emit (abfd, |
5716 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
5717 | goto error_return; |
5718 | } | |
5719 | } | |
5720 | } | |
5721 | ||
1126897b AM |
5722 | if (info->relocateable) |
5723 | { | |
b34976b6 | 5724 | bfd_boolean failed = FALSE; |
1126897b AM |
5725 | |
5726 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
5727 | if (failed) | |
5728 | goto error_return; | |
5729 | } | |
5730 | ||
252b5132 RH |
5731 | /* If we have optimized stabs strings, output them. */ |
5732 | if (elf_hash_table (info)->stab_info != NULL) | |
5733 | { | |
5734 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
5735 | goto error_return; | |
5736 | } | |
5737 | ||
126495ed | 5738 | if (info->eh_frame_hdr) |
65765700 | 5739 | { |
126495ed AM |
5740 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
5741 | goto error_return; | |
65765700 JJ |
5742 | } |
5743 | ||
252b5132 RH |
5744 | if (finfo.symstrtab != NULL) |
5745 | _bfd_stringtab_free (finfo.symstrtab); | |
5746 | if (finfo.contents != NULL) | |
5747 | free (finfo.contents); | |
5748 | if (finfo.external_relocs != NULL) | |
5749 | free (finfo.external_relocs); | |
5750 | if (finfo.internal_relocs != NULL) | |
5751 | free (finfo.internal_relocs); | |
5752 | if (finfo.external_syms != NULL) | |
5753 | free (finfo.external_syms); | |
9ad5cbcf AM |
5754 | if (finfo.locsym_shndx != NULL) |
5755 | free (finfo.locsym_shndx); | |
252b5132 RH |
5756 | if (finfo.internal_syms != NULL) |
5757 | free (finfo.internal_syms); | |
5758 | if (finfo.indices != NULL) | |
5759 | free (finfo.indices); | |
5760 | if (finfo.sections != NULL) | |
5761 | free (finfo.sections); | |
5762 | if (finfo.symbuf != NULL) | |
5763 | free (finfo.symbuf); | |
9ad5cbcf | 5764 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5765 | free (finfo.symshndxbuf); |
252b5132 RH |
5766 | for (o = abfd->sections; o != NULL; o = o->next) |
5767 | { | |
5768 | if ((o->flags & SEC_RELOC) != 0 | |
5769 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 5770 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
5771 | } |
5772 | ||
b34976b6 | 5773 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 5774 | |
b34976b6 | 5775 | return TRUE; |
252b5132 RH |
5776 | |
5777 | error_return: | |
5778 | if (finfo.symstrtab != NULL) | |
5779 | _bfd_stringtab_free (finfo.symstrtab); | |
5780 | if (finfo.contents != NULL) | |
5781 | free (finfo.contents); | |
5782 | if (finfo.external_relocs != NULL) | |
5783 | free (finfo.external_relocs); | |
5784 | if (finfo.internal_relocs != NULL) | |
5785 | free (finfo.internal_relocs); | |
5786 | if (finfo.external_syms != NULL) | |
5787 | free (finfo.external_syms); | |
9ad5cbcf AM |
5788 | if (finfo.locsym_shndx != NULL) |
5789 | free (finfo.locsym_shndx); | |
252b5132 RH |
5790 | if (finfo.internal_syms != NULL) |
5791 | free (finfo.internal_syms); | |
5792 | if (finfo.indices != NULL) | |
5793 | free (finfo.indices); | |
5794 | if (finfo.sections != NULL) | |
5795 | free (finfo.sections); | |
5796 | if (finfo.symbuf != NULL) | |
5797 | free (finfo.symbuf); | |
9ad5cbcf | 5798 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5799 | free (finfo.symshndxbuf); |
252b5132 RH |
5800 | for (o = abfd->sections; o != NULL; o = o->next) |
5801 | { | |
5802 | if ((o->flags & SEC_RELOC) != 0 | |
5803 | && elf_section_data (o)->rel_hashes != NULL) | |
5804 | free (elf_section_data (o)->rel_hashes); | |
5805 | } | |
5806 | ||
b34976b6 | 5807 | return FALSE; |
252b5132 RH |
5808 | } |
5809 | ||
5810 | /* Add a symbol to the output symbol table. */ | |
5811 | ||
b34976b6 | 5812 | static bfd_boolean |
252b5132 RH |
5813 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
5814 | struct elf_final_link_info *finfo; | |
5815 | const char *name; | |
5816 | Elf_Internal_Sym *elfsym; | |
5817 | asection *input_sec; | |
5818 | { | |
9ad5cbcf AM |
5819 | Elf_External_Sym *dest; |
5820 | Elf_External_Sym_Shndx *destshndx; | |
b34976b6 AM |
5821 | bfd_boolean (*output_symbol_hook) |
5822 | PARAMS ((bfd *, struct bfd_link_info *info, const char *, | |
5823 | Elf_Internal_Sym *, asection *)); | |
252b5132 RH |
5824 | |
5825 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5826 | elf_backend_link_output_symbol_hook; | |
5827 | if (output_symbol_hook != NULL) | |
5828 | { | |
5829 | if (! ((*output_symbol_hook) | |
5830 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
b34976b6 | 5831 | return FALSE; |
252b5132 RH |
5832 | } |
5833 | ||
5834 | if (name == (const char *) NULL || *name == '\0') | |
5835 | elfsym->st_name = 0; | |
5836 | else if (input_sec->flags & SEC_EXCLUDE) | |
5837 | elfsym->st_name = 0; | |
5838 | else | |
5839 | { | |
5840 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 5841 | name, TRUE, FALSE); |
252b5132 | 5842 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 5843 | return FALSE; |
252b5132 RH |
5844 | } |
5845 | ||
5846 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5847 | { | |
5848 | if (! elf_link_flush_output_syms (finfo)) | |
b34976b6 | 5849 | return FALSE; |
252b5132 RH |
5850 | } |
5851 | ||
9ad5cbcf AM |
5852 | dest = finfo->symbuf + finfo->symbuf_count; |
5853 | destshndx = finfo->symshndxbuf; | |
5854 | if (destshndx != NULL) | |
c97e73dd AM |
5855 | { |
5856 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
5857 | { | |
5858 | bfd_size_type amt; | |
252b5132 | 5859 | |
c97e73dd AM |
5860 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
5861 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
5862 | if (destshndx == NULL) | |
b34976b6 | 5863 | return FALSE; |
c97e73dd AM |
5864 | memset ((char *) destshndx + amt, 0, amt); |
5865 | finfo->shndxbuf_size *= 2; | |
5866 | } | |
5867 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
5868 | } | |
5869 | ||
5870 | elf_swap_symbol_out (finfo->output_bfd, elfsym, (PTR) dest, (PTR) destshndx); | |
5871 | finfo->symbuf_count += 1; | |
5872 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 5873 | |
b34976b6 | 5874 | return TRUE; |
252b5132 RH |
5875 | } |
5876 | ||
5877 | /* Flush the output symbols to the file. */ | |
5878 | ||
b34976b6 | 5879 | static bfd_boolean |
252b5132 RH |
5880 | elf_link_flush_output_syms (finfo) |
5881 | struct elf_final_link_info *finfo; | |
5882 | { | |
5883 | if (finfo->symbuf_count > 0) | |
5884 | { | |
9ad5cbcf | 5885 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
5886 | file_ptr pos; |
5887 | bfd_size_type amt; | |
252b5132 | 5888 | |
9ad5cbcf AM |
5889 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
5890 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
5891 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
5892 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
5893 | || bfd_bwrite ((PTR) finfo->symbuf, amt, finfo->output_bfd) != amt) | |
b34976b6 | 5894 | return FALSE; |
252b5132 | 5895 | |
9ad5cbcf | 5896 | hdr->sh_size += amt; |
252b5132 RH |
5897 | finfo->symbuf_count = 0; |
5898 | } | |
5899 | ||
b34976b6 | 5900 | return TRUE; |
252b5132 RH |
5901 | } |
5902 | ||
f5fa8ca2 JJ |
5903 | /* Adjust all external symbols pointing into SEC_MERGE sections |
5904 | to reflect the object merging within the sections. */ | |
5905 | ||
b34976b6 | 5906 | static bfd_boolean |
f5fa8ca2 JJ |
5907 | elf_link_sec_merge_syms (h, data) |
5908 | struct elf_link_hash_entry *h; | |
5909 | PTR data; | |
5910 | { | |
5911 | asection *sec; | |
5912 | ||
e92d460e AM |
5913 | if (h->root.type == bfd_link_hash_warning) |
5914 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5915 | ||
f5fa8ca2 JJ |
5916 | if ((h->root.type == bfd_link_hash_defined |
5917 | || h->root.type == bfd_link_hash_defweak) | |
5918 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
68bfbfcc | 5919 | && sec->sec_info_type == ELF_INFO_TYPE_MERGE) |
f5fa8ca2 JJ |
5920 | { |
5921 | bfd *output_bfd = (bfd *) data; | |
5922 | ||
5923 | h->root.u.def.value = | |
5924 | _bfd_merged_section_offset (output_bfd, | |
5925 | &h->root.u.def.section, | |
65765700 | 5926 | elf_section_data (sec)->sec_info, |
f5fa8ca2 JJ |
5927 | h->root.u.def.value, (bfd_vma) 0); |
5928 | } | |
5929 | ||
b34976b6 | 5930 | return TRUE; |
f5fa8ca2 JJ |
5931 | } |
5932 | ||
f5d44ba0 AM |
5933 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
5934 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
5935 | versioned symbol that would normally require an explicit version. */ | |
5936 | ||
b34976b6 | 5937 | static bfd_boolean |
f5d44ba0 AM |
5938 | elf_link_check_versioned_symbol (info, h) |
5939 | struct bfd_link_info *info; | |
5940 | struct elf_link_hash_entry *h; | |
5941 | { | |
5942 | bfd *undef_bfd = h->root.u.undef.abfd; | |
5943 | struct elf_link_loaded_list *loaded; | |
f5d44ba0 AM |
5944 | |
5945 | if ((undef_bfd->flags & DYNAMIC) == 0 | |
5946 | || info->hash->creator->flavour != bfd_target_elf_flavour | |
5947 | || elf_dt_soname (h->root.u.undef.abfd) == NULL) | |
b34976b6 | 5948 | return FALSE; |
f5d44ba0 AM |
5949 | |
5950 | for (loaded = elf_hash_table (info)->loaded; | |
5951 | loaded != NULL; | |
5952 | loaded = loaded->next) | |
5953 | { | |
5954 | bfd *input; | |
5955 | Elf_Internal_Shdr *hdr; | |
5956 | bfd_size_type symcount; | |
5957 | bfd_size_type extsymcount; | |
5958 | bfd_size_type extsymoff; | |
5959 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
5960 | Elf_Internal_Sym *isym; |
5961 | Elf_Internal_Sym *isymend; | |
5962 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 5963 | Elf_External_Versym *ever; |
6cdc0ccc | 5964 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
5965 | |
5966 | input = loaded->abfd; | |
5967 | ||
5968 | /* We check each DSO for a possible hidden versioned definition. */ | |
5969 | if (input == undef_bfd | |
5970 | || (input->flags & DYNAMIC) == 0 | |
5971 | || elf_dynversym (input) == 0) | |
5972 | continue; | |
5973 | ||
5974 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
5975 | ||
5976 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
5977 | if (elf_bad_symtab (input)) | |
5978 | { | |
5979 | extsymcount = symcount; | |
5980 | extsymoff = 0; | |
5981 | } | |
5982 | else | |
5983 | { | |
5984 | extsymcount = symcount - hdr->sh_info; | |
5985 | extsymoff = hdr->sh_info; | |
5986 | } | |
5987 | ||
5988 | if (extsymcount == 0) | |
5989 | continue; | |
5990 | ||
6cdc0ccc AM |
5991 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
5992 | NULL, NULL, NULL); | |
5993 | if (isymbuf == NULL) | |
b34976b6 | 5994 | return FALSE; |
f5d44ba0 | 5995 | |
f5d44ba0 AM |
5996 | /* Read in any version definitions. */ |
5997 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
5998 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
5999 | if (extversym == NULL) | |
6000 | goto error_ret; | |
6001 | ||
6002 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
6003 | || (bfd_bread ((PTR) extversym, versymhdr->sh_size, input) | |
6004 | != versymhdr->sh_size)) | |
6005 | { | |
6006 | free (extversym); | |
6007 | error_ret: | |
6cdc0ccc | 6008 | free (isymbuf); |
b34976b6 | 6009 | return FALSE; |
f5d44ba0 AM |
6010 | } |
6011 | ||
6012 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
6013 | isymend = isymbuf + extsymcount; |
6014 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
6015 | { |
6016 | const char *name; | |
f5d44ba0 AM |
6017 | Elf_Internal_Versym iver; |
6018 | ||
6cdc0ccc AM |
6019 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
6020 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
6021 | continue; |
6022 | ||
6023 | name = bfd_elf_string_from_elf_section (input, | |
6024 | hdr->sh_link, | |
6cdc0ccc | 6025 | isym->st_name); |
f5d44ba0 AM |
6026 | if (strcmp (name, h->root.root.string) != 0) |
6027 | continue; | |
6028 | ||
6029 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
6030 | ||
6031 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
6032 | { | |
6033 | /* If we have a non-hidden versioned sym, then it should | |
6034 | have provided a definition for the undefined sym. */ | |
6035 | abort (); | |
6036 | } | |
6037 | ||
6038 | if ((iver.vs_vers & VERSYM_VERSION) == 2) | |
6039 | { | |
6040 | /* This is the oldest (default) sym. We can use it. */ | |
6041 | free (extversym); | |
6cdc0ccc | 6042 | free (isymbuf); |
b34976b6 | 6043 | return TRUE; |
f5d44ba0 AM |
6044 | } |
6045 | } | |
6046 | ||
6047 | free (extversym); | |
6cdc0ccc | 6048 | free (isymbuf); |
f5d44ba0 AM |
6049 | } |
6050 | ||
b34976b6 | 6051 | return FALSE; |
f5d44ba0 AM |
6052 | } |
6053 | ||
252b5132 RH |
6054 | /* Add an external symbol to the symbol table. This is called from |
6055 | the hash table traversal routine. When generating a shared object, | |
6056 | we go through the symbol table twice. The first time we output | |
6057 | anything that might have been forced to local scope in a version | |
6058 | script. The second time we output the symbols that are still | |
6059 | global symbols. */ | |
6060 | ||
b34976b6 | 6061 | static bfd_boolean |
252b5132 RH |
6062 | elf_link_output_extsym (h, data) |
6063 | struct elf_link_hash_entry *h; | |
6064 | PTR data; | |
6065 | { | |
6066 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; | |
6067 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
b34976b6 | 6068 | bfd_boolean strip; |
252b5132 RH |
6069 | Elf_Internal_Sym sym; |
6070 | asection *input_sec; | |
6071 | ||
e92d460e AM |
6072 | if (h->root.type == bfd_link_hash_warning) |
6073 | { | |
6074 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6075 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 6076 | return TRUE; |
e92d460e AM |
6077 | } |
6078 | ||
252b5132 RH |
6079 | /* Decide whether to output this symbol in this pass. */ |
6080 | if (eoinfo->localsyms) | |
6081 | { | |
6082 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6083 | return TRUE; |
252b5132 RH |
6084 | } |
6085 | else | |
6086 | { | |
6087 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 6088 | return TRUE; |
252b5132 RH |
6089 | } |
6090 | ||
6091 | /* If we are not creating a shared library, and this symbol is | |
6092 | referenced by a shared library but is not defined anywhere, then | |
6093 | warn that it is undefined. If we do not do this, the runtime | |
6094 | linker will complain that the symbol is undefined when the | |
6095 | program is run. We don't have to worry about symbols that are | |
6096 | referenced by regular files, because we will already have issued | |
6097 | warnings for them. */ | |
6098 | if (! finfo->info->relocateable | |
b79e8c78 | 6099 | && ! finfo->info->allow_shlib_undefined |
e45bf863 | 6100 | && ! finfo->info->shared |
252b5132 RH |
6101 | && h->root.type == bfd_link_hash_undefined |
6102 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
f5d44ba0 AM |
6103 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
6104 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
252b5132 RH |
6105 | { |
6106 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6107 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
b34976b6 | 6108 | (asection *) NULL, (bfd_vma) 0, TRUE))) |
252b5132 | 6109 | { |
b34976b6 AM |
6110 | eoinfo->failed = TRUE; |
6111 | return FALSE; | |
252b5132 RH |
6112 | } |
6113 | } | |
6114 | ||
6115 | /* We don't want to output symbols that have never been mentioned by | |
6116 | a regular file, or that we have been told to strip. However, if | |
6117 | h->indx is set to -2, the symbol is used by a reloc and we must | |
6118 | output it. */ | |
6119 | if (h->indx == -2) | |
b34976b6 | 6120 | strip = FALSE; |
252b5132 RH |
6121 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
6122 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
6123 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
6124 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 6125 | strip = TRUE; |
75828352 AM |
6126 | else if (finfo->info->strip == strip_all) |
6127 | strip = TRUE; | |
6128 | else if (finfo->info->strip == strip_some | |
6129 | && bfd_hash_lookup (finfo->info->keep_hash, | |
6130 | h->root.root.string, FALSE, FALSE) == NULL) | |
6131 | strip = TRUE; | |
6132 | else if (finfo->info->strip_discarded | |
6133 | && (h->root.type == bfd_link_hash_defined | |
6134 | || h->root.type == bfd_link_hash_defweak) | |
6135 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 6136 | strip = TRUE; |
252b5132 | 6137 | else |
b34976b6 | 6138 | strip = FALSE; |
252b5132 RH |
6139 | |
6140 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
6141 | nothing else to do unless it is a forced local symbol. */ |
6142 | if (strip | |
6143 | && h->dynindx == -1 | |
6144 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6145 | return TRUE; |
252b5132 RH |
6146 | |
6147 | sym.st_value = 0; | |
6148 | sym.st_size = h->size; | |
6149 | sym.st_other = h->other; | |
6150 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
6151 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
6152 | else if (h->root.type == bfd_link_hash_undefweak | |
6153 | || h->root.type == bfd_link_hash_defweak) | |
6154 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
6155 | else | |
6156 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6157 | ||
6158 | switch (h->root.type) | |
6159 | { | |
6160 | default: | |
6161 | case bfd_link_hash_new: | |
e92d460e | 6162 | case bfd_link_hash_warning: |
252b5132 | 6163 | abort (); |
b34976b6 | 6164 | return FALSE; |
252b5132 RH |
6165 | |
6166 | case bfd_link_hash_undefined: | |
252b5132 RH |
6167 | case bfd_link_hash_undefweak: |
6168 | input_sec = bfd_und_section_ptr; | |
6169 | sym.st_shndx = SHN_UNDEF; | |
6170 | break; | |
6171 | ||
6172 | case bfd_link_hash_defined: | |
6173 | case bfd_link_hash_defweak: | |
6174 | { | |
6175 | input_sec = h->root.u.def.section; | |
6176 | if (input_sec->output_section != NULL) | |
6177 | { | |
6178 | sym.st_shndx = | |
6179 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
6180 | input_sec->output_section); | |
9ad5cbcf | 6181 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
6182 | { |
6183 | (*_bfd_error_handler) | |
6184 | (_("%s: could not find output section %s for input section %s"), | |
6185 | bfd_get_filename (finfo->output_bfd), | |
6186 | input_sec->output_section->name, | |
6187 | input_sec->name); | |
b34976b6 AM |
6188 | eoinfo->failed = TRUE; |
6189 | return FALSE; | |
252b5132 RH |
6190 | } |
6191 | ||
6192 | /* ELF symbols in relocateable files are section relative, | |
6193 | but in nonrelocateable files they are virtual | |
6194 | addresses. */ | |
6195 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
6196 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6197 | { |
6198 | sym.st_value += input_sec->output_section->vma; | |
6199 | if (h->type == STT_TLS) | |
6200 | { | |
6201 | /* STT_TLS symbols are relative to PT_TLS segment | |
6202 | base. */ | |
6203 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6204 | sym.st_value -= finfo->first_tls_sec->vma; | |
6205 | } | |
6206 | } | |
252b5132 RH |
6207 | } |
6208 | else | |
6209 | { | |
6210 | BFD_ASSERT (input_sec->owner == NULL | |
6211 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
6212 | sym.st_shndx = SHN_UNDEF; | |
6213 | input_sec = bfd_und_section_ptr; | |
6214 | } | |
6215 | } | |
6216 | break; | |
6217 | ||
6218 | case bfd_link_hash_common: | |
6219 | input_sec = h->root.u.c.p->section; | |
6220 | sym.st_shndx = SHN_COMMON; | |
6221 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
6222 | break; | |
6223 | ||
6224 | case bfd_link_hash_indirect: | |
6225 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
6226 | to the decorated version of the name. For example, if the |
6227 | symbol foo@@GNU_1.2 is the default, which should be used when | |
6228 | foo is used with no version, then we add an indirect symbol | |
6229 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
6230 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 6231 | return TRUE; |
252b5132 RH |
6232 | } |
6233 | ||
6234 | /* Give the processor backend a chance to tweak the symbol value, | |
6235 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
6236 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
6237 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
6238 | if ((h->dynindx != -1 |
6239 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
c44233aa AM |
6240 | && (finfo->info->shared |
6241 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
6242 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
6243 | { | |
6244 | struct elf_backend_data *bed; | |
6245 | ||
6246 | bed = get_elf_backend_data (finfo->output_bfd); | |
6247 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
6248 | (finfo->output_bfd, finfo->info, h, &sym))) | |
6249 | { | |
b34976b6 AM |
6250 | eoinfo->failed = TRUE; |
6251 | return FALSE; | |
252b5132 RH |
6252 | } |
6253 | } | |
6254 | ||
6255 | /* If we are marking the symbol as undefined, and there are no | |
6256 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
6257 | mark the symbol as weak undefined; if there are non-weak |
6258 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
6259 | because it might not be marked as undefined until the |
6260 | finish_dynamic_symbol routine gets through with it. */ | |
6261 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 6262 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
6263 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
6264 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
6265 | { |
6266 | int bindtype; | |
6267 | ||
6268 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
6269 | bindtype = STB_GLOBAL; | |
6270 | else | |
6271 | bindtype = STB_WEAK; | |
6272 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
6273 | } | |
252b5132 | 6274 | |
7c25b72c | 6275 | /* If a symbol is not defined locally, we clear the visibility field. */ |
2cd533b7 L |
6276 | if (! finfo->info->relocateable |
6277 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
7c25b72c | 6278 | sym.st_other &= ~ ELF_ST_VISIBILITY (-1); |
32c092c3 | 6279 | |
252b5132 | 6280 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
6281 | there now. We already know the symbol index. We also fill in |
6282 | the entry in the .hash section. */ | |
252b5132 RH |
6283 | if (h->dynindx != -1 |
6284 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
6285 | { | |
6286 | size_t bucketcount; | |
6287 | size_t bucket; | |
c7ac6ff8 | 6288 | size_t hash_entry_size; |
252b5132 RH |
6289 | bfd_byte *bucketpos; |
6290 | bfd_vma chain; | |
dc810e39 | 6291 | Elf_External_Sym *esym; |
252b5132 RH |
6292 | |
6293 | sym.st_name = h->dynstr_index; | |
dc810e39 | 6294 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
9ad5cbcf | 6295 | elf_swap_symbol_out (finfo->output_bfd, &sym, (PTR) esym, (PTR) 0); |
252b5132 RH |
6296 | |
6297 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
6298 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 6299 | hash_entry_size |
c7ac6ff8 | 6300 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 6301 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
6302 | + (bucket + 2) * hash_entry_size); |
6303 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
dc810e39 AM |
6304 | bfd_put (8 * hash_entry_size, finfo->output_bfd, (bfd_vma) h->dynindx, |
6305 | bucketpos); | |
c7ac6ff8 MM |
6306 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
6307 | ((bfd_byte *) finfo->hash_sec->contents | |
6308 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
6309 | |
6310 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
6311 | { | |
6312 | Elf_Internal_Versym iversym; | |
dc810e39 | 6313 | Elf_External_Versym *eversym; |
252b5132 RH |
6314 | |
6315 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
6316 | { | |
6317 | if (h->verinfo.verdef == NULL) | |
6318 | iversym.vs_vers = 0; | |
6319 | else | |
6320 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
6321 | } | |
6322 | else | |
6323 | { | |
6324 | if (h->verinfo.vertree == NULL) | |
6325 | iversym.vs_vers = 1; | |
6326 | else | |
6327 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
6328 | } | |
6329 | ||
6330 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
6331 | iversym.vs_vers |= VERSYM_HIDDEN; | |
6332 | ||
dc810e39 AM |
6333 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
6334 | eversym += h->dynindx; | |
6335 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
6336 | } |
6337 | } | |
6338 | ||
6339 | /* If we're stripping it, then it was just a dynamic symbol, and | |
6340 | there's nothing else to do. */ | |
7330fb86 | 6341 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 6342 | return TRUE; |
252b5132 RH |
6343 | |
6344 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
6345 | ||
6346 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
6347 | { | |
b34976b6 AM |
6348 | eoinfo->failed = TRUE; |
6349 | return FALSE; | |
252b5132 RH |
6350 | } |
6351 | ||
b34976b6 | 6352 | return TRUE; |
252b5132 RH |
6353 | } |
6354 | ||
23bc299b MM |
6355 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which |
6356 | originated from the section given by INPUT_REL_HDR) to the | |
6357 | OUTPUT_BFD. */ | |
6358 | ||
b34976b6 | 6359 | static bfd_boolean |
3e932841 | 6360 | elf_link_output_relocs (output_bfd, input_section, input_rel_hdr, |
23bc299b MM |
6361 | internal_relocs) |
6362 | bfd *output_bfd; | |
6363 | asection *input_section; | |
6364 | Elf_Internal_Shdr *input_rel_hdr; | |
6365 | Elf_Internal_Rela *internal_relocs; | |
6366 | { | |
6367 | Elf_Internal_Rela *irela; | |
6368 | Elf_Internal_Rela *irelaend; | |
947216bf | 6369 | bfd_byte *erel; |
23bc299b MM |
6370 | Elf_Internal_Shdr *output_rel_hdr; |
6371 | asection *output_section; | |
7442e600 | 6372 | unsigned int *rel_countp = NULL; |
32f0787a | 6373 | struct elf_backend_data *bed; |
947216bf | 6374 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); |
23bc299b MM |
6375 | |
6376 | output_section = input_section->output_section; | |
6377 | output_rel_hdr = NULL; | |
6378 | ||
3e932841 | 6379 | if (elf_section_data (output_section)->rel_hdr.sh_entsize |
23bc299b MM |
6380 | == input_rel_hdr->sh_entsize) |
6381 | { | |
6382 | output_rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6383 | rel_countp = &elf_section_data (output_section)->rel_count; | |
6384 | } | |
6385 | else if (elf_section_data (output_section)->rel_hdr2 | |
6386 | && (elf_section_data (output_section)->rel_hdr2->sh_entsize | |
6387 | == input_rel_hdr->sh_entsize)) | |
6388 | { | |
6389 | output_rel_hdr = elf_section_data (output_section)->rel_hdr2; | |
6390 | rel_countp = &elf_section_data (output_section)->rel_count2; | |
6391 | } | |
41241523 TS |
6392 | else |
6393 | { | |
58821868 AM |
6394 | (*_bfd_error_handler) |
6395 | (_("%s: relocation size mismatch in %s section %s"), | |
6396 | bfd_get_filename (output_bfd), | |
6397 | bfd_archive_filename (input_section->owner), | |
6398 | input_section->name); | |
41241523 | 6399 | bfd_set_error (bfd_error_wrong_object_format); |
b34976b6 | 6400 | return FALSE; |
41241523 | 6401 | } |
32f0787a UC |
6402 | |
6403 | bed = get_elf_backend_data (output_bfd); | |
947216bf AM |
6404 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
6405 | swap_out = bed->s->swap_reloc_out; | |
6406 | else if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
6407 | swap_out = bed->s->swap_reloca_out; | |
6408 | else | |
6409 | abort (); | |
6410 | ||
6411 | erel = output_rel_hdr->contents; | |
6412 | erel += *rel_countp * input_rel_hdr->sh_entsize; | |
23bc299b | 6413 | irela = internal_relocs; |
58821868 AM |
6414 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) |
6415 | * bed->s->int_rels_per_ext_rel); | |
947216bf | 6416 | while (irela < irelaend) |
23bc299b | 6417 | { |
947216bf AM |
6418 | (*swap_out) (output_bfd, irela, erel); |
6419 | irela += bed->s->int_rels_per_ext_rel; | |
6420 | erel += input_rel_hdr->sh_entsize; | |
23bc299b MM |
6421 | } |
6422 | ||
6423 | /* Bump the counter, so that we know where to add the next set of | |
6424 | relocations. */ | |
d9bc7a44 | 6425 | *rel_countp += NUM_SHDR_ENTRIES (input_rel_hdr); |
41241523 | 6426 | |
b34976b6 | 6427 | return TRUE; |
23bc299b MM |
6428 | } |
6429 | ||
252b5132 RH |
6430 | /* Link an input file into the linker output file. This function |
6431 | handles all the sections and relocations of the input file at once. | |
6432 | This is so that we only have to read the local symbols once, and | |
6433 | don't have to keep them in memory. */ | |
6434 | ||
b34976b6 | 6435 | static bfd_boolean |
252b5132 RH |
6436 | elf_link_input_bfd (finfo, input_bfd) |
6437 | struct elf_final_link_info *finfo; | |
6438 | bfd *input_bfd; | |
6439 | { | |
b34976b6 AM |
6440 | bfd_boolean (*relocate_section) |
6441 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
6442 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
252b5132 RH |
6443 | bfd *output_bfd; |
6444 | Elf_Internal_Shdr *symtab_hdr; | |
6445 | size_t locsymcount; | |
6446 | size_t extsymoff; | |
6cdc0ccc | 6447 | Elf_Internal_Sym *isymbuf; |
252b5132 | 6448 | Elf_Internal_Sym *isym; |
6cdc0ccc | 6449 | Elf_Internal_Sym *isymend; |
252b5132 RH |
6450 | long *pindex; |
6451 | asection **ppsection; | |
6452 | asection *o; | |
c7ac6ff8 | 6453 | struct elf_backend_data *bed; |
b34976b6 | 6454 | bfd_boolean emit_relocs; |
f8deed93 | 6455 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
6456 | |
6457 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
6458 | bed = get_elf_backend_data (output_bfd); |
6459 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
6460 | |
6461 | /* If this is a dynamic object, we don't want to do anything here: | |
6462 | we don't want the local symbols, and we don't want the section | |
6463 | contents. */ | |
6464 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 6465 | return TRUE; |
252b5132 | 6466 | |
9317eacc | 6467 | emit_relocs = (finfo->info->relocateable |
c44233aa AM |
6468 | || finfo->info->emitrelocations |
6469 | || bed->elf_backend_emit_relocs); | |
9317eacc | 6470 | |
252b5132 RH |
6471 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
6472 | if (elf_bad_symtab (input_bfd)) | |
6473 | { | |
6474 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
6475 | extsymoff = 0; | |
6476 | } | |
6477 | else | |
6478 | { | |
6479 | locsymcount = symtab_hdr->sh_info; | |
6480 | extsymoff = symtab_hdr->sh_info; | |
6481 | } | |
6482 | ||
6483 | /* Read the local symbols. */ | |
6cdc0ccc AM |
6484 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
6485 | if (isymbuf == NULL && locsymcount != 0) | |
6486 | { | |
6487 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6488 | finfo->internal_syms, | |
6489 | finfo->external_syms, | |
6490 | finfo->locsym_shndx); | |
6491 | if (isymbuf == NULL) | |
b34976b6 | 6492 | return FALSE; |
252b5132 RH |
6493 | } |
6494 | ||
6cdc0ccc AM |
6495 | /* Find local symbol sections and adjust values of symbols in |
6496 | SEC_MERGE sections. Write out those local symbols we know are | |
6497 | going into the output file. */ | |
6498 | isymend = isymbuf + locsymcount; | |
6499 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
6500 | isym < isymend; | |
6501 | isym++, pindex++, ppsection++) | |
252b5132 RH |
6502 | { |
6503 | asection *isec; | |
6504 | const char *name; | |
6505 | Elf_Internal_Sym osym; | |
6506 | ||
252b5132 RH |
6507 | *pindex = -1; |
6508 | ||
6509 | if (elf_bad_symtab (input_bfd)) | |
6510 | { | |
6511 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
6512 | { | |
6513 | *ppsection = NULL; | |
6514 | continue; | |
6515 | } | |
6516 | } | |
6517 | ||
6518 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 6519 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
6520 | else if (isym->st_shndx < SHN_LORESERVE |
6521 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
6522 | { |
6523 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 | 6524 | if (isec |
68bfbfcc | 6525 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
6526 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
6527 | isym->st_value = | |
6528 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 6529 | elf_section_data (isec)->sec_info, |
f5fa8ca2 JJ |
6530 | isym->st_value, (bfd_vma) 0); |
6531 | } | |
252b5132 | 6532 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 6533 | isec = bfd_abs_section_ptr; |
252b5132 | 6534 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 6535 | isec = bfd_com_section_ptr; |
252b5132 RH |
6536 | else |
6537 | { | |
6538 | /* Who knows? */ | |
6539 | isec = NULL; | |
6540 | } | |
6541 | ||
6542 | *ppsection = isec; | |
6543 | ||
6544 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 6545 | if (ppsection == finfo->sections) |
252b5132 RH |
6546 | continue; |
6547 | ||
24376d1b AM |
6548 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
6549 | { | |
24376d1b AM |
6550 | /* We never output section symbols. Instead, we use the |
6551 | section symbol of the corresponding section in the output | |
6552 | file. */ | |
6553 | continue; | |
6554 | } | |
6555 | ||
252b5132 RH |
6556 | /* If we are stripping all symbols, we don't want to output this |
6557 | one. */ | |
6558 | if (finfo->info->strip == strip_all) | |
6559 | continue; | |
6560 | ||
252b5132 RH |
6561 | /* If we are discarding all local symbols, we don't want to |
6562 | output this one. If we are generating a relocateable output | |
6563 | file, then some of the local symbols may be required by | |
6564 | relocs; we output them below as we discover that they are | |
6565 | needed. */ | |
6566 | if (finfo->info->discard == discard_all) | |
6567 | continue; | |
6568 | ||
6569 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
6570 | discarding, we don't need to keep it, but note that |
6571 | linker_mark is only reliable for sections that have contents. | |
6572 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
6573 | as well as linker_mark. */ | |
9ad5cbcf | 6574 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
6575 | && isec != NULL |
6576 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
6577 | || (! finfo->info->relocateable | |
6578 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
6579 | continue; | |
6580 | ||
6581 | /* Get the name of the symbol. */ | |
6582 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6583 | isym->st_name); | |
6584 | if (name == NULL) | |
b34976b6 | 6585 | return FALSE; |
252b5132 RH |
6586 | |
6587 | /* See if we are discarding symbols with this name. */ | |
6588 | if ((finfo->info->strip == strip_some | |
b34976b6 | 6589 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 6590 | == NULL)) |
f5fa8ca2 JJ |
6591 | || (((finfo->info->discard == discard_sec_merge |
6592 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocateable) | |
6593 | || finfo->info->discard == discard_l) | |
252b5132 RH |
6594 | && bfd_is_local_label_name (input_bfd, name))) |
6595 | continue; | |
6596 | ||
6597 | /* If we get here, we are going to output this symbol. */ | |
6598 | ||
6599 | osym = *isym; | |
6600 | ||
6601 | /* Adjust the section index for the output file. */ | |
6602 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
6603 | isec->output_section); | |
9ad5cbcf | 6604 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 6605 | return FALSE; |
252b5132 RH |
6606 | |
6607 | *pindex = bfd_get_symcount (output_bfd); | |
6608 | ||
6609 | /* ELF symbols in relocateable files are section relative, but | |
6610 | in executable files they are virtual addresses. Note that | |
6611 | this code assumes that all ELF sections have an associated | |
6612 | BFD section with a reasonable value for output_offset; below | |
6613 | we assume that they also have a reasonable value for | |
6614 | output_section. Any special sections must be set up to meet | |
6615 | these requirements. */ | |
6616 | osym.st_value += isec->output_offset; | |
6617 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6618 | { |
6619 | osym.st_value += isec->output_section->vma; | |
6620 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
6621 | { | |
6622 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
6623 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6624 | osym.st_value -= finfo->first_tls_sec->vma; | |
6625 | } | |
6626 | } | |
252b5132 RH |
6627 | |
6628 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
b34976b6 | 6629 | return FALSE; |
252b5132 RH |
6630 | } |
6631 | ||
6632 | /* Relocate the contents of each section. */ | |
f8deed93 | 6633 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
6634 | for (o = input_bfd->sections; o != NULL; o = o->next) |
6635 | { | |
6636 | bfd_byte *contents; | |
6637 | ||
6638 | if (! o->linker_mark) | |
6639 | { | |
6640 | /* This section was omitted from the link. */ | |
6641 | continue; | |
6642 | } | |
6643 | ||
6644 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
6645 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
6646 | continue; | |
6647 | ||
6648 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
6649 | { | |
6650 | /* Section was created by elf_link_create_dynamic_sections | |
6651 | or somesuch. */ | |
6652 | continue; | |
6653 | } | |
6654 | ||
6655 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
6656 | relaxation routine. Note that o is a section in an input |
6657 | file, so the contents field will not have been set by any of | |
6658 | the routines which work on output files. */ | |
252b5132 RH |
6659 | if (elf_section_data (o)->this_hdr.contents != NULL) |
6660 | contents = elf_section_data (o)->this_hdr.contents; | |
6661 | else | |
6662 | { | |
6663 | contents = finfo->contents; | |
6664 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
6665 | (file_ptr) 0, o->_raw_size)) | |
b34976b6 | 6666 | return FALSE; |
252b5132 RH |
6667 | } |
6668 | ||
6669 | if ((o->flags & SEC_RELOC) != 0) | |
6670 | { | |
6671 | Elf_Internal_Rela *internal_relocs; | |
6672 | ||
6673 | /* Get the swapped relocs. */ | |
6674 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
6675 | (input_bfd, o, finfo->external_relocs, | |
b34976b6 | 6676 | finfo->internal_relocs, FALSE)); |
252b5132 RH |
6677 | if (internal_relocs == NULL |
6678 | && o->reloc_count > 0) | |
b34976b6 | 6679 | return FALSE; |
252b5132 | 6680 | |
ec338859 AM |
6681 | /* Run through the relocs looking for any against symbols |
6682 | from discarded sections and section symbols from | |
6683 | removed link-once sections. Complain about relocs | |
6684 | against discarded sections. Zero relocs against removed | |
126495ed | 6685 | link-once sections. */ |
73d074b4 DJ |
6686 | if (!finfo->info->relocateable |
6687 | && !elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
6688 | { |
6689 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 6690 | |
ec338859 AM |
6691 | rel = internal_relocs; |
6692 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
6693 | for ( ; rel < relend; rel++) | |
6694 | { | |
6695 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
6696 | ||
6697 | if (r_symndx >= locsymcount | |
6698 | || (elf_bad_symtab (input_bfd) | |
6699 | && finfo->sections[r_symndx] == NULL)) | |
6700 | { | |
6701 | struct elf_link_hash_entry *h; | |
6702 | ||
6703 | h = sym_hashes[r_symndx - extsymoff]; | |
6704 | while (h->root.type == bfd_link_hash_indirect | |
6705 | || h->root.type == bfd_link_hash_warning) | |
6706 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6707 | ||
6708 | /* Complain if the definition comes from a | |
6709 | discarded section. */ | |
6710 | if ((h->root.type == bfd_link_hash_defined | |
6711 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 6712 | && elf_discarded_section (h->root.u.def.section)) |
ec338859 | 6713 | { |
ec338859 AM |
6714 | if ((o->flags & SEC_DEBUGGING) != 0) |
6715 | { | |
45e9217a | 6716 | BFD_ASSERT (r_symndx != 0); |
f8deed93 | 6717 | memset (rel, 0, sizeof (*rel)); |
ec338859 AM |
6718 | } |
6719 | else | |
ec338859 AM |
6720 | { |
6721 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6722 | (finfo->info, h->root.root.string, | |
6723 | input_bfd, o, rel->r_offset, | |
b34976b6 AM |
6724 | TRUE))) |
6725 | return FALSE; | |
ec338859 AM |
6726 | } |
6727 | } | |
6728 | } | |
6729 | else | |
6730 | { | |
f9f32305 | 6731 | asection *sec = finfo->sections[r_symndx]; |
50b4d486 | 6732 | |
ed4de5e2 | 6733 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 6734 | { |
ad43ed4c L |
6735 | if ((o->flags & SEC_DEBUGGING) != 0 |
6736 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 6737 | { |
45e9217a | 6738 | BFD_ASSERT (r_symndx != 0); |
f9f32305 AM |
6739 | rel->r_info |
6740 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
6741 | rel->r_addend = 0; | |
6742 | } | |
6743 | else | |
f9f32305 | 6744 | { |
b34976b6 | 6745 | bfd_boolean ok; |
f9f32305 AM |
6746 | const char *msg |
6747 | = _("local symbols in discarded section %s"); | |
6748 | bfd_size_type amt | |
6749 | = strlen (sec->name) + strlen (msg) - 1; | |
6750 | char *buf = (char *) bfd_malloc (amt); | |
6751 | ||
6752 | if (buf != NULL) | |
6753 | sprintf (buf, msg, sec->name); | |
6754 | else | |
6755 | buf = (char *) sec->name; | |
6756 | ok = (*finfo->info->callbacks | |
6757 | ->undefined_symbol) (finfo->info, buf, | |
6758 | input_bfd, o, | |
6759 | rel->r_offset, | |
b34976b6 | 6760 | TRUE); |
f9f32305 AM |
6761 | if (buf != sec->name) |
6762 | free (buf); | |
6763 | if (!ok) | |
b34976b6 | 6764 | return FALSE; |
ec338859 AM |
6765 | } |
6766 | } | |
6767 | } | |
6768 | } | |
6769 | } | |
50b4d486 | 6770 | |
252b5132 RH |
6771 | /* Relocate the section by invoking a back end routine. |
6772 | ||
6773 | The back end routine is responsible for adjusting the | |
6774 | section contents as necessary, and (if using Rela relocs | |
6775 | and generating a relocateable output file) adjusting the | |
6776 | reloc addend as necessary. | |
6777 | ||
6778 | The back end routine does not have to worry about setting | |
6779 | the reloc address or the reloc symbol index. | |
6780 | ||
6781 | The back end routine is given a pointer to the swapped in | |
6782 | internal symbols, and can access the hash table entries | |
6783 | for the external symbols via elf_sym_hashes (input_bfd). | |
6784 | ||
6785 | When generating relocateable output, the back end routine | |
6786 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6787 | output symbol is going to be a section symbol | |
6788 | corresponding to the output section, which will require | |
6789 | the addend to be adjusted. */ | |
6790 | ||
6791 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6792 | input_bfd, o, contents, | |
6793 | internal_relocs, | |
6cdc0ccc | 6794 | isymbuf, |
252b5132 | 6795 | finfo->sections)) |
b34976b6 | 6796 | return FALSE; |
252b5132 | 6797 | |
9317eacc | 6798 | if (emit_relocs) |
252b5132 RH |
6799 | { |
6800 | Elf_Internal_Rela *irela; | |
6801 | Elf_Internal_Rela *irelaend; | |
73722af0 | 6802 | bfd_vma last_offset; |
252b5132 | 6803 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 6804 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 6805 | unsigned int next_erel; |
b34976b6 AM |
6806 | bfd_boolean (*reloc_emitter) |
6807 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, | |
6808 | Elf_Internal_Rela *)); | |
6809 | bfd_boolean rela_normal; | |
b491616a AM |
6810 | |
6811 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6812 | rela_normal = (bed->rela_normal | |
6813 | && (input_rel_hdr->sh_entsize | |
6814 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
6815 | |
6816 | /* Adjust the reloc addresses and symbol indices. */ | |
6817 | ||
6818 | irela = internal_relocs; | |
dc810e39 | 6819 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 6820 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
6821 | + elf_section_data (o->output_section)->rel_count |
6822 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 AM |
6823 | last_offset = o->output_offset; |
6824 | if (!finfo->info->relocateable) | |
6825 | last_offset += o->output_section->vma; | |
209f668e | 6826 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
6827 | { |
6828 | unsigned long r_symndx; | |
252b5132 | 6829 | asection *sec; |
fad2542d | 6830 | Elf_Internal_Sym sym; |
252b5132 | 6831 | |
209f668e NC |
6832 | if (next_erel == bed->s->int_rels_per_ext_rel) |
6833 | { | |
6834 | rel_hash++; | |
6835 | next_erel = 0; | |
6836 | } | |
6837 | ||
d6fe2dc1 AM |
6838 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
6839 | finfo->info, o, | |
6840 | irela->r_offset); | |
6841 | if (irela->r_offset >= (bfd_vma) -2) | |
6842 | { | |
73722af0 AM |
6843 | /* This is a reloc for a deleted entry or somesuch. |
6844 | Turn it into an R_*_NONE reloc, at the same | |
6845 | offset as the last reloc. elf_eh_frame.c and | |
6846 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 6847 | being ordered. */ |
73722af0 AM |
6848 | irela->r_offset = last_offset; |
6849 | irela->r_info = 0; | |
6850 | irela->r_addend = 0; | |
d6fe2dc1 AM |
6851 | continue; |
6852 | } | |
6853 | ||
252b5132 RH |
6854 | irela->r_offset += o->output_offset; |
6855 | ||
7ad34365 | 6856 | /* Relocs in an executable have to be virtual addresses. */ |
fd984e46 | 6857 | if (!finfo->info->relocateable) |
7ad34365 NC |
6858 | irela->r_offset += o->output_section->vma; |
6859 | ||
73722af0 | 6860 | last_offset = irela->r_offset; |
252b5132 | 6861 | |
73722af0 AM |
6862 | r_symndx = ELF_R_SYM (irela->r_info); |
6863 | if (r_symndx == STN_UNDEF) | |
252b5132 RH |
6864 | continue; |
6865 | ||
6866 | if (r_symndx >= locsymcount | |
6867 | || (elf_bad_symtab (input_bfd) | |
6868 | && finfo->sections[r_symndx] == NULL)) | |
6869 | { | |
6870 | struct elf_link_hash_entry *rh; | |
209f668e | 6871 | unsigned long indx; |
252b5132 RH |
6872 | |
6873 | /* This is a reloc against a global symbol. We | |
6874 | have not yet output all the local symbols, so | |
6875 | we do not know the symbol index of any global | |
6876 | symbol. We set the rel_hash entry for this | |
6877 | reloc to point to the global hash table entry | |
6878 | for this symbol. The symbol index is then | |
6879 | set at the end of elf_bfd_final_link. */ | |
6880 | indx = r_symndx - extsymoff; | |
6881 | rh = elf_sym_hashes (input_bfd)[indx]; | |
6882 | while (rh->root.type == bfd_link_hash_indirect | |
6883 | || rh->root.type == bfd_link_hash_warning) | |
6884 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
6885 | ||
6886 | /* Setting the index to -2 tells | |
6887 | elf_link_output_extsym that this symbol is | |
6888 | used by a reloc. */ | |
6889 | BFD_ASSERT (rh->indx < 0); | |
6890 | rh->indx = -2; | |
6891 | ||
6892 | *rel_hash = rh; | |
6893 | ||
6894 | continue; | |
6895 | } | |
6896 | ||
3e932841 | 6897 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
6898 | |
6899 | *rel_hash = NULL; | |
fad2542d | 6900 | sym = isymbuf[r_symndx]; |
252b5132 | 6901 | sec = finfo->sections[r_symndx]; |
fad2542d | 6902 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
6903 | { |
6904 | /* I suppose the backend ought to fill in the | |
6905 | section of any STT_SECTION symbol against a | |
6906 | processor specific section. If we have | |
6907 | discarded a section, the output_section will | |
6908 | be the absolute section. */ | |
b491616a AM |
6909 | if (bfd_is_abs_section (sec) |
6910 | || (sec != NULL | |
6911 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
6912 | r_symndx = 0; |
6913 | else if (sec == NULL || sec->owner == NULL) | |
6914 | { | |
6915 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 6916 | return FALSE; |
252b5132 RH |
6917 | } |
6918 | else | |
6919 | { | |
6920 | r_symndx = sec->output_section->target_index; | |
6921 | BFD_ASSERT (r_symndx != 0); | |
6922 | } | |
b491616a AM |
6923 | |
6924 | /* Adjust the addend according to where the | |
f5d44ba0 | 6925 | section winds up in the output section. */ |
b491616a AM |
6926 | if (rela_normal) |
6927 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
6928 | } |
6929 | else | |
6930 | { | |
6931 | if (finfo->indices[r_symndx] == -1) | |
6932 | { | |
dc810e39 | 6933 | unsigned long shlink; |
252b5132 RH |
6934 | const char *name; |
6935 | asection *osec; | |
6936 | ||
6937 | if (finfo->info->strip == strip_all) | |
6938 | { | |
6939 | /* You can't do ld -r -s. */ | |
6940 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 6941 | return FALSE; |
252b5132 RH |
6942 | } |
6943 | ||
6944 | /* This symbol was skipped earlier, but | |
6945 | since it is needed by a reloc, we | |
6946 | must output it now. */ | |
dc810e39 | 6947 | shlink = symtab_hdr->sh_link; |
a7b97311 | 6948 | name = (bfd_elf_string_from_elf_section |
fad2542d | 6949 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 6950 | if (name == NULL) |
b34976b6 | 6951 | return FALSE; |
252b5132 RH |
6952 | |
6953 | osec = sec->output_section; | |
fad2542d | 6954 | sym.st_shndx = |
252b5132 RH |
6955 | _bfd_elf_section_from_bfd_section (output_bfd, |
6956 | osec); | |
fad2542d | 6957 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 6958 | return FALSE; |
252b5132 | 6959 | |
fad2542d | 6960 | sym.st_value += sec->output_offset; |
252b5132 | 6961 | if (! finfo->info->relocateable) |
13ae64f3 | 6962 | { |
fad2542d AM |
6963 | sym.st_value += osec->vma; |
6964 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
6965 | { |
6966 | /* STT_TLS symbols are relative to PT_TLS | |
6967 | segment base. */ | |
6968 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
fad2542d | 6969 | sym.st_value -= finfo->first_tls_sec->vma; |
13ae64f3 JJ |
6970 | } |
6971 | } | |
252b5132 | 6972 | |
a7b97311 AM |
6973 | finfo->indices[r_symndx] |
6974 | = bfd_get_symcount (output_bfd); | |
252b5132 | 6975 | |
fad2542d | 6976 | if (! elf_link_output_sym (finfo, name, &sym, sec)) |
b34976b6 | 6977 | return FALSE; |
252b5132 RH |
6978 | } |
6979 | ||
6980 | r_symndx = finfo->indices[r_symndx]; | |
6981 | } | |
6982 | ||
6983 | irela->r_info = ELF_R_INFO (r_symndx, | |
6984 | ELF_R_TYPE (irela->r_info)); | |
6985 | } | |
6986 | ||
6987 | /* Swap out the relocs. */ | |
c44233aa AM |
6988 | if (bed->elf_backend_emit_relocs |
6989 | && !(finfo->info->relocateable | |
a7b97311 | 6990 | || finfo->info->emitrelocations)) |
c44233aa AM |
6991 | reloc_emitter = bed->elf_backend_emit_relocs; |
6992 | else | |
6993 | reloc_emitter = elf_link_output_relocs; | |
9317eacc | 6994 | |
c89583f8 AM |
6995 | if (input_rel_hdr->sh_size != 0 |
6996 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
6997 | internal_relocs)) | |
b34976b6 | 6998 | return FALSE; |
9317eacc | 6999 | |
c89583f8 AM |
7000 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
7001 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
7002 | { |
7003 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 7004 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 7005 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 7006 | internal_relocs)) |
b34976b6 | 7007 | return FALSE; |
c44233aa | 7008 | } |
252b5132 RH |
7009 | } |
7010 | } | |
7011 | ||
7012 | /* Write out the modified section contents. */ | |
73d074b4 | 7013 | if (bed->elf_backend_write_section |
f9f32305 | 7014 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
7015 | { |
7016 | /* Section written out. */ | |
7017 | } | |
68bfbfcc | 7018 | else switch (o->sec_info_type) |
f5fa8ca2 | 7019 | { |
65765700 | 7020 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 7021 | if (! (_bfd_write_section_stabs |
65765700 JJ |
7022 | (output_bfd, |
7023 | &elf_hash_table (finfo->info)->stab_info, | |
7024 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 7025 | return FALSE; |
65765700 JJ |
7026 | break; |
7027 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
7028 | if (! _bfd_write_merged_section (output_bfd, o, |
7029 | elf_section_data (o)->sec_info)) | |
b34976b6 | 7030 | return FALSE; |
65765700 JJ |
7031 | break; |
7032 | case ELF_INFO_TYPE_EH_FRAME: | |
7033 | { | |
126495ed AM |
7034 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
7035 | o, contents)) | |
b34976b6 | 7036 | return FALSE; |
65765700 JJ |
7037 | } |
7038 | break; | |
7039 | default: | |
7040 | { | |
7041 | bfd_size_type sec_size; | |
7042 | ||
7043 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
7044 | if (! (o->flags & SEC_EXCLUDE) | |
7045 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
7046 | contents, | |
7047 | (file_ptr) o->output_offset, | |
7048 | sec_size)) | |
b34976b6 | 7049 | return FALSE; |
65765700 JJ |
7050 | } |
7051 | break; | |
252b5132 RH |
7052 | } |
7053 | } | |
7054 | ||
b34976b6 | 7055 | return TRUE; |
252b5132 RH |
7056 | } |
7057 | ||
7058 | /* Generate a reloc when linking an ELF file. This is a reloc | |
7059 | requested by the linker, and does come from any input file. This | |
7060 | is used to build constructor and destructor tables when linking | |
7061 | with -Ur. */ | |
7062 | ||
b34976b6 | 7063 | static bfd_boolean |
252b5132 RH |
7064 | elf_reloc_link_order (output_bfd, info, output_section, link_order) |
7065 | bfd *output_bfd; | |
7066 | struct bfd_link_info *info; | |
7067 | asection *output_section; | |
7068 | struct bfd_link_order *link_order; | |
7069 | { | |
7070 | reloc_howto_type *howto; | |
7071 | long indx; | |
7072 | bfd_vma offset; | |
7073 | bfd_vma addend; | |
7074 | struct elf_link_hash_entry **rel_hash_ptr; | |
7075 | Elf_Internal_Shdr *rel_hdr; | |
32f0787a | 7076 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
7077 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
7078 | bfd_byte *erel; | |
7079 | unsigned int i; | |
252b5132 RH |
7080 | |
7081 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
7082 | if (howto == NULL) | |
7083 | { | |
7084 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 7085 | return FALSE; |
252b5132 RH |
7086 | } |
7087 | ||
7088 | addend = link_order->u.reloc.p->addend; | |
7089 | ||
7090 | /* Figure out the symbol index. */ | |
7091 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
7092 | + elf_section_data (output_section)->rel_count |
7093 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
7094 | if (link_order->type == bfd_section_reloc_link_order) |
7095 | { | |
7096 | indx = link_order->u.reloc.p->u.section->target_index; | |
7097 | BFD_ASSERT (indx != 0); | |
7098 | *rel_hash_ptr = NULL; | |
7099 | } | |
7100 | else | |
7101 | { | |
7102 | struct elf_link_hash_entry *h; | |
7103 | ||
7104 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 7105 | actually against the section. */ |
252b5132 RH |
7106 | h = ((struct elf_link_hash_entry *) |
7107 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
7108 | link_order->u.reloc.p->u.name, | |
b34976b6 | 7109 | FALSE, FALSE, TRUE)); |
252b5132 RH |
7110 | if (h != NULL |
7111 | && (h->root.type == bfd_link_hash_defined | |
7112 | || h->root.type == bfd_link_hash_defweak)) | |
7113 | { | |
7114 | asection *section; | |
7115 | ||
7116 | section = h->root.u.def.section; | |
7117 | indx = section->output_section->target_index; | |
7118 | *rel_hash_ptr = NULL; | |
7119 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
7120 | addend here, but in practice it has already been added |
7121 | because it was passed to constructor_callback. */ | |
252b5132 RH |
7122 | addend += section->output_section->vma + section->output_offset; |
7123 | } | |
7124 | else if (h != NULL) | |
7125 | { | |
7126 | /* Setting the index to -2 tells elf_link_output_extsym that | |
7127 | this symbol is used by a reloc. */ | |
7128 | h->indx = -2; | |
7129 | *rel_hash_ptr = h; | |
7130 | indx = 0; | |
7131 | } | |
7132 | else | |
7133 | { | |
7134 | if (! ((*info->callbacks->unattached_reloc) | |
7135 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
7136 | (asection *) NULL, (bfd_vma) 0))) | |
b34976b6 | 7137 | return FALSE; |
252b5132 RH |
7138 | indx = 0; |
7139 | } | |
7140 | } | |
7141 | ||
7142 | /* If this is an inplace reloc, we must write the addend into the | |
7143 | object file. */ | |
7144 | if (howto->partial_inplace && addend != 0) | |
7145 | { | |
7146 | bfd_size_type size; | |
7147 | bfd_reloc_status_type rstat; | |
7148 | bfd_byte *buf; | |
b34976b6 | 7149 | bfd_boolean ok; |
dc810e39 | 7150 | const char *sym_name; |
252b5132 RH |
7151 | |
7152 | size = bfd_get_reloc_size (howto); | |
7153 | buf = (bfd_byte *) bfd_zmalloc (size); | |
7154 | if (buf == (bfd_byte *) NULL) | |
b34976b6 | 7155 | return FALSE; |
dc810e39 | 7156 | rstat = _bfd_relocate_contents (howto, output_bfd, (bfd_vma) addend, buf); |
252b5132 RH |
7157 | switch (rstat) |
7158 | { | |
7159 | case bfd_reloc_ok: | |
7160 | break; | |
dc810e39 | 7161 | |
252b5132 RH |
7162 | default: |
7163 | case bfd_reloc_outofrange: | |
7164 | abort (); | |
dc810e39 | 7165 | |
252b5132 | 7166 | case bfd_reloc_overflow: |
dc810e39 AM |
7167 | if (link_order->type == bfd_section_reloc_link_order) |
7168 | sym_name = bfd_section_name (output_bfd, | |
7169 | link_order->u.reloc.p->u.section); | |
7170 | else | |
7171 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 7172 | if (! ((*info->callbacks->reloc_overflow) |
dc810e39 AM |
7173 | (info, sym_name, howto->name, addend, |
7174 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
252b5132 RH |
7175 | { |
7176 | free (buf); | |
b34976b6 | 7177 | return FALSE; |
252b5132 RH |
7178 | } |
7179 | break; | |
7180 | } | |
7181 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
7182 | (file_ptr) link_order->offset, size); | |
7183 | free (buf); | |
7184 | if (! ok) | |
b34976b6 | 7185 | return FALSE; |
252b5132 RH |
7186 | } |
7187 | ||
7188 | /* The address of a reloc is relative to the section in a | |
7189 | relocateable file, and is a virtual address in an executable | |
7190 | file. */ | |
7191 | offset = link_order->offset; | |
7192 | if (! info->relocateable) | |
7193 | offset += output_section->vma; | |
7194 | ||
947216bf AM |
7195 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
7196 | { | |
7197 | irel[i].r_offset = offset; | |
7198 | irel[i].r_info = 0; | |
7199 | irel[i].r_addend = 0; | |
7200 | } | |
7201 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 7202 | |
947216bf AM |
7203 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
7204 | erel = rel_hdr->contents; | |
252b5132 RH |
7205 | if (rel_hdr->sh_type == SHT_REL) |
7206 | { | |
947216bf AM |
7207 | erel += (elf_section_data (output_section)->rel_count |
7208 | * sizeof (Elf_External_Rel)); | |
7209 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); | |
252b5132 RH |
7210 | } |
7211 | else | |
7212 | { | |
947216bf AM |
7213 | irel[0].r_addend = addend; |
7214 | erel += (elf_section_data (output_section)->rel_count | |
7215 | * sizeof (Elf_External_Rela)); | |
7216 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); | |
252b5132 RH |
7217 | } |
7218 | ||
0525d26e | 7219 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 7220 | |
b34976b6 | 7221 | return TRUE; |
252b5132 | 7222 | } |
252b5132 RH |
7223 | \f |
7224 | /* Allocate a pointer to live in a linker created section. */ | |
7225 | ||
b34976b6 | 7226 | bfd_boolean |
252b5132 RH |
7227 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) |
7228 | bfd *abfd; | |
7229 | struct bfd_link_info *info; | |
7230 | elf_linker_section_t *lsect; | |
7231 | struct elf_link_hash_entry *h; | |
7232 | const Elf_Internal_Rela *rel; | |
7233 | { | |
7234 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
7235 | elf_linker_section_pointers_t *linker_section_ptr; | |
dc810e39 AM |
7236 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7237 | bfd_size_type amt; | |
252b5132 RH |
7238 | |
7239 | BFD_ASSERT (lsect != NULL); | |
7240 | ||
a7b97311 | 7241 | /* Is this a global symbol? */ |
252b5132 RH |
7242 | if (h != NULL) |
7243 | { | |
a7b97311 | 7244 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7245 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, |
7246 | rel->r_addend, | |
7247 | lsect->which)) | |
b34976b6 | 7248 | return TRUE; |
252b5132 RH |
7249 | |
7250 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
7251 | /* Make sure this symbol is output as a dynamic symbol. */ | |
7252 | if (h->dynindx == -1) | |
7253 | { | |
7254 | if (! elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 7255 | return FALSE; |
252b5132 RH |
7256 | } |
7257 | ||
7258 | if (lsect->rel_section) | |
7259 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7260 | } | |
a7b97311 | 7261 | else |
252b5132 | 7262 | { |
a7b97311 | 7263 | /* Allocation of a pointer to a local symbol. */ |
252b5132 RH |
7264 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
7265 | ||
a7b97311 | 7266 | /* Allocate a table to hold the local symbols if first time. */ |
252b5132 RH |
7267 | if (!ptr) |
7268 | { | |
7269 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
7270 | register unsigned int i; | |
7271 | ||
dc810e39 AM |
7272 | amt = num_symbols; |
7273 | amt *= sizeof (elf_linker_section_pointers_t *); | |
7274 | ptr = (elf_linker_section_pointers_t **) bfd_alloc (abfd, amt); | |
252b5132 RH |
7275 | |
7276 | if (!ptr) | |
b34976b6 | 7277 | return FALSE; |
252b5132 RH |
7278 | |
7279 | elf_local_ptr_offsets (abfd) = ptr; | |
7280 | for (i = 0; i < num_symbols; i++) | |
a7b97311 | 7281 | ptr[i] = (elf_linker_section_pointers_t *) 0; |
252b5132 RH |
7282 | } |
7283 | ||
a7b97311 | 7284 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7285 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], |
7286 | rel->r_addend, | |
7287 | lsect->which)) | |
b34976b6 | 7288 | return TRUE; |
252b5132 RH |
7289 | |
7290 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
7291 | ||
7292 | if (info->shared) | |
7293 | { | |
7294 | /* If we are generating a shared object, we need to | |
7295 | output a R_<xxx>_RELATIVE reloc so that the | |
7296 | dynamic linker can adjust this GOT entry. */ | |
7297 | BFD_ASSERT (lsect->rel_section != NULL); | |
7298 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7299 | } | |
7300 | } | |
7301 | ||
a7b97311 AM |
7302 | /* Allocate space for a pointer in the linker section, and allocate |
7303 | a new pointer record from internal memory. */ | |
252b5132 | 7304 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
dc810e39 AM |
7305 | amt = sizeof (elf_linker_section_pointers_t); |
7306 | linker_section_ptr = (elf_linker_section_pointers_t *) bfd_alloc (abfd, amt); | |
252b5132 RH |
7307 | |
7308 | if (!linker_section_ptr) | |
b34976b6 | 7309 | return FALSE; |
252b5132 RH |
7310 | |
7311 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
7312 | linker_section_ptr->addend = rel->r_addend; | |
7313 | linker_section_ptr->which = lsect->which; | |
b34976b6 | 7314 | linker_section_ptr->written_address_p = FALSE; |
252b5132 RH |
7315 | *ptr_linker_section_ptr = linker_section_ptr; |
7316 | ||
7317 | #if 0 | |
7318 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) | |
7319 | { | |
a7b97311 AM |
7320 | linker_section_ptr->offset = (lsect->section->_raw_size |
7321 | - lsect->hole_size + (ARCH_SIZE / 8)); | |
252b5132 RH |
7322 | lsect->hole_offset += ARCH_SIZE / 8; |
7323 | lsect->sym_offset += ARCH_SIZE / 8; | |
a7b97311 | 7324 | if (lsect->sym_hash) |
252b5132 | 7325 | { |
a7b97311 | 7326 | /* Bump up symbol value if needed. */ |
252b5132 RH |
7327 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; |
7328 | #ifdef DEBUG | |
7329 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
7330 | lsect->sym_hash->root.root.string, | |
a7b97311 AM |
7331 | (long) ARCH_SIZE / 8, |
7332 | (long) lsect->sym_hash->root.u.def.value); | |
252b5132 RH |
7333 | #endif |
7334 | } | |
7335 | } | |
7336 | else | |
7337 | #endif | |
7338 | linker_section_ptr->offset = lsect->section->_raw_size; | |
7339 | ||
7340 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
7341 | ||
7342 | #ifdef DEBUG | |
a7b97311 AM |
7343 | fprintf (stderr, |
7344 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
7345 | lsect->name, (long) linker_section_ptr->offset, | |
7346 | (long) lsect->section->_raw_size); | |
252b5132 RH |
7347 | #endif |
7348 | ||
b34976b6 | 7349 | return TRUE; |
252b5132 | 7350 | } |
252b5132 RH |
7351 | \f |
7352 | #if ARCH_SIZE==64 | |
7353 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
7354 | #endif | |
7355 | #if ARCH_SIZE==32 | |
7356 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
7357 | #endif | |
7358 | ||
209f668e | 7359 | /* Fill in the address for a pointer generated in a linker section. */ |
252b5132 RH |
7360 | |
7361 | bfd_vma | |
a7b97311 AM |
7362 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, |
7363 | relocation, rel, relative_reloc) | |
252b5132 RH |
7364 | bfd *output_bfd; |
7365 | bfd *input_bfd; | |
7366 | struct bfd_link_info *info; | |
7367 | elf_linker_section_t *lsect; | |
7368 | struct elf_link_hash_entry *h; | |
7369 | bfd_vma relocation; | |
7370 | const Elf_Internal_Rela *rel; | |
7371 | int relative_reloc; | |
7372 | { | |
7373 | elf_linker_section_pointers_t *linker_section_ptr; | |
7374 | ||
7375 | BFD_ASSERT (lsect != NULL); | |
7376 | ||
a7b97311 | 7377 | if (h != NULL) |
252b5132 | 7378 | { |
a7b97311 AM |
7379 | /* Handle global symbol. */ |
7380 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section | |
7381 | (h->linker_section_pointer, | |
7382 | rel->r_addend, | |
7383 | lsect->which)); | |
252b5132 RH |
7384 | |
7385 | BFD_ASSERT (linker_section_ptr != NULL); | |
7386 | ||
7387 | if (! elf_hash_table (info)->dynamic_sections_created | |
7388 | || (info->shared | |
7389 | && info->symbolic | |
7390 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
7391 | { | |
7392 | /* This is actually a static link, or it is a | |
7393 | -Bsymbolic link and the symbol is defined | |
7394 | locally. We must initialize this entry in the | |
7395 | global section. | |
7396 | ||
7397 | When doing a dynamic link, we create a .rela.<xxx> | |
7398 | relocation entry to initialize the value. This | |
7399 | is done in the finish_dynamic_symbol routine. */ | |
7400 | if (!linker_section_ptr->written_address_p) | |
7401 | { | |
b34976b6 | 7402 | linker_section_ptr->written_address_p = TRUE; |
a7b97311 AM |
7403 | bfd_put_ptr (output_bfd, |
7404 | relocation + linker_section_ptr->addend, | |
7405 | (lsect->section->contents | |
7406 | + linker_section_ptr->offset)); | |
252b5132 RH |
7407 | } |
7408 | } | |
7409 | } | |
a7b97311 | 7410 | else |
252b5132 | 7411 | { |
a7b97311 | 7412 | /* Handle local symbol. */ |
252b5132 RH |
7413 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7414 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
7415 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
a7b97311 AM |
7416 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section |
7417 | (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
7418 | rel->r_addend, | |
7419 | lsect->which)); | |
252b5132 RH |
7420 | |
7421 | BFD_ASSERT (linker_section_ptr != NULL); | |
7422 | ||
a7b97311 | 7423 | /* Write out pointer if it hasn't been rewritten out before. */ |
252b5132 RH |
7424 | if (!linker_section_ptr->written_address_p) |
7425 | { | |
b34976b6 | 7426 | linker_section_ptr->written_address_p = TRUE; |
252b5132 RH |
7427 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, |
7428 | lsect->section->contents + linker_section_ptr->offset); | |
7429 | ||
7430 | if (info->shared) | |
7431 | { | |
7432 | asection *srel = lsect->rel_section; | |
947216bf AM |
7433 | Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; |
7434 | bfd_byte *erel; | |
209f668e NC |
7435 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
7436 | unsigned int i; | |
252b5132 | 7437 | |
a7b97311 AM |
7438 | /* We need to generate a relative reloc for the dynamic |
7439 | linker. */ | |
252b5132 | 7440 | if (!srel) |
a7b97311 AM |
7441 | { |
7442 | srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
7443 | lsect->rel_name); | |
7444 | lsect->rel_section = srel; | |
7445 | } | |
252b5132 RH |
7446 | |
7447 | BFD_ASSERT (srel != NULL); | |
7448 | ||
209f668e | 7449 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
947216bf AM |
7450 | { |
7451 | outrel[i].r_offset = (lsect->section->output_section->vma | |
7452 | + lsect->section->output_offset | |
7453 | + linker_section_ptr->offset); | |
7454 | outrel[i].r_info = 0; | |
7455 | outrel[i].r_addend = 0; | |
7456 | } | |
209f668e | 7457 | outrel[0].r_info = ELF_R_INFO (0, relative_reloc); |
947216bf AM |
7458 | erel = lsect->section->contents; |
7459 | erel += (elf_section_data (lsect->section)->rel_count++ | |
7460 | * sizeof (Elf_External_Rela)); | |
dc810e39 | 7461 | elf_swap_reloca_out (output_bfd, outrel, erel); |
252b5132 RH |
7462 | } |
7463 | } | |
7464 | } | |
7465 | ||
7466 | relocation = (lsect->section->output_offset | |
7467 | + linker_section_ptr->offset | |
7468 | - lsect->hole_offset | |
7469 | - lsect->sym_offset); | |
7470 | ||
7471 | #ifdef DEBUG | |
a7b97311 AM |
7472 | fprintf (stderr, |
7473 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
7474 | lsect->name, (long) relocation, (long) relocation); | |
252b5132 RH |
7475 | #endif |
7476 | ||
7477 | /* Subtract out the addend, because it will get added back in by the normal | |
7478 | processing. */ | |
7479 | return relocation - linker_section_ptr->addend; | |
7480 | } | |
7481 | \f | |
7482 | /* Garbage collect unused sections. */ | |
7483 | ||
b34976b6 | 7484 | static bfd_boolean elf_gc_mark |
58821868 AM |
7485 | PARAMS ((struct bfd_link_info *, asection *, |
7486 | asection * (*) (asection *, struct bfd_link_info *, | |
7487 | Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
7488 | Elf_Internal_Sym *))); | |
252b5132 | 7489 | |
b34976b6 | 7490 | static bfd_boolean elf_gc_sweep |
58821868 | 7491 | PARAMS ((struct bfd_link_info *, |
b34976b6 AM |
7492 | bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *, |
7493 | const Elf_Internal_Rela *))); | |
252b5132 | 7494 | |
b34976b6 | 7495 | static bfd_boolean elf_gc_sweep_symbol |
58821868 | 7496 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7497 | |
b34976b6 | 7498 | static bfd_boolean elf_gc_allocate_got_offsets |
58821868 | 7499 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7500 | |
b34976b6 | 7501 | static bfd_boolean elf_gc_propagate_vtable_entries_used |
58821868 | 7502 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7503 | |
b34976b6 | 7504 | static bfd_boolean elf_gc_smash_unused_vtentry_relocs |
58821868 | 7505 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7506 | |
7507 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
7508 | it and any sections in this section's group, and all the sections |
7509 | which define symbols to which it refers. */ | |
252b5132 | 7510 | |
b34976b6 AM |
7511 | typedef asection * (*gc_mark_hook_fn) |
7512 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
7513 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
7514 | ||
7515 | static bfd_boolean | |
252b5132 RH |
7516 | elf_gc_mark (info, sec, gc_mark_hook) |
7517 | struct bfd_link_info *info; | |
7518 | asection *sec; | |
b34976b6 | 7519 | gc_mark_hook_fn gc_mark_hook; |
252b5132 | 7520 | { |
b34976b6 | 7521 | bfd_boolean ret; |
dbb410c3 | 7522 | asection *group_sec; |
252b5132 RH |
7523 | |
7524 | sec->gc_mark = 1; | |
7525 | ||
dbb410c3 AM |
7526 | /* Mark all the sections in the group. */ |
7527 | group_sec = elf_section_data (sec)->next_in_group; | |
7528 | if (group_sec && !group_sec->gc_mark) | |
7529 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 7530 | return FALSE; |
252b5132 | 7531 | |
dbb410c3 | 7532 | /* Look through the section relocs. */ |
b34976b6 | 7533 | ret = TRUE; |
252b5132 RH |
7534 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
7535 | { | |
7536 | Elf_Internal_Rela *relstart, *rel, *relend; | |
7537 | Elf_Internal_Shdr *symtab_hdr; | |
7538 | struct elf_link_hash_entry **sym_hashes; | |
7539 | size_t nlocsyms; | |
7540 | size_t extsymoff; | |
252b5132 | 7541 | bfd *input_bfd = sec->owner; |
c7ac6ff8 | 7542 | struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 7543 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
7544 | |
7545 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
7546 | sym_hashes = elf_sym_hashes (input_bfd); | |
7547 | ||
7548 | /* Read the local symbols. */ | |
7549 | if (elf_bad_symtab (input_bfd)) | |
7550 | { | |
7551 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 7552 | extsymoff = 0; |
252b5132 RH |
7553 | } |
7554 | else | |
7555 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 7556 | |
6cdc0ccc AM |
7557 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
7558 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 7559 | { |
6cdc0ccc AM |
7560 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
7561 | NULL, NULL, NULL); | |
7562 | if (isym == NULL) | |
b34976b6 | 7563 | return FALSE; |
9ad5cbcf AM |
7564 | } |
7565 | ||
252b5132 RH |
7566 | /* Read the relocations. */ |
7567 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
6cdc0ccc | 7568 | (input_bfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
252b5132 RH |
7569 | info->keep_memory)); |
7570 | if (relstart == NULL) | |
7571 | { | |
b34976b6 | 7572 | ret = FALSE; |
252b5132 RH |
7573 | goto out1; |
7574 | } | |
c7ac6ff8 | 7575 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7576 | |
7577 | for (rel = relstart; rel < relend; rel++) | |
7578 | { | |
7579 | unsigned long r_symndx; | |
7580 | asection *rsec; | |
7581 | struct elf_link_hash_entry *h; | |
252b5132 RH |
7582 | |
7583 | r_symndx = ELF_R_SYM (rel->r_info); | |
7584 | if (r_symndx == 0) | |
7585 | continue; | |
7586 | ||
6cdc0ccc AM |
7587 | if (r_symndx >= nlocsyms |
7588 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
7589 | { |
7590 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 7591 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
7592 | } |
7593 | else | |
7594 | { | |
6cdc0ccc | 7595 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
7596 | } |
7597 | ||
7598 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
7599 | { |
7600 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
7601 | rsec->gc_mark = 1; | |
7602 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
7603 | { | |
b34976b6 | 7604 | ret = FALSE; |
b91afed7 AM |
7605 | goto out2; |
7606 | } | |
7607 | } | |
252b5132 RH |
7608 | } |
7609 | ||
7610 | out2: | |
6cdc0ccc | 7611 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
7612 | free (relstart); |
7613 | out1: | |
6cdc0ccc AM |
7614 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
7615 | { | |
7616 | if (! info->keep_memory) | |
7617 | free (isym); | |
7618 | else | |
7619 | symtab_hdr->contents = (unsigned char *) isym; | |
7620 | } | |
252b5132 RH |
7621 | } |
7622 | ||
7623 | return ret; | |
7624 | } | |
7625 | ||
7626 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
7627 | ||
b34976b6 AM |
7628 | typedef bfd_boolean (*gc_sweep_hook_fn) |
7629 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
7630 | const Elf_Internal_Rela *)); | |
7631 | ||
7632 | static bfd_boolean | |
252b5132 RH |
7633 | elf_gc_sweep (info, gc_sweep_hook) |
7634 | struct bfd_link_info *info; | |
b34976b6 | 7635 | gc_sweep_hook_fn gc_sweep_hook; |
252b5132 RH |
7636 | { |
7637 | bfd *sub; | |
7638 | ||
7639 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7640 | { | |
7641 | asection *o; | |
7642 | ||
f6af82bd AM |
7643 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
7644 | continue; | |
7645 | ||
252b5132 RH |
7646 | for (o = sub->sections; o != NULL; o = o->next) |
7647 | { | |
7648 | /* Keep special sections. Keep .debug sections. */ | |
7649 | if ((o->flags & SEC_LINKER_CREATED) | |
7650 | || (o->flags & SEC_DEBUGGING)) | |
7651 | o->gc_mark = 1; | |
7652 | ||
7653 | if (o->gc_mark) | |
7654 | continue; | |
7655 | ||
7656 | /* Skip sweeping sections already excluded. */ | |
7657 | if (o->flags & SEC_EXCLUDE) | |
7658 | continue; | |
7659 | ||
7660 | /* Since this is early in the link process, it is simple | |
7661 | to remove a section from the output. */ | |
7662 | o->flags |= SEC_EXCLUDE; | |
7663 | ||
7664 | /* But we also have to update some of the relocation | |
7665 | info we collected before. */ | |
7666 | if (gc_sweep_hook | |
7667 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
7668 | { | |
7669 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 7670 | bfd_boolean r; |
252b5132 RH |
7671 | |
7672 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
7673 | (o->owner, o, NULL, NULL, info->keep_memory)); | |
7674 | if (internal_relocs == NULL) | |
b34976b6 | 7675 | return FALSE; |
252b5132 | 7676 | |
3e932841 | 7677 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 7678 | |
6cdc0ccc | 7679 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
7680 | free (internal_relocs); |
7681 | ||
7682 | if (!r) | |
b34976b6 | 7683 | return FALSE; |
252b5132 RH |
7684 | } |
7685 | } | |
7686 | } | |
7687 | ||
7688 | /* Remove the symbols that were in the swept sections from the dynamic | |
7689 | symbol table. GCFIXME: Anyone know how to get them out of the | |
7690 | static symbol table as well? */ | |
7691 | { | |
7692 | int i = 0; | |
7693 | ||
7694 | elf_link_hash_traverse (elf_hash_table (info), | |
7695 | elf_gc_sweep_symbol, | |
7696 | (PTR) &i); | |
7697 | ||
7698 | elf_hash_table (info)->dynsymcount = i; | |
7699 | } | |
7700 | ||
b34976b6 | 7701 | return TRUE; |
252b5132 RH |
7702 | } |
7703 | ||
7704 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
7705 | ||
b34976b6 | 7706 | static bfd_boolean |
252b5132 RH |
7707 | elf_gc_sweep_symbol (h, idxptr) |
7708 | struct elf_link_hash_entry *h; | |
7709 | PTR idxptr; | |
7710 | { | |
7711 | int *idx = (int *) idxptr; | |
7712 | ||
e92d460e AM |
7713 | if (h->root.type == bfd_link_hash_warning) |
7714 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7715 | ||
252b5132 RH |
7716 | if (h->dynindx != -1 |
7717 | && ((h->root.type != bfd_link_hash_defined | |
7718 | && h->root.type != bfd_link_hash_defweak) | |
7719 | || h->root.u.def.section->gc_mark)) | |
7720 | h->dynindx = (*idx)++; | |
7721 | ||
b34976b6 | 7722 | return TRUE; |
252b5132 RH |
7723 | } |
7724 | ||
7725 | /* Propogate collected vtable information. This is called through | |
7726 | elf_link_hash_traverse. */ | |
7727 | ||
b34976b6 | 7728 | static bfd_boolean |
252b5132 RH |
7729 | elf_gc_propagate_vtable_entries_used (h, okp) |
7730 | struct elf_link_hash_entry *h; | |
7731 | PTR okp; | |
7732 | { | |
e92d460e AM |
7733 | if (h->root.type == bfd_link_hash_warning) |
7734 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7735 | ||
3e932841 | 7736 | /* Those that are not vtables. */ |
252b5132 | 7737 | if (h->vtable_parent == NULL) |
b34976b6 | 7738 | return TRUE; |
252b5132 RH |
7739 | |
7740 | /* Those vtables that do not have parents, we cannot merge. */ | |
7741 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 7742 | return TRUE; |
252b5132 RH |
7743 | |
7744 | /* If we've already been done, exit. */ | |
7745 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 7746 | return TRUE; |
252b5132 RH |
7747 | |
7748 | /* Make sure the parent's table is up to date. */ | |
7749 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
7750 | ||
7751 | if (h->vtable_entries_used == NULL) | |
7752 | { | |
7753 | /* None of this table's entries were referenced. Re-use the | |
7754 | parent's table. */ | |
7755 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
7756 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
7757 | } | |
7758 | else | |
7759 | { | |
7760 | size_t n; | |
b34976b6 | 7761 | bfd_boolean *cu, *pu; |
252b5132 RH |
7762 | |
7763 | /* Or the parent's entries into ours. */ | |
7764 | cu = h->vtable_entries_used; | |
b34976b6 | 7765 | cu[-1] = TRUE; |
252b5132 RH |
7766 | pu = h->vtable_parent->vtable_entries_used; |
7767 | if (pu != NULL) | |
7768 | { | |
c44233aa AM |
7769 | asection *sec = h->root.u.def.section; |
7770 | struct elf_backend_data *bed = get_elf_backend_data (sec->owner); | |
7771 | int file_align = bed->s->file_align; | |
0d1ea5c0 CM |
7772 | |
7773 | n = h->vtable_parent->vtable_entries_size / file_align; | |
374b596d | 7774 | while (n--) |
252b5132 | 7775 | { |
374b596d | 7776 | if (*pu) |
b34976b6 | 7777 | *cu = TRUE; |
374b596d NC |
7778 | pu++; |
7779 | cu++; | |
252b5132 RH |
7780 | } |
7781 | } | |
7782 | } | |
7783 | ||
b34976b6 | 7784 | return TRUE; |
252b5132 RH |
7785 | } |
7786 | ||
b34976b6 | 7787 | static bfd_boolean |
252b5132 RH |
7788 | elf_gc_smash_unused_vtentry_relocs (h, okp) |
7789 | struct elf_link_hash_entry *h; | |
7790 | PTR okp; | |
7791 | { | |
7792 | asection *sec; | |
7793 | bfd_vma hstart, hend; | |
7794 | Elf_Internal_Rela *relstart, *relend, *rel; | |
c7ac6ff8 | 7795 | struct elf_backend_data *bed; |
0d1ea5c0 | 7796 | int file_align; |
252b5132 | 7797 | |
e92d460e AM |
7798 | if (h->root.type == bfd_link_hash_warning) |
7799 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7800 | ||
252b5132 RH |
7801 | /* Take care of both those symbols that do not describe vtables as |
7802 | well as those that are not loaded. */ | |
7803 | if (h->vtable_parent == NULL) | |
b34976b6 | 7804 | return TRUE; |
252b5132 RH |
7805 | |
7806 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
7807 | || h->root.type == bfd_link_hash_defweak); | |
7808 | ||
7809 | sec = h->root.u.def.section; | |
7810 | hstart = h->root.u.def.value; | |
7811 | hend = hstart + h->size; | |
7812 | ||
7813 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
b34976b6 | 7814 | (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL, TRUE)); |
252b5132 | 7815 | if (!relstart) |
b34976b6 | 7816 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 7817 | bed = get_elf_backend_data (sec->owner); |
0d1ea5c0 CM |
7818 | file_align = bed->s->file_align; |
7819 | ||
c7ac6ff8 | 7820 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7821 | |
7822 | for (rel = relstart; rel < relend; ++rel) | |
7823 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
7824 | { | |
7825 | /* If the entry is in use, do nothing. */ | |
7826 | if (h->vtable_entries_used | |
7827 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
7828 | { | |
0d1ea5c0 | 7829 | bfd_vma entry = (rel->r_offset - hstart) / file_align; |
252b5132 RH |
7830 | if (h->vtable_entries_used[entry]) |
7831 | continue; | |
7832 | } | |
7833 | /* Otherwise, kill it. */ | |
7834 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
7835 | } | |
7836 | ||
b34976b6 | 7837 | return TRUE; |
252b5132 RH |
7838 | } |
7839 | ||
7840 | /* Do mark and sweep of unused sections. */ | |
7841 | ||
b34976b6 | 7842 | bfd_boolean |
252b5132 RH |
7843 | elf_gc_sections (abfd, info) |
7844 | bfd *abfd; | |
7845 | struct bfd_link_info *info; | |
7846 | { | |
b34976b6 | 7847 | bfd_boolean ok = TRUE; |
252b5132 RH |
7848 | bfd *sub; |
7849 | asection * (*gc_mark_hook) | |
1e2f5b6e | 7850 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
c44233aa | 7851 | struct elf_link_hash_entry *h, Elf_Internal_Sym *)); |
252b5132 RH |
7852 | |
7853 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
6d3e950b | 7854 | || info->relocateable || info->emitrelocations |
252b5132 | 7855 | || elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 7856 | return TRUE; |
252b5132 RH |
7857 | |
7858 | /* Apply transitive closure to the vtable entry usage info. */ | |
7859 | elf_link_hash_traverse (elf_hash_table (info), | |
7860 | elf_gc_propagate_vtable_entries_used, | |
7861 | (PTR) &ok); | |
7862 | if (!ok) | |
b34976b6 | 7863 | return FALSE; |
252b5132 RH |
7864 | |
7865 | /* Kill the vtable relocations that were not used. */ | |
7866 | elf_link_hash_traverse (elf_hash_table (info), | |
7867 | elf_gc_smash_unused_vtentry_relocs, | |
7868 | (PTR) &ok); | |
7869 | if (!ok) | |
b34976b6 | 7870 | return FALSE; |
252b5132 RH |
7871 | |
7872 | /* Grovel through relocs to find out who stays ... */ | |
7873 | ||
7874 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
7875 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7876 | { | |
7877 | asection *o; | |
f6af82bd AM |
7878 | |
7879 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
7880 | continue; | |
7881 | ||
252b5132 RH |
7882 | for (o = sub->sections; o != NULL; o = o->next) |
7883 | { | |
7884 | if (o->flags & SEC_KEEP) | |
c44233aa | 7885 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 7886 | return FALSE; |
252b5132 RH |
7887 | } |
7888 | } | |
7889 | ||
7890 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 7891 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 7892 | return FALSE; |
252b5132 | 7893 | |
b34976b6 | 7894 | return TRUE; |
252b5132 RH |
7895 | } |
7896 | \f | |
7897 | /* Called from check_relocs to record the existance of a VTINHERIT reloc. */ | |
7898 | ||
b34976b6 | 7899 | bfd_boolean |
252b5132 RH |
7900 | elf_gc_record_vtinherit (abfd, sec, h, offset) |
7901 | bfd *abfd; | |
7902 | asection *sec; | |
7903 | struct elf_link_hash_entry *h; | |
7904 | bfd_vma offset; | |
7905 | { | |
7906 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
7907 | struct elf_link_hash_entry **search, *child; | |
7908 | bfd_size_type extsymcount; | |
7909 | ||
7910 | /* The sh_info field of the symtab header tells us where the | |
7911 | external symbols start. We don't care about the local symbols at | |
7912 | this point. */ | |
7913 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
7914 | if (!elf_bad_symtab (abfd)) | |
7915 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
7916 | ||
7917 | sym_hashes = elf_sym_hashes (abfd); | |
7918 | sym_hashes_end = sym_hashes + extsymcount; | |
7919 | ||
7920 | /* Hunt down the child symbol, which is in this section at the same | |
7921 | offset as the relocation. */ | |
7922 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
7923 | { | |
7924 | if ((child = *search) != NULL | |
7925 | && (child->root.type == bfd_link_hash_defined | |
7926 | || child->root.type == bfd_link_hash_defweak) | |
7927 | && child->root.u.def.section == sec | |
7928 | && child->root.u.def.value == offset) | |
7929 | goto win; | |
7930 | } | |
7931 | ||
7932 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 7933 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 7934 | (unsigned long) offset); |
252b5132 | 7935 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 7936 | return FALSE; |
252b5132 | 7937 | |
dc810e39 | 7938 | win: |
252b5132 RH |
7939 | if (!h) |
7940 | { | |
7941 | /* This *should* only be the absolute section. It could potentially | |
7942 | be that someone has defined a non-global vtable though, which | |
7943 | would be bad. It isn't worth paging in the local symbols to be | |
7944 | sure though; that case should simply be handled by the assembler. */ | |
7945 | ||
7946 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
7947 | } | |
7948 | else | |
7949 | child->vtable_parent = h; | |
7950 | ||
b34976b6 | 7951 | return TRUE; |
252b5132 RH |
7952 | } |
7953 | ||
7954 | /* Called from check_relocs to record the existance of a VTENTRY reloc. */ | |
7955 | ||
b34976b6 | 7956 | bfd_boolean |
252b5132 | 7957 | elf_gc_record_vtentry (abfd, sec, h, addend) |
7442e600 ILT |
7958 | bfd *abfd ATTRIBUTE_UNUSED; |
7959 | asection *sec ATTRIBUTE_UNUSED; | |
252b5132 RH |
7960 | struct elf_link_hash_entry *h; |
7961 | bfd_vma addend; | |
7962 | { | |
0d1ea5c0 CM |
7963 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
7964 | int file_align = bed->s->file_align; | |
7965 | ||
252b5132 RH |
7966 | if (addend >= h->vtable_entries_size) |
7967 | { | |
7968 | size_t size, bytes; | |
b34976b6 | 7969 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
7970 | |
7971 | /* While the symbol is undefined, we have to be prepared to handle | |
7972 | a zero size. */ | |
7973 | if (h->root.type == bfd_link_hash_undefined) | |
7974 | size = addend; | |
7975 | else | |
7976 | { | |
7977 | size = h->size; | |
7978 | if (size < addend) | |
7979 | { | |
7980 | /* Oops! We've got a reference past the defined end of | |
7981 | the table. This is probably a bug -- shall we warn? */ | |
7982 | size = addend; | |
7983 | } | |
7984 | } | |
7985 | ||
7986 | /* Allocate one extra entry for use as a "done" flag for the | |
7987 | consolidation pass. */ | |
b34976b6 | 7988 | bytes = (size / file_align + 1) * sizeof (bfd_boolean); |
252b5132 RH |
7989 | |
7990 | if (ptr) | |
7991 | { | |
dc810e39 | 7992 | ptr = bfd_realloc (ptr - 1, (bfd_size_type) bytes); |
3e932841 | 7993 | |
fed79cc6 NC |
7994 | if (ptr != NULL) |
7995 | { | |
7996 | size_t oldbytes; | |
252b5132 | 7997 | |
a7b97311 | 7998 | oldbytes = ((h->vtable_entries_size / file_align + 1) |
b34976b6 | 7999 | * sizeof (bfd_boolean)); |
a7b97311 | 8000 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 8001 | } |
252b5132 RH |
8002 | } |
8003 | else | |
dc810e39 | 8004 | ptr = bfd_zmalloc ((bfd_size_type) bytes); |
252b5132 | 8005 | |
fed79cc6 | 8006 | if (ptr == NULL) |
b34976b6 | 8007 | return FALSE; |
3e932841 | 8008 | |
252b5132 | 8009 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 8010 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
8011 | h->vtable_entries_size = size; |
8012 | } | |
3e932841 | 8013 | |
b34976b6 | 8014 | h->vtable_entries_used[addend / file_align] = TRUE; |
252b5132 | 8015 | |
b34976b6 | 8016 | return TRUE; |
252b5132 RH |
8017 | } |
8018 | ||
8019 | /* And an accompanying bit to work out final got entry offsets once | |
8020 | we're done. Should be called from final_link. */ | |
8021 | ||
b34976b6 | 8022 | bfd_boolean |
252b5132 RH |
8023 | elf_gc_common_finalize_got_offsets (abfd, info) |
8024 | bfd *abfd; | |
8025 | struct bfd_link_info *info; | |
8026 | { | |
8027 | bfd *i; | |
8028 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8029 | bfd_vma gotoff; | |
8030 | ||
8031 | /* The GOT offset is relative to the .got section, but the GOT header is | |
8032 | put into the .got.plt section, if the backend uses it. */ | |
8033 | if (bed->want_got_plt) | |
8034 | gotoff = 0; | |
8035 | else | |
8036 | gotoff = bed->got_header_size; | |
8037 | ||
8038 | /* Do the local .got entries first. */ | |
8039 | for (i = info->input_bfds; i; i = i->link_next) | |
8040 | { | |
f6af82bd | 8041 | bfd_signed_vma *local_got; |
252b5132 RH |
8042 | bfd_size_type j, locsymcount; |
8043 | Elf_Internal_Shdr *symtab_hdr; | |
8044 | ||
f6af82bd AM |
8045 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
8046 | continue; | |
8047 | ||
8048 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
8049 | if (!local_got) |
8050 | continue; | |
8051 | ||
8052 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
8053 | if (elf_bad_symtab (i)) | |
8054 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
8055 | else | |
8056 | locsymcount = symtab_hdr->sh_info; | |
8057 | ||
8058 | for (j = 0; j < locsymcount; ++j) | |
8059 | { | |
8060 | if (local_got[j] > 0) | |
8061 | { | |
8062 | local_got[j] = gotoff; | |
8063 | gotoff += ARCH_SIZE / 8; | |
8064 | } | |
8065 | else | |
8066 | local_got[j] = (bfd_vma) -1; | |
8067 | } | |
8068 | } | |
8069 | ||
dd5724d5 AM |
8070 | /* Then the global .got entries. .plt refcounts are handled by |
8071 | adjust_dynamic_symbol */ | |
252b5132 RH |
8072 | elf_link_hash_traverse (elf_hash_table (info), |
8073 | elf_gc_allocate_got_offsets, | |
8074 | (PTR) &gotoff); | |
b34976b6 | 8075 | return TRUE; |
252b5132 RH |
8076 | } |
8077 | ||
8078 | /* We need a special top-level link routine to convert got reference counts | |
8079 | to real got offsets. */ | |
8080 | ||
b34976b6 | 8081 | static bfd_boolean |
252b5132 RH |
8082 | elf_gc_allocate_got_offsets (h, offarg) |
8083 | struct elf_link_hash_entry *h; | |
8084 | PTR offarg; | |
8085 | { | |
8086 | bfd_vma *off = (bfd_vma *) offarg; | |
8087 | ||
e92d460e AM |
8088 | if (h->root.type == bfd_link_hash_warning) |
8089 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8090 | ||
252b5132 RH |
8091 | if (h->got.refcount > 0) |
8092 | { | |
8093 | h->got.offset = off[0]; | |
8094 | off[0] += ARCH_SIZE / 8; | |
8095 | } | |
8096 | else | |
8097 | h->got.offset = (bfd_vma) -1; | |
8098 | ||
b34976b6 | 8099 | return TRUE; |
252b5132 RH |
8100 | } |
8101 | ||
8102 | /* Many folk need no more in the way of final link than this, once | |
8103 | got entry reference counting is enabled. */ | |
8104 | ||
b34976b6 | 8105 | bfd_boolean |
252b5132 RH |
8106 | elf_gc_common_final_link (abfd, info) |
8107 | bfd *abfd; | |
8108 | struct bfd_link_info *info; | |
8109 | { | |
8110 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 8111 | return FALSE; |
252b5132 RH |
8112 | |
8113 | /* Invoke the regular ELF backend linker to do all the work. */ | |
8114 | return elf_bfd_final_link (abfd, info); | |
8115 | } | |
8116 | ||
8117 | /* This function will be called though elf_link_hash_traverse to store | |
8118 | all hash value of the exported symbols in an array. */ | |
8119 | ||
b34976b6 | 8120 | static bfd_boolean |
252b5132 RH |
8121 | elf_collect_hash_codes (h, data) |
8122 | struct elf_link_hash_entry *h; | |
8123 | PTR data; | |
8124 | { | |
8125 | unsigned long **valuep = (unsigned long **) data; | |
8126 | const char *name; | |
8127 | char *p; | |
8128 | unsigned long ha; | |
8129 | char *alc = NULL; | |
8130 | ||
e92d460e AM |
8131 | if (h->root.type == bfd_link_hash_warning) |
8132 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8133 | ||
252b5132 RH |
8134 | /* Ignore indirect symbols. These are added by the versioning code. */ |
8135 | if (h->dynindx == -1) | |
b34976b6 | 8136 | return TRUE; |
252b5132 RH |
8137 | |
8138 | name = h->root.root.string; | |
8139 | p = strchr (name, ELF_VER_CHR); | |
8140 | if (p != NULL) | |
8141 | { | |
dc810e39 AM |
8142 | alc = bfd_malloc ((bfd_size_type) (p - name + 1)); |
8143 | memcpy (alc, name, (size_t) (p - name)); | |
252b5132 RH |
8144 | alc[p - name] = '\0'; |
8145 | name = alc; | |
8146 | } | |
8147 | ||
8148 | /* Compute the hash value. */ | |
8149 | ha = bfd_elf_hash (name); | |
8150 | ||
8151 | /* Store the found hash value in the array given as the argument. */ | |
8152 | *(*valuep)++ = ha; | |
8153 | ||
8154 | /* And store it in the struct so that we can put it in the hash table | |
8155 | later. */ | |
8156 | h->elf_hash_value = ha; | |
8157 | ||
8158 | if (alc != NULL) | |
8159 | free (alc); | |
8160 | ||
b34976b6 | 8161 | return TRUE; |
252b5132 | 8162 | } |
73d074b4 | 8163 | |
b34976b6 | 8164 | bfd_boolean |
73d074b4 DJ |
8165 | elf_reloc_symbol_deleted_p (offset, cookie) |
8166 | bfd_vma offset; | |
8167 | PTR cookie; | |
8168 | { | |
9ad5cbcf | 8169 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
73d074b4 DJ |
8170 | |
8171 | if (rcookie->bad_symtab) | |
8172 | rcookie->rel = rcookie->rels; | |
8173 | ||
8174 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
8175 | { | |
d6fe2dc1 | 8176 | unsigned long r_symndx; |
73d074b4 DJ |
8177 | |
8178 | if (! rcookie->bad_symtab) | |
8179 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 8180 | return FALSE; |
73d074b4 DJ |
8181 | if (rcookie->rel->r_offset != offset) |
8182 | continue; | |
8183 | ||
d6fe2dc1 AM |
8184 | r_symndx = ELF_R_SYM (rcookie->rel->r_info); |
8185 | if (r_symndx == SHN_UNDEF) | |
b34976b6 | 8186 | return TRUE; |
d6fe2dc1 | 8187 | |
73d074b4 | 8188 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 8189 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
8190 | { |
8191 | struct elf_link_hash_entry *h; | |
8192 | ||
8193 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
8194 | ||
8195 | while (h->root.type == bfd_link_hash_indirect | |
8196 | || h->root.type == bfd_link_hash_warning) | |
8197 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8198 | ||
8199 | if ((h->root.type == bfd_link_hash_defined | |
8200 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 8201 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 8202 | return TRUE; |
73d074b4 | 8203 | else |
b34976b6 | 8204 | return FALSE; |
73d074b4 | 8205 | } |
6cdc0ccc | 8206 | else |
73d074b4 DJ |
8207 | { |
8208 | /* It's not a relocation against a global symbol, | |
44421011 | 8209 | but it could be a relocation against a local |
73d074b4 DJ |
8210 | symbol for a discarded section. */ |
8211 | asection *isec; | |
6cdc0ccc | 8212 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
8213 | |
8214 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
8215 | isym = &rcookie->locsyms[r_symndx]; |
8216 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 8217 | { |
6cdc0ccc | 8218 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 8219 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 8220 | return TRUE; |
73d074b4 DJ |
8221 | } |
8222 | } | |
b34976b6 | 8223 | return FALSE; |
73d074b4 | 8224 | } |
b34976b6 | 8225 | return FALSE; |
73d074b4 DJ |
8226 | } |
8227 | ||
8228 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 8229 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 8230 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 8231 | which is true for all known assemblers. */ |
73d074b4 | 8232 | |
b34976b6 | 8233 | bfd_boolean |
65765700 JJ |
8234 | elf_bfd_discard_info (output_bfd, info) |
8235 | bfd *output_bfd; | |
73d074b4 DJ |
8236 | struct bfd_link_info *info; |
8237 | { | |
8238 | struct elf_reloc_cookie cookie; | |
126495ed | 8239 | asection *stab, *eh; |
73d074b4 | 8240 | Elf_Internal_Shdr *symtab_hdr; |
73d074b4 DJ |
8241 | struct elf_backend_data *bed; |
8242 | bfd *abfd; | |
99eb2ac8 | 8243 | unsigned int count; |
b34976b6 | 8244 | bfd_boolean ret = FALSE; |
73d074b4 | 8245 | |
d6fe2dc1 | 8246 | if (info->traditional_format |
73d074b4 | 8247 | || info->hash->creator->flavour != bfd_target_elf_flavour |
65765700 | 8248 | || ! is_elf_hash_table (info)) |
b34976b6 | 8249 | return FALSE; |
65765700 | 8250 | |
73d074b4 DJ |
8251 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
8252 | { | |
163c1c30 L |
8253 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
8254 | continue; | |
8255 | ||
73d074b4 DJ |
8256 | bed = get_elf_backend_data (abfd); |
8257 | ||
8258 | if ((abfd->flags & DYNAMIC) != 0) | |
8259 | continue; | |
8260 | ||
126495ed AM |
8261 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
8262 | if (eh != NULL | |
8263 | && (eh->_raw_size == 0 | |
8264 | || bfd_is_abs_section (eh->output_section))) | |
8265 | eh = NULL; | |
65765700 | 8266 | |
99eb2ac8 AM |
8267 | stab = bfd_get_section_by_name (abfd, ".stab"); |
8268 | if (stab != NULL | |
8269 | && (stab->_raw_size == 0 | |
8270 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 8271 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
8272 | stab = NULL; |
8273 | ||
8274 | if (stab == NULL | |
8275 | && eh == NULL | |
8276 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
8277 | continue; |
8278 | ||
8279 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
8280 | cookie.abfd = abfd; |
8281 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
8282 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
8283 | if (cookie.bad_symtab) | |
8284 | { | |
99eb2ac8 | 8285 | cookie.locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); |
73d074b4 DJ |
8286 | cookie.extsymoff = 0; |
8287 | } | |
8288 | else | |
8289 | { | |
8290 | cookie.locsymcount = symtab_hdr->sh_info; | |
8291 | cookie.extsymoff = symtab_hdr->sh_info; | |
8292 | } | |
8293 | ||
6cdc0ccc AM |
8294 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
8295 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 8296 | { |
6cdc0ccc AM |
8297 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
8298 | cookie.locsymcount, 0, | |
8299 | NULL, NULL, NULL); | |
c44233aa | 8300 | if (cookie.locsyms == NULL) |
b34976b6 | 8301 | return FALSE; |
9ad5cbcf | 8302 | } |
73d074b4 | 8303 | |
99eb2ac8 | 8304 | if (stab != NULL) |
73d074b4 | 8305 | { |
99eb2ac8 AM |
8306 | cookie.rels = NULL; |
8307 | count = stab->reloc_count; | |
8308 | if (count != 0) | |
8309 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) | |
8310 | (abfd, stab, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
8311 | info->keep_memory)); | |
8312 | if (cookie.rels != NULL) | |
73d074b4 DJ |
8313 | { |
8314 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
8315 | cookie.relend = cookie.rels; |
8316 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
8317 | if (_bfd_discard_section_stabs (abfd, stab, |
8318 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
8319 | elf_reloc_symbol_deleted_p, |
8320 | &cookie)) | |
b34976b6 | 8321 | ret = TRUE; |
6cdc0ccc | 8322 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
8323 | free (cookie.rels); |
8324 | } | |
8325 | } | |
8326 | ||
99eb2ac8 | 8327 | if (eh != NULL) |
65765700 JJ |
8328 | { |
8329 | cookie.rels = NULL; | |
99eb2ac8 AM |
8330 | count = eh->reloc_count; |
8331 | if (count != 0) | |
65765700 | 8332 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) |
40b829d4 | 8333 | (abfd, eh, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
65765700 | 8334 | info->keep_memory)); |
99eb2ac8 AM |
8335 | cookie.rel = cookie.rels; |
8336 | cookie.relend = cookie.rels; | |
8337 | if (cookie.rels != NULL) | |
8338 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
8339 | ||
126495ed | 8340 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
8341 | elf_reloc_symbol_deleted_p, |
8342 | &cookie)) | |
b34976b6 | 8343 | ret = TRUE; |
99eb2ac8 AM |
8344 | |
8345 | if (cookie.rels != NULL | |
8346 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
8347 | free (cookie.rels); |
8348 | } | |
8349 | ||
99eb2ac8 AM |
8350 | if (bed->elf_backend_discard_info != NULL |
8351 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 8352 | ret = TRUE; |
73d074b4 | 8353 | |
6cdc0ccc AM |
8354 | if (cookie.locsyms != NULL |
8355 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
8356 | { | |
8357 | if (! info->keep_memory) | |
8358 | free (cookie.locsyms); | |
8359 | else | |
8360 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
8361 | } | |
73d074b4 | 8362 | } |
65765700 | 8363 | |
126495ed AM |
8364 | if (info->eh_frame_hdr |
8365 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) | |
b34976b6 | 8366 | ret = TRUE; |
99eb2ac8 | 8367 | |
73d074b4 DJ |
8368 | return ret; |
8369 | } | |
8370 | ||
b34976b6 | 8371 | static bfd_boolean |
73d074b4 DJ |
8372 | elf_section_ignore_discarded_relocs (sec) |
8373 | asection *sec; | |
8374 | { | |
40b829d4 AM |
8375 | struct elf_backend_data *bed; |
8376 | ||
68bfbfcc | 8377 | switch (sec->sec_info_type) |
65765700 JJ |
8378 | { |
8379 | case ELF_INFO_TYPE_STABS: | |
8380 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 8381 | return TRUE; |
65765700 JJ |
8382 | default: |
8383 | break; | |
8384 | } | |
40b829d4 AM |
8385 | |
8386 | bed = get_elf_backend_data (sec->owner); | |
8387 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
8388 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 8389 | return TRUE; |
65765700 | 8390 | |
b34976b6 | 8391 | return FALSE; |
73d074b4 | 8392 | } |