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 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
252b5132 RH |
20 | |
21 | /* ELF linker code. */ | |
22 | ||
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; |
9147e853 JJ |
1171 | struct elf_link_hash_entry **nondeflt_vers = NULL; |
1172 | bfd_size_type nondeflt_vers_cnt = 0; | |
6cdc0ccc AM |
1173 | Elf_Internal_Sym *isymbuf = NULL; |
1174 | Elf_Internal_Sym *isym; | |
1175 | Elf_Internal_Sym *isymend; | |
c61b8717 | 1176 | struct elf_backend_data *bed; |
b34976b6 | 1177 | bfd_boolean dt_needed; |
8ea2e4bd | 1178 | struct elf_link_hash_table * hash_table; |
dc810e39 | 1179 | bfd_size_type amt; |
8ea2e4bd NC |
1180 | |
1181 | hash_table = elf_hash_table (info); | |
252b5132 | 1182 | |
c61b8717 RH |
1183 | bed = get_elf_backend_data (abfd); |
1184 | add_symbol_hook = bed->elf_add_symbol_hook; | |
1185 | collect = bed->collect; | |
252b5132 RH |
1186 | |
1187 | if ((abfd->flags & DYNAMIC) == 0) | |
b34976b6 | 1188 | dynamic = FALSE; |
252b5132 RH |
1189 | else |
1190 | { | |
b34976b6 | 1191 | dynamic = TRUE; |
252b5132 RH |
1192 | |
1193 | /* You can't use -r against a dynamic object. Also, there's no | |
1194 | hope of using a dynamic object which does not exactly match | |
1195 | the format of the output file. */ | |
1196 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
1197 | { | |
1198 | bfd_set_error (bfd_error_invalid_operation); | |
1199 | goto error_return; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | /* As a GNU extension, any input sections which are named | |
1204 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
1205 | symbol. This differs from .gnu.warning sections, which generate | |
1206 | warnings when they are included in an output file. */ | |
1207 | if (! info->shared) | |
1208 | { | |
1209 | asection *s; | |
1210 | ||
1211 | for (s = abfd->sections; s != NULL; s = s->next) | |
1212 | { | |
1213 | const char *name; | |
1214 | ||
1215 | name = bfd_get_section_name (abfd, s); | |
1216 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
1217 | { | |
1218 | char *msg; | |
1219 | bfd_size_type sz; | |
1220 | ||
1221 | name += sizeof ".gnu.warning." - 1; | |
1222 | ||
1223 | /* If this is a shared object, then look up the symbol | |
1224 | in the hash table. If it is there, and it is already | |
1225 | been defined, then we will not be using the entry | |
1226 | from this shared object, so we don't need to warn. | |
1227 | FIXME: If we see the definition in a regular object | |
1228 | later on, we will warn, but we shouldn't. The only | |
1229 | fix is to keep track of what warnings we are supposed | |
1230 | to emit, and then handle them all at the end of the | |
1231 | link. */ | |
1232 | if (dynamic && abfd->xvec == info->hash->creator) | |
1233 | { | |
1234 | struct elf_link_hash_entry *h; | |
1235 | ||
8ea2e4bd | 1236 | h = elf_link_hash_lookup (hash_table, name, |
b34976b6 | 1237 | FALSE, FALSE, TRUE); |
252b5132 RH |
1238 | |
1239 | /* FIXME: What about bfd_link_hash_common? */ | |
1240 | if (h != NULL | |
1241 | && (h->root.type == bfd_link_hash_defined | |
1242 | || h->root.type == bfd_link_hash_defweak)) | |
1243 | { | |
1244 | /* We don't want to issue this warning. Clobber | |
c44233aa AM |
1245 | the section size so that the warning does not |
1246 | get copied into the output file. */ | |
252b5132 RH |
1247 | s->_raw_size = 0; |
1248 | continue; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | sz = bfd_section_size (abfd, s); | |
1253 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
1254 | if (msg == NULL) | |
1255 | goto error_return; | |
1256 | ||
1257 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
1258 | goto error_return; | |
1259 | ||
1260 | msg[sz] = '\0'; | |
1261 | ||
1262 | if (! (_bfd_generic_link_add_one_symbol | |
1263 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, | |
b34976b6 | 1264 | FALSE, collect, (struct bfd_link_hash_entry **) NULL))) |
252b5132 RH |
1265 | goto error_return; |
1266 | ||
1267 | if (! info->relocateable) | |
1268 | { | |
1269 | /* Clobber the section size so that the warning does | |
c44233aa | 1270 | not get copied into the output file. */ |
252b5132 RH |
1271 | s->_raw_size = 0; |
1272 | } | |
1273 | } | |
1274 | } | |
1275 | } | |
1276 | ||
b34976b6 | 1277 | dt_needed = FALSE; |
252b5132 RH |
1278 | if (! dynamic) |
1279 | { | |
1280 | /* If we are creating a shared library, create all the dynamic | |
c44233aa AM |
1281 | sections immediately. We need to attach them to something, |
1282 | so we attach them to this BFD, provided it is the right | |
1283 | format. FIXME: If there are no input BFD's of the same | |
1284 | format as the output, we can't make a shared library. */ | |
252b5132 | 1285 | if (info->shared |
8ea2e4bd NC |
1286 | && is_elf_hash_table (info) |
1287 | && ! hash_table->dynamic_sections_created | |
252b5132 RH |
1288 | && abfd->xvec == info->hash->creator) |
1289 | { | |
1290 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1291 | goto error_return; | |
1292 | } | |
1293 | } | |
8ea2e4bd NC |
1294 | else if (! is_elf_hash_table (info)) |
1295 | goto error_return; | |
252b5132 RH |
1296 | else |
1297 | { | |
1298 | asection *s; | |
b34976b6 | 1299 | bfd_boolean add_needed; |
252b5132 RH |
1300 | const char *name; |
1301 | bfd_size_type oldsize; | |
1302 | bfd_size_type strindex; | |
5d603aa9 | 1303 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
252b5132 | 1304 | |
366f2964 AM |
1305 | /* ld --just-symbols and dynamic objects don't mix very well. |
1306 | Test for --just-symbols by looking at info set up by | |
1307 | _bfd_elf_link_just_syms. */ | |
1308 | if ((s = abfd->sections) != NULL | |
68bfbfcc | 1309 | && s->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) |
366f2964 AM |
1310 | goto error_return; |
1311 | ||
252b5132 RH |
1312 | /* Find the name to use in a DT_NEEDED entry that refers to this |
1313 | object. If the object has a DT_SONAME entry, we use it. | |
1314 | Otherwise, if the generic linker stuck something in | |
1315 | elf_dt_name, we use that. Otherwise, we just use the file | |
1316 | name. If the generic linker put a null string into | |
1317 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
1318 | there is a DT_SONAME entry. */ | |
b34976b6 | 1319 | add_needed = TRUE; |
7913c838 | 1320 | name = bfd_get_filename (abfd); |
252b5132 RH |
1321 | if (elf_dt_name (abfd) != NULL) |
1322 | { | |
1323 | name = elf_dt_name (abfd); | |
1324 | if (*name == '\0') | |
74816898 L |
1325 | { |
1326 | if (elf_dt_soname (abfd) != NULL) | |
b34976b6 | 1327 | dt_needed = TRUE; |
74816898 | 1328 | |
b34976b6 | 1329 | add_needed = FALSE; |
74816898 | 1330 | } |
252b5132 RH |
1331 | } |
1332 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1333 | if (s != NULL) | |
1334 | { | |
6cdc0ccc | 1335 | Elf_External_Dyn *dynbuf = NULL; |
252b5132 RH |
1336 | Elf_External_Dyn *extdyn; |
1337 | Elf_External_Dyn *extdynend; | |
1338 | int elfsec; | |
dc810e39 | 1339 | unsigned long shlink; |
252b5132 | 1340 | |
dc810e39 | 1341 | dynbuf = (Elf_External_Dyn *) bfd_malloc (s->_raw_size); |
252b5132 RH |
1342 | if (dynbuf == NULL) |
1343 | goto error_return; | |
1344 | ||
1345 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
1346 | (file_ptr) 0, s->_raw_size)) | |
6cdc0ccc | 1347 | goto error_free_dyn; |
252b5132 RH |
1348 | |
1349 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1350 | if (elfsec == -1) | |
6cdc0ccc | 1351 | goto error_free_dyn; |
dc810e39 | 1352 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; |
252b5132 RH |
1353 | |
1354 | extdyn = dynbuf; | |
1355 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
1356 | for (; extdyn < extdynend; extdyn++) | |
1357 | { | |
1358 | Elf_Internal_Dyn dyn; | |
1359 | ||
1360 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
1361 | if (dyn.d_tag == DT_SONAME) | |
1362 | { | |
dc810e39 AM |
1363 | unsigned int tagv = dyn.d_un.d_val; |
1364 | name = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1365 | if (name == NULL) |
6cdc0ccc | 1366 | goto error_free_dyn; |
252b5132 RH |
1367 | } |
1368 | if (dyn.d_tag == DT_NEEDED) | |
1369 | { | |
1370 | struct bfd_link_needed_list *n, **pn; | |
1371 | char *fnm, *anm; | |
dc810e39 | 1372 | unsigned int tagv = dyn.d_un.d_val; |
252b5132 | 1373 | |
dc810e39 AM |
1374 | amt = sizeof (struct bfd_link_needed_list); |
1375 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1376 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1377 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1378 | goto error_free_dyn; |
d4c88bbb AM |
1379 | amt = strlen (fnm) + 1; |
1380 | anm = bfd_alloc (abfd, amt); | |
252b5132 | 1381 | if (anm == NULL) |
6cdc0ccc | 1382 | goto error_free_dyn; |
d4c88bbb | 1383 | memcpy (anm, fnm, (size_t) amt); |
252b5132 RH |
1384 | n->name = anm; |
1385 | n->by = abfd; | |
1386 | n->next = NULL; | |
8ea2e4bd | 1387 | for (pn = & hash_table->needed; |
252b5132 RH |
1388 | *pn != NULL; |
1389 | pn = &(*pn)->next) | |
1390 | ; | |
1391 | *pn = n; | |
1392 | } | |
a963dc6a L |
1393 | if (dyn.d_tag == DT_RUNPATH) |
1394 | { | |
1395 | struct bfd_link_needed_list *n, **pn; | |
1396 | char *fnm, *anm; | |
dc810e39 | 1397 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1398 | |
dc810e39 AM |
1399 | amt = sizeof (struct bfd_link_needed_list); |
1400 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1401 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1402 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1403 | goto error_free_dyn; |
d4c88bbb AM |
1404 | amt = strlen (fnm) + 1; |
1405 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1406 | if (anm == NULL) |
6cdc0ccc | 1407 | goto error_free_dyn; |
d4c88bbb | 1408 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1409 | n->name = anm; |
1410 | n->by = abfd; | |
1411 | n->next = NULL; | |
5d603aa9 | 1412 | for (pn = & runpath; |
a963dc6a L |
1413 | *pn != NULL; |
1414 | pn = &(*pn)->next) | |
1415 | ; | |
1416 | *pn = n; | |
a963dc6a | 1417 | } |
3e932841 | 1418 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ |
a963dc6a | 1419 | if (!runpath && dyn.d_tag == DT_RPATH) |
c44233aa | 1420 | { |
a963dc6a L |
1421 | struct bfd_link_needed_list *n, **pn; |
1422 | char *fnm, *anm; | |
dc810e39 | 1423 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1424 | |
dc810e39 AM |
1425 | amt = sizeof (struct bfd_link_needed_list); |
1426 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1427 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1428 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1429 | goto error_free_dyn; |
d4c88bbb AM |
1430 | amt = strlen (fnm) + 1; |
1431 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1432 | if (anm == NULL) |
6cdc0ccc AM |
1433 | { |
1434 | error_free_dyn: | |
1435 | free (dynbuf); | |
1436 | goto error_return; | |
1437 | } | |
d4c88bbb | 1438 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1439 | n->name = anm; |
1440 | n->by = abfd; | |
1441 | n->next = NULL; | |
5d603aa9 | 1442 | for (pn = & rpath; |
a963dc6a L |
1443 | *pn != NULL; |
1444 | pn = &(*pn)->next) | |
1445 | ; | |
1446 | *pn = n; | |
a963dc6a | 1447 | } |
252b5132 RH |
1448 | } |
1449 | ||
1450 | free (dynbuf); | |
252b5132 RH |
1451 | } |
1452 | ||
5d603aa9 L |
1453 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that |
1454 | frees all more recently bfd_alloc'd blocks as well. */ | |
1455 | if (runpath) | |
1456 | rpath = runpath; | |
1457 | ||
1458 | if (rpath) | |
1459 | { | |
1460 | struct bfd_link_needed_list **pn; | |
1461 | for (pn = & hash_table->runpath; | |
1462 | *pn != NULL; | |
1463 | pn = &(*pn)->next) | |
1464 | ; | |
1465 | *pn = rpath; | |
1466 | } | |
1467 | ||
252b5132 RH |
1468 | /* We do not want to include any of the sections in a dynamic |
1469 | object in the output file. We hack by simply clobbering the | |
1470 | list of sections in the BFD. This could be handled more | |
1471 | cleanly by, say, a new section flag; the existing | |
1472 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
1473 | still implies that the section takes up space in the output | |
1474 | file. */ | |
c601ffdb | 1475 | bfd_section_list_clear (abfd); |
252b5132 RH |
1476 | |
1477 | /* If this is the first dynamic object found in the link, create | |
1478 | the special sections required for dynamic linking. */ | |
8ea2e4bd NC |
1479 | if (! hash_table->dynamic_sections_created) |
1480 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1481 | goto error_return; | |
252b5132 RH |
1482 | |
1483 | if (add_needed) | |
1484 | { | |
1485 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
2b0f7ef9 | 1486 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
b34976b6 | 1487 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, name, FALSE); |
252b5132 RH |
1488 | if (strindex == (bfd_size_type) -1) |
1489 | goto error_return; | |
1490 | ||
2b0f7ef9 | 1491 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
252b5132 RH |
1492 | { |
1493 | asection *sdyn; | |
1494 | Elf_External_Dyn *dyncon, *dynconend; | |
1495 | ||
1496 | /* The hash table size did not change, which means that | |
1497 | the dynamic object name was already entered. If we | |
1498 | have already included this dynamic object in the | |
1499 | link, just ignore it. There is no reason to include | |
1500 | a particular dynamic object more than once. */ | |
8ea2e4bd | 1501 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); |
252b5132 RH |
1502 | BFD_ASSERT (sdyn != NULL); |
1503 | ||
1504 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
1505 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
1506 | sdyn->_raw_size); | |
1507 | for (; dyncon < dynconend; dyncon++) | |
1508 | { | |
1509 | Elf_Internal_Dyn dyn; | |
1510 | ||
8ea2e4bd | 1511 | elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn); |
252b5132 RH |
1512 | if (dyn.d_tag == DT_NEEDED |
1513 | && dyn.d_un.d_val == strindex) | |
1514 | { | |
2b0f7ef9 | 1515 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); |
b34976b6 | 1516 | return TRUE; |
252b5132 RH |
1517 | } |
1518 | } | |
1519 | } | |
1520 | ||
dc810e39 | 1521 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
252b5132 RH |
1522 | goto error_return; |
1523 | } | |
1524 | ||
1525 | /* Save the SONAME, if there is one, because sometimes the | |
c44233aa | 1526 | linker emulation code will need to know it. */ |
252b5132 | 1527 | if (*name == '\0') |
210ba1e8 | 1528 | name = basename (bfd_get_filename (abfd)); |
252b5132 RH |
1529 | elf_dt_name (abfd) = name; |
1530 | } | |
1531 | ||
6cdc0ccc AM |
1532 | /* If this is a dynamic object, we always link against the .dynsym |
1533 | symbol table, not the .symtab symbol table. The dynamic linker | |
1534 | will only see the .dynsym symbol table, so there is no reason to | |
1535 | look at .symtab for a dynamic object. */ | |
1536 | ||
1537 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
1538 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1539 | else | |
1540 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1541 | ||
1542 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
1543 | ||
1544 | /* The sh_info field of the symtab header tells us where the | |
1545 | external symbols start. We don't care about the local symbols at | |
1546 | this point. */ | |
1547 | if (elf_bad_symtab (abfd)) | |
1548 | { | |
1549 | extsymcount = symcount; | |
1550 | extsymoff = 0; | |
1551 | } | |
1552 | else | |
1553 | { | |
1554 | extsymcount = symcount - hdr->sh_info; | |
1555 | extsymoff = hdr->sh_info; | |
1556 | } | |
252b5132 | 1557 | |
6cdc0ccc AM |
1558 | sym_hash = NULL; |
1559 | if (extsymcount != 0) | |
9ad5cbcf | 1560 | { |
6cdc0ccc AM |
1561 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, |
1562 | NULL, NULL, NULL); | |
1563 | if (isymbuf == NULL) | |
9ad5cbcf | 1564 | goto error_return; |
6cdc0ccc AM |
1565 | |
1566 | /* We store a pointer to the hash table entry for each external | |
1567 | symbol. */ | |
1568 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
1569 | sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt); | |
1570 | if (sym_hash == NULL) | |
1571 | goto error_free_sym; | |
1572 | elf_sym_hashes (abfd) = sym_hash; | |
1573 | } | |
1574 | ||
1575 | if (dynamic) | |
1576 | { | |
1577 | /* Read in any version definitions. */ | |
1578 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1579 | goto error_free_sym; | |
1580 | ||
1581 | /* Read in the symbol versions, but don't bother to convert them | |
1582 | to internal format. */ | |
1583 | if (elf_dynversym (abfd) != 0) | |
1584 | { | |
1585 | Elf_Internal_Shdr *versymhdr; | |
1586 | ||
1587 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1588 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
1589 | if (extversym == NULL) | |
1590 | goto error_free_sym; | |
1591 | amt = versymhdr->sh_size; | |
1592 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
1593 | || bfd_bread ((PTR) extversym, amt, abfd) != amt) | |
1594 | goto error_free_vers; | |
1595 | } | |
9ad5cbcf AM |
1596 | } |
1597 | ||
252b5132 RH |
1598 | weaks = NULL; |
1599 | ||
1600 | ever = extversym != NULL ? extversym + extsymoff : NULL; | |
6cdc0ccc AM |
1601 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
1602 | isym < isymend; | |
1603 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
252b5132 | 1604 | { |
252b5132 RH |
1605 | int bind; |
1606 | bfd_vma value; | |
1607 | asection *sec; | |
1608 | flagword flags; | |
1609 | const char *name; | |
1610 | struct elf_link_hash_entry *h; | |
b34976b6 AM |
1611 | bfd_boolean definition; |
1612 | bfd_boolean size_change_ok, type_change_ok; | |
1613 | bfd_boolean new_weakdef; | |
252b5132 | 1614 | unsigned int old_alignment; |
b34976b6 | 1615 | bfd_boolean override; |
215007a6 | 1616 | |
b34976b6 | 1617 | override = FALSE; |
252b5132 | 1618 | |
252b5132 RH |
1619 | flags = BSF_NO_FLAGS; |
1620 | sec = NULL; | |
6cdc0ccc | 1621 | value = isym->st_value; |
252b5132 RH |
1622 | *sym_hash = NULL; |
1623 | ||
6cdc0ccc | 1624 | bind = ELF_ST_BIND (isym->st_info); |
252b5132 RH |
1625 | if (bind == STB_LOCAL) |
1626 | { | |
1627 | /* This should be impossible, since ELF requires that all | |
1628 | global symbols follow all local symbols, and that sh_info | |
1629 | point to the first global symbol. Unfortunatealy, Irix 5 | |
1630 | screws this up. */ | |
1631 | continue; | |
1632 | } | |
1633 | else if (bind == STB_GLOBAL) | |
1634 | { | |
6cdc0ccc AM |
1635 | if (isym->st_shndx != SHN_UNDEF |
1636 | && isym->st_shndx != SHN_COMMON) | |
252b5132 | 1637 | flags = BSF_GLOBAL; |
252b5132 RH |
1638 | } |
1639 | else if (bind == STB_WEAK) | |
1640 | flags = BSF_WEAK; | |
1641 | else | |
1642 | { | |
1643 | /* Leave it up to the processor backend. */ | |
1644 | } | |
1645 | ||
6cdc0ccc | 1646 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1647 | sec = bfd_und_section_ptr; |
6cdc0ccc | 1648 | else if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 | 1649 | { |
6cdc0ccc | 1650 | sec = section_from_elf_index (abfd, isym->st_shndx); |
252b5132 RH |
1651 | if (sec == NULL) |
1652 | sec = bfd_abs_section_ptr; | |
1653 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1654 | value -= sec->vma; | |
1655 | } | |
6cdc0ccc | 1656 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1657 | sec = bfd_abs_section_ptr; |
6cdc0ccc | 1658 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1659 | { |
1660 | sec = bfd_com_section_ptr; | |
1661 | /* What ELF calls the size we call the value. What ELF | |
1662 | calls the value we call the alignment. */ | |
6cdc0ccc | 1663 | value = isym->st_size; |
252b5132 RH |
1664 | } |
1665 | else | |
1666 | { | |
1667 | /* Leave it up to the processor backend. */ | |
1668 | } | |
1669 | ||
6cdc0ccc AM |
1670 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
1671 | isym->st_name); | |
252b5132 | 1672 | if (name == (const char *) NULL) |
6cdc0ccc | 1673 | goto error_free_vers; |
252b5132 | 1674 | |
6cdc0ccc AM |
1675 | if (isym->st_shndx == SHN_COMMON |
1676 | && ELF_ST_TYPE (isym->st_info) == STT_TLS) | |
13ae64f3 JJ |
1677 | { |
1678 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
1679 | ||
1680 | if (tcomm == NULL) | |
1681 | { | |
1682 | tcomm = bfd_make_section (abfd, ".tcommon"); | |
1683 | if (tcomm == NULL | |
1684 | || !bfd_set_section_flags (abfd, tcomm, (SEC_ALLOC | |
1685 | | SEC_IS_COMMON | |
1686 | | SEC_LINKER_CREATED | |
1687 | | SEC_THREAD_LOCAL))) | |
6cdc0ccc | 1688 | goto error_free_vers; |
13ae64f3 JJ |
1689 | } |
1690 | sec = tcomm; | |
1691 | } | |
1692 | else if (add_symbol_hook) | |
252b5132 | 1693 | { |
6cdc0ccc | 1694 | if (! (*add_symbol_hook) (abfd, info, isym, &name, &flags, &sec, |
252b5132 | 1695 | &value)) |
6cdc0ccc | 1696 | goto error_free_vers; |
252b5132 RH |
1697 | |
1698 | /* The hook function sets the name to NULL if this symbol | |
1699 | should be skipped for some reason. */ | |
1700 | if (name == (const char *) NULL) | |
1701 | continue; | |
1702 | } | |
1703 | ||
1704 | /* Sanity check that all possibilities were handled. */ | |
1705 | if (sec == (asection *) NULL) | |
1706 | { | |
1707 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1708 | goto error_free_vers; |
252b5132 RH |
1709 | } |
1710 | ||
1711 | if (bfd_is_und_section (sec) | |
1712 | || bfd_is_com_section (sec)) | |
b34976b6 | 1713 | definition = FALSE; |
252b5132 | 1714 | else |
b34976b6 | 1715 | definition = TRUE; |
252b5132 | 1716 | |
b34976b6 | 1717 | size_change_ok = FALSE; |
252b5132 RH |
1718 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
1719 | old_alignment = 0; | |
1720 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1721 | { | |
1722 | Elf_Internal_Versym iver; | |
1723 | unsigned int vernum = 0; | |
252b5132 RH |
1724 | |
1725 | if (ever != NULL) | |
1726 | { | |
1727 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
1728 | vernum = iver.vs_vers & VERSYM_VERSION; | |
1729 | ||
1730 | /* If this is a hidden symbol, or if it is not version | |
c44233aa AM |
1731 | 1, we append the version name to the symbol name. |
1732 | However, we do not modify a non-hidden absolute | |
1733 | symbol, because it might be the version symbol | |
1734 | itself. FIXME: What if it isn't? */ | |
252b5132 RH |
1735 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
1736 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
1737 | { | |
1738 | const char *verstr; | |
d4c88bbb | 1739 | size_t namelen, verlen, newlen; |
252b5132 RH |
1740 | char *newname, *p; |
1741 | ||
6cdc0ccc | 1742 | if (isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1743 | { |
1744 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) | |
1745 | { | |
1746 | (*_bfd_error_handler) | |
1747 | (_("%s: %s: invalid version %u (max %d)"), | |
8f615d07 | 1748 | bfd_archive_filename (abfd), name, vernum, |
252b5132 RH |
1749 | elf_tdata (abfd)->dynverdef_hdr.sh_info); |
1750 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1751 | goto error_free_vers; |
252b5132 RH |
1752 | } |
1753 | else if (vernum > 1) | |
1754 | verstr = | |
1755 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1756 | else | |
1757 | verstr = ""; | |
1758 | } | |
1759 | else | |
1760 | { | |
1761 | /* We cannot simply test for the number of | |
1762 | entries in the VERNEED section since the | |
1763 | numbers for the needed versions do not start | |
1764 | at 0. */ | |
1765 | Elf_Internal_Verneed *t; | |
1766 | ||
1767 | verstr = NULL; | |
1768 | for (t = elf_tdata (abfd)->verref; | |
1769 | t != NULL; | |
1770 | t = t->vn_nextref) | |
1771 | { | |
1772 | Elf_Internal_Vernaux *a; | |
1773 | ||
1774 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1775 | { | |
1776 | if (a->vna_other == vernum) | |
1777 | { | |
1778 | verstr = a->vna_nodename; | |
1779 | break; | |
1780 | } | |
1781 | } | |
1782 | if (a != NULL) | |
1783 | break; | |
1784 | } | |
1785 | if (verstr == NULL) | |
1786 | { | |
1787 | (*_bfd_error_handler) | |
1788 | (_("%s: %s: invalid needed version %d"), | |
8f615d07 | 1789 | bfd_archive_filename (abfd), name, vernum); |
252b5132 | 1790 | bfd_set_error (bfd_error_bad_value); |
6cdc0ccc | 1791 | goto error_free_vers; |
252b5132 RH |
1792 | } |
1793 | } | |
1794 | ||
1795 | namelen = strlen (name); | |
d4c88bbb AM |
1796 | verlen = strlen (verstr); |
1797 | newlen = namelen + verlen + 2; | |
1798 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1799 | && isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1800 | ++newlen; |
1801 | ||
d4c88bbb | 1802 | newname = (char *) bfd_alloc (abfd, (bfd_size_type) newlen); |
252b5132 | 1803 | if (newname == NULL) |
6cdc0ccc | 1804 | goto error_free_vers; |
d4c88bbb | 1805 | memcpy (newname, name, namelen); |
252b5132 RH |
1806 | p = newname + namelen; |
1807 | *p++ = ELF_VER_CHR; | |
1287d1cc ILT |
1808 | /* If this is a defined non-hidden version symbol, |
1809 | we add another @ to the name. This indicates the | |
1810 | default version of the symbol. */ | |
1811 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1812 | && isym->st_shndx != SHN_UNDEF) |
252b5132 | 1813 | *p++ = ELF_VER_CHR; |
d4c88bbb | 1814 | memcpy (p, verstr, verlen + 1); |
252b5132 RH |
1815 | |
1816 | name = newname; | |
1817 | } | |
1818 | } | |
1819 | ||
6cdc0ccc | 1820 | if (! elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
252b5132 | 1821 | sym_hash, &override, &type_change_ok, |
456981d7 | 1822 | &size_change_ok, dt_needed)) |
6cdc0ccc | 1823 | goto error_free_vers; |
252b5132 RH |
1824 | |
1825 | if (override) | |
b34976b6 | 1826 | definition = FALSE; |
252b5132 RH |
1827 | |
1828 | h = *sym_hash; | |
1829 | while (h->root.type == bfd_link_hash_indirect | |
1830 | || h->root.type == bfd_link_hash_warning) | |
1831 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1832 | ||
1833 | /* Remember the old alignment if this is a common symbol, so | |
c44233aa AM |
1834 | that we don't reduce the alignment later on. We can't |
1835 | check later, because _bfd_generic_link_add_one_symbol | |
1836 | will set a default for the alignment which we want to | |
1837 | override. */ | |
252b5132 RH |
1838 | if (h->root.type == bfd_link_hash_common) |
1839 | old_alignment = h->root.u.c.p->alignment_power; | |
1840 | ||
1841 | if (elf_tdata (abfd)->verdef != NULL | |
1842 | && ! override | |
1843 | && vernum > 1 | |
1844 | && definition) | |
1845 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
1846 | } | |
1847 | ||
1848 | if (! (_bfd_generic_link_add_one_symbol | |
1849 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
b34976b6 | 1850 | FALSE, collect, (struct bfd_link_hash_entry **) sym_hash))) |
6cdc0ccc | 1851 | goto error_free_vers; |
252b5132 RH |
1852 | |
1853 | h = *sym_hash; | |
1854 | while (h->root.type == bfd_link_hash_indirect | |
1855 | || h->root.type == bfd_link_hash_warning) | |
1856 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1857 | *sym_hash = h; | |
1858 | ||
b34976b6 | 1859 | new_weakdef = FALSE; |
252b5132 RH |
1860 | if (dynamic |
1861 | && definition | |
1862 | && (flags & BSF_WEAK) != 0 | |
6cdc0ccc | 1863 | && ELF_ST_TYPE (isym->st_info) != STT_FUNC |
252b5132 RH |
1864 | && info->hash->creator->flavour == bfd_target_elf_flavour |
1865 | && h->weakdef == NULL) | |
1866 | { | |
1867 | /* Keep a list of all weak defined non function symbols from | |
1868 | a dynamic object, using the weakdef field. Later in this | |
1869 | function we will set the weakdef field to the correct | |
1870 | value. We only put non-function symbols from dynamic | |
1871 | objects on this list, because that happens to be the only | |
1872 | time we need to know the normal symbol corresponding to a | |
1873 | weak symbol, and the information is time consuming to | |
1874 | figure out. If the weakdef field is not already NULL, | |
1875 | then this symbol was already defined by some previous | |
1876 | dynamic object, and we will be using that previous | |
1877 | definition anyhow. */ | |
1878 | ||
1879 | h->weakdef = weaks; | |
1880 | weaks = h; | |
b34976b6 | 1881 | new_weakdef = TRUE; |
252b5132 RH |
1882 | } |
1883 | ||
1884 | /* Set the alignment of a common symbol. */ | |
6cdc0ccc | 1885 | if (isym->st_shndx == SHN_COMMON |
252b5132 RH |
1886 | && h->root.type == bfd_link_hash_common) |
1887 | { | |
1888 | unsigned int align; | |
1889 | ||
6cdc0ccc | 1890 | align = bfd_log2 (isym->st_value); |
724982f6 NC |
1891 | if (align > old_alignment |
1892 | /* Permit an alignment power of zero if an alignment of one | |
1893 | is specified and no other alignments have been specified. */ | |
6cdc0ccc | 1894 | || (isym->st_value == 1 && old_alignment == 0)) |
252b5132 RH |
1895 | h->root.u.c.p->alignment_power = align; |
1896 | } | |
1897 | ||
1898 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1899 | { | |
1900 | int old_flags; | |
b34976b6 | 1901 | bfd_boolean dynsym; |
252b5132 RH |
1902 | int new_flag; |
1903 | ||
1904 | /* Remember the symbol size and type. */ | |
6cdc0ccc | 1905 | if (isym->st_size != 0 |
252b5132 RH |
1906 | && (definition || h->size == 0)) |
1907 | { | |
6cdc0ccc | 1908 | if (h->size != 0 && h->size != isym->st_size && ! size_change_ok) |
252b5132 RH |
1909 | (*_bfd_error_handler) |
1910 | (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"), | |
6cdc0ccc AM |
1911 | name, (unsigned long) h->size, |
1912 | (unsigned long) isym->st_size, bfd_archive_filename (abfd)); | |
252b5132 | 1913 | |
6cdc0ccc | 1914 | h->size = isym->st_size; |
252b5132 RH |
1915 | } |
1916 | ||
1917 | /* If this is a common symbol, then we always want H->SIZE | |
c44233aa AM |
1918 | to be the size of the common symbol. The code just above |
1919 | won't fix the size if a common symbol becomes larger. We | |
1920 | don't warn about a size change here, because that is | |
1921 | covered by --warn-common. */ | |
252b5132 RH |
1922 | if (h->root.type == bfd_link_hash_common) |
1923 | h->size = h->root.u.c.size; | |
1924 | ||
6cdc0ccc | 1925 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE |
252b5132 RH |
1926 | && (definition || h->type == STT_NOTYPE)) |
1927 | { | |
1928 | if (h->type != STT_NOTYPE | |
6cdc0ccc | 1929 | && h->type != ELF_ST_TYPE (isym->st_info) |
252b5132 RH |
1930 | && ! type_change_ok) |
1931 | (*_bfd_error_handler) | |
1932 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
6cdc0ccc | 1933 | name, h->type, ELF_ST_TYPE (isym->st_info), |
8f615d07 | 1934 | bfd_archive_filename (abfd)); |
252b5132 | 1935 | |
6cdc0ccc | 1936 | h->type = ELF_ST_TYPE (isym->st_info); |
252b5132 RH |
1937 | } |
1938 | ||
7a13edea NC |
1939 | /* If st_other has a processor-specific meaning, specific code |
1940 | might be needed here. */ | |
6cdc0ccc | 1941 | if (isym->st_other != 0) |
7a13edea | 1942 | { |
7c25b72c RH |
1943 | unsigned char hvis, symvis, other; |
1944 | ||
1945 | /* Take the balance of OTHER from the definition. */ | |
1946 | other = (definition ? isym->st_other : h->other); | |
1947 | other &= ~ ELF_ST_VISIBILITY (-1); | |
1948 | ||
7a13edea | 1949 | /* Combine visibilities, using the most constraining one. */ |
7c25b72c RH |
1950 | hvis = ELF_ST_VISIBILITY (h->other); |
1951 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
1952 | ||
1953 | h->other = other | (hvis > symvis ? hvis : symvis); | |
7a13edea | 1954 | } |
252b5132 RH |
1955 | |
1956 | /* Set a flag in the hash table entry indicating the type of | |
1957 | reference or definition we just found. Keep a count of | |
1958 | the number of dynamic symbols we find. A dynamic symbol | |
1959 | is one which is referenced or defined by both a regular | |
1960 | object and a shared object. */ | |
1961 | old_flags = h->elf_link_hash_flags; | |
b34976b6 | 1962 | dynsym = FALSE; |
252b5132 RH |
1963 | if (! dynamic) |
1964 | { | |
1965 | if (! definition) | |
1966 | { | |
1967 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1968 | if (bind != STB_WEAK) | |
1969 | new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK; | |
1970 | } | |
1971 | else | |
1972 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1973 | if (info->shared | |
1974 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1975 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
b34976b6 | 1976 | dynsym = TRUE; |
252b5132 RH |
1977 | } |
1978 | else | |
1979 | { | |
1980 | if (! definition) | |
1981 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1982 | else | |
1983 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
1984 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
1985 | | ELF_LINK_HASH_REF_REGULAR)) != 0 | |
1986 | || (h->weakdef != NULL | |
1987 | && ! new_weakdef | |
1988 | && h->weakdef->dynindx != -1)) | |
b34976b6 | 1989 | dynsym = TRUE; |
252b5132 RH |
1990 | } |
1991 | ||
1992 | h->elf_link_hash_flags |= new_flag; | |
1993 | ||
215007a6 L |
1994 | /* Check to see if we need to add an indirect symbol for |
1995 | the default name. */ | |
051b8577 | 1996 | if (definition || h->root.type == bfd_link_hash_common) |
6cdc0ccc | 1997 | if (! elf_add_default_symbol (abfd, info, h, name, isym, |
215007a6 L |
1998 | &sec, &value, &dynsym, |
1999 | override, dt_needed)) | |
6cdc0ccc | 2000 | goto error_free_vers; |
252b5132 | 2001 | |
9147e853 JJ |
2002 | if (definition && (abfd->flags & DYNAMIC) == 0) |
2003 | { | |
2004 | char *p = strchr (name, ELF_VER_CHR); | |
2005 | if (p != NULL && p[1] != ELF_VER_CHR) | |
2006 | { | |
2007 | /* Queue non-default versions so that .symver x, x@FOO | |
2008 | aliases can be checked. */ | |
2009 | if (! nondeflt_vers) | |
2010 | { | |
2011 | amt = (isymend - isym + 1) | |
2012 | * sizeof (struct elf_link_hash_entry *); | |
2013 | nondeflt_vers = bfd_malloc (amt); | |
2014 | } | |
2015 | nondeflt_vers [nondeflt_vers_cnt++] = h; | |
2016 | } | |
2017 | } | |
2018 | ||
252b5132 RH |
2019 | if (dynsym && h->dynindx == -1) |
2020 | { | |
2021 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
6cdc0ccc | 2022 | goto error_free_vers; |
252b5132 RH |
2023 | if (h->weakdef != NULL |
2024 | && ! new_weakdef | |
2025 | && h->weakdef->dynindx == -1) | |
2026 | { | |
a7b97311 | 2027 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) |
6cdc0ccc | 2028 | goto error_free_vers; |
252b5132 RH |
2029 | } |
2030 | } | |
38048eb9 | 2031 | else if (dynsym && h->dynindx != -1) |
0444bdd4 L |
2032 | /* If the symbol already has a dynamic index, but |
2033 | visibility says it should not be visible, turn it into | |
2034 | a local symbol. */ | |
2035 | switch (ELF_ST_VISIBILITY (h->other)) | |
2036 | { | |
2037 | case STV_INTERNAL: | |
3e932841 | 2038 | case STV_HIDDEN: |
b34976b6 | 2039 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
0444bdd4 L |
2040 | break; |
2041 | } | |
74816898 L |
2042 | |
2043 | if (dt_needed && definition | |
2044 | && (h->elf_link_hash_flags | |
2045 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
2046 | { | |
2047 | bfd_size_type oldsize; | |
2048 | bfd_size_type strindex; | |
2049 | ||
8ea2e4bd | 2050 | if (! is_elf_hash_table (info)) |
6cdc0ccc | 2051 | goto error_free_vers; |
8ea2e4bd | 2052 | |
74816898 | 2053 | /* The symbol from a DT_NEEDED object is referenced from |
c44233aa | 2054 | the regular object to create a dynamic executable. We |
3e932841 | 2055 | have to make sure there is a DT_NEEDED entry for it. */ |
74816898 | 2056 | |
b34976b6 | 2057 | dt_needed = FALSE; |
2b0f7ef9 JJ |
2058 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
2059 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, | |
b34976b6 | 2060 | elf_dt_soname (abfd), FALSE); |
74816898 | 2061 | if (strindex == (bfd_size_type) -1) |
6cdc0ccc | 2062 | goto error_free_vers; |
74816898 | 2063 | |
2b0f7ef9 | 2064 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
74816898 L |
2065 | { |
2066 | asection *sdyn; | |
2067 | Elf_External_Dyn *dyncon, *dynconend; | |
2068 | ||
8ea2e4bd | 2069 | sdyn = bfd_get_section_by_name (hash_table->dynobj, |
74816898 L |
2070 | ".dynamic"); |
2071 | BFD_ASSERT (sdyn != NULL); | |
2072 | ||
2073 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
2074 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
2075 | sdyn->_raw_size); | |
2076 | for (; dyncon < dynconend; dyncon++) | |
2077 | { | |
2078 | Elf_Internal_Dyn dyn; | |
2079 | ||
8ea2e4bd | 2080 | elf_swap_dyn_in (hash_table->dynobj, |
74816898 L |
2081 | dyncon, &dyn); |
2082 | BFD_ASSERT (dyn.d_tag != DT_NEEDED || | |
2083 | dyn.d_un.d_val != strindex); | |
2084 | } | |
2085 | } | |
2086 | ||
dc810e39 | 2087 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
6cdc0ccc | 2088 | goto error_free_vers; |
74816898 | 2089 | } |
252b5132 RH |
2090 | } |
2091 | } | |
2092 | ||
9147e853 JJ |
2093 | /* Now that all the symbols from this input file are created, handle |
2094 | .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */ | |
2095 | if (nondeflt_vers != NULL) | |
2096 | { | |
2097 | bfd_size_type cnt, symidx; | |
2098 | ||
2099 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
2100 | { | |
2101 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
2102 | char *shortname, *p; | |
2103 | ||
2104 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2105 | if (p == NULL | |
2106 | || (h->root.type != bfd_link_hash_defined | |
2107 | && h->root.type != bfd_link_hash_defweak)) | |
2108 | continue; | |
2109 | ||
2110 | amt = p - h->root.root.string; | |
2111 | shortname = bfd_malloc (amt + 1); | |
2112 | memcpy (shortname, h->root.root.string, amt); | |
2113 | shortname[amt] = '\0'; | |
2114 | ||
2115 | hi = (struct elf_link_hash_entry *) | |
2116 | bfd_link_hash_lookup (info->hash, shortname, | |
2117 | FALSE, FALSE, FALSE); | |
2118 | if (hi != NULL | |
2119 | && hi->root.type == h->root.type | |
2120 | && hi->root.u.def.value == h->root.u.def.value | |
2121 | && hi->root.u.def.section == h->root.u.def.section) | |
2122 | { | |
2123 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
2124 | hi->root.type = bfd_link_hash_indirect; | |
2125 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
2126 | (*bed->elf_backend_copy_indirect_symbol) (bed, h, hi); | |
2127 | sym_hash = elf_sym_hashes (abfd); | |
2128 | if (sym_hash) | |
2129 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
2130 | if (sym_hash[symidx] == hi) | |
2131 | { | |
2132 | sym_hash[symidx] = h; | |
2133 | break; | |
2134 | } | |
2135 | } | |
2136 | free (shortname); | |
2137 | } | |
2138 | free (nondeflt_vers); | |
2139 | nondeflt_vers = NULL; | |
2140 | } | |
2141 | ||
6cdc0ccc AM |
2142 | if (extversym != NULL) |
2143 | { | |
2144 | free (extversym); | |
2145 | extversym = NULL; | |
2146 | } | |
2147 | ||
2148 | if (isymbuf != NULL) | |
2149 | free (isymbuf); | |
2150 | isymbuf = NULL; | |
2151 | ||
252b5132 RH |
2152 | /* Now set the weakdefs field correctly for all the weak defined |
2153 | symbols we found. The only way to do this is to search all the | |
2154 | symbols. Since we only need the information for non functions in | |
2155 | dynamic objects, that's the only time we actually put anything on | |
2156 | the list WEAKS. We need this information so that if a regular | |
2157 | object refers to a symbol defined weakly in a dynamic object, the | |
2158 | real symbol in the dynamic object is also put in the dynamic | |
2159 | symbols; we also must arrange for both symbols to point to the | |
2160 | same memory location. We could handle the general case of symbol | |
2161 | aliasing, but a general symbol alias can only be generated in | |
2162 | assembler code, handling it correctly would be very time | |
2163 | consuming, and other ELF linkers don't handle general aliasing | |
2164 | either. */ | |
2165 | while (weaks != NULL) | |
2166 | { | |
2167 | struct elf_link_hash_entry *hlook; | |
2168 | asection *slook; | |
2169 | bfd_vma vlook; | |
2170 | struct elf_link_hash_entry **hpp; | |
2171 | struct elf_link_hash_entry **hppend; | |
2172 | ||
2173 | hlook = weaks; | |
2174 | weaks = hlook->weakdef; | |
2175 | hlook->weakdef = NULL; | |
2176 | ||
2177 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
2178 | || hlook->root.type == bfd_link_hash_defweak | |
2179 | || hlook->root.type == bfd_link_hash_common | |
2180 | || hlook->root.type == bfd_link_hash_indirect); | |
2181 | slook = hlook->root.u.def.section; | |
2182 | vlook = hlook->root.u.def.value; | |
2183 | ||
2184 | hpp = elf_sym_hashes (abfd); | |
2185 | hppend = hpp + extsymcount; | |
2186 | for (; hpp < hppend; hpp++) | |
2187 | { | |
2188 | struct elf_link_hash_entry *h; | |
2189 | ||
2190 | h = *hpp; | |
2191 | if (h != NULL && h != hlook | |
2192 | && h->root.type == bfd_link_hash_defined | |
2193 | && h->root.u.def.section == slook | |
2194 | && h->root.u.def.value == vlook) | |
2195 | { | |
2196 | hlook->weakdef = h; | |
2197 | ||
2198 | /* If the weak definition is in the list of dynamic | |
2199 | symbols, make sure the real definition is put there | |
2200 | as well. */ | |
2201 | if (hlook->dynindx != -1 | |
2202 | && h->dynindx == -1) | |
2203 | { | |
2204 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2205 | goto error_return; | |
2206 | } | |
2207 | ||
2208 | /* If the real definition is in the list of dynamic | |
c44233aa AM |
2209 | symbols, make sure the weak definition is put there |
2210 | as well. If we don't do this, then the dynamic | |
2211 | loader might not merge the entries for the real | |
2212 | definition and the weak definition. */ | |
252b5132 RH |
2213 | if (h->dynindx != -1 |
2214 | && hlook->dynindx == -1) | |
2215 | { | |
2216 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
2217 | goto error_return; | |
2218 | } | |
252b5132 RH |
2219 | break; |
2220 | } | |
2221 | } | |
2222 | } | |
2223 | ||
252b5132 RH |
2224 | /* If this object is the same format as the output object, and it is |
2225 | not a shared library, then let the backend look through the | |
2226 | relocs. | |
2227 | ||
2228 | This is required to build global offset table entries and to | |
2229 | arrange for dynamic relocs. It is not required for the | |
2230 | particular common case of linking non PIC code, even when linking | |
2231 | against shared libraries, but unfortunately there is no way of | |
2232 | knowing whether an object file has been compiled PIC or not. | |
2233 | Looking through the relocs is not particularly time consuming. | |
2234 | The problem is that we must either (1) keep the relocs in memory, | |
2235 | which causes the linker to require additional runtime memory or | |
2236 | (2) read the relocs twice from the input file, which wastes time. | |
2237 | This would be a good case for using mmap. | |
2238 | ||
2239 | I have no idea how to handle linking PIC code into a file of a | |
2240 | different format. It probably can't be done. */ | |
2241 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
2242 | if (! dynamic | |
2243 | && abfd->xvec == info->hash->creator | |
2244 | && check_relocs != NULL) | |
2245 | { | |
2246 | asection *o; | |
2247 | ||
2248 | for (o = abfd->sections; o != NULL; o = o->next) | |
2249 | { | |
2250 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2251 | bfd_boolean ok; |
252b5132 RH |
2252 | |
2253 | if ((o->flags & SEC_RELOC) == 0 | |
2254 | || o->reloc_count == 0 | |
2255 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2256 | && (o->flags & SEC_DEBUGGING) != 0) | |
2257 | || bfd_is_abs_section (o->output_section)) | |
2258 | continue; | |
2259 | ||
2260 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
2261 | (abfd, o, (PTR) NULL, | |
2262 | (Elf_Internal_Rela *) NULL, | |
2263 | info->keep_memory)); | |
2264 | if (internal_relocs == NULL) | |
2265 | goto error_return; | |
2266 | ||
2267 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
2268 | ||
6cdc0ccc | 2269 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2270 | free (internal_relocs); |
2271 | ||
2272 | if (! ok) | |
2273 | goto error_return; | |
2274 | } | |
2275 | } | |
2276 | ||
d6fe2dc1 AM |
2277 | /* If this is a non-traditional link, try to optimize the handling |
2278 | of the .stab/.stabstr sections. */ | |
252b5132 | 2279 | if (! dynamic |
252b5132 RH |
2280 | && ! info->traditional_format |
2281 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
8ea2e4bd | 2282 | && is_elf_hash_table (info) |
252b5132 RH |
2283 | && (info->strip != strip_all && info->strip != strip_debugger)) |
2284 | { | |
2285 | asection *stab, *stabstr; | |
2286 | ||
2287 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
2d653fc7 AM |
2288 | if (stab != NULL |
2289 | && (stab->flags & SEC_MERGE) == 0 | |
2290 | && !bfd_is_abs_section (stab->output_section)) | |
252b5132 RH |
2291 | { |
2292 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
2293 | ||
2294 | if (stabstr != NULL) | |
2295 | { | |
2296 | struct bfd_elf_section_data *secdata; | |
2297 | ||
2298 | secdata = elf_section_data (stab); | |
2299 | if (! _bfd_link_section_stabs (abfd, | |
8ea2e4bd | 2300 | & hash_table->stab_info, |
252b5132 | 2301 | stab, stabstr, |
65765700 | 2302 | &secdata->sec_info)) |
252b5132 | 2303 | goto error_return; |
65765700 | 2304 | if (secdata->sec_info) |
68bfbfcc | 2305 | stab->sec_info_type = ELF_INFO_TYPE_STABS; |
252b5132 RH |
2306 | } |
2307 | } | |
2308 | } | |
2309 | ||
8ea2e4bd NC |
2310 | if (! info->relocateable && ! dynamic |
2311 | && is_elf_hash_table (info)) | |
f5fa8ca2 JJ |
2312 | { |
2313 | asection *s; | |
2314 | ||
2315 | for (s = abfd->sections; s != NULL; s = s->next) | |
2d653fc7 AM |
2316 | if ((s->flags & SEC_MERGE) != 0 |
2317 | && !bfd_is_abs_section (s->output_section)) | |
65765700 JJ |
2318 | { |
2319 | struct bfd_elf_section_data *secdata; | |
2320 | ||
2321 | secdata = elf_section_data (s); | |
2322 | if (! _bfd_merge_section (abfd, | |
2323 | & hash_table->merge_info, | |
2324 | s, &secdata->sec_info)) | |
2325 | goto error_return; | |
2326 | else if (secdata->sec_info) | |
68bfbfcc | 2327 | s->sec_info_type = ELF_INFO_TYPE_MERGE; |
65765700 | 2328 | } |
f5fa8ca2 JJ |
2329 | } |
2330 | ||
f5d44ba0 AM |
2331 | if (is_elf_hash_table (info)) |
2332 | { | |
2333 | /* Add this bfd to the loaded list. */ | |
2334 | struct elf_link_loaded_list *n; | |
2335 | ||
2336 | n = ((struct elf_link_loaded_list *) | |
2337 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list))); | |
2338 | if (n == NULL) | |
2339 | goto error_return; | |
2340 | n->abfd = abfd; | |
2341 | n->next = hash_table->loaded; | |
2342 | hash_table->loaded = n; | |
2343 | } | |
2344 | ||
b34976b6 | 2345 | return TRUE; |
252b5132 | 2346 | |
6cdc0ccc | 2347 | error_free_vers: |
9147e853 JJ |
2348 | if (nondeflt_vers != NULL) |
2349 | free (nondeflt_vers); | |
252b5132 RH |
2350 | if (extversym != NULL) |
2351 | free (extversym); | |
6cdc0ccc AM |
2352 | error_free_sym: |
2353 | if (isymbuf != NULL) | |
2354 | free (isymbuf); | |
2355 | error_return: | |
b34976b6 | 2356 | return FALSE; |
252b5132 RH |
2357 | } |
2358 | ||
2359 | /* Create some sections which will be filled in with dynamic linking | |
2360 | information. ABFD is an input file which requires dynamic sections | |
2361 | to be created. The dynamic sections take up virtual memory space | |
2362 | when the final executable is run, so we need to create them before | |
2363 | addresses are assigned to the output sections. We work out the | |
2364 | actual contents and size of these sections later. */ | |
2365 | ||
b34976b6 | 2366 | bfd_boolean |
252b5132 RH |
2367 | elf_link_create_dynamic_sections (abfd, info) |
2368 | bfd *abfd; | |
2369 | struct bfd_link_info *info; | |
2370 | { | |
2371 | flagword flags; | |
2372 | register asection *s; | |
2373 | struct elf_link_hash_entry *h; | |
14a793b2 | 2374 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
2375 | struct elf_backend_data *bed; |
2376 | ||
8ea2e4bd | 2377 | if (! is_elf_hash_table (info)) |
b34976b6 | 2378 | return FALSE; |
8ea2e4bd | 2379 | |
252b5132 | 2380 | if (elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 2381 | return TRUE; |
252b5132 RH |
2382 | |
2383 | /* Make sure that all dynamic sections use the same input BFD. */ | |
2384 | if (elf_hash_table (info)->dynobj == NULL) | |
2385 | elf_hash_table (info)->dynobj = abfd; | |
2386 | else | |
2387 | abfd = elf_hash_table (info)->dynobj; | |
2388 | ||
2389 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
2390 | sections. */ | |
2391 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
2392 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2393 | ||
2394 | /* A dynamically linked executable has a .interp section, but a | |
2395 | shared library does not. */ | |
2396 | if (! info->shared) | |
2397 | { | |
2398 | s = bfd_make_section (abfd, ".interp"); | |
2399 | if (s == NULL | |
2400 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2401 | return FALSE; |
252b5132 RH |
2402 | } |
2403 | ||
65765700 JJ |
2404 | if (! info->traditional_format |
2405 | && info->hash->creator->flavour == bfd_target_elf_flavour) | |
2406 | { | |
2407 | s = bfd_make_section (abfd, ".eh_frame_hdr"); | |
2408 | if (s == NULL | |
2409 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2410 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
b34976b6 | 2411 | return FALSE; |
126495ed | 2412 | elf_hash_table (info)->eh_info.hdr_sec = s; |
65765700 JJ |
2413 | } |
2414 | ||
252b5132 RH |
2415 | /* Create sections to hold version informations. These are removed |
2416 | if they are not needed. */ | |
2417 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
2418 | if (s == NULL | |
2419 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2420 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2421 | return FALSE; |
252b5132 RH |
2422 | |
2423 | s = bfd_make_section (abfd, ".gnu.version"); | |
2424 | if (s == NULL | |
2425 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2426 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
b34976b6 | 2427 | return FALSE; |
252b5132 RH |
2428 | |
2429 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
2430 | if (s == NULL | |
2431 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2432 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2433 | return FALSE; |
252b5132 RH |
2434 | |
2435 | s = bfd_make_section (abfd, ".dynsym"); | |
2436 | if (s == NULL | |
2437 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2438 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2439 | return FALSE; |
252b5132 RH |
2440 | |
2441 | s = bfd_make_section (abfd, ".dynstr"); | |
2442 | if (s == NULL | |
2443 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2444 | return FALSE; |
252b5132 RH |
2445 | |
2446 | /* Create a strtab to hold the dynamic symbol names. */ | |
2447 | if (elf_hash_table (info)->dynstr == NULL) | |
2448 | { | |
2b0f7ef9 | 2449 | elf_hash_table (info)->dynstr = _bfd_elf_strtab_init (); |
252b5132 | 2450 | if (elf_hash_table (info)->dynstr == NULL) |
b34976b6 | 2451 | return FALSE; |
252b5132 RH |
2452 | } |
2453 | ||
2454 | s = bfd_make_section (abfd, ".dynamic"); | |
2455 | if (s == NULL | |
2456 | || ! bfd_set_section_flags (abfd, s, flags) | |
2457 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2458 | return FALSE; |
252b5132 RH |
2459 | |
2460 | /* The special symbol _DYNAMIC is always set to the start of the | |
2461 | .dynamic section. This call occurs before we have processed the | |
2462 | symbols for any dynamic object, so we don't have to worry about | |
2463 | overriding a dynamic definition. We could set _DYNAMIC in a | |
2464 | linker script, but we only want to define it if we are, in fact, | |
2465 | creating a .dynamic section. We don't want to define it if there | |
2466 | is no .dynamic section, since on some ELF platforms the start up | |
2467 | code examines it to decide how to initialize the process. */ | |
14a793b2 | 2468 | bh = NULL; |
252b5132 RH |
2469 | if (! (_bfd_generic_link_add_one_symbol |
2470 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
b34976b6 AM |
2471 | (const char *) 0, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
2472 | return FALSE; | |
14a793b2 | 2473 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
2474 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
2475 | h->type = STT_OBJECT; | |
2476 | ||
2477 | if (info->shared | |
2478 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2479 | return FALSE; |
252b5132 | 2480 | |
c7ac6ff8 MM |
2481 | bed = get_elf_backend_data (abfd); |
2482 | ||
252b5132 RH |
2483 | s = bfd_make_section (abfd, ".hash"); |
2484 | if (s == NULL | |
2485 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2486 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2487 | return FALSE; |
c7ac6ff8 | 2488 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; |
252b5132 RH |
2489 | |
2490 | /* Let the backend create the rest of the sections. This lets the | |
2491 | backend set the right flags. The backend will normally create | |
2492 | the .got and .plt sections. */ | |
252b5132 | 2493 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) |
b34976b6 | 2494 | return FALSE; |
252b5132 | 2495 | |
b34976b6 | 2496 | elf_hash_table (info)->dynamic_sections_created = TRUE; |
252b5132 | 2497 | |
b34976b6 | 2498 | return TRUE; |
252b5132 RH |
2499 | } |
2500 | ||
2501 | /* Add an entry to the .dynamic table. */ | |
2502 | ||
b34976b6 | 2503 | bfd_boolean |
252b5132 RH |
2504 | elf_add_dynamic_entry (info, tag, val) |
2505 | struct bfd_link_info *info; | |
2506 | bfd_vma tag; | |
2507 | bfd_vma val; | |
2508 | { | |
2509 | Elf_Internal_Dyn dyn; | |
2510 | bfd *dynobj; | |
2511 | asection *s; | |
dc810e39 | 2512 | bfd_size_type newsize; |
252b5132 RH |
2513 | bfd_byte *newcontents; |
2514 | ||
8ea2e4bd | 2515 | if (! is_elf_hash_table (info)) |
b34976b6 | 2516 | return FALSE; |
8ea2e4bd | 2517 | |
252b5132 RH |
2518 | dynobj = elf_hash_table (info)->dynobj; |
2519 | ||
2520 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2521 | BFD_ASSERT (s != NULL); | |
2522 | ||
2523 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
2524 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); | |
2525 | if (newcontents == NULL) | |
b34976b6 | 2526 | return FALSE; |
252b5132 RH |
2527 | |
2528 | dyn.d_tag = tag; | |
2529 | dyn.d_un.d_val = val; | |
2530 | elf_swap_dyn_out (dynobj, &dyn, | |
2531 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
2532 | ||
2533 | s->_raw_size = newsize; | |
2534 | s->contents = newcontents; | |
2535 | ||
b34976b6 | 2536 | return TRUE; |
252b5132 RH |
2537 | } |
2538 | \f | |
6b5bd373 MM |
2539 | /* Read and swap the relocs from the section indicated by SHDR. This |
2540 | may be either a REL or a RELA section. The relocations are | |
2541 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2542 | which should have already been allocated to contain enough space. | |
2543 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2544 | relocations should be stored. | |
2545 | ||
b34976b6 | 2546 | Returns FALSE if something goes wrong. */ |
6b5bd373 | 2547 | |
b34976b6 | 2548 | static bfd_boolean |
6b5bd373 MM |
2549 | elf_link_read_relocs_from_section (abfd, shdr, external_relocs, |
2550 | internal_relocs) | |
2551 | bfd *abfd; | |
2552 | Elf_Internal_Shdr *shdr; | |
2553 | PTR external_relocs; | |
2554 | Elf_Internal_Rela *internal_relocs; | |
2555 | { | |
c7ac6ff8 | 2556 | struct elf_backend_data *bed; |
947216bf AM |
2557 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
2558 | const bfd_byte *erela; | |
2559 | const bfd_byte *erelaend; | |
2560 | Elf_Internal_Rela *irela; | |
c7ac6ff8 | 2561 | |
6b5bd373 MM |
2562 | /* If there aren't any relocations, that's OK. */ |
2563 | if (!shdr) | |
b34976b6 | 2564 | return TRUE; |
6b5bd373 MM |
2565 | |
2566 | /* Position ourselves at the start of the section. */ | |
2567 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
b34976b6 | 2568 | return FALSE; |
6b5bd373 MM |
2569 | |
2570 | /* Read the relocations. */ | |
dc810e39 | 2571 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) |
b34976b6 | 2572 | return FALSE; |
6b5bd373 | 2573 | |
c7ac6ff8 MM |
2574 | bed = get_elf_backend_data (abfd); |
2575 | ||
6b5bd373 MM |
2576 | /* Convert the external relocations to the internal format. */ |
2577 | if (shdr->sh_entsize == sizeof (Elf_External_Rel)) | |
947216bf AM |
2578 | swap_in = bed->s->swap_reloc_in; |
2579 | else if (shdr->sh_entsize == sizeof (Elf_External_Rela)) | |
2580 | swap_in = bed->s->swap_reloca_in; | |
6b5bd373 | 2581 | else |
4fabe71e AM |
2582 | { |
2583 | bfd_set_error (bfd_error_wrong_format); | |
2584 | return FALSE; | |
2585 | } | |
6b5bd373 | 2586 | |
947216bf AM |
2587 | erela = external_relocs; |
2588 | erelaend = erela + NUM_SHDR_ENTRIES (shdr) * shdr->sh_entsize; | |
2589 | irela = internal_relocs; | |
2590 | while (erela < erelaend) | |
2591 | { | |
2592 | (*swap_in) (abfd, erela, irela); | |
2593 | irela += bed->s->int_rels_per_ext_rel; | |
2594 | erela += shdr->sh_entsize; | |
6b5bd373 MM |
2595 | } |
2596 | ||
b34976b6 | 2597 | return TRUE; |
6b5bd373 MM |
2598 | } |
2599 | ||
23bc299b MM |
2600 | /* Read and swap the relocs for a section O. They may have been |
2601 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2602 | not NULL, they are used as buffers to read into. They are known to | |
2603 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2604 | the return value is allocated using either malloc or bfd_alloc, | |
2605 | according to the KEEP_MEMORY argument. If O has two relocation | |
2606 | sections (both REL and RELA relocations), then the REL_HDR | |
2607 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
2608 | REL_HDR2 relocations. */ | |
252b5132 RH |
2609 | |
2610 | Elf_Internal_Rela * | |
2611 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
2612 | keep_memory) | |
2613 | bfd *abfd; | |
2614 | asection *o; | |
2615 | PTR external_relocs; | |
2616 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2617 | bfd_boolean keep_memory; |
252b5132 RH |
2618 | { |
2619 | Elf_Internal_Shdr *rel_hdr; | |
2620 | PTR alloc1 = NULL; | |
2621 | Elf_Internal_Rela *alloc2 = NULL; | |
c7ac6ff8 | 2622 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
2623 | |
2624 | if (elf_section_data (o)->relocs != NULL) | |
2625 | return elf_section_data (o)->relocs; | |
2626 | ||
2627 | if (o->reloc_count == 0) | |
2628 | return NULL; | |
2629 | ||
2630 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
2631 | ||
2632 | if (internal_relocs == NULL) | |
2633 | { | |
dc810e39 | 2634 | bfd_size_type size; |
252b5132 | 2635 | |
dc810e39 AM |
2636 | size = o->reloc_count; |
2637 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
252b5132 RH |
2638 | if (keep_memory) |
2639 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
2640 | else | |
2641 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); | |
2642 | if (internal_relocs == NULL) | |
2643 | goto error_return; | |
2644 | } | |
2645 | ||
2646 | if (external_relocs == NULL) | |
2647 | { | |
dc810e39 | 2648 | bfd_size_type size = rel_hdr->sh_size; |
6b5bd373 MM |
2649 | |
2650 | if (elf_section_data (o)->rel_hdr2) | |
dc810e39 | 2651 | size += elf_section_data (o)->rel_hdr2->sh_size; |
6b5bd373 | 2652 | alloc1 = (PTR) bfd_malloc (size); |
252b5132 RH |
2653 | if (alloc1 == NULL) |
2654 | goto error_return; | |
2655 | external_relocs = alloc1; | |
2656 | } | |
2657 | ||
6b5bd373 MM |
2658 | if (!elf_link_read_relocs_from_section (abfd, rel_hdr, |
2659 | external_relocs, | |
2660 | internal_relocs)) | |
2661 | goto error_return; | |
3e932841 KH |
2662 | if (!elf_link_read_relocs_from_section |
2663 | (abfd, | |
6b5bd373 | 2664 | elf_section_data (o)->rel_hdr2, |
2f5116e2 | 2665 | ((bfd_byte *) external_relocs) + rel_hdr->sh_size, |
d9bc7a44 | 2666 | internal_relocs + (NUM_SHDR_ENTRIES (rel_hdr) |
c7ac6ff8 | 2667 | * bed->s->int_rels_per_ext_rel))) |
252b5132 | 2668 | goto error_return; |
252b5132 RH |
2669 | |
2670 | /* Cache the results for next time, if we can. */ | |
2671 | if (keep_memory) | |
2672 | elf_section_data (o)->relocs = internal_relocs; | |
2673 | ||
2674 | if (alloc1 != NULL) | |
2675 | free (alloc1); | |
2676 | ||
2677 | /* Don't free alloc2, since if it was allocated we are passing it | |
2678 | back (under the name of internal_relocs). */ | |
2679 | ||
2680 | return internal_relocs; | |
2681 | ||
2682 | error_return: | |
2683 | if (alloc1 != NULL) | |
2684 | free (alloc1); | |
2685 | if (alloc2 != NULL) | |
2686 | free (alloc2); | |
2687 | return NULL; | |
2688 | } | |
2689 | \f | |
252b5132 RH |
2690 | /* Record an assignment to a symbol made by a linker script. We need |
2691 | this in case some dynamic object refers to this symbol. */ | |
2692 | ||
b34976b6 | 2693 | bfd_boolean |
252b5132 | 2694 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) |
7442e600 | 2695 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2696 | struct bfd_link_info *info; |
2697 | const char *name; | |
b34976b6 | 2698 | bfd_boolean provide; |
252b5132 RH |
2699 | { |
2700 | struct elf_link_hash_entry *h; | |
2701 | ||
2702 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2703 | return TRUE; |
252b5132 | 2704 | |
b34976b6 | 2705 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, TRUE, FALSE); |
252b5132 | 2706 | if (h == NULL) |
b34976b6 | 2707 | return FALSE; |
252b5132 RH |
2708 | |
2709 | if (h->root.type == bfd_link_hash_new) | |
a7b97311 | 2710 | h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
252b5132 RH |
2711 | |
2712 | /* If this symbol is being provided by the linker script, and it is | |
2713 | currently defined by a dynamic object, but not by a regular | |
2714 | object, then mark it as undefined so that the generic linker will | |
2715 | force the correct value. */ | |
2716 | if (provide | |
2717 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2718 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2719 | h->root.type = bfd_link_hash_undefined; | |
2720 | ||
2721 | /* If this symbol is not being provided by the linker script, and it is | |
2722 | currently defined by a dynamic object, but not by a regular object, | |
2723 | then clear out any version information because the symbol will not be | |
2724 | associated with the dynamic object any more. */ | |
2725 | if (!provide | |
2726 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2727 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2728 | h->verinfo.verdef = NULL; | |
2729 | ||
2730 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
994819d2 | 2731 | |
252b5132 RH |
2732 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
2733 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
2734 | || info->shared) | |
2735 | && h->dynindx == -1) | |
2736 | { | |
2737 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2738 | return FALSE; |
252b5132 RH |
2739 | |
2740 | /* If this is a weak defined symbol, and we know a corresponding | |
2741 | real symbol from the same dynamic object, make sure the real | |
2742 | symbol is also made into a dynamic symbol. */ | |
2743 | if (h->weakdef != NULL | |
2744 | && h->weakdef->dynindx == -1) | |
2745 | { | |
2746 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
b34976b6 | 2747 | return FALSE; |
252b5132 RH |
2748 | } |
2749 | } | |
2750 | ||
b34976b6 | 2751 | return TRUE; |
252b5132 RH |
2752 | } |
2753 | \f | |
2754 | /* This structure is used to pass information to | |
2755 | elf_link_assign_sym_version. */ | |
2756 | ||
2757 | struct elf_assign_sym_version_info | |
2758 | { | |
2759 | /* Output BFD. */ | |
2760 | bfd *output_bfd; | |
2761 | /* General link information. */ | |
2762 | struct bfd_link_info *info; | |
2763 | /* Version tree. */ | |
2764 | struct bfd_elf_version_tree *verdefs; | |
252b5132 | 2765 | /* Whether we had a failure. */ |
b34976b6 | 2766 | bfd_boolean failed; |
252b5132 RH |
2767 | }; |
2768 | ||
2769 | /* This structure is used to pass information to | |
2770 | elf_link_find_version_dependencies. */ | |
2771 | ||
2772 | struct elf_find_verdep_info | |
2773 | { | |
2774 | /* Output BFD. */ | |
2775 | bfd *output_bfd; | |
2776 | /* General link information. */ | |
2777 | struct bfd_link_info *info; | |
2778 | /* The number of dependencies. */ | |
2779 | unsigned int vers; | |
2780 | /* Whether we had a failure. */ | |
b34976b6 | 2781 | bfd_boolean failed; |
252b5132 RH |
2782 | }; |
2783 | ||
2784 | /* Array used to determine the number of hash table buckets to use | |
2785 | based on the number of symbols there are. If there are fewer than | |
2786 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2787 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
2788 | than 32771 buckets. */ | |
2789 | ||
2790 | static const size_t elf_buckets[] = | |
2791 | { | |
2792 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
2793 | 16411, 32771, 0 | |
2794 | }; | |
2795 | ||
2796 | /* Compute bucket count for hashing table. We do not use a static set | |
2797 | of possible tables sizes anymore. Instead we determine for all | |
2798 | possible reasonable sizes of the table the outcome (i.e., the | |
2799 | number of collisions etc) and choose the best solution. The | |
2800 | weighting functions are not too simple to allow the table to grow | |
2801 | without bounds. Instead one of the weighting factors is the size. | |
2802 | Therefore the result is always a good payoff between few collisions | |
2803 | (= short chain lengths) and table size. */ | |
2804 | static size_t | |
2805 | compute_bucket_count (info) | |
2806 | struct bfd_link_info *info; | |
2807 | { | |
2808 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; | |
7442e600 | 2809 | size_t best_size = 0; |
252b5132 RH |
2810 | unsigned long int *hashcodes; |
2811 | unsigned long int *hashcodesp; | |
2812 | unsigned long int i; | |
dc810e39 | 2813 | bfd_size_type amt; |
252b5132 RH |
2814 | |
2815 | /* Compute the hash values for all exported symbols. At the same | |
2816 | time store the values in an array so that we could use them for | |
2817 | optimizations. */ | |
dc810e39 AM |
2818 | amt = dynsymcount; |
2819 | amt *= sizeof (unsigned long int); | |
2820 | hashcodes = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2821 | if (hashcodes == NULL) |
2822 | return 0; | |
2823 | hashcodesp = hashcodes; | |
2824 | ||
2825 | /* Put all hash values in HASHCODES. */ | |
2826 | elf_link_hash_traverse (elf_hash_table (info), | |
2827 | elf_collect_hash_codes, &hashcodesp); | |
2828 | ||
58821868 AM |
2829 | /* We have a problem here. The following code to optimize the table |
2830 | size requires an integer type with more the 32 bits. If | |
2831 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
252b5132 | 2832 | #ifdef BFD_HOST_U_64_BIT |
82e51918 | 2833 | if (info->optimize) |
252b5132 RH |
2834 | { |
2835 | unsigned long int nsyms = hashcodesp - hashcodes; | |
2836 | size_t minsize; | |
2837 | size_t maxsize; | |
2838 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
2839 | unsigned long int *counts ; | |
2840 | ||
2841 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
2842 | that the hashing table must at least have NSYMS/4 and at most | |
2843 | 2*NSYMS buckets. */ | |
2844 | minsize = nsyms / 4; | |
2845 | if (minsize == 0) | |
2846 | minsize = 1; | |
2847 | best_size = maxsize = nsyms * 2; | |
2848 | ||
2849 | /* Create array where we count the collisions in. We must use bfd_malloc | |
2850 | since the size could be large. */ | |
dc810e39 AM |
2851 | amt = maxsize; |
2852 | amt *= sizeof (unsigned long int); | |
2853 | counts = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2854 | if (counts == NULL) |
2855 | { | |
2856 | free (hashcodes); | |
2857 | return 0; | |
2858 | } | |
2859 | ||
2860 | /* Compute the "optimal" size for the hash table. The criteria is a | |
2861 | minimal chain length. The minor criteria is (of course) the size | |
2862 | of the table. */ | |
2863 | for (i = minsize; i < maxsize; ++i) | |
2864 | { | |
2865 | /* Walk through the array of hashcodes and count the collisions. */ | |
2866 | BFD_HOST_U_64_BIT max; | |
2867 | unsigned long int j; | |
2868 | unsigned long int fact; | |
2869 | ||
2870 | memset (counts, '\0', i * sizeof (unsigned long int)); | |
2871 | ||
2872 | /* Determine how often each hash bucket is used. */ | |
2873 | for (j = 0; j < nsyms; ++j) | |
2874 | ++counts[hashcodes[j] % i]; | |
2875 | ||
2876 | /* For the weight function we need some information about the | |
2877 | pagesize on the target. This is information need not be 100% | |
2878 | accurate. Since this information is not available (so far) we | |
2879 | define it here to a reasonable default value. If it is crucial | |
2880 | to have a better value some day simply define this value. */ | |
2881 | # ifndef BFD_TARGET_PAGESIZE | |
2882 | # define BFD_TARGET_PAGESIZE (4096) | |
2883 | # endif | |
2884 | ||
2885 | /* We in any case need 2 + NSYMS entries for the size values and | |
2886 | the chains. */ | |
2887 | max = (2 + nsyms) * (ARCH_SIZE / 8); | |
2888 | ||
2889 | # if 1 | |
2890 | /* Variant 1: optimize for short chains. We add the squares | |
2891 | of all the chain lengths (which favous many small chain | |
2892 | over a few long chains). */ | |
2893 | for (j = 0; j < i; ++j) | |
2894 | max += counts[j] * counts[j]; | |
2895 | ||
2896 | /* This adds penalties for the overall size of the table. */ | |
2897 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2898 | max *= fact * fact; | |
2899 | # else | |
2900 | /* Variant 2: Optimize a lot more for small table. Here we | |
2901 | also add squares of the size but we also add penalties for | |
2902 | empty slots (the +1 term). */ | |
2903 | for (j = 0; j < i; ++j) | |
2904 | max += (1 + counts[j]) * (1 + counts[j]); | |
2905 | ||
2906 | /* The overall size of the table is considered, but not as | |
2907 | strong as in variant 1, where it is squared. */ | |
2908 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2909 | max *= fact; | |
2910 | # endif | |
2911 | ||
2912 | /* Compare with current best results. */ | |
2913 | if (max < best_chlen) | |
2914 | { | |
2915 | best_chlen = max; | |
2916 | best_size = i; | |
2917 | } | |
2918 | } | |
2919 | ||
2920 | free (counts); | |
2921 | } | |
2922 | else | |
2923 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
2924 | { | |
2925 | /* This is the fallback solution if no 64bit type is available or if we | |
2926 | are not supposed to spend much time on optimizations. We select the | |
2927 | bucket count using a fixed set of numbers. */ | |
2928 | for (i = 0; elf_buckets[i] != 0; i++) | |
2929 | { | |
2930 | best_size = elf_buckets[i]; | |
2931 | if (dynsymcount < elf_buckets[i + 1]) | |
2932 | break; | |
2933 | } | |
2934 | } | |
2935 | ||
2936 | /* Free the arrays we needed. */ | |
2937 | free (hashcodes); | |
2938 | ||
2939 | return best_size; | |
2940 | } | |
2941 | ||
2942 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2943 | called by the ELF linker emulation before_allocation routine. We | |
2944 | must set the sizes of the sections before the linker sets the | |
2945 | addresses of the various sections. */ | |
2946 | ||
b34976b6 | 2947 | bfd_boolean |
252b5132 | 2948 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, |
99293407 | 2949 | filter_shlib, |
252b5132 RH |
2950 | auxiliary_filters, info, sinterpptr, |
2951 | verdefs) | |
2952 | bfd *output_bfd; | |
2953 | const char *soname; | |
2954 | const char *rpath; | |
252b5132 RH |
2955 | const char *filter_shlib; |
2956 | const char * const *auxiliary_filters; | |
2957 | struct bfd_link_info *info; | |
2958 | asection **sinterpptr; | |
2959 | struct bfd_elf_version_tree *verdefs; | |
2960 | { | |
2961 | bfd_size_type soname_indx; | |
25e27870 | 2962 | bfd *dynobj; |
252b5132 | 2963 | struct elf_backend_data *bed; |
252b5132 RH |
2964 | struct elf_assign_sym_version_info asvinfo; |
2965 | ||
2966 | *sinterpptr = NULL; | |
2967 | ||
2968 | soname_indx = (bfd_size_type) -1; | |
2969 | ||
2970 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2971 | return TRUE; |
252b5132 | 2972 | |
8ea2e4bd | 2973 | if (! is_elf_hash_table (info)) |
b34976b6 | 2974 | return TRUE; |
8ea2e4bd | 2975 | |
51b64d56 AM |
2976 | /* Any syms created from now on start with -1 in |
2977 | got.refcount/offset and plt.refcount/offset. */ | |
5cab59f6 | 2978 | elf_hash_table (info)->init_refcount = elf_hash_table (info)->init_offset; |
51b64d56 | 2979 | |
252b5132 RH |
2980 | /* The backend may have to create some sections regardless of whether |
2981 | we're dynamic or not. */ | |
2982 | bed = get_elf_backend_data (output_bfd); | |
2983 | if (bed->elf_backend_always_size_sections | |
2984 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
b34976b6 | 2985 | return FALSE; |
252b5132 RH |
2986 | |
2987 | dynobj = elf_hash_table (info)->dynobj; | |
2988 | ||
2989 | /* If there were no dynamic objects in the link, there is nothing to | |
2990 | do here. */ | |
2991 | if (dynobj == NULL) | |
b34976b6 | 2992 | return TRUE; |
252b5132 | 2993 | |
68f69152 | 2994 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
b34976b6 | 2995 | return FALSE; |
68f69152 | 2996 | |
252b5132 RH |
2997 | if (elf_hash_table (info)->dynamic_sections_created) |
2998 | { | |
2999 | struct elf_info_failed eif; | |
3000 | struct elf_link_hash_entry *h; | |
fc8c40a0 | 3001 | asection *dynstr; |
31941635 L |
3002 | struct bfd_elf_version_tree *t; |
3003 | struct bfd_elf_version_expr *d; | |
b34976b6 | 3004 | bfd_boolean all_defined; |
252b5132 RH |
3005 | |
3006 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
3007 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
3008 | ||
3009 | if (soname != NULL) | |
3010 | { | |
2b0f7ef9 | 3011 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3012 | soname, TRUE); |
252b5132 | 3013 | if (soname_indx == (bfd_size_type) -1 |
dc810e39 AM |
3014 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SONAME, |
3015 | soname_indx)) | |
b34976b6 | 3016 | return FALSE; |
252b5132 RH |
3017 | } |
3018 | ||
3019 | if (info->symbolic) | |
3020 | { | |
dc810e39 AM |
3021 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMBOLIC, |
3022 | (bfd_vma) 0)) | |
b34976b6 | 3023 | return FALSE; |
d6cf2879 | 3024 | info->flags |= DF_SYMBOLIC; |
252b5132 RH |
3025 | } |
3026 | ||
3027 | if (rpath != NULL) | |
3028 | { | |
3029 | bfd_size_type indx; | |
3030 | ||
2b0f7ef9 | 3031 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, |
b34976b6 | 3032 | TRUE); |
2b0f7ef9 JJ |
3033 | if (info->new_dtags) |
3034 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
252b5132 | 3035 | if (indx == (bfd_size_type) -1 |
dc810e39 | 3036 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_RPATH, indx) |
c25373b7 | 3037 | || (info->new_dtags |
dc810e39 AM |
3038 | && ! elf_add_dynamic_entry (info, (bfd_vma) DT_RUNPATH, |
3039 | indx))) | |
b34976b6 | 3040 | return FALSE; |
252b5132 RH |
3041 | } |
3042 | ||
3043 | if (filter_shlib != NULL) | |
3044 | { | |
3045 | bfd_size_type indx; | |
3046 | ||
2b0f7ef9 | 3047 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3048 | filter_shlib, TRUE); |
252b5132 | 3049 | if (indx == (bfd_size_type) -1 |
dc810e39 | 3050 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_FILTER, indx)) |
b34976b6 | 3051 | return FALSE; |
252b5132 RH |
3052 | } |
3053 | ||
3054 | if (auxiliary_filters != NULL) | |
3055 | { | |
3056 | const char * const *p; | |
3057 | ||
3058 | for (p = auxiliary_filters; *p != NULL; p++) | |
3059 | { | |
3060 | bfd_size_type indx; | |
3061 | ||
2b0f7ef9 | 3062 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3063 | *p, TRUE); |
252b5132 | 3064 | if (indx == (bfd_size_type) -1 |
dc810e39 AM |
3065 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_AUXILIARY, |
3066 | indx)) | |
b34976b6 | 3067 | return FALSE; |
252b5132 RH |
3068 | } |
3069 | } | |
3070 | ||
391a809a | 3071 | eif.info = info; |
bc2b6df7 | 3072 | eif.verdefs = verdefs; |
b34976b6 | 3073 | eif.failed = FALSE; |
391a809a | 3074 | |
ea44b734 | 3075 | /* If we are supposed to export all symbols into the dynamic symbol |
c44233aa | 3076 | table (this is not the normal case), then do so. */ |
99293407 | 3077 | if (info->export_dynamic) |
ea44b734 | 3078 | { |
ea44b734 | 3079 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, |
c44233aa | 3080 | (PTR) &eif); |
ea44b734 | 3081 | if (eif.failed) |
b34976b6 | 3082 | return FALSE; |
ea44b734 RH |
3083 | } |
3084 | ||
31941635 L |
3085 | /* Make all global versions with definiton. */ |
3086 | for (t = verdefs; t != NULL; t = t->next) | |
3087 | for (d = t->globals; d != NULL; d = d->next) | |
3088 | if (!d->symver && strchr (d->pattern, '*') == NULL) | |
3089 | { | |
3090 | const char *verstr, *name; | |
3091 | size_t namelen, verlen, newlen; | |
3092 | char *newname, *p; | |
3093 | struct elf_link_hash_entry *newh; | |
3094 | ||
3095 | name = d->pattern; | |
3096 | namelen = strlen (name); | |
3097 | verstr = t->name; | |
3098 | verlen = strlen (verstr); | |
b34976b6 | 3099 | newlen = namelen + verlen + 3; |
31941635 L |
3100 | |
3101 | newname = (char *) bfd_malloc ((bfd_size_type) newlen); | |
3102 | if (newname == NULL) | |
b34976b6 | 3103 | return FALSE; |
31941635 L |
3104 | memcpy (newname, name, namelen); |
3105 | ||
3106 | /* Check the hidden versioned definition. */ | |
3107 | p = newname + namelen; | |
3108 | *p++ = ELF_VER_CHR; | |
3109 | memcpy (p, verstr, verlen + 1); | |
3110 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3111 | newname, FALSE, FALSE, |
3112 | FALSE); | |
31941635 L |
3113 | if (newh == NULL |
3114 | || (newh->root.type != bfd_link_hash_defined | |
3115 | && newh->root.type != bfd_link_hash_defweak)) | |
3116 | { | |
3117 | /* Check the default versioned definition. */ | |
3118 | *p++ = ELF_VER_CHR; | |
3119 | memcpy (p, verstr, verlen + 1); | |
3120 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3121 | newname, FALSE, FALSE, |
3122 | FALSE); | |
31941635 L |
3123 | } |
3124 | free (newname); | |
3125 | ||
c828c771 L |
3126 | /* Mark this version if there is a definition and it is |
3127 | not defined in a shared object. */ | |
31941635 | 3128 | if (newh != NULL |
c828c771 L |
3129 | && ((newh->elf_link_hash_flags |
3130 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0) | |
31941635 L |
3131 | && (newh->root.type == bfd_link_hash_defined |
3132 | || newh->root.type == bfd_link_hash_defweak)) | |
3133 | d->symver = 1; | |
3134 | } | |
3135 | ||
252b5132 RH |
3136 | /* Attach all the symbols to their version information. */ |
3137 | asvinfo.output_bfd = output_bfd; | |
3138 | asvinfo.info = info; | |
3139 | asvinfo.verdefs = verdefs; | |
b34976b6 | 3140 | asvinfo.failed = FALSE; |
252b5132 RH |
3141 | |
3142 | elf_link_hash_traverse (elf_hash_table (info), | |
3143 | elf_link_assign_sym_version, | |
3144 | (PTR) &asvinfo); | |
3145 | if (asvinfo.failed) | |
b34976b6 | 3146 | return FALSE; |
252b5132 | 3147 | |
31941635 L |
3148 | if (!info->allow_undefined_version) |
3149 | { | |
3150 | /* Check if all global versions have a definiton. */ | |
b34976b6 | 3151 | all_defined = TRUE; |
31941635 L |
3152 | for (t = verdefs; t != NULL; t = t->next) |
3153 | for (d = t->globals; d != NULL; d = d->next) | |
3154 | if (!d->symver && !d->script | |
3155 | && strchr (d->pattern, '*') == NULL) | |
3156 | { | |
3157 | (*_bfd_error_handler) | |
3158 | (_("%s: undefined version: %s"), | |
3159 | d->pattern, t->name); | |
b34976b6 | 3160 | all_defined = FALSE; |
31941635 L |
3161 | } |
3162 | ||
3163 | if (!all_defined) | |
3164 | { | |
3165 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3166 | return FALSE; |
31941635 L |
3167 | } |
3168 | } | |
3169 | ||
252b5132 RH |
3170 | /* Find all symbols which were defined in a dynamic object and make |
3171 | the backend pick a reasonable value for them. */ | |
252b5132 RH |
3172 | elf_link_hash_traverse (elf_hash_table (info), |
3173 | elf_adjust_dynamic_symbol, | |
3174 | (PTR) &eif); | |
3175 | if (eif.failed) | |
b34976b6 | 3176 | return FALSE; |
252b5132 RH |
3177 | |
3178 | /* Add some entries to the .dynamic section. We fill in some of the | |
3179 | values later, in elf_bfd_final_link, but we must add the entries | |
3180 | now so that we know the final size of the .dynamic section. */ | |
f0c2e336 MM |
3181 | |
3182 | /* If there are initialization and/or finalization functions to | |
3183 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
3184 | h = (info->init_function | |
3e932841 | 3185 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3186 | info->init_function, FALSE, |
3187 | FALSE, FALSE) | |
f0c2e336 | 3188 | : NULL); |
252b5132 RH |
3189 | if (h != NULL |
3190 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3191 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3192 | { | |
dc810e39 | 3193 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_INIT, (bfd_vma) 0)) |
b34976b6 | 3194 | return FALSE; |
252b5132 | 3195 | } |
f0c2e336 | 3196 | h = (info->fini_function |
3e932841 | 3197 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3198 | info->fini_function, FALSE, |
3199 | FALSE, FALSE) | |
f0c2e336 | 3200 | : NULL); |
252b5132 RH |
3201 | if (h != NULL |
3202 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3203 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3204 | { | |
dc810e39 | 3205 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FINI, (bfd_vma) 0)) |
b34976b6 | 3206 | return FALSE; |
252b5132 | 3207 | } |
f0c2e336 | 3208 | |
fa7ea4d8 AM |
3209 | if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL) |
3210 | { | |
3211 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
3212 | if (info->shared) | |
3213 | { | |
3214 | bfd *sub; | |
3215 | asection *o; | |
3216 | ||
3217 | for (sub = info->input_bfds; sub != NULL; | |
3218 | sub = sub->link_next) | |
3219 | for (o = sub->sections; o != NULL; o = o->next) | |
3220 | if (elf_section_data (o)->this_hdr.sh_type | |
3221 | == SHT_PREINIT_ARRAY) | |
3222 | { | |
3223 | (*_bfd_error_handler) | |
3224 | (_("%s: .preinit_array section is not allowed in DSO"), | |
58821868 | 3225 | bfd_archive_filename (sub)); |
fa7ea4d8 AM |
3226 | break; |
3227 | } | |
60166579 | 3228 | |
36b4f6e7 | 3229 | bfd_set_error (bfd_error_nonrepresentable_section); |
b34976b6 | 3230 | return FALSE; |
fa7ea4d8 AM |
3231 | } |
3232 | ||
3233 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAY, | |
3234 | (bfd_vma) 0) | |
3235 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAYSZ, | |
3236 | (bfd_vma) 0)) | |
b34976b6 | 3237 | return FALSE; |
fa7ea4d8 AM |
3238 | } |
3239 | if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL) | |
3240 | { | |
3241 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAY, | |
3242 | (bfd_vma) 0) | |
3243 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAYSZ, | |
3244 | (bfd_vma) 0)) | |
b34976b6 | 3245 | return FALSE; |
fa7ea4d8 AM |
3246 | } |
3247 | if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL) | |
3248 | { | |
3249 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAY, | |
3250 | (bfd_vma) 0) | |
3251 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAYSZ, | |
3252 | (bfd_vma) 0)) | |
b34976b6 | 3253 | return FALSE; |
fa7ea4d8 | 3254 | } |
30831527 | 3255 | |
fc8c40a0 AM |
3256 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); |
3257 | /* If .dynstr is excluded from the link, we don't want any of | |
3258 | these tags. Strictly, we should be checking each section | |
3259 | individually; This quick check covers for the case where | |
3260 | someone does a /DISCARD/ : { *(*) }. */ | |
3261 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
3262 | { | |
3263 | bfd_size_type strsize; | |
3264 | ||
2b0f7ef9 | 3265 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
dc810e39 AM |
3266 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_HASH, (bfd_vma) 0) |
3267 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRTAB, (bfd_vma) 0) | |
3268 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMTAB, (bfd_vma) 0) | |
3269 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRSZ, strsize) | |
3270 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMENT, | |
3271 | (bfd_vma) sizeof (Elf_External_Sym))) | |
b34976b6 | 3272 | return FALSE; |
fc8c40a0 | 3273 | } |
252b5132 RH |
3274 | } |
3275 | ||
3276 | /* The backend must work out the sizes of all the other dynamic | |
3277 | sections. */ | |
252b5132 RH |
3278 | if (bed->elf_backend_size_dynamic_sections |
3279 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
b34976b6 | 3280 | return FALSE; |
252b5132 RH |
3281 | |
3282 | if (elf_hash_table (info)->dynamic_sections_created) | |
3283 | { | |
dc810e39 | 3284 | bfd_size_type dynsymcount; |
252b5132 RH |
3285 | asection *s; |
3286 | size_t bucketcount = 0; | |
c7ac6ff8 | 3287 | size_t hash_entry_size; |
db6751f2 | 3288 | unsigned int dtagcount; |
252b5132 RH |
3289 | |
3290 | /* Set up the version definition section. */ | |
3291 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
3292 | BFD_ASSERT (s != NULL); | |
3293 | ||
3294 | /* We may have created additional version definitions if we are | |
c44233aa | 3295 | just linking a regular application. */ |
252b5132 RH |
3296 | verdefs = asvinfo.verdefs; |
3297 | ||
6b9b879a JJ |
3298 | /* Skip anonymous version tag. */ |
3299 | if (verdefs != NULL && verdefs->vernum == 0) | |
3300 | verdefs = verdefs->next; | |
3301 | ||
252b5132 | 3302 | if (verdefs == NULL) |
7f8d5fc9 | 3303 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3304 | else |
3305 | { | |
3306 | unsigned int cdefs; | |
3307 | bfd_size_type size; | |
3308 | struct bfd_elf_version_tree *t; | |
3309 | bfd_byte *p; | |
3310 | Elf_Internal_Verdef def; | |
3311 | Elf_Internal_Verdaux defaux; | |
3312 | ||
252b5132 RH |
3313 | cdefs = 0; |
3314 | size = 0; | |
3315 | ||
3316 | /* Make space for the base version. */ | |
3317 | size += sizeof (Elf_External_Verdef); | |
3318 | size += sizeof (Elf_External_Verdaux); | |
3319 | ++cdefs; | |
3320 | ||
3321 | for (t = verdefs; t != NULL; t = t->next) | |
3322 | { | |
3323 | struct bfd_elf_version_deps *n; | |
3324 | ||
3325 | size += sizeof (Elf_External_Verdef); | |
3326 | size += sizeof (Elf_External_Verdaux); | |
3327 | ++cdefs; | |
3328 | ||
3329 | for (n = t->deps; n != NULL; n = n->next) | |
3330 | size += sizeof (Elf_External_Verdaux); | |
3331 | } | |
3332 | ||
3333 | s->_raw_size = size; | |
3334 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3335 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3336 | return FALSE; |
252b5132 RH |
3337 | |
3338 | /* Fill in the version definition section. */ | |
3339 | ||
3340 | p = s->contents; | |
3341 | ||
3342 | def.vd_version = VER_DEF_CURRENT; | |
3343 | def.vd_flags = VER_FLG_BASE; | |
3344 | def.vd_ndx = 1; | |
3345 | def.vd_cnt = 1; | |
3346 | def.vd_aux = sizeof (Elf_External_Verdef); | |
3347 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3348 | + sizeof (Elf_External_Verdaux)); | |
3349 | ||
3350 | if (soname_indx != (bfd_size_type) -1) | |
3351 | { | |
2b0f7ef9 JJ |
3352 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3353 | soname_indx); | |
3a99b017 | 3354 | def.vd_hash = bfd_elf_hash (soname); |
252b5132 RH |
3355 | defaux.vda_name = soname_indx; |
3356 | } | |
3357 | else | |
3358 | { | |
3359 | const char *name; | |
3360 | bfd_size_type indx; | |
3361 | ||
96fd004e | 3362 | name = basename (output_bfd->filename); |
3a99b017 | 3363 | def.vd_hash = bfd_elf_hash (name); |
2b0f7ef9 | 3364 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3365 | name, FALSE); |
252b5132 | 3366 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3367 | return FALSE; |
252b5132 RH |
3368 | defaux.vda_name = indx; |
3369 | } | |
3370 | defaux.vda_next = 0; | |
3371 | ||
3372 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
a7b97311 | 3373 | (Elf_External_Verdef *) p); |
252b5132 RH |
3374 | p += sizeof (Elf_External_Verdef); |
3375 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3376 | (Elf_External_Verdaux *) p); | |
3377 | p += sizeof (Elf_External_Verdaux); | |
3378 | ||
3379 | for (t = verdefs; t != NULL; t = t->next) | |
3380 | { | |
3381 | unsigned int cdeps; | |
3382 | struct bfd_elf_version_deps *n; | |
3383 | struct elf_link_hash_entry *h; | |
14a793b2 | 3384 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
3385 | |
3386 | cdeps = 0; | |
3387 | for (n = t->deps; n != NULL; n = n->next) | |
3388 | ++cdeps; | |
3389 | ||
3390 | /* Add a symbol representing this version. */ | |
14a793b2 | 3391 | bh = NULL; |
252b5132 RH |
3392 | if (! (_bfd_generic_link_add_one_symbol |
3393 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
b34976b6 | 3394 | (bfd_vma) 0, (const char *) NULL, FALSE, |
14a793b2 | 3395 | get_elf_backend_data (dynobj)->collect, &bh))) |
b34976b6 | 3396 | return FALSE; |
14a793b2 | 3397 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
3398 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; |
3399 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3400 | h->type = STT_OBJECT; | |
3401 | h->verinfo.vertree = t; | |
3402 | ||
3403 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 3404 | return FALSE; |
252b5132 RH |
3405 | |
3406 | def.vd_version = VER_DEF_CURRENT; | |
3407 | def.vd_flags = 0; | |
3408 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
3409 | def.vd_flags |= VER_FLG_WEAK; | |
3410 | def.vd_ndx = t->vernum + 1; | |
3411 | def.vd_cnt = cdeps + 1; | |
3a99b017 | 3412 | def.vd_hash = bfd_elf_hash (t->name); |
252b5132 RH |
3413 | def.vd_aux = sizeof (Elf_External_Verdef); |
3414 | if (t->next != NULL) | |
3415 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3416 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
3417 | else | |
3418 | def.vd_next = 0; | |
3419 | ||
3420 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
3421 | (Elf_External_Verdef *) p); | |
3422 | p += sizeof (Elf_External_Verdef); | |
3423 | ||
3424 | defaux.vda_name = h->dynstr_index; | |
2b0f7ef9 JJ |
3425 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3426 | h->dynstr_index); | |
252b5132 RH |
3427 | if (t->deps == NULL) |
3428 | defaux.vda_next = 0; | |
3429 | else | |
3430 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3431 | t->name_indx = defaux.vda_name; | |
3432 | ||
3433 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3434 | (Elf_External_Verdaux *) p); | |
3435 | p += sizeof (Elf_External_Verdaux); | |
3436 | ||
3437 | for (n = t->deps; n != NULL; n = n->next) | |
3438 | { | |
3439 | if (n->version_needed == NULL) | |
3440 | { | |
3441 | /* This can happen if there was an error in the | |
3442 | version script. */ | |
3443 | defaux.vda_name = 0; | |
3444 | } | |
3445 | else | |
2b0f7ef9 JJ |
3446 | { |
3447 | defaux.vda_name = n->version_needed->name_indx; | |
3448 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
3449 | defaux.vda_name); | |
3450 | } | |
252b5132 RH |
3451 | if (n->next == NULL) |
3452 | defaux.vda_next = 0; | |
3453 | else | |
3454 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3455 | ||
3456 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3457 | (Elf_External_Verdaux *) p); | |
3458 | p += sizeof (Elf_External_Verdaux); | |
3459 | } | |
3460 | } | |
3461 | ||
dc810e39 AM |
3462 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEF, (bfd_vma) 0) |
3463 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEFNUM, | |
3464 | (bfd_vma) cdefs)) | |
b34976b6 | 3465 | return FALSE; |
252b5132 RH |
3466 | |
3467 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
3468 | } | |
3469 | ||
13ae64f3 | 3470 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) |
d6cf2879 | 3471 | { |
dc810e39 | 3472 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS, info->flags)) |
b34976b6 | 3473 | return FALSE; |
d6cf2879 L |
3474 | } |
3475 | ||
4d538889 | 3476 | if (info->flags_1) |
d6cf2879 L |
3477 | { |
3478 | if (! info->shared) | |
3479 | info->flags_1 &= ~ (DF_1_INITFIRST | |
3480 | | DF_1_NODELETE | |
3481 | | DF_1_NOOPEN); | |
dc810e39 AM |
3482 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS_1, |
3483 | info->flags_1)) | |
b34976b6 | 3484 | return FALSE; |
d6cf2879 L |
3485 | } |
3486 | ||
252b5132 RH |
3487 | /* Work out the size of the version reference section. */ |
3488 | ||
3489 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
3490 | BFD_ASSERT (s != NULL); | |
3491 | { | |
3492 | struct elf_find_verdep_info sinfo; | |
3493 | ||
3494 | sinfo.output_bfd = output_bfd; | |
3495 | sinfo.info = info; | |
3496 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
3497 | if (sinfo.vers == 0) | |
3498 | sinfo.vers = 1; | |
b34976b6 | 3499 | sinfo.failed = FALSE; |
252b5132 RH |
3500 | |
3501 | elf_link_hash_traverse (elf_hash_table (info), | |
3502 | elf_link_find_version_dependencies, | |
3503 | (PTR) &sinfo); | |
3504 | ||
3505 | if (elf_tdata (output_bfd)->verref == NULL) | |
7f8d5fc9 | 3506 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3507 | else |
3508 | { | |
3509 | Elf_Internal_Verneed *t; | |
3510 | unsigned int size; | |
3511 | unsigned int crefs; | |
3512 | bfd_byte *p; | |
3513 | ||
3514 | /* Build the version definition section. */ | |
3515 | size = 0; | |
3516 | crefs = 0; | |
3517 | for (t = elf_tdata (output_bfd)->verref; | |
3518 | t != NULL; | |
3519 | t = t->vn_nextref) | |
3520 | { | |
3521 | Elf_Internal_Vernaux *a; | |
3522 | ||
3523 | size += sizeof (Elf_External_Verneed); | |
3524 | ++crefs; | |
3525 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3526 | size += sizeof (Elf_External_Vernaux); | |
3527 | } | |
3528 | ||
3529 | s->_raw_size = size; | |
dc810e39 | 3530 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); |
252b5132 | 3531 | if (s->contents == NULL) |
b34976b6 | 3532 | return FALSE; |
252b5132 RH |
3533 | |
3534 | p = s->contents; | |
3535 | for (t = elf_tdata (output_bfd)->verref; | |
3536 | t != NULL; | |
3537 | t = t->vn_nextref) | |
3538 | { | |
3539 | unsigned int caux; | |
3540 | Elf_Internal_Vernaux *a; | |
3541 | bfd_size_type indx; | |
3542 | ||
3543 | caux = 0; | |
3544 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3545 | ++caux; | |
3546 | ||
3547 | t->vn_version = VER_NEED_CURRENT; | |
3548 | t->vn_cnt = caux; | |
2b0f7ef9 JJ |
3549 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3550 | elf_dt_name (t->vn_bfd) != NULL | |
3551 | ? elf_dt_name (t->vn_bfd) | |
3552 | : basename (t->vn_bfd->filename), | |
b34976b6 | 3553 | FALSE); |
252b5132 | 3554 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3555 | return FALSE; |
252b5132 RH |
3556 | t->vn_file = indx; |
3557 | t->vn_aux = sizeof (Elf_External_Verneed); | |
3558 | if (t->vn_nextref == NULL) | |
3559 | t->vn_next = 0; | |
3560 | else | |
3561 | t->vn_next = (sizeof (Elf_External_Verneed) | |
3562 | + caux * sizeof (Elf_External_Vernaux)); | |
3563 | ||
3564 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
3565 | (Elf_External_Verneed *) p); | |
3566 | p += sizeof (Elf_External_Verneed); | |
3567 | ||
3568 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3569 | { | |
3a99b017 | 3570 | a->vna_hash = bfd_elf_hash (a->vna_nodename); |
2b0f7ef9 | 3571 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3572 | a->vna_nodename, FALSE); |
252b5132 | 3573 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3574 | return FALSE; |
252b5132 RH |
3575 | a->vna_name = indx; |
3576 | if (a->vna_nextptr == NULL) | |
3577 | a->vna_next = 0; | |
3578 | else | |
3579 | a->vna_next = sizeof (Elf_External_Vernaux); | |
3580 | ||
3581 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
3582 | (Elf_External_Vernaux *) p); | |
3583 | p += sizeof (Elf_External_Vernaux); | |
3584 | } | |
3585 | } | |
3586 | ||
dc810e39 AM |
3587 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEED, |
3588 | (bfd_vma) 0) | |
3589 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEEDNUM, | |
3590 | (bfd_vma) crefs)) | |
b34976b6 | 3591 | return FALSE; |
252b5132 RH |
3592 | |
3593 | elf_tdata (output_bfd)->cverrefs = crefs; | |
3594 | } | |
3595 | } | |
3596 | ||
3e932841 | 3597 | /* Assign dynsym indicies. In a shared library we generate a |
30b30c21 RH |
3598 | section symbol for each output section, which come first. |
3599 | Next come all of the back-end allocated local dynamic syms, | |
3600 | followed by the rest of the global symbols. */ | |
3601 | ||
3602 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); | |
252b5132 RH |
3603 | |
3604 | /* Work out the size of the symbol version section. */ | |
3605 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
3606 | BFD_ASSERT (s != NULL); | |
3607 | if (dynsymcount == 0 | |
3608 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
3609 | { | |
7f8d5fc9 | 3610 | _bfd_strip_section_from_output (info, s); |
42751cf3 MM |
3611 | /* The DYNSYMCOUNT might have changed if we were going to |
3612 | output a dynamic symbol table entry for S. */ | |
30b30c21 | 3613 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); |
252b5132 RH |
3614 | } |
3615 | else | |
3616 | { | |
3617 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); | |
3618 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); | |
3619 | if (s->contents == NULL) | |
b34976b6 | 3620 | return FALSE; |
252b5132 | 3621 | |
dc810e39 | 3622 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERSYM, (bfd_vma) 0)) |
b34976b6 | 3623 | return FALSE; |
252b5132 RH |
3624 | } |
3625 | ||
3626 | /* Set the size of the .dynsym and .hash sections. We counted | |
3627 | the number of dynamic symbols in elf_link_add_object_symbols. | |
3628 | We will build the contents of .dynsym and .hash when we build | |
3629 | the final symbol table, because until then we do not know the | |
3630 | correct value to give the symbols. We built the .dynstr | |
3631 | section as we went along in elf_link_add_object_symbols. */ | |
3632 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3633 | BFD_ASSERT (s != NULL); | |
3634 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
3635 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3636 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3637 | return FALSE; |
252b5132 | 3638 | |
fc8c40a0 AM |
3639 | if (dynsymcount != 0) |
3640 | { | |
3641 | Elf_Internal_Sym isym; | |
3642 | ||
3643 | /* The first entry in .dynsym is a dummy symbol. */ | |
3644 | isym.st_value = 0; | |
3645 | isym.st_size = 0; | |
3646 | isym.st_name = 0; | |
3647 | isym.st_info = 0; | |
3648 | isym.st_other = 0; | |
3649 | isym.st_shndx = 0; | |
9ad5cbcf | 3650 | elf_swap_symbol_out (output_bfd, &isym, (PTR) s->contents, (PTR) 0); |
fc8c40a0 | 3651 | } |
252b5132 RH |
3652 | |
3653 | /* Compute the size of the hashing table. As a side effect this | |
3654 | computes the hash values for all the names we export. */ | |
3655 | bucketcount = compute_bucket_count (info); | |
3656 | ||
3657 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
3658 | BFD_ASSERT (s != NULL); | |
c7ac6ff8 MM |
3659 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; |
3660 | s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
1126897b | 3661 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
252b5132 | 3662 | if (s->contents == NULL) |
b34976b6 | 3663 | return FALSE; |
252b5132 | 3664 | |
dc810e39 AM |
3665 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) bucketcount, |
3666 | s->contents); | |
3667 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) dynsymcount, | |
c7ac6ff8 | 3668 | s->contents + hash_entry_size); |
252b5132 RH |
3669 | |
3670 | elf_hash_table (info)->bucketcount = bucketcount; | |
3671 | ||
3672 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
3673 | BFD_ASSERT (s != NULL); | |
2b0f7ef9 JJ |
3674 | |
3675 | elf_finalize_dynstr (output_bfd, info); | |
3676 | ||
3677 | s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
252b5132 | 3678 | |
db6751f2 | 3679 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) |
dc810e39 | 3680 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NULL, (bfd_vma) 0)) |
b34976b6 | 3681 | return FALSE; |
252b5132 RH |
3682 | } |
3683 | ||
b34976b6 | 3684 | return TRUE; |
252b5132 RH |
3685 | } |
3686 | \f | |
2b0f7ef9 JJ |
3687 | /* This function is used to adjust offsets into .dynstr for |
3688 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
c44233aa | 3689 | |
b34976b6 AM |
3690 | static bfd_boolean elf_adjust_dynstr_offsets |
3691 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
c44233aa | 3692 | |
b34976b6 | 3693 | static bfd_boolean |
2b0f7ef9 JJ |
3694 | elf_adjust_dynstr_offsets (h, data) |
3695 | struct elf_link_hash_entry *h; | |
3696 | PTR data; | |
3697 | { | |
3698 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; | |
3699 | ||
e92d460e AM |
3700 | if (h->root.type == bfd_link_hash_warning) |
3701 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3702 | ||
2b0f7ef9 JJ |
3703 | if (h->dynindx != -1) |
3704 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
b34976b6 | 3705 | return TRUE; |
2b0f7ef9 JJ |
3706 | } |
3707 | ||
3708 | /* Assign string offsets in .dynstr, update all structures referencing | |
3709 | them. */ | |
3710 | ||
b34976b6 | 3711 | static bfd_boolean |
2b0f7ef9 JJ |
3712 | elf_finalize_dynstr (output_bfd, info) |
3713 | bfd *output_bfd; | |
3714 | struct bfd_link_info *info; | |
3715 | { | |
3716 | struct elf_link_local_dynamic_entry *entry; | |
3717 | struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr; | |
3718 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
3719 | asection *sdyn; | |
3720 | bfd_size_type size; | |
3721 | Elf_External_Dyn *dyncon, *dynconend; | |
3722 | ||
3723 | _bfd_elf_strtab_finalize (dynstr); | |
3724 | size = _bfd_elf_strtab_size (dynstr); | |
3725 | ||
3726 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3727 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3728 | BFD_ASSERT (sdyn != NULL); | |
3729 | ||
3730 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
3731 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
3732 | sdyn->_raw_size); | |
3733 | for (; dyncon < dynconend; dyncon++) | |
3734 | { | |
3735 | Elf_Internal_Dyn dyn; | |
3736 | ||
3737 | elf_swap_dyn_in (dynobj, dyncon, & dyn); | |
3738 | switch (dyn.d_tag) | |
3739 | { | |
3740 | case DT_STRSZ: | |
3741 | dyn.d_un.d_val = size; | |
3742 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3743 | break; | |
3744 | case DT_NEEDED: | |
3745 | case DT_SONAME: | |
3746 | case DT_RPATH: | |
3747 | case DT_RUNPATH: | |
3748 | case DT_FILTER: | |
3749 | case DT_AUXILIARY: | |
3750 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); | |
3751 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3752 | break; | |
3753 | default: | |
3754 | break; | |
3755 | } | |
3756 | } | |
3757 | ||
3758 | /* Now update local dynamic symbols. */ | |
3759 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
3760 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3761 | entry->isym.st_name); | |
3762 | ||
3763 | /* And the rest of dynamic symbols. */ | |
3764 | elf_link_hash_traverse (elf_hash_table (info), | |
3765 | elf_adjust_dynstr_offsets, dynstr); | |
3766 | ||
3767 | /* Adjust version definitions. */ | |
3768 | if (elf_tdata (output_bfd)->cverdefs) | |
3769 | { | |
3770 | asection *s; | |
3771 | bfd_byte *p; | |
3772 | bfd_size_type i; | |
3773 | Elf_Internal_Verdef def; | |
3774 | Elf_Internal_Verdaux defaux; | |
c44233aa | 3775 | |
2b0f7ef9 JJ |
3776 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
3777 | p = (bfd_byte *) s->contents; | |
3778 | do | |
3779 | { | |
3780 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3781 | &def); | |
3782 | p += sizeof (Elf_External_Verdef); | |
3783 | for (i = 0; i < def.vd_cnt; ++i) | |
3784 | { | |
3785 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3786 | (Elf_External_Verdaux *) p, &defaux); | |
3787 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3788 | defaux.vda_name); | |
3789 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3790 | &defaux, (Elf_External_Verdaux *) p); | |
3791 | p += sizeof (Elf_External_Verdaux); | |
3792 | } | |
3793 | } | |
3794 | while (def.vd_next); | |
3795 | } | |
3796 | ||
3797 | /* Adjust version references. */ | |
3798 | if (elf_tdata (output_bfd)->verref) | |
3799 | { | |
3800 | asection *s; | |
3801 | bfd_byte *p; | |
3802 | bfd_size_type i; | |
3803 | Elf_Internal_Verneed need; | |
3804 | Elf_Internal_Vernaux needaux; | |
c44233aa | 3805 | |
2b0f7ef9 JJ |
3806 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
3807 | p = (bfd_byte *) s->contents; | |
3808 | do | |
3809 | { | |
3810 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3811 | &need); | |
3812 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3813 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3814 | (Elf_External_Verneed *) p); | |
3815 | p += sizeof (Elf_External_Verneed); | |
3816 | for (i = 0; i < need.vn_cnt; ++i) | |
3817 | { | |
3818 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3819 | (Elf_External_Vernaux *) p, &needaux); | |
3820 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3821 | needaux.vna_name); | |
3822 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3823 | &needaux, | |
3824 | (Elf_External_Vernaux *) p); | |
3825 | p += sizeof (Elf_External_Vernaux); | |
3826 | } | |
3827 | } | |
3828 | while (need.vn_next); | |
3829 | } | |
3830 | ||
b34976b6 | 3831 | return TRUE; |
2b0f7ef9 JJ |
3832 | } |
3833 | ||
252b5132 RH |
3834 | /* Fix up the flags for a symbol. This handles various cases which |
3835 | can only be fixed after all the input files are seen. This is | |
3836 | currently called by both adjust_dynamic_symbol and | |
3837 | assign_sym_version, which is unnecessary but perhaps more robust in | |
3838 | the face of future changes. */ | |
3839 | ||
b34976b6 | 3840 | static bfd_boolean |
252b5132 RH |
3841 | elf_fix_symbol_flags (h, eif) |
3842 | struct elf_link_hash_entry *h; | |
3843 | struct elf_info_failed *eif; | |
3844 | { | |
3845 | /* If this symbol was mentioned in a non-ELF file, try to set | |
3846 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
3847 | permit a non-ELF file to correctly refer to a symbol defined in | |
3848 | an ELF dynamic object. */ | |
3849 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
3850 | { | |
94b6c40a L |
3851 | while (h->root.type == bfd_link_hash_indirect) |
3852 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3853 | ||
252b5132 RH |
3854 | if (h->root.type != bfd_link_hash_defined |
3855 | && h->root.type != bfd_link_hash_defweak) | |
3856 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3857 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3858 | else | |
3859 | { | |
3860 | if (h->root.u.def.section->owner != NULL | |
3861 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
3862 | == bfd_target_elf_flavour)) | |
3863 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3864 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3865 | else | |
3866 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3867 | } | |
3868 | ||
3869 | if (h->dynindx == -1 | |
3870 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3871 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
3872 | { | |
3873 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3874 | { | |
b34976b6 AM |
3875 | eif->failed = TRUE; |
3876 | return FALSE; | |
252b5132 RH |
3877 | } |
3878 | } | |
3879 | } | |
3880 | else | |
3881 | { | |
3882 | /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol | |
c44233aa AM |
3883 | was first seen in a non-ELF file. Fortunately, if the symbol |
3884 | was first seen in an ELF file, we're probably OK unless the | |
3885 | symbol was defined in a non-ELF file. Catch that case here. | |
3886 | FIXME: We're still in trouble if the symbol was first seen in | |
3887 | a dynamic object, and then later in a non-ELF regular object. */ | |
252b5132 RH |
3888 | if ((h->root.type == bfd_link_hash_defined |
3889 | || h->root.type == bfd_link_hash_defweak) | |
3890 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3891 | && (h->root.u.def.section->owner != NULL | |
3892 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
3893 | != bfd_target_elf_flavour) | |
3894 | : (bfd_is_abs_section (h->root.u.def.section) | |
3895 | && (h->elf_link_hash_flags | |
3896 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0))) | |
3897 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3898 | } | |
3899 | ||
3900 | /* If this is a final link, and the symbol was defined as a common | |
3901 | symbol in a regular object file, and there was no definition in | |
3902 | any dynamic object, then the linker will have allocated space for | |
3903 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
3904 | flag will not have been set. */ | |
3905 | if (h->root.type == bfd_link_hash_defined | |
3906 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3907 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3908 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3909 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
3910 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3911 | ||
3912 | /* If -Bsymbolic was used (which means to bind references to global | |
3913 | symbols to the definition within the shared object), and this | |
3914 | symbol was defined in a regular object, then it actually doesn't | |
d954b040 HPN |
3915 | need a PLT entry, and we can accomplish that by forcing it local. |
3916 | Likewise, if the symbol has hidden or internal visibility. | |
3917 | FIXME: It might be that we also do not need a PLT for other | |
3918 | non-hidden visibilities, but we would have to tell that to the | |
3919 | backend specifically; we can't just clear PLT-related data here. */ | |
252b5132 RH |
3920 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
3921 | && eif->info->shared | |
8ea2e4bd | 3922 | && is_elf_hash_table (eif->info) |
d954b040 HPN |
3923 | && (eif->info->symbolic |
3924 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3925 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
252b5132 RH |
3926 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
3927 | { | |
391a809a | 3928 | struct elf_backend_data *bed; |
b34976b6 | 3929 | bfd_boolean force_local; |
8ea2e4bd | 3930 | |
391a809a | 3931 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
e5094212 AM |
3932 | |
3933 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3934 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
3935 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
252b5132 RH |
3936 | } |
3937 | ||
fc4cc5bb ILT |
3938 | /* If this is a weak defined symbol in a dynamic object, and we know |
3939 | the real definition in the dynamic object, copy interesting flags | |
3940 | over to the real definition. */ | |
3941 | if (h->weakdef != NULL) | |
3942 | { | |
3943 | struct elf_link_hash_entry *weakdef; | |
3944 | ||
8e67855b NC |
3945 | weakdef = h->weakdef; |
3946 | if (h->root.type == bfd_link_hash_indirect) | |
3947 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3948 | ||
fc4cc5bb ILT |
3949 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
3950 | || h->root.type == bfd_link_hash_defweak); | |
fc4cc5bb ILT |
3951 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
3952 | || weakdef->root.type == bfd_link_hash_defweak); | |
3953 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
3954 | ||
3955 | /* If the real definition is defined by a regular object file, | |
3956 | don't do anything special. See the longer description in | |
3957 | elf_adjust_dynamic_symbol, below. */ | |
3958 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
3959 | h->weakdef = NULL; | |
3960 | else | |
0a991dfe AM |
3961 | { |
3962 | struct elf_backend_data *bed; | |
3963 | ||
3964 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); | |
b48fa14c | 3965 | (*bed->elf_backend_copy_indirect_symbol) (bed, weakdef, h); |
0a991dfe | 3966 | } |
fc4cc5bb ILT |
3967 | } |
3968 | ||
b34976b6 | 3969 | return TRUE; |
252b5132 RH |
3970 | } |
3971 | ||
3972 | /* Make the backend pick a good value for a dynamic symbol. This is | |
3973 | called via elf_link_hash_traverse, and also calls itself | |
3974 | recursively. */ | |
3975 | ||
b34976b6 | 3976 | static bfd_boolean |
252b5132 RH |
3977 | elf_adjust_dynamic_symbol (h, data) |
3978 | struct elf_link_hash_entry *h; | |
3979 | PTR data; | |
3980 | { | |
3981 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
3982 | bfd *dynobj; | |
3983 | struct elf_backend_data *bed; | |
3984 | ||
5cab59f6 AM |
3985 | if (! is_elf_hash_table (eif->info)) |
3986 | return FALSE; | |
3987 | ||
e92d460e AM |
3988 | if (h->root.type == bfd_link_hash_warning) |
3989 | { | |
5cab59f6 AM |
3990 | h->plt = elf_hash_table (eif->info)->init_offset; |
3991 | h->got = elf_hash_table (eif->info)->init_offset; | |
e92d460e AM |
3992 | |
3993 | /* When warning symbols are created, they **replace** the "real" | |
3994 | entry in the hash table, thus we never get to see the real | |
3995 | symbol in a hash traversal. So look at it now. */ | |
3996 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3997 | } | |
3998 | ||
252b5132 RH |
3999 | /* Ignore indirect symbols. These are added by the versioning code. */ |
4000 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 4001 | return TRUE; |
252b5132 RH |
4002 | |
4003 | /* Fix the symbol flags. */ | |
4004 | if (! elf_fix_symbol_flags (h, eif)) | |
b34976b6 | 4005 | return FALSE; |
252b5132 RH |
4006 | |
4007 | /* If this symbol does not require a PLT entry, and it is not | |
4008 | defined by a dynamic object, or is not referenced by a regular | |
4009 | object, ignore it. We do have to handle a weak defined symbol, | |
4010 | even if no regular object refers to it, if we decided to add it | |
4011 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
4012 | about symbols which are defined by one dynamic object and | |
4013 | referenced by another one? */ | |
4014 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 | |
4015 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4016 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4017 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 | |
4018 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
4019 | { | |
5cab59f6 | 4020 | h->plt = elf_hash_table (eif->info)->init_offset; |
b34976b6 | 4021 | return TRUE; |
252b5132 RH |
4022 | } |
4023 | ||
4024 | /* If we've already adjusted this symbol, don't do it again. This | |
4025 | can happen via a recursive call. */ | |
4026 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
b34976b6 | 4027 | return TRUE; |
252b5132 RH |
4028 | |
4029 | /* Don't look at this symbol again. Note that we must set this | |
4030 | after checking the above conditions, because we may look at a | |
4031 | symbol once, decide not to do anything, and then get called | |
4032 | recursively later after REF_REGULAR is set below. */ | |
4033 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4034 | ||
4035 | /* If this is a weak definition, and we know a real definition, and | |
4036 | the real symbol is not itself defined by a regular object file, | |
4037 | then get a good value for the real definition. We handle the | |
4038 | real symbol first, for the convenience of the backend routine. | |
4039 | ||
4040 | Note that there is a confusing case here. If the real definition | |
4041 | is defined by a regular object file, we don't get the real symbol | |
4042 | from the dynamic object, but we do get the weak symbol. If the | |
4043 | processor backend uses a COPY reloc, then if some routine in the | |
4044 | dynamic object changes the real symbol, we will not see that | |
4045 | change in the corresponding weak symbol. This is the way other | |
4046 | ELF linkers work as well, and seems to be a result of the shared | |
4047 | library model. | |
4048 | ||
4049 | I will clarify this issue. Most SVR4 shared libraries define the | |
4050 | variable _timezone and define timezone as a weak synonym. The | |
4051 | tzset call changes _timezone. If you write | |
4052 | extern int timezone; | |
4053 | int _timezone = 5; | |
4054 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4055 | you might expect that, since timezone is a synonym for _timezone, | |
4056 | the same number will print both times. However, if the processor | |
4057 | backend uses a COPY reloc, then actually timezone will be copied | |
4058 | into your process image, and, since you define _timezone | |
4059 | yourself, _timezone will not. Thus timezone and _timezone will | |
4060 | wind up at different memory locations. The tzset call will set | |
4061 | _timezone, leaving timezone unchanged. */ | |
4062 | ||
4063 | if (h->weakdef != NULL) | |
4064 | { | |
fc4cc5bb ILT |
4065 | /* If we get to this point, we know there is an implicit |
4066 | reference by a regular object file via the weak symbol H. | |
4067 | FIXME: Is this really true? What if the traversal finds | |
4068 | H->WEAKDEF before it finds H? */ | |
4069 | h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
252b5132 | 4070 | |
fc4cc5bb | 4071 | if (! elf_adjust_dynamic_symbol (h->weakdef, (PTR) eif)) |
b34976b6 | 4072 | return FALSE; |
252b5132 RH |
4073 | } |
4074 | ||
4075 | /* If a symbol has no type and no size and does not require a PLT | |
4076 | entry, then we are probably about to do the wrong thing here: we | |
4077 | are probably going to create a COPY reloc for an empty object. | |
4078 | This case can arise when a shared object is built with assembly | |
4079 | code, and the assembly code fails to set the symbol type. */ | |
4080 | if (h->size == 0 | |
4081 | && h->type == STT_NOTYPE | |
4082 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
4083 | (*_bfd_error_handler) | |
4084 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
58821868 | 4085 | h->root.root.string); |
252b5132 RH |
4086 | |
4087 | dynobj = elf_hash_table (eif->info)->dynobj; | |
4088 | bed = get_elf_backend_data (dynobj); | |
4089 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
4090 | { | |
b34976b6 AM |
4091 | eif->failed = TRUE; |
4092 | return FALSE; | |
252b5132 RH |
4093 | } |
4094 | ||
b34976b6 | 4095 | return TRUE; |
252b5132 RH |
4096 | } |
4097 | \f | |
4098 | /* This routine is used to export all defined symbols into the dynamic | |
4099 | symbol table. It is called via elf_link_hash_traverse. */ | |
4100 | ||
b34976b6 | 4101 | static bfd_boolean |
252b5132 RH |
4102 | elf_export_symbol (h, data) |
4103 | struct elf_link_hash_entry *h; | |
4104 | PTR data; | |
4105 | { | |
4106 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
4107 | ||
4108 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
4109 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 4110 | return TRUE; |
252b5132 | 4111 | |
e92d460e AM |
4112 | if (h->root.type == bfd_link_hash_warning) |
4113 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4114 | ||
252b5132 RH |
4115 | if (h->dynindx == -1 |
4116 | && (h->elf_link_hash_flags | |
4117 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4118 | { | |
bc2b6df7 L |
4119 | struct bfd_elf_version_tree *t; |
4120 | struct bfd_elf_version_expr *d; | |
4121 | ||
4122 | for (t = eif->verdefs; t != NULL; t = t->next) | |
252b5132 | 4123 | { |
bc2b6df7 L |
4124 | if (t->globals != NULL) |
4125 | { | |
4126 | for (d = t->globals; d != NULL; d = d->next) | |
4127 | { | |
4128 | if ((*d->match) (d, h->root.root.string)) | |
4129 | goto doit; | |
4130 | } | |
4131 | } | |
4132 | ||
4133 | if (t->locals != NULL) | |
4134 | { | |
4135 | for (d = t->locals ; d != NULL; d = d->next) | |
4136 | { | |
4137 | if ((*d->match) (d, h->root.root.string)) | |
b34976b6 | 4138 | return TRUE; |
bc2b6df7 L |
4139 | } |
4140 | } | |
252b5132 | 4141 | } |
bc2b6df7 L |
4142 | |
4143 | if (!eif->verdefs) | |
c44233aa | 4144 | { |
58821868 | 4145 | doit: |
bc2b6df7 L |
4146 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
4147 | { | |
b34976b6 AM |
4148 | eif->failed = TRUE; |
4149 | return FALSE; | |
bc2b6df7 | 4150 | } |
c44233aa | 4151 | } |
252b5132 RH |
4152 | } |
4153 | ||
b34976b6 | 4154 | return TRUE; |
252b5132 RH |
4155 | } |
4156 | \f | |
4157 | /* Look through the symbols which are defined in other shared | |
4158 | libraries and referenced here. Update the list of version | |
4159 | dependencies. This will be put into the .gnu.version_r section. | |
4160 | This function is called via elf_link_hash_traverse. */ | |
4161 | ||
b34976b6 | 4162 | static bfd_boolean |
252b5132 RH |
4163 | elf_link_find_version_dependencies (h, data) |
4164 | struct elf_link_hash_entry *h; | |
4165 | PTR data; | |
4166 | { | |
4167 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
4168 | Elf_Internal_Verneed *t; | |
4169 | Elf_Internal_Vernaux *a; | |
dc810e39 | 4170 | bfd_size_type amt; |
252b5132 | 4171 | |
e92d460e AM |
4172 | if (h->root.type == bfd_link_hash_warning) |
4173 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4174 | ||
252b5132 RH |
4175 | /* We only care about symbols defined in shared objects with version |
4176 | information. */ | |
4177 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4178 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4179 | || h->dynindx == -1 | |
4180 | || h->verinfo.verdef == NULL) | |
b34976b6 | 4181 | return TRUE; |
252b5132 RH |
4182 | |
4183 | /* See if we already know about this version. */ | |
4184 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
4185 | { | |
4186 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
4187 | continue; | |
4188 | ||
4189 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
4190 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
b34976b6 | 4191 | return TRUE; |
252b5132 RH |
4192 | |
4193 | break; | |
4194 | } | |
4195 | ||
4196 | /* This is a new version. Add it to tree we are building. */ | |
4197 | ||
4198 | if (t == NULL) | |
4199 | { | |
dc810e39 AM |
4200 | amt = sizeof *t; |
4201 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4202 | if (t == NULL) |
4203 | { | |
b34976b6 AM |
4204 | rinfo->failed = TRUE; |
4205 | return FALSE; | |
252b5132 RH |
4206 | } |
4207 | ||
4208 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
4209 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
4210 | elf_tdata (rinfo->output_bfd)->verref = t; | |
4211 | } | |
4212 | ||
dc810e39 AM |
4213 | amt = sizeof *a; |
4214 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4215 | |
4216 | /* Note that we are copying a string pointer here, and testing it | |
4217 | above. If bfd_elf_string_from_elf_section is ever changed to | |
4218 | discard the string data when low in memory, this will have to be | |
4219 | fixed. */ | |
4220 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
4221 | ||
4222 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
4223 | a->vna_nextptr = t->vn_auxptr; | |
4224 | ||
4225 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
4226 | ++rinfo->vers; | |
4227 | ||
4228 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
4229 | ||
4230 | t->vn_auxptr = a; | |
4231 | ||
b34976b6 | 4232 | return TRUE; |
252b5132 RH |
4233 | } |
4234 | ||
4235 | /* Figure out appropriate versions for all the symbols. We may not | |
4236 | have the version number script until we have read all of the input | |
4237 | files, so until that point we don't know which symbols should be | |
4238 | local. This function is called via elf_link_hash_traverse. */ | |
4239 | ||
b34976b6 | 4240 | static bfd_boolean |
252b5132 RH |
4241 | elf_link_assign_sym_version (h, data) |
4242 | struct elf_link_hash_entry *h; | |
4243 | PTR data; | |
4244 | { | |
dc810e39 AM |
4245 | struct elf_assign_sym_version_info *sinfo; |
4246 | struct bfd_link_info *info; | |
c61b8717 | 4247 | struct elf_backend_data *bed; |
252b5132 RH |
4248 | struct elf_info_failed eif; |
4249 | char *p; | |
dc810e39 AM |
4250 | bfd_size_type amt; |
4251 | ||
4252 | sinfo = (struct elf_assign_sym_version_info *) data; | |
4253 | info = sinfo->info; | |
252b5132 | 4254 | |
e92d460e AM |
4255 | if (h->root.type == bfd_link_hash_warning) |
4256 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4257 | ||
252b5132 | 4258 | /* Fix the symbol flags. */ |
b34976b6 | 4259 | eif.failed = FALSE; |
252b5132 RH |
4260 | eif.info = info; |
4261 | if (! elf_fix_symbol_flags (h, &eif)) | |
4262 | { | |
4263 | if (eif.failed) | |
b34976b6 AM |
4264 | sinfo->failed = TRUE; |
4265 | return FALSE; | |
252b5132 RH |
4266 | } |
4267 | ||
4268 | /* We only need version numbers for symbols defined in regular | |
4269 | objects. */ | |
4270 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
b34976b6 | 4271 | return TRUE; |
252b5132 | 4272 | |
c61b8717 | 4273 | bed = get_elf_backend_data (sinfo->output_bfd); |
252b5132 RH |
4274 | p = strchr (h->root.root.string, ELF_VER_CHR); |
4275 | if (p != NULL && h->verinfo.vertree == NULL) | |
4276 | { | |
4277 | struct bfd_elf_version_tree *t; | |
b34976b6 | 4278 | bfd_boolean hidden; |
252b5132 | 4279 | |
b34976b6 | 4280 | hidden = TRUE; |
252b5132 RH |
4281 | |
4282 | /* There are two consecutive ELF_VER_CHR characters if this is | |
c44233aa | 4283 | not a hidden symbol. */ |
252b5132 RH |
4284 | ++p; |
4285 | if (*p == ELF_VER_CHR) | |
4286 | { | |
b34976b6 | 4287 | hidden = FALSE; |
252b5132 RH |
4288 | ++p; |
4289 | } | |
4290 | ||
4291 | /* If there is no version string, we can just return out. */ | |
4292 | if (*p == '\0') | |
4293 | { | |
4294 | if (hidden) | |
4295 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
b34976b6 | 4296 | return TRUE; |
252b5132 RH |
4297 | } |
4298 | ||
4299 | /* Look for the version. If we find it, it is no longer weak. */ | |
4300 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
4301 | { | |
4302 | if (strcmp (t->name, p) == 0) | |
4303 | { | |
dc810e39 | 4304 | size_t len; |
252b5132 RH |
4305 | char *alc; |
4306 | struct bfd_elf_version_expr *d; | |
4307 | ||
4308 | len = p - h->root.root.string; | |
e5094212 | 4309 | alc = bfd_malloc ((bfd_size_type) len); |
252b5132 | 4310 | if (alc == NULL) |
b34976b6 | 4311 | return FALSE; |
d4c88bbb | 4312 | memcpy (alc, h->root.root.string, len - 1); |
252b5132 RH |
4313 | alc[len - 1] = '\0'; |
4314 | if (alc[len - 2] == ELF_VER_CHR) | |
c44233aa | 4315 | alc[len - 2] = '\0'; |
252b5132 RH |
4316 | |
4317 | h->verinfo.vertree = t; | |
b34976b6 | 4318 | t->used = TRUE; |
252b5132 RH |
4319 | d = NULL; |
4320 | ||
4321 | if (t->globals != NULL) | |
4322 | { | |
4323 | for (d = t->globals; d != NULL; d = d->next) | |
4324 | if ((*d->match) (d, alc)) | |
4325 | break; | |
4326 | } | |
4327 | ||
4328 | /* See if there is anything to force this symbol to | |
c44233aa | 4329 | local scope. */ |
252b5132 RH |
4330 | if (d == NULL && t->locals != NULL) |
4331 | { | |
4332 | for (d = t->locals; d != NULL; d = d->next) | |
4333 | { | |
4334 | if ((*d->match) (d, alc)) | |
4335 | { | |
4336 | if (h->dynindx != -1 | |
4337 | && info->shared | |
99293407 | 4338 | && ! info->export_dynamic) |
252b5132 | 4339 | { |
b34976b6 | 4340 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4341 | } |
4342 | ||
4343 | break; | |
4344 | } | |
4345 | } | |
4346 | } | |
4347 | ||
e5094212 | 4348 | free (alc); |
252b5132 RH |
4349 | break; |
4350 | } | |
4351 | } | |
4352 | ||
4353 | /* If we are building an application, we need to create a | |
c44233aa | 4354 | version node for this version. */ |
252b5132 RH |
4355 | if (t == NULL && ! info->shared) |
4356 | { | |
4357 | struct bfd_elf_version_tree **pp; | |
4358 | int version_index; | |
4359 | ||
4360 | /* If we aren't going to export this symbol, we don't need | |
c44233aa | 4361 | to worry about it. */ |
252b5132 | 4362 | if (h->dynindx == -1) |
b34976b6 | 4363 | return TRUE; |
252b5132 | 4364 | |
dc810e39 | 4365 | amt = sizeof *t; |
252b5132 | 4366 | t = ((struct bfd_elf_version_tree *) |
dc810e39 | 4367 | bfd_alloc (sinfo->output_bfd, amt)); |
252b5132 RH |
4368 | if (t == NULL) |
4369 | { | |
b34976b6 AM |
4370 | sinfo->failed = TRUE; |
4371 | return FALSE; | |
252b5132 RH |
4372 | } |
4373 | ||
4374 | t->next = NULL; | |
4375 | t->name = p; | |
4376 | t->globals = NULL; | |
4377 | t->locals = NULL; | |
4378 | t->deps = NULL; | |
4379 | t->name_indx = (unsigned int) -1; | |
b34976b6 | 4380 | t->used = TRUE; |
252b5132 RH |
4381 | |
4382 | version_index = 1; | |
6b9b879a JJ |
4383 | /* Don't count anonymous version tag. */ |
4384 | if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0) | |
4385 | version_index = 0; | |
252b5132 RH |
4386 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) |
4387 | ++version_index; | |
4388 | t->vernum = version_index; | |
4389 | ||
4390 | *pp = t; | |
4391 | ||
4392 | h->verinfo.vertree = t; | |
4393 | } | |
4394 | else if (t == NULL) | |
4395 | { | |
4396 | /* We could not find the version for a symbol when | |
c44233aa | 4397 | generating a shared archive. Return an error. */ |
252b5132 RH |
4398 | (*_bfd_error_handler) |
4399 | (_("%s: undefined versioned symbol name %s"), | |
4400 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
4401 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 AM |
4402 | sinfo->failed = TRUE; |
4403 | return FALSE; | |
252b5132 RH |
4404 | } |
4405 | ||
4406 | if (hidden) | |
4407 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
4408 | } | |
4409 | ||
4410 | /* If we don't have a version for this symbol, see if we can find | |
4411 | something. */ | |
4412 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
4413 | { | |
4414 | struct bfd_elf_version_tree *t; | |
58821868 | 4415 | struct bfd_elf_version_tree *local_ver; |
252b5132 RH |
4416 | struct bfd_elf_version_expr *d; |
4417 | ||
4418 | /* See if can find what version this symbol is in. If the | |
c44233aa AM |
4419 | symbol is supposed to be local, then don't actually register |
4420 | it. */ | |
58821868 | 4421 | local_ver = NULL; |
252b5132 RH |
4422 | for (t = sinfo->verdefs; t != NULL; t = t->next) |
4423 | { | |
4424 | if (t->globals != NULL) | |
4425 | { | |
b34976b6 | 4426 | bfd_boolean matched; |
31941635 | 4427 | |
b34976b6 | 4428 | matched = FALSE; |
252b5132 RH |
4429 | for (d = t->globals; d != NULL; d = d->next) |
4430 | { | |
4431 | if ((*d->match) (d, h->root.root.string)) | |
4432 | { | |
31941635 | 4433 | if (d->symver) |
b34976b6 | 4434 | matched = TRUE; |
31941635 L |
4435 | else |
4436 | { | |
4437 | /* There is a version without definition. Make | |
4438 | the symbol the default definition for this | |
4439 | version. */ | |
4440 | h->verinfo.vertree = t; | |
4441 | local_ver = NULL; | |
4442 | d->script = 1; | |
4443 | break; | |
4444 | } | |
252b5132 RH |
4445 | } |
4446 | } | |
4447 | ||
4448 | if (d != NULL) | |
4449 | break; | |
31941635 L |
4450 | else if (matched) |
4451 | /* There is no undefined version for this symbol. Hide the | |
4452 | default one. */ | |
b34976b6 | 4453 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4454 | } |
4455 | ||
4456 | if (t->locals != NULL) | |
4457 | { | |
4458 | for (d = t->locals; d != NULL; d = d->next) | |
4459 | { | |
58821868 AM |
4460 | /* If the match is "*", keep looking for a more |
4461 | explicit, perhaps even global, match. */ | |
252b5132 | 4462 | if (d->pattern[0] == '*' && d->pattern[1] == '\0') |
58821868 | 4463 | local_ver = t; |
252b5132 RH |
4464 | else if ((*d->match) (d, h->root.root.string)) |
4465 | { | |
58821868 | 4466 | local_ver = t; |
252b5132 RH |
4467 | break; |
4468 | } | |
4469 | } | |
4470 | ||
4471 | if (d != NULL) | |
4472 | break; | |
4473 | } | |
4474 | } | |
4475 | ||
58821868 | 4476 | if (local_ver != NULL) |
252b5132 | 4477 | { |
58821868 | 4478 | h->verinfo.vertree = local_ver; |
252b5132 RH |
4479 | if (h->dynindx != -1 |
4480 | && info->shared | |
99293407 | 4481 | && ! info->export_dynamic) |
252b5132 | 4482 | { |
b34976b6 | 4483 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4484 | } |
4485 | } | |
4486 | } | |
4487 | ||
b34976b6 | 4488 | return TRUE; |
252b5132 | 4489 | } |
252b5132 RH |
4490 | \f |
4491 | /* Final phase of ELF linker. */ | |
4492 | ||
4493 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4494 | ||
4495 | struct elf_final_link_info | |
4496 | { | |
4497 | /* General link information. */ | |
4498 | struct bfd_link_info *info; | |
4499 | /* Output BFD. */ | |
4500 | bfd *output_bfd; | |
4501 | /* Symbol string table. */ | |
4502 | struct bfd_strtab_hash *symstrtab; | |
4503 | /* .dynsym section. */ | |
4504 | asection *dynsym_sec; | |
4505 | /* .hash section. */ | |
4506 | asection *hash_sec; | |
4507 | /* symbol version section (.gnu.version). */ | |
4508 | asection *symver_sec; | |
13ae64f3 JJ |
4509 | /* first SHF_TLS section (if any). */ |
4510 | asection *first_tls_sec; | |
252b5132 RH |
4511 | /* Buffer large enough to hold contents of any section. */ |
4512 | bfd_byte *contents; | |
4513 | /* Buffer large enough to hold external relocs of any section. */ | |
4514 | PTR external_relocs; | |
4515 | /* Buffer large enough to hold internal relocs of any section. */ | |
4516 | Elf_Internal_Rela *internal_relocs; | |
4517 | /* Buffer large enough to hold external local symbols of any input | |
4518 | BFD. */ | |
4519 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
4520 | /* And a buffer for symbol section indices. */ |
4521 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
4522 | /* Buffer large enough to hold internal local symbols of any input |
4523 | BFD. */ | |
4524 | Elf_Internal_Sym *internal_syms; | |
4525 | /* Array large enough to hold a symbol index for each local symbol | |
4526 | of any input BFD. */ | |
4527 | long *indices; | |
4528 | /* Array large enough to hold a section pointer for each local | |
4529 | symbol of any input BFD. */ | |
4530 | asection **sections; | |
4531 | /* Buffer to hold swapped out symbols. */ | |
4532 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
4533 | /* And one for symbol section indices. */ |
4534 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
4535 | /* Number of swapped out symbols in buffer. */ |
4536 | size_t symbuf_count; | |
4537 | /* Number of symbols which fit in symbuf. */ | |
4538 | size_t symbuf_size; | |
c97e73dd AM |
4539 | /* And same for symshndxbuf. */ |
4540 | size_t shndxbuf_size; | |
252b5132 RH |
4541 | }; |
4542 | ||
b34976b6 | 4543 | static bfd_boolean elf_link_output_sym |
252b5132 RH |
4544 | PARAMS ((struct elf_final_link_info *, const char *, |
4545 | Elf_Internal_Sym *, asection *)); | |
b34976b6 | 4546 | static bfd_boolean elf_link_flush_output_syms |
252b5132 | 4547 | PARAMS ((struct elf_final_link_info *)); |
b34976b6 | 4548 | static bfd_boolean elf_link_output_extsym |
252b5132 | 4549 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4550 | static bfd_boolean elf_link_sec_merge_syms |
f5fa8ca2 | 4551 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4552 | static bfd_boolean elf_link_check_versioned_symbol |
f5d44ba0 | 4553 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 4554 | static bfd_boolean elf_link_input_bfd |
252b5132 | 4555 | PARAMS ((struct elf_final_link_info *, bfd *)); |
b34976b6 | 4556 | static bfd_boolean elf_reloc_link_order |
252b5132 RH |
4557 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
4558 | struct bfd_link_order *)); | |
4559 | ||
4560 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
4561 | ||
4562 | struct elf_outext_info | |
4563 | { | |
b34976b6 AM |
4564 | bfd_boolean failed; |
4565 | bfd_boolean localsyms; | |
252b5132 RH |
4566 | struct elf_final_link_info *finfo; |
4567 | }; | |
4568 | ||
23bc299b MM |
4569 | /* Compute the size of, and allocate space for, REL_HDR which is the |
4570 | section header for a section containing relocations for O. */ | |
4571 | ||
b34976b6 | 4572 | static bfd_boolean |
23bc299b MM |
4573 | elf_link_size_reloc_section (abfd, rel_hdr, o) |
4574 | bfd *abfd; | |
4575 | Elf_Internal_Shdr *rel_hdr; | |
4576 | asection *o; | |
4577 | { | |
dc810e39 AM |
4578 | bfd_size_type reloc_count; |
4579 | bfd_size_type num_rel_hashes; | |
23bc299b | 4580 | |
b037af20 MM |
4581 | /* Figure out how many relocations there will be. */ |
4582 | if (rel_hdr == &elf_section_data (o)->rel_hdr) | |
4583 | reloc_count = elf_section_data (o)->rel_count; | |
4584 | else | |
4585 | reloc_count = elf_section_data (o)->rel_count2; | |
4586 | ||
9317eacc CM |
4587 | num_rel_hashes = o->reloc_count; |
4588 | if (num_rel_hashes < reloc_count) | |
4589 | num_rel_hashes = reloc_count; | |
dc810e39 | 4590 | |
b037af20 MM |
4591 | /* That allows us to calculate the size of the section. */ |
4592 | rel_hdr->sh_size = rel_hdr->sh_entsize * reloc_count; | |
23bc299b MM |
4593 | |
4594 | /* The contents field must last into write_object_contents, so we | |
755cfd29 NC |
4595 | allocate it with bfd_alloc rather than malloc. Also since we |
4596 | cannot be sure that the contents will actually be filled in, | |
4597 | we zero the allocated space. */ | |
4598 | rel_hdr->contents = (PTR) bfd_zalloc (abfd, rel_hdr->sh_size); | |
23bc299b | 4599 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
b34976b6 | 4600 | return FALSE; |
3e932841 | 4601 | |
b037af20 MM |
4602 | /* We only allocate one set of hash entries, so we only do it the |
4603 | first time we are called. */ | |
9317eacc CM |
4604 | if (elf_section_data (o)->rel_hashes == NULL |
4605 | && num_rel_hashes) | |
b037af20 | 4606 | { |
209f668e NC |
4607 | struct elf_link_hash_entry **p; |
4608 | ||
b037af20 | 4609 | p = ((struct elf_link_hash_entry **) |
9317eacc | 4610 | bfd_zmalloc (num_rel_hashes |
209f668e | 4611 | * sizeof (struct elf_link_hash_entry *))); |
9317eacc | 4612 | if (p == NULL) |
b34976b6 | 4613 | return FALSE; |
23bc299b | 4614 | |
b037af20 | 4615 | elf_section_data (o)->rel_hashes = p; |
b037af20 | 4616 | } |
23bc299b | 4617 | |
b34976b6 | 4618 | return TRUE; |
23bc299b MM |
4619 | } |
4620 | ||
31367b81 MM |
4621 | /* When performing a relocateable link, the input relocations are |
4622 | preserved. But, if they reference global symbols, the indices | |
4623 | referenced must be updated. Update all the relocations in | |
4624 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
4625 | ||
4626 | static void | |
4627 | elf_link_adjust_relocs (abfd, rel_hdr, count, rel_hash) | |
4628 | bfd *abfd; | |
4629 | Elf_Internal_Shdr *rel_hdr; | |
4630 | unsigned int count; | |
4631 | struct elf_link_hash_entry **rel_hash; | |
4632 | { | |
4633 | unsigned int i; | |
32f0787a | 4634 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf AM |
4635 | bfd_byte *erela; |
4636 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); | |
4637 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
209f668e | 4638 | |
947216bf | 4639 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
209f668e | 4640 | { |
947216bf AM |
4641 | swap_in = bed->s->swap_reloc_in; |
4642 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 4643 | } |
947216bf | 4644 | else if (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) |
209f668e | 4645 | { |
947216bf AM |
4646 | swap_in = bed->s->swap_reloca_in; |
4647 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 4648 | } |
947216bf AM |
4649 | else |
4650 | abort (); | |
4651 | ||
4652 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
4653 | abort (); | |
31367b81 | 4654 | |
947216bf AM |
4655 | erela = rel_hdr->contents; |
4656 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 4657 | { |
947216bf AM |
4658 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
4659 | unsigned int j; | |
4660 | ||
31367b81 MM |
4661 | if (*rel_hash == NULL) |
4662 | continue; | |
4663 | ||
4664 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
4665 | ||
947216bf AM |
4666 | (*swap_in) (abfd, erela, irela); |
4667 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
4668 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
4669 | ELF_R_TYPE (irela[j].r_info)); | |
4670 | (*swap_out) (abfd, irela, erela); | |
31367b81 MM |
4671 | } |
4672 | } | |
4673 | ||
58821868 AM |
4674 | struct elf_link_sort_rela |
4675 | { | |
db6751f2 JJ |
4676 | bfd_vma offset; |
4677 | enum elf_reloc_type_class type; | |
947216bf AM |
4678 | /* We use this as an array of size int_rels_per_ext_rel. */ |
4679 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
4680 | }; |
4681 | ||
4682 | static int | |
4683 | elf_link_sort_cmp1 (A, B) | |
4684 | const PTR A; | |
4685 | const PTR B; | |
4686 | { | |
f51e552e AM |
4687 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4688 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4689 | int relativea, relativeb; |
4690 | ||
4691 | relativea = a->type == reloc_class_relative; | |
4692 | relativeb = b->type == reloc_class_relative; | |
4693 | ||
4694 | if (relativea < relativeb) | |
db6751f2 | 4695 | return 1; |
fcfbdf31 JJ |
4696 | if (relativea > relativeb) |
4697 | return -1; | |
947216bf | 4698 | if (ELF_R_SYM (a->rela->r_info) < ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4699 | return -1; |
947216bf | 4700 | if (ELF_R_SYM (a->rela->r_info) > ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4701 | return 1; |
947216bf | 4702 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4703 | return -1; |
947216bf | 4704 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4705 | return 1; |
4706 | return 0; | |
4707 | } | |
4708 | ||
4709 | static int | |
4710 | elf_link_sort_cmp2 (A, B) | |
4711 | const PTR A; | |
4712 | const PTR B; | |
4713 | { | |
f51e552e AM |
4714 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4715 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4716 | int copya, copyb; |
4717 | ||
4718 | if (a->offset < b->offset) | |
4719 | return -1; | |
4720 | if (a->offset > b->offset) | |
4721 | return 1; | |
290394d6 JJ |
4722 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
4723 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
4724 | if (copya < copyb) |
4725 | return -1; | |
4726 | if (copya > copyb) | |
4727 | return 1; | |
947216bf | 4728 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4729 | return -1; |
947216bf | 4730 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4731 | return 1; |
4732 | return 0; | |
4733 | } | |
4734 | ||
4735 | static size_t | |
4736 | elf_link_sort_relocs (abfd, info, psec) | |
4737 | bfd *abfd; | |
4738 | struct bfd_link_info *info; | |
4739 | asection **psec; | |
4740 | { | |
4741 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
4742 | asection *reldyn, *o; | |
f51e552e | 4743 | bfd_size_type count, size; |
947216bf AM |
4744 | size_t i, ret, sort_elt, ext_size; |
4745 | bfd_byte *sort, *s_non_relative, *p; | |
4746 | struct elf_link_sort_rela *sq; | |
db6751f2 | 4747 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 4748 | int i2e = bed->s->int_rels_per_ext_rel; |
947216bf AM |
4749 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
4750 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
db6751f2 JJ |
4751 | |
4752 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
4753 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4754 | { | |
4755 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
4756 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4757 | return 0; | |
947216bf AM |
4758 | ext_size = sizeof (Elf_External_Rel); |
4759 | swap_in = bed->s->swap_reloc_in; | |
4760 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
4761 | } |
4762 | else | |
947216bf AM |
4763 | { |
4764 | ext_size = sizeof (Elf_External_Rela); | |
4765 | swap_in = bed->s->swap_reloca_in; | |
4766 | swap_out = bed->s->swap_reloca_out; | |
4767 | } | |
4768 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
4769 | |
4770 | size = 0; | |
4771 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4772 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4773 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4774 | && o->output_section == reldyn) | |
4775 | size += o->_raw_size; | |
4776 | ||
4777 | if (size != reldyn->_raw_size) | |
4778 | return 0; | |
4779 | ||
947216bf AM |
4780 | sort_elt = (sizeof (struct elf_link_sort_rela) |
4781 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
4782 | sort = bfd_zmalloc (sort_elt * count); | |
4783 | if (sort == NULL) | |
db6751f2 JJ |
4784 | { |
4785 | (*info->callbacks->warning) | |
dc810e39 AM |
4786 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, |
4787 | (bfd_vma) 0); | |
db6751f2 JJ |
4788 | return 0; |
4789 | } | |
4790 | ||
4791 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4792 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4793 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4794 | && o->output_section == reldyn) | |
4795 | { | |
947216bf | 4796 | bfd_byte *erel, *erelend; |
db6751f2 | 4797 | |
947216bf AM |
4798 | erel = o->contents; |
4799 | erelend = o->contents + o->_raw_size; | |
4800 | p = sort + o->output_offset / ext_size * sort_elt; | |
4801 | while (erel < erelend) | |
db6751f2 | 4802 | { |
947216bf AM |
4803 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4804 | (*swap_in) (abfd, erel, s->rela); | |
4805 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
4806 | p += sort_elt; | |
4807 | erel += ext_size; | |
db6751f2 JJ |
4808 | } |
4809 | } | |
4810 | ||
947216bf AM |
4811 | qsort (sort, (size_t) count, sort_elt, elf_link_sort_cmp1); |
4812 | ||
4813 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 4814 | { |
947216bf AM |
4815 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4816 | if (s->type != reloc_class_relative) | |
4817 | break; | |
db6751f2 | 4818 | } |
947216bf AM |
4819 | ret = i; |
4820 | s_non_relative = p; | |
4821 | ||
4822 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
4823 | for (; i < count; i++, p += sort_elt) | |
4824 | { | |
4825 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
4826 | if (ELF_R_SYM (sp->rela->r_info) != ELF_R_SYM (sq->rela->r_info)) | |
4827 | sq = sp; | |
4828 | sp->offset = sq->rela->r_offset; | |
4829 | } | |
4830 | ||
4831 | qsort (s_non_relative, (size_t) count - ret, sort_elt, elf_link_sort_cmp2); | |
dc810e39 | 4832 | |
db6751f2 JJ |
4833 | for (o = dynobj->sections; o != NULL; o = o->next) |
4834 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4835 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4836 | && o->output_section == reldyn) | |
4837 | { | |
947216bf | 4838 | bfd_byte *erel, *erelend; |
db6751f2 | 4839 | |
947216bf AM |
4840 | erel = o->contents; |
4841 | erelend = o->contents + o->_raw_size; | |
4842 | p = sort + o->output_offset / ext_size * sort_elt; | |
4843 | while (erel < erelend) | |
db6751f2 | 4844 | { |
947216bf AM |
4845 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4846 | (*swap_out) (abfd, s->rela, erel); | |
4847 | p += sort_elt; | |
4848 | erel += ext_size; | |
db6751f2 JJ |
4849 | } |
4850 | } | |
4851 | ||
db6751f2 JJ |
4852 | *psec = reldyn; |
4853 | return ret; | |
4854 | } | |
4855 | ||
252b5132 RH |
4856 | /* Do the final step of an ELF link. */ |
4857 | ||
b34976b6 | 4858 | bfd_boolean |
252b5132 RH |
4859 | elf_bfd_final_link (abfd, info) |
4860 | bfd *abfd; | |
4861 | struct bfd_link_info *info; | |
4862 | { | |
b34976b6 AM |
4863 | bfd_boolean dynamic; |
4864 | bfd_boolean emit_relocs; | |
252b5132 RH |
4865 | bfd *dynobj; |
4866 | struct elf_final_link_info finfo; | |
4867 | register asection *o; | |
4868 | register struct bfd_link_order *p; | |
4869 | register bfd *sub; | |
dc810e39 AM |
4870 | bfd_size_type max_contents_size; |
4871 | bfd_size_type max_external_reloc_size; | |
4872 | bfd_size_type max_internal_reloc_count; | |
4873 | bfd_size_type max_sym_count; | |
9ad5cbcf | 4874 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
4875 | file_ptr off; |
4876 | Elf_Internal_Sym elfsym; | |
4877 | unsigned int i; | |
4878 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 4879 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 RH |
4880 | Elf_Internal_Shdr *symstrtab_hdr; |
4881 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4882 | struct elf_outext_info eoinfo; | |
b34976b6 | 4883 | bfd_boolean merged; |
db6751f2 JJ |
4884 | size_t relativecount = 0; |
4885 | asection *reldyn = 0; | |
dc810e39 | 4886 | bfd_size_type amt; |
252b5132 | 4887 | |
8ea2e4bd | 4888 | if (! is_elf_hash_table (info)) |
b34976b6 | 4889 | return FALSE; |
8ea2e4bd | 4890 | |
252b5132 RH |
4891 | if (info->shared) |
4892 | abfd->flags |= DYNAMIC; | |
4893 | ||
4894 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
4895 | dynobj = elf_hash_table (info)->dynobj; | |
4896 | ||
9317eacc | 4897 | emit_relocs = (info->relocateable |
c44233aa AM |
4898 | || info->emitrelocations |
4899 | || bed->elf_backend_emit_relocs); | |
9317eacc | 4900 | |
252b5132 RH |
4901 | finfo.info = info; |
4902 | finfo.output_bfd = abfd; | |
4903 | finfo.symstrtab = elf_stringtab_init (); | |
4904 | if (finfo.symstrtab == NULL) | |
b34976b6 | 4905 | return FALSE; |
252b5132 RH |
4906 | |
4907 | if (! dynamic) | |
4908 | { | |
4909 | finfo.dynsym_sec = NULL; | |
4910 | finfo.hash_sec = NULL; | |
4911 | finfo.symver_sec = NULL; | |
4912 | } | |
4913 | else | |
4914 | { | |
4915 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4916 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
4917 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
4918 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
4919 | /* Note that it is OK if symver_sec is NULL. */ | |
4920 | } | |
4921 | ||
4922 | finfo.contents = NULL; | |
4923 | finfo.external_relocs = NULL; | |
4924 | finfo.internal_relocs = NULL; | |
4925 | finfo.external_syms = NULL; | |
9ad5cbcf | 4926 | finfo.locsym_shndx = NULL; |
252b5132 RH |
4927 | finfo.internal_syms = NULL; |
4928 | finfo.indices = NULL; | |
4929 | finfo.sections = NULL; | |
4930 | finfo.symbuf = NULL; | |
9ad5cbcf | 4931 | finfo.symshndxbuf = NULL; |
252b5132 | 4932 | finfo.symbuf_count = 0; |
c97e73dd | 4933 | finfo.shndxbuf_size = 0; |
13ae64f3 JJ |
4934 | finfo.first_tls_sec = NULL; |
4935 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
4936 | if ((o->flags & SEC_THREAD_LOCAL) != 0 | |
4937 | && (o->flags & SEC_LOAD) != 0) | |
4938 | { | |
4939 | finfo.first_tls_sec = o; | |
4940 | break; | |
4941 | } | |
252b5132 RH |
4942 | |
4943 | /* Count up the number of relocations we will output for each output | |
4944 | section, so that we know the sizes of the reloc sections. We | |
4945 | also figure out some maximum sizes. */ | |
4946 | max_contents_size = 0; | |
4947 | max_external_reloc_size = 0; | |
4948 | max_internal_reloc_count = 0; | |
4949 | max_sym_count = 0; | |
9ad5cbcf | 4950 | max_sym_shndx_count = 0; |
b34976b6 | 4951 | merged = FALSE; |
252b5132 RH |
4952 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
4953 | { | |
3f9a32bd | 4954 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
252b5132 RH |
4955 | o->reloc_count = 0; |
4956 | ||
4957 | for (p = o->link_order_head; p != NULL; p = p->next) | |
4958 | { | |
3f9a32bd AM |
4959 | unsigned int reloc_count = 0; |
4960 | struct bfd_elf_section_data *esdi = NULL; | |
4961 | unsigned int *rel_count1; | |
4962 | ||
252b5132 RH |
4963 | if (p->type == bfd_section_reloc_link_order |
4964 | || p->type == bfd_symbol_reloc_link_order) | |
3f9a32bd | 4965 | reloc_count = 1; |
252b5132 RH |
4966 | else if (p->type == bfd_indirect_link_order) |
4967 | { | |
4968 | asection *sec; | |
4969 | ||
4970 | sec = p->u.indirect.section; | |
3f9a32bd | 4971 | esdi = elf_section_data (sec); |
252b5132 RH |
4972 | |
4973 | /* Mark all sections which are to be included in the | |
4974 | link. This will normally be every section. We need | |
4975 | to do this so that we can identify any sections which | |
4976 | the linker has decided to not include. */ | |
b34976b6 | 4977 | sec->linker_mark = TRUE; |
252b5132 | 4978 | |
f5fa8ca2 | 4979 | if (sec->flags & SEC_MERGE) |
b34976b6 | 4980 | merged = TRUE; |
f5fa8ca2 | 4981 | |
a712da20 | 4982 | if (info->relocateable || info->emitrelocations) |
3f9a32bd | 4983 | reloc_count = sec->reloc_count; |
c44233aa | 4984 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
4985 | { |
4986 | Elf_Internal_Rela * relocs; | |
4987 | ||
4988 | relocs = (NAME(_bfd_elf,link_read_relocs) | |
4989 | (abfd, sec, (PTR) NULL, | |
4990 | (Elf_Internal_Rela *) NULL, info->keep_memory)); | |
4991 | ||
3f9a32bd | 4992 | reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs); |
9317eacc | 4993 | |
6cdc0ccc | 4994 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
4995 | free (relocs); |
4996 | } | |
252b5132 RH |
4997 | |
4998 | if (sec->_raw_size > max_contents_size) | |
4999 | max_contents_size = sec->_raw_size; | |
5000 | if (sec->_cooked_size > max_contents_size) | |
5001 | max_contents_size = sec->_cooked_size; | |
5002 | ||
5003 | /* We are interested in just local symbols, not all | |
5004 | symbols. */ | |
5005 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
5006 | && (sec->owner->flags & DYNAMIC) == 0) | |
5007 | { | |
5008 | size_t sym_count; | |
5009 | ||
5010 | if (elf_bad_symtab (sec->owner)) | |
5011 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5012 | / sizeof (Elf_External_Sym)); | |
5013 | else | |
5014 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5015 | ||
5016 | if (sym_count > max_sym_count) | |
5017 | max_sym_count = sym_count; | |
5018 | ||
9ad5cbcf AM |
5019 | if (sym_count > max_sym_shndx_count |
5020 | && elf_symtab_shndx (sec->owner) != 0) | |
5021 | max_sym_shndx_count = sym_count; | |
5022 | ||
252b5132 RH |
5023 | if ((sec->flags & SEC_RELOC) != 0) |
5024 | { | |
5025 | size_t ext_size; | |
5026 | ||
5027 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
5028 | if (ext_size > max_external_reloc_size) | |
5029 | max_external_reloc_size = ext_size; | |
5030 | if (sec->reloc_count > max_internal_reloc_count) | |
5031 | max_internal_reloc_count = sec->reloc_count; | |
5032 | } | |
5033 | } | |
5034 | } | |
3f9a32bd AM |
5035 | |
5036 | if (reloc_count == 0) | |
5037 | continue; | |
5038 | ||
5039 | o->reloc_count += reloc_count; | |
5040 | ||
5041 | /* MIPS may have a mix of REL and RELA relocs on sections. | |
5042 | To support this curious ABI we keep reloc counts in | |
5043 | elf_section_data too. We must be careful to add the | |
5044 | relocations from the input section to the right output | |
5045 | count. FIXME: Get rid of one count. We have | |
5046 | o->reloc_count == esdo->rel_count + esdo->rel_count2. */ | |
5047 | rel_count1 = &esdo->rel_count; | |
5048 | if (esdi != NULL) | |
5049 | { | |
5050 | bfd_boolean same_size; | |
5051 | bfd_size_type entsize1; | |
5052 | ||
5053 | entsize1 = esdi->rel_hdr.sh_entsize; | |
5054 | BFD_ASSERT (entsize1 == sizeof (Elf_External_Rel) | |
5055 | || entsize1 == sizeof (Elf_External_Rela)); | |
5056 | same_size = (!o->use_rela_p | |
5057 | == (entsize1 == sizeof (Elf_External_Rel))); | |
5058 | ||
5059 | if (!same_size) | |
5060 | rel_count1 = &esdo->rel_count2; | |
5061 | ||
5062 | if (esdi->rel_hdr2 != NULL) | |
5063 | { | |
5064 | bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize; | |
5065 | unsigned int alt_count; | |
5066 | unsigned int *rel_count2; | |
5067 | ||
5068 | BFD_ASSERT (entsize2 != entsize1 | |
5069 | && (entsize2 == sizeof (Elf_External_Rel) | |
5070 | || entsize2 == sizeof (Elf_External_Rela))); | |
5071 | ||
5072 | rel_count2 = &esdo->rel_count2; | |
5073 | if (!same_size) | |
5074 | rel_count2 = &esdo->rel_count; | |
5075 | ||
5076 | /* The following is probably too simplistic if the | |
5077 | backend counts output relocs unusually. */ | |
5078 | BFD_ASSERT (bed->elf_backend_count_relocs == NULL); | |
5079 | alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2); | |
5080 | *rel_count2 += alt_count; | |
5081 | reloc_count -= alt_count; | |
5082 | } | |
5083 | } | |
5084 | *rel_count1 += reloc_count; | |
252b5132 RH |
5085 | } |
5086 | ||
5087 | if (o->reloc_count > 0) | |
5088 | o->flags |= SEC_RELOC; | |
5089 | else | |
5090 | { | |
5091 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5092 | set it (this is probably a bug) and if it is set | |
5093 | assign_section_numbers will create a reloc section. */ | |
5094 | o->flags &=~ SEC_RELOC; | |
5095 | } | |
5096 | ||
5097 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
5098 | zero. This is done in elf_fake_sections as well, but forcing | |
5099 | the VMA to 0 here will ensure that relocs against these | |
5100 | sections are handled correctly. */ | |
5101 | if ((o->flags & SEC_ALLOC) == 0 | |
5102 | && ! o->user_set_vma) | |
5103 | o->vma = 0; | |
5104 | } | |
5105 | ||
f5fa8ca2 JJ |
5106 | if (! info->relocateable && merged) |
5107 | elf_link_hash_traverse (elf_hash_table (info), | |
5108 | elf_link_sec_merge_syms, (PTR) abfd); | |
5109 | ||
252b5132 RH |
5110 | /* Figure out the file positions for everything but the symbol table |
5111 | and the relocs. We set symcount to force assign_section_numbers | |
5112 | to create a symbol table. */ | |
5113 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
5114 | BFD_ASSERT (! abfd->output_has_begun); | |
5115 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
5116 | goto error_return; | |
5117 | ||
5118 | /* That created the reloc sections. Set their sizes, and assign | |
5119 | them file positions, and allocate some buffers. */ | |
5120 | for (o = abfd->sections; o != NULL; o = o->next) | |
5121 | { | |
5122 | if ((o->flags & SEC_RELOC) != 0) | |
5123 | { | |
23bc299b MM |
5124 | if (!elf_link_size_reloc_section (abfd, |
5125 | &elf_section_data (o)->rel_hdr, | |
5126 | o)) | |
252b5132 RH |
5127 | goto error_return; |
5128 | ||
23bc299b MM |
5129 | if (elf_section_data (o)->rel_hdr2 |
5130 | && !elf_link_size_reloc_section (abfd, | |
5131 | elf_section_data (o)->rel_hdr2, | |
5132 | o)) | |
252b5132 | 5133 | goto error_return; |
252b5132 | 5134 | } |
b037af20 MM |
5135 | |
5136 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 5137 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
5138 | elf_section_data (o)->rel_count = 0; |
5139 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
5140 | } |
5141 | ||
5142 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
5143 | ||
5144 | /* We have now assigned file positions for all the sections except | |
5145 | .symtab and .strtab. We start the .symtab section at the current | |
5146 | file position, and write directly to it. We build the .strtab | |
5147 | section in memory. */ | |
5148 | bfd_get_symcount (abfd) = 0; | |
5149 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5150 | /* sh_name is set in prep_headers. */ | |
5151 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 5152 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
252b5132 RH |
5153 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
5154 | /* sh_link is set in assign_section_numbers. */ | |
5155 | /* sh_info is set below. */ | |
5156 | /* sh_offset is set just below. */ | |
f0e1d18a | 5157 | symtab_hdr->sh_addralign = bed->s->file_align; |
252b5132 RH |
5158 | |
5159 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 5160 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
5161 | |
5162 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5163 | incorrect. We do not yet know the size of the .symtab section. | |
5164 | We correct next_file_pos below, after we do know the size. */ | |
5165 | ||
5166 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5167 | continuously seeking to the right position in the file. */ | |
5168 | if (! info->keep_memory || max_sym_count < 20) | |
5169 | finfo.symbuf_size = 20; | |
5170 | else | |
5171 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
5172 | amt = finfo.symbuf_size; |
5173 | amt *= sizeof (Elf_External_Sym); | |
5174 | finfo.symbuf = (Elf_External_Sym *) bfd_malloc (amt); | |
252b5132 RH |
5175 | if (finfo.symbuf == NULL) |
5176 | goto error_return; | |
9ad5cbcf AM |
5177 | if (elf_numsections (abfd) > SHN_LORESERVE) |
5178 | { | |
c97e73dd AM |
5179 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
5180 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
5181 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 5182 | amt *= sizeof (Elf_External_Sym_Shndx); |
c97e73dd | 5183 | finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9ad5cbcf AM |
5184 | if (finfo.symshndxbuf == NULL) |
5185 | goto error_return; | |
5186 | } | |
252b5132 RH |
5187 | |
5188 | /* Start writing out the symbol table. The first symbol is always a | |
5189 | dummy symbol. */ | |
9317eacc CM |
5190 | if (info->strip != strip_all |
5191 | || emit_relocs) | |
252b5132 RH |
5192 | { |
5193 | elfsym.st_value = 0; | |
5194 | elfsym.st_size = 0; | |
5195 | elfsym.st_info = 0; | |
5196 | elfsym.st_other = 0; | |
5197 | elfsym.st_shndx = SHN_UNDEF; | |
5198 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5199 | &elfsym, bfd_und_section_ptr)) | |
5200 | goto error_return; | |
5201 | } | |
5202 | ||
5203 | #if 0 | |
5204 | /* Some standard ELF linkers do this, but we don't because it causes | |
5205 | bootstrap comparison failures. */ | |
5206 | /* Output a file symbol for the output file as the second symbol. | |
5207 | We output this even if we are discarding local symbols, although | |
5208 | I'm not sure if this is correct. */ | |
5209 | elfsym.st_value = 0; | |
5210 | elfsym.st_size = 0; | |
5211 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5212 | elfsym.st_other = 0; | |
5213 | elfsym.st_shndx = SHN_ABS; | |
5214 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
5215 | &elfsym, bfd_abs_section_ptr)) | |
5216 | goto error_return; | |
5217 | #endif | |
5218 | ||
5219 | /* Output a symbol for each section. We output these even if we are | |
5220 | discarding local symbols, since they are used for relocs. These | |
5221 | symbols have no names. We store the index of each one in the | |
5222 | index field of the section, so that we can find it again when | |
5223 | outputting relocs. */ | |
9317eacc CM |
5224 | if (info->strip != strip_all |
5225 | || emit_relocs) | |
252b5132 RH |
5226 | { |
5227 | elfsym.st_size = 0; | |
5228 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5229 | elfsym.st_other = 0; | |
9ad5cbcf | 5230 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5231 | { |
5232 | o = section_from_elf_index (abfd, i); | |
5233 | if (o != NULL) | |
5234 | o->target_index = bfd_get_symcount (abfd); | |
5235 | elfsym.st_shndx = i; | |
7ad34365 | 5236 | if (info->relocateable || o == NULL) |
252b5132 RH |
5237 | elfsym.st_value = 0; |
5238 | else | |
5239 | elfsym.st_value = o->vma; | |
5240 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5241 | &elfsym, o)) | |
5242 | goto error_return; | |
c97e73dd | 5243 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 5244 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
5245 | } |
5246 | } | |
5247 | ||
5248 | /* Allocate some memory to hold information read in from the input | |
5249 | files. */ | |
9ad5cbcf AM |
5250 | if (max_contents_size != 0) |
5251 | { | |
5252 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
5253 | if (finfo.contents == NULL) | |
5254 | goto error_return; | |
5255 | } | |
5256 | ||
5257 | if (max_external_reloc_size != 0) | |
5258 | { | |
5259 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
5260 | if (finfo.external_relocs == NULL) | |
5261 | goto error_return; | |
5262 | } | |
5263 | ||
5264 | if (max_internal_reloc_count != 0) | |
5265 | { | |
5266 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
5267 | amt *= sizeof (Elf_Internal_Rela); | |
5268 | finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); | |
5269 | if (finfo.internal_relocs == NULL) | |
5270 | goto error_return; | |
5271 | } | |
5272 | ||
5273 | if (max_sym_count != 0) | |
5274 | { | |
5275 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
5276 | finfo.external_syms = (Elf_External_Sym *) bfd_malloc (amt); | |
5277 | if (finfo.external_syms == NULL) | |
5278 | goto error_return; | |
5279 | ||
5280 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
5281 | finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); | |
5282 | if (finfo.internal_syms == NULL) | |
5283 | goto error_return; | |
5284 | ||
5285 | amt = max_sym_count * sizeof (long); | |
5286 | finfo.indices = (long *) bfd_malloc (amt); | |
5287 | if (finfo.indices == NULL) | |
5288 | goto error_return; | |
5289 | ||
5290 | amt = max_sym_count * sizeof (asection *); | |
5291 | finfo.sections = (asection **) bfd_malloc (amt); | |
5292 | if (finfo.sections == NULL) | |
5293 | goto error_return; | |
5294 | } | |
5295 | ||
5296 | if (max_sym_shndx_count != 0) | |
5297 | { | |
5298 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
5299 | finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
5300 | if (finfo.locsym_shndx == NULL) | |
5301 | goto error_return; | |
5302 | } | |
252b5132 | 5303 | |
13ae64f3 JJ |
5304 | if (finfo.first_tls_sec) |
5305 | { | |
5306 | unsigned int align = 0; | |
5307 | bfd_vma base = finfo.first_tls_sec->vma, end = 0; | |
5308 | asection *sec; | |
5309 | ||
5310 | for (sec = finfo.first_tls_sec; | |
5311 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
5312 | sec = sec->next) | |
5313 | { | |
5314 | bfd_vma size = sec->_raw_size; | |
5315 | ||
5316 | if (bfd_get_section_alignment (abfd, sec) > align) | |
5317 | align = bfd_get_section_alignment (abfd, sec); | |
5318 | if (sec->_raw_size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
5319 | { | |
5320 | struct bfd_link_order *o; | |
5321 | ||
5322 | size = 0; | |
5323 | for (o = sec->link_order_head; o != NULL; o = o->next) | |
5324 | if (size < o->offset + o->size) | |
58821868 | 5325 | size = o->offset + o->size; |
13ae64f3 JJ |
5326 | } |
5327 | end = sec->vma + size; | |
5328 | } | |
5329 | elf_hash_table (info)->tls_segment | |
5330 | = bfd_zalloc (abfd, sizeof (struct elf_link_tls_segment)); | |
5331 | if (elf_hash_table (info)->tls_segment == NULL) | |
5332 | goto error_return; | |
5333 | elf_hash_table (info)->tls_segment->start = base; | |
5334 | elf_hash_table (info)->tls_segment->size = end - base; | |
5335 | elf_hash_table (info)->tls_segment->align = align; | |
5336 | } | |
5337 | ||
252b5132 RH |
5338 | /* Since ELF permits relocations to be against local symbols, we |
5339 | must have the local symbols available when we do the relocations. | |
5340 | Since we would rather only read the local symbols once, and we | |
5341 | would rather not keep them in memory, we handle all the | |
5342 | relocations for a single input file at the same time. | |
5343 | ||
5344 | Unfortunately, there is no way to know the total number of local | |
5345 | symbols until we have seen all of them, and the local symbol | |
5346 | indices precede the global symbol indices. This means that when | |
5347 | we are generating relocateable output, and we see a reloc against | |
5348 | a global symbol, we can not know the symbol index until we have | |
5349 | finished examining all the local symbols to see which ones we are | |
5350 | going to output. To deal with this, we keep the relocations in | |
5351 | memory, and don't output them until the end of the link. This is | |
5352 | an unfortunate waste of memory, but I don't see a good way around | |
5353 | it. Fortunately, it only happens when performing a relocateable | |
5354 | link, which is not the common case. FIXME: If keep_memory is set | |
5355 | we could write the relocs out and then read them again; I don't | |
5356 | know how bad the memory loss will be. */ | |
5357 | ||
5358 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 5359 | sub->output_has_begun = FALSE; |
252b5132 RH |
5360 | for (o = abfd->sections; o != NULL; o = o->next) |
5361 | { | |
5362 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5363 | { | |
5364 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 5365 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 5366 | == bfd_target_elf_flavour) |
a50c1845 | 5367 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 5368 | { |
252b5132 RH |
5369 | if (! sub->output_has_begun) |
5370 | { | |
5371 | if (! elf_link_input_bfd (&finfo, sub)) | |
5372 | goto error_return; | |
b34976b6 | 5373 | sub->output_has_begun = TRUE; |
252b5132 RH |
5374 | } |
5375 | } | |
5376 | else if (p->type == bfd_section_reloc_link_order | |
5377 | || p->type == bfd_symbol_reloc_link_order) | |
5378 | { | |
5379 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5380 | goto error_return; | |
5381 | } | |
5382 | else | |
5383 | { | |
5384 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5385 | goto error_return; | |
5386 | } | |
5387 | } | |
5388 | } | |
5389 | ||
c44233aa AM |
5390 | /* Output any global symbols that got converted to local in a |
5391 | version script or due to symbol visibility. We do this in a | |
5392 | separate step since ELF requires all local symbols to appear | |
5393 | prior to any global symbols. FIXME: We should only do this if | |
5394 | some global symbols were, in fact, converted to become local. | |
5395 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 5396 | eoinfo.failed = FALSE; |
c44233aa | 5397 | eoinfo.finfo = &finfo; |
b34976b6 | 5398 | eoinfo.localsyms = TRUE; |
c44233aa AM |
5399 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5400 | (PTR) &eoinfo); | |
5401 | if (eoinfo.failed) | |
b34976b6 | 5402 | return FALSE; |
c44233aa | 5403 | |
252b5132 | 5404 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
5405 | with the global symbols. Even if we want to strip everything we |
5406 | can, we still need to deal with those global symbols that got | |
3e932841 | 5407 | converted to local in a version script. */ |
252b5132 | 5408 | |
30b30c21 | 5409 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 5410 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 5411 | |
fc8c40a0 AM |
5412 | if (dynamic |
5413 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
5414 | { |
5415 | Elf_Internal_Sym sym; | |
5416 | Elf_External_Sym *dynsym = | |
a7b97311 | 5417 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 5418 | long last_local = 0; |
30b30c21 RH |
5419 | |
5420 | /* Write out the section symbols for the output sections. */ | |
5421 | if (info->shared) | |
5422 | { | |
5423 | asection *s; | |
5424 | ||
5425 | sym.st_size = 0; | |
5426 | sym.st_name = 0; | |
5427 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5428 | sym.st_other = 0; | |
5429 | ||
5430 | for (s = abfd->sections; s != NULL; s = s->next) | |
5431 | { | |
5432 | int indx; | |
9ad5cbcf AM |
5433 | Elf_External_Sym *dest; |
5434 | ||
30b30c21 RH |
5435 | indx = elf_section_data (s)->this_idx; |
5436 | BFD_ASSERT (indx > 0); | |
5437 | sym.st_shndx = indx; | |
5438 | sym.st_value = s->vma; | |
9ad5cbcf AM |
5439 | dest = dynsym + elf_section_data (s)->dynindx; |
5440 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5441 | } |
5442 | ||
5443 | last_local = bfd_count_sections (abfd); | |
5444 | } | |
5445 | ||
5446 | /* Write out the local dynsyms. */ | |
5447 | if (elf_hash_table (info)->dynlocal) | |
5448 | { | |
5449 | struct elf_link_local_dynamic_entry *e; | |
5450 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
5451 | { | |
318da145 | 5452 | asection *s; |
9ad5cbcf | 5453 | Elf_External_Sym *dest; |
30b30c21 | 5454 | |
b037af20 MM |
5455 | sym.st_size = e->isym.st_size; |
5456 | sym.st_other = e->isym.st_other; | |
5457 | ||
1fa0ddb3 RH |
5458 | /* Copy the internal symbol as is. |
5459 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
5460 | the original st_name with the dynstr_index. */ |
5461 | sym = e->isym; | |
30b30c21 | 5462 | |
c8e5ddc8 | 5463 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
5464 | && (e->isym.st_shndx < SHN_LORESERVE |
5465 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
5466 | { |
5467 | s = bfd_section_from_elf_index (e->input_bfd, | |
5468 | e->isym.st_shndx); | |
5469 | ||
5470 | sym.st_shndx = | |
5471 | elf_section_data (s->output_section)->this_idx; | |
5472 | sym.st_value = (s->output_section->vma | |
5473 | + s->output_offset | |
5474 | + e->isym.st_value); | |
5475 | } | |
30b30c21 RH |
5476 | |
5477 | if (last_local < e->dynindx) | |
5478 | last_local = e->dynindx; | |
5479 | ||
9ad5cbcf AM |
5480 | dest = dynsym + e->dynindx; |
5481 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5482 | } |
5483 | } | |
5484 | ||
71a40b32 ILT |
5485 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
5486 | last_local + 1; | |
30b30c21 | 5487 | } |
252b5132 RH |
5488 | |
5489 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
5490 | eoinfo.failed = FALSE; |
5491 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
5492 | eoinfo.finfo = &finfo; |
5493 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
5494 | (PTR) &eoinfo); | |
5495 | if (eoinfo.failed) | |
b34976b6 | 5496 | return FALSE; |
252b5132 | 5497 | |
587ff49e RH |
5498 | /* If backend needs to output some symbols not present in the hash |
5499 | table, do it now. */ | |
5500 | if (bed->elf_backend_output_arch_syms) | |
5501 | { | |
b34976b6 AM |
5502 | typedef bfd_boolean (*out_sym_func) |
5503 | PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *)); | |
dc810e39 AM |
5504 | |
5505 | if (! ((*bed->elf_backend_output_arch_syms) | |
5506 | (abfd, info, (PTR) &finfo, (out_sym_func) elf_link_output_sym))) | |
b34976b6 | 5507 | return FALSE; |
3e932841 | 5508 | } |
587ff49e | 5509 | |
252b5132 RH |
5510 | /* Flush all symbols to the file. */ |
5511 | if (! elf_link_flush_output_syms (&finfo)) | |
b34976b6 | 5512 | return FALSE; |
252b5132 RH |
5513 | |
5514 | /* Now we know the size of the symtab section. */ | |
5515 | off += symtab_hdr->sh_size; | |
5516 | ||
c97e73dd AM |
5517 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
5518 | if (symtab_shndx_hdr->sh_name != 0) | |
5519 | { | |
5520 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
5521 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
5522 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
5523 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
5524 | symtab_shndx_hdr->sh_size = amt; | |
5525 | ||
5526 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 5527 | off, TRUE); |
c97e73dd AM |
5528 | |
5529 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
5530 | || (bfd_bwrite ((PTR) finfo.symshndxbuf, amt, abfd) != amt)) | |
b34976b6 | 5531 | return FALSE; |
c97e73dd AM |
5532 | } |
5533 | ||
5534 | ||
252b5132 RH |
5535 | /* Finish up and write out the symbol string table (.strtab) |
5536 | section. */ | |
5537 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5538 | /* sh_name was set in prep_headers. */ | |
5539 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5540 | symstrtab_hdr->sh_flags = 0; | |
5541 | symstrtab_hdr->sh_addr = 0; | |
5542 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
5543 | symstrtab_hdr->sh_entsize = 0; | |
5544 | symstrtab_hdr->sh_link = 0; | |
5545 | symstrtab_hdr->sh_info = 0; | |
5546 | /* sh_offset is set just below. */ | |
5547 | symstrtab_hdr->sh_addralign = 1; | |
5548 | ||
b34976b6 | 5549 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
5550 | elf_tdata (abfd)->next_file_pos = off; |
5551 | ||
5552 | if (bfd_get_symcount (abfd) > 0) | |
5553 | { | |
5554 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
5555 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 5556 | return FALSE; |
252b5132 RH |
5557 | } |
5558 | ||
5559 | /* Adjust the relocs to have the correct symbol indices. */ | |
5560 | for (o = abfd->sections; o != NULL; o = o->next) | |
5561 | { | |
252b5132 RH |
5562 | if ((o->flags & SEC_RELOC) == 0) |
5563 | continue; | |
5564 | ||
3e932841 | 5565 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
5566 | elf_section_data (o)->rel_count, |
5567 | elf_section_data (o)->rel_hashes); | |
5568 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
5569 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
5570 | elf_section_data (o)->rel_count2, | |
3e932841 | 5571 | (elf_section_data (o)->rel_hashes |
31367b81 | 5572 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
5573 | |
5574 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5575 | trying to swap the relocs out itself. */ | |
5576 | o->reloc_count = 0; | |
5577 | } | |
5578 | ||
db6751f2 JJ |
5579 | if (dynamic && info->combreloc && dynobj != NULL) |
5580 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
5581 | ||
252b5132 RH |
5582 | /* If we are linking against a dynamic object, or generating a |
5583 | shared library, finish up the dynamic linking information. */ | |
5584 | if (dynamic) | |
5585 | { | |
5586 | Elf_External_Dyn *dyncon, *dynconend; | |
5587 | ||
5588 | /* Fix up .dynamic entries. */ | |
5589 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5590 | BFD_ASSERT (o != NULL); | |
5591 | ||
5592 | dyncon = (Elf_External_Dyn *) o->contents; | |
5593 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5594 | for (; dyncon < dynconend; dyncon++) | |
5595 | { | |
5596 | Elf_Internal_Dyn dyn; | |
5597 | const char *name; | |
5598 | unsigned int type; | |
5599 | ||
5600 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5601 | ||
5602 | switch (dyn.d_tag) | |
5603 | { | |
5604 | default: | |
5605 | break; | |
db6751f2 JJ |
5606 | case DT_NULL: |
5607 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
5608 | { | |
5609 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
5610 | { | |
5611 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
5612 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
5613 | default: break; | |
5614 | } | |
5615 | if (dyn.d_tag != DT_NULL) | |
5616 | { | |
5617 | dyn.d_un.d_val = relativecount; | |
5618 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5619 | relativecount = 0; | |
5620 | } | |
5621 | } | |
5622 | break; | |
252b5132 | 5623 | case DT_INIT: |
f0c2e336 | 5624 | name = info->init_function; |
252b5132 RH |
5625 | goto get_sym; |
5626 | case DT_FINI: | |
f0c2e336 | 5627 | name = info->fini_function; |
252b5132 RH |
5628 | get_sym: |
5629 | { | |
5630 | struct elf_link_hash_entry *h; | |
5631 | ||
5632 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 5633 | FALSE, FALSE, TRUE); |
252b5132 RH |
5634 | if (h != NULL |
5635 | && (h->root.type == bfd_link_hash_defined | |
5636 | || h->root.type == bfd_link_hash_defweak)) | |
5637 | { | |
5638 | dyn.d_un.d_val = h->root.u.def.value; | |
5639 | o = h->root.u.def.section; | |
5640 | if (o->output_section != NULL) | |
5641 | dyn.d_un.d_val += (o->output_section->vma | |
5642 | + o->output_offset); | |
5643 | else | |
5644 | { | |
5645 | /* The symbol is imported from another shared | |
5646 | library and does not apply to this one. */ | |
5647 | dyn.d_un.d_val = 0; | |
5648 | } | |
5649 | ||
5650 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5651 | } | |
5652 | } | |
5653 | break; | |
5654 | ||
30831527 RH |
5655 | case DT_PREINIT_ARRAYSZ: |
5656 | name = ".preinit_array"; | |
5657 | goto get_size; | |
5658 | case DT_INIT_ARRAYSZ: | |
5659 | name = ".init_array"; | |
5660 | goto get_size; | |
5661 | case DT_FINI_ARRAYSZ: | |
5662 | name = ".fini_array"; | |
5663 | get_size: | |
5664 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5665 | if (o == NULL) |
5666 | { | |
5667 | (*_bfd_error_handler) | |
5668 | (_("%s: could not find output section %s"), | |
5669 | bfd_get_filename (abfd), name); | |
5670 | goto error_return; | |
5671 | } | |
25e27870 L |
5672 | if (o->_raw_size == 0) |
5673 | (*_bfd_error_handler) | |
5674 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
5675 | dyn.d_un.d_val = o->_raw_size; |
5676 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5677 | break; | |
5678 | ||
5679 | case DT_PREINIT_ARRAY: | |
5680 | name = ".preinit_array"; | |
5681 | goto get_vma; | |
5682 | case DT_INIT_ARRAY: | |
5683 | name = ".init_array"; | |
5684 | goto get_vma; | |
5685 | case DT_FINI_ARRAY: | |
5686 | name = ".fini_array"; | |
5687 | goto get_vma; | |
5688 | ||
252b5132 RH |
5689 | case DT_HASH: |
5690 | name = ".hash"; | |
5691 | goto get_vma; | |
5692 | case DT_STRTAB: | |
5693 | name = ".dynstr"; | |
5694 | goto get_vma; | |
5695 | case DT_SYMTAB: | |
5696 | name = ".dynsym"; | |
5697 | goto get_vma; | |
5698 | case DT_VERDEF: | |
5699 | name = ".gnu.version_d"; | |
5700 | goto get_vma; | |
5701 | case DT_VERNEED: | |
5702 | name = ".gnu.version_r"; | |
5703 | goto get_vma; | |
5704 | case DT_VERSYM: | |
5705 | name = ".gnu.version"; | |
5706 | get_vma: | |
5707 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5708 | if (o == NULL) |
5709 | { | |
5710 | (*_bfd_error_handler) | |
5711 | (_("%s: could not find output section %s"), | |
5712 | bfd_get_filename (abfd), name); | |
5713 | goto error_return; | |
5714 | } | |
252b5132 RH |
5715 | dyn.d_un.d_ptr = o->vma; |
5716 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5717 | break; | |
5718 | ||
5719 | case DT_REL: | |
5720 | case DT_RELA: | |
5721 | case DT_RELSZ: | |
5722 | case DT_RELASZ: | |
5723 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5724 | type = SHT_REL; | |
5725 | else | |
5726 | type = SHT_RELA; | |
5727 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 5728 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5729 | { |
5730 | Elf_Internal_Shdr *hdr; | |
5731 | ||
5732 | hdr = elf_elfsections (abfd)[i]; | |
5733 | if (hdr->sh_type == type | |
5734 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5735 | { | |
5736 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5737 | dyn.d_un.d_val += hdr->sh_size; | |
5738 | else | |
5739 | { | |
5740 | if (dyn.d_un.d_val == 0 | |
5741 | || hdr->sh_addr < dyn.d_un.d_val) | |
5742 | dyn.d_un.d_val = hdr->sh_addr; | |
5743 | } | |
5744 | } | |
5745 | } | |
5746 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5747 | break; | |
5748 | } | |
5749 | } | |
5750 | } | |
5751 | ||
5752 | /* If we have created any dynamic sections, then output them. */ | |
5753 | if (dynobj != NULL) | |
5754 | { | |
5755 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5756 | goto error_return; | |
5757 | ||
5758 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5759 | { | |
5760 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
5761 | || o->_raw_size == 0 |
5762 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
5763 | continue; |
5764 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
5765 | { | |
5766 | /* At this point, we are only interested in sections | |
c44233aa | 5767 | created by elf_link_create_dynamic_sections. */ |
252b5132 RH |
5768 | continue; |
5769 | } | |
5770 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
5771 | != SHT_STRTAB) | |
5772 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
5773 | { | |
5774 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
5775 | o->contents, |
5776 | (file_ptr) o->output_offset, | |
252b5132 RH |
5777 | o->_raw_size)) |
5778 | goto error_return; | |
5779 | } | |
5780 | else | |
5781 | { | |
252b5132 | 5782 | /* The contents of the .dynstr section are actually in a |
c44233aa | 5783 | stringtab. */ |
252b5132 RH |
5784 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
5785 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
5786 | || ! _bfd_elf_strtab_emit (abfd, |
5787 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
5788 | goto error_return; |
5789 | } | |
5790 | } | |
5791 | } | |
5792 | ||
1126897b AM |
5793 | if (info->relocateable) |
5794 | { | |
b34976b6 | 5795 | bfd_boolean failed = FALSE; |
1126897b AM |
5796 | |
5797 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
5798 | if (failed) | |
5799 | goto error_return; | |
5800 | } | |
5801 | ||
252b5132 RH |
5802 | /* If we have optimized stabs strings, output them. */ |
5803 | if (elf_hash_table (info)->stab_info != NULL) | |
5804 | { | |
5805 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
5806 | goto error_return; | |
5807 | } | |
5808 | ||
126495ed | 5809 | if (info->eh_frame_hdr) |
65765700 | 5810 | { |
126495ed AM |
5811 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
5812 | goto error_return; | |
65765700 JJ |
5813 | } |
5814 | ||
252b5132 RH |
5815 | if (finfo.symstrtab != NULL) |
5816 | _bfd_stringtab_free (finfo.symstrtab); | |
5817 | if (finfo.contents != NULL) | |
5818 | free (finfo.contents); | |
5819 | if (finfo.external_relocs != NULL) | |
5820 | free (finfo.external_relocs); | |
5821 | if (finfo.internal_relocs != NULL) | |
5822 | free (finfo.internal_relocs); | |
5823 | if (finfo.external_syms != NULL) | |
5824 | free (finfo.external_syms); | |
9ad5cbcf AM |
5825 | if (finfo.locsym_shndx != NULL) |
5826 | free (finfo.locsym_shndx); | |
252b5132 RH |
5827 | if (finfo.internal_syms != NULL) |
5828 | free (finfo.internal_syms); | |
5829 | if (finfo.indices != NULL) | |
5830 | free (finfo.indices); | |
5831 | if (finfo.sections != NULL) | |
5832 | free (finfo.sections); | |
5833 | if (finfo.symbuf != NULL) | |
5834 | free (finfo.symbuf); | |
9ad5cbcf | 5835 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5836 | free (finfo.symshndxbuf); |
252b5132 RH |
5837 | for (o = abfd->sections; o != NULL; o = o->next) |
5838 | { | |
5839 | if ((o->flags & SEC_RELOC) != 0 | |
5840 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 5841 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
5842 | } |
5843 | ||
b34976b6 | 5844 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 5845 | |
b34976b6 | 5846 | return TRUE; |
252b5132 RH |
5847 | |
5848 | error_return: | |
5849 | if (finfo.symstrtab != NULL) | |
5850 | _bfd_stringtab_free (finfo.symstrtab); | |
5851 | if (finfo.contents != NULL) | |
5852 | free (finfo.contents); | |
5853 | if (finfo.external_relocs != NULL) | |
5854 | free (finfo.external_relocs); | |
5855 | if (finfo.internal_relocs != NULL) | |
5856 | free (finfo.internal_relocs); | |
5857 | if (finfo.external_syms != NULL) | |
5858 | free (finfo.external_syms); | |
9ad5cbcf AM |
5859 | if (finfo.locsym_shndx != NULL) |
5860 | free (finfo.locsym_shndx); | |
252b5132 RH |
5861 | if (finfo.internal_syms != NULL) |
5862 | free (finfo.internal_syms); | |
5863 | if (finfo.indices != NULL) | |
5864 | free (finfo.indices); | |
5865 | if (finfo.sections != NULL) | |
5866 | free (finfo.sections); | |
5867 | if (finfo.symbuf != NULL) | |
5868 | free (finfo.symbuf); | |
9ad5cbcf | 5869 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5870 | free (finfo.symshndxbuf); |
252b5132 RH |
5871 | for (o = abfd->sections; o != NULL; o = o->next) |
5872 | { | |
5873 | if ((o->flags & SEC_RELOC) != 0 | |
5874 | && elf_section_data (o)->rel_hashes != NULL) | |
5875 | free (elf_section_data (o)->rel_hashes); | |
5876 | } | |
5877 | ||
b34976b6 | 5878 | return FALSE; |
252b5132 RH |
5879 | } |
5880 | ||
5881 | /* Add a symbol to the output symbol table. */ | |
5882 | ||
b34976b6 | 5883 | static bfd_boolean |
252b5132 RH |
5884 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
5885 | struct elf_final_link_info *finfo; | |
5886 | const char *name; | |
5887 | Elf_Internal_Sym *elfsym; | |
5888 | asection *input_sec; | |
5889 | { | |
9ad5cbcf AM |
5890 | Elf_External_Sym *dest; |
5891 | Elf_External_Sym_Shndx *destshndx; | |
b34976b6 AM |
5892 | bfd_boolean (*output_symbol_hook) |
5893 | PARAMS ((bfd *, struct bfd_link_info *info, const char *, | |
5894 | Elf_Internal_Sym *, asection *)); | |
252b5132 RH |
5895 | |
5896 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5897 | elf_backend_link_output_symbol_hook; | |
5898 | if (output_symbol_hook != NULL) | |
5899 | { | |
5900 | if (! ((*output_symbol_hook) | |
5901 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
b34976b6 | 5902 | return FALSE; |
252b5132 RH |
5903 | } |
5904 | ||
5905 | if (name == (const char *) NULL || *name == '\0') | |
5906 | elfsym->st_name = 0; | |
5907 | else if (input_sec->flags & SEC_EXCLUDE) | |
5908 | elfsym->st_name = 0; | |
5909 | else | |
5910 | { | |
5911 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 5912 | name, TRUE, FALSE); |
252b5132 | 5913 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 5914 | return FALSE; |
252b5132 RH |
5915 | } |
5916 | ||
5917 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5918 | { | |
5919 | if (! elf_link_flush_output_syms (finfo)) | |
b34976b6 | 5920 | return FALSE; |
252b5132 RH |
5921 | } |
5922 | ||
9ad5cbcf AM |
5923 | dest = finfo->symbuf + finfo->symbuf_count; |
5924 | destshndx = finfo->symshndxbuf; | |
5925 | if (destshndx != NULL) | |
c97e73dd AM |
5926 | { |
5927 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
5928 | { | |
5929 | bfd_size_type amt; | |
252b5132 | 5930 | |
c97e73dd AM |
5931 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
5932 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
5933 | if (destshndx == NULL) | |
b34976b6 | 5934 | return FALSE; |
c97e73dd AM |
5935 | memset ((char *) destshndx + amt, 0, amt); |
5936 | finfo->shndxbuf_size *= 2; | |
5937 | } | |
5938 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
5939 | } | |
5940 | ||
5941 | elf_swap_symbol_out (finfo->output_bfd, elfsym, (PTR) dest, (PTR) destshndx); | |
5942 | finfo->symbuf_count += 1; | |
5943 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 5944 | |
b34976b6 | 5945 | return TRUE; |
252b5132 RH |
5946 | } |
5947 | ||
5948 | /* Flush the output symbols to the file. */ | |
5949 | ||
b34976b6 | 5950 | static bfd_boolean |
252b5132 RH |
5951 | elf_link_flush_output_syms (finfo) |
5952 | struct elf_final_link_info *finfo; | |
5953 | { | |
5954 | if (finfo->symbuf_count > 0) | |
5955 | { | |
9ad5cbcf | 5956 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
5957 | file_ptr pos; |
5958 | bfd_size_type amt; | |
252b5132 | 5959 | |
9ad5cbcf AM |
5960 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
5961 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
5962 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
5963 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
5964 | || bfd_bwrite ((PTR) finfo->symbuf, amt, finfo->output_bfd) != amt) | |
b34976b6 | 5965 | return FALSE; |
252b5132 | 5966 | |
9ad5cbcf | 5967 | hdr->sh_size += amt; |
252b5132 RH |
5968 | finfo->symbuf_count = 0; |
5969 | } | |
5970 | ||
b34976b6 | 5971 | return TRUE; |
252b5132 RH |
5972 | } |
5973 | ||
f5fa8ca2 JJ |
5974 | /* Adjust all external symbols pointing into SEC_MERGE sections |
5975 | to reflect the object merging within the sections. */ | |
5976 | ||
b34976b6 | 5977 | static bfd_boolean |
f5fa8ca2 JJ |
5978 | elf_link_sec_merge_syms (h, data) |
5979 | struct elf_link_hash_entry *h; | |
5980 | PTR data; | |
5981 | { | |
5982 | asection *sec; | |
5983 | ||
e92d460e AM |
5984 | if (h->root.type == bfd_link_hash_warning) |
5985 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5986 | ||
f5fa8ca2 JJ |
5987 | if ((h->root.type == bfd_link_hash_defined |
5988 | || h->root.type == bfd_link_hash_defweak) | |
5989 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
68bfbfcc | 5990 | && sec->sec_info_type == ELF_INFO_TYPE_MERGE) |
f5fa8ca2 JJ |
5991 | { |
5992 | bfd *output_bfd = (bfd *) data; | |
5993 | ||
5994 | h->root.u.def.value = | |
5995 | _bfd_merged_section_offset (output_bfd, | |
5996 | &h->root.u.def.section, | |
65765700 | 5997 | elf_section_data (sec)->sec_info, |
f5fa8ca2 JJ |
5998 | h->root.u.def.value, (bfd_vma) 0); |
5999 | } | |
6000 | ||
b34976b6 | 6001 | return TRUE; |
f5fa8ca2 JJ |
6002 | } |
6003 | ||
f5d44ba0 AM |
6004 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
6005 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
6006 | versioned symbol that would normally require an explicit version. */ | |
6007 | ||
b34976b6 | 6008 | static bfd_boolean |
f5d44ba0 AM |
6009 | elf_link_check_versioned_symbol (info, h) |
6010 | struct bfd_link_info *info; | |
6011 | struct elf_link_hash_entry *h; | |
6012 | { | |
6013 | bfd *undef_bfd = h->root.u.undef.abfd; | |
6014 | struct elf_link_loaded_list *loaded; | |
f5d44ba0 AM |
6015 | |
6016 | if ((undef_bfd->flags & DYNAMIC) == 0 | |
6017 | || info->hash->creator->flavour != bfd_target_elf_flavour | |
6018 | || elf_dt_soname (h->root.u.undef.abfd) == NULL) | |
b34976b6 | 6019 | return FALSE; |
f5d44ba0 AM |
6020 | |
6021 | for (loaded = elf_hash_table (info)->loaded; | |
6022 | loaded != NULL; | |
6023 | loaded = loaded->next) | |
6024 | { | |
6025 | bfd *input; | |
6026 | Elf_Internal_Shdr *hdr; | |
6027 | bfd_size_type symcount; | |
6028 | bfd_size_type extsymcount; | |
6029 | bfd_size_type extsymoff; | |
6030 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
6031 | Elf_Internal_Sym *isym; |
6032 | Elf_Internal_Sym *isymend; | |
6033 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 6034 | Elf_External_Versym *ever; |
6cdc0ccc | 6035 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
6036 | |
6037 | input = loaded->abfd; | |
6038 | ||
6039 | /* We check each DSO for a possible hidden versioned definition. */ | |
6040 | if (input == undef_bfd | |
6041 | || (input->flags & DYNAMIC) == 0 | |
6042 | || elf_dynversym (input) == 0) | |
6043 | continue; | |
6044 | ||
6045 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
6046 | ||
6047 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
6048 | if (elf_bad_symtab (input)) | |
6049 | { | |
6050 | extsymcount = symcount; | |
6051 | extsymoff = 0; | |
6052 | } | |
6053 | else | |
6054 | { | |
6055 | extsymcount = symcount - hdr->sh_info; | |
6056 | extsymoff = hdr->sh_info; | |
6057 | } | |
6058 | ||
6059 | if (extsymcount == 0) | |
6060 | continue; | |
6061 | ||
6cdc0ccc AM |
6062 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
6063 | NULL, NULL, NULL); | |
6064 | if (isymbuf == NULL) | |
b34976b6 | 6065 | return FALSE; |
f5d44ba0 | 6066 | |
f5d44ba0 AM |
6067 | /* Read in any version definitions. */ |
6068 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
6069 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
6070 | if (extversym == NULL) | |
6071 | goto error_ret; | |
6072 | ||
6073 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
6074 | || (bfd_bread ((PTR) extversym, versymhdr->sh_size, input) | |
6075 | != versymhdr->sh_size)) | |
6076 | { | |
6077 | free (extversym); | |
6078 | error_ret: | |
6cdc0ccc | 6079 | free (isymbuf); |
b34976b6 | 6080 | return FALSE; |
f5d44ba0 AM |
6081 | } |
6082 | ||
6083 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
6084 | isymend = isymbuf + extsymcount; |
6085 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
6086 | { |
6087 | const char *name; | |
f5d44ba0 AM |
6088 | Elf_Internal_Versym iver; |
6089 | ||
6cdc0ccc AM |
6090 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
6091 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
6092 | continue; |
6093 | ||
6094 | name = bfd_elf_string_from_elf_section (input, | |
6095 | hdr->sh_link, | |
6cdc0ccc | 6096 | isym->st_name); |
f5d44ba0 AM |
6097 | if (strcmp (name, h->root.root.string) != 0) |
6098 | continue; | |
6099 | ||
6100 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
6101 | ||
6102 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
6103 | { | |
6104 | /* If we have a non-hidden versioned sym, then it should | |
6105 | have provided a definition for the undefined sym. */ | |
6106 | abort (); | |
6107 | } | |
6108 | ||
6109 | if ((iver.vs_vers & VERSYM_VERSION) == 2) | |
6110 | { | |
6111 | /* This is the oldest (default) sym. We can use it. */ | |
6112 | free (extversym); | |
6cdc0ccc | 6113 | free (isymbuf); |
b34976b6 | 6114 | return TRUE; |
f5d44ba0 AM |
6115 | } |
6116 | } | |
6117 | ||
6118 | free (extversym); | |
6cdc0ccc | 6119 | free (isymbuf); |
f5d44ba0 AM |
6120 | } |
6121 | ||
b34976b6 | 6122 | return FALSE; |
f5d44ba0 AM |
6123 | } |
6124 | ||
252b5132 RH |
6125 | /* Add an external symbol to the symbol table. This is called from |
6126 | the hash table traversal routine. When generating a shared object, | |
6127 | we go through the symbol table twice. The first time we output | |
6128 | anything that might have been forced to local scope in a version | |
6129 | script. The second time we output the symbols that are still | |
6130 | global symbols. */ | |
6131 | ||
b34976b6 | 6132 | static bfd_boolean |
252b5132 RH |
6133 | elf_link_output_extsym (h, data) |
6134 | struct elf_link_hash_entry *h; | |
6135 | PTR data; | |
6136 | { | |
6137 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; | |
6138 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
b34976b6 | 6139 | bfd_boolean strip; |
252b5132 RH |
6140 | Elf_Internal_Sym sym; |
6141 | asection *input_sec; | |
6142 | ||
e92d460e AM |
6143 | if (h->root.type == bfd_link_hash_warning) |
6144 | { | |
6145 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6146 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 6147 | return TRUE; |
e92d460e AM |
6148 | } |
6149 | ||
252b5132 RH |
6150 | /* Decide whether to output this symbol in this pass. */ |
6151 | if (eoinfo->localsyms) | |
6152 | { | |
6153 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6154 | return TRUE; |
252b5132 RH |
6155 | } |
6156 | else | |
6157 | { | |
6158 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 6159 | return TRUE; |
252b5132 RH |
6160 | } |
6161 | ||
6162 | /* If we are not creating a shared library, and this symbol is | |
6163 | referenced by a shared library but is not defined anywhere, then | |
6164 | warn that it is undefined. If we do not do this, the runtime | |
6165 | linker will complain that the symbol is undefined when the | |
6166 | program is run. We don't have to worry about symbols that are | |
6167 | referenced by regular files, because we will already have issued | |
6168 | warnings for them. */ | |
6169 | if (! finfo->info->relocateable | |
ae9a127f | 6170 | && (! finfo->info->shared || ! finfo->info->allow_shlib_undefined) |
252b5132 RH |
6171 | && h->root.type == bfd_link_hash_undefined |
6172 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
f5d44ba0 AM |
6173 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
6174 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
252b5132 RH |
6175 | { |
6176 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6177 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
b34976b6 | 6178 | (asection *) NULL, (bfd_vma) 0, TRUE))) |
252b5132 | 6179 | { |
b34976b6 AM |
6180 | eoinfo->failed = TRUE; |
6181 | return FALSE; | |
252b5132 RH |
6182 | } |
6183 | } | |
6184 | ||
6185 | /* We don't want to output symbols that have never been mentioned by | |
6186 | a regular file, or that we have been told to strip. However, if | |
6187 | h->indx is set to -2, the symbol is used by a reloc and we must | |
6188 | output it. */ | |
6189 | if (h->indx == -2) | |
b34976b6 | 6190 | strip = FALSE; |
252b5132 RH |
6191 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
6192 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
6193 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
6194 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 6195 | strip = TRUE; |
75828352 AM |
6196 | else if (finfo->info->strip == strip_all) |
6197 | strip = TRUE; | |
6198 | else if (finfo->info->strip == strip_some | |
6199 | && bfd_hash_lookup (finfo->info->keep_hash, | |
6200 | h->root.root.string, FALSE, FALSE) == NULL) | |
6201 | strip = TRUE; | |
6202 | else if (finfo->info->strip_discarded | |
6203 | && (h->root.type == bfd_link_hash_defined | |
6204 | || h->root.type == bfd_link_hash_defweak) | |
6205 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 6206 | strip = TRUE; |
252b5132 | 6207 | else |
b34976b6 | 6208 | strip = FALSE; |
252b5132 RH |
6209 | |
6210 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
6211 | nothing else to do unless it is a forced local symbol. */ |
6212 | if (strip | |
6213 | && h->dynindx == -1 | |
6214 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6215 | return TRUE; |
252b5132 RH |
6216 | |
6217 | sym.st_value = 0; | |
6218 | sym.st_size = h->size; | |
6219 | sym.st_other = h->other; | |
6220 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
6221 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
6222 | else if (h->root.type == bfd_link_hash_undefweak | |
6223 | || h->root.type == bfd_link_hash_defweak) | |
6224 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
6225 | else | |
6226 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6227 | ||
6228 | switch (h->root.type) | |
6229 | { | |
6230 | default: | |
6231 | case bfd_link_hash_new: | |
e92d460e | 6232 | case bfd_link_hash_warning: |
252b5132 | 6233 | abort (); |
b34976b6 | 6234 | return FALSE; |
252b5132 RH |
6235 | |
6236 | case bfd_link_hash_undefined: | |
252b5132 RH |
6237 | case bfd_link_hash_undefweak: |
6238 | input_sec = bfd_und_section_ptr; | |
6239 | sym.st_shndx = SHN_UNDEF; | |
6240 | break; | |
6241 | ||
6242 | case bfd_link_hash_defined: | |
6243 | case bfd_link_hash_defweak: | |
6244 | { | |
6245 | input_sec = h->root.u.def.section; | |
6246 | if (input_sec->output_section != NULL) | |
6247 | { | |
6248 | sym.st_shndx = | |
6249 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
6250 | input_sec->output_section); | |
9ad5cbcf | 6251 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
6252 | { |
6253 | (*_bfd_error_handler) | |
6254 | (_("%s: could not find output section %s for input section %s"), | |
6255 | bfd_get_filename (finfo->output_bfd), | |
6256 | input_sec->output_section->name, | |
6257 | input_sec->name); | |
b34976b6 AM |
6258 | eoinfo->failed = TRUE; |
6259 | return FALSE; | |
252b5132 RH |
6260 | } |
6261 | ||
6262 | /* ELF symbols in relocateable files are section relative, | |
6263 | but in nonrelocateable files they are virtual | |
6264 | addresses. */ | |
6265 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
6266 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6267 | { |
6268 | sym.st_value += input_sec->output_section->vma; | |
6269 | if (h->type == STT_TLS) | |
6270 | { | |
6271 | /* STT_TLS symbols are relative to PT_TLS segment | |
6272 | base. */ | |
6273 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6274 | sym.st_value -= finfo->first_tls_sec->vma; | |
6275 | } | |
6276 | } | |
252b5132 RH |
6277 | } |
6278 | else | |
6279 | { | |
6280 | BFD_ASSERT (input_sec->owner == NULL | |
6281 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
6282 | sym.st_shndx = SHN_UNDEF; | |
6283 | input_sec = bfd_und_section_ptr; | |
6284 | } | |
6285 | } | |
6286 | break; | |
6287 | ||
6288 | case bfd_link_hash_common: | |
6289 | input_sec = h->root.u.c.p->section; | |
6290 | sym.st_shndx = SHN_COMMON; | |
6291 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
6292 | break; | |
6293 | ||
6294 | case bfd_link_hash_indirect: | |
6295 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
6296 | to the decorated version of the name. For example, if the |
6297 | symbol foo@@GNU_1.2 is the default, which should be used when | |
6298 | foo is used with no version, then we add an indirect symbol | |
6299 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
6300 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 6301 | return TRUE; |
252b5132 RH |
6302 | } |
6303 | ||
6304 | /* Give the processor backend a chance to tweak the symbol value, | |
6305 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
6306 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
6307 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
6308 | if ((h->dynindx != -1 |
6309 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
c44233aa AM |
6310 | && (finfo->info->shared |
6311 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
6312 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
6313 | { | |
6314 | struct elf_backend_data *bed; | |
6315 | ||
6316 | bed = get_elf_backend_data (finfo->output_bfd); | |
6317 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
6318 | (finfo->output_bfd, finfo->info, h, &sym))) | |
6319 | { | |
b34976b6 AM |
6320 | eoinfo->failed = TRUE; |
6321 | return FALSE; | |
252b5132 RH |
6322 | } |
6323 | } | |
6324 | ||
6325 | /* If we are marking the symbol as undefined, and there are no | |
6326 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
6327 | mark the symbol as weak undefined; if there are non-weak |
6328 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
6329 | because it might not be marked as undefined until the |
6330 | finish_dynamic_symbol routine gets through with it. */ | |
6331 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 6332 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
6333 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
6334 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
6335 | { |
6336 | int bindtype; | |
6337 | ||
6338 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
6339 | bindtype = STB_GLOBAL; | |
6340 | else | |
6341 | bindtype = STB_WEAK; | |
6342 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
6343 | } | |
252b5132 | 6344 | |
7c25b72c | 6345 | /* If a symbol is not defined locally, we clear the visibility field. */ |
2cd533b7 L |
6346 | if (! finfo->info->relocateable |
6347 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
7c25b72c | 6348 | sym.st_other &= ~ ELF_ST_VISIBILITY (-1); |
32c092c3 | 6349 | |
252b5132 | 6350 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
6351 | there now. We already know the symbol index. We also fill in |
6352 | the entry in the .hash section. */ | |
252b5132 RH |
6353 | if (h->dynindx != -1 |
6354 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
6355 | { | |
6356 | size_t bucketcount; | |
6357 | size_t bucket; | |
c7ac6ff8 | 6358 | size_t hash_entry_size; |
252b5132 RH |
6359 | bfd_byte *bucketpos; |
6360 | bfd_vma chain; | |
dc810e39 | 6361 | Elf_External_Sym *esym; |
252b5132 RH |
6362 | |
6363 | sym.st_name = h->dynstr_index; | |
dc810e39 | 6364 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
9ad5cbcf | 6365 | elf_swap_symbol_out (finfo->output_bfd, &sym, (PTR) esym, (PTR) 0); |
252b5132 RH |
6366 | |
6367 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
6368 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 6369 | hash_entry_size |
c7ac6ff8 | 6370 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 6371 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
6372 | + (bucket + 2) * hash_entry_size); |
6373 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
dc810e39 AM |
6374 | bfd_put (8 * hash_entry_size, finfo->output_bfd, (bfd_vma) h->dynindx, |
6375 | bucketpos); | |
c7ac6ff8 MM |
6376 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
6377 | ((bfd_byte *) finfo->hash_sec->contents | |
6378 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
6379 | |
6380 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
6381 | { | |
6382 | Elf_Internal_Versym iversym; | |
dc810e39 | 6383 | Elf_External_Versym *eversym; |
252b5132 RH |
6384 | |
6385 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
6386 | { | |
6387 | if (h->verinfo.verdef == NULL) | |
6388 | iversym.vs_vers = 0; | |
6389 | else | |
6390 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
6391 | } | |
6392 | else | |
6393 | { | |
6394 | if (h->verinfo.vertree == NULL) | |
6395 | iversym.vs_vers = 1; | |
6396 | else | |
6397 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
6398 | } | |
6399 | ||
6400 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
6401 | iversym.vs_vers |= VERSYM_HIDDEN; | |
6402 | ||
dc810e39 AM |
6403 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
6404 | eversym += h->dynindx; | |
6405 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
6406 | } |
6407 | } | |
6408 | ||
6409 | /* If we're stripping it, then it was just a dynamic symbol, and | |
6410 | there's nothing else to do. */ | |
7330fb86 | 6411 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 6412 | return TRUE; |
252b5132 RH |
6413 | |
6414 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
6415 | ||
6416 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
6417 | { | |
b34976b6 AM |
6418 | eoinfo->failed = TRUE; |
6419 | return FALSE; | |
252b5132 RH |
6420 | } |
6421 | ||
b34976b6 | 6422 | return TRUE; |
252b5132 RH |
6423 | } |
6424 | ||
23bc299b MM |
6425 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which |
6426 | originated from the section given by INPUT_REL_HDR) to the | |
6427 | OUTPUT_BFD. */ | |
6428 | ||
b34976b6 | 6429 | static bfd_boolean |
3e932841 | 6430 | elf_link_output_relocs (output_bfd, input_section, input_rel_hdr, |
23bc299b MM |
6431 | internal_relocs) |
6432 | bfd *output_bfd; | |
6433 | asection *input_section; | |
6434 | Elf_Internal_Shdr *input_rel_hdr; | |
6435 | Elf_Internal_Rela *internal_relocs; | |
6436 | { | |
6437 | Elf_Internal_Rela *irela; | |
6438 | Elf_Internal_Rela *irelaend; | |
947216bf | 6439 | bfd_byte *erel; |
23bc299b MM |
6440 | Elf_Internal_Shdr *output_rel_hdr; |
6441 | asection *output_section; | |
7442e600 | 6442 | unsigned int *rel_countp = NULL; |
32f0787a | 6443 | struct elf_backend_data *bed; |
947216bf | 6444 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); |
23bc299b MM |
6445 | |
6446 | output_section = input_section->output_section; | |
6447 | output_rel_hdr = NULL; | |
6448 | ||
3e932841 | 6449 | if (elf_section_data (output_section)->rel_hdr.sh_entsize |
23bc299b MM |
6450 | == input_rel_hdr->sh_entsize) |
6451 | { | |
6452 | output_rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6453 | rel_countp = &elf_section_data (output_section)->rel_count; | |
6454 | } | |
6455 | else if (elf_section_data (output_section)->rel_hdr2 | |
6456 | && (elf_section_data (output_section)->rel_hdr2->sh_entsize | |
6457 | == input_rel_hdr->sh_entsize)) | |
6458 | { | |
6459 | output_rel_hdr = elf_section_data (output_section)->rel_hdr2; | |
6460 | rel_countp = &elf_section_data (output_section)->rel_count2; | |
6461 | } | |
41241523 TS |
6462 | else |
6463 | { | |
58821868 AM |
6464 | (*_bfd_error_handler) |
6465 | (_("%s: relocation size mismatch in %s section %s"), | |
6466 | bfd_get_filename (output_bfd), | |
6467 | bfd_archive_filename (input_section->owner), | |
6468 | input_section->name); | |
41241523 | 6469 | bfd_set_error (bfd_error_wrong_object_format); |
b34976b6 | 6470 | return FALSE; |
41241523 | 6471 | } |
32f0787a UC |
6472 | |
6473 | bed = get_elf_backend_data (output_bfd); | |
947216bf AM |
6474 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
6475 | swap_out = bed->s->swap_reloc_out; | |
6476 | else if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
6477 | swap_out = bed->s->swap_reloca_out; | |
6478 | else | |
6479 | abort (); | |
6480 | ||
6481 | erel = output_rel_hdr->contents; | |
6482 | erel += *rel_countp * input_rel_hdr->sh_entsize; | |
23bc299b | 6483 | irela = internal_relocs; |
58821868 AM |
6484 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) |
6485 | * bed->s->int_rels_per_ext_rel); | |
947216bf | 6486 | while (irela < irelaend) |
23bc299b | 6487 | { |
947216bf AM |
6488 | (*swap_out) (output_bfd, irela, erel); |
6489 | irela += bed->s->int_rels_per_ext_rel; | |
6490 | erel += input_rel_hdr->sh_entsize; | |
23bc299b MM |
6491 | } |
6492 | ||
6493 | /* Bump the counter, so that we know where to add the next set of | |
6494 | relocations. */ | |
d9bc7a44 | 6495 | *rel_countp += NUM_SHDR_ENTRIES (input_rel_hdr); |
41241523 | 6496 | |
b34976b6 | 6497 | return TRUE; |
23bc299b MM |
6498 | } |
6499 | ||
252b5132 RH |
6500 | /* Link an input file into the linker output file. This function |
6501 | handles all the sections and relocations of the input file at once. | |
6502 | This is so that we only have to read the local symbols once, and | |
6503 | don't have to keep them in memory. */ | |
6504 | ||
b34976b6 | 6505 | static bfd_boolean |
252b5132 RH |
6506 | elf_link_input_bfd (finfo, input_bfd) |
6507 | struct elf_final_link_info *finfo; | |
6508 | bfd *input_bfd; | |
6509 | { | |
b34976b6 AM |
6510 | bfd_boolean (*relocate_section) |
6511 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
6512 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
252b5132 RH |
6513 | bfd *output_bfd; |
6514 | Elf_Internal_Shdr *symtab_hdr; | |
6515 | size_t locsymcount; | |
6516 | size_t extsymoff; | |
6cdc0ccc | 6517 | Elf_Internal_Sym *isymbuf; |
252b5132 | 6518 | Elf_Internal_Sym *isym; |
6cdc0ccc | 6519 | Elf_Internal_Sym *isymend; |
252b5132 RH |
6520 | long *pindex; |
6521 | asection **ppsection; | |
6522 | asection *o; | |
c7ac6ff8 | 6523 | struct elf_backend_data *bed; |
b34976b6 | 6524 | bfd_boolean emit_relocs; |
f8deed93 | 6525 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
6526 | |
6527 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
6528 | bed = get_elf_backend_data (output_bfd); |
6529 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
6530 | |
6531 | /* If this is a dynamic object, we don't want to do anything here: | |
6532 | we don't want the local symbols, and we don't want the section | |
6533 | contents. */ | |
6534 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 6535 | return TRUE; |
252b5132 | 6536 | |
9317eacc | 6537 | emit_relocs = (finfo->info->relocateable |
c44233aa AM |
6538 | || finfo->info->emitrelocations |
6539 | || bed->elf_backend_emit_relocs); | |
9317eacc | 6540 | |
252b5132 RH |
6541 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
6542 | if (elf_bad_symtab (input_bfd)) | |
6543 | { | |
6544 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
6545 | extsymoff = 0; | |
6546 | } | |
6547 | else | |
6548 | { | |
6549 | locsymcount = symtab_hdr->sh_info; | |
6550 | extsymoff = symtab_hdr->sh_info; | |
6551 | } | |
6552 | ||
6553 | /* Read the local symbols. */ | |
6cdc0ccc AM |
6554 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
6555 | if (isymbuf == NULL && locsymcount != 0) | |
6556 | { | |
6557 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6558 | finfo->internal_syms, | |
6559 | finfo->external_syms, | |
6560 | finfo->locsym_shndx); | |
6561 | if (isymbuf == NULL) | |
b34976b6 | 6562 | return FALSE; |
252b5132 RH |
6563 | } |
6564 | ||
6cdc0ccc AM |
6565 | /* Find local symbol sections and adjust values of symbols in |
6566 | SEC_MERGE sections. Write out those local symbols we know are | |
6567 | going into the output file. */ | |
6568 | isymend = isymbuf + locsymcount; | |
6569 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
6570 | isym < isymend; | |
6571 | isym++, pindex++, ppsection++) | |
252b5132 RH |
6572 | { |
6573 | asection *isec; | |
6574 | const char *name; | |
6575 | Elf_Internal_Sym osym; | |
6576 | ||
252b5132 RH |
6577 | *pindex = -1; |
6578 | ||
6579 | if (elf_bad_symtab (input_bfd)) | |
6580 | { | |
6581 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
6582 | { | |
6583 | *ppsection = NULL; | |
6584 | continue; | |
6585 | } | |
6586 | } | |
6587 | ||
6588 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 6589 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
6590 | else if (isym->st_shndx < SHN_LORESERVE |
6591 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
6592 | { |
6593 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 | 6594 | if (isec |
68bfbfcc | 6595 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
6596 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
6597 | isym->st_value = | |
6598 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 6599 | elf_section_data (isec)->sec_info, |
f5fa8ca2 JJ |
6600 | isym->st_value, (bfd_vma) 0); |
6601 | } | |
252b5132 | 6602 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 6603 | isec = bfd_abs_section_ptr; |
252b5132 | 6604 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 6605 | isec = bfd_com_section_ptr; |
252b5132 RH |
6606 | else |
6607 | { | |
6608 | /* Who knows? */ | |
6609 | isec = NULL; | |
6610 | } | |
6611 | ||
6612 | *ppsection = isec; | |
6613 | ||
6614 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 6615 | if (ppsection == finfo->sections) |
252b5132 RH |
6616 | continue; |
6617 | ||
24376d1b AM |
6618 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
6619 | { | |
24376d1b AM |
6620 | /* We never output section symbols. Instead, we use the |
6621 | section symbol of the corresponding section in the output | |
6622 | file. */ | |
6623 | continue; | |
6624 | } | |
6625 | ||
252b5132 RH |
6626 | /* If we are stripping all symbols, we don't want to output this |
6627 | one. */ | |
6628 | if (finfo->info->strip == strip_all) | |
6629 | continue; | |
6630 | ||
252b5132 RH |
6631 | /* If we are discarding all local symbols, we don't want to |
6632 | output this one. If we are generating a relocateable output | |
6633 | file, then some of the local symbols may be required by | |
6634 | relocs; we output them below as we discover that they are | |
6635 | needed. */ | |
6636 | if (finfo->info->discard == discard_all) | |
6637 | continue; | |
6638 | ||
6639 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
6640 | discarding, we don't need to keep it, but note that |
6641 | linker_mark is only reliable for sections that have contents. | |
6642 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
6643 | as well as linker_mark. */ | |
9ad5cbcf | 6644 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
6645 | && isec != NULL |
6646 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
6647 | || (! finfo->info->relocateable | |
6648 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
6649 | continue; | |
6650 | ||
6651 | /* Get the name of the symbol. */ | |
6652 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6653 | isym->st_name); | |
6654 | if (name == NULL) | |
b34976b6 | 6655 | return FALSE; |
252b5132 RH |
6656 | |
6657 | /* See if we are discarding symbols with this name. */ | |
6658 | if ((finfo->info->strip == strip_some | |
b34976b6 | 6659 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 6660 | == NULL)) |
f5fa8ca2 JJ |
6661 | || (((finfo->info->discard == discard_sec_merge |
6662 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocateable) | |
6663 | || finfo->info->discard == discard_l) | |
252b5132 RH |
6664 | && bfd_is_local_label_name (input_bfd, name))) |
6665 | continue; | |
6666 | ||
6667 | /* If we get here, we are going to output this symbol. */ | |
6668 | ||
6669 | osym = *isym; | |
6670 | ||
6671 | /* Adjust the section index for the output file. */ | |
6672 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
6673 | isec->output_section); | |
9ad5cbcf | 6674 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 6675 | return FALSE; |
252b5132 RH |
6676 | |
6677 | *pindex = bfd_get_symcount (output_bfd); | |
6678 | ||
6679 | /* ELF symbols in relocateable files are section relative, but | |
6680 | in executable files they are virtual addresses. Note that | |
6681 | this code assumes that all ELF sections have an associated | |
6682 | BFD section with a reasonable value for output_offset; below | |
6683 | we assume that they also have a reasonable value for | |
6684 | output_section. Any special sections must be set up to meet | |
6685 | these requirements. */ | |
6686 | osym.st_value += isec->output_offset; | |
6687 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6688 | { |
6689 | osym.st_value += isec->output_section->vma; | |
6690 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
6691 | { | |
6692 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
6693 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6694 | osym.st_value -= finfo->first_tls_sec->vma; | |
6695 | } | |
6696 | } | |
252b5132 RH |
6697 | |
6698 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
b34976b6 | 6699 | return FALSE; |
252b5132 RH |
6700 | } |
6701 | ||
6702 | /* Relocate the contents of each section. */ | |
f8deed93 | 6703 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
6704 | for (o = input_bfd->sections; o != NULL; o = o->next) |
6705 | { | |
6706 | bfd_byte *contents; | |
6707 | ||
6708 | if (! o->linker_mark) | |
6709 | { | |
6710 | /* This section was omitted from the link. */ | |
6711 | continue; | |
6712 | } | |
6713 | ||
6714 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
6715 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
6716 | continue; | |
6717 | ||
6718 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
6719 | { | |
6720 | /* Section was created by elf_link_create_dynamic_sections | |
6721 | or somesuch. */ | |
6722 | continue; | |
6723 | } | |
6724 | ||
6725 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
6726 | relaxation routine. Note that o is a section in an input |
6727 | file, so the contents field will not have been set by any of | |
6728 | the routines which work on output files. */ | |
252b5132 RH |
6729 | if (elf_section_data (o)->this_hdr.contents != NULL) |
6730 | contents = elf_section_data (o)->this_hdr.contents; | |
6731 | else | |
6732 | { | |
6733 | contents = finfo->contents; | |
6734 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
6735 | (file_ptr) 0, o->_raw_size)) | |
b34976b6 | 6736 | return FALSE; |
252b5132 RH |
6737 | } |
6738 | ||
6739 | if ((o->flags & SEC_RELOC) != 0) | |
6740 | { | |
6741 | Elf_Internal_Rela *internal_relocs; | |
6742 | ||
6743 | /* Get the swapped relocs. */ | |
6744 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
6745 | (input_bfd, o, finfo->external_relocs, | |
b34976b6 | 6746 | finfo->internal_relocs, FALSE)); |
252b5132 RH |
6747 | if (internal_relocs == NULL |
6748 | && o->reloc_count > 0) | |
b34976b6 | 6749 | return FALSE; |
252b5132 | 6750 | |
ec338859 AM |
6751 | /* Run through the relocs looking for any against symbols |
6752 | from discarded sections and section symbols from | |
6753 | removed link-once sections. Complain about relocs | |
6754 | against discarded sections. Zero relocs against removed | |
126495ed | 6755 | link-once sections. */ |
73d074b4 DJ |
6756 | if (!finfo->info->relocateable |
6757 | && !elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
6758 | { |
6759 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 6760 | |
ec338859 AM |
6761 | rel = internal_relocs; |
6762 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
6763 | for ( ; rel < relend; rel++) | |
6764 | { | |
6765 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
6766 | ||
6767 | if (r_symndx >= locsymcount | |
6768 | || (elf_bad_symtab (input_bfd) | |
6769 | && finfo->sections[r_symndx] == NULL)) | |
6770 | { | |
6771 | struct elf_link_hash_entry *h; | |
6772 | ||
6773 | h = sym_hashes[r_symndx - extsymoff]; | |
6774 | while (h->root.type == bfd_link_hash_indirect | |
6775 | || h->root.type == bfd_link_hash_warning) | |
6776 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6777 | ||
6778 | /* Complain if the definition comes from a | |
6779 | discarded section. */ | |
6780 | if ((h->root.type == bfd_link_hash_defined | |
6781 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 6782 | && elf_discarded_section (h->root.u.def.section)) |
ec338859 | 6783 | { |
ec338859 AM |
6784 | if ((o->flags & SEC_DEBUGGING) != 0) |
6785 | { | |
45e9217a | 6786 | BFD_ASSERT (r_symndx != 0); |
f8deed93 | 6787 | memset (rel, 0, sizeof (*rel)); |
ec338859 AM |
6788 | } |
6789 | else | |
ec338859 AM |
6790 | { |
6791 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6792 | (finfo->info, h->root.root.string, | |
6793 | input_bfd, o, rel->r_offset, | |
b34976b6 AM |
6794 | TRUE))) |
6795 | return FALSE; | |
ec338859 AM |
6796 | } |
6797 | } | |
6798 | } | |
6799 | else | |
6800 | { | |
f9f32305 | 6801 | asection *sec = finfo->sections[r_symndx]; |
50b4d486 | 6802 | |
ed4de5e2 | 6803 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 6804 | { |
ad43ed4c L |
6805 | if ((o->flags & SEC_DEBUGGING) != 0 |
6806 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 6807 | { |
45e9217a | 6808 | BFD_ASSERT (r_symndx != 0); |
f9f32305 AM |
6809 | rel->r_info |
6810 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
6811 | rel->r_addend = 0; | |
6812 | } | |
6813 | else | |
f9f32305 | 6814 | { |
b34976b6 | 6815 | bfd_boolean ok; |
f9f32305 AM |
6816 | const char *msg |
6817 | = _("local symbols in discarded section %s"); | |
6818 | bfd_size_type amt | |
6819 | = strlen (sec->name) + strlen (msg) - 1; | |
6820 | char *buf = (char *) bfd_malloc (amt); | |
6821 | ||
6822 | if (buf != NULL) | |
6823 | sprintf (buf, msg, sec->name); | |
6824 | else | |
6825 | buf = (char *) sec->name; | |
6826 | ok = (*finfo->info->callbacks | |
6827 | ->undefined_symbol) (finfo->info, buf, | |
6828 | input_bfd, o, | |
6829 | rel->r_offset, | |
b34976b6 | 6830 | TRUE); |
f9f32305 AM |
6831 | if (buf != sec->name) |
6832 | free (buf); | |
6833 | if (!ok) | |
b34976b6 | 6834 | return FALSE; |
ec338859 AM |
6835 | } |
6836 | } | |
6837 | } | |
6838 | } | |
6839 | } | |
50b4d486 | 6840 | |
252b5132 RH |
6841 | /* Relocate the section by invoking a back end routine. |
6842 | ||
6843 | The back end routine is responsible for adjusting the | |
6844 | section contents as necessary, and (if using Rela relocs | |
6845 | and generating a relocateable output file) adjusting the | |
6846 | reloc addend as necessary. | |
6847 | ||
6848 | The back end routine does not have to worry about setting | |
6849 | the reloc address or the reloc symbol index. | |
6850 | ||
6851 | The back end routine is given a pointer to the swapped in | |
6852 | internal symbols, and can access the hash table entries | |
6853 | for the external symbols via elf_sym_hashes (input_bfd). | |
6854 | ||
6855 | When generating relocateable output, the back end routine | |
6856 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6857 | output symbol is going to be a section symbol | |
6858 | corresponding to the output section, which will require | |
6859 | the addend to be adjusted. */ | |
6860 | ||
6861 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6862 | input_bfd, o, contents, | |
6863 | internal_relocs, | |
6cdc0ccc | 6864 | isymbuf, |
252b5132 | 6865 | finfo->sections)) |
b34976b6 | 6866 | return FALSE; |
252b5132 | 6867 | |
9317eacc | 6868 | if (emit_relocs) |
252b5132 RH |
6869 | { |
6870 | Elf_Internal_Rela *irela; | |
6871 | Elf_Internal_Rela *irelaend; | |
73722af0 | 6872 | bfd_vma last_offset; |
252b5132 | 6873 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 6874 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 6875 | unsigned int next_erel; |
b34976b6 AM |
6876 | bfd_boolean (*reloc_emitter) |
6877 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, | |
6878 | Elf_Internal_Rela *)); | |
6879 | bfd_boolean rela_normal; | |
b491616a AM |
6880 | |
6881 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6882 | rela_normal = (bed->rela_normal | |
6883 | && (input_rel_hdr->sh_entsize | |
6884 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
6885 | |
6886 | /* Adjust the reloc addresses and symbol indices. */ | |
6887 | ||
6888 | irela = internal_relocs; | |
dc810e39 | 6889 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 6890 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
6891 | + elf_section_data (o->output_section)->rel_count |
6892 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 AM |
6893 | last_offset = o->output_offset; |
6894 | if (!finfo->info->relocateable) | |
6895 | last_offset += o->output_section->vma; | |
209f668e | 6896 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
6897 | { |
6898 | unsigned long r_symndx; | |
252b5132 | 6899 | asection *sec; |
fad2542d | 6900 | Elf_Internal_Sym sym; |
252b5132 | 6901 | |
209f668e NC |
6902 | if (next_erel == bed->s->int_rels_per_ext_rel) |
6903 | { | |
6904 | rel_hash++; | |
6905 | next_erel = 0; | |
6906 | } | |
6907 | ||
d6fe2dc1 AM |
6908 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
6909 | finfo->info, o, | |
6910 | irela->r_offset); | |
6911 | if (irela->r_offset >= (bfd_vma) -2) | |
6912 | { | |
73722af0 AM |
6913 | /* This is a reloc for a deleted entry or somesuch. |
6914 | Turn it into an R_*_NONE reloc, at the same | |
6915 | offset as the last reloc. elf_eh_frame.c and | |
6916 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 6917 | being ordered. */ |
73722af0 AM |
6918 | irela->r_offset = last_offset; |
6919 | irela->r_info = 0; | |
6920 | irela->r_addend = 0; | |
d6fe2dc1 AM |
6921 | continue; |
6922 | } | |
6923 | ||
252b5132 RH |
6924 | irela->r_offset += o->output_offset; |
6925 | ||
7ad34365 | 6926 | /* Relocs in an executable have to be virtual addresses. */ |
fd984e46 | 6927 | if (!finfo->info->relocateable) |
7ad34365 NC |
6928 | irela->r_offset += o->output_section->vma; |
6929 | ||
73722af0 | 6930 | last_offset = irela->r_offset; |
252b5132 | 6931 | |
73722af0 AM |
6932 | r_symndx = ELF_R_SYM (irela->r_info); |
6933 | if (r_symndx == STN_UNDEF) | |
252b5132 RH |
6934 | continue; |
6935 | ||
6936 | if (r_symndx >= locsymcount | |
6937 | || (elf_bad_symtab (input_bfd) | |
6938 | && finfo->sections[r_symndx] == NULL)) | |
6939 | { | |
6940 | struct elf_link_hash_entry *rh; | |
209f668e | 6941 | unsigned long indx; |
252b5132 RH |
6942 | |
6943 | /* This is a reloc against a global symbol. We | |
6944 | have not yet output all the local symbols, so | |
6945 | we do not know the symbol index of any global | |
6946 | symbol. We set the rel_hash entry for this | |
6947 | reloc to point to the global hash table entry | |
6948 | for this symbol. The symbol index is then | |
6949 | set at the end of elf_bfd_final_link. */ | |
6950 | indx = r_symndx - extsymoff; | |
6951 | rh = elf_sym_hashes (input_bfd)[indx]; | |
6952 | while (rh->root.type == bfd_link_hash_indirect | |
6953 | || rh->root.type == bfd_link_hash_warning) | |
6954 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
6955 | ||
6956 | /* Setting the index to -2 tells | |
6957 | elf_link_output_extsym that this symbol is | |
6958 | used by a reloc. */ | |
6959 | BFD_ASSERT (rh->indx < 0); | |
6960 | rh->indx = -2; | |
6961 | ||
6962 | *rel_hash = rh; | |
6963 | ||
6964 | continue; | |
6965 | } | |
6966 | ||
3e932841 | 6967 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
6968 | |
6969 | *rel_hash = NULL; | |
fad2542d | 6970 | sym = isymbuf[r_symndx]; |
252b5132 | 6971 | sec = finfo->sections[r_symndx]; |
fad2542d | 6972 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
6973 | { |
6974 | /* I suppose the backend ought to fill in the | |
6975 | section of any STT_SECTION symbol against a | |
6976 | processor specific section. If we have | |
6977 | discarded a section, the output_section will | |
6978 | be the absolute section. */ | |
b491616a AM |
6979 | if (bfd_is_abs_section (sec) |
6980 | || (sec != NULL | |
6981 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
6982 | r_symndx = 0; |
6983 | else if (sec == NULL || sec->owner == NULL) | |
6984 | { | |
6985 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 6986 | return FALSE; |
252b5132 RH |
6987 | } |
6988 | else | |
6989 | { | |
6990 | r_symndx = sec->output_section->target_index; | |
6991 | BFD_ASSERT (r_symndx != 0); | |
6992 | } | |
b491616a AM |
6993 | |
6994 | /* Adjust the addend according to where the | |
f5d44ba0 | 6995 | section winds up in the output section. */ |
b491616a AM |
6996 | if (rela_normal) |
6997 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
6998 | } |
6999 | else | |
7000 | { | |
7001 | if (finfo->indices[r_symndx] == -1) | |
7002 | { | |
dc810e39 | 7003 | unsigned long shlink; |
252b5132 RH |
7004 | const char *name; |
7005 | asection *osec; | |
7006 | ||
7007 | if (finfo->info->strip == strip_all) | |
7008 | { | |
7009 | /* You can't do ld -r -s. */ | |
7010 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 7011 | return FALSE; |
252b5132 RH |
7012 | } |
7013 | ||
7014 | /* This symbol was skipped earlier, but | |
7015 | since it is needed by a reloc, we | |
7016 | must output it now. */ | |
dc810e39 | 7017 | shlink = symtab_hdr->sh_link; |
a7b97311 | 7018 | name = (bfd_elf_string_from_elf_section |
fad2542d | 7019 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 7020 | if (name == NULL) |
b34976b6 | 7021 | return FALSE; |
252b5132 RH |
7022 | |
7023 | osec = sec->output_section; | |
fad2542d | 7024 | sym.st_shndx = |
252b5132 RH |
7025 | _bfd_elf_section_from_bfd_section (output_bfd, |
7026 | osec); | |
fad2542d | 7027 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 7028 | return FALSE; |
252b5132 | 7029 | |
fad2542d | 7030 | sym.st_value += sec->output_offset; |
252b5132 | 7031 | if (! finfo->info->relocateable) |
13ae64f3 | 7032 | { |
fad2542d AM |
7033 | sym.st_value += osec->vma; |
7034 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
7035 | { |
7036 | /* STT_TLS symbols are relative to PT_TLS | |
7037 | segment base. */ | |
7038 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
fad2542d | 7039 | sym.st_value -= finfo->first_tls_sec->vma; |
13ae64f3 JJ |
7040 | } |
7041 | } | |
252b5132 | 7042 | |
a7b97311 AM |
7043 | finfo->indices[r_symndx] |
7044 | = bfd_get_symcount (output_bfd); | |
252b5132 | 7045 | |
fad2542d | 7046 | if (! elf_link_output_sym (finfo, name, &sym, sec)) |
b34976b6 | 7047 | return FALSE; |
252b5132 RH |
7048 | } |
7049 | ||
7050 | r_symndx = finfo->indices[r_symndx]; | |
7051 | } | |
7052 | ||
7053 | irela->r_info = ELF_R_INFO (r_symndx, | |
7054 | ELF_R_TYPE (irela->r_info)); | |
7055 | } | |
7056 | ||
7057 | /* Swap out the relocs. */ | |
c44233aa AM |
7058 | if (bed->elf_backend_emit_relocs |
7059 | && !(finfo->info->relocateable | |
a7b97311 | 7060 | || finfo->info->emitrelocations)) |
c44233aa AM |
7061 | reloc_emitter = bed->elf_backend_emit_relocs; |
7062 | else | |
7063 | reloc_emitter = elf_link_output_relocs; | |
9317eacc | 7064 | |
c89583f8 AM |
7065 | if (input_rel_hdr->sh_size != 0 |
7066 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
7067 | internal_relocs)) | |
b34976b6 | 7068 | return FALSE; |
9317eacc | 7069 | |
c89583f8 AM |
7070 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
7071 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
7072 | { |
7073 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 7074 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 7075 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 7076 | internal_relocs)) |
b34976b6 | 7077 | return FALSE; |
c44233aa | 7078 | } |
252b5132 RH |
7079 | } |
7080 | } | |
7081 | ||
7082 | /* Write out the modified section contents. */ | |
73d074b4 | 7083 | if (bed->elf_backend_write_section |
f9f32305 | 7084 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
7085 | { |
7086 | /* Section written out. */ | |
7087 | } | |
68bfbfcc | 7088 | else switch (o->sec_info_type) |
f5fa8ca2 | 7089 | { |
65765700 | 7090 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 7091 | if (! (_bfd_write_section_stabs |
65765700 JJ |
7092 | (output_bfd, |
7093 | &elf_hash_table (finfo->info)->stab_info, | |
7094 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 7095 | return FALSE; |
65765700 JJ |
7096 | break; |
7097 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
7098 | if (! _bfd_write_merged_section (output_bfd, o, |
7099 | elf_section_data (o)->sec_info)) | |
b34976b6 | 7100 | return FALSE; |
65765700 JJ |
7101 | break; |
7102 | case ELF_INFO_TYPE_EH_FRAME: | |
7103 | { | |
126495ed AM |
7104 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
7105 | o, contents)) | |
b34976b6 | 7106 | return FALSE; |
65765700 JJ |
7107 | } |
7108 | break; | |
7109 | default: | |
7110 | { | |
7111 | bfd_size_type sec_size; | |
7112 | ||
7113 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
7114 | if (! (o->flags & SEC_EXCLUDE) | |
7115 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
7116 | contents, | |
7117 | (file_ptr) o->output_offset, | |
7118 | sec_size)) | |
b34976b6 | 7119 | return FALSE; |
65765700 JJ |
7120 | } |
7121 | break; | |
252b5132 RH |
7122 | } |
7123 | } | |
7124 | ||
b34976b6 | 7125 | return TRUE; |
252b5132 RH |
7126 | } |
7127 | ||
7128 | /* Generate a reloc when linking an ELF file. This is a reloc | |
7129 | requested by the linker, and does come from any input file. This | |
7130 | is used to build constructor and destructor tables when linking | |
7131 | with -Ur. */ | |
7132 | ||
b34976b6 | 7133 | static bfd_boolean |
252b5132 RH |
7134 | elf_reloc_link_order (output_bfd, info, output_section, link_order) |
7135 | bfd *output_bfd; | |
7136 | struct bfd_link_info *info; | |
7137 | asection *output_section; | |
7138 | struct bfd_link_order *link_order; | |
7139 | { | |
7140 | reloc_howto_type *howto; | |
7141 | long indx; | |
7142 | bfd_vma offset; | |
7143 | bfd_vma addend; | |
7144 | struct elf_link_hash_entry **rel_hash_ptr; | |
7145 | Elf_Internal_Shdr *rel_hdr; | |
32f0787a | 7146 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
7147 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
7148 | bfd_byte *erel; | |
7149 | unsigned int i; | |
252b5132 RH |
7150 | |
7151 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
7152 | if (howto == NULL) | |
7153 | { | |
7154 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 7155 | return FALSE; |
252b5132 RH |
7156 | } |
7157 | ||
7158 | addend = link_order->u.reloc.p->addend; | |
7159 | ||
7160 | /* Figure out the symbol index. */ | |
7161 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
7162 | + elf_section_data (output_section)->rel_count |
7163 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
7164 | if (link_order->type == bfd_section_reloc_link_order) |
7165 | { | |
7166 | indx = link_order->u.reloc.p->u.section->target_index; | |
7167 | BFD_ASSERT (indx != 0); | |
7168 | *rel_hash_ptr = NULL; | |
7169 | } | |
7170 | else | |
7171 | { | |
7172 | struct elf_link_hash_entry *h; | |
7173 | ||
7174 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 7175 | actually against the section. */ |
252b5132 RH |
7176 | h = ((struct elf_link_hash_entry *) |
7177 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
7178 | link_order->u.reloc.p->u.name, | |
b34976b6 | 7179 | FALSE, FALSE, TRUE)); |
252b5132 RH |
7180 | if (h != NULL |
7181 | && (h->root.type == bfd_link_hash_defined | |
7182 | || h->root.type == bfd_link_hash_defweak)) | |
7183 | { | |
7184 | asection *section; | |
7185 | ||
7186 | section = h->root.u.def.section; | |
7187 | indx = section->output_section->target_index; | |
7188 | *rel_hash_ptr = NULL; | |
7189 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
7190 | addend here, but in practice it has already been added |
7191 | because it was passed to constructor_callback. */ | |
252b5132 RH |
7192 | addend += section->output_section->vma + section->output_offset; |
7193 | } | |
7194 | else if (h != NULL) | |
7195 | { | |
7196 | /* Setting the index to -2 tells elf_link_output_extsym that | |
7197 | this symbol is used by a reloc. */ | |
7198 | h->indx = -2; | |
7199 | *rel_hash_ptr = h; | |
7200 | indx = 0; | |
7201 | } | |
7202 | else | |
7203 | { | |
7204 | if (! ((*info->callbacks->unattached_reloc) | |
7205 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
7206 | (asection *) NULL, (bfd_vma) 0))) | |
b34976b6 | 7207 | return FALSE; |
252b5132 RH |
7208 | indx = 0; |
7209 | } | |
7210 | } | |
7211 | ||
7212 | /* If this is an inplace reloc, we must write the addend into the | |
7213 | object file. */ | |
7214 | if (howto->partial_inplace && addend != 0) | |
7215 | { | |
7216 | bfd_size_type size; | |
7217 | bfd_reloc_status_type rstat; | |
7218 | bfd_byte *buf; | |
b34976b6 | 7219 | bfd_boolean ok; |
dc810e39 | 7220 | const char *sym_name; |
252b5132 RH |
7221 | |
7222 | size = bfd_get_reloc_size (howto); | |
7223 | buf = (bfd_byte *) bfd_zmalloc (size); | |
7224 | if (buf == (bfd_byte *) NULL) | |
b34976b6 | 7225 | return FALSE; |
dc810e39 | 7226 | rstat = _bfd_relocate_contents (howto, output_bfd, (bfd_vma) addend, buf); |
252b5132 RH |
7227 | switch (rstat) |
7228 | { | |
7229 | case bfd_reloc_ok: | |
7230 | break; | |
dc810e39 | 7231 | |
252b5132 RH |
7232 | default: |
7233 | case bfd_reloc_outofrange: | |
7234 | abort (); | |
dc810e39 | 7235 | |
252b5132 | 7236 | case bfd_reloc_overflow: |
dc810e39 AM |
7237 | if (link_order->type == bfd_section_reloc_link_order) |
7238 | sym_name = bfd_section_name (output_bfd, | |
7239 | link_order->u.reloc.p->u.section); | |
7240 | else | |
7241 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 7242 | if (! ((*info->callbacks->reloc_overflow) |
dc810e39 AM |
7243 | (info, sym_name, howto->name, addend, |
7244 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
252b5132 RH |
7245 | { |
7246 | free (buf); | |
b34976b6 | 7247 | return FALSE; |
252b5132 RH |
7248 | } |
7249 | break; | |
7250 | } | |
7251 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
7252 | (file_ptr) link_order->offset, size); | |
7253 | free (buf); | |
7254 | if (! ok) | |
b34976b6 | 7255 | return FALSE; |
252b5132 RH |
7256 | } |
7257 | ||
7258 | /* The address of a reloc is relative to the section in a | |
7259 | relocateable file, and is a virtual address in an executable | |
7260 | file. */ | |
7261 | offset = link_order->offset; | |
7262 | if (! info->relocateable) | |
7263 | offset += output_section->vma; | |
7264 | ||
947216bf AM |
7265 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
7266 | { | |
7267 | irel[i].r_offset = offset; | |
7268 | irel[i].r_info = 0; | |
7269 | irel[i].r_addend = 0; | |
7270 | } | |
7271 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 7272 | |
947216bf AM |
7273 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
7274 | erel = rel_hdr->contents; | |
252b5132 RH |
7275 | if (rel_hdr->sh_type == SHT_REL) |
7276 | { | |
947216bf AM |
7277 | erel += (elf_section_data (output_section)->rel_count |
7278 | * sizeof (Elf_External_Rel)); | |
7279 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); | |
252b5132 RH |
7280 | } |
7281 | else | |
7282 | { | |
947216bf AM |
7283 | irel[0].r_addend = addend; |
7284 | erel += (elf_section_data (output_section)->rel_count | |
7285 | * sizeof (Elf_External_Rela)); | |
7286 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); | |
252b5132 RH |
7287 | } |
7288 | ||
0525d26e | 7289 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 7290 | |
b34976b6 | 7291 | return TRUE; |
252b5132 | 7292 | } |
252b5132 RH |
7293 | \f |
7294 | /* Allocate a pointer to live in a linker created section. */ | |
7295 | ||
b34976b6 | 7296 | bfd_boolean |
252b5132 RH |
7297 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) |
7298 | bfd *abfd; | |
7299 | struct bfd_link_info *info; | |
7300 | elf_linker_section_t *lsect; | |
7301 | struct elf_link_hash_entry *h; | |
7302 | const Elf_Internal_Rela *rel; | |
7303 | { | |
7304 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
7305 | elf_linker_section_pointers_t *linker_section_ptr; | |
dc810e39 AM |
7306 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7307 | bfd_size_type amt; | |
252b5132 RH |
7308 | |
7309 | BFD_ASSERT (lsect != NULL); | |
7310 | ||
a7b97311 | 7311 | /* Is this a global symbol? */ |
252b5132 RH |
7312 | if (h != NULL) |
7313 | { | |
a7b97311 | 7314 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7315 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, |
7316 | rel->r_addend, | |
7317 | lsect->which)) | |
b34976b6 | 7318 | return TRUE; |
252b5132 RH |
7319 | |
7320 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
7321 | /* Make sure this symbol is output as a dynamic symbol. */ | |
7322 | if (h->dynindx == -1) | |
7323 | { | |
7324 | if (! elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 7325 | return FALSE; |
252b5132 RH |
7326 | } |
7327 | ||
7328 | if (lsect->rel_section) | |
7329 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7330 | } | |
a7b97311 | 7331 | else |
252b5132 | 7332 | { |
a7b97311 | 7333 | /* Allocation of a pointer to a local symbol. */ |
252b5132 RH |
7334 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
7335 | ||
a7b97311 | 7336 | /* Allocate a table to hold the local symbols if first time. */ |
252b5132 RH |
7337 | if (!ptr) |
7338 | { | |
7339 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
7340 | register unsigned int i; | |
7341 | ||
dc810e39 AM |
7342 | amt = num_symbols; |
7343 | amt *= sizeof (elf_linker_section_pointers_t *); | |
7344 | ptr = (elf_linker_section_pointers_t **) bfd_alloc (abfd, amt); | |
252b5132 RH |
7345 | |
7346 | if (!ptr) | |
b34976b6 | 7347 | return FALSE; |
252b5132 RH |
7348 | |
7349 | elf_local_ptr_offsets (abfd) = ptr; | |
7350 | for (i = 0; i < num_symbols; i++) | |
a7b97311 | 7351 | ptr[i] = (elf_linker_section_pointers_t *) 0; |
252b5132 RH |
7352 | } |
7353 | ||
a7b97311 | 7354 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7355 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], |
7356 | rel->r_addend, | |
7357 | lsect->which)) | |
b34976b6 | 7358 | return TRUE; |
252b5132 RH |
7359 | |
7360 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
7361 | ||
7362 | if (info->shared) | |
7363 | { | |
7364 | /* If we are generating a shared object, we need to | |
7365 | output a R_<xxx>_RELATIVE reloc so that the | |
7366 | dynamic linker can adjust this GOT entry. */ | |
7367 | BFD_ASSERT (lsect->rel_section != NULL); | |
7368 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7369 | } | |
7370 | } | |
7371 | ||
a7b97311 AM |
7372 | /* Allocate space for a pointer in the linker section, and allocate |
7373 | a new pointer record from internal memory. */ | |
252b5132 | 7374 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
dc810e39 AM |
7375 | amt = sizeof (elf_linker_section_pointers_t); |
7376 | linker_section_ptr = (elf_linker_section_pointers_t *) bfd_alloc (abfd, amt); | |
252b5132 RH |
7377 | |
7378 | if (!linker_section_ptr) | |
b34976b6 | 7379 | return FALSE; |
252b5132 RH |
7380 | |
7381 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
7382 | linker_section_ptr->addend = rel->r_addend; | |
7383 | linker_section_ptr->which = lsect->which; | |
b34976b6 | 7384 | linker_section_ptr->written_address_p = FALSE; |
252b5132 RH |
7385 | *ptr_linker_section_ptr = linker_section_ptr; |
7386 | ||
7387 | #if 0 | |
7388 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) | |
7389 | { | |
a7b97311 AM |
7390 | linker_section_ptr->offset = (lsect->section->_raw_size |
7391 | - lsect->hole_size + (ARCH_SIZE / 8)); | |
252b5132 RH |
7392 | lsect->hole_offset += ARCH_SIZE / 8; |
7393 | lsect->sym_offset += ARCH_SIZE / 8; | |
a7b97311 | 7394 | if (lsect->sym_hash) |
252b5132 | 7395 | { |
a7b97311 | 7396 | /* Bump up symbol value if needed. */ |
252b5132 RH |
7397 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; |
7398 | #ifdef DEBUG | |
7399 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
7400 | lsect->sym_hash->root.root.string, | |
a7b97311 AM |
7401 | (long) ARCH_SIZE / 8, |
7402 | (long) lsect->sym_hash->root.u.def.value); | |
252b5132 RH |
7403 | #endif |
7404 | } | |
7405 | } | |
7406 | else | |
7407 | #endif | |
7408 | linker_section_ptr->offset = lsect->section->_raw_size; | |
7409 | ||
7410 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
7411 | ||
7412 | #ifdef DEBUG | |
a7b97311 AM |
7413 | fprintf (stderr, |
7414 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
7415 | lsect->name, (long) linker_section_ptr->offset, | |
7416 | (long) lsect->section->_raw_size); | |
252b5132 RH |
7417 | #endif |
7418 | ||
b34976b6 | 7419 | return TRUE; |
252b5132 | 7420 | } |
252b5132 RH |
7421 | \f |
7422 | #if ARCH_SIZE==64 | |
7423 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
7424 | #endif | |
7425 | #if ARCH_SIZE==32 | |
7426 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
7427 | #endif | |
7428 | ||
209f668e | 7429 | /* Fill in the address for a pointer generated in a linker section. */ |
252b5132 RH |
7430 | |
7431 | bfd_vma | |
a7b97311 AM |
7432 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, |
7433 | relocation, rel, relative_reloc) | |
252b5132 RH |
7434 | bfd *output_bfd; |
7435 | bfd *input_bfd; | |
7436 | struct bfd_link_info *info; | |
7437 | elf_linker_section_t *lsect; | |
7438 | struct elf_link_hash_entry *h; | |
7439 | bfd_vma relocation; | |
7440 | const Elf_Internal_Rela *rel; | |
7441 | int relative_reloc; | |
7442 | { | |
7443 | elf_linker_section_pointers_t *linker_section_ptr; | |
7444 | ||
7445 | BFD_ASSERT (lsect != NULL); | |
7446 | ||
a7b97311 | 7447 | if (h != NULL) |
252b5132 | 7448 | { |
a7b97311 AM |
7449 | /* Handle global symbol. */ |
7450 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section | |
7451 | (h->linker_section_pointer, | |
7452 | rel->r_addend, | |
7453 | lsect->which)); | |
252b5132 RH |
7454 | |
7455 | BFD_ASSERT (linker_section_ptr != NULL); | |
7456 | ||
7457 | if (! elf_hash_table (info)->dynamic_sections_created | |
7458 | || (info->shared | |
7459 | && info->symbolic | |
7460 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
7461 | { | |
7462 | /* This is actually a static link, or it is a | |
7463 | -Bsymbolic link and the symbol is defined | |
7464 | locally. We must initialize this entry in the | |
7465 | global section. | |
7466 | ||
7467 | When doing a dynamic link, we create a .rela.<xxx> | |
7468 | relocation entry to initialize the value. This | |
7469 | is done in the finish_dynamic_symbol routine. */ | |
7470 | if (!linker_section_ptr->written_address_p) | |
7471 | { | |
b34976b6 | 7472 | linker_section_ptr->written_address_p = TRUE; |
a7b97311 AM |
7473 | bfd_put_ptr (output_bfd, |
7474 | relocation + linker_section_ptr->addend, | |
7475 | (lsect->section->contents | |
7476 | + linker_section_ptr->offset)); | |
252b5132 RH |
7477 | } |
7478 | } | |
7479 | } | |
a7b97311 | 7480 | else |
252b5132 | 7481 | { |
a7b97311 | 7482 | /* Handle local symbol. */ |
252b5132 RH |
7483 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7484 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
7485 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
a7b97311 AM |
7486 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section |
7487 | (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
7488 | rel->r_addend, | |
7489 | lsect->which)); | |
252b5132 RH |
7490 | |
7491 | BFD_ASSERT (linker_section_ptr != NULL); | |
7492 | ||
a7b97311 | 7493 | /* Write out pointer if it hasn't been rewritten out before. */ |
252b5132 RH |
7494 | if (!linker_section_ptr->written_address_p) |
7495 | { | |
b34976b6 | 7496 | linker_section_ptr->written_address_p = TRUE; |
252b5132 RH |
7497 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, |
7498 | lsect->section->contents + linker_section_ptr->offset); | |
7499 | ||
7500 | if (info->shared) | |
7501 | { | |
7502 | asection *srel = lsect->rel_section; | |
947216bf AM |
7503 | Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; |
7504 | bfd_byte *erel; | |
209f668e NC |
7505 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
7506 | unsigned int i; | |
252b5132 | 7507 | |
a7b97311 AM |
7508 | /* We need to generate a relative reloc for the dynamic |
7509 | linker. */ | |
252b5132 | 7510 | if (!srel) |
a7b97311 AM |
7511 | { |
7512 | srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
7513 | lsect->rel_name); | |
7514 | lsect->rel_section = srel; | |
7515 | } | |
252b5132 RH |
7516 | |
7517 | BFD_ASSERT (srel != NULL); | |
7518 | ||
209f668e | 7519 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
947216bf AM |
7520 | { |
7521 | outrel[i].r_offset = (lsect->section->output_section->vma | |
7522 | + lsect->section->output_offset | |
7523 | + linker_section_ptr->offset); | |
7524 | outrel[i].r_info = 0; | |
7525 | outrel[i].r_addend = 0; | |
7526 | } | |
209f668e | 7527 | outrel[0].r_info = ELF_R_INFO (0, relative_reloc); |
947216bf AM |
7528 | erel = lsect->section->contents; |
7529 | erel += (elf_section_data (lsect->section)->rel_count++ | |
7530 | * sizeof (Elf_External_Rela)); | |
dc810e39 | 7531 | elf_swap_reloca_out (output_bfd, outrel, erel); |
252b5132 RH |
7532 | } |
7533 | } | |
7534 | } | |
7535 | ||
7536 | relocation = (lsect->section->output_offset | |
7537 | + linker_section_ptr->offset | |
7538 | - lsect->hole_offset | |
7539 | - lsect->sym_offset); | |
7540 | ||
7541 | #ifdef DEBUG | |
a7b97311 AM |
7542 | fprintf (stderr, |
7543 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
7544 | lsect->name, (long) relocation, (long) relocation); | |
252b5132 RH |
7545 | #endif |
7546 | ||
7547 | /* Subtract out the addend, because it will get added back in by the normal | |
7548 | processing. */ | |
7549 | return relocation - linker_section_ptr->addend; | |
7550 | } | |
7551 | \f | |
7552 | /* Garbage collect unused sections. */ | |
7553 | ||
b34976b6 | 7554 | static bfd_boolean elf_gc_mark |
58821868 AM |
7555 | PARAMS ((struct bfd_link_info *, asection *, |
7556 | asection * (*) (asection *, struct bfd_link_info *, | |
7557 | Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
7558 | Elf_Internal_Sym *))); | |
252b5132 | 7559 | |
b34976b6 | 7560 | static bfd_boolean elf_gc_sweep |
58821868 | 7561 | PARAMS ((struct bfd_link_info *, |
b34976b6 AM |
7562 | bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *, |
7563 | const Elf_Internal_Rela *))); | |
252b5132 | 7564 | |
b34976b6 | 7565 | static bfd_boolean elf_gc_sweep_symbol |
58821868 | 7566 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7567 | |
b34976b6 | 7568 | static bfd_boolean elf_gc_allocate_got_offsets |
58821868 | 7569 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7570 | |
b34976b6 | 7571 | static bfd_boolean elf_gc_propagate_vtable_entries_used |
58821868 | 7572 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7573 | |
b34976b6 | 7574 | static bfd_boolean elf_gc_smash_unused_vtentry_relocs |
58821868 | 7575 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7576 | |
7577 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
7578 | it and any sections in this section's group, and all the sections |
7579 | which define symbols to which it refers. */ | |
252b5132 | 7580 | |
b34976b6 AM |
7581 | typedef asection * (*gc_mark_hook_fn) |
7582 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
7583 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
7584 | ||
7585 | static bfd_boolean | |
252b5132 RH |
7586 | elf_gc_mark (info, sec, gc_mark_hook) |
7587 | struct bfd_link_info *info; | |
7588 | asection *sec; | |
b34976b6 | 7589 | gc_mark_hook_fn gc_mark_hook; |
252b5132 | 7590 | { |
b34976b6 | 7591 | bfd_boolean ret; |
dbb410c3 | 7592 | asection *group_sec; |
252b5132 RH |
7593 | |
7594 | sec->gc_mark = 1; | |
7595 | ||
dbb410c3 AM |
7596 | /* Mark all the sections in the group. */ |
7597 | group_sec = elf_section_data (sec)->next_in_group; | |
7598 | if (group_sec && !group_sec->gc_mark) | |
7599 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 7600 | return FALSE; |
252b5132 | 7601 | |
dbb410c3 | 7602 | /* Look through the section relocs. */ |
b34976b6 | 7603 | ret = TRUE; |
252b5132 RH |
7604 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
7605 | { | |
7606 | Elf_Internal_Rela *relstart, *rel, *relend; | |
7607 | Elf_Internal_Shdr *symtab_hdr; | |
7608 | struct elf_link_hash_entry **sym_hashes; | |
7609 | size_t nlocsyms; | |
7610 | size_t extsymoff; | |
252b5132 | 7611 | bfd *input_bfd = sec->owner; |
c7ac6ff8 | 7612 | struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 7613 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
7614 | |
7615 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
7616 | sym_hashes = elf_sym_hashes (input_bfd); | |
7617 | ||
7618 | /* Read the local symbols. */ | |
7619 | if (elf_bad_symtab (input_bfd)) | |
7620 | { | |
7621 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 7622 | extsymoff = 0; |
252b5132 RH |
7623 | } |
7624 | else | |
7625 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 7626 | |
6cdc0ccc AM |
7627 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
7628 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 7629 | { |
6cdc0ccc AM |
7630 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
7631 | NULL, NULL, NULL); | |
7632 | if (isym == NULL) | |
b34976b6 | 7633 | return FALSE; |
9ad5cbcf AM |
7634 | } |
7635 | ||
252b5132 RH |
7636 | /* Read the relocations. */ |
7637 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
6cdc0ccc | 7638 | (input_bfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
252b5132 RH |
7639 | info->keep_memory)); |
7640 | if (relstart == NULL) | |
7641 | { | |
b34976b6 | 7642 | ret = FALSE; |
252b5132 RH |
7643 | goto out1; |
7644 | } | |
c7ac6ff8 | 7645 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7646 | |
7647 | for (rel = relstart; rel < relend; rel++) | |
7648 | { | |
7649 | unsigned long r_symndx; | |
7650 | asection *rsec; | |
7651 | struct elf_link_hash_entry *h; | |
252b5132 RH |
7652 | |
7653 | r_symndx = ELF_R_SYM (rel->r_info); | |
7654 | if (r_symndx == 0) | |
7655 | continue; | |
7656 | ||
6cdc0ccc AM |
7657 | if (r_symndx >= nlocsyms |
7658 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
7659 | { |
7660 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 7661 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
7662 | } |
7663 | else | |
7664 | { | |
6cdc0ccc | 7665 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
7666 | } |
7667 | ||
7668 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
7669 | { |
7670 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
7671 | rsec->gc_mark = 1; | |
7672 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
7673 | { | |
b34976b6 | 7674 | ret = FALSE; |
b91afed7 AM |
7675 | goto out2; |
7676 | } | |
7677 | } | |
252b5132 RH |
7678 | } |
7679 | ||
7680 | out2: | |
6cdc0ccc | 7681 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
7682 | free (relstart); |
7683 | out1: | |
6cdc0ccc AM |
7684 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
7685 | { | |
7686 | if (! info->keep_memory) | |
7687 | free (isym); | |
7688 | else | |
7689 | symtab_hdr->contents = (unsigned char *) isym; | |
7690 | } | |
252b5132 RH |
7691 | } |
7692 | ||
7693 | return ret; | |
7694 | } | |
7695 | ||
7696 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
7697 | ||
b34976b6 AM |
7698 | typedef bfd_boolean (*gc_sweep_hook_fn) |
7699 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
7700 | const Elf_Internal_Rela *)); | |
7701 | ||
7702 | static bfd_boolean | |
252b5132 RH |
7703 | elf_gc_sweep (info, gc_sweep_hook) |
7704 | struct bfd_link_info *info; | |
b34976b6 | 7705 | gc_sweep_hook_fn gc_sweep_hook; |
252b5132 RH |
7706 | { |
7707 | bfd *sub; | |
7708 | ||
7709 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7710 | { | |
7711 | asection *o; | |
7712 | ||
f6af82bd AM |
7713 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
7714 | continue; | |
7715 | ||
252b5132 RH |
7716 | for (o = sub->sections; o != NULL; o = o->next) |
7717 | { | |
7718 | /* Keep special sections. Keep .debug sections. */ | |
7719 | if ((o->flags & SEC_LINKER_CREATED) | |
7720 | || (o->flags & SEC_DEBUGGING)) | |
7721 | o->gc_mark = 1; | |
7722 | ||
7723 | if (o->gc_mark) | |
7724 | continue; | |
7725 | ||
7726 | /* Skip sweeping sections already excluded. */ | |
7727 | if (o->flags & SEC_EXCLUDE) | |
7728 | continue; | |
7729 | ||
7730 | /* Since this is early in the link process, it is simple | |
7731 | to remove a section from the output. */ | |
7732 | o->flags |= SEC_EXCLUDE; | |
7733 | ||
7734 | /* But we also have to update some of the relocation | |
7735 | info we collected before. */ | |
7736 | if (gc_sweep_hook | |
7737 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
7738 | { | |
7739 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 7740 | bfd_boolean r; |
252b5132 RH |
7741 | |
7742 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
7743 | (o->owner, o, NULL, NULL, info->keep_memory)); | |
7744 | if (internal_relocs == NULL) | |
b34976b6 | 7745 | return FALSE; |
252b5132 | 7746 | |
3e932841 | 7747 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 7748 | |
6cdc0ccc | 7749 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
7750 | free (internal_relocs); |
7751 | ||
7752 | if (!r) | |
b34976b6 | 7753 | return FALSE; |
252b5132 RH |
7754 | } |
7755 | } | |
7756 | } | |
7757 | ||
7758 | /* Remove the symbols that were in the swept sections from the dynamic | |
7759 | symbol table. GCFIXME: Anyone know how to get them out of the | |
7760 | static symbol table as well? */ | |
7761 | { | |
7762 | int i = 0; | |
7763 | ||
7764 | elf_link_hash_traverse (elf_hash_table (info), | |
7765 | elf_gc_sweep_symbol, | |
7766 | (PTR) &i); | |
7767 | ||
7768 | elf_hash_table (info)->dynsymcount = i; | |
7769 | } | |
7770 | ||
b34976b6 | 7771 | return TRUE; |
252b5132 RH |
7772 | } |
7773 | ||
7774 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
7775 | ||
b34976b6 | 7776 | static bfd_boolean |
252b5132 RH |
7777 | elf_gc_sweep_symbol (h, idxptr) |
7778 | struct elf_link_hash_entry *h; | |
7779 | PTR idxptr; | |
7780 | { | |
7781 | int *idx = (int *) idxptr; | |
7782 | ||
e92d460e AM |
7783 | if (h->root.type == bfd_link_hash_warning) |
7784 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7785 | ||
252b5132 RH |
7786 | if (h->dynindx != -1 |
7787 | && ((h->root.type != bfd_link_hash_defined | |
7788 | && h->root.type != bfd_link_hash_defweak) | |
7789 | || h->root.u.def.section->gc_mark)) | |
7790 | h->dynindx = (*idx)++; | |
7791 | ||
b34976b6 | 7792 | return TRUE; |
252b5132 RH |
7793 | } |
7794 | ||
7795 | /* Propogate collected vtable information. This is called through | |
7796 | elf_link_hash_traverse. */ | |
7797 | ||
b34976b6 | 7798 | static bfd_boolean |
252b5132 RH |
7799 | elf_gc_propagate_vtable_entries_used (h, okp) |
7800 | struct elf_link_hash_entry *h; | |
7801 | PTR okp; | |
7802 | { | |
e92d460e AM |
7803 | if (h->root.type == bfd_link_hash_warning) |
7804 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7805 | ||
3e932841 | 7806 | /* Those that are not vtables. */ |
252b5132 | 7807 | if (h->vtable_parent == NULL) |
b34976b6 | 7808 | return TRUE; |
252b5132 RH |
7809 | |
7810 | /* Those vtables that do not have parents, we cannot merge. */ | |
7811 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 7812 | return TRUE; |
252b5132 RH |
7813 | |
7814 | /* If we've already been done, exit. */ | |
7815 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 7816 | return TRUE; |
252b5132 RH |
7817 | |
7818 | /* Make sure the parent's table is up to date. */ | |
7819 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
7820 | ||
7821 | if (h->vtable_entries_used == NULL) | |
7822 | { | |
7823 | /* None of this table's entries were referenced. Re-use the | |
7824 | parent's table. */ | |
7825 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
7826 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
7827 | } | |
7828 | else | |
7829 | { | |
7830 | size_t n; | |
b34976b6 | 7831 | bfd_boolean *cu, *pu; |
252b5132 RH |
7832 | |
7833 | /* Or the parent's entries into ours. */ | |
7834 | cu = h->vtable_entries_used; | |
b34976b6 | 7835 | cu[-1] = TRUE; |
252b5132 RH |
7836 | pu = h->vtable_parent->vtable_entries_used; |
7837 | if (pu != NULL) | |
7838 | { | |
c44233aa AM |
7839 | asection *sec = h->root.u.def.section; |
7840 | struct elf_backend_data *bed = get_elf_backend_data (sec->owner); | |
7841 | int file_align = bed->s->file_align; | |
0d1ea5c0 CM |
7842 | |
7843 | n = h->vtable_parent->vtable_entries_size / file_align; | |
374b596d | 7844 | while (n--) |
252b5132 | 7845 | { |
374b596d | 7846 | if (*pu) |
b34976b6 | 7847 | *cu = TRUE; |
374b596d NC |
7848 | pu++; |
7849 | cu++; | |
252b5132 RH |
7850 | } |
7851 | } | |
7852 | } | |
7853 | ||
b34976b6 | 7854 | return TRUE; |
252b5132 RH |
7855 | } |
7856 | ||
b34976b6 | 7857 | static bfd_boolean |
252b5132 RH |
7858 | elf_gc_smash_unused_vtentry_relocs (h, okp) |
7859 | struct elf_link_hash_entry *h; | |
7860 | PTR okp; | |
7861 | { | |
7862 | asection *sec; | |
7863 | bfd_vma hstart, hend; | |
7864 | Elf_Internal_Rela *relstart, *relend, *rel; | |
c7ac6ff8 | 7865 | struct elf_backend_data *bed; |
0d1ea5c0 | 7866 | int file_align; |
252b5132 | 7867 | |
e92d460e AM |
7868 | if (h->root.type == bfd_link_hash_warning) |
7869 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7870 | ||
252b5132 RH |
7871 | /* Take care of both those symbols that do not describe vtables as |
7872 | well as those that are not loaded. */ | |
7873 | if (h->vtable_parent == NULL) | |
b34976b6 | 7874 | return TRUE; |
252b5132 RH |
7875 | |
7876 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
7877 | || h->root.type == bfd_link_hash_defweak); | |
7878 | ||
7879 | sec = h->root.u.def.section; | |
7880 | hstart = h->root.u.def.value; | |
7881 | hend = hstart + h->size; | |
7882 | ||
7883 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
b34976b6 | 7884 | (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL, TRUE)); |
252b5132 | 7885 | if (!relstart) |
b34976b6 | 7886 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 7887 | bed = get_elf_backend_data (sec->owner); |
0d1ea5c0 CM |
7888 | file_align = bed->s->file_align; |
7889 | ||
c7ac6ff8 | 7890 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7891 | |
7892 | for (rel = relstart; rel < relend; ++rel) | |
7893 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
7894 | { | |
7895 | /* If the entry is in use, do nothing. */ | |
7896 | if (h->vtable_entries_used | |
7897 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
7898 | { | |
0d1ea5c0 | 7899 | bfd_vma entry = (rel->r_offset - hstart) / file_align; |
252b5132 RH |
7900 | if (h->vtable_entries_used[entry]) |
7901 | continue; | |
7902 | } | |
7903 | /* Otherwise, kill it. */ | |
7904 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
7905 | } | |
7906 | ||
b34976b6 | 7907 | return TRUE; |
252b5132 RH |
7908 | } |
7909 | ||
7910 | /* Do mark and sweep of unused sections. */ | |
7911 | ||
b34976b6 | 7912 | bfd_boolean |
252b5132 RH |
7913 | elf_gc_sections (abfd, info) |
7914 | bfd *abfd; | |
7915 | struct bfd_link_info *info; | |
7916 | { | |
b34976b6 | 7917 | bfd_boolean ok = TRUE; |
252b5132 RH |
7918 | bfd *sub; |
7919 | asection * (*gc_mark_hook) | |
1e2f5b6e | 7920 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
c44233aa | 7921 | struct elf_link_hash_entry *h, Elf_Internal_Sym *)); |
252b5132 RH |
7922 | |
7923 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
6d3e950b | 7924 | || info->relocateable || info->emitrelocations |
252b5132 | 7925 | || elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 7926 | return TRUE; |
252b5132 RH |
7927 | |
7928 | /* Apply transitive closure to the vtable entry usage info. */ | |
7929 | elf_link_hash_traverse (elf_hash_table (info), | |
7930 | elf_gc_propagate_vtable_entries_used, | |
7931 | (PTR) &ok); | |
7932 | if (!ok) | |
b34976b6 | 7933 | return FALSE; |
252b5132 RH |
7934 | |
7935 | /* Kill the vtable relocations that were not used. */ | |
7936 | elf_link_hash_traverse (elf_hash_table (info), | |
7937 | elf_gc_smash_unused_vtentry_relocs, | |
7938 | (PTR) &ok); | |
7939 | if (!ok) | |
b34976b6 | 7940 | return FALSE; |
252b5132 RH |
7941 | |
7942 | /* Grovel through relocs to find out who stays ... */ | |
7943 | ||
7944 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
7945 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7946 | { | |
7947 | asection *o; | |
f6af82bd AM |
7948 | |
7949 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
7950 | continue; | |
7951 | ||
252b5132 RH |
7952 | for (o = sub->sections; o != NULL; o = o->next) |
7953 | { | |
7954 | if (o->flags & SEC_KEEP) | |
c44233aa | 7955 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 7956 | return FALSE; |
252b5132 RH |
7957 | } |
7958 | } | |
7959 | ||
7960 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 7961 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 7962 | return FALSE; |
252b5132 | 7963 | |
b34976b6 | 7964 | return TRUE; |
252b5132 RH |
7965 | } |
7966 | \f | |
7967 | /* Called from check_relocs to record the existance of a VTINHERIT reloc. */ | |
7968 | ||
b34976b6 | 7969 | bfd_boolean |
252b5132 RH |
7970 | elf_gc_record_vtinherit (abfd, sec, h, offset) |
7971 | bfd *abfd; | |
7972 | asection *sec; | |
7973 | struct elf_link_hash_entry *h; | |
7974 | bfd_vma offset; | |
7975 | { | |
7976 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
7977 | struct elf_link_hash_entry **search, *child; | |
7978 | bfd_size_type extsymcount; | |
7979 | ||
7980 | /* The sh_info field of the symtab header tells us where the | |
7981 | external symbols start. We don't care about the local symbols at | |
7982 | this point. */ | |
7983 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
7984 | if (!elf_bad_symtab (abfd)) | |
7985 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
7986 | ||
7987 | sym_hashes = elf_sym_hashes (abfd); | |
7988 | sym_hashes_end = sym_hashes + extsymcount; | |
7989 | ||
7990 | /* Hunt down the child symbol, which is in this section at the same | |
7991 | offset as the relocation. */ | |
7992 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
7993 | { | |
7994 | if ((child = *search) != NULL | |
7995 | && (child->root.type == bfd_link_hash_defined | |
7996 | || child->root.type == bfd_link_hash_defweak) | |
7997 | && child->root.u.def.section == sec | |
7998 | && child->root.u.def.value == offset) | |
7999 | goto win; | |
8000 | } | |
8001 | ||
8002 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 8003 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 8004 | (unsigned long) offset); |
252b5132 | 8005 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 8006 | return FALSE; |
252b5132 | 8007 | |
dc810e39 | 8008 | win: |
252b5132 RH |
8009 | if (!h) |
8010 | { | |
8011 | /* This *should* only be the absolute section. It could potentially | |
8012 | be that someone has defined a non-global vtable though, which | |
8013 | would be bad. It isn't worth paging in the local symbols to be | |
8014 | sure though; that case should simply be handled by the assembler. */ | |
8015 | ||
8016 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
8017 | } | |
8018 | else | |
8019 | child->vtable_parent = h; | |
8020 | ||
b34976b6 | 8021 | return TRUE; |
252b5132 RH |
8022 | } |
8023 | ||
8024 | /* Called from check_relocs to record the existance of a VTENTRY reloc. */ | |
8025 | ||
b34976b6 | 8026 | bfd_boolean |
252b5132 | 8027 | elf_gc_record_vtentry (abfd, sec, h, addend) |
7442e600 ILT |
8028 | bfd *abfd ATTRIBUTE_UNUSED; |
8029 | asection *sec ATTRIBUTE_UNUSED; | |
252b5132 RH |
8030 | struct elf_link_hash_entry *h; |
8031 | bfd_vma addend; | |
8032 | { | |
0d1ea5c0 CM |
8033 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
8034 | int file_align = bed->s->file_align; | |
8035 | ||
252b5132 RH |
8036 | if (addend >= h->vtable_entries_size) |
8037 | { | |
8038 | size_t size, bytes; | |
b34976b6 | 8039 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
8040 | |
8041 | /* While the symbol is undefined, we have to be prepared to handle | |
8042 | a zero size. */ | |
8043 | if (h->root.type == bfd_link_hash_undefined) | |
8044 | size = addend; | |
8045 | else | |
8046 | { | |
8047 | size = h->size; | |
8048 | if (size < addend) | |
8049 | { | |
8050 | /* Oops! We've got a reference past the defined end of | |
8051 | the table. This is probably a bug -- shall we warn? */ | |
8052 | size = addend; | |
8053 | } | |
8054 | } | |
8055 | ||
8056 | /* Allocate one extra entry for use as a "done" flag for the | |
8057 | consolidation pass. */ | |
b34976b6 | 8058 | bytes = (size / file_align + 1) * sizeof (bfd_boolean); |
252b5132 RH |
8059 | |
8060 | if (ptr) | |
8061 | { | |
dc810e39 | 8062 | ptr = bfd_realloc (ptr - 1, (bfd_size_type) bytes); |
3e932841 | 8063 | |
fed79cc6 NC |
8064 | if (ptr != NULL) |
8065 | { | |
8066 | size_t oldbytes; | |
252b5132 | 8067 | |
a7b97311 | 8068 | oldbytes = ((h->vtable_entries_size / file_align + 1) |
b34976b6 | 8069 | * sizeof (bfd_boolean)); |
a7b97311 | 8070 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 8071 | } |
252b5132 RH |
8072 | } |
8073 | else | |
dc810e39 | 8074 | ptr = bfd_zmalloc ((bfd_size_type) bytes); |
252b5132 | 8075 | |
fed79cc6 | 8076 | if (ptr == NULL) |
b34976b6 | 8077 | return FALSE; |
3e932841 | 8078 | |
252b5132 | 8079 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 8080 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
8081 | h->vtable_entries_size = size; |
8082 | } | |
3e932841 | 8083 | |
b34976b6 | 8084 | h->vtable_entries_used[addend / file_align] = TRUE; |
252b5132 | 8085 | |
b34976b6 | 8086 | return TRUE; |
252b5132 RH |
8087 | } |
8088 | ||
8089 | /* And an accompanying bit to work out final got entry offsets once | |
8090 | we're done. Should be called from final_link. */ | |
8091 | ||
b34976b6 | 8092 | bfd_boolean |
252b5132 RH |
8093 | elf_gc_common_finalize_got_offsets (abfd, info) |
8094 | bfd *abfd; | |
8095 | struct bfd_link_info *info; | |
8096 | { | |
8097 | bfd *i; | |
8098 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8099 | bfd_vma gotoff; | |
8100 | ||
8101 | /* The GOT offset is relative to the .got section, but the GOT header is | |
8102 | put into the .got.plt section, if the backend uses it. */ | |
8103 | if (bed->want_got_plt) | |
8104 | gotoff = 0; | |
8105 | else | |
8106 | gotoff = bed->got_header_size; | |
8107 | ||
8108 | /* Do the local .got entries first. */ | |
8109 | for (i = info->input_bfds; i; i = i->link_next) | |
8110 | { | |
f6af82bd | 8111 | bfd_signed_vma *local_got; |
252b5132 RH |
8112 | bfd_size_type j, locsymcount; |
8113 | Elf_Internal_Shdr *symtab_hdr; | |
8114 | ||
f6af82bd AM |
8115 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
8116 | continue; | |
8117 | ||
8118 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
8119 | if (!local_got) |
8120 | continue; | |
8121 | ||
8122 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
8123 | if (elf_bad_symtab (i)) | |
8124 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
8125 | else | |
8126 | locsymcount = symtab_hdr->sh_info; | |
8127 | ||
8128 | for (j = 0; j < locsymcount; ++j) | |
8129 | { | |
8130 | if (local_got[j] > 0) | |
8131 | { | |
8132 | local_got[j] = gotoff; | |
8133 | gotoff += ARCH_SIZE / 8; | |
8134 | } | |
8135 | else | |
8136 | local_got[j] = (bfd_vma) -1; | |
8137 | } | |
8138 | } | |
8139 | ||
dd5724d5 AM |
8140 | /* Then the global .got entries. .plt refcounts are handled by |
8141 | adjust_dynamic_symbol */ | |
252b5132 RH |
8142 | elf_link_hash_traverse (elf_hash_table (info), |
8143 | elf_gc_allocate_got_offsets, | |
8144 | (PTR) &gotoff); | |
b34976b6 | 8145 | return TRUE; |
252b5132 RH |
8146 | } |
8147 | ||
8148 | /* We need a special top-level link routine to convert got reference counts | |
8149 | to real got offsets. */ | |
8150 | ||
b34976b6 | 8151 | static bfd_boolean |
252b5132 RH |
8152 | elf_gc_allocate_got_offsets (h, offarg) |
8153 | struct elf_link_hash_entry *h; | |
8154 | PTR offarg; | |
8155 | { | |
8156 | bfd_vma *off = (bfd_vma *) offarg; | |
8157 | ||
e92d460e AM |
8158 | if (h->root.type == bfd_link_hash_warning) |
8159 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8160 | ||
252b5132 RH |
8161 | if (h->got.refcount > 0) |
8162 | { | |
8163 | h->got.offset = off[0]; | |
8164 | off[0] += ARCH_SIZE / 8; | |
8165 | } | |
8166 | else | |
8167 | h->got.offset = (bfd_vma) -1; | |
8168 | ||
b34976b6 | 8169 | return TRUE; |
252b5132 RH |
8170 | } |
8171 | ||
8172 | /* Many folk need no more in the way of final link than this, once | |
8173 | got entry reference counting is enabled. */ | |
8174 | ||
b34976b6 | 8175 | bfd_boolean |
252b5132 RH |
8176 | elf_gc_common_final_link (abfd, info) |
8177 | bfd *abfd; | |
8178 | struct bfd_link_info *info; | |
8179 | { | |
8180 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 8181 | return FALSE; |
252b5132 RH |
8182 | |
8183 | /* Invoke the regular ELF backend linker to do all the work. */ | |
8184 | return elf_bfd_final_link (abfd, info); | |
8185 | } | |
8186 | ||
8187 | /* This function will be called though elf_link_hash_traverse to store | |
8188 | all hash value of the exported symbols in an array. */ | |
8189 | ||
b34976b6 | 8190 | static bfd_boolean |
252b5132 RH |
8191 | elf_collect_hash_codes (h, data) |
8192 | struct elf_link_hash_entry *h; | |
8193 | PTR data; | |
8194 | { | |
8195 | unsigned long **valuep = (unsigned long **) data; | |
8196 | const char *name; | |
8197 | char *p; | |
8198 | unsigned long ha; | |
8199 | char *alc = NULL; | |
8200 | ||
e92d460e AM |
8201 | if (h->root.type == bfd_link_hash_warning) |
8202 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8203 | ||
252b5132 RH |
8204 | /* Ignore indirect symbols. These are added by the versioning code. */ |
8205 | if (h->dynindx == -1) | |
b34976b6 | 8206 | return TRUE; |
252b5132 RH |
8207 | |
8208 | name = h->root.root.string; | |
8209 | p = strchr (name, ELF_VER_CHR); | |
8210 | if (p != NULL) | |
8211 | { | |
dc810e39 AM |
8212 | alc = bfd_malloc ((bfd_size_type) (p - name + 1)); |
8213 | memcpy (alc, name, (size_t) (p - name)); | |
252b5132 RH |
8214 | alc[p - name] = '\0'; |
8215 | name = alc; | |
8216 | } | |
8217 | ||
8218 | /* Compute the hash value. */ | |
8219 | ha = bfd_elf_hash (name); | |
8220 | ||
8221 | /* Store the found hash value in the array given as the argument. */ | |
8222 | *(*valuep)++ = ha; | |
8223 | ||
8224 | /* And store it in the struct so that we can put it in the hash table | |
8225 | later. */ | |
8226 | h->elf_hash_value = ha; | |
8227 | ||
8228 | if (alc != NULL) | |
8229 | free (alc); | |
8230 | ||
b34976b6 | 8231 | return TRUE; |
252b5132 | 8232 | } |
73d074b4 | 8233 | |
b34976b6 | 8234 | bfd_boolean |
73d074b4 DJ |
8235 | elf_reloc_symbol_deleted_p (offset, cookie) |
8236 | bfd_vma offset; | |
8237 | PTR cookie; | |
8238 | { | |
9ad5cbcf | 8239 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
73d074b4 DJ |
8240 | |
8241 | if (rcookie->bad_symtab) | |
8242 | rcookie->rel = rcookie->rels; | |
8243 | ||
8244 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
8245 | { | |
d6fe2dc1 | 8246 | unsigned long r_symndx; |
73d074b4 DJ |
8247 | |
8248 | if (! rcookie->bad_symtab) | |
8249 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 8250 | return FALSE; |
73d074b4 DJ |
8251 | if (rcookie->rel->r_offset != offset) |
8252 | continue; | |
8253 | ||
d6fe2dc1 AM |
8254 | r_symndx = ELF_R_SYM (rcookie->rel->r_info); |
8255 | if (r_symndx == SHN_UNDEF) | |
b34976b6 | 8256 | return TRUE; |
d6fe2dc1 | 8257 | |
73d074b4 | 8258 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 8259 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
8260 | { |
8261 | struct elf_link_hash_entry *h; | |
8262 | ||
8263 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
8264 | ||
8265 | while (h->root.type == bfd_link_hash_indirect | |
8266 | || h->root.type == bfd_link_hash_warning) | |
8267 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8268 | ||
8269 | if ((h->root.type == bfd_link_hash_defined | |
8270 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 8271 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 8272 | return TRUE; |
73d074b4 | 8273 | else |
b34976b6 | 8274 | return FALSE; |
73d074b4 | 8275 | } |
6cdc0ccc | 8276 | else |
73d074b4 DJ |
8277 | { |
8278 | /* It's not a relocation against a global symbol, | |
44421011 | 8279 | but it could be a relocation against a local |
73d074b4 DJ |
8280 | symbol for a discarded section. */ |
8281 | asection *isec; | |
6cdc0ccc | 8282 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
8283 | |
8284 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
8285 | isym = &rcookie->locsyms[r_symndx]; |
8286 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 8287 | { |
6cdc0ccc | 8288 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 8289 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 8290 | return TRUE; |
73d074b4 DJ |
8291 | } |
8292 | } | |
b34976b6 | 8293 | return FALSE; |
73d074b4 | 8294 | } |
b34976b6 | 8295 | return FALSE; |
73d074b4 DJ |
8296 | } |
8297 | ||
8298 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 8299 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 8300 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 8301 | which is true for all known assemblers. */ |
73d074b4 | 8302 | |
b34976b6 | 8303 | bfd_boolean |
65765700 JJ |
8304 | elf_bfd_discard_info (output_bfd, info) |
8305 | bfd *output_bfd; | |
73d074b4 DJ |
8306 | struct bfd_link_info *info; |
8307 | { | |
8308 | struct elf_reloc_cookie cookie; | |
126495ed | 8309 | asection *stab, *eh; |
73d074b4 | 8310 | Elf_Internal_Shdr *symtab_hdr; |
73d074b4 DJ |
8311 | struct elf_backend_data *bed; |
8312 | bfd *abfd; | |
99eb2ac8 | 8313 | unsigned int count; |
b34976b6 | 8314 | bfd_boolean ret = FALSE; |
73d074b4 | 8315 | |
d6fe2dc1 | 8316 | if (info->traditional_format |
73d074b4 | 8317 | || info->hash->creator->flavour != bfd_target_elf_flavour |
65765700 | 8318 | || ! is_elf_hash_table (info)) |
b34976b6 | 8319 | return FALSE; |
65765700 | 8320 | |
73d074b4 DJ |
8321 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
8322 | { | |
163c1c30 L |
8323 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
8324 | continue; | |
8325 | ||
73d074b4 DJ |
8326 | bed = get_elf_backend_data (abfd); |
8327 | ||
8328 | if ((abfd->flags & DYNAMIC) != 0) | |
8329 | continue; | |
8330 | ||
126495ed | 8331 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
2d36fe5f AH |
8332 | if (info->relocateable |
8333 | || (eh != NULL | |
8334 | && (eh->_raw_size == 0 | |
8335 | || bfd_is_abs_section (eh->output_section)))) | |
126495ed | 8336 | eh = NULL; |
65765700 | 8337 | |
99eb2ac8 AM |
8338 | stab = bfd_get_section_by_name (abfd, ".stab"); |
8339 | if (stab != NULL | |
8340 | && (stab->_raw_size == 0 | |
8341 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 8342 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
8343 | stab = NULL; |
8344 | ||
8345 | if (stab == NULL | |
8346 | && eh == NULL | |
8347 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
8348 | continue; |
8349 | ||
8350 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
8351 | cookie.abfd = abfd; |
8352 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
8353 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
8354 | if (cookie.bad_symtab) | |
8355 | { | |
99eb2ac8 | 8356 | cookie.locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); |
73d074b4 DJ |
8357 | cookie.extsymoff = 0; |
8358 | } | |
8359 | else | |
8360 | { | |
8361 | cookie.locsymcount = symtab_hdr->sh_info; | |
8362 | cookie.extsymoff = symtab_hdr->sh_info; | |
8363 | } | |
8364 | ||
6cdc0ccc AM |
8365 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
8366 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 8367 | { |
6cdc0ccc AM |
8368 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
8369 | cookie.locsymcount, 0, | |
8370 | NULL, NULL, NULL); | |
c44233aa | 8371 | if (cookie.locsyms == NULL) |
b34976b6 | 8372 | return FALSE; |
9ad5cbcf | 8373 | } |
73d074b4 | 8374 | |
99eb2ac8 | 8375 | if (stab != NULL) |
73d074b4 | 8376 | { |
99eb2ac8 AM |
8377 | cookie.rels = NULL; |
8378 | count = stab->reloc_count; | |
8379 | if (count != 0) | |
8380 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) | |
8381 | (abfd, stab, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
8382 | info->keep_memory)); | |
8383 | if (cookie.rels != NULL) | |
73d074b4 DJ |
8384 | { |
8385 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
8386 | cookie.relend = cookie.rels; |
8387 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
8388 | if (_bfd_discard_section_stabs (abfd, stab, |
8389 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
8390 | elf_reloc_symbol_deleted_p, |
8391 | &cookie)) | |
b34976b6 | 8392 | ret = TRUE; |
6cdc0ccc | 8393 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
8394 | free (cookie.rels); |
8395 | } | |
8396 | } | |
8397 | ||
99eb2ac8 | 8398 | if (eh != NULL) |
65765700 JJ |
8399 | { |
8400 | cookie.rels = NULL; | |
99eb2ac8 AM |
8401 | count = eh->reloc_count; |
8402 | if (count != 0) | |
65765700 | 8403 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) |
40b829d4 | 8404 | (abfd, eh, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
65765700 | 8405 | info->keep_memory)); |
99eb2ac8 AM |
8406 | cookie.rel = cookie.rels; |
8407 | cookie.relend = cookie.rels; | |
8408 | if (cookie.rels != NULL) | |
8409 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
8410 | ||
126495ed | 8411 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
8412 | elf_reloc_symbol_deleted_p, |
8413 | &cookie)) | |
b34976b6 | 8414 | ret = TRUE; |
99eb2ac8 AM |
8415 | |
8416 | if (cookie.rels != NULL | |
8417 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
8418 | free (cookie.rels); |
8419 | } | |
8420 | ||
99eb2ac8 AM |
8421 | if (bed->elf_backend_discard_info != NULL |
8422 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 8423 | ret = TRUE; |
73d074b4 | 8424 | |
6cdc0ccc AM |
8425 | if (cookie.locsyms != NULL |
8426 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
8427 | { | |
8428 | if (! info->keep_memory) | |
8429 | free (cookie.locsyms); | |
8430 | else | |
8431 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
8432 | } | |
73d074b4 | 8433 | } |
65765700 | 8434 | |
126495ed | 8435 | if (info->eh_frame_hdr |
2d36fe5f | 8436 | && !info->relocateable |
126495ed | 8437 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
b34976b6 | 8438 | ret = TRUE; |
99eb2ac8 | 8439 | |
73d074b4 DJ |
8440 | return ret; |
8441 | } | |
8442 | ||
b34976b6 | 8443 | static bfd_boolean |
73d074b4 DJ |
8444 | elf_section_ignore_discarded_relocs (sec) |
8445 | asection *sec; | |
8446 | { | |
40b829d4 AM |
8447 | struct elf_backend_data *bed; |
8448 | ||
68bfbfcc | 8449 | switch (sec->sec_info_type) |
65765700 JJ |
8450 | { |
8451 | case ELF_INFO_TYPE_STABS: | |
8452 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 8453 | return TRUE; |
65765700 JJ |
8454 | default: |
8455 | break; | |
8456 | } | |
40b829d4 AM |
8457 | |
8458 | bed = get_elf_backend_data (sec->owner); | |
8459 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
8460 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 8461 | return TRUE; |
65765700 | 8462 | |
b34976b6 | 8463 | return FALSE; |
73d074b4 | 8464 | } |