Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
6f2750fe | 2 | Copyright (C) 1995-2016 Free Software Foundation, Inc. |
252b5132 | 3 | |
8fdd7217 | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
8fdd7217 NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8fdd7217 | 9 | (at your option) any later version. |
252b5132 | 10 | |
8fdd7217 NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
8fdd7217 NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
53df40a4 | 23 | #include "bfd_stdint.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #define ARCH_SIZE 0 | |
27 | #include "elf-bfd.h" | |
4ad4eba5 | 28 | #include "safe-ctype.h" |
ccf2f652 | 29 | #include "libiberty.h" |
66eb6687 | 30 | #include "objalloc.h" |
252b5132 | 31 | |
28caa186 AM |
32 | /* This struct is used to pass information to routines called via |
33 | elf_link_hash_traverse which must return failure. */ | |
34 | ||
35 | struct elf_info_failed | |
36 | { | |
37 | struct bfd_link_info *info; | |
28caa186 AM |
38 | bfd_boolean failed; |
39 | }; | |
40 | ||
41 | /* This structure is used to pass information to | |
42 | _bfd_elf_link_find_version_dependencies. */ | |
43 | ||
44 | struct elf_find_verdep_info | |
45 | { | |
46 | /* General link information. */ | |
47 | struct bfd_link_info *info; | |
48 | /* The number of dependencies. */ | |
49 | unsigned int vers; | |
50 | /* Whether we had a failure. */ | |
51 | bfd_boolean failed; | |
52 | }; | |
53 | ||
54 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
55 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
56 | ||
2f0c68f2 CM |
57 | asection * |
58 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
59 | unsigned long r_symndx, | |
60 | bfd_boolean discard) | |
61 | { | |
62 | if (r_symndx >= cookie->locsymcount | |
63 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
64 | { | |
65 | struct elf_link_hash_entry *h; | |
66 | ||
67 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
68 | ||
69 | while (h->root.type == bfd_link_hash_indirect | |
70 | || h->root.type == bfd_link_hash_warning) | |
71 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
72 | ||
73 | if ((h->root.type == bfd_link_hash_defined | |
74 | || h->root.type == bfd_link_hash_defweak) | |
75 | && discarded_section (h->root.u.def.section)) | |
76 | return h->root.u.def.section; | |
77 | else | |
78 | return NULL; | |
79 | } | |
80 | else | |
81 | { | |
82 | /* It's not a relocation against a global symbol, | |
83 | but it could be a relocation against a local | |
84 | symbol for a discarded section. */ | |
85 | asection *isec; | |
86 | Elf_Internal_Sym *isym; | |
87 | ||
88 | /* Need to: get the symbol; get the section. */ | |
89 | isym = &cookie->locsyms[r_symndx]; | |
90 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
91 | if (isec != NULL | |
92 | && discard ? discarded_section (isec) : 1) | |
93 | return isec; | |
94 | } | |
95 | return NULL; | |
96 | } | |
97 | ||
d98685ac AM |
98 | /* Define a symbol in a dynamic linkage section. */ |
99 | ||
100 | struct elf_link_hash_entry * | |
101 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
102 | struct bfd_link_info *info, | |
103 | asection *sec, | |
104 | const char *name) | |
105 | { | |
106 | struct elf_link_hash_entry *h; | |
107 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 108 | const struct elf_backend_data *bed; |
d98685ac AM |
109 | |
110 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
111 | if (h != NULL) | |
112 | { | |
113 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
114 | This is a symptom of a larger problem: Absolute symbols | |
115 | defined in shared libraries can't be overridden, because we | |
116 | lose the link to the bfd which is via the symbol section. */ | |
117 | h->root.type = bfd_link_hash_new; | |
118 | } | |
119 | ||
120 | bh = &h->root; | |
cf18fda4 | 121 | bed = get_elf_backend_data (abfd); |
d98685ac | 122 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
cf18fda4 | 123 | sec, 0, NULL, FALSE, bed->collect, |
d98685ac AM |
124 | &bh)) |
125 | return NULL; | |
126 | h = (struct elf_link_hash_entry *) bh; | |
127 | h->def_regular = 1; | |
e28df02b | 128 | h->non_elf = 0; |
12b2843a | 129 | h->root.linker_def = 1; |
d98685ac | 130 | h->type = STT_OBJECT; |
00b7642b AM |
131 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
132 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 133 | |
ccabcbe5 | 134 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
d98685ac AM |
135 | return h; |
136 | } | |
137 | ||
b34976b6 | 138 | bfd_boolean |
268b6b39 | 139 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
140 | { |
141 | flagword flags; | |
aad5d350 | 142 | asection *s; |
252b5132 | 143 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 144 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 145 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
146 | |
147 | /* This function may be called more than once. */ | |
3d4d4302 AM |
148 | s = bfd_get_linker_section (abfd, ".got"); |
149 | if (s != NULL) | |
b34976b6 | 150 | return TRUE; |
252b5132 | 151 | |
e5a52504 | 152 | flags = bed->dynamic_sec_flags; |
252b5132 | 153 | |
14b2f831 AM |
154 | s = bfd_make_section_anyway_with_flags (abfd, |
155 | (bed->rela_plts_and_copies_p | |
156 | ? ".rela.got" : ".rel.got"), | |
157 | (bed->dynamic_sec_flags | |
158 | | SEC_READONLY)); | |
6de2ae4a L |
159 | if (s == NULL |
160 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
161 | return FALSE; | |
162 | htab->srelgot = s; | |
252b5132 | 163 | |
14b2f831 | 164 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d L |
165 | if (s == NULL |
166 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
167 | return FALSE; | |
168 | htab->sgot = s; | |
169 | ||
252b5132 RH |
170 | if (bed->want_got_plt) |
171 | { | |
14b2f831 | 172 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 173 | if (s == NULL |
6de2ae4a L |
174 | || !bfd_set_section_alignment (abfd, s, |
175 | bed->s->log_file_align)) | |
b34976b6 | 176 | return FALSE; |
6de2ae4a | 177 | htab->sgotplt = s; |
252b5132 RH |
178 | } |
179 | ||
64e77c6d L |
180 | /* The first bit of the global offset table is the header. */ |
181 | s->size += bed->got_header_size; | |
182 | ||
2517a57f AM |
183 | if (bed->want_got_sym) |
184 | { | |
185 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
186 | (or .got.plt) section. We don't do this in the linker script | |
187 | because we don't want to define the symbol if we are not creating | |
188 | a global offset table. */ | |
6de2ae4a L |
189 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
190 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 191 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
192 | if (h == NULL) |
193 | return FALSE; | |
2517a57f | 194 | } |
252b5132 | 195 | |
b34976b6 | 196 | return TRUE; |
252b5132 RH |
197 | } |
198 | \f | |
7e9f0867 AM |
199 | /* Create a strtab to hold the dynamic symbol names. */ |
200 | static bfd_boolean | |
201 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
202 | { | |
203 | struct elf_link_hash_table *hash_table; | |
204 | ||
205 | hash_table = elf_hash_table (info); | |
206 | if (hash_table->dynobj == NULL) | |
207 | hash_table->dynobj = abfd; | |
208 | ||
209 | if (hash_table->dynstr == NULL) | |
210 | { | |
211 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
212 | if (hash_table->dynstr == NULL) | |
213 | return FALSE; | |
214 | } | |
215 | return TRUE; | |
216 | } | |
217 | ||
45d6a902 AM |
218 | /* Create some sections which will be filled in with dynamic linking |
219 | information. ABFD is an input file which requires dynamic sections | |
220 | to be created. The dynamic sections take up virtual memory space | |
221 | when the final executable is run, so we need to create them before | |
222 | addresses are assigned to the output sections. We work out the | |
223 | actual contents and size of these sections later. */ | |
252b5132 | 224 | |
b34976b6 | 225 | bfd_boolean |
268b6b39 | 226 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 227 | { |
45d6a902 | 228 | flagword flags; |
91d6fa6a | 229 | asection *s; |
9c5bfbb7 | 230 | const struct elf_backend_data *bed; |
9637f6ef | 231 | struct elf_link_hash_entry *h; |
252b5132 | 232 | |
0eddce27 | 233 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
234 | return FALSE; |
235 | ||
236 | if (elf_hash_table (info)->dynamic_sections_created) | |
237 | return TRUE; | |
238 | ||
7e9f0867 AM |
239 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
240 | return FALSE; | |
45d6a902 | 241 | |
7e9f0867 | 242 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
243 | bed = get_elf_backend_data (abfd); |
244 | ||
245 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
246 | |
247 | /* A dynamically linked executable has a .interp section, but a | |
248 | shared library does not. */ | |
9b8b325a | 249 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 250 | { |
14b2f831 AM |
251 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
252 | flags | SEC_READONLY); | |
3496cb2a | 253 | if (s == NULL) |
45d6a902 AM |
254 | return FALSE; |
255 | } | |
bb0deeff | 256 | |
45d6a902 AM |
257 | /* Create sections to hold version informations. These are removed |
258 | if they are not needed. */ | |
14b2f831 AM |
259 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
260 | flags | SEC_READONLY); | |
45d6a902 | 261 | if (s == NULL |
45d6a902 AM |
262 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
263 | return FALSE; | |
264 | ||
14b2f831 AM |
265 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
266 | flags | SEC_READONLY); | |
45d6a902 | 267 | if (s == NULL |
45d6a902 AM |
268 | || ! bfd_set_section_alignment (abfd, s, 1)) |
269 | return FALSE; | |
270 | ||
14b2f831 AM |
271 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
272 | flags | SEC_READONLY); | |
45d6a902 | 273 | if (s == NULL |
45d6a902 AM |
274 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
275 | return FALSE; | |
276 | ||
14b2f831 AM |
277 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
278 | flags | SEC_READONLY); | |
45d6a902 | 279 | if (s == NULL |
45d6a902 AM |
280 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
281 | return FALSE; | |
cae1fbbb | 282 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 283 | |
14b2f831 AM |
284 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
285 | flags | SEC_READONLY); | |
3496cb2a | 286 | if (s == NULL) |
45d6a902 AM |
287 | return FALSE; |
288 | ||
14b2f831 | 289 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 290 | if (s == NULL |
45d6a902 AM |
291 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
292 | return FALSE; | |
293 | ||
294 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
295 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
296 | only want to define it if we are, in fact, creating a .dynamic | |
297 | section. We don't want to define it if there is no .dynamic | |
298 | section, since on some ELF platforms the start up code examines it | |
299 | to decide how to initialize the process. */ | |
9637f6ef L |
300 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
301 | elf_hash_table (info)->hdynamic = h; | |
302 | if (h == NULL) | |
45d6a902 AM |
303 | return FALSE; |
304 | ||
fdc90cb4 JJ |
305 | if (info->emit_hash) |
306 | { | |
14b2f831 AM |
307 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
308 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
309 | if (s == NULL |
310 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
311 | return FALSE; | |
312 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
313 | } | |
314 | ||
315 | if (info->emit_gnu_hash) | |
316 | { | |
14b2f831 AM |
317 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
318 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
319 | if (s == NULL |
320 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
321 | return FALSE; | |
322 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
323 | 4 32-bit words followed by variable count of 64-bit words, then | |
324 | variable count of 32-bit words. */ | |
325 | if (bed->s->arch_size == 64) | |
326 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
327 | else | |
328 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
329 | } | |
45d6a902 AM |
330 | |
331 | /* Let the backend create the rest of the sections. This lets the | |
332 | backend set the right flags. The backend will normally create | |
333 | the .got and .plt sections. */ | |
894891db NC |
334 | if (bed->elf_backend_create_dynamic_sections == NULL |
335 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
336 | return FALSE; |
337 | ||
338 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
339 | ||
340 | return TRUE; | |
341 | } | |
342 | ||
343 | /* Create dynamic sections when linking against a dynamic object. */ | |
344 | ||
345 | bfd_boolean | |
268b6b39 | 346 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
347 | { |
348 | flagword flags, pltflags; | |
7325306f | 349 | struct elf_link_hash_entry *h; |
45d6a902 | 350 | asection *s; |
9c5bfbb7 | 351 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 352 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 353 | |
252b5132 RH |
354 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
355 | .rel[a].bss sections. */ | |
e5a52504 | 356 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
357 | |
358 | pltflags = flags; | |
252b5132 | 359 | if (bed->plt_not_loaded) |
6df4d94c MM |
360 | /* We do not clear SEC_ALLOC here because we still want the OS to |
361 | allocate space for the section; it's just that there's nothing | |
362 | to read in from the object file. */ | |
5d1634d7 | 363 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
364 | else |
365 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
366 | if (bed->plt_readonly) |
367 | pltflags |= SEC_READONLY; | |
368 | ||
14b2f831 | 369 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 370 | if (s == NULL |
252b5132 | 371 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 372 | return FALSE; |
6de2ae4a | 373 | htab->splt = s; |
252b5132 | 374 | |
d98685ac AM |
375 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
376 | .plt section. */ | |
7325306f RS |
377 | if (bed->want_plt_sym) |
378 | { | |
379 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
380 | "_PROCEDURE_LINKAGE_TABLE_"); | |
381 | elf_hash_table (info)->hplt = h; | |
382 | if (h == NULL) | |
383 | return FALSE; | |
384 | } | |
252b5132 | 385 | |
14b2f831 AM |
386 | s = bfd_make_section_anyway_with_flags (abfd, |
387 | (bed->rela_plts_and_copies_p | |
388 | ? ".rela.plt" : ".rel.plt"), | |
389 | flags | SEC_READONLY); | |
252b5132 | 390 | if (s == NULL |
45d6a902 | 391 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 392 | return FALSE; |
6de2ae4a | 393 | htab->srelplt = s; |
252b5132 RH |
394 | |
395 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 396 | return FALSE; |
252b5132 | 397 | |
3018b441 RH |
398 | if (bed->want_dynbss) |
399 | { | |
400 | /* The .dynbss section is a place to put symbols which are defined | |
401 | by dynamic objects, are referenced by regular objects, and are | |
402 | not functions. We must allocate space for them in the process | |
403 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
404 | initialize them at run time. The linker script puts the .dynbss | |
405 | section into the .bss section of the final image. */ | |
14b2f831 AM |
406 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
407 | (SEC_ALLOC | SEC_LINKER_CREATED)); | |
3496cb2a | 408 | if (s == NULL) |
b34976b6 | 409 | return FALSE; |
252b5132 | 410 | |
3018b441 | 411 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
412 | normally needed. We need to create it here, though, so that the |
413 | linker will map it to an output section. We can't just create it | |
414 | only if we need it, because we will not know whether we need it | |
415 | until we have seen all the input files, and the first time the | |
416 | main linker code calls BFD after examining all the input files | |
417 | (size_dynamic_sections) the input sections have already been | |
418 | mapped to the output sections. If the section turns out not to | |
419 | be needed, we can discard it later. We will never need this | |
420 | section when generating a shared object, since they do not use | |
421 | copy relocs. */ | |
0e1862bb | 422 | if (! bfd_link_pic (info)) |
3018b441 | 423 | { |
14b2f831 AM |
424 | s = bfd_make_section_anyway_with_flags (abfd, |
425 | (bed->rela_plts_and_copies_p | |
426 | ? ".rela.bss" : ".rel.bss"), | |
427 | flags | SEC_READONLY); | |
3018b441 | 428 | if (s == NULL |
45d6a902 | 429 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 430 | return FALSE; |
3018b441 | 431 | } |
252b5132 RH |
432 | } |
433 | ||
b34976b6 | 434 | return TRUE; |
252b5132 RH |
435 | } |
436 | \f | |
252b5132 RH |
437 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
438 | read the input files, since we need to have a list of all of them | |
439 | before we can determine the final sizes of the output sections. | |
440 | Note that we may actually call this function even though we are not | |
441 | going to output any dynamic symbols; in some cases we know that a | |
442 | symbol should be in the dynamic symbol table, but only if there is | |
443 | one. */ | |
444 | ||
b34976b6 | 445 | bfd_boolean |
c152c796 AM |
446 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
447 | struct elf_link_hash_entry *h) | |
252b5132 RH |
448 | { |
449 | if (h->dynindx == -1) | |
450 | { | |
2b0f7ef9 | 451 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 452 | char *p; |
252b5132 | 453 | const char *name; |
252b5132 RH |
454 | bfd_size_type indx; |
455 | ||
7a13edea NC |
456 | /* XXX: The ABI draft says the linker must turn hidden and |
457 | internal symbols into STB_LOCAL symbols when producing the | |
458 | DSO. However, if ld.so honors st_other in the dynamic table, | |
459 | this would not be necessary. */ | |
460 | switch (ELF_ST_VISIBILITY (h->other)) | |
461 | { | |
462 | case STV_INTERNAL: | |
463 | case STV_HIDDEN: | |
9d6eee78 L |
464 | if (h->root.type != bfd_link_hash_undefined |
465 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 466 | { |
f5385ebf | 467 | h->forced_local = 1; |
67687978 PB |
468 | if (!elf_hash_table (info)->is_relocatable_executable) |
469 | return TRUE; | |
7a13edea | 470 | } |
0444bdd4 | 471 | |
7a13edea NC |
472 | default: |
473 | break; | |
474 | } | |
475 | ||
252b5132 RH |
476 | h->dynindx = elf_hash_table (info)->dynsymcount; |
477 | ++elf_hash_table (info)->dynsymcount; | |
478 | ||
479 | dynstr = elf_hash_table (info)->dynstr; | |
480 | if (dynstr == NULL) | |
481 | { | |
482 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 483 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 484 | if (dynstr == NULL) |
b34976b6 | 485 | return FALSE; |
252b5132 RH |
486 | } |
487 | ||
488 | /* We don't put any version information in the dynamic string | |
aad5d350 | 489 | table. */ |
252b5132 RH |
490 | name = h->root.root.string; |
491 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
492 | if (p != NULL) |
493 | /* We know that the p points into writable memory. In fact, | |
494 | there are only a few symbols that have read-only names, being | |
495 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
496 | by the backends. Most symbols will have names pointing into | |
497 | an ELF string table read from a file, or to objalloc memory. */ | |
498 | *p = 0; | |
499 | ||
500 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
501 | ||
502 | if (p != NULL) | |
503 | *p = ELF_VER_CHR; | |
252b5132 RH |
504 | |
505 | if (indx == (bfd_size_type) -1) | |
b34976b6 | 506 | return FALSE; |
252b5132 RH |
507 | h->dynstr_index = indx; |
508 | } | |
509 | ||
b34976b6 | 510 | return TRUE; |
252b5132 | 511 | } |
45d6a902 | 512 | \f |
55255dae L |
513 | /* Mark a symbol dynamic. */ |
514 | ||
28caa186 | 515 | static void |
55255dae | 516 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
517 | struct elf_link_hash_entry *h, |
518 | Elf_Internal_Sym *sym) | |
55255dae | 519 | { |
40b36307 | 520 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 521 | |
40b36307 | 522 | /* It may be called more than once on the same H. */ |
0e1862bb | 523 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
524 | return; |
525 | ||
40b36307 L |
526 | if ((info->dynamic_data |
527 | && (h->type == STT_OBJECT | |
b8871f35 | 528 | || h->type == STT_COMMON |
40b36307 | 529 | || (sym != NULL |
b8871f35 L |
530 | && (ELF_ST_TYPE (sym->st_info) == STT_OBJECT |
531 | || ELF_ST_TYPE (sym->st_info) == STT_COMMON)))) | |
a0c8462f | 532 | || (d != NULL |
40b36307 L |
533 | && h->root.type == bfd_link_hash_new |
534 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
535 | h->dynamic = 1; |
536 | } | |
537 | ||
45d6a902 AM |
538 | /* Record an assignment to a symbol made by a linker script. We need |
539 | this in case some dynamic object refers to this symbol. */ | |
540 | ||
541 | bfd_boolean | |
fe21a8fc L |
542 | bfd_elf_record_link_assignment (bfd *output_bfd, |
543 | struct bfd_link_info *info, | |
268b6b39 | 544 | const char *name, |
fe21a8fc L |
545 | bfd_boolean provide, |
546 | bfd_boolean hidden) | |
45d6a902 | 547 | { |
00cbee0a | 548 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 549 | struct elf_link_hash_table *htab; |
00cbee0a | 550 | const struct elf_backend_data *bed; |
45d6a902 | 551 | |
0eddce27 | 552 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
553 | return TRUE; |
554 | ||
4ea42fb7 AM |
555 | htab = elf_hash_table (info); |
556 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 557 | if (h == NULL) |
4ea42fb7 | 558 | return provide; |
45d6a902 | 559 | |
0f550b3d L |
560 | if (h->versioned == unknown) |
561 | { | |
562 | /* Set versioned if symbol version is unknown. */ | |
563 | char *version = strrchr (name, ELF_VER_CHR); | |
564 | if (version) | |
565 | { | |
566 | if (version > name && version[-1] != ELF_VER_CHR) | |
567 | h->versioned = versioned_hidden; | |
568 | else | |
569 | h->versioned = versioned; | |
570 | } | |
571 | } | |
572 | ||
00cbee0a | 573 | switch (h->root.type) |
77cfaee6 | 574 | { |
00cbee0a L |
575 | case bfd_link_hash_defined: |
576 | case bfd_link_hash_defweak: | |
577 | case bfd_link_hash_common: | |
578 | break; | |
579 | case bfd_link_hash_undefweak: | |
580 | case bfd_link_hash_undefined: | |
581 | /* Since we're defining the symbol, don't let it seem to have not | |
582 | been defined. record_dynamic_symbol and size_dynamic_sections | |
583 | may depend on this. */ | |
4ea42fb7 | 584 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
585 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
586 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
587 | break; |
588 | case bfd_link_hash_new: | |
40b36307 | 589 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 590 | h->non_elf = 0; |
00cbee0a L |
591 | break; |
592 | case bfd_link_hash_indirect: | |
593 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 594 | the versioned symbol point to this one. */ |
00cbee0a L |
595 | bed = get_elf_backend_data (output_bfd); |
596 | hv = h; | |
597 | while (hv->root.type == bfd_link_hash_indirect | |
598 | || hv->root.type == bfd_link_hash_warning) | |
599 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
600 | /* We don't need to update h->root.u since linker will set them | |
601 | later. */ | |
602 | h->root.type = bfd_link_hash_undefined; | |
603 | hv->root.type = bfd_link_hash_indirect; | |
604 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
605 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
606 | break; | |
607 | case bfd_link_hash_warning: | |
608 | abort (); | |
609 | break; | |
55255dae | 610 | } |
45d6a902 AM |
611 | |
612 | /* If this symbol is being provided by the linker script, and it is | |
613 | currently defined by a dynamic object, but not by a regular | |
614 | object, then mark it as undefined so that the generic linker will | |
615 | force the correct value. */ | |
616 | if (provide | |
f5385ebf AM |
617 | && h->def_dynamic |
618 | && !h->def_regular) | |
45d6a902 AM |
619 | h->root.type = bfd_link_hash_undefined; |
620 | ||
621 | /* If this symbol is not being provided by the linker script, and it is | |
622 | currently defined by a dynamic object, but not by a regular object, | |
623 | then clear out any version information because the symbol will not be | |
624 | associated with the dynamic object any more. */ | |
625 | if (!provide | |
f5385ebf AM |
626 | && h->def_dynamic |
627 | && !h->def_regular) | |
45d6a902 AM |
628 | h->verinfo.verdef = NULL; |
629 | ||
f5385ebf | 630 | h->def_regular = 1; |
45d6a902 | 631 | |
eb8476a6 | 632 | if (hidden) |
fe21a8fc | 633 | { |
91d6fa6a | 634 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
635 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
636 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
637 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
638 | } | |
639 | ||
6fa3860b PB |
640 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
641 | and executables. */ | |
0e1862bb | 642 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
643 | && h->dynindx != -1 |
644 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
645 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
646 | h->forced_local = 1; | |
647 | ||
f5385ebf AM |
648 | if ((h->def_dynamic |
649 | || h->ref_dynamic | |
6b3b0ab8 L |
650 | || bfd_link_dll (info) |
651 | || elf_hash_table (info)->is_relocatable_executable) | |
45d6a902 AM |
652 | && h->dynindx == -1) |
653 | { | |
c152c796 | 654 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
655 | return FALSE; |
656 | ||
657 | /* If this is a weak defined symbol, and we know a corresponding | |
658 | real symbol from the same dynamic object, make sure the real | |
659 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
660 | if (h->u.weakdef != NULL |
661 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 662 | { |
f6e332e6 | 663 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
664 | return FALSE; |
665 | } | |
666 | } | |
667 | ||
668 | return TRUE; | |
669 | } | |
42751cf3 | 670 | |
8c58d23b AM |
671 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
672 | success, and 2 on a failure caused by attempting to record a symbol | |
673 | in a discarded section, eg. a discarded link-once section symbol. */ | |
674 | ||
675 | int | |
c152c796 AM |
676 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
677 | bfd *input_bfd, | |
678 | long input_indx) | |
8c58d23b AM |
679 | { |
680 | bfd_size_type amt; | |
681 | struct elf_link_local_dynamic_entry *entry; | |
682 | struct elf_link_hash_table *eht; | |
683 | struct elf_strtab_hash *dynstr; | |
684 | unsigned long dynstr_index; | |
685 | char *name; | |
686 | Elf_External_Sym_Shndx eshndx; | |
687 | char esym[sizeof (Elf64_External_Sym)]; | |
688 | ||
0eddce27 | 689 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
690 | return 0; |
691 | ||
692 | /* See if the entry exists already. */ | |
693 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
694 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
695 | return 1; | |
696 | ||
697 | amt = sizeof (*entry); | |
a50b1753 | 698 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
699 | if (entry == NULL) |
700 | return 0; | |
701 | ||
702 | /* Go find the symbol, so that we can find it's name. */ | |
703 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 704 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
705 | { |
706 | bfd_release (input_bfd, entry); | |
707 | return 0; | |
708 | } | |
709 | ||
710 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 711 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
712 | { |
713 | asection *s; | |
714 | ||
715 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
716 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
717 | { | |
718 | /* We can still bfd_release here as nothing has done another | |
719 | bfd_alloc. We can't do this later in this function. */ | |
720 | bfd_release (input_bfd, entry); | |
721 | return 2; | |
722 | } | |
723 | } | |
724 | ||
725 | name = (bfd_elf_string_from_elf_section | |
726 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
727 | entry->isym.st_name)); | |
728 | ||
729 | dynstr = elf_hash_table (info)->dynstr; | |
730 | if (dynstr == NULL) | |
731 | { | |
732 | /* Create a strtab to hold the dynamic symbol names. */ | |
733 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
734 | if (dynstr == NULL) | |
735 | return 0; | |
736 | } | |
737 | ||
b34976b6 | 738 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
8c58d23b AM |
739 | if (dynstr_index == (unsigned long) -1) |
740 | return 0; | |
741 | entry->isym.st_name = dynstr_index; | |
742 | ||
743 | eht = elf_hash_table (info); | |
744 | ||
745 | entry->next = eht->dynlocal; | |
746 | eht->dynlocal = entry; | |
747 | entry->input_bfd = input_bfd; | |
748 | entry->input_indx = input_indx; | |
749 | eht->dynsymcount++; | |
750 | ||
751 | /* Whatever binding the symbol had before, it's now local. */ | |
752 | entry->isym.st_info | |
753 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
754 | ||
755 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
756 | ||
757 | return 1; | |
758 | } | |
759 | ||
30b30c21 | 760 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 761 | |
30b30c21 | 762 | long |
268b6b39 AM |
763 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
764 | bfd *input_bfd, | |
765 | long input_indx) | |
30b30c21 RH |
766 | { |
767 | struct elf_link_local_dynamic_entry *e; | |
768 | ||
769 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
770 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
771 | return e->dynindx; | |
772 | return -1; | |
773 | } | |
774 | ||
775 | /* This function is used to renumber the dynamic symbols, if some of | |
776 | them are removed because they are marked as local. This is called | |
777 | via elf_link_hash_traverse. */ | |
778 | ||
b34976b6 | 779 | static bfd_boolean |
268b6b39 AM |
780 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
781 | void *data) | |
42751cf3 | 782 | { |
a50b1753 | 783 | size_t *count = (size_t *) data; |
30b30c21 | 784 | |
6fa3860b PB |
785 | if (h->forced_local) |
786 | return TRUE; | |
787 | ||
788 | if (h->dynindx != -1) | |
789 | h->dynindx = ++(*count); | |
790 | ||
791 | return TRUE; | |
792 | } | |
793 | ||
794 | ||
795 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
796 | STB_LOCAL binding. */ | |
797 | ||
798 | static bfd_boolean | |
799 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
800 | void *data) | |
801 | { | |
a50b1753 | 802 | size_t *count = (size_t *) data; |
6fa3860b | 803 | |
6fa3860b PB |
804 | if (!h->forced_local) |
805 | return TRUE; | |
806 | ||
42751cf3 | 807 | if (h->dynindx != -1) |
30b30c21 RH |
808 | h->dynindx = ++(*count); |
809 | ||
b34976b6 | 810 | return TRUE; |
42751cf3 | 811 | } |
30b30c21 | 812 | |
aee6f5b4 AO |
813 | /* Return true if the dynamic symbol for a given section should be |
814 | omitted when creating a shared library. */ | |
815 | bfd_boolean | |
816 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
817 | struct bfd_link_info *info, | |
818 | asection *p) | |
819 | { | |
74541ad4 | 820 | struct elf_link_hash_table *htab; |
ca55926c | 821 | asection *ip; |
74541ad4 | 822 | |
aee6f5b4 AO |
823 | switch (elf_section_data (p)->this_hdr.sh_type) |
824 | { | |
825 | case SHT_PROGBITS: | |
826 | case SHT_NOBITS: | |
827 | /* If sh_type is yet undecided, assume it could be | |
828 | SHT_PROGBITS/SHT_NOBITS. */ | |
829 | case SHT_NULL: | |
74541ad4 AM |
830 | htab = elf_hash_table (info); |
831 | if (p == htab->tls_sec) | |
832 | return FALSE; | |
833 | ||
834 | if (htab->text_index_section != NULL) | |
835 | return p != htab->text_index_section && p != htab->data_index_section; | |
836 | ||
ca55926c | 837 | return (htab->dynobj != NULL |
3d4d4302 | 838 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 839 | && ip->output_section == p); |
aee6f5b4 AO |
840 | |
841 | /* There shouldn't be section relative relocations | |
842 | against any other section. */ | |
843 | default: | |
844 | return TRUE; | |
845 | } | |
846 | } | |
847 | ||
062e2358 | 848 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
849 | symbol for each output section, which come first. Next come symbols |
850 | which have been forced to local binding. Then all of the back-end | |
851 | allocated local dynamic syms, followed by the rest of the global | |
852 | symbols. */ | |
30b30c21 | 853 | |
554220db AM |
854 | static unsigned long |
855 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
856 | struct bfd_link_info *info, | |
857 | unsigned long *section_sym_count) | |
30b30c21 RH |
858 | { |
859 | unsigned long dynsymcount = 0; | |
860 | ||
0e1862bb L |
861 | if (bfd_link_pic (info) |
862 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 863 | { |
aee6f5b4 | 864 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
865 | asection *p; |
866 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 867 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
868 | && (p->flags & SEC_ALLOC) != 0 |
869 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
870 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
871 | else |
872 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 873 | } |
554220db | 874 | *section_sym_count = dynsymcount; |
30b30c21 | 875 | |
6fa3860b PB |
876 | elf_link_hash_traverse (elf_hash_table (info), |
877 | elf_link_renumber_local_hash_table_dynsyms, | |
878 | &dynsymcount); | |
879 | ||
30b30c21 RH |
880 | if (elf_hash_table (info)->dynlocal) |
881 | { | |
882 | struct elf_link_local_dynamic_entry *p; | |
883 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
884 | p->dynindx = ++dynsymcount; | |
885 | } | |
886 | ||
887 | elf_link_hash_traverse (elf_hash_table (info), | |
888 | elf_link_renumber_hash_table_dynsyms, | |
889 | &dynsymcount); | |
890 | ||
891 | /* There is an unused NULL entry at the head of the table which | |
1a6e6083 L |
892 | we must account for in our count. We always create the dynsym |
893 | section, even if it is empty, with dynamic sections. */ | |
894 | if (elf_hash_table (info)->dynamic_sections_created) | |
30b30c21 RH |
895 | ++dynsymcount; |
896 | ||
ccabcbe5 AM |
897 | elf_hash_table (info)->dynsymcount = dynsymcount; |
898 | return dynsymcount; | |
30b30c21 | 899 | } |
252b5132 | 900 | |
54ac0771 L |
901 | /* Merge st_other field. */ |
902 | ||
903 | static void | |
904 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
b8417128 | 905 | const Elf_Internal_Sym *isym, asection *sec, |
cd3416da | 906 | bfd_boolean definition, bfd_boolean dynamic) |
54ac0771 L |
907 | { |
908 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
909 | ||
910 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 911 | code might be needed here. */ |
54ac0771 L |
912 | if (bed->elf_backend_merge_symbol_attribute) |
913 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
914 | dynamic); | |
915 | ||
cd3416da | 916 | if (!dynamic) |
54ac0771 | 917 | { |
cd3416da AM |
918 | unsigned symvis = ELF_ST_VISIBILITY (isym->st_other); |
919 | unsigned hvis = ELF_ST_VISIBILITY (h->other); | |
54ac0771 | 920 | |
cd3416da AM |
921 | /* Keep the most constraining visibility. Leave the remainder |
922 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
923 | if (symvis - 1 < hvis - 1) | |
924 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 925 | } |
b8417128 AM |
926 | else if (definition |
927 | && ELF_ST_VISIBILITY (isym->st_other) != STV_DEFAULT | |
928 | && (sec->flags & SEC_READONLY) == 0) | |
6cabe1ea | 929 | h->protected_def = 1; |
54ac0771 L |
930 | } |
931 | ||
4f3fedcf AM |
932 | /* This function is called when we want to merge a new symbol with an |
933 | existing symbol. It handles the various cases which arise when we | |
934 | find a definition in a dynamic object, or when there is already a | |
935 | definition in a dynamic object. The new symbol is described by | |
936 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
937 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
938 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
939 | of an old common symbol. We set OVERRIDE if the old symbol is | |
940 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
941 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
942 | to change. By OK to change, we mean that we shouldn't warn if the | |
943 | type or size does change. */ | |
45d6a902 | 944 | |
8a56bd02 | 945 | static bfd_boolean |
268b6b39 AM |
946 | _bfd_elf_merge_symbol (bfd *abfd, |
947 | struct bfd_link_info *info, | |
948 | const char *name, | |
949 | Elf_Internal_Sym *sym, | |
950 | asection **psec, | |
951 | bfd_vma *pvalue, | |
4f3fedcf AM |
952 | struct elf_link_hash_entry **sym_hash, |
953 | bfd **poldbfd, | |
37a9e49a | 954 | bfd_boolean *pold_weak, |
af44c138 | 955 | unsigned int *pold_alignment, |
268b6b39 AM |
956 | bfd_boolean *skip, |
957 | bfd_boolean *override, | |
958 | bfd_boolean *type_change_ok, | |
6e33951e L |
959 | bfd_boolean *size_change_ok, |
960 | bfd_boolean *matched) | |
252b5132 | 961 | { |
7479dfd4 | 962 | asection *sec, *oldsec; |
45d6a902 | 963 | struct elf_link_hash_entry *h; |
90c984fc | 964 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
965 | struct elf_link_hash_entry *flip; |
966 | int bind; | |
967 | bfd *oldbfd; | |
968 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 969 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 970 | const struct elf_backend_data *bed; |
6e33951e | 971 | char *new_version; |
45d6a902 AM |
972 | |
973 | *skip = FALSE; | |
974 | *override = FALSE; | |
975 | ||
976 | sec = *psec; | |
977 | bind = ELF_ST_BIND (sym->st_info); | |
978 | ||
979 | if (! bfd_is_und_section (sec)) | |
980 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
981 | else | |
982 | h = ((struct elf_link_hash_entry *) | |
983 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
984 | if (h == NULL) | |
985 | return FALSE; | |
986 | *sym_hash = h; | |
252b5132 | 987 | |
88ba32a0 L |
988 | bed = get_elf_backend_data (abfd); |
989 | ||
6e33951e | 990 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 991 | if (h->versioned != unversioned) |
6e33951e | 992 | { |
422f1182 L |
993 | /* Symbol version is unknown or versioned. */ |
994 | new_version = strrchr (name, ELF_VER_CHR); | |
995 | if (new_version) | |
996 | { | |
997 | if (h->versioned == unknown) | |
998 | { | |
999 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
1000 | h->versioned = versioned_hidden; | |
1001 | else | |
1002 | h->versioned = versioned; | |
1003 | } | |
1004 | new_version += 1; | |
1005 | if (new_version[0] == '\0') | |
1006 | new_version = NULL; | |
1007 | } | |
1008 | else | |
1009 | h->versioned = unversioned; | |
6e33951e | 1010 | } |
422f1182 L |
1011 | else |
1012 | new_version = NULL; | |
6e33951e | 1013 | |
90c984fc L |
1014 | /* For merging, we only care about real symbols. But we need to make |
1015 | sure that indirect symbol dynamic flags are updated. */ | |
1016 | hi = h; | |
45d6a902 AM |
1017 | while (h->root.type == bfd_link_hash_indirect |
1018 | || h->root.type == bfd_link_hash_warning) | |
1019 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1020 | ||
6e33951e L |
1021 | if (!*matched) |
1022 | { | |
1023 | if (hi == h || h->root.type == bfd_link_hash_new) | |
1024 | *matched = TRUE; | |
1025 | else | |
1026 | { | |
ae7683d2 | 1027 | /* OLD_HIDDEN is true if the existing symbol is only visible |
6e33951e | 1028 | to the symbol with the same symbol version. NEW_HIDDEN is |
ae7683d2 | 1029 | true if the new symbol is only visible to the symbol with |
6e33951e | 1030 | the same symbol version. */ |
422f1182 L |
1031 | bfd_boolean old_hidden = h->versioned == versioned_hidden; |
1032 | bfd_boolean new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1033 | if (!old_hidden && !new_hidden) |
1034 | /* The new symbol matches the existing symbol if both | |
1035 | aren't hidden. */ | |
1036 | *matched = TRUE; | |
1037 | else | |
1038 | { | |
1039 | /* OLD_VERSION is the symbol version of the existing | |
1040 | symbol. */ | |
422f1182 L |
1041 | char *old_version; |
1042 | ||
1043 | if (h->versioned >= versioned) | |
1044 | old_version = strrchr (h->root.root.string, | |
1045 | ELF_VER_CHR) + 1; | |
1046 | else | |
1047 | old_version = NULL; | |
6e33951e L |
1048 | |
1049 | /* The new symbol matches the existing symbol if they | |
1050 | have the same symbol version. */ | |
1051 | *matched = (old_version == new_version | |
1052 | || (old_version != NULL | |
1053 | && new_version != NULL | |
1054 | && strcmp (old_version, new_version) == 0)); | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | ||
934bce08 AM |
1059 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1060 | existing symbol. */ | |
1061 | ||
1062 | oldbfd = NULL; | |
1063 | oldsec = NULL; | |
1064 | switch (h->root.type) | |
1065 | { | |
1066 | default: | |
1067 | break; | |
1068 | ||
1069 | case bfd_link_hash_undefined: | |
1070 | case bfd_link_hash_undefweak: | |
1071 | oldbfd = h->root.u.undef.abfd; | |
1072 | break; | |
1073 | ||
1074 | case bfd_link_hash_defined: | |
1075 | case bfd_link_hash_defweak: | |
1076 | oldbfd = h->root.u.def.section->owner; | |
1077 | oldsec = h->root.u.def.section; | |
1078 | break; | |
1079 | ||
1080 | case bfd_link_hash_common: | |
1081 | oldbfd = h->root.u.c.p->section->owner; | |
1082 | oldsec = h->root.u.c.p->section; | |
1083 | if (pold_alignment) | |
1084 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1085 | break; | |
1086 | } | |
1087 | if (poldbfd && *poldbfd == NULL) | |
1088 | *poldbfd = oldbfd; | |
1089 | ||
1090 | /* Differentiate strong and weak symbols. */ | |
1091 | newweak = bind == STB_WEAK; | |
1092 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1093 | || h->root.type == bfd_link_hash_undefweak); | |
1094 | if (pold_weak) | |
1095 | *pold_weak = oldweak; | |
1096 | ||
1097 | /* This code is for coping with dynamic objects, and is only useful | |
1098 | if we are doing an ELF link. */ | |
1099 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
1100 | return TRUE; | |
1101 | ||
40b36307 | 1102 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1103 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1104 | symbols. */ |
1105 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1106 | ||
ee659f1f AM |
1107 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1108 | respectively, is from a dynamic object. */ | |
1109 | ||
1110 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1111 | ||
1112 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1113 | syms and defined syms in dynamic libraries respectively. | |
1114 | ref_dynamic on the other hand can be set for a symbol defined in | |
1115 | a dynamic library, and def_dynamic may not be set; When the | |
1116 | definition in a dynamic lib is overridden by a definition in the | |
1117 | executable use of the symbol in the dynamic lib becomes a | |
1118 | reference to the executable symbol. */ | |
1119 | if (newdyn) | |
1120 | { | |
1121 | if (bfd_is_und_section (sec)) | |
1122 | { | |
1123 | if (bind != STB_WEAK) | |
1124 | { | |
1125 | h->ref_dynamic_nonweak = 1; | |
1126 | hi->ref_dynamic_nonweak = 1; | |
1127 | } | |
1128 | } | |
1129 | else | |
1130 | { | |
6e33951e L |
1131 | /* Update the existing symbol only if they match. */ |
1132 | if (*matched) | |
1133 | h->dynamic_def = 1; | |
ee659f1f AM |
1134 | hi->dynamic_def = 1; |
1135 | } | |
1136 | } | |
1137 | ||
45d6a902 AM |
1138 | /* If we just created the symbol, mark it as being an ELF symbol. |
1139 | Other than that, there is nothing to do--there is no merge issue | |
1140 | with a newly defined symbol--so we just return. */ | |
1141 | ||
1142 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1143 | { |
f5385ebf | 1144 | h->non_elf = 0; |
45d6a902 AM |
1145 | return TRUE; |
1146 | } | |
252b5132 | 1147 | |
45d6a902 AM |
1148 | /* In cases involving weak versioned symbols, we may wind up trying |
1149 | to merge a symbol with itself. Catch that here, to avoid the | |
1150 | confusion that results if we try to override a symbol with | |
1151 | itself. The additional tests catch cases like | |
1152 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1153 | dynamic object, which we do want to handle here. */ | |
1154 | if (abfd == oldbfd | |
895fa45f | 1155 | && (newweak || oldweak) |
45d6a902 | 1156 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1157 | || !h->def_regular)) |
45d6a902 AM |
1158 | return TRUE; |
1159 | ||
707bba77 | 1160 | olddyn = FALSE; |
45d6a902 AM |
1161 | if (oldbfd != NULL) |
1162 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1163 | else if (oldsec != NULL) |
45d6a902 | 1164 | { |
707bba77 | 1165 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1166 | indices used by MIPS ELF. */ |
707bba77 | 1167 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1168 | } |
252b5132 | 1169 | |
45d6a902 AM |
1170 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1171 | respectively, appear to be a definition rather than reference. */ | |
1172 | ||
707bba77 | 1173 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1174 | |
07492f66 L |
1175 | /* The old common symbol in executable is a definition if the new |
1176 | definition comes from a shared library. */ | |
707bba77 AM |
1177 | olddef = (h->root.type != bfd_link_hash_undefined |
1178 | && h->root.type != bfd_link_hash_undefweak | |
07492f66 L |
1179 | && (h->root.type != bfd_link_hash_common |
1180 | || (!olddyn && newdyn && bfd_link_executable (info)))); | |
45d6a902 | 1181 | |
0a36a439 L |
1182 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1183 | respectively, appear to be a function. */ | |
1184 | ||
1185 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1186 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1187 | ||
1188 | oldfunc = (h->type != STT_NOTYPE | |
1189 | && bed->is_function_type (h->type)); | |
1190 | ||
580a2b6e L |
1191 | /* When we try to create a default indirect symbol from the dynamic |
1192 | definition with the default version, we skip it if its type and | |
40101021 | 1193 | the type of existing regular definition mismatch. */ |
580a2b6e | 1194 | if (pold_alignment == NULL |
580a2b6e L |
1195 | && newdyn |
1196 | && newdef | |
1197 | && !olddyn | |
4584ec12 L |
1198 | && (((olddef || h->root.type == bfd_link_hash_common) |
1199 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1200 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1201 | && h->type != STT_NOTYPE | |
1202 | && !(newfunc && oldfunc)) | |
1203 | || (olddef | |
1204 | && ((h->type == STT_GNU_IFUNC) | |
1205 | != (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))))) | |
580a2b6e L |
1206 | { |
1207 | *skip = TRUE; | |
1208 | return TRUE; | |
1209 | } | |
1210 | ||
4c34aff8 AM |
1211 | /* Check TLS symbols. We don't check undefined symbols introduced |
1212 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1213 | check symbols from plugins because they also have no type. */ | |
1214 | if (oldbfd != NULL | |
1215 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1216 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1217 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1218 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1219 | { |
1220 | bfd *ntbfd, *tbfd; | |
1221 | bfd_boolean ntdef, tdef; | |
1222 | asection *ntsec, *tsec; | |
1223 | ||
1224 | if (h->type == STT_TLS) | |
1225 | { | |
3b36f7e6 | 1226 | ntbfd = abfd; |
7479dfd4 L |
1227 | ntsec = sec; |
1228 | ntdef = newdef; | |
1229 | tbfd = oldbfd; | |
1230 | tsec = oldsec; | |
1231 | tdef = olddef; | |
1232 | } | |
1233 | else | |
1234 | { | |
1235 | ntbfd = oldbfd; | |
1236 | ntsec = oldsec; | |
1237 | ntdef = olddef; | |
1238 | tbfd = abfd; | |
1239 | tsec = sec; | |
1240 | tdef = newdef; | |
1241 | } | |
1242 | ||
1243 | if (tdef && ntdef) | |
1244 | (*_bfd_error_handler) | |
191c0c42 AM |
1245 | (_("%s: TLS definition in %B section %A " |
1246 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1247 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1248 | else if (!tdef && !ntdef) | |
1249 | (*_bfd_error_handler) | |
191c0c42 AM |
1250 | (_("%s: TLS reference in %B " |
1251 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1252 | tbfd, ntbfd, h->root.root.string); |
1253 | else if (tdef) | |
1254 | (*_bfd_error_handler) | |
191c0c42 AM |
1255 | (_("%s: TLS definition in %B section %A " |
1256 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1257 | tbfd, tsec, ntbfd, h->root.root.string); |
1258 | else | |
1259 | (*_bfd_error_handler) | |
191c0c42 AM |
1260 | (_("%s: TLS reference in %B " |
1261 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1262 | tbfd, ntbfd, ntsec, h->root.root.string); |
1263 | ||
1264 | bfd_set_error (bfd_error_bad_value); | |
1265 | return FALSE; | |
1266 | } | |
1267 | ||
45d6a902 AM |
1268 | /* If the old symbol has non-default visibility, we ignore the new |
1269 | definition from a dynamic object. */ | |
1270 | if (newdyn | |
9c7a29a3 | 1271 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1272 | && !bfd_is_und_section (sec)) |
1273 | { | |
1274 | *skip = TRUE; | |
1275 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1276 | h->ref_dynamic = 1; |
90c984fc | 1277 | hi->ref_dynamic = 1; |
45d6a902 AM |
1278 | /* A protected symbol has external availability. Make sure it is |
1279 | recorded as dynamic. | |
1280 | ||
1281 | FIXME: Should we check type and size for protected symbol? */ | |
1282 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1283 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1284 | else |
1285 | return TRUE; | |
1286 | } | |
1287 | else if (!newdyn | |
9c7a29a3 | 1288 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1289 | && h->def_dynamic) |
45d6a902 AM |
1290 | { |
1291 | /* If the new symbol with non-default visibility comes from a | |
1292 | relocatable file and the old definition comes from a dynamic | |
1293 | object, we remove the old definition. */ | |
6c9b78e6 | 1294 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1295 | { |
1296 | /* Handle the case where the old dynamic definition is | |
1297 | default versioned. We need to copy the symbol info from | |
1298 | the symbol with default version to the normal one if it | |
1299 | was referenced before. */ | |
1300 | if (h->ref_regular) | |
1301 | { | |
6c9b78e6 | 1302 | hi->root.type = h->root.type; |
d2dee3b2 | 1303 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1304 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1305 | |
6c9b78e6 | 1306 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1307 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1308 | { |
aed81c4e MR |
1309 | /* If the new symbol is hidden or internal, completely undo |
1310 | any dynamic link state. */ | |
1311 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1312 | h->forced_local = 0; | |
1313 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1314 | } |
1315 | else | |
aed81c4e MR |
1316 | h->ref_dynamic = 1; |
1317 | ||
1318 | h->def_dynamic = 0; | |
aed81c4e MR |
1319 | /* FIXME: Should we check type and size for protected symbol? */ |
1320 | h->size = 0; | |
1321 | h->type = 0; | |
1322 | ||
6c9b78e6 | 1323 | h = hi; |
d2dee3b2 L |
1324 | } |
1325 | else | |
6c9b78e6 | 1326 | h = hi; |
d2dee3b2 | 1327 | } |
1de1a317 | 1328 | |
f5eda473 AM |
1329 | /* If the old symbol was undefined before, then it will still be |
1330 | on the undefs list. If the new symbol is undefined or | |
1331 | common, we can't make it bfd_link_hash_new here, because new | |
1332 | undefined or common symbols will be added to the undefs list | |
1333 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1334 | added twice to the undefs list. Also, if the new symbol is | |
1335 | undefweak then we don't want to lose the strong undef. */ | |
1336 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1337 | { |
1de1a317 | 1338 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1339 | h->root.u.undef.abfd = abfd; |
1340 | } | |
1341 | else | |
1342 | { | |
1343 | h->root.type = bfd_link_hash_new; | |
1344 | h->root.u.undef.abfd = NULL; | |
1345 | } | |
1346 | ||
f5eda473 | 1347 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1348 | { |
f5eda473 AM |
1349 | /* If the new symbol is hidden or internal, completely undo |
1350 | any dynamic link state. */ | |
1351 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1352 | h->forced_local = 0; | |
1353 | h->ref_dynamic = 0; | |
45d6a902 | 1354 | } |
f5eda473 AM |
1355 | else |
1356 | h->ref_dynamic = 1; | |
1357 | h->def_dynamic = 0; | |
45d6a902 AM |
1358 | /* FIXME: Should we check type and size for protected symbol? */ |
1359 | h->size = 0; | |
1360 | h->type = 0; | |
1361 | return TRUE; | |
1362 | } | |
14a793b2 | 1363 | |
15b43f48 AM |
1364 | /* If a new weak symbol definition comes from a regular file and the |
1365 | old symbol comes from a dynamic library, we treat the new one as | |
1366 | strong. Similarly, an old weak symbol definition from a regular | |
1367 | file is treated as strong when the new symbol comes from a dynamic | |
1368 | library. Further, an old weak symbol from a dynamic library is | |
1369 | treated as strong if the new symbol is from a dynamic library. | |
1370 | This reflects the way glibc's ld.so works. | |
1371 | ||
1372 | Do this before setting *type_change_ok or *size_change_ok so that | |
1373 | we warn properly when dynamic library symbols are overridden. */ | |
1374 | ||
1375 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1376 | newweak = FALSE; |
15b43f48 | 1377 | if (olddef && newdyn) |
0f8a2703 AM |
1378 | oldweak = FALSE; |
1379 | ||
d334575b | 1380 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1381 | if (newfunc && oldfunc) |
fcb93ecf PB |
1382 | *type_change_ok = TRUE; |
1383 | ||
79349b09 AM |
1384 | /* It's OK to change the type if either the existing symbol or the |
1385 | new symbol is weak. A type change is also OK if the old symbol | |
1386 | is undefined and the new symbol is defined. */ | |
252b5132 | 1387 | |
79349b09 AM |
1388 | if (oldweak |
1389 | || newweak | |
1390 | || (newdef | |
1391 | && h->root.type == bfd_link_hash_undefined)) | |
1392 | *type_change_ok = TRUE; | |
1393 | ||
1394 | /* It's OK to change the size if either the existing symbol or the | |
1395 | new symbol is weak, or if the old symbol is undefined. */ | |
1396 | ||
1397 | if (*type_change_ok | |
1398 | || h->root.type == bfd_link_hash_undefined) | |
1399 | *size_change_ok = TRUE; | |
45d6a902 | 1400 | |
45d6a902 AM |
1401 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1402 | symbol, respectively, appears to be a common symbol in a dynamic | |
1403 | object. If a symbol appears in an uninitialized section, and is | |
1404 | not weak, and is not a function, then it may be a common symbol | |
1405 | which was resolved when the dynamic object was created. We want | |
1406 | to treat such symbols specially, because they raise special | |
1407 | considerations when setting the symbol size: if the symbol | |
1408 | appears as a common symbol in a regular object, and the size in | |
1409 | the regular object is larger, we must make sure that we use the | |
1410 | larger size. This problematic case can always be avoided in C, | |
1411 | but it must be handled correctly when using Fortran shared | |
1412 | libraries. | |
1413 | ||
1414 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1415 | likewise for OLDDYNCOMMON and OLDDEF. | |
1416 | ||
1417 | Note that this test is just a heuristic, and that it is quite | |
1418 | possible to have an uninitialized symbol in a shared object which | |
1419 | is really a definition, rather than a common symbol. This could | |
1420 | lead to some minor confusion when the symbol really is a common | |
1421 | symbol in some regular object. However, I think it will be | |
1422 | harmless. */ | |
1423 | ||
1424 | if (newdyn | |
1425 | && newdef | |
79349b09 | 1426 | && !newweak |
45d6a902 AM |
1427 | && (sec->flags & SEC_ALLOC) != 0 |
1428 | && (sec->flags & SEC_LOAD) == 0 | |
1429 | && sym->st_size > 0 | |
0a36a439 | 1430 | && !newfunc) |
45d6a902 AM |
1431 | newdyncommon = TRUE; |
1432 | else | |
1433 | newdyncommon = FALSE; | |
1434 | ||
1435 | if (olddyn | |
1436 | && olddef | |
1437 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1438 | && h->def_dynamic |
45d6a902 AM |
1439 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1440 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1441 | && h->size > 0 | |
0a36a439 | 1442 | && !oldfunc) |
45d6a902 AM |
1443 | olddyncommon = TRUE; |
1444 | else | |
1445 | olddyncommon = FALSE; | |
1446 | ||
a4d8e49b L |
1447 | /* We now know everything about the old and new symbols. We ask the |
1448 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1449 | if (bed->merge_symbol != NULL) |
1450 | { | |
1451 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1452 | return FALSE; | |
1453 | sec = *psec; | |
1454 | } | |
a4d8e49b | 1455 | |
45d6a902 AM |
1456 | /* If both the old and the new symbols look like common symbols in a |
1457 | dynamic object, set the size of the symbol to the larger of the | |
1458 | two. */ | |
1459 | ||
1460 | if (olddyncommon | |
1461 | && newdyncommon | |
1462 | && sym->st_size != h->size) | |
1463 | { | |
1464 | /* Since we think we have two common symbols, issue a multiple | |
1465 | common warning if desired. Note that we only warn if the | |
1466 | size is different. If the size is the same, we simply let | |
1467 | the old symbol override the new one as normally happens with | |
1468 | symbols defined in dynamic objects. */ | |
1469 | ||
1470 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1471 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 | 1472 | return FALSE; |
252b5132 | 1473 | |
45d6a902 AM |
1474 | if (sym->st_size > h->size) |
1475 | h->size = sym->st_size; | |
252b5132 | 1476 | |
45d6a902 | 1477 | *size_change_ok = TRUE; |
252b5132 RH |
1478 | } |
1479 | ||
45d6a902 AM |
1480 | /* If we are looking at a dynamic object, and we have found a |
1481 | definition, we need to see if the symbol was already defined by | |
1482 | some other object. If so, we want to use the existing | |
1483 | definition, and we do not want to report a multiple symbol | |
1484 | definition error; we do this by clobbering *PSEC to be | |
1485 | bfd_und_section_ptr. | |
1486 | ||
1487 | We treat a common symbol as a definition if the symbol in the | |
1488 | shared library is a function, since common symbols always | |
1489 | represent variables; this can cause confusion in principle, but | |
1490 | any such confusion would seem to indicate an erroneous program or | |
1491 | shared library. We also permit a common symbol in a regular | |
79349b09 | 1492 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1493 | |
1494 | if (newdyn | |
1495 | && newdef | |
77cfaee6 | 1496 | && (olddef |
45d6a902 | 1497 | || (h->root.type == bfd_link_hash_common |
0a36a439 | 1498 | && (newweak || newfunc)))) |
45d6a902 AM |
1499 | { |
1500 | *override = TRUE; | |
1501 | newdef = FALSE; | |
1502 | newdyncommon = FALSE; | |
252b5132 | 1503 | |
45d6a902 AM |
1504 | *psec = sec = bfd_und_section_ptr; |
1505 | *size_change_ok = TRUE; | |
252b5132 | 1506 | |
45d6a902 AM |
1507 | /* If we get here when the old symbol is a common symbol, then |
1508 | we are explicitly letting it override a weak symbol or | |
1509 | function in a dynamic object, and we don't want to warn about | |
1510 | a type change. If the old symbol is a defined symbol, a type | |
1511 | change warning may still be appropriate. */ | |
252b5132 | 1512 | |
45d6a902 AM |
1513 | if (h->root.type == bfd_link_hash_common) |
1514 | *type_change_ok = TRUE; | |
1515 | } | |
1516 | ||
1517 | /* Handle the special case of an old common symbol merging with a | |
1518 | new symbol which looks like a common symbol in a shared object. | |
1519 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1520 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1521 | right thing. */ | |
45d6a902 AM |
1522 | |
1523 | if (newdyncommon | |
1524 | && h->root.type == bfd_link_hash_common) | |
1525 | { | |
1526 | *override = TRUE; | |
1527 | newdef = FALSE; | |
1528 | newdyncommon = FALSE; | |
1529 | *pvalue = sym->st_size; | |
a4d8e49b | 1530 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1531 | *size_change_ok = TRUE; |
1532 | } | |
1533 | ||
c5e2cead | 1534 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1535 | if (newdef && olddef && newweak) |
54ac0771 | 1536 | { |
35ed3f94 | 1537 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1538 | if (!(oldbfd != NULL |
1539 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1540 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1541 | { |
1542 | newdef = FALSE; | |
1543 | *skip = TRUE; | |
1544 | } | |
54ac0771 L |
1545 | |
1546 | /* Merge st_other. If the symbol already has a dynamic index, | |
1547 | but visibility says it should not be visible, turn it into a | |
1548 | local symbol. */ | |
b8417128 | 1549 | elf_merge_st_other (abfd, h, sym, sec, newdef, newdyn); |
54ac0771 L |
1550 | if (h->dynindx != -1) |
1551 | switch (ELF_ST_VISIBILITY (h->other)) | |
1552 | { | |
1553 | case STV_INTERNAL: | |
1554 | case STV_HIDDEN: | |
1555 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1556 | break; | |
1557 | } | |
1558 | } | |
c5e2cead | 1559 | |
45d6a902 AM |
1560 | /* If the old symbol is from a dynamic object, and the new symbol is |
1561 | a definition which is not from a dynamic object, then the new | |
1562 | symbol overrides the old symbol. Symbols from regular files | |
1563 | always take precedence over symbols from dynamic objects, even if | |
1564 | they are defined after the dynamic object in the link. | |
1565 | ||
1566 | As above, we again permit a common symbol in a regular object to | |
1567 | override a definition in a shared object if the shared object | |
0f8a2703 | 1568 | symbol is a function or is weak. */ |
45d6a902 AM |
1569 | |
1570 | flip = NULL; | |
77cfaee6 | 1571 | if (!newdyn |
45d6a902 AM |
1572 | && (newdef |
1573 | || (bfd_is_com_section (sec) | |
0a36a439 | 1574 | && (oldweak || oldfunc))) |
45d6a902 AM |
1575 | && olddyn |
1576 | && olddef | |
f5385ebf | 1577 | && h->def_dynamic) |
45d6a902 AM |
1578 | { |
1579 | /* Change the hash table entry to undefined, and let | |
1580 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1581 | new definition. */ | |
1582 | ||
1583 | h->root.type = bfd_link_hash_undefined; | |
1584 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1585 | *size_change_ok = TRUE; | |
1586 | ||
1587 | olddef = FALSE; | |
1588 | olddyncommon = FALSE; | |
1589 | ||
1590 | /* We again permit a type change when a common symbol may be | |
1591 | overriding a function. */ | |
1592 | ||
1593 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1594 | { |
1595 | if (oldfunc) | |
1596 | { | |
1597 | /* If a common symbol overrides a function, make sure | |
1598 | that it isn't defined dynamically nor has type | |
1599 | function. */ | |
1600 | h->def_dynamic = 0; | |
1601 | h->type = STT_NOTYPE; | |
1602 | } | |
1603 | *type_change_ok = TRUE; | |
1604 | } | |
45d6a902 | 1605 | |
6c9b78e6 AM |
1606 | if (hi->root.type == bfd_link_hash_indirect) |
1607 | flip = hi; | |
45d6a902 AM |
1608 | else |
1609 | /* This union may have been set to be non-NULL when this symbol | |
1610 | was seen in a dynamic object. We must force the union to be | |
1611 | NULL, so that it is correct for a regular symbol. */ | |
1612 | h->verinfo.vertree = NULL; | |
1613 | } | |
1614 | ||
1615 | /* Handle the special case of a new common symbol merging with an | |
1616 | old symbol that looks like it might be a common symbol defined in | |
1617 | a shared object. Note that we have already handled the case in | |
1618 | which a new common symbol should simply override the definition | |
1619 | in the shared library. */ | |
1620 | ||
1621 | if (! newdyn | |
1622 | && bfd_is_com_section (sec) | |
1623 | && olddyncommon) | |
1624 | { | |
1625 | /* It would be best if we could set the hash table entry to a | |
1626 | common symbol, but we don't know what to use for the section | |
1627 | or the alignment. */ | |
1628 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1629 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 AM |
1630 | return FALSE; |
1631 | ||
4cc11e76 | 1632 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1633 | larger, pretend that the new symbol has its size. */ |
1634 | ||
1635 | if (h->size > *pvalue) | |
1636 | *pvalue = h->size; | |
1637 | ||
af44c138 L |
1638 | /* We need to remember the alignment required by the symbol |
1639 | in the dynamic object. */ | |
1640 | BFD_ASSERT (pold_alignment); | |
1641 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1642 | |
1643 | olddef = FALSE; | |
1644 | olddyncommon = FALSE; | |
1645 | ||
1646 | h->root.type = bfd_link_hash_undefined; | |
1647 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1648 | ||
1649 | *size_change_ok = TRUE; | |
1650 | *type_change_ok = TRUE; | |
1651 | ||
6c9b78e6 AM |
1652 | if (hi->root.type == bfd_link_hash_indirect) |
1653 | flip = hi; | |
45d6a902 AM |
1654 | else |
1655 | h->verinfo.vertree = NULL; | |
1656 | } | |
1657 | ||
1658 | if (flip != NULL) | |
1659 | { | |
1660 | /* Handle the case where we had a versioned symbol in a dynamic | |
1661 | library and now find a definition in a normal object. In this | |
1662 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1663 | flip->root.type = h->root.type; |
00cbee0a | 1664 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1665 | h->root.type = bfd_link_hash_indirect; |
1666 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1667 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1668 | if (h->def_dynamic) |
45d6a902 | 1669 | { |
f5385ebf AM |
1670 | h->def_dynamic = 0; |
1671 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1672 | } |
1673 | } | |
1674 | ||
45d6a902 AM |
1675 | return TRUE; |
1676 | } | |
1677 | ||
1678 | /* This function is called to create an indirect symbol from the | |
1679 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1680 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1681 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1682 | |
28caa186 | 1683 | static bfd_boolean |
268b6b39 AM |
1684 | _bfd_elf_add_default_symbol (bfd *abfd, |
1685 | struct bfd_link_info *info, | |
1686 | struct elf_link_hash_entry *h, | |
1687 | const char *name, | |
1688 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1689 | asection *sec, |
1690 | bfd_vma value, | |
1691 | bfd **poldbfd, | |
e3c9d234 | 1692 | bfd_boolean *dynsym) |
45d6a902 AM |
1693 | { |
1694 | bfd_boolean type_change_ok; | |
1695 | bfd_boolean size_change_ok; | |
1696 | bfd_boolean skip; | |
1697 | char *shortname; | |
1698 | struct elf_link_hash_entry *hi; | |
1699 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1700 | const struct elf_backend_data *bed; |
45d6a902 AM |
1701 | bfd_boolean collect; |
1702 | bfd_boolean dynamic; | |
e3c9d234 | 1703 | bfd_boolean override; |
45d6a902 AM |
1704 | char *p; |
1705 | size_t len, shortlen; | |
ffd65175 | 1706 | asection *tmp_sec; |
6e33951e | 1707 | bfd_boolean matched; |
45d6a902 | 1708 | |
422f1182 L |
1709 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
1710 | return TRUE; | |
1711 | ||
45d6a902 AM |
1712 | /* If this symbol has a version, and it is the default version, we |
1713 | create an indirect symbol from the default name to the fully | |
1714 | decorated name. This will cause external references which do not | |
1715 | specify a version to be bound to this version of the symbol. */ | |
1716 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1717 | if (h->versioned == unknown) |
1718 | { | |
1719 | if (p == NULL) | |
1720 | { | |
1721 | h->versioned = unversioned; | |
1722 | return TRUE; | |
1723 | } | |
1724 | else | |
1725 | { | |
1726 | if (p[1] != ELF_VER_CHR) | |
1727 | { | |
1728 | h->versioned = versioned_hidden; | |
1729 | return TRUE; | |
1730 | } | |
1731 | else | |
1732 | h->versioned = versioned; | |
1733 | } | |
1734 | } | |
4373f8af L |
1735 | else |
1736 | { | |
1737 | /* PR ld/19073: We may see an unversioned definition after the | |
1738 | default version. */ | |
1739 | if (p == NULL) | |
1740 | return TRUE; | |
1741 | } | |
45d6a902 | 1742 | |
45d6a902 AM |
1743 | bed = get_elf_backend_data (abfd); |
1744 | collect = bed->collect; | |
1745 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1746 | ||
1747 | shortlen = p - name; | |
a50b1753 | 1748 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1749 | if (shortname == NULL) |
1750 | return FALSE; | |
1751 | memcpy (shortname, name, shortlen); | |
1752 | shortname[shortlen] = '\0'; | |
1753 | ||
1754 | /* We are going to create a new symbol. Merge it with any existing | |
1755 | symbol with this name. For the purposes of the merge, act as | |
1756 | though we were defining the symbol we just defined, although we | |
1757 | actually going to define an indirect symbol. */ | |
1758 | type_change_ok = FALSE; | |
1759 | size_change_ok = FALSE; | |
6e33951e | 1760 | matched = TRUE; |
ffd65175 AM |
1761 | tmp_sec = sec; |
1762 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1763 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1764 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1765 | return FALSE; |
1766 | ||
1767 | if (skip) | |
1768 | goto nondefault; | |
1769 | ||
1770 | if (! override) | |
1771 | { | |
c6e8a9a8 | 1772 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1773 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1774 | { |
1775 | bh = &hi->root; | |
1776 | if (! (_bfd_generic_link_add_one_symbol | |
1777 | (info, abfd, shortname, BSF_INDIRECT, | |
1778 | bfd_ind_section_ptr, | |
1779 | 0, name, FALSE, collect, &bh))) | |
1780 | return FALSE; | |
1781 | hi = (struct elf_link_hash_entry *) bh; | |
1782 | } | |
45d6a902 AM |
1783 | } |
1784 | else | |
1785 | { | |
1786 | /* In this case the symbol named SHORTNAME is overriding the | |
1787 | indirect symbol we want to add. We were planning on making | |
1788 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1789 | is the name without a version. NAME is the fully versioned | |
1790 | name, and it is the default version. | |
1791 | ||
1792 | Overriding means that we already saw a definition for the | |
1793 | symbol SHORTNAME in a regular object, and it is overriding | |
1794 | the symbol defined in the dynamic object. | |
1795 | ||
1796 | When this happens, we actually want to change NAME, the | |
1797 | symbol we just added, to refer to SHORTNAME. This will cause | |
1798 | references to NAME in the shared object to become references | |
1799 | to SHORTNAME in the regular object. This is what we expect | |
1800 | when we override a function in a shared object: that the | |
1801 | references in the shared object will be mapped to the | |
1802 | definition in the regular object. */ | |
1803 | ||
1804 | while (hi->root.type == bfd_link_hash_indirect | |
1805 | || hi->root.type == bfd_link_hash_warning) | |
1806 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1807 | ||
1808 | h->root.type = bfd_link_hash_indirect; | |
1809 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1810 | if (h->def_dynamic) |
45d6a902 | 1811 | { |
f5385ebf AM |
1812 | h->def_dynamic = 0; |
1813 | hi->ref_dynamic = 1; | |
1814 | if (hi->ref_regular | |
1815 | || hi->def_regular) | |
45d6a902 | 1816 | { |
c152c796 | 1817 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1818 | return FALSE; |
1819 | } | |
1820 | } | |
1821 | ||
1822 | /* Now set HI to H, so that the following code will set the | |
1823 | other fields correctly. */ | |
1824 | hi = h; | |
1825 | } | |
1826 | ||
fab4a87f L |
1827 | /* Check if HI is a warning symbol. */ |
1828 | if (hi->root.type == bfd_link_hash_warning) | |
1829 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1830 | ||
45d6a902 AM |
1831 | /* If there is a duplicate definition somewhere, then HI may not |
1832 | point to an indirect symbol. We will have reported an error to | |
1833 | the user in that case. */ | |
1834 | ||
1835 | if (hi->root.type == bfd_link_hash_indirect) | |
1836 | { | |
1837 | struct elf_link_hash_entry *ht; | |
1838 | ||
45d6a902 | 1839 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1840 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 1841 | |
68c88cd4 AM |
1842 | /* A reference to the SHORTNAME symbol from a dynamic library |
1843 | will be satisfied by the versioned symbol at runtime. In | |
1844 | effect, we have a reference to the versioned symbol. */ | |
1845 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
1846 | hi->dynamic_def |= ht->dynamic_def; | |
1847 | ||
45d6a902 AM |
1848 | /* See if the new flags lead us to realize that the symbol must |
1849 | be dynamic. */ | |
1850 | if (! *dynsym) | |
1851 | { | |
1852 | if (! dynamic) | |
1853 | { | |
0e1862bb | 1854 | if (! bfd_link_executable (info) |
90c984fc | 1855 | || hi->def_dynamic |
f5385ebf | 1856 | || hi->ref_dynamic) |
45d6a902 AM |
1857 | *dynsym = TRUE; |
1858 | } | |
1859 | else | |
1860 | { | |
f5385ebf | 1861 | if (hi->ref_regular) |
45d6a902 AM |
1862 | *dynsym = TRUE; |
1863 | } | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | /* We also need to define an indirection from the nondefault version | |
1868 | of the symbol. */ | |
1869 | ||
1870 | nondefault: | |
1871 | len = strlen (name); | |
a50b1753 | 1872 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1873 | if (shortname == NULL) |
1874 | return FALSE; | |
1875 | memcpy (shortname, name, shortlen); | |
1876 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1877 | ||
1878 | /* Once again, merge with any existing symbol. */ | |
1879 | type_change_ok = FALSE; | |
1880 | size_change_ok = FALSE; | |
ffd65175 AM |
1881 | tmp_sec = sec; |
1882 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 1883 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1884 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1885 | return FALSE; |
1886 | ||
1887 | if (skip) | |
1888 | return TRUE; | |
1889 | ||
1890 | if (override) | |
1891 | { | |
1892 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1893 | the type of override we do in the case above unless it is | |
4cc11e76 | 1894 | overridden by a versioned definition. */ |
45d6a902 AM |
1895 | if (hi->root.type != bfd_link_hash_defined |
1896 | && hi->root.type != bfd_link_hash_defweak) | |
1897 | (*_bfd_error_handler) | |
d003868e AM |
1898 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1899 | abfd, shortname); | |
45d6a902 AM |
1900 | } |
1901 | else | |
1902 | { | |
1903 | bh = &hi->root; | |
1904 | if (! (_bfd_generic_link_add_one_symbol | |
1905 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1906 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1907 | return FALSE; |
1908 | hi = (struct elf_link_hash_entry *) bh; | |
1909 | ||
1910 | /* If there is a duplicate definition somewhere, then HI may not | |
1911 | point to an indirect symbol. We will have reported an error | |
1912 | to the user in that case. */ | |
1913 | ||
1914 | if (hi->root.type == bfd_link_hash_indirect) | |
1915 | { | |
fcfa13d2 | 1916 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
1917 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
1918 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
1919 | |
1920 | /* See if the new flags lead us to realize that the symbol | |
1921 | must be dynamic. */ | |
1922 | if (! *dynsym) | |
1923 | { | |
1924 | if (! dynamic) | |
1925 | { | |
0e1862bb | 1926 | if (! bfd_link_executable (info) |
f5385ebf | 1927 | || hi->ref_dynamic) |
45d6a902 AM |
1928 | *dynsym = TRUE; |
1929 | } | |
1930 | else | |
1931 | { | |
f5385ebf | 1932 | if (hi->ref_regular) |
45d6a902 AM |
1933 | *dynsym = TRUE; |
1934 | } | |
1935 | } | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | return TRUE; | |
1940 | } | |
1941 | \f | |
1942 | /* This routine is used to export all defined symbols into the dynamic | |
1943 | symbol table. It is called via elf_link_hash_traverse. */ | |
1944 | ||
28caa186 | 1945 | static bfd_boolean |
268b6b39 | 1946 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1947 | { |
a50b1753 | 1948 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
1949 | |
1950 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
1951 | if (h->root.type == bfd_link_hash_indirect) | |
1952 | return TRUE; | |
1953 | ||
7686d77d AM |
1954 | /* Ignore this if we won't export it. */ |
1955 | if (!eif->info->export_dynamic && !h->dynamic) | |
1956 | return TRUE; | |
45d6a902 AM |
1957 | |
1958 | if (h->dynindx == -1 | |
fd91d419 L |
1959 | && (h->def_regular || h->ref_regular) |
1960 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
1961 | h->root.root.string)) | |
45d6a902 | 1962 | { |
fd91d419 | 1963 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 1964 | { |
fd91d419 L |
1965 | eif->failed = TRUE; |
1966 | return FALSE; | |
45d6a902 AM |
1967 | } |
1968 | } | |
1969 | ||
1970 | return TRUE; | |
1971 | } | |
1972 | \f | |
1973 | /* Look through the symbols which are defined in other shared | |
1974 | libraries and referenced here. Update the list of version | |
1975 | dependencies. This will be put into the .gnu.version_r section. | |
1976 | This function is called via elf_link_hash_traverse. */ | |
1977 | ||
28caa186 | 1978 | static bfd_boolean |
268b6b39 AM |
1979 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
1980 | void *data) | |
45d6a902 | 1981 | { |
a50b1753 | 1982 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
1983 | Elf_Internal_Verneed *t; |
1984 | Elf_Internal_Vernaux *a; | |
1985 | bfd_size_type amt; | |
1986 | ||
45d6a902 AM |
1987 | /* We only care about symbols defined in shared objects with version |
1988 | information. */ | |
f5385ebf AM |
1989 | if (!h->def_dynamic |
1990 | || h->def_regular | |
45d6a902 | 1991 | || h->dynindx == -1 |
7b20f099 AM |
1992 | || h->verinfo.verdef == NULL |
1993 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
1994 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
45d6a902 AM |
1995 | return TRUE; |
1996 | ||
1997 | /* See if we already know about this version. */ | |
28caa186 AM |
1998 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
1999 | t != NULL; | |
2000 | t = t->vn_nextref) | |
45d6a902 AM |
2001 | { |
2002 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
2003 | continue; | |
2004 | ||
2005 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2006 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2007 | return TRUE; | |
2008 | ||
2009 | break; | |
2010 | } | |
2011 | ||
2012 | /* This is a new version. Add it to tree we are building. */ | |
2013 | ||
2014 | if (t == NULL) | |
2015 | { | |
2016 | amt = sizeof *t; | |
a50b1753 | 2017 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
2018 | if (t == NULL) |
2019 | { | |
2020 | rinfo->failed = TRUE; | |
2021 | return FALSE; | |
2022 | } | |
2023 | ||
2024 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2025 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2026 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2027 | } |
2028 | ||
2029 | amt = sizeof *a; | |
a50b1753 | 2030 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2031 | if (a == NULL) |
2032 | { | |
2033 | rinfo->failed = TRUE; | |
2034 | return FALSE; | |
2035 | } | |
45d6a902 AM |
2036 | |
2037 | /* Note that we are copying a string pointer here, and testing it | |
2038 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2039 | discard the string data when low in memory, this will have to be | |
2040 | fixed. */ | |
2041 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2042 | ||
2043 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2044 | a->vna_nextptr = t->vn_auxptr; | |
2045 | ||
2046 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2047 | ++rinfo->vers; | |
2048 | ||
2049 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2050 | ||
2051 | t->vn_auxptr = a; | |
2052 | ||
2053 | return TRUE; | |
2054 | } | |
2055 | ||
2056 | /* Figure out appropriate versions for all the symbols. We may not | |
2057 | have the version number script until we have read all of the input | |
2058 | files, so until that point we don't know which symbols should be | |
2059 | local. This function is called via elf_link_hash_traverse. */ | |
2060 | ||
28caa186 | 2061 | static bfd_boolean |
268b6b39 | 2062 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2063 | { |
28caa186 | 2064 | struct elf_info_failed *sinfo; |
45d6a902 | 2065 | struct bfd_link_info *info; |
9c5bfbb7 | 2066 | const struct elf_backend_data *bed; |
45d6a902 AM |
2067 | struct elf_info_failed eif; |
2068 | char *p; | |
2069 | bfd_size_type amt; | |
2070 | ||
a50b1753 | 2071 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2072 | info = sinfo->info; |
2073 | ||
45d6a902 AM |
2074 | /* Fix the symbol flags. */ |
2075 | eif.failed = FALSE; | |
2076 | eif.info = info; | |
2077 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2078 | { | |
2079 | if (eif.failed) | |
2080 | sinfo->failed = TRUE; | |
2081 | return FALSE; | |
2082 | } | |
2083 | ||
2084 | /* We only need version numbers for symbols defined in regular | |
2085 | objects. */ | |
f5385ebf | 2086 | if (!h->def_regular) |
45d6a902 AM |
2087 | return TRUE; |
2088 | ||
28caa186 | 2089 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
2090 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2091 | if (p != NULL && h->verinfo.vertree == NULL) | |
2092 | { | |
2093 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2094 | |
45d6a902 AM |
2095 | ++p; |
2096 | if (*p == ELF_VER_CHR) | |
6e33951e | 2097 | ++p; |
45d6a902 AM |
2098 | |
2099 | /* If there is no version string, we can just return out. */ | |
2100 | if (*p == '\0') | |
6e33951e | 2101 | return TRUE; |
45d6a902 AM |
2102 | |
2103 | /* Look for the version. If we find it, it is no longer weak. */ | |
fd91d419 | 2104 | for (t = sinfo->info->version_info; t != NULL; t = t->next) |
45d6a902 AM |
2105 | { |
2106 | if (strcmp (t->name, p) == 0) | |
2107 | { | |
2108 | size_t len; | |
2109 | char *alc; | |
2110 | struct bfd_elf_version_expr *d; | |
2111 | ||
2112 | len = p - h->root.root.string; | |
a50b1753 | 2113 | alc = (char *) bfd_malloc (len); |
45d6a902 | 2114 | if (alc == NULL) |
14b1c01e AM |
2115 | { |
2116 | sinfo->failed = TRUE; | |
2117 | return FALSE; | |
2118 | } | |
45d6a902 AM |
2119 | memcpy (alc, h->root.root.string, len - 1); |
2120 | alc[len - 1] = '\0'; | |
2121 | if (alc[len - 2] == ELF_VER_CHR) | |
2122 | alc[len - 2] = '\0'; | |
2123 | ||
2124 | h->verinfo.vertree = t; | |
2125 | t->used = TRUE; | |
2126 | d = NULL; | |
2127 | ||
108ba305 JJ |
2128 | if (t->globals.list != NULL) |
2129 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2130 | |
2131 | /* See if there is anything to force this symbol to | |
2132 | local scope. */ | |
108ba305 | 2133 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2134 | { |
108ba305 JJ |
2135 | d = (*t->match) (&t->locals, NULL, alc); |
2136 | if (d != NULL | |
2137 | && h->dynindx != -1 | |
108ba305 JJ |
2138 | && ! info->export_dynamic) |
2139 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2140 | } |
2141 | ||
2142 | free (alc); | |
2143 | break; | |
2144 | } | |
2145 | } | |
2146 | ||
2147 | /* If we are building an application, we need to create a | |
2148 | version node for this version. */ | |
0e1862bb | 2149 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2150 | { |
2151 | struct bfd_elf_version_tree **pp; | |
2152 | int version_index; | |
2153 | ||
2154 | /* If we aren't going to export this symbol, we don't need | |
2155 | to worry about it. */ | |
2156 | if (h->dynindx == -1) | |
2157 | return TRUE; | |
2158 | ||
2159 | amt = sizeof *t; | |
a50b1753 | 2160 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, amt); |
45d6a902 AM |
2161 | if (t == NULL) |
2162 | { | |
2163 | sinfo->failed = TRUE; | |
2164 | return FALSE; | |
2165 | } | |
2166 | ||
45d6a902 | 2167 | t->name = p; |
45d6a902 AM |
2168 | t->name_indx = (unsigned int) -1; |
2169 | t->used = TRUE; | |
2170 | ||
2171 | version_index = 1; | |
2172 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2173 | if (sinfo->info->version_info != NULL |
2174 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2175 | version_index = 0; |
fd91d419 L |
2176 | for (pp = &sinfo->info->version_info; |
2177 | *pp != NULL; | |
2178 | pp = &(*pp)->next) | |
45d6a902 AM |
2179 | ++version_index; |
2180 | t->vernum = version_index; | |
2181 | ||
2182 | *pp = t; | |
2183 | ||
2184 | h->verinfo.vertree = t; | |
2185 | } | |
2186 | else if (t == NULL) | |
2187 | { | |
2188 | /* We could not find the version for a symbol when | |
2189 | generating a shared archive. Return an error. */ | |
2190 | (*_bfd_error_handler) | |
c55fe096 | 2191 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2192 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2193 | bfd_set_error (bfd_error_bad_value); |
2194 | sinfo->failed = TRUE; | |
2195 | return FALSE; | |
2196 | } | |
45d6a902 AM |
2197 | } |
2198 | ||
2199 | /* If we don't have a version for this symbol, see if we can find | |
2200 | something. */ | |
fd91d419 | 2201 | if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL) |
45d6a902 | 2202 | { |
1e8fa21e | 2203 | bfd_boolean hide; |
ae5a3597 | 2204 | |
fd91d419 L |
2205 | h->verinfo.vertree |
2206 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2207 | h->root.root.string, &hide); | |
1e8fa21e AM |
2208 | if (h->verinfo.vertree != NULL && hide) |
2209 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2210 | } |
2211 | ||
2212 | return TRUE; | |
2213 | } | |
2214 | \f | |
45d6a902 AM |
2215 | /* Read and swap the relocs from the section indicated by SHDR. This |
2216 | may be either a REL or a RELA section. The relocations are | |
2217 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2218 | which should have already been allocated to contain enough space. | |
2219 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2220 | relocations should be stored. | |
2221 | ||
2222 | Returns FALSE if something goes wrong. */ | |
2223 | ||
2224 | static bfd_boolean | |
268b6b39 | 2225 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2226 | asection *sec, |
268b6b39 AM |
2227 | Elf_Internal_Shdr *shdr, |
2228 | void *external_relocs, | |
2229 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2230 | { |
9c5bfbb7 | 2231 | const struct elf_backend_data *bed; |
268b6b39 | 2232 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2233 | const bfd_byte *erela; |
2234 | const bfd_byte *erelaend; | |
2235 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2236 | Elf_Internal_Shdr *symtab_hdr; |
2237 | size_t nsyms; | |
45d6a902 | 2238 | |
45d6a902 AM |
2239 | /* Position ourselves at the start of the section. */ |
2240 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2241 | return FALSE; | |
2242 | ||
2243 | /* Read the relocations. */ | |
2244 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2245 | return FALSE; | |
2246 | ||
243ef1e0 | 2247 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2248 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2249 | |
45d6a902 AM |
2250 | bed = get_elf_backend_data (abfd); |
2251 | ||
2252 | /* Convert the external relocations to the internal format. */ | |
2253 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2254 | swap_in = bed->s->swap_reloc_in; | |
2255 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2256 | swap_in = bed->s->swap_reloca_in; | |
2257 | else | |
2258 | { | |
2259 | bfd_set_error (bfd_error_wrong_format); | |
2260 | return FALSE; | |
2261 | } | |
2262 | ||
a50b1753 | 2263 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2264 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2265 | irela = internal_relocs; |
2266 | while (erela < erelaend) | |
2267 | { | |
243ef1e0 L |
2268 | bfd_vma r_symndx; |
2269 | ||
45d6a902 | 2270 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2271 | r_symndx = ELF32_R_SYM (irela->r_info); |
2272 | if (bed->s->arch_size == 64) | |
2273 | r_symndx >>= 24; | |
ce98a316 NC |
2274 | if (nsyms > 0) |
2275 | { | |
2276 | if ((size_t) r_symndx >= nsyms) | |
2277 | { | |
2278 | (*_bfd_error_handler) | |
2279 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" | |
2280 | " for offset 0x%lx in section `%A'"), | |
2281 | abfd, sec, | |
2282 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2283 | bfd_set_error (bfd_error_bad_value); | |
2284 | return FALSE; | |
2285 | } | |
2286 | } | |
cf35638d | 2287 | else if (r_symndx != STN_UNDEF) |
243ef1e0 L |
2288 | { |
2289 | (*_bfd_error_handler) | |
ce98a316 NC |
2290 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2291 | " when the object file has no symbol table"), | |
d003868e AM |
2292 | abfd, sec, |
2293 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2294 | bfd_set_error (bfd_error_bad_value); |
2295 | return FALSE; | |
2296 | } | |
45d6a902 AM |
2297 | irela += bed->s->int_rels_per_ext_rel; |
2298 | erela += shdr->sh_entsize; | |
2299 | } | |
2300 | ||
2301 | return TRUE; | |
2302 | } | |
2303 | ||
2304 | /* Read and swap the relocs for a section O. They may have been | |
2305 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2306 | not NULL, they are used as buffers to read into. They are known to | |
2307 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2308 | the return value is allocated using either malloc or bfd_alloc, | |
2309 | according to the KEEP_MEMORY argument. If O has two relocation | |
2310 | sections (both REL and RELA relocations), then the REL_HDR | |
2311 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2312 | RELA_HDR relocations. */ |
45d6a902 AM |
2313 | |
2314 | Elf_Internal_Rela * | |
268b6b39 AM |
2315 | _bfd_elf_link_read_relocs (bfd *abfd, |
2316 | asection *o, | |
2317 | void *external_relocs, | |
2318 | Elf_Internal_Rela *internal_relocs, | |
2319 | bfd_boolean keep_memory) | |
45d6a902 | 2320 | { |
268b6b39 | 2321 | void *alloc1 = NULL; |
45d6a902 | 2322 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2323 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2324 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2325 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2326 | |
d4730f92 BS |
2327 | if (esdo->relocs != NULL) |
2328 | return esdo->relocs; | |
45d6a902 AM |
2329 | |
2330 | if (o->reloc_count == 0) | |
2331 | return NULL; | |
2332 | ||
45d6a902 AM |
2333 | if (internal_relocs == NULL) |
2334 | { | |
2335 | bfd_size_type size; | |
2336 | ||
2337 | size = o->reloc_count; | |
2338 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2339 | if (keep_memory) | |
a50b1753 | 2340 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2341 | else |
a50b1753 | 2342 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2343 | if (internal_relocs == NULL) |
2344 | goto error_return; | |
2345 | } | |
2346 | ||
2347 | if (external_relocs == NULL) | |
2348 | { | |
d4730f92 BS |
2349 | bfd_size_type size = 0; |
2350 | ||
2351 | if (esdo->rel.hdr) | |
2352 | size += esdo->rel.hdr->sh_size; | |
2353 | if (esdo->rela.hdr) | |
2354 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2355 | |
268b6b39 | 2356 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2357 | if (alloc1 == NULL) |
2358 | goto error_return; | |
2359 | external_relocs = alloc1; | |
2360 | } | |
2361 | ||
d4730f92 BS |
2362 | internal_rela_relocs = internal_relocs; |
2363 | if (esdo->rel.hdr) | |
2364 | { | |
2365 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2366 | external_relocs, | |
2367 | internal_relocs)) | |
2368 | goto error_return; | |
2369 | external_relocs = (((bfd_byte *) external_relocs) | |
2370 | + esdo->rel.hdr->sh_size); | |
2371 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2372 | * bed->s->int_rels_per_ext_rel); | |
2373 | } | |
2374 | ||
2375 | if (esdo->rela.hdr | |
2376 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2377 | external_relocs, | |
2378 | internal_rela_relocs))) | |
45d6a902 AM |
2379 | goto error_return; |
2380 | ||
2381 | /* Cache the results for next time, if we can. */ | |
2382 | if (keep_memory) | |
d4730f92 | 2383 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2384 | |
2385 | if (alloc1 != NULL) | |
2386 | free (alloc1); | |
2387 | ||
2388 | /* Don't free alloc2, since if it was allocated we are passing it | |
2389 | back (under the name of internal_relocs). */ | |
2390 | ||
2391 | return internal_relocs; | |
2392 | ||
2393 | error_return: | |
2394 | if (alloc1 != NULL) | |
2395 | free (alloc1); | |
2396 | if (alloc2 != NULL) | |
4dd07732 AM |
2397 | { |
2398 | if (keep_memory) | |
2399 | bfd_release (abfd, alloc2); | |
2400 | else | |
2401 | free (alloc2); | |
2402 | } | |
45d6a902 AM |
2403 | return NULL; |
2404 | } | |
2405 | ||
2406 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2407 | section header for a section containing relocations for O. */ | |
2408 | ||
28caa186 | 2409 | static bfd_boolean |
268b6b39 | 2410 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
d4730f92 | 2411 | struct bfd_elf_section_reloc_data *reldata) |
45d6a902 | 2412 | { |
d4730f92 | 2413 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2414 | |
2415 | /* That allows us to calculate the size of the section. */ | |
d4730f92 | 2416 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2417 | |
2418 | /* The contents field must last into write_object_contents, so we | |
2419 | allocate it with bfd_alloc rather than malloc. Also since we | |
2420 | cannot be sure that the contents will actually be filled in, | |
2421 | we zero the allocated space. */ | |
a50b1753 | 2422 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2423 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2424 | return FALSE; | |
2425 | ||
d4730f92 | 2426 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2427 | { |
2428 | struct elf_link_hash_entry **p; | |
2429 | ||
ca4be51c AM |
2430 | p = ((struct elf_link_hash_entry **) |
2431 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 AM |
2432 | if (p == NULL) |
2433 | return FALSE; | |
2434 | ||
d4730f92 | 2435 | reldata->hashes = p; |
45d6a902 AM |
2436 | } |
2437 | ||
2438 | return TRUE; | |
2439 | } | |
2440 | ||
2441 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2442 | originated from the section given by INPUT_REL_HDR) to the | |
2443 | OUTPUT_BFD. */ | |
2444 | ||
2445 | bfd_boolean | |
268b6b39 AM |
2446 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2447 | asection *input_section, | |
2448 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2449 | Elf_Internal_Rela *internal_relocs, |
2450 | struct elf_link_hash_entry **rel_hash | |
2451 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2452 | { |
2453 | Elf_Internal_Rela *irela; | |
2454 | Elf_Internal_Rela *irelaend; | |
2455 | bfd_byte *erel; | |
d4730f92 | 2456 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2457 | asection *output_section; |
9c5bfbb7 | 2458 | const struct elf_backend_data *bed; |
268b6b39 | 2459 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2460 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2461 | |
2462 | output_section = input_section->output_section; | |
45d6a902 | 2463 | |
d4730f92 BS |
2464 | bed = get_elf_backend_data (output_bfd); |
2465 | esdo = elf_section_data (output_section); | |
2466 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2467 | { |
d4730f92 BS |
2468 | output_reldata = &esdo->rel; |
2469 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2470 | } |
d4730f92 BS |
2471 | else if (esdo->rela.hdr |
2472 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2473 | { |
d4730f92 BS |
2474 | output_reldata = &esdo->rela; |
2475 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2476 | } |
2477 | else | |
2478 | { | |
2479 | (*_bfd_error_handler) | |
d003868e AM |
2480 | (_("%B: relocation size mismatch in %B section %A"), |
2481 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2482 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2483 | return FALSE; |
2484 | } | |
2485 | ||
d4730f92 BS |
2486 | erel = output_reldata->hdr->contents; |
2487 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2488 | irela = internal_relocs; |
2489 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2490 | * bed->s->int_rels_per_ext_rel); | |
2491 | while (irela < irelaend) | |
2492 | { | |
2493 | (*swap_out) (output_bfd, irela, erel); | |
2494 | irela += bed->s->int_rels_per_ext_rel; | |
2495 | erel += input_rel_hdr->sh_entsize; | |
2496 | } | |
2497 | ||
2498 | /* Bump the counter, so that we know where to add the next set of | |
2499 | relocations. */ | |
d4730f92 | 2500 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2501 | |
2502 | return TRUE; | |
2503 | } | |
2504 | \f | |
508c3946 L |
2505 | /* Make weak undefined symbols in PIE dynamic. */ |
2506 | ||
2507 | bfd_boolean | |
2508 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2509 | struct elf_link_hash_entry *h) | |
2510 | { | |
0e1862bb | 2511 | if (bfd_link_pie (info) |
508c3946 L |
2512 | && h->dynindx == -1 |
2513 | && h->root.type == bfd_link_hash_undefweak) | |
2514 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2515 | ||
2516 | return TRUE; | |
2517 | } | |
2518 | ||
45d6a902 AM |
2519 | /* Fix up the flags for a symbol. This handles various cases which |
2520 | can only be fixed after all the input files are seen. This is | |
2521 | currently called by both adjust_dynamic_symbol and | |
2522 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2523 | the face of future changes. */ | |
2524 | ||
28caa186 | 2525 | static bfd_boolean |
268b6b39 AM |
2526 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2527 | struct elf_info_failed *eif) | |
45d6a902 | 2528 | { |
33774f08 | 2529 | const struct elf_backend_data *bed; |
508c3946 | 2530 | |
45d6a902 AM |
2531 | /* If this symbol was mentioned in a non-ELF file, try to set |
2532 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2533 | permit a non-ELF file to correctly refer to a symbol defined in | |
2534 | an ELF dynamic object. */ | |
f5385ebf | 2535 | if (h->non_elf) |
45d6a902 AM |
2536 | { |
2537 | while (h->root.type == bfd_link_hash_indirect) | |
2538 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2539 | ||
2540 | if (h->root.type != bfd_link_hash_defined | |
2541 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2542 | { |
2543 | h->ref_regular = 1; | |
2544 | h->ref_regular_nonweak = 1; | |
2545 | } | |
45d6a902 AM |
2546 | else |
2547 | { | |
2548 | if (h->root.u.def.section->owner != NULL | |
2549 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2550 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2551 | { |
2552 | h->ref_regular = 1; | |
2553 | h->ref_regular_nonweak = 1; | |
2554 | } | |
45d6a902 | 2555 | else |
f5385ebf | 2556 | h->def_regular = 1; |
45d6a902 AM |
2557 | } |
2558 | ||
2559 | if (h->dynindx == -1 | |
f5385ebf AM |
2560 | && (h->def_dynamic |
2561 | || h->ref_dynamic)) | |
45d6a902 | 2562 | { |
c152c796 | 2563 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2564 | { |
2565 | eif->failed = TRUE; | |
2566 | return FALSE; | |
2567 | } | |
2568 | } | |
2569 | } | |
2570 | else | |
2571 | { | |
f5385ebf | 2572 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2573 | was first seen in a non-ELF file. Fortunately, if the symbol |
2574 | was first seen in an ELF file, we're probably OK unless the | |
2575 | symbol was defined in a non-ELF file. Catch that case here. | |
2576 | FIXME: We're still in trouble if the symbol was first seen in | |
2577 | a dynamic object, and then later in a non-ELF regular object. */ | |
2578 | if ((h->root.type == bfd_link_hash_defined | |
2579 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2580 | && !h->def_regular |
45d6a902 AM |
2581 | && (h->root.u.def.section->owner != NULL |
2582 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2583 | != bfd_target_elf_flavour) | |
2584 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2585 | && !h->def_dynamic))) |
2586 | h->def_regular = 1; | |
45d6a902 AM |
2587 | } |
2588 | ||
508c3946 | 2589 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2590 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2591 | if (bed->elf_backend_fixup_symbol | |
2592 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2593 | return FALSE; | |
508c3946 | 2594 | |
45d6a902 AM |
2595 | /* If this is a final link, and the symbol was defined as a common |
2596 | symbol in a regular object file, and there was no definition in | |
2597 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2598 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2599 | flag will not have been set. */ |
2600 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2601 | && !h->def_regular |
2602 | && h->ref_regular | |
2603 | && !h->def_dynamic | |
96f29d96 | 2604 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2605 | h->def_regular = 1; |
45d6a902 AM |
2606 | |
2607 | /* If -Bsymbolic was used (which means to bind references to global | |
2608 | symbols to the definition within the shared object), and this | |
2609 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2610 | need a PLT entry. Likewise, if the symbol has non-default |
2611 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2612 | will force it local. */ |
f5385ebf | 2613 | if (h->needs_plt |
0e1862bb | 2614 | && bfd_link_pic (eif->info) |
0eddce27 | 2615 | && is_elf_hash_table (eif->info->hash) |
55255dae | 2616 | && (SYMBOLIC_BIND (eif->info, h) |
c1be741f | 2617 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
f5385ebf | 2618 | && h->def_regular) |
45d6a902 | 2619 | { |
45d6a902 AM |
2620 | bfd_boolean force_local; |
2621 | ||
45d6a902 AM |
2622 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2623 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2624 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2625 | } | |
2626 | ||
2627 | /* If a weak undefined symbol has non-default visibility, we also | |
2628 | hide it from the dynamic linker. */ | |
9c7a29a3 | 2629 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 | 2630 | && h->root.type == bfd_link_hash_undefweak) |
33774f08 | 2631 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
45d6a902 AM |
2632 | |
2633 | /* If this is a weak defined symbol in a dynamic object, and we know | |
2634 | the real definition in the dynamic object, copy interesting flags | |
2635 | over to the real definition. */ | |
f6e332e6 | 2636 | if (h->u.weakdef != NULL) |
45d6a902 | 2637 | { |
45d6a902 AM |
2638 | /* If the real definition is defined by a regular object file, |
2639 | don't do anything special. See the longer description in | |
2640 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
4e6b54a6 | 2641 | if (h->u.weakdef->def_regular) |
f6e332e6 | 2642 | h->u.weakdef = NULL; |
45d6a902 | 2643 | else |
a26587ba | 2644 | { |
4e6b54a6 AM |
2645 | struct elf_link_hash_entry *weakdef = h->u.weakdef; |
2646 | ||
2647 | while (h->root.type == bfd_link_hash_indirect) | |
2648 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2649 | ||
2650 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2651 | || h->root.type == bfd_link_hash_defweak); | |
2652 | BFD_ASSERT (weakdef->def_dynamic); | |
a26587ba RS |
2653 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
2654 | || weakdef->root.type == bfd_link_hash_defweak); | |
2655 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2656 | } | |
45d6a902 AM |
2657 | } |
2658 | ||
2659 | return TRUE; | |
2660 | } | |
2661 | ||
2662 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2663 | called via elf_link_hash_traverse, and also calls itself | |
2664 | recursively. */ | |
2665 | ||
28caa186 | 2666 | static bfd_boolean |
268b6b39 | 2667 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2668 | { |
a50b1753 | 2669 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2670 | bfd *dynobj; |
9c5bfbb7 | 2671 | const struct elf_backend_data *bed; |
45d6a902 | 2672 | |
0eddce27 | 2673 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2674 | return FALSE; |
2675 | ||
45d6a902 AM |
2676 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2677 | if (h->root.type == bfd_link_hash_indirect) | |
2678 | return TRUE; | |
2679 | ||
2680 | /* Fix the symbol flags. */ | |
2681 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2682 | return FALSE; | |
2683 | ||
2684 | /* If this symbol does not require a PLT entry, and it is not | |
2685 | defined by a dynamic object, or is not referenced by a regular | |
2686 | object, ignore it. We do have to handle a weak defined symbol, | |
2687 | even if no regular object refers to it, if we decided to add it | |
2688 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2689 | about symbols which are defined by one dynamic object and | |
2690 | referenced by another one? */ | |
f5385ebf | 2691 | if (!h->needs_plt |
91e21fb7 | 2692 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2693 | && (h->def_regular |
2694 | || !h->def_dynamic | |
2695 | || (!h->ref_regular | |
f6e332e6 | 2696 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2697 | { |
a6aa5195 | 2698 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2699 | return TRUE; |
2700 | } | |
2701 | ||
2702 | /* If we've already adjusted this symbol, don't do it again. This | |
2703 | can happen via a recursive call. */ | |
f5385ebf | 2704 | if (h->dynamic_adjusted) |
45d6a902 AM |
2705 | return TRUE; |
2706 | ||
2707 | /* Don't look at this symbol again. Note that we must set this | |
2708 | after checking the above conditions, because we may look at a | |
2709 | symbol once, decide not to do anything, and then get called | |
2710 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2711 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2712 | |
2713 | /* If this is a weak definition, and we know a real definition, and | |
2714 | the real symbol is not itself defined by a regular object file, | |
2715 | then get a good value for the real definition. We handle the | |
2716 | real symbol first, for the convenience of the backend routine. | |
2717 | ||
2718 | Note that there is a confusing case here. If the real definition | |
2719 | is defined by a regular object file, we don't get the real symbol | |
2720 | from the dynamic object, but we do get the weak symbol. If the | |
2721 | processor backend uses a COPY reloc, then if some routine in the | |
2722 | dynamic object changes the real symbol, we will not see that | |
2723 | change in the corresponding weak symbol. This is the way other | |
2724 | ELF linkers work as well, and seems to be a result of the shared | |
2725 | library model. | |
2726 | ||
2727 | I will clarify this issue. Most SVR4 shared libraries define the | |
2728 | variable _timezone and define timezone as a weak synonym. The | |
2729 | tzset call changes _timezone. If you write | |
2730 | extern int timezone; | |
2731 | int _timezone = 5; | |
2732 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2733 | you might expect that, since timezone is a synonym for _timezone, | |
2734 | the same number will print both times. However, if the processor | |
2735 | backend uses a COPY reloc, then actually timezone will be copied | |
2736 | into your process image, and, since you define _timezone | |
2737 | yourself, _timezone will not. Thus timezone and _timezone will | |
2738 | wind up at different memory locations. The tzset call will set | |
2739 | _timezone, leaving timezone unchanged. */ | |
2740 | ||
f6e332e6 | 2741 | if (h->u.weakdef != NULL) |
45d6a902 | 2742 | { |
ec24dc88 AM |
2743 | /* If we get to this point, there is an implicit reference to |
2744 | H->U.WEAKDEF by a regular object file via the weak symbol H. */ | |
f6e332e6 | 2745 | h->u.weakdef->ref_regular = 1; |
45d6a902 | 2746 | |
ec24dc88 AM |
2747 | /* Ensure that the backend adjust_dynamic_symbol function sees |
2748 | H->U.WEAKDEF before H by recursively calling ourselves. */ | |
f6e332e6 | 2749 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2750 | return FALSE; |
2751 | } | |
2752 | ||
2753 | /* If a symbol has no type and no size and does not require a PLT | |
2754 | entry, then we are probably about to do the wrong thing here: we | |
2755 | are probably going to create a COPY reloc for an empty object. | |
2756 | This case can arise when a shared object is built with assembly | |
2757 | code, and the assembly code fails to set the symbol type. */ | |
2758 | if (h->size == 0 | |
2759 | && h->type == STT_NOTYPE | |
f5385ebf | 2760 | && !h->needs_plt) |
45d6a902 AM |
2761 | (*_bfd_error_handler) |
2762 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
2763 | h->root.root.string); | |
2764 | ||
2765 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2766 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2767 | |
45d6a902 AM |
2768 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2769 | { | |
2770 | eif->failed = TRUE; | |
2771 | return FALSE; | |
2772 | } | |
2773 | ||
2774 | return TRUE; | |
2775 | } | |
2776 | ||
027297b7 L |
2777 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2778 | DYNBSS. */ | |
2779 | ||
2780 | bfd_boolean | |
6cabe1ea AM |
2781 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
2782 | struct elf_link_hash_entry *h, | |
027297b7 L |
2783 | asection *dynbss) |
2784 | { | |
91ac5911 | 2785 | unsigned int power_of_two; |
027297b7 L |
2786 | bfd_vma mask; |
2787 | asection *sec = h->root.u.def.section; | |
2788 | ||
2789 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2790 | requirement of symbols defined in the section. Since we don't |
2791 | know the symbol alignment requirement, we start with the | |
2792 | maximum alignment and check low bits of the symbol address | |
2793 | for the minimum alignment. */ | |
2794 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2795 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2796 | while ((h->root.u.def.value & mask) != 0) | |
2797 | { | |
2798 | mask >>= 1; | |
2799 | --power_of_two; | |
2800 | } | |
027297b7 | 2801 | |
91ac5911 L |
2802 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2803 | dynbss)) | |
027297b7 L |
2804 | { |
2805 | /* Adjust the section alignment if needed. */ | |
2806 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2807 | power_of_two)) |
027297b7 L |
2808 | return FALSE; |
2809 | } | |
2810 | ||
91ac5911 | 2811 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2812 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2813 | ||
2814 | /* Define the symbol as being at this point in DYNBSS. */ | |
2815 | h->root.u.def.section = dynbss; | |
2816 | h->root.u.def.value = dynbss->size; | |
2817 | ||
2818 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2819 | dynbss->size += h->size; | |
2820 | ||
f7483970 L |
2821 | /* No error if extern_protected_data is true. */ |
2822 | if (h->protected_def | |
889c2a67 L |
2823 | && (!info->extern_protected_data |
2824 | || (info->extern_protected_data < 0 | |
2825 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 AM |
2826 | info->callbacks->einfo |
2827 | (_("%P: copy reloc against protected `%T' is dangerous\n"), | |
2828 | h->root.root.string); | |
6cabe1ea | 2829 | |
027297b7 L |
2830 | return TRUE; |
2831 | } | |
2832 | ||
45d6a902 AM |
2833 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2834 | to reflect the object merging within the sections. */ | |
2835 | ||
28caa186 | 2836 | static bfd_boolean |
268b6b39 | 2837 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2838 | { |
2839 | asection *sec; | |
2840 | ||
45d6a902 AM |
2841 | if ((h->root.type == bfd_link_hash_defined |
2842 | || h->root.type == bfd_link_hash_defweak) | |
2843 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 2844 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 2845 | { |
a50b1753 | 2846 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2847 | |
2848 | h->root.u.def.value = | |
2849 | _bfd_merged_section_offset (output_bfd, | |
2850 | &h->root.u.def.section, | |
2851 | elf_section_data (sec)->sec_info, | |
753731ee | 2852 | h->root.u.def.value); |
45d6a902 AM |
2853 | } |
2854 | ||
2855 | return TRUE; | |
2856 | } | |
986a241f RH |
2857 | |
2858 | /* Returns false if the symbol referred to by H should be considered | |
2859 | to resolve local to the current module, and true if it should be | |
2860 | considered to bind dynamically. */ | |
2861 | ||
2862 | bfd_boolean | |
268b6b39 AM |
2863 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2864 | struct bfd_link_info *info, | |
89a2ee5a | 2865 | bfd_boolean not_local_protected) |
986a241f RH |
2866 | { |
2867 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2868 | const struct elf_backend_data *bed; |
2869 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2870 | |
2871 | if (h == NULL) | |
2872 | return FALSE; | |
2873 | ||
2874 | while (h->root.type == bfd_link_hash_indirect | |
2875 | || h->root.type == bfd_link_hash_warning) | |
2876 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2877 | ||
2878 | /* If it was forced local, then clearly it's not dynamic. */ | |
2879 | if (h->dynindx == -1) | |
2880 | return FALSE; | |
f5385ebf | 2881 | if (h->forced_local) |
986a241f RH |
2882 | return FALSE; |
2883 | ||
2884 | /* Identify the cases where name binding rules say that a | |
2885 | visible symbol resolves locally. */ | |
0e1862bb L |
2886 | binding_stays_local_p = (bfd_link_executable (info) |
2887 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
2888 | |
2889 | switch (ELF_ST_VISIBILITY (h->other)) | |
2890 | { | |
2891 | case STV_INTERNAL: | |
2892 | case STV_HIDDEN: | |
2893 | return FALSE; | |
2894 | ||
2895 | case STV_PROTECTED: | |
fcb93ecf PB |
2896 | hash_table = elf_hash_table (info); |
2897 | if (!is_elf_hash_table (hash_table)) | |
2898 | return FALSE; | |
2899 | ||
2900 | bed = get_elf_backend_data (hash_table->dynobj); | |
2901 | ||
986a241f RH |
2902 | /* Proper resolution for function pointer equality may require |
2903 | that these symbols perhaps be resolved dynamically, even though | |
2904 | we should be resolving them to the current module. */ | |
89a2ee5a | 2905 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
2906 | binding_stays_local_p = TRUE; |
2907 | break; | |
2908 | ||
2909 | default: | |
986a241f RH |
2910 | break; |
2911 | } | |
2912 | ||
aa37626c | 2913 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 2914 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
2915 | return TRUE; |
2916 | ||
986a241f RH |
2917 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
2918 | us that it remains local. */ | |
2919 | return !binding_stays_local_p; | |
2920 | } | |
f6c52c13 AM |
2921 | |
2922 | /* Return true if the symbol referred to by H should be considered | |
2923 | to resolve local to the current module, and false otherwise. Differs | |
2924 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 2925 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
2926 | for the place where forced_local and dynindx == -1 are tested. If |
2927 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
2928 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
2929 | the symbol is local only for defined symbols. | |
2930 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
2931 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
2932 | treatment of undefined weak symbols. For those that do not make | |
2933 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
2934 | |
2935 | bfd_boolean | |
268b6b39 AM |
2936 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
2937 | struct bfd_link_info *info, | |
2938 | bfd_boolean local_protected) | |
f6c52c13 | 2939 | { |
fcb93ecf PB |
2940 | const struct elf_backend_data *bed; |
2941 | struct elf_link_hash_table *hash_table; | |
2942 | ||
f6c52c13 AM |
2943 | /* If it's a local sym, of course we resolve locally. */ |
2944 | if (h == NULL) | |
2945 | return TRUE; | |
2946 | ||
d95edcac L |
2947 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
2948 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
2949 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
2950 | return TRUE; | |
2951 | ||
7e2294f9 AO |
2952 | /* Common symbols that become definitions don't get the DEF_REGULAR |
2953 | flag set, so test it first, and don't bail out. */ | |
2954 | if (ELF_COMMON_DEF_P (h)) | |
2955 | /* Do nothing. */; | |
f6c52c13 | 2956 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
2957 | resolve locally. The sym is either undefined or dynamic. */ |
2958 | else if (!h->def_regular) | |
f6c52c13 AM |
2959 | return FALSE; |
2960 | ||
2961 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 2962 | if (h->forced_local) |
f6c52c13 AM |
2963 | return TRUE; |
2964 | ||
2965 | /* As do non-dynamic symbols. */ | |
2966 | if (h->dynindx == -1) | |
2967 | return TRUE; | |
2968 | ||
2969 | /* At this point, we know the symbol is defined and dynamic. In an | |
2970 | executable it must resolve locally, likewise when building symbolic | |
2971 | shared libraries. */ | |
0e1862bb | 2972 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
2973 | return TRUE; |
2974 | ||
2975 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
2976 | with default visibility might not resolve locally. */ | |
2977 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2978 | return FALSE; | |
2979 | ||
fcb93ecf PB |
2980 | hash_table = elf_hash_table (info); |
2981 | if (!is_elf_hash_table (hash_table)) | |
2982 | return TRUE; | |
2983 | ||
2984 | bed = get_elf_backend_data (hash_table->dynobj); | |
2985 | ||
f7483970 L |
2986 | /* If extern_protected_data is false, STV_PROTECTED non-function |
2987 | symbols are local. */ | |
889c2a67 L |
2988 | if ((!info->extern_protected_data |
2989 | || (info->extern_protected_data < 0 | |
2990 | && !bed->extern_protected_data)) | |
2991 | && !bed->is_function_type (h->type)) | |
1c16dfa5 L |
2992 | return TRUE; |
2993 | ||
f6c52c13 | 2994 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
2995 | symbols be treated as dynamic symbols. If the address of a |
2996 | function not defined in an executable is set to that function's | |
2997 | plt entry in the executable, then the address of the function in | |
2998 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
2999 | return local_protected; |
3000 | } | |
e1918d23 AM |
3001 | |
3002 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
3003 | aligned. Returns the first TLS output section. */ | |
3004 | ||
3005 | struct bfd_section * | |
3006 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
3007 | { | |
3008 | struct bfd_section *sec, *tls; | |
3009 | unsigned int align = 0; | |
3010 | ||
3011 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
3012 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
3013 | break; | |
3014 | tls = sec; | |
3015 | ||
3016 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
3017 | if (sec->alignment_power > align) | |
3018 | align = sec->alignment_power; | |
3019 | ||
3020 | elf_hash_table (info)->tls_sec = tls; | |
3021 | ||
3022 | /* Ensure the alignment of the first section is the largest alignment, | |
3023 | so that the tls segment starts aligned. */ | |
3024 | if (tls != NULL) | |
3025 | tls->alignment_power = align; | |
3026 | ||
3027 | return tls; | |
3028 | } | |
0ad989f9 L |
3029 | |
3030 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
3031 | static bfd_boolean | |
3032 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
3033 | Elf_Internal_Sym *sym) | |
3034 | { | |
a4d8e49b L |
3035 | const struct elf_backend_data *bed; |
3036 | ||
0ad989f9 L |
3037 | /* Local symbols do not count, but target specific ones might. */ |
3038 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3039 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
3040 | return FALSE; | |
3041 | ||
fcb93ecf | 3042 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3043 | /* Function symbols do not count. */ |
fcb93ecf | 3044 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
3045 | return FALSE; |
3046 | ||
3047 | /* If the section is undefined, then so is the symbol. */ | |
3048 | if (sym->st_shndx == SHN_UNDEF) | |
3049 | return FALSE; | |
3050 | ||
3051 | /* If the symbol is defined in the common section, then | |
3052 | it is a common definition and so does not count. */ | |
a4d8e49b | 3053 | if (bed->common_definition (sym)) |
0ad989f9 L |
3054 | return FALSE; |
3055 | ||
3056 | /* If the symbol is in a target specific section then we | |
3057 | must rely upon the backend to tell us what it is. */ | |
3058 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3059 | /* FIXME - this function is not coded yet: | |
3060 | ||
3061 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3062 | ||
3063 | Instead for now assume that the definition is not global, | |
3064 | Even if this is wrong, at least the linker will behave | |
3065 | in the same way that it used to do. */ | |
3066 | return FALSE; | |
3067 | ||
3068 | return TRUE; | |
3069 | } | |
3070 | ||
3071 | /* Search the symbol table of the archive element of the archive ABFD | |
3072 | whose archive map contains a mention of SYMDEF, and determine if | |
3073 | the symbol is defined in this element. */ | |
3074 | static bfd_boolean | |
3075 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
3076 | { | |
3077 | Elf_Internal_Shdr * hdr; | |
3078 | bfd_size_type symcount; | |
3079 | bfd_size_type extsymcount; | |
3080 | bfd_size_type extsymoff; | |
3081 | Elf_Internal_Sym *isymbuf; | |
3082 | Elf_Internal_Sym *isym; | |
3083 | Elf_Internal_Sym *isymend; | |
3084 | bfd_boolean result; | |
3085 | ||
3086 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3087 | if (abfd == NULL) | |
3088 | return FALSE; | |
3089 | ||
f0bf6bfd L |
3090 | /* Return FALSE if the object has been claimed by plugin. */ |
3091 | if (abfd->plugin_format == bfd_plugin_yes) | |
3092 | return FALSE; | |
3093 | ||
0ad989f9 L |
3094 | if (! bfd_check_format (abfd, bfd_object)) |
3095 | return FALSE; | |
3096 | ||
0ad989f9 L |
3097 | /* Select the appropriate symbol table. */ |
3098 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
3099 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3100 | else | |
3101 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3102 | ||
3103 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3104 | ||
3105 | /* The sh_info field of the symtab header tells us where the | |
3106 | external symbols start. We don't care about the local symbols. */ | |
3107 | if (elf_bad_symtab (abfd)) | |
3108 | { | |
3109 | extsymcount = symcount; | |
3110 | extsymoff = 0; | |
3111 | } | |
3112 | else | |
3113 | { | |
3114 | extsymcount = symcount - hdr->sh_info; | |
3115 | extsymoff = hdr->sh_info; | |
3116 | } | |
3117 | ||
3118 | if (extsymcount == 0) | |
3119 | return FALSE; | |
3120 | ||
3121 | /* Read in the symbol table. */ | |
3122 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3123 | NULL, NULL, NULL); | |
3124 | if (isymbuf == NULL) | |
3125 | return FALSE; | |
3126 | ||
3127 | /* Scan the symbol table looking for SYMDEF. */ | |
3128 | result = FALSE; | |
3129 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3130 | { | |
3131 | const char *name; | |
3132 | ||
3133 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3134 | isym->st_name); | |
3135 | if (name == NULL) | |
3136 | break; | |
3137 | ||
3138 | if (strcmp (name, symdef->name) == 0) | |
3139 | { | |
3140 | result = is_global_data_symbol_definition (abfd, isym); | |
3141 | break; | |
3142 | } | |
3143 | } | |
3144 | ||
3145 | free (isymbuf); | |
3146 | ||
3147 | return result; | |
3148 | } | |
3149 | \f | |
5a580b3a AM |
3150 | /* Add an entry to the .dynamic table. */ |
3151 | ||
3152 | bfd_boolean | |
3153 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3154 | bfd_vma tag, | |
3155 | bfd_vma val) | |
3156 | { | |
3157 | struct elf_link_hash_table *hash_table; | |
3158 | const struct elf_backend_data *bed; | |
3159 | asection *s; | |
3160 | bfd_size_type newsize; | |
3161 | bfd_byte *newcontents; | |
3162 | Elf_Internal_Dyn dyn; | |
3163 | ||
3164 | hash_table = elf_hash_table (info); | |
3165 | if (! is_elf_hash_table (hash_table)) | |
3166 | return FALSE; | |
3167 | ||
3168 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3169 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3170 | BFD_ASSERT (s != NULL); |
3171 | ||
eea6121a | 3172 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3173 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3174 | if (newcontents == NULL) |
3175 | return FALSE; | |
3176 | ||
3177 | dyn.d_tag = tag; | |
3178 | dyn.d_un.d_val = val; | |
eea6121a | 3179 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3180 | |
eea6121a | 3181 | s->size = newsize; |
5a580b3a AM |
3182 | s->contents = newcontents; |
3183 | ||
3184 | return TRUE; | |
3185 | } | |
3186 | ||
3187 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3188 | otherwise just check whether one already exists. Returns -1 on error, | |
3189 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3190 | ||
4ad4eba5 | 3191 | static int |
7e9f0867 AM |
3192 | elf_add_dt_needed_tag (bfd *abfd, |
3193 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3194 | const char *soname, |
3195 | bfd_boolean do_it) | |
5a580b3a AM |
3196 | { |
3197 | struct elf_link_hash_table *hash_table; | |
5a580b3a AM |
3198 | bfd_size_type strindex; |
3199 | ||
7e9f0867 AM |
3200 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3201 | return -1; | |
3202 | ||
5a580b3a | 3203 | hash_table = elf_hash_table (info); |
5a580b3a AM |
3204 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
3205 | if (strindex == (bfd_size_type) -1) | |
3206 | return -1; | |
3207 | ||
02be4619 | 3208 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3209 | { |
3210 | asection *sdyn; | |
3211 | const struct elf_backend_data *bed; | |
3212 | bfd_byte *extdyn; | |
3213 | ||
3214 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3215 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3216 | if (sdyn != NULL) |
3217 | for (extdyn = sdyn->contents; | |
3218 | extdyn < sdyn->contents + sdyn->size; | |
3219 | extdyn += bed->s->sizeof_dyn) | |
3220 | { | |
3221 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3222 | |
7e9f0867 AM |
3223 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3224 | if (dyn.d_tag == DT_NEEDED | |
3225 | && dyn.d_un.d_val == strindex) | |
3226 | { | |
3227 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3228 | return 1; | |
3229 | } | |
3230 | } | |
5a580b3a AM |
3231 | } |
3232 | ||
3233 | if (do_it) | |
3234 | { | |
7e9f0867 AM |
3235 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3236 | return -1; | |
3237 | ||
5a580b3a AM |
3238 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3239 | return -1; | |
3240 | } | |
3241 | else | |
3242 | /* We were just checking for existence of the tag. */ | |
3243 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3244 | ||
3245 | return 0; | |
3246 | } | |
3247 | ||
010e5ae2 AM |
3248 | static bfd_boolean |
3249 | on_needed_list (const char *soname, struct bfd_link_needed_list *needed) | |
3250 | { | |
3251 | for (; needed != NULL; needed = needed->next) | |
1240be6b AM |
3252 | if ((elf_dyn_lib_class (needed->by) & DYN_AS_NEEDED) == 0 |
3253 | && strcmp (soname, needed->name) == 0) | |
010e5ae2 AM |
3254 | return TRUE; |
3255 | ||
3256 | return FALSE; | |
3257 | } | |
3258 | ||
14160578 | 3259 | /* Sort symbol by value, section, and size. */ |
4ad4eba5 AM |
3260 | static int |
3261 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3262 | { |
3263 | const struct elf_link_hash_entry *h1; | |
3264 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3265 | bfd_signed_vma vdiff; |
5a580b3a AM |
3266 | |
3267 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3268 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3269 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3270 | if (vdiff != 0) | |
3271 | return vdiff > 0 ? 1 : -1; | |
3272 | else | |
3273 | { | |
d3435ae8 | 3274 | int sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; |
10b7e05b NC |
3275 | if (sdiff != 0) |
3276 | return sdiff > 0 ? 1 : -1; | |
3277 | } | |
14160578 AM |
3278 | vdiff = h1->size - h2->size; |
3279 | return vdiff == 0 ? 0 : vdiff > 0 ? 1 : -1; | |
5a580b3a | 3280 | } |
4ad4eba5 | 3281 | |
5a580b3a AM |
3282 | /* This function is used to adjust offsets into .dynstr for |
3283 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3284 | ||
3285 | static bfd_boolean | |
3286 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3287 | { | |
a50b1753 | 3288 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3289 | |
5a580b3a AM |
3290 | if (h->dynindx != -1) |
3291 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3292 | return TRUE; | |
3293 | } | |
3294 | ||
3295 | /* Assign string offsets in .dynstr, update all structures referencing | |
3296 | them. */ | |
3297 | ||
4ad4eba5 AM |
3298 | static bfd_boolean |
3299 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3300 | { |
3301 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3302 | struct elf_link_local_dynamic_entry *entry; | |
3303 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3304 | bfd *dynobj = hash_table->dynobj; | |
3305 | asection *sdyn; | |
3306 | bfd_size_type size; | |
3307 | const struct elf_backend_data *bed; | |
3308 | bfd_byte *extdyn; | |
3309 | ||
3310 | _bfd_elf_strtab_finalize (dynstr); | |
3311 | size = _bfd_elf_strtab_size (dynstr); | |
3312 | ||
3313 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3314 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3315 | BFD_ASSERT (sdyn != NULL); |
3316 | ||
3317 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3318 | for (extdyn = sdyn->contents; | |
eea6121a | 3319 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3320 | extdyn += bed->s->sizeof_dyn) |
3321 | { | |
3322 | Elf_Internal_Dyn dyn; | |
3323 | ||
3324 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3325 | switch (dyn.d_tag) | |
3326 | { | |
3327 | case DT_STRSZ: | |
3328 | dyn.d_un.d_val = size; | |
3329 | break; | |
3330 | case DT_NEEDED: | |
3331 | case DT_SONAME: | |
3332 | case DT_RPATH: | |
3333 | case DT_RUNPATH: | |
3334 | case DT_FILTER: | |
3335 | case DT_AUXILIARY: | |
7ee314fa AM |
3336 | case DT_AUDIT: |
3337 | case DT_DEPAUDIT: | |
5a580b3a AM |
3338 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3339 | break; | |
3340 | default: | |
3341 | continue; | |
3342 | } | |
3343 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3344 | } | |
3345 | ||
3346 | /* Now update local dynamic symbols. */ | |
3347 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3348 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3349 | entry->isym.st_name); | |
3350 | ||
3351 | /* And the rest of dynamic symbols. */ | |
3352 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3353 | ||
3354 | /* Adjust version definitions. */ | |
3355 | if (elf_tdata (output_bfd)->cverdefs) | |
3356 | { | |
3357 | asection *s; | |
3358 | bfd_byte *p; | |
3359 | bfd_size_type i; | |
3360 | Elf_Internal_Verdef def; | |
3361 | Elf_Internal_Verdaux defaux; | |
3362 | ||
3d4d4302 | 3363 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3364 | p = s->contents; |
3365 | do | |
3366 | { | |
3367 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3368 | &def); | |
3369 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3370 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3371 | continue; | |
5a580b3a AM |
3372 | for (i = 0; i < def.vd_cnt; ++i) |
3373 | { | |
3374 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3375 | (Elf_External_Verdaux *) p, &defaux); | |
3376 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3377 | defaux.vda_name); | |
3378 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3379 | &defaux, (Elf_External_Verdaux *) p); | |
3380 | p += sizeof (Elf_External_Verdaux); | |
3381 | } | |
3382 | } | |
3383 | while (def.vd_next); | |
3384 | } | |
3385 | ||
3386 | /* Adjust version references. */ | |
3387 | if (elf_tdata (output_bfd)->verref) | |
3388 | { | |
3389 | asection *s; | |
3390 | bfd_byte *p; | |
3391 | bfd_size_type i; | |
3392 | Elf_Internal_Verneed need; | |
3393 | Elf_Internal_Vernaux needaux; | |
3394 | ||
3d4d4302 | 3395 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3396 | p = s->contents; |
3397 | do | |
3398 | { | |
3399 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3400 | &need); | |
3401 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3402 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3403 | (Elf_External_Verneed *) p); | |
3404 | p += sizeof (Elf_External_Verneed); | |
3405 | for (i = 0; i < need.vn_cnt; ++i) | |
3406 | { | |
3407 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3408 | (Elf_External_Vernaux *) p, &needaux); | |
3409 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3410 | needaux.vna_name); | |
3411 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3412 | &needaux, | |
3413 | (Elf_External_Vernaux *) p); | |
3414 | p += sizeof (Elf_External_Vernaux); | |
3415 | } | |
3416 | } | |
3417 | while (need.vn_next); | |
3418 | } | |
3419 | ||
3420 | return TRUE; | |
3421 | } | |
3422 | \f | |
13285a1b AM |
3423 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3424 | The default is to only match when the INPUT and OUTPUT are exactly | |
3425 | the same target. */ | |
3426 | ||
3427 | bfd_boolean | |
3428 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3429 | const bfd_target *output) | |
3430 | { | |
3431 | return input == output; | |
3432 | } | |
3433 | ||
3434 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3435 | This version is used when different targets for the same architecture | |
3436 | are virtually identical. */ | |
3437 | ||
3438 | bfd_boolean | |
3439 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3440 | const bfd_target *output) | |
3441 | { | |
3442 | const struct elf_backend_data *obed, *ibed; | |
3443 | ||
3444 | if (input == output) | |
3445 | return TRUE; | |
3446 | ||
3447 | ibed = xvec_get_elf_backend_data (input); | |
3448 | obed = xvec_get_elf_backend_data (output); | |
3449 | ||
3450 | if (ibed->arch != obed->arch) | |
3451 | return FALSE; | |
3452 | ||
3453 | /* If both backends are using this function, deem them compatible. */ | |
3454 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3455 | } | |
3456 | ||
e5034e59 AM |
3457 | /* Make a special call to the linker "notice" function to tell it that |
3458 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3459 | processing the lib. */ |
e5034e59 AM |
3460 | |
3461 | bfd_boolean | |
3462 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3463 | struct bfd_link_info *info, | |
3464 | enum notice_asneeded_action act) | |
3465 | { | |
46135103 | 3466 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3467 | } |
3468 | ||
4ad4eba5 AM |
3469 | /* Add symbols from an ELF object file to the linker hash table. */ |
3470 | ||
3471 | static bfd_boolean | |
3472 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3473 | { | |
a0c402a5 | 3474 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 AM |
3475 | Elf_Internal_Shdr *hdr; |
3476 | bfd_size_type symcount; | |
3477 | bfd_size_type extsymcount; | |
3478 | bfd_size_type extsymoff; | |
3479 | struct elf_link_hash_entry **sym_hash; | |
3480 | bfd_boolean dynamic; | |
3481 | Elf_External_Versym *extversym = NULL; | |
3482 | Elf_External_Versym *ever; | |
3483 | struct elf_link_hash_entry *weaks; | |
3484 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
3485 | bfd_size_type nondeflt_vers_cnt = 0; | |
3486 | Elf_Internal_Sym *isymbuf = NULL; | |
3487 | Elf_Internal_Sym *isym; | |
3488 | Elf_Internal_Sym *isymend; | |
3489 | const struct elf_backend_data *bed; | |
3490 | bfd_boolean add_needed; | |
66eb6687 | 3491 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3492 | bfd_size_type amt; |
66eb6687 | 3493 | void *alloc_mark = NULL; |
4f87808c AM |
3494 | struct bfd_hash_entry **old_table = NULL; |
3495 | unsigned int old_size = 0; | |
3496 | unsigned int old_count = 0; | |
66eb6687 | 3497 | void *old_tab = NULL; |
66eb6687 AM |
3498 | void *old_ent; |
3499 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3500 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
3501 | long old_dynsymcount = 0; | |
a4542f1b | 3502 | bfd_size_type old_dynstr_size = 0; |
66eb6687 | 3503 | size_t tabsize = 0; |
db6a5d5f | 3504 | asection *s; |
29a9f53e | 3505 | bfd_boolean just_syms; |
4ad4eba5 | 3506 | |
66eb6687 | 3507 | htab = elf_hash_table (info); |
4ad4eba5 | 3508 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3509 | |
3510 | if ((abfd->flags & DYNAMIC) == 0) | |
3511 | dynamic = FALSE; | |
3512 | else | |
3513 | { | |
3514 | dynamic = TRUE; | |
3515 | ||
3516 | /* You can't use -r against a dynamic object. Also, there's no | |
3517 | hope of using a dynamic object which does not exactly match | |
3518 | the format of the output file. */ | |
0e1862bb | 3519 | if (bfd_link_relocatable (info) |
66eb6687 | 3520 | || !is_elf_hash_table (htab) |
f13a99db | 3521 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3522 | { |
0e1862bb | 3523 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
3524 | bfd_set_error (bfd_error_invalid_operation); |
3525 | else | |
3526 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3527 | goto error_return; |
3528 | } | |
3529 | } | |
3530 | ||
a0c402a5 L |
3531 | ehdr = elf_elfheader (abfd); |
3532 | if (info->warn_alternate_em | |
3533 | && bed->elf_machine_code != ehdr->e_machine | |
3534 | && ((bed->elf_machine_alt1 != 0 | |
3535 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3536 | || (bed->elf_machine_alt2 != 0 | |
3537 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3538 | info->callbacks->einfo | |
3539 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), | |
3540 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3541 | ||
4ad4eba5 AM |
3542 | /* As a GNU extension, any input sections which are named |
3543 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3544 | symbol. This differs from .gnu.warning sections, which generate | |
3545 | warnings when they are included in an output file. */ | |
dd98f8d2 | 3546 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 3547 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 3548 | { |
db6a5d5f | 3549 | const char *name; |
4ad4eba5 | 3550 | |
db6a5d5f AM |
3551 | name = bfd_get_section_name (abfd, s); |
3552 | if (CONST_STRNEQ (name, ".gnu.warning.")) | |
4ad4eba5 | 3553 | { |
db6a5d5f AM |
3554 | char *msg; |
3555 | bfd_size_type sz; | |
3556 | ||
3557 | name += sizeof ".gnu.warning." - 1; | |
3558 | ||
3559 | /* If this is a shared object, then look up the symbol | |
3560 | in the hash table. If it is there, and it is already | |
3561 | been defined, then we will not be using the entry | |
3562 | from this shared object, so we don't need to warn. | |
3563 | FIXME: If we see the definition in a regular object | |
3564 | later on, we will warn, but we shouldn't. The only | |
3565 | fix is to keep track of what warnings we are supposed | |
3566 | to emit, and then handle them all at the end of the | |
3567 | link. */ | |
3568 | if (dynamic) | |
4ad4eba5 | 3569 | { |
db6a5d5f AM |
3570 | struct elf_link_hash_entry *h; |
3571 | ||
3572 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
3573 | ||
3574 | /* FIXME: What about bfd_link_hash_common? */ | |
3575 | if (h != NULL | |
3576 | && (h->root.type == bfd_link_hash_defined | |
3577 | || h->root.type == bfd_link_hash_defweak)) | |
3578 | continue; | |
3579 | } | |
4ad4eba5 | 3580 | |
db6a5d5f AM |
3581 | sz = s->size; |
3582 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
3583 | if (msg == NULL) | |
3584 | goto error_return; | |
4ad4eba5 | 3585 | |
db6a5d5f AM |
3586 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
3587 | goto error_return; | |
4ad4eba5 | 3588 | |
db6a5d5f | 3589 | msg[sz] = '\0'; |
4ad4eba5 | 3590 | |
db6a5d5f AM |
3591 | if (! (_bfd_generic_link_add_one_symbol |
3592 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
3593 | FALSE, bed->collect, NULL))) | |
3594 | goto error_return; | |
4ad4eba5 | 3595 | |
0e1862bb | 3596 | if (bfd_link_executable (info)) |
db6a5d5f AM |
3597 | { |
3598 | /* Clobber the section size so that the warning does | |
3599 | not get copied into the output file. */ | |
3600 | s->size = 0; | |
11d2f718 | 3601 | |
db6a5d5f AM |
3602 | /* Also set SEC_EXCLUDE, so that symbols defined in |
3603 | the warning section don't get copied to the output. */ | |
3604 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3605 | } |
3606 | } | |
3607 | } | |
3608 | ||
29a9f53e L |
3609 | just_syms = ((s = abfd->sections) != NULL |
3610 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
3611 | ||
4ad4eba5 AM |
3612 | add_needed = TRUE; |
3613 | if (! dynamic) | |
3614 | { | |
3615 | /* If we are creating a shared library, create all the dynamic | |
3616 | sections immediately. We need to attach them to something, | |
3617 | so we attach them to this BFD, provided it is the right | |
bf89386a L |
3618 | format and is not from ld --just-symbols. Always create the |
3619 | dynamic sections for -E/--dynamic-list. FIXME: If there | |
29a9f53e L |
3620 | are no input BFD's of the same format as the output, we can't |
3621 | make a shared library. */ | |
3622 | if (!just_syms | |
bf89386a L |
3623 | && (bfd_link_pic (info) |
3624 | || info->export_dynamic | |
3625 | || info->dynamic) | |
66eb6687 | 3626 | && is_elf_hash_table (htab) |
f13a99db | 3627 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3628 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3629 | { |
3630 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3631 | goto error_return; | |
3632 | } | |
3633 | } | |
66eb6687 | 3634 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3635 | goto error_return; |
3636 | else | |
3637 | { | |
4ad4eba5 | 3638 | const char *soname = NULL; |
7ee314fa | 3639 | char *audit = NULL; |
4ad4eba5 AM |
3640 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
3641 | int ret; | |
3642 | ||
3643 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3644 | ld shouldn't allow it. */ |
29a9f53e | 3645 | if (just_syms) |
92fd189d | 3646 | abort (); |
4ad4eba5 AM |
3647 | |
3648 | /* If this dynamic lib was specified on the command line with | |
3649 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3650 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3651 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3652 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3653 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3654 | all. */ | |
3655 | add_needed = (elf_dyn_lib_class (abfd) | |
3656 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3657 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3658 | |
3659 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3660 | if (s != NULL) | |
3661 | { | |
3662 | bfd_byte *dynbuf; | |
3663 | bfd_byte *extdyn; | |
cb33740c | 3664 | unsigned int elfsec; |
4ad4eba5 AM |
3665 | unsigned long shlink; |
3666 | ||
eea6121a | 3667 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3668 | { |
3669 | error_free_dyn: | |
3670 | free (dynbuf); | |
3671 | goto error_return; | |
3672 | } | |
4ad4eba5 AM |
3673 | |
3674 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3675 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3676 | goto error_free_dyn; |
3677 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3678 | ||
3679 | for (extdyn = dynbuf; | |
eea6121a | 3680 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3681 | extdyn += bed->s->sizeof_dyn) |
3682 | { | |
3683 | Elf_Internal_Dyn dyn; | |
3684 | ||
3685 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3686 | if (dyn.d_tag == DT_SONAME) | |
3687 | { | |
3688 | unsigned int tagv = dyn.d_un.d_val; | |
3689 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3690 | if (soname == NULL) | |
3691 | goto error_free_dyn; | |
3692 | } | |
3693 | if (dyn.d_tag == DT_NEEDED) | |
3694 | { | |
3695 | struct bfd_link_needed_list *n, **pn; | |
3696 | char *fnm, *anm; | |
3697 | unsigned int tagv = dyn.d_un.d_val; | |
3698 | ||
3699 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3700 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3701 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3702 | if (n == NULL || fnm == NULL) | |
3703 | goto error_free_dyn; | |
3704 | amt = strlen (fnm) + 1; | |
a50b1753 | 3705 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3706 | if (anm == NULL) |
3707 | goto error_free_dyn; | |
3708 | memcpy (anm, fnm, amt); | |
3709 | n->name = anm; | |
3710 | n->by = abfd; | |
3711 | n->next = NULL; | |
66eb6687 | 3712 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3713 | ; |
3714 | *pn = n; | |
3715 | } | |
3716 | if (dyn.d_tag == DT_RUNPATH) | |
3717 | { | |
3718 | struct bfd_link_needed_list *n, **pn; | |
3719 | char *fnm, *anm; | |
3720 | unsigned int tagv = dyn.d_un.d_val; | |
3721 | ||
3722 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3723 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3724 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3725 | if (n == NULL || fnm == NULL) | |
3726 | goto error_free_dyn; | |
3727 | amt = strlen (fnm) + 1; | |
a50b1753 | 3728 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3729 | if (anm == NULL) |
3730 | goto error_free_dyn; | |
3731 | memcpy (anm, fnm, amt); | |
3732 | n->name = anm; | |
3733 | n->by = abfd; | |
3734 | n->next = NULL; | |
3735 | for (pn = & runpath; | |
3736 | *pn != NULL; | |
3737 | pn = &(*pn)->next) | |
3738 | ; | |
3739 | *pn = n; | |
3740 | } | |
3741 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3742 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3743 | { | |
3744 | struct bfd_link_needed_list *n, **pn; | |
3745 | char *fnm, *anm; | |
3746 | unsigned int tagv = dyn.d_un.d_val; | |
3747 | ||
3748 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3749 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3750 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3751 | if (n == NULL || fnm == NULL) | |
3752 | goto error_free_dyn; | |
3753 | amt = strlen (fnm) + 1; | |
a50b1753 | 3754 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3755 | if (anm == NULL) |
f8703194 | 3756 | goto error_free_dyn; |
4ad4eba5 AM |
3757 | memcpy (anm, fnm, amt); |
3758 | n->name = anm; | |
3759 | n->by = abfd; | |
3760 | n->next = NULL; | |
3761 | for (pn = & rpath; | |
3762 | *pn != NULL; | |
3763 | pn = &(*pn)->next) | |
3764 | ; | |
3765 | *pn = n; | |
3766 | } | |
7ee314fa AM |
3767 | if (dyn.d_tag == DT_AUDIT) |
3768 | { | |
3769 | unsigned int tagv = dyn.d_un.d_val; | |
3770 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3771 | } | |
4ad4eba5 AM |
3772 | } |
3773 | ||
3774 | free (dynbuf); | |
3775 | } | |
3776 | ||
3777 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3778 | frees all more recently bfd_alloc'd blocks as well. */ | |
3779 | if (runpath) | |
3780 | rpath = runpath; | |
3781 | ||
3782 | if (rpath) | |
3783 | { | |
3784 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3785 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3786 | ; |
3787 | *pn = rpath; | |
3788 | } | |
3789 | ||
3790 | /* We do not want to include any of the sections in a dynamic | |
3791 | object in the output file. We hack by simply clobbering the | |
3792 | list of sections in the BFD. This could be handled more | |
3793 | cleanly by, say, a new section flag; the existing | |
3794 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3795 | still implies that the section takes up space in the output | |
3796 | file. */ | |
3797 | bfd_section_list_clear (abfd); | |
3798 | ||
4ad4eba5 AM |
3799 | /* Find the name to use in a DT_NEEDED entry that refers to this |
3800 | object. If the object has a DT_SONAME entry, we use it. | |
3801 | Otherwise, if the generic linker stuck something in | |
3802 | elf_dt_name, we use that. Otherwise, we just use the file | |
3803 | name. */ | |
3804 | if (soname == NULL || *soname == '\0') | |
3805 | { | |
3806 | soname = elf_dt_name (abfd); | |
3807 | if (soname == NULL || *soname == '\0') | |
3808 | soname = bfd_get_filename (abfd); | |
3809 | } | |
3810 | ||
3811 | /* Save the SONAME because sometimes the linker emulation code | |
3812 | will need to know it. */ | |
3813 | elf_dt_name (abfd) = soname; | |
3814 | ||
7e9f0867 | 3815 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
3816 | if (ret < 0) |
3817 | goto error_return; | |
3818 | ||
3819 | /* If we have already included this dynamic object in the | |
3820 | link, just ignore it. There is no reason to include a | |
3821 | particular dynamic object more than once. */ | |
3822 | if (ret > 0) | |
3823 | return TRUE; | |
7ee314fa AM |
3824 | |
3825 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 3826 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
3827 | } |
3828 | ||
3829 | /* If this is a dynamic object, we always link against the .dynsym | |
3830 | symbol table, not the .symtab symbol table. The dynamic linker | |
3831 | will only see the .dynsym symbol table, so there is no reason to | |
3832 | look at .symtab for a dynamic object. */ | |
3833 | ||
3834 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
3835 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3836 | else | |
3837 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3838 | ||
3839 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
3840 | ||
3841 | /* The sh_info field of the symtab header tells us where the | |
3842 | external symbols start. We don't care about the local symbols at | |
3843 | this point. */ | |
3844 | if (elf_bad_symtab (abfd)) | |
3845 | { | |
3846 | extsymcount = symcount; | |
3847 | extsymoff = 0; | |
3848 | } | |
3849 | else | |
3850 | { | |
3851 | extsymcount = symcount - hdr->sh_info; | |
3852 | extsymoff = hdr->sh_info; | |
3853 | } | |
3854 | ||
f45794cb | 3855 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 3856 | if (extsymcount != 0) |
4ad4eba5 AM |
3857 | { |
3858 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3859 | NULL, NULL, NULL); | |
3860 | if (isymbuf == NULL) | |
3861 | goto error_return; | |
3862 | ||
4ad4eba5 | 3863 | if (sym_hash == NULL) |
012b2306 AM |
3864 | { |
3865 | /* We store a pointer to the hash table entry for each | |
3866 | external symbol. */ | |
3867 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
3868 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); | |
3869 | if (sym_hash == NULL) | |
3870 | goto error_free_sym; | |
3871 | elf_sym_hashes (abfd) = sym_hash; | |
3872 | } | |
4ad4eba5 AM |
3873 | } |
3874 | ||
3875 | if (dynamic) | |
3876 | { | |
3877 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
3878 | if (!_bfd_elf_slurp_version_tables (abfd, |
3879 | info->default_imported_symver)) | |
4ad4eba5 AM |
3880 | goto error_free_sym; |
3881 | ||
3882 | /* Read in the symbol versions, but don't bother to convert them | |
3883 | to internal format. */ | |
3884 | if (elf_dynversym (abfd) != 0) | |
3885 | { | |
3886 | Elf_Internal_Shdr *versymhdr; | |
3887 | ||
3888 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 3889 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
3890 | if (extversym == NULL) |
3891 | goto error_free_sym; | |
3892 | amt = versymhdr->sh_size; | |
3893 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
3894 | || bfd_bread (extversym, amt, abfd) != amt) | |
3895 | goto error_free_vers; | |
3896 | } | |
3897 | } | |
3898 | ||
66eb6687 AM |
3899 | /* If we are loading an as-needed shared lib, save the symbol table |
3900 | state before we start adding symbols. If the lib turns out | |
3901 | to be unneeded, restore the state. */ | |
3902 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
3903 | { | |
3904 | unsigned int i; | |
3905 | size_t entsize; | |
3906 | ||
3907 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
3908 | { | |
3909 | struct bfd_hash_entry *p; | |
2de92251 | 3910 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3911 | |
3912 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
3913 | { |
3914 | h = (struct elf_link_hash_entry *) p; | |
3915 | entsize += htab->root.table.entsize; | |
3916 | if (h->root.type == bfd_link_hash_warning) | |
3917 | entsize += htab->root.table.entsize; | |
3918 | } | |
66eb6687 AM |
3919 | } |
3920 | ||
3921 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 3922 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
3923 | if (old_tab == NULL) |
3924 | goto error_free_vers; | |
3925 | ||
3926 | /* Remember the current objalloc pointer, so that all mem for | |
3927 | symbols added can later be reclaimed. */ | |
3928 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
3929 | if (alloc_mark == NULL) | |
3930 | goto error_free_vers; | |
3931 | ||
5061a885 AM |
3932 | /* Make a special call to the linker "notice" function to |
3933 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 3934 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 3935 | goto error_free_vers; |
5061a885 | 3936 | |
f45794cb AM |
3937 | /* Clone the symbol table. Remember some pointers into the |
3938 | symbol table, and dynamic symbol count. */ | |
3939 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 3940 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
3941 | old_undefs = htab->root.undefs; |
3942 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
3943 | old_table = htab->root.table.table; |
3944 | old_size = htab->root.table.size; | |
3945 | old_count = htab->root.table.count; | |
66eb6687 | 3946 | old_dynsymcount = htab->dynsymcount; |
a4542f1b | 3947 | old_dynstr_size = _bfd_elf_strtab_size (htab->dynstr); |
66eb6687 AM |
3948 | |
3949 | for (i = 0; i < htab->root.table.size; i++) | |
3950 | { | |
3951 | struct bfd_hash_entry *p; | |
2de92251 | 3952 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3953 | |
3954 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
3955 | { | |
3956 | memcpy (old_ent, p, htab->root.table.entsize); | |
3957 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
3958 | h = (struct elf_link_hash_entry *) p; |
3959 | if (h->root.type == bfd_link_hash_warning) | |
3960 | { | |
3961 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
3962 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
3963 | } | |
66eb6687 AM |
3964 | } |
3965 | } | |
3966 | } | |
4ad4eba5 | 3967 | |
66eb6687 | 3968 | weaks = NULL; |
4ad4eba5 AM |
3969 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
3970 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
3971 | isym < isymend; | |
3972 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
3973 | { | |
3974 | int bind; | |
3975 | bfd_vma value; | |
af44c138 | 3976 | asection *sec, *new_sec; |
4ad4eba5 AM |
3977 | flagword flags; |
3978 | const char *name; | |
3979 | struct elf_link_hash_entry *h; | |
90c984fc | 3980 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
3981 | bfd_boolean definition; |
3982 | bfd_boolean size_change_ok; | |
3983 | bfd_boolean type_change_ok; | |
3984 | bfd_boolean new_weakdef; | |
37a9e49a L |
3985 | bfd_boolean new_weak; |
3986 | bfd_boolean old_weak; | |
4ad4eba5 | 3987 | bfd_boolean override; |
a4d8e49b | 3988 | bfd_boolean common; |
4ad4eba5 AM |
3989 | unsigned int old_alignment; |
3990 | bfd *old_bfd; | |
6e33951e | 3991 | bfd_boolean matched; |
4ad4eba5 AM |
3992 | |
3993 | override = FALSE; | |
3994 | ||
3995 | flags = BSF_NO_FLAGS; | |
3996 | sec = NULL; | |
3997 | value = isym->st_value; | |
a4d8e49b | 3998 | common = bed->common_definition (isym); |
4ad4eba5 AM |
3999 | |
4000 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 4001 | switch (bind) |
4ad4eba5 | 4002 | { |
3e7a7d11 | 4003 | case STB_LOCAL: |
4ad4eba5 AM |
4004 | /* This should be impossible, since ELF requires that all |
4005 | global symbols follow all local symbols, and that sh_info | |
4006 | point to the first global symbol. Unfortunately, Irix 5 | |
4007 | screws this up. */ | |
4008 | continue; | |
3e7a7d11 NC |
4009 | |
4010 | case STB_GLOBAL: | |
a4d8e49b | 4011 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 4012 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
4013 | break; |
4014 | ||
4015 | case STB_WEAK: | |
4016 | flags = BSF_WEAK; | |
4017 | break; | |
4018 | ||
4019 | case STB_GNU_UNIQUE: | |
4020 | flags = BSF_GNU_UNIQUE; | |
4021 | break; | |
4022 | ||
4023 | default: | |
4ad4eba5 | 4024 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 4025 | break; |
4ad4eba5 AM |
4026 | } |
4027 | ||
4028 | if (isym->st_shndx == SHN_UNDEF) | |
4029 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4030 | else if (isym->st_shndx == SHN_ABS) |
4031 | sec = bfd_abs_section_ptr; | |
4032 | else if (isym->st_shndx == SHN_COMMON) | |
4033 | { | |
4034 | sec = bfd_com_section_ptr; | |
4035 | /* What ELF calls the size we call the value. What ELF | |
4036 | calls the value we call the alignment. */ | |
4037 | value = isym->st_size; | |
4038 | } | |
4039 | else | |
4ad4eba5 AM |
4040 | { |
4041 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4042 | if (sec == NULL) | |
4043 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4044 | else if (discarded_section (sec)) |
529fcb95 | 4045 | { |
e5d08002 L |
4046 | /* Symbols from discarded section are undefined. We keep |
4047 | its visibility. */ | |
529fcb95 PB |
4048 | sec = bfd_und_section_ptr; |
4049 | isym->st_shndx = SHN_UNDEF; | |
4050 | } | |
4ad4eba5 AM |
4051 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4052 | value -= sec->vma; | |
4053 | } | |
4ad4eba5 AM |
4054 | |
4055 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4056 | isym->st_name); | |
4057 | if (name == NULL) | |
4058 | goto error_free_vers; | |
4059 | ||
4060 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4061 | && (abfd->flags & BFD_PLUGIN) != 0) |
4062 | { | |
4063 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4064 | ||
4065 | if (xc == NULL) | |
4066 | { | |
4067 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4068 | | SEC_EXCLUDE); | |
4069 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4070 | if (xc == NULL) | |
4071 | goto error_free_vers; | |
4072 | } | |
4073 | sec = xc; | |
4074 | } | |
4075 | else if (isym->st_shndx == SHN_COMMON | |
4076 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4077 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4078 | { |
4079 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4080 | ||
4081 | if (tcomm == NULL) | |
4082 | { | |
02d00247 AM |
4083 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4084 | | SEC_LINKER_CREATED); | |
4085 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4086 | if (tcomm == NULL) |
4ad4eba5 AM |
4087 | goto error_free_vers; |
4088 | } | |
4089 | sec = tcomm; | |
4090 | } | |
66eb6687 | 4091 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4092 | { |
66eb6687 AM |
4093 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4094 | &sec, &value)) | |
4ad4eba5 AM |
4095 | goto error_free_vers; |
4096 | ||
4097 | /* The hook function sets the name to NULL if this symbol | |
4098 | should be skipped for some reason. */ | |
4099 | if (name == NULL) | |
4100 | continue; | |
4101 | } | |
4102 | ||
4103 | /* Sanity check that all possibilities were handled. */ | |
4104 | if (sec == NULL) | |
4105 | { | |
4106 | bfd_set_error (bfd_error_bad_value); | |
4107 | goto error_free_vers; | |
4108 | } | |
4109 | ||
191c0c42 AM |
4110 | /* Silently discard TLS symbols from --just-syms. There's |
4111 | no way to combine a static TLS block with a new TLS block | |
4112 | for this executable. */ | |
4113 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4114 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4115 | continue; | |
4116 | ||
4ad4eba5 AM |
4117 | if (bfd_is_und_section (sec) |
4118 | || bfd_is_com_section (sec)) | |
4119 | definition = FALSE; | |
4120 | else | |
4121 | definition = TRUE; | |
4122 | ||
4123 | size_change_ok = FALSE; | |
66eb6687 | 4124 | type_change_ok = bed->type_change_ok; |
37a9e49a | 4125 | old_weak = FALSE; |
6e33951e | 4126 | matched = FALSE; |
4ad4eba5 AM |
4127 | old_alignment = 0; |
4128 | old_bfd = NULL; | |
af44c138 | 4129 | new_sec = sec; |
4ad4eba5 | 4130 | |
66eb6687 | 4131 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4132 | { |
4133 | Elf_Internal_Versym iver; | |
4134 | unsigned int vernum = 0; | |
4135 | bfd_boolean skip; | |
4136 | ||
fc0e6df6 | 4137 | if (ever == NULL) |
4ad4eba5 | 4138 | { |
fc0e6df6 PB |
4139 | if (info->default_imported_symver) |
4140 | /* Use the default symbol version created earlier. */ | |
4141 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4142 | else | |
4143 | iver.vs_vers = 0; | |
4144 | } | |
4145 | else | |
4146 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4147 | ||
4148 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4149 | ||
4150 | /* If this is a hidden symbol, or if it is not version | |
4151 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4152 | However, we do not modify a non-hidden absolute symbol |
4153 | if it is not a function, because it might be the version | |
4154 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4155 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4156 | || (vernum > 1 |
4157 | && (!bfd_is_abs_section (sec) | |
4158 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4159 | { |
4160 | const char *verstr; | |
4161 | size_t namelen, verlen, newlen; | |
4162 | char *newname, *p; | |
4163 | ||
4164 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4165 | { |
fc0e6df6 PB |
4166 | if (vernum > elf_tdata (abfd)->cverdefs) |
4167 | verstr = NULL; | |
4168 | else if (vernum > 1) | |
4169 | verstr = | |
4170 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4171 | else | |
4172 | verstr = ""; | |
4ad4eba5 | 4173 | |
fc0e6df6 | 4174 | if (verstr == NULL) |
4ad4eba5 | 4175 | { |
fc0e6df6 PB |
4176 | (*_bfd_error_handler) |
4177 | (_("%B: %s: invalid version %u (max %d)"), | |
4178 | abfd, name, vernum, | |
4179 | elf_tdata (abfd)->cverdefs); | |
4180 | bfd_set_error (bfd_error_bad_value); | |
4181 | goto error_free_vers; | |
4ad4eba5 | 4182 | } |
fc0e6df6 PB |
4183 | } |
4184 | else | |
4185 | { | |
4186 | /* We cannot simply test for the number of | |
4187 | entries in the VERNEED section since the | |
4188 | numbers for the needed versions do not start | |
4189 | at 0. */ | |
4190 | Elf_Internal_Verneed *t; | |
4191 | ||
4192 | verstr = NULL; | |
4193 | for (t = elf_tdata (abfd)->verref; | |
4194 | t != NULL; | |
4195 | t = t->vn_nextref) | |
4ad4eba5 | 4196 | { |
fc0e6df6 | 4197 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4198 | |
fc0e6df6 PB |
4199 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4200 | { | |
4201 | if (a->vna_other == vernum) | |
4ad4eba5 | 4202 | { |
fc0e6df6 PB |
4203 | verstr = a->vna_nodename; |
4204 | break; | |
4ad4eba5 | 4205 | } |
4ad4eba5 | 4206 | } |
fc0e6df6 PB |
4207 | if (a != NULL) |
4208 | break; | |
4209 | } | |
4210 | if (verstr == NULL) | |
4211 | { | |
4212 | (*_bfd_error_handler) | |
4213 | (_("%B: %s: invalid needed version %d"), | |
4214 | abfd, name, vernum); | |
4215 | bfd_set_error (bfd_error_bad_value); | |
4216 | goto error_free_vers; | |
4ad4eba5 | 4217 | } |
4ad4eba5 | 4218 | } |
fc0e6df6 PB |
4219 | |
4220 | namelen = strlen (name); | |
4221 | verlen = strlen (verstr); | |
4222 | newlen = namelen + verlen + 2; | |
4223 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4224 | && isym->st_shndx != SHN_UNDEF) | |
4225 | ++newlen; | |
4226 | ||
a50b1753 | 4227 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4228 | if (newname == NULL) |
4229 | goto error_free_vers; | |
4230 | memcpy (newname, name, namelen); | |
4231 | p = newname + namelen; | |
4232 | *p++ = ELF_VER_CHR; | |
4233 | /* If this is a defined non-hidden version symbol, | |
4234 | we add another @ to the name. This indicates the | |
4235 | default version of the symbol. */ | |
4236 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4237 | && isym->st_shndx != SHN_UNDEF) | |
4238 | *p++ = ELF_VER_CHR; | |
4239 | memcpy (p, verstr, verlen + 1); | |
4240 | ||
4241 | name = newname; | |
4ad4eba5 AM |
4242 | } |
4243 | ||
cd3416da AM |
4244 | /* If this symbol has default visibility and the user has |
4245 | requested we not re-export it, then mark it as hidden. */ | |
a0d49154 | 4246 | if (!bfd_is_und_section (sec) |
cd3416da | 4247 | && !dynamic |
ce875075 | 4248 | && abfd->no_export |
cd3416da AM |
4249 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4250 | isym->st_other = (STV_HIDDEN | |
4251 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4252 | ||
4f3fedcf AM |
4253 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4254 | sym_hash, &old_bfd, &old_weak, | |
4255 | &old_alignment, &skip, &override, | |
6e33951e L |
4256 | &type_change_ok, &size_change_ok, |
4257 | &matched)) | |
4ad4eba5 AM |
4258 | goto error_free_vers; |
4259 | ||
4260 | if (skip) | |
4261 | continue; | |
4262 | ||
6e33951e L |
4263 | /* Override a definition only if the new symbol matches the |
4264 | existing one. */ | |
4265 | if (override && matched) | |
4ad4eba5 AM |
4266 | definition = FALSE; |
4267 | ||
4268 | h = *sym_hash; | |
4269 | while (h->root.type == bfd_link_hash_indirect | |
4270 | || h->root.type == bfd_link_hash_warning) | |
4271 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4272 | ||
4ad4eba5 | 4273 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4274 | && vernum > 1 |
4275 | && definition) | |
4276 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4277 | } | |
4278 | ||
4279 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4280 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4281 | (struct bfd_link_hash_entry **) sym_hash))) |
4282 | goto error_free_vers; | |
4283 | ||
4284 | h = *sym_hash; | |
90c984fc L |
4285 | /* We need to make sure that indirect symbol dynamic flags are |
4286 | updated. */ | |
4287 | hi = h; | |
4ad4eba5 AM |
4288 | while (h->root.type == bfd_link_hash_indirect |
4289 | || h->root.type == bfd_link_hash_warning) | |
4290 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4291 | |
4ad4eba5 AM |
4292 | *sym_hash = h; |
4293 | ||
37a9e49a | 4294 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4295 | new_weakdef = FALSE; |
4296 | if (dynamic | |
4297 | && definition | |
37a9e49a | 4298 | && new_weak |
fcb93ecf | 4299 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4300 | && is_elf_hash_table (htab) |
f6e332e6 | 4301 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4302 | { |
4303 | /* Keep a list of all weak defined non function symbols from | |
4304 | a dynamic object, using the weakdef field. Later in this | |
4305 | function we will set the weakdef field to the correct | |
4306 | value. We only put non-function symbols from dynamic | |
4307 | objects on this list, because that happens to be the only | |
4308 | time we need to know the normal symbol corresponding to a | |
4309 | weak symbol, and the information is time consuming to | |
4310 | figure out. If the weakdef field is not already NULL, | |
4311 | then this symbol was already defined by some previous | |
4312 | dynamic object, and we will be using that previous | |
4313 | definition anyhow. */ | |
4314 | ||
f6e332e6 | 4315 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4316 | weaks = h; |
4317 | new_weakdef = TRUE; | |
4318 | } | |
4319 | ||
4320 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4321 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4322 | && h->root.type == bfd_link_hash_common) |
4323 | { | |
4324 | unsigned int align; | |
4325 | ||
a4d8e49b | 4326 | if (common) |
af44c138 L |
4327 | align = bfd_log2 (isym->st_value); |
4328 | else | |
4329 | { | |
4330 | /* The new symbol is a common symbol in a shared object. | |
4331 | We need to get the alignment from the section. */ | |
4332 | align = new_sec->alignment_power; | |
4333 | } | |
595213d4 | 4334 | if (align > old_alignment) |
4ad4eba5 AM |
4335 | h->root.u.c.p->alignment_power = align; |
4336 | else | |
4337 | h->root.u.c.p->alignment_power = old_alignment; | |
4338 | } | |
4339 | ||
66eb6687 | 4340 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4341 | { |
4f3fedcf AM |
4342 | /* Set a flag in the hash table entry indicating the type of |
4343 | reference or definition we just found. A dynamic symbol | |
4344 | is one which is referenced or defined by both a regular | |
4345 | object and a shared object. */ | |
4346 | bfd_boolean dynsym = FALSE; | |
4347 | ||
4348 | /* Plugin symbols aren't normal. Don't set def_regular or | |
4349 | ref_regular for them, or make them dynamic. */ | |
4350 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4351 | ; | |
4352 | else if (! dynamic) | |
4353 | { | |
4354 | if (! definition) | |
4355 | { | |
4356 | h->ref_regular = 1; | |
4357 | if (bind != STB_WEAK) | |
4358 | h->ref_regular_nonweak = 1; | |
4359 | } | |
4360 | else | |
4361 | { | |
4362 | h->def_regular = 1; | |
4363 | if (h->def_dynamic) | |
4364 | { | |
4365 | h->def_dynamic = 0; | |
4366 | h->ref_dynamic = 1; | |
4367 | } | |
4368 | } | |
4369 | ||
4370 | /* If the indirect symbol has been forced local, don't | |
4371 | make the real symbol dynamic. */ | |
4372 | if ((h == hi || !hi->forced_local) | |
0e1862bb | 4373 | && (bfd_link_dll (info) |
4f3fedcf AM |
4374 | || h->def_dynamic |
4375 | || h->ref_dynamic)) | |
4376 | dynsym = TRUE; | |
4377 | } | |
4378 | else | |
4379 | { | |
4380 | if (! definition) | |
4381 | { | |
4382 | h->ref_dynamic = 1; | |
4383 | hi->ref_dynamic = 1; | |
4384 | } | |
4385 | else | |
4386 | { | |
4387 | h->def_dynamic = 1; | |
4388 | hi->def_dynamic = 1; | |
4389 | } | |
4390 | ||
4391 | /* If the indirect symbol has been forced local, don't | |
4392 | make the real symbol dynamic. */ | |
4393 | if ((h == hi || !hi->forced_local) | |
4394 | && (h->def_regular | |
4395 | || h->ref_regular | |
4396 | || (h->u.weakdef != NULL | |
4397 | && ! new_weakdef | |
4398 | && h->u.weakdef->dynindx != -1))) | |
4399 | dynsym = TRUE; | |
4400 | } | |
4401 | ||
4402 | /* Check to see if we need to add an indirect symbol for | |
4403 | the default name. */ | |
4404 | if (definition | |
4405 | || (!override && h->root.type == bfd_link_hash_common)) | |
4406 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4407 | sec, value, &old_bfd, &dynsym)) | |
4408 | goto error_free_vers; | |
4ad4eba5 AM |
4409 | |
4410 | /* Check the alignment when a common symbol is involved. This | |
4411 | can change when a common symbol is overridden by a normal | |
4412 | definition or a common symbol is ignored due to the old | |
4413 | normal definition. We need to make sure the maximum | |
4414 | alignment is maintained. */ | |
a4d8e49b | 4415 | if ((old_alignment || common) |
4ad4eba5 AM |
4416 | && h->root.type != bfd_link_hash_common) |
4417 | { | |
4418 | unsigned int common_align; | |
4419 | unsigned int normal_align; | |
4420 | unsigned int symbol_align; | |
4421 | bfd *normal_bfd; | |
4422 | bfd *common_bfd; | |
4423 | ||
3a81e825 AM |
4424 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
4425 | || h->root.type == bfd_link_hash_defweak); | |
4426 | ||
4ad4eba5 AM |
4427 | symbol_align = ffs (h->root.u.def.value) - 1; |
4428 | if (h->root.u.def.section->owner != NULL | |
4429 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
4430 | { | |
4431 | normal_align = h->root.u.def.section->alignment_power; | |
4432 | if (normal_align > symbol_align) | |
4433 | normal_align = symbol_align; | |
4434 | } | |
4435 | else | |
4436 | normal_align = symbol_align; | |
4437 | ||
4438 | if (old_alignment) | |
4439 | { | |
4440 | common_align = old_alignment; | |
4441 | common_bfd = old_bfd; | |
4442 | normal_bfd = abfd; | |
4443 | } | |
4444 | else | |
4445 | { | |
4446 | common_align = bfd_log2 (isym->st_value); | |
4447 | common_bfd = abfd; | |
4448 | normal_bfd = old_bfd; | |
4449 | } | |
4450 | ||
4451 | if (normal_align < common_align) | |
d07676f8 NC |
4452 | { |
4453 | /* PR binutils/2735 */ | |
4454 | if (normal_bfd == NULL) | |
4455 | (*_bfd_error_handler) | |
4f3fedcf AM |
4456 | (_("Warning: alignment %u of common symbol `%s' in %B is" |
4457 | " greater than the alignment (%u) of its section %A"), | |
d07676f8 NC |
4458 | common_bfd, h->root.u.def.section, |
4459 | 1 << common_align, name, 1 << normal_align); | |
4460 | else | |
4461 | (*_bfd_error_handler) | |
4462 | (_("Warning: alignment %u of symbol `%s' in %B" | |
4463 | " is smaller than %u in %B"), | |
4464 | normal_bfd, common_bfd, | |
4465 | 1 << normal_align, name, 1 << common_align); | |
4466 | } | |
4ad4eba5 AM |
4467 | } |
4468 | ||
83ad0046 | 4469 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
4470 | if (isym->st_size != 0 |
4471 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
4472 | && (definition || h->size == 0)) |
4473 | { | |
83ad0046 L |
4474 | if (h->size != 0 |
4475 | && h->size != isym->st_size | |
4476 | && ! size_change_ok) | |
4ad4eba5 | 4477 | (*_bfd_error_handler) |
d003868e AM |
4478 | (_("Warning: size of symbol `%s' changed" |
4479 | " from %lu in %B to %lu in %B"), | |
4480 | old_bfd, abfd, | |
4ad4eba5 | 4481 | name, (unsigned long) h->size, |
d003868e | 4482 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4483 | |
4484 | h->size = isym->st_size; | |
4485 | } | |
4486 | ||
4487 | /* If this is a common symbol, then we always want H->SIZE | |
4488 | to be the size of the common symbol. The code just above | |
4489 | won't fix the size if a common symbol becomes larger. We | |
4490 | don't warn about a size change here, because that is | |
4f3fedcf | 4491 | covered by --warn-common. Allow changes between different |
fcb93ecf | 4492 | function types. */ |
4ad4eba5 AM |
4493 | if (h->root.type == bfd_link_hash_common) |
4494 | h->size = h->root.u.c.size; | |
4495 | ||
4496 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
4497 | && ((definition && !new_weak) |
4498 | || (old_weak && h->root.type == bfd_link_hash_common) | |
4499 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 4500 | { |
2955ec4c L |
4501 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4502 | ||
4503 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4504 | symbol. */ | |
4505 | if (type == STT_GNU_IFUNC | |
4506 | && (abfd->flags & DYNAMIC) != 0) | |
4507 | type = STT_FUNC; | |
4ad4eba5 | 4508 | |
2955ec4c L |
4509 | if (h->type != type) |
4510 | { | |
4511 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
4512 | (*_bfd_error_handler) | |
4513 | (_("Warning: type of symbol `%s' changed" | |
4514 | " from %d to %d in %B"), | |
4515 | abfd, name, h->type, type); | |
4516 | ||
4517 | h->type = type; | |
4518 | } | |
4ad4eba5 AM |
4519 | } |
4520 | ||
54ac0771 | 4521 | /* Merge st_other field. */ |
b8417128 | 4522 | elf_merge_st_other (abfd, h, isym, sec, definition, dynamic); |
4ad4eba5 | 4523 | |
c3df8c14 | 4524 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
4525 | if (definition |
4526 | && (sec->flags & SEC_DEBUGGING) | |
4527 | && !bfd_link_relocatable (info)) | |
c3df8c14 AM |
4528 | dynsym = FALSE; |
4529 | ||
4f3fedcf AM |
4530 | /* Nor should we make plugin symbols dynamic. */ |
4531 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4532 | dynsym = FALSE; | |
4533 | ||
35fc36a8 | 4534 | if (definition) |
35399224 L |
4535 | { |
4536 | h->target_internal = isym->st_target_internal; | |
4537 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4538 | } | |
35fc36a8 | 4539 | |
4ad4eba5 AM |
4540 | if (definition && !dynamic) |
4541 | { | |
4542 | char *p = strchr (name, ELF_VER_CHR); | |
4543 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4544 | { | |
4545 | /* Queue non-default versions so that .symver x, x@FOO | |
4546 | aliases can be checked. */ | |
66eb6687 | 4547 | if (!nondeflt_vers) |
4ad4eba5 | 4548 | { |
66eb6687 AM |
4549 | amt = ((isymend - isym + 1) |
4550 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
4551 | nondeflt_vers |
4552 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4553 | if (!nondeflt_vers) |
4554 | goto error_free_vers; | |
4ad4eba5 | 4555 | } |
66eb6687 | 4556 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4557 | } |
4558 | } | |
4559 | ||
4560 | if (dynsym && h->dynindx == -1) | |
4561 | { | |
c152c796 | 4562 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4563 | goto error_free_vers; |
f6e332e6 | 4564 | if (h->u.weakdef != NULL |
4ad4eba5 | 4565 | && ! new_weakdef |
f6e332e6 | 4566 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4567 | { |
66eb6687 | 4568 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4569 | goto error_free_vers; |
4570 | } | |
4571 | } | |
4572 | else if (dynsym && h->dynindx != -1) | |
4573 | /* If the symbol already has a dynamic index, but | |
4574 | visibility says it should not be visible, turn it into | |
4575 | a local symbol. */ | |
4576 | switch (ELF_ST_VISIBILITY (h->other)) | |
4577 | { | |
4578 | case STV_INTERNAL: | |
4579 | case STV_HIDDEN: | |
4580 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4581 | dynsym = FALSE; | |
4582 | break; | |
4583 | } | |
4584 | ||
aef28989 L |
4585 | /* Don't add DT_NEEDED for references from the dummy bfd nor |
4586 | for unmatched symbol. */ | |
4ad4eba5 | 4587 | if (!add_needed |
aef28989 | 4588 | && matched |
4ad4eba5 | 4589 | && definition |
010e5ae2 | 4590 | && ((dynsym |
ffa9430d | 4591 | && h->ref_regular_nonweak |
4f3fedcf AM |
4592 | && (old_bfd == NULL |
4593 | || (old_bfd->flags & BFD_PLUGIN) == 0)) | |
ffa9430d | 4594 | || (h->ref_dynamic_nonweak |
010e5ae2 AM |
4595 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
4596 | && !on_needed_list (elf_dt_name (abfd), htab->needed)))) | |
4ad4eba5 AM |
4597 | { |
4598 | int ret; | |
4599 | const char *soname = elf_dt_name (abfd); | |
4600 | ||
16e4ecc0 AM |
4601 | info->callbacks->minfo ("%!", soname, old_bfd, |
4602 | h->root.root.string); | |
4603 | ||
4ad4eba5 AM |
4604 | /* A symbol from a library loaded via DT_NEEDED of some |
4605 | other library is referenced by a regular object. | |
e56f61be | 4606 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4607 | --no-add-needed is used and the reference was not |
4608 | a weak one. */ | |
4f3fedcf | 4609 | if (old_bfd != NULL |
b918acf9 | 4610 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be L |
4611 | { |
4612 | (*_bfd_error_handler) | |
3cbc5de0 | 4613 | (_("%B: undefined reference to symbol '%s'"), |
4f3fedcf | 4614 | old_bfd, name); |
ff5ac77b | 4615 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
4616 | goto error_free_vers; |
4617 | } | |
4618 | ||
a50b1753 | 4619 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 4620 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 4621 | |
4ad4eba5 | 4622 | add_needed = TRUE; |
7e9f0867 | 4623 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4624 | if (ret < 0) |
4625 | goto error_free_vers; | |
4626 | ||
4627 | BFD_ASSERT (ret == 0); | |
4628 | } | |
4629 | } | |
4630 | } | |
4631 | ||
66eb6687 AM |
4632 | if (extversym != NULL) |
4633 | { | |
4634 | free (extversym); | |
4635 | extversym = NULL; | |
4636 | } | |
4637 | ||
4638 | if (isymbuf != NULL) | |
4639 | { | |
4640 | free (isymbuf); | |
4641 | isymbuf = NULL; | |
4642 | } | |
4643 | ||
4644 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4645 | { | |
4646 | unsigned int i; | |
4647 | ||
4648 | /* Restore the symbol table. */ | |
f45794cb AM |
4649 | old_ent = (char *) old_tab + tabsize; |
4650 | memset (elf_sym_hashes (abfd), 0, | |
4651 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
4652 | htab->root.table.table = old_table; |
4653 | htab->root.table.size = old_size; | |
4654 | htab->root.table.count = old_count; | |
66eb6687 | 4655 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
4656 | htab->root.undefs = old_undefs; |
4657 | htab->root.undefs_tail = old_undefs_tail; | |
d45f8bda | 4658 | _bfd_elf_strtab_restore_size (htab->dynstr, old_dynstr_size); |
66eb6687 AM |
4659 | for (i = 0; i < htab->root.table.size; i++) |
4660 | { | |
4661 | struct bfd_hash_entry *p; | |
4662 | struct elf_link_hash_entry *h; | |
3e0882af L |
4663 | bfd_size_type size; |
4664 | unsigned int alignment_power; | |
66eb6687 AM |
4665 | |
4666 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4667 | { | |
4668 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4669 | if (h->root.type == bfd_link_hash_warning) |
4670 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
a4542f1b AM |
4671 | if (h->dynindx >= old_dynsymcount |
4672 | && h->dynstr_index < old_dynstr_size) | |
66eb6687 | 4673 | _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index); |
2de92251 | 4674 | |
3e0882af L |
4675 | /* Preserve the maximum alignment and size for common |
4676 | symbols even if this dynamic lib isn't on DT_NEEDED | |
a4542f1b | 4677 | since it can still be loaded at run time by another |
3e0882af L |
4678 | dynamic lib. */ |
4679 | if (h->root.type == bfd_link_hash_common) | |
4680 | { | |
4681 | size = h->root.u.c.size; | |
4682 | alignment_power = h->root.u.c.p->alignment_power; | |
4683 | } | |
4684 | else | |
4685 | { | |
4686 | size = 0; | |
4687 | alignment_power = 0; | |
4688 | } | |
66eb6687 AM |
4689 | memcpy (p, old_ent, htab->root.table.entsize); |
4690 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4691 | h = (struct elf_link_hash_entry *) p; |
4692 | if (h->root.type == bfd_link_hash_warning) | |
4693 | { | |
4694 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4695 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
a4542f1b | 4696 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2de92251 | 4697 | } |
a4542f1b | 4698 | if (h->root.type == bfd_link_hash_common) |
3e0882af L |
4699 | { |
4700 | if (size > h->root.u.c.size) | |
4701 | h->root.u.c.size = size; | |
4702 | if (alignment_power > h->root.u.c.p->alignment_power) | |
4703 | h->root.u.c.p->alignment_power = alignment_power; | |
4704 | } | |
66eb6687 AM |
4705 | } |
4706 | } | |
4707 | ||
5061a885 AM |
4708 | /* Make a special call to the linker "notice" function to |
4709 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 4710 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 4711 | goto error_free_vers; |
5061a885 | 4712 | |
66eb6687 AM |
4713 | free (old_tab); |
4714 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4715 | alloc_mark); | |
4716 | if (nondeflt_vers != NULL) | |
4717 | free (nondeflt_vers); | |
4718 | return TRUE; | |
4719 | } | |
2de92251 | 4720 | |
66eb6687 AM |
4721 | if (old_tab != NULL) |
4722 | { | |
e5034e59 | 4723 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 4724 | goto error_free_vers; |
66eb6687 AM |
4725 | free (old_tab); |
4726 | old_tab = NULL; | |
4727 | } | |
4728 | ||
c6e8a9a8 L |
4729 | /* Now that all the symbols from this input file are created, if |
4730 | not performing a relocatable link, handle .symver foo, foo@BAR | |
4731 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 4732 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 AM |
4733 | { |
4734 | bfd_size_type cnt, symidx; | |
4735 | ||
4736 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4737 | { | |
4738 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4739 | char *shortname, *p; | |
4740 | ||
4741 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4742 | if (p == NULL | |
4743 | || (h->root.type != bfd_link_hash_defined | |
4744 | && h->root.type != bfd_link_hash_defweak)) | |
4745 | continue; | |
4746 | ||
4747 | amt = p - h->root.root.string; | |
a50b1753 | 4748 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4749 | if (!shortname) |
4750 | goto error_free_vers; | |
4ad4eba5 AM |
4751 | memcpy (shortname, h->root.root.string, amt); |
4752 | shortname[amt] = '\0'; | |
4753 | ||
4754 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4755 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4756 | FALSE, FALSE, FALSE); |
4757 | if (hi != NULL | |
4758 | && hi->root.type == h->root.type | |
4759 | && hi->root.u.def.value == h->root.u.def.value | |
4760 | && hi->root.u.def.section == h->root.u.def.section) | |
4761 | { | |
4762 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4763 | hi->root.type = bfd_link_hash_indirect; | |
4764 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4765 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4766 | sym_hash = elf_sym_hashes (abfd); |
4767 | if (sym_hash) | |
4768 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4769 | if (sym_hash[symidx] == hi) | |
4770 | { | |
4771 | sym_hash[symidx] = h; | |
4772 | break; | |
4773 | } | |
4774 | } | |
4775 | free (shortname); | |
4776 | } | |
4777 | free (nondeflt_vers); | |
4778 | nondeflt_vers = NULL; | |
4779 | } | |
4780 | ||
4ad4eba5 AM |
4781 | /* Now set the weakdefs field correctly for all the weak defined |
4782 | symbols we found. The only way to do this is to search all the | |
4783 | symbols. Since we only need the information for non functions in | |
4784 | dynamic objects, that's the only time we actually put anything on | |
4785 | the list WEAKS. We need this information so that if a regular | |
4786 | object refers to a symbol defined weakly in a dynamic object, the | |
4787 | real symbol in the dynamic object is also put in the dynamic | |
4788 | symbols; we also must arrange for both symbols to point to the | |
4789 | same memory location. We could handle the general case of symbol | |
4790 | aliasing, but a general symbol alias can only be generated in | |
4791 | assembler code, handling it correctly would be very time | |
4792 | consuming, and other ELF linkers don't handle general aliasing | |
4793 | either. */ | |
4794 | if (weaks != NULL) | |
4795 | { | |
4796 | struct elf_link_hash_entry **hpp; | |
4797 | struct elf_link_hash_entry **hppend; | |
4798 | struct elf_link_hash_entry **sorted_sym_hash; | |
4799 | struct elf_link_hash_entry *h; | |
4800 | size_t sym_count; | |
4801 | ||
4802 | /* Since we have to search the whole symbol list for each weak | |
4803 | defined symbol, search time for N weak defined symbols will be | |
4804 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
4805 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 4806 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
4807 | if (sorted_sym_hash == NULL) |
4808 | goto error_return; | |
4809 | sym_hash = sorted_sym_hash; | |
4810 | hpp = elf_sym_hashes (abfd); | |
4811 | hppend = hpp + extsymcount; | |
4812 | sym_count = 0; | |
4813 | for (; hpp < hppend; hpp++) | |
4814 | { | |
4815 | h = *hpp; | |
4816 | if (h != NULL | |
4817 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 4818 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
4819 | { |
4820 | *sym_hash = h; | |
4821 | sym_hash++; | |
4822 | sym_count++; | |
4823 | } | |
4824 | } | |
4825 | ||
4826 | qsort (sorted_sym_hash, sym_count, | |
4827 | sizeof (struct elf_link_hash_entry *), | |
4828 | elf_sort_symbol); | |
4829 | ||
4830 | while (weaks != NULL) | |
4831 | { | |
4832 | struct elf_link_hash_entry *hlook; | |
4833 | asection *slook; | |
4834 | bfd_vma vlook; | |
ed54588d | 4835 | size_t i, j, idx = 0; |
4ad4eba5 AM |
4836 | |
4837 | hlook = weaks; | |
f6e332e6 AM |
4838 | weaks = hlook->u.weakdef; |
4839 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
4840 | |
4841 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
4842 | || hlook->root.type == bfd_link_hash_defweak | |
4843 | || hlook->root.type == bfd_link_hash_common | |
4844 | || hlook->root.type == bfd_link_hash_indirect); | |
4845 | slook = hlook->root.u.def.section; | |
4846 | vlook = hlook->root.u.def.value; | |
4847 | ||
4ad4eba5 AM |
4848 | i = 0; |
4849 | j = sym_count; | |
14160578 | 4850 | while (i != j) |
4ad4eba5 AM |
4851 | { |
4852 | bfd_signed_vma vdiff; | |
4853 | idx = (i + j) / 2; | |
14160578 | 4854 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4855 | vdiff = vlook - h->root.u.def.value; |
4856 | if (vdiff < 0) | |
4857 | j = idx; | |
4858 | else if (vdiff > 0) | |
4859 | i = idx + 1; | |
4860 | else | |
4861 | { | |
d3435ae8 | 4862 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
4863 | if (sdiff < 0) |
4864 | j = idx; | |
4865 | else if (sdiff > 0) | |
4866 | i = idx + 1; | |
4867 | else | |
14160578 | 4868 | break; |
4ad4eba5 AM |
4869 | } |
4870 | } | |
4871 | ||
4872 | /* We didn't find a value/section match. */ | |
14160578 | 4873 | if (i == j) |
4ad4eba5 AM |
4874 | continue; |
4875 | ||
14160578 AM |
4876 | /* With multiple aliases, or when the weak symbol is already |
4877 | strongly defined, we have multiple matching symbols and | |
4878 | the binary search above may land on any of them. Step | |
4879 | one past the matching symbol(s). */ | |
4880 | while (++idx != j) | |
4881 | { | |
4882 | h = sorted_sym_hash[idx]; | |
4883 | if (h->root.u.def.section != slook | |
4884 | || h->root.u.def.value != vlook) | |
4885 | break; | |
4886 | } | |
4887 | ||
4888 | /* Now look back over the aliases. Since we sorted by size | |
4889 | as well as value and section, we'll choose the one with | |
4890 | the largest size. */ | |
4891 | while (idx-- != i) | |
4ad4eba5 | 4892 | { |
14160578 | 4893 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4894 | |
4895 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
4896 | if (h->root.u.def.section != slook |
4897 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
4898 | break; |
4899 | else if (h != hlook) | |
4900 | { | |
f6e332e6 | 4901 | hlook->u.weakdef = h; |
4ad4eba5 AM |
4902 | |
4903 | /* If the weak definition is in the list of dynamic | |
4904 | symbols, make sure the real definition is put | |
4905 | there as well. */ | |
4906 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
4907 | { | |
c152c796 | 4908 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
4909 | { |
4910 | err_free_sym_hash: | |
4911 | free (sorted_sym_hash); | |
4912 | goto error_return; | |
4913 | } | |
4ad4eba5 AM |
4914 | } |
4915 | ||
4916 | /* If the real definition is in the list of dynamic | |
4917 | symbols, make sure the weak definition is put | |
4918 | there as well. If we don't do this, then the | |
4919 | dynamic loader might not merge the entries for the | |
4920 | real definition and the weak definition. */ | |
4921 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
4922 | { | |
c152c796 | 4923 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 4924 | goto err_free_sym_hash; |
4ad4eba5 AM |
4925 | } |
4926 | break; | |
4927 | } | |
4928 | } | |
4929 | } | |
4930 | ||
4931 | free (sorted_sym_hash); | |
4932 | } | |
4933 | ||
33177bb1 AM |
4934 | if (bed->check_directives |
4935 | && !(*bed->check_directives) (abfd, info)) | |
4936 | return FALSE; | |
85fbca6a | 4937 | |
4ad4eba5 AM |
4938 | /* If this object is the same format as the output object, and it is |
4939 | not a shared library, then let the backend look through the | |
4940 | relocs. | |
4941 | ||
4942 | This is required to build global offset table entries and to | |
4943 | arrange for dynamic relocs. It is not required for the | |
4944 | particular common case of linking non PIC code, even when linking | |
4945 | against shared libraries, but unfortunately there is no way of | |
4946 | knowing whether an object file has been compiled PIC or not. | |
4947 | Looking through the relocs is not particularly time consuming. | |
4948 | The problem is that we must either (1) keep the relocs in memory, | |
4949 | which causes the linker to require additional runtime memory or | |
4950 | (2) read the relocs twice from the input file, which wastes time. | |
4951 | This would be a good case for using mmap. | |
4952 | ||
4953 | I have no idea how to handle linking PIC code into a file of a | |
4954 | different format. It probably can't be done. */ | |
4ad4eba5 | 4955 | if (! dynamic |
66eb6687 | 4956 | && is_elf_hash_table (htab) |
13285a1b | 4957 | && bed->check_relocs != NULL |
39334f3a | 4958 | && elf_object_id (abfd) == elf_hash_table_id (htab) |
f13a99db | 4959 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) |
4ad4eba5 AM |
4960 | { |
4961 | asection *o; | |
4962 | ||
4963 | for (o = abfd->sections; o != NULL; o = o->next) | |
4964 | { | |
4965 | Elf_Internal_Rela *internal_relocs; | |
4966 | bfd_boolean ok; | |
4967 | ||
4968 | if ((o->flags & SEC_RELOC) == 0 | |
4969 | || o->reloc_count == 0 | |
4970 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4971 | && (o->flags & SEC_DEBUGGING) != 0) | |
4972 | || bfd_is_abs_section (o->output_section)) | |
4973 | continue; | |
4974 | ||
4975 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4976 | info->keep_memory); | |
4977 | if (internal_relocs == NULL) | |
4978 | goto error_return; | |
4979 | ||
66eb6687 | 4980 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); |
4ad4eba5 AM |
4981 | |
4982 | if (elf_section_data (o)->relocs != internal_relocs) | |
4983 | free (internal_relocs); | |
4984 | ||
4985 | if (! ok) | |
4986 | goto error_return; | |
4987 | } | |
4988 | } | |
4989 | ||
4990 | /* If this is a non-traditional link, try to optimize the handling | |
4991 | of the .stab/.stabstr sections. */ | |
4992 | if (! dynamic | |
4993 | && ! info->traditional_format | |
66eb6687 | 4994 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
4995 | && (info->strip != strip_all && info->strip != strip_debugger)) |
4996 | { | |
4997 | asection *stabstr; | |
4998 | ||
4999 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
5000 | if (stabstr != NULL) | |
5001 | { | |
5002 | bfd_size_type string_offset = 0; | |
5003 | asection *stab; | |
5004 | ||
5005 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 5006 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
5007 | && (!stab->name[5] || |
5008 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
5009 | && (stab->flags & SEC_MERGE) == 0 | |
5010 | && !bfd_is_abs_section (stab->output_section)) | |
5011 | { | |
5012 | struct bfd_elf_section_data *secdata; | |
5013 | ||
5014 | secdata = elf_section_data (stab); | |
66eb6687 AM |
5015 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
5016 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
5017 | &string_offset)) |
5018 | goto error_return; | |
5019 | if (secdata->sec_info) | |
dbaa2011 | 5020 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
5021 | } |
5022 | } | |
5023 | } | |
5024 | ||
66eb6687 | 5025 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
5026 | { |
5027 | /* Add this bfd to the loaded list. */ | |
5028 | struct elf_link_loaded_list *n; | |
5029 | ||
ca4be51c | 5030 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5031 | if (n == NULL) |
5032 | goto error_return; | |
5033 | n->abfd = abfd; | |
66eb6687 AM |
5034 | n->next = htab->loaded; |
5035 | htab->loaded = n; | |
4ad4eba5 AM |
5036 | } |
5037 | ||
5038 | return TRUE; | |
5039 | ||
5040 | error_free_vers: | |
66eb6687 AM |
5041 | if (old_tab != NULL) |
5042 | free (old_tab); | |
4ad4eba5 AM |
5043 | if (nondeflt_vers != NULL) |
5044 | free (nondeflt_vers); | |
5045 | if (extversym != NULL) | |
5046 | free (extversym); | |
5047 | error_free_sym: | |
5048 | if (isymbuf != NULL) | |
5049 | free (isymbuf); | |
5050 | error_return: | |
5051 | return FALSE; | |
5052 | } | |
5053 | ||
8387904d AM |
5054 | /* Return the linker hash table entry of a symbol that might be |
5055 | satisfied by an archive symbol. Return -1 on error. */ | |
5056 | ||
5057 | struct elf_link_hash_entry * | |
5058 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5059 | struct bfd_link_info *info, | |
5060 | const char *name) | |
5061 | { | |
5062 | struct elf_link_hash_entry *h; | |
5063 | char *p, *copy; | |
5064 | size_t len, first; | |
5065 | ||
2a41f396 | 5066 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
5067 | if (h != NULL) |
5068 | return h; | |
5069 | ||
5070 | /* If this is a default version (the name contains @@), look up the | |
5071 | symbol again with only one `@' as well as without the version. | |
5072 | The effect is that references to the symbol with and without the | |
5073 | version will be matched by the default symbol in the archive. */ | |
5074 | ||
5075 | p = strchr (name, ELF_VER_CHR); | |
5076 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5077 | return h; | |
5078 | ||
5079 | /* First check with only one `@'. */ | |
5080 | len = strlen (name); | |
a50b1753 | 5081 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
5082 | if (copy == NULL) |
5083 | return (struct elf_link_hash_entry *) 0 - 1; | |
5084 | ||
5085 | first = p - name + 1; | |
5086 | memcpy (copy, name, first); | |
5087 | memcpy (copy + first, name + first + 1, len - first); | |
5088 | ||
2a41f396 | 5089 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
5090 | if (h == NULL) |
5091 | { | |
5092 | /* We also need to check references to the symbol without the | |
5093 | version. */ | |
5094 | copy[first - 1] = '\0'; | |
5095 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 5096 | FALSE, FALSE, TRUE); |
8387904d AM |
5097 | } |
5098 | ||
5099 | bfd_release (abfd, copy); | |
5100 | return h; | |
5101 | } | |
5102 | ||
0ad989f9 | 5103 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5104 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5105 | handle versioned symbols. | |
0ad989f9 L |
5106 | |
5107 | Fortunately, ELF archive handling is simpler than that done by | |
5108 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5109 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5110 | symbol is currently undefined, we know that we must pull in that | |
5111 | object file. | |
5112 | ||
5113 | Unfortunately, we do have to make multiple passes over the symbol | |
5114 | table until nothing further is resolved. */ | |
5115 | ||
4ad4eba5 AM |
5116 | static bfd_boolean |
5117 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
5118 | { |
5119 | symindex c; | |
13e570f8 | 5120 | unsigned char *included = NULL; |
0ad989f9 L |
5121 | carsym *symdefs; |
5122 | bfd_boolean loop; | |
5123 | bfd_size_type amt; | |
8387904d AM |
5124 | const struct elf_backend_data *bed; |
5125 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5126 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5127 | |
5128 | if (! bfd_has_map (abfd)) | |
5129 | { | |
5130 | /* An empty archive is a special case. */ | |
5131 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
5132 | return TRUE; | |
5133 | bfd_set_error (bfd_error_no_armap); | |
5134 | return FALSE; | |
5135 | } | |
5136 | ||
5137 | /* Keep track of all symbols we know to be already defined, and all | |
5138 | files we know to be already included. This is to speed up the | |
5139 | second and subsequent passes. */ | |
5140 | c = bfd_ardata (abfd)->symdef_count; | |
5141 | if (c == 0) | |
5142 | return TRUE; | |
5143 | amt = c; | |
13e570f8 AM |
5144 | amt *= sizeof (*included); |
5145 | included = (unsigned char *) bfd_zmalloc (amt); | |
5146 | if (included == NULL) | |
5147 | return FALSE; | |
0ad989f9 L |
5148 | |
5149 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5150 | bed = get_elf_backend_data (abfd); |
5151 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5152 | |
5153 | do | |
5154 | { | |
5155 | file_ptr last; | |
5156 | symindex i; | |
5157 | carsym *symdef; | |
5158 | carsym *symdefend; | |
5159 | ||
5160 | loop = FALSE; | |
5161 | last = -1; | |
5162 | ||
5163 | symdef = symdefs; | |
5164 | symdefend = symdef + c; | |
5165 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5166 | { | |
5167 | struct elf_link_hash_entry *h; | |
5168 | bfd *element; | |
5169 | struct bfd_link_hash_entry *undefs_tail; | |
5170 | symindex mark; | |
5171 | ||
13e570f8 | 5172 | if (included[i]) |
0ad989f9 L |
5173 | continue; |
5174 | if (symdef->file_offset == last) | |
5175 | { | |
5176 | included[i] = TRUE; | |
5177 | continue; | |
5178 | } | |
5179 | ||
8387904d AM |
5180 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5181 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5182 | goto error_return; | |
0ad989f9 L |
5183 | |
5184 | if (h == NULL) | |
5185 | continue; | |
5186 | ||
5187 | if (h->root.type == bfd_link_hash_common) | |
5188 | { | |
5189 | /* We currently have a common symbol. The archive map contains | |
5190 | a reference to this symbol, so we may want to include it. We | |
5191 | only want to include it however, if this archive element | |
5192 | contains a definition of the symbol, not just another common | |
5193 | declaration of it. | |
5194 | ||
5195 | Unfortunately some archivers (including GNU ar) will put | |
5196 | declarations of common symbols into their archive maps, as | |
5197 | well as real definitions, so we cannot just go by the archive | |
5198 | map alone. Instead we must read in the element's symbol | |
5199 | table and check that to see what kind of symbol definition | |
5200 | this is. */ | |
5201 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5202 | continue; | |
5203 | } | |
5204 | else if (h->root.type != bfd_link_hash_undefined) | |
5205 | { | |
5206 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 AM |
5207 | /* Symbol must be defined. Don't check it again. */ |
5208 | included[i] = TRUE; | |
0ad989f9 L |
5209 | continue; |
5210 | } | |
5211 | ||
5212 | /* We need to include this archive member. */ | |
5213 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5214 | if (element == NULL) | |
5215 | goto error_return; | |
5216 | ||
5217 | if (! bfd_check_format (element, bfd_object)) | |
5218 | goto error_return; | |
5219 | ||
0ad989f9 L |
5220 | undefs_tail = info->hash->undefs_tail; |
5221 | ||
0e144ba7 AM |
5222 | if (!(*info->callbacks |
5223 | ->add_archive_element) (info, element, symdef->name, &element)) | |
0ad989f9 | 5224 | goto error_return; |
0e144ba7 | 5225 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5226 | goto error_return; |
5227 | ||
5228 | /* If there are any new undefined symbols, we need to make | |
5229 | another pass through the archive in order to see whether | |
5230 | they can be defined. FIXME: This isn't perfect, because | |
5231 | common symbols wind up on undefs_tail and because an | |
5232 | undefined symbol which is defined later on in this pass | |
5233 | does not require another pass. This isn't a bug, but it | |
5234 | does make the code less efficient than it could be. */ | |
5235 | if (undefs_tail != info->hash->undefs_tail) | |
5236 | loop = TRUE; | |
5237 | ||
5238 | /* Look backward to mark all symbols from this object file | |
5239 | which we have already seen in this pass. */ | |
5240 | mark = i; | |
5241 | do | |
5242 | { | |
5243 | included[mark] = TRUE; | |
5244 | if (mark == 0) | |
5245 | break; | |
5246 | --mark; | |
5247 | } | |
5248 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5249 | ||
5250 | /* We mark subsequent symbols from this object file as we go | |
5251 | on through the loop. */ | |
5252 | last = symdef->file_offset; | |
5253 | } | |
5254 | } | |
5255 | while (loop); | |
5256 | ||
0ad989f9 L |
5257 | free (included); |
5258 | ||
5259 | return TRUE; | |
5260 | ||
5261 | error_return: | |
0ad989f9 L |
5262 | if (included != NULL) |
5263 | free (included); | |
5264 | return FALSE; | |
5265 | } | |
4ad4eba5 AM |
5266 | |
5267 | /* Given an ELF BFD, add symbols to the global hash table as | |
5268 | appropriate. */ | |
5269 | ||
5270 | bfd_boolean | |
5271 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5272 | { | |
5273 | switch (bfd_get_format (abfd)) | |
5274 | { | |
5275 | case bfd_object: | |
5276 | return elf_link_add_object_symbols (abfd, info); | |
5277 | case bfd_archive: | |
5278 | return elf_link_add_archive_symbols (abfd, info); | |
5279 | default: | |
5280 | bfd_set_error (bfd_error_wrong_format); | |
5281 | return FALSE; | |
5282 | } | |
5283 | } | |
5a580b3a | 5284 | \f |
14b1c01e AM |
5285 | struct hash_codes_info |
5286 | { | |
5287 | unsigned long *hashcodes; | |
5288 | bfd_boolean error; | |
5289 | }; | |
a0c8462f | 5290 | |
5a580b3a AM |
5291 | /* This function will be called though elf_link_hash_traverse to store |
5292 | all hash value of the exported symbols in an array. */ | |
5293 | ||
5294 | static bfd_boolean | |
5295 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5296 | { | |
a50b1753 | 5297 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5298 | const char *name; |
5a580b3a AM |
5299 | unsigned long ha; |
5300 | char *alc = NULL; | |
5301 | ||
5a580b3a AM |
5302 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5303 | if (h->dynindx == -1) | |
5304 | return TRUE; | |
5305 | ||
5306 | name = h->root.root.string; | |
422f1182 | 5307 | if (h->versioned >= versioned) |
5a580b3a | 5308 | { |
422f1182 L |
5309 | char *p = strchr (name, ELF_VER_CHR); |
5310 | if (p != NULL) | |
14b1c01e | 5311 | { |
422f1182 L |
5312 | alc = (char *) bfd_malloc (p - name + 1); |
5313 | if (alc == NULL) | |
5314 | { | |
5315 | inf->error = TRUE; | |
5316 | return FALSE; | |
5317 | } | |
5318 | memcpy (alc, name, p - name); | |
5319 | alc[p - name] = '\0'; | |
5320 | name = alc; | |
14b1c01e | 5321 | } |
5a580b3a AM |
5322 | } |
5323 | ||
5324 | /* Compute the hash value. */ | |
5325 | ha = bfd_elf_hash (name); | |
5326 | ||
5327 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5328 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5329 | |
5330 | /* And store it in the struct so that we can put it in the hash table | |
5331 | later. */ | |
f6e332e6 | 5332 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5333 | |
5334 | if (alc != NULL) | |
5335 | free (alc); | |
5336 | ||
5337 | return TRUE; | |
5338 | } | |
5339 | ||
fdc90cb4 JJ |
5340 | struct collect_gnu_hash_codes |
5341 | { | |
5342 | bfd *output_bfd; | |
5343 | const struct elf_backend_data *bed; | |
5344 | unsigned long int nsyms; | |
5345 | unsigned long int maskbits; | |
5346 | unsigned long int *hashcodes; | |
5347 | unsigned long int *hashval; | |
5348 | unsigned long int *indx; | |
5349 | unsigned long int *counts; | |
5350 | bfd_vma *bitmask; | |
5351 | bfd_byte *contents; | |
5352 | long int min_dynindx; | |
5353 | unsigned long int bucketcount; | |
5354 | unsigned long int symindx; | |
5355 | long int local_indx; | |
5356 | long int shift1, shift2; | |
5357 | unsigned long int mask; | |
14b1c01e | 5358 | bfd_boolean error; |
fdc90cb4 JJ |
5359 | }; |
5360 | ||
5361 | /* This function will be called though elf_link_hash_traverse to store | |
5362 | all hash value of the exported symbols in an array. */ | |
5363 | ||
5364 | static bfd_boolean | |
5365 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5366 | { | |
a50b1753 | 5367 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 5368 | const char *name; |
fdc90cb4 JJ |
5369 | unsigned long ha; |
5370 | char *alc = NULL; | |
5371 | ||
fdc90cb4 JJ |
5372 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5373 | if (h->dynindx == -1) | |
5374 | return TRUE; | |
5375 | ||
5376 | /* Ignore also local symbols and undefined symbols. */ | |
5377 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5378 | return TRUE; | |
5379 | ||
5380 | name = h->root.root.string; | |
422f1182 | 5381 | if (h->versioned >= versioned) |
fdc90cb4 | 5382 | { |
422f1182 L |
5383 | char *p = strchr (name, ELF_VER_CHR); |
5384 | if (p != NULL) | |
14b1c01e | 5385 | { |
422f1182 L |
5386 | alc = (char *) bfd_malloc (p - name + 1); |
5387 | if (alc == NULL) | |
5388 | { | |
5389 | s->error = TRUE; | |
5390 | return FALSE; | |
5391 | } | |
5392 | memcpy (alc, name, p - name); | |
5393 | alc[p - name] = '\0'; | |
5394 | name = alc; | |
14b1c01e | 5395 | } |
fdc90cb4 JJ |
5396 | } |
5397 | ||
5398 | /* Compute the hash value. */ | |
5399 | ha = bfd_elf_gnu_hash (name); | |
5400 | ||
5401 | /* Store the found hash value in the array for compute_bucket_count, | |
5402 | and also for .dynsym reordering purposes. */ | |
5403 | s->hashcodes[s->nsyms] = ha; | |
5404 | s->hashval[h->dynindx] = ha; | |
5405 | ++s->nsyms; | |
5406 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5407 | s->min_dynindx = h->dynindx; | |
5408 | ||
5409 | if (alc != NULL) | |
5410 | free (alc); | |
5411 | ||
5412 | return TRUE; | |
5413 | } | |
5414 | ||
5415 | /* This function will be called though elf_link_hash_traverse to do | |
5416 | final dynaminc symbol renumbering. */ | |
5417 | ||
5418 | static bfd_boolean | |
5419 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5420 | { | |
a50b1753 | 5421 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5422 | unsigned long int bucket; |
5423 | unsigned long int val; | |
5424 | ||
fdc90cb4 JJ |
5425 | /* Ignore indirect symbols. */ |
5426 | if (h->dynindx == -1) | |
5427 | return TRUE; | |
5428 | ||
5429 | /* Ignore also local symbols and undefined symbols. */ | |
5430 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5431 | { | |
5432 | if (h->dynindx >= s->min_dynindx) | |
5433 | h->dynindx = s->local_indx++; | |
5434 | return TRUE; | |
5435 | } | |
5436 | ||
5437 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5438 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5439 | & ((s->maskbits >> s->shift1) - 1); | |
5440 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5441 | s->bitmask[val] | |
5442 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5443 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5444 | if (s->counts[bucket] == 1) | |
5445 | /* Last element terminates the chain. */ | |
5446 | val |= 1; | |
5447 | bfd_put_32 (s->output_bfd, val, | |
5448 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5449 | --s->counts[bucket]; | |
5450 | h->dynindx = s->indx[bucket]++; | |
5451 | return TRUE; | |
5452 | } | |
5453 | ||
5454 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5455 | ||
5456 | bfd_boolean | |
5457 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5458 | { | |
5459 | return !(h->forced_local | |
5460 | || h->root.type == bfd_link_hash_undefined | |
5461 | || h->root.type == bfd_link_hash_undefweak | |
5462 | || ((h->root.type == bfd_link_hash_defined | |
5463 | || h->root.type == bfd_link_hash_defweak) | |
5464 | && h->root.u.def.section->output_section == NULL)); | |
5465 | } | |
5466 | ||
5a580b3a AM |
5467 | /* Array used to determine the number of hash table buckets to use |
5468 | based on the number of symbols there are. If there are fewer than | |
5469 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5470 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5471 | than 32771 buckets. */ | |
5472 | ||
5473 | static const size_t elf_buckets[] = | |
5474 | { | |
5475 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5476 | 16411, 32771, 0 | |
5477 | }; | |
5478 | ||
5479 | /* Compute bucket count for hashing table. We do not use a static set | |
5480 | of possible tables sizes anymore. Instead we determine for all | |
5481 | possible reasonable sizes of the table the outcome (i.e., the | |
5482 | number of collisions etc) and choose the best solution. The | |
5483 | weighting functions are not too simple to allow the table to grow | |
5484 | without bounds. Instead one of the weighting factors is the size. | |
5485 | Therefore the result is always a good payoff between few collisions | |
5486 | (= short chain lengths) and table size. */ | |
5487 | static size_t | |
b20dd2ce | 5488 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5489 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5490 | unsigned long int nsyms, | |
5491 | int gnu_hash) | |
5a580b3a | 5492 | { |
5a580b3a | 5493 | size_t best_size = 0; |
5a580b3a | 5494 | unsigned long int i; |
5a580b3a | 5495 | |
5a580b3a AM |
5496 | /* We have a problem here. The following code to optimize the table |
5497 | size requires an integer type with more the 32 bits. If | |
5498 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5499 | #ifdef BFD_HOST_U_64_BIT | |
5500 | if (info->optimize) | |
5501 | { | |
5a580b3a AM |
5502 | size_t minsize; |
5503 | size_t maxsize; | |
5504 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5505 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5506 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5507 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5508 | unsigned long int *counts; |
d40f3da9 | 5509 | bfd_size_type amt; |
0883b6e0 | 5510 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5511 | |
5512 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5513 | that the hashing table must at least have NSYMS/4 and at most | |
5514 | 2*NSYMS buckets. */ | |
5515 | minsize = nsyms / 4; | |
5516 | if (minsize == 0) | |
5517 | minsize = 1; | |
5518 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5519 | if (gnu_hash) |
5520 | { | |
5521 | if (minsize < 2) | |
5522 | minsize = 2; | |
5523 | if ((best_size & 31) == 0) | |
5524 | ++best_size; | |
5525 | } | |
5a580b3a AM |
5526 | |
5527 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5528 | since the size could be large. */ | |
5529 | amt = maxsize; | |
5530 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5531 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5532 | if (counts == NULL) |
fdc90cb4 | 5533 | return 0; |
5a580b3a AM |
5534 | |
5535 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5536 | minimal chain length. The minor criteria is (of course) the size | |
5537 | of the table. */ | |
5538 | for (i = minsize; i < maxsize; ++i) | |
5539 | { | |
5540 | /* Walk through the array of hashcodes and count the collisions. */ | |
5541 | BFD_HOST_U_64_BIT max; | |
5542 | unsigned long int j; | |
5543 | unsigned long int fact; | |
5544 | ||
fdc90cb4 JJ |
5545 | if (gnu_hash && (i & 31) == 0) |
5546 | continue; | |
5547 | ||
5a580b3a AM |
5548 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5549 | ||
5550 | /* Determine how often each hash bucket is used. */ | |
5551 | for (j = 0; j < nsyms; ++j) | |
5552 | ++counts[hashcodes[j] % i]; | |
5553 | ||
5554 | /* For the weight function we need some information about the | |
5555 | pagesize on the target. This is information need not be 100% | |
5556 | accurate. Since this information is not available (so far) we | |
5557 | define it here to a reasonable default value. If it is crucial | |
5558 | to have a better value some day simply define this value. */ | |
5559 | # ifndef BFD_TARGET_PAGESIZE | |
5560 | # define BFD_TARGET_PAGESIZE (4096) | |
5561 | # endif | |
5562 | ||
fdc90cb4 JJ |
5563 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5564 | and the chains. */ | |
5565 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5566 | |
5567 | # if 1 | |
5568 | /* Variant 1: optimize for short chains. We add the squares | |
5569 | of all the chain lengths (which favors many small chain | |
5570 | over a few long chains). */ | |
5571 | for (j = 0; j < i; ++j) | |
5572 | max += counts[j] * counts[j]; | |
5573 | ||
5574 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5575 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5576 | max *= fact * fact; |
5577 | # else | |
5578 | /* Variant 2: Optimize a lot more for small table. Here we | |
5579 | also add squares of the size but we also add penalties for | |
5580 | empty slots (the +1 term). */ | |
5581 | for (j = 0; j < i; ++j) | |
5582 | max += (1 + counts[j]) * (1 + counts[j]); | |
5583 | ||
5584 | /* The overall size of the table is considered, but not as | |
5585 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5586 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5587 | max *= fact; |
5588 | # endif | |
5589 | ||
5590 | /* Compare with current best results. */ | |
5591 | if (max < best_chlen) | |
5592 | { | |
5593 | best_chlen = max; | |
5594 | best_size = i; | |
ca4be51c | 5595 | no_improvement_count = 0; |
5a580b3a | 5596 | } |
0883b6e0 NC |
5597 | /* PR 11843: Avoid futile long searches for the best bucket size |
5598 | when there are a large number of symbols. */ | |
5599 | else if (++no_improvement_count == 100) | |
5600 | break; | |
5a580b3a AM |
5601 | } |
5602 | ||
5603 | free (counts); | |
5604 | } | |
5605 | else | |
5606 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5607 | { | |
5608 | /* This is the fallback solution if no 64bit type is available or if we | |
5609 | are not supposed to spend much time on optimizations. We select the | |
5610 | bucket count using a fixed set of numbers. */ | |
5611 | for (i = 0; elf_buckets[i] != 0; i++) | |
5612 | { | |
5613 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5614 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5615 | break; |
5616 | } | |
fdc90cb4 JJ |
5617 | if (gnu_hash && best_size < 2) |
5618 | best_size = 2; | |
5a580b3a AM |
5619 | } |
5620 | ||
5a580b3a AM |
5621 | return best_size; |
5622 | } | |
5623 | ||
d0bf826b AM |
5624 | /* Size any SHT_GROUP section for ld -r. */ |
5625 | ||
5626 | bfd_boolean | |
5627 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5628 | { | |
5629 | bfd *ibfd; | |
5630 | ||
c72f2fb2 | 5631 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b AM |
5632 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
5633 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5634 | return FALSE; | |
5635 | return TRUE; | |
5636 | } | |
5637 | ||
04c3a755 NS |
5638 | /* Set a default stack segment size. The value in INFO wins. If it |
5639 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
5640 | undefined it is initialized. */ | |
5641 | ||
5642 | bfd_boolean | |
5643 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
5644 | struct bfd_link_info *info, | |
5645 | const char *legacy_symbol, | |
5646 | bfd_vma default_size) | |
5647 | { | |
5648 | struct elf_link_hash_entry *h = NULL; | |
5649 | ||
5650 | /* Look for legacy symbol. */ | |
5651 | if (legacy_symbol) | |
5652 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
5653 | FALSE, FALSE, FALSE); | |
5654 | if (h && (h->root.type == bfd_link_hash_defined | |
5655 | || h->root.type == bfd_link_hash_defweak) | |
5656 | && h->def_regular | |
5657 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
5658 | { | |
5659 | /* The symbol has no type if specified on the command line. */ | |
5660 | h->type = STT_OBJECT; | |
5661 | if (info->stacksize) | |
5662 | (*_bfd_error_handler) (_("%B: stack size specified and %s set"), | |
5663 | output_bfd, legacy_symbol); | |
5664 | else if (h->root.u.def.section != bfd_abs_section_ptr) | |
5665 | (*_bfd_error_handler) (_("%B: %s not absolute"), | |
5666 | output_bfd, legacy_symbol); | |
5667 | else | |
5668 | info->stacksize = h->root.u.def.value; | |
5669 | } | |
5670 | ||
5671 | if (!info->stacksize) | |
5672 | /* If the user didn't set a size, or explicitly inhibit the | |
5673 | size, set it now. */ | |
5674 | info->stacksize = default_size; | |
5675 | ||
5676 | /* Provide the legacy symbol, if it is referenced. */ | |
5677 | if (h && (h->root.type == bfd_link_hash_undefined | |
5678 | || h->root.type == bfd_link_hash_undefweak)) | |
5679 | { | |
5680 | struct bfd_link_hash_entry *bh = NULL; | |
5681 | ||
5682 | if (!(_bfd_generic_link_add_one_symbol | |
5683 | (info, output_bfd, legacy_symbol, | |
5684 | BSF_GLOBAL, bfd_abs_section_ptr, | |
5685 | info->stacksize >= 0 ? info->stacksize : 0, | |
5686 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
5687 | return FALSE; | |
5688 | ||
5689 | h = (struct elf_link_hash_entry *) bh; | |
5690 | h->def_regular = 1; | |
5691 | h->type = STT_OBJECT; | |
5692 | } | |
5693 | ||
5694 | return TRUE; | |
5695 | } | |
5696 | ||
5a580b3a AM |
5697 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5698 | called by the ELF linker emulation before_allocation routine. We | |
5699 | must set the sizes of the sections before the linker sets the | |
5700 | addresses of the various sections. */ | |
5701 | ||
5702 | bfd_boolean | |
5703 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5704 | const char *soname, | |
5705 | const char *rpath, | |
5706 | const char *filter_shlib, | |
7ee314fa AM |
5707 | const char *audit, |
5708 | const char *depaudit, | |
5a580b3a AM |
5709 | const char * const *auxiliary_filters, |
5710 | struct bfd_link_info *info, | |
fd91d419 | 5711 | asection **sinterpptr) |
5a580b3a AM |
5712 | { |
5713 | bfd_size_type soname_indx; | |
5714 | bfd *dynobj; | |
5715 | const struct elf_backend_data *bed; | |
28caa186 | 5716 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5717 | |
5718 | *sinterpptr = NULL; | |
5719 | ||
5720 | soname_indx = (bfd_size_type) -1; | |
5721 | ||
5722 | if (!is_elf_hash_table (info->hash)) | |
5723 | return TRUE; | |
5724 | ||
6bfdb61b | 5725 | bed = get_elf_backend_data (output_bfd); |
04c3a755 NS |
5726 | |
5727 | /* Any syms created from now on start with -1 in | |
5728 | got.refcount/offset and plt.refcount/offset. */ | |
5729 | elf_hash_table (info)->init_got_refcount | |
5730 | = elf_hash_table (info)->init_got_offset; | |
5731 | elf_hash_table (info)->init_plt_refcount | |
5732 | = elf_hash_table (info)->init_plt_offset; | |
5733 | ||
0e1862bb | 5734 | if (bfd_link_relocatable (info) |
04c3a755 NS |
5735 | && !_bfd_elf_size_group_sections (info)) |
5736 | return FALSE; | |
5737 | ||
5738 | /* The backend may have to create some sections regardless of whether | |
5739 | we're dynamic or not. */ | |
5740 | if (bed->elf_backend_always_size_sections | |
5741 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5742 | return FALSE; | |
5743 | ||
5744 | /* Determine any GNU_STACK segment requirements, after the backend | |
5745 | has had a chance to set a default segment size. */ | |
5a580b3a | 5746 | if (info->execstack) |
12bd6957 | 5747 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; |
5a580b3a | 5748 | else if (info->noexecstack) |
12bd6957 | 5749 | elf_stack_flags (output_bfd) = PF_R | PF_W; |
5a580b3a AM |
5750 | else |
5751 | { | |
5752 | bfd *inputobj; | |
5753 | asection *notesec = NULL; | |
5754 | int exec = 0; | |
5755 | ||
5756 | for (inputobj = info->input_bfds; | |
5757 | inputobj; | |
c72f2fb2 | 5758 | inputobj = inputobj->link.next) |
5a580b3a AM |
5759 | { |
5760 | asection *s; | |
5761 | ||
a92c088a L |
5762 | if (inputobj->flags |
5763 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
5a580b3a AM |
5764 | continue; |
5765 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5766 | if (s) | |
5767 | { | |
5768 | if (s->flags & SEC_CODE) | |
5769 | exec = PF_X; | |
5770 | notesec = s; | |
5771 | } | |
6bfdb61b | 5772 | else if (bed->default_execstack) |
5a580b3a AM |
5773 | exec = PF_X; |
5774 | } | |
04c3a755 | 5775 | if (notesec || info->stacksize > 0) |
12bd6957 | 5776 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; |
0e1862bb | 5777 | if (notesec && exec && bfd_link_relocatable (info) |
04c3a755 NS |
5778 | && notesec->output_section != bfd_abs_section_ptr) |
5779 | notesec->output_section->flags |= SEC_CODE; | |
5a580b3a AM |
5780 | } |
5781 | ||
5a580b3a AM |
5782 | dynobj = elf_hash_table (info)->dynobj; |
5783 | ||
9a2a56cc | 5784 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a AM |
5785 | { |
5786 | struct elf_info_failed eif; | |
5787 | struct elf_link_hash_entry *h; | |
5788 | asection *dynstr; | |
5789 | struct bfd_elf_version_tree *t; | |
5790 | struct bfd_elf_version_expr *d; | |
046183de | 5791 | asection *s; |
5a580b3a AM |
5792 | bfd_boolean all_defined; |
5793 | ||
3d4d4302 | 5794 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); |
9b8b325a | 5795 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); |
5a580b3a AM |
5796 | |
5797 | if (soname != NULL) | |
5798 | { | |
5799 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5800 | soname, TRUE); | |
5801 | if (soname_indx == (bfd_size_type) -1 | |
5802 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
5803 | return FALSE; | |
5804 | } | |
5805 | ||
5806 | if (info->symbolic) | |
5807 | { | |
5808 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5809 | return FALSE; | |
5810 | info->flags |= DF_SYMBOLIC; | |
5811 | } | |
5812 | ||
5813 | if (rpath != NULL) | |
5814 | { | |
5815 | bfd_size_type indx; | |
b1b00fcc | 5816 | bfd_vma tag; |
5a580b3a AM |
5817 | |
5818 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
5819 | TRUE); | |
b1b00fcc | 5820 | if (indx == (bfd_size_type) -1) |
5a580b3a AM |
5821 | return FALSE; |
5822 | ||
b1b00fcc MF |
5823 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; |
5824 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
5825 | return FALSE; | |
5a580b3a AM |
5826 | } |
5827 | ||
5828 | if (filter_shlib != NULL) | |
5829 | { | |
5830 | bfd_size_type indx; | |
5831 | ||
5832 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5833 | filter_shlib, TRUE); | |
5834 | if (indx == (bfd_size_type) -1 | |
5835 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
5836 | return FALSE; | |
5837 | } | |
5838 | ||
5839 | if (auxiliary_filters != NULL) | |
5840 | { | |
5841 | const char * const *p; | |
5842 | ||
5843 | for (p = auxiliary_filters; *p != NULL; p++) | |
5844 | { | |
5845 | bfd_size_type indx; | |
5846 | ||
5847 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5848 | *p, TRUE); | |
5849 | if (indx == (bfd_size_type) -1 | |
5850 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
5851 | return FALSE; | |
5852 | } | |
5853 | } | |
5854 | ||
7ee314fa AM |
5855 | if (audit != NULL) |
5856 | { | |
5857 | bfd_size_type indx; | |
5858 | ||
5859 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
5860 | TRUE); | |
5861 | if (indx == (bfd_size_type) -1 | |
5862 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
5863 | return FALSE; | |
5864 | } | |
5865 | ||
5866 | if (depaudit != NULL) | |
5867 | { | |
5868 | bfd_size_type indx; | |
5869 | ||
5870 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
5871 | TRUE); | |
5872 | if (indx == (bfd_size_type) -1 | |
5873 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
5874 | return FALSE; | |
5875 | } | |
5876 | ||
5a580b3a | 5877 | eif.info = info; |
5a580b3a AM |
5878 | eif.failed = FALSE; |
5879 | ||
5880 | /* If we are supposed to export all symbols into the dynamic symbol | |
5881 | table (this is not the normal case), then do so. */ | |
55255dae | 5882 | if (info->export_dynamic |
0e1862bb | 5883 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a AM |
5884 | { |
5885 | elf_link_hash_traverse (elf_hash_table (info), | |
5886 | _bfd_elf_export_symbol, | |
5887 | &eif); | |
5888 | if (eif.failed) | |
5889 | return FALSE; | |
5890 | } | |
5891 | ||
5892 | /* Make all global versions with definition. */ | |
fd91d419 | 5893 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5894 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5895 | if (!d->symver && d->literal) |
5a580b3a AM |
5896 | { |
5897 | const char *verstr, *name; | |
5898 | size_t namelen, verlen, newlen; | |
93252b1c | 5899 | char *newname, *p, leading_char; |
5a580b3a AM |
5900 | struct elf_link_hash_entry *newh; |
5901 | ||
93252b1c | 5902 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 5903 | name = d->pattern; |
93252b1c | 5904 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
5905 | verstr = t->name; |
5906 | verlen = strlen (verstr); | |
5907 | newlen = namelen + verlen + 3; | |
5908 | ||
a50b1753 | 5909 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
5910 | if (newname == NULL) |
5911 | return FALSE; | |
93252b1c MF |
5912 | newname[0] = leading_char; |
5913 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
5914 | |
5915 | /* Check the hidden versioned definition. */ | |
5916 | p = newname + namelen; | |
5917 | *p++ = ELF_VER_CHR; | |
5918 | memcpy (p, verstr, verlen + 1); | |
5919 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5920 | newname, FALSE, FALSE, | |
5921 | FALSE); | |
5922 | if (newh == NULL | |
5923 | || (newh->root.type != bfd_link_hash_defined | |
5924 | && newh->root.type != bfd_link_hash_defweak)) | |
5925 | { | |
5926 | /* Check the default versioned definition. */ | |
5927 | *p++ = ELF_VER_CHR; | |
5928 | memcpy (p, verstr, verlen + 1); | |
5929 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5930 | newname, FALSE, FALSE, | |
5931 | FALSE); | |
5932 | } | |
5933 | free (newname); | |
5934 | ||
5935 | /* Mark this version if there is a definition and it is | |
5936 | not defined in a shared object. */ | |
5937 | if (newh != NULL | |
f5385ebf | 5938 | && !newh->def_dynamic |
5a580b3a AM |
5939 | && (newh->root.type == bfd_link_hash_defined |
5940 | || newh->root.type == bfd_link_hash_defweak)) | |
5941 | d->symver = 1; | |
5942 | } | |
5943 | ||
5944 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 5945 | asvinfo.info = info; |
5a580b3a AM |
5946 | asvinfo.failed = FALSE; |
5947 | ||
5948 | elf_link_hash_traverse (elf_hash_table (info), | |
5949 | _bfd_elf_link_assign_sym_version, | |
5950 | &asvinfo); | |
5951 | if (asvinfo.failed) | |
5952 | return FALSE; | |
5953 | ||
5954 | if (!info->allow_undefined_version) | |
5955 | { | |
5956 | /* Check if all global versions have a definition. */ | |
5957 | all_defined = TRUE; | |
fd91d419 | 5958 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5959 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5960 | if (d->literal && !d->symver && !d->script) |
5a580b3a AM |
5961 | { |
5962 | (*_bfd_error_handler) | |
5963 | (_("%s: undefined version: %s"), | |
5964 | d->pattern, t->name); | |
5965 | all_defined = FALSE; | |
5966 | } | |
5967 | ||
5968 | if (!all_defined) | |
5969 | { | |
5970 | bfd_set_error (bfd_error_bad_value); | |
5971 | return FALSE; | |
5972 | } | |
5973 | } | |
5974 | ||
5975 | /* Find all symbols which were defined in a dynamic object and make | |
5976 | the backend pick a reasonable value for them. */ | |
5977 | elf_link_hash_traverse (elf_hash_table (info), | |
5978 | _bfd_elf_adjust_dynamic_symbol, | |
5979 | &eif); | |
5980 | if (eif.failed) | |
5981 | return FALSE; | |
5982 | ||
5983 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 5984 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
5985 | now so that we know the final size of the .dynamic section. */ |
5986 | ||
5987 | /* If there are initialization and/or finalization functions to | |
5988 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
5989 | h = (info->init_function | |
5990 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5991 | info->init_function, FALSE, | |
5992 | FALSE, FALSE) | |
5993 | : NULL); | |
5994 | if (h != NULL | |
f5385ebf AM |
5995 | && (h->ref_regular |
5996 | || h->def_regular)) | |
5a580b3a AM |
5997 | { |
5998 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
5999 | return FALSE; | |
6000 | } | |
6001 | h = (info->fini_function | |
6002 | ? elf_link_hash_lookup (elf_hash_table (info), | |
6003 | info->fini_function, FALSE, | |
6004 | FALSE, FALSE) | |
6005 | : NULL); | |
6006 | if (h != NULL | |
f5385ebf AM |
6007 | && (h->ref_regular |
6008 | || h->def_regular)) | |
5a580b3a AM |
6009 | { |
6010 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
6011 | return FALSE; | |
6012 | } | |
6013 | ||
046183de AM |
6014 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
6015 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6016 | { |
6017 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
0e1862bb | 6018 | if (! bfd_link_executable (info)) |
5a580b3a AM |
6019 | { |
6020 | bfd *sub; | |
6021 | asection *o; | |
6022 | ||
6023 | for (sub = info->input_bfds; sub != NULL; | |
c72f2fb2 | 6024 | sub = sub->link.next) |
3fcd97f1 JJ |
6025 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
6026 | for (o = sub->sections; o != NULL; o = o->next) | |
6027 | if (elf_section_data (o)->this_hdr.sh_type | |
6028 | == SHT_PREINIT_ARRAY) | |
6029 | { | |
6030 | (*_bfd_error_handler) | |
6031 | (_("%B: .preinit_array section is not allowed in DSO"), | |
6032 | sub); | |
6033 | break; | |
6034 | } | |
5a580b3a AM |
6035 | |
6036 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6037 | return FALSE; | |
6038 | } | |
6039 | ||
6040 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
6041 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
6042 | return FALSE; | |
6043 | } | |
046183de AM |
6044 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
6045 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6046 | { |
6047 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
6048 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
6049 | return FALSE; | |
6050 | } | |
046183de AM |
6051 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
6052 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6053 | { |
6054 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
6055 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
6056 | return FALSE; | |
6057 | } | |
6058 | ||
3d4d4302 | 6059 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6060 | /* If .dynstr is excluded from the link, we don't want any of |
6061 | these tags. Strictly, we should be checking each section | |
6062 | individually; This quick check covers for the case where | |
6063 | someone does a /DISCARD/ : { *(*) }. */ | |
6064 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
6065 | { | |
6066 | bfd_size_type strsize; | |
6067 | ||
6068 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
6069 | if ((info->emit_hash |
6070 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
6071 | || (info->emit_gnu_hash | |
6072 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
6073 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
6074 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
6075 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
6076 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6077 | bed->s->sizeof_sym)) | |
6078 | return FALSE; | |
6079 | } | |
6080 | } | |
6081 | ||
de231f20 CM |
6082 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
6083 | return FALSE; | |
6084 | ||
5a580b3a AM |
6085 | /* The backend must work out the sizes of all the other dynamic |
6086 | sections. */ | |
9a2a56cc AM |
6087 | if (dynobj != NULL |
6088 | && bed->elf_backend_size_dynamic_sections != NULL | |
5a580b3a AM |
6089 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
6090 | return FALSE; | |
6091 | ||
9a2a56cc | 6092 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6093 | { |
554220db | 6094 | unsigned long section_sym_count; |
fd91d419 | 6095 | struct bfd_elf_version_tree *verdefs; |
5a580b3a | 6096 | asection *s; |
5a580b3a AM |
6097 | |
6098 | /* Set up the version definition section. */ | |
3d4d4302 | 6099 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
6100 | BFD_ASSERT (s != NULL); |
6101 | ||
6102 | /* We may have created additional version definitions if we are | |
6103 | just linking a regular application. */ | |
fd91d419 | 6104 | verdefs = info->version_info; |
5a580b3a AM |
6105 | |
6106 | /* Skip anonymous version tag. */ | |
6107 | if (verdefs != NULL && verdefs->vernum == 0) | |
6108 | verdefs = verdefs->next; | |
6109 | ||
3e3b46e5 | 6110 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 6111 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6112 | else |
6113 | { | |
6114 | unsigned int cdefs; | |
6115 | bfd_size_type size; | |
6116 | struct bfd_elf_version_tree *t; | |
6117 | bfd_byte *p; | |
6118 | Elf_Internal_Verdef def; | |
6119 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
6120 | struct bfd_link_hash_entry *bh; |
6121 | struct elf_link_hash_entry *h; | |
6122 | const char *name; | |
5a580b3a AM |
6123 | |
6124 | cdefs = 0; | |
6125 | size = 0; | |
6126 | ||
6127 | /* Make space for the base version. */ | |
6128 | size += sizeof (Elf_External_Verdef); | |
6129 | size += sizeof (Elf_External_Verdaux); | |
6130 | ++cdefs; | |
6131 | ||
3e3b46e5 PB |
6132 | /* Make space for the default version. */ |
6133 | if (info->create_default_symver) | |
6134 | { | |
6135 | size += sizeof (Elf_External_Verdef); | |
6136 | ++cdefs; | |
6137 | } | |
6138 | ||
5a580b3a AM |
6139 | for (t = verdefs; t != NULL; t = t->next) |
6140 | { | |
6141 | struct bfd_elf_version_deps *n; | |
6142 | ||
a6cc6b3b RO |
6143 | /* Don't emit base version twice. */ |
6144 | if (t->vernum == 0) | |
6145 | continue; | |
6146 | ||
5a580b3a AM |
6147 | size += sizeof (Elf_External_Verdef); |
6148 | size += sizeof (Elf_External_Verdaux); | |
6149 | ++cdefs; | |
6150 | ||
6151 | for (n = t->deps; n != NULL; n = n->next) | |
6152 | size += sizeof (Elf_External_Verdaux); | |
6153 | } | |
6154 | ||
eea6121a | 6155 | s->size = size; |
a50b1753 | 6156 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6157 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6158 | return FALSE; |
6159 | ||
6160 | /* Fill in the version definition section. */ | |
6161 | ||
6162 | p = s->contents; | |
6163 | ||
6164 | def.vd_version = VER_DEF_CURRENT; | |
6165 | def.vd_flags = VER_FLG_BASE; | |
6166 | def.vd_ndx = 1; | |
6167 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6168 | if (info->create_default_symver) |
6169 | { | |
6170 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6171 | def.vd_next = sizeof (Elf_External_Verdef); | |
6172 | } | |
6173 | else | |
6174 | { | |
6175 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6176 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6177 | + sizeof (Elf_External_Verdaux)); | |
6178 | } | |
5a580b3a AM |
6179 | |
6180 | if (soname_indx != (bfd_size_type) -1) | |
6181 | { | |
6182 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6183 | soname_indx); | |
6184 | def.vd_hash = bfd_elf_hash (soname); | |
6185 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6186 | name = soname; |
5a580b3a AM |
6187 | } |
6188 | else | |
6189 | { | |
5a580b3a AM |
6190 | bfd_size_type indx; |
6191 | ||
06084812 | 6192 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6193 | def.vd_hash = bfd_elf_hash (name); |
6194 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6195 | name, FALSE); | |
6196 | if (indx == (bfd_size_type) -1) | |
6197 | return FALSE; | |
6198 | defaux.vda_name = indx; | |
6199 | } | |
6200 | defaux.vda_next = 0; | |
6201 | ||
6202 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6203 | (Elf_External_Verdef *) p); | |
6204 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6205 | if (info->create_default_symver) |
6206 | { | |
6207 | /* Add a symbol representing this version. */ | |
6208 | bh = NULL; | |
6209 | if (! (_bfd_generic_link_add_one_symbol | |
6210 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6211 | 0, NULL, FALSE, | |
6212 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6213 | return FALSE; | |
6214 | h = (struct elf_link_hash_entry *) bh; | |
6215 | h->non_elf = 0; | |
6216 | h->def_regular = 1; | |
6217 | h->type = STT_OBJECT; | |
6218 | h->verinfo.vertree = NULL; | |
6219 | ||
6220 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6221 | return FALSE; | |
6222 | ||
6223 | /* Create a duplicate of the base version with the same | |
6224 | aux block, but different flags. */ | |
6225 | def.vd_flags = 0; | |
6226 | def.vd_ndx = 2; | |
6227 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6228 | if (verdefs) | |
6229 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6230 | + sizeof (Elf_External_Verdaux)); | |
6231 | else | |
6232 | def.vd_next = 0; | |
6233 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6234 | (Elf_External_Verdef *) p); | |
6235 | p += sizeof (Elf_External_Verdef); | |
6236 | } | |
5a580b3a AM |
6237 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6238 | (Elf_External_Verdaux *) p); | |
6239 | p += sizeof (Elf_External_Verdaux); | |
6240 | ||
6241 | for (t = verdefs; t != NULL; t = t->next) | |
6242 | { | |
6243 | unsigned int cdeps; | |
6244 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6245 | |
a6cc6b3b RO |
6246 | /* Don't emit the base version twice. */ |
6247 | if (t->vernum == 0) | |
6248 | continue; | |
6249 | ||
5a580b3a AM |
6250 | cdeps = 0; |
6251 | for (n = t->deps; n != NULL; n = n->next) | |
6252 | ++cdeps; | |
6253 | ||
6254 | /* Add a symbol representing this version. */ | |
6255 | bh = NULL; | |
6256 | if (! (_bfd_generic_link_add_one_symbol | |
6257 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6258 | 0, NULL, FALSE, | |
6259 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6260 | return FALSE; | |
6261 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6262 | h->non_elf = 0; |
6263 | h->def_regular = 1; | |
5a580b3a AM |
6264 | h->type = STT_OBJECT; |
6265 | h->verinfo.vertree = t; | |
6266 | ||
c152c796 | 6267 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6268 | return FALSE; |
6269 | ||
6270 | def.vd_version = VER_DEF_CURRENT; | |
6271 | def.vd_flags = 0; | |
6272 | if (t->globals.list == NULL | |
6273 | && t->locals.list == NULL | |
6274 | && ! t->used) | |
6275 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6276 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6277 | def.vd_cnt = cdeps + 1; |
6278 | def.vd_hash = bfd_elf_hash (t->name); | |
6279 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6280 | def.vd_next = 0; | |
a6cc6b3b RO |
6281 | |
6282 | /* If a basever node is next, it *must* be the last node in | |
6283 | the chain, otherwise Verdef construction breaks. */ | |
6284 | if (t->next != NULL && t->next->vernum == 0) | |
6285 | BFD_ASSERT (t->next->next == NULL); | |
6286 | ||
6287 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6288 | def.vd_next = (sizeof (Elf_External_Verdef) |
6289 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6290 | ||
6291 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6292 | (Elf_External_Verdef *) p); | |
6293 | p += sizeof (Elf_External_Verdef); | |
6294 | ||
6295 | defaux.vda_name = h->dynstr_index; | |
6296 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6297 | h->dynstr_index); | |
6298 | defaux.vda_next = 0; | |
6299 | if (t->deps != NULL) | |
6300 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6301 | t->name_indx = defaux.vda_name; | |
6302 | ||
6303 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6304 | (Elf_External_Verdaux *) p); | |
6305 | p += sizeof (Elf_External_Verdaux); | |
6306 | ||
6307 | for (n = t->deps; n != NULL; n = n->next) | |
6308 | { | |
6309 | if (n->version_needed == NULL) | |
6310 | { | |
6311 | /* This can happen if there was an error in the | |
6312 | version script. */ | |
6313 | defaux.vda_name = 0; | |
6314 | } | |
6315 | else | |
6316 | { | |
6317 | defaux.vda_name = n->version_needed->name_indx; | |
6318 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6319 | defaux.vda_name); | |
6320 | } | |
6321 | if (n->next == NULL) | |
6322 | defaux.vda_next = 0; | |
6323 | else | |
6324 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6325 | ||
6326 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6327 | (Elf_External_Verdaux *) p); | |
6328 | p += sizeof (Elf_External_Verdaux); | |
6329 | } | |
6330 | } | |
6331 | ||
6332 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6333 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6334 | return FALSE; | |
6335 | ||
6336 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6337 | } | |
6338 | ||
6339 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6340 | { | |
6341 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6342 | return FALSE; | |
6343 | } | |
6344 | else if (info->flags & DF_BIND_NOW) | |
6345 | { | |
6346 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6347 | return FALSE; | |
6348 | } | |
6349 | ||
6350 | if (info->flags_1) | |
6351 | { | |
0e1862bb | 6352 | if (bfd_link_executable (info)) |
5a580b3a AM |
6353 | info->flags_1 &= ~ (DF_1_INITFIRST |
6354 | | DF_1_NODELETE | |
6355 | | DF_1_NOOPEN); | |
6356 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6357 | return FALSE; | |
6358 | } | |
6359 | ||
6360 | /* Work out the size of the version reference section. */ | |
6361 | ||
3d4d4302 | 6362 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
6363 | BFD_ASSERT (s != NULL); |
6364 | { | |
6365 | struct elf_find_verdep_info sinfo; | |
6366 | ||
5a580b3a AM |
6367 | sinfo.info = info; |
6368 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6369 | if (sinfo.vers == 0) | |
6370 | sinfo.vers = 1; | |
6371 | sinfo.failed = FALSE; | |
6372 | ||
6373 | elf_link_hash_traverse (elf_hash_table (info), | |
6374 | _bfd_elf_link_find_version_dependencies, | |
6375 | &sinfo); | |
14b1c01e AM |
6376 | if (sinfo.failed) |
6377 | return FALSE; | |
5a580b3a AM |
6378 | |
6379 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6380 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6381 | else |
6382 | { | |
6383 | Elf_Internal_Verneed *t; | |
6384 | unsigned int size; | |
6385 | unsigned int crefs; | |
6386 | bfd_byte *p; | |
6387 | ||
a6cc6b3b | 6388 | /* Build the version dependency section. */ |
5a580b3a AM |
6389 | size = 0; |
6390 | crefs = 0; | |
6391 | for (t = elf_tdata (output_bfd)->verref; | |
6392 | t != NULL; | |
6393 | t = t->vn_nextref) | |
6394 | { | |
6395 | Elf_Internal_Vernaux *a; | |
6396 | ||
6397 | size += sizeof (Elf_External_Verneed); | |
6398 | ++crefs; | |
6399 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6400 | size += sizeof (Elf_External_Vernaux); | |
6401 | } | |
6402 | ||
eea6121a | 6403 | s->size = size; |
a50b1753 | 6404 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6405 | if (s->contents == NULL) |
6406 | return FALSE; | |
6407 | ||
6408 | p = s->contents; | |
6409 | for (t = elf_tdata (output_bfd)->verref; | |
6410 | t != NULL; | |
6411 | t = t->vn_nextref) | |
6412 | { | |
6413 | unsigned int caux; | |
6414 | Elf_Internal_Vernaux *a; | |
6415 | bfd_size_type indx; | |
6416 | ||
6417 | caux = 0; | |
6418 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6419 | ++caux; | |
6420 | ||
6421 | t->vn_version = VER_NEED_CURRENT; | |
6422 | t->vn_cnt = caux; | |
6423 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6424 | elf_dt_name (t->vn_bfd) != NULL | |
6425 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6426 | : lbasename (t->vn_bfd->filename), |
5a580b3a AM |
6427 | FALSE); |
6428 | if (indx == (bfd_size_type) -1) | |
6429 | return FALSE; | |
6430 | t->vn_file = indx; | |
6431 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6432 | if (t->vn_nextref == NULL) | |
6433 | t->vn_next = 0; | |
6434 | else | |
6435 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6436 | + caux * sizeof (Elf_External_Vernaux)); | |
6437 | ||
6438 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6439 | (Elf_External_Verneed *) p); | |
6440 | p += sizeof (Elf_External_Verneed); | |
6441 | ||
6442 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6443 | { | |
6444 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6445 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6446 | a->vna_nodename, FALSE); | |
6447 | if (indx == (bfd_size_type) -1) | |
6448 | return FALSE; | |
6449 | a->vna_name = indx; | |
6450 | if (a->vna_nextptr == NULL) | |
6451 | a->vna_next = 0; | |
6452 | else | |
6453 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6454 | ||
6455 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6456 | (Elf_External_Vernaux *) p); | |
6457 | p += sizeof (Elf_External_Vernaux); | |
6458 | } | |
6459 | } | |
6460 | ||
6461 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6462 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6463 | return FALSE; | |
6464 | ||
6465 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6466 | } | |
6467 | } | |
6468 | ||
8423293d AM |
6469 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6470 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6471 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6472 | §ion_sym_count) == 0) | |
6473 | { | |
3d4d4302 | 6474 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
6475 | s->flags |= SEC_EXCLUDE; |
6476 | } | |
6477 | } | |
6478 | return TRUE; | |
6479 | } | |
6480 | ||
74541ad4 AM |
6481 | /* Find the first non-excluded output section. We'll use its |
6482 | section symbol for some emitted relocs. */ | |
6483 | void | |
6484 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6485 | { | |
6486 | asection *s; | |
6487 | ||
6488 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6489 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6490 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6491 | { | |
6492 | elf_hash_table (info)->text_index_section = s; | |
6493 | break; | |
6494 | } | |
6495 | } | |
6496 | ||
6497 | /* Find two non-excluded output sections, one for code, one for data. | |
6498 | We'll use their section symbols for some emitted relocs. */ | |
6499 | void | |
6500 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6501 | { | |
6502 | asection *s; | |
6503 | ||
266b05cf DJ |
6504 | /* Data first, since setting text_index_section changes |
6505 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6506 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6507 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6508 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6509 | { | |
266b05cf | 6510 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6511 | break; |
6512 | } | |
6513 | ||
6514 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6515 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6516 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6517 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6518 | { | |
266b05cf | 6519 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6520 | break; |
6521 | } | |
6522 | ||
6523 | if (elf_hash_table (info)->text_index_section == NULL) | |
6524 | elf_hash_table (info)->text_index_section | |
6525 | = elf_hash_table (info)->data_index_section; | |
6526 | } | |
6527 | ||
8423293d AM |
6528 | bfd_boolean |
6529 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6530 | { | |
74541ad4 AM |
6531 | const struct elf_backend_data *bed; |
6532 | ||
8423293d AM |
6533 | if (!is_elf_hash_table (info->hash)) |
6534 | return TRUE; | |
6535 | ||
74541ad4 AM |
6536 | bed = get_elf_backend_data (output_bfd); |
6537 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6538 | ||
8423293d AM |
6539 | if (elf_hash_table (info)->dynamic_sections_created) |
6540 | { | |
6541 | bfd *dynobj; | |
8423293d AM |
6542 | asection *s; |
6543 | bfd_size_type dynsymcount; | |
6544 | unsigned long section_sym_count; | |
8423293d AM |
6545 | unsigned int dtagcount; |
6546 | ||
6547 | dynobj = elf_hash_table (info)->dynobj; | |
6548 | ||
5a580b3a AM |
6549 | /* Assign dynsym indicies. In a shared library we generate a |
6550 | section symbol for each output section, which come first. | |
6551 | Next come all of the back-end allocated local dynamic syms, | |
6552 | followed by the rest of the global symbols. */ | |
6553 | ||
554220db AM |
6554 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6555 | §ion_sym_count); | |
5a580b3a AM |
6556 | |
6557 | /* Work out the size of the symbol version section. */ | |
3d4d4302 | 6558 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 6559 | BFD_ASSERT (s != NULL); |
8423293d AM |
6560 | if (dynsymcount != 0 |
6561 | && (s->flags & SEC_EXCLUDE) == 0) | |
5a580b3a | 6562 | { |
eea6121a | 6563 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6564 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6565 | if (s->contents == NULL) |
6566 | return FALSE; | |
6567 | ||
6568 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6569 | return FALSE; | |
6570 | } | |
6571 | ||
6572 | /* Set the size of the .dynsym and .hash sections. We counted | |
6573 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6574 | We will build the contents of .dynsym and .hash when we build | |
6575 | the final symbol table, because until then we do not know the | |
6576 | correct value to give the symbols. We built the .dynstr | |
6577 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 6578 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 6579 | BFD_ASSERT (s != NULL); |
eea6121a | 6580 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a AM |
6581 | |
6582 | if (dynsymcount != 0) | |
6583 | { | |
a50b1753 | 6584 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
554220db AM |
6585 | if (s->contents == NULL) |
6586 | return FALSE; | |
5a580b3a | 6587 | |
554220db AM |
6588 | /* The first entry in .dynsym is a dummy symbol. |
6589 | Clear all the section syms, in case we don't output them all. */ | |
6590 | ++section_sym_count; | |
6591 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a AM |
6592 | } |
6593 | ||
fdc90cb4 JJ |
6594 | elf_hash_table (info)->bucketcount = 0; |
6595 | ||
5a580b3a AM |
6596 | /* Compute the size of the hashing table. As a side effect this |
6597 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6598 | if (info->emit_hash) |
6599 | { | |
6600 | unsigned long int *hashcodes; | |
14b1c01e | 6601 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6602 | bfd_size_type amt; |
6603 | unsigned long int nsyms; | |
6604 | size_t bucketcount; | |
6605 | size_t hash_entry_size; | |
6606 | ||
6607 | /* Compute the hash values for all exported symbols. At the same | |
6608 | time store the values in an array so that we could use them for | |
6609 | optimizations. */ | |
6610 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6611 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6612 | if (hashcodes == NULL) |
6613 | return FALSE; | |
14b1c01e AM |
6614 | hashinf.hashcodes = hashcodes; |
6615 | hashinf.error = FALSE; | |
5a580b3a | 6616 | |
fdc90cb4 JJ |
6617 | /* Put all hash values in HASHCODES. */ |
6618 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6619 | elf_collect_hash_codes, &hashinf); |
6620 | if (hashinf.error) | |
4dd07732 AM |
6621 | { |
6622 | free (hashcodes); | |
6623 | return FALSE; | |
6624 | } | |
5a580b3a | 6625 | |
14b1c01e | 6626 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6627 | bucketcount |
6628 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6629 | free (hashcodes); | |
6630 | ||
6631 | if (bucketcount == 0) | |
6632 | return FALSE; | |
5a580b3a | 6633 | |
fdc90cb4 JJ |
6634 | elf_hash_table (info)->bucketcount = bucketcount; |
6635 | ||
3d4d4302 | 6636 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
6637 | BFD_ASSERT (s != NULL); |
6638 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6639 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6640 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6641 | if (s->contents == NULL) |
6642 | return FALSE; | |
6643 | ||
6644 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6645 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6646 | s->contents + hash_entry_size); | |
6647 | } | |
6648 | ||
6649 | if (info->emit_gnu_hash) | |
6650 | { | |
6651 | size_t i, cnt; | |
6652 | unsigned char *contents; | |
6653 | struct collect_gnu_hash_codes cinfo; | |
6654 | bfd_size_type amt; | |
6655 | size_t bucketcount; | |
6656 | ||
6657 | memset (&cinfo, 0, sizeof (cinfo)); | |
6658 | ||
6659 | /* Compute the hash values for all exported symbols. At the same | |
6660 | time store the values in an array so that we could use them for | |
6661 | optimizations. */ | |
6662 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6663 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6664 | if (cinfo.hashcodes == NULL) |
6665 | return FALSE; | |
6666 | ||
6667 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6668 | cinfo.min_dynindx = -1; | |
6669 | cinfo.output_bfd = output_bfd; | |
6670 | cinfo.bed = bed; | |
6671 | ||
6672 | /* Put all hash values in HASHCODES. */ | |
6673 | elf_link_hash_traverse (elf_hash_table (info), | |
6674 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6675 | if (cinfo.error) |
4dd07732 AM |
6676 | { |
6677 | free (cinfo.hashcodes); | |
6678 | return FALSE; | |
6679 | } | |
fdc90cb4 JJ |
6680 | |
6681 | bucketcount | |
6682 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6683 | ||
6684 | if (bucketcount == 0) | |
6685 | { | |
6686 | free (cinfo.hashcodes); | |
6687 | return FALSE; | |
6688 | } | |
6689 | ||
3d4d4302 | 6690 | s = bfd_get_linker_section (dynobj, ".gnu.hash"); |
fdc90cb4 JJ |
6691 | BFD_ASSERT (s != NULL); |
6692 | ||
6693 | if (cinfo.nsyms == 0) | |
6694 | { | |
6695 | /* Empty .gnu.hash section is special. */ | |
6696 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6697 | free (cinfo.hashcodes); | |
6698 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6699 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6700 | if (contents == NULL) |
6701 | return FALSE; | |
6702 | s->contents = contents; | |
6703 | /* 1 empty bucket. */ | |
6704 | bfd_put_32 (output_bfd, 1, contents); | |
6705 | /* SYMIDX above the special symbol 0. */ | |
6706 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6707 | /* Just one word for bitmask. */ | |
6708 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6709 | /* Only hash fn bloom filter. */ | |
6710 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6711 | /* No hashes are valid - empty bitmask. */ | |
6712 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6713 | /* No hashes in the only bucket. */ | |
6714 | bfd_put_32 (output_bfd, 0, | |
6715 | contents + 16 + bed->s->arch_size / 8); | |
6716 | } | |
6717 | else | |
6718 | { | |
9e6619e2 | 6719 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6720 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6721 | |
9e6619e2 AM |
6722 | x = cinfo.nsyms; |
6723 | maskbitslog2 = 1; | |
6724 | while ((x >>= 1) != 0) | |
6725 | ++maskbitslog2; | |
fdc90cb4 JJ |
6726 | if (maskbitslog2 < 3) |
6727 | maskbitslog2 = 5; | |
6728 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6729 | maskbitslog2 = maskbitslog2 + 3; | |
6730 | else | |
6731 | maskbitslog2 = maskbitslog2 + 2; | |
6732 | if (bed->s->arch_size == 64) | |
6733 | { | |
6734 | if (maskbitslog2 == 5) | |
6735 | maskbitslog2 = 6; | |
6736 | cinfo.shift1 = 6; | |
6737 | } | |
6738 | else | |
6739 | cinfo.shift1 = 5; | |
6740 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6741 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6742 | cinfo.maskbits = 1 << maskbitslog2; |
6743 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6744 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6745 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6746 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6747 | if (cinfo.bitmask == NULL) |
6748 | { | |
6749 | free (cinfo.hashcodes); | |
6750 | return FALSE; | |
6751 | } | |
6752 | ||
a50b1753 | 6753 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6754 | cinfo.indx = cinfo.counts + bucketcount; |
6755 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6756 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6757 | ||
6758 | /* Determine how often each hash bucket is used. */ | |
6759 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6760 | for (i = 0; i < cinfo.nsyms; ++i) | |
6761 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6762 | ||
6763 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6764 | if (cinfo.counts[i] != 0) | |
6765 | { | |
6766 | cinfo.indx[i] = cnt; | |
6767 | cnt += cinfo.counts[i]; | |
6768 | } | |
6769 | BFD_ASSERT (cnt == dynsymcount); | |
6770 | cinfo.bucketcount = bucketcount; | |
6771 | cinfo.local_indx = cinfo.min_dynindx; | |
6772 | ||
6773 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6774 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6775 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6776 | if (contents == NULL) |
6777 | { | |
6778 | free (cinfo.bitmask); | |
6779 | free (cinfo.hashcodes); | |
6780 | return FALSE; | |
6781 | } | |
6782 | ||
6783 | s->contents = contents; | |
6784 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6785 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6786 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6787 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6788 | contents += 16 + cinfo.maskbits / 8; | |
6789 | ||
6790 | for (i = 0; i < bucketcount; ++i) | |
6791 | { | |
6792 | if (cinfo.counts[i] == 0) | |
6793 | bfd_put_32 (output_bfd, 0, contents); | |
6794 | else | |
6795 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6796 | contents += 4; | |
6797 | } | |
6798 | ||
6799 | cinfo.contents = contents; | |
6800 | ||
6801 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6802 | elf_link_hash_traverse (elf_hash_table (info), | |
6803 | elf_renumber_gnu_hash_syms, &cinfo); | |
6804 | ||
6805 | contents = s->contents + 16; | |
6806 | for (i = 0; i < maskwords; ++i) | |
6807 | { | |
6808 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6809 | contents); | |
6810 | contents += bed->s->arch_size / 8; | |
6811 | } | |
6812 | ||
6813 | free (cinfo.bitmask); | |
6814 | free (cinfo.hashcodes); | |
6815 | } | |
6816 | } | |
5a580b3a | 6817 | |
3d4d4302 | 6818 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6819 | BFD_ASSERT (s != NULL); |
6820 | ||
4ad4eba5 | 6821 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 6822 | |
eea6121a | 6823 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
6824 | |
6825 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
6826 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
6827 | return FALSE; | |
6828 | } | |
6829 | ||
6830 | return TRUE; | |
6831 | } | |
4d269e42 | 6832 | \f |
4d269e42 AM |
6833 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
6834 | ||
6835 | static void | |
6836 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
6837 | asection *sec) | |
6838 | { | |
dbaa2011 AM |
6839 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
6840 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
6841 | } |
6842 | ||
6843 | /* Finish SHF_MERGE section merging. */ | |
6844 | ||
6845 | bfd_boolean | |
630993ec | 6846 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
6847 | { |
6848 | bfd *ibfd; | |
6849 | asection *sec; | |
6850 | ||
6851 | if (!is_elf_hash_table (info->hash)) | |
6852 | return FALSE; | |
6853 | ||
c72f2fb2 | 6854 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
6855 | if ((ibfd->flags & DYNAMIC) == 0 |
6856 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
017e6bce AM |
6857 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] |
6858 | == get_elf_backend_data (obfd)->s->elfclass)) | |
4d269e42 AM |
6859 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
6860 | if ((sec->flags & SEC_MERGE) != 0 | |
6861 | && !bfd_is_abs_section (sec->output_section)) | |
6862 | { | |
6863 | struct bfd_elf_section_data *secdata; | |
6864 | ||
6865 | secdata = elf_section_data (sec); | |
630993ec | 6866 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
6867 | &elf_hash_table (info)->merge_info, |
6868 | sec, &secdata->sec_info)) | |
6869 | return FALSE; | |
6870 | else if (secdata->sec_info) | |
dbaa2011 | 6871 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
6872 | } |
6873 | ||
6874 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 6875 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 AM |
6876 | merge_sections_remove_hook); |
6877 | return TRUE; | |
6878 | } | |
6879 | ||
6880 | /* Create an entry in an ELF linker hash table. */ | |
6881 | ||
6882 | struct bfd_hash_entry * | |
6883 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
6884 | struct bfd_hash_table *table, | |
6885 | const char *string) | |
6886 | { | |
6887 | /* Allocate the structure if it has not already been allocated by a | |
6888 | subclass. */ | |
6889 | if (entry == NULL) | |
6890 | { | |
a50b1753 | 6891 | entry = (struct bfd_hash_entry *) |
ca4be51c | 6892 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
6893 | if (entry == NULL) |
6894 | return entry; | |
6895 | } | |
6896 | ||
6897 | /* Call the allocation method of the superclass. */ | |
6898 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
6899 | if (entry != NULL) | |
6900 | { | |
6901 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
6902 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
6903 | ||
6904 | /* Set local fields. */ | |
6905 | ret->indx = -1; | |
6906 | ret->dynindx = -1; | |
6907 | ret->got = htab->init_got_refcount; | |
6908 | ret->plt = htab->init_plt_refcount; | |
6909 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
6910 | - offsetof (struct elf_link_hash_entry, size))); | |
6911 | /* Assume that we have been called by a non-ELF symbol reader. | |
6912 | This flag is then reset by the code which reads an ELF input | |
6913 | file. This ensures that a symbol created by a non-ELF symbol | |
6914 | reader will have the flag set correctly. */ | |
6915 | ret->non_elf = 1; | |
6916 | } | |
6917 | ||
6918 | return entry; | |
6919 | } | |
6920 | ||
6921 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
6922 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
6923 | ||
6924 | void | |
6925 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
6926 | struct elf_link_hash_entry *dir, | |
6927 | struct elf_link_hash_entry *ind) | |
6928 | { | |
6929 | struct elf_link_hash_table *htab; | |
6930 | ||
6931 | /* Copy down any references that we may have already seen to the | |
6e33951e L |
6932 | symbol which just became indirect if DIR isn't a hidden versioned |
6933 | symbol. */ | |
4d269e42 | 6934 | |
422f1182 | 6935 | if (dir->versioned != versioned_hidden) |
6e33951e L |
6936 | { |
6937 | dir->ref_dynamic |= ind->ref_dynamic; | |
6938 | dir->ref_regular |= ind->ref_regular; | |
6939 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
6940 | dir->non_got_ref |= ind->non_got_ref; | |
6941 | dir->needs_plt |= ind->needs_plt; | |
6942 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
6943 | } | |
4d269e42 AM |
6944 | |
6945 | if (ind->root.type != bfd_link_hash_indirect) | |
6946 | return; | |
6947 | ||
6948 | /* Copy over the global and procedure linkage table refcount entries. | |
6949 | These may have been already set up by a check_relocs routine. */ | |
6950 | htab = elf_hash_table (info); | |
6951 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
6952 | { | |
6953 | if (dir->got.refcount < 0) | |
6954 | dir->got.refcount = 0; | |
6955 | dir->got.refcount += ind->got.refcount; | |
6956 | ind->got.refcount = htab->init_got_refcount.refcount; | |
6957 | } | |
6958 | ||
6959 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
6960 | { | |
6961 | if (dir->plt.refcount < 0) | |
6962 | dir->plt.refcount = 0; | |
6963 | dir->plt.refcount += ind->plt.refcount; | |
6964 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
6965 | } | |
6966 | ||
6967 | if (ind->dynindx != -1) | |
6968 | { | |
6969 | if (dir->dynindx != -1) | |
6970 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
6971 | dir->dynindx = ind->dynindx; | |
6972 | dir->dynstr_index = ind->dynstr_index; | |
6973 | ind->dynindx = -1; | |
6974 | ind->dynstr_index = 0; | |
6975 | } | |
6976 | } | |
6977 | ||
6978 | void | |
6979 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
6980 | struct elf_link_hash_entry *h, | |
6981 | bfd_boolean force_local) | |
6982 | { | |
3aa14d16 L |
6983 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
6984 | if (h->type != STT_GNU_IFUNC) | |
6985 | { | |
6986 | h->plt = elf_hash_table (info)->init_plt_offset; | |
6987 | h->needs_plt = 0; | |
6988 | } | |
4d269e42 AM |
6989 | if (force_local) |
6990 | { | |
6991 | h->forced_local = 1; | |
6992 | if (h->dynindx != -1) | |
6993 | { | |
6994 | h->dynindx = -1; | |
6995 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
6996 | h->dynstr_index); | |
6997 | } | |
6998 | } | |
6999 | } | |
7000 | ||
7bf52ea2 AM |
7001 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
7002 | caller. */ | |
4d269e42 AM |
7003 | |
7004 | bfd_boolean | |
7005 | _bfd_elf_link_hash_table_init | |
7006 | (struct elf_link_hash_table *table, | |
7007 | bfd *abfd, | |
7008 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
7009 | struct bfd_hash_table *, | |
7010 | const char *), | |
4dfe6ac6 NC |
7011 | unsigned int entsize, |
7012 | enum elf_target_id target_id) | |
4d269e42 AM |
7013 | { |
7014 | bfd_boolean ret; | |
7015 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
7016 | ||
4d269e42 AM |
7017 | table->init_got_refcount.refcount = can_refcount - 1; |
7018 | table->init_plt_refcount.refcount = can_refcount - 1; | |
7019 | table->init_got_offset.offset = -(bfd_vma) 1; | |
7020 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7021 | /* The first dynamic symbol is a dummy. */ | |
7022 | table->dynsymcount = 1; | |
7023 | ||
7024 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7025 | |
4d269e42 | 7026 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7027 | table->hash_table_id = target_id; |
4d269e42 AM |
7028 | |
7029 | return ret; | |
7030 | } | |
7031 | ||
7032 | /* Create an ELF linker hash table. */ | |
7033 | ||
7034 | struct bfd_link_hash_table * | |
7035 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7036 | { | |
7037 | struct elf_link_hash_table *ret; | |
7038 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
7039 | ||
7bf52ea2 | 7040 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7041 | if (ret == NULL) |
7042 | return NULL; | |
7043 | ||
7044 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7045 | sizeof (struct elf_link_hash_entry), |
7046 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7047 | { |
7048 | free (ret); | |
7049 | return NULL; | |
7050 | } | |
d495ab0d | 7051 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7052 | |
7053 | return &ret->root; | |
7054 | } | |
7055 | ||
9f7c3e5e AM |
7056 | /* Destroy an ELF linker hash table. */ |
7057 | ||
7058 | void | |
d495ab0d | 7059 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7060 | { |
d495ab0d AM |
7061 | struct elf_link_hash_table *htab; |
7062 | ||
7063 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7064 | if (htab->dynstr != NULL) |
7065 | _bfd_elf_strtab_free (htab->dynstr); | |
7066 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7067 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7068 | } |
7069 | ||
4d269e42 AM |
7070 | /* This is a hook for the ELF emulation code in the generic linker to |
7071 | tell the backend linker what file name to use for the DT_NEEDED | |
7072 | entry for a dynamic object. */ | |
7073 | ||
7074 | void | |
7075 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7076 | { | |
7077 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7078 | && bfd_get_format (abfd) == bfd_object) | |
7079 | elf_dt_name (abfd) = name; | |
7080 | } | |
7081 | ||
7082 | int | |
7083 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7084 | { | |
7085 | int lib_class; | |
7086 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7087 | && bfd_get_format (abfd) == bfd_object) | |
7088 | lib_class = elf_dyn_lib_class (abfd); | |
7089 | else | |
7090 | lib_class = 0; | |
7091 | return lib_class; | |
7092 | } | |
7093 | ||
7094 | void | |
7095 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7096 | { | |
7097 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7098 | && bfd_get_format (abfd) == bfd_object) | |
7099 | elf_dyn_lib_class (abfd) = lib_class; | |
7100 | } | |
7101 | ||
7102 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7103 | the linker ELF emulation code. */ | |
7104 | ||
7105 | struct bfd_link_needed_list * | |
7106 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7107 | struct bfd_link_info *info) | |
7108 | { | |
7109 | if (! is_elf_hash_table (info->hash)) | |
7110 | return NULL; | |
7111 | return elf_hash_table (info)->needed; | |
7112 | } | |
7113 | ||
7114 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7115 | hook for the linker ELF emulation code. */ | |
7116 | ||
7117 | struct bfd_link_needed_list * | |
7118 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7119 | struct bfd_link_info *info) | |
7120 | { | |
7121 | if (! is_elf_hash_table (info->hash)) | |
7122 | return NULL; | |
7123 | return elf_hash_table (info)->runpath; | |
7124 | } | |
7125 | ||
7126 | /* Get the name actually used for a dynamic object for a link. This | |
7127 | is the SONAME entry if there is one. Otherwise, it is the string | |
7128 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7129 | ||
7130 | const char * | |
7131 | bfd_elf_get_dt_soname (bfd *abfd) | |
7132 | { | |
7133 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7134 | && bfd_get_format (abfd) == bfd_object) | |
7135 | return elf_dt_name (abfd); | |
7136 | return NULL; | |
7137 | } | |
7138 | ||
7139 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7140 | the ELF linker emulation code. */ | |
7141 | ||
7142 | bfd_boolean | |
7143 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
7144 | struct bfd_link_needed_list **pneeded) | |
7145 | { | |
7146 | asection *s; | |
7147 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7148 | unsigned int elfsec; |
4d269e42 AM |
7149 | unsigned long shlink; |
7150 | bfd_byte *extdyn, *extdynend; | |
7151 | size_t extdynsize; | |
7152 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7153 | ||
7154 | *pneeded = NULL; | |
7155 | ||
7156 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7157 | || bfd_get_format (abfd) != bfd_object) | |
7158 | return TRUE; | |
7159 | ||
7160 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7161 | if (s == NULL || s->size == 0) | |
7162 | return TRUE; | |
7163 | ||
7164 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7165 | goto error_return; | |
7166 | ||
7167 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7168 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7169 | goto error_return; |
7170 | ||
7171 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7172 | |
4d269e42 AM |
7173 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7174 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7175 | ||
7176 | extdyn = dynbuf; | |
7177 | extdynend = extdyn + s->size; | |
7178 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7179 | { | |
7180 | Elf_Internal_Dyn dyn; | |
7181 | ||
7182 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7183 | ||
7184 | if (dyn.d_tag == DT_NULL) | |
7185 | break; | |
7186 | ||
7187 | if (dyn.d_tag == DT_NEEDED) | |
7188 | { | |
7189 | const char *string; | |
7190 | struct bfd_link_needed_list *l; | |
7191 | unsigned int tagv = dyn.d_un.d_val; | |
7192 | bfd_size_type amt; | |
7193 | ||
7194 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7195 | if (string == NULL) | |
7196 | goto error_return; | |
7197 | ||
7198 | amt = sizeof *l; | |
a50b1753 | 7199 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7200 | if (l == NULL) |
7201 | goto error_return; | |
7202 | ||
7203 | l->by = abfd; | |
7204 | l->name = string; | |
7205 | l->next = *pneeded; | |
7206 | *pneeded = l; | |
7207 | } | |
7208 | } | |
7209 | ||
7210 | free (dynbuf); | |
7211 | ||
7212 | return TRUE; | |
7213 | ||
7214 | error_return: | |
7215 | if (dynbuf != NULL) | |
7216 | free (dynbuf); | |
7217 | return FALSE; | |
7218 | } | |
7219 | ||
7220 | struct elf_symbuf_symbol | |
7221 | { | |
7222 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7223 | unsigned char st_info; /* Type and binding attributes */ | |
7224 | unsigned char st_other; /* Visibilty, and target specific */ | |
7225 | }; | |
7226 | ||
7227 | struct elf_symbuf_head | |
7228 | { | |
7229 | struct elf_symbuf_symbol *ssym; | |
7230 | bfd_size_type count; | |
7231 | unsigned int st_shndx; | |
7232 | }; | |
7233 | ||
7234 | struct elf_symbol | |
7235 | { | |
7236 | union | |
7237 | { | |
7238 | Elf_Internal_Sym *isym; | |
7239 | struct elf_symbuf_symbol *ssym; | |
7240 | } u; | |
7241 | const char *name; | |
7242 | }; | |
7243 | ||
7244 | /* Sort references to symbols by ascending section number. */ | |
7245 | ||
7246 | static int | |
7247 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7248 | { | |
7249 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7250 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7251 | ||
7252 | return s1->st_shndx - s2->st_shndx; | |
7253 | } | |
7254 | ||
7255 | static int | |
7256 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7257 | { | |
7258 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7259 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7260 | return strcmp (s1->name, s2->name); | |
7261 | } | |
7262 | ||
7263 | static struct elf_symbuf_head * | |
7264 | elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf) | |
7265 | { | |
14b1c01e | 7266 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7267 | struct elf_symbuf_symbol *ssym; |
7268 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
3ae181ee | 7269 | bfd_size_type i, shndx_count, total_size; |
4d269e42 | 7270 | |
a50b1753 | 7271 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7272 | if (indbuf == NULL) |
7273 | return NULL; | |
7274 | ||
7275 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7276 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7277 | *ind++ = &isymbuf[i]; | |
7278 | indbufend = ind; | |
7279 | ||
7280 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7281 | elf_sort_elf_symbol); | |
7282 | ||
7283 | shndx_count = 0; | |
7284 | if (indbufend > indbuf) | |
7285 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7286 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7287 | shndx_count++; | |
7288 | ||
3ae181ee L |
7289 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7290 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7291 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7292 | if (ssymbuf == NULL) |
7293 | { | |
7294 | free (indbuf); | |
7295 | return NULL; | |
7296 | } | |
7297 | ||
3ae181ee | 7298 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7299 | ssymbuf->ssym = NULL; |
7300 | ssymbuf->count = shndx_count; | |
7301 | ssymbuf->st_shndx = 0; | |
7302 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7303 | { | |
7304 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7305 | { | |
7306 | ssymhead++; | |
7307 | ssymhead->ssym = ssym; | |
7308 | ssymhead->count = 0; | |
7309 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7310 | } | |
7311 | ssym->st_name = (*ind)->st_name; | |
7312 | ssym->st_info = (*ind)->st_info; | |
7313 | ssym->st_other = (*ind)->st_other; | |
7314 | ssymhead->count++; | |
7315 | } | |
3ae181ee L |
7316 | BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count |
7317 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) | |
7318 | == total_size)); | |
4d269e42 AM |
7319 | |
7320 | free (indbuf); | |
7321 | return ssymbuf; | |
7322 | } | |
7323 | ||
7324 | /* Check if 2 sections define the same set of local and global | |
7325 | symbols. */ | |
7326 | ||
8f317e31 | 7327 | static bfd_boolean |
4d269e42 AM |
7328 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7329 | struct bfd_link_info *info) | |
7330 | { | |
7331 | bfd *bfd1, *bfd2; | |
7332 | const struct elf_backend_data *bed1, *bed2; | |
7333 | Elf_Internal_Shdr *hdr1, *hdr2; | |
7334 | bfd_size_type symcount1, symcount2; | |
7335 | Elf_Internal_Sym *isymbuf1, *isymbuf2; | |
7336 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7337 | Elf_Internal_Sym *isym, *isymend; | |
7338 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
7339 | bfd_size_type count1, count2, i; | |
cb33740c | 7340 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7341 | bfd_boolean result; |
7342 | ||
7343 | bfd1 = sec1->owner; | |
7344 | bfd2 = sec2->owner; | |
7345 | ||
4d269e42 AM |
7346 | /* Both sections have to be in ELF. */ |
7347 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7348 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7349 | return FALSE; | |
7350 | ||
7351 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7352 | return FALSE; | |
7353 | ||
4d269e42 AM |
7354 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7355 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7356 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7357 | return FALSE; |
7358 | ||
7359 | bed1 = get_elf_backend_data (bfd1); | |
7360 | bed2 = get_elf_backend_data (bfd2); | |
7361 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7362 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7363 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7364 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7365 | ||
7366 | if (symcount1 == 0 || symcount2 == 0) | |
7367 | return FALSE; | |
7368 | ||
7369 | result = FALSE; | |
7370 | isymbuf1 = NULL; | |
7371 | isymbuf2 = NULL; | |
a50b1753 NC |
7372 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7373 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7374 | |
7375 | if (ssymbuf1 == NULL) | |
7376 | { | |
7377 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7378 | NULL, NULL, NULL); | |
7379 | if (isymbuf1 == NULL) | |
7380 | goto done; | |
7381 | ||
7382 | if (!info->reduce_memory_overheads) | |
7383 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7384 | = elf_create_symbuf (symcount1, isymbuf1); | |
7385 | } | |
7386 | ||
7387 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7388 | { | |
7389 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7390 | NULL, NULL, NULL); | |
7391 | if (isymbuf2 == NULL) | |
7392 | goto done; | |
7393 | ||
7394 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7395 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7396 | = elf_create_symbuf (symcount2, isymbuf2); | |
7397 | } | |
7398 | ||
7399 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7400 | { | |
7401 | /* Optimized faster version. */ | |
7402 | bfd_size_type lo, hi, mid; | |
7403 | struct elf_symbol *symp; | |
7404 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7405 | ||
7406 | lo = 0; | |
7407 | hi = ssymbuf1->count; | |
7408 | ssymbuf1++; | |
7409 | count1 = 0; | |
7410 | while (lo < hi) | |
7411 | { | |
7412 | mid = (lo + hi) / 2; | |
cb33740c | 7413 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7414 | hi = mid; |
cb33740c | 7415 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7416 | lo = mid + 1; |
7417 | else | |
7418 | { | |
7419 | count1 = ssymbuf1[mid].count; | |
7420 | ssymbuf1 += mid; | |
7421 | break; | |
7422 | } | |
7423 | } | |
7424 | ||
7425 | lo = 0; | |
7426 | hi = ssymbuf2->count; | |
7427 | ssymbuf2++; | |
7428 | count2 = 0; | |
7429 | while (lo < hi) | |
7430 | { | |
7431 | mid = (lo + hi) / 2; | |
cb33740c | 7432 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7433 | hi = mid; |
cb33740c | 7434 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7435 | lo = mid + 1; |
7436 | else | |
7437 | { | |
7438 | count2 = ssymbuf2[mid].count; | |
7439 | ssymbuf2 += mid; | |
7440 | break; | |
7441 | } | |
7442 | } | |
7443 | ||
7444 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7445 | goto done; | |
7446 | ||
ca4be51c AM |
7447 | symtable1 |
7448 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
7449 | symtable2 | |
7450 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
7451 | if (symtable1 == NULL || symtable2 == NULL) |
7452 | goto done; | |
7453 | ||
7454 | symp = symtable1; | |
7455 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7456 | ssym < ssymend; ssym++, symp++) | |
7457 | { | |
7458 | symp->u.ssym = ssym; | |
7459 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7460 | hdr1->sh_link, | |
7461 | ssym->st_name); | |
7462 | } | |
7463 | ||
7464 | symp = symtable2; | |
7465 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7466 | ssym < ssymend; ssym++, symp++) | |
7467 | { | |
7468 | symp->u.ssym = ssym; | |
7469 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7470 | hdr2->sh_link, | |
7471 | ssym->st_name); | |
7472 | } | |
7473 | ||
7474 | /* Sort symbol by name. */ | |
7475 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7476 | elf_sym_name_compare); | |
7477 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7478 | elf_sym_name_compare); | |
7479 | ||
7480 | for (i = 0; i < count1; i++) | |
7481 | /* Two symbols must have the same binding, type and name. */ | |
7482 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7483 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7484 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7485 | goto done; | |
7486 | ||
7487 | result = TRUE; | |
7488 | goto done; | |
7489 | } | |
7490 | ||
a50b1753 NC |
7491 | symtable1 = (struct elf_symbol *) |
7492 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7493 | symtable2 = (struct elf_symbol *) | |
7494 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7495 | if (symtable1 == NULL || symtable2 == NULL) |
7496 | goto done; | |
7497 | ||
7498 | /* Count definitions in the section. */ | |
7499 | count1 = 0; | |
7500 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7501 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7502 | symtable1[count1++].u.isym = isym; |
7503 | ||
7504 | count2 = 0; | |
7505 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7506 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7507 | symtable2[count2++].u.isym = isym; |
7508 | ||
7509 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7510 | goto done; | |
7511 | ||
7512 | for (i = 0; i < count1; i++) | |
7513 | symtable1[i].name | |
7514 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7515 | symtable1[i].u.isym->st_name); | |
7516 | ||
7517 | for (i = 0; i < count2; i++) | |
7518 | symtable2[i].name | |
7519 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7520 | symtable2[i].u.isym->st_name); | |
7521 | ||
7522 | /* Sort symbol by name. */ | |
7523 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7524 | elf_sym_name_compare); | |
7525 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7526 | elf_sym_name_compare); | |
7527 | ||
7528 | for (i = 0; i < count1; i++) | |
7529 | /* Two symbols must have the same binding, type and name. */ | |
7530 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7531 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7532 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7533 | goto done; | |
7534 | ||
7535 | result = TRUE; | |
7536 | ||
7537 | done: | |
7538 | if (symtable1) | |
7539 | free (symtable1); | |
7540 | if (symtable2) | |
7541 | free (symtable2); | |
7542 | if (isymbuf1) | |
7543 | free (isymbuf1); | |
7544 | if (isymbuf2) | |
7545 | free (isymbuf2); | |
7546 | ||
7547 | return result; | |
7548 | } | |
7549 | ||
7550 | /* Return TRUE if 2 section types are compatible. */ | |
7551 | ||
7552 | bfd_boolean | |
7553 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7554 | bfd *bbfd, const asection *bsec) | |
7555 | { | |
7556 | if (asec == NULL | |
7557 | || bsec == NULL | |
7558 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7559 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7560 | return TRUE; | |
7561 | ||
7562 | return elf_section_type (asec) == elf_section_type (bsec); | |
7563 | } | |
7564 | \f | |
c152c796 AM |
7565 | /* Final phase of ELF linker. */ |
7566 | ||
7567 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7568 | ||
7569 | struct elf_final_link_info | |
7570 | { | |
7571 | /* General link information. */ | |
7572 | struct bfd_link_info *info; | |
7573 | /* Output BFD. */ | |
7574 | bfd *output_bfd; | |
7575 | /* Symbol string table. */ | |
ef10c3ac | 7576 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
7577 | /* .hash section. */ |
7578 | asection *hash_sec; | |
7579 | /* symbol version section (.gnu.version). */ | |
7580 | asection *symver_sec; | |
7581 | /* Buffer large enough to hold contents of any section. */ | |
7582 | bfd_byte *contents; | |
7583 | /* Buffer large enough to hold external relocs of any section. */ | |
7584 | void *external_relocs; | |
7585 | /* Buffer large enough to hold internal relocs of any section. */ | |
7586 | Elf_Internal_Rela *internal_relocs; | |
7587 | /* Buffer large enough to hold external local symbols of any input | |
7588 | BFD. */ | |
7589 | bfd_byte *external_syms; | |
7590 | /* And a buffer for symbol section indices. */ | |
7591 | Elf_External_Sym_Shndx *locsym_shndx; | |
7592 | /* Buffer large enough to hold internal local symbols of any input | |
7593 | BFD. */ | |
7594 | Elf_Internal_Sym *internal_syms; | |
7595 | /* Array large enough to hold a symbol index for each local symbol | |
7596 | of any input BFD. */ | |
7597 | long *indices; | |
7598 | /* Array large enough to hold a section pointer for each local | |
7599 | symbol of any input BFD. */ | |
7600 | asection **sections; | |
ef10c3ac | 7601 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 7602 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
7603 | /* Number of STT_FILE syms seen. */ |
7604 | size_t filesym_count; | |
c152c796 AM |
7605 | }; |
7606 | ||
7607 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7608 | ||
7609 | struct elf_outext_info | |
7610 | { | |
7611 | bfd_boolean failed; | |
7612 | bfd_boolean localsyms; | |
34a79995 | 7613 | bfd_boolean file_sym_done; |
8b127cbc | 7614 | struct elf_final_link_info *flinfo; |
c152c796 AM |
7615 | }; |
7616 | ||
d9352518 DB |
7617 | |
7618 | /* Support for evaluating a complex relocation. | |
7619 | ||
7620 | Complex relocations are generalized, self-describing relocations. The | |
7621 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7622 | relocations themselves. |
d9352518 DB |
7623 | |
7624 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7625 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7626 | information (start bit, end bit, word width, etc) into the addend. This | |
7627 | information is extracted from CGEN-generated operand tables within gas. | |
7628 | ||
7629 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7630 | internal) representing prefix-notation expressions, including but not | |
7631 | limited to those sorts of expressions normally encoded as addends in the | |
7632 | addend field. The symbol mangling format is: | |
7633 | ||
7634 | <node> := <literal> | |
7635 | | <unary-operator> ':' <node> | |
7636 | | <binary-operator> ':' <node> ':' <node> | |
7637 | ; | |
7638 | ||
7639 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7640 | | 'S' <digits=N> ':' <N character section name> | |
7641 | | '#' <hexdigits> | |
7642 | ; | |
7643 | ||
7644 | <binary-operator> := as in C | |
7645 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7646 | ||
7647 | static void | |
a0c8462f AM |
7648 | set_symbol_value (bfd *bfd_with_globals, |
7649 | Elf_Internal_Sym *isymbuf, | |
7650 | size_t locsymcount, | |
7651 | size_t symidx, | |
7652 | bfd_vma val) | |
d9352518 | 7653 | { |
8977835c AM |
7654 | struct elf_link_hash_entry **sym_hashes; |
7655 | struct elf_link_hash_entry *h; | |
7656 | size_t extsymoff = locsymcount; | |
d9352518 | 7657 | |
8977835c | 7658 | if (symidx < locsymcount) |
d9352518 | 7659 | { |
8977835c AM |
7660 | Elf_Internal_Sym *sym; |
7661 | ||
7662 | sym = isymbuf + symidx; | |
7663 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7664 | { | |
7665 | /* It is a local symbol: move it to the | |
7666 | "absolute" section and give it a value. */ | |
7667 | sym->st_shndx = SHN_ABS; | |
7668 | sym->st_value = val; | |
7669 | return; | |
7670 | } | |
7671 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7672 | extsymoff = 0; | |
d9352518 | 7673 | } |
8977835c AM |
7674 | |
7675 | /* It is a global symbol: set its link type | |
7676 | to "defined" and give it a value. */ | |
7677 | ||
7678 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7679 | h = sym_hashes [symidx - extsymoff]; | |
7680 | while (h->root.type == bfd_link_hash_indirect | |
7681 | || h->root.type == bfd_link_hash_warning) | |
7682 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7683 | h->root.type = bfd_link_hash_defined; | |
7684 | h->root.u.def.value = val; | |
7685 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7686 | } |
7687 | ||
a0c8462f AM |
7688 | static bfd_boolean |
7689 | resolve_symbol (const char *name, | |
7690 | bfd *input_bfd, | |
8b127cbc | 7691 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7692 | bfd_vma *result, |
7693 | Elf_Internal_Sym *isymbuf, | |
7694 | size_t locsymcount) | |
d9352518 | 7695 | { |
a0c8462f AM |
7696 | Elf_Internal_Sym *sym; |
7697 | struct bfd_link_hash_entry *global_entry; | |
7698 | const char *candidate = NULL; | |
7699 | Elf_Internal_Shdr *symtab_hdr; | |
7700 | size_t i; | |
7701 | ||
d9352518 DB |
7702 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7703 | ||
7704 | for (i = 0; i < locsymcount; ++ i) | |
7705 | { | |
8977835c | 7706 | sym = isymbuf + i; |
d9352518 DB |
7707 | |
7708 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7709 | continue; | |
7710 | ||
7711 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7712 | symtab_hdr->sh_link, | |
7713 | sym->st_name); | |
7714 | #ifdef DEBUG | |
0f02bbd9 AM |
7715 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7716 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7717 | #endif |
7718 | if (candidate && strcmp (candidate, name) == 0) | |
7719 | { | |
8b127cbc | 7720 | asection *sec = flinfo->sections [i]; |
d9352518 | 7721 | |
0f02bbd9 AM |
7722 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7723 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7724 | #ifdef DEBUG |
0f02bbd9 AM |
7725 | printf ("Found symbol with value %8.8lx\n", |
7726 | (unsigned long) *result); | |
d9352518 DB |
7727 | #endif |
7728 | return TRUE; | |
7729 | } | |
7730 | } | |
7731 | ||
7732 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 7733 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 7734 | FALSE, FALSE, TRUE); |
d9352518 DB |
7735 | if (!global_entry) |
7736 | return FALSE; | |
a0c8462f | 7737 | |
d9352518 DB |
7738 | if (global_entry->type == bfd_link_hash_defined |
7739 | || global_entry->type == bfd_link_hash_defweak) | |
7740 | { | |
a0c8462f AM |
7741 | *result = (global_entry->u.def.value |
7742 | + global_entry->u.def.section->output_section->vma | |
7743 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7744 | #ifdef DEBUG |
0f02bbd9 AM |
7745 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7746 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7747 | #endif |
7748 | return TRUE; | |
a0c8462f | 7749 | } |
d9352518 | 7750 | |
d9352518 DB |
7751 | return FALSE; |
7752 | } | |
7753 | ||
7754 | static bfd_boolean | |
a0c8462f AM |
7755 | resolve_section (const char *name, |
7756 | asection *sections, | |
7757 | bfd_vma *result) | |
d9352518 | 7758 | { |
a0c8462f AM |
7759 | asection *curr; |
7760 | unsigned int len; | |
d9352518 | 7761 | |
a0c8462f | 7762 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7763 | if (strcmp (curr->name, name) == 0) |
7764 | { | |
7765 | *result = curr->vma; | |
7766 | return TRUE; | |
7767 | } | |
7768 | ||
7769 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
a0c8462f | 7770 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7771 | { |
7772 | len = strlen (curr->name); | |
a0c8462f | 7773 | if (len > strlen (name)) |
d9352518 DB |
7774 | continue; |
7775 | ||
7776 | if (strncmp (curr->name, name, len) == 0) | |
7777 | { | |
7778 | if (strncmp (".end", name + len, 4) == 0) | |
7779 | { | |
7780 | *result = curr->vma + curr->size; | |
7781 | return TRUE; | |
7782 | } | |
7783 | ||
7784 | /* Insert more pseudo-section names here, if you like. */ | |
7785 | } | |
7786 | } | |
a0c8462f | 7787 | |
d9352518 DB |
7788 | return FALSE; |
7789 | } | |
7790 | ||
7791 | static void | |
a0c8462f | 7792 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7793 | { |
a0c8462f AM |
7794 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7795 | reftype, name); | |
d9352518 DB |
7796 | } |
7797 | ||
7798 | static bfd_boolean | |
a0c8462f AM |
7799 | eval_symbol (bfd_vma *result, |
7800 | const char **symp, | |
7801 | bfd *input_bfd, | |
8b127cbc | 7802 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7803 | bfd_vma dot, |
7804 | Elf_Internal_Sym *isymbuf, | |
7805 | size_t locsymcount, | |
7806 | int signed_p) | |
d9352518 | 7807 | { |
4b93929b NC |
7808 | size_t len; |
7809 | size_t symlen; | |
a0c8462f AM |
7810 | bfd_vma a; |
7811 | bfd_vma b; | |
4b93929b | 7812 | char symbuf[4096]; |
0f02bbd9 | 7813 | const char *sym = *symp; |
a0c8462f AM |
7814 | const char *symend; |
7815 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7816 | |
7817 | len = strlen (sym); | |
7818 | symend = sym + len; | |
7819 | ||
4b93929b | 7820 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
7821 | { |
7822 | bfd_set_error (bfd_error_invalid_operation); | |
7823 | return FALSE; | |
7824 | } | |
a0c8462f | 7825 | |
d9352518 DB |
7826 | switch (* sym) |
7827 | { | |
7828 | case '.': | |
0f02bbd9 AM |
7829 | *result = dot; |
7830 | *symp = sym + 1; | |
d9352518 DB |
7831 | return TRUE; |
7832 | ||
7833 | case '#': | |
0f02bbd9 AM |
7834 | ++sym; |
7835 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
7836 | return TRUE; |
7837 | ||
7838 | case 'S': | |
7839 | symbol_is_section = TRUE; | |
a0c8462f | 7840 | case 's': |
0f02bbd9 AM |
7841 | ++sym; |
7842 | symlen = strtol (sym, (char **) symp, 10); | |
7843 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 7844 | |
4b93929b | 7845 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
7846 | { |
7847 | bfd_set_error (bfd_error_invalid_operation); | |
7848 | return FALSE; | |
7849 | } | |
7850 | ||
7851 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 7852 | symbuf[symlen] = '\0'; |
0f02bbd9 | 7853 | *symp = sym + symlen; |
a0c8462f AM |
7854 | |
7855 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
7856 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
7857 | interpretation here; section means "try section first", not "must be a | |
7858 | section", and likewise with symbol. */ | |
7859 | ||
a0c8462f | 7860 | if (symbol_is_section) |
d9352518 | 7861 | { |
8b127cbc AM |
7862 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result) |
7863 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, | |
8977835c | 7864 | isymbuf, locsymcount)) |
d9352518 DB |
7865 | { |
7866 | undefined_reference ("section", symbuf); | |
7867 | return FALSE; | |
7868 | } | |
a0c8462f AM |
7869 | } |
7870 | else | |
d9352518 | 7871 | { |
8b127cbc | 7872 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 7873 | isymbuf, locsymcount) |
8b127cbc | 7874 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
8977835c | 7875 | result)) |
d9352518 DB |
7876 | { |
7877 | undefined_reference ("symbol", symbuf); | |
7878 | return FALSE; | |
7879 | } | |
7880 | } | |
7881 | ||
7882 | return TRUE; | |
a0c8462f | 7883 | |
d9352518 DB |
7884 | /* All that remains are operators. */ |
7885 | ||
7886 | #define UNARY_OP(op) \ | |
7887 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7888 | { \ | |
7889 | sym += strlen (#op); \ | |
a0c8462f AM |
7890 | if (*sym == ':') \ |
7891 | ++sym; \ | |
0f02bbd9 | 7892 | *symp = sym; \ |
8b127cbc | 7893 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7894 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7895 | return FALSE; \ |
7896 | if (signed_p) \ | |
0f02bbd9 | 7897 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
7898 | else \ |
7899 | *result = op a; \ | |
d9352518 DB |
7900 | return TRUE; \ |
7901 | } | |
7902 | ||
7903 | #define BINARY_OP(op) \ | |
7904 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7905 | { \ | |
7906 | sym += strlen (#op); \ | |
a0c8462f AM |
7907 | if (*sym == ':') \ |
7908 | ++sym; \ | |
0f02bbd9 | 7909 | *symp = sym; \ |
8b127cbc | 7910 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7911 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 7912 | return FALSE; \ |
0f02bbd9 | 7913 | ++*symp; \ |
8b127cbc | 7914 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7915 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7916 | return FALSE; \ |
7917 | if (signed_p) \ | |
0f02bbd9 | 7918 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
7919 | else \ |
7920 | *result = a op b; \ | |
d9352518 DB |
7921 | return TRUE; \ |
7922 | } | |
7923 | ||
7924 | default: | |
7925 | UNARY_OP (0-); | |
7926 | BINARY_OP (<<); | |
7927 | BINARY_OP (>>); | |
7928 | BINARY_OP (==); | |
7929 | BINARY_OP (!=); | |
7930 | BINARY_OP (<=); | |
7931 | BINARY_OP (>=); | |
7932 | BINARY_OP (&&); | |
7933 | BINARY_OP (||); | |
7934 | UNARY_OP (~); | |
7935 | UNARY_OP (!); | |
7936 | BINARY_OP (*); | |
7937 | BINARY_OP (/); | |
7938 | BINARY_OP (%); | |
7939 | BINARY_OP (^); | |
7940 | BINARY_OP (|); | |
7941 | BINARY_OP (&); | |
7942 | BINARY_OP (+); | |
7943 | BINARY_OP (-); | |
7944 | BINARY_OP (<); | |
7945 | BINARY_OP (>); | |
7946 | #undef UNARY_OP | |
7947 | #undef BINARY_OP | |
7948 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
7949 | bfd_set_error (bfd_error_invalid_operation); | |
7950 | return FALSE; | |
7951 | } | |
7952 | } | |
7953 | ||
d9352518 | 7954 | static void |
a0c8462f AM |
7955 | put_value (bfd_vma size, |
7956 | unsigned long chunksz, | |
7957 | bfd *input_bfd, | |
7958 | bfd_vma x, | |
7959 | bfd_byte *location) | |
d9352518 DB |
7960 | { |
7961 | location += (size - chunksz); | |
7962 | ||
41cd1ad1 | 7963 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
7964 | { |
7965 | switch (chunksz) | |
7966 | { | |
d9352518 DB |
7967 | case 1: |
7968 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 7969 | x >>= 8; |
d9352518 DB |
7970 | break; |
7971 | case 2: | |
7972 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 7973 | x >>= 16; |
d9352518 DB |
7974 | break; |
7975 | case 4: | |
7976 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
7977 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
7978 | x >>= 16; | |
7979 | x >>= 16; | |
d9352518 | 7980 | break; |
d9352518 | 7981 | #ifdef BFD64 |
41cd1ad1 | 7982 | case 8: |
d9352518 | 7983 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
7984 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
7985 | x >>= 32; | |
7986 | x >>= 32; | |
7987 | break; | |
d9352518 | 7988 | #endif |
41cd1ad1 NC |
7989 | default: |
7990 | abort (); | |
d9352518 DB |
7991 | break; |
7992 | } | |
7993 | } | |
7994 | } | |
7995 | ||
a0c8462f AM |
7996 | static bfd_vma |
7997 | get_value (bfd_vma size, | |
7998 | unsigned long chunksz, | |
7999 | bfd *input_bfd, | |
8000 | bfd_byte *location) | |
d9352518 | 8001 | { |
9b239e0e | 8002 | int shift; |
d9352518 DB |
8003 | bfd_vma x = 0; |
8004 | ||
9b239e0e NC |
8005 | /* Sanity checks. */ |
8006 | BFD_ASSERT (chunksz <= sizeof (x) | |
8007 | && size >= chunksz | |
8008 | && chunksz != 0 | |
8009 | && (size % chunksz) == 0 | |
8010 | && input_bfd != NULL | |
8011 | && location != NULL); | |
8012 | ||
8013 | if (chunksz == sizeof (x)) | |
8014 | { | |
8015 | BFD_ASSERT (size == chunksz); | |
8016 | ||
8017 | /* Make sure that we do not perform an undefined shift operation. | |
8018 | We know that size == chunksz so there will only be one iteration | |
8019 | of the loop below. */ | |
8020 | shift = 0; | |
8021 | } | |
8022 | else | |
8023 | shift = 8 * chunksz; | |
8024 | ||
a0c8462f | 8025 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
8026 | { |
8027 | switch (chunksz) | |
8028 | { | |
d9352518 | 8029 | case 1: |
9b239e0e | 8030 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
8031 | break; |
8032 | case 2: | |
9b239e0e | 8033 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
8034 | break; |
8035 | case 4: | |
9b239e0e | 8036 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 8037 | break; |
d9352518 | 8038 | #ifdef BFD64 |
9b239e0e NC |
8039 | case 8: |
8040 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 8041 | break; |
9b239e0e NC |
8042 | #endif |
8043 | default: | |
8044 | abort (); | |
d9352518 DB |
8045 | } |
8046 | } | |
8047 | return x; | |
8048 | } | |
8049 | ||
a0c8462f AM |
8050 | static void |
8051 | decode_complex_addend (unsigned long *start, /* in bits */ | |
8052 | unsigned long *oplen, /* in bits */ | |
8053 | unsigned long *len, /* in bits */ | |
8054 | unsigned long *wordsz, /* in bytes */ | |
8055 | unsigned long *chunksz, /* in bytes */ | |
8056 | unsigned long *lsb0_p, | |
8057 | unsigned long *signed_p, | |
8058 | unsigned long *trunc_p, | |
8059 | unsigned long encoded) | |
d9352518 DB |
8060 | { |
8061 | * start = encoded & 0x3F; | |
8062 | * len = (encoded >> 6) & 0x3F; | |
8063 | * oplen = (encoded >> 12) & 0x3F; | |
8064 | * wordsz = (encoded >> 18) & 0xF; | |
8065 | * chunksz = (encoded >> 22) & 0xF; | |
8066 | * lsb0_p = (encoded >> 27) & 1; | |
8067 | * signed_p = (encoded >> 28) & 1; | |
8068 | * trunc_p = (encoded >> 29) & 1; | |
8069 | } | |
8070 | ||
cdfeee4f | 8071 | bfd_reloc_status_type |
0f02bbd9 | 8072 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 8073 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
8074 | bfd_byte *contents, |
8075 | Elf_Internal_Rela *rel, | |
8076 | bfd_vma relocation) | |
d9352518 | 8077 | { |
0f02bbd9 AM |
8078 | bfd_vma shift, x, mask; |
8079 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 8080 | bfd_reloc_status_type r; |
d9352518 DB |
8081 | |
8082 | /* Perform this reloc, since it is complex. | |
8083 | (this is not to say that it necessarily refers to a complex | |
8084 | symbol; merely that it is a self-describing CGEN based reloc. | |
8085 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 8086 | word size, etc) encoded within it.). */ |
d9352518 | 8087 | |
a0c8462f AM |
8088 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
8089 | &chunksz, &lsb0_p, &signed_p, | |
8090 | &trunc_p, rel->r_addend); | |
d9352518 DB |
8091 | |
8092 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
8093 | ||
8094 | if (lsb0_p) | |
8095 | shift = (start + 1) - len; | |
8096 | else | |
8097 | shift = (8 * wordsz) - (start + len); | |
8098 | ||
5dabe785 | 8099 | /* FIXME: octets_per_byte. */ |
a0c8462f | 8100 | x = get_value (wordsz, chunksz, input_bfd, contents + rel->r_offset); |
d9352518 DB |
8101 | |
8102 | #ifdef DEBUG | |
8103 | printf ("Doing complex reloc: " | |
8104 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
8105 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
8106 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
8107 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
8108 | oplen, (unsigned long) x, (unsigned long) mask, |
8109 | (unsigned long) relocation); | |
d9352518 DB |
8110 | #endif |
8111 | ||
cdfeee4f | 8112 | r = bfd_reloc_ok; |
d9352518 | 8113 | if (! trunc_p) |
cdfeee4f AM |
8114 | /* Now do an overflow check. */ |
8115 | r = bfd_check_overflow ((signed_p | |
8116 | ? complain_overflow_signed | |
8117 | : complain_overflow_unsigned), | |
8118 | len, 0, (8 * wordsz), | |
8119 | relocation); | |
a0c8462f | 8120 | |
d9352518 DB |
8121 | /* Do the deed. */ |
8122 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
8123 | ||
8124 | #ifdef DEBUG | |
8125 | printf (" relocation: %8.8lx\n" | |
8126 | " shifted mask: %8.8lx\n" | |
8127 | " shifted/masked reloc: %8.8lx\n" | |
8128 | " result: %8.8lx\n", | |
9ccb8af9 AM |
8129 | (unsigned long) relocation, (unsigned long) (mask << shift), |
8130 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 8131 | #endif |
5dabe785 | 8132 | /* FIXME: octets_per_byte. */ |
d9352518 | 8133 | put_value (wordsz, chunksz, input_bfd, x, contents + rel->r_offset); |
cdfeee4f | 8134 | return r; |
d9352518 DB |
8135 | } |
8136 | ||
0e287786 AM |
8137 | /* Functions to read r_offset from external (target order) reloc |
8138 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
8139 | know the value is aligned. */ | |
53df40a4 | 8140 | |
0e287786 AM |
8141 | static bfd_vma |
8142 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
8143 | { |
8144 | union aligned32 | |
8145 | { | |
8146 | uint32_t v; | |
8147 | unsigned char c[4]; | |
8148 | }; | |
8149 | const union aligned32 *a | |
0e287786 | 8150 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8151 | |
8152 | uint32_t aval = ( (uint32_t) a->c[0] | |
8153 | | (uint32_t) a->c[1] << 8 | |
8154 | | (uint32_t) a->c[2] << 16 | |
8155 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 8156 | return aval; |
53df40a4 AM |
8157 | } |
8158 | ||
0e287786 AM |
8159 | static bfd_vma |
8160 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
8161 | { |
8162 | union aligned32 | |
8163 | { | |
8164 | uint32_t v; | |
8165 | unsigned char c[4]; | |
8166 | }; | |
8167 | const union aligned32 *a | |
0e287786 | 8168 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8169 | |
8170 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
8171 | | (uint32_t) a->c[1] << 16 | |
8172 | | (uint32_t) a->c[2] << 8 | |
8173 | | (uint32_t) a->c[3]); | |
0e287786 | 8174 | return aval; |
53df40a4 AM |
8175 | } |
8176 | ||
8177 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
8178 | static bfd_vma |
8179 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
8180 | { |
8181 | union aligned64 | |
8182 | { | |
8183 | uint64_t v; | |
8184 | unsigned char c[8]; | |
8185 | }; | |
8186 | const union aligned64 *a | |
0e287786 | 8187 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8188 | |
8189 | uint64_t aval = ( (uint64_t) a->c[0] | |
8190 | | (uint64_t) a->c[1] << 8 | |
8191 | | (uint64_t) a->c[2] << 16 | |
8192 | | (uint64_t) a->c[3] << 24 | |
8193 | | (uint64_t) a->c[4] << 32 | |
8194 | | (uint64_t) a->c[5] << 40 | |
8195 | | (uint64_t) a->c[6] << 48 | |
8196 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 8197 | return aval; |
53df40a4 AM |
8198 | } |
8199 | ||
0e287786 AM |
8200 | static bfd_vma |
8201 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
8202 | { |
8203 | union aligned64 | |
8204 | { | |
8205 | uint64_t v; | |
8206 | unsigned char c[8]; | |
8207 | }; | |
8208 | const union aligned64 *a | |
0e287786 | 8209 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8210 | |
8211 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
8212 | | (uint64_t) a->c[1] << 48 | |
8213 | | (uint64_t) a->c[2] << 40 | |
8214 | | (uint64_t) a->c[3] << 32 | |
8215 | | (uint64_t) a->c[4] << 24 | |
8216 | | (uint64_t) a->c[5] << 16 | |
8217 | | (uint64_t) a->c[6] << 8 | |
8218 | | (uint64_t) a->c[7]); | |
0e287786 | 8219 | return aval; |
53df40a4 AM |
8220 | } |
8221 | #endif | |
8222 | ||
c152c796 AM |
8223 | /* When performing a relocatable link, the input relocations are |
8224 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
8225 | referenced must be updated. Update all the relocations found in |
8226 | RELDATA. */ | |
c152c796 | 8227 | |
bca6d0e3 | 8228 | static bfd_boolean |
c152c796 | 8229 | elf_link_adjust_relocs (bfd *abfd, |
28dbcedc AM |
8230 | struct bfd_elf_section_reloc_data *reldata, |
8231 | bfd_boolean sort) | |
c152c796 AM |
8232 | { |
8233 | unsigned int i; | |
8234 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8235 | bfd_byte *erela; | |
8236 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8237 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8238 | bfd_vma r_type_mask; | |
8239 | int r_sym_shift; | |
d4730f92 BS |
8240 | unsigned int count = reldata->count; |
8241 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 8242 | |
d4730f92 | 8243 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
8244 | { |
8245 | swap_in = bed->s->swap_reloc_in; | |
8246 | swap_out = bed->s->swap_reloc_out; | |
8247 | } | |
d4730f92 | 8248 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
8249 | { |
8250 | swap_in = bed->s->swap_reloca_in; | |
8251 | swap_out = bed->s->swap_reloca_out; | |
8252 | } | |
8253 | else | |
8254 | abort (); | |
8255 | ||
8256 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
8257 | abort (); | |
8258 | ||
8259 | if (bed->s->arch_size == 32) | |
8260 | { | |
8261 | r_type_mask = 0xff; | |
8262 | r_sym_shift = 8; | |
8263 | } | |
8264 | else | |
8265 | { | |
8266 | r_type_mask = 0xffffffff; | |
8267 | r_sym_shift = 32; | |
8268 | } | |
8269 | ||
d4730f92 BS |
8270 | erela = reldata->hdr->contents; |
8271 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
8272 | { |
8273 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
8274 | unsigned int j; | |
8275 | ||
8276 | if (*rel_hash == NULL) | |
8277 | continue; | |
8278 | ||
8279 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
8280 | ||
8281 | (*swap_in) (abfd, erela, irela); | |
8282 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
8283 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
8284 | | (irela[j].r_info & r_type_mask)); | |
8285 | (*swap_out) (abfd, irela, erela); | |
8286 | } | |
53df40a4 | 8287 | |
0e287786 | 8288 | if (sort && count != 0) |
53df40a4 | 8289 | { |
0e287786 AM |
8290 | bfd_vma (*ext_r_off) (const void *); |
8291 | bfd_vma r_off; | |
8292 | size_t elt_size; | |
8293 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 8294 | bfd_byte *buf = NULL; |
28dbcedc AM |
8295 | |
8296 | if (bed->s->arch_size == 32) | |
8297 | { | |
8298 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 8299 | ext_r_off = ext32l_r_offset; |
28dbcedc | 8300 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8301 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
8302 | else |
8303 | abort (); | |
8304 | } | |
53df40a4 | 8305 | else |
28dbcedc | 8306 | { |
53df40a4 | 8307 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 8308 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 8309 | ext_r_off = ext64l_r_offset; |
28dbcedc | 8310 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8311 | ext_r_off = ext64b_r_offset; |
28dbcedc | 8312 | else |
53df40a4 | 8313 | #endif |
28dbcedc AM |
8314 | abort (); |
8315 | } | |
0e287786 | 8316 | |
bca6d0e3 AM |
8317 | /* Must use a stable sort here. A modified insertion sort, |
8318 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
8319 | elt_size = reldata->hdr->sh_entsize; |
8320 | base = reldata->hdr->contents; | |
8321 | end = base + count * elt_size; | |
bca6d0e3 | 8322 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
8323 | abort (); |
8324 | ||
8325 | /* Ensure the first element is lowest. This acts as a sentinel, | |
8326 | speeding the main loop below. */ | |
8327 | r_off = (*ext_r_off) (base); | |
8328 | for (p = loc = base; (p += elt_size) < end; ) | |
8329 | { | |
8330 | bfd_vma r_off2 = (*ext_r_off) (p); | |
8331 | if (r_off > r_off2) | |
8332 | { | |
8333 | r_off = r_off2; | |
8334 | loc = p; | |
8335 | } | |
8336 | } | |
8337 | if (loc != base) | |
8338 | { | |
8339 | /* Don't just swap *base and *loc as that changes the order | |
8340 | of the original base[0] and base[1] if they happen to | |
8341 | have the same r_offset. */ | |
bca6d0e3 AM |
8342 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
8343 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 8344 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 8345 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
8346 | } |
8347 | ||
b29b8669 | 8348 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
8349 | { |
8350 | /* base to p is sorted, *p is next to insert. */ | |
8351 | r_off = (*ext_r_off) (p); | |
8352 | /* Search the sorted region for location to insert. */ | |
8353 | loc = p - elt_size; | |
8354 | while (r_off < (*ext_r_off) (loc)) | |
8355 | loc -= elt_size; | |
8356 | loc += elt_size; | |
8357 | if (loc != p) | |
8358 | { | |
bca6d0e3 AM |
8359 | /* Chances are there is a run of relocs to insert here, |
8360 | from one of more input files. Files are not always | |
8361 | linked in order due to the way elf_link_input_bfd is | |
8362 | called. See pr17666. */ | |
8363 | size_t sortlen = p - loc; | |
8364 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
8365 | size_t runlen = elt_size; | |
8366 | size_t buf_size = 96 * 1024; | |
8367 | while (p + runlen < end | |
8368 | && (sortlen <= buf_size | |
8369 | || runlen + elt_size <= buf_size) | |
8370 | && r_off2 > (*ext_r_off) (p + runlen)) | |
8371 | runlen += elt_size; | |
8372 | if (buf == NULL) | |
8373 | { | |
8374 | buf = bfd_malloc (buf_size); | |
8375 | if (buf == NULL) | |
8376 | return FALSE; | |
8377 | } | |
8378 | if (runlen < sortlen) | |
8379 | { | |
8380 | memcpy (buf, p, runlen); | |
8381 | memmove (loc + runlen, loc, sortlen); | |
8382 | memcpy (loc, buf, runlen); | |
8383 | } | |
8384 | else | |
8385 | { | |
8386 | memcpy (buf, loc, sortlen); | |
8387 | memmove (loc, p, runlen); | |
8388 | memcpy (loc + runlen, buf, sortlen); | |
8389 | } | |
b29b8669 | 8390 | p += runlen - elt_size; |
0e287786 AM |
8391 | } |
8392 | } | |
8393 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
8394 | free (reldata->hashes); |
8395 | reldata->hashes = NULL; | |
bca6d0e3 | 8396 | free (buf); |
53df40a4 | 8397 | } |
bca6d0e3 | 8398 | return TRUE; |
c152c796 AM |
8399 | } |
8400 | ||
8401 | struct elf_link_sort_rela | |
8402 | { | |
8403 | union { | |
8404 | bfd_vma offset; | |
8405 | bfd_vma sym_mask; | |
8406 | } u; | |
8407 | enum elf_reloc_type_class type; | |
8408 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8409 | Elf_Internal_Rela rela[1]; | |
8410 | }; | |
8411 | ||
8412 | static int | |
8413 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8414 | { | |
a50b1753 NC |
8415 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8416 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8417 | int relativea, relativeb; |
8418 | ||
8419 | relativea = a->type == reloc_class_relative; | |
8420 | relativeb = b->type == reloc_class_relative; | |
8421 | ||
8422 | if (relativea < relativeb) | |
8423 | return 1; | |
8424 | if (relativea > relativeb) | |
8425 | return -1; | |
8426 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8427 | return -1; | |
8428 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8429 | return 1; | |
8430 | if (a->rela->r_offset < b->rela->r_offset) | |
8431 | return -1; | |
8432 | if (a->rela->r_offset > b->rela->r_offset) | |
8433 | return 1; | |
8434 | return 0; | |
8435 | } | |
8436 | ||
8437 | static int | |
8438 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8439 | { | |
a50b1753 NC |
8440 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8441 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 8442 | |
7e612e98 | 8443 | if (a->type < b->type) |
c152c796 | 8444 | return -1; |
7e612e98 | 8445 | if (a->type > b->type) |
c152c796 | 8446 | return 1; |
7e612e98 | 8447 | if (a->u.offset < b->u.offset) |
c152c796 | 8448 | return -1; |
7e612e98 | 8449 | if (a->u.offset > b->u.offset) |
c152c796 AM |
8450 | return 1; |
8451 | if (a->rela->r_offset < b->rela->r_offset) | |
8452 | return -1; | |
8453 | if (a->rela->r_offset > b->rela->r_offset) | |
8454 | return 1; | |
8455 | return 0; | |
8456 | } | |
8457 | ||
8458 | static size_t | |
8459 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8460 | { | |
3410fea8 | 8461 | asection *dynamic_relocs; |
fc66a176 L |
8462 | asection *rela_dyn; |
8463 | asection *rel_dyn; | |
c152c796 AM |
8464 | bfd_size_type count, size; |
8465 | size_t i, ret, sort_elt, ext_size; | |
8466 | bfd_byte *sort, *s_non_relative, *p; | |
8467 | struct elf_link_sort_rela *sq; | |
8468 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8469 | int i2e = bed->s->int_rels_per_ext_rel; | |
8470 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8471 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8472 | struct bfd_link_order *lo; | |
8473 | bfd_vma r_sym_mask; | |
3410fea8 | 8474 | bfd_boolean use_rela; |
c152c796 | 8475 | |
3410fea8 NC |
8476 | /* Find a dynamic reloc section. */ |
8477 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8478 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8479 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8480 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8481 | { |
3410fea8 NC |
8482 | bfd_boolean use_rela_initialised = FALSE; |
8483 | ||
8484 | /* This is just here to stop gcc from complaining. | |
8485 | It's initialization checking code is not perfect. */ | |
8486 | use_rela = TRUE; | |
8487 | ||
8488 | /* Both sections are present. Examine the sizes | |
8489 | of the indirect sections to help us choose. */ | |
8490 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8491 | if (lo->type == bfd_indirect_link_order) | |
8492 | { | |
8493 | asection *o = lo->u.indirect.section; | |
8494 | ||
8495 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8496 | { | |
8497 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8498 | /* Section size is divisible by both rel and rela sizes. | |
8499 | It is of no help to us. */ | |
8500 | ; | |
8501 | else | |
8502 | { | |
8503 | /* Section size is only divisible by rela. */ | |
8504 | if (use_rela_initialised && (use_rela == FALSE)) | |
8505 | { | |
8506 | _bfd_error_handler | |
8507 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8508 | bfd_set_error (bfd_error_invalid_operation); | |
8509 | return 0; | |
8510 | } | |
8511 | else | |
8512 | { | |
8513 | use_rela = TRUE; | |
8514 | use_rela_initialised = TRUE; | |
8515 | } | |
8516 | } | |
8517 | } | |
8518 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8519 | { | |
8520 | /* Section size is only divisible by rel. */ | |
8521 | if (use_rela_initialised && (use_rela == TRUE)) | |
8522 | { | |
8523 | _bfd_error_handler | |
8524 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8525 | bfd_set_error (bfd_error_invalid_operation); | |
8526 | return 0; | |
8527 | } | |
8528 | else | |
8529 | { | |
8530 | use_rela = FALSE; | |
8531 | use_rela_initialised = TRUE; | |
8532 | } | |
8533 | } | |
8534 | else | |
8535 | { | |
8536 | /* The section size is not divisible by either - something is wrong. */ | |
8537 | _bfd_error_handler | |
8538 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8539 | bfd_set_error (bfd_error_invalid_operation); | |
8540 | return 0; | |
8541 | } | |
8542 | } | |
8543 | ||
8544 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8545 | if (lo->type == bfd_indirect_link_order) | |
8546 | { | |
8547 | asection *o = lo->u.indirect.section; | |
8548 | ||
8549 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8550 | { | |
8551 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8552 | /* Section size is divisible by both rel and rela sizes. | |
8553 | It is of no help to us. */ | |
8554 | ; | |
8555 | else | |
8556 | { | |
8557 | /* Section size is only divisible by rela. */ | |
8558 | if (use_rela_initialised && (use_rela == FALSE)) | |
8559 | { | |
8560 | _bfd_error_handler | |
8561 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8562 | bfd_set_error (bfd_error_invalid_operation); | |
8563 | return 0; | |
8564 | } | |
8565 | else | |
8566 | { | |
8567 | use_rela = TRUE; | |
8568 | use_rela_initialised = TRUE; | |
8569 | } | |
8570 | } | |
8571 | } | |
8572 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8573 | { | |
8574 | /* Section size is only divisible by rel. */ | |
8575 | if (use_rela_initialised && (use_rela == TRUE)) | |
8576 | { | |
8577 | _bfd_error_handler | |
8578 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8579 | bfd_set_error (bfd_error_invalid_operation); | |
8580 | return 0; | |
8581 | } | |
8582 | else | |
8583 | { | |
8584 | use_rela = FALSE; | |
8585 | use_rela_initialised = TRUE; | |
8586 | } | |
8587 | } | |
8588 | else | |
8589 | { | |
8590 | /* The section size is not divisible by either - something is wrong. */ | |
8591 | _bfd_error_handler | |
8592 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8593 | bfd_set_error (bfd_error_invalid_operation); | |
8594 | return 0; | |
8595 | } | |
8596 | } | |
8597 | ||
8598 | if (! use_rela_initialised) | |
8599 | /* Make a guess. */ | |
8600 | use_rela = TRUE; | |
c152c796 | 8601 | } |
fc66a176 L |
8602 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8603 | use_rela = TRUE; | |
8604 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8605 | use_rela = FALSE; |
c152c796 | 8606 | else |
fc66a176 | 8607 | return 0; |
3410fea8 NC |
8608 | |
8609 | if (use_rela) | |
c152c796 | 8610 | { |
3410fea8 | 8611 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8612 | ext_size = bed->s->sizeof_rela; |
8613 | swap_in = bed->s->swap_reloca_in; | |
8614 | swap_out = bed->s->swap_reloca_out; | |
8615 | } | |
3410fea8 NC |
8616 | else |
8617 | { | |
8618 | dynamic_relocs = rel_dyn; | |
8619 | ext_size = bed->s->sizeof_rel; | |
8620 | swap_in = bed->s->swap_reloc_in; | |
8621 | swap_out = bed->s->swap_reloc_out; | |
8622 | } | |
c152c796 AM |
8623 | |
8624 | size = 0; | |
3410fea8 | 8625 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8626 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8627 | size += lo->u.indirect.section->size; |
c152c796 | 8628 | |
3410fea8 | 8629 | if (size != dynamic_relocs->size) |
c152c796 AM |
8630 | return 0; |
8631 | ||
8632 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8633 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8634 | |
8635 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8636 | if (count == 0) |
8637 | return 0; | |
a50b1753 | 8638 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8639 | |
c152c796 AM |
8640 | if (sort == NULL) |
8641 | { | |
8642 | (*info->callbacks->warning) | |
8643 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8644 | return 0; | |
8645 | } | |
8646 | ||
8647 | if (bed->s->arch_size == 32) | |
8648 | r_sym_mask = ~(bfd_vma) 0xff; | |
8649 | else | |
8650 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8651 | ||
3410fea8 | 8652 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8653 | if (lo->type == bfd_indirect_link_order) |
8654 | { | |
8655 | bfd_byte *erel, *erelend; | |
8656 | asection *o = lo->u.indirect.section; | |
8657 | ||
1da212d6 AM |
8658 | if (o->contents == NULL && o->size != 0) |
8659 | { | |
8660 | /* This is a reloc section that is being handled as a normal | |
8661 | section. See bfd_section_from_shdr. We can't combine | |
8662 | relocs in this case. */ | |
8663 | free (sort); | |
8664 | return 0; | |
8665 | } | |
c152c796 | 8666 | erel = o->contents; |
eea6121a | 8667 | erelend = o->contents + o->size; |
5dabe785 | 8668 | /* FIXME: octets_per_byte. */ |
c152c796 | 8669 | p = sort + o->output_offset / ext_size * sort_elt; |
3410fea8 | 8670 | |
c152c796 AM |
8671 | while (erel < erelend) |
8672 | { | |
8673 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8674 | |
c152c796 | 8675 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 8676 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
8677 | s->u.sym_mask = r_sym_mask; |
8678 | p += sort_elt; | |
8679 | erel += ext_size; | |
8680 | } | |
8681 | } | |
8682 | ||
8683 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8684 | ||
8685 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8686 | { | |
8687 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8688 | if (s->type != reloc_class_relative) | |
8689 | break; | |
8690 | } | |
8691 | ret = i; | |
8692 | s_non_relative = p; | |
8693 | ||
8694 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8695 | for (; i < count; i++, p += sort_elt) | |
8696 | { | |
8697 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8698 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8699 | sq = sp; | |
8700 | sp->u.offset = sq->rela->r_offset; | |
8701 | } | |
8702 | ||
8703 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8704 | ||
3410fea8 | 8705 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8706 | if (lo->type == bfd_indirect_link_order) |
8707 | { | |
8708 | bfd_byte *erel, *erelend; | |
8709 | asection *o = lo->u.indirect.section; | |
8710 | ||
8711 | erel = o->contents; | |
eea6121a | 8712 | erelend = o->contents + o->size; |
5dabe785 | 8713 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
8714 | p = sort + o->output_offset / ext_size * sort_elt; |
8715 | while (erel < erelend) | |
8716 | { | |
8717 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8718 | (*swap_out) (abfd, s->rela, erel); | |
8719 | p += sort_elt; | |
8720 | erel += ext_size; | |
8721 | } | |
8722 | } | |
8723 | ||
8724 | free (sort); | |
3410fea8 | 8725 | *psec = dynamic_relocs; |
c152c796 AM |
8726 | return ret; |
8727 | } | |
8728 | ||
ef10c3ac | 8729 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 8730 | |
6e0b88f1 | 8731 | static int |
ef10c3ac L |
8732 | elf_link_output_symstrtab (struct elf_final_link_info *flinfo, |
8733 | const char *name, | |
8734 | Elf_Internal_Sym *elfsym, | |
8735 | asection *input_sec, | |
8736 | struct elf_link_hash_entry *h) | |
c152c796 | 8737 | { |
6e0b88f1 | 8738 | int (*output_symbol_hook) |
c152c796 AM |
8739 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8740 | struct elf_link_hash_entry *); | |
ef10c3ac | 8741 | struct elf_link_hash_table *hash_table; |
c152c796 | 8742 | const struct elf_backend_data *bed; |
ef10c3ac | 8743 | bfd_size_type strtabsize; |
c152c796 | 8744 | |
8539e4e8 AM |
8745 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
8746 | ||
8b127cbc | 8747 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
8748 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
8749 | if (output_symbol_hook != NULL) | |
8750 | { | |
8b127cbc | 8751 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
8752 | if (ret != 1) |
8753 | return ret; | |
c152c796 AM |
8754 | } |
8755 | ||
ef10c3ac L |
8756 | if (name == NULL |
8757 | || *name == '\0' | |
8758 | || (input_sec->flags & SEC_EXCLUDE)) | |
8759 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
8760 | else |
8761 | { | |
ef10c3ac L |
8762 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
8763 | to get the final offset for st_name. */ | |
8764 | elfsym->st_name | |
8765 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
8766 | name, FALSE); | |
c152c796 | 8767 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 8768 | return 0; |
c152c796 AM |
8769 | } |
8770 | ||
ef10c3ac L |
8771 | hash_table = elf_hash_table (flinfo->info); |
8772 | strtabsize = hash_table->strtabsize; | |
8773 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 8774 | { |
ef10c3ac L |
8775 | strtabsize += strtabsize; |
8776 | hash_table->strtabsize = strtabsize; | |
8777 | strtabsize *= sizeof (*hash_table->strtab); | |
8778 | hash_table->strtab | |
8779 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
8780 | strtabsize); | |
8781 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 8782 | return 0; |
c152c796 | 8783 | } |
ef10c3ac L |
8784 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
8785 | hash_table->strtab[hash_table->strtabcount].dest_index | |
8786 | = hash_table->strtabcount; | |
8787 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
8788 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
8789 | ||
8790 | bfd_get_symcount (flinfo->output_bfd) += 1; | |
8791 | hash_table->strtabcount += 1; | |
8792 | ||
8793 | return 1; | |
8794 | } | |
8795 | ||
8796 | /* Swap symbols out to the symbol table and flush the output symbols to | |
8797 | the file. */ | |
8798 | ||
8799 | static bfd_boolean | |
8800 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) | |
8801 | { | |
8802 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
8803 | bfd_size_type amt, i; | |
8804 | const struct elf_backend_data *bed; | |
8805 | bfd_byte *symbuf; | |
8806 | Elf_Internal_Shdr *hdr; | |
8807 | file_ptr pos; | |
8808 | bfd_boolean ret; | |
8809 | ||
8810 | if (!hash_table->strtabcount) | |
8811 | return TRUE; | |
8812 | ||
8813 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
8814 | ||
8815 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 8816 | |
ef10c3ac L |
8817 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
8818 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
8819 | if (symbuf == NULL) | |
8820 | return FALSE; | |
1b786873 | 8821 | |
ef10c3ac | 8822 | if (flinfo->symshndxbuf) |
c152c796 | 8823 | { |
ef10c3ac L |
8824 | amt = (sizeof (Elf_External_Sym_Shndx) |
8825 | * (bfd_get_symcount (flinfo->output_bfd))); | |
8826 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); | |
8827 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 8828 | { |
ef10c3ac L |
8829 | free (symbuf); |
8830 | return FALSE; | |
c152c796 | 8831 | } |
c152c796 AM |
8832 | } |
8833 | ||
ef10c3ac L |
8834 | for (i = 0; i < hash_table->strtabcount; i++) |
8835 | { | |
8836 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
8837 | if (elfsym->sym.st_name == (unsigned long) -1) | |
8838 | elfsym->sym.st_name = 0; | |
8839 | else | |
8840 | elfsym->sym.st_name | |
8841 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
8842 | elfsym->sym.st_name); | |
8843 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, | |
8844 | ((bfd_byte *) symbuf | |
8845 | + (elfsym->dest_index | |
8846 | * bed->s->sizeof_sym)), | |
8847 | (flinfo->symshndxbuf | |
8848 | + elfsym->destshndx_index)); | |
8849 | } | |
8850 | ||
8851 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
8852 | pos = hdr->sh_offset + hdr->sh_size; | |
8853 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
8854 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
8855 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
8856 | { | |
8857 | hdr->sh_size += amt; | |
8858 | ret = TRUE; | |
8859 | } | |
8860 | else | |
8861 | ret = FALSE; | |
c152c796 | 8862 | |
ef10c3ac L |
8863 | free (symbuf); |
8864 | ||
8865 | free (hash_table->strtab); | |
8866 | hash_table->strtab = NULL; | |
8867 | ||
8868 | return ret; | |
c152c796 AM |
8869 | } |
8870 | ||
c0d5a53d L |
8871 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
8872 | ||
8873 | static bfd_boolean | |
8874 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
8875 | { | |
4fbb74a6 AM |
8876 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
8877 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
8878 | { |
8879 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 8880 | beyond 64k. */ |
c0d5a53d L |
8881 | (*_bfd_error_handler) |
8882 | (_("%B: Too many sections: %d (>= %d)"), | |
4fbb74a6 | 8883 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
8884 | bfd_set_error (bfd_error_nonrepresentable_section); |
8885 | return FALSE; | |
8886 | } | |
8887 | return TRUE; | |
8888 | } | |
8889 | ||
c152c796 AM |
8890 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
8891 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
8892 | versioned symbol that would normally require an explicit version. | |
8893 | We also handle the case that a DSO references a hidden symbol | |
8894 | which may be satisfied by a versioned symbol in another DSO. */ | |
8895 | ||
8896 | static bfd_boolean | |
8897 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
8898 | const struct elf_backend_data *bed, | |
8899 | struct elf_link_hash_entry *h) | |
8900 | { | |
8901 | bfd *abfd; | |
8902 | struct elf_link_loaded_list *loaded; | |
8903 | ||
8904 | if (!is_elf_hash_table (info->hash)) | |
8905 | return FALSE; | |
8906 | ||
90c984fc L |
8907 | /* Check indirect symbol. */ |
8908 | while (h->root.type == bfd_link_hash_indirect) | |
8909 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8910 | ||
c152c796 AM |
8911 | switch (h->root.type) |
8912 | { | |
8913 | default: | |
8914 | abfd = NULL; | |
8915 | break; | |
8916 | ||
8917 | case bfd_link_hash_undefined: | |
8918 | case bfd_link_hash_undefweak: | |
8919 | abfd = h->root.u.undef.abfd; | |
8920 | if ((abfd->flags & DYNAMIC) == 0 | |
e56f61be | 8921 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
8922 | return FALSE; |
8923 | break; | |
8924 | ||
8925 | case bfd_link_hash_defined: | |
8926 | case bfd_link_hash_defweak: | |
8927 | abfd = h->root.u.def.section->owner; | |
8928 | break; | |
8929 | ||
8930 | case bfd_link_hash_common: | |
8931 | abfd = h->root.u.c.p->section->owner; | |
8932 | break; | |
8933 | } | |
8934 | BFD_ASSERT (abfd != NULL); | |
8935 | ||
8936 | for (loaded = elf_hash_table (info)->loaded; | |
8937 | loaded != NULL; | |
8938 | loaded = loaded->next) | |
8939 | { | |
8940 | bfd *input; | |
8941 | Elf_Internal_Shdr *hdr; | |
8942 | bfd_size_type symcount; | |
8943 | bfd_size_type extsymcount; | |
8944 | bfd_size_type extsymoff; | |
8945 | Elf_Internal_Shdr *versymhdr; | |
8946 | Elf_Internal_Sym *isym; | |
8947 | Elf_Internal_Sym *isymend; | |
8948 | Elf_Internal_Sym *isymbuf; | |
8949 | Elf_External_Versym *ever; | |
8950 | Elf_External_Versym *extversym; | |
8951 | ||
8952 | input = loaded->abfd; | |
8953 | ||
8954 | /* We check each DSO for a possible hidden versioned definition. */ | |
8955 | if (input == abfd | |
8956 | || (input->flags & DYNAMIC) == 0 | |
8957 | || elf_dynversym (input) == 0) | |
8958 | continue; | |
8959 | ||
8960 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
8961 | ||
8962 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
8963 | if (elf_bad_symtab (input)) | |
8964 | { | |
8965 | extsymcount = symcount; | |
8966 | extsymoff = 0; | |
8967 | } | |
8968 | else | |
8969 | { | |
8970 | extsymcount = symcount - hdr->sh_info; | |
8971 | extsymoff = hdr->sh_info; | |
8972 | } | |
8973 | ||
8974 | if (extsymcount == 0) | |
8975 | continue; | |
8976 | ||
8977 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
8978 | NULL, NULL, NULL); | |
8979 | if (isymbuf == NULL) | |
8980 | return FALSE; | |
8981 | ||
8982 | /* Read in any version definitions. */ | |
8983 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 8984 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
8985 | if (extversym == NULL) |
8986 | goto error_ret; | |
8987 | ||
8988 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
8989 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
8990 | != versymhdr->sh_size)) | |
8991 | { | |
8992 | free (extversym); | |
8993 | error_ret: | |
8994 | free (isymbuf); | |
8995 | return FALSE; | |
8996 | } | |
8997 | ||
8998 | ever = extversym + extsymoff; | |
8999 | isymend = isymbuf + extsymcount; | |
9000 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
9001 | { | |
9002 | const char *name; | |
9003 | Elf_Internal_Versym iver; | |
9004 | unsigned short version_index; | |
9005 | ||
9006 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
9007 | || isym->st_shndx == SHN_UNDEF) | |
9008 | continue; | |
9009 | ||
9010 | name = bfd_elf_string_from_elf_section (input, | |
9011 | hdr->sh_link, | |
9012 | isym->st_name); | |
9013 | if (strcmp (name, h->root.root.string) != 0) | |
9014 | continue; | |
9015 | ||
9016 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
9017 | ||
d023c380 L |
9018 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
9019 | && !(h->def_regular | |
9020 | && h->forced_local)) | |
c152c796 AM |
9021 | { |
9022 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
9023 | have provided a definition for the undefined sym unless |
9024 | it is defined in a non-shared object and forced local. | |
9025 | */ | |
c152c796 AM |
9026 | abort (); |
9027 | } | |
9028 | ||
9029 | version_index = iver.vs_vers & VERSYM_VERSION; | |
9030 | if (version_index == 1 || version_index == 2) | |
9031 | { | |
9032 | /* This is the base or first version. We can use it. */ | |
9033 | free (extversym); | |
9034 | free (isymbuf); | |
9035 | return TRUE; | |
9036 | } | |
9037 | } | |
9038 | ||
9039 | free (extversym); | |
9040 | free (isymbuf); | |
9041 | } | |
9042 | ||
9043 | return FALSE; | |
9044 | } | |
9045 | ||
b8871f35 L |
9046 | /* Convert ELF common symbol TYPE. */ |
9047 | ||
9048 | static int | |
9049 | elf_link_convert_common_type (struct bfd_link_info *info, int type) | |
9050 | { | |
9051 | /* Commom symbol can only appear in relocatable link. */ | |
9052 | if (!bfd_link_relocatable (info)) | |
9053 | abort (); | |
9054 | switch (info->elf_stt_common) | |
9055 | { | |
9056 | case unchanged: | |
9057 | break; | |
9058 | case elf_stt_common: | |
9059 | type = STT_COMMON; | |
9060 | break; | |
9061 | case no_elf_stt_common: | |
9062 | type = STT_OBJECT; | |
9063 | break; | |
9064 | } | |
9065 | return type; | |
9066 | } | |
9067 | ||
c152c796 AM |
9068 | /* Add an external symbol to the symbol table. This is called from |
9069 | the hash table traversal routine. When generating a shared object, | |
9070 | we go through the symbol table twice. The first time we output | |
9071 | anything that might have been forced to local scope in a version | |
9072 | script. The second time we output the symbols that are still | |
9073 | global symbols. */ | |
9074 | ||
9075 | static bfd_boolean | |
7686d77d | 9076 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 9077 | { |
7686d77d | 9078 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 9079 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 9080 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
9081 | bfd_boolean strip; |
9082 | Elf_Internal_Sym sym; | |
9083 | asection *input_sec; | |
9084 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
9085 | long indx; |
9086 | int ret; | |
b8871f35 | 9087 | unsigned int type; |
6e33951e L |
9088 | /* A symbol is bound locally if it is forced local or it is locally |
9089 | defined, hidden versioned, not referenced by shared library and | |
9090 | not exported when linking executable. */ | |
9091 | bfd_boolean local_bind = (h->forced_local | |
0e1862bb | 9092 | || (bfd_link_executable (flinfo->info) |
6e33951e L |
9093 | && !flinfo->info->export_dynamic |
9094 | && !h->dynamic | |
9095 | && !h->ref_dynamic | |
9096 | && h->def_regular | |
422f1182 | 9097 | && h->versioned == versioned_hidden)); |
c152c796 AM |
9098 | |
9099 | if (h->root.type == bfd_link_hash_warning) | |
9100 | { | |
9101 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9102 | if (h->root.type == bfd_link_hash_new) | |
9103 | return TRUE; | |
9104 | } | |
9105 | ||
9106 | /* Decide whether to output this symbol in this pass. */ | |
9107 | if (eoinfo->localsyms) | |
9108 | { | |
6e33951e | 9109 | if (!local_bind) |
c152c796 AM |
9110 | return TRUE; |
9111 | } | |
9112 | else | |
9113 | { | |
6e33951e | 9114 | if (local_bind) |
c152c796 AM |
9115 | return TRUE; |
9116 | } | |
9117 | ||
8b127cbc | 9118 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 9119 | |
12ac1cf5 | 9120 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 9121 | { |
12ac1cf5 NC |
9122 | /* If we have an undefined symbol reference here then it must have |
9123 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
9124 | references in regular files have already been handled unless |
9125 | they are in unreferenced sections which are removed by garbage | |
9126 | collection). */ | |
12ac1cf5 NC |
9127 | bfd_boolean ignore_undef = FALSE; |
9128 | ||
9129 | /* Some symbols may be special in that the fact that they're | |
9130 | undefined can be safely ignored - let backend determine that. */ | |
9131 | if (bed->elf_backend_ignore_undef_symbol) | |
9132 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
9133 | ||
9134 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 9135 | if (!ignore_undef |
12ac1cf5 | 9136 | && h->ref_dynamic |
8b127cbc AM |
9137 | && (!h->ref_regular || flinfo->info->gc_sections) |
9138 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
9139 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
9140 | { | |
9141 | if (!(flinfo->info->callbacks->undefined_symbol | |
9142 | (flinfo->info, h->root.root.string, | |
9143 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
9144 | NULL, 0, | |
9145 | (flinfo->info->unresolved_syms_in_shared_libs | |
9146 | == RM_GENERATE_ERROR)))) | |
12ac1cf5 | 9147 | { |
17d078c5 | 9148 | bfd_set_error (bfd_error_bad_value); |
12ac1cf5 NC |
9149 | eoinfo->failed = TRUE; |
9150 | return FALSE; | |
9151 | } | |
c152c796 AM |
9152 | } |
9153 | } | |
9154 | ||
9155 | /* We should also warn if a forced local symbol is referenced from | |
9156 | shared libraries. */ | |
0e1862bb | 9157 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
9158 | && h->forced_local |
9159 | && h->ref_dynamic | |
371a5866 | 9160 | && h->def_regular |
f5385ebf | 9161 | && !h->dynamic_def |
ee659f1f | 9162 | && h->ref_dynamic_nonweak |
8b127cbc | 9163 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 9164 | { |
17d078c5 AM |
9165 | bfd *def_bfd; |
9166 | const char *msg; | |
90c984fc L |
9167 | struct elf_link_hash_entry *hi = h; |
9168 | ||
9169 | /* Check indirect symbol. */ | |
9170 | while (hi->root.type == bfd_link_hash_indirect) | |
9171 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
9172 | |
9173 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
9174 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); | |
9175 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
9176 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); | |
9177 | else | |
9178 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); | |
8b127cbc | 9179 | def_bfd = flinfo->output_bfd; |
90c984fc L |
9180 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
9181 | def_bfd = hi->root.u.def.section->owner; | |
8b127cbc | 9182 | (*_bfd_error_handler) (msg, flinfo->output_bfd, def_bfd, |
17d078c5 AM |
9183 | h->root.root.string); |
9184 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
9185 | eoinfo->failed = TRUE; |
9186 | return FALSE; | |
9187 | } | |
9188 | ||
9189 | /* We don't want to output symbols that have never been mentioned by | |
9190 | a regular file, or that we have been told to strip. However, if | |
9191 | h->indx is set to -2, the symbol is used by a reloc and we must | |
9192 | output it. */ | |
d983c8c5 | 9193 | strip = FALSE; |
c152c796 | 9194 | if (h->indx == -2) |
d983c8c5 | 9195 | ; |
f5385ebf | 9196 | else if ((h->def_dynamic |
77cfaee6 AM |
9197 | || h->ref_dynamic |
9198 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
9199 | && !h->def_regular |
9200 | && !h->ref_regular) | |
c152c796 | 9201 | strip = TRUE; |
8b127cbc | 9202 | else if (flinfo->info->strip == strip_all) |
c152c796 | 9203 | strip = TRUE; |
8b127cbc AM |
9204 | else if (flinfo->info->strip == strip_some |
9205 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
9206 | h->root.root.string, FALSE, FALSE) == NULL) |
9207 | strip = TRUE; | |
d56d55e7 AM |
9208 | else if ((h->root.type == bfd_link_hash_defined |
9209 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 9210 | && ((flinfo->info->strip_discarded |
dbaa2011 | 9211 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
9212 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
9213 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 9214 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
c152c796 | 9215 | strip = TRUE; |
9e2278f5 AM |
9216 | else if ((h->root.type == bfd_link_hash_undefined |
9217 | || h->root.type == bfd_link_hash_undefweak) | |
9218 | && h->root.u.undef.abfd != NULL | |
9219 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
9220 | strip = TRUE; | |
c152c796 | 9221 | |
b8871f35 L |
9222 | type = h->type; |
9223 | ||
c152c796 | 9224 | /* If we're stripping it, and it's not a dynamic symbol, there's |
d983c8c5 AM |
9225 | nothing else to do. However, if it is a forced local symbol or |
9226 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
9227 | function a chance to make it dynamic. */ | |
c152c796 AM |
9228 | if (strip |
9229 | && h->dynindx == -1 | |
b8871f35 | 9230 | && type != STT_GNU_IFUNC |
f5385ebf | 9231 | && !h->forced_local) |
c152c796 AM |
9232 | return TRUE; |
9233 | ||
9234 | sym.st_value = 0; | |
9235 | sym.st_size = h->size; | |
9236 | sym.st_other = h->other; | |
c152c796 AM |
9237 | switch (h->root.type) |
9238 | { | |
9239 | default: | |
9240 | case bfd_link_hash_new: | |
9241 | case bfd_link_hash_warning: | |
9242 | abort (); | |
9243 | return FALSE; | |
9244 | ||
9245 | case bfd_link_hash_undefined: | |
9246 | case bfd_link_hash_undefweak: | |
9247 | input_sec = bfd_und_section_ptr; | |
9248 | sym.st_shndx = SHN_UNDEF; | |
9249 | break; | |
9250 | ||
9251 | case bfd_link_hash_defined: | |
9252 | case bfd_link_hash_defweak: | |
9253 | { | |
9254 | input_sec = h->root.u.def.section; | |
9255 | if (input_sec->output_section != NULL) | |
9256 | { | |
9257 | sym.st_shndx = | |
8b127cbc | 9258 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
9259 | input_sec->output_section); |
9260 | if (sym.st_shndx == SHN_BAD) | |
9261 | { | |
9262 | (*_bfd_error_handler) | |
d003868e | 9263 | (_("%B: could not find output section %A for input section %A"), |
8b127cbc | 9264 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 9265 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
9266 | eoinfo->failed = TRUE; |
9267 | return FALSE; | |
9268 | } | |
9269 | ||
9270 | /* ELF symbols in relocatable files are section relative, | |
9271 | but in nonrelocatable files they are virtual | |
9272 | addresses. */ | |
9273 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 9274 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9275 | { |
9276 | sym.st_value += input_sec->output_section->vma; | |
9277 | if (h->type == STT_TLS) | |
9278 | { | |
8b127cbc | 9279 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
9280 | if (tls_sec != NULL) |
9281 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
9282 | } |
9283 | } | |
9284 | } | |
9285 | else | |
9286 | { | |
9287 | BFD_ASSERT (input_sec->owner == NULL | |
9288 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
9289 | sym.st_shndx = SHN_UNDEF; | |
9290 | input_sec = bfd_und_section_ptr; | |
9291 | } | |
9292 | } | |
9293 | break; | |
9294 | ||
9295 | case bfd_link_hash_common: | |
9296 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 9297 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
9298 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
9299 | break; | |
9300 | ||
9301 | case bfd_link_hash_indirect: | |
9302 | /* These symbols are created by symbol versioning. They point | |
9303 | to the decorated version of the name. For example, if the | |
9304 | symbol foo@@GNU_1.2 is the default, which should be used when | |
9305 | foo is used with no version, then we add an indirect symbol | |
9306 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
9307 | since the indirected symbol is already in the hash table. */ | |
9308 | return TRUE; | |
9309 | } | |
9310 | ||
b8871f35 L |
9311 | if (type == STT_COMMON || type == STT_OBJECT) |
9312 | switch (h->root.type) | |
9313 | { | |
9314 | case bfd_link_hash_common: | |
9315 | type = elf_link_convert_common_type (flinfo->info, type); | |
9316 | break; | |
9317 | case bfd_link_hash_defined: | |
9318 | case bfd_link_hash_defweak: | |
9319 | if (bed->common_definition (&sym)) | |
9320 | type = elf_link_convert_common_type (flinfo->info, type); | |
9321 | else | |
9322 | type = STT_OBJECT; | |
9323 | break; | |
9324 | case bfd_link_hash_undefined: | |
9325 | case bfd_link_hash_undefweak: | |
9326 | break; | |
9327 | default: | |
9328 | abort (); | |
9329 | } | |
9330 | ||
9331 | if (local_bind) | |
9332 | { | |
9333 | sym.st_info = ELF_ST_INFO (STB_LOCAL, type); | |
9334 | /* Turn off visibility on local symbol. */ | |
9335 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
9336 | } | |
9337 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ | |
9338 | else if (h->unique_global && h->def_regular) | |
9339 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, type); | |
9340 | else if (h->root.type == bfd_link_hash_undefweak | |
9341 | || h->root.type == bfd_link_hash_defweak) | |
9342 | sym.st_info = ELF_ST_INFO (STB_WEAK, type); | |
9343 | else | |
9344 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
9345 | sym.st_target_internal = h->target_internal; | |
9346 | ||
c152c796 AM |
9347 | /* Give the processor backend a chance to tweak the symbol value, |
9348 | and also to finish up anything that needs to be done for this | |
9349 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 9350 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 9351 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 9352 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 9353 | && h->def_regular |
0e1862bb | 9354 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
9355 | || ((h->dynindx != -1 |
9356 | || h->forced_local) | |
0e1862bb | 9357 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
9358 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
9359 | || h->root.type != bfd_link_hash_undefweak)) | |
9360 | || !h->forced_local) | |
8b127cbc | 9361 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
9362 | { |
9363 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 9364 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
9365 | { |
9366 | eoinfo->failed = TRUE; | |
9367 | return FALSE; | |
9368 | } | |
9369 | } | |
9370 | ||
9371 | /* If we are marking the symbol as undefined, and there are no | |
9372 | non-weak references to this symbol from a regular object, then | |
9373 | mark the symbol as weak undefined; if there are non-weak | |
9374 | references, mark the symbol as strong. We can't do this earlier, | |
9375 | because it might not be marked as undefined until the | |
9376 | finish_dynamic_symbol routine gets through with it. */ | |
9377 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 9378 | && h->ref_regular |
c152c796 AM |
9379 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
9380 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
9381 | { | |
9382 | int bindtype; | |
b8871f35 | 9383 | type = ELF_ST_TYPE (sym.st_info); |
2955ec4c L |
9384 | |
9385 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
9386 | if (type == STT_GNU_IFUNC) | |
9387 | type = STT_FUNC; | |
c152c796 | 9388 | |
f5385ebf | 9389 | if (h->ref_regular_nonweak) |
c152c796 AM |
9390 | bindtype = STB_GLOBAL; |
9391 | else | |
9392 | bindtype = STB_WEAK; | |
2955ec4c | 9393 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
9394 | } |
9395 | ||
bda987c2 CD |
9396 | /* If this is a symbol defined in a dynamic library, don't use the |
9397 | symbol size from the dynamic library. Relinking an executable | |
9398 | against a new library may introduce gratuitous changes in the | |
9399 | executable's symbols if we keep the size. */ | |
9400 | if (sym.st_shndx == SHN_UNDEF | |
9401 | && !h->def_regular | |
9402 | && h->def_dynamic) | |
9403 | sym.st_size = 0; | |
9404 | ||
c152c796 AM |
9405 | /* If a non-weak symbol with non-default visibility is not defined |
9406 | locally, it is a fatal error. */ | |
0e1862bb | 9407 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
9408 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
9409 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
9410 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 9411 | && !h->def_regular) |
c152c796 | 9412 | { |
17d078c5 AM |
9413 | const char *msg; |
9414 | ||
9415 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
9416 | msg = _("%B: protected symbol `%s' isn't defined"); | |
9417 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
9418 | msg = _("%B: internal symbol `%s' isn't defined"); | |
9419 | else | |
9420 | msg = _("%B: hidden symbol `%s' isn't defined"); | |
8b127cbc | 9421 | (*_bfd_error_handler) (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 9422 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9423 | eoinfo->failed = TRUE; |
9424 | return FALSE; | |
9425 | } | |
9426 | ||
9427 | /* If this symbol should be put in the .dynsym section, then put it | |
9428 | there now. We already know the symbol index. We also fill in | |
9429 | the entry in the .hash section. */ | |
cae1fbbb | 9430 | if (elf_hash_table (flinfo->info)->dynsym != NULL |
202e2356 | 9431 | && h->dynindx != -1 |
8b127cbc | 9432 | && elf_hash_table (flinfo->info)->dynamic_sections_created) |
c152c796 | 9433 | { |
c152c796 AM |
9434 | bfd_byte *esym; |
9435 | ||
90c984fc L |
9436 | /* Since there is no version information in the dynamic string, |
9437 | if there is no version info in symbol version section, we will | |
1659f720 | 9438 | have a run-time problem if not linking executable, referenced |
6e33951e L |
9439 | by shared library, not locally defined, or not bound locally. |
9440 | */ | |
1659f720 | 9441 | if (h->verinfo.verdef == NULL |
6e33951e | 9442 | && !local_bind |
0e1862bb | 9443 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
9444 | || h->ref_dynamic |
9445 | || !h->def_regular)) | |
90c984fc L |
9446 | { |
9447 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
9448 | ||
9449 | if (p && p [1] != '\0') | |
9450 | { | |
9451 | (*_bfd_error_handler) | |
9452 | (_("%B: No symbol version section for versioned symbol `%s'"), | |
9453 | flinfo->output_bfd, h->root.root.string); | |
9454 | eoinfo->failed = TRUE; | |
9455 | return FALSE; | |
9456 | } | |
9457 | } | |
9458 | ||
c152c796 | 9459 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
9460 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
9461 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 9462 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d L |
9463 | { |
9464 | eoinfo->failed = TRUE; | |
9465 | return FALSE; | |
9466 | } | |
8b127cbc | 9467 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 9468 | |
8b127cbc | 9469 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
9470 | { |
9471 | size_t hash_entry_size; | |
9472 | bfd_byte *bucketpos; | |
9473 | bfd_vma chain; | |
41198d0c L |
9474 | size_t bucketcount; |
9475 | size_t bucket; | |
9476 | ||
8b127cbc | 9477 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 9478 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
9479 | |
9480 | hash_entry_size | |
8b127cbc AM |
9481 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
9482 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 9483 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
9484 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
9485 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
9486 | bucketpos); | |
9487 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
9488 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
9489 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
9490 | } | |
c152c796 | 9491 | |
8b127cbc | 9492 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
9493 | { |
9494 | Elf_Internal_Versym iversym; | |
9495 | Elf_External_Versym *eversym; | |
9496 | ||
f5385ebf | 9497 | if (!h->def_regular) |
c152c796 | 9498 | { |
7b20f099 AM |
9499 | if (h->verinfo.verdef == NULL |
9500 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
9501 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
c152c796 AM |
9502 | iversym.vs_vers = 0; |
9503 | else | |
9504 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
9505 | } | |
9506 | else | |
9507 | { | |
9508 | if (h->verinfo.vertree == NULL) | |
9509 | iversym.vs_vers = 1; | |
9510 | else | |
9511 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 9512 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 9513 | iversym.vs_vers++; |
c152c796 AM |
9514 | } |
9515 | ||
422f1182 | 9516 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 9517 | defined locally. */ |
422f1182 | 9518 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
9519 | iversym.vs_vers |= VERSYM_HIDDEN; |
9520 | ||
8b127cbc | 9521 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 9522 | eversym += h->dynindx; |
8b127cbc | 9523 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
9524 | } |
9525 | } | |
9526 | ||
d983c8c5 AM |
9527 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
9528 | strip it from .symtab too. Obviously we can't do this for | |
9529 | relocatable output or when needed for --emit-relocs. */ | |
9530 | else if (input_sec == bfd_und_section_ptr | |
9531 | && h->indx != -2 | |
0e1862bb | 9532 | && !bfd_link_relocatable (flinfo->info)) |
d983c8c5 AM |
9533 | return TRUE; |
9534 | /* Also strip others that we couldn't earlier due to dynamic symbol | |
9535 | processing. */ | |
9536 | if (strip) | |
9537 | return TRUE; | |
9538 | if ((input_sec->flags & SEC_EXCLUDE) != 0) | |
c152c796 AM |
9539 | return TRUE; |
9540 | ||
2ec55de3 AM |
9541 | /* Output a FILE symbol so that following locals are not associated |
9542 | with the wrong input file. We need one for forced local symbols | |
9543 | if we've seen more than one FILE symbol or when we have exactly | |
9544 | one FILE symbol but global symbols are present in a file other | |
9545 | than the one with the FILE symbol. We also need one if linker | |
9546 | defined symbols are present. In practice these conditions are | |
9547 | always met, so just emit the FILE symbol unconditionally. */ | |
9548 | if (eoinfo->localsyms | |
9549 | && !eoinfo->file_sym_done | |
9550 | && eoinfo->flinfo->filesym_count != 0) | |
9551 | { | |
9552 | Elf_Internal_Sym fsym; | |
9553 | ||
9554 | memset (&fsym, 0, sizeof (fsym)); | |
9555 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9556 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9557 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
9558 | bfd_und_section_ptr, NULL)) | |
2ec55de3 AM |
9559 | return FALSE; |
9560 | ||
9561 | eoinfo->file_sym_done = TRUE; | |
9562 | } | |
9563 | ||
8b127cbc | 9564 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
9565 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
9566 | input_sec, h); | |
6e0b88f1 | 9567 | if (ret == 0) |
c152c796 AM |
9568 | { |
9569 | eoinfo->failed = TRUE; | |
9570 | return FALSE; | |
9571 | } | |
6e0b88f1 AM |
9572 | else if (ret == 1) |
9573 | h->indx = indx; | |
9574 | else if (h->indx == -2) | |
9575 | abort(); | |
c152c796 AM |
9576 | |
9577 | return TRUE; | |
9578 | } | |
9579 | ||
cdd3575c AM |
9580 | /* Return TRUE if special handling is done for relocs in SEC against |
9581 | symbols defined in discarded sections. */ | |
9582 | ||
c152c796 AM |
9583 | static bfd_boolean |
9584 | elf_section_ignore_discarded_relocs (asection *sec) | |
9585 | { | |
9586 | const struct elf_backend_data *bed; | |
9587 | ||
cdd3575c AM |
9588 | switch (sec->sec_info_type) |
9589 | { | |
dbaa2011 AM |
9590 | case SEC_INFO_TYPE_STABS: |
9591 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 9592 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
cdd3575c AM |
9593 | return TRUE; |
9594 | default: | |
9595 | break; | |
9596 | } | |
c152c796 AM |
9597 | |
9598 | bed = get_elf_backend_data (sec->owner); | |
9599 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9600 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9601 | return TRUE; | |
9602 | ||
9603 | return FALSE; | |
9604 | } | |
9605 | ||
9e66c942 AM |
9606 | /* Return a mask saying how ld should treat relocations in SEC against |
9607 | symbols defined in discarded sections. If this function returns | |
9608 | COMPLAIN set, ld will issue a warning message. If this function | |
9609 | returns PRETEND set, and the discarded section was link-once and the | |
9610 | same size as the kept link-once section, ld will pretend that the | |
9611 | symbol was actually defined in the kept section. Otherwise ld will | |
9612 | zero the reloc (at least that is the intent, but some cooperation by | |
9613 | the target dependent code is needed, particularly for REL targets). */ | |
9614 | ||
8a696751 AM |
9615 | unsigned int |
9616 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9617 | { |
9e66c942 | 9618 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9619 | return PRETEND; |
cdd3575c AM |
9620 | |
9621 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9622 | return 0; |
cdd3575c AM |
9623 | |
9624 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9625 | return 0; |
cdd3575c | 9626 | |
9e66c942 | 9627 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9628 | } |
9629 | ||
3d7f7666 L |
9630 | /* Find a match between a section and a member of a section group. */ |
9631 | ||
9632 | static asection * | |
c0f00686 L |
9633 | match_group_member (asection *sec, asection *group, |
9634 | struct bfd_link_info *info) | |
3d7f7666 L |
9635 | { |
9636 | asection *first = elf_next_in_group (group); | |
9637 | asection *s = first; | |
9638 | ||
9639 | while (s != NULL) | |
9640 | { | |
c0f00686 | 9641 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9642 | return s; |
9643 | ||
83180ade | 9644 | s = elf_next_in_group (s); |
3d7f7666 L |
9645 | if (s == first) |
9646 | break; | |
9647 | } | |
9648 | ||
9649 | return NULL; | |
9650 | } | |
9651 | ||
01b3c8ab | 9652 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9653 | to replace it. Return the replacement if it is OK. Otherwise return |
9654 | NULL. */ | |
01b3c8ab L |
9655 | |
9656 | asection * | |
c0f00686 | 9657 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9658 | { |
9659 | asection *kept; | |
9660 | ||
9661 | kept = sec->kept_section; | |
9662 | if (kept != NULL) | |
9663 | { | |
c2370991 | 9664 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9665 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9666 | if (kept != NULL |
9667 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9668 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9669 | kept = NULL; |
c2370991 | 9670 | sec->kept_section = kept; |
01b3c8ab L |
9671 | } |
9672 | return kept; | |
9673 | } | |
9674 | ||
c152c796 AM |
9675 | /* Link an input file into the linker output file. This function |
9676 | handles all the sections and relocations of the input file at once. | |
9677 | This is so that we only have to read the local symbols once, and | |
9678 | don't have to keep them in memory. */ | |
9679 | ||
9680 | static bfd_boolean | |
8b127cbc | 9681 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 9682 | { |
ece5ef60 | 9683 | int (*relocate_section) |
c152c796 AM |
9684 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9685 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9686 | bfd *output_bfd; | |
9687 | Elf_Internal_Shdr *symtab_hdr; | |
9688 | size_t locsymcount; | |
9689 | size_t extsymoff; | |
9690 | Elf_Internal_Sym *isymbuf; | |
9691 | Elf_Internal_Sym *isym; | |
9692 | Elf_Internal_Sym *isymend; | |
9693 | long *pindex; | |
9694 | asection **ppsection; | |
9695 | asection *o; | |
9696 | const struct elf_backend_data *bed; | |
c152c796 | 9697 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9698 | bfd_size_type address_size; |
9699 | bfd_vma r_type_mask; | |
9700 | int r_sym_shift; | |
ffbc01cc | 9701 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 9702 | |
8b127cbc | 9703 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
9704 | bed = get_elf_backend_data (output_bfd); |
9705 | relocate_section = bed->elf_backend_relocate_section; | |
9706 | ||
9707 | /* If this is a dynamic object, we don't want to do anything here: | |
9708 | we don't want the local symbols, and we don't want the section | |
9709 | contents. */ | |
9710 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9711 | return TRUE; | |
9712 | ||
c152c796 AM |
9713 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9714 | if (elf_bad_symtab (input_bfd)) | |
9715 | { | |
9716 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9717 | extsymoff = 0; | |
9718 | } | |
9719 | else | |
9720 | { | |
9721 | locsymcount = symtab_hdr->sh_info; | |
9722 | extsymoff = symtab_hdr->sh_info; | |
9723 | } | |
9724 | ||
9725 | /* Read the local symbols. */ | |
9726 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9727 | if (isymbuf == NULL && locsymcount != 0) | |
9728 | { | |
9729 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
9730 | flinfo->internal_syms, |
9731 | flinfo->external_syms, | |
9732 | flinfo->locsym_shndx); | |
c152c796 AM |
9733 | if (isymbuf == NULL) |
9734 | return FALSE; | |
9735 | } | |
9736 | ||
9737 | /* Find local symbol sections and adjust values of symbols in | |
9738 | SEC_MERGE sections. Write out those local symbols we know are | |
9739 | going into the output file. */ | |
9740 | isymend = isymbuf + locsymcount; | |
8b127cbc | 9741 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
9742 | isym < isymend; |
9743 | isym++, pindex++, ppsection++) | |
9744 | { | |
9745 | asection *isec; | |
9746 | const char *name; | |
9747 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9748 | long indx; |
9749 | int ret; | |
c152c796 AM |
9750 | |
9751 | *pindex = -1; | |
9752 | ||
9753 | if (elf_bad_symtab (input_bfd)) | |
9754 | { | |
9755 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9756 | { | |
9757 | *ppsection = NULL; | |
9758 | continue; | |
9759 | } | |
9760 | } | |
9761 | ||
9762 | if (isym->st_shndx == SHN_UNDEF) | |
9763 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9764 | else if (isym->st_shndx == SHN_ABS) |
9765 | isec = bfd_abs_section_ptr; | |
9766 | else if (isym->st_shndx == SHN_COMMON) | |
9767 | isec = bfd_com_section_ptr; | |
9768 | else | |
9769 | { | |
cb33740c AM |
9770 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9771 | if (isec == NULL) | |
9772 | { | |
9773 | /* Don't attempt to output symbols with st_shnx in the | |
9774 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9775 | *ppsection = NULL; | |
9776 | continue; | |
9777 | } | |
dbaa2011 | 9778 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
9779 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
9780 | isym->st_value = | |
9781 | _bfd_merged_section_offset (output_bfd, &isec, | |
9782 | elf_section_data (isec)->sec_info, | |
9783 | isym->st_value); | |
c152c796 AM |
9784 | } |
9785 | ||
9786 | *ppsection = isec; | |
9787 | ||
d983c8c5 AM |
9788 | /* Don't output the first, undefined, symbol. In fact, don't |
9789 | output any undefined local symbol. */ | |
9790 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
9791 | continue; |
9792 | ||
9793 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
9794 | { | |
9795 | /* We never output section symbols. Instead, we use the | |
9796 | section symbol of the corresponding section in the output | |
9797 | file. */ | |
9798 | continue; | |
9799 | } | |
9800 | ||
9801 | /* If we are stripping all symbols, we don't want to output this | |
9802 | one. */ | |
8b127cbc | 9803 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
9804 | continue; |
9805 | ||
9806 | /* If we are discarding all local symbols, we don't want to | |
9807 | output this one. If we are generating a relocatable output | |
9808 | file, then some of the local symbols may be required by | |
9809 | relocs; we output them below as we discover that they are | |
9810 | needed. */ | |
8b127cbc | 9811 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
9812 | continue; |
9813 | ||
9814 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
9815 | discarding, we don't need to keep it. */ |
9816 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
9817 | && isym->st_shndx < SHN_LORESERVE |
9818 | && bfd_section_removed_from_list (output_bfd, | |
9819 | isec->output_section)) | |
e75a280b L |
9820 | continue; |
9821 | ||
c152c796 AM |
9822 | /* Get the name of the symbol. */ |
9823 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
9824 | isym->st_name); | |
9825 | if (name == NULL) | |
9826 | return FALSE; | |
9827 | ||
9828 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
9829 | if ((flinfo->info->strip == strip_some |
9830 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 9831 | == NULL)) |
8b127cbc | 9832 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
9833 | && (isec->flags & SEC_MERGE) |
9834 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 9835 | || flinfo->info->discard == discard_l) |
c152c796 AM |
9836 | && bfd_is_local_label_name (input_bfd, name))) |
9837 | continue; | |
9838 | ||
ffbc01cc AM |
9839 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
9840 | { | |
ce875075 AM |
9841 | if (input_bfd->lto_output) |
9842 | /* -flto puts a temp file name here. This means builds | |
9843 | are not reproducible. Discard the symbol. */ | |
9844 | continue; | |
ffbc01cc AM |
9845 | have_file_sym = TRUE; |
9846 | flinfo->filesym_count += 1; | |
9847 | } | |
9848 | if (!have_file_sym) | |
9849 | { | |
9850 | /* In the absence of debug info, bfd_find_nearest_line uses | |
9851 | FILE symbols to determine the source file for local | |
9852 | function symbols. Provide a FILE symbol here if input | |
9853 | files lack such, so that their symbols won't be | |
9854 | associated with a previous input file. It's not the | |
9855 | source file, but the best we can do. */ | |
9856 | have_file_sym = TRUE; | |
9857 | flinfo->filesym_count += 1; | |
9858 | memset (&osym, 0, sizeof (osym)); | |
9859 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9860 | osym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9861 | if (!elf_link_output_symstrtab (flinfo, |
9862 | (input_bfd->lto_output ? NULL | |
9863 | : input_bfd->filename), | |
9864 | &osym, bfd_abs_section_ptr, | |
9865 | NULL)) | |
ffbc01cc AM |
9866 | return FALSE; |
9867 | } | |
9868 | ||
c152c796 AM |
9869 | osym = *isym; |
9870 | ||
9871 | /* Adjust the section index for the output file. */ | |
9872 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9873 | isec->output_section); | |
9874 | if (osym.st_shndx == SHN_BAD) | |
9875 | return FALSE; | |
9876 | ||
c152c796 AM |
9877 | /* ELF symbols in relocatable files are section relative, but |
9878 | in executable files they are virtual addresses. Note that | |
9879 | this code assumes that all ELF sections have an associated | |
9880 | BFD section with a reasonable value for output_offset; below | |
9881 | we assume that they also have a reasonable value for | |
9882 | output_section. Any special sections must be set up to meet | |
9883 | these requirements. */ | |
9884 | osym.st_value += isec->output_offset; | |
0e1862bb | 9885 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9886 | { |
9887 | osym.st_value += isec->output_section->vma; | |
9888 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
9889 | { | |
9890 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
8b127cbc AM |
9891 | BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL); |
9892 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
c152c796 AM |
9893 | } |
9894 | } | |
9895 | ||
6e0b88f1 | 9896 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 9897 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 9898 | if (ret == 0) |
c152c796 | 9899 | return FALSE; |
6e0b88f1 AM |
9900 | else if (ret == 1) |
9901 | *pindex = indx; | |
c152c796 AM |
9902 | } |
9903 | ||
310fd250 L |
9904 | if (bed->s->arch_size == 32) |
9905 | { | |
9906 | r_type_mask = 0xff; | |
9907 | r_sym_shift = 8; | |
9908 | address_size = 4; | |
9909 | } | |
9910 | else | |
9911 | { | |
9912 | r_type_mask = 0xffffffff; | |
9913 | r_sym_shift = 32; | |
9914 | address_size = 8; | |
9915 | } | |
9916 | ||
c152c796 AM |
9917 | /* Relocate the contents of each section. */ |
9918 | sym_hashes = elf_sym_hashes (input_bfd); | |
9919 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
9920 | { | |
9921 | bfd_byte *contents; | |
9922 | ||
9923 | if (! o->linker_mark) | |
9924 | { | |
9925 | /* This section was omitted from the link. */ | |
9926 | continue; | |
9927 | } | |
9928 | ||
0e1862bb | 9929 | if (bfd_link_relocatable (flinfo->info) |
bcacc0f5 AM |
9930 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
9931 | { | |
9932 | /* Deal with the group signature symbol. */ | |
9933 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
9934 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
9935 | asection *osec = o->output_section; | |
9936 | ||
9937 | if (symndx >= locsymcount | |
9938 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 9939 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
9940 | { |
9941 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
9942 | while (h->root.type == bfd_link_hash_indirect | |
9943 | || h->root.type == bfd_link_hash_warning) | |
9944 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9945 | /* Arrange for symbol to be output. */ | |
9946 | h->indx = -2; | |
9947 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
9948 | } | |
9949 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
9950 | { | |
9951 | /* We'll use the output section target_index. */ | |
8b127cbc | 9952 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
9953 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
9954 | } | |
9955 | else | |
9956 | { | |
8b127cbc | 9957 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
9958 | { |
9959 | /* Otherwise output the local symbol now. */ | |
9960 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 9961 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 9962 | const char *name; |
6e0b88f1 AM |
9963 | long indx; |
9964 | int ret; | |
bcacc0f5 AM |
9965 | |
9966 | name = bfd_elf_string_from_elf_section (input_bfd, | |
9967 | symtab_hdr->sh_link, | |
9968 | sym.st_name); | |
9969 | if (name == NULL) | |
9970 | return FALSE; | |
9971 | ||
9972 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9973 | sec); | |
9974 | if (sym.st_shndx == SHN_BAD) | |
9975 | return FALSE; | |
9976 | ||
9977 | sym.st_value += o->output_offset; | |
9978 | ||
6e0b88f1 | 9979 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
9980 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
9981 | NULL); | |
6e0b88f1 | 9982 | if (ret == 0) |
bcacc0f5 | 9983 | return FALSE; |
6e0b88f1 | 9984 | else if (ret == 1) |
8b127cbc | 9985 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
9986 | else |
9987 | abort (); | |
bcacc0f5 AM |
9988 | } |
9989 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 9990 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
9991 | } |
9992 | } | |
9993 | ||
c152c796 | 9994 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 9995 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
9996 | continue; |
9997 | ||
9998 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
9999 | { | |
10000 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
10001 | or somesuch. */ | |
10002 | continue; | |
10003 | } | |
10004 | ||
10005 | /* Get the contents of the section. They have been cached by a | |
10006 | relaxation routine. Note that o is a section in an input | |
10007 | file, so the contents field will not have been set by any of | |
10008 | the routines which work on output files. */ | |
10009 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
10010 | { |
10011 | contents = elf_section_data (o)->this_hdr.contents; | |
10012 | if (bed->caches_rawsize | |
10013 | && o->rawsize != 0 | |
10014 | && o->rawsize < o->size) | |
10015 | { | |
10016 | memcpy (flinfo->contents, contents, o->rawsize); | |
10017 | contents = flinfo->contents; | |
10018 | } | |
10019 | } | |
c152c796 AM |
10020 | else |
10021 | { | |
8b127cbc | 10022 | contents = flinfo->contents; |
4a114e3e | 10023 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
10024 | return FALSE; |
10025 | } | |
10026 | ||
10027 | if ((o->flags & SEC_RELOC) != 0) | |
10028 | { | |
10029 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 10030 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 10031 | int action_discarded; |
ece5ef60 | 10032 | int ret; |
c152c796 AM |
10033 | |
10034 | /* Get the swapped relocs. */ | |
10035 | internal_relocs | |
8b127cbc AM |
10036 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
10037 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
10038 | if (internal_relocs == NULL |
10039 | && o->reloc_count > 0) | |
10040 | return FALSE; | |
10041 | ||
310fd250 L |
10042 | /* We need to reverse-copy input .ctors/.dtors sections if |
10043 | they are placed in .init_array/.finit_array for output. */ | |
10044 | if (o->size > address_size | |
10045 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
10046 | && strcmp (o->output_section->name, | |
10047 | ".init_array") == 0) | |
10048 | || (strncmp (o->name, ".dtors", 6) == 0 | |
10049 | && strcmp (o->output_section->name, | |
10050 | ".fini_array") == 0)) | |
10051 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 10052 | { |
310fd250 L |
10053 | if (o->size != o->reloc_count * address_size) |
10054 | { | |
10055 | (*_bfd_error_handler) | |
10056 | (_("error: %B: size of section %A is not " | |
10057 | "multiple of address size"), | |
10058 | input_bfd, o); | |
10059 | bfd_set_error (bfd_error_on_input); | |
10060 | return FALSE; | |
10061 | } | |
10062 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
10063 | } |
10064 | ||
0f02bbd9 | 10065 | action_discarded = -1; |
c152c796 | 10066 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
10067 | action_discarded = (*bed->action_discarded) (o); |
10068 | ||
10069 | /* Run through the relocs evaluating complex reloc symbols and | |
10070 | looking for relocs against symbols from discarded sections | |
10071 | or section symbols from removed link-once sections. | |
10072 | Complain about relocs against discarded sections. Zero | |
10073 | relocs against removed link-once sections. */ | |
10074 | ||
10075 | rel = internal_relocs; | |
10076 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
10077 | for ( ; rel < relend; rel++) | |
c152c796 | 10078 | { |
0f02bbd9 AM |
10079 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
10080 | unsigned int s_type; | |
10081 | asection **ps, *sec; | |
10082 | struct elf_link_hash_entry *h = NULL; | |
10083 | const char *sym_name; | |
c152c796 | 10084 | |
0f02bbd9 AM |
10085 | if (r_symndx == STN_UNDEF) |
10086 | continue; | |
c152c796 | 10087 | |
0f02bbd9 AM |
10088 | if (r_symndx >= locsymcount |
10089 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10090 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
10091 | { |
10092 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 10093 | |
0f02bbd9 AM |
10094 | /* Badly formatted input files can contain relocs that |
10095 | reference non-existant symbols. Check here so that | |
10096 | we do not seg fault. */ | |
10097 | if (h == NULL) | |
c152c796 | 10098 | { |
0f02bbd9 | 10099 | char buffer [32]; |
dce669a1 | 10100 | |
0f02bbd9 AM |
10101 | sprintf_vma (buffer, rel->r_info); |
10102 | (*_bfd_error_handler) | |
10103 | (_("error: %B contains a reloc (0x%s) for section %A " | |
10104 | "that references a non-existent global symbol"), | |
10105 | input_bfd, o, buffer); | |
10106 | bfd_set_error (bfd_error_bad_value); | |
10107 | return FALSE; | |
10108 | } | |
3b36f7e6 | 10109 | |
0f02bbd9 AM |
10110 | while (h->root.type == bfd_link_hash_indirect |
10111 | || h->root.type == bfd_link_hash_warning) | |
10112 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 10113 | |
0f02bbd9 | 10114 | s_type = h->type; |
cdd3575c | 10115 | |
9e2dec47 | 10116 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
10117 | mark the symbol as undefined. Note that the |
10118 | linker may attach linker created dynamic sections | |
10119 | to the plugin bfd. Symbols defined in linker | |
10120 | created sections are not plugin symbols. */ | |
9e2dec47 L |
10121 | if (h->root.non_ir_ref |
10122 | && (h->root.type == bfd_link_hash_defined | |
10123 | || h->root.type == bfd_link_hash_defweak) | |
10124 | && (h->root.u.def.section->flags | |
10125 | & SEC_LINKER_CREATED) == 0 | |
10126 | && h->root.u.def.section->owner != NULL | |
10127 | && (h->root.u.def.section->owner->flags | |
10128 | & BFD_PLUGIN) != 0) | |
10129 | { | |
10130 | h->root.type = bfd_link_hash_undefined; | |
10131 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
10132 | } | |
10133 | ||
0f02bbd9 AM |
10134 | ps = NULL; |
10135 | if (h->root.type == bfd_link_hash_defined | |
10136 | || h->root.type == bfd_link_hash_defweak) | |
10137 | ps = &h->root.u.def.section; | |
10138 | ||
10139 | sym_name = h->root.root.string; | |
10140 | } | |
10141 | else | |
10142 | { | |
10143 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
10144 | ||
10145 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 10146 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
10147 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
10148 | sym, *ps); | |
10149 | } | |
c152c796 | 10150 | |
c301e700 | 10151 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 10152 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
10153 | { |
10154 | bfd_vma val; | |
10155 | bfd_vma dot = (rel->r_offset | |
10156 | + o->output_offset + o->output_section->vma); | |
10157 | #ifdef DEBUG | |
10158 | printf ("Encountered a complex symbol!"); | |
10159 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
10160 | input_bfd->filename, o->name, |
10161 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
10162 | printf (" symbol: idx %8.8lx, name %s\n", |
10163 | r_symndx, sym_name); | |
10164 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
10165 | (unsigned long) rel->r_info, | |
10166 | (unsigned long) rel->r_offset); | |
10167 | #endif | |
8b127cbc | 10168 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
10169 | isymbuf, locsymcount, s_type == STT_SRELC)) |
10170 | return FALSE; | |
10171 | ||
10172 | /* Symbol evaluated OK. Update to absolute value. */ | |
10173 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
10174 | r_symndx, val); | |
10175 | continue; | |
10176 | } | |
10177 | ||
10178 | if (action_discarded != -1 && ps != NULL) | |
10179 | { | |
cdd3575c AM |
10180 | /* Complain if the definition comes from a |
10181 | discarded section. */ | |
dbaa2011 | 10182 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 10183 | { |
cf35638d | 10184 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 10185 | if (action_discarded & COMPLAIN) |
8b127cbc | 10186 | (*flinfo->info->callbacks->einfo) |
e1fffbe6 | 10187 | (_("%X`%s' referenced in section `%A' of %B: " |
58ac56d0 | 10188 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 10189 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 10190 | |
87e5235d | 10191 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 10192 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
10193 | really defined in the kept linkonce section. |
10194 | FIXME: This is quite broken. Modifying the | |
10195 | symbol here means we will be changing all later | |
e0ae6d6f | 10196 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 10197 | if (action_discarded & PRETEND) |
87e5235d | 10198 | { |
01b3c8ab L |
10199 | asection *kept; |
10200 | ||
c0f00686 | 10201 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 10202 | flinfo->info); |
01b3c8ab | 10203 | if (kept != NULL) |
87e5235d AM |
10204 | { |
10205 | *ps = kept; | |
10206 | continue; | |
10207 | } | |
10208 | } | |
c152c796 AM |
10209 | } |
10210 | } | |
10211 | } | |
10212 | ||
10213 | /* Relocate the section by invoking a back end routine. | |
10214 | ||
10215 | The back end routine is responsible for adjusting the | |
10216 | section contents as necessary, and (if using Rela relocs | |
10217 | and generating a relocatable output file) adjusting the | |
10218 | reloc addend as necessary. | |
10219 | ||
10220 | The back end routine does not have to worry about setting | |
10221 | the reloc address or the reloc symbol index. | |
10222 | ||
10223 | The back end routine is given a pointer to the swapped in | |
10224 | internal symbols, and can access the hash table entries | |
10225 | for the external symbols via elf_sym_hashes (input_bfd). | |
10226 | ||
10227 | When generating relocatable output, the back end routine | |
10228 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
10229 | output symbol is going to be a section symbol | |
10230 | corresponding to the output section, which will require | |
10231 | the addend to be adjusted. */ | |
10232 | ||
8b127cbc | 10233 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
10234 | input_bfd, o, contents, |
10235 | internal_relocs, | |
10236 | isymbuf, | |
8b127cbc | 10237 | flinfo->sections); |
ece5ef60 | 10238 | if (!ret) |
c152c796 AM |
10239 | return FALSE; |
10240 | ||
ece5ef60 | 10241 | if (ret == 2 |
0e1862bb | 10242 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 10243 | || flinfo->info->emitrelocations) |
c152c796 AM |
10244 | { |
10245 | Elf_Internal_Rela *irela; | |
d4730f92 | 10246 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
10247 | bfd_vma last_offset; |
10248 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
10249 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
10250 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 10251 | unsigned int next_erel; |
c152c796 | 10252 | bfd_boolean rela_normal; |
d4730f92 | 10253 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 10254 | |
d4730f92 BS |
10255 | esdi = elf_section_data (o); |
10256 | esdo = elf_section_data (o->output_section); | |
10257 | rela_normal = FALSE; | |
c152c796 AM |
10258 | |
10259 | /* Adjust the reloc addresses and symbol indices. */ | |
10260 | ||
10261 | irela = internal_relocs; | |
10262 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
10263 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
10264 | /* We start processing the REL relocs, if any. When we reach | |
10265 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
10266 | irelamid = irela; | |
10267 | if (esdi->rel.hdr != NULL) | |
10268 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
10269 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10270 | rel_hash_list = rel_hash; |
d4730f92 | 10271 | rela_hash_list = NULL; |
c152c796 | 10272 | last_offset = o->output_offset; |
0e1862bb | 10273 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10274 | last_offset += o->output_section->vma; |
10275 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
10276 | { | |
10277 | unsigned long r_symndx; | |
10278 | asection *sec; | |
10279 | Elf_Internal_Sym sym; | |
10280 | ||
10281 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
10282 | { | |
10283 | rel_hash++; | |
10284 | next_erel = 0; | |
10285 | } | |
10286 | ||
d4730f92 BS |
10287 | if (irela == irelamid) |
10288 | { | |
10289 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
10290 | rela_hash_list = rel_hash; | |
10291 | rela_normal = bed->rela_normal; | |
10292 | } | |
10293 | ||
c152c796 | 10294 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 10295 | flinfo->info, o, |
c152c796 AM |
10296 | irela->r_offset); |
10297 | if (irela->r_offset >= (bfd_vma) -2) | |
10298 | { | |
10299 | /* This is a reloc for a deleted entry or somesuch. | |
10300 | Turn it into an R_*_NONE reloc, at the same | |
10301 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 10302 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
10303 | being ordered. */ |
10304 | irela->r_offset = last_offset; | |
10305 | irela->r_info = 0; | |
10306 | irela->r_addend = 0; | |
10307 | continue; | |
10308 | } | |
10309 | ||
10310 | irela->r_offset += o->output_offset; | |
10311 | ||
10312 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 10313 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10314 | irela->r_offset += o->output_section->vma; |
10315 | ||
10316 | last_offset = irela->r_offset; | |
10317 | ||
10318 | r_symndx = irela->r_info >> r_sym_shift; | |
10319 | if (r_symndx == STN_UNDEF) | |
10320 | continue; | |
10321 | ||
10322 | if (r_symndx >= locsymcount | |
10323 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10324 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
10325 | { |
10326 | struct elf_link_hash_entry *rh; | |
10327 | unsigned long indx; | |
10328 | ||
10329 | /* This is a reloc against a global symbol. We | |
10330 | have not yet output all the local symbols, so | |
10331 | we do not know the symbol index of any global | |
10332 | symbol. We set the rel_hash entry for this | |
10333 | reloc to point to the global hash table entry | |
10334 | for this symbol. The symbol index is then | |
ee75fd95 | 10335 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
10336 | indx = r_symndx - extsymoff; |
10337 | rh = elf_sym_hashes (input_bfd)[indx]; | |
10338 | while (rh->root.type == bfd_link_hash_indirect | |
10339 | || rh->root.type == bfd_link_hash_warning) | |
10340 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
10341 | ||
10342 | /* Setting the index to -2 tells | |
10343 | elf_link_output_extsym that this symbol is | |
10344 | used by a reloc. */ | |
10345 | BFD_ASSERT (rh->indx < 0); | |
10346 | rh->indx = -2; | |
10347 | ||
10348 | *rel_hash = rh; | |
10349 | ||
10350 | continue; | |
10351 | } | |
10352 | ||
10353 | /* This is a reloc against a local symbol. */ | |
10354 | ||
10355 | *rel_hash = NULL; | |
10356 | sym = isymbuf[r_symndx]; | |
8b127cbc | 10357 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
10358 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
10359 | { | |
10360 | /* I suppose the backend ought to fill in the | |
10361 | section of any STT_SECTION symbol against a | |
6a8d1586 | 10362 | processor specific section. */ |
cf35638d | 10363 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
10364 | if (bfd_is_abs_section (sec)) |
10365 | ; | |
c152c796 AM |
10366 | else if (sec == NULL || sec->owner == NULL) |
10367 | { | |
10368 | bfd_set_error (bfd_error_bad_value); | |
10369 | return FALSE; | |
10370 | } | |
10371 | else | |
10372 | { | |
6a8d1586 AM |
10373 | asection *osec = sec->output_section; |
10374 | ||
10375 | /* If we have discarded a section, the output | |
10376 | section will be the absolute section. In | |
ab96bf03 AM |
10377 | case of discarded SEC_MERGE sections, use |
10378 | the kept section. relocate_section should | |
10379 | have already handled discarded linkonce | |
10380 | sections. */ | |
6a8d1586 AM |
10381 | if (bfd_is_abs_section (osec) |
10382 | && sec->kept_section != NULL | |
10383 | && sec->kept_section->output_section != NULL) | |
10384 | { | |
10385 | osec = sec->kept_section->output_section; | |
10386 | irela->r_addend -= osec->vma; | |
10387 | } | |
10388 | ||
10389 | if (!bfd_is_abs_section (osec)) | |
10390 | { | |
10391 | r_symndx = osec->target_index; | |
cf35638d | 10392 | if (r_symndx == STN_UNDEF) |
74541ad4 | 10393 | { |
051d833a AM |
10394 | irela->r_addend += osec->vma; |
10395 | osec = _bfd_nearby_section (output_bfd, osec, | |
10396 | osec->vma); | |
10397 | irela->r_addend -= osec->vma; | |
10398 | r_symndx = osec->target_index; | |
74541ad4 | 10399 | } |
6a8d1586 | 10400 | } |
c152c796 AM |
10401 | } |
10402 | ||
10403 | /* Adjust the addend according to where the | |
10404 | section winds up in the output section. */ | |
10405 | if (rela_normal) | |
10406 | irela->r_addend += sec->output_offset; | |
10407 | } | |
10408 | else | |
10409 | { | |
8b127cbc | 10410 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
10411 | { |
10412 | unsigned long shlink; | |
10413 | const char *name; | |
10414 | asection *osec; | |
6e0b88f1 | 10415 | long indx; |
c152c796 | 10416 | |
8b127cbc | 10417 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10418 | { |
10419 | /* You can't do ld -r -s. */ | |
10420 | bfd_set_error (bfd_error_invalid_operation); | |
10421 | return FALSE; | |
10422 | } | |
10423 | ||
10424 | /* This symbol was skipped earlier, but | |
10425 | since it is needed by a reloc, we | |
10426 | must output it now. */ | |
10427 | shlink = symtab_hdr->sh_link; | |
10428 | name = (bfd_elf_string_from_elf_section | |
10429 | (input_bfd, shlink, sym.st_name)); | |
10430 | if (name == NULL) | |
10431 | return FALSE; | |
10432 | ||
10433 | osec = sec->output_section; | |
10434 | sym.st_shndx = | |
10435 | _bfd_elf_section_from_bfd_section (output_bfd, | |
10436 | osec); | |
10437 | if (sym.st_shndx == SHN_BAD) | |
10438 | return FALSE; | |
10439 | ||
10440 | sym.st_value += sec->output_offset; | |
0e1862bb | 10441 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10442 | { |
10443 | sym.st_value += osec->vma; | |
10444 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
10445 | { | |
10446 | /* STT_TLS symbols are relative to PT_TLS | |
10447 | segment base. */ | |
8b127cbc | 10448 | BFD_ASSERT (elf_hash_table (flinfo->info) |
c152c796 | 10449 | ->tls_sec != NULL); |
8b127cbc | 10450 | sym.st_value -= (elf_hash_table (flinfo->info) |
c152c796 AM |
10451 | ->tls_sec->vma); |
10452 | } | |
10453 | } | |
10454 | ||
6e0b88f1 | 10455 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10456 | ret = elf_link_output_symstrtab (flinfo, name, |
10457 | &sym, sec, | |
10458 | NULL); | |
6e0b88f1 | 10459 | if (ret == 0) |
c152c796 | 10460 | return FALSE; |
6e0b88f1 | 10461 | else if (ret == 1) |
8b127cbc | 10462 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
10463 | else |
10464 | abort (); | |
c152c796 AM |
10465 | } |
10466 | ||
8b127cbc | 10467 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
10468 | } |
10469 | ||
10470 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
10471 | | (irela->r_info & r_type_mask)); | |
10472 | } | |
10473 | ||
10474 | /* Swap out the relocs. */ | |
d4730f92 BS |
10475 | input_rel_hdr = esdi->rel.hdr; |
10476 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 10477 | { |
d4730f92 BS |
10478 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
10479 | input_rel_hdr, | |
10480 | internal_relocs, | |
10481 | rel_hash_list)) | |
10482 | return FALSE; | |
c152c796 AM |
10483 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
10484 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10485 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
10486 | } |
10487 | ||
10488 | input_rela_hdr = esdi->rela.hdr; | |
10489 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
10490 | { | |
eac338cf | 10491 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 10492 | input_rela_hdr, |
eac338cf | 10493 | internal_relocs, |
d4730f92 | 10494 | rela_hash_list)) |
c152c796 AM |
10495 | return FALSE; |
10496 | } | |
10497 | } | |
10498 | } | |
10499 | ||
10500 | /* Write out the modified section contents. */ | |
10501 | if (bed->elf_backend_write_section | |
8b127cbc | 10502 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 10503 | contents)) |
c152c796 AM |
10504 | { |
10505 | /* Section written out. */ | |
10506 | } | |
10507 | else switch (o->sec_info_type) | |
10508 | { | |
dbaa2011 | 10509 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
10510 | if (! (_bfd_write_section_stabs |
10511 | (output_bfd, | |
8b127cbc | 10512 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
10513 | o, &elf_section_data (o)->sec_info, contents))) |
10514 | return FALSE; | |
10515 | break; | |
dbaa2011 | 10516 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
10517 | if (! _bfd_write_merged_section (output_bfd, o, |
10518 | elf_section_data (o)->sec_info)) | |
10519 | return FALSE; | |
10520 | break; | |
dbaa2011 | 10521 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 10522 | { |
8b127cbc | 10523 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
10524 | o, contents)) |
10525 | return FALSE; | |
10526 | } | |
10527 | break; | |
2f0c68f2 CM |
10528 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
10529 | { | |
10530 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
10531 | flinfo->info, | |
10532 | o, contents)) | |
10533 | return FALSE; | |
10534 | } | |
10535 | break; | |
c152c796 AM |
10536 | default: |
10537 | { | |
5dabe785 | 10538 | /* FIXME: octets_per_byte. */ |
310fd250 L |
10539 | if (! (o->flags & SEC_EXCLUDE)) |
10540 | { | |
10541 | file_ptr offset = (file_ptr) o->output_offset; | |
10542 | bfd_size_type todo = o->size; | |
10543 | if ((o->flags & SEC_ELF_REVERSE_COPY)) | |
10544 | { | |
10545 | /* Reverse-copy input section to output. */ | |
10546 | do | |
10547 | { | |
10548 | todo -= address_size; | |
10549 | if (! bfd_set_section_contents (output_bfd, | |
10550 | o->output_section, | |
10551 | contents + todo, | |
10552 | offset, | |
10553 | address_size)) | |
10554 | return FALSE; | |
10555 | if (todo == 0) | |
10556 | break; | |
10557 | offset += address_size; | |
10558 | } | |
10559 | while (1); | |
10560 | } | |
10561 | else if (! bfd_set_section_contents (output_bfd, | |
10562 | o->output_section, | |
10563 | contents, | |
10564 | offset, todo)) | |
10565 | return FALSE; | |
10566 | } | |
c152c796 AM |
10567 | } |
10568 | break; | |
10569 | } | |
10570 | } | |
10571 | ||
10572 | return TRUE; | |
10573 | } | |
10574 | ||
10575 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 10576 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
10577 | is used to build constructor and destructor tables when linking |
10578 | with -Ur. */ | |
10579 | ||
10580 | static bfd_boolean | |
10581 | elf_reloc_link_order (bfd *output_bfd, | |
10582 | struct bfd_link_info *info, | |
10583 | asection *output_section, | |
10584 | struct bfd_link_order *link_order) | |
10585 | { | |
10586 | reloc_howto_type *howto; | |
10587 | long indx; | |
10588 | bfd_vma offset; | |
10589 | bfd_vma addend; | |
d4730f92 | 10590 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
10591 | struct elf_link_hash_entry **rel_hash_ptr; |
10592 | Elf_Internal_Shdr *rel_hdr; | |
10593 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
10594 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
10595 | bfd_byte *erel; | |
10596 | unsigned int i; | |
d4730f92 | 10597 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
10598 | |
10599 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
10600 | if (howto == NULL) | |
10601 | { | |
10602 | bfd_set_error (bfd_error_bad_value); | |
10603 | return FALSE; | |
10604 | } | |
10605 | ||
10606 | addend = link_order->u.reloc.p->addend; | |
10607 | ||
d4730f92 BS |
10608 | if (esdo->rel.hdr) |
10609 | reldata = &esdo->rel; | |
10610 | else if (esdo->rela.hdr) | |
10611 | reldata = &esdo->rela; | |
10612 | else | |
10613 | { | |
10614 | reldata = NULL; | |
10615 | BFD_ASSERT (0); | |
10616 | } | |
10617 | ||
c152c796 | 10618 | /* Figure out the symbol index. */ |
d4730f92 | 10619 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
10620 | if (link_order->type == bfd_section_reloc_link_order) |
10621 | { | |
10622 | indx = link_order->u.reloc.p->u.section->target_index; | |
10623 | BFD_ASSERT (indx != 0); | |
10624 | *rel_hash_ptr = NULL; | |
10625 | } | |
10626 | else | |
10627 | { | |
10628 | struct elf_link_hash_entry *h; | |
10629 | ||
10630 | /* Treat a reloc against a defined symbol as though it were | |
10631 | actually against the section. */ | |
10632 | h = ((struct elf_link_hash_entry *) | |
10633 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10634 | link_order->u.reloc.p->u.name, | |
10635 | FALSE, FALSE, TRUE)); | |
10636 | if (h != NULL | |
10637 | && (h->root.type == bfd_link_hash_defined | |
10638 | || h->root.type == bfd_link_hash_defweak)) | |
10639 | { | |
10640 | asection *section; | |
10641 | ||
10642 | section = h->root.u.def.section; | |
10643 | indx = section->output_section->target_index; | |
10644 | *rel_hash_ptr = NULL; | |
10645 | /* It seems that we ought to add the symbol value to the | |
10646 | addend here, but in practice it has already been added | |
10647 | because it was passed to constructor_callback. */ | |
10648 | addend += section->output_section->vma + section->output_offset; | |
10649 | } | |
10650 | else if (h != NULL) | |
10651 | { | |
10652 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10653 | this symbol is used by a reloc. */ | |
10654 | h->indx = -2; | |
10655 | *rel_hash_ptr = h; | |
10656 | indx = 0; | |
10657 | } | |
10658 | else | |
10659 | { | |
10660 | if (! ((*info->callbacks->unattached_reloc) | |
10661 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) | |
10662 | return FALSE; | |
10663 | indx = 0; | |
10664 | } | |
10665 | } | |
10666 | ||
10667 | /* If this is an inplace reloc, we must write the addend into the | |
10668 | object file. */ | |
10669 | if (howto->partial_inplace && addend != 0) | |
10670 | { | |
10671 | bfd_size_type size; | |
10672 | bfd_reloc_status_type rstat; | |
10673 | bfd_byte *buf; | |
10674 | bfd_boolean ok; | |
10675 | const char *sym_name; | |
10676 | ||
a50b1753 NC |
10677 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10678 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 10679 | if (buf == NULL && size != 0) |
c152c796 AM |
10680 | return FALSE; |
10681 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10682 | switch (rstat) | |
10683 | { | |
10684 | case bfd_reloc_ok: | |
10685 | break; | |
10686 | ||
10687 | default: | |
10688 | case bfd_reloc_outofrange: | |
10689 | abort (); | |
10690 | ||
10691 | case bfd_reloc_overflow: | |
10692 | if (link_order->type == bfd_section_reloc_link_order) | |
10693 | sym_name = bfd_section_name (output_bfd, | |
10694 | link_order->u.reloc.p->u.section); | |
10695 | else | |
10696 | sym_name = link_order->u.reloc.p->u.name; | |
10697 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
10698 | (info, NULL, sym_name, howto->name, addend, NULL, |
10699 | NULL, (bfd_vma) 0))) | |
c152c796 AM |
10700 | { |
10701 | free (buf); | |
10702 | return FALSE; | |
10703 | } | |
10704 | break; | |
10705 | } | |
10706 | ok = bfd_set_section_contents (output_bfd, output_section, buf, | |
10707 | link_order->offset, size); | |
10708 | free (buf); | |
10709 | if (! ok) | |
10710 | return FALSE; | |
10711 | } | |
10712 | ||
10713 | /* The address of a reloc is relative to the section in a | |
10714 | relocatable file, and is a virtual address in an executable | |
10715 | file. */ | |
10716 | offset = link_order->offset; | |
0e1862bb | 10717 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
10718 | offset += output_section->vma; |
10719 | ||
10720 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10721 | { | |
10722 | irel[i].r_offset = offset; | |
10723 | irel[i].r_info = 0; | |
10724 | irel[i].r_addend = 0; | |
10725 | } | |
10726 | if (bed->s->arch_size == 32) | |
10727 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10728 | else | |
10729 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10730 | ||
d4730f92 | 10731 | rel_hdr = reldata->hdr; |
c152c796 AM |
10732 | erel = rel_hdr->contents; |
10733 | if (rel_hdr->sh_type == SHT_REL) | |
10734 | { | |
d4730f92 | 10735 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10736 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10737 | } | |
10738 | else | |
10739 | { | |
10740 | irel[0].r_addend = addend; | |
d4730f92 | 10741 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10742 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10743 | } | |
10744 | ||
d4730f92 | 10745 | ++reldata->count; |
c152c796 AM |
10746 | |
10747 | return TRUE; | |
10748 | } | |
10749 | ||
0b52efa6 PB |
10750 | |
10751 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10752 | ||
10753 | static bfd_vma | |
10754 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10755 | { | |
10756 | Elf_Internal_Shdr **elf_shdrp; | |
10757 | asection *s; | |
10758 | int elfsec; | |
10759 | ||
10760 | s = p->u.indirect.section; | |
10761 | elf_shdrp = elf_elfsections (s->owner); | |
10762 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10763 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10764 | /* PR 290: |
10765 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10766 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10767 | sh_info fields. Hence we could get the situation |
10768 | where elfsec is 0. */ | |
10769 | if (elfsec == 0) | |
10770 | { | |
10771 | const struct elf_backend_data *bed | |
10772 | = get_elf_backend_data (s->owner); | |
10773 | if (bed->link_order_error_handler) | |
d003868e AM |
10774 | bed->link_order_error_handler |
10775 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); | |
185d09ad L |
10776 | return 0; |
10777 | } | |
10778 | else | |
10779 | { | |
10780 | s = elf_shdrp[elfsec]->bfd_section; | |
10781 | return s->output_section->vma + s->output_offset; | |
10782 | } | |
0b52efa6 PB |
10783 | } |
10784 | ||
10785 | ||
10786 | /* Compare two sections based on the locations of the sections they are | |
10787 | linked to. Used by elf_fixup_link_order. */ | |
10788 | ||
10789 | static int | |
10790 | compare_link_order (const void * a, const void * b) | |
10791 | { | |
10792 | bfd_vma apos; | |
10793 | bfd_vma bpos; | |
10794 | ||
10795 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
10796 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
10797 | if (apos < bpos) | |
10798 | return -1; | |
10799 | return apos > bpos; | |
10800 | } | |
10801 | ||
10802 | ||
10803 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
10804 | order as their linked sections. Returns false if this could not be done | |
10805 | because an output section includes both ordered and unordered | |
10806 | sections. Ideally we'd do this in the linker proper. */ | |
10807 | ||
10808 | static bfd_boolean | |
10809 | elf_fixup_link_order (bfd *abfd, asection *o) | |
10810 | { | |
10811 | int seen_linkorder; | |
10812 | int seen_other; | |
10813 | int n; | |
10814 | struct bfd_link_order *p; | |
10815 | bfd *sub; | |
10816 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 10817 | unsigned elfsec; |
0b52efa6 | 10818 | struct bfd_link_order **sections; |
d33cdfe3 | 10819 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 10820 | bfd_vma offset; |
3b36f7e6 | 10821 | |
d33cdfe3 L |
10822 | other_sec = NULL; |
10823 | linkorder_sec = NULL; | |
0b52efa6 PB |
10824 | seen_other = 0; |
10825 | seen_linkorder = 0; | |
8423293d | 10826 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 10827 | { |
d33cdfe3 | 10828 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
10829 | { |
10830 | s = p->u.indirect.section; | |
d33cdfe3 L |
10831 | sub = s->owner; |
10832 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
10833 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
10834 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
10835 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
10836 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
10837 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
10838 | { |
10839 | seen_linkorder++; | |
10840 | linkorder_sec = s; | |
10841 | } | |
0b52efa6 | 10842 | else |
d33cdfe3 L |
10843 | { |
10844 | seen_other++; | |
10845 | other_sec = s; | |
10846 | } | |
0b52efa6 PB |
10847 | } |
10848 | else | |
10849 | seen_other++; | |
d33cdfe3 L |
10850 | |
10851 | if (seen_other && seen_linkorder) | |
10852 | { | |
10853 | if (other_sec && linkorder_sec) | |
10854 | (*_bfd_error_handler) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"), | |
10855 | o, linkorder_sec, | |
10856 | linkorder_sec->owner, other_sec, | |
10857 | other_sec->owner); | |
10858 | else | |
10859 | (*_bfd_error_handler) (_("%A has both ordered and unordered sections"), | |
10860 | o); | |
10861 | bfd_set_error (bfd_error_bad_value); | |
10862 | return FALSE; | |
10863 | } | |
0b52efa6 PB |
10864 | } |
10865 | ||
10866 | if (!seen_linkorder) | |
10867 | return TRUE; | |
10868 | ||
0b52efa6 | 10869 | sections = (struct bfd_link_order **) |
14b1c01e AM |
10870 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
10871 | if (sections == NULL) | |
10872 | return FALSE; | |
0b52efa6 | 10873 | seen_linkorder = 0; |
3b36f7e6 | 10874 | |
8423293d | 10875 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
10876 | { |
10877 | sections[seen_linkorder++] = p; | |
10878 | } | |
10879 | /* Sort the input sections in the order of their linked section. */ | |
10880 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
10881 | compare_link_order); | |
10882 | ||
10883 | /* Change the offsets of the sections. */ | |
10884 | offset = 0; | |
10885 | for (n = 0; n < seen_linkorder; n++) | |
10886 | { | |
10887 | s = sections[n]->u.indirect.section; | |
461686a3 | 10888 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
0b52efa6 PB |
10889 | s->output_offset = offset; |
10890 | sections[n]->offset = offset; | |
5dabe785 | 10891 | /* FIXME: octets_per_byte. */ |
0b52efa6 PB |
10892 | offset += sections[n]->size; |
10893 | } | |
10894 | ||
4dd07732 | 10895 | free (sections); |
0b52efa6 PB |
10896 | return TRUE; |
10897 | } | |
10898 | ||
9f7c3e5e AM |
10899 | static void |
10900 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
10901 | { | |
10902 | asection *o; | |
10903 | ||
10904 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 10905 | _bfd_elf_strtab_free (flinfo->symstrtab); |
9f7c3e5e AM |
10906 | if (flinfo->contents != NULL) |
10907 | free (flinfo->contents); | |
10908 | if (flinfo->external_relocs != NULL) | |
10909 | free (flinfo->external_relocs); | |
10910 | if (flinfo->internal_relocs != NULL) | |
10911 | free (flinfo->internal_relocs); | |
10912 | if (flinfo->external_syms != NULL) | |
10913 | free (flinfo->external_syms); | |
10914 | if (flinfo->locsym_shndx != NULL) | |
10915 | free (flinfo->locsym_shndx); | |
10916 | if (flinfo->internal_syms != NULL) | |
10917 | free (flinfo->internal_syms); | |
10918 | if (flinfo->indices != NULL) | |
10919 | free (flinfo->indices); | |
10920 | if (flinfo->sections != NULL) | |
10921 | free (flinfo->sections); | |
9f7c3e5e AM |
10922 | if (flinfo->symshndxbuf != NULL) |
10923 | free (flinfo->symshndxbuf); | |
10924 | for (o = obfd->sections; o != NULL; o = o->next) | |
10925 | { | |
10926 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10927 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
10928 | free (esdo->rel.hashes); | |
10929 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
10930 | free (esdo->rela.hashes); | |
10931 | } | |
10932 | } | |
0b52efa6 | 10933 | |
c152c796 AM |
10934 | /* Do the final step of an ELF link. */ |
10935 | ||
10936 | bfd_boolean | |
10937 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
10938 | { | |
10939 | bfd_boolean dynamic; | |
10940 | bfd_boolean emit_relocs; | |
10941 | bfd *dynobj; | |
8b127cbc | 10942 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
10943 | asection *o; |
10944 | struct bfd_link_order *p; | |
10945 | bfd *sub; | |
c152c796 AM |
10946 | bfd_size_type max_contents_size; |
10947 | bfd_size_type max_external_reloc_size; | |
10948 | bfd_size_type max_internal_reloc_count; | |
10949 | bfd_size_type max_sym_count; | |
10950 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
10951 | Elf_Internal_Sym elfsym; |
10952 | unsigned int i; | |
10953 | Elf_Internal_Shdr *symtab_hdr; | |
10954 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
10955 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
10956 | struct elf_outext_info eoinfo; | |
10957 | bfd_boolean merged; | |
10958 | size_t relativecount = 0; | |
10959 | asection *reldyn = 0; | |
10960 | bfd_size_type amt; | |
104d59d1 JM |
10961 | asection *attr_section = NULL; |
10962 | bfd_vma attr_size = 0; | |
10963 | const char *std_attrs_section; | |
c152c796 AM |
10964 | |
10965 | if (! is_elf_hash_table (info->hash)) | |
10966 | return FALSE; | |
10967 | ||
0e1862bb | 10968 | if (bfd_link_pic (info)) |
c152c796 AM |
10969 | abfd->flags |= DYNAMIC; |
10970 | ||
10971 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
10972 | dynobj = elf_hash_table (info)->dynobj; | |
10973 | ||
0e1862bb | 10974 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 10975 | || info->emitrelocations); |
c152c796 | 10976 | |
8b127cbc AM |
10977 | flinfo.info = info; |
10978 | flinfo.output_bfd = abfd; | |
ef10c3ac | 10979 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 10980 | if (flinfo.symstrtab == NULL) |
c152c796 AM |
10981 | return FALSE; |
10982 | ||
10983 | if (! dynamic) | |
10984 | { | |
8b127cbc AM |
10985 | flinfo.hash_sec = NULL; |
10986 | flinfo.symver_sec = NULL; | |
c152c796 AM |
10987 | } |
10988 | else | |
10989 | { | |
3d4d4302 | 10990 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 10991 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 10992 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
10993 | /* Note that it is OK if symver_sec is NULL. */ |
10994 | } | |
10995 | ||
8b127cbc AM |
10996 | flinfo.contents = NULL; |
10997 | flinfo.external_relocs = NULL; | |
10998 | flinfo.internal_relocs = NULL; | |
10999 | flinfo.external_syms = NULL; | |
11000 | flinfo.locsym_shndx = NULL; | |
11001 | flinfo.internal_syms = NULL; | |
11002 | flinfo.indices = NULL; | |
11003 | flinfo.sections = NULL; | |
8b127cbc | 11004 | flinfo.symshndxbuf = NULL; |
ffbc01cc | 11005 | flinfo.filesym_count = 0; |
c152c796 | 11006 | |
104d59d1 JM |
11007 | /* The object attributes have been merged. Remove the input |
11008 | sections from the link, and set the contents of the output | |
11009 | secton. */ | |
11010 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
11011 | for (o = abfd->sections; o != NULL; o = o->next) | |
11012 | { | |
11013 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
11014 | || strcmp (o->name, ".gnu.attributes") == 0) | |
11015 | { | |
11016 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
11017 | { | |
11018 | asection *input_section; | |
11019 | ||
11020 | if (p->type != bfd_indirect_link_order) | |
11021 | continue; | |
11022 | input_section = p->u.indirect.section; | |
11023 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
11024 | elf_link_input_bfd ignores this section. */ | |
11025 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
11026 | } | |
a0c8462f | 11027 | |
104d59d1 JM |
11028 | attr_size = bfd_elf_obj_attr_size (abfd); |
11029 | if (attr_size) | |
11030 | { | |
11031 | bfd_set_section_size (abfd, o, attr_size); | |
11032 | attr_section = o; | |
11033 | /* Skip this section later on. */ | |
11034 | o->map_head.link_order = NULL; | |
11035 | } | |
11036 | else | |
11037 | o->flags |= SEC_EXCLUDE; | |
11038 | } | |
11039 | } | |
11040 | ||
c152c796 AM |
11041 | /* Count up the number of relocations we will output for each output |
11042 | section, so that we know the sizes of the reloc sections. We | |
11043 | also figure out some maximum sizes. */ | |
11044 | max_contents_size = 0; | |
11045 | max_external_reloc_size = 0; | |
11046 | max_internal_reloc_count = 0; | |
11047 | max_sym_count = 0; | |
11048 | max_sym_shndx_count = 0; | |
11049 | merged = FALSE; | |
11050 | for (o = abfd->sections; o != NULL; o = o->next) | |
11051 | { | |
11052 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
11053 | o->reloc_count = 0; | |
11054 | ||
8423293d | 11055 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11056 | { |
11057 | unsigned int reloc_count = 0; | |
491d01d3 | 11058 | unsigned int additional_reloc_count = 0; |
c152c796 | 11059 | struct bfd_elf_section_data *esdi = NULL; |
c152c796 AM |
11060 | |
11061 | if (p->type == bfd_section_reloc_link_order | |
11062 | || p->type == bfd_symbol_reloc_link_order) | |
11063 | reloc_count = 1; | |
11064 | else if (p->type == bfd_indirect_link_order) | |
11065 | { | |
11066 | asection *sec; | |
11067 | ||
11068 | sec = p->u.indirect.section; | |
11069 | esdi = elf_section_data (sec); | |
11070 | ||
11071 | /* Mark all sections which are to be included in the | |
11072 | link. This will normally be every section. We need | |
11073 | to do this so that we can identify any sections which | |
11074 | the linker has decided to not include. */ | |
11075 | sec->linker_mark = TRUE; | |
11076 | ||
11077 | if (sec->flags & SEC_MERGE) | |
11078 | merged = TRUE; | |
11079 | ||
aed64b35 L |
11080 | if (esdo->this_hdr.sh_type == SHT_REL |
11081 | || esdo->this_hdr.sh_type == SHT_RELA) | |
11082 | /* Some backends use reloc_count in relocation sections | |
11083 | to count particular types of relocs. Of course, | |
11084 | reloc sections themselves can't have relocations. */ | |
11085 | reloc_count = 0; | |
0e1862bb | 11086 | else if (emit_relocs) |
491d01d3 YU |
11087 | { |
11088 | reloc_count = sec->reloc_count; | |
11089 | if (bed->elf_backend_count_additional_relocs) | |
11090 | { | |
11091 | int c; | |
11092 | c = (*bed->elf_backend_count_additional_relocs) (sec); | |
11093 | additional_reloc_count += c; | |
11094 | } | |
11095 | } | |
c152c796 | 11096 | else if (bed->elf_backend_count_relocs) |
58217f29 | 11097 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); |
c152c796 | 11098 | |
eea6121a AM |
11099 | if (sec->rawsize > max_contents_size) |
11100 | max_contents_size = sec->rawsize; | |
11101 | if (sec->size > max_contents_size) | |
11102 | max_contents_size = sec->size; | |
c152c796 AM |
11103 | |
11104 | /* We are interested in just local symbols, not all | |
11105 | symbols. */ | |
11106 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
11107 | && (sec->owner->flags & DYNAMIC) == 0) | |
11108 | { | |
11109 | size_t sym_count; | |
11110 | ||
11111 | if (elf_bad_symtab (sec->owner)) | |
11112 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
11113 | / bed->s->sizeof_sym); | |
11114 | else | |
11115 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
11116 | ||
11117 | if (sym_count > max_sym_count) | |
11118 | max_sym_count = sym_count; | |
11119 | ||
11120 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 11121 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
11122 | max_sym_shndx_count = sym_count; |
11123 | ||
11124 | if ((sec->flags & SEC_RELOC) != 0) | |
11125 | { | |
d4730f92 | 11126 | size_t ext_size = 0; |
c152c796 | 11127 | |
d4730f92 BS |
11128 | if (esdi->rel.hdr != NULL) |
11129 | ext_size = esdi->rel.hdr->sh_size; | |
11130 | if (esdi->rela.hdr != NULL) | |
11131 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 11132 | |
c152c796 AM |
11133 | if (ext_size > max_external_reloc_size) |
11134 | max_external_reloc_size = ext_size; | |
11135 | if (sec->reloc_count > max_internal_reloc_count) | |
11136 | max_internal_reloc_count = sec->reloc_count; | |
11137 | } | |
11138 | } | |
11139 | } | |
11140 | ||
11141 | if (reloc_count == 0) | |
11142 | continue; | |
11143 | ||
491d01d3 | 11144 | reloc_count += additional_reloc_count; |
c152c796 AM |
11145 | o->reloc_count += reloc_count; |
11146 | ||
0e1862bb | 11147 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 11148 | { |
d4730f92 | 11149 | if (esdi->rel.hdr) |
491d01d3 YU |
11150 | { |
11151 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); | |
11152 | esdo->rel.count += additional_reloc_count; | |
11153 | } | |
d4730f92 | 11154 | if (esdi->rela.hdr) |
491d01d3 YU |
11155 | { |
11156 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); | |
11157 | esdo->rela.count += additional_reloc_count; | |
11158 | } | |
d4730f92 BS |
11159 | } |
11160 | else | |
11161 | { | |
11162 | if (o->use_rela_p) | |
11163 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 11164 | else |
d4730f92 | 11165 | esdo->rel.count += reloc_count; |
c152c796 | 11166 | } |
c152c796 AM |
11167 | } |
11168 | ||
11169 | if (o->reloc_count > 0) | |
11170 | o->flags |= SEC_RELOC; | |
11171 | else | |
11172 | { | |
11173 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
11174 | set it (this is probably a bug) and if it is set | |
11175 | assign_section_numbers will create a reloc section. */ | |
11176 | o->flags &=~ SEC_RELOC; | |
11177 | } | |
11178 | ||
11179 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
11180 | zero. This is done in elf_fake_sections as well, but forcing | |
11181 | the VMA to 0 here will ensure that relocs against these | |
11182 | sections are handled correctly. */ | |
11183 | if ((o->flags & SEC_ALLOC) == 0 | |
11184 | && ! o->user_set_vma) | |
11185 | o->vma = 0; | |
11186 | } | |
11187 | ||
0e1862bb | 11188 | if (! bfd_link_relocatable (info) && merged) |
c152c796 AM |
11189 | elf_link_hash_traverse (elf_hash_table (info), |
11190 | _bfd_elf_link_sec_merge_syms, abfd); | |
11191 | ||
11192 | /* Figure out the file positions for everything but the symbol table | |
11193 | and the relocs. We set symcount to force assign_section_numbers | |
11194 | to create a symbol table. */ | |
8539e4e8 | 11195 | bfd_get_symcount (abfd) = info->strip != strip_all || emit_relocs; |
c152c796 AM |
11196 | BFD_ASSERT (! abfd->output_has_begun); |
11197 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
11198 | goto error_return; | |
11199 | ||
ee75fd95 | 11200 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
11201 | for (o = abfd->sections; o != NULL; o = o->next) |
11202 | { | |
d4730f92 | 11203 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11204 | if ((o->flags & SEC_RELOC) != 0) |
11205 | { | |
d4730f92 BS |
11206 | if (esdo->rel.hdr |
11207 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) | |
c152c796 AM |
11208 | goto error_return; |
11209 | ||
d4730f92 BS |
11210 | if (esdo->rela.hdr |
11211 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) | |
c152c796 AM |
11212 | goto error_return; |
11213 | } | |
11214 | ||
11215 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
11216 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
11217 | esdo->rel.count = 0; |
11218 | esdo->rela.count = 0; | |
0ce398f1 L |
11219 | |
11220 | if (esdo->this_hdr.sh_offset == (file_ptr) -1) | |
11221 | { | |
11222 | /* Cache the section contents so that they can be compressed | |
11223 | later. Use bfd_malloc since it will be freed by | |
11224 | bfd_compress_section_contents. */ | |
11225 | unsigned char *contents = esdo->this_hdr.contents; | |
11226 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
11227 | abort (); | |
11228 | contents | |
11229 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
11230 | if (contents == NULL) | |
11231 | goto error_return; | |
11232 | esdo->this_hdr.contents = contents; | |
11233 | } | |
c152c796 AM |
11234 | } |
11235 | ||
c152c796 | 11236 | /* We have now assigned file positions for all the sections except |
a485e98e AM |
11237 | .symtab, .strtab, and non-loaded reloc sections. We start the |
11238 | .symtab section at the current file position, and write directly | |
11239 | to it. We build the .strtab section in memory. */ | |
c152c796 AM |
11240 | bfd_get_symcount (abfd) = 0; |
11241 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11242 | /* sh_name is set in prep_headers. */ | |
11243 | symtab_hdr->sh_type = SHT_SYMTAB; | |
11244 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
11245 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
11246 | /* sh_link is set in assign_section_numbers. */ | |
11247 | /* sh_info is set below. */ | |
11248 | /* sh_offset is set just below. */ | |
72de5009 | 11249 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 11250 | |
ef10c3ac L |
11251 | if (max_sym_count < 20) |
11252 | max_sym_count = 20; | |
11253 | elf_hash_table (info)->strtabsize = max_sym_count; | |
11254 | amt = max_sym_count * sizeof (struct elf_sym_strtab); | |
11255 | elf_hash_table (info)->strtab | |
11256 | = (struct elf_sym_strtab *) bfd_malloc (amt); | |
11257 | if (elf_hash_table (info)->strtab == NULL) | |
c152c796 | 11258 | goto error_return; |
ef10c3ac L |
11259 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
11260 | flinfo.symshndxbuf | |
11261 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
11262 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 11263 | |
8539e4e8 | 11264 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 11265 | { |
8539e4e8 AM |
11266 | file_ptr off = elf_next_file_pos (abfd); |
11267 | ||
11268 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
11269 | ||
11270 | /* Note that at this point elf_next_file_pos (abfd) is | |
11271 | incorrect. We do not yet know the size of the .symtab section. | |
11272 | We correct next_file_pos below, after we do know the size. */ | |
11273 | ||
11274 | /* Start writing out the symbol table. The first symbol is always a | |
11275 | dummy symbol. */ | |
c152c796 AM |
11276 | elfsym.st_value = 0; |
11277 | elfsym.st_size = 0; | |
11278 | elfsym.st_info = 0; | |
11279 | elfsym.st_other = 0; | |
11280 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 11281 | elfsym.st_target_internal = 0; |
ef10c3ac L |
11282 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
11283 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 11284 | goto error_return; |
c152c796 | 11285 | |
8539e4e8 AM |
11286 | /* Output a symbol for each section. We output these even if we are |
11287 | discarding local symbols, since they are used for relocs. These | |
11288 | symbols have no names. We store the index of each one in the | |
11289 | index field of the section, so that we can find it again when | |
11290 | outputting relocs. */ | |
11291 | ||
c152c796 AM |
11292 | elfsym.st_size = 0; |
11293 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11294 | elfsym.st_other = 0; | |
f0b5bb34 | 11295 | elfsym.st_value = 0; |
35fc36a8 | 11296 | elfsym.st_target_internal = 0; |
c152c796 AM |
11297 | for (i = 1; i < elf_numsections (abfd); i++) |
11298 | { | |
11299 | o = bfd_section_from_elf_index (abfd, i); | |
11300 | if (o != NULL) | |
f0b5bb34 AM |
11301 | { |
11302 | o->target_index = bfd_get_symcount (abfd); | |
11303 | elfsym.st_shndx = i; | |
0e1862bb | 11304 | if (!bfd_link_relocatable (info)) |
f0b5bb34 | 11305 | elfsym.st_value = o->vma; |
ef10c3ac L |
11306 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, o, |
11307 | NULL) != 1) | |
f0b5bb34 AM |
11308 | goto error_return; |
11309 | } | |
c152c796 AM |
11310 | } |
11311 | } | |
11312 | ||
11313 | /* Allocate some memory to hold information read in from the input | |
11314 | files. */ | |
11315 | if (max_contents_size != 0) | |
11316 | { | |
8b127cbc AM |
11317 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
11318 | if (flinfo.contents == NULL) | |
c152c796 AM |
11319 | goto error_return; |
11320 | } | |
11321 | ||
11322 | if (max_external_reloc_size != 0) | |
11323 | { | |
8b127cbc AM |
11324 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
11325 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
11326 | goto error_return; |
11327 | } | |
11328 | ||
11329 | if (max_internal_reloc_count != 0) | |
11330 | { | |
11331 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
11332 | amt *= sizeof (Elf_Internal_Rela); | |
8b127cbc AM |
11333 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
11334 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
11335 | goto error_return; |
11336 | } | |
11337 | ||
11338 | if (max_sym_count != 0) | |
11339 | { | |
11340 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
11341 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
11342 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
11343 | goto error_return; |
11344 | ||
11345 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
11346 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
11347 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
11348 | goto error_return; |
11349 | ||
11350 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
11351 | flinfo.indices = (long int *) bfd_malloc (amt); |
11352 | if (flinfo.indices == NULL) | |
c152c796 AM |
11353 | goto error_return; |
11354 | ||
11355 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
11356 | flinfo.sections = (asection **) bfd_malloc (amt); |
11357 | if (flinfo.sections == NULL) | |
c152c796 AM |
11358 | goto error_return; |
11359 | } | |
11360 | ||
11361 | if (max_sym_shndx_count != 0) | |
11362 | { | |
11363 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
11364 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
11365 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
11366 | goto error_return; |
11367 | } | |
11368 | ||
11369 | if (elf_hash_table (info)->tls_sec) | |
11370 | { | |
11371 | bfd_vma base, end = 0; | |
11372 | asection *sec; | |
11373 | ||
11374 | for (sec = elf_hash_table (info)->tls_sec; | |
11375 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
11376 | sec = sec->next) | |
11377 | { | |
3a800eb9 | 11378 | bfd_size_type size = sec->size; |
c152c796 | 11379 | |
3a800eb9 AM |
11380 | if (size == 0 |
11381 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 11382 | { |
91d6fa6a NC |
11383 | struct bfd_link_order *ord = sec->map_tail.link_order; |
11384 | ||
11385 | if (ord != NULL) | |
11386 | size = ord->offset + ord->size; | |
c152c796 AM |
11387 | } |
11388 | end = sec->vma + size; | |
11389 | } | |
11390 | base = elf_hash_table (info)->tls_sec->vma; | |
7dc98aea RO |
11391 | /* Only align end of TLS section if static TLS doesn't have special |
11392 | alignment requirements. */ | |
11393 | if (bed->static_tls_alignment == 1) | |
11394 | end = align_power (end, | |
11395 | elf_hash_table (info)->tls_sec->alignment_power); | |
c152c796 AM |
11396 | elf_hash_table (info)->tls_size = end - base; |
11397 | } | |
11398 | ||
0b52efa6 PB |
11399 | /* Reorder SHF_LINK_ORDER sections. */ |
11400 | for (o = abfd->sections; o != NULL; o = o->next) | |
11401 | { | |
11402 | if (!elf_fixup_link_order (abfd, o)) | |
11403 | return FALSE; | |
11404 | } | |
11405 | ||
2f0c68f2 CM |
11406 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
11407 | return FALSE; | |
11408 | ||
c152c796 AM |
11409 | /* Since ELF permits relocations to be against local symbols, we |
11410 | must have the local symbols available when we do the relocations. | |
11411 | Since we would rather only read the local symbols once, and we | |
11412 | would rather not keep them in memory, we handle all the | |
11413 | relocations for a single input file at the same time. | |
11414 | ||
11415 | Unfortunately, there is no way to know the total number of local | |
11416 | symbols until we have seen all of them, and the local symbol | |
11417 | indices precede the global symbol indices. This means that when | |
11418 | we are generating relocatable output, and we see a reloc against | |
11419 | a global symbol, we can not know the symbol index until we have | |
11420 | finished examining all the local symbols to see which ones we are | |
11421 | going to output. To deal with this, we keep the relocations in | |
11422 | memory, and don't output them until the end of the link. This is | |
11423 | an unfortunate waste of memory, but I don't see a good way around | |
11424 | it. Fortunately, it only happens when performing a relocatable | |
11425 | link, which is not the common case. FIXME: If keep_memory is set | |
11426 | we could write the relocs out and then read them again; I don't | |
11427 | know how bad the memory loss will be. */ | |
11428 | ||
c72f2fb2 | 11429 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
11430 | sub->output_has_begun = FALSE; |
11431 | for (o = abfd->sections; o != NULL; o = o->next) | |
11432 | { | |
8423293d | 11433 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11434 | { |
11435 | if (p->type == bfd_indirect_link_order | |
11436 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
11437 | == bfd_target_elf_flavour) | |
11438 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
11439 | { | |
11440 | if (! sub->output_has_begun) | |
11441 | { | |
8b127cbc | 11442 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
11443 | goto error_return; |
11444 | sub->output_has_begun = TRUE; | |
11445 | } | |
11446 | } | |
11447 | else if (p->type == bfd_section_reloc_link_order | |
11448 | || p->type == bfd_symbol_reloc_link_order) | |
11449 | { | |
11450 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
11451 | goto error_return; | |
11452 | } | |
11453 | else | |
11454 | { | |
11455 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
11456 | { |
11457 | if (p->type == bfd_indirect_link_order | |
11458 | && (bfd_get_flavour (sub) | |
11459 | == bfd_target_elf_flavour) | |
11460 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
11461 | != bed->s->elfclass)) | |
11462 | { | |
11463 | const char *iclass, *oclass; | |
11464 | ||
aebf9be7 | 11465 | switch (bed->s->elfclass) |
351f65ca | 11466 | { |
aebf9be7 NC |
11467 | case ELFCLASS64: oclass = "ELFCLASS64"; break; |
11468 | case ELFCLASS32: oclass = "ELFCLASS32"; break; | |
11469 | case ELFCLASSNONE: oclass = "ELFCLASSNONE"; break; | |
11470 | default: abort (); | |
351f65ca | 11471 | } |
aebf9be7 NC |
11472 | |
11473 | switch (elf_elfheader (sub)->e_ident[EI_CLASS]) | |
351f65ca | 11474 | { |
aebf9be7 NC |
11475 | case ELFCLASS64: iclass = "ELFCLASS64"; break; |
11476 | case ELFCLASS32: iclass = "ELFCLASS32"; break; | |
11477 | case ELFCLASSNONE: iclass = "ELFCLASSNONE"; break; | |
11478 | default: abort (); | |
351f65ca L |
11479 | } |
11480 | ||
11481 | bfd_set_error (bfd_error_wrong_format); | |
11482 | (*_bfd_error_handler) | |
11483 | (_("%B: file class %s incompatible with %s"), | |
11484 | sub, iclass, oclass); | |
11485 | } | |
11486 | ||
11487 | goto error_return; | |
11488 | } | |
c152c796 AM |
11489 | } |
11490 | } | |
11491 | } | |
11492 | ||
c0f00686 L |
11493 | /* Free symbol buffer if needed. */ |
11494 | if (!info->reduce_memory_overheads) | |
11495 | { | |
c72f2fb2 | 11496 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
3fcd97f1 JJ |
11497 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
11498 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
11499 | { |
11500 | free (elf_tdata (sub)->symbuf); | |
11501 | elf_tdata (sub)->symbuf = NULL; | |
11502 | } | |
11503 | } | |
11504 | ||
c152c796 AM |
11505 | /* Output any global symbols that got converted to local in a |
11506 | version script or due to symbol visibility. We do this in a | |
11507 | separate step since ELF requires all local symbols to appear | |
11508 | prior to any global symbols. FIXME: We should only do this if | |
11509 | some global symbols were, in fact, converted to become local. | |
11510 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
11511 | eoinfo.failed = FALSE; | |
8b127cbc | 11512 | eoinfo.flinfo = &flinfo; |
c152c796 | 11513 | eoinfo.localsyms = TRUE; |
34a79995 | 11514 | eoinfo.file_sym_done = FALSE; |
7686d77d | 11515 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11516 | if (eoinfo.failed) |
11517 | return FALSE; | |
11518 | ||
4e617b1e PB |
11519 | /* If backend needs to output some local symbols not present in the hash |
11520 | table, do it now. */ | |
8539e4e8 AM |
11521 | if (bed->elf_backend_output_arch_local_syms |
11522 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 11523 | { |
6e0b88f1 | 11524 | typedef int (*out_sym_func) |
4e617b1e PB |
11525 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11526 | struct elf_link_hash_entry *); | |
11527 | ||
11528 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
ef10c3ac L |
11529 | (abfd, info, &flinfo, |
11530 | (out_sym_func) elf_link_output_symstrtab))) | |
4e617b1e PB |
11531 | return FALSE; |
11532 | } | |
11533 | ||
c152c796 AM |
11534 | /* That wrote out all the local symbols. Finish up the symbol table |
11535 | with the global symbols. Even if we want to strip everything we | |
11536 | can, we still need to deal with those global symbols that got | |
11537 | converted to local in a version script. */ | |
11538 | ||
11539 | /* The sh_info field records the index of the first non local symbol. */ | |
11540 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
11541 | ||
11542 | if (dynamic | |
cae1fbbb L |
11543 | && elf_hash_table (info)->dynsym != NULL |
11544 | && (elf_hash_table (info)->dynsym->output_section | |
11545 | != bfd_abs_section_ptr)) | |
c152c796 AM |
11546 | { |
11547 | Elf_Internal_Sym sym; | |
cae1fbbb | 11548 | bfd_byte *dynsym = elf_hash_table (info)->dynsym->contents; |
c152c796 AM |
11549 | long last_local = 0; |
11550 | ||
11551 | /* Write out the section symbols for the output sections. */ | |
0e1862bb L |
11552 | if (bfd_link_pic (info) |
11553 | || elf_hash_table (info)->is_relocatable_executable) | |
c152c796 AM |
11554 | { |
11555 | asection *s; | |
11556 | ||
11557 | sym.st_size = 0; | |
11558 | sym.st_name = 0; | |
11559 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11560 | sym.st_other = 0; | |
35fc36a8 | 11561 | sym.st_target_internal = 0; |
c152c796 AM |
11562 | |
11563 | for (s = abfd->sections; s != NULL; s = s->next) | |
11564 | { | |
11565 | int indx; | |
11566 | bfd_byte *dest; | |
11567 | long dynindx; | |
11568 | ||
c152c796 | 11569 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
11570 | if (dynindx <= 0) |
11571 | continue; | |
11572 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
11573 | BFD_ASSERT (indx > 0); |
11574 | sym.st_shndx = indx; | |
c0d5a53d L |
11575 | if (! check_dynsym (abfd, &sym)) |
11576 | return FALSE; | |
c152c796 AM |
11577 | sym.st_value = s->vma; |
11578 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
8c37241b JJ |
11579 | if (last_local < dynindx) |
11580 | last_local = dynindx; | |
c152c796 AM |
11581 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
11582 | } | |
c152c796 AM |
11583 | } |
11584 | ||
11585 | /* Write out the local dynsyms. */ | |
11586 | if (elf_hash_table (info)->dynlocal) | |
11587 | { | |
11588 | struct elf_link_local_dynamic_entry *e; | |
11589 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
11590 | { | |
11591 | asection *s; | |
11592 | bfd_byte *dest; | |
11593 | ||
935bd1e0 | 11594 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
11595 | Note that we saved a word of storage and overwrote |
11596 | the original st_name with the dynstr_index. */ | |
11597 | sym = e->isym; | |
935bd1e0 | 11598 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 11599 | |
cb33740c AM |
11600 | s = bfd_section_from_elf_index (e->input_bfd, |
11601 | e->isym.st_shndx); | |
11602 | if (s != NULL) | |
c152c796 | 11603 | { |
c152c796 AM |
11604 | sym.st_shndx = |
11605 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
11606 | if (! check_dynsym (abfd, &sym)) |
11607 | return FALSE; | |
c152c796 AM |
11608 | sym.st_value = (s->output_section->vma |
11609 | + s->output_offset | |
11610 | + e->isym.st_value); | |
11611 | } | |
11612 | ||
11613 | if (last_local < e->dynindx) | |
11614 | last_local = e->dynindx; | |
11615 | ||
11616 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; | |
11617 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11618 | } | |
11619 | } | |
11620 | ||
cae1fbbb | 11621 | elf_section_data (elf_hash_table (info)->dynsym->output_section)->this_hdr.sh_info = |
c152c796 AM |
11622 | last_local + 1; |
11623 | } | |
11624 | ||
11625 | /* We get the global symbols from the hash table. */ | |
11626 | eoinfo.failed = FALSE; | |
11627 | eoinfo.localsyms = FALSE; | |
8b127cbc | 11628 | eoinfo.flinfo = &flinfo; |
7686d77d | 11629 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11630 | if (eoinfo.failed) |
11631 | return FALSE; | |
11632 | ||
11633 | /* If backend needs to output some symbols not present in the hash | |
11634 | table, do it now. */ | |
8539e4e8 AM |
11635 | if (bed->elf_backend_output_arch_syms |
11636 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 11637 | { |
6e0b88f1 | 11638 | typedef int (*out_sym_func) |
c152c796 AM |
11639 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11640 | struct elf_link_hash_entry *); | |
11641 | ||
11642 | if (! ((*bed->elf_backend_output_arch_syms) | |
ef10c3ac L |
11643 | (abfd, info, &flinfo, |
11644 | (out_sym_func) elf_link_output_symstrtab))) | |
c152c796 AM |
11645 | return FALSE; |
11646 | } | |
11647 | ||
ef10c3ac L |
11648 | /* Finalize the .strtab section. */ |
11649 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
11650 | ||
11651 | /* Swap out the .strtab section. */ | |
11652 | if (!elf_link_swap_symbols_out (&flinfo)) | |
c152c796 AM |
11653 | return FALSE; |
11654 | ||
11655 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
11656 | if (bfd_get_symcount (abfd) > 0) |
11657 | { | |
ee3b52e9 L |
11658 | /* Finish up and write out the symbol string table (.strtab) |
11659 | section. */ | |
11660 | Elf_Internal_Shdr *symstrtab_hdr; | |
8539e4e8 AM |
11661 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
11662 | ||
6a40cf0c NC |
11663 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
11664 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) | |
8539e4e8 AM |
11665 | { |
11666 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
11667 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
11668 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
11669 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
11670 | symtab_shndx_hdr->sh_size = amt; | |
11671 | ||
11672 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
11673 | off, TRUE); | |
11674 | ||
11675 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
11676 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
11677 | return FALSE; | |
11678 | } | |
ee3b52e9 L |
11679 | |
11680 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
11681 | /* sh_name was set in prep_headers. */ | |
11682 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
11683 | symstrtab_hdr->sh_flags = 0; | |
11684 | symstrtab_hdr->sh_addr = 0; | |
ef10c3ac | 11685 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
11686 | symstrtab_hdr->sh_entsize = 0; |
11687 | symstrtab_hdr->sh_link = 0; | |
11688 | symstrtab_hdr->sh_info = 0; | |
11689 | /* sh_offset is set just below. */ | |
11690 | symstrtab_hdr->sh_addralign = 1; | |
11691 | ||
11692 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
11693 | off, TRUE); | |
11694 | elf_next_file_pos (abfd) = off; | |
11695 | ||
c152c796 | 11696 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 11697 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
c152c796 AM |
11698 | return FALSE; |
11699 | } | |
11700 | ||
11701 | /* Adjust the relocs to have the correct symbol indices. */ | |
11702 | for (o = abfd->sections; o != NULL; o = o->next) | |
11703 | { | |
d4730f92 | 11704 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
28dbcedc | 11705 | bfd_boolean sort; |
c152c796 AM |
11706 | if ((o->flags & SEC_RELOC) == 0) |
11707 | continue; | |
11708 | ||
28dbcedc | 11709 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 AM |
11710 | if (esdo->rel.hdr != NULL |
11711 | && !elf_link_adjust_relocs (abfd, &esdo->rel, sort)) | |
11712 | return FALSE; | |
11713 | if (esdo->rela.hdr != NULL | |
11714 | && !elf_link_adjust_relocs (abfd, &esdo->rela, sort)) | |
11715 | return FALSE; | |
c152c796 AM |
11716 | |
11717 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
11718 | trying to swap the relocs out itself. */ | |
11719 | o->reloc_count = 0; | |
11720 | } | |
11721 | ||
11722 | if (dynamic && info->combreloc && dynobj != NULL) | |
11723 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
11724 | ||
11725 | /* If we are linking against a dynamic object, or generating a | |
11726 | shared library, finish up the dynamic linking information. */ | |
11727 | if (dynamic) | |
11728 | { | |
11729 | bfd_byte *dyncon, *dynconend; | |
11730 | ||
11731 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 11732 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
11733 | BFD_ASSERT (o != NULL); |
11734 | ||
11735 | dyncon = o->contents; | |
eea6121a | 11736 | dynconend = o->contents + o->size; |
c152c796 AM |
11737 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
11738 | { | |
11739 | Elf_Internal_Dyn dyn; | |
11740 | const char *name; | |
11741 | unsigned int type; | |
11742 | ||
11743 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11744 | ||
11745 | switch (dyn.d_tag) | |
11746 | { | |
11747 | default: | |
11748 | continue; | |
11749 | case DT_NULL: | |
11750 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
11751 | { | |
11752 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
11753 | { | |
11754 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
11755 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
11756 | default: continue; | |
11757 | } | |
11758 | dyn.d_un.d_val = relativecount; | |
11759 | relativecount = 0; | |
11760 | break; | |
11761 | } | |
11762 | continue; | |
11763 | ||
11764 | case DT_INIT: | |
11765 | name = info->init_function; | |
11766 | goto get_sym; | |
11767 | case DT_FINI: | |
11768 | name = info->fini_function; | |
11769 | get_sym: | |
11770 | { | |
11771 | struct elf_link_hash_entry *h; | |
11772 | ||
11773 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
11774 | FALSE, FALSE, TRUE); | |
11775 | if (h != NULL | |
11776 | && (h->root.type == bfd_link_hash_defined | |
11777 | || h->root.type == bfd_link_hash_defweak)) | |
11778 | { | |
bef26483 | 11779 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
11780 | o = h->root.u.def.section; |
11781 | if (o->output_section != NULL) | |
bef26483 | 11782 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
11783 | + o->output_offset); |
11784 | else | |
11785 | { | |
11786 | /* The symbol is imported from another shared | |
11787 | library and does not apply to this one. */ | |
bef26483 | 11788 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11789 | } |
11790 | break; | |
11791 | } | |
11792 | } | |
11793 | continue; | |
11794 | ||
11795 | case DT_PREINIT_ARRAYSZ: | |
11796 | name = ".preinit_array"; | |
11797 | goto get_size; | |
11798 | case DT_INIT_ARRAYSZ: | |
11799 | name = ".init_array"; | |
11800 | goto get_size; | |
11801 | case DT_FINI_ARRAYSZ: | |
11802 | name = ".fini_array"; | |
11803 | get_size: | |
11804 | o = bfd_get_section_by_name (abfd, name); | |
11805 | if (o == NULL) | |
11806 | { | |
11807 | (*_bfd_error_handler) | |
d003868e | 11808 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11809 | goto error_return; |
11810 | } | |
eea6121a | 11811 | if (o->size == 0) |
c152c796 AM |
11812 | (*_bfd_error_handler) |
11813 | (_("warning: %s section has zero size"), name); | |
eea6121a | 11814 | dyn.d_un.d_val = o->size; |
c152c796 AM |
11815 | break; |
11816 | ||
11817 | case DT_PREINIT_ARRAY: | |
11818 | name = ".preinit_array"; | |
11819 | goto get_vma; | |
11820 | case DT_INIT_ARRAY: | |
11821 | name = ".init_array"; | |
11822 | goto get_vma; | |
11823 | case DT_FINI_ARRAY: | |
11824 | name = ".fini_array"; | |
11825 | goto get_vma; | |
11826 | ||
11827 | case DT_HASH: | |
11828 | name = ".hash"; | |
11829 | goto get_vma; | |
fdc90cb4 JJ |
11830 | case DT_GNU_HASH: |
11831 | name = ".gnu.hash"; | |
11832 | goto get_vma; | |
c152c796 AM |
11833 | case DT_STRTAB: |
11834 | name = ".dynstr"; | |
11835 | goto get_vma; | |
11836 | case DT_SYMTAB: | |
11837 | name = ".dynsym"; | |
11838 | goto get_vma; | |
11839 | case DT_VERDEF: | |
11840 | name = ".gnu.version_d"; | |
11841 | goto get_vma; | |
11842 | case DT_VERNEED: | |
11843 | name = ".gnu.version_r"; | |
11844 | goto get_vma; | |
11845 | case DT_VERSYM: | |
11846 | name = ".gnu.version"; | |
11847 | get_vma: | |
11848 | o = bfd_get_section_by_name (abfd, name); | |
11849 | if (o == NULL) | |
11850 | { | |
11851 | (*_bfd_error_handler) | |
d003868e | 11852 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11853 | goto error_return; |
11854 | } | |
894891db NC |
11855 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
11856 | { | |
11857 | (*_bfd_error_handler) | |
11858 | (_("warning: section '%s' is being made into a note"), name); | |
11859 | bfd_set_error (bfd_error_nonrepresentable_section); | |
11860 | goto error_return; | |
11861 | } | |
c152c796 AM |
11862 | dyn.d_un.d_ptr = o->vma; |
11863 | break; | |
11864 | ||
11865 | case DT_REL: | |
11866 | case DT_RELA: | |
11867 | case DT_RELSZ: | |
11868 | case DT_RELASZ: | |
11869 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
11870 | type = SHT_REL; | |
11871 | else | |
11872 | type = SHT_RELA; | |
11873 | dyn.d_un.d_val = 0; | |
bef26483 | 11874 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11875 | for (i = 1; i < elf_numsections (abfd); i++) |
11876 | { | |
11877 | Elf_Internal_Shdr *hdr; | |
11878 | ||
11879 | hdr = elf_elfsections (abfd)[i]; | |
11880 | if (hdr->sh_type == type | |
11881 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
11882 | { | |
11883 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
11884 | dyn.d_un.d_val += hdr->sh_size; | |
11885 | else | |
11886 | { | |
bef26483 AM |
11887 | if (dyn.d_un.d_ptr == 0 |
11888 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
11889 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
11890 | } |
11891 | } | |
11892 | } | |
11893 | break; | |
11894 | } | |
11895 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
11896 | } | |
11897 | } | |
11898 | ||
11899 | /* If we have created any dynamic sections, then output them. */ | |
11900 | if (dynobj != NULL) | |
11901 | { | |
11902 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
11903 | goto error_return; | |
11904 | ||
943284cc | 11905 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
0e1862bb | 11906 | if (((info->warn_shared_textrel && bfd_link_pic (info)) |
be7b303d | 11907 | || info->error_textrel) |
3d4d4302 | 11908 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
11909 | { |
11910 | bfd_byte *dyncon, *dynconend; | |
11911 | ||
943284cc DJ |
11912 | dyncon = o->contents; |
11913 | dynconend = o->contents + o->size; | |
11914 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
11915 | { | |
11916 | Elf_Internal_Dyn dyn; | |
11917 | ||
11918 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11919 | ||
11920 | if (dyn.d_tag == DT_TEXTREL) | |
11921 | { | |
c192a133 AM |
11922 | if (info->error_textrel) |
11923 | info->callbacks->einfo | |
11924 | (_("%P%X: read-only segment has dynamic relocations.\n")); | |
11925 | else | |
11926 | info->callbacks->einfo | |
11927 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); | |
943284cc DJ |
11928 | break; |
11929 | } | |
11930 | } | |
11931 | } | |
11932 | ||
c152c796 AM |
11933 | for (o = dynobj->sections; o != NULL; o = o->next) |
11934 | { | |
11935 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 11936 | || o->size == 0 |
c152c796 AM |
11937 | || o->output_section == bfd_abs_section_ptr) |
11938 | continue; | |
11939 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
11940 | { | |
11941 | /* At this point, we are only interested in sections | |
11942 | created by _bfd_elf_link_create_dynamic_sections. */ | |
11943 | continue; | |
11944 | } | |
3722b82f AM |
11945 | if (elf_hash_table (info)->stab_info.stabstr == o) |
11946 | continue; | |
eea6121a AM |
11947 | if (elf_hash_table (info)->eh_info.hdr_sec == o) |
11948 | continue; | |
3d4d4302 | 11949 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 11950 | { |
5dabe785 | 11951 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
11952 | if (! bfd_set_section_contents (abfd, o->output_section, |
11953 | o->contents, | |
11954 | (file_ptr) o->output_offset, | |
eea6121a | 11955 | o->size)) |
c152c796 AM |
11956 | goto error_return; |
11957 | } | |
11958 | else | |
11959 | { | |
11960 | /* The contents of the .dynstr section are actually in a | |
11961 | stringtab. */ | |
8539e4e8 AM |
11962 | file_ptr off; |
11963 | ||
c152c796 AM |
11964 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
11965 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
11966 | || ! _bfd_elf_strtab_emit (abfd, | |
11967 | elf_hash_table (info)->dynstr)) | |
11968 | goto error_return; | |
11969 | } | |
11970 | } | |
11971 | } | |
11972 | ||
0e1862bb | 11973 | if (bfd_link_relocatable (info)) |
c152c796 AM |
11974 | { |
11975 | bfd_boolean failed = FALSE; | |
11976 | ||
11977 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
11978 | if (failed) | |
11979 | goto error_return; | |
11980 | } | |
11981 | ||
11982 | /* If we have optimized stabs strings, output them. */ | |
3722b82f | 11983 | if (elf_hash_table (info)->stab_info.stabstr != NULL) |
c152c796 AM |
11984 | { |
11985 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
11986 | goto error_return; | |
11987 | } | |
11988 | ||
9f7c3e5e AM |
11989 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
11990 | goto error_return; | |
c152c796 | 11991 | |
9f7c3e5e | 11992 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 11993 | |
12bd6957 | 11994 | elf_linker (abfd) = TRUE; |
c152c796 | 11995 | |
104d59d1 JM |
11996 | if (attr_section) |
11997 | { | |
a50b1753 | 11998 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 11999 | if (contents == NULL) |
d0f16d5e | 12000 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
12001 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
12002 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
12003 | free (contents); | |
12004 | } | |
12005 | ||
c152c796 AM |
12006 | return TRUE; |
12007 | ||
12008 | error_return: | |
9f7c3e5e | 12009 | elf_final_link_free (abfd, &flinfo); |
c152c796 AM |
12010 | return FALSE; |
12011 | } | |
12012 | \f | |
5241d853 RS |
12013 | /* Initialize COOKIE for input bfd ABFD. */ |
12014 | ||
12015 | static bfd_boolean | |
12016 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
12017 | struct bfd_link_info *info, bfd *abfd) | |
12018 | { | |
12019 | Elf_Internal_Shdr *symtab_hdr; | |
12020 | const struct elf_backend_data *bed; | |
12021 | ||
12022 | bed = get_elf_backend_data (abfd); | |
12023 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12024 | ||
12025 | cookie->abfd = abfd; | |
12026 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
12027 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
12028 | if (cookie->bad_symtab) | |
12029 | { | |
12030 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
12031 | cookie->extsymoff = 0; | |
12032 | } | |
12033 | else | |
12034 | { | |
12035 | cookie->locsymcount = symtab_hdr->sh_info; | |
12036 | cookie->extsymoff = symtab_hdr->sh_info; | |
12037 | } | |
12038 | ||
12039 | if (bed->s->arch_size == 32) | |
12040 | cookie->r_sym_shift = 8; | |
12041 | else | |
12042 | cookie->r_sym_shift = 32; | |
12043 | ||
12044 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12045 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
12046 | { | |
12047 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
12048 | cookie->locsymcount, 0, | |
12049 | NULL, NULL, NULL); | |
12050 | if (cookie->locsyms == NULL) | |
12051 | { | |
12052 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
12053 | return FALSE; | |
12054 | } | |
12055 | if (info->keep_memory) | |
12056 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
12057 | } | |
12058 | return TRUE; | |
12059 | } | |
12060 | ||
12061 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
12062 | ||
12063 | static void | |
12064 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
12065 | { | |
12066 | Elf_Internal_Shdr *symtab_hdr; | |
12067 | ||
12068 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
12069 | if (cookie->locsyms != NULL | |
12070 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
12071 | free (cookie->locsyms); | |
12072 | } | |
12073 | ||
12074 | /* Initialize the relocation information in COOKIE for input section SEC | |
12075 | of input bfd ABFD. */ | |
12076 | ||
12077 | static bfd_boolean | |
12078 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12079 | struct bfd_link_info *info, bfd *abfd, | |
12080 | asection *sec) | |
12081 | { | |
12082 | const struct elf_backend_data *bed; | |
12083 | ||
12084 | if (sec->reloc_count == 0) | |
12085 | { | |
12086 | cookie->rels = NULL; | |
12087 | cookie->relend = NULL; | |
12088 | } | |
12089 | else | |
12090 | { | |
12091 | bed = get_elf_backend_data (abfd); | |
12092 | ||
12093 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
12094 | info->keep_memory); | |
12095 | if (cookie->rels == NULL) | |
12096 | return FALSE; | |
12097 | cookie->rel = cookie->rels; | |
12098 | cookie->relend = (cookie->rels | |
12099 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
12100 | } | |
12101 | cookie->rel = cookie->rels; | |
12102 | return TRUE; | |
12103 | } | |
12104 | ||
12105 | /* Free the memory allocated by init_reloc_cookie_rels, | |
12106 | if appropriate. */ | |
12107 | ||
12108 | static void | |
12109 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12110 | asection *sec) | |
12111 | { | |
12112 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
12113 | free (cookie->rels); | |
12114 | } | |
12115 | ||
12116 | /* Initialize the whole of COOKIE for input section SEC. */ | |
12117 | ||
12118 | static bfd_boolean | |
12119 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12120 | struct bfd_link_info *info, | |
12121 | asection *sec) | |
12122 | { | |
12123 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
12124 | goto error1; | |
12125 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
12126 | goto error2; | |
12127 | return TRUE; | |
12128 | ||
12129 | error2: | |
12130 | fini_reloc_cookie (cookie, sec->owner); | |
12131 | error1: | |
12132 | return FALSE; | |
12133 | } | |
12134 | ||
12135 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
12136 | if appropriate. */ | |
12137 | ||
12138 | static void | |
12139 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12140 | asection *sec) | |
12141 | { | |
12142 | fini_reloc_cookie_rels (cookie, sec); | |
12143 | fini_reloc_cookie (cookie, sec->owner); | |
12144 | } | |
12145 | \f | |
c152c796 AM |
12146 | /* Garbage collect unused sections. */ |
12147 | ||
07adf181 AM |
12148 | /* Default gc_mark_hook. */ |
12149 | ||
12150 | asection * | |
12151 | _bfd_elf_gc_mark_hook (asection *sec, | |
12152 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12153 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
12154 | struct elf_link_hash_entry *h, | |
12155 | Elf_Internal_Sym *sym) | |
12156 | { | |
12157 | if (h != NULL) | |
12158 | { | |
12159 | switch (h->root.type) | |
12160 | { | |
12161 | case bfd_link_hash_defined: | |
12162 | case bfd_link_hash_defweak: | |
12163 | return h->root.u.def.section; | |
12164 | ||
12165 | case bfd_link_hash_common: | |
12166 | return h->root.u.c.p->section; | |
12167 | ||
12168 | default: | |
12169 | break; | |
12170 | } | |
12171 | } | |
12172 | else | |
12173 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
12174 | ||
12175 | return NULL; | |
12176 | } | |
12177 | ||
5241d853 RS |
12178 | /* COOKIE->rel describes a relocation against section SEC, which is |
12179 | a section we've decided to keep. Return the section that contains | |
12180 | the relocation symbol, or NULL if no section contains it. */ | |
12181 | ||
12182 | asection * | |
12183 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
12184 | elf_gc_mark_hook_fn gc_mark_hook, | |
1cce69b9 AM |
12185 | struct elf_reloc_cookie *cookie, |
12186 | bfd_boolean *start_stop) | |
5241d853 RS |
12187 | { |
12188 | unsigned long r_symndx; | |
12189 | struct elf_link_hash_entry *h; | |
12190 | ||
12191 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 12192 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
12193 | return NULL; |
12194 | ||
12195 | if (r_symndx >= cookie->locsymcount | |
12196 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12197 | { | |
12198 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
263ddf68 L |
12199 | if (h == NULL) |
12200 | { | |
12201 | info->callbacks->einfo (_("%F%P: corrupt input: %B\n"), | |
12202 | sec->owner); | |
12203 | return NULL; | |
12204 | } | |
5241d853 RS |
12205 | while (h->root.type == bfd_link_hash_indirect |
12206 | || h->root.type == bfd_link_hash_warning) | |
12207 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 12208 | h->mark = 1; |
4e6b54a6 AM |
12209 | /* If this symbol is weak and there is a non-weak definition, we |
12210 | keep the non-weak definition because many backends put | |
12211 | dynamic reloc info on the non-weak definition for code | |
12212 | handling copy relocs. */ | |
12213 | if (h->u.weakdef != NULL) | |
12214 | h->u.weakdef->mark = 1; | |
1cce69b9 AM |
12215 | |
12216 | if (start_stop != NULL | |
12217 | && (h->root.type == bfd_link_hash_undefined | |
12218 | || h->root.type == bfd_link_hash_undefweak)) | |
12219 | { | |
12220 | /* To work around a glibc bug, mark all XXX input sections | |
12221 | when there is an as yet undefined reference to __start_XXX | |
12222 | or __stop_XXX symbols. The linker will later define such | |
12223 | symbols for orphan input sections that have a name | |
12224 | representable as a C identifier. */ | |
12225 | const char *sec_name = NULL; | |
12226 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
12227 | sec_name = h->root.root.string + 8; | |
12228 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
12229 | sec_name = h->root.root.string + 7; | |
12230 | ||
12231 | if (sec_name != NULL && *sec_name != '\0') | |
12232 | { | |
12233 | bfd *i; | |
12234 | ||
12235 | for (i = info->input_bfds; i != NULL; i = i->link.next) | |
12236 | { | |
12237 | asection *s = bfd_get_section_by_name (i, sec_name); | |
12238 | if (s != NULL && !s->gc_mark) | |
12239 | { | |
12240 | *start_stop = TRUE; | |
12241 | return s; | |
12242 | } | |
12243 | } | |
12244 | } | |
12245 | } | |
12246 | ||
5241d853 RS |
12247 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
12248 | } | |
12249 | ||
12250 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
12251 | &cookie->locsyms[r_symndx]); | |
12252 | } | |
12253 | ||
12254 | /* COOKIE->rel describes a relocation against section SEC, which is | |
12255 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 12256 | the relocation symbol. */ |
5241d853 RS |
12257 | |
12258 | bfd_boolean | |
12259 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
12260 | asection *sec, | |
12261 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 12262 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
12263 | { |
12264 | asection *rsec; | |
1cce69b9 | 12265 | bfd_boolean start_stop = FALSE; |
5241d853 | 12266 | |
1cce69b9 AM |
12267 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie, &start_stop); |
12268 | while (rsec != NULL) | |
5241d853 | 12269 | { |
1cce69b9 AM |
12270 | if (!rsec->gc_mark) |
12271 | { | |
12272 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour | |
12273 | || (rsec->owner->flags & DYNAMIC) != 0) | |
12274 | rsec->gc_mark = 1; | |
12275 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) | |
12276 | return FALSE; | |
12277 | } | |
12278 | if (!start_stop) | |
12279 | break; | |
199af150 | 12280 | rsec = bfd_get_next_section_by_name (rsec->owner, rsec); |
5241d853 RS |
12281 | } |
12282 | return TRUE; | |
12283 | } | |
12284 | ||
07adf181 AM |
12285 | /* The mark phase of garbage collection. For a given section, mark |
12286 | it and any sections in this section's group, and all the sections | |
12287 | which define symbols to which it refers. */ | |
12288 | ||
ccfa59ea AM |
12289 | bfd_boolean |
12290 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
12291 | asection *sec, | |
6a5bb875 | 12292 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
12293 | { |
12294 | bfd_boolean ret; | |
9d0a14d3 | 12295 | asection *group_sec, *eh_frame; |
c152c796 AM |
12296 | |
12297 | sec->gc_mark = 1; | |
12298 | ||
12299 | /* Mark all the sections in the group. */ | |
12300 | group_sec = elf_section_data (sec)->next_in_group; | |
12301 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 12302 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
12303 | return FALSE; |
12304 | ||
12305 | /* Look through the section relocs. */ | |
12306 | ret = TRUE; | |
9d0a14d3 RS |
12307 | eh_frame = elf_eh_frame_section (sec->owner); |
12308 | if ((sec->flags & SEC_RELOC) != 0 | |
12309 | && sec->reloc_count > 0 | |
12310 | && sec != eh_frame) | |
c152c796 | 12311 | { |
5241d853 | 12312 | struct elf_reloc_cookie cookie; |
c152c796 | 12313 | |
5241d853 RS |
12314 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
12315 | ret = FALSE; | |
c152c796 | 12316 | else |
c152c796 | 12317 | { |
5241d853 | 12318 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 12319 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
12320 | { |
12321 | ret = FALSE; | |
12322 | break; | |
12323 | } | |
12324 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
12325 | } |
12326 | } | |
9d0a14d3 RS |
12327 | |
12328 | if (ret && eh_frame && elf_fde_list (sec)) | |
12329 | { | |
12330 | struct elf_reloc_cookie cookie; | |
12331 | ||
12332 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
12333 | ret = FALSE; | |
12334 | else | |
12335 | { | |
12336 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
12337 | gc_mark_hook, &cookie)) | |
12338 | ret = FALSE; | |
12339 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
12340 | } | |
12341 | } | |
12342 | ||
2f0c68f2 CM |
12343 | eh_frame = elf_section_eh_frame_entry (sec); |
12344 | if (ret && eh_frame && !eh_frame->gc_mark) | |
12345 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
12346 | ret = FALSE; | |
12347 | ||
c152c796 AM |
12348 | return ret; |
12349 | } | |
12350 | ||
3c758495 TG |
12351 | /* Scan and mark sections in a special or debug section group. */ |
12352 | ||
12353 | static void | |
12354 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
12355 | { | |
12356 | /* Point to first section of section group. */ | |
12357 | asection *ssec; | |
12358 | /* Used to iterate the section group. */ | |
12359 | asection *msec; | |
12360 | ||
12361 | bfd_boolean is_special_grp = TRUE; | |
12362 | bfd_boolean is_debug_grp = TRUE; | |
12363 | ||
12364 | /* First scan to see if group contains any section other than debug | |
12365 | and special section. */ | |
12366 | ssec = msec = elf_next_in_group (grp); | |
12367 | do | |
12368 | { | |
12369 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
12370 | is_debug_grp = FALSE; | |
12371 | ||
12372 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
12373 | is_special_grp = FALSE; | |
12374 | ||
12375 | msec = elf_next_in_group (msec); | |
12376 | } | |
12377 | while (msec != ssec); | |
12378 | ||
12379 | /* If this is a pure debug section group or pure special section group, | |
12380 | keep all sections in this group. */ | |
12381 | if (is_debug_grp || is_special_grp) | |
12382 | { | |
12383 | do | |
12384 | { | |
12385 | msec->gc_mark = 1; | |
12386 | msec = elf_next_in_group (msec); | |
12387 | } | |
12388 | while (msec != ssec); | |
12389 | } | |
12390 | } | |
12391 | ||
7f6ab9f8 AM |
12392 | /* Keep debug and special sections. */ |
12393 | ||
12394 | bfd_boolean | |
12395 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
12396 | elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) | |
12397 | { | |
12398 | bfd *ibfd; | |
12399 | ||
c72f2fb2 | 12400 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
12401 | { |
12402 | asection *isec; | |
12403 | bfd_boolean some_kept; | |
b40bf0a2 | 12404 | bfd_boolean debug_frag_seen; |
7f6ab9f8 AM |
12405 | |
12406 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12407 | continue; | |
12408 | ||
b40bf0a2 NC |
12409 | /* Ensure all linker created sections are kept, |
12410 | see if any other section is already marked, | |
12411 | and note if we have any fragmented debug sections. */ | |
12412 | debug_frag_seen = some_kept = FALSE; | |
7f6ab9f8 AM |
12413 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
12414 | { | |
12415 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
12416 | isec->gc_mark = 1; | |
12417 | else if (isec->gc_mark) | |
12418 | some_kept = TRUE; | |
b40bf0a2 NC |
12419 | |
12420 | if (debug_frag_seen == FALSE | |
12421 | && (isec->flags & SEC_DEBUGGING) | |
12422 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
12423 | debug_frag_seen = TRUE; | |
7f6ab9f8 AM |
12424 | } |
12425 | ||
12426 | /* If no section in this file will be kept, then we can | |
b40bf0a2 | 12427 | toss out the debug and special sections. */ |
7f6ab9f8 AM |
12428 | if (!some_kept) |
12429 | continue; | |
12430 | ||
12431 | /* Keep debug and special sections like .comment when they are | |
3c758495 TG |
12432 | not part of a group. Also keep section groups that contain |
12433 | just debug sections or special sections. */ | |
7f6ab9f8 | 12434 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
12435 | { |
12436 | if ((isec->flags & SEC_GROUP) != 0) | |
12437 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
12438 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
12439 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
12440 | && elf_next_in_group (isec) == NULL) | |
12441 | isec->gc_mark = 1; | |
12442 | } | |
b40bf0a2 NC |
12443 | |
12444 | if (! debug_frag_seen) | |
12445 | continue; | |
12446 | ||
12447 | /* Look for CODE sections which are going to be discarded, | |
12448 | and find and discard any fragmented debug sections which | |
12449 | are associated with that code section. */ | |
12450 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
12451 | if ((isec->flags & SEC_CODE) != 0 | |
12452 | && isec->gc_mark == 0) | |
12453 | { | |
12454 | unsigned int ilen; | |
12455 | asection *dsec; | |
12456 | ||
12457 | ilen = strlen (isec->name); | |
12458 | ||
12459 | /* Association is determined by the name of the debug section | |
12460 | containing the name of the code section as a suffix. For | |
12461 | example .debug_line.text.foo is a debug section associated | |
12462 | with .text.foo. */ | |
12463 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
12464 | { | |
12465 | unsigned int dlen; | |
12466 | ||
12467 | if (dsec->gc_mark == 0 | |
12468 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
12469 | continue; | |
12470 | ||
12471 | dlen = strlen (dsec->name); | |
12472 | ||
12473 | if (dlen > ilen | |
12474 | && strncmp (dsec->name + (dlen - ilen), | |
12475 | isec->name, ilen) == 0) | |
12476 | { | |
12477 | dsec->gc_mark = 0; | |
b40bf0a2 NC |
12478 | } |
12479 | } | |
12480 | } | |
7f6ab9f8 AM |
12481 | } |
12482 | return TRUE; | |
12483 | } | |
12484 | ||
c152c796 AM |
12485 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
12486 | ||
c17d87de NC |
12487 | struct elf_gc_sweep_symbol_info |
12488 | { | |
ccabcbe5 AM |
12489 | struct bfd_link_info *info; |
12490 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
12491 | bfd_boolean); | |
12492 | }; | |
12493 | ||
c152c796 | 12494 | static bfd_boolean |
ccabcbe5 | 12495 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 12496 | { |
1d5316ab AM |
12497 | if (!h->mark |
12498 | && (((h->root.type == bfd_link_hash_defined | |
12499 | || h->root.type == bfd_link_hash_defweak) | |
c4621b33 | 12500 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) |
6673f753 | 12501 | && h->root.u.def.section->gc_mark)) |
1d5316ab AM |
12502 | || h->root.type == bfd_link_hash_undefined |
12503 | || h->root.type == bfd_link_hash_undefweak)) | |
12504 | { | |
12505 | struct elf_gc_sweep_symbol_info *inf; | |
12506 | ||
12507 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 | 12508 | (*inf->hide_symbol) (inf->info, h, TRUE); |
1d5316ab AM |
12509 | h->def_regular = 0; |
12510 | h->ref_regular = 0; | |
12511 | h->ref_regular_nonweak = 0; | |
ccabcbe5 | 12512 | } |
c152c796 AM |
12513 | |
12514 | return TRUE; | |
12515 | } | |
12516 | ||
12517 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
12518 | ||
12519 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
12520 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
12521 | ||
12522 | static bfd_boolean | |
ccabcbe5 | 12523 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
12524 | { |
12525 | bfd *sub; | |
ccabcbe5 AM |
12526 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12527 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
12528 | unsigned long section_sym_count; | |
12529 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 | 12530 | |
c72f2fb2 | 12531 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12532 | { |
12533 | asection *o; | |
12534 | ||
b19a8f85 L |
12535 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12536 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12537 | continue; |
12538 | ||
12539 | for (o = sub->sections; o != NULL; o = o->next) | |
12540 | { | |
a33dafc3 L |
12541 | /* When any section in a section group is kept, we keep all |
12542 | sections in the section group. If the first member of | |
12543 | the section group is excluded, we will also exclude the | |
12544 | group section. */ | |
12545 | if (o->flags & SEC_GROUP) | |
12546 | { | |
12547 | asection *first = elf_next_in_group (o); | |
12548 | o->gc_mark = first->gc_mark; | |
12549 | } | |
c152c796 | 12550 | |
1e7eae0d | 12551 | if (o->gc_mark) |
c152c796 AM |
12552 | continue; |
12553 | ||
12554 | /* Skip sweeping sections already excluded. */ | |
12555 | if (o->flags & SEC_EXCLUDE) | |
12556 | continue; | |
12557 | ||
12558 | /* Since this is early in the link process, it is simple | |
12559 | to remove a section from the output. */ | |
12560 | o->flags |= SEC_EXCLUDE; | |
12561 | ||
c55fe096 | 12562 | if (info->print_gc_sections && o->size != 0) |
c17d87de NC |
12563 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
12564 | ||
c152c796 AM |
12565 | /* But we also have to update some of the relocation |
12566 | info we collected before. */ | |
12567 | if (gc_sweep_hook | |
e8aaee2a | 12568 | && (o->flags & SEC_RELOC) != 0 |
9850436d AM |
12569 | && o->reloc_count != 0 |
12570 | && !((info->strip == strip_all || info->strip == strip_debugger) | |
12571 | && (o->flags & SEC_DEBUGGING) != 0) | |
e8aaee2a | 12572 | && !bfd_is_abs_section (o->output_section)) |
c152c796 AM |
12573 | { |
12574 | Elf_Internal_Rela *internal_relocs; | |
12575 | bfd_boolean r; | |
12576 | ||
12577 | internal_relocs | |
12578 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
12579 | info->keep_memory); | |
12580 | if (internal_relocs == NULL) | |
12581 | return FALSE; | |
12582 | ||
12583 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
12584 | ||
12585 | if (elf_section_data (o)->relocs != internal_relocs) | |
12586 | free (internal_relocs); | |
12587 | ||
12588 | if (!r) | |
12589 | return FALSE; | |
12590 | } | |
12591 | } | |
12592 | } | |
12593 | ||
12594 | /* Remove the symbols that were in the swept sections from the dynamic | |
12595 | symbol table. GCFIXME: Anyone know how to get them out of the | |
12596 | static symbol table as well? */ | |
ccabcbe5 AM |
12597 | sweep_info.info = info; |
12598 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
12599 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
12600 | &sweep_info); | |
c152c796 | 12601 | |
ccabcbe5 | 12602 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
12603 | return TRUE; |
12604 | } | |
12605 | ||
12606 | /* Propagate collected vtable information. This is called through | |
12607 | elf_link_hash_traverse. */ | |
12608 | ||
12609 | static bfd_boolean | |
12610 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
12611 | { | |
c152c796 | 12612 | /* Those that are not vtables. */ |
f6e332e6 | 12613 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12614 | return TRUE; |
12615 | ||
12616 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 12617 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
12618 | return TRUE; |
12619 | ||
12620 | /* If we've already been done, exit. */ | |
f6e332e6 | 12621 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
12622 | return TRUE; |
12623 | ||
12624 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 12625 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 12626 | |
f6e332e6 | 12627 | if (h->vtable->used == NULL) |
c152c796 AM |
12628 | { |
12629 | /* None of this table's entries were referenced. Re-use the | |
12630 | parent's table. */ | |
f6e332e6 AM |
12631 | h->vtable->used = h->vtable->parent->vtable->used; |
12632 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
12633 | } |
12634 | else | |
12635 | { | |
12636 | size_t n; | |
12637 | bfd_boolean *cu, *pu; | |
12638 | ||
12639 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 12640 | cu = h->vtable->used; |
c152c796 | 12641 | cu[-1] = TRUE; |
f6e332e6 | 12642 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
12643 | if (pu != NULL) |
12644 | { | |
12645 | const struct elf_backend_data *bed; | |
12646 | unsigned int log_file_align; | |
12647 | ||
12648 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
12649 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 12650 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
12651 | while (n--) |
12652 | { | |
12653 | if (*pu) | |
12654 | *cu = TRUE; | |
12655 | pu++; | |
12656 | cu++; | |
12657 | } | |
12658 | } | |
12659 | } | |
12660 | ||
12661 | return TRUE; | |
12662 | } | |
12663 | ||
12664 | static bfd_boolean | |
12665 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
12666 | { | |
12667 | asection *sec; | |
12668 | bfd_vma hstart, hend; | |
12669 | Elf_Internal_Rela *relstart, *relend, *rel; | |
12670 | const struct elf_backend_data *bed; | |
12671 | unsigned int log_file_align; | |
12672 | ||
c152c796 AM |
12673 | /* Take care of both those symbols that do not describe vtables as |
12674 | well as those that are not loaded. */ | |
f6e332e6 | 12675 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12676 | return TRUE; |
12677 | ||
12678 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
12679 | || h->root.type == bfd_link_hash_defweak); | |
12680 | ||
12681 | sec = h->root.u.def.section; | |
12682 | hstart = h->root.u.def.value; | |
12683 | hend = hstart + h->size; | |
12684 | ||
12685 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
12686 | if (!relstart) | |
12687 | return *(bfd_boolean *) okp = FALSE; | |
12688 | bed = get_elf_backend_data (sec->owner); | |
12689 | log_file_align = bed->s->log_file_align; | |
12690 | ||
12691 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
12692 | ||
12693 | for (rel = relstart; rel < relend; ++rel) | |
12694 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
12695 | { | |
12696 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
12697 | if (h->vtable->used |
12698 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
12699 | { |
12700 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 12701 | if (h->vtable->used[entry]) |
c152c796 AM |
12702 | continue; |
12703 | } | |
12704 | /* Otherwise, kill it. */ | |
12705 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
12706 | } | |
12707 | ||
12708 | return TRUE; | |
12709 | } | |
12710 | ||
87538722 AM |
12711 | /* Mark sections containing dynamically referenced symbols. When |
12712 | building shared libraries, we must assume that any visible symbol is | |
12713 | referenced. */ | |
715df9b8 | 12714 | |
64d03ab5 AM |
12715 | bfd_boolean |
12716 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 12717 | { |
87538722 | 12718 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 12719 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 12720 | |
715df9b8 EB |
12721 | if ((h->root.type == bfd_link_hash_defined |
12722 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 12723 | && (h->ref_dynamic |
c4621b33 | 12724 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 12725 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 12726 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 12727 | && (!bfd_link_executable (info) |
b407645f AM |
12728 | || info->export_dynamic |
12729 | || (h->dynamic | |
12730 | && d != NULL | |
12731 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 12732 | && (h->versioned >= versioned |
54e8959c L |
12733 | || !bfd_hide_sym_by_version (info->version_info, |
12734 | h->root.root.string))))) | |
715df9b8 EB |
12735 | h->root.u.def.section->flags |= SEC_KEEP; |
12736 | ||
12737 | return TRUE; | |
12738 | } | |
3b36f7e6 | 12739 | |
74f0fb50 AM |
12740 | /* Keep all sections containing symbols undefined on the command-line, |
12741 | and the section containing the entry symbol. */ | |
12742 | ||
12743 | void | |
12744 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
12745 | { | |
12746 | struct bfd_sym_chain *sym; | |
12747 | ||
12748 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
12749 | { | |
12750 | struct elf_link_hash_entry *h; | |
12751 | ||
12752 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
12753 | FALSE, FALSE, FALSE); | |
12754 | ||
12755 | if (h != NULL | |
12756 | && (h->root.type == bfd_link_hash_defined | |
12757 | || h->root.type == bfd_link_hash_defweak) | |
12758 | && !bfd_is_abs_section (h->root.u.def.section)) | |
12759 | h->root.u.def.section->flags |= SEC_KEEP; | |
12760 | } | |
12761 | } | |
12762 | ||
2f0c68f2 CM |
12763 | bfd_boolean |
12764 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, | |
12765 | struct bfd_link_info *info) | |
12766 | { | |
12767 | bfd *ibfd = info->input_bfds; | |
12768 | ||
12769 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
12770 | { | |
12771 | asection *sec; | |
12772 | struct elf_reloc_cookie cookie; | |
12773 | ||
12774 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12775 | continue; | |
12776 | ||
12777 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
12778 | return FALSE; | |
12779 | ||
12780 | for (sec = ibfd->sections; sec; sec = sec->next) | |
12781 | { | |
12782 | if (CONST_STRNEQ (bfd_section_name (ibfd, sec), ".eh_frame_entry") | |
12783 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) | |
12784 | { | |
12785 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
12786 | fini_reloc_cookie_rels (&cookie, sec); | |
12787 | } | |
12788 | } | |
12789 | } | |
12790 | return TRUE; | |
12791 | } | |
12792 | ||
c152c796 AM |
12793 | /* Do mark and sweep of unused sections. */ |
12794 | ||
12795 | bfd_boolean | |
12796 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
12797 | { | |
12798 | bfd_boolean ok = TRUE; | |
12799 | bfd *sub; | |
6a5bb875 | 12800 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 12801 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 12802 | struct elf_link_hash_table *htab; |
c152c796 | 12803 | |
64d03ab5 | 12804 | if (!bed->can_gc_sections |
715df9b8 | 12805 | || !is_elf_hash_table (info->hash)) |
c152c796 AM |
12806 | { |
12807 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
12808 | return TRUE; | |
12809 | } | |
12810 | ||
74f0fb50 | 12811 | bed->gc_keep (info); |
da44f4e5 | 12812 | htab = elf_hash_table (info); |
74f0fb50 | 12813 | |
9d0a14d3 RS |
12814 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
12815 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
12816 | for (sub = info->input_bfds; |
12817 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
12818 | sub = sub->link.next) | |
9d0a14d3 RS |
12819 | { |
12820 | asection *sec; | |
12821 | struct elf_reloc_cookie cookie; | |
12822 | ||
12823 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
9a2a56cc | 12824 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
12825 | { |
12826 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
12827 | if (elf_section_data (sec)->sec_info |
12828 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
12829 | elf_eh_frame_section (sub) = sec; |
12830 | fini_reloc_cookie_for_section (&cookie, sec); | |
199af150 | 12831 | sec = bfd_get_next_section_by_name (NULL, sec); |
9d0a14d3 RS |
12832 | } |
12833 | } | |
9d0a14d3 | 12834 | |
c152c796 | 12835 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 12836 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 AM |
12837 | if (!ok) |
12838 | return FALSE; | |
12839 | ||
12840 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 12841 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 AM |
12842 | if (!ok) |
12843 | return FALSE; | |
12844 | ||
715df9b8 | 12845 | /* Mark dynamically referenced symbols. */ |
da44f4e5 AM |
12846 | if (htab->dynamic_sections_created) |
12847 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); | |
c152c796 | 12848 | |
715df9b8 | 12849 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 12850 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 12851 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12852 | { |
12853 | asection *o; | |
12854 | ||
b19a8f85 L |
12855 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12856 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12857 | continue; |
12858 | ||
7f6ab9f8 AM |
12859 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
12860 | Also treat note sections as a root, if the section is not part | |
12861 | of a group. */ | |
c152c796 | 12862 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
12863 | if (!o->gc_mark |
12864 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 12865 | && ((o->flags & SEC_KEEP) != 0 |
7f6ab9f8 AM |
12866 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
12867 | && elf_next_in_group (o) == NULL ))) | |
12868 | { | |
12869 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
12870 | return FALSE; | |
12871 | } | |
c152c796 AM |
12872 | } |
12873 | ||
6a5bb875 | 12874 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 12875 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 12876 | |
c152c796 | 12877 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 12878 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
12879 | } |
12880 | \f | |
12881 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
12882 | ||
12883 | bfd_boolean | |
12884 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
12885 | asection *sec, | |
12886 | struct elf_link_hash_entry *h, | |
12887 | bfd_vma offset) | |
12888 | { | |
12889 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
12890 | struct elf_link_hash_entry **search, *child; | |
12891 | bfd_size_type extsymcount; | |
12892 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12893 | ||
12894 | /* The sh_info field of the symtab header tells us where the | |
12895 | external symbols start. We don't care about the local symbols at | |
12896 | this point. */ | |
12897 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
12898 | if (!elf_bad_symtab (abfd)) | |
12899 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
12900 | ||
12901 | sym_hashes = elf_sym_hashes (abfd); | |
12902 | sym_hashes_end = sym_hashes + extsymcount; | |
12903 | ||
12904 | /* Hunt down the child symbol, which is in this section at the same | |
12905 | offset as the relocation. */ | |
12906 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
12907 | { | |
12908 | if ((child = *search) != NULL | |
12909 | && (child->root.type == bfd_link_hash_defined | |
12910 | || child->root.type == bfd_link_hash_defweak) | |
12911 | && child->root.u.def.section == sec | |
12912 | && child->root.u.def.value == offset) | |
12913 | goto win; | |
12914 | } | |
12915 | ||
d003868e AM |
12916 | (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT", |
12917 | abfd, sec, (unsigned long) offset); | |
c152c796 AM |
12918 | bfd_set_error (bfd_error_invalid_operation); |
12919 | return FALSE; | |
12920 | ||
12921 | win: | |
f6e332e6 AM |
12922 | if (!child->vtable) |
12923 | { | |
ca4be51c AM |
12924 | child->vtable = ((struct elf_link_virtual_table_entry *) |
12925 | bfd_zalloc (abfd, sizeof (*child->vtable))); | |
f6e332e6 AM |
12926 | if (!child->vtable) |
12927 | return FALSE; | |
12928 | } | |
c152c796 AM |
12929 | if (!h) |
12930 | { | |
12931 | /* This *should* only be the absolute section. It could potentially | |
12932 | be that someone has defined a non-global vtable though, which | |
12933 | would be bad. It isn't worth paging in the local symbols to be | |
12934 | sure though; that case should simply be handled by the assembler. */ | |
12935 | ||
f6e332e6 | 12936 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
12937 | } |
12938 | else | |
f6e332e6 | 12939 | child->vtable->parent = h; |
c152c796 AM |
12940 | |
12941 | return TRUE; | |
12942 | } | |
12943 | ||
12944 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
12945 | ||
12946 | bfd_boolean | |
12947 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
12948 | asection *sec ATTRIBUTE_UNUSED, | |
12949 | struct elf_link_hash_entry *h, | |
12950 | bfd_vma addend) | |
12951 | { | |
12952 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12953 | unsigned int log_file_align = bed->s->log_file_align; | |
12954 | ||
f6e332e6 AM |
12955 | if (!h->vtable) |
12956 | { | |
ca4be51c AM |
12957 | h->vtable = ((struct elf_link_virtual_table_entry *) |
12958 | bfd_zalloc (abfd, sizeof (*h->vtable))); | |
f6e332e6 AM |
12959 | if (!h->vtable) |
12960 | return FALSE; | |
12961 | } | |
12962 | ||
12963 | if (addend >= h->vtable->size) | |
c152c796 AM |
12964 | { |
12965 | size_t size, bytes, file_align; | |
f6e332e6 | 12966 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
12967 | |
12968 | /* While the symbol is undefined, we have to be prepared to handle | |
12969 | a zero size. */ | |
12970 | file_align = 1 << log_file_align; | |
12971 | if (h->root.type == bfd_link_hash_undefined) | |
12972 | size = addend + file_align; | |
12973 | else | |
12974 | { | |
12975 | size = h->size; | |
12976 | if (addend >= size) | |
12977 | { | |
12978 | /* Oops! We've got a reference past the defined end of | |
12979 | the table. This is probably a bug -- shall we warn? */ | |
12980 | size = addend + file_align; | |
12981 | } | |
12982 | } | |
12983 | size = (size + file_align - 1) & -file_align; | |
12984 | ||
12985 | /* Allocate one extra entry for use as a "done" flag for the | |
12986 | consolidation pass. */ | |
12987 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
12988 | ||
12989 | if (ptr) | |
12990 | { | |
a50b1753 | 12991 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
12992 | |
12993 | if (ptr != NULL) | |
12994 | { | |
12995 | size_t oldbytes; | |
12996 | ||
f6e332e6 | 12997 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
12998 | * sizeof (bfd_boolean)); |
12999 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
13000 | } | |
13001 | } | |
13002 | else | |
a50b1753 | 13003 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
13004 | |
13005 | if (ptr == NULL) | |
13006 | return FALSE; | |
13007 | ||
13008 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
13009 | h->vtable->used = ptr + 1; |
13010 | h->vtable->size = size; | |
c152c796 AM |
13011 | } |
13012 | ||
f6e332e6 | 13013 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
13014 | |
13015 | return TRUE; | |
13016 | } | |
13017 | ||
ae17ab41 CM |
13018 | /* Map an ELF section header flag to its corresponding string. */ |
13019 | typedef struct | |
13020 | { | |
13021 | char *flag_name; | |
13022 | flagword flag_value; | |
13023 | } elf_flags_to_name_table; | |
13024 | ||
13025 | static elf_flags_to_name_table elf_flags_to_names [] = | |
13026 | { | |
13027 | { "SHF_WRITE", SHF_WRITE }, | |
13028 | { "SHF_ALLOC", SHF_ALLOC }, | |
13029 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
13030 | { "SHF_MERGE", SHF_MERGE }, | |
13031 | { "SHF_STRINGS", SHF_STRINGS }, | |
13032 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
13033 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
13034 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
13035 | { "SHF_GROUP", SHF_GROUP }, | |
13036 | { "SHF_TLS", SHF_TLS }, | |
13037 | { "SHF_MASKOS", SHF_MASKOS }, | |
13038 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
13039 | }; | |
13040 | ||
b9c361e0 JL |
13041 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
13042 | bfd_boolean | |
ae17ab41 | 13043 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 13044 | struct flag_info *flaginfo, |
b9c361e0 | 13045 | asection *section) |
ae17ab41 | 13046 | { |
8b127cbc | 13047 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 13048 | |
8b127cbc | 13049 | if (!flaginfo->flags_initialized) |
ae17ab41 | 13050 | { |
8b127cbc AM |
13051 | bfd *obfd = info->output_bfd; |
13052 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
13053 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
13054 | int with_hex = 0; |
13055 | int without_hex = 0; | |
13056 | ||
8b127cbc | 13057 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 13058 | { |
b9c361e0 | 13059 | unsigned i; |
8b127cbc | 13060 | flagword (*lookup) (char *); |
ae17ab41 | 13061 | |
8b127cbc AM |
13062 | lookup = bed->elf_backend_lookup_section_flags_hook; |
13063 | if (lookup != NULL) | |
ae17ab41 | 13064 | { |
8b127cbc | 13065 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
13066 | |
13067 | if (hexval != 0) | |
13068 | { | |
13069 | if (tf->with == with_flags) | |
13070 | with_hex |= hexval; | |
13071 | else if (tf->with == without_flags) | |
13072 | without_hex |= hexval; | |
13073 | tf->valid = TRUE; | |
13074 | continue; | |
13075 | } | |
ae17ab41 | 13076 | } |
8b127cbc | 13077 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 13078 | { |
8b127cbc | 13079 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
13080 | { |
13081 | if (tf->with == with_flags) | |
13082 | with_hex |= elf_flags_to_names[i].flag_value; | |
13083 | else if (tf->with == without_flags) | |
13084 | without_hex |= elf_flags_to_names[i].flag_value; | |
13085 | tf->valid = TRUE; | |
13086 | break; | |
13087 | } | |
13088 | } | |
8b127cbc | 13089 | if (!tf->valid) |
b9c361e0 | 13090 | { |
68ffbac6 | 13091 | info->callbacks->einfo |
8b127cbc | 13092 | (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 13093 | return FALSE; |
ae17ab41 CM |
13094 | } |
13095 | } | |
8b127cbc AM |
13096 | flaginfo->flags_initialized = TRUE; |
13097 | flaginfo->only_with_flags |= with_hex; | |
13098 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 13099 | } |
ae17ab41 | 13100 | |
8b127cbc | 13101 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
13102 | return FALSE; |
13103 | ||
8b127cbc | 13104 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
13105 | return FALSE; |
13106 | ||
13107 | return TRUE; | |
ae17ab41 CM |
13108 | } |
13109 | ||
c152c796 AM |
13110 | struct alloc_got_off_arg { |
13111 | bfd_vma gotoff; | |
10455f89 | 13112 | struct bfd_link_info *info; |
c152c796 AM |
13113 | }; |
13114 | ||
13115 | /* We need a special top-level link routine to convert got reference counts | |
13116 | to real got offsets. */ | |
13117 | ||
13118 | static bfd_boolean | |
13119 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
13120 | { | |
a50b1753 | 13121 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
13122 | bfd *obfd = gofarg->info->output_bfd; |
13123 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 13124 | |
c152c796 AM |
13125 | if (h->got.refcount > 0) |
13126 | { | |
13127 | h->got.offset = gofarg->gotoff; | |
10455f89 | 13128 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
13129 | } |
13130 | else | |
13131 | h->got.offset = (bfd_vma) -1; | |
13132 | ||
13133 | return TRUE; | |
13134 | } | |
13135 | ||
13136 | /* And an accompanying bit to work out final got entry offsets once | |
13137 | we're done. Should be called from final_link. */ | |
13138 | ||
13139 | bfd_boolean | |
13140 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
13141 | struct bfd_link_info *info) | |
13142 | { | |
13143 | bfd *i; | |
13144 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13145 | bfd_vma gotoff; | |
c152c796 AM |
13146 | struct alloc_got_off_arg gofarg; |
13147 | ||
10455f89 HPN |
13148 | BFD_ASSERT (abfd == info->output_bfd); |
13149 | ||
c152c796 AM |
13150 | if (! is_elf_hash_table (info->hash)) |
13151 | return FALSE; | |
13152 | ||
13153 | /* The GOT offset is relative to the .got section, but the GOT header is | |
13154 | put into the .got.plt section, if the backend uses it. */ | |
13155 | if (bed->want_got_plt) | |
13156 | gotoff = 0; | |
13157 | else | |
13158 | gotoff = bed->got_header_size; | |
13159 | ||
13160 | /* Do the local .got entries first. */ | |
c72f2fb2 | 13161 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
13162 | { |
13163 | bfd_signed_vma *local_got; | |
13164 | bfd_size_type j, locsymcount; | |
13165 | Elf_Internal_Shdr *symtab_hdr; | |
13166 | ||
13167 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
13168 | continue; | |
13169 | ||
13170 | local_got = elf_local_got_refcounts (i); | |
13171 | if (!local_got) | |
13172 | continue; | |
13173 | ||
13174 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
13175 | if (elf_bad_symtab (i)) | |
13176 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13177 | else | |
13178 | locsymcount = symtab_hdr->sh_info; | |
13179 | ||
13180 | for (j = 0; j < locsymcount; ++j) | |
13181 | { | |
13182 | if (local_got[j] > 0) | |
13183 | { | |
13184 | local_got[j] = gotoff; | |
10455f89 | 13185 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
13186 | } |
13187 | else | |
13188 | local_got[j] = (bfd_vma) -1; | |
13189 | } | |
13190 | } | |
13191 | ||
13192 | /* Then the global .got entries. .plt refcounts are handled by | |
13193 | adjust_dynamic_symbol */ | |
13194 | gofarg.gotoff = gotoff; | |
10455f89 | 13195 | gofarg.info = info; |
c152c796 AM |
13196 | elf_link_hash_traverse (elf_hash_table (info), |
13197 | elf_gc_allocate_got_offsets, | |
13198 | &gofarg); | |
13199 | return TRUE; | |
13200 | } | |
13201 | ||
13202 | /* Many folk need no more in the way of final link than this, once | |
13203 | got entry reference counting is enabled. */ | |
13204 | ||
13205 | bfd_boolean | |
13206 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
13207 | { | |
13208 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
13209 | return FALSE; | |
13210 | ||
13211 | /* Invoke the regular ELF backend linker to do all the work. */ | |
13212 | return bfd_elf_final_link (abfd, info); | |
13213 | } | |
13214 | ||
13215 | bfd_boolean | |
13216 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
13217 | { | |
a50b1753 | 13218 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
13219 | |
13220 | if (rcookie->bad_symtab) | |
13221 | rcookie->rel = rcookie->rels; | |
13222 | ||
13223 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
13224 | { | |
13225 | unsigned long r_symndx; | |
13226 | ||
13227 | if (! rcookie->bad_symtab) | |
13228 | if (rcookie->rel->r_offset > offset) | |
13229 | return FALSE; | |
13230 | if (rcookie->rel->r_offset != offset) | |
13231 | continue; | |
13232 | ||
13233 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 13234 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
13235 | return TRUE; |
13236 | ||
13237 | if (r_symndx >= rcookie->locsymcount | |
13238 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13239 | { | |
13240 | struct elf_link_hash_entry *h; | |
13241 | ||
13242 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
13243 | ||
13244 | while (h->root.type == bfd_link_hash_indirect | |
13245 | || h->root.type == bfd_link_hash_warning) | |
13246 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
13247 | ||
13248 | if ((h->root.type == bfd_link_hash_defined | |
13249 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
13250 | && (h->root.u.def.section->owner != rcookie->abfd |
13251 | || h->root.u.def.section->kept_section != NULL | |
13252 | || discarded_section (h->root.u.def.section))) | |
c152c796 | 13253 | return TRUE; |
c152c796 AM |
13254 | } |
13255 | else | |
13256 | { | |
13257 | /* It's not a relocation against a global symbol, | |
13258 | but it could be a relocation against a local | |
13259 | symbol for a discarded section. */ | |
13260 | asection *isec; | |
13261 | Elf_Internal_Sym *isym; | |
13262 | ||
13263 | /* Need to: get the symbol; get the section. */ | |
13264 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 13265 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
13266 | if (isec != NULL |
13267 | && (isec->kept_section != NULL | |
13268 | || discarded_section (isec))) | |
cb33740c | 13269 | return TRUE; |
c152c796 AM |
13270 | } |
13271 | return FALSE; | |
13272 | } | |
13273 | return FALSE; | |
13274 | } | |
13275 | ||
13276 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
13277 | Returns -1 on error, 1 if any section's size was changed, 0 if |
13278 | nothing changed. This function assumes that the relocations are in | |
13279 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 13280 | |
75938853 | 13281 | int |
c152c796 AM |
13282 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
13283 | { | |
13284 | struct elf_reloc_cookie cookie; | |
18cd5bce | 13285 | asection *o; |
c152c796 | 13286 | bfd *abfd; |
75938853 | 13287 | int changed = 0; |
c152c796 AM |
13288 | |
13289 | if (info->traditional_format | |
13290 | || !is_elf_hash_table (info->hash)) | |
75938853 | 13291 | return 0; |
c152c796 | 13292 | |
18cd5bce AM |
13293 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
13294 | if (o != NULL) | |
c152c796 | 13295 | { |
18cd5bce | 13296 | asection *i; |
c152c796 | 13297 | |
18cd5bce | 13298 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 13299 | { |
18cd5bce AM |
13300 | if (i->size == 0 |
13301 | || i->reloc_count == 0 | |
13302 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
13303 | continue; | |
c152c796 | 13304 | |
18cd5bce AM |
13305 | abfd = i->owner; |
13306 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13307 | continue; | |
c152c796 | 13308 | |
18cd5bce | 13309 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 13310 | return -1; |
c152c796 | 13311 | |
18cd5bce AM |
13312 | if (_bfd_discard_section_stabs (abfd, i, |
13313 | elf_section_data (i)->sec_info, | |
5241d853 RS |
13314 | bfd_elf_reloc_symbol_deleted_p, |
13315 | &cookie)) | |
75938853 | 13316 | changed = 1; |
18cd5bce AM |
13317 | |
13318 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13319 | } |
18cd5bce AM |
13320 | } |
13321 | ||
2f0c68f2 CM |
13322 | o = NULL; |
13323 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
13324 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
13325 | if (o != NULL) |
13326 | { | |
13327 | asection *i; | |
c152c796 | 13328 | |
18cd5bce | 13329 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 13330 | { |
18cd5bce AM |
13331 | if (i->size == 0) |
13332 | continue; | |
13333 | ||
13334 | abfd = i->owner; | |
13335 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13336 | continue; | |
13337 | ||
13338 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 13339 | return -1; |
18cd5bce AM |
13340 | |
13341 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
13342 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
13343 | bfd_elf_reloc_symbol_deleted_p, |
13344 | &cookie)) | |
75938853 | 13345 | changed = 1; |
18cd5bce AM |
13346 | |
13347 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13348 | } |
18cd5bce | 13349 | } |
c152c796 | 13350 | |
18cd5bce AM |
13351 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
13352 | { | |
13353 | const struct elf_backend_data *bed; | |
c152c796 | 13354 | |
18cd5bce AM |
13355 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
13356 | continue; | |
13357 | ||
13358 | bed = get_elf_backend_data (abfd); | |
13359 | ||
13360 | if (bed->elf_backend_discard_info != NULL) | |
13361 | { | |
13362 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 13363 | return -1; |
18cd5bce AM |
13364 | |
13365 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 13366 | changed = 1; |
18cd5bce AM |
13367 | |
13368 | fini_reloc_cookie (&cookie, abfd); | |
13369 | } | |
c152c796 AM |
13370 | } |
13371 | ||
2f0c68f2 CM |
13372 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
13373 | _bfd_elf_end_eh_frame_parsing (info); | |
13374 | ||
13375 | if (info->eh_frame_hdr_type | |
0e1862bb | 13376 | && !bfd_link_relocatable (info) |
c152c796 | 13377 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 13378 | changed = 1; |
c152c796 | 13379 | |
75938853 | 13380 | return changed; |
c152c796 | 13381 | } |
082b7297 | 13382 | |
43e1669b | 13383 | bfd_boolean |
0c511000 | 13384 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 13385 | asection *sec, |
c0f00686 | 13386 | struct bfd_link_info *info) |
082b7297 L |
13387 | { |
13388 | flagword flags; | |
c77ec726 | 13389 | const char *name, *key; |
082b7297 L |
13390 | struct bfd_section_already_linked *l; |
13391 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 13392 | |
c77ec726 AM |
13393 | if (sec->output_section == bfd_abs_section_ptr) |
13394 | return FALSE; | |
0c511000 | 13395 | |
c77ec726 | 13396 | flags = sec->flags; |
0c511000 | 13397 | |
c77ec726 AM |
13398 | /* Return if it isn't a linkonce section. A comdat group section |
13399 | also has SEC_LINK_ONCE set. */ | |
13400 | if ((flags & SEC_LINK_ONCE) == 0) | |
13401 | return FALSE; | |
0c511000 | 13402 | |
c77ec726 AM |
13403 | /* Don't put group member sections on our list of already linked |
13404 | sections. They are handled as a group via their group section. */ | |
13405 | if (elf_sec_group (sec) != NULL) | |
13406 | return FALSE; | |
0c511000 | 13407 | |
c77ec726 AM |
13408 | /* For a SHT_GROUP section, use the group signature as the key. */ |
13409 | name = sec->name; | |
13410 | if ((flags & SEC_GROUP) != 0 | |
13411 | && elf_next_in_group (sec) != NULL | |
13412 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
13413 | key = elf_group_name (elf_next_in_group (sec)); | |
13414 | else | |
13415 | { | |
13416 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 13417 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
13418 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
13419 | key++; | |
0c511000 | 13420 | else |
c77ec726 AM |
13421 | /* Must be a user linkonce section that doesn't follow gcc's |
13422 | naming convention. In this case we won't be matching | |
13423 | single member groups. */ | |
13424 | key = name; | |
0c511000 | 13425 | } |
6d2cd210 | 13426 | |
c77ec726 | 13427 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
13428 | |
13429 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13430 | { | |
c2370991 | 13431 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
13432 | sections with a signature of <key> (<key> is some string), |
13433 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
13434 | Match like sections. LTO plugin sections are an exception. | |
13435 | They are always named .gnu.linkonce.t.<key> and match either | |
13436 | type of section. */ | |
13437 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
13438 | && ((flags & SEC_GROUP) != 0 | |
13439 | || strcmp (name, l->sec->name) == 0)) | |
13440 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
13441 | { |
13442 | /* The section has already been linked. See if we should | |
6d2cd210 | 13443 | issue a warning. */ |
c77ec726 AM |
13444 | if (!_bfd_handle_already_linked (sec, l, info)) |
13445 | return FALSE; | |
082b7297 | 13446 | |
c77ec726 | 13447 | if (flags & SEC_GROUP) |
3d7f7666 | 13448 | { |
c77ec726 AM |
13449 | asection *first = elf_next_in_group (sec); |
13450 | asection *s = first; | |
3d7f7666 | 13451 | |
c77ec726 | 13452 | while (s != NULL) |
3d7f7666 | 13453 | { |
c77ec726 AM |
13454 | s->output_section = bfd_abs_section_ptr; |
13455 | /* Record which group discards it. */ | |
13456 | s->kept_section = l->sec; | |
13457 | s = elf_next_in_group (s); | |
13458 | /* These lists are circular. */ | |
13459 | if (s == first) | |
13460 | break; | |
3d7f7666 L |
13461 | } |
13462 | } | |
082b7297 | 13463 | |
43e1669b | 13464 | return TRUE; |
082b7297 L |
13465 | } |
13466 | } | |
13467 | ||
c77ec726 AM |
13468 | /* A single member comdat group section may be discarded by a |
13469 | linkonce section and vice versa. */ | |
13470 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 13471 | { |
c77ec726 | 13472 | asection *first = elf_next_in_group (sec); |
c2370991 | 13473 | |
c77ec726 AM |
13474 | if (first != NULL && elf_next_in_group (first) == first) |
13475 | /* Check this single member group against linkonce sections. */ | |
13476 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13477 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13478 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
13479 | { | |
13480 | first->output_section = bfd_abs_section_ptr; | |
13481 | first->kept_section = l->sec; | |
13482 | sec->output_section = bfd_abs_section_ptr; | |
13483 | break; | |
13484 | } | |
13485 | } | |
13486 | else | |
13487 | /* Check this linkonce section against single member groups. */ | |
13488 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13489 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 13490 | { |
c77ec726 | 13491 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 13492 | |
c77ec726 AM |
13493 | if (first != NULL |
13494 | && elf_next_in_group (first) == first | |
13495 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
13496 | { | |
13497 | sec->output_section = bfd_abs_section_ptr; | |
13498 | sec->kept_section = first; | |
13499 | break; | |
13500 | } | |
6d2cd210 | 13501 | } |
0c511000 | 13502 | |
c77ec726 AM |
13503 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
13504 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
13505 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
13506 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
13507 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
13508 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
13509 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
13510 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
13511 | The reverse order cannot happen as there is never a bfd with only the | |
13512 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
13513 | matter as here were are looking only for cross-bfd sections. */ | |
13514 | ||
13515 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
13516 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13517 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13518 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
13519 | { | |
13520 | if (abfd != l->sec->owner) | |
13521 | sec->output_section = bfd_abs_section_ptr; | |
13522 | break; | |
13523 | } | |
80c29487 | 13524 | |
082b7297 | 13525 | /* This is the first section with this name. Record it. */ |
c77ec726 | 13526 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 13527 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 13528 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 13529 | } |
81e1b023 | 13530 | |
a4d8e49b L |
13531 | bfd_boolean |
13532 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
13533 | { | |
13534 | return sym->st_shndx == SHN_COMMON; | |
13535 | } | |
13536 | ||
13537 | unsigned int | |
13538 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
13539 | { | |
13540 | return SHN_COMMON; | |
13541 | } | |
13542 | ||
13543 | asection * | |
13544 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
13545 | { | |
13546 | return bfd_com_section_ptr; | |
13547 | } | |
10455f89 HPN |
13548 | |
13549 | bfd_vma | |
13550 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
13551 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13552 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
13553 | bfd *ibfd ATTRIBUTE_UNUSED, | |
13554 | unsigned long symndx ATTRIBUTE_UNUSED) | |
13555 | { | |
13556 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13557 | return bed->s->arch_size / 8; | |
13558 | } | |
83bac4b0 NC |
13559 | |
13560 | /* Routines to support the creation of dynamic relocs. */ | |
13561 | ||
83bac4b0 NC |
13562 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
13563 | ||
13564 | static const char * | |
13565 | get_dynamic_reloc_section_name (bfd * abfd, | |
13566 | asection * sec, | |
13567 | bfd_boolean is_rela) | |
13568 | { | |
ddcf1fcf BS |
13569 | char *name; |
13570 | const char *old_name = bfd_get_section_name (NULL, sec); | |
13571 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 13572 | |
ddcf1fcf | 13573 | if (old_name == NULL) |
83bac4b0 NC |
13574 | return NULL; |
13575 | ||
ddcf1fcf | 13576 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 13577 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
13578 | |
13579 | return name; | |
13580 | } | |
13581 | ||
13582 | /* Returns the dynamic reloc section associated with SEC. | |
13583 | If necessary compute the name of the dynamic reloc section based | |
13584 | on SEC's name (looked up in ABFD's string table) and the setting | |
13585 | of IS_RELA. */ | |
13586 | ||
13587 | asection * | |
13588 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
13589 | asection * sec, | |
13590 | bfd_boolean is_rela) | |
13591 | { | |
13592 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13593 | ||
13594 | if (reloc_sec == NULL) | |
13595 | { | |
13596 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13597 | ||
13598 | if (name != NULL) | |
13599 | { | |
3d4d4302 | 13600 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
13601 | |
13602 | if (reloc_sec != NULL) | |
13603 | elf_section_data (sec)->sreloc = reloc_sec; | |
13604 | } | |
13605 | } | |
13606 | ||
13607 | return reloc_sec; | |
13608 | } | |
13609 | ||
13610 | /* Returns the dynamic reloc section associated with SEC. If the | |
13611 | section does not exist it is created and attached to the DYNOBJ | |
13612 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
13613 | structure. | |
f8076f98 | 13614 | |
83bac4b0 NC |
13615 | ALIGNMENT is the alignment for the newly created section and |
13616 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
13617 | or .rel.<SEC's name>. The section name is looked up in the | |
13618 | string table associated with ABFD. */ | |
13619 | ||
13620 | asection * | |
ca4be51c AM |
13621 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
13622 | bfd *dynobj, | |
13623 | unsigned int alignment, | |
13624 | bfd *abfd, | |
13625 | bfd_boolean is_rela) | |
83bac4b0 NC |
13626 | { |
13627 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13628 | ||
13629 | if (reloc_sec == NULL) | |
13630 | { | |
13631 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13632 | ||
13633 | if (name == NULL) | |
13634 | return NULL; | |
13635 | ||
3d4d4302 | 13636 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
13637 | |
13638 | if (reloc_sec == NULL) | |
13639 | { | |
3d4d4302 AM |
13640 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
13641 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
13642 | if ((sec->flags & SEC_ALLOC) != 0) |
13643 | flags |= SEC_ALLOC | SEC_LOAD; | |
13644 | ||
3d4d4302 | 13645 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
13646 | if (reloc_sec != NULL) |
13647 | { | |
8877b5e5 AM |
13648 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
13649 | name. Override as it may be wrong, eg. for a user | |
13650 | section named "auto" we'll get ".relauto" which is | |
13651 | seen to be a .rela section. */ | |
13652 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
83bac4b0 NC |
13653 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) |
13654 | reloc_sec = NULL; | |
13655 | } | |
13656 | } | |
13657 | ||
13658 | elf_section_data (sec)->sreloc = reloc_sec; | |
13659 | } | |
13660 | ||
13661 | return reloc_sec; | |
13662 | } | |
1338dd10 | 13663 | |
bffebb6b AM |
13664 | /* Copy the ELF symbol type and other attributes for a linker script |
13665 | assignment from HSRC to HDEST. Generally this should be treated as | |
13666 | if we found a strong non-dynamic definition for HDEST (except that | |
13667 | ld ignores multiple definition errors). */ | |
1338dd10 | 13668 | void |
bffebb6b AM |
13669 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
13670 | struct bfd_link_hash_entry *hdest, | |
13671 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 13672 | { |
bffebb6b AM |
13673 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
13674 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
13675 | Elf_Internal_Sym isym; | |
1338dd10 PB |
13676 | |
13677 | ehdest->type = ehsrc->type; | |
35fc36a8 | 13678 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
13679 | |
13680 | isym.st_other = ehsrc->other; | |
b8417128 | 13681 | elf_merge_st_other (abfd, ehdest, &isym, NULL, TRUE, FALSE); |
1338dd10 | 13682 | } |
351f65ca L |
13683 | |
13684 | /* Append a RELA relocation REL to section S in BFD. */ | |
13685 | ||
13686 | void | |
13687 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13688 | { | |
13689 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13690 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
13691 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
13692 | bed->s->swap_reloca_out (abfd, rel, loc); | |
13693 | } | |
13694 | ||
13695 | /* Append a REL relocation REL to section S in BFD. */ | |
13696 | ||
13697 | void | |
13698 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13699 | { | |
13700 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13701 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
13702 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 13703 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 13704 | } |