Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
64d03ab5 | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
24f58f47 | 3 | 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
9dbe8890 | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
8fdd7217 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
8fdd7217 NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
8fdd7217 | 11 | (at your option) any later version. |
252b5132 | 12 | |
8fdd7217 NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
8fdd7217 NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 RH |
25 | #include "bfdlink.h" |
26 | #include "libbfd.h" | |
27 | #define ARCH_SIZE 0 | |
28 | #include "elf-bfd.h" | |
4ad4eba5 | 29 | #include "safe-ctype.h" |
ccf2f652 | 30 | #include "libiberty.h" |
66eb6687 | 31 | #include "objalloc.h" |
252b5132 | 32 | |
28caa186 AM |
33 | /* This struct is used to pass information to routines called via |
34 | elf_link_hash_traverse which must return failure. */ | |
35 | ||
36 | struct elf_info_failed | |
37 | { | |
38 | struct bfd_link_info *info; | |
39 | struct bfd_elf_version_tree *verdefs; | |
40 | bfd_boolean failed; | |
41 | }; | |
42 | ||
43 | /* This structure is used to pass information to | |
44 | _bfd_elf_link_find_version_dependencies. */ | |
45 | ||
46 | struct elf_find_verdep_info | |
47 | { | |
48 | /* General link information. */ | |
49 | struct bfd_link_info *info; | |
50 | /* The number of dependencies. */ | |
51 | unsigned int vers; | |
52 | /* Whether we had a failure. */ | |
53 | bfd_boolean failed; | |
54 | }; | |
55 | ||
56 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
57 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
58 | ||
d98685ac AM |
59 | /* Define a symbol in a dynamic linkage section. */ |
60 | ||
61 | struct elf_link_hash_entry * | |
62 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
63 | struct bfd_link_info *info, | |
64 | asection *sec, | |
65 | const char *name) | |
66 | { | |
67 | struct elf_link_hash_entry *h; | |
68 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 69 | const struct elf_backend_data *bed; |
d98685ac AM |
70 | |
71 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
72 | if (h != NULL) | |
73 | { | |
74 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
75 | This is a symptom of a larger problem: Absolute symbols | |
76 | defined in shared libraries can't be overridden, because we | |
77 | lose the link to the bfd which is via the symbol section. */ | |
78 | h->root.type = bfd_link_hash_new; | |
79 | } | |
80 | ||
81 | bh = &h->root; | |
82 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, | |
83 | sec, 0, NULL, FALSE, | |
84 | get_elf_backend_data (abfd)->collect, | |
85 | &bh)) | |
86 | return NULL; | |
87 | h = (struct elf_link_hash_entry *) bh; | |
88 | h->def_regular = 1; | |
e28df02b | 89 | h->non_elf = 0; |
d98685ac AM |
90 | h->type = STT_OBJECT; |
91 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
92 | ||
ccabcbe5 AM |
93 | bed = get_elf_backend_data (abfd); |
94 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
d98685ac AM |
95 | return h; |
96 | } | |
97 | ||
b34976b6 | 98 | bfd_boolean |
268b6b39 | 99 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
100 | { |
101 | flagword flags; | |
aad5d350 | 102 | asection *s; |
252b5132 | 103 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 104 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 105 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
106 | |
107 | /* This function may be called more than once. */ | |
aad5d350 AM |
108 | s = bfd_get_section_by_name (abfd, ".got"); |
109 | if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) | |
b34976b6 | 110 | return TRUE; |
252b5132 | 111 | |
e5a52504 | 112 | flags = bed->dynamic_sec_flags; |
252b5132 | 113 | |
6de2ae4a L |
114 | s = bfd_make_section_with_flags (abfd, |
115 | (bed->rela_plts_and_copies_p | |
116 | ? ".rela.got" : ".rel.got"), | |
117 | (bed->dynamic_sec_flags | |
118 | | SEC_READONLY)); | |
119 | if (s == NULL | |
120 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
121 | return FALSE; | |
122 | htab->srelgot = s; | |
252b5132 | 123 | |
64e77c6d L |
124 | s = bfd_make_section_with_flags (abfd, ".got", flags); |
125 | if (s == NULL | |
126 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
127 | return FALSE; | |
128 | htab->sgot = s; | |
129 | ||
252b5132 RH |
130 | if (bed->want_got_plt) |
131 | { | |
3496cb2a | 132 | s = bfd_make_section_with_flags (abfd, ".got.plt", flags); |
252b5132 | 133 | if (s == NULL |
6de2ae4a L |
134 | || !bfd_set_section_alignment (abfd, s, |
135 | bed->s->log_file_align)) | |
b34976b6 | 136 | return FALSE; |
6de2ae4a | 137 | htab->sgotplt = s; |
252b5132 RH |
138 | } |
139 | ||
64e77c6d L |
140 | /* The first bit of the global offset table is the header. */ |
141 | s->size += bed->got_header_size; | |
142 | ||
2517a57f AM |
143 | if (bed->want_got_sym) |
144 | { | |
145 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
146 | (or .got.plt) section. We don't do this in the linker script | |
147 | because we don't want to define the symbol if we are not creating | |
148 | a global offset table. */ | |
6de2ae4a L |
149 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
150 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 151 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
152 | if (h == NULL) |
153 | return FALSE; | |
2517a57f | 154 | } |
252b5132 | 155 | |
b34976b6 | 156 | return TRUE; |
252b5132 RH |
157 | } |
158 | \f | |
7e9f0867 AM |
159 | /* Create a strtab to hold the dynamic symbol names. */ |
160 | static bfd_boolean | |
161 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
162 | { | |
163 | struct elf_link_hash_table *hash_table; | |
164 | ||
165 | hash_table = elf_hash_table (info); | |
166 | if (hash_table->dynobj == NULL) | |
167 | hash_table->dynobj = abfd; | |
168 | ||
169 | if (hash_table->dynstr == NULL) | |
170 | { | |
171 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
172 | if (hash_table->dynstr == NULL) | |
173 | return FALSE; | |
174 | } | |
175 | return TRUE; | |
176 | } | |
177 | ||
45d6a902 AM |
178 | /* Create some sections which will be filled in with dynamic linking |
179 | information. ABFD is an input file which requires dynamic sections | |
180 | to be created. The dynamic sections take up virtual memory space | |
181 | when the final executable is run, so we need to create them before | |
182 | addresses are assigned to the output sections. We work out the | |
183 | actual contents and size of these sections later. */ | |
252b5132 | 184 | |
b34976b6 | 185 | bfd_boolean |
268b6b39 | 186 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 187 | { |
45d6a902 | 188 | flagword flags; |
91d6fa6a | 189 | asection *s; |
9c5bfbb7 | 190 | const struct elf_backend_data *bed; |
252b5132 | 191 | |
0eddce27 | 192 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
193 | return FALSE; |
194 | ||
195 | if (elf_hash_table (info)->dynamic_sections_created) | |
196 | return TRUE; | |
197 | ||
7e9f0867 AM |
198 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
199 | return FALSE; | |
45d6a902 | 200 | |
7e9f0867 | 201 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
202 | bed = get_elf_backend_data (abfd); |
203 | ||
204 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
205 | |
206 | /* A dynamically linked executable has a .interp section, but a | |
207 | shared library does not. */ | |
36af4a4e | 208 | if (info->executable) |
252b5132 | 209 | { |
3496cb2a L |
210 | s = bfd_make_section_with_flags (abfd, ".interp", |
211 | flags | SEC_READONLY); | |
212 | if (s == NULL) | |
45d6a902 AM |
213 | return FALSE; |
214 | } | |
bb0deeff | 215 | |
45d6a902 AM |
216 | /* Create sections to hold version informations. These are removed |
217 | if they are not needed. */ | |
3496cb2a L |
218 | s = bfd_make_section_with_flags (abfd, ".gnu.version_d", |
219 | flags | SEC_READONLY); | |
45d6a902 | 220 | if (s == NULL |
45d6a902 AM |
221 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
222 | return FALSE; | |
223 | ||
3496cb2a L |
224 | s = bfd_make_section_with_flags (abfd, ".gnu.version", |
225 | flags | SEC_READONLY); | |
45d6a902 | 226 | if (s == NULL |
45d6a902 AM |
227 | || ! bfd_set_section_alignment (abfd, s, 1)) |
228 | return FALSE; | |
229 | ||
3496cb2a L |
230 | s = bfd_make_section_with_flags (abfd, ".gnu.version_r", |
231 | flags | SEC_READONLY); | |
45d6a902 | 232 | if (s == NULL |
45d6a902 AM |
233 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
234 | return FALSE; | |
235 | ||
3496cb2a L |
236 | s = bfd_make_section_with_flags (abfd, ".dynsym", |
237 | flags | SEC_READONLY); | |
45d6a902 | 238 | if (s == NULL |
45d6a902 AM |
239 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
240 | return FALSE; | |
241 | ||
3496cb2a L |
242 | s = bfd_make_section_with_flags (abfd, ".dynstr", |
243 | flags | SEC_READONLY); | |
244 | if (s == NULL) | |
45d6a902 AM |
245 | return FALSE; |
246 | ||
3496cb2a | 247 | s = bfd_make_section_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 248 | if (s == NULL |
45d6a902 AM |
249 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
250 | return FALSE; | |
251 | ||
252 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
253 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
254 | only want to define it if we are, in fact, creating a .dynamic | |
255 | section. We don't want to define it if there is no .dynamic | |
256 | section, since on some ELF platforms the start up code examines it | |
257 | to decide how to initialize the process. */ | |
d98685ac | 258 | if (!_bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC")) |
45d6a902 AM |
259 | return FALSE; |
260 | ||
fdc90cb4 JJ |
261 | if (info->emit_hash) |
262 | { | |
263 | s = bfd_make_section_with_flags (abfd, ".hash", flags | SEC_READONLY); | |
264 | if (s == NULL | |
265 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
266 | return FALSE; | |
267 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
268 | } | |
269 | ||
270 | if (info->emit_gnu_hash) | |
271 | { | |
272 | s = bfd_make_section_with_flags (abfd, ".gnu.hash", | |
273 | flags | SEC_READONLY); | |
274 | if (s == NULL | |
275 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
276 | return FALSE; | |
277 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
278 | 4 32-bit words followed by variable count of 64-bit words, then | |
279 | variable count of 32-bit words. */ | |
280 | if (bed->s->arch_size == 64) | |
281 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
282 | else | |
283 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
284 | } | |
45d6a902 AM |
285 | |
286 | /* Let the backend create the rest of the sections. This lets the | |
287 | backend set the right flags. The backend will normally create | |
288 | the .got and .plt sections. */ | |
894891db NC |
289 | if (bed->elf_backend_create_dynamic_sections == NULL |
290 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
291 | return FALSE; |
292 | ||
293 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
294 | ||
295 | return TRUE; | |
296 | } | |
297 | ||
298 | /* Create dynamic sections when linking against a dynamic object. */ | |
299 | ||
300 | bfd_boolean | |
268b6b39 | 301 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
302 | { |
303 | flagword flags, pltflags; | |
7325306f | 304 | struct elf_link_hash_entry *h; |
45d6a902 | 305 | asection *s; |
9c5bfbb7 | 306 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 307 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 308 | |
252b5132 RH |
309 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
310 | .rel[a].bss sections. */ | |
e5a52504 | 311 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
312 | |
313 | pltflags = flags; | |
252b5132 | 314 | if (bed->plt_not_loaded) |
6df4d94c MM |
315 | /* We do not clear SEC_ALLOC here because we still want the OS to |
316 | allocate space for the section; it's just that there's nothing | |
317 | to read in from the object file. */ | |
5d1634d7 | 318 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
319 | else |
320 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
321 | if (bed->plt_readonly) |
322 | pltflags |= SEC_READONLY; | |
323 | ||
3496cb2a | 324 | s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
252b5132 | 325 | if (s == NULL |
252b5132 | 326 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 327 | return FALSE; |
6de2ae4a | 328 | htab->splt = s; |
252b5132 | 329 | |
d98685ac AM |
330 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
331 | .plt section. */ | |
7325306f RS |
332 | if (bed->want_plt_sym) |
333 | { | |
334 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
335 | "_PROCEDURE_LINKAGE_TABLE_"); | |
336 | elf_hash_table (info)->hplt = h; | |
337 | if (h == NULL) | |
338 | return FALSE; | |
339 | } | |
252b5132 | 340 | |
3496cb2a | 341 | s = bfd_make_section_with_flags (abfd, |
d35fd659 | 342 | (bed->rela_plts_and_copies_p |
3496cb2a L |
343 | ? ".rela.plt" : ".rel.plt"), |
344 | flags | SEC_READONLY); | |
252b5132 | 345 | if (s == NULL |
45d6a902 | 346 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 347 | return FALSE; |
6de2ae4a | 348 | htab->srelplt = s; |
252b5132 RH |
349 | |
350 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 351 | return FALSE; |
252b5132 | 352 | |
3018b441 RH |
353 | if (bed->want_dynbss) |
354 | { | |
355 | /* The .dynbss section is a place to put symbols which are defined | |
356 | by dynamic objects, are referenced by regular objects, and are | |
357 | not functions. We must allocate space for them in the process | |
358 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
359 | initialize them at run time. The linker script puts the .dynbss | |
360 | section into the .bss section of the final image. */ | |
3496cb2a L |
361 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
362 | (SEC_ALLOC | |
363 | | SEC_LINKER_CREATED)); | |
364 | if (s == NULL) | |
b34976b6 | 365 | return FALSE; |
252b5132 | 366 | |
3018b441 | 367 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
368 | normally needed. We need to create it here, though, so that the |
369 | linker will map it to an output section. We can't just create it | |
370 | only if we need it, because we will not know whether we need it | |
371 | until we have seen all the input files, and the first time the | |
372 | main linker code calls BFD after examining all the input files | |
373 | (size_dynamic_sections) the input sections have already been | |
374 | mapped to the output sections. If the section turns out not to | |
375 | be needed, we can discard it later. We will never need this | |
376 | section when generating a shared object, since they do not use | |
377 | copy relocs. */ | |
3018b441 RH |
378 | if (! info->shared) |
379 | { | |
3496cb2a | 380 | s = bfd_make_section_with_flags (abfd, |
d35fd659 | 381 | (bed->rela_plts_and_copies_p |
3496cb2a L |
382 | ? ".rela.bss" : ".rel.bss"), |
383 | flags | SEC_READONLY); | |
3018b441 | 384 | if (s == NULL |
45d6a902 | 385 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 386 | return FALSE; |
3018b441 | 387 | } |
252b5132 RH |
388 | } |
389 | ||
b34976b6 | 390 | return TRUE; |
252b5132 RH |
391 | } |
392 | \f | |
252b5132 RH |
393 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
394 | read the input files, since we need to have a list of all of them | |
395 | before we can determine the final sizes of the output sections. | |
396 | Note that we may actually call this function even though we are not | |
397 | going to output any dynamic symbols; in some cases we know that a | |
398 | symbol should be in the dynamic symbol table, but only if there is | |
399 | one. */ | |
400 | ||
b34976b6 | 401 | bfd_boolean |
c152c796 AM |
402 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
403 | struct elf_link_hash_entry *h) | |
252b5132 RH |
404 | { |
405 | if (h->dynindx == -1) | |
406 | { | |
2b0f7ef9 | 407 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 408 | char *p; |
252b5132 | 409 | const char *name; |
252b5132 RH |
410 | bfd_size_type indx; |
411 | ||
7a13edea NC |
412 | /* XXX: The ABI draft says the linker must turn hidden and |
413 | internal symbols into STB_LOCAL symbols when producing the | |
414 | DSO. However, if ld.so honors st_other in the dynamic table, | |
415 | this would not be necessary. */ | |
416 | switch (ELF_ST_VISIBILITY (h->other)) | |
417 | { | |
418 | case STV_INTERNAL: | |
419 | case STV_HIDDEN: | |
9d6eee78 L |
420 | if (h->root.type != bfd_link_hash_undefined |
421 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 422 | { |
f5385ebf | 423 | h->forced_local = 1; |
67687978 PB |
424 | if (!elf_hash_table (info)->is_relocatable_executable) |
425 | return TRUE; | |
7a13edea | 426 | } |
0444bdd4 | 427 | |
7a13edea NC |
428 | default: |
429 | break; | |
430 | } | |
431 | ||
252b5132 RH |
432 | h->dynindx = elf_hash_table (info)->dynsymcount; |
433 | ++elf_hash_table (info)->dynsymcount; | |
434 | ||
435 | dynstr = elf_hash_table (info)->dynstr; | |
436 | if (dynstr == NULL) | |
437 | { | |
438 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 439 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 440 | if (dynstr == NULL) |
b34976b6 | 441 | return FALSE; |
252b5132 RH |
442 | } |
443 | ||
444 | /* We don't put any version information in the dynamic string | |
aad5d350 | 445 | table. */ |
252b5132 RH |
446 | name = h->root.root.string; |
447 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
448 | if (p != NULL) |
449 | /* We know that the p points into writable memory. In fact, | |
450 | there are only a few symbols that have read-only names, being | |
451 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
452 | by the backends. Most symbols will have names pointing into | |
453 | an ELF string table read from a file, or to objalloc memory. */ | |
454 | *p = 0; | |
455 | ||
456 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
457 | ||
458 | if (p != NULL) | |
459 | *p = ELF_VER_CHR; | |
252b5132 RH |
460 | |
461 | if (indx == (bfd_size_type) -1) | |
b34976b6 | 462 | return FALSE; |
252b5132 RH |
463 | h->dynstr_index = indx; |
464 | } | |
465 | ||
b34976b6 | 466 | return TRUE; |
252b5132 | 467 | } |
45d6a902 | 468 | \f |
55255dae L |
469 | /* Mark a symbol dynamic. */ |
470 | ||
28caa186 | 471 | static void |
55255dae | 472 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
473 | struct elf_link_hash_entry *h, |
474 | Elf_Internal_Sym *sym) | |
55255dae | 475 | { |
40b36307 | 476 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 477 | |
40b36307 L |
478 | /* It may be called more than once on the same H. */ |
479 | if(h->dynamic || info->relocatable) | |
55255dae L |
480 | return; |
481 | ||
40b36307 L |
482 | if ((info->dynamic_data |
483 | && (h->type == STT_OBJECT | |
484 | || (sym != NULL | |
485 | && ELF_ST_TYPE (sym->st_info) == STT_OBJECT))) | |
a0c8462f | 486 | || (d != NULL |
40b36307 L |
487 | && h->root.type == bfd_link_hash_new |
488 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
489 | h->dynamic = 1; |
490 | } | |
491 | ||
45d6a902 AM |
492 | /* Record an assignment to a symbol made by a linker script. We need |
493 | this in case some dynamic object refers to this symbol. */ | |
494 | ||
495 | bfd_boolean | |
fe21a8fc L |
496 | bfd_elf_record_link_assignment (bfd *output_bfd, |
497 | struct bfd_link_info *info, | |
268b6b39 | 498 | const char *name, |
fe21a8fc L |
499 | bfd_boolean provide, |
500 | bfd_boolean hidden) | |
45d6a902 | 501 | { |
00cbee0a | 502 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 503 | struct elf_link_hash_table *htab; |
00cbee0a | 504 | const struct elf_backend_data *bed; |
45d6a902 | 505 | |
0eddce27 | 506 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
507 | return TRUE; |
508 | ||
4ea42fb7 AM |
509 | htab = elf_hash_table (info); |
510 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 511 | if (h == NULL) |
4ea42fb7 | 512 | return provide; |
45d6a902 | 513 | |
00cbee0a | 514 | switch (h->root.type) |
77cfaee6 | 515 | { |
00cbee0a L |
516 | case bfd_link_hash_defined: |
517 | case bfd_link_hash_defweak: | |
518 | case bfd_link_hash_common: | |
519 | break; | |
520 | case bfd_link_hash_undefweak: | |
521 | case bfd_link_hash_undefined: | |
522 | /* Since we're defining the symbol, don't let it seem to have not | |
523 | been defined. record_dynamic_symbol and size_dynamic_sections | |
524 | may depend on this. */ | |
4ea42fb7 | 525 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
526 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
527 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
528 | break; |
529 | case bfd_link_hash_new: | |
40b36307 | 530 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 531 | h->non_elf = 0; |
00cbee0a L |
532 | break; |
533 | case bfd_link_hash_indirect: | |
534 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 535 | the versioned symbol point to this one. */ |
00cbee0a L |
536 | bed = get_elf_backend_data (output_bfd); |
537 | hv = h; | |
538 | while (hv->root.type == bfd_link_hash_indirect | |
539 | || hv->root.type == bfd_link_hash_warning) | |
540 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
541 | /* We don't need to update h->root.u since linker will set them | |
542 | later. */ | |
543 | h->root.type = bfd_link_hash_undefined; | |
544 | hv->root.type = bfd_link_hash_indirect; | |
545 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
546 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
547 | break; | |
548 | case bfd_link_hash_warning: | |
549 | abort (); | |
550 | break; | |
55255dae | 551 | } |
45d6a902 AM |
552 | |
553 | /* If this symbol is being provided by the linker script, and it is | |
554 | currently defined by a dynamic object, but not by a regular | |
555 | object, then mark it as undefined so that the generic linker will | |
556 | force the correct value. */ | |
557 | if (provide | |
f5385ebf AM |
558 | && h->def_dynamic |
559 | && !h->def_regular) | |
45d6a902 AM |
560 | h->root.type = bfd_link_hash_undefined; |
561 | ||
562 | /* If this symbol is not being provided by the linker script, and it is | |
563 | currently defined by a dynamic object, but not by a regular object, | |
564 | then clear out any version information because the symbol will not be | |
565 | associated with the dynamic object any more. */ | |
566 | if (!provide | |
f5385ebf AM |
567 | && h->def_dynamic |
568 | && !h->def_regular) | |
45d6a902 AM |
569 | h->verinfo.verdef = NULL; |
570 | ||
f5385ebf | 571 | h->def_regular = 1; |
45d6a902 | 572 | |
fe21a8fc L |
573 | if (provide && hidden) |
574 | { | |
91d6fa6a | 575 | bed = get_elf_backend_data (output_bfd); |
fe21a8fc L |
576 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; |
577 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
578 | } | |
579 | ||
6fa3860b PB |
580 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
581 | and executables. */ | |
582 | if (!info->relocatable | |
583 | && h->dynindx != -1 | |
584 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
585 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
586 | h->forced_local = 1; | |
587 | ||
f5385ebf AM |
588 | if ((h->def_dynamic |
589 | || h->ref_dynamic | |
67687978 PB |
590 | || info->shared |
591 | || (info->executable && elf_hash_table (info)->is_relocatable_executable)) | |
45d6a902 AM |
592 | && h->dynindx == -1) |
593 | { | |
c152c796 | 594 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
595 | return FALSE; |
596 | ||
597 | /* If this is a weak defined symbol, and we know a corresponding | |
598 | real symbol from the same dynamic object, make sure the real | |
599 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
600 | if (h->u.weakdef != NULL |
601 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 602 | { |
f6e332e6 | 603 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
604 | return FALSE; |
605 | } | |
606 | } | |
607 | ||
608 | return TRUE; | |
609 | } | |
42751cf3 | 610 | |
8c58d23b AM |
611 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
612 | success, and 2 on a failure caused by attempting to record a symbol | |
613 | in a discarded section, eg. a discarded link-once section symbol. */ | |
614 | ||
615 | int | |
c152c796 AM |
616 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
617 | bfd *input_bfd, | |
618 | long input_indx) | |
8c58d23b AM |
619 | { |
620 | bfd_size_type amt; | |
621 | struct elf_link_local_dynamic_entry *entry; | |
622 | struct elf_link_hash_table *eht; | |
623 | struct elf_strtab_hash *dynstr; | |
624 | unsigned long dynstr_index; | |
625 | char *name; | |
626 | Elf_External_Sym_Shndx eshndx; | |
627 | char esym[sizeof (Elf64_External_Sym)]; | |
628 | ||
0eddce27 | 629 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
630 | return 0; |
631 | ||
632 | /* See if the entry exists already. */ | |
633 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
634 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
635 | return 1; | |
636 | ||
637 | amt = sizeof (*entry); | |
a50b1753 | 638 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
639 | if (entry == NULL) |
640 | return 0; | |
641 | ||
642 | /* Go find the symbol, so that we can find it's name. */ | |
643 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 644 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
645 | { |
646 | bfd_release (input_bfd, entry); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 651 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
652 | { |
653 | asection *s; | |
654 | ||
655 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
656 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
657 | { | |
658 | /* We can still bfd_release here as nothing has done another | |
659 | bfd_alloc. We can't do this later in this function. */ | |
660 | bfd_release (input_bfd, entry); | |
661 | return 2; | |
662 | } | |
663 | } | |
664 | ||
665 | name = (bfd_elf_string_from_elf_section | |
666 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
667 | entry->isym.st_name)); | |
668 | ||
669 | dynstr = elf_hash_table (info)->dynstr; | |
670 | if (dynstr == NULL) | |
671 | { | |
672 | /* Create a strtab to hold the dynamic symbol names. */ | |
673 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
674 | if (dynstr == NULL) | |
675 | return 0; | |
676 | } | |
677 | ||
b34976b6 | 678 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
8c58d23b AM |
679 | if (dynstr_index == (unsigned long) -1) |
680 | return 0; | |
681 | entry->isym.st_name = dynstr_index; | |
682 | ||
683 | eht = elf_hash_table (info); | |
684 | ||
685 | entry->next = eht->dynlocal; | |
686 | eht->dynlocal = entry; | |
687 | entry->input_bfd = input_bfd; | |
688 | entry->input_indx = input_indx; | |
689 | eht->dynsymcount++; | |
690 | ||
691 | /* Whatever binding the symbol had before, it's now local. */ | |
692 | entry->isym.st_info | |
693 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
694 | ||
695 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
696 | ||
697 | return 1; | |
698 | } | |
699 | ||
30b30c21 | 700 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 701 | |
30b30c21 | 702 | long |
268b6b39 AM |
703 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
704 | bfd *input_bfd, | |
705 | long input_indx) | |
30b30c21 RH |
706 | { |
707 | struct elf_link_local_dynamic_entry *e; | |
708 | ||
709 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
710 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
711 | return e->dynindx; | |
712 | return -1; | |
713 | } | |
714 | ||
715 | /* This function is used to renumber the dynamic symbols, if some of | |
716 | them are removed because they are marked as local. This is called | |
717 | via elf_link_hash_traverse. */ | |
718 | ||
b34976b6 | 719 | static bfd_boolean |
268b6b39 AM |
720 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
721 | void *data) | |
42751cf3 | 722 | { |
a50b1753 | 723 | size_t *count = (size_t *) data; |
30b30c21 | 724 | |
e92d460e AM |
725 | if (h->root.type == bfd_link_hash_warning) |
726 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
727 | ||
6fa3860b PB |
728 | if (h->forced_local) |
729 | return TRUE; | |
730 | ||
731 | if (h->dynindx != -1) | |
732 | h->dynindx = ++(*count); | |
733 | ||
734 | return TRUE; | |
735 | } | |
736 | ||
737 | ||
738 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
739 | STB_LOCAL binding. */ | |
740 | ||
741 | static bfd_boolean | |
742 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
743 | void *data) | |
744 | { | |
a50b1753 | 745 | size_t *count = (size_t *) data; |
6fa3860b PB |
746 | |
747 | if (h->root.type == bfd_link_hash_warning) | |
748 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
749 | ||
750 | if (!h->forced_local) | |
751 | return TRUE; | |
752 | ||
42751cf3 | 753 | if (h->dynindx != -1) |
30b30c21 RH |
754 | h->dynindx = ++(*count); |
755 | ||
b34976b6 | 756 | return TRUE; |
42751cf3 | 757 | } |
30b30c21 | 758 | |
aee6f5b4 AO |
759 | /* Return true if the dynamic symbol for a given section should be |
760 | omitted when creating a shared library. */ | |
761 | bfd_boolean | |
762 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
763 | struct bfd_link_info *info, | |
764 | asection *p) | |
765 | { | |
74541ad4 AM |
766 | struct elf_link_hash_table *htab; |
767 | ||
aee6f5b4 AO |
768 | switch (elf_section_data (p)->this_hdr.sh_type) |
769 | { | |
770 | case SHT_PROGBITS: | |
771 | case SHT_NOBITS: | |
772 | /* If sh_type is yet undecided, assume it could be | |
773 | SHT_PROGBITS/SHT_NOBITS. */ | |
774 | case SHT_NULL: | |
74541ad4 AM |
775 | htab = elf_hash_table (info); |
776 | if (p == htab->tls_sec) | |
777 | return FALSE; | |
778 | ||
779 | if (htab->text_index_section != NULL) | |
780 | return p != htab->text_index_section && p != htab->data_index_section; | |
781 | ||
aee6f5b4 AO |
782 | if (strcmp (p->name, ".got") == 0 |
783 | || strcmp (p->name, ".got.plt") == 0 | |
784 | || strcmp (p->name, ".plt") == 0) | |
785 | { | |
786 | asection *ip; | |
aee6f5b4 | 787 | |
74541ad4 AM |
788 | if (htab->dynobj != NULL |
789 | && (ip = bfd_get_section_by_name (htab->dynobj, p->name)) != NULL | |
aee6f5b4 AO |
790 | && (ip->flags & SEC_LINKER_CREATED) |
791 | && ip->output_section == p) | |
792 | return TRUE; | |
793 | } | |
794 | return FALSE; | |
795 | ||
796 | /* There shouldn't be section relative relocations | |
797 | against any other section. */ | |
798 | default: | |
799 | return TRUE; | |
800 | } | |
801 | } | |
802 | ||
062e2358 | 803 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
804 | symbol for each output section, which come first. Next come symbols |
805 | which have been forced to local binding. Then all of the back-end | |
806 | allocated local dynamic syms, followed by the rest of the global | |
807 | symbols. */ | |
30b30c21 | 808 | |
554220db AM |
809 | static unsigned long |
810 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
811 | struct bfd_link_info *info, | |
812 | unsigned long *section_sym_count) | |
30b30c21 RH |
813 | { |
814 | unsigned long dynsymcount = 0; | |
815 | ||
67687978 | 816 | if (info->shared || elf_hash_table (info)->is_relocatable_executable) |
30b30c21 | 817 | { |
aee6f5b4 | 818 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
819 | asection *p; |
820 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 821 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
822 | && (p->flags & SEC_ALLOC) != 0 |
823 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
824 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
825 | else |
826 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 827 | } |
554220db | 828 | *section_sym_count = dynsymcount; |
30b30c21 | 829 | |
6fa3860b PB |
830 | elf_link_hash_traverse (elf_hash_table (info), |
831 | elf_link_renumber_local_hash_table_dynsyms, | |
832 | &dynsymcount); | |
833 | ||
30b30c21 RH |
834 | if (elf_hash_table (info)->dynlocal) |
835 | { | |
836 | struct elf_link_local_dynamic_entry *p; | |
837 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
838 | p->dynindx = ++dynsymcount; | |
839 | } | |
840 | ||
841 | elf_link_hash_traverse (elf_hash_table (info), | |
842 | elf_link_renumber_hash_table_dynsyms, | |
843 | &dynsymcount); | |
844 | ||
845 | /* There is an unused NULL entry at the head of the table which | |
846 | we must account for in our count. Unless there weren't any | |
847 | symbols, which means we'll have no table at all. */ | |
848 | if (dynsymcount != 0) | |
849 | ++dynsymcount; | |
850 | ||
ccabcbe5 AM |
851 | elf_hash_table (info)->dynsymcount = dynsymcount; |
852 | return dynsymcount; | |
30b30c21 | 853 | } |
252b5132 | 854 | |
54ac0771 L |
855 | /* Merge st_other field. */ |
856 | ||
857 | static void | |
858 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
859 | Elf_Internal_Sym *isym, bfd_boolean definition, | |
860 | bfd_boolean dynamic) | |
861 | { | |
862 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
863 | ||
864 | /* If st_other has a processor-specific meaning, specific | |
865 | code might be needed here. We never merge the visibility | |
866 | attribute with the one from a dynamic object. */ | |
867 | if (bed->elf_backend_merge_symbol_attribute) | |
868 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
869 | dynamic); | |
870 | ||
871 | /* If this symbol has default visibility and the user has requested | |
872 | we not re-export it, then mark it as hidden. */ | |
873 | if (definition | |
874 | && !dynamic | |
875 | && (abfd->no_export | |
876 | || (abfd->my_archive && abfd->my_archive->no_export)) | |
877 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) | |
878 | isym->st_other = (STV_HIDDEN | |
879 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
880 | ||
881 | if (!dynamic && ELF_ST_VISIBILITY (isym->st_other) != 0) | |
882 | { | |
883 | unsigned char hvis, symvis, other, nvis; | |
884 | ||
885 | /* Only merge the visibility. Leave the remainder of the | |
886 | st_other field to elf_backend_merge_symbol_attribute. */ | |
887 | other = h->other & ~ELF_ST_VISIBILITY (-1); | |
888 | ||
889 | /* Combine visibilities, using the most constraining one. */ | |
890 | hvis = ELF_ST_VISIBILITY (h->other); | |
891 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
892 | if (! hvis) | |
893 | nvis = symvis; | |
894 | else if (! symvis) | |
895 | nvis = hvis; | |
896 | else | |
897 | nvis = hvis < symvis ? hvis : symvis; | |
898 | ||
899 | h->other = other | nvis; | |
900 | } | |
901 | } | |
902 | ||
45d6a902 AM |
903 | /* This function is called when we want to define a new symbol. It |
904 | handles the various cases which arise when we find a definition in | |
905 | a dynamic object, or when there is already a definition in a | |
906 | dynamic object. The new symbol is described by NAME, SYM, PSEC, | |
907 | and PVALUE. We set SYM_HASH to the hash table entry. We set | |
908 | OVERRIDE if the old symbol is overriding a new definition. We set | |
909 | TYPE_CHANGE_OK if it is OK for the type to change. We set | |
910 | SIZE_CHANGE_OK if it is OK for the size to change. By OK to | |
911 | change, we mean that we shouldn't warn if the type or size does | |
af44c138 L |
912 | change. We set POLD_ALIGNMENT if an old common symbol in a dynamic |
913 | object is overridden by a regular object. */ | |
45d6a902 AM |
914 | |
915 | bfd_boolean | |
268b6b39 AM |
916 | _bfd_elf_merge_symbol (bfd *abfd, |
917 | struct bfd_link_info *info, | |
918 | const char *name, | |
919 | Elf_Internal_Sym *sym, | |
920 | asection **psec, | |
921 | bfd_vma *pvalue, | |
af44c138 | 922 | unsigned int *pold_alignment, |
268b6b39 AM |
923 | struct elf_link_hash_entry **sym_hash, |
924 | bfd_boolean *skip, | |
925 | bfd_boolean *override, | |
926 | bfd_boolean *type_change_ok, | |
0f8a2703 | 927 | bfd_boolean *size_change_ok) |
252b5132 | 928 | { |
7479dfd4 | 929 | asection *sec, *oldsec; |
45d6a902 AM |
930 | struct elf_link_hash_entry *h; |
931 | struct elf_link_hash_entry *flip; | |
932 | int bind; | |
933 | bfd *oldbfd; | |
934 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 935 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 936 | const struct elf_backend_data *bed; |
45d6a902 AM |
937 | |
938 | *skip = FALSE; | |
939 | *override = FALSE; | |
940 | ||
941 | sec = *psec; | |
942 | bind = ELF_ST_BIND (sym->st_info); | |
943 | ||
cd7be95b KH |
944 | /* Silently discard TLS symbols from --just-syms. There's no way to |
945 | combine a static TLS block with a new TLS block for this executable. */ | |
946 | if (ELF_ST_TYPE (sym->st_info) == STT_TLS | |
947 | && sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) | |
948 | { | |
949 | *skip = TRUE; | |
950 | return TRUE; | |
951 | } | |
952 | ||
45d6a902 AM |
953 | if (! bfd_is_und_section (sec)) |
954 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
955 | else | |
956 | h = ((struct elf_link_hash_entry *) | |
957 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
958 | if (h == NULL) | |
959 | return FALSE; | |
960 | *sym_hash = h; | |
252b5132 | 961 | |
88ba32a0 L |
962 | bed = get_elf_backend_data (abfd); |
963 | ||
45d6a902 AM |
964 | /* This code is for coping with dynamic objects, and is only useful |
965 | if we are doing an ELF link. */ | |
88ba32a0 | 966 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) |
45d6a902 | 967 | return TRUE; |
252b5132 | 968 | |
45d6a902 AM |
969 | /* For merging, we only care about real symbols. */ |
970 | ||
971 | while (h->root.type == bfd_link_hash_indirect | |
972 | || h->root.type == bfd_link_hash_warning) | |
973 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
974 | ||
40b36307 L |
975 | /* We have to check it for every instance since the first few may be |
976 | refereences and not all compilers emit symbol type for undefined | |
977 | symbols. */ | |
978 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
979 | ||
45d6a902 AM |
980 | /* If we just created the symbol, mark it as being an ELF symbol. |
981 | Other than that, there is nothing to do--there is no merge issue | |
982 | with a newly defined symbol--so we just return. */ | |
983 | ||
984 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 985 | { |
f5385ebf | 986 | h->non_elf = 0; |
45d6a902 AM |
987 | return TRUE; |
988 | } | |
252b5132 | 989 | |
7479dfd4 L |
990 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
991 | existing symbol. */ | |
252b5132 | 992 | |
45d6a902 AM |
993 | switch (h->root.type) |
994 | { | |
995 | default: | |
996 | oldbfd = NULL; | |
7479dfd4 | 997 | oldsec = NULL; |
45d6a902 | 998 | break; |
252b5132 | 999 | |
45d6a902 AM |
1000 | case bfd_link_hash_undefined: |
1001 | case bfd_link_hash_undefweak: | |
1002 | oldbfd = h->root.u.undef.abfd; | |
7479dfd4 | 1003 | oldsec = NULL; |
45d6a902 AM |
1004 | break; |
1005 | ||
1006 | case bfd_link_hash_defined: | |
1007 | case bfd_link_hash_defweak: | |
1008 | oldbfd = h->root.u.def.section->owner; | |
7479dfd4 | 1009 | oldsec = h->root.u.def.section; |
45d6a902 AM |
1010 | break; |
1011 | ||
1012 | case bfd_link_hash_common: | |
1013 | oldbfd = h->root.u.c.p->section->owner; | |
7479dfd4 | 1014 | oldsec = h->root.u.c.p->section; |
45d6a902 AM |
1015 | break; |
1016 | } | |
1017 | ||
895fa45f MGD |
1018 | /* Differentiate strong and weak symbols. */ |
1019 | newweak = bind == STB_WEAK; | |
1020 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1021 | || h->root.type == bfd_link_hash_undefweak); | |
1022 | ||
45d6a902 AM |
1023 | /* In cases involving weak versioned symbols, we may wind up trying |
1024 | to merge a symbol with itself. Catch that here, to avoid the | |
1025 | confusion that results if we try to override a symbol with | |
1026 | itself. The additional tests catch cases like | |
1027 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1028 | dynamic object, which we do want to handle here. */ | |
1029 | if (abfd == oldbfd | |
895fa45f | 1030 | && (newweak || oldweak) |
45d6a902 | 1031 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1032 | || !h->def_regular)) |
45d6a902 AM |
1033 | return TRUE; |
1034 | ||
1035 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, | |
1036 | respectively, is from a dynamic object. */ | |
1037 | ||
707bba77 | 1038 | newdyn = (abfd->flags & DYNAMIC) != 0; |
45d6a902 | 1039 | |
707bba77 | 1040 | olddyn = FALSE; |
45d6a902 AM |
1041 | if (oldbfd != NULL) |
1042 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1043 | else if (oldsec != NULL) |
45d6a902 | 1044 | { |
707bba77 | 1045 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1046 | indices used by MIPS ELF. */ |
707bba77 | 1047 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1048 | } |
252b5132 | 1049 | |
45d6a902 AM |
1050 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1051 | respectively, appear to be a definition rather than reference. */ | |
1052 | ||
707bba77 | 1053 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1054 | |
707bba77 AM |
1055 | olddef = (h->root.type != bfd_link_hash_undefined |
1056 | && h->root.type != bfd_link_hash_undefweak | |
1057 | && h->root.type != bfd_link_hash_common); | |
45d6a902 | 1058 | |
0a36a439 L |
1059 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1060 | respectively, appear to be a function. */ | |
1061 | ||
1062 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1063 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1064 | ||
1065 | oldfunc = (h->type != STT_NOTYPE | |
1066 | && bed->is_function_type (h->type)); | |
1067 | ||
580a2b6e L |
1068 | /* When we try to create a default indirect symbol from the dynamic |
1069 | definition with the default version, we skip it if its type and | |
1070 | the type of existing regular definition mismatch. We only do it | |
1071 | if the existing regular definition won't be dynamic. */ | |
1072 | if (pold_alignment == NULL | |
1073 | && !info->shared | |
1074 | && !info->export_dynamic | |
1075 | && !h->ref_dynamic | |
1076 | && newdyn | |
1077 | && newdef | |
1078 | && !olddyn | |
1079 | && (olddef || h->root.type == bfd_link_hash_common) | |
1080 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1081 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
fcb93ecf | 1082 | && h->type != STT_NOTYPE |
0a36a439 | 1083 | && !(newfunc && oldfunc)) |
580a2b6e L |
1084 | { |
1085 | *skip = TRUE; | |
1086 | return TRUE; | |
1087 | } | |
1088 | ||
68f49ba3 L |
1089 | /* Check TLS symbol. We don't check undefined symbol introduced by |
1090 | "ld -u". */ | |
7479dfd4 | 1091 | if ((ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS) |
68f49ba3 L |
1092 | && ELF_ST_TYPE (sym->st_info) != h->type |
1093 | && oldbfd != NULL) | |
7479dfd4 L |
1094 | { |
1095 | bfd *ntbfd, *tbfd; | |
1096 | bfd_boolean ntdef, tdef; | |
1097 | asection *ntsec, *tsec; | |
1098 | ||
1099 | if (h->type == STT_TLS) | |
1100 | { | |
3b36f7e6 | 1101 | ntbfd = abfd; |
7479dfd4 L |
1102 | ntsec = sec; |
1103 | ntdef = newdef; | |
1104 | tbfd = oldbfd; | |
1105 | tsec = oldsec; | |
1106 | tdef = olddef; | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | ntbfd = oldbfd; | |
1111 | ntsec = oldsec; | |
1112 | ntdef = olddef; | |
1113 | tbfd = abfd; | |
1114 | tsec = sec; | |
1115 | tdef = newdef; | |
1116 | } | |
1117 | ||
1118 | if (tdef && ntdef) | |
1119 | (*_bfd_error_handler) | |
fc3e1e3c | 1120 | (_("%s: TLS definition in %B section %A mismatches non-TLS definition in %B section %A"), |
7479dfd4 L |
1121 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1122 | else if (!tdef && !ntdef) | |
1123 | (*_bfd_error_handler) | |
fc3e1e3c | 1124 | (_("%s: TLS reference in %B mismatches non-TLS reference in %B"), |
7479dfd4 L |
1125 | tbfd, ntbfd, h->root.root.string); |
1126 | else if (tdef) | |
1127 | (*_bfd_error_handler) | |
fc3e1e3c | 1128 | (_("%s: TLS definition in %B section %A mismatches non-TLS reference in %B"), |
7479dfd4 L |
1129 | tbfd, tsec, ntbfd, h->root.root.string); |
1130 | else | |
1131 | (*_bfd_error_handler) | |
fc3e1e3c | 1132 | (_("%s: TLS reference in %B mismatches non-TLS definition in %B section %A"), |
7479dfd4 L |
1133 | tbfd, ntbfd, ntsec, h->root.root.string); |
1134 | ||
1135 | bfd_set_error (bfd_error_bad_value); | |
1136 | return FALSE; | |
1137 | } | |
1138 | ||
4cc11e76 | 1139 | /* We need to remember if a symbol has a definition in a dynamic |
45d6a902 AM |
1140 | object or is weak in all dynamic objects. Internal and hidden |
1141 | visibility will make it unavailable to dynamic objects. */ | |
f5385ebf | 1142 | if (newdyn && !h->dynamic_def) |
45d6a902 AM |
1143 | { |
1144 | if (!bfd_is_und_section (sec)) | |
f5385ebf | 1145 | h->dynamic_def = 1; |
45d6a902 | 1146 | else |
252b5132 | 1147 | { |
45d6a902 AM |
1148 | /* Check if this symbol is weak in all dynamic objects. If it |
1149 | is the first time we see it in a dynamic object, we mark | |
1150 | if it is weak. Otherwise, we clear it. */ | |
f5385ebf | 1151 | if (!h->ref_dynamic) |
79349b09 | 1152 | { |
45d6a902 | 1153 | if (bind == STB_WEAK) |
f5385ebf | 1154 | h->dynamic_weak = 1; |
252b5132 | 1155 | } |
45d6a902 | 1156 | else if (bind != STB_WEAK) |
f5385ebf | 1157 | h->dynamic_weak = 0; |
252b5132 | 1158 | } |
45d6a902 | 1159 | } |
252b5132 | 1160 | |
45d6a902 AM |
1161 | /* If the old symbol has non-default visibility, we ignore the new |
1162 | definition from a dynamic object. */ | |
1163 | if (newdyn | |
9c7a29a3 | 1164 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1165 | && !bfd_is_und_section (sec)) |
1166 | { | |
1167 | *skip = TRUE; | |
1168 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1169 | h->ref_dynamic = 1; |
45d6a902 AM |
1170 | /* A protected symbol has external availability. Make sure it is |
1171 | recorded as dynamic. | |
1172 | ||
1173 | FIXME: Should we check type and size for protected symbol? */ | |
1174 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1175 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1176 | else |
1177 | return TRUE; | |
1178 | } | |
1179 | else if (!newdyn | |
9c7a29a3 | 1180 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1181 | && h->def_dynamic) |
45d6a902 AM |
1182 | { |
1183 | /* If the new symbol with non-default visibility comes from a | |
1184 | relocatable file and the old definition comes from a dynamic | |
1185 | object, we remove the old definition. */ | |
1186 | if ((*sym_hash)->root.type == bfd_link_hash_indirect) | |
d2dee3b2 L |
1187 | { |
1188 | /* Handle the case where the old dynamic definition is | |
1189 | default versioned. We need to copy the symbol info from | |
1190 | the symbol with default version to the normal one if it | |
1191 | was referenced before. */ | |
1192 | if (h->ref_regular) | |
1193 | { | |
d2dee3b2 | 1194 | struct elf_link_hash_entry *vh = *sym_hash; |
91d6fa6a | 1195 | |
d2dee3b2 L |
1196 | vh->root.type = h->root.type; |
1197 | h->root.type = bfd_link_hash_indirect; | |
1198 | (*bed->elf_backend_copy_indirect_symbol) (info, vh, h); | |
1199 | /* Protected symbols will override the dynamic definition | |
1200 | with default version. */ | |
1201 | if (ELF_ST_VISIBILITY (sym->st_other) == STV_PROTECTED) | |
1202 | { | |
1203 | h->root.u.i.link = (struct bfd_link_hash_entry *) vh; | |
1204 | vh->dynamic_def = 1; | |
1205 | vh->ref_dynamic = 1; | |
1206 | } | |
1207 | else | |
1208 | { | |
1209 | h->root.type = vh->root.type; | |
1210 | vh->ref_dynamic = 0; | |
1211 | /* We have to hide it here since it was made dynamic | |
1212 | global with extra bits when the symbol info was | |
1213 | copied from the old dynamic definition. */ | |
1214 | (*bed->elf_backend_hide_symbol) (info, vh, TRUE); | |
1215 | } | |
1216 | h = vh; | |
1217 | } | |
1218 | else | |
1219 | h = *sym_hash; | |
1220 | } | |
1de1a317 | 1221 | |
f6e332e6 | 1222 | if ((h->root.u.undef.next || info->hash->undefs_tail == &h->root) |
1de1a317 L |
1223 | && bfd_is_und_section (sec)) |
1224 | { | |
1225 | /* If the new symbol is undefined and the old symbol was | |
1226 | also undefined before, we need to make sure | |
1227 | _bfd_generic_link_add_one_symbol doesn't mess | |
f6e332e6 | 1228 | up the linker hash table undefs list. Since the old |
1de1a317 L |
1229 | definition came from a dynamic object, it is still on the |
1230 | undefs list. */ | |
1231 | h->root.type = bfd_link_hash_undefined; | |
1de1a317 L |
1232 | h->root.u.undef.abfd = abfd; |
1233 | } | |
1234 | else | |
1235 | { | |
1236 | h->root.type = bfd_link_hash_new; | |
1237 | h->root.u.undef.abfd = NULL; | |
1238 | } | |
1239 | ||
f5385ebf | 1240 | if (h->def_dynamic) |
252b5132 | 1241 | { |
f5385ebf AM |
1242 | h->def_dynamic = 0; |
1243 | h->ref_dynamic = 1; | |
1244 | h->dynamic_def = 1; | |
45d6a902 AM |
1245 | } |
1246 | /* FIXME: Should we check type and size for protected symbol? */ | |
1247 | h->size = 0; | |
1248 | h->type = 0; | |
1249 | return TRUE; | |
1250 | } | |
14a793b2 | 1251 | |
3e7a7d11 NC |
1252 | if (bind == STB_GNU_UNIQUE) |
1253 | h->unique_global = 1; | |
1254 | ||
15b43f48 AM |
1255 | /* If a new weak symbol definition comes from a regular file and the |
1256 | old symbol comes from a dynamic library, we treat the new one as | |
1257 | strong. Similarly, an old weak symbol definition from a regular | |
1258 | file is treated as strong when the new symbol comes from a dynamic | |
1259 | library. Further, an old weak symbol from a dynamic library is | |
1260 | treated as strong if the new symbol is from a dynamic library. | |
1261 | This reflects the way glibc's ld.so works. | |
1262 | ||
1263 | Do this before setting *type_change_ok or *size_change_ok so that | |
1264 | we warn properly when dynamic library symbols are overridden. */ | |
1265 | ||
1266 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1267 | newweak = FALSE; |
15b43f48 | 1268 | if (olddef && newdyn) |
0f8a2703 AM |
1269 | oldweak = FALSE; |
1270 | ||
d334575b | 1271 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1272 | if (newfunc && oldfunc) |
fcb93ecf PB |
1273 | *type_change_ok = TRUE; |
1274 | ||
79349b09 AM |
1275 | /* It's OK to change the type if either the existing symbol or the |
1276 | new symbol is weak. A type change is also OK if the old symbol | |
1277 | is undefined and the new symbol is defined. */ | |
252b5132 | 1278 | |
79349b09 AM |
1279 | if (oldweak |
1280 | || newweak | |
1281 | || (newdef | |
1282 | && h->root.type == bfd_link_hash_undefined)) | |
1283 | *type_change_ok = TRUE; | |
1284 | ||
1285 | /* It's OK to change the size if either the existing symbol or the | |
1286 | new symbol is weak, or if the old symbol is undefined. */ | |
1287 | ||
1288 | if (*type_change_ok | |
1289 | || h->root.type == bfd_link_hash_undefined) | |
1290 | *size_change_ok = TRUE; | |
45d6a902 | 1291 | |
45d6a902 AM |
1292 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1293 | symbol, respectively, appears to be a common symbol in a dynamic | |
1294 | object. If a symbol appears in an uninitialized section, and is | |
1295 | not weak, and is not a function, then it may be a common symbol | |
1296 | which was resolved when the dynamic object was created. We want | |
1297 | to treat such symbols specially, because they raise special | |
1298 | considerations when setting the symbol size: if the symbol | |
1299 | appears as a common symbol in a regular object, and the size in | |
1300 | the regular object is larger, we must make sure that we use the | |
1301 | larger size. This problematic case can always be avoided in C, | |
1302 | but it must be handled correctly when using Fortran shared | |
1303 | libraries. | |
1304 | ||
1305 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1306 | likewise for OLDDYNCOMMON and OLDDEF. | |
1307 | ||
1308 | Note that this test is just a heuristic, and that it is quite | |
1309 | possible to have an uninitialized symbol in a shared object which | |
1310 | is really a definition, rather than a common symbol. This could | |
1311 | lead to some minor confusion when the symbol really is a common | |
1312 | symbol in some regular object. However, I think it will be | |
1313 | harmless. */ | |
1314 | ||
1315 | if (newdyn | |
1316 | && newdef | |
79349b09 | 1317 | && !newweak |
45d6a902 AM |
1318 | && (sec->flags & SEC_ALLOC) != 0 |
1319 | && (sec->flags & SEC_LOAD) == 0 | |
1320 | && sym->st_size > 0 | |
0a36a439 | 1321 | && !newfunc) |
45d6a902 AM |
1322 | newdyncommon = TRUE; |
1323 | else | |
1324 | newdyncommon = FALSE; | |
1325 | ||
1326 | if (olddyn | |
1327 | && olddef | |
1328 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1329 | && h->def_dynamic |
45d6a902 AM |
1330 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1331 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1332 | && h->size > 0 | |
0a36a439 | 1333 | && !oldfunc) |
45d6a902 AM |
1334 | olddyncommon = TRUE; |
1335 | else | |
1336 | olddyncommon = FALSE; | |
1337 | ||
a4d8e49b L |
1338 | /* We now know everything about the old and new symbols. We ask the |
1339 | backend to check if we can merge them. */ | |
a4d8e49b L |
1340 | if (bed->merge_symbol |
1341 | && !bed->merge_symbol (info, sym_hash, h, sym, psec, pvalue, | |
1342 | pold_alignment, skip, override, | |
1343 | type_change_ok, size_change_ok, | |
1344 | &newdyn, &newdef, &newdyncommon, &newweak, | |
1345 | abfd, &sec, | |
1346 | &olddyn, &olddef, &olddyncommon, &oldweak, | |
1347 | oldbfd, &oldsec)) | |
1348 | return FALSE; | |
1349 | ||
45d6a902 AM |
1350 | /* If both the old and the new symbols look like common symbols in a |
1351 | dynamic object, set the size of the symbol to the larger of the | |
1352 | two. */ | |
1353 | ||
1354 | if (olddyncommon | |
1355 | && newdyncommon | |
1356 | && sym->st_size != h->size) | |
1357 | { | |
1358 | /* Since we think we have two common symbols, issue a multiple | |
1359 | common warning if desired. Note that we only warn if the | |
1360 | size is different. If the size is the same, we simply let | |
1361 | the old symbol override the new one as normally happens with | |
1362 | symbols defined in dynamic objects. */ | |
1363 | ||
1364 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1365 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 | 1366 | return FALSE; |
252b5132 | 1367 | |
45d6a902 AM |
1368 | if (sym->st_size > h->size) |
1369 | h->size = sym->st_size; | |
252b5132 | 1370 | |
45d6a902 | 1371 | *size_change_ok = TRUE; |
252b5132 RH |
1372 | } |
1373 | ||
45d6a902 AM |
1374 | /* If we are looking at a dynamic object, and we have found a |
1375 | definition, we need to see if the symbol was already defined by | |
1376 | some other object. If so, we want to use the existing | |
1377 | definition, and we do not want to report a multiple symbol | |
1378 | definition error; we do this by clobbering *PSEC to be | |
1379 | bfd_und_section_ptr. | |
1380 | ||
1381 | We treat a common symbol as a definition if the symbol in the | |
1382 | shared library is a function, since common symbols always | |
1383 | represent variables; this can cause confusion in principle, but | |
1384 | any such confusion would seem to indicate an erroneous program or | |
1385 | shared library. We also permit a common symbol in a regular | |
79349b09 | 1386 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1387 | |
1388 | if (newdyn | |
1389 | && newdef | |
77cfaee6 | 1390 | && (olddef |
45d6a902 | 1391 | || (h->root.type == bfd_link_hash_common |
0a36a439 | 1392 | && (newweak || newfunc)))) |
45d6a902 AM |
1393 | { |
1394 | *override = TRUE; | |
1395 | newdef = FALSE; | |
1396 | newdyncommon = FALSE; | |
252b5132 | 1397 | |
45d6a902 AM |
1398 | *psec = sec = bfd_und_section_ptr; |
1399 | *size_change_ok = TRUE; | |
252b5132 | 1400 | |
45d6a902 AM |
1401 | /* If we get here when the old symbol is a common symbol, then |
1402 | we are explicitly letting it override a weak symbol or | |
1403 | function in a dynamic object, and we don't want to warn about | |
1404 | a type change. If the old symbol is a defined symbol, a type | |
1405 | change warning may still be appropriate. */ | |
252b5132 | 1406 | |
45d6a902 AM |
1407 | if (h->root.type == bfd_link_hash_common) |
1408 | *type_change_ok = TRUE; | |
1409 | } | |
1410 | ||
1411 | /* Handle the special case of an old common symbol merging with a | |
1412 | new symbol which looks like a common symbol in a shared object. | |
1413 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1414 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1415 | right thing. */ | |
45d6a902 AM |
1416 | |
1417 | if (newdyncommon | |
1418 | && h->root.type == bfd_link_hash_common) | |
1419 | { | |
1420 | *override = TRUE; | |
1421 | newdef = FALSE; | |
1422 | newdyncommon = FALSE; | |
1423 | *pvalue = sym->st_size; | |
a4d8e49b | 1424 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1425 | *size_change_ok = TRUE; |
1426 | } | |
1427 | ||
c5e2cead | 1428 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1429 | if (newdef && olddef && newweak) |
54ac0771 | 1430 | { |
35ed3f94 AM |
1431 | /* Don't skip new non-IR weak syms. */ |
1432 | if (!((oldbfd->flags & BFD_PLUGIN) != 0 | |
1433 | && (abfd->flags & BFD_PLUGIN) == 0)) | |
1434 | *skip = TRUE; | |
54ac0771 L |
1435 | |
1436 | /* Merge st_other. If the symbol already has a dynamic index, | |
1437 | but visibility says it should not be visible, turn it into a | |
1438 | local symbol. */ | |
1439 | elf_merge_st_other (abfd, h, sym, newdef, newdyn); | |
1440 | if (h->dynindx != -1) | |
1441 | switch (ELF_ST_VISIBILITY (h->other)) | |
1442 | { | |
1443 | case STV_INTERNAL: | |
1444 | case STV_HIDDEN: | |
1445 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1446 | break; | |
1447 | } | |
1448 | } | |
c5e2cead | 1449 | |
45d6a902 AM |
1450 | /* If the old symbol is from a dynamic object, and the new symbol is |
1451 | a definition which is not from a dynamic object, then the new | |
1452 | symbol overrides the old symbol. Symbols from regular files | |
1453 | always take precedence over symbols from dynamic objects, even if | |
1454 | they are defined after the dynamic object in the link. | |
1455 | ||
1456 | As above, we again permit a common symbol in a regular object to | |
1457 | override a definition in a shared object if the shared object | |
0f8a2703 | 1458 | symbol is a function or is weak. */ |
45d6a902 AM |
1459 | |
1460 | flip = NULL; | |
77cfaee6 | 1461 | if (!newdyn |
45d6a902 AM |
1462 | && (newdef |
1463 | || (bfd_is_com_section (sec) | |
0a36a439 | 1464 | && (oldweak || oldfunc))) |
45d6a902 AM |
1465 | && olddyn |
1466 | && olddef | |
f5385ebf | 1467 | && h->def_dynamic) |
45d6a902 AM |
1468 | { |
1469 | /* Change the hash table entry to undefined, and let | |
1470 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1471 | new definition. */ | |
1472 | ||
1473 | h->root.type = bfd_link_hash_undefined; | |
1474 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1475 | *size_change_ok = TRUE; | |
1476 | ||
1477 | olddef = FALSE; | |
1478 | olddyncommon = FALSE; | |
1479 | ||
1480 | /* We again permit a type change when a common symbol may be | |
1481 | overriding a function. */ | |
1482 | ||
1483 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1484 | { |
1485 | if (oldfunc) | |
1486 | { | |
1487 | /* If a common symbol overrides a function, make sure | |
1488 | that it isn't defined dynamically nor has type | |
1489 | function. */ | |
1490 | h->def_dynamic = 0; | |
1491 | h->type = STT_NOTYPE; | |
1492 | } | |
1493 | *type_change_ok = TRUE; | |
1494 | } | |
45d6a902 AM |
1495 | |
1496 | if ((*sym_hash)->root.type == bfd_link_hash_indirect) | |
1497 | flip = *sym_hash; | |
1498 | else | |
1499 | /* This union may have been set to be non-NULL when this symbol | |
1500 | was seen in a dynamic object. We must force the union to be | |
1501 | NULL, so that it is correct for a regular symbol. */ | |
1502 | h->verinfo.vertree = NULL; | |
1503 | } | |
1504 | ||
1505 | /* Handle the special case of a new common symbol merging with an | |
1506 | old symbol that looks like it might be a common symbol defined in | |
1507 | a shared object. Note that we have already handled the case in | |
1508 | which a new common symbol should simply override the definition | |
1509 | in the shared library. */ | |
1510 | ||
1511 | if (! newdyn | |
1512 | && bfd_is_com_section (sec) | |
1513 | && olddyncommon) | |
1514 | { | |
1515 | /* It would be best if we could set the hash table entry to a | |
1516 | common symbol, but we don't know what to use for the section | |
1517 | or the alignment. */ | |
1518 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1519 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 AM |
1520 | return FALSE; |
1521 | ||
4cc11e76 | 1522 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1523 | larger, pretend that the new symbol has its size. */ |
1524 | ||
1525 | if (h->size > *pvalue) | |
1526 | *pvalue = h->size; | |
1527 | ||
af44c138 L |
1528 | /* We need to remember the alignment required by the symbol |
1529 | in the dynamic object. */ | |
1530 | BFD_ASSERT (pold_alignment); | |
1531 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1532 | |
1533 | olddef = FALSE; | |
1534 | olddyncommon = FALSE; | |
1535 | ||
1536 | h->root.type = bfd_link_hash_undefined; | |
1537 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1538 | ||
1539 | *size_change_ok = TRUE; | |
1540 | *type_change_ok = TRUE; | |
1541 | ||
1542 | if ((*sym_hash)->root.type == bfd_link_hash_indirect) | |
1543 | flip = *sym_hash; | |
1544 | else | |
1545 | h->verinfo.vertree = NULL; | |
1546 | } | |
1547 | ||
1548 | if (flip != NULL) | |
1549 | { | |
1550 | /* Handle the case where we had a versioned symbol in a dynamic | |
1551 | library and now find a definition in a normal object. In this | |
1552 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1553 | flip->root.type = h->root.type; |
00cbee0a | 1554 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1555 | h->root.type = bfd_link_hash_indirect; |
1556 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1557 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1558 | if (h->def_dynamic) |
45d6a902 | 1559 | { |
f5385ebf AM |
1560 | h->def_dynamic = 0; |
1561 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1562 | } |
1563 | } | |
1564 | ||
45d6a902 AM |
1565 | return TRUE; |
1566 | } | |
1567 | ||
1568 | /* This function is called to create an indirect symbol from the | |
1569 | default for the symbol with the default version if needed. The | |
1570 | symbol is described by H, NAME, SYM, PSEC, VALUE, and OVERRIDE. We | |
0f8a2703 | 1571 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1572 | |
28caa186 | 1573 | static bfd_boolean |
268b6b39 AM |
1574 | _bfd_elf_add_default_symbol (bfd *abfd, |
1575 | struct bfd_link_info *info, | |
1576 | struct elf_link_hash_entry *h, | |
1577 | const char *name, | |
1578 | Elf_Internal_Sym *sym, | |
1579 | asection **psec, | |
1580 | bfd_vma *value, | |
1581 | bfd_boolean *dynsym, | |
0f8a2703 | 1582 | bfd_boolean override) |
45d6a902 AM |
1583 | { |
1584 | bfd_boolean type_change_ok; | |
1585 | bfd_boolean size_change_ok; | |
1586 | bfd_boolean skip; | |
1587 | char *shortname; | |
1588 | struct elf_link_hash_entry *hi; | |
1589 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1590 | const struct elf_backend_data *bed; |
45d6a902 AM |
1591 | bfd_boolean collect; |
1592 | bfd_boolean dynamic; | |
1593 | char *p; | |
1594 | size_t len, shortlen; | |
1595 | asection *sec; | |
1596 | ||
1597 | /* If this symbol has a version, and it is the default version, we | |
1598 | create an indirect symbol from the default name to the fully | |
1599 | decorated name. This will cause external references which do not | |
1600 | specify a version to be bound to this version of the symbol. */ | |
1601 | p = strchr (name, ELF_VER_CHR); | |
1602 | if (p == NULL || p[1] != ELF_VER_CHR) | |
1603 | return TRUE; | |
1604 | ||
1605 | if (override) | |
1606 | { | |
4cc11e76 | 1607 | /* We are overridden by an old definition. We need to check if we |
45d6a902 AM |
1608 | need to create the indirect symbol from the default name. */ |
1609 | hi = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, | |
1610 | FALSE, FALSE); | |
1611 | BFD_ASSERT (hi != NULL); | |
1612 | if (hi == h) | |
1613 | return TRUE; | |
1614 | while (hi->root.type == bfd_link_hash_indirect | |
1615 | || hi->root.type == bfd_link_hash_warning) | |
1616 | { | |
1617 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1618 | if (hi == h) | |
1619 | return TRUE; | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | bed = get_elf_backend_data (abfd); | |
1624 | collect = bed->collect; | |
1625 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1626 | ||
1627 | shortlen = p - name; | |
a50b1753 | 1628 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1629 | if (shortname == NULL) |
1630 | return FALSE; | |
1631 | memcpy (shortname, name, shortlen); | |
1632 | shortname[shortlen] = '\0'; | |
1633 | ||
1634 | /* We are going to create a new symbol. Merge it with any existing | |
1635 | symbol with this name. For the purposes of the merge, act as | |
1636 | though we were defining the symbol we just defined, although we | |
1637 | actually going to define an indirect symbol. */ | |
1638 | type_change_ok = FALSE; | |
1639 | size_change_ok = FALSE; | |
1640 | sec = *psec; | |
1641 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
af44c138 L |
1642 | NULL, &hi, &skip, &override, |
1643 | &type_change_ok, &size_change_ok)) | |
45d6a902 AM |
1644 | return FALSE; |
1645 | ||
1646 | if (skip) | |
1647 | goto nondefault; | |
1648 | ||
1649 | if (! override) | |
1650 | { | |
1651 | bh = &hi->root; | |
1652 | if (! (_bfd_generic_link_add_one_symbol | |
1653 | (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, | |
268b6b39 | 1654 | 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1655 | return FALSE; |
1656 | hi = (struct elf_link_hash_entry *) bh; | |
1657 | } | |
1658 | else | |
1659 | { | |
1660 | /* In this case the symbol named SHORTNAME is overriding the | |
1661 | indirect symbol we want to add. We were planning on making | |
1662 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1663 | is the name without a version. NAME is the fully versioned | |
1664 | name, and it is the default version. | |
1665 | ||
1666 | Overriding means that we already saw a definition for the | |
1667 | symbol SHORTNAME in a regular object, and it is overriding | |
1668 | the symbol defined in the dynamic object. | |
1669 | ||
1670 | When this happens, we actually want to change NAME, the | |
1671 | symbol we just added, to refer to SHORTNAME. This will cause | |
1672 | references to NAME in the shared object to become references | |
1673 | to SHORTNAME in the regular object. This is what we expect | |
1674 | when we override a function in a shared object: that the | |
1675 | references in the shared object will be mapped to the | |
1676 | definition in the regular object. */ | |
1677 | ||
1678 | while (hi->root.type == bfd_link_hash_indirect | |
1679 | || hi->root.type == bfd_link_hash_warning) | |
1680 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1681 | ||
1682 | h->root.type = bfd_link_hash_indirect; | |
1683 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1684 | if (h->def_dynamic) |
45d6a902 | 1685 | { |
f5385ebf AM |
1686 | h->def_dynamic = 0; |
1687 | hi->ref_dynamic = 1; | |
1688 | if (hi->ref_regular | |
1689 | || hi->def_regular) | |
45d6a902 | 1690 | { |
c152c796 | 1691 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1692 | return FALSE; |
1693 | } | |
1694 | } | |
1695 | ||
1696 | /* Now set HI to H, so that the following code will set the | |
1697 | other fields correctly. */ | |
1698 | hi = h; | |
1699 | } | |
1700 | ||
fab4a87f L |
1701 | /* Check if HI is a warning symbol. */ |
1702 | if (hi->root.type == bfd_link_hash_warning) | |
1703 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1704 | ||
45d6a902 AM |
1705 | /* If there is a duplicate definition somewhere, then HI may not |
1706 | point to an indirect symbol. We will have reported an error to | |
1707 | the user in that case. */ | |
1708 | ||
1709 | if (hi->root.type == bfd_link_hash_indirect) | |
1710 | { | |
1711 | struct elf_link_hash_entry *ht; | |
1712 | ||
45d6a902 | 1713 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1714 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 AM |
1715 | |
1716 | /* See if the new flags lead us to realize that the symbol must | |
1717 | be dynamic. */ | |
1718 | if (! *dynsym) | |
1719 | { | |
1720 | if (! dynamic) | |
1721 | { | |
ca4a656b | 1722 | if (! info->executable |
f5385ebf | 1723 | || hi->ref_dynamic) |
45d6a902 AM |
1724 | *dynsym = TRUE; |
1725 | } | |
1726 | else | |
1727 | { | |
f5385ebf | 1728 | if (hi->ref_regular) |
45d6a902 AM |
1729 | *dynsym = TRUE; |
1730 | } | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | /* We also need to define an indirection from the nondefault version | |
1735 | of the symbol. */ | |
1736 | ||
1737 | nondefault: | |
1738 | len = strlen (name); | |
a50b1753 | 1739 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1740 | if (shortname == NULL) |
1741 | return FALSE; | |
1742 | memcpy (shortname, name, shortlen); | |
1743 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1744 | ||
1745 | /* Once again, merge with any existing symbol. */ | |
1746 | type_change_ok = FALSE; | |
1747 | size_change_ok = FALSE; | |
1748 | sec = *psec; | |
1749 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
af44c138 L |
1750 | NULL, &hi, &skip, &override, |
1751 | &type_change_ok, &size_change_ok)) | |
45d6a902 AM |
1752 | return FALSE; |
1753 | ||
1754 | if (skip) | |
1755 | return TRUE; | |
1756 | ||
1757 | if (override) | |
1758 | { | |
1759 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1760 | the type of override we do in the case above unless it is | |
4cc11e76 | 1761 | overridden by a versioned definition. */ |
45d6a902 AM |
1762 | if (hi->root.type != bfd_link_hash_defined |
1763 | && hi->root.type != bfd_link_hash_defweak) | |
1764 | (*_bfd_error_handler) | |
d003868e AM |
1765 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1766 | abfd, shortname); | |
45d6a902 AM |
1767 | } |
1768 | else | |
1769 | { | |
1770 | bh = &hi->root; | |
1771 | if (! (_bfd_generic_link_add_one_symbol | |
1772 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1773 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1774 | return FALSE; |
1775 | hi = (struct elf_link_hash_entry *) bh; | |
1776 | ||
1777 | /* If there is a duplicate definition somewhere, then HI may not | |
1778 | point to an indirect symbol. We will have reported an error | |
1779 | to the user in that case. */ | |
1780 | ||
1781 | if (hi->root.type == bfd_link_hash_indirect) | |
1782 | { | |
fcfa13d2 | 1783 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
45d6a902 AM |
1784 | |
1785 | /* See if the new flags lead us to realize that the symbol | |
1786 | must be dynamic. */ | |
1787 | if (! *dynsym) | |
1788 | { | |
1789 | if (! dynamic) | |
1790 | { | |
ca4a656b | 1791 | if (! info->executable |
f5385ebf | 1792 | || hi->ref_dynamic) |
45d6a902 AM |
1793 | *dynsym = TRUE; |
1794 | } | |
1795 | else | |
1796 | { | |
f5385ebf | 1797 | if (hi->ref_regular) |
45d6a902 AM |
1798 | *dynsym = TRUE; |
1799 | } | |
1800 | } | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | return TRUE; | |
1805 | } | |
1806 | \f | |
1807 | /* This routine is used to export all defined symbols into the dynamic | |
1808 | symbol table. It is called via elf_link_hash_traverse. */ | |
1809 | ||
28caa186 | 1810 | static bfd_boolean |
268b6b39 | 1811 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1812 | { |
a50b1753 | 1813 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 1814 | |
55255dae L |
1815 | /* Ignore this if we won't export it. */ |
1816 | if (!eif->info->export_dynamic && !h->dynamic) | |
1817 | return TRUE; | |
1818 | ||
45d6a902 AM |
1819 | /* Ignore indirect symbols. These are added by the versioning code. */ |
1820 | if (h->root.type == bfd_link_hash_indirect) | |
1821 | return TRUE; | |
1822 | ||
1823 | if (h->root.type == bfd_link_hash_warning) | |
1824 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1825 | ||
1826 | if (h->dynindx == -1 | |
f5385ebf AM |
1827 | && (h->def_regular |
1828 | || h->ref_regular)) | |
45d6a902 | 1829 | { |
1e8fa21e | 1830 | bfd_boolean hide; |
45d6a902 | 1831 | |
1e8fa21e | 1832 | if (eif->verdefs == NULL |
09e2aba4 | 1833 | || (bfd_find_version_for_sym (eif->verdefs, h->root.root.string, &hide) |
1e8fa21e | 1834 | && !hide)) |
45d6a902 | 1835 | { |
c152c796 | 1836 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
1837 | { |
1838 | eif->failed = TRUE; | |
1839 | return FALSE; | |
1840 | } | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | return TRUE; | |
1845 | } | |
1846 | \f | |
1847 | /* Look through the symbols which are defined in other shared | |
1848 | libraries and referenced here. Update the list of version | |
1849 | dependencies. This will be put into the .gnu.version_r section. | |
1850 | This function is called via elf_link_hash_traverse. */ | |
1851 | ||
28caa186 | 1852 | static bfd_boolean |
268b6b39 AM |
1853 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
1854 | void *data) | |
45d6a902 | 1855 | { |
a50b1753 | 1856 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
1857 | Elf_Internal_Verneed *t; |
1858 | Elf_Internal_Vernaux *a; | |
1859 | bfd_size_type amt; | |
1860 | ||
1861 | if (h->root.type == bfd_link_hash_warning) | |
1862 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1863 | ||
1864 | /* We only care about symbols defined in shared objects with version | |
1865 | information. */ | |
f5385ebf AM |
1866 | if (!h->def_dynamic |
1867 | || h->def_regular | |
45d6a902 AM |
1868 | || h->dynindx == -1 |
1869 | || h->verinfo.verdef == NULL) | |
1870 | return TRUE; | |
1871 | ||
1872 | /* See if we already know about this version. */ | |
28caa186 AM |
1873 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
1874 | t != NULL; | |
1875 | t = t->vn_nextref) | |
45d6a902 AM |
1876 | { |
1877 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
1878 | continue; | |
1879 | ||
1880 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1881 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
1882 | return TRUE; | |
1883 | ||
1884 | break; | |
1885 | } | |
1886 | ||
1887 | /* This is a new version. Add it to tree we are building. */ | |
1888 | ||
1889 | if (t == NULL) | |
1890 | { | |
1891 | amt = sizeof *t; | |
a50b1753 | 1892 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
1893 | if (t == NULL) |
1894 | { | |
1895 | rinfo->failed = TRUE; | |
1896 | return FALSE; | |
1897 | } | |
1898 | ||
1899 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
1900 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
1901 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
1902 | } |
1903 | ||
1904 | amt = sizeof *a; | |
a50b1753 | 1905 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
1906 | if (a == NULL) |
1907 | { | |
1908 | rinfo->failed = TRUE; | |
1909 | return FALSE; | |
1910 | } | |
45d6a902 AM |
1911 | |
1912 | /* Note that we are copying a string pointer here, and testing it | |
1913 | above. If bfd_elf_string_from_elf_section is ever changed to | |
1914 | discard the string data when low in memory, this will have to be | |
1915 | fixed. */ | |
1916 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
1917 | ||
1918 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
1919 | a->vna_nextptr = t->vn_auxptr; | |
1920 | ||
1921 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
1922 | ++rinfo->vers; | |
1923 | ||
1924 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
1925 | ||
1926 | t->vn_auxptr = a; | |
1927 | ||
1928 | return TRUE; | |
1929 | } | |
1930 | ||
1931 | /* Figure out appropriate versions for all the symbols. We may not | |
1932 | have the version number script until we have read all of the input | |
1933 | files, so until that point we don't know which symbols should be | |
1934 | local. This function is called via elf_link_hash_traverse. */ | |
1935 | ||
28caa186 | 1936 | static bfd_boolean |
268b6b39 | 1937 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1938 | { |
28caa186 | 1939 | struct elf_info_failed *sinfo; |
45d6a902 | 1940 | struct bfd_link_info *info; |
9c5bfbb7 | 1941 | const struct elf_backend_data *bed; |
45d6a902 AM |
1942 | struct elf_info_failed eif; |
1943 | char *p; | |
1944 | bfd_size_type amt; | |
1945 | ||
a50b1753 | 1946 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
1947 | info = sinfo->info; |
1948 | ||
1949 | if (h->root.type == bfd_link_hash_warning) | |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1951 | ||
1952 | /* Fix the symbol flags. */ | |
1953 | eif.failed = FALSE; | |
1954 | eif.info = info; | |
1955 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
1956 | { | |
1957 | if (eif.failed) | |
1958 | sinfo->failed = TRUE; | |
1959 | return FALSE; | |
1960 | } | |
1961 | ||
1962 | /* We only need version numbers for symbols defined in regular | |
1963 | objects. */ | |
f5385ebf | 1964 | if (!h->def_regular) |
45d6a902 AM |
1965 | return TRUE; |
1966 | ||
28caa186 | 1967 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
1968 | p = strchr (h->root.root.string, ELF_VER_CHR); |
1969 | if (p != NULL && h->verinfo.vertree == NULL) | |
1970 | { | |
1971 | struct bfd_elf_version_tree *t; | |
1972 | bfd_boolean hidden; | |
1973 | ||
1974 | hidden = TRUE; | |
1975 | ||
1976 | /* There are two consecutive ELF_VER_CHR characters if this is | |
1977 | not a hidden symbol. */ | |
1978 | ++p; | |
1979 | if (*p == ELF_VER_CHR) | |
1980 | { | |
1981 | hidden = FALSE; | |
1982 | ++p; | |
1983 | } | |
1984 | ||
1985 | /* If there is no version string, we can just return out. */ | |
1986 | if (*p == '\0') | |
1987 | { | |
1988 | if (hidden) | |
f5385ebf | 1989 | h->hidden = 1; |
45d6a902 AM |
1990 | return TRUE; |
1991 | } | |
1992 | ||
1993 | /* Look for the version. If we find it, it is no longer weak. */ | |
1994 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
1995 | { | |
1996 | if (strcmp (t->name, p) == 0) | |
1997 | { | |
1998 | size_t len; | |
1999 | char *alc; | |
2000 | struct bfd_elf_version_expr *d; | |
2001 | ||
2002 | len = p - h->root.root.string; | |
a50b1753 | 2003 | alc = (char *) bfd_malloc (len); |
45d6a902 | 2004 | if (alc == NULL) |
14b1c01e AM |
2005 | { |
2006 | sinfo->failed = TRUE; | |
2007 | return FALSE; | |
2008 | } | |
45d6a902 AM |
2009 | memcpy (alc, h->root.root.string, len - 1); |
2010 | alc[len - 1] = '\0'; | |
2011 | if (alc[len - 2] == ELF_VER_CHR) | |
2012 | alc[len - 2] = '\0'; | |
2013 | ||
2014 | h->verinfo.vertree = t; | |
2015 | t->used = TRUE; | |
2016 | d = NULL; | |
2017 | ||
108ba305 JJ |
2018 | if (t->globals.list != NULL) |
2019 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2020 | |
2021 | /* See if there is anything to force this symbol to | |
2022 | local scope. */ | |
108ba305 | 2023 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2024 | { |
108ba305 JJ |
2025 | d = (*t->match) (&t->locals, NULL, alc); |
2026 | if (d != NULL | |
2027 | && h->dynindx != -1 | |
108ba305 JJ |
2028 | && ! info->export_dynamic) |
2029 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2030 | } |
2031 | ||
2032 | free (alc); | |
2033 | break; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | /* If we are building an application, we need to create a | |
2038 | version node for this version. */ | |
36af4a4e | 2039 | if (t == NULL && info->executable) |
45d6a902 AM |
2040 | { |
2041 | struct bfd_elf_version_tree **pp; | |
2042 | int version_index; | |
2043 | ||
2044 | /* If we aren't going to export this symbol, we don't need | |
2045 | to worry about it. */ | |
2046 | if (h->dynindx == -1) | |
2047 | return TRUE; | |
2048 | ||
2049 | amt = sizeof *t; | |
a50b1753 | 2050 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, amt); |
45d6a902 AM |
2051 | if (t == NULL) |
2052 | { | |
2053 | sinfo->failed = TRUE; | |
2054 | return FALSE; | |
2055 | } | |
2056 | ||
45d6a902 | 2057 | t->name = p; |
45d6a902 AM |
2058 | t->name_indx = (unsigned int) -1; |
2059 | t->used = TRUE; | |
2060 | ||
2061 | version_index = 1; | |
2062 | /* Don't count anonymous version tag. */ | |
2063 | if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0) | |
2064 | version_index = 0; | |
2065 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) | |
2066 | ++version_index; | |
2067 | t->vernum = version_index; | |
2068 | ||
2069 | *pp = t; | |
2070 | ||
2071 | h->verinfo.vertree = t; | |
2072 | } | |
2073 | else if (t == NULL) | |
2074 | { | |
2075 | /* We could not find the version for a symbol when | |
2076 | generating a shared archive. Return an error. */ | |
2077 | (*_bfd_error_handler) | |
c55fe096 | 2078 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2079 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2080 | bfd_set_error (bfd_error_bad_value); |
2081 | sinfo->failed = TRUE; | |
2082 | return FALSE; | |
2083 | } | |
2084 | ||
2085 | if (hidden) | |
f5385ebf | 2086 | h->hidden = 1; |
45d6a902 AM |
2087 | } |
2088 | ||
2089 | /* If we don't have a version for this symbol, see if we can find | |
2090 | something. */ | |
2091 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
2092 | { | |
1e8fa21e | 2093 | bfd_boolean hide; |
ae5a3597 | 2094 | |
09e2aba4 | 2095 | h->verinfo.vertree = bfd_find_version_for_sym (sinfo->verdefs, |
1e8fa21e AM |
2096 | h->root.root.string, &hide); |
2097 | if (h->verinfo.vertree != NULL && hide) | |
2098 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2099 | } |
2100 | ||
2101 | return TRUE; | |
2102 | } | |
2103 | \f | |
45d6a902 AM |
2104 | /* Read and swap the relocs from the section indicated by SHDR. This |
2105 | may be either a REL or a RELA section. The relocations are | |
2106 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2107 | which should have already been allocated to contain enough space. | |
2108 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2109 | relocations should be stored. | |
2110 | ||
2111 | Returns FALSE if something goes wrong. */ | |
2112 | ||
2113 | static bfd_boolean | |
268b6b39 | 2114 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2115 | asection *sec, |
268b6b39 AM |
2116 | Elf_Internal_Shdr *shdr, |
2117 | void *external_relocs, | |
2118 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2119 | { |
9c5bfbb7 | 2120 | const struct elf_backend_data *bed; |
268b6b39 | 2121 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2122 | const bfd_byte *erela; |
2123 | const bfd_byte *erelaend; | |
2124 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2125 | Elf_Internal_Shdr *symtab_hdr; |
2126 | size_t nsyms; | |
45d6a902 | 2127 | |
45d6a902 AM |
2128 | /* Position ourselves at the start of the section. */ |
2129 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2130 | return FALSE; | |
2131 | ||
2132 | /* Read the relocations. */ | |
2133 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2134 | return FALSE; | |
2135 | ||
243ef1e0 | 2136 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2137 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2138 | |
45d6a902 AM |
2139 | bed = get_elf_backend_data (abfd); |
2140 | ||
2141 | /* Convert the external relocations to the internal format. */ | |
2142 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2143 | swap_in = bed->s->swap_reloc_in; | |
2144 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2145 | swap_in = bed->s->swap_reloca_in; | |
2146 | else | |
2147 | { | |
2148 | bfd_set_error (bfd_error_wrong_format); | |
2149 | return FALSE; | |
2150 | } | |
2151 | ||
a50b1753 | 2152 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2153 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2154 | irela = internal_relocs; |
2155 | while (erela < erelaend) | |
2156 | { | |
243ef1e0 L |
2157 | bfd_vma r_symndx; |
2158 | ||
45d6a902 | 2159 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2160 | r_symndx = ELF32_R_SYM (irela->r_info); |
2161 | if (bed->s->arch_size == 64) | |
2162 | r_symndx >>= 24; | |
ce98a316 NC |
2163 | if (nsyms > 0) |
2164 | { | |
2165 | if ((size_t) r_symndx >= nsyms) | |
2166 | { | |
2167 | (*_bfd_error_handler) | |
2168 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" | |
2169 | " for offset 0x%lx in section `%A'"), | |
2170 | abfd, sec, | |
2171 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2172 | bfd_set_error (bfd_error_bad_value); | |
2173 | return FALSE; | |
2174 | } | |
2175 | } | |
cf35638d | 2176 | else if (r_symndx != STN_UNDEF) |
243ef1e0 L |
2177 | { |
2178 | (*_bfd_error_handler) | |
ce98a316 NC |
2179 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2180 | " when the object file has no symbol table"), | |
d003868e AM |
2181 | abfd, sec, |
2182 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2183 | bfd_set_error (bfd_error_bad_value); |
2184 | return FALSE; | |
2185 | } | |
45d6a902 AM |
2186 | irela += bed->s->int_rels_per_ext_rel; |
2187 | erela += shdr->sh_entsize; | |
2188 | } | |
2189 | ||
2190 | return TRUE; | |
2191 | } | |
2192 | ||
2193 | /* Read and swap the relocs for a section O. They may have been | |
2194 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2195 | not NULL, they are used as buffers to read into. They are known to | |
2196 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2197 | the return value is allocated using either malloc or bfd_alloc, | |
2198 | according to the KEEP_MEMORY argument. If O has two relocation | |
2199 | sections (both REL and RELA relocations), then the REL_HDR | |
2200 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2201 | RELA_HDR relocations. */ |
45d6a902 AM |
2202 | |
2203 | Elf_Internal_Rela * | |
268b6b39 AM |
2204 | _bfd_elf_link_read_relocs (bfd *abfd, |
2205 | asection *o, | |
2206 | void *external_relocs, | |
2207 | Elf_Internal_Rela *internal_relocs, | |
2208 | bfd_boolean keep_memory) | |
45d6a902 | 2209 | { |
268b6b39 | 2210 | void *alloc1 = NULL; |
45d6a902 | 2211 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2212 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2213 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2214 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2215 | |
d4730f92 BS |
2216 | if (esdo->relocs != NULL) |
2217 | return esdo->relocs; | |
45d6a902 AM |
2218 | |
2219 | if (o->reloc_count == 0) | |
2220 | return NULL; | |
2221 | ||
45d6a902 AM |
2222 | if (internal_relocs == NULL) |
2223 | { | |
2224 | bfd_size_type size; | |
2225 | ||
2226 | size = o->reloc_count; | |
2227 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2228 | if (keep_memory) | |
a50b1753 | 2229 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2230 | else |
a50b1753 | 2231 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2232 | if (internal_relocs == NULL) |
2233 | goto error_return; | |
2234 | } | |
2235 | ||
2236 | if (external_relocs == NULL) | |
2237 | { | |
d4730f92 BS |
2238 | bfd_size_type size = 0; |
2239 | ||
2240 | if (esdo->rel.hdr) | |
2241 | size += esdo->rel.hdr->sh_size; | |
2242 | if (esdo->rela.hdr) | |
2243 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2244 | |
268b6b39 | 2245 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2246 | if (alloc1 == NULL) |
2247 | goto error_return; | |
2248 | external_relocs = alloc1; | |
2249 | } | |
2250 | ||
d4730f92 BS |
2251 | internal_rela_relocs = internal_relocs; |
2252 | if (esdo->rel.hdr) | |
2253 | { | |
2254 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2255 | external_relocs, | |
2256 | internal_relocs)) | |
2257 | goto error_return; | |
2258 | external_relocs = (((bfd_byte *) external_relocs) | |
2259 | + esdo->rel.hdr->sh_size); | |
2260 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2261 | * bed->s->int_rels_per_ext_rel); | |
2262 | } | |
2263 | ||
2264 | if (esdo->rela.hdr | |
2265 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2266 | external_relocs, | |
2267 | internal_rela_relocs))) | |
45d6a902 AM |
2268 | goto error_return; |
2269 | ||
2270 | /* Cache the results for next time, if we can. */ | |
2271 | if (keep_memory) | |
d4730f92 | 2272 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2273 | |
2274 | if (alloc1 != NULL) | |
2275 | free (alloc1); | |
2276 | ||
2277 | /* Don't free alloc2, since if it was allocated we are passing it | |
2278 | back (under the name of internal_relocs). */ | |
2279 | ||
2280 | return internal_relocs; | |
2281 | ||
2282 | error_return: | |
2283 | if (alloc1 != NULL) | |
2284 | free (alloc1); | |
2285 | if (alloc2 != NULL) | |
4dd07732 AM |
2286 | { |
2287 | if (keep_memory) | |
2288 | bfd_release (abfd, alloc2); | |
2289 | else | |
2290 | free (alloc2); | |
2291 | } | |
45d6a902 AM |
2292 | return NULL; |
2293 | } | |
2294 | ||
2295 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2296 | section header for a section containing relocations for O. */ | |
2297 | ||
28caa186 | 2298 | static bfd_boolean |
268b6b39 | 2299 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
d4730f92 | 2300 | struct bfd_elf_section_reloc_data *reldata) |
45d6a902 | 2301 | { |
d4730f92 | 2302 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2303 | |
2304 | /* That allows us to calculate the size of the section. */ | |
d4730f92 | 2305 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2306 | |
2307 | /* The contents field must last into write_object_contents, so we | |
2308 | allocate it with bfd_alloc rather than malloc. Also since we | |
2309 | cannot be sure that the contents will actually be filled in, | |
2310 | we zero the allocated space. */ | |
a50b1753 | 2311 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2312 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2313 | return FALSE; | |
2314 | ||
d4730f92 | 2315 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2316 | { |
2317 | struct elf_link_hash_entry **p; | |
2318 | ||
a50b1753 | 2319 | p = (struct elf_link_hash_entry **) |
d4730f92 | 2320 | bfd_zmalloc (reldata->count * sizeof (struct elf_link_hash_entry *)); |
45d6a902 AM |
2321 | if (p == NULL) |
2322 | return FALSE; | |
2323 | ||
d4730f92 | 2324 | reldata->hashes = p; |
45d6a902 AM |
2325 | } |
2326 | ||
2327 | return TRUE; | |
2328 | } | |
2329 | ||
2330 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2331 | originated from the section given by INPUT_REL_HDR) to the | |
2332 | OUTPUT_BFD. */ | |
2333 | ||
2334 | bfd_boolean | |
268b6b39 AM |
2335 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2336 | asection *input_section, | |
2337 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2338 | Elf_Internal_Rela *internal_relocs, |
2339 | struct elf_link_hash_entry **rel_hash | |
2340 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2341 | { |
2342 | Elf_Internal_Rela *irela; | |
2343 | Elf_Internal_Rela *irelaend; | |
2344 | bfd_byte *erel; | |
d4730f92 | 2345 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2346 | asection *output_section; |
9c5bfbb7 | 2347 | const struct elf_backend_data *bed; |
268b6b39 | 2348 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2349 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2350 | |
2351 | output_section = input_section->output_section; | |
45d6a902 | 2352 | |
d4730f92 BS |
2353 | bed = get_elf_backend_data (output_bfd); |
2354 | esdo = elf_section_data (output_section); | |
2355 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2356 | { |
d4730f92 BS |
2357 | output_reldata = &esdo->rel; |
2358 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2359 | } |
d4730f92 BS |
2360 | else if (esdo->rela.hdr |
2361 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2362 | { |
d4730f92 BS |
2363 | output_reldata = &esdo->rela; |
2364 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2365 | } |
2366 | else | |
2367 | { | |
2368 | (*_bfd_error_handler) | |
d003868e AM |
2369 | (_("%B: relocation size mismatch in %B section %A"), |
2370 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2371 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2372 | return FALSE; |
2373 | } | |
2374 | ||
d4730f92 BS |
2375 | erel = output_reldata->hdr->contents; |
2376 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2377 | irela = internal_relocs; |
2378 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2379 | * bed->s->int_rels_per_ext_rel); | |
2380 | while (irela < irelaend) | |
2381 | { | |
2382 | (*swap_out) (output_bfd, irela, erel); | |
2383 | irela += bed->s->int_rels_per_ext_rel; | |
2384 | erel += input_rel_hdr->sh_entsize; | |
2385 | } | |
2386 | ||
2387 | /* Bump the counter, so that we know where to add the next set of | |
2388 | relocations. */ | |
d4730f92 | 2389 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2390 | |
2391 | return TRUE; | |
2392 | } | |
2393 | \f | |
508c3946 L |
2394 | /* Make weak undefined symbols in PIE dynamic. */ |
2395 | ||
2396 | bfd_boolean | |
2397 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2398 | struct elf_link_hash_entry *h) | |
2399 | { | |
2400 | if (info->pie | |
2401 | && h->dynindx == -1 | |
2402 | && h->root.type == bfd_link_hash_undefweak) | |
2403 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2404 | ||
2405 | return TRUE; | |
2406 | } | |
2407 | ||
45d6a902 AM |
2408 | /* Fix up the flags for a symbol. This handles various cases which |
2409 | can only be fixed after all the input files are seen. This is | |
2410 | currently called by both adjust_dynamic_symbol and | |
2411 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2412 | the face of future changes. */ | |
2413 | ||
28caa186 | 2414 | static bfd_boolean |
268b6b39 AM |
2415 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2416 | struct elf_info_failed *eif) | |
45d6a902 | 2417 | { |
33774f08 | 2418 | const struct elf_backend_data *bed; |
508c3946 | 2419 | |
45d6a902 AM |
2420 | /* If this symbol was mentioned in a non-ELF file, try to set |
2421 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2422 | permit a non-ELF file to correctly refer to a symbol defined in | |
2423 | an ELF dynamic object. */ | |
f5385ebf | 2424 | if (h->non_elf) |
45d6a902 AM |
2425 | { |
2426 | while (h->root.type == bfd_link_hash_indirect) | |
2427 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2428 | ||
2429 | if (h->root.type != bfd_link_hash_defined | |
2430 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2431 | { |
2432 | h->ref_regular = 1; | |
2433 | h->ref_regular_nonweak = 1; | |
2434 | } | |
45d6a902 AM |
2435 | else |
2436 | { | |
2437 | if (h->root.u.def.section->owner != NULL | |
2438 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2439 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2440 | { |
2441 | h->ref_regular = 1; | |
2442 | h->ref_regular_nonweak = 1; | |
2443 | } | |
45d6a902 | 2444 | else |
f5385ebf | 2445 | h->def_regular = 1; |
45d6a902 AM |
2446 | } |
2447 | ||
2448 | if (h->dynindx == -1 | |
f5385ebf AM |
2449 | && (h->def_dynamic |
2450 | || h->ref_dynamic)) | |
45d6a902 | 2451 | { |
c152c796 | 2452 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2453 | { |
2454 | eif->failed = TRUE; | |
2455 | return FALSE; | |
2456 | } | |
2457 | } | |
2458 | } | |
2459 | else | |
2460 | { | |
f5385ebf | 2461 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2462 | was first seen in a non-ELF file. Fortunately, if the symbol |
2463 | was first seen in an ELF file, we're probably OK unless the | |
2464 | symbol was defined in a non-ELF file. Catch that case here. | |
2465 | FIXME: We're still in trouble if the symbol was first seen in | |
2466 | a dynamic object, and then later in a non-ELF regular object. */ | |
2467 | if ((h->root.type == bfd_link_hash_defined | |
2468 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2469 | && !h->def_regular |
45d6a902 AM |
2470 | && (h->root.u.def.section->owner != NULL |
2471 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2472 | != bfd_target_elf_flavour) | |
2473 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2474 | && !h->def_dynamic))) |
2475 | h->def_regular = 1; | |
45d6a902 AM |
2476 | } |
2477 | ||
508c3946 | 2478 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2479 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2480 | if (bed->elf_backend_fixup_symbol | |
2481 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2482 | return FALSE; | |
508c3946 | 2483 | |
45d6a902 AM |
2484 | /* If this is a final link, and the symbol was defined as a common |
2485 | symbol in a regular object file, and there was no definition in | |
2486 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2487 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2488 | flag will not have been set. */ |
2489 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2490 | && !h->def_regular |
2491 | && h->ref_regular | |
2492 | && !h->def_dynamic | |
45d6a902 | 2493 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) |
f5385ebf | 2494 | h->def_regular = 1; |
45d6a902 AM |
2495 | |
2496 | /* If -Bsymbolic was used (which means to bind references to global | |
2497 | symbols to the definition within the shared object), and this | |
2498 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2499 | need a PLT entry. Likewise, if the symbol has non-default |
2500 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2501 | will force it local. */ |
f5385ebf | 2502 | if (h->needs_plt |
45d6a902 | 2503 | && eif->info->shared |
0eddce27 | 2504 | && is_elf_hash_table (eif->info->hash) |
55255dae | 2505 | && (SYMBOLIC_BIND (eif->info, h) |
c1be741f | 2506 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
f5385ebf | 2507 | && h->def_regular) |
45d6a902 | 2508 | { |
45d6a902 AM |
2509 | bfd_boolean force_local; |
2510 | ||
45d6a902 AM |
2511 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2512 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2513 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2514 | } | |
2515 | ||
2516 | /* If a weak undefined symbol has non-default visibility, we also | |
2517 | hide it from the dynamic linker. */ | |
9c7a29a3 | 2518 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 | 2519 | && h->root.type == bfd_link_hash_undefweak) |
33774f08 | 2520 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
45d6a902 AM |
2521 | |
2522 | /* If this is a weak defined symbol in a dynamic object, and we know | |
2523 | the real definition in the dynamic object, copy interesting flags | |
2524 | over to the real definition. */ | |
f6e332e6 | 2525 | if (h->u.weakdef != NULL) |
45d6a902 AM |
2526 | { |
2527 | struct elf_link_hash_entry *weakdef; | |
2528 | ||
f6e332e6 | 2529 | weakdef = h->u.weakdef; |
45d6a902 AM |
2530 | if (h->root.type == bfd_link_hash_indirect) |
2531 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2532 | ||
2533 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2534 | || h->root.type == bfd_link_hash_defweak); | |
f5385ebf | 2535 | BFD_ASSERT (weakdef->def_dynamic); |
45d6a902 AM |
2536 | |
2537 | /* If the real definition is defined by a regular object file, | |
2538 | don't do anything special. See the longer description in | |
2539 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
f5385ebf | 2540 | if (weakdef->def_regular) |
f6e332e6 | 2541 | h->u.weakdef = NULL; |
45d6a902 | 2542 | else |
a26587ba RS |
2543 | { |
2544 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined | |
2545 | || weakdef->root.type == bfd_link_hash_defweak); | |
2546 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2547 | } | |
45d6a902 AM |
2548 | } |
2549 | ||
2550 | return TRUE; | |
2551 | } | |
2552 | ||
2553 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2554 | called via elf_link_hash_traverse, and also calls itself | |
2555 | recursively. */ | |
2556 | ||
28caa186 | 2557 | static bfd_boolean |
268b6b39 | 2558 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2559 | { |
a50b1753 | 2560 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2561 | bfd *dynobj; |
9c5bfbb7 | 2562 | const struct elf_backend_data *bed; |
45d6a902 | 2563 | |
0eddce27 | 2564 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2565 | return FALSE; |
2566 | ||
2567 | if (h->root.type == bfd_link_hash_warning) | |
2568 | { | |
a6aa5195 AM |
2569 | h->got = elf_hash_table (eif->info)->init_got_offset; |
2570 | h->plt = elf_hash_table (eif->info)->init_plt_offset; | |
45d6a902 AM |
2571 | |
2572 | /* When warning symbols are created, they **replace** the "real" | |
2573 | entry in the hash table, thus we never get to see the real | |
2574 | symbol in a hash traversal. So look at it now. */ | |
2575 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2576 | } | |
2577 | ||
2578 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
2579 | if (h->root.type == bfd_link_hash_indirect) | |
2580 | return TRUE; | |
2581 | ||
2582 | /* Fix the symbol flags. */ | |
2583 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2584 | return FALSE; | |
2585 | ||
2586 | /* If this symbol does not require a PLT entry, and it is not | |
2587 | defined by a dynamic object, or is not referenced by a regular | |
2588 | object, ignore it. We do have to handle a weak defined symbol, | |
2589 | even if no regular object refers to it, if we decided to add it | |
2590 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2591 | about symbols which are defined by one dynamic object and | |
2592 | referenced by another one? */ | |
f5385ebf | 2593 | if (!h->needs_plt |
91e21fb7 | 2594 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2595 | && (h->def_regular |
2596 | || !h->def_dynamic | |
2597 | || (!h->ref_regular | |
f6e332e6 | 2598 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2599 | { |
a6aa5195 | 2600 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2601 | return TRUE; |
2602 | } | |
2603 | ||
2604 | /* If we've already adjusted this symbol, don't do it again. This | |
2605 | can happen via a recursive call. */ | |
f5385ebf | 2606 | if (h->dynamic_adjusted) |
45d6a902 AM |
2607 | return TRUE; |
2608 | ||
2609 | /* Don't look at this symbol again. Note that we must set this | |
2610 | after checking the above conditions, because we may look at a | |
2611 | symbol once, decide not to do anything, and then get called | |
2612 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2613 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2614 | |
2615 | /* If this is a weak definition, and we know a real definition, and | |
2616 | the real symbol is not itself defined by a regular object file, | |
2617 | then get a good value for the real definition. We handle the | |
2618 | real symbol first, for the convenience of the backend routine. | |
2619 | ||
2620 | Note that there is a confusing case here. If the real definition | |
2621 | is defined by a regular object file, we don't get the real symbol | |
2622 | from the dynamic object, but we do get the weak symbol. If the | |
2623 | processor backend uses a COPY reloc, then if some routine in the | |
2624 | dynamic object changes the real symbol, we will not see that | |
2625 | change in the corresponding weak symbol. This is the way other | |
2626 | ELF linkers work as well, and seems to be a result of the shared | |
2627 | library model. | |
2628 | ||
2629 | I will clarify this issue. Most SVR4 shared libraries define the | |
2630 | variable _timezone and define timezone as a weak synonym. The | |
2631 | tzset call changes _timezone. If you write | |
2632 | extern int timezone; | |
2633 | int _timezone = 5; | |
2634 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2635 | you might expect that, since timezone is a synonym for _timezone, | |
2636 | the same number will print both times. However, if the processor | |
2637 | backend uses a COPY reloc, then actually timezone will be copied | |
2638 | into your process image, and, since you define _timezone | |
2639 | yourself, _timezone will not. Thus timezone and _timezone will | |
2640 | wind up at different memory locations. The tzset call will set | |
2641 | _timezone, leaving timezone unchanged. */ | |
2642 | ||
f6e332e6 | 2643 | if (h->u.weakdef != NULL) |
45d6a902 AM |
2644 | { |
2645 | /* If we get to this point, we know there is an implicit | |
2646 | reference by a regular object file via the weak symbol H. | |
2647 | FIXME: Is this really true? What if the traversal finds | |
f6e332e6 AM |
2648 | H->U.WEAKDEF before it finds H? */ |
2649 | h->u.weakdef->ref_regular = 1; | |
45d6a902 | 2650 | |
f6e332e6 | 2651 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2652 | return FALSE; |
2653 | } | |
2654 | ||
2655 | /* If a symbol has no type and no size and does not require a PLT | |
2656 | entry, then we are probably about to do the wrong thing here: we | |
2657 | are probably going to create a COPY reloc for an empty object. | |
2658 | This case can arise when a shared object is built with assembly | |
2659 | code, and the assembly code fails to set the symbol type. */ | |
2660 | if (h->size == 0 | |
2661 | && h->type == STT_NOTYPE | |
f5385ebf | 2662 | && !h->needs_plt) |
45d6a902 AM |
2663 | (*_bfd_error_handler) |
2664 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
2665 | h->root.root.string); | |
2666 | ||
2667 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2668 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2669 | |
45d6a902 AM |
2670 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2671 | { | |
2672 | eif->failed = TRUE; | |
2673 | return FALSE; | |
2674 | } | |
2675 | ||
2676 | return TRUE; | |
2677 | } | |
2678 | ||
027297b7 L |
2679 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2680 | DYNBSS. */ | |
2681 | ||
2682 | bfd_boolean | |
2683 | _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry *h, | |
2684 | asection *dynbss) | |
2685 | { | |
91ac5911 | 2686 | unsigned int power_of_two; |
027297b7 L |
2687 | bfd_vma mask; |
2688 | asection *sec = h->root.u.def.section; | |
2689 | ||
2690 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2691 | requirement of symbols defined in the section. Since we don't |
2692 | know the symbol alignment requirement, we start with the | |
2693 | maximum alignment and check low bits of the symbol address | |
2694 | for the minimum alignment. */ | |
2695 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2696 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2697 | while ((h->root.u.def.value & mask) != 0) | |
2698 | { | |
2699 | mask >>= 1; | |
2700 | --power_of_two; | |
2701 | } | |
027297b7 | 2702 | |
91ac5911 L |
2703 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2704 | dynbss)) | |
027297b7 L |
2705 | { |
2706 | /* Adjust the section alignment if needed. */ | |
2707 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2708 | power_of_two)) |
027297b7 L |
2709 | return FALSE; |
2710 | } | |
2711 | ||
91ac5911 | 2712 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2713 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2714 | ||
2715 | /* Define the symbol as being at this point in DYNBSS. */ | |
2716 | h->root.u.def.section = dynbss; | |
2717 | h->root.u.def.value = dynbss->size; | |
2718 | ||
2719 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2720 | dynbss->size += h->size; | |
2721 | ||
2722 | return TRUE; | |
2723 | } | |
2724 | ||
45d6a902 AM |
2725 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2726 | to reflect the object merging within the sections. */ | |
2727 | ||
28caa186 | 2728 | static bfd_boolean |
268b6b39 | 2729 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2730 | { |
2731 | asection *sec; | |
2732 | ||
2733 | if (h->root.type == bfd_link_hash_warning) | |
2734 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2735 | ||
2736 | if ((h->root.type == bfd_link_hash_defined | |
2737 | || h->root.type == bfd_link_hash_defweak) | |
2738 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
2739 | && sec->sec_info_type == ELF_INFO_TYPE_MERGE) | |
2740 | { | |
a50b1753 | 2741 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2742 | |
2743 | h->root.u.def.value = | |
2744 | _bfd_merged_section_offset (output_bfd, | |
2745 | &h->root.u.def.section, | |
2746 | elf_section_data (sec)->sec_info, | |
753731ee | 2747 | h->root.u.def.value); |
45d6a902 AM |
2748 | } |
2749 | ||
2750 | return TRUE; | |
2751 | } | |
986a241f RH |
2752 | |
2753 | /* Returns false if the symbol referred to by H should be considered | |
2754 | to resolve local to the current module, and true if it should be | |
2755 | considered to bind dynamically. */ | |
2756 | ||
2757 | bfd_boolean | |
268b6b39 AM |
2758 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2759 | struct bfd_link_info *info, | |
89a2ee5a | 2760 | bfd_boolean not_local_protected) |
986a241f RH |
2761 | { |
2762 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2763 | const struct elf_backend_data *bed; |
2764 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2765 | |
2766 | if (h == NULL) | |
2767 | return FALSE; | |
2768 | ||
2769 | while (h->root.type == bfd_link_hash_indirect | |
2770 | || h->root.type == bfd_link_hash_warning) | |
2771 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2772 | ||
2773 | /* If it was forced local, then clearly it's not dynamic. */ | |
2774 | if (h->dynindx == -1) | |
2775 | return FALSE; | |
f5385ebf | 2776 | if (h->forced_local) |
986a241f RH |
2777 | return FALSE; |
2778 | ||
2779 | /* Identify the cases where name binding rules say that a | |
2780 | visible symbol resolves locally. */ | |
55255dae | 2781 | binding_stays_local_p = info->executable || SYMBOLIC_BIND (info, h); |
986a241f RH |
2782 | |
2783 | switch (ELF_ST_VISIBILITY (h->other)) | |
2784 | { | |
2785 | case STV_INTERNAL: | |
2786 | case STV_HIDDEN: | |
2787 | return FALSE; | |
2788 | ||
2789 | case STV_PROTECTED: | |
fcb93ecf PB |
2790 | hash_table = elf_hash_table (info); |
2791 | if (!is_elf_hash_table (hash_table)) | |
2792 | return FALSE; | |
2793 | ||
2794 | bed = get_elf_backend_data (hash_table->dynobj); | |
2795 | ||
986a241f RH |
2796 | /* Proper resolution for function pointer equality may require |
2797 | that these symbols perhaps be resolved dynamically, even though | |
2798 | we should be resolving them to the current module. */ | |
89a2ee5a | 2799 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
2800 | binding_stays_local_p = TRUE; |
2801 | break; | |
2802 | ||
2803 | default: | |
986a241f RH |
2804 | break; |
2805 | } | |
2806 | ||
aa37626c | 2807 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 2808 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
2809 | return TRUE; |
2810 | ||
986a241f RH |
2811 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
2812 | us that it remains local. */ | |
2813 | return !binding_stays_local_p; | |
2814 | } | |
f6c52c13 AM |
2815 | |
2816 | /* Return true if the symbol referred to by H should be considered | |
2817 | to resolve local to the current module, and false otherwise. Differs | |
2818 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 2819 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
2820 | for the place where forced_local and dynindx == -1 are tested. If |
2821 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
2822 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
2823 | the symbol is local only for defined symbols. | |
2824 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
2825 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
2826 | treatment of undefined weak symbols. For those that do not make | |
2827 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
2828 | |
2829 | bfd_boolean | |
268b6b39 AM |
2830 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
2831 | struct bfd_link_info *info, | |
2832 | bfd_boolean local_protected) | |
f6c52c13 | 2833 | { |
fcb93ecf PB |
2834 | const struct elf_backend_data *bed; |
2835 | struct elf_link_hash_table *hash_table; | |
2836 | ||
f6c52c13 AM |
2837 | /* If it's a local sym, of course we resolve locally. */ |
2838 | if (h == NULL) | |
2839 | return TRUE; | |
2840 | ||
d95edcac L |
2841 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
2842 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
2843 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
2844 | return TRUE; | |
2845 | ||
7e2294f9 AO |
2846 | /* Common symbols that become definitions don't get the DEF_REGULAR |
2847 | flag set, so test it first, and don't bail out. */ | |
2848 | if (ELF_COMMON_DEF_P (h)) | |
2849 | /* Do nothing. */; | |
f6c52c13 | 2850 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
2851 | resolve locally. The sym is either undefined or dynamic. */ |
2852 | else if (!h->def_regular) | |
f6c52c13 AM |
2853 | return FALSE; |
2854 | ||
2855 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 2856 | if (h->forced_local) |
f6c52c13 AM |
2857 | return TRUE; |
2858 | ||
2859 | /* As do non-dynamic symbols. */ | |
2860 | if (h->dynindx == -1) | |
2861 | return TRUE; | |
2862 | ||
2863 | /* At this point, we know the symbol is defined and dynamic. In an | |
2864 | executable it must resolve locally, likewise when building symbolic | |
2865 | shared libraries. */ | |
55255dae | 2866 | if (info->executable || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
2867 | return TRUE; |
2868 | ||
2869 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
2870 | with default visibility might not resolve locally. */ | |
2871 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2872 | return FALSE; | |
2873 | ||
fcb93ecf PB |
2874 | hash_table = elf_hash_table (info); |
2875 | if (!is_elf_hash_table (hash_table)) | |
2876 | return TRUE; | |
2877 | ||
2878 | bed = get_elf_backend_data (hash_table->dynobj); | |
2879 | ||
1c16dfa5 | 2880 | /* STV_PROTECTED non-function symbols are local. */ |
fcb93ecf | 2881 | if (!bed->is_function_type (h->type)) |
1c16dfa5 L |
2882 | return TRUE; |
2883 | ||
f6c52c13 | 2884 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
2885 | symbols be treated as dynamic symbols. If the address of a |
2886 | function not defined in an executable is set to that function's | |
2887 | plt entry in the executable, then the address of the function in | |
2888 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
2889 | return local_protected; |
2890 | } | |
e1918d23 AM |
2891 | |
2892 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
2893 | aligned. Returns the first TLS output section. */ | |
2894 | ||
2895 | struct bfd_section * | |
2896 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
2897 | { | |
2898 | struct bfd_section *sec, *tls; | |
2899 | unsigned int align = 0; | |
2900 | ||
2901 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
2902 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
2903 | break; | |
2904 | tls = sec; | |
2905 | ||
2906 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
2907 | if (sec->alignment_power > align) | |
2908 | align = sec->alignment_power; | |
2909 | ||
2910 | elf_hash_table (info)->tls_sec = tls; | |
2911 | ||
2912 | /* Ensure the alignment of the first section is the largest alignment, | |
2913 | so that the tls segment starts aligned. */ | |
2914 | if (tls != NULL) | |
2915 | tls->alignment_power = align; | |
2916 | ||
2917 | return tls; | |
2918 | } | |
0ad989f9 L |
2919 | |
2920 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
2921 | static bfd_boolean | |
2922 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
2923 | Elf_Internal_Sym *sym) | |
2924 | { | |
a4d8e49b L |
2925 | const struct elf_backend_data *bed; |
2926 | ||
0ad989f9 L |
2927 | /* Local symbols do not count, but target specific ones might. */ |
2928 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
2929 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
2930 | return FALSE; | |
2931 | ||
fcb93ecf | 2932 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 2933 | /* Function symbols do not count. */ |
fcb93ecf | 2934 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
2935 | return FALSE; |
2936 | ||
2937 | /* If the section is undefined, then so is the symbol. */ | |
2938 | if (sym->st_shndx == SHN_UNDEF) | |
2939 | return FALSE; | |
2940 | ||
2941 | /* If the symbol is defined in the common section, then | |
2942 | it is a common definition and so does not count. */ | |
a4d8e49b | 2943 | if (bed->common_definition (sym)) |
0ad989f9 L |
2944 | return FALSE; |
2945 | ||
2946 | /* If the symbol is in a target specific section then we | |
2947 | must rely upon the backend to tell us what it is. */ | |
2948 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
2949 | /* FIXME - this function is not coded yet: | |
2950 | ||
2951 | return _bfd_is_global_symbol_definition (abfd, sym); | |
2952 | ||
2953 | Instead for now assume that the definition is not global, | |
2954 | Even if this is wrong, at least the linker will behave | |
2955 | in the same way that it used to do. */ | |
2956 | return FALSE; | |
2957 | ||
2958 | return TRUE; | |
2959 | } | |
2960 | ||
2961 | /* Search the symbol table of the archive element of the archive ABFD | |
2962 | whose archive map contains a mention of SYMDEF, and determine if | |
2963 | the symbol is defined in this element. */ | |
2964 | static bfd_boolean | |
2965 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
2966 | { | |
2967 | Elf_Internal_Shdr * hdr; | |
2968 | bfd_size_type symcount; | |
2969 | bfd_size_type extsymcount; | |
2970 | bfd_size_type extsymoff; | |
2971 | Elf_Internal_Sym *isymbuf; | |
2972 | Elf_Internal_Sym *isym; | |
2973 | Elf_Internal_Sym *isymend; | |
2974 | bfd_boolean result; | |
2975 | ||
2976 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
2977 | if (abfd == NULL) | |
2978 | return FALSE; | |
2979 | ||
2980 | if (! bfd_check_format (abfd, bfd_object)) | |
2981 | return FALSE; | |
2982 | ||
2983 | /* If we have already included the element containing this symbol in the | |
2984 | link then we do not need to include it again. Just claim that any symbol | |
2985 | it contains is not a definition, so that our caller will not decide to | |
2986 | (re)include this element. */ | |
2987 | if (abfd->archive_pass) | |
2988 | return FALSE; | |
2989 | ||
2990 | /* Select the appropriate symbol table. */ | |
2991 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
2992 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
2993 | else | |
2994 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2995 | ||
2996 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
2997 | ||
2998 | /* The sh_info field of the symtab header tells us where the | |
2999 | external symbols start. We don't care about the local symbols. */ | |
3000 | if (elf_bad_symtab (abfd)) | |
3001 | { | |
3002 | extsymcount = symcount; | |
3003 | extsymoff = 0; | |
3004 | } | |
3005 | else | |
3006 | { | |
3007 | extsymcount = symcount - hdr->sh_info; | |
3008 | extsymoff = hdr->sh_info; | |
3009 | } | |
3010 | ||
3011 | if (extsymcount == 0) | |
3012 | return FALSE; | |
3013 | ||
3014 | /* Read in the symbol table. */ | |
3015 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3016 | NULL, NULL, NULL); | |
3017 | if (isymbuf == NULL) | |
3018 | return FALSE; | |
3019 | ||
3020 | /* Scan the symbol table looking for SYMDEF. */ | |
3021 | result = FALSE; | |
3022 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3023 | { | |
3024 | const char *name; | |
3025 | ||
3026 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3027 | isym->st_name); | |
3028 | if (name == NULL) | |
3029 | break; | |
3030 | ||
3031 | if (strcmp (name, symdef->name) == 0) | |
3032 | { | |
3033 | result = is_global_data_symbol_definition (abfd, isym); | |
3034 | break; | |
3035 | } | |
3036 | } | |
3037 | ||
3038 | free (isymbuf); | |
3039 | ||
3040 | return result; | |
3041 | } | |
3042 | \f | |
5a580b3a AM |
3043 | /* Add an entry to the .dynamic table. */ |
3044 | ||
3045 | bfd_boolean | |
3046 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3047 | bfd_vma tag, | |
3048 | bfd_vma val) | |
3049 | { | |
3050 | struct elf_link_hash_table *hash_table; | |
3051 | const struct elf_backend_data *bed; | |
3052 | asection *s; | |
3053 | bfd_size_type newsize; | |
3054 | bfd_byte *newcontents; | |
3055 | Elf_Internal_Dyn dyn; | |
3056 | ||
3057 | hash_table = elf_hash_table (info); | |
3058 | if (! is_elf_hash_table (hash_table)) | |
3059 | return FALSE; | |
3060 | ||
3061 | bed = get_elf_backend_data (hash_table->dynobj); | |
3062 | s = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); | |
3063 | BFD_ASSERT (s != NULL); | |
3064 | ||
eea6121a | 3065 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3066 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3067 | if (newcontents == NULL) |
3068 | return FALSE; | |
3069 | ||
3070 | dyn.d_tag = tag; | |
3071 | dyn.d_un.d_val = val; | |
eea6121a | 3072 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3073 | |
eea6121a | 3074 | s->size = newsize; |
5a580b3a AM |
3075 | s->contents = newcontents; |
3076 | ||
3077 | return TRUE; | |
3078 | } | |
3079 | ||
3080 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3081 | otherwise just check whether one already exists. Returns -1 on error, | |
3082 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3083 | ||
4ad4eba5 | 3084 | static int |
7e9f0867 AM |
3085 | elf_add_dt_needed_tag (bfd *abfd, |
3086 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3087 | const char *soname, |
3088 | bfd_boolean do_it) | |
5a580b3a AM |
3089 | { |
3090 | struct elf_link_hash_table *hash_table; | |
3091 | bfd_size_type oldsize; | |
3092 | bfd_size_type strindex; | |
3093 | ||
7e9f0867 AM |
3094 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3095 | return -1; | |
3096 | ||
5a580b3a AM |
3097 | hash_table = elf_hash_table (info); |
3098 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); | |
3099 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); | |
3100 | if (strindex == (bfd_size_type) -1) | |
3101 | return -1; | |
3102 | ||
3103 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) | |
3104 | { | |
3105 | asection *sdyn; | |
3106 | const struct elf_backend_data *bed; | |
3107 | bfd_byte *extdyn; | |
3108 | ||
3109 | bed = get_elf_backend_data (hash_table->dynobj); | |
3110 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); | |
7e9f0867 AM |
3111 | if (sdyn != NULL) |
3112 | for (extdyn = sdyn->contents; | |
3113 | extdyn < sdyn->contents + sdyn->size; | |
3114 | extdyn += bed->s->sizeof_dyn) | |
3115 | { | |
3116 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3117 | |
7e9f0867 AM |
3118 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3119 | if (dyn.d_tag == DT_NEEDED | |
3120 | && dyn.d_un.d_val == strindex) | |
3121 | { | |
3122 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3123 | return 1; | |
3124 | } | |
3125 | } | |
5a580b3a AM |
3126 | } |
3127 | ||
3128 | if (do_it) | |
3129 | { | |
7e9f0867 AM |
3130 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3131 | return -1; | |
3132 | ||
5a580b3a AM |
3133 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3134 | return -1; | |
3135 | } | |
3136 | else | |
3137 | /* We were just checking for existence of the tag. */ | |
3138 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3139 | ||
3140 | return 0; | |
3141 | } | |
3142 | ||
010e5ae2 AM |
3143 | static bfd_boolean |
3144 | on_needed_list (const char *soname, struct bfd_link_needed_list *needed) | |
3145 | { | |
3146 | for (; needed != NULL; needed = needed->next) | |
3147 | if (strcmp (soname, needed->name) == 0) | |
3148 | return TRUE; | |
3149 | ||
3150 | return FALSE; | |
3151 | } | |
3152 | ||
5a580b3a | 3153 | /* Sort symbol by value and section. */ |
4ad4eba5 AM |
3154 | static int |
3155 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3156 | { |
3157 | const struct elf_link_hash_entry *h1; | |
3158 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3159 | bfd_signed_vma vdiff; |
5a580b3a AM |
3160 | |
3161 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3162 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3163 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3164 | if (vdiff != 0) | |
3165 | return vdiff > 0 ? 1 : -1; | |
3166 | else | |
3167 | { | |
3168 | long sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; | |
3169 | if (sdiff != 0) | |
3170 | return sdiff > 0 ? 1 : -1; | |
3171 | } | |
5a580b3a AM |
3172 | return 0; |
3173 | } | |
4ad4eba5 | 3174 | |
5a580b3a AM |
3175 | /* This function is used to adjust offsets into .dynstr for |
3176 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3177 | ||
3178 | static bfd_boolean | |
3179 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3180 | { | |
a50b1753 | 3181 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a AM |
3182 | |
3183 | if (h->root.type == bfd_link_hash_warning) | |
3184 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3185 | ||
3186 | if (h->dynindx != -1) | |
3187 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3188 | return TRUE; | |
3189 | } | |
3190 | ||
3191 | /* Assign string offsets in .dynstr, update all structures referencing | |
3192 | them. */ | |
3193 | ||
4ad4eba5 AM |
3194 | static bfd_boolean |
3195 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3196 | { |
3197 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3198 | struct elf_link_local_dynamic_entry *entry; | |
3199 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3200 | bfd *dynobj = hash_table->dynobj; | |
3201 | asection *sdyn; | |
3202 | bfd_size_type size; | |
3203 | const struct elf_backend_data *bed; | |
3204 | bfd_byte *extdyn; | |
3205 | ||
3206 | _bfd_elf_strtab_finalize (dynstr); | |
3207 | size = _bfd_elf_strtab_size (dynstr); | |
3208 | ||
3209 | bed = get_elf_backend_data (dynobj); | |
3210 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3211 | BFD_ASSERT (sdyn != NULL); | |
3212 | ||
3213 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3214 | for (extdyn = sdyn->contents; | |
eea6121a | 3215 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3216 | extdyn += bed->s->sizeof_dyn) |
3217 | { | |
3218 | Elf_Internal_Dyn dyn; | |
3219 | ||
3220 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3221 | switch (dyn.d_tag) | |
3222 | { | |
3223 | case DT_STRSZ: | |
3224 | dyn.d_un.d_val = size; | |
3225 | break; | |
3226 | case DT_NEEDED: | |
3227 | case DT_SONAME: | |
3228 | case DT_RPATH: | |
3229 | case DT_RUNPATH: | |
3230 | case DT_FILTER: | |
3231 | case DT_AUXILIARY: | |
7ee314fa AM |
3232 | case DT_AUDIT: |
3233 | case DT_DEPAUDIT: | |
5a580b3a AM |
3234 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3235 | break; | |
3236 | default: | |
3237 | continue; | |
3238 | } | |
3239 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3240 | } | |
3241 | ||
3242 | /* Now update local dynamic symbols. */ | |
3243 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3244 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3245 | entry->isym.st_name); | |
3246 | ||
3247 | /* And the rest of dynamic symbols. */ | |
3248 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3249 | ||
3250 | /* Adjust version definitions. */ | |
3251 | if (elf_tdata (output_bfd)->cverdefs) | |
3252 | { | |
3253 | asection *s; | |
3254 | bfd_byte *p; | |
3255 | bfd_size_type i; | |
3256 | Elf_Internal_Verdef def; | |
3257 | Elf_Internal_Verdaux defaux; | |
3258 | ||
3259 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
3260 | p = s->contents; | |
3261 | do | |
3262 | { | |
3263 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3264 | &def); | |
3265 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3266 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3267 | continue; | |
5a580b3a AM |
3268 | for (i = 0; i < def.vd_cnt; ++i) |
3269 | { | |
3270 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3271 | (Elf_External_Verdaux *) p, &defaux); | |
3272 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3273 | defaux.vda_name); | |
3274 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3275 | &defaux, (Elf_External_Verdaux *) p); | |
3276 | p += sizeof (Elf_External_Verdaux); | |
3277 | } | |
3278 | } | |
3279 | while (def.vd_next); | |
3280 | } | |
3281 | ||
3282 | /* Adjust version references. */ | |
3283 | if (elf_tdata (output_bfd)->verref) | |
3284 | { | |
3285 | asection *s; | |
3286 | bfd_byte *p; | |
3287 | bfd_size_type i; | |
3288 | Elf_Internal_Verneed need; | |
3289 | Elf_Internal_Vernaux needaux; | |
3290 | ||
3291 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
3292 | p = s->contents; | |
3293 | do | |
3294 | { | |
3295 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3296 | &need); | |
3297 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3298 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3299 | (Elf_External_Verneed *) p); | |
3300 | p += sizeof (Elf_External_Verneed); | |
3301 | for (i = 0; i < need.vn_cnt; ++i) | |
3302 | { | |
3303 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3304 | (Elf_External_Vernaux *) p, &needaux); | |
3305 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3306 | needaux.vna_name); | |
3307 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3308 | &needaux, | |
3309 | (Elf_External_Vernaux *) p); | |
3310 | p += sizeof (Elf_External_Vernaux); | |
3311 | } | |
3312 | } | |
3313 | while (need.vn_next); | |
3314 | } | |
3315 | ||
3316 | return TRUE; | |
3317 | } | |
3318 | \f | |
13285a1b AM |
3319 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3320 | The default is to only match when the INPUT and OUTPUT are exactly | |
3321 | the same target. */ | |
3322 | ||
3323 | bfd_boolean | |
3324 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3325 | const bfd_target *output) | |
3326 | { | |
3327 | return input == output; | |
3328 | } | |
3329 | ||
3330 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3331 | This version is used when different targets for the same architecture | |
3332 | are virtually identical. */ | |
3333 | ||
3334 | bfd_boolean | |
3335 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3336 | const bfd_target *output) | |
3337 | { | |
3338 | const struct elf_backend_data *obed, *ibed; | |
3339 | ||
3340 | if (input == output) | |
3341 | return TRUE; | |
3342 | ||
3343 | ibed = xvec_get_elf_backend_data (input); | |
3344 | obed = xvec_get_elf_backend_data (output); | |
3345 | ||
3346 | if (ibed->arch != obed->arch) | |
3347 | return FALSE; | |
3348 | ||
3349 | /* If both backends are using this function, deem them compatible. */ | |
3350 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3351 | } | |
3352 | ||
4ad4eba5 AM |
3353 | /* Add symbols from an ELF object file to the linker hash table. */ |
3354 | ||
3355 | static bfd_boolean | |
3356 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3357 | { | |
a0c402a5 | 3358 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 AM |
3359 | Elf_Internal_Shdr *hdr; |
3360 | bfd_size_type symcount; | |
3361 | bfd_size_type extsymcount; | |
3362 | bfd_size_type extsymoff; | |
3363 | struct elf_link_hash_entry **sym_hash; | |
3364 | bfd_boolean dynamic; | |
3365 | Elf_External_Versym *extversym = NULL; | |
3366 | Elf_External_Versym *ever; | |
3367 | struct elf_link_hash_entry *weaks; | |
3368 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
3369 | bfd_size_type nondeflt_vers_cnt = 0; | |
3370 | Elf_Internal_Sym *isymbuf = NULL; | |
3371 | Elf_Internal_Sym *isym; | |
3372 | Elf_Internal_Sym *isymend; | |
3373 | const struct elf_backend_data *bed; | |
3374 | bfd_boolean add_needed; | |
66eb6687 | 3375 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3376 | bfd_size_type amt; |
66eb6687 | 3377 | void *alloc_mark = NULL; |
4f87808c AM |
3378 | struct bfd_hash_entry **old_table = NULL; |
3379 | unsigned int old_size = 0; | |
3380 | unsigned int old_count = 0; | |
66eb6687 AM |
3381 | void *old_tab = NULL; |
3382 | void *old_hash; | |
3383 | void *old_ent; | |
3384 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3385 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
3386 | long old_dynsymcount = 0; | |
3387 | size_t tabsize = 0; | |
3388 | size_t hashsize = 0; | |
4ad4eba5 | 3389 | |
66eb6687 | 3390 | htab = elf_hash_table (info); |
4ad4eba5 | 3391 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3392 | |
3393 | if ((abfd->flags & DYNAMIC) == 0) | |
3394 | dynamic = FALSE; | |
3395 | else | |
3396 | { | |
3397 | dynamic = TRUE; | |
3398 | ||
3399 | /* You can't use -r against a dynamic object. Also, there's no | |
3400 | hope of using a dynamic object which does not exactly match | |
3401 | the format of the output file. */ | |
3402 | if (info->relocatable | |
66eb6687 | 3403 | || !is_elf_hash_table (htab) |
f13a99db | 3404 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3405 | { |
9a0789ec NC |
3406 | if (info->relocatable) |
3407 | bfd_set_error (bfd_error_invalid_operation); | |
3408 | else | |
3409 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3410 | goto error_return; |
3411 | } | |
3412 | } | |
3413 | ||
a0c402a5 L |
3414 | ehdr = elf_elfheader (abfd); |
3415 | if (info->warn_alternate_em | |
3416 | && bed->elf_machine_code != ehdr->e_machine | |
3417 | && ((bed->elf_machine_alt1 != 0 | |
3418 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3419 | || (bed->elf_machine_alt2 != 0 | |
3420 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3421 | info->callbacks->einfo | |
3422 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), | |
3423 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3424 | ||
4ad4eba5 AM |
3425 | /* As a GNU extension, any input sections which are named |
3426 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3427 | symbol. This differs from .gnu.warning sections, which generate | |
3428 | warnings when they are included in an output file. */ | |
dd98f8d2 NC |
3429 | /* PR 12761: Also generate this warning when building shared libraries. */ |
3430 | if (info->executable || info->shared) | |
4ad4eba5 AM |
3431 | { |
3432 | asection *s; | |
3433 | ||
3434 | for (s = abfd->sections; s != NULL; s = s->next) | |
3435 | { | |
3436 | const char *name; | |
3437 | ||
3438 | name = bfd_get_section_name (abfd, s); | |
0112cd26 | 3439 | if (CONST_STRNEQ (name, ".gnu.warning.")) |
4ad4eba5 AM |
3440 | { |
3441 | char *msg; | |
3442 | bfd_size_type sz; | |
4ad4eba5 AM |
3443 | |
3444 | name += sizeof ".gnu.warning." - 1; | |
3445 | ||
3446 | /* If this is a shared object, then look up the symbol | |
3447 | in the hash table. If it is there, and it is already | |
3448 | been defined, then we will not be using the entry | |
3449 | from this shared object, so we don't need to warn. | |
3450 | FIXME: If we see the definition in a regular object | |
3451 | later on, we will warn, but we shouldn't. The only | |
3452 | fix is to keep track of what warnings we are supposed | |
3453 | to emit, and then handle them all at the end of the | |
3454 | link. */ | |
3455 | if (dynamic) | |
3456 | { | |
3457 | struct elf_link_hash_entry *h; | |
3458 | ||
66eb6687 | 3459 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); |
4ad4eba5 AM |
3460 | |
3461 | /* FIXME: What about bfd_link_hash_common? */ | |
3462 | if (h != NULL | |
3463 | && (h->root.type == bfd_link_hash_defined | |
3464 | || h->root.type == bfd_link_hash_defweak)) | |
3465 | { | |
3466 | /* We don't want to issue this warning. Clobber | |
3467 | the section size so that the warning does not | |
3468 | get copied into the output file. */ | |
eea6121a | 3469 | s->size = 0; |
4ad4eba5 AM |
3470 | continue; |
3471 | } | |
3472 | } | |
3473 | ||
eea6121a | 3474 | sz = s->size; |
a50b1753 | 3475 | msg = (char *) bfd_alloc (abfd, sz + 1); |
4ad4eba5 AM |
3476 | if (msg == NULL) |
3477 | goto error_return; | |
3478 | ||
370a0e1b | 3479 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
4ad4eba5 AM |
3480 | goto error_return; |
3481 | ||
370a0e1b | 3482 | msg[sz] = '\0'; |
4ad4eba5 AM |
3483 | |
3484 | if (! (_bfd_generic_link_add_one_symbol | |
3485 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
66eb6687 | 3486 | FALSE, bed->collect, NULL))) |
4ad4eba5 AM |
3487 | goto error_return; |
3488 | ||
3489 | if (! info->relocatable) | |
3490 | { | |
3491 | /* Clobber the section size so that the warning does | |
3492 | not get copied into the output file. */ | |
eea6121a | 3493 | s->size = 0; |
11d2f718 AM |
3494 | |
3495 | /* Also set SEC_EXCLUDE, so that symbols defined in | |
3496 | the warning section don't get copied to the output. */ | |
3497 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3498 | } |
3499 | } | |
3500 | } | |
3501 | } | |
3502 | ||
3503 | add_needed = TRUE; | |
3504 | if (! dynamic) | |
3505 | { | |
3506 | /* If we are creating a shared library, create all the dynamic | |
3507 | sections immediately. We need to attach them to something, | |
3508 | so we attach them to this BFD, provided it is the right | |
3509 | format. FIXME: If there are no input BFD's of the same | |
3510 | format as the output, we can't make a shared library. */ | |
3511 | if (info->shared | |
66eb6687 | 3512 | && is_elf_hash_table (htab) |
f13a99db | 3513 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3514 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3515 | { |
3516 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3517 | goto error_return; | |
3518 | } | |
3519 | } | |
66eb6687 | 3520 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3521 | goto error_return; |
3522 | else | |
3523 | { | |
3524 | asection *s; | |
3525 | const char *soname = NULL; | |
7ee314fa | 3526 | char *audit = NULL; |
4ad4eba5 AM |
3527 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
3528 | int ret; | |
3529 | ||
3530 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3531 | ld shouldn't allow it. */ |
4ad4eba5 AM |
3532 | if ((s = abfd->sections) != NULL |
3533 | && s->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) | |
92fd189d | 3534 | abort (); |
4ad4eba5 AM |
3535 | |
3536 | /* If this dynamic lib was specified on the command line with | |
3537 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3538 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3539 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3540 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3541 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3542 | all. */ | |
3543 | add_needed = (elf_dyn_lib_class (abfd) | |
3544 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3545 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3546 | |
3547 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3548 | if (s != NULL) | |
3549 | { | |
3550 | bfd_byte *dynbuf; | |
3551 | bfd_byte *extdyn; | |
cb33740c | 3552 | unsigned int elfsec; |
4ad4eba5 AM |
3553 | unsigned long shlink; |
3554 | ||
eea6121a | 3555 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3556 | { |
3557 | error_free_dyn: | |
3558 | free (dynbuf); | |
3559 | goto error_return; | |
3560 | } | |
4ad4eba5 AM |
3561 | |
3562 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3563 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3564 | goto error_free_dyn; |
3565 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3566 | ||
3567 | for (extdyn = dynbuf; | |
eea6121a | 3568 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3569 | extdyn += bed->s->sizeof_dyn) |
3570 | { | |
3571 | Elf_Internal_Dyn dyn; | |
3572 | ||
3573 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3574 | if (dyn.d_tag == DT_SONAME) | |
3575 | { | |
3576 | unsigned int tagv = dyn.d_un.d_val; | |
3577 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3578 | if (soname == NULL) | |
3579 | goto error_free_dyn; | |
3580 | } | |
3581 | if (dyn.d_tag == DT_NEEDED) | |
3582 | { | |
3583 | struct bfd_link_needed_list *n, **pn; | |
3584 | char *fnm, *anm; | |
3585 | unsigned int tagv = dyn.d_un.d_val; | |
3586 | ||
3587 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3588 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3589 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3590 | if (n == NULL || fnm == NULL) | |
3591 | goto error_free_dyn; | |
3592 | amt = strlen (fnm) + 1; | |
a50b1753 | 3593 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3594 | if (anm == NULL) |
3595 | goto error_free_dyn; | |
3596 | memcpy (anm, fnm, amt); | |
3597 | n->name = anm; | |
3598 | n->by = abfd; | |
3599 | n->next = NULL; | |
66eb6687 | 3600 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3601 | ; |
3602 | *pn = n; | |
3603 | } | |
3604 | if (dyn.d_tag == DT_RUNPATH) | |
3605 | { | |
3606 | struct bfd_link_needed_list *n, **pn; | |
3607 | char *fnm, *anm; | |
3608 | unsigned int tagv = dyn.d_un.d_val; | |
3609 | ||
3610 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3611 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3612 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3613 | if (n == NULL || fnm == NULL) | |
3614 | goto error_free_dyn; | |
3615 | amt = strlen (fnm) + 1; | |
a50b1753 | 3616 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3617 | if (anm == NULL) |
3618 | goto error_free_dyn; | |
3619 | memcpy (anm, fnm, amt); | |
3620 | n->name = anm; | |
3621 | n->by = abfd; | |
3622 | n->next = NULL; | |
3623 | for (pn = & runpath; | |
3624 | *pn != NULL; | |
3625 | pn = &(*pn)->next) | |
3626 | ; | |
3627 | *pn = n; | |
3628 | } | |
3629 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3630 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3631 | { | |
3632 | struct bfd_link_needed_list *n, **pn; | |
3633 | char *fnm, *anm; | |
3634 | unsigned int tagv = dyn.d_un.d_val; | |
3635 | ||
3636 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3637 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3638 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3639 | if (n == NULL || fnm == NULL) | |
3640 | goto error_free_dyn; | |
3641 | amt = strlen (fnm) + 1; | |
a50b1753 | 3642 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3643 | if (anm == NULL) |
f8703194 | 3644 | goto error_free_dyn; |
4ad4eba5 AM |
3645 | memcpy (anm, fnm, amt); |
3646 | n->name = anm; | |
3647 | n->by = abfd; | |
3648 | n->next = NULL; | |
3649 | for (pn = & rpath; | |
3650 | *pn != NULL; | |
3651 | pn = &(*pn)->next) | |
3652 | ; | |
3653 | *pn = n; | |
3654 | } | |
7ee314fa AM |
3655 | if (dyn.d_tag == DT_AUDIT) |
3656 | { | |
3657 | unsigned int tagv = dyn.d_un.d_val; | |
3658 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3659 | } | |
4ad4eba5 AM |
3660 | } |
3661 | ||
3662 | free (dynbuf); | |
3663 | } | |
3664 | ||
3665 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3666 | frees all more recently bfd_alloc'd blocks as well. */ | |
3667 | if (runpath) | |
3668 | rpath = runpath; | |
3669 | ||
3670 | if (rpath) | |
3671 | { | |
3672 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3673 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3674 | ; |
3675 | *pn = rpath; | |
3676 | } | |
3677 | ||
3678 | /* We do not want to include any of the sections in a dynamic | |
3679 | object in the output file. We hack by simply clobbering the | |
3680 | list of sections in the BFD. This could be handled more | |
3681 | cleanly by, say, a new section flag; the existing | |
3682 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3683 | still implies that the section takes up space in the output | |
3684 | file. */ | |
3685 | bfd_section_list_clear (abfd); | |
3686 | ||
4ad4eba5 AM |
3687 | /* Find the name to use in a DT_NEEDED entry that refers to this |
3688 | object. If the object has a DT_SONAME entry, we use it. | |
3689 | Otherwise, if the generic linker stuck something in | |
3690 | elf_dt_name, we use that. Otherwise, we just use the file | |
3691 | name. */ | |
3692 | if (soname == NULL || *soname == '\0') | |
3693 | { | |
3694 | soname = elf_dt_name (abfd); | |
3695 | if (soname == NULL || *soname == '\0') | |
3696 | soname = bfd_get_filename (abfd); | |
3697 | } | |
3698 | ||
3699 | /* Save the SONAME because sometimes the linker emulation code | |
3700 | will need to know it. */ | |
3701 | elf_dt_name (abfd) = soname; | |
3702 | ||
7e9f0867 | 3703 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
3704 | if (ret < 0) |
3705 | goto error_return; | |
3706 | ||
3707 | /* If we have already included this dynamic object in the | |
3708 | link, just ignore it. There is no reason to include a | |
3709 | particular dynamic object more than once. */ | |
3710 | if (ret > 0) | |
3711 | return TRUE; | |
7ee314fa AM |
3712 | |
3713 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
3714 | elf_dt_audit (abfd) = audit; | |
4ad4eba5 AM |
3715 | } |
3716 | ||
3717 | /* If this is a dynamic object, we always link against the .dynsym | |
3718 | symbol table, not the .symtab symbol table. The dynamic linker | |
3719 | will only see the .dynsym symbol table, so there is no reason to | |
3720 | look at .symtab for a dynamic object. */ | |
3721 | ||
3722 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
3723 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3724 | else | |
3725 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3726 | ||
3727 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
3728 | ||
3729 | /* The sh_info field of the symtab header tells us where the | |
3730 | external symbols start. We don't care about the local symbols at | |
3731 | this point. */ | |
3732 | if (elf_bad_symtab (abfd)) | |
3733 | { | |
3734 | extsymcount = symcount; | |
3735 | extsymoff = 0; | |
3736 | } | |
3737 | else | |
3738 | { | |
3739 | extsymcount = symcount - hdr->sh_info; | |
3740 | extsymoff = hdr->sh_info; | |
3741 | } | |
3742 | ||
3743 | sym_hash = NULL; | |
3744 | if (extsymcount != 0) | |
3745 | { | |
3746 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3747 | NULL, NULL, NULL); | |
3748 | if (isymbuf == NULL) | |
3749 | goto error_return; | |
3750 | ||
3751 | /* We store a pointer to the hash table entry for each external | |
3752 | symbol. */ | |
3753 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 3754 | sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3755 | if (sym_hash == NULL) |
3756 | goto error_free_sym; | |
3757 | elf_sym_hashes (abfd) = sym_hash; | |
3758 | } | |
3759 | ||
3760 | if (dynamic) | |
3761 | { | |
3762 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
3763 | if (!_bfd_elf_slurp_version_tables (abfd, |
3764 | info->default_imported_symver)) | |
4ad4eba5 AM |
3765 | goto error_free_sym; |
3766 | ||
3767 | /* Read in the symbol versions, but don't bother to convert them | |
3768 | to internal format. */ | |
3769 | if (elf_dynversym (abfd) != 0) | |
3770 | { | |
3771 | Elf_Internal_Shdr *versymhdr; | |
3772 | ||
3773 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 3774 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
3775 | if (extversym == NULL) |
3776 | goto error_free_sym; | |
3777 | amt = versymhdr->sh_size; | |
3778 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
3779 | || bfd_bread (extversym, amt, abfd) != amt) | |
3780 | goto error_free_vers; | |
3781 | } | |
3782 | } | |
3783 | ||
66eb6687 AM |
3784 | /* If we are loading an as-needed shared lib, save the symbol table |
3785 | state before we start adding symbols. If the lib turns out | |
3786 | to be unneeded, restore the state. */ | |
3787 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
3788 | { | |
3789 | unsigned int i; | |
3790 | size_t entsize; | |
3791 | ||
3792 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
3793 | { | |
3794 | struct bfd_hash_entry *p; | |
2de92251 | 3795 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3796 | |
3797 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
3798 | { |
3799 | h = (struct elf_link_hash_entry *) p; | |
3800 | entsize += htab->root.table.entsize; | |
3801 | if (h->root.type == bfd_link_hash_warning) | |
3802 | entsize += htab->root.table.entsize; | |
3803 | } | |
66eb6687 AM |
3804 | } |
3805 | ||
3806 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
3807 | hashsize = extsymcount * sizeof (struct elf_link_hash_entry *); | |
3808 | old_tab = bfd_malloc (tabsize + entsize + hashsize); | |
3809 | if (old_tab == NULL) | |
3810 | goto error_free_vers; | |
3811 | ||
3812 | /* Remember the current objalloc pointer, so that all mem for | |
3813 | symbols added can later be reclaimed. */ | |
3814 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
3815 | if (alloc_mark == NULL) | |
3816 | goto error_free_vers; | |
3817 | ||
5061a885 AM |
3818 | /* Make a special call to the linker "notice" function to |
3819 | tell it that we are about to handle an as-needed lib. */ | |
3820 | if (!(*info->callbacks->notice) (info, NULL, abfd, NULL, | |
16d96b5b | 3821 | notice_as_needed, 0, NULL)) |
9af2a943 | 3822 | goto error_free_vers; |
5061a885 | 3823 | |
66eb6687 AM |
3824 | /* Clone the symbol table and sym hashes. Remember some |
3825 | pointers into the symbol table, and dynamic symbol count. */ | |
3826 | old_hash = (char *) old_tab + tabsize; | |
3827 | old_ent = (char *) old_hash + hashsize; | |
3828 | memcpy (old_tab, htab->root.table.table, tabsize); | |
3829 | memcpy (old_hash, sym_hash, hashsize); | |
3830 | old_undefs = htab->root.undefs; | |
3831 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
3832 | old_table = htab->root.table.table; |
3833 | old_size = htab->root.table.size; | |
3834 | old_count = htab->root.table.count; | |
66eb6687 AM |
3835 | old_dynsymcount = htab->dynsymcount; |
3836 | ||
3837 | for (i = 0; i < htab->root.table.size; i++) | |
3838 | { | |
3839 | struct bfd_hash_entry *p; | |
2de92251 | 3840 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3841 | |
3842 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
3843 | { | |
3844 | memcpy (old_ent, p, htab->root.table.entsize); | |
3845 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
3846 | h = (struct elf_link_hash_entry *) p; |
3847 | if (h->root.type == bfd_link_hash_warning) | |
3848 | { | |
3849 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
3850 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
3851 | } | |
66eb6687 AM |
3852 | } |
3853 | } | |
3854 | } | |
4ad4eba5 | 3855 | |
66eb6687 | 3856 | weaks = NULL; |
4ad4eba5 AM |
3857 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
3858 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
3859 | isym < isymend; | |
3860 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
3861 | { | |
3862 | int bind; | |
3863 | bfd_vma value; | |
af44c138 | 3864 | asection *sec, *new_sec; |
4ad4eba5 AM |
3865 | flagword flags; |
3866 | const char *name; | |
3867 | struct elf_link_hash_entry *h; | |
3868 | bfd_boolean definition; | |
3869 | bfd_boolean size_change_ok; | |
3870 | bfd_boolean type_change_ok; | |
3871 | bfd_boolean new_weakdef; | |
3872 | bfd_boolean override; | |
a4d8e49b | 3873 | bfd_boolean common; |
4ad4eba5 AM |
3874 | unsigned int old_alignment; |
3875 | bfd *old_bfd; | |
3cbc5de0 | 3876 | bfd * undef_bfd = NULL; |
4ad4eba5 AM |
3877 | |
3878 | override = FALSE; | |
3879 | ||
3880 | flags = BSF_NO_FLAGS; | |
3881 | sec = NULL; | |
3882 | value = isym->st_value; | |
3883 | *sym_hash = NULL; | |
a4d8e49b | 3884 | common = bed->common_definition (isym); |
4ad4eba5 AM |
3885 | |
3886 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 3887 | switch (bind) |
4ad4eba5 | 3888 | { |
3e7a7d11 | 3889 | case STB_LOCAL: |
4ad4eba5 AM |
3890 | /* This should be impossible, since ELF requires that all |
3891 | global symbols follow all local symbols, and that sh_info | |
3892 | point to the first global symbol. Unfortunately, Irix 5 | |
3893 | screws this up. */ | |
3894 | continue; | |
3e7a7d11 NC |
3895 | |
3896 | case STB_GLOBAL: | |
a4d8e49b | 3897 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 3898 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
3899 | break; |
3900 | ||
3901 | case STB_WEAK: | |
3902 | flags = BSF_WEAK; | |
3903 | break; | |
3904 | ||
3905 | case STB_GNU_UNIQUE: | |
3906 | flags = BSF_GNU_UNIQUE; | |
3907 | break; | |
3908 | ||
3909 | default: | |
4ad4eba5 | 3910 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 3911 | break; |
4ad4eba5 AM |
3912 | } |
3913 | ||
3914 | if (isym->st_shndx == SHN_UNDEF) | |
3915 | sec = bfd_und_section_ptr; | |
cb33740c AM |
3916 | else if (isym->st_shndx == SHN_ABS) |
3917 | sec = bfd_abs_section_ptr; | |
3918 | else if (isym->st_shndx == SHN_COMMON) | |
3919 | { | |
3920 | sec = bfd_com_section_ptr; | |
3921 | /* What ELF calls the size we call the value. What ELF | |
3922 | calls the value we call the alignment. */ | |
3923 | value = isym->st_size; | |
3924 | } | |
3925 | else | |
4ad4eba5 AM |
3926 | { |
3927 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3928 | if (sec == NULL) | |
3929 | sec = bfd_abs_section_ptr; | |
529fcb95 PB |
3930 | else if (sec->kept_section) |
3931 | { | |
e5d08002 L |
3932 | /* Symbols from discarded section are undefined. We keep |
3933 | its visibility. */ | |
529fcb95 PB |
3934 | sec = bfd_und_section_ptr; |
3935 | isym->st_shndx = SHN_UNDEF; | |
3936 | } | |
4ad4eba5 AM |
3937 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
3938 | value -= sec->vma; | |
3939 | } | |
4ad4eba5 AM |
3940 | |
3941 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3942 | isym->st_name); | |
3943 | if (name == NULL) | |
3944 | goto error_free_vers; | |
3945 | ||
3946 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
3947 | && (abfd->flags & BFD_PLUGIN) != 0) |
3948 | { | |
3949 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
3950 | ||
3951 | if (xc == NULL) | |
3952 | { | |
3953 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
3954 | | SEC_EXCLUDE); | |
3955 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
3956 | if (xc == NULL) | |
3957 | goto error_free_vers; | |
3958 | } | |
3959 | sec = xc; | |
3960 | } | |
3961 | else if (isym->st_shndx == SHN_COMMON | |
3962 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
3963 | && !info->relocatable) | |
4ad4eba5 AM |
3964 | { |
3965 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
3966 | ||
3967 | if (tcomm == NULL) | |
3968 | { | |
02d00247 AM |
3969 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
3970 | | SEC_LINKER_CREATED); | |
3971 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 3972 | if (tcomm == NULL) |
4ad4eba5 AM |
3973 | goto error_free_vers; |
3974 | } | |
3975 | sec = tcomm; | |
3976 | } | |
66eb6687 | 3977 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 3978 | { |
66eb6687 AM |
3979 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
3980 | &sec, &value)) | |
4ad4eba5 AM |
3981 | goto error_free_vers; |
3982 | ||
3983 | /* The hook function sets the name to NULL if this symbol | |
3984 | should be skipped for some reason. */ | |
3985 | if (name == NULL) | |
3986 | continue; | |
3987 | } | |
3988 | ||
3989 | /* Sanity check that all possibilities were handled. */ | |
3990 | if (sec == NULL) | |
3991 | { | |
3992 | bfd_set_error (bfd_error_bad_value); | |
3993 | goto error_free_vers; | |
3994 | } | |
3995 | ||
3996 | if (bfd_is_und_section (sec) | |
3997 | || bfd_is_com_section (sec)) | |
3998 | definition = FALSE; | |
3999 | else | |
4000 | definition = TRUE; | |
4001 | ||
4002 | size_change_ok = FALSE; | |
66eb6687 | 4003 | type_change_ok = bed->type_change_ok; |
4ad4eba5 AM |
4004 | old_alignment = 0; |
4005 | old_bfd = NULL; | |
af44c138 | 4006 | new_sec = sec; |
4ad4eba5 | 4007 | |
66eb6687 | 4008 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4009 | { |
4010 | Elf_Internal_Versym iver; | |
4011 | unsigned int vernum = 0; | |
4012 | bfd_boolean skip; | |
4013 | ||
b918acf9 NC |
4014 | /* If this is a definition of a symbol which was previously |
4015 | referenced in a non-weak manner then make a note of the bfd | |
4016 | that contained the reference. This is used if we need to | |
4017 | refer to the source of the reference later on. */ | |
4018 | if (! bfd_is_und_section (sec)) | |
4019 | { | |
4020 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
4021 | ||
4022 | if (h != NULL | |
4023 | && h->root.type == bfd_link_hash_undefined | |
4024 | && h->root.u.undef.abfd) | |
4025 | undef_bfd = h->root.u.undef.abfd; | |
4026 | } | |
4027 | ||
fc0e6df6 | 4028 | if (ever == NULL) |
4ad4eba5 | 4029 | { |
fc0e6df6 PB |
4030 | if (info->default_imported_symver) |
4031 | /* Use the default symbol version created earlier. */ | |
4032 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4033 | else | |
4034 | iver.vs_vers = 0; | |
4035 | } | |
4036 | else | |
4037 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4038 | ||
4039 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4040 | ||
4041 | /* If this is a hidden symbol, or if it is not version | |
4042 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4043 | However, we do not modify a non-hidden absolute symbol |
4044 | if it is not a function, because it might be the version | |
4045 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4046 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4047 | || (vernum > 1 |
4048 | && (!bfd_is_abs_section (sec) | |
4049 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4050 | { |
4051 | const char *verstr; | |
4052 | size_t namelen, verlen, newlen; | |
4053 | char *newname, *p; | |
4054 | ||
4055 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4056 | { |
fc0e6df6 PB |
4057 | if (vernum > elf_tdata (abfd)->cverdefs) |
4058 | verstr = NULL; | |
4059 | else if (vernum > 1) | |
4060 | verstr = | |
4061 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4062 | else | |
4063 | verstr = ""; | |
4ad4eba5 | 4064 | |
fc0e6df6 | 4065 | if (verstr == NULL) |
4ad4eba5 | 4066 | { |
fc0e6df6 PB |
4067 | (*_bfd_error_handler) |
4068 | (_("%B: %s: invalid version %u (max %d)"), | |
4069 | abfd, name, vernum, | |
4070 | elf_tdata (abfd)->cverdefs); | |
4071 | bfd_set_error (bfd_error_bad_value); | |
4072 | goto error_free_vers; | |
4ad4eba5 | 4073 | } |
fc0e6df6 PB |
4074 | } |
4075 | else | |
4076 | { | |
4077 | /* We cannot simply test for the number of | |
4078 | entries in the VERNEED section since the | |
4079 | numbers for the needed versions do not start | |
4080 | at 0. */ | |
4081 | Elf_Internal_Verneed *t; | |
4082 | ||
4083 | verstr = NULL; | |
4084 | for (t = elf_tdata (abfd)->verref; | |
4085 | t != NULL; | |
4086 | t = t->vn_nextref) | |
4ad4eba5 | 4087 | { |
fc0e6df6 | 4088 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4089 | |
fc0e6df6 PB |
4090 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4091 | { | |
4092 | if (a->vna_other == vernum) | |
4ad4eba5 | 4093 | { |
fc0e6df6 PB |
4094 | verstr = a->vna_nodename; |
4095 | break; | |
4ad4eba5 | 4096 | } |
4ad4eba5 | 4097 | } |
fc0e6df6 PB |
4098 | if (a != NULL) |
4099 | break; | |
4100 | } | |
4101 | if (verstr == NULL) | |
4102 | { | |
4103 | (*_bfd_error_handler) | |
4104 | (_("%B: %s: invalid needed version %d"), | |
4105 | abfd, name, vernum); | |
4106 | bfd_set_error (bfd_error_bad_value); | |
4107 | goto error_free_vers; | |
4ad4eba5 | 4108 | } |
4ad4eba5 | 4109 | } |
fc0e6df6 PB |
4110 | |
4111 | namelen = strlen (name); | |
4112 | verlen = strlen (verstr); | |
4113 | newlen = namelen + verlen + 2; | |
4114 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4115 | && isym->st_shndx != SHN_UNDEF) | |
4116 | ++newlen; | |
4117 | ||
a50b1753 | 4118 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4119 | if (newname == NULL) |
4120 | goto error_free_vers; | |
4121 | memcpy (newname, name, namelen); | |
4122 | p = newname + namelen; | |
4123 | *p++ = ELF_VER_CHR; | |
4124 | /* If this is a defined non-hidden version symbol, | |
4125 | we add another @ to the name. This indicates the | |
4126 | default version of the symbol. */ | |
4127 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4128 | && isym->st_shndx != SHN_UNDEF) | |
4129 | *p++ = ELF_VER_CHR; | |
4130 | memcpy (p, verstr, verlen + 1); | |
4131 | ||
4132 | name = newname; | |
4ad4eba5 AM |
4133 | } |
4134 | ||
b918acf9 NC |
4135 | /* If necessary, make a second attempt to locate the bfd |
4136 | containing an unresolved, non-weak reference to the | |
4137 | current symbol. */ | |
4138 | if (! bfd_is_und_section (sec) && undef_bfd == NULL) | |
3cbc5de0 NC |
4139 | { |
4140 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
4141 | ||
4142 | if (h != NULL | |
b918acf9 | 4143 | && h->root.type == bfd_link_hash_undefined |
3cbc5de0 NC |
4144 | && h->root.u.undef.abfd) |
4145 | undef_bfd = h->root.u.undef.abfd; | |
4146 | } | |
4147 | ||
af44c138 L |
4148 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, |
4149 | &value, &old_alignment, | |
4ad4eba5 AM |
4150 | sym_hash, &skip, &override, |
4151 | &type_change_ok, &size_change_ok)) | |
4152 | goto error_free_vers; | |
4153 | ||
4154 | if (skip) | |
4155 | continue; | |
4156 | ||
4157 | if (override) | |
4158 | definition = FALSE; | |
4159 | ||
4160 | h = *sym_hash; | |
4161 | while (h->root.type == bfd_link_hash_indirect | |
4162 | || h->root.type == bfd_link_hash_warning) | |
4163 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4164 | ||
4165 | /* Remember the old alignment if this is a common symbol, so | |
4166 | that we don't reduce the alignment later on. We can't | |
4167 | check later, because _bfd_generic_link_add_one_symbol | |
4168 | will set a default for the alignment which we want to | |
4169 | override. We also remember the old bfd where the existing | |
4170 | definition comes from. */ | |
4171 | switch (h->root.type) | |
4172 | { | |
4173 | default: | |
4174 | break; | |
4175 | ||
4176 | case bfd_link_hash_defined: | |
4177 | case bfd_link_hash_defweak: | |
4178 | old_bfd = h->root.u.def.section->owner; | |
4179 | break; | |
4180 | ||
4181 | case bfd_link_hash_common: | |
4182 | old_bfd = h->root.u.c.p->section->owner; | |
4183 | old_alignment = h->root.u.c.p->alignment_power; | |
4184 | break; | |
4185 | } | |
4186 | ||
4187 | if (elf_tdata (abfd)->verdef != NULL | |
4188 | && ! override | |
4189 | && vernum > 1 | |
4190 | && definition) | |
4191 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4192 | } | |
4193 | ||
4194 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4195 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4196 | (struct bfd_link_hash_entry **) sym_hash))) |
4197 | goto error_free_vers; | |
4198 | ||
4199 | h = *sym_hash; | |
4200 | while (h->root.type == bfd_link_hash_indirect | |
4201 | || h->root.type == bfd_link_hash_warning) | |
4202 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4203 | |
4ad4eba5 | 4204 | *sym_hash = h; |
d64284fe L |
4205 | if (is_elf_hash_table (htab)) |
4206 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4ad4eba5 AM |
4207 | |
4208 | new_weakdef = FALSE; | |
4209 | if (dynamic | |
4210 | && definition | |
4211 | && (flags & BSF_WEAK) != 0 | |
fcb93ecf | 4212 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4213 | && is_elf_hash_table (htab) |
f6e332e6 | 4214 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4215 | { |
4216 | /* Keep a list of all weak defined non function symbols from | |
4217 | a dynamic object, using the weakdef field. Later in this | |
4218 | function we will set the weakdef field to the correct | |
4219 | value. We only put non-function symbols from dynamic | |
4220 | objects on this list, because that happens to be the only | |
4221 | time we need to know the normal symbol corresponding to a | |
4222 | weak symbol, and the information is time consuming to | |
4223 | figure out. If the weakdef field is not already NULL, | |
4224 | then this symbol was already defined by some previous | |
4225 | dynamic object, and we will be using that previous | |
4226 | definition anyhow. */ | |
4227 | ||
f6e332e6 | 4228 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4229 | weaks = h; |
4230 | new_weakdef = TRUE; | |
4231 | } | |
4232 | ||
4233 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4234 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4235 | && h->root.type == bfd_link_hash_common) |
4236 | { | |
4237 | unsigned int align; | |
4238 | ||
a4d8e49b | 4239 | if (common) |
af44c138 L |
4240 | align = bfd_log2 (isym->st_value); |
4241 | else | |
4242 | { | |
4243 | /* The new symbol is a common symbol in a shared object. | |
4244 | We need to get the alignment from the section. */ | |
4245 | align = new_sec->alignment_power; | |
4246 | } | |
595213d4 | 4247 | if (align > old_alignment) |
4ad4eba5 AM |
4248 | h->root.u.c.p->alignment_power = align; |
4249 | else | |
4250 | h->root.u.c.p->alignment_power = old_alignment; | |
4251 | } | |
4252 | ||
66eb6687 | 4253 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4254 | { |
4ad4eba5 | 4255 | bfd_boolean dynsym; |
4ad4eba5 AM |
4256 | |
4257 | /* Check the alignment when a common symbol is involved. This | |
4258 | can change when a common symbol is overridden by a normal | |
4259 | definition or a common symbol is ignored due to the old | |
4260 | normal definition. We need to make sure the maximum | |
4261 | alignment is maintained. */ | |
a4d8e49b | 4262 | if ((old_alignment || common) |
4ad4eba5 AM |
4263 | && h->root.type != bfd_link_hash_common) |
4264 | { | |
4265 | unsigned int common_align; | |
4266 | unsigned int normal_align; | |
4267 | unsigned int symbol_align; | |
4268 | bfd *normal_bfd; | |
4269 | bfd *common_bfd; | |
4270 | ||
4271 | symbol_align = ffs (h->root.u.def.value) - 1; | |
4272 | if (h->root.u.def.section->owner != NULL | |
4273 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
4274 | { | |
4275 | normal_align = h->root.u.def.section->alignment_power; | |
4276 | if (normal_align > symbol_align) | |
4277 | normal_align = symbol_align; | |
4278 | } | |
4279 | else | |
4280 | normal_align = symbol_align; | |
4281 | ||
4282 | if (old_alignment) | |
4283 | { | |
4284 | common_align = old_alignment; | |
4285 | common_bfd = old_bfd; | |
4286 | normal_bfd = abfd; | |
4287 | } | |
4288 | else | |
4289 | { | |
4290 | common_align = bfd_log2 (isym->st_value); | |
4291 | common_bfd = abfd; | |
4292 | normal_bfd = old_bfd; | |
4293 | } | |
4294 | ||
4295 | if (normal_align < common_align) | |
d07676f8 NC |
4296 | { |
4297 | /* PR binutils/2735 */ | |
4298 | if (normal_bfd == NULL) | |
4299 | (*_bfd_error_handler) | |
4300 | (_("Warning: alignment %u of common symbol `%s' in %B" | |
4301 | " is greater than the alignment (%u) of its section %A"), | |
4302 | common_bfd, h->root.u.def.section, | |
4303 | 1 << common_align, name, 1 << normal_align); | |
4304 | else | |
4305 | (*_bfd_error_handler) | |
4306 | (_("Warning: alignment %u of symbol `%s' in %B" | |
4307 | " is smaller than %u in %B"), | |
4308 | normal_bfd, common_bfd, | |
4309 | 1 << normal_align, name, 1 << common_align); | |
4310 | } | |
4ad4eba5 AM |
4311 | } |
4312 | ||
83ad0046 L |
4313 | /* Remember the symbol size if it isn't undefined. */ |
4314 | if ((isym->st_size != 0 && isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 AM |
4315 | && (definition || h->size == 0)) |
4316 | { | |
83ad0046 L |
4317 | if (h->size != 0 |
4318 | && h->size != isym->st_size | |
4319 | && ! size_change_ok) | |
4ad4eba5 | 4320 | (*_bfd_error_handler) |
d003868e AM |
4321 | (_("Warning: size of symbol `%s' changed" |
4322 | " from %lu in %B to %lu in %B"), | |
4323 | old_bfd, abfd, | |
4ad4eba5 | 4324 | name, (unsigned long) h->size, |
d003868e | 4325 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4326 | |
4327 | h->size = isym->st_size; | |
4328 | } | |
4329 | ||
4330 | /* If this is a common symbol, then we always want H->SIZE | |
4331 | to be the size of the common symbol. The code just above | |
4332 | won't fix the size if a common symbol becomes larger. We | |
4333 | don't warn about a size change here, because that is | |
fcb93ecf PB |
4334 | covered by --warn-common. Allow changed between different |
4335 | function types. */ | |
4ad4eba5 AM |
4336 | if (h->root.type == bfd_link_hash_common) |
4337 | h->size = h->root.u.c.size; | |
4338 | ||
4339 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
4340 | && (definition || h->type == STT_NOTYPE)) | |
4341 | { | |
2955ec4c L |
4342 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4343 | ||
4344 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4345 | symbol. */ | |
4346 | if (type == STT_GNU_IFUNC | |
4347 | && (abfd->flags & DYNAMIC) != 0) | |
4348 | type = STT_FUNC; | |
4ad4eba5 | 4349 | |
2955ec4c L |
4350 | if (h->type != type) |
4351 | { | |
4352 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
4353 | (*_bfd_error_handler) | |
4354 | (_("Warning: type of symbol `%s' changed" | |
4355 | " from %d to %d in %B"), | |
4356 | abfd, name, h->type, type); | |
4357 | ||
4358 | h->type = type; | |
4359 | } | |
4ad4eba5 AM |
4360 | } |
4361 | ||
54ac0771 L |
4362 | /* Merge st_other field. */ |
4363 | elf_merge_st_other (abfd, h, isym, definition, dynamic); | |
4ad4eba5 AM |
4364 | |
4365 | /* Set a flag in the hash table entry indicating the type of | |
4366 | reference or definition we just found. Keep a count of | |
4367 | the number of dynamic symbols we find. A dynamic symbol | |
4368 | is one which is referenced or defined by both a regular | |
4369 | object and a shared object. */ | |
4ad4eba5 AM |
4370 | dynsym = FALSE; |
4371 | if (! dynamic) | |
4372 | { | |
4373 | if (! definition) | |
4374 | { | |
f5385ebf | 4375 | h->ref_regular = 1; |
4ad4eba5 | 4376 | if (bind != STB_WEAK) |
f5385ebf | 4377 | h->ref_regular_nonweak = 1; |
4ad4eba5 AM |
4378 | } |
4379 | else | |
d8880531 L |
4380 | { |
4381 | h->def_regular = 1; | |
4382 | if (h->def_dynamic) | |
4383 | { | |
4384 | h->def_dynamic = 0; | |
4385 | h->ref_dynamic = 1; | |
4386 | h->dynamic_def = 1; | |
4387 | } | |
4388 | } | |
4ad4eba5 | 4389 | if (! info->executable |
f5385ebf AM |
4390 | || h->def_dynamic |
4391 | || h->ref_dynamic) | |
4ad4eba5 AM |
4392 | dynsym = TRUE; |
4393 | } | |
4394 | else | |
4395 | { | |
4396 | if (! definition) | |
f5385ebf | 4397 | h->ref_dynamic = 1; |
4ad4eba5 | 4398 | else |
f5385ebf AM |
4399 | h->def_dynamic = 1; |
4400 | if (h->def_regular | |
4401 | || h->ref_regular | |
f6e332e6 | 4402 | || (h->u.weakdef != NULL |
4ad4eba5 | 4403 | && ! new_weakdef |
f6e332e6 | 4404 | && h->u.weakdef->dynindx != -1)) |
4ad4eba5 AM |
4405 | dynsym = TRUE; |
4406 | } | |
4407 | ||
b2064611 | 4408 | if (definition && (sec->flags & SEC_DEBUGGING) && !info->relocatable) |
92b7c7b6 L |
4409 | { |
4410 | /* We don't want to make debug symbol dynamic. */ | |
92b7c7b6 L |
4411 | dynsym = FALSE; |
4412 | } | |
4413 | ||
35fc36a8 RS |
4414 | if (definition) |
4415 | h->target_internal = isym->st_target_internal; | |
4416 | ||
4ad4eba5 AM |
4417 | /* Check to see if we need to add an indirect symbol for |
4418 | the default name. */ | |
4419 | if (definition || h->root.type == bfd_link_hash_common) | |
4420 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4421 | &sec, &value, &dynsym, | |
4422 | override)) | |
4423 | goto error_free_vers; | |
4424 | ||
4425 | if (definition && !dynamic) | |
4426 | { | |
4427 | char *p = strchr (name, ELF_VER_CHR); | |
4428 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4429 | { | |
4430 | /* Queue non-default versions so that .symver x, x@FOO | |
4431 | aliases can be checked. */ | |
66eb6687 | 4432 | if (!nondeflt_vers) |
4ad4eba5 | 4433 | { |
66eb6687 AM |
4434 | amt = ((isymend - isym + 1) |
4435 | * sizeof (struct elf_link_hash_entry *)); | |
a50b1753 NC |
4436 | nondeflt_vers = |
4437 | (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4438 | if (!nondeflt_vers) |
4439 | goto error_free_vers; | |
4ad4eba5 | 4440 | } |
66eb6687 | 4441 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4442 | } |
4443 | } | |
4444 | ||
4445 | if (dynsym && h->dynindx == -1) | |
4446 | { | |
c152c796 | 4447 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4448 | goto error_free_vers; |
f6e332e6 | 4449 | if (h->u.weakdef != NULL |
4ad4eba5 | 4450 | && ! new_weakdef |
f6e332e6 | 4451 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4452 | { |
66eb6687 | 4453 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4454 | goto error_free_vers; |
4455 | } | |
4456 | } | |
4457 | else if (dynsym && h->dynindx != -1) | |
4458 | /* If the symbol already has a dynamic index, but | |
4459 | visibility says it should not be visible, turn it into | |
4460 | a local symbol. */ | |
4461 | switch (ELF_ST_VISIBILITY (h->other)) | |
4462 | { | |
4463 | case STV_INTERNAL: | |
4464 | case STV_HIDDEN: | |
4465 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4466 | dynsym = FALSE; | |
4467 | break; | |
4468 | } | |
4469 | ||
4470 | if (!add_needed | |
4471 | && definition | |
010e5ae2 AM |
4472 | && ((dynsym |
4473 | && h->ref_regular) | |
4474 | || (h->ref_dynamic | |
4475 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 | |
4476 | && !on_needed_list (elf_dt_name (abfd), htab->needed)))) | |
4ad4eba5 AM |
4477 | { |
4478 | int ret; | |
4479 | const char *soname = elf_dt_name (abfd); | |
4480 | ||
4481 | /* A symbol from a library loaded via DT_NEEDED of some | |
4482 | other library is referenced by a regular object. | |
e56f61be | 4483 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4484 | --no-add-needed is used and the reference was not |
4485 | a weak one. */ | |
4486 | if (undef_bfd != NULL | |
4487 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) | |
e56f61be L |
4488 | { |
4489 | (*_bfd_error_handler) | |
3cbc5de0 | 4490 | (_("%B: undefined reference to symbol '%s'"), |
b918acf9 | 4491 | undef_bfd, name); |
3cbc5de0 NC |
4492 | (*_bfd_error_handler) |
4493 | (_("note: '%s' is defined in DSO %B so try adding it to the linker command line"), | |
d003868e | 4494 | abfd, name); |
3cbc5de0 | 4495 | bfd_set_error (bfd_error_invalid_operation); |
e56f61be L |
4496 | goto error_free_vers; |
4497 | } | |
4498 | ||
a50b1753 NC |
4499 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
4500 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); | |
a5db907e | 4501 | |
4ad4eba5 | 4502 | add_needed = TRUE; |
7e9f0867 | 4503 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4504 | if (ret < 0) |
4505 | goto error_free_vers; | |
4506 | ||
4507 | BFD_ASSERT (ret == 0); | |
4508 | } | |
4509 | } | |
4510 | } | |
4511 | ||
66eb6687 AM |
4512 | if (extversym != NULL) |
4513 | { | |
4514 | free (extversym); | |
4515 | extversym = NULL; | |
4516 | } | |
4517 | ||
4518 | if (isymbuf != NULL) | |
4519 | { | |
4520 | free (isymbuf); | |
4521 | isymbuf = NULL; | |
4522 | } | |
4523 | ||
4524 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4525 | { | |
4526 | unsigned int i; | |
4527 | ||
4528 | /* Restore the symbol table. */ | |
97fed1c9 JJ |
4529 | if (bed->as_needed_cleanup) |
4530 | (*bed->as_needed_cleanup) (abfd, info); | |
66eb6687 AM |
4531 | old_hash = (char *) old_tab + tabsize; |
4532 | old_ent = (char *) old_hash + hashsize; | |
4533 | sym_hash = elf_sym_hashes (abfd); | |
4f87808c AM |
4534 | htab->root.table.table = old_table; |
4535 | htab->root.table.size = old_size; | |
4536 | htab->root.table.count = old_count; | |
66eb6687 AM |
4537 | memcpy (htab->root.table.table, old_tab, tabsize); |
4538 | memcpy (sym_hash, old_hash, hashsize); | |
4539 | htab->root.undefs = old_undefs; | |
4540 | htab->root.undefs_tail = old_undefs_tail; | |
4541 | for (i = 0; i < htab->root.table.size; i++) | |
4542 | { | |
4543 | struct bfd_hash_entry *p; | |
4544 | struct elf_link_hash_entry *h; | |
4545 | ||
4546 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4547 | { | |
4548 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4549 | if (h->root.type == bfd_link_hash_warning) |
4550 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
66eb6687 AM |
4551 | if (h->dynindx >= old_dynsymcount) |
4552 | _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index); | |
2de92251 | 4553 | |
66eb6687 AM |
4554 | memcpy (p, old_ent, htab->root.table.entsize); |
4555 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4556 | h = (struct elf_link_hash_entry *) p; |
4557 | if (h->root.type == bfd_link_hash_warning) | |
4558 | { | |
4559 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4560 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
4561 | } | |
66eb6687 AM |
4562 | } |
4563 | } | |
4564 | ||
5061a885 AM |
4565 | /* Make a special call to the linker "notice" function to |
4566 | tell it that symbols added for crefs may need to be removed. */ | |
4567 | if (!(*info->callbacks->notice) (info, NULL, abfd, NULL, | |
16d96b5b | 4568 | notice_not_needed, 0, NULL)) |
9af2a943 | 4569 | goto error_free_vers; |
5061a885 | 4570 | |
66eb6687 AM |
4571 | free (old_tab); |
4572 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4573 | alloc_mark); | |
4574 | if (nondeflt_vers != NULL) | |
4575 | free (nondeflt_vers); | |
4576 | return TRUE; | |
4577 | } | |
2de92251 | 4578 | |
66eb6687 AM |
4579 | if (old_tab != NULL) |
4580 | { | |
5061a885 | 4581 | if (!(*info->callbacks->notice) (info, NULL, abfd, NULL, |
16d96b5b | 4582 | notice_needed, 0, NULL)) |
9af2a943 | 4583 | goto error_free_vers; |
66eb6687 AM |
4584 | free (old_tab); |
4585 | old_tab = NULL; | |
4586 | } | |
4587 | ||
4ad4eba5 AM |
4588 | /* Now that all the symbols from this input file are created, handle |
4589 | .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */ | |
4590 | if (nondeflt_vers != NULL) | |
4591 | { | |
4592 | bfd_size_type cnt, symidx; | |
4593 | ||
4594 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4595 | { | |
4596 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4597 | char *shortname, *p; | |
4598 | ||
4599 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4600 | if (p == NULL | |
4601 | || (h->root.type != bfd_link_hash_defined | |
4602 | && h->root.type != bfd_link_hash_defweak)) | |
4603 | continue; | |
4604 | ||
4605 | amt = p - h->root.root.string; | |
a50b1753 | 4606 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4607 | if (!shortname) |
4608 | goto error_free_vers; | |
4ad4eba5 AM |
4609 | memcpy (shortname, h->root.root.string, amt); |
4610 | shortname[amt] = '\0'; | |
4611 | ||
4612 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4613 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4614 | FALSE, FALSE, FALSE); |
4615 | if (hi != NULL | |
4616 | && hi->root.type == h->root.type | |
4617 | && hi->root.u.def.value == h->root.u.def.value | |
4618 | && hi->root.u.def.section == h->root.u.def.section) | |
4619 | { | |
4620 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4621 | hi->root.type = bfd_link_hash_indirect; | |
4622 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4623 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4624 | sym_hash = elf_sym_hashes (abfd); |
4625 | if (sym_hash) | |
4626 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4627 | if (sym_hash[symidx] == hi) | |
4628 | { | |
4629 | sym_hash[symidx] = h; | |
4630 | break; | |
4631 | } | |
4632 | } | |
4633 | free (shortname); | |
4634 | } | |
4635 | free (nondeflt_vers); | |
4636 | nondeflt_vers = NULL; | |
4637 | } | |
4638 | ||
4ad4eba5 AM |
4639 | /* Now set the weakdefs field correctly for all the weak defined |
4640 | symbols we found. The only way to do this is to search all the | |
4641 | symbols. Since we only need the information for non functions in | |
4642 | dynamic objects, that's the only time we actually put anything on | |
4643 | the list WEAKS. We need this information so that if a regular | |
4644 | object refers to a symbol defined weakly in a dynamic object, the | |
4645 | real symbol in the dynamic object is also put in the dynamic | |
4646 | symbols; we also must arrange for both symbols to point to the | |
4647 | same memory location. We could handle the general case of symbol | |
4648 | aliasing, but a general symbol alias can only be generated in | |
4649 | assembler code, handling it correctly would be very time | |
4650 | consuming, and other ELF linkers don't handle general aliasing | |
4651 | either. */ | |
4652 | if (weaks != NULL) | |
4653 | { | |
4654 | struct elf_link_hash_entry **hpp; | |
4655 | struct elf_link_hash_entry **hppend; | |
4656 | struct elf_link_hash_entry **sorted_sym_hash; | |
4657 | struct elf_link_hash_entry *h; | |
4658 | size_t sym_count; | |
4659 | ||
4660 | /* Since we have to search the whole symbol list for each weak | |
4661 | defined symbol, search time for N weak defined symbols will be | |
4662 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
4663 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 4664 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
4665 | if (sorted_sym_hash == NULL) |
4666 | goto error_return; | |
4667 | sym_hash = sorted_sym_hash; | |
4668 | hpp = elf_sym_hashes (abfd); | |
4669 | hppend = hpp + extsymcount; | |
4670 | sym_count = 0; | |
4671 | for (; hpp < hppend; hpp++) | |
4672 | { | |
4673 | h = *hpp; | |
4674 | if (h != NULL | |
4675 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 4676 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
4677 | { |
4678 | *sym_hash = h; | |
4679 | sym_hash++; | |
4680 | sym_count++; | |
4681 | } | |
4682 | } | |
4683 | ||
4684 | qsort (sorted_sym_hash, sym_count, | |
4685 | sizeof (struct elf_link_hash_entry *), | |
4686 | elf_sort_symbol); | |
4687 | ||
4688 | while (weaks != NULL) | |
4689 | { | |
4690 | struct elf_link_hash_entry *hlook; | |
4691 | asection *slook; | |
4692 | bfd_vma vlook; | |
4693 | long ilook; | |
4694 | size_t i, j, idx; | |
4695 | ||
4696 | hlook = weaks; | |
f6e332e6 AM |
4697 | weaks = hlook->u.weakdef; |
4698 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
4699 | |
4700 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
4701 | || hlook->root.type == bfd_link_hash_defweak | |
4702 | || hlook->root.type == bfd_link_hash_common | |
4703 | || hlook->root.type == bfd_link_hash_indirect); | |
4704 | slook = hlook->root.u.def.section; | |
4705 | vlook = hlook->root.u.def.value; | |
4706 | ||
4707 | ilook = -1; | |
4708 | i = 0; | |
4709 | j = sym_count; | |
4710 | while (i < j) | |
4711 | { | |
4712 | bfd_signed_vma vdiff; | |
4713 | idx = (i + j) / 2; | |
4714 | h = sorted_sym_hash [idx]; | |
4715 | vdiff = vlook - h->root.u.def.value; | |
4716 | if (vdiff < 0) | |
4717 | j = idx; | |
4718 | else if (vdiff > 0) | |
4719 | i = idx + 1; | |
4720 | else | |
4721 | { | |
a9b881be | 4722 | long sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
4723 | if (sdiff < 0) |
4724 | j = idx; | |
4725 | else if (sdiff > 0) | |
4726 | i = idx + 1; | |
4727 | else | |
4728 | { | |
4729 | ilook = idx; | |
4730 | break; | |
4731 | } | |
4732 | } | |
4733 | } | |
4734 | ||
4735 | /* We didn't find a value/section match. */ | |
4736 | if (ilook == -1) | |
4737 | continue; | |
4738 | ||
4739 | for (i = ilook; i < sym_count; i++) | |
4740 | { | |
4741 | h = sorted_sym_hash [i]; | |
4742 | ||
4743 | /* Stop if value or section doesn't match. */ | |
4744 | if (h->root.u.def.value != vlook | |
4745 | || h->root.u.def.section != slook) | |
4746 | break; | |
4747 | else if (h != hlook) | |
4748 | { | |
f6e332e6 | 4749 | hlook->u.weakdef = h; |
4ad4eba5 AM |
4750 | |
4751 | /* If the weak definition is in the list of dynamic | |
4752 | symbols, make sure the real definition is put | |
4753 | there as well. */ | |
4754 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
4755 | { | |
c152c796 | 4756 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
4757 | { |
4758 | err_free_sym_hash: | |
4759 | free (sorted_sym_hash); | |
4760 | goto error_return; | |
4761 | } | |
4ad4eba5 AM |
4762 | } |
4763 | ||
4764 | /* If the real definition is in the list of dynamic | |
4765 | symbols, make sure the weak definition is put | |
4766 | there as well. If we don't do this, then the | |
4767 | dynamic loader might not merge the entries for the | |
4768 | real definition and the weak definition. */ | |
4769 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
4770 | { | |
c152c796 | 4771 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 4772 | goto err_free_sym_hash; |
4ad4eba5 AM |
4773 | } |
4774 | break; | |
4775 | } | |
4776 | } | |
4777 | } | |
4778 | ||
4779 | free (sorted_sym_hash); | |
4780 | } | |
4781 | ||
33177bb1 AM |
4782 | if (bed->check_directives |
4783 | && !(*bed->check_directives) (abfd, info)) | |
4784 | return FALSE; | |
85fbca6a | 4785 | |
4ad4eba5 AM |
4786 | /* If this object is the same format as the output object, and it is |
4787 | not a shared library, then let the backend look through the | |
4788 | relocs. | |
4789 | ||
4790 | This is required to build global offset table entries and to | |
4791 | arrange for dynamic relocs. It is not required for the | |
4792 | particular common case of linking non PIC code, even when linking | |
4793 | against shared libraries, but unfortunately there is no way of | |
4794 | knowing whether an object file has been compiled PIC or not. | |
4795 | Looking through the relocs is not particularly time consuming. | |
4796 | The problem is that we must either (1) keep the relocs in memory, | |
4797 | which causes the linker to require additional runtime memory or | |
4798 | (2) read the relocs twice from the input file, which wastes time. | |
4799 | This would be a good case for using mmap. | |
4800 | ||
4801 | I have no idea how to handle linking PIC code into a file of a | |
4802 | different format. It probably can't be done. */ | |
4ad4eba5 | 4803 | if (! dynamic |
66eb6687 | 4804 | && is_elf_hash_table (htab) |
13285a1b | 4805 | && bed->check_relocs != NULL |
39334f3a | 4806 | && elf_object_id (abfd) == elf_hash_table_id (htab) |
f13a99db | 4807 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) |
4ad4eba5 AM |
4808 | { |
4809 | asection *o; | |
4810 | ||
4811 | for (o = abfd->sections; o != NULL; o = o->next) | |
4812 | { | |
4813 | Elf_Internal_Rela *internal_relocs; | |
4814 | bfd_boolean ok; | |
4815 | ||
4816 | if ((o->flags & SEC_RELOC) == 0 | |
4817 | || o->reloc_count == 0 | |
4818 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4819 | && (o->flags & SEC_DEBUGGING) != 0) | |
4820 | || bfd_is_abs_section (o->output_section)) | |
4821 | continue; | |
4822 | ||
4823 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4824 | info->keep_memory); | |
4825 | if (internal_relocs == NULL) | |
4826 | goto error_return; | |
4827 | ||
66eb6687 | 4828 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); |
4ad4eba5 AM |
4829 | |
4830 | if (elf_section_data (o)->relocs != internal_relocs) | |
4831 | free (internal_relocs); | |
4832 | ||
4833 | if (! ok) | |
4834 | goto error_return; | |
4835 | } | |
4836 | } | |
4837 | ||
4838 | /* If this is a non-traditional link, try to optimize the handling | |
4839 | of the .stab/.stabstr sections. */ | |
4840 | if (! dynamic | |
4841 | && ! info->traditional_format | |
66eb6687 | 4842 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
4843 | && (info->strip != strip_all && info->strip != strip_debugger)) |
4844 | { | |
4845 | asection *stabstr; | |
4846 | ||
4847 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
4848 | if (stabstr != NULL) | |
4849 | { | |
4850 | bfd_size_type string_offset = 0; | |
4851 | asection *stab; | |
4852 | ||
4853 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 4854 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
4855 | && (!stab->name[5] || |
4856 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
4857 | && (stab->flags & SEC_MERGE) == 0 | |
4858 | && !bfd_is_abs_section (stab->output_section)) | |
4859 | { | |
4860 | struct bfd_elf_section_data *secdata; | |
4861 | ||
4862 | secdata = elf_section_data (stab); | |
66eb6687 AM |
4863 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
4864 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
4865 | &string_offset)) |
4866 | goto error_return; | |
4867 | if (secdata->sec_info) | |
4868 | stab->sec_info_type = ELF_INFO_TYPE_STABS; | |
4869 | } | |
4870 | } | |
4871 | } | |
4872 | ||
66eb6687 | 4873 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
4874 | { |
4875 | /* Add this bfd to the loaded list. */ | |
4876 | struct elf_link_loaded_list *n; | |
4877 | ||
a50b1753 NC |
4878 | n = (struct elf_link_loaded_list *) |
4879 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list)); | |
4ad4eba5 AM |
4880 | if (n == NULL) |
4881 | goto error_return; | |
4882 | n->abfd = abfd; | |
66eb6687 AM |
4883 | n->next = htab->loaded; |
4884 | htab->loaded = n; | |
4ad4eba5 AM |
4885 | } |
4886 | ||
4887 | return TRUE; | |
4888 | ||
4889 | error_free_vers: | |
66eb6687 AM |
4890 | if (old_tab != NULL) |
4891 | free (old_tab); | |
4ad4eba5 AM |
4892 | if (nondeflt_vers != NULL) |
4893 | free (nondeflt_vers); | |
4894 | if (extversym != NULL) | |
4895 | free (extversym); | |
4896 | error_free_sym: | |
4897 | if (isymbuf != NULL) | |
4898 | free (isymbuf); | |
4899 | error_return: | |
4900 | return FALSE; | |
4901 | } | |
4902 | ||
8387904d AM |
4903 | /* Return the linker hash table entry of a symbol that might be |
4904 | satisfied by an archive symbol. Return -1 on error. */ | |
4905 | ||
4906 | struct elf_link_hash_entry * | |
4907 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
4908 | struct bfd_link_info *info, | |
4909 | const char *name) | |
4910 | { | |
4911 | struct elf_link_hash_entry *h; | |
4912 | char *p, *copy; | |
4913 | size_t len, first; | |
4914 | ||
2a41f396 | 4915 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
4916 | if (h != NULL) |
4917 | return h; | |
4918 | ||
4919 | /* If this is a default version (the name contains @@), look up the | |
4920 | symbol again with only one `@' as well as without the version. | |
4921 | The effect is that references to the symbol with and without the | |
4922 | version will be matched by the default symbol in the archive. */ | |
4923 | ||
4924 | p = strchr (name, ELF_VER_CHR); | |
4925 | if (p == NULL || p[1] != ELF_VER_CHR) | |
4926 | return h; | |
4927 | ||
4928 | /* First check with only one `@'. */ | |
4929 | len = strlen (name); | |
a50b1753 | 4930 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
4931 | if (copy == NULL) |
4932 | return (struct elf_link_hash_entry *) 0 - 1; | |
4933 | ||
4934 | first = p - name + 1; | |
4935 | memcpy (copy, name, first); | |
4936 | memcpy (copy + first, name + first + 1, len - first); | |
4937 | ||
2a41f396 | 4938 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
4939 | if (h == NULL) |
4940 | { | |
4941 | /* We also need to check references to the symbol without the | |
4942 | version. */ | |
4943 | copy[first - 1] = '\0'; | |
4944 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 4945 | FALSE, FALSE, TRUE); |
8387904d AM |
4946 | } |
4947 | ||
4948 | bfd_release (abfd, copy); | |
4949 | return h; | |
4950 | } | |
4951 | ||
0ad989f9 L |
4952 | /* Add symbols from an ELF archive file to the linker hash table. We |
4953 | don't use _bfd_generic_link_add_archive_symbols because of a | |
4954 | problem which arises on UnixWare. The UnixWare libc.so is an | |
4955 | archive which includes an entry libc.so.1 which defines a bunch of | |
4956 | symbols. The libc.so archive also includes a number of other | |
4957 | object files, which also define symbols, some of which are the same | |
4958 | as those defined in libc.so.1. Correct linking requires that we | |
4959 | consider each object file in turn, and include it if it defines any | |
4960 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
4961 | this; it looks through the list of undefined symbols, and includes | |
4962 | any object file which defines them. When this algorithm is used on | |
4963 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
4964 | bunch of symbols. This means that some of the other objects in the | |
4965 | archive are not included in the link, which is incorrect since they | |
4966 | precede libc.so.1 in the archive. | |
4967 | ||
4968 | Fortunately, ELF archive handling is simpler than that done by | |
4969 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
4970 | oddities. In ELF, if we find a symbol in the archive map, and the | |
4971 | symbol is currently undefined, we know that we must pull in that | |
4972 | object file. | |
4973 | ||
4974 | Unfortunately, we do have to make multiple passes over the symbol | |
4975 | table until nothing further is resolved. */ | |
4976 | ||
4ad4eba5 AM |
4977 | static bfd_boolean |
4978 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
4979 | { |
4980 | symindex c; | |
4981 | bfd_boolean *defined = NULL; | |
4982 | bfd_boolean *included = NULL; | |
4983 | carsym *symdefs; | |
4984 | bfd_boolean loop; | |
4985 | bfd_size_type amt; | |
8387904d AM |
4986 | const struct elf_backend_data *bed; |
4987 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
4988 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
4989 | |
4990 | if (! bfd_has_map (abfd)) | |
4991 | { | |
4992 | /* An empty archive is a special case. */ | |
4993 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
4994 | return TRUE; | |
4995 | bfd_set_error (bfd_error_no_armap); | |
4996 | return FALSE; | |
4997 | } | |
4998 | ||
4999 | /* Keep track of all symbols we know to be already defined, and all | |
5000 | files we know to be already included. This is to speed up the | |
5001 | second and subsequent passes. */ | |
5002 | c = bfd_ardata (abfd)->symdef_count; | |
5003 | if (c == 0) | |
5004 | return TRUE; | |
5005 | amt = c; | |
5006 | amt *= sizeof (bfd_boolean); | |
a50b1753 NC |
5007 | defined = (bfd_boolean *) bfd_zmalloc (amt); |
5008 | included = (bfd_boolean *) bfd_zmalloc (amt); | |
0ad989f9 L |
5009 | if (defined == NULL || included == NULL) |
5010 | goto error_return; | |
5011 | ||
5012 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5013 | bed = get_elf_backend_data (abfd); |
5014 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5015 | |
5016 | do | |
5017 | { | |
5018 | file_ptr last; | |
5019 | symindex i; | |
5020 | carsym *symdef; | |
5021 | carsym *symdefend; | |
5022 | ||
5023 | loop = FALSE; | |
5024 | last = -1; | |
5025 | ||
5026 | symdef = symdefs; | |
5027 | symdefend = symdef + c; | |
5028 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5029 | { | |
5030 | struct elf_link_hash_entry *h; | |
5031 | bfd *element; | |
5032 | struct bfd_link_hash_entry *undefs_tail; | |
5033 | symindex mark; | |
5034 | ||
5035 | if (defined[i] || included[i]) | |
5036 | continue; | |
5037 | if (symdef->file_offset == last) | |
5038 | { | |
5039 | included[i] = TRUE; | |
5040 | continue; | |
5041 | } | |
5042 | ||
8387904d AM |
5043 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5044 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5045 | goto error_return; | |
0ad989f9 L |
5046 | |
5047 | if (h == NULL) | |
5048 | continue; | |
5049 | ||
5050 | if (h->root.type == bfd_link_hash_common) | |
5051 | { | |
5052 | /* We currently have a common symbol. The archive map contains | |
5053 | a reference to this symbol, so we may want to include it. We | |
5054 | only want to include it however, if this archive element | |
5055 | contains a definition of the symbol, not just another common | |
5056 | declaration of it. | |
5057 | ||
5058 | Unfortunately some archivers (including GNU ar) will put | |
5059 | declarations of common symbols into their archive maps, as | |
5060 | well as real definitions, so we cannot just go by the archive | |
5061 | map alone. Instead we must read in the element's symbol | |
5062 | table and check that to see what kind of symbol definition | |
5063 | this is. */ | |
5064 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5065 | continue; | |
5066 | } | |
5067 | else if (h->root.type != bfd_link_hash_undefined) | |
5068 | { | |
5069 | if (h->root.type != bfd_link_hash_undefweak) | |
5070 | defined[i] = TRUE; | |
5071 | continue; | |
5072 | } | |
5073 | ||
5074 | /* We need to include this archive member. */ | |
5075 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5076 | if (element == NULL) | |
5077 | goto error_return; | |
5078 | ||
5079 | if (! bfd_check_format (element, bfd_object)) | |
5080 | goto error_return; | |
5081 | ||
5082 | /* Doublecheck that we have not included this object | |
5083 | already--it should be impossible, but there may be | |
5084 | something wrong with the archive. */ | |
5085 | if (element->archive_pass != 0) | |
5086 | { | |
5087 | bfd_set_error (bfd_error_bad_value); | |
5088 | goto error_return; | |
5089 | } | |
5090 | element->archive_pass = 1; | |
5091 | ||
5092 | undefs_tail = info->hash->undefs_tail; | |
5093 | ||
0e144ba7 AM |
5094 | if (!(*info->callbacks |
5095 | ->add_archive_element) (info, element, symdef->name, &element)) | |
0ad989f9 | 5096 | goto error_return; |
0e144ba7 | 5097 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5098 | goto error_return; |
5099 | ||
5100 | /* If there are any new undefined symbols, we need to make | |
5101 | another pass through the archive in order to see whether | |
5102 | they can be defined. FIXME: This isn't perfect, because | |
5103 | common symbols wind up on undefs_tail and because an | |
5104 | undefined symbol which is defined later on in this pass | |
5105 | does not require another pass. This isn't a bug, but it | |
5106 | does make the code less efficient than it could be. */ | |
5107 | if (undefs_tail != info->hash->undefs_tail) | |
5108 | loop = TRUE; | |
5109 | ||
5110 | /* Look backward to mark all symbols from this object file | |
5111 | which we have already seen in this pass. */ | |
5112 | mark = i; | |
5113 | do | |
5114 | { | |
5115 | included[mark] = TRUE; | |
5116 | if (mark == 0) | |
5117 | break; | |
5118 | --mark; | |
5119 | } | |
5120 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5121 | ||
5122 | /* We mark subsequent symbols from this object file as we go | |
5123 | on through the loop. */ | |
5124 | last = symdef->file_offset; | |
5125 | } | |
5126 | } | |
5127 | while (loop); | |
5128 | ||
5129 | free (defined); | |
5130 | free (included); | |
5131 | ||
5132 | return TRUE; | |
5133 | ||
5134 | error_return: | |
5135 | if (defined != NULL) | |
5136 | free (defined); | |
5137 | if (included != NULL) | |
5138 | free (included); | |
5139 | return FALSE; | |
5140 | } | |
4ad4eba5 AM |
5141 | |
5142 | /* Given an ELF BFD, add symbols to the global hash table as | |
5143 | appropriate. */ | |
5144 | ||
5145 | bfd_boolean | |
5146 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5147 | { | |
5148 | switch (bfd_get_format (abfd)) | |
5149 | { | |
5150 | case bfd_object: | |
5151 | return elf_link_add_object_symbols (abfd, info); | |
5152 | case bfd_archive: | |
5153 | return elf_link_add_archive_symbols (abfd, info); | |
5154 | default: | |
5155 | bfd_set_error (bfd_error_wrong_format); | |
5156 | return FALSE; | |
5157 | } | |
5158 | } | |
5a580b3a | 5159 | \f |
14b1c01e AM |
5160 | struct hash_codes_info |
5161 | { | |
5162 | unsigned long *hashcodes; | |
5163 | bfd_boolean error; | |
5164 | }; | |
a0c8462f | 5165 | |
5a580b3a AM |
5166 | /* This function will be called though elf_link_hash_traverse to store |
5167 | all hash value of the exported symbols in an array. */ | |
5168 | ||
5169 | static bfd_boolean | |
5170 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5171 | { | |
a50b1753 | 5172 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a AM |
5173 | const char *name; |
5174 | char *p; | |
5175 | unsigned long ha; | |
5176 | char *alc = NULL; | |
5177 | ||
5178 | if (h->root.type == bfd_link_hash_warning) | |
5179 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5180 | ||
5181 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
5182 | if (h->dynindx == -1) | |
5183 | return TRUE; | |
5184 | ||
5185 | name = h->root.root.string; | |
5186 | p = strchr (name, ELF_VER_CHR); | |
5187 | if (p != NULL) | |
5188 | { | |
a50b1753 | 5189 | alc = (char *) bfd_malloc (p - name + 1); |
14b1c01e AM |
5190 | if (alc == NULL) |
5191 | { | |
5192 | inf->error = TRUE; | |
5193 | return FALSE; | |
5194 | } | |
5a580b3a AM |
5195 | memcpy (alc, name, p - name); |
5196 | alc[p - name] = '\0'; | |
5197 | name = alc; | |
5198 | } | |
5199 | ||
5200 | /* Compute the hash value. */ | |
5201 | ha = bfd_elf_hash (name); | |
5202 | ||
5203 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5204 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5205 | |
5206 | /* And store it in the struct so that we can put it in the hash table | |
5207 | later. */ | |
f6e332e6 | 5208 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5209 | |
5210 | if (alc != NULL) | |
5211 | free (alc); | |
5212 | ||
5213 | return TRUE; | |
5214 | } | |
5215 | ||
fdc90cb4 JJ |
5216 | struct collect_gnu_hash_codes |
5217 | { | |
5218 | bfd *output_bfd; | |
5219 | const struct elf_backend_data *bed; | |
5220 | unsigned long int nsyms; | |
5221 | unsigned long int maskbits; | |
5222 | unsigned long int *hashcodes; | |
5223 | unsigned long int *hashval; | |
5224 | unsigned long int *indx; | |
5225 | unsigned long int *counts; | |
5226 | bfd_vma *bitmask; | |
5227 | bfd_byte *contents; | |
5228 | long int min_dynindx; | |
5229 | unsigned long int bucketcount; | |
5230 | unsigned long int symindx; | |
5231 | long int local_indx; | |
5232 | long int shift1, shift2; | |
5233 | unsigned long int mask; | |
14b1c01e | 5234 | bfd_boolean error; |
fdc90cb4 JJ |
5235 | }; |
5236 | ||
5237 | /* This function will be called though elf_link_hash_traverse to store | |
5238 | all hash value of the exported symbols in an array. */ | |
5239 | ||
5240 | static bfd_boolean | |
5241 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5242 | { | |
a50b1753 | 5243 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5244 | const char *name; |
5245 | char *p; | |
5246 | unsigned long ha; | |
5247 | char *alc = NULL; | |
5248 | ||
5249 | if (h->root.type == bfd_link_hash_warning) | |
5250 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5251 | ||
5252 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
5253 | if (h->dynindx == -1) | |
5254 | return TRUE; | |
5255 | ||
5256 | /* Ignore also local symbols and undefined symbols. */ | |
5257 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5258 | return TRUE; | |
5259 | ||
5260 | name = h->root.root.string; | |
5261 | p = strchr (name, ELF_VER_CHR); | |
5262 | if (p != NULL) | |
5263 | { | |
a50b1753 | 5264 | alc = (char *) bfd_malloc (p - name + 1); |
14b1c01e AM |
5265 | if (alc == NULL) |
5266 | { | |
5267 | s->error = TRUE; | |
5268 | return FALSE; | |
5269 | } | |
fdc90cb4 JJ |
5270 | memcpy (alc, name, p - name); |
5271 | alc[p - name] = '\0'; | |
5272 | name = alc; | |
5273 | } | |
5274 | ||
5275 | /* Compute the hash value. */ | |
5276 | ha = bfd_elf_gnu_hash (name); | |
5277 | ||
5278 | /* Store the found hash value in the array for compute_bucket_count, | |
5279 | and also for .dynsym reordering purposes. */ | |
5280 | s->hashcodes[s->nsyms] = ha; | |
5281 | s->hashval[h->dynindx] = ha; | |
5282 | ++s->nsyms; | |
5283 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5284 | s->min_dynindx = h->dynindx; | |
5285 | ||
5286 | if (alc != NULL) | |
5287 | free (alc); | |
5288 | ||
5289 | return TRUE; | |
5290 | } | |
5291 | ||
5292 | /* This function will be called though elf_link_hash_traverse to do | |
5293 | final dynaminc symbol renumbering. */ | |
5294 | ||
5295 | static bfd_boolean | |
5296 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5297 | { | |
a50b1753 | 5298 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5299 | unsigned long int bucket; |
5300 | unsigned long int val; | |
5301 | ||
5302 | if (h->root.type == bfd_link_hash_warning) | |
5303 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5304 | ||
5305 | /* Ignore indirect symbols. */ | |
5306 | if (h->dynindx == -1) | |
5307 | return TRUE; | |
5308 | ||
5309 | /* Ignore also local symbols and undefined symbols. */ | |
5310 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5311 | { | |
5312 | if (h->dynindx >= s->min_dynindx) | |
5313 | h->dynindx = s->local_indx++; | |
5314 | return TRUE; | |
5315 | } | |
5316 | ||
5317 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5318 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5319 | & ((s->maskbits >> s->shift1) - 1); | |
5320 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5321 | s->bitmask[val] | |
5322 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5323 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5324 | if (s->counts[bucket] == 1) | |
5325 | /* Last element terminates the chain. */ | |
5326 | val |= 1; | |
5327 | bfd_put_32 (s->output_bfd, val, | |
5328 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5329 | --s->counts[bucket]; | |
5330 | h->dynindx = s->indx[bucket]++; | |
5331 | return TRUE; | |
5332 | } | |
5333 | ||
5334 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5335 | ||
5336 | bfd_boolean | |
5337 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5338 | { | |
5339 | return !(h->forced_local | |
5340 | || h->root.type == bfd_link_hash_undefined | |
5341 | || h->root.type == bfd_link_hash_undefweak | |
5342 | || ((h->root.type == bfd_link_hash_defined | |
5343 | || h->root.type == bfd_link_hash_defweak) | |
5344 | && h->root.u.def.section->output_section == NULL)); | |
5345 | } | |
5346 | ||
5a580b3a AM |
5347 | /* Array used to determine the number of hash table buckets to use |
5348 | based on the number of symbols there are. If there are fewer than | |
5349 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5350 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5351 | than 32771 buckets. */ | |
5352 | ||
5353 | static const size_t elf_buckets[] = | |
5354 | { | |
5355 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5356 | 16411, 32771, 0 | |
5357 | }; | |
5358 | ||
5359 | /* Compute bucket count for hashing table. We do not use a static set | |
5360 | of possible tables sizes anymore. Instead we determine for all | |
5361 | possible reasonable sizes of the table the outcome (i.e., the | |
5362 | number of collisions etc) and choose the best solution. The | |
5363 | weighting functions are not too simple to allow the table to grow | |
5364 | without bounds. Instead one of the weighting factors is the size. | |
5365 | Therefore the result is always a good payoff between few collisions | |
5366 | (= short chain lengths) and table size. */ | |
5367 | static size_t | |
b20dd2ce | 5368 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5369 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5370 | unsigned long int nsyms, | |
5371 | int gnu_hash) | |
5a580b3a | 5372 | { |
5a580b3a | 5373 | size_t best_size = 0; |
5a580b3a | 5374 | unsigned long int i; |
5a580b3a | 5375 | |
5a580b3a AM |
5376 | /* We have a problem here. The following code to optimize the table |
5377 | size requires an integer type with more the 32 bits. If | |
5378 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5379 | #ifdef BFD_HOST_U_64_BIT | |
5380 | if (info->optimize) | |
5381 | { | |
5a580b3a AM |
5382 | size_t minsize; |
5383 | size_t maxsize; | |
5384 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5385 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5386 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5387 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5388 | unsigned long int *counts; |
d40f3da9 | 5389 | bfd_size_type amt; |
0883b6e0 | 5390 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5391 | |
5392 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5393 | that the hashing table must at least have NSYMS/4 and at most | |
5394 | 2*NSYMS buckets. */ | |
5395 | minsize = nsyms / 4; | |
5396 | if (minsize == 0) | |
5397 | minsize = 1; | |
5398 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5399 | if (gnu_hash) |
5400 | { | |
5401 | if (minsize < 2) | |
5402 | minsize = 2; | |
5403 | if ((best_size & 31) == 0) | |
5404 | ++best_size; | |
5405 | } | |
5a580b3a AM |
5406 | |
5407 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5408 | since the size could be large. */ | |
5409 | amt = maxsize; | |
5410 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5411 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5412 | if (counts == NULL) |
fdc90cb4 | 5413 | return 0; |
5a580b3a AM |
5414 | |
5415 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5416 | minimal chain length. The minor criteria is (of course) the size | |
5417 | of the table. */ | |
5418 | for (i = minsize; i < maxsize; ++i) | |
5419 | { | |
5420 | /* Walk through the array of hashcodes and count the collisions. */ | |
5421 | BFD_HOST_U_64_BIT max; | |
5422 | unsigned long int j; | |
5423 | unsigned long int fact; | |
5424 | ||
fdc90cb4 JJ |
5425 | if (gnu_hash && (i & 31) == 0) |
5426 | continue; | |
5427 | ||
5a580b3a AM |
5428 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5429 | ||
5430 | /* Determine how often each hash bucket is used. */ | |
5431 | for (j = 0; j < nsyms; ++j) | |
5432 | ++counts[hashcodes[j] % i]; | |
5433 | ||
5434 | /* For the weight function we need some information about the | |
5435 | pagesize on the target. This is information need not be 100% | |
5436 | accurate. Since this information is not available (so far) we | |
5437 | define it here to a reasonable default value. If it is crucial | |
5438 | to have a better value some day simply define this value. */ | |
5439 | # ifndef BFD_TARGET_PAGESIZE | |
5440 | # define BFD_TARGET_PAGESIZE (4096) | |
5441 | # endif | |
5442 | ||
fdc90cb4 JJ |
5443 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5444 | and the chains. */ | |
5445 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5446 | |
5447 | # if 1 | |
5448 | /* Variant 1: optimize for short chains. We add the squares | |
5449 | of all the chain lengths (which favors many small chain | |
5450 | over a few long chains). */ | |
5451 | for (j = 0; j < i; ++j) | |
5452 | max += counts[j] * counts[j]; | |
5453 | ||
5454 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5455 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5456 | max *= fact * fact; |
5457 | # else | |
5458 | /* Variant 2: Optimize a lot more for small table. Here we | |
5459 | also add squares of the size but we also add penalties for | |
5460 | empty slots (the +1 term). */ | |
5461 | for (j = 0; j < i; ++j) | |
5462 | max += (1 + counts[j]) * (1 + counts[j]); | |
5463 | ||
5464 | /* The overall size of the table is considered, but not as | |
5465 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5466 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5467 | max *= fact; |
5468 | # endif | |
5469 | ||
5470 | /* Compare with current best results. */ | |
5471 | if (max < best_chlen) | |
5472 | { | |
5473 | best_chlen = max; | |
5474 | best_size = i; | |
0883b6e0 | 5475 | no_improvement_count = 0; |
5a580b3a | 5476 | } |
0883b6e0 NC |
5477 | /* PR 11843: Avoid futile long searches for the best bucket size |
5478 | when there are a large number of symbols. */ | |
5479 | else if (++no_improvement_count == 100) | |
5480 | break; | |
5a580b3a AM |
5481 | } |
5482 | ||
5483 | free (counts); | |
5484 | } | |
5485 | else | |
5486 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5487 | { | |
5488 | /* This is the fallback solution if no 64bit type is available or if we | |
5489 | are not supposed to spend much time on optimizations. We select the | |
5490 | bucket count using a fixed set of numbers. */ | |
5491 | for (i = 0; elf_buckets[i] != 0; i++) | |
5492 | { | |
5493 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5494 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5495 | break; |
5496 | } | |
fdc90cb4 JJ |
5497 | if (gnu_hash && best_size < 2) |
5498 | best_size = 2; | |
5a580b3a AM |
5499 | } |
5500 | ||
5a580b3a AM |
5501 | return best_size; |
5502 | } | |
5503 | ||
d0bf826b AM |
5504 | /* Size any SHT_GROUP section for ld -r. */ |
5505 | ||
5506 | bfd_boolean | |
5507 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5508 | { | |
5509 | bfd *ibfd; | |
5510 | ||
5511 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
5512 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
5513 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5514 | return FALSE; | |
5515 | return TRUE; | |
5516 | } | |
5517 | ||
5a580b3a AM |
5518 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5519 | called by the ELF linker emulation before_allocation routine. We | |
5520 | must set the sizes of the sections before the linker sets the | |
5521 | addresses of the various sections. */ | |
5522 | ||
5523 | bfd_boolean | |
5524 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5525 | const char *soname, | |
5526 | const char *rpath, | |
5527 | const char *filter_shlib, | |
7ee314fa AM |
5528 | const char *audit, |
5529 | const char *depaudit, | |
5a580b3a AM |
5530 | const char * const *auxiliary_filters, |
5531 | struct bfd_link_info *info, | |
5532 | asection **sinterpptr, | |
5533 | struct bfd_elf_version_tree *verdefs) | |
5534 | { | |
5535 | bfd_size_type soname_indx; | |
5536 | bfd *dynobj; | |
5537 | const struct elf_backend_data *bed; | |
28caa186 | 5538 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5539 | |
5540 | *sinterpptr = NULL; | |
5541 | ||
5542 | soname_indx = (bfd_size_type) -1; | |
5543 | ||
5544 | if (!is_elf_hash_table (info->hash)) | |
5545 | return TRUE; | |
5546 | ||
6bfdb61b | 5547 | bed = get_elf_backend_data (output_bfd); |
5a580b3a AM |
5548 | if (info->execstack) |
5549 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; | |
5550 | else if (info->noexecstack) | |
5551 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W; | |
5552 | else | |
5553 | { | |
5554 | bfd *inputobj; | |
5555 | asection *notesec = NULL; | |
5556 | int exec = 0; | |
5557 | ||
5558 | for (inputobj = info->input_bfds; | |
5559 | inputobj; | |
5560 | inputobj = inputobj->link_next) | |
5561 | { | |
5562 | asection *s; | |
5563 | ||
a94b9d2d | 5564 | if (inputobj->flags & (DYNAMIC | EXEC_P | BFD_LINKER_CREATED)) |
5a580b3a AM |
5565 | continue; |
5566 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5567 | if (s) | |
5568 | { | |
5569 | if (s->flags & SEC_CODE) | |
5570 | exec = PF_X; | |
5571 | notesec = s; | |
5572 | } | |
6bfdb61b | 5573 | else if (bed->default_execstack) |
5a580b3a AM |
5574 | exec = PF_X; |
5575 | } | |
5576 | if (notesec) | |
5577 | { | |
5578 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | exec; | |
5579 | if (exec && info->relocatable | |
5580 | && notesec->output_section != bfd_abs_section_ptr) | |
5581 | notesec->output_section->flags |= SEC_CODE; | |
5582 | } | |
5583 | } | |
5584 | ||
5585 | /* Any syms created from now on start with -1 in | |
5586 | got.refcount/offset and plt.refcount/offset. */ | |
a6aa5195 AM |
5587 | elf_hash_table (info)->init_got_refcount |
5588 | = elf_hash_table (info)->init_got_offset; | |
5589 | elf_hash_table (info)->init_plt_refcount | |
5590 | = elf_hash_table (info)->init_plt_offset; | |
5a580b3a | 5591 | |
d0bf826b AM |
5592 | if (info->relocatable |
5593 | && !_bfd_elf_size_group_sections (info)) | |
5594 | return FALSE; | |
5595 | ||
5a580b3a AM |
5596 | /* The backend may have to create some sections regardless of whether |
5597 | we're dynamic or not. */ | |
5a580b3a AM |
5598 | if (bed->elf_backend_always_size_sections |
5599 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5600 | return FALSE; | |
5601 | ||
eb3d5f3b JB |
5602 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
5603 | return FALSE; | |
5604 | ||
5a580b3a AM |
5605 | dynobj = elf_hash_table (info)->dynobj; |
5606 | ||
5607 | /* If there were no dynamic objects in the link, there is nothing to | |
5608 | do here. */ | |
5609 | if (dynobj == NULL) | |
5610 | return TRUE; | |
5611 | ||
5a580b3a AM |
5612 | if (elf_hash_table (info)->dynamic_sections_created) |
5613 | { | |
5614 | struct elf_info_failed eif; | |
5615 | struct elf_link_hash_entry *h; | |
5616 | asection *dynstr; | |
5617 | struct bfd_elf_version_tree *t; | |
5618 | struct bfd_elf_version_expr *d; | |
046183de | 5619 | asection *s; |
5a580b3a AM |
5620 | bfd_boolean all_defined; |
5621 | ||
5622 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
5623 | BFD_ASSERT (*sinterpptr != NULL || !info->executable); | |
5624 | ||
5625 | if (soname != NULL) | |
5626 | { | |
5627 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5628 | soname, TRUE); | |
5629 | if (soname_indx == (bfd_size_type) -1 | |
5630 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
5631 | return FALSE; | |
5632 | } | |
5633 | ||
5634 | if (info->symbolic) | |
5635 | { | |
5636 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5637 | return FALSE; | |
5638 | info->flags |= DF_SYMBOLIC; | |
5639 | } | |
5640 | ||
5641 | if (rpath != NULL) | |
5642 | { | |
5643 | bfd_size_type indx; | |
5644 | ||
5645 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
5646 | TRUE); | |
5647 | if (indx == (bfd_size_type) -1 | |
5648 | || !_bfd_elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
5649 | return FALSE; | |
5650 | ||
5651 | if (info->new_dtags) | |
5652 | { | |
5653 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
5654 | if (!_bfd_elf_add_dynamic_entry (info, DT_RUNPATH, indx)) | |
5655 | return FALSE; | |
5656 | } | |
5657 | } | |
5658 | ||
5659 | if (filter_shlib != NULL) | |
5660 | { | |
5661 | bfd_size_type indx; | |
5662 | ||
5663 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5664 | filter_shlib, TRUE); | |
5665 | if (indx == (bfd_size_type) -1 | |
5666 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
5667 | return FALSE; | |
5668 | } | |
5669 | ||
5670 | if (auxiliary_filters != NULL) | |
5671 | { | |
5672 | const char * const *p; | |
5673 | ||
5674 | for (p = auxiliary_filters; *p != NULL; p++) | |
5675 | { | |
5676 | bfd_size_type indx; | |
5677 | ||
5678 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5679 | *p, TRUE); | |
5680 | if (indx == (bfd_size_type) -1 | |
5681 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
5682 | return FALSE; | |
5683 | } | |
5684 | } | |
5685 | ||
7ee314fa AM |
5686 | if (audit != NULL) |
5687 | { | |
5688 | bfd_size_type indx; | |
5689 | ||
5690 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
5691 | TRUE); | |
5692 | if (indx == (bfd_size_type) -1 | |
5693 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
5694 | return FALSE; | |
5695 | } | |
5696 | ||
5697 | if (depaudit != NULL) | |
5698 | { | |
5699 | bfd_size_type indx; | |
5700 | ||
5701 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
5702 | TRUE); | |
5703 | if (indx == (bfd_size_type) -1 | |
5704 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
5705 | return FALSE; | |
5706 | } | |
5707 | ||
5a580b3a AM |
5708 | eif.info = info; |
5709 | eif.verdefs = verdefs; | |
5710 | eif.failed = FALSE; | |
5711 | ||
5712 | /* If we are supposed to export all symbols into the dynamic symbol | |
5713 | table (this is not the normal case), then do so. */ | |
55255dae L |
5714 | if (info->export_dynamic |
5715 | || (info->executable && info->dynamic)) | |
5a580b3a AM |
5716 | { |
5717 | elf_link_hash_traverse (elf_hash_table (info), | |
5718 | _bfd_elf_export_symbol, | |
5719 | &eif); | |
5720 | if (eif.failed) | |
5721 | return FALSE; | |
5722 | } | |
5723 | ||
5724 | /* Make all global versions with definition. */ | |
5725 | for (t = verdefs; t != NULL; t = t->next) | |
5726 | for (d = t->globals.list; d != NULL; d = d->next) | |
ae5a3597 | 5727 | if (!d->symver && d->literal) |
5a580b3a AM |
5728 | { |
5729 | const char *verstr, *name; | |
5730 | size_t namelen, verlen, newlen; | |
93252b1c | 5731 | char *newname, *p, leading_char; |
5a580b3a AM |
5732 | struct elf_link_hash_entry *newh; |
5733 | ||
93252b1c | 5734 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 5735 | name = d->pattern; |
93252b1c | 5736 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
5737 | verstr = t->name; |
5738 | verlen = strlen (verstr); | |
5739 | newlen = namelen + verlen + 3; | |
5740 | ||
a50b1753 | 5741 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
5742 | if (newname == NULL) |
5743 | return FALSE; | |
93252b1c MF |
5744 | newname[0] = leading_char; |
5745 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
5746 | |
5747 | /* Check the hidden versioned definition. */ | |
5748 | p = newname + namelen; | |
5749 | *p++ = ELF_VER_CHR; | |
5750 | memcpy (p, verstr, verlen + 1); | |
5751 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5752 | newname, FALSE, FALSE, | |
5753 | FALSE); | |
5754 | if (newh == NULL | |
5755 | || (newh->root.type != bfd_link_hash_defined | |
5756 | && newh->root.type != bfd_link_hash_defweak)) | |
5757 | { | |
5758 | /* Check the default versioned definition. */ | |
5759 | *p++ = ELF_VER_CHR; | |
5760 | memcpy (p, verstr, verlen + 1); | |
5761 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5762 | newname, FALSE, FALSE, | |
5763 | FALSE); | |
5764 | } | |
5765 | free (newname); | |
5766 | ||
5767 | /* Mark this version if there is a definition and it is | |
5768 | not defined in a shared object. */ | |
5769 | if (newh != NULL | |
f5385ebf | 5770 | && !newh->def_dynamic |
5a580b3a AM |
5771 | && (newh->root.type == bfd_link_hash_defined |
5772 | || newh->root.type == bfd_link_hash_defweak)) | |
5773 | d->symver = 1; | |
5774 | } | |
5775 | ||
5776 | /* Attach all the symbols to their version information. */ | |
5a580b3a AM |
5777 | asvinfo.info = info; |
5778 | asvinfo.verdefs = verdefs; | |
5779 | asvinfo.failed = FALSE; | |
5780 | ||
5781 | elf_link_hash_traverse (elf_hash_table (info), | |
5782 | _bfd_elf_link_assign_sym_version, | |
5783 | &asvinfo); | |
5784 | if (asvinfo.failed) | |
5785 | return FALSE; | |
5786 | ||
5787 | if (!info->allow_undefined_version) | |
5788 | { | |
5789 | /* Check if all global versions have a definition. */ | |
5790 | all_defined = TRUE; | |
5791 | for (t = verdefs; t != NULL; t = t->next) | |
5792 | for (d = t->globals.list; d != NULL; d = d->next) | |
ae5a3597 | 5793 | if (d->literal && !d->symver && !d->script) |
5a580b3a AM |
5794 | { |
5795 | (*_bfd_error_handler) | |
5796 | (_("%s: undefined version: %s"), | |
5797 | d->pattern, t->name); | |
5798 | all_defined = FALSE; | |
5799 | } | |
5800 | ||
5801 | if (!all_defined) | |
5802 | { | |
5803 | bfd_set_error (bfd_error_bad_value); | |
5804 | return FALSE; | |
5805 | } | |
5806 | } | |
5807 | ||
5808 | /* Find all symbols which were defined in a dynamic object and make | |
5809 | the backend pick a reasonable value for them. */ | |
5810 | elf_link_hash_traverse (elf_hash_table (info), | |
5811 | _bfd_elf_adjust_dynamic_symbol, | |
5812 | &eif); | |
5813 | if (eif.failed) | |
5814 | return FALSE; | |
5815 | ||
5816 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 5817 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
5818 | now so that we know the final size of the .dynamic section. */ |
5819 | ||
5820 | /* If there are initialization and/or finalization functions to | |
5821 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
5822 | h = (info->init_function | |
5823 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5824 | info->init_function, FALSE, | |
5825 | FALSE, FALSE) | |
5826 | : NULL); | |
5827 | if (h != NULL | |
f5385ebf AM |
5828 | && (h->ref_regular |
5829 | || h->def_regular)) | |
5a580b3a AM |
5830 | { |
5831 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
5832 | return FALSE; | |
5833 | } | |
5834 | h = (info->fini_function | |
5835 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5836 | info->fini_function, FALSE, | |
5837 | FALSE, FALSE) | |
5838 | : NULL); | |
5839 | if (h != NULL | |
f5385ebf AM |
5840 | && (h->ref_regular |
5841 | || h->def_regular)) | |
5a580b3a AM |
5842 | { |
5843 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
5844 | return FALSE; | |
5845 | } | |
5846 | ||
046183de AM |
5847 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
5848 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5849 | { |
5850 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
5851 | if (! info->executable) | |
5852 | { | |
5853 | bfd *sub; | |
5854 | asection *o; | |
5855 | ||
5856 | for (sub = info->input_bfds; sub != NULL; | |
5857 | sub = sub->link_next) | |
3fcd97f1 JJ |
5858 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
5859 | for (o = sub->sections; o != NULL; o = o->next) | |
5860 | if (elf_section_data (o)->this_hdr.sh_type | |
5861 | == SHT_PREINIT_ARRAY) | |
5862 | { | |
5863 | (*_bfd_error_handler) | |
5864 | (_("%B: .preinit_array section is not allowed in DSO"), | |
5865 | sub); | |
5866 | break; | |
5867 | } | |
5a580b3a AM |
5868 | |
5869 | bfd_set_error (bfd_error_nonrepresentable_section); | |
5870 | return FALSE; | |
5871 | } | |
5872 | ||
5873 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
5874 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
5875 | return FALSE; | |
5876 | } | |
046183de AM |
5877 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
5878 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5879 | { |
5880 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
5881 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
5882 | return FALSE; | |
5883 | } | |
046183de AM |
5884 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
5885 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5886 | { |
5887 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
5888 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
5889 | return FALSE; | |
5890 | } | |
5891 | ||
5892 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); | |
5893 | /* If .dynstr is excluded from the link, we don't want any of | |
5894 | these tags. Strictly, we should be checking each section | |
5895 | individually; This quick check covers for the case where | |
5896 | someone does a /DISCARD/ : { *(*) }. */ | |
5897 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
5898 | { | |
5899 | bfd_size_type strsize; | |
5900 | ||
5901 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
5902 | if ((info->emit_hash |
5903 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
5904 | || (info->emit_gnu_hash | |
5905 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
5906 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
5907 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
5908 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
5909 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
5910 | bed->s->sizeof_sym)) | |
5911 | return FALSE; | |
5912 | } | |
5913 | } | |
5914 | ||
5915 | /* The backend must work out the sizes of all the other dynamic | |
5916 | sections. */ | |
5917 | if (bed->elf_backend_size_dynamic_sections | |
5918 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
5919 | return FALSE; | |
5920 | ||
5921 | if (elf_hash_table (info)->dynamic_sections_created) | |
5922 | { | |
554220db | 5923 | unsigned long section_sym_count; |
5a580b3a | 5924 | asection *s; |
5a580b3a AM |
5925 | |
5926 | /* Set up the version definition section. */ | |
5927 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
5928 | BFD_ASSERT (s != NULL); | |
5929 | ||
5930 | /* We may have created additional version definitions if we are | |
5931 | just linking a regular application. */ | |
5932 | verdefs = asvinfo.verdefs; | |
5933 | ||
5934 | /* Skip anonymous version tag. */ | |
5935 | if (verdefs != NULL && verdefs->vernum == 0) | |
5936 | verdefs = verdefs->next; | |
5937 | ||
3e3b46e5 | 5938 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 5939 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
5940 | else |
5941 | { | |
5942 | unsigned int cdefs; | |
5943 | bfd_size_type size; | |
5944 | struct bfd_elf_version_tree *t; | |
5945 | bfd_byte *p; | |
5946 | Elf_Internal_Verdef def; | |
5947 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
5948 | struct bfd_link_hash_entry *bh; |
5949 | struct elf_link_hash_entry *h; | |
5950 | const char *name; | |
5a580b3a AM |
5951 | |
5952 | cdefs = 0; | |
5953 | size = 0; | |
5954 | ||
5955 | /* Make space for the base version. */ | |
5956 | size += sizeof (Elf_External_Verdef); | |
5957 | size += sizeof (Elf_External_Verdaux); | |
5958 | ++cdefs; | |
5959 | ||
3e3b46e5 PB |
5960 | /* Make space for the default version. */ |
5961 | if (info->create_default_symver) | |
5962 | { | |
5963 | size += sizeof (Elf_External_Verdef); | |
5964 | ++cdefs; | |
5965 | } | |
5966 | ||
5a580b3a AM |
5967 | for (t = verdefs; t != NULL; t = t->next) |
5968 | { | |
5969 | struct bfd_elf_version_deps *n; | |
5970 | ||
a6cc6b3b RO |
5971 | /* Don't emit base version twice. */ |
5972 | if (t->vernum == 0) | |
5973 | continue; | |
5974 | ||
5a580b3a AM |
5975 | size += sizeof (Elf_External_Verdef); |
5976 | size += sizeof (Elf_External_Verdaux); | |
5977 | ++cdefs; | |
5978 | ||
5979 | for (n = t->deps; n != NULL; n = n->next) | |
5980 | size += sizeof (Elf_External_Verdaux); | |
5981 | } | |
5982 | ||
eea6121a | 5983 | s->size = size; |
a50b1753 | 5984 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 5985 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
5986 | return FALSE; |
5987 | ||
5988 | /* Fill in the version definition section. */ | |
5989 | ||
5990 | p = s->contents; | |
5991 | ||
5992 | def.vd_version = VER_DEF_CURRENT; | |
5993 | def.vd_flags = VER_FLG_BASE; | |
5994 | def.vd_ndx = 1; | |
5995 | def.vd_cnt = 1; | |
3e3b46e5 PB |
5996 | if (info->create_default_symver) |
5997 | { | |
5998 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
5999 | def.vd_next = sizeof (Elf_External_Verdef); | |
6000 | } | |
6001 | else | |
6002 | { | |
6003 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6004 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6005 | + sizeof (Elf_External_Verdaux)); | |
6006 | } | |
5a580b3a AM |
6007 | |
6008 | if (soname_indx != (bfd_size_type) -1) | |
6009 | { | |
6010 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6011 | soname_indx); | |
6012 | def.vd_hash = bfd_elf_hash (soname); | |
6013 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6014 | name = soname; |
5a580b3a AM |
6015 | } |
6016 | else | |
6017 | { | |
5a580b3a AM |
6018 | bfd_size_type indx; |
6019 | ||
06084812 | 6020 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6021 | def.vd_hash = bfd_elf_hash (name); |
6022 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6023 | name, FALSE); | |
6024 | if (indx == (bfd_size_type) -1) | |
6025 | return FALSE; | |
6026 | defaux.vda_name = indx; | |
6027 | } | |
6028 | defaux.vda_next = 0; | |
6029 | ||
6030 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6031 | (Elf_External_Verdef *) p); | |
6032 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6033 | if (info->create_default_symver) |
6034 | { | |
6035 | /* Add a symbol representing this version. */ | |
6036 | bh = NULL; | |
6037 | if (! (_bfd_generic_link_add_one_symbol | |
6038 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6039 | 0, NULL, FALSE, | |
6040 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6041 | return FALSE; | |
6042 | h = (struct elf_link_hash_entry *) bh; | |
6043 | h->non_elf = 0; | |
6044 | h->def_regular = 1; | |
6045 | h->type = STT_OBJECT; | |
6046 | h->verinfo.vertree = NULL; | |
6047 | ||
6048 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6049 | return FALSE; | |
6050 | ||
6051 | /* Create a duplicate of the base version with the same | |
6052 | aux block, but different flags. */ | |
6053 | def.vd_flags = 0; | |
6054 | def.vd_ndx = 2; | |
6055 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6056 | if (verdefs) | |
6057 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6058 | + sizeof (Elf_External_Verdaux)); | |
6059 | else | |
6060 | def.vd_next = 0; | |
6061 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6062 | (Elf_External_Verdef *) p); | |
6063 | p += sizeof (Elf_External_Verdef); | |
6064 | } | |
5a580b3a AM |
6065 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6066 | (Elf_External_Verdaux *) p); | |
6067 | p += sizeof (Elf_External_Verdaux); | |
6068 | ||
6069 | for (t = verdefs; t != NULL; t = t->next) | |
6070 | { | |
6071 | unsigned int cdeps; | |
6072 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6073 | |
a6cc6b3b RO |
6074 | /* Don't emit the base version twice. */ |
6075 | if (t->vernum == 0) | |
6076 | continue; | |
6077 | ||
5a580b3a AM |
6078 | cdeps = 0; |
6079 | for (n = t->deps; n != NULL; n = n->next) | |
6080 | ++cdeps; | |
6081 | ||
6082 | /* Add a symbol representing this version. */ | |
6083 | bh = NULL; | |
6084 | if (! (_bfd_generic_link_add_one_symbol | |
6085 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6086 | 0, NULL, FALSE, | |
6087 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6088 | return FALSE; | |
6089 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6090 | h->non_elf = 0; |
6091 | h->def_regular = 1; | |
5a580b3a AM |
6092 | h->type = STT_OBJECT; |
6093 | h->verinfo.vertree = t; | |
6094 | ||
c152c796 | 6095 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6096 | return FALSE; |
6097 | ||
6098 | def.vd_version = VER_DEF_CURRENT; | |
6099 | def.vd_flags = 0; | |
6100 | if (t->globals.list == NULL | |
6101 | && t->locals.list == NULL | |
6102 | && ! t->used) | |
6103 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6104 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6105 | def.vd_cnt = cdeps + 1; |
6106 | def.vd_hash = bfd_elf_hash (t->name); | |
6107 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6108 | def.vd_next = 0; | |
a6cc6b3b RO |
6109 | |
6110 | /* If a basever node is next, it *must* be the last node in | |
6111 | the chain, otherwise Verdef construction breaks. */ | |
6112 | if (t->next != NULL && t->next->vernum == 0) | |
6113 | BFD_ASSERT (t->next->next == NULL); | |
6114 | ||
6115 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6116 | def.vd_next = (sizeof (Elf_External_Verdef) |
6117 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6118 | ||
6119 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6120 | (Elf_External_Verdef *) p); | |
6121 | p += sizeof (Elf_External_Verdef); | |
6122 | ||
6123 | defaux.vda_name = h->dynstr_index; | |
6124 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6125 | h->dynstr_index); | |
6126 | defaux.vda_next = 0; | |
6127 | if (t->deps != NULL) | |
6128 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6129 | t->name_indx = defaux.vda_name; | |
6130 | ||
6131 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6132 | (Elf_External_Verdaux *) p); | |
6133 | p += sizeof (Elf_External_Verdaux); | |
6134 | ||
6135 | for (n = t->deps; n != NULL; n = n->next) | |
6136 | { | |
6137 | if (n->version_needed == NULL) | |
6138 | { | |
6139 | /* This can happen if there was an error in the | |
6140 | version script. */ | |
6141 | defaux.vda_name = 0; | |
6142 | } | |
6143 | else | |
6144 | { | |
6145 | defaux.vda_name = n->version_needed->name_indx; | |
6146 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6147 | defaux.vda_name); | |
6148 | } | |
6149 | if (n->next == NULL) | |
6150 | defaux.vda_next = 0; | |
6151 | else | |
6152 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6153 | ||
6154 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6155 | (Elf_External_Verdaux *) p); | |
6156 | p += sizeof (Elf_External_Verdaux); | |
6157 | } | |
6158 | } | |
6159 | ||
6160 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6161 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6162 | return FALSE; | |
6163 | ||
6164 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6165 | } | |
6166 | ||
6167 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6168 | { | |
6169 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6170 | return FALSE; | |
6171 | } | |
6172 | else if (info->flags & DF_BIND_NOW) | |
6173 | { | |
6174 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6175 | return FALSE; | |
6176 | } | |
6177 | ||
6178 | if (info->flags_1) | |
6179 | { | |
6180 | if (info->executable) | |
6181 | info->flags_1 &= ~ (DF_1_INITFIRST | |
6182 | | DF_1_NODELETE | |
6183 | | DF_1_NOOPEN); | |
6184 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6185 | return FALSE; | |
6186 | } | |
6187 | ||
6188 | /* Work out the size of the version reference section. */ | |
6189 | ||
6190 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
6191 | BFD_ASSERT (s != NULL); | |
6192 | { | |
6193 | struct elf_find_verdep_info sinfo; | |
6194 | ||
5a580b3a AM |
6195 | sinfo.info = info; |
6196 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6197 | if (sinfo.vers == 0) | |
6198 | sinfo.vers = 1; | |
6199 | sinfo.failed = FALSE; | |
6200 | ||
6201 | elf_link_hash_traverse (elf_hash_table (info), | |
6202 | _bfd_elf_link_find_version_dependencies, | |
6203 | &sinfo); | |
14b1c01e AM |
6204 | if (sinfo.failed) |
6205 | return FALSE; | |
5a580b3a AM |
6206 | |
6207 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6208 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6209 | else |
6210 | { | |
6211 | Elf_Internal_Verneed *t; | |
6212 | unsigned int size; | |
6213 | unsigned int crefs; | |
6214 | bfd_byte *p; | |
6215 | ||
a6cc6b3b | 6216 | /* Build the version dependency section. */ |
5a580b3a AM |
6217 | size = 0; |
6218 | crefs = 0; | |
6219 | for (t = elf_tdata (output_bfd)->verref; | |
6220 | t != NULL; | |
6221 | t = t->vn_nextref) | |
6222 | { | |
6223 | Elf_Internal_Vernaux *a; | |
6224 | ||
6225 | size += sizeof (Elf_External_Verneed); | |
6226 | ++crefs; | |
6227 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6228 | size += sizeof (Elf_External_Vernaux); | |
6229 | } | |
6230 | ||
eea6121a | 6231 | s->size = size; |
a50b1753 | 6232 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6233 | if (s->contents == NULL) |
6234 | return FALSE; | |
6235 | ||
6236 | p = s->contents; | |
6237 | for (t = elf_tdata (output_bfd)->verref; | |
6238 | t != NULL; | |
6239 | t = t->vn_nextref) | |
6240 | { | |
6241 | unsigned int caux; | |
6242 | Elf_Internal_Vernaux *a; | |
6243 | bfd_size_type indx; | |
6244 | ||
6245 | caux = 0; | |
6246 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6247 | ++caux; | |
6248 | ||
6249 | t->vn_version = VER_NEED_CURRENT; | |
6250 | t->vn_cnt = caux; | |
6251 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6252 | elf_dt_name (t->vn_bfd) != NULL | |
6253 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6254 | : lbasename (t->vn_bfd->filename), |
5a580b3a AM |
6255 | FALSE); |
6256 | if (indx == (bfd_size_type) -1) | |
6257 | return FALSE; | |
6258 | t->vn_file = indx; | |
6259 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6260 | if (t->vn_nextref == NULL) | |
6261 | t->vn_next = 0; | |
6262 | else | |
6263 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6264 | + caux * sizeof (Elf_External_Vernaux)); | |
6265 | ||
6266 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6267 | (Elf_External_Verneed *) p); | |
6268 | p += sizeof (Elf_External_Verneed); | |
6269 | ||
6270 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6271 | { | |
6272 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6273 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6274 | a->vna_nodename, FALSE); | |
6275 | if (indx == (bfd_size_type) -1) | |
6276 | return FALSE; | |
6277 | a->vna_name = indx; | |
6278 | if (a->vna_nextptr == NULL) | |
6279 | a->vna_next = 0; | |
6280 | else | |
6281 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6282 | ||
6283 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6284 | (Elf_External_Vernaux *) p); | |
6285 | p += sizeof (Elf_External_Vernaux); | |
6286 | } | |
6287 | } | |
6288 | ||
6289 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6290 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6291 | return FALSE; | |
6292 | ||
6293 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6294 | } | |
6295 | } | |
6296 | ||
8423293d AM |
6297 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6298 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6299 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6300 | §ion_sym_count) == 0) | |
6301 | { | |
6302 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
6303 | s->flags |= SEC_EXCLUDE; | |
6304 | } | |
6305 | } | |
6306 | return TRUE; | |
6307 | } | |
6308 | ||
74541ad4 AM |
6309 | /* Find the first non-excluded output section. We'll use its |
6310 | section symbol for some emitted relocs. */ | |
6311 | void | |
6312 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6313 | { | |
6314 | asection *s; | |
6315 | ||
6316 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6317 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6318 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6319 | { | |
6320 | elf_hash_table (info)->text_index_section = s; | |
6321 | break; | |
6322 | } | |
6323 | } | |
6324 | ||
6325 | /* Find two non-excluded output sections, one for code, one for data. | |
6326 | We'll use their section symbols for some emitted relocs. */ | |
6327 | void | |
6328 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6329 | { | |
6330 | asection *s; | |
6331 | ||
266b05cf DJ |
6332 | /* Data first, since setting text_index_section changes |
6333 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6334 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6335 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6336 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6337 | { | |
266b05cf | 6338 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6339 | break; |
6340 | } | |
6341 | ||
6342 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6343 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6344 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6345 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6346 | { | |
266b05cf | 6347 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6348 | break; |
6349 | } | |
6350 | ||
6351 | if (elf_hash_table (info)->text_index_section == NULL) | |
6352 | elf_hash_table (info)->text_index_section | |
6353 | = elf_hash_table (info)->data_index_section; | |
6354 | } | |
6355 | ||
8423293d AM |
6356 | bfd_boolean |
6357 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6358 | { | |
74541ad4 AM |
6359 | const struct elf_backend_data *bed; |
6360 | ||
8423293d AM |
6361 | if (!is_elf_hash_table (info->hash)) |
6362 | return TRUE; | |
6363 | ||
74541ad4 AM |
6364 | bed = get_elf_backend_data (output_bfd); |
6365 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6366 | ||
8423293d AM |
6367 | if (elf_hash_table (info)->dynamic_sections_created) |
6368 | { | |
6369 | bfd *dynobj; | |
8423293d AM |
6370 | asection *s; |
6371 | bfd_size_type dynsymcount; | |
6372 | unsigned long section_sym_count; | |
8423293d AM |
6373 | unsigned int dtagcount; |
6374 | ||
6375 | dynobj = elf_hash_table (info)->dynobj; | |
6376 | ||
5a580b3a AM |
6377 | /* Assign dynsym indicies. In a shared library we generate a |
6378 | section symbol for each output section, which come first. | |
6379 | Next come all of the back-end allocated local dynamic syms, | |
6380 | followed by the rest of the global symbols. */ | |
6381 | ||
554220db AM |
6382 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6383 | §ion_sym_count); | |
5a580b3a AM |
6384 | |
6385 | /* Work out the size of the symbol version section. */ | |
6386 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
6387 | BFD_ASSERT (s != NULL); | |
8423293d AM |
6388 | if (dynsymcount != 0 |
6389 | && (s->flags & SEC_EXCLUDE) == 0) | |
5a580b3a | 6390 | { |
eea6121a | 6391 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6392 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6393 | if (s->contents == NULL) |
6394 | return FALSE; | |
6395 | ||
6396 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6397 | return FALSE; | |
6398 | } | |
6399 | ||
6400 | /* Set the size of the .dynsym and .hash sections. We counted | |
6401 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6402 | We will build the contents of .dynsym and .hash when we build | |
6403 | the final symbol table, because until then we do not know the | |
6404 | correct value to give the symbols. We built the .dynstr | |
6405 | section as we went along in elf_link_add_object_symbols. */ | |
6406 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
6407 | BFD_ASSERT (s != NULL); | |
eea6121a | 6408 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a AM |
6409 | |
6410 | if (dynsymcount != 0) | |
6411 | { | |
a50b1753 | 6412 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
554220db AM |
6413 | if (s->contents == NULL) |
6414 | return FALSE; | |
5a580b3a | 6415 | |
554220db AM |
6416 | /* The first entry in .dynsym is a dummy symbol. |
6417 | Clear all the section syms, in case we don't output them all. */ | |
6418 | ++section_sym_count; | |
6419 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a AM |
6420 | } |
6421 | ||
fdc90cb4 JJ |
6422 | elf_hash_table (info)->bucketcount = 0; |
6423 | ||
5a580b3a AM |
6424 | /* Compute the size of the hashing table. As a side effect this |
6425 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6426 | if (info->emit_hash) |
6427 | { | |
6428 | unsigned long int *hashcodes; | |
14b1c01e | 6429 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6430 | bfd_size_type amt; |
6431 | unsigned long int nsyms; | |
6432 | size_t bucketcount; | |
6433 | size_t hash_entry_size; | |
6434 | ||
6435 | /* Compute the hash values for all exported symbols. At the same | |
6436 | time store the values in an array so that we could use them for | |
6437 | optimizations. */ | |
6438 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6439 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6440 | if (hashcodes == NULL) |
6441 | return FALSE; | |
14b1c01e AM |
6442 | hashinf.hashcodes = hashcodes; |
6443 | hashinf.error = FALSE; | |
5a580b3a | 6444 | |
fdc90cb4 JJ |
6445 | /* Put all hash values in HASHCODES. */ |
6446 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6447 | elf_collect_hash_codes, &hashinf); |
6448 | if (hashinf.error) | |
4dd07732 AM |
6449 | { |
6450 | free (hashcodes); | |
6451 | return FALSE; | |
6452 | } | |
5a580b3a | 6453 | |
14b1c01e | 6454 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6455 | bucketcount |
6456 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6457 | free (hashcodes); | |
6458 | ||
6459 | if (bucketcount == 0) | |
6460 | return FALSE; | |
5a580b3a | 6461 | |
fdc90cb4 JJ |
6462 | elf_hash_table (info)->bucketcount = bucketcount; |
6463 | ||
6464 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
6465 | BFD_ASSERT (s != NULL); | |
6466 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6467 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6468 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6469 | if (s->contents == NULL) |
6470 | return FALSE; | |
6471 | ||
6472 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6473 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6474 | s->contents + hash_entry_size); | |
6475 | } | |
6476 | ||
6477 | if (info->emit_gnu_hash) | |
6478 | { | |
6479 | size_t i, cnt; | |
6480 | unsigned char *contents; | |
6481 | struct collect_gnu_hash_codes cinfo; | |
6482 | bfd_size_type amt; | |
6483 | size_t bucketcount; | |
6484 | ||
6485 | memset (&cinfo, 0, sizeof (cinfo)); | |
6486 | ||
6487 | /* Compute the hash values for all exported symbols. At the same | |
6488 | time store the values in an array so that we could use them for | |
6489 | optimizations. */ | |
6490 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6491 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6492 | if (cinfo.hashcodes == NULL) |
6493 | return FALSE; | |
6494 | ||
6495 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6496 | cinfo.min_dynindx = -1; | |
6497 | cinfo.output_bfd = output_bfd; | |
6498 | cinfo.bed = bed; | |
6499 | ||
6500 | /* Put all hash values in HASHCODES. */ | |
6501 | elf_link_hash_traverse (elf_hash_table (info), | |
6502 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6503 | if (cinfo.error) |
4dd07732 AM |
6504 | { |
6505 | free (cinfo.hashcodes); | |
6506 | return FALSE; | |
6507 | } | |
fdc90cb4 JJ |
6508 | |
6509 | bucketcount | |
6510 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6511 | ||
6512 | if (bucketcount == 0) | |
6513 | { | |
6514 | free (cinfo.hashcodes); | |
6515 | return FALSE; | |
6516 | } | |
6517 | ||
6518 | s = bfd_get_section_by_name (dynobj, ".gnu.hash"); | |
6519 | BFD_ASSERT (s != NULL); | |
6520 | ||
6521 | if (cinfo.nsyms == 0) | |
6522 | { | |
6523 | /* Empty .gnu.hash section is special. */ | |
6524 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6525 | free (cinfo.hashcodes); | |
6526 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6527 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6528 | if (contents == NULL) |
6529 | return FALSE; | |
6530 | s->contents = contents; | |
6531 | /* 1 empty bucket. */ | |
6532 | bfd_put_32 (output_bfd, 1, contents); | |
6533 | /* SYMIDX above the special symbol 0. */ | |
6534 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6535 | /* Just one word for bitmask. */ | |
6536 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6537 | /* Only hash fn bloom filter. */ | |
6538 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6539 | /* No hashes are valid - empty bitmask. */ | |
6540 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6541 | /* No hashes in the only bucket. */ | |
6542 | bfd_put_32 (output_bfd, 0, | |
6543 | contents + 16 + bed->s->arch_size / 8); | |
6544 | } | |
6545 | else | |
6546 | { | |
9e6619e2 | 6547 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6548 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6549 | |
9e6619e2 AM |
6550 | x = cinfo.nsyms; |
6551 | maskbitslog2 = 1; | |
6552 | while ((x >>= 1) != 0) | |
6553 | ++maskbitslog2; | |
fdc90cb4 JJ |
6554 | if (maskbitslog2 < 3) |
6555 | maskbitslog2 = 5; | |
6556 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6557 | maskbitslog2 = maskbitslog2 + 3; | |
6558 | else | |
6559 | maskbitslog2 = maskbitslog2 + 2; | |
6560 | if (bed->s->arch_size == 64) | |
6561 | { | |
6562 | if (maskbitslog2 == 5) | |
6563 | maskbitslog2 = 6; | |
6564 | cinfo.shift1 = 6; | |
6565 | } | |
6566 | else | |
6567 | cinfo.shift1 = 5; | |
6568 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6569 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6570 | cinfo.maskbits = 1 << maskbitslog2; |
6571 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6572 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6573 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6574 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6575 | if (cinfo.bitmask == NULL) |
6576 | { | |
6577 | free (cinfo.hashcodes); | |
6578 | return FALSE; | |
6579 | } | |
6580 | ||
a50b1753 | 6581 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6582 | cinfo.indx = cinfo.counts + bucketcount; |
6583 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6584 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6585 | ||
6586 | /* Determine how often each hash bucket is used. */ | |
6587 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6588 | for (i = 0; i < cinfo.nsyms; ++i) | |
6589 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6590 | ||
6591 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6592 | if (cinfo.counts[i] != 0) | |
6593 | { | |
6594 | cinfo.indx[i] = cnt; | |
6595 | cnt += cinfo.counts[i]; | |
6596 | } | |
6597 | BFD_ASSERT (cnt == dynsymcount); | |
6598 | cinfo.bucketcount = bucketcount; | |
6599 | cinfo.local_indx = cinfo.min_dynindx; | |
6600 | ||
6601 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6602 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6603 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6604 | if (contents == NULL) |
6605 | { | |
6606 | free (cinfo.bitmask); | |
6607 | free (cinfo.hashcodes); | |
6608 | return FALSE; | |
6609 | } | |
6610 | ||
6611 | s->contents = contents; | |
6612 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6613 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6614 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6615 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6616 | contents += 16 + cinfo.maskbits / 8; | |
6617 | ||
6618 | for (i = 0; i < bucketcount; ++i) | |
6619 | { | |
6620 | if (cinfo.counts[i] == 0) | |
6621 | bfd_put_32 (output_bfd, 0, contents); | |
6622 | else | |
6623 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6624 | contents += 4; | |
6625 | } | |
6626 | ||
6627 | cinfo.contents = contents; | |
6628 | ||
6629 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6630 | elf_link_hash_traverse (elf_hash_table (info), | |
6631 | elf_renumber_gnu_hash_syms, &cinfo); | |
6632 | ||
6633 | contents = s->contents + 16; | |
6634 | for (i = 0; i < maskwords; ++i) | |
6635 | { | |
6636 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6637 | contents); | |
6638 | contents += bed->s->arch_size / 8; | |
6639 | } | |
6640 | ||
6641 | free (cinfo.bitmask); | |
6642 | free (cinfo.hashcodes); | |
6643 | } | |
6644 | } | |
5a580b3a AM |
6645 | |
6646 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
6647 | BFD_ASSERT (s != NULL); | |
6648 | ||
4ad4eba5 | 6649 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 6650 | |
eea6121a | 6651 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
6652 | |
6653 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
6654 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
6655 | return FALSE; | |
6656 | } | |
6657 | ||
6658 | return TRUE; | |
6659 | } | |
4d269e42 AM |
6660 | \f |
6661 | /* Indicate that we are only retrieving symbol values from this | |
6662 | section. */ | |
6663 | ||
6664 | void | |
6665 | _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info) | |
6666 | { | |
6667 | if (is_elf_hash_table (info->hash)) | |
6668 | sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS; | |
6669 | _bfd_generic_link_just_syms (sec, info); | |
6670 | } | |
6671 | ||
6672 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ | |
6673 | ||
6674 | static void | |
6675 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
6676 | asection *sec) | |
6677 | { | |
6678 | BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE); | |
6679 | sec->sec_info_type = ELF_INFO_TYPE_NONE; | |
6680 | } | |
6681 | ||
6682 | /* Finish SHF_MERGE section merging. */ | |
6683 | ||
6684 | bfd_boolean | |
6685 | _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info) | |
6686 | { | |
6687 | bfd *ibfd; | |
6688 | asection *sec; | |
6689 | ||
6690 | if (!is_elf_hash_table (info->hash)) | |
6691 | return FALSE; | |
6692 | ||
6693 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
6694 | if ((ibfd->flags & DYNAMIC) == 0) | |
6695 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
6696 | if ((sec->flags & SEC_MERGE) != 0 | |
6697 | && !bfd_is_abs_section (sec->output_section)) | |
6698 | { | |
6699 | struct bfd_elf_section_data *secdata; | |
6700 | ||
6701 | secdata = elf_section_data (sec); | |
6702 | if (! _bfd_add_merge_section (abfd, | |
6703 | &elf_hash_table (info)->merge_info, | |
6704 | sec, &secdata->sec_info)) | |
6705 | return FALSE; | |
6706 | else if (secdata->sec_info) | |
6707 | sec->sec_info_type = ELF_INFO_TYPE_MERGE; | |
6708 | } | |
6709 | ||
6710 | if (elf_hash_table (info)->merge_info != NULL) | |
6711 | _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info, | |
6712 | merge_sections_remove_hook); | |
6713 | return TRUE; | |
6714 | } | |
6715 | ||
6716 | /* Create an entry in an ELF linker hash table. */ | |
6717 | ||
6718 | struct bfd_hash_entry * | |
6719 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
6720 | struct bfd_hash_table *table, | |
6721 | const char *string) | |
6722 | { | |
6723 | /* Allocate the structure if it has not already been allocated by a | |
6724 | subclass. */ | |
6725 | if (entry == NULL) | |
6726 | { | |
a50b1753 NC |
6727 | entry = (struct bfd_hash_entry *) |
6728 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); | |
4d269e42 AM |
6729 | if (entry == NULL) |
6730 | return entry; | |
6731 | } | |
6732 | ||
6733 | /* Call the allocation method of the superclass. */ | |
6734 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
6735 | if (entry != NULL) | |
6736 | { | |
6737 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
6738 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
6739 | ||
6740 | /* Set local fields. */ | |
6741 | ret->indx = -1; | |
6742 | ret->dynindx = -1; | |
6743 | ret->got = htab->init_got_refcount; | |
6744 | ret->plt = htab->init_plt_refcount; | |
6745 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
6746 | - offsetof (struct elf_link_hash_entry, size))); | |
6747 | /* Assume that we have been called by a non-ELF symbol reader. | |
6748 | This flag is then reset by the code which reads an ELF input | |
6749 | file. This ensures that a symbol created by a non-ELF symbol | |
6750 | reader will have the flag set correctly. */ | |
6751 | ret->non_elf = 1; | |
6752 | } | |
6753 | ||
6754 | return entry; | |
6755 | } | |
6756 | ||
6757 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
6758 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
6759 | ||
6760 | void | |
6761 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
6762 | struct elf_link_hash_entry *dir, | |
6763 | struct elf_link_hash_entry *ind) | |
6764 | { | |
6765 | struct elf_link_hash_table *htab; | |
6766 | ||
6767 | /* Copy down any references that we may have already seen to the | |
6768 | symbol which just became indirect. */ | |
6769 | ||
6770 | dir->ref_dynamic |= ind->ref_dynamic; | |
6771 | dir->ref_regular |= ind->ref_regular; | |
6772 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
6773 | dir->non_got_ref |= ind->non_got_ref; | |
6774 | dir->needs_plt |= ind->needs_plt; | |
6775 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
6776 | ||
6777 | if (ind->root.type != bfd_link_hash_indirect) | |
6778 | return; | |
6779 | ||
6780 | /* Copy over the global and procedure linkage table refcount entries. | |
6781 | These may have been already set up by a check_relocs routine. */ | |
6782 | htab = elf_hash_table (info); | |
6783 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
6784 | { | |
6785 | if (dir->got.refcount < 0) | |
6786 | dir->got.refcount = 0; | |
6787 | dir->got.refcount += ind->got.refcount; | |
6788 | ind->got.refcount = htab->init_got_refcount.refcount; | |
6789 | } | |
6790 | ||
6791 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
6792 | { | |
6793 | if (dir->plt.refcount < 0) | |
6794 | dir->plt.refcount = 0; | |
6795 | dir->plt.refcount += ind->plt.refcount; | |
6796 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
6797 | } | |
6798 | ||
6799 | if (ind->dynindx != -1) | |
6800 | { | |
6801 | if (dir->dynindx != -1) | |
6802 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
6803 | dir->dynindx = ind->dynindx; | |
6804 | dir->dynstr_index = ind->dynstr_index; | |
6805 | ind->dynindx = -1; | |
6806 | ind->dynstr_index = 0; | |
6807 | } | |
6808 | } | |
6809 | ||
6810 | void | |
6811 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
6812 | struct elf_link_hash_entry *h, | |
6813 | bfd_boolean force_local) | |
6814 | { | |
3aa14d16 L |
6815 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
6816 | if (h->type != STT_GNU_IFUNC) | |
6817 | { | |
6818 | h->plt = elf_hash_table (info)->init_plt_offset; | |
6819 | h->needs_plt = 0; | |
6820 | } | |
4d269e42 AM |
6821 | if (force_local) |
6822 | { | |
6823 | h->forced_local = 1; | |
6824 | if (h->dynindx != -1) | |
6825 | { | |
6826 | h->dynindx = -1; | |
6827 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
6828 | h->dynstr_index); | |
6829 | } | |
6830 | } | |
6831 | } | |
6832 | ||
6833 | /* Initialize an ELF linker hash table. */ | |
6834 | ||
6835 | bfd_boolean | |
6836 | _bfd_elf_link_hash_table_init | |
6837 | (struct elf_link_hash_table *table, | |
6838 | bfd *abfd, | |
6839 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
6840 | struct bfd_hash_table *, | |
6841 | const char *), | |
4dfe6ac6 NC |
6842 | unsigned int entsize, |
6843 | enum elf_target_id target_id) | |
4d269e42 AM |
6844 | { |
6845 | bfd_boolean ret; | |
6846 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
6847 | ||
6848 | memset (table, 0, sizeof * table); | |
6849 | table->init_got_refcount.refcount = can_refcount - 1; | |
6850 | table->init_plt_refcount.refcount = can_refcount - 1; | |
6851 | table->init_got_offset.offset = -(bfd_vma) 1; | |
6852 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
6853 | /* The first dynamic symbol is a dummy. */ | |
6854 | table->dynsymcount = 1; | |
6855 | ||
6856 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 6857 | |
4d269e42 | 6858 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 6859 | table->hash_table_id = target_id; |
4d269e42 AM |
6860 | |
6861 | return ret; | |
6862 | } | |
6863 | ||
6864 | /* Create an ELF linker hash table. */ | |
6865 | ||
6866 | struct bfd_link_hash_table * | |
6867 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
6868 | { | |
6869 | struct elf_link_hash_table *ret; | |
6870 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
6871 | ||
a50b1753 | 6872 | ret = (struct elf_link_hash_table *) bfd_malloc (amt); |
4d269e42 AM |
6873 | if (ret == NULL) |
6874 | return NULL; | |
6875 | ||
6876 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
6877 | sizeof (struct elf_link_hash_entry), |
6878 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
6879 | { |
6880 | free (ret); | |
6881 | return NULL; | |
6882 | } | |
6883 | ||
6884 | return &ret->root; | |
6885 | } | |
6886 | ||
6887 | /* This is a hook for the ELF emulation code in the generic linker to | |
6888 | tell the backend linker what file name to use for the DT_NEEDED | |
6889 | entry for a dynamic object. */ | |
6890 | ||
6891 | void | |
6892 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
6893 | { | |
6894 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6895 | && bfd_get_format (abfd) == bfd_object) | |
6896 | elf_dt_name (abfd) = name; | |
6897 | } | |
6898 | ||
6899 | int | |
6900 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
6901 | { | |
6902 | int lib_class; | |
6903 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6904 | && bfd_get_format (abfd) == bfd_object) | |
6905 | lib_class = elf_dyn_lib_class (abfd); | |
6906 | else | |
6907 | lib_class = 0; | |
6908 | return lib_class; | |
6909 | } | |
6910 | ||
6911 | void | |
6912 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
6913 | { | |
6914 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6915 | && bfd_get_format (abfd) == bfd_object) | |
6916 | elf_dyn_lib_class (abfd) = lib_class; | |
6917 | } | |
6918 | ||
6919 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
6920 | the linker ELF emulation code. */ | |
6921 | ||
6922 | struct bfd_link_needed_list * | |
6923 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
6924 | struct bfd_link_info *info) | |
6925 | { | |
6926 | if (! is_elf_hash_table (info->hash)) | |
6927 | return NULL; | |
6928 | return elf_hash_table (info)->needed; | |
6929 | } | |
6930 | ||
6931 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
6932 | hook for the linker ELF emulation code. */ | |
6933 | ||
6934 | struct bfd_link_needed_list * | |
6935 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
6936 | struct bfd_link_info *info) | |
6937 | { | |
6938 | if (! is_elf_hash_table (info->hash)) | |
6939 | return NULL; | |
6940 | return elf_hash_table (info)->runpath; | |
6941 | } | |
6942 | ||
6943 | /* Get the name actually used for a dynamic object for a link. This | |
6944 | is the SONAME entry if there is one. Otherwise, it is the string | |
6945 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
6946 | ||
6947 | const char * | |
6948 | bfd_elf_get_dt_soname (bfd *abfd) | |
6949 | { | |
6950 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6951 | && bfd_get_format (abfd) == bfd_object) | |
6952 | return elf_dt_name (abfd); | |
6953 | return NULL; | |
6954 | } | |
6955 | ||
6956 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
6957 | the ELF linker emulation code. */ | |
6958 | ||
6959 | bfd_boolean | |
6960 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
6961 | struct bfd_link_needed_list **pneeded) | |
6962 | { | |
6963 | asection *s; | |
6964 | bfd_byte *dynbuf = NULL; | |
cb33740c | 6965 | unsigned int elfsec; |
4d269e42 AM |
6966 | unsigned long shlink; |
6967 | bfd_byte *extdyn, *extdynend; | |
6968 | size_t extdynsize; | |
6969 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
6970 | ||
6971 | *pneeded = NULL; | |
6972 | ||
6973 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
6974 | || bfd_get_format (abfd) != bfd_object) | |
6975 | return TRUE; | |
6976 | ||
6977 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
6978 | if (s == NULL || s->size == 0) | |
6979 | return TRUE; | |
6980 | ||
6981 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
6982 | goto error_return; | |
6983 | ||
6984 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 6985 | if (elfsec == SHN_BAD) |
4d269e42 AM |
6986 | goto error_return; |
6987 | ||
6988 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 6989 | |
4d269e42 AM |
6990 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
6991 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
6992 | ||
6993 | extdyn = dynbuf; | |
6994 | extdynend = extdyn + s->size; | |
6995 | for (; extdyn < extdynend; extdyn += extdynsize) | |
6996 | { | |
6997 | Elf_Internal_Dyn dyn; | |
6998 | ||
6999 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7000 | ||
7001 | if (dyn.d_tag == DT_NULL) | |
7002 | break; | |
7003 | ||
7004 | if (dyn.d_tag == DT_NEEDED) | |
7005 | { | |
7006 | const char *string; | |
7007 | struct bfd_link_needed_list *l; | |
7008 | unsigned int tagv = dyn.d_un.d_val; | |
7009 | bfd_size_type amt; | |
7010 | ||
7011 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7012 | if (string == NULL) | |
7013 | goto error_return; | |
7014 | ||
7015 | amt = sizeof *l; | |
a50b1753 | 7016 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7017 | if (l == NULL) |
7018 | goto error_return; | |
7019 | ||
7020 | l->by = abfd; | |
7021 | l->name = string; | |
7022 | l->next = *pneeded; | |
7023 | *pneeded = l; | |
7024 | } | |
7025 | } | |
7026 | ||
7027 | free (dynbuf); | |
7028 | ||
7029 | return TRUE; | |
7030 | ||
7031 | error_return: | |
7032 | if (dynbuf != NULL) | |
7033 | free (dynbuf); | |
7034 | return FALSE; | |
7035 | } | |
7036 | ||
7037 | struct elf_symbuf_symbol | |
7038 | { | |
7039 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7040 | unsigned char st_info; /* Type and binding attributes */ | |
7041 | unsigned char st_other; /* Visibilty, and target specific */ | |
7042 | }; | |
7043 | ||
7044 | struct elf_symbuf_head | |
7045 | { | |
7046 | struct elf_symbuf_symbol *ssym; | |
7047 | bfd_size_type count; | |
7048 | unsigned int st_shndx; | |
7049 | }; | |
7050 | ||
7051 | struct elf_symbol | |
7052 | { | |
7053 | union | |
7054 | { | |
7055 | Elf_Internal_Sym *isym; | |
7056 | struct elf_symbuf_symbol *ssym; | |
7057 | } u; | |
7058 | const char *name; | |
7059 | }; | |
7060 | ||
7061 | /* Sort references to symbols by ascending section number. */ | |
7062 | ||
7063 | static int | |
7064 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7065 | { | |
7066 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7067 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7068 | ||
7069 | return s1->st_shndx - s2->st_shndx; | |
7070 | } | |
7071 | ||
7072 | static int | |
7073 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7074 | { | |
7075 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7076 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7077 | return strcmp (s1->name, s2->name); | |
7078 | } | |
7079 | ||
7080 | static struct elf_symbuf_head * | |
7081 | elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf) | |
7082 | { | |
14b1c01e | 7083 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7084 | struct elf_symbuf_symbol *ssym; |
7085 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
3ae181ee | 7086 | bfd_size_type i, shndx_count, total_size; |
4d269e42 | 7087 | |
a50b1753 | 7088 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7089 | if (indbuf == NULL) |
7090 | return NULL; | |
7091 | ||
7092 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7093 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7094 | *ind++ = &isymbuf[i]; | |
7095 | indbufend = ind; | |
7096 | ||
7097 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7098 | elf_sort_elf_symbol); | |
7099 | ||
7100 | shndx_count = 0; | |
7101 | if (indbufend > indbuf) | |
7102 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7103 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7104 | shndx_count++; | |
7105 | ||
3ae181ee L |
7106 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7107 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7108 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7109 | if (ssymbuf == NULL) |
7110 | { | |
7111 | free (indbuf); | |
7112 | return NULL; | |
7113 | } | |
7114 | ||
3ae181ee | 7115 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7116 | ssymbuf->ssym = NULL; |
7117 | ssymbuf->count = shndx_count; | |
7118 | ssymbuf->st_shndx = 0; | |
7119 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7120 | { | |
7121 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7122 | { | |
7123 | ssymhead++; | |
7124 | ssymhead->ssym = ssym; | |
7125 | ssymhead->count = 0; | |
7126 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7127 | } | |
7128 | ssym->st_name = (*ind)->st_name; | |
7129 | ssym->st_info = (*ind)->st_info; | |
7130 | ssym->st_other = (*ind)->st_other; | |
7131 | ssymhead->count++; | |
7132 | } | |
3ae181ee L |
7133 | BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count |
7134 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) | |
7135 | == total_size)); | |
4d269e42 AM |
7136 | |
7137 | free (indbuf); | |
7138 | return ssymbuf; | |
7139 | } | |
7140 | ||
7141 | /* Check if 2 sections define the same set of local and global | |
7142 | symbols. */ | |
7143 | ||
8f317e31 | 7144 | static bfd_boolean |
4d269e42 AM |
7145 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7146 | struct bfd_link_info *info) | |
7147 | { | |
7148 | bfd *bfd1, *bfd2; | |
7149 | const struct elf_backend_data *bed1, *bed2; | |
7150 | Elf_Internal_Shdr *hdr1, *hdr2; | |
7151 | bfd_size_type symcount1, symcount2; | |
7152 | Elf_Internal_Sym *isymbuf1, *isymbuf2; | |
7153 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7154 | Elf_Internal_Sym *isym, *isymend; | |
7155 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
7156 | bfd_size_type count1, count2, i; | |
cb33740c | 7157 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7158 | bfd_boolean result; |
7159 | ||
7160 | bfd1 = sec1->owner; | |
7161 | bfd2 = sec2->owner; | |
7162 | ||
4d269e42 AM |
7163 | /* Both sections have to be in ELF. */ |
7164 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7165 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7166 | return FALSE; | |
7167 | ||
7168 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7169 | return FALSE; | |
7170 | ||
4d269e42 AM |
7171 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7172 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7173 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7174 | return FALSE; |
7175 | ||
7176 | bed1 = get_elf_backend_data (bfd1); | |
7177 | bed2 = get_elf_backend_data (bfd2); | |
7178 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7179 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7180 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7181 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7182 | ||
7183 | if (symcount1 == 0 || symcount2 == 0) | |
7184 | return FALSE; | |
7185 | ||
7186 | result = FALSE; | |
7187 | isymbuf1 = NULL; | |
7188 | isymbuf2 = NULL; | |
a50b1753 NC |
7189 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7190 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7191 | |
7192 | if (ssymbuf1 == NULL) | |
7193 | { | |
7194 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7195 | NULL, NULL, NULL); | |
7196 | if (isymbuf1 == NULL) | |
7197 | goto done; | |
7198 | ||
7199 | if (!info->reduce_memory_overheads) | |
7200 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7201 | = elf_create_symbuf (symcount1, isymbuf1); | |
7202 | } | |
7203 | ||
7204 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7205 | { | |
7206 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7207 | NULL, NULL, NULL); | |
7208 | if (isymbuf2 == NULL) | |
7209 | goto done; | |
7210 | ||
7211 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7212 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7213 | = elf_create_symbuf (symcount2, isymbuf2); | |
7214 | } | |
7215 | ||
7216 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7217 | { | |
7218 | /* Optimized faster version. */ | |
7219 | bfd_size_type lo, hi, mid; | |
7220 | struct elf_symbol *symp; | |
7221 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7222 | ||
7223 | lo = 0; | |
7224 | hi = ssymbuf1->count; | |
7225 | ssymbuf1++; | |
7226 | count1 = 0; | |
7227 | while (lo < hi) | |
7228 | { | |
7229 | mid = (lo + hi) / 2; | |
cb33740c | 7230 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7231 | hi = mid; |
cb33740c | 7232 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7233 | lo = mid + 1; |
7234 | else | |
7235 | { | |
7236 | count1 = ssymbuf1[mid].count; | |
7237 | ssymbuf1 += mid; | |
7238 | break; | |
7239 | } | |
7240 | } | |
7241 | ||
7242 | lo = 0; | |
7243 | hi = ssymbuf2->count; | |
7244 | ssymbuf2++; | |
7245 | count2 = 0; | |
7246 | while (lo < hi) | |
7247 | { | |
7248 | mid = (lo + hi) / 2; | |
cb33740c | 7249 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7250 | hi = mid; |
cb33740c | 7251 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7252 | lo = mid + 1; |
7253 | else | |
7254 | { | |
7255 | count2 = ssymbuf2[mid].count; | |
7256 | ssymbuf2 += mid; | |
7257 | break; | |
7258 | } | |
7259 | } | |
7260 | ||
7261 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7262 | goto done; | |
7263 | ||
a50b1753 NC |
7264 | symtable1 = (struct elf_symbol *) |
7265 | bfd_malloc (count1 * sizeof (struct elf_symbol)); | |
7266 | symtable2 = (struct elf_symbol *) | |
7267 | bfd_malloc (count2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7268 | if (symtable1 == NULL || symtable2 == NULL) |
7269 | goto done; | |
7270 | ||
7271 | symp = symtable1; | |
7272 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7273 | ssym < ssymend; ssym++, symp++) | |
7274 | { | |
7275 | symp->u.ssym = ssym; | |
7276 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7277 | hdr1->sh_link, | |
7278 | ssym->st_name); | |
7279 | } | |
7280 | ||
7281 | symp = symtable2; | |
7282 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7283 | ssym < ssymend; ssym++, symp++) | |
7284 | { | |
7285 | symp->u.ssym = ssym; | |
7286 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7287 | hdr2->sh_link, | |
7288 | ssym->st_name); | |
7289 | } | |
7290 | ||
7291 | /* Sort symbol by name. */ | |
7292 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7293 | elf_sym_name_compare); | |
7294 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7295 | elf_sym_name_compare); | |
7296 | ||
7297 | for (i = 0; i < count1; i++) | |
7298 | /* Two symbols must have the same binding, type and name. */ | |
7299 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7300 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7301 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7302 | goto done; | |
7303 | ||
7304 | result = TRUE; | |
7305 | goto done; | |
7306 | } | |
7307 | ||
a50b1753 NC |
7308 | symtable1 = (struct elf_symbol *) |
7309 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7310 | symtable2 = (struct elf_symbol *) | |
7311 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7312 | if (symtable1 == NULL || symtable2 == NULL) |
7313 | goto done; | |
7314 | ||
7315 | /* Count definitions in the section. */ | |
7316 | count1 = 0; | |
7317 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7318 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7319 | symtable1[count1++].u.isym = isym; |
7320 | ||
7321 | count2 = 0; | |
7322 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7323 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7324 | symtable2[count2++].u.isym = isym; |
7325 | ||
7326 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7327 | goto done; | |
7328 | ||
7329 | for (i = 0; i < count1; i++) | |
7330 | symtable1[i].name | |
7331 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7332 | symtable1[i].u.isym->st_name); | |
7333 | ||
7334 | for (i = 0; i < count2; i++) | |
7335 | symtable2[i].name | |
7336 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7337 | symtable2[i].u.isym->st_name); | |
7338 | ||
7339 | /* Sort symbol by name. */ | |
7340 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7341 | elf_sym_name_compare); | |
7342 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7343 | elf_sym_name_compare); | |
7344 | ||
7345 | for (i = 0; i < count1; i++) | |
7346 | /* Two symbols must have the same binding, type and name. */ | |
7347 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7348 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7349 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7350 | goto done; | |
7351 | ||
7352 | result = TRUE; | |
7353 | ||
7354 | done: | |
7355 | if (symtable1) | |
7356 | free (symtable1); | |
7357 | if (symtable2) | |
7358 | free (symtable2); | |
7359 | if (isymbuf1) | |
7360 | free (isymbuf1); | |
7361 | if (isymbuf2) | |
7362 | free (isymbuf2); | |
7363 | ||
7364 | return result; | |
7365 | } | |
7366 | ||
7367 | /* Return TRUE if 2 section types are compatible. */ | |
7368 | ||
7369 | bfd_boolean | |
7370 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7371 | bfd *bbfd, const asection *bsec) | |
7372 | { | |
7373 | if (asec == NULL | |
7374 | || bsec == NULL | |
7375 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7376 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7377 | return TRUE; | |
7378 | ||
7379 | return elf_section_type (asec) == elf_section_type (bsec); | |
7380 | } | |
7381 | \f | |
c152c796 AM |
7382 | /* Final phase of ELF linker. */ |
7383 | ||
7384 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7385 | ||
7386 | struct elf_final_link_info | |
7387 | { | |
7388 | /* General link information. */ | |
7389 | struct bfd_link_info *info; | |
7390 | /* Output BFD. */ | |
7391 | bfd *output_bfd; | |
7392 | /* Symbol string table. */ | |
7393 | struct bfd_strtab_hash *symstrtab; | |
7394 | /* .dynsym section. */ | |
7395 | asection *dynsym_sec; | |
7396 | /* .hash section. */ | |
7397 | asection *hash_sec; | |
7398 | /* symbol version section (.gnu.version). */ | |
7399 | asection *symver_sec; | |
7400 | /* Buffer large enough to hold contents of any section. */ | |
7401 | bfd_byte *contents; | |
7402 | /* Buffer large enough to hold external relocs of any section. */ | |
7403 | void *external_relocs; | |
7404 | /* Buffer large enough to hold internal relocs of any section. */ | |
7405 | Elf_Internal_Rela *internal_relocs; | |
7406 | /* Buffer large enough to hold external local symbols of any input | |
7407 | BFD. */ | |
7408 | bfd_byte *external_syms; | |
7409 | /* And a buffer for symbol section indices. */ | |
7410 | Elf_External_Sym_Shndx *locsym_shndx; | |
7411 | /* Buffer large enough to hold internal local symbols of any input | |
7412 | BFD. */ | |
7413 | Elf_Internal_Sym *internal_syms; | |
7414 | /* Array large enough to hold a symbol index for each local symbol | |
7415 | of any input BFD. */ | |
7416 | long *indices; | |
7417 | /* Array large enough to hold a section pointer for each local | |
7418 | symbol of any input BFD. */ | |
7419 | asection **sections; | |
7420 | /* Buffer to hold swapped out symbols. */ | |
7421 | bfd_byte *symbuf; | |
7422 | /* And one for symbol section indices. */ | |
7423 | Elf_External_Sym_Shndx *symshndxbuf; | |
7424 | /* Number of swapped out symbols in buffer. */ | |
7425 | size_t symbuf_count; | |
7426 | /* Number of symbols which fit in symbuf. */ | |
7427 | size_t symbuf_size; | |
7428 | /* And same for symshndxbuf. */ | |
7429 | size_t shndxbuf_size; | |
7430 | }; | |
7431 | ||
7432 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7433 | ||
7434 | struct elf_outext_info | |
7435 | { | |
7436 | bfd_boolean failed; | |
7437 | bfd_boolean localsyms; | |
7438 | struct elf_final_link_info *finfo; | |
7439 | }; | |
7440 | ||
d9352518 DB |
7441 | |
7442 | /* Support for evaluating a complex relocation. | |
7443 | ||
7444 | Complex relocations are generalized, self-describing relocations. The | |
7445 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7446 | relocations themselves. |
d9352518 DB |
7447 | |
7448 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7449 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7450 | information (start bit, end bit, word width, etc) into the addend. This | |
7451 | information is extracted from CGEN-generated operand tables within gas. | |
7452 | ||
7453 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7454 | internal) representing prefix-notation expressions, including but not | |
7455 | limited to those sorts of expressions normally encoded as addends in the | |
7456 | addend field. The symbol mangling format is: | |
7457 | ||
7458 | <node> := <literal> | |
7459 | | <unary-operator> ':' <node> | |
7460 | | <binary-operator> ':' <node> ':' <node> | |
7461 | ; | |
7462 | ||
7463 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7464 | | 'S' <digits=N> ':' <N character section name> | |
7465 | | '#' <hexdigits> | |
7466 | ; | |
7467 | ||
7468 | <binary-operator> := as in C | |
7469 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7470 | ||
7471 | static void | |
a0c8462f AM |
7472 | set_symbol_value (bfd *bfd_with_globals, |
7473 | Elf_Internal_Sym *isymbuf, | |
7474 | size_t locsymcount, | |
7475 | size_t symidx, | |
7476 | bfd_vma val) | |
d9352518 | 7477 | { |
8977835c AM |
7478 | struct elf_link_hash_entry **sym_hashes; |
7479 | struct elf_link_hash_entry *h; | |
7480 | size_t extsymoff = locsymcount; | |
d9352518 | 7481 | |
8977835c | 7482 | if (symidx < locsymcount) |
d9352518 | 7483 | { |
8977835c AM |
7484 | Elf_Internal_Sym *sym; |
7485 | ||
7486 | sym = isymbuf + symidx; | |
7487 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7488 | { | |
7489 | /* It is a local symbol: move it to the | |
7490 | "absolute" section and give it a value. */ | |
7491 | sym->st_shndx = SHN_ABS; | |
7492 | sym->st_value = val; | |
7493 | return; | |
7494 | } | |
7495 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7496 | extsymoff = 0; | |
d9352518 | 7497 | } |
8977835c AM |
7498 | |
7499 | /* It is a global symbol: set its link type | |
7500 | to "defined" and give it a value. */ | |
7501 | ||
7502 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7503 | h = sym_hashes [symidx - extsymoff]; | |
7504 | while (h->root.type == bfd_link_hash_indirect | |
7505 | || h->root.type == bfd_link_hash_warning) | |
7506 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7507 | h->root.type = bfd_link_hash_defined; | |
7508 | h->root.u.def.value = val; | |
7509 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7510 | } |
7511 | ||
a0c8462f AM |
7512 | static bfd_boolean |
7513 | resolve_symbol (const char *name, | |
7514 | bfd *input_bfd, | |
7515 | struct elf_final_link_info *finfo, | |
7516 | bfd_vma *result, | |
7517 | Elf_Internal_Sym *isymbuf, | |
7518 | size_t locsymcount) | |
d9352518 | 7519 | { |
a0c8462f AM |
7520 | Elf_Internal_Sym *sym; |
7521 | struct bfd_link_hash_entry *global_entry; | |
7522 | const char *candidate = NULL; | |
7523 | Elf_Internal_Shdr *symtab_hdr; | |
7524 | size_t i; | |
7525 | ||
d9352518 DB |
7526 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7527 | ||
7528 | for (i = 0; i < locsymcount; ++ i) | |
7529 | { | |
8977835c | 7530 | sym = isymbuf + i; |
d9352518 DB |
7531 | |
7532 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7533 | continue; | |
7534 | ||
7535 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7536 | symtab_hdr->sh_link, | |
7537 | sym->st_name); | |
7538 | #ifdef DEBUG | |
0f02bbd9 AM |
7539 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7540 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7541 | #endif |
7542 | if (candidate && strcmp (candidate, name) == 0) | |
7543 | { | |
0f02bbd9 | 7544 | asection *sec = finfo->sections [i]; |
d9352518 | 7545 | |
0f02bbd9 AM |
7546 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7547 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7548 | #ifdef DEBUG |
0f02bbd9 AM |
7549 | printf ("Found symbol with value %8.8lx\n", |
7550 | (unsigned long) *result); | |
d9352518 DB |
7551 | #endif |
7552 | return TRUE; | |
7553 | } | |
7554 | } | |
7555 | ||
7556 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
a0c8462f AM |
7557 | global_entry = bfd_link_hash_lookup (finfo->info->hash, name, |
7558 | FALSE, FALSE, TRUE); | |
d9352518 DB |
7559 | if (!global_entry) |
7560 | return FALSE; | |
a0c8462f | 7561 | |
d9352518 DB |
7562 | if (global_entry->type == bfd_link_hash_defined |
7563 | || global_entry->type == bfd_link_hash_defweak) | |
7564 | { | |
a0c8462f AM |
7565 | *result = (global_entry->u.def.value |
7566 | + global_entry->u.def.section->output_section->vma | |
7567 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7568 | #ifdef DEBUG |
0f02bbd9 AM |
7569 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7570 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7571 | #endif |
7572 | return TRUE; | |
a0c8462f | 7573 | } |
d9352518 | 7574 | |
d9352518 DB |
7575 | return FALSE; |
7576 | } | |
7577 | ||
7578 | static bfd_boolean | |
a0c8462f AM |
7579 | resolve_section (const char *name, |
7580 | asection *sections, | |
7581 | bfd_vma *result) | |
d9352518 | 7582 | { |
a0c8462f AM |
7583 | asection *curr; |
7584 | unsigned int len; | |
d9352518 | 7585 | |
a0c8462f | 7586 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7587 | if (strcmp (curr->name, name) == 0) |
7588 | { | |
7589 | *result = curr->vma; | |
7590 | return TRUE; | |
7591 | } | |
7592 | ||
7593 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
a0c8462f | 7594 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7595 | { |
7596 | len = strlen (curr->name); | |
a0c8462f | 7597 | if (len > strlen (name)) |
d9352518 DB |
7598 | continue; |
7599 | ||
7600 | if (strncmp (curr->name, name, len) == 0) | |
7601 | { | |
7602 | if (strncmp (".end", name + len, 4) == 0) | |
7603 | { | |
7604 | *result = curr->vma + curr->size; | |
7605 | return TRUE; | |
7606 | } | |
7607 | ||
7608 | /* Insert more pseudo-section names here, if you like. */ | |
7609 | } | |
7610 | } | |
a0c8462f | 7611 | |
d9352518 DB |
7612 | return FALSE; |
7613 | } | |
7614 | ||
7615 | static void | |
a0c8462f | 7616 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7617 | { |
a0c8462f AM |
7618 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7619 | reftype, name); | |
d9352518 DB |
7620 | } |
7621 | ||
7622 | static bfd_boolean | |
a0c8462f AM |
7623 | eval_symbol (bfd_vma *result, |
7624 | const char **symp, | |
7625 | bfd *input_bfd, | |
7626 | struct elf_final_link_info *finfo, | |
7627 | bfd_vma dot, | |
7628 | Elf_Internal_Sym *isymbuf, | |
7629 | size_t locsymcount, | |
7630 | int signed_p) | |
d9352518 | 7631 | { |
4b93929b NC |
7632 | size_t len; |
7633 | size_t symlen; | |
a0c8462f AM |
7634 | bfd_vma a; |
7635 | bfd_vma b; | |
4b93929b | 7636 | char symbuf[4096]; |
0f02bbd9 | 7637 | const char *sym = *symp; |
a0c8462f AM |
7638 | const char *symend; |
7639 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7640 | |
7641 | len = strlen (sym); | |
7642 | symend = sym + len; | |
7643 | ||
4b93929b | 7644 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
7645 | { |
7646 | bfd_set_error (bfd_error_invalid_operation); | |
7647 | return FALSE; | |
7648 | } | |
a0c8462f | 7649 | |
d9352518 DB |
7650 | switch (* sym) |
7651 | { | |
7652 | case '.': | |
0f02bbd9 AM |
7653 | *result = dot; |
7654 | *symp = sym + 1; | |
d9352518 DB |
7655 | return TRUE; |
7656 | ||
7657 | case '#': | |
0f02bbd9 AM |
7658 | ++sym; |
7659 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
7660 | return TRUE; |
7661 | ||
7662 | case 'S': | |
7663 | symbol_is_section = TRUE; | |
a0c8462f | 7664 | case 's': |
0f02bbd9 AM |
7665 | ++sym; |
7666 | symlen = strtol (sym, (char **) symp, 10); | |
7667 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 7668 | |
4b93929b | 7669 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
7670 | { |
7671 | bfd_set_error (bfd_error_invalid_operation); | |
7672 | return FALSE; | |
7673 | } | |
7674 | ||
7675 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 7676 | symbuf[symlen] = '\0'; |
0f02bbd9 | 7677 | *symp = sym + symlen; |
a0c8462f AM |
7678 | |
7679 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
7680 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
7681 | interpretation here; section means "try section first", not "must be a | |
7682 | section", and likewise with symbol. */ | |
7683 | ||
a0c8462f | 7684 | if (symbol_is_section) |
d9352518 | 7685 | { |
8977835c AM |
7686 | if (!resolve_section (symbuf, finfo->output_bfd->sections, result) |
7687 | && !resolve_symbol (symbuf, input_bfd, finfo, result, | |
7688 | isymbuf, locsymcount)) | |
d9352518 DB |
7689 | { |
7690 | undefined_reference ("section", symbuf); | |
7691 | return FALSE; | |
7692 | } | |
a0c8462f AM |
7693 | } |
7694 | else | |
d9352518 | 7695 | { |
8977835c AM |
7696 | if (!resolve_symbol (symbuf, input_bfd, finfo, result, |
7697 | isymbuf, locsymcount) | |
7698 | && !resolve_section (symbuf, finfo->output_bfd->sections, | |
7699 | result)) | |
d9352518 DB |
7700 | { |
7701 | undefined_reference ("symbol", symbuf); | |
7702 | return FALSE; | |
7703 | } | |
7704 | } | |
7705 | ||
7706 | return TRUE; | |
a0c8462f | 7707 | |
d9352518 DB |
7708 | /* All that remains are operators. */ |
7709 | ||
7710 | #define UNARY_OP(op) \ | |
7711 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7712 | { \ | |
7713 | sym += strlen (#op); \ | |
a0c8462f AM |
7714 | if (*sym == ':') \ |
7715 | ++sym; \ | |
0f02bbd9 AM |
7716 | *symp = sym; \ |
7717 | if (!eval_symbol (&a, symp, input_bfd, finfo, dot, \ | |
7718 | isymbuf, locsymcount, signed_p)) \ | |
a0c8462f AM |
7719 | return FALSE; \ |
7720 | if (signed_p) \ | |
0f02bbd9 | 7721 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
7722 | else \ |
7723 | *result = op a; \ | |
d9352518 DB |
7724 | return TRUE; \ |
7725 | } | |
7726 | ||
7727 | #define BINARY_OP(op) \ | |
7728 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7729 | { \ | |
7730 | sym += strlen (#op); \ | |
a0c8462f AM |
7731 | if (*sym == ':') \ |
7732 | ++sym; \ | |
0f02bbd9 AM |
7733 | *symp = sym; \ |
7734 | if (!eval_symbol (&a, symp, input_bfd, finfo, dot, \ | |
7735 | isymbuf, locsymcount, signed_p)) \ | |
a0c8462f | 7736 | return FALSE; \ |
0f02bbd9 AM |
7737 | ++*symp; \ |
7738 | if (!eval_symbol (&b, symp, input_bfd, finfo, dot, \ | |
7739 | isymbuf, locsymcount, signed_p)) \ | |
a0c8462f AM |
7740 | return FALSE; \ |
7741 | if (signed_p) \ | |
0f02bbd9 | 7742 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
7743 | else \ |
7744 | *result = a op b; \ | |
d9352518 DB |
7745 | return TRUE; \ |
7746 | } | |
7747 | ||
7748 | default: | |
7749 | UNARY_OP (0-); | |
7750 | BINARY_OP (<<); | |
7751 | BINARY_OP (>>); | |
7752 | BINARY_OP (==); | |
7753 | BINARY_OP (!=); | |
7754 | BINARY_OP (<=); | |
7755 | BINARY_OP (>=); | |
7756 | BINARY_OP (&&); | |
7757 | BINARY_OP (||); | |
7758 | UNARY_OP (~); | |
7759 | UNARY_OP (!); | |
7760 | BINARY_OP (*); | |
7761 | BINARY_OP (/); | |
7762 | BINARY_OP (%); | |
7763 | BINARY_OP (^); | |
7764 | BINARY_OP (|); | |
7765 | BINARY_OP (&); | |
7766 | BINARY_OP (+); | |
7767 | BINARY_OP (-); | |
7768 | BINARY_OP (<); | |
7769 | BINARY_OP (>); | |
7770 | #undef UNARY_OP | |
7771 | #undef BINARY_OP | |
7772 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
7773 | bfd_set_error (bfd_error_invalid_operation); | |
7774 | return FALSE; | |
7775 | } | |
7776 | } | |
7777 | ||
d9352518 | 7778 | static void |
a0c8462f AM |
7779 | put_value (bfd_vma size, |
7780 | unsigned long chunksz, | |
7781 | bfd *input_bfd, | |
7782 | bfd_vma x, | |
7783 | bfd_byte *location) | |
d9352518 DB |
7784 | { |
7785 | location += (size - chunksz); | |
7786 | ||
a0c8462f | 7787 | for (; size; size -= chunksz, location -= chunksz, x >>= (chunksz * 8)) |
d9352518 DB |
7788 | { |
7789 | switch (chunksz) | |
7790 | { | |
7791 | default: | |
7792 | case 0: | |
7793 | abort (); | |
7794 | case 1: | |
7795 | bfd_put_8 (input_bfd, x, location); | |
7796 | break; | |
7797 | case 2: | |
7798 | bfd_put_16 (input_bfd, x, location); | |
7799 | break; | |
7800 | case 4: | |
7801 | bfd_put_32 (input_bfd, x, location); | |
7802 | break; | |
7803 | case 8: | |
7804 | #ifdef BFD64 | |
7805 | bfd_put_64 (input_bfd, x, location); | |
7806 | #else | |
7807 | abort (); | |
7808 | #endif | |
7809 | break; | |
7810 | } | |
7811 | } | |
7812 | } | |
7813 | ||
a0c8462f AM |
7814 | static bfd_vma |
7815 | get_value (bfd_vma size, | |
7816 | unsigned long chunksz, | |
7817 | bfd *input_bfd, | |
7818 | bfd_byte *location) | |
d9352518 DB |
7819 | { |
7820 | bfd_vma x = 0; | |
7821 | ||
a0c8462f | 7822 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
7823 | { |
7824 | switch (chunksz) | |
7825 | { | |
7826 | default: | |
7827 | case 0: | |
7828 | abort (); | |
7829 | case 1: | |
7830 | x = (x << (8 * chunksz)) | bfd_get_8 (input_bfd, location); | |
7831 | break; | |
7832 | case 2: | |
7833 | x = (x << (8 * chunksz)) | bfd_get_16 (input_bfd, location); | |
7834 | break; | |
7835 | case 4: | |
7836 | x = (x << (8 * chunksz)) | bfd_get_32 (input_bfd, location); | |
7837 | break; | |
7838 | case 8: | |
7839 | #ifdef BFD64 | |
7840 | x = (x << (8 * chunksz)) | bfd_get_64 (input_bfd, location); | |
7841 | #else | |
7842 | abort (); | |
7843 | #endif | |
7844 | break; | |
7845 | } | |
7846 | } | |
7847 | return x; | |
7848 | } | |
7849 | ||
a0c8462f AM |
7850 | static void |
7851 | decode_complex_addend (unsigned long *start, /* in bits */ | |
7852 | unsigned long *oplen, /* in bits */ | |
7853 | unsigned long *len, /* in bits */ | |
7854 | unsigned long *wordsz, /* in bytes */ | |
7855 | unsigned long *chunksz, /* in bytes */ | |
7856 | unsigned long *lsb0_p, | |
7857 | unsigned long *signed_p, | |
7858 | unsigned long *trunc_p, | |
7859 | unsigned long encoded) | |
d9352518 DB |
7860 | { |
7861 | * start = encoded & 0x3F; | |
7862 | * len = (encoded >> 6) & 0x3F; | |
7863 | * oplen = (encoded >> 12) & 0x3F; | |
7864 | * wordsz = (encoded >> 18) & 0xF; | |
7865 | * chunksz = (encoded >> 22) & 0xF; | |
7866 | * lsb0_p = (encoded >> 27) & 1; | |
7867 | * signed_p = (encoded >> 28) & 1; | |
7868 | * trunc_p = (encoded >> 29) & 1; | |
7869 | } | |
7870 | ||
cdfeee4f | 7871 | bfd_reloc_status_type |
0f02bbd9 | 7872 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 7873 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
7874 | bfd_byte *contents, |
7875 | Elf_Internal_Rela *rel, | |
7876 | bfd_vma relocation) | |
d9352518 | 7877 | { |
0f02bbd9 AM |
7878 | bfd_vma shift, x, mask; |
7879 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 7880 | bfd_reloc_status_type r; |
d9352518 DB |
7881 | |
7882 | /* Perform this reloc, since it is complex. | |
7883 | (this is not to say that it necessarily refers to a complex | |
7884 | symbol; merely that it is a self-describing CGEN based reloc. | |
7885 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 7886 | word size, etc) encoded within it.). */ |
d9352518 | 7887 | |
a0c8462f AM |
7888 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
7889 | &chunksz, &lsb0_p, &signed_p, | |
7890 | &trunc_p, rel->r_addend); | |
d9352518 DB |
7891 | |
7892 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
7893 | ||
7894 | if (lsb0_p) | |
7895 | shift = (start + 1) - len; | |
7896 | else | |
7897 | shift = (8 * wordsz) - (start + len); | |
7898 | ||
5dabe785 | 7899 | /* FIXME: octets_per_byte. */ |
a0c8462f | 7900 | x = get_value (wordsz, chunksz, input_bfd, contents + rel->r_offset); |
d9352518 DB |
7901 | |
7902 | #ifdef DEBUG | |
7903 | printf ("Doing complex reloc: " | |
7904 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
7905 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
7906 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
7907 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
7908 | oplen, (unsigned long) x, (unsigned long) mask, |
7909 | (unsigned long) relocation); | |
d9352518 DB |
7910 | #endif |
7911 | ||
cdfeee4f | 7912 | r = bfd_reloc_ok; |
d9352518 | 7913 | if (! trunc_p) |
cdfeee4f AM |
7914 | /* Now do an overflow check. */ |
7915 | r = bfd_check_overflow ((signed_p | |
7916 | ? complain_overflow_signed | |
7917 | : complain_overflow_unsigned), | |
7918 | len, 0, (8 * wordsz), | |
7919 | relocation); | |
a0c8462f | 7920 | |
d9352518 DB |
7921 | /* Do the deed. */ |
7922 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
7923 | ||
7924 | #ifdef DEBUG | |
7925 | printf (" relocation: %8.8lx\n" | |
7926 | " shifted mask: %8.8lx\n" | |
7927 | " shifted/masked reloc: %8.8lx\n" | |
7928 | " result: %8.8lx\n", | |
9ccb8af9 AM |
7929 | (unsigned long) relocation, (unsigned long) (mask << shift), |
7930 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 7931 | #endif |
5dabe785 | 7932 | /* FIXME: octets_per_byte. */ |
d9352518 | 7933 | put_value (wordsz, chunksz, input_bfd, x, contents + rel->r_offset); |
cdfeee4f | 7934 | return r; |
d9352518 DB |
7935 | } |
7936 | ||
c152c796 AM |
7937 | /* When performing a relocatable link, the input relocations are |
7938 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
7939 | referenced must be updated. Update all the relocations found in |
7940 | RELDATA. */ | |
c152c796 AM |
7941 | |
7942 | static void | |
7943 | elf_link_adjust_relocs (bfd *abfd, | |
d4730f92 | 7944 | struct bfd_elf_section_reloc_data *reldata) |
c152c796 AM |
7945 | { |
7946 | unsigned int i; | |
7947 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
7948 | bfd_byte *erela; | |
7949 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
7950 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
7951 | bfd_vma r_type_mask; | |
7952 | int r_sym_shift; | |
d4730f92 BS |
7953 | unsigned int count = reldata->count; |
7954 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 7955 | |
d4730f92 | 7956 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
7957 | { |
7958 | swap_in = bed->s->swap_reloc_in; | |
7959 | swap_out = bed->s->swap_reloc_out; | |
7960 | } | |
d4730f92 | 7961 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
7962 | { |
7963 | swap_in = bed->s->swap_reloca_in; | |
7964 | swap_out = bed->s->swap_reloca_out; | |
7965 | } | |
7966 | else | |
7967 | abort (); | |
7968 | ||
7969 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
7970 | abort (); | |
7971 | ||
7972 | if (bed->s->arch_size == 32) | |
7973 | { | |
7974 | r_type_mask = 0xff; | |
7975 | r_sym_shift = 8; | |
7976 | } | |
7977 | else | |
7978 | { | |
7979 | r_type_mask = 0xffffffff; | |
7980 | r_sym_shift = 32; | |
7981 | } | |
7982 | ||
d4730f92 BS |
7983 | erela = reldata->hdr->contents; |
7984 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
7985 | { |
7986 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
7987 | unsigned int j; | |
7988 | ||
7989 | if (*rel_hash == NULL) | |
7990 | continue; | |
7991 | ||
7992 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
7993 | ||
7994 | (*swap_in) (abfd, erela, irela); | |
7995 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
7996 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
7997 | | (irela[j].r_info & r_type_mask)); | |
7998 | (*swap_out) (abfd, irela, erela); | |
7999 | } | |
8000 | } | |
8001 | ||
8002 | struct elf_link_sort_rela | |
8003 | { | |
8004 | union { | |
8005 | bfd_vma offset; | |
8006 | bfd_vma sym_mask; | |
8007 | } u; | |
8008 | enum elf_reloc_type_class type; | |
8009 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8010 | Elf_Internal_Rela rela[1]; | |
8011 | }; | |
8012 | ||
8013 | static int | |
8014 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8015 | { | |
a50b1753 NC |
8016 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8017 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8018 | int relativea, relativeb; |
8019 | ||
8020 | relativea = a->type == reloc_class_relative; | |
8021 | relativeb = b->type == reloc_class_relative; | |
8022 | ||
8023 | if (relativea < relativeb) | |
8024 | return 1; | |
8025 | if (relativea > relativeb) | |
8026 | return -1; | |
8027 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8028 | return -1; | |
8029 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8030 | return 1; | |
8031 | if (a->rela->r_offset < b->rela->r_offset) | |
8032 | return -1; | |
8033 | if (a->rela->r_offset > b->rela->r_offset) | |
8034 | return 1; | |
8035 | return 0; | |
8036 | } | |
8037 | ||
8038 | static int | |
8039 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8040 | { | |
a50b1753 NC |
8041 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8042 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8043 | int copya, copyb; |
8044 | ||
8045 | if (a->u.offset < b->u.offset) | |
8046 | return -1; | |
8047 | if (a->u.offset > b->u.offset) | |
8048 | return 1; | |
8049 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); | |
8050 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
8051 | if (copya < copyb) | |
8052 | return -1; | |
8053 | if (copya > copyb) | |
8054 | return 1; | |
8055 | if (a->rela->r_offset < b->rela->r_offset) | |
8056 | return -1; | |
8057 | if (a->rela->r_offset > b->rela->r_offset) | |
8058 | return 1; | |
8059 | return 0; | |
8060 | } | |
8061 | ||
8062 | static size_t | |
8063 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8064 | { | |
3410fea8 | 8065 | asection *dynamic_relocs; |
fc66a176 L |
8066 | asection *rela_dyn; |
8067 | asection *rel_dyn; | |
c152c796 AM |
8068 | bfd_size_type count, size; |
8069 | size_t i, ret, sort_elt, ext_size; | |
8070 | bfd_byte *sort, *s_non_relative, *p; | |
8071 | struct elf_link_sort_rela *sq; | |
8072 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8073 | int i2e = bed->s->int_rels_per_ext_rel; | |
8074 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8075 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8076 | struct bfd_link_order *lo; | |
8077 | bfd_vma r_sym_mask; | |
3410fea8 | 8078 | bfd_boolean use_rela; |
c152c796 | 8079 | |
3410fea8 NC |
8080 | /* Find a dynamic reloc section. */ |
8081 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8082 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8083 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8084 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8085 | { |
3410fea8 NC |
8086 | bfd_boolean use_rela_initialised = FALSE; |
8087 | ||
8088 | /* This is just here to stop gcc from complaining. | |
8089 | It's initialization checking code is not perfect. */ | |
8090 | use_rela = TRUE; | |
8091 | ||
8092 | /* Both sections are present. Examine the sizes | |
8093 | of the indirect sections to help us choose. */ | |
8094 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8095 | if (lo->type == bfd_indirect_link_order) | |
8096 | { | |
8097 | asection *o = lo->u.indirect.section; | |
8098 | ||
8099 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8100 | { | |
8101 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8102 | /* Section size is divisible by both rel and rela sizes. | |
8103 | It is of no help to us. */ | |
8104 | ; | |
8105 | else | |
8106 | { | |
8107 | /* Section size is only divisible by rela. */ | |
8108 | if (use_rela_initialised && (use_rela == FALSE)) | |
8109 | { | |
8110 | _bfd_error_handler | |
8111 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8112 | bfd_set_error (bfd_error_invalid_operation); | |
8113 | return 0; | |
8114 | } | |
8115 | else | |
8116 | { | |
8117 | use_rela = TRUE; | |
8118 | use_rela_initialised = TRUE; | |
8119 | } | |
8120 | } | |
8121 | } | |
8122 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8123 | { | |
8124 | /* Section size is only divisible by rel. */ | |
8125 | if (use_rela_initialised && (use_rela == TRUE)) | |
8126 | { | |
8127 | _bfd_error_handler | |
8128 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8129 | bfd_set_error (bfd_error_invalid_operation); | |
8130 | return 0; | |
8131 | } | |
8132 | else | |
8133 | { | |
8134 | use_rela = FALSE; | |
8135 | use_rela_initialised = TRUE; | |
8136 | } | |
8137 | } | |
8138 | else | |
8139 | { | |
8140 | /* The section size is not divisible by either - something is wrong. */ | |
8141 | _bfd_error_handler | |
8142 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8143 | bfd_set_error (bfd_error_invalid_operation); | |
8144 | return 0; | |
8145 | } | |
8146 | } | |
8147 | ||
8148 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8149 | if (lo->type == bfd_indirect_link_order) | |
8150 | { | |
8151 | asection *o = lo->u.indirect.section; | |
8152 | ||
8153 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8154 | { | |
8155 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8156 | /* Section size is divisible by both rel and rela sizes. | |
8157 | It is of no help to us. */ | |
8158 | ; | |
8159 | else | |
8160 | { | |
8161 | /* Section size is only divisible by rela. */ | |
8162 | if (use_rela_initialised && (use_rela == FALSE)) | |
8163 | { | |
8164 | _bfd_error_handler | |
8165 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8166 | bfd_set_error (bfd_error_invalid_operation); | |
8167 | return 0; | |
8168 | } | |
8169 | else | |
8170 | { | |
8171 | use_rela = TRUE; | |
8172 | use_rela_initialised = TRUE; | |
8173 | } | |
8174 | } | |
8175 | } | |
8176 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8177 | { | |
8178 | /* Section size is only divisible by rel. */ | |
8179 | if (use_rela_initialised && (use_rela == TRUE)) | |
8180 | { | |
8181 | _bfd_error_handler | |
8182 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8183 | bfd_set_error (bfd_error_invalid_operation); | |
8184 | return 0; | |
8185 | } | |
8186 | else | |
8187 | { | |
8188 | use_rela = FALSE; | |
8189 | use_rela_initialised = TRUE; | |
8190 | } | |
8191 | } | |
8192 | else | |
8193 | { | |
8194 | /* The section size is not divisible by either - something is wrong. */ | |
8195 | _bfd_error_handler | |
8196 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8197 | bfd_set_error (bfd_error_invalid_operation); | |
8198 | return 0; | |
8199 | } | |
8200 | } | |
8201 | ||
8202 | if (! use_rela_initialised) | |
8203 | /* Make a guess. */ | |
8204 | use_rela = TRUE; | |
c152c796 | 8205 | } |
fc66a176 L |
8206 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8207 | use_rela = TRUE; | |
8208 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8209 | use_rela = FALSE; |
c152c796 | 8210 | else |
fc66a176 | 8211 | return 0; |
3410fea8 NC |
8212 | |
8213 | if (use_rela) | |
c152c796 | 8214 | { |
3410fea8 | 8215 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8216 | ext_size = bed->s->sizeof_rela; |
8217 | swap_in = bed->s->swap_reloca_in; | |
8218 | swap_out = bed->s->swap_reloca_out; | |
8219 | } | |
3410fea8 NC |
8220 | else |
8221 | { | |
8222 | dynamic_relocs = rel_dyn; | |
8223 | ext_size = bed->s->sizeof_rel; | |
8224 | swap_in = bed->s->swap_reloc_in; | |
8225 | swap_out = bed->s->swap_reloc_out; | |
8226 | } | |
c152c796 AM |
8227 | |
8228 | size = 0; | |
3410fea8 | 8229 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8230 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8231 | size += lo->u.indirect.section->size; |
c152c796 | 8232 | |
3410fea8 | 8233 | if (size != dynamic_relocs->size) |
c152c796 AM |
8234 | return 0; |
8235 | ||
8236 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8237 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8238 | |
8239 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8240 | if (count == 0) |
8241 | return 0; | |
a50b1753 | 8242 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8243 | |
c152c796 AM |
8244 | if (sort == NULL) |
8245 | { | |
8246 | (*info->callbacks->warning) | |
8247 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8248 | return 0; | |
8249 | } | |
8250 | ||
8251 | if (bed->s->arch_size == 32) | |
8252 | r_sym_mask = ~(bfd_vma) 0xff; | |
8253 | else | |
8254 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8255 | ||
3410fea8 | 8256 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8257 | if (lo->type == bfd_indirect_link_order) |
8258 | { | |
8259 | bfd_byte *erel, *erelend; | |
8260 | asection *o = lo->u.indirect.section; | |
8261 | ||
1da212d6 AM |
8262 | if (o->contents == NULL && o->size != 0) |
8263 | { | |
8264 | /* This is a reloc section that is being handled as a normal | |
8265 | section. See bfd_section_from_shdr. We can't combine | |
8266 | relocs in this case. */ | |
8267 | free (sort); | |
8268 | return 0; | |
8269 | } | |
c152c796 | 8270 | erel = o->contents; |
eea6121a | 8271 | erelend = o->contents + o->size; |
5dabe785 | 8272 | /* FIXME: octets_per_byte. */ |
c152c796 | 8273 | p = sort + o->output_offset / ext_size * sort_elt; |
3410fea8 | 8274 | |
c152c796 AM |
8275 | while (erel < erelend) |
8276 | { | |
8277 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8278 | |
c152c796 AM |
8279 | (*swap_in) (abfd, erel, s->rela); |
8280 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
8281 | s->u.sym_mask = r_sym_mask; | |
8282 | p += sort_elt; | |
8283 | erel += ext_size; | |
8284 | } | |
8285 | } | |
8286 | ||
8287 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8288 | ||
8289 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8290 | { | |
8291 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8292 | if (s->type != reloc_class_relative) | |
8293 | break; | |
8294 | } | |
8295 | ret = i; | |
8296 | s_non_relative = p; | |
8297 | ||
8298 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8299 | for (; i < count; i++, p += sort_elt) | |
8300 | { | |
8301 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8302 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8303 | sq = sp; | |
8304 | sp->u.offset = sq->rela->r_offset; | |
8305 | } | |
8306 | ||
8307 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8308 | ||
3410fea8 | 8309 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8310 | if (lo->type == bfd_indirect_link_order) |
8311 | { | |
8312 | bfd_byte *erel, *erelend; | |
8313 | asection *o = lo->u.indirect.section; | |
8314 | ||
8315 | erel = o->contents; | |
eea6121a | 8316 | erelend = o->contents + o->size; |
5dabe785 | 8317 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
8318 | p = sort + o->output_offset / ext_size * sort_elt; |
8319 | while (erel < erelend) | |
8320 | { | |
8321 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8322 | (*swap_out) (abfd, s->rela, erel); | |
8323 | p += sort_elt; | |
8324 | erel += ext_size; | |
8325 | } | |
8326 | } | |
8327 | ||
8328 | free (sort); | |
3410fea8 | 8329 | *psec = dynamic_relocs; |
c152c796 AM |
8330 | return ret; |
8331 | } | |
8332 | ||
8333 | /* Flush the output symbols to the file. */ | |
8334 | ||
8335 | static bfd_boolean | |
8336 | elf_link_flush_output_syms (struct elf_final_link_info *finfo, | |
8337 | const struct elf_backend_data *bed) | |
8338 | { | |
8339 | if (finfo->symbuf_count > 0) | |
8340 | { | |
8341 | Elf_Internal_Shdr *hdr; | |
8342 | file_ptr pos; | |
8343 | bfd_size_type amt; | |
8344 | ||
8345 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
8346 | pos = hdr->sh_offset + hdr->sh_size; | |
8347 | amt = finfo->symbuf_count * bed->s->sizeof_sym; | |
8348 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
8349 | || bfd_bwrite (finfo->symbuf, amt, finfo->output_bfd) != amt) | |
8350 | return FALSE; | |
8351 | ||
8352 | hdr->sh_size += amt; | |
8353 | finfo->symbuf_count = 0; | |
8354 | } | |
8355 | ||
8356 | return TRUE; | |
8357 | } | |
8358 | ||
8359 | /* Add a symbol to the output symbol table. */ | |
8360 | ||
6e0b88f1 | 8361 | static int |
c152c796 AM |
8362 | elf_link_output_sym (struct elf_final_link_info *finfo, |
8363 | const char *name, | |
8364 | Elf_Internal_Sym *elfsym, | |
8365 | asection *input_sec, | |
8366 | struct elf_link_hash_entry *h) | |
8367 | { | |
8368 | bfd_byte *dest; | |
8369 | Elf_External_Sym_Shndx *destshndx; | |
6e0b88f1 | 8370 | int (*output_symbol_hook) |
c152c796 AM |
8371 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8372 | struct elf_link_hash_entry *); | |
8373 | const struct elf_backend_data *bed; | |
8374 | ||
8375 | bed = get_elf_backend_data (finfo->output_bfd); | |
8376 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; | |
8377 | if (output_symbol_hook != NULL) | |
8378 | { | |
6e0b88f1 AM |
8379 | int ret = (*output_symbol_hook) (finfo->info, name, elfsym, input_sec, h); |
8380 | if (ret != 1) | |
8381 | return ret; | |
c152c796 AM |
8382 | } |
8383 | ||
8384 | if (name == NULL || *name == '\0') | |
8385 | elfsym->st_name = 0; | |
8386 | else if (input_sec->flags & SEC_EXCLUDE) | |
8387 | elfsym->st_name = 0; | |
8388 | else | |
8389 | { | |
8390 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
8391 | name, TRUE, FALSE); | |
8392 | if (elfsym->st_name == (unsigned long) -1) | |
6e0b88f1 | 8393 | return 0; |
c152c796 AM |
8394 | } |
8395 | ||
8396 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
8397 | { | |
8398 | if (! elf_link_flush_output_syms (finfo, bed)) | |
6e0b88f1 | 8399 | return 0; |
c152c796 AM |
8400 | } |
8401 | ||
8402 | dest = finfo->symbuf + finfo->symbuf_count * bed->s->sizeof_sym; | |
8403 | destshndx = finfo->symshndxbuf; | |
8404 | if (destshndx != NULL) | |
8405 | { | |
8406 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
8407 | { | |
8408 | bfd_size_type amt; | |
8409 | ||
8410 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); | |
a50b1753 NC |
8411 | destshndx = (Elf_External_Sym_Shndx *) bfd_realloc (destshndx, |
8412 | amt * 2); | |
c152c796 | 8413 | if (destshndx == NULL) |
6e0b88f1 | 8414 | return 0; |
515ef31d | 8415 | finfo->symshndxbuf = destshndx; |
c152c796 AM |
8416 | memset ((char *) destshndx + amt, 0, amt); |
8417 | finfo->shndxbuf_size *= 2; | |
8418 | } | |
8419 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
8420 | } | |
8421 | ||
8422 | bed->s->swap_symbol_out (finfo->output_bfd, elfsym, dest, destshndx); | |
8423 | finfo->symbuf_count += 1; | |
8424 | bfd_get_symcount (finfo->output_bfd) += 1; | |
8425 | ||
6e0b88f1 | 8426 | return 1; |
c152c796 AM |
8427 | } |
8428 | ||
c0d5a53d L |
8429 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
8430 | ||
8431 | static bfd_boolean | |
8432 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
8433 | { | |
4fbb74a6 AM |
8434 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
8435 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
8436 | { |
8437 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 8438 | beyond 64k. */ |
c0d5a53d L |
8439 | (*_bfd_error_handler) |
8440 | (_("%B: Too many sections: %d (>= %d)"), | |
4fbb74a6 | 8441 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
8442 | bfd_set_error (bfd_error_nonrepresentable_section); |
8443 | return FALSE; | |
8444 | } | |
8445 | return TRUE; | |
8446 | } | |
8447 | ||
c152c796 AM |
8448 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
8449 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
8450 | versioned symbol that would normally require an explicit version. | |
8451 | We also handle the case that a DSO references a hidden symbol | |
8452 | which may be satisfied by a versioned symbol in another DSO. */ | |
8453 | ||
8454 | static bfd_boolean | |
8455 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
8456 | const struct elf_backend_data *bed, | |
8457 | struct elf_link_hash_entry *h) | |
8458 | { | |
8459 | bfd *abfd; | |
8460 | struct elf_link_loaded_list *loaded; | |
8461 | ||
8462 | if (!is_elf_hash_table (info->hash)) | |
8463 | return FALSE; | |
8464 | ||
8465 | switch (h->root.type) | |
8466 | { | |
8467 | default: | |
8468 | abfd = NULL; | |
8469 | break; | |
8470 | ||
8471 | case bfd_link_hash_undefined: | |
8472 | case bfd_link_hash_undefweak: | |
8473 | abfd = h->root.u.undef.abfd; | |
8474 | if ((abfd->flags & DYNAMIC) == 0 | |
e56f61be | 8475 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
8476 | return FALSE; |
8477 | break; | |
8478 | ||
8479 | case bfd_link_hash_defined: | |
8480 | case bfd_link_hash_defweak: | |
8481 | abfd = h->root.u.def.section->owner; | |
8482 | break; | |
8483 | ||
8484 | case bfd_link_hash_common: | |
8485 | abfd = h->root.u.c.p->section->owner; | |
8486 | break; | |
8487 | } | |
8488 | BFD_ASSERT (abfd != NULL); | |
8489 | ||
8490 | for (loaded = elf_hash_table (info)->loaded; | |
8491 | loaded != NULL; | |
8492 | loaded = loaded->next) | |
8493 | { | |
8494 | bfd *input; | |
8495 | Elf_Internal_Shdr *hdr; | |
8496 | bfd_size_type symcount; | |
8497 | bfd_size_type extsymcount; | |
8498 | bfd_size_type extsymoff; | |
8499 | Elf_Internal_Shdr *versymhdr; | |
8500 | Elf_Internal_Sym *isym; | |
8501 | Elf_Internal_Sym *isymend; | |
8502 | Elf_Internal_Sym *isymbuf; | |
8503 | Elf_External_Versym *ever; | |
8504 | Elf_External_Versym *extversym; | |
8505 | ||
8506 | input = loaded->abfd; | |
8507 | ||
8508 | /* We check each DSO for a possible hidden versioned definition. */ | |
8509 | if (input == abfd | |
8510 | || (input->flags & DYNAMIC) == 0 | |
8511 | || elf_dynversym (input) == 0) | |
8512 | continue; | |
8513 | ||
8514 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
8515 | ||
8516 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
8517 | if (elf_bad_symtab (input)) | |
8518 | { | |
8519 | extsymcount = symcount; | |
8520 | extsymoff = 0; | |
8521 | } | |
8522 | else | |
8523 | { | |
8524 | extsymcount = symcount - hdr->sh_info; | |
8525 | extsymoff = hdr->sh_info; | |
8526 | } | |
8527 | ||
8528 | if (extsymcount == 0) | |
8529 | continue; | |
8530 | ||
8531 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
8532 | NULL, NULL, NULL); | |
8533 | if (isymbuf == NULL) | |
8534 | return FALSE; | |
8535 | ||
8536 | /* Read in any version definitions. */ | |
8537 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 8538 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
8539 | if (extversym == NULL) |
8540 | goto error_ret; | |
8541 | ||
8542 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
8543 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
8544 | != versymhdr->sh_size)) | |
8545 | { | |
8546 | free (extversym); | |
8547 | error_ret: | |
8548 | free (isymbuf); | |
8549 | return FALSE; | |
8550 | } | |
8551 | ||
8552 | ever = extversym + extsymoff; | |
8553 | isymend = isymbuf + extsymcount; | |
8554 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
8555 | { | |
8556 | const char *name; | |
8557 | Elf_Internal_Versym iver; | |
8558 | unsigned short version_index; | |
8559 | ||
8560 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
8561 | || isym->st_shndx == SHN_UNDEF) | |
8562 | continue; | |
8563 | ||
8564 | name = bfd_elf_string_from_elf_section (input, | |
8565 | hdr->sh_link, | |
8566 | isym->st_name); | |
8567 | if (strcmp (name, h->root.root.string) != 0) | |
8568 | continue; | |
8569 | ||
8570 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
8571 | ||
d023c380 L |
8572 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
8573 | && !(h->def_regular | |
8574 | && h->forced_local)) | |
c152c796 AM |
8575 | { |
8576 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
8577 | have provided a definition for the undefined sym unless |
8578 | it is defined in a non-shared object and forced local. | |
8579 | */ | |
c152c796 AM |
8580 | abort (); |
8581 | } | |
8582 | ||
8583 | version_index = iver.vs_vers & VERSYM_VERSION; | |
8584 | if (version_index == 1 || version_index == 2) | |
8585 | { | |
8586 | /* This is the base or first version. We can use it. */ | |
8587 | free (extversym); | |
8588 | free (isymbuf); | |
8589 | return TRUE; | |
8590 | } | |
8591 | } | |
8592 | ||
8593 | free (extversym); | |
8594 | free (isymbuf); | |
8595 | } | |
8596 | ||
8597 | return FALSE; | |
8598 | } | |
8599 | ||
8600 | /* Add an external symbol to the symbol table. This is called from | |
8601 | the hash table traversal routine. When generating a shared object, | |
8602 | we go through the symbol table twice. The first time we output | |
8603 | anything that might have been forced to local scope in a version | |
8604 | script. The second time we output the symbols that are still | |
8605 | global symbols. */ | |
8606 | ||
8607 | static bfd_boolean | |
8608 | elf_link_output_extsym (struct elf_link_hash_entry *h, void *data) | |
8609 | { | |
a50b1753 | 8610 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
c152c796 AM |
8611 | struct elf_final_link_info *finfo = eoinfo->finfo; |
8612 | bfd_boolean strip; | |
8613 | Elf_Internal_Sym sym; | |
8614 | asection *input_sec; | |
8615 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
8616 | long indx; |
8617 | int ret; | |
c152c796 AM |
8618 | |
8619 | if (h->root.type == bfd_link_hash_warning) | |
8620 | { | |
8621 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8622 | if (h->root.type == bfd_link_hash_new) | |
8623 | return TRUE; | |
8624 | } | |
8625 | ||
8626 | /* Decide whether to output this symbol in this pass. */ | |
8627 | if (eoinfo->localsyms) | |
8628 | { | |
f5385ebf | 8629 | if (!h->forced_local) |
c152c796 AM |
8630 | return TRUE; |
8631 | } | |
8632 | else | |
8633 | { | |
f5385ebf | 8634 | if (h->forced_local) |
c152c796 AM |
8635 | return TRUE; |
8636 | } | |
8637 | ||
8638 | bed = get_elf_backend_data (finfo->output_bfd); | |
8639 | ||
12ac1cf5 | 8640 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 8641 | { |
12ac1cf5 NC |
8642 | /* If we have an undefined symbol reference here then it must have |
8643 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
8644 | references in regular files have already been handled unless |
8645 | they are in unreferenced sections which are removed by garbage | |
8646 | collection). */ | |
12ac1cf5 NC |
8647 | bfd_boolean ignore_undef = FALSE; |
8648 | ||
8649 | /* Some symbols may be special in that the fact that they're | |
8650 | undefined can be safely ignored - let backend determine that. */ | |
8651 | if (bed->elf_backend_ignore_undef_symbol) | |
8652 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
8653 | ||
8654 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 8655 | if (!ignore_undef |
12ac1cf5 | 8656 | && h->ref_dynamic |
98da7939 | 8657 | && (!h->ref_regular || finfo->info->gc_sections) |
12ac1cf5 NC |
8658 | && ! elf_link_check_versioned_symbol (finfo->info, bed, h) |
8659 | && finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
c152c796 | 8660 | { |
12ac1cf5 | 8661 | if (! (finfo->info->callbacks->undefined_symbol |
98da7939 L |
8662 | (finfo->info, h->root.root.string, |
8663 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
12ac1cf5 NC |
8664 | NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR))) |
8665 | { | |
17d078c5 | 8666 | bfd_set_error (bfd_error_bad_value); |
12ac1cf5 NC |
8667 | eoinfo->failed = TRUE; |
8668 | return FALSE; | |
8669 | } | |
c152c796 AM |
8670 | } |
8671 | } | |
8672 | ||
8673 | /* We should also warn if a forced local symbol is referenced from | |
8674 | shared libraries. */ | |
8675 | if (! finfo->info->relocatable | |
8676 | && (! finfo->info->shared) | |
f5385ebf AM |
8677 | && h->forced_local |
8678 | && h->ref_dynamic | |
8679 | && !h->dynamic_def | |
8680 | && !h->dynamic_weak | |
c152c796 AM |
8681 | && ! elf_link_check_versioned_symbol (finfo->info, bed, h)) |
8682 | { | |
17d078c5 AM |
8683 | bfd *def_bfd; |
8684 | const char *msg; | |
8685 | ||
8686 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
8687 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); | |
8688 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
8689 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); | |
8690 | else | |
8691 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); | |
8692 | def_bfd = finfo->output_bfd; | |
8693 | if (h->root.u.def.section != bfd_abs_section_ptr) | |
8694 | def_bfd = h->root.u.def.section->owner; | |
8695 | (*_bfd_error_handler) (msg, finfo->output_bfd, def_bfd, | |
8696 | h->root.root.string); | |
8697 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
8698 | eoinfo->failed = TRUE; |
8699 | return FALSE; | |
8700 | } | |
8701 | ||
8702 | /* We don't want to output symbols that have never been mentioned by | |
8703 | a regular file, or that we have been told to strip. However, if | |
8704 | h->indx is set to -2, the symbol is used by a reloc and we must | |
8705 | output it. */ | |
8706 | if (h->indx == -2) | |
8707 | strip = FALSE; | |
f5385ebf | 8708 | else if ((h->def_dynamic |
77cfaee6 AM |
8709 | || h->ref_dynamic |
8710 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
8711 | && !h->def_regular |
8712 | && !h->ref_regular) | |
c152c796 AM |
8713 | strip = TRUE; |
8714 | else if (finfo->info->strip == strip_all) | |
8715 | strip = TRUE; | |
8716 | else if (finfo->info->strip == strip_some | |
8717 | && bfd_hash_lookup (finfo->info->keep_hash, | |
8718 | h->root.root.string, FALSE, FALSE) == NULL) | |
8719 | strip = TRUE; | |
8720 | else if (finfo->info->strip_discarded | |
8721 | && (h->root.type == bfd_link_hash_defined | |
8722 | || h->root.type == bfd_link_hash_defweak) | |
8723 | && elf_discarded_section (h->root.u.def.section)) | |
8724 | strip = TRUE; | |
9e2278f5 AM |
8725 | else if ((h->root.type == bfd_link_hash_undefined |
8726 | || h->root.type == bfd_link_hash_undefweak) | |
8727 | && h->root.u.undef.abfd != NULL | |
8728 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
8729 | strip = TRUE; | |
c152c796 AM |
8730 | else |
8731 | strip = FALSE; | |
8732 | ||
8733 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
57ca8ac7 L |
8734 | nothing else to do unless it is a forced local symbol or a |
8735 | STT_GNU_IFUNC symbol. */ | |
c152c796 AM |
8736 | if (strip |
8737 | && h->dynindx == -1 | |
57ca8ac7 | 8738 | && h->type != STT_GNU_IFUNC |
f5385ebf | 8739 | && !h->forced_local) |
c152c796 AM |
8740 | return TRUE; |
8741 | ||
8742 | sym.st_value = 0; | |
8743 | sym.st_size = h->size; | |
8744 | sym.st_other = h->other; | |
f5385ebf | 8745 | if (h->forced_local) |
935bd1e0 L |
8746 | { |
8747 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
8748 | /* Turn off visibility on local symbol. */ | |
8749 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
8750 | } | |
3e7a7d11 NC |
8751 | else if (h->unique_global) |
8752 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, h->type); | |
c152c796 AM |
8753 | else if (h->root.type == bfd_link_hash_undefweak |
8754 | || h->root.type == bfd_link_hash_defweak) | |
8755 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
8756 | else | |
8757 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
35fc36a8 | 8758 | sym.st_target_internal = h->target_internal; |
c152c796 AM |
8759 | |
8760 | switch (h->root.type) | |
8761 | { | |
8762 | default: | |
8763 | case bfd_link_hash_new: | |
8764 | case bfd_link_hash_warning: | |
8765 | abort (); | |
8766 | return FALSE; | |
8767 | ||
8768 | case bfd_link_hash_undefined: | |
8769 | case bfd_link_hash_undefweak: | |
8770 | input_sec = bfd_und_section_ptr; | |
8771 | sym.st_shndx = SHN_UNDEF; | |
8772 | break; | |
8773 | ||
8774 | case bfd_link_hash_defined: | |
8775 | case bfd_link_hash_defweak: | |
8776 | { | |
8777 | input_sec = h->root.u.def.section; | |
8778 | if (input_sec->output_section != NULL) | |
8779 | { | |
8780 | sym.st_shndx = | |
8781 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
8782 | input_sec->output_section); | |
8783 | if (sym.st_shndx == SHN_BAD) | |
8784 | { | |
8785 | (*_bfd_error_handler) | |
d003868e AM |
8786 | (_("%B: could not find output section %A for input section %A"), |
8787 | finfo->output_bfd, input_sec->output_section, input_sec); | |
17d078c5 | 8788 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
8789 | eoinfo->failed = TRUE; |
8790 | return FALSE; | |
8791 | } | |
8792 | ||
8793 | /* ELF symbols in relocatable files are section relative, | |
8794 | but in nonrelocatable files they are virtual | |
8795 | addresses. */ | |
8796 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
8797 | if (! finfo->info->relocatable) | |
8798 | { | |
8799 | sym.st_value += input_sec->output_section->vma; | |
8800 | if (h->type == STT_TLS) | |
8801 | { | |
430a16a5 NC |
8802 | asection *tls_sec = elf_hash_table (finfo->info)->tls_sec; |
8803 | if (tls_sec != NULL) | |
8804 | sym.st_value -= tls_sec->vma; | |
8805 | else | |
8806 | { | |
8807 | /* The TLS section may have been garbage collected. */ | |
8808 | BFD_ASSERT (finfo->info->gc_sections | |
8809 | && !input_sec->gc_mark); | |
8810 | } | |
c152c796 AM |
8811 | } |
8812 | } | |
8813 | } | |
8814 | else | |
8815 | { | |
8816 | BFD_ASSERT (input_sec->owner == NULL | |
8817 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
8818 | sym.st_shndx = SHN_UNDEF; | |
8819 | input_sec = bfd_und_section_ptr; | |
8820 | } | |
8821 | } | |
8822 | break; | |
8823 | ||
8824 | case bfd_link_hash_common: | |
8825 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 8826 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
8827 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
8828 | break; | |
8829 | ||
8830 | case bfd_link_hash_indirect: | |
8831 | /* These symbols are created by symbol versioning. They point | |
8832 | to the decorated version of the name. For example, if the | |
8833 | symbol foo@@GNU_1.2 is the default, which should be used when | |
8834 | foo is used with no version, then we add an indirect symbol | |
8835 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
8836 | since the indirected symbol is already in the hash table. */ | |
8837 | return TRUE; | |
8838 | } | |
8839 | ||
8840 | /* Give the processor backend a chance to tweak the symbol value, | |
8841 | and also to finish up anything that needs to be done for this | |
8842 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 8843 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 8844 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 8845 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 8846 | && h->def_regular |
3aa14d16 L |
8847 | && !finfo->info->relocatable) |
8848 | || ((h->dynindx != -1 | |
8849 | || h->forced_local) | |
8850 | && ((finfo->info->shared | |
8851 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
8852 | || h->root.type != bfd_link_hash_undefweak)) | |
8853 | || !h->forced_local) | |
8854 | && elf_hash_table (finfo->info)->dynamic_sections_created)) | |
c152c796 AM |
8855 | { |
8856 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8857 | (finfo->output_bfd, finfo->info, h, &sym))) | |
8858 | { | |
8859 | eoinfo->failed = TRUE; | |
8860 | return FALSE; | |
8861 | } | |
8862 | } | |
8863 | ||
8864 | /* If we are marking the symbol as undefined, and there are no | |
8865 | non-weak references to this symbol from a regular object, then | |
8866 | mark the symbol as weak undefined; if there are non-weak | |
8867 | references, mark the symbol as strong. We can't do this earlier, | |
8868 | because it might not be marked as undefined until the | |
8869 | finish_dynamic_symbol routine gets through with it. */ | |
8870 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 8871 | && h->ref_regular |
c152c796 AM |
8872 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
8873 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
8874 | { | |
8875 | int bindtype; | |
2955ec4c L |
8876 | unsigned int type = ELF_ST_TYPE (sym.st_info); |
8877 | ||
8878 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
8879 | if (type == STT_GNU_IFUNC) | |
8880 | type = STT_FUNC; | |
c152c796 | 8881 | |
f5385ebf | 8882 | if (h->ref_regular_nonweak) |
c152c796 AM |
8883 | bindtype = STB_GLOBAL; |
8884 | else | |
8885 | bindtype = STB_WEAK; | |
2955ec4c | 8886 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
8887 | } |
8888 | ||
bda987c2 CD |
8889 | /* If this is a symbol defined in a dynamic library, don't use the |
8890 | symbol size from the dynamic library. Relinking an executable | |
8891 | against a new library may introduce gratuitous changes in the | |
8892 | executable's symbols if we keep the size. */ | |
8893 | if (sym.st_shndx == SHN_UNDEF | |
8894 | && !h->def_regular | |
8895 | && h->def_dynamic) | |
8896 | sym.st_size = 0; | |
8897 | ||
c152c796 AM |
8898 | /* If a non-weak symbol with non-default visibility is not defined |
8899 | locally, it is a fatal error. */ | |
8900 | if (! finfo->info->relocatable | |
8901 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT | |
8902 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
8903 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 8904 | && !h->def_regular) |
c152c796 | 8905 | { |
17d078c5 AM |
8906 | const char *msg; |
8907 | ||
8908 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
8909 | msg = _("%B: protected symbol `%s' isn't defined"); | |
8910 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
8911 | msg = _("%B: internal symbol `%s' isn't defined"); | |
8912 | else | |
8913 | msg = _("%B: hidden symbol `%s' isn't defined"); | |
8914 | (*_bfd_error_handler) (msg, finfo->output_bfd, h->root.root.string); | |
8915 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
8916 | eoinfo->failed = TRUE; |
8917 | return FALSE; | |
8918 | } | |
8919 | ||
8920 | /* If this symbol should be put in the .dynsym section, then put it | |
8921 | there now. We already know the symbol index. We also fill in | |
8922 | the entry in the .hash section. */ | |
8923 | if (h->dynindx != -1 | |
8924 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
8925 | { | |
c152c796 AM |
8926 | bfd_byte *esym; |
8927 | ||
8928 | sym.st_name = h->dynstr_index; | |
8929 | esym = finfo->dynsym_sec->contents + h->dynindx * bed->s->sizeof_sym; | |
c0d5a53d L |
8930 | if (! check_dynsym (finfo->output_bfd, &sym)) |
8931 | { | |
8932 | eoinfo->failed = TRUE; | |
8933 | return FALSE; | |
8934 | } | |
c152c796 AM |
8935 | bed->s->swap_symbol_out (finfo->output_bfd, &sym, esym, 0); |
8936 | ||
fdc90cb4 JJ |
8937 | if (finfo->hash_sec != NULL) |
8938 | { | |
8939 | size_t hash_entry_size; | |
8940 | bfd_byte *bucketpos; | |
8941 | bfd_vma chain; | |
41198d0c L |
8942 | size_t bucketcount; |
8943 | size_t bucket; | |
8944 | ||
8945 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
8946 | bucket = h->u.elf_hash_value % bucketcount; | |
fdc90cb4 JJ |
8947 | |
8948 | hash_entry_size | |
8949 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; | |
8950 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
8951 | + (bucket + 2) * hash_entry_size); | |
8952 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
8953 | bfd_put (8 * hash_entry_size, finfo->output_bfd, h->dynindx, bucketpos); | |
8954 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, | |
8955 | ((bfd_byte *) finfo->hash_sec->contents | |
8956 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
8957 | } | |
c152c796 AM |
8958 | |
8959 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
8960 | { | |
8961 | Elf_Internal_Versym iversym; | |
8962 | Elf_External_Versym *eversym; | |
8963 | ||
f5385ebf | 8964 | if (!h->def_regular) |
c152c796 AM |
8965 | { |
8966 | if (h->verinfo.verdef == NULL) | |
8967 | iversym.vs_vers = 0; | |
8968 | else | |
8969 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
8970 | } | |
8971 | else | |
8972 | { | |
8973 | if (h->verinfo.vertree == NULL) | |
8974 | iversym.vs_vers = 1; | |
8975 | else | |
8976 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
3e3b46e5 PB |
8977 | if (finfo->info->create_default_symver) |
8978 | iversym.vs_vers++; | |
c152c796 AM |
8979 | } |
8980 | ||
f5385ebf | 8981 | if (h->hidden) |
c152c796 AM |
8982 | iversym.vs_vers |= VERSYM_HIDDEN; |
8983 | ||
8984 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; | |
8985 | eversym += h->dynindx; | |
8986 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
8987 | } | |
8988 | } | |
8989 | ||
8990 | /* If we're stripping it, then it was just a dynamic symbol, and | |
8991 | there's nothing else to do. */ | |
8992 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) | |
8993 | return TRUE; | |
8994 | ||
6e0b88f1 AM |
8995 | indx = bfd_get_symcount (finfo->output_bfd); |
8996 | ret = elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec, h); | |
8997 | if (ret == 0) | |
c152c796 AM |
8998 | { |
8999 | eoinfo->failed = TRUE; | |
9000 | return FALSE; | |
9001 | } | |
6e0b88f1 AM |
9002 | else if (ret == 1) |
9003 | h->indx = indx; | |
9004 | else if (h->indx == -2) | |
9005 | abort(); | |
c152c796 AM |
9006 | |
9007 | return TRUE; | |
9008 | } | |
9009 | ||
cdd3575c AM |
9010 | /* Return TRUE if special handling is done for relocs in SEC against |
9011 | symbols defined in discarded sections. */ | |
9012 | ||
c152c796 AM |
9013 | static bfd_boolean |
9014 | elf_section_ignore_discarded_relocs (asection *sec) | |
9015 | { | |
9016 | const struct elf_backend_data *bed; | |
9017 | ||
cdd3575c AM |
9018 | switch (sec->sec_info_type) |
9019 | { | |
9020 | case ELF_INFO_TYPE_STABS: | |
9021 | case ELF_INFO_TYPE_EH_FRAME: | |
9022 | return TRUE; | |
9023 | default: | |
9024 | break; | |
9025 | } | |
c152c796 AM |
9026 | |
9027 | bed = get_elf_backend_data (sec->owner); | |
9028 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9029 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9030 | return TRUE; | |
9031 | ||
9032 | return FALSE; | |
9033 | } | |
9034 | ||
9e66c942 AM |
9035 | /* Return a mask saying how ld should treat relocations in SEC against |
9036 | symbols defined in discarded sections. If this function returns | |
9037 | COMPLAIN set, ld will issue a warning message. If this function | |
9038 | returns PRETEND set, and the discarded section was link-once and the | |
9039 | same size as the kept link-once section, ld will pretend that the | |
9040 | symbol was actually defined in the kept section. Otherwise ld will | |
9041 | zero the reloc (at least that is the intent, but some cooperation by | |
9042 | the target dependent code is needed, particularly for REL targets). */ | |
9043 | ||
8a696751 AM |
9044 | unsigned int |
9045 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9046 | { |
9e66c942 | 9047 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9048 | return PRETEND; |
cdd3575c AM |
9049 | |
9050 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9051 | return 0; |
cdd3575c AM |
9052 | |
9053 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9054 | return 0; |
cdd3575c | 9055 | |
9e66c942 | 9056 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9057 | } |
9058 | ||
3d7f7666 L |
9059 | /* Find a match between a section and a member of a section group. */ |
9060 | ||
9061 | static asection * | |
c0f00686 L |
9062 | match_group_member (asection *sec, asection *group, |
9063 | struct bfd_link_info *info) | |
3d7f7666 L |
9064 | { |
9065 | asection *first = elf_next_in_group (group); | |
9066 | asection *s = first; | |
9067 | ||
9068 | while (s != NULL) | |
9069 | { | |
c0f00686 | 9070 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9071 | return s; |
9072 | ||
83180ade | 9073 | s = elf_next_in_group (s); |
3d7f7666 L |
9074 | if (s == first) |
9075 | break; | |
9076 | } | |
9077 | ||
9078 | return NULL; | |
9079 | } | |
9080 | ||
01b3c8ab | 9081 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9082 | to replace it. Return the replacement if it is OK. Otherwise return |
9083 | NULL. */ | |
01b3c8ab L |
9084 | |
9085 | asection * | |
c0f00686 | 9086 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9087 | { |
9088 | asection *kept; | |
9089 | ||
9090 | kept = sec->kept_section; | |
9091 | if (kept != NULL) | |
9092 | { | |
c2370991 | 9093 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9094 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9095 | if (kept != NULL |
9096 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9097 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9098 | kept = NULL; |
c2370991 | 9099 | sec->kept_section = kept; |
01b3c8ab L |
9100 | } |
9101 | return kept; | |
9102 | } | |
9103 | ||
c152c796 AM |
9104 | /* Link an input file into the linker output file. This function |
9105 | handles all the sections and relocations of the input file at once. | |
9106 | This is so that we only have to read the local symbols once, and | |
9107 | don't have to keep them in memory. */ | |
9108 | ||
9109 | static bfd_boolean | |
9110 | elf_link_input_bfd (struct elf_final_link_info *finfo, bfd *input_bfd) | |
9111 | { | |
ece5ef60 | 9112 | int (*relocate_section) |
c152c796 AM |
9113 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9114 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9115 | bfd *output_bfd; | |
9116 | Elf_Internal_Shdr *symtab_hdr; | |
9117 | size_t locsymcount; | |
9118 | size_t extsymoff; | |
9119 | Elf_Internal_Sym *isymbuf; | |
9120 | Elf_Internal_Sym *isym; | |
9121 | Elf_Internal_Sym *isymend; | |
9122 | long *pindex; | |
9123 | asection **ppsection; | |
9124 | asection *o; | |
9125 | const struct elf_backend_data *bed; | |
c152c796 | 9126 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9127 | bfd_size_type address_size; |
9128 | bfd_vma r_type_mask; | |
9129 | int r_sym_shift; | |
c152c796 AM |
9130 | |
9131 | output_bfd = finfo->output_bfd; | |
9132 | bed = get_elf_backend_data (output_bfd); | |
9133 | relocate_section = bed->elf_backend_relocate_section; | |
9134 | ||
9135 | /* If this is a dynamic object, we don't want to do anything here: | |
9136 | we don't want the local symbols, and we don't want the section | |
9137 | contents. */ | |
9138 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9139 | return TRUE; | |
9140 | ||
c152c796 AM |
9141 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9142 | if (elf_bad_symtab (input_bfd)) | |
9143 | { | |
9144 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9145 | extsymoff = 0; | |
9146 | } | |
9147 | else | |
9148 | { | |
9149 | locsymcount = symtab_hdr->sh_info; | |
9150 | extsymoff = symtab_hdr->sh_info; | |
9151 | } | |
9152 | ||
9153 | /* Read the local symbols. */ | |
9154 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9155 | if (isymbuf == NULL && locsymcount != 0) | |
9156 | { | |
9157 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
9158 | finfo->internal_syms, | |
9159 | finfo->external_syms, | |
9160 | finfo->locsym_shndx); | |
9161 | if (isymbuf == NULL) | |
9162 | return FALSE; | |
9163 | } | |
9164 | ||
9165 | /* Find local symbol sections and adjust values of symbols in | |
9166 | SEC_MERGE sections. Write out those local symbols we know are | |
9167 | going into the output file. */ | |
9168 | isymend = isymbuf + locsymcount; | |
9169 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
9170 | isym < isymend; | |
9171 | isym++, pindex++, ppsection++) | |
9172 | { | |
9173 | asection *isec; | |
9174 | const char *name; | |
9175 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9176 | long indx; |
9177 | int ret; | |
c152c796 AM |
9178 | |
9179 | *pindex = -1; | |
9180 | ||
9181 | if (elf_bad_symtab (input_bfd)) | |
9182 | { | |
9183 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9184 | { | |
9185 | *ppsection = NULL; | |
9186 | continue; | |
9187 | } | |
9188 | } | |
9189 | ||
9190 | if (isym->st_shndx == SHN_UNDEF) | |
9191 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9192 | else if (isym->st_shndx == SHN_ABS) |
9193 | isec = bfd_abs_section_ptr; | |
9194 | else if (isym->st_shndx == SHN_COMMON) | |
9195 | isec = bfd_com_section_ptr; | |
9196 | else | |
9197 | { | |
cb33740c AM |
9198 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9199 | if (isec == NULL) | |
9200 | { | |
9201 | /* Don't attempt to output symbols with st_shnx in the | |
9202 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9203 | *ppsection = NULL; | |
9204 | continue; | |
9205 | } | |
9206 | else if (isec->sec_info_type == ELF_INFO_TYPE_MERGE | |
9207 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) | |
9208 | isym->st_value = | |
9209 | _bfd_merged_section_offset (output_bfd, &isec, | |
9210 | elf_section_data (isec)->sec_info, | |
9211 | isym->st_value); | |
c152c796 AM |
9212 | } |
9213 | ||
9214 | *ppsection = isec; | |
9215 | ||
9216 | /* Don't output the first, undefined, symbol. */ | |
9217 | if (ppsection == finfo->sections) | |
9218 | continue; | |
9219 | ||
9220 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
9221 | { | |
9222 | /* We never output section symbols. Instead, we use the | |
9223 | section symbol of the corresponding section in the output | |
9224 | file. */ | |
9225 | continue; | |
9226 | } | |
9227 | ||
9228 | /* If we are stripping all symbols, we don't want to output this | |
9229 | one. */ | |
9230 | if (finfo->info->strip == strip_all) | |
9231 | continue; | |
9232 | ||
9233 | /* If we are discarding all local symbols, we don't want to | |
9234 | output this one. If we are generating a relocatable output | |
9235 | file, then some of the local symbols may be required by | |
9236 | relocs; we output them below as we discover that they are | |
9237 | needed. */ | |
9238 | if (finfo->info->discard == discard_all) | |
9239 | continue; | |
9240 | ||
9241 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
9242 | discarding, we don't need to keep it. */ |
9243 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
9244 | && isym->st_shndx < SHN_LORESERVE |
9245 | && bfd_section_removed_from_list (output_bfd, | |
9246 | isec->output_section)) | |
e75a280b L |
9247 | continue; |
9248 | ||
c152c796 AM |
9249 | /* Get the name of the symbol. */ |
9250 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
9251 | isym->st_name); | |
9252 | if (name == NULL) | |
9253 | return FALSE; | |
9254 | ||
9255 | /* See if we are discarding symbols with this name. */ | |
9256 | if ((finfo->info->strip == strip_some | |
9257 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) | |
9258 | == NULL)) | |
9259 | || (((finfo->info->discard == discard_sec_merge | |
9260 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocatable) | |
9261 | || finfo->info->discard == discard_l) | |
9262 | && bfd_is_local_label_name (input_bfd, name))) | |
9263 | continue; | |
9264 | ||
c152c796 AM |
9265 | osym = *isym; |
9266 | ||
9267 | /* Adjust the section index for the output file. */ | |
9268 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9269 | isec->output_section); | |
9270 | if (osym.st_shndx == SHN_BAD) | |
9271 | return FALSE; | |
9272 | ||
c152c796 AM |
9273 | /* ELF symbols in relocatable files are section relative, but |
9274 | in executable files they are virtual addresses. Note that | |
9275 | this code assumes that all ELF sections have an associated | |
9276 | BFD section with a reasonable value for output_offset; below | |
9277 | we assume that they also have a reasonable value for | |
9278 | output_section. Any special sections must be set up to meet | |
9279 | these requirements. */ | |
9280 | osym.st_value += isec->output_offset; | |
9281 | if (! finfo->info->relocatable) | |
9282 | { | |
9283 | osym.st_value += isec->output_section->vma; | |
9284 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
9285 | { | |
9286 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
9287 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); | |
9288 | osym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
9289 | } | |
9290 | } | |
9291 | ||
6e0b88f1 AM |
9292 | indx = bfd_get_symcount (output_bfd); |
9293 | ret = elf_link_output_sym (finfo, name, &osym, isec, NULL); | |
9294 | if (ret == 0) | |
c152c796 | 9295 | return FALSE; |
6e0b88f1 AM |
9296 | else if (ret == 1) |
9297 | *pindex = indx; | |
c152c796 AM |
9298 | } |
9299 | ||
310fd250 L |
9300 | if (bed->s->arch_size == 32) |
9301 | { | |
9302 | r_type_mask = 0xff; | |
9303 | r_sym_shift = 8; | |
9304 | address_size = 4; | |
9305 | } | |
9306 | else | |
9307 | { | |
9308 | r_type_mask = 0xffffffff; | |
9309 | r_sym_shift = 32; | |
9310 | address_size = 8; | |
9311 | } | |
9312 | ||
c152c796 AM |
9313 | /* Relocate the contents of each section. */ |
9314 | sym_hashes = elf_sym_hashes (input_bfd); | |
9315 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
9316 | { | |
9317 | bfd_byte *contents; | |
9318 | ||
9319 | if (! o->linker_mark) | |
9320 | { | |
9321 | /* This section was omitted from the link. */ | |
9322 | continue; | |
9323 | } | |
9324 | ||
bcacc0f5 AM |
9325 | if (finfo->info->relocatable |
9326 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) | |
9327 | { | |
9328 | /* Deal with the group signature symbol. */ | |
9329 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
9330 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
9331 | asection *osec = o->output_section; | |
9332 | ||
9333 | if (symndx >= locsymcount | |
9334 | || (elf_bad_symtab (input_bfd) | |
9335 | && finfo->sections[symndx] == NULL)) | |
9336 | { | |
9337 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
9338 | while (h->root.type == bfd_link_hash_indirect | |
9339 | || h->root.type == bfd_link_hash_warning) | |
9340 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9341 | /* Arrange for symbol to be output. */ | |
9342 | h->indx = -2; | |
9343 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
9344 | } | |
9345 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
9346 | { | |
9347 | /* We'll use the output section target_index. */ | |
9348 | asection *sec = finfo->sections[symndx]->output_section; | |
9349 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; | |
9350 | } | |
9351 | else | |
9352 | { | |
9353 | if (finfo->indices[symndx] == -1) | |
9354 | { | |
9355 | /* Otherwise output the local symbol now. */ | |
9356 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
9357 | asection *sec = finfo->sections[symndx]->output_section; | |
9358 | const char *name; | |
6e0b88f1 AM |
9359 | long indx; |
9360 | int ret; | |
bcacc0f5 AM |
9361 | |
9362 | name = bfd_elf_string_from_elf_section (input_bfd, | |
9363 | symtab_hdr->sh_link, | |
9364 | sym.st_name); | |
9365 | if (name == NULL) | |
9366 | return FALSE; | |
9367 | ||
9368 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9369 | sec); | |
9370 | if (sym.st_shndx == SHN_BAD) | |
9371 | return FALSE; | |
9372 | ||
9373 | sym.st_value += o->output_offset; | |
9374 | ||
6e0b88f1 AM |
9375 | indx = bfd_get_symcount (output_bfd); |
9376 | ret = elf_link_output_sym (finfo, name, &sym, o, NULL); | |
9377 | if (ret == 0) | |
bcacc0f5 | 9378 | return FALSE; |
6e0b88f1 AM |
9379 | else if (ret == 1) |
9380 | finfo->indices[symndx] = indx; | |
9381 | else | |
9382 | abort (); | |
bcacc0f5 AM |
9383 | } |
9384 | elf_section_data (osec)->this_hdr.sh_info | |
9385 | = finfo->indices[symndx]; | |
9386 | } | |
9387 | } | |
9388 | ||
c152c796 | 9389 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 9390 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
9391 | continue; |
9392 | ||
9393 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
9394 | { | |
9395 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
9396 | or somesuch. */ | |
9397 | continue; | |
9398 | } | |
9399 | ||
9400 | /* Get the contents of the section. They have been cached by a | |
9401 | relaxation routine. Note that o is a section in an input | |
9402 | file, so the contents field will not have been set by any of | |
9403 | the routines which work on output files. */ | |
9404 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
9405 | contents = elf_section_data (o)->this_hdr.contents; | |
9406 | else | |
9407 | { | |
9408 | contents = finfo->contents; | |
4a114e3e | 9409 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
9410 | return FALSE; |
9411 | } | |
9412 | ||
9413 | if ((o->flags & SEC_RELOC) != 0) | |
9414 | { | |
9415 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 9416 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 9417 | int action_discarded; |
ece5ef60 | 9418 | int ret; |
c152c796 AM |
9419 | |
9420 | /* Get the swapped relocs. */ | |
9421 | internal_relocs | |
9422 | = _bfd_elf_link_read_relocs (input_bfd, o, finfo->external_relocs, | |
9423 | finfo->internal_relocs, FALSE); | |
9424 | if (internal_relocs == NULL | |
9425 | && o->reloc_count > 0) | |
9426 | return FALSE; | |
9427 | ||
310fd250 L |
9428 | /* We need to reverse-copy input .ctors/.dtors sections if |
9429 | they are placed in .init_array/.finit_array for output. */ | |
9430 | if (o->size > address_size | |
9431 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
9432 | && strcmp (o->output_section->name, | |
9433 | ".init_array") == 0) | |
9434 | || (strncmp (o->name, ".dtors", 6) == 0 | |
9435 | && strcmp (o->output_section->name, | |
9436 | ".fini_array") == 0)) | |
9437 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 9438 | { |
310fd250 L |
9439 | if (o->size != o->reloc_count * address_size) |
9440 | { | |
9441 | (*_bfd_error_handler) | |
9442 | (_("error: %B: size of section %A is not " | |
9443 | "multiple of address size"), | |
9444 | input_bfd, o); | |
9445 | bfd_set_error (bfd_error_on_input); | |
9446 | return FALSE; | |
9447 | } | |
9448 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
9449 | } |
9450 | ||
0f02bbd9 | 9451 | action_discarded = -1; |
c152c796 | 9452 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
9453 | action_discarded = (*bed->action_discarded) (o); |
9454 | ||
9455 | /* Run through the relocs evaluating complex reloc symbols and | |
9456 | looking for relocs against symbols from discarded sections | |
9457 | or section symbols from removed link-once sections. | |
9458 | Complain about relocs against discarded sections. Zero | |
9459 | relocs against removed link-once sections. */ | |
9460 | ||
9461 | rel = internal_relocs; | |
9462 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
9463 | for ( ; rel < relend; rel++) | |
c152c796 | 9464 | { |
0f02bbd9 AM |
9465 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
9466 | unsigned int s_type; | |
9467 | asection **ps, *sec; | |
9468 | struct elf_link_hash_entry *h = NULL; | |
9469 | const char *sym_name; | |
c152c796 | 9470 | |
0f02bbd9 AM |
9471 | if (r_symndx == STN_UNDEF) |
9472 | continue; | |
c152c796 | 9473 | |
0f02bbd9 AM |
9474 | if (r_symndx >= locsymcount |
9475 | || (elf_bad_symtab (input_bfd) | |
9476 | && finfo->sections[r_symndx] == NULL)) | |
9477 | { | |
9478 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 9479 | |
0f02bbd9 AM |
9480 | /* Badly formatted input files can contain relocs that |
9481 | reference non-existant symbols. Check here so that | |
9482 | we do not seg fault. */ | |
9483 | if (h == NULL) | |
c152c796 | 9484 | { |
0f02bbd9 | 9485 | char buffer [32]; |
dce669a1 | 9486 | |
0f02bbd9 AM |
9487 | sprintf_vma (buffer, rel->r_info); |
9488 | (*_bfd_error_handler) | |
9489 | (_("error: %B contains a reloc (0x%s) for section %A " | |
9490 | "that references a non-existent global symbol"), | |
9491 | input_bfd, o, buffer); | |
9492 | bfd_set_error (bfd_error_bad_value); | |
9493 | return FALSE; | |
9494 | } | |
3b36f7e6 | 9495 | |
0f02bbd9 AM |
9496 | while (h->root.type == bfd_link_hash_indirect |
9497 | || h->root.type == bfd_link_hash_warning) | |
9498 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 9499 | |
0f02bbd9 | 9500 | s_type = h->type; |
cdd3575c | 9501 | |
0f02bbd9 AM |
9502 | ps = NULL; |
9503 | if (h->root.type == bfd_link_hash_defined | |
9504 | || h->root.type == bfd_link_hash_defweak) | |
9505 | ps = &h->root.u.def.section; | |
9506 | ||
9507 | sym_name = h->root.root.string; | |
9508 | } | |
9509 | else | |
9510 | { | |
9511 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
9512 | ||
9513 | s_type = ELF_ST_TYPE (sym->st_info); | |
9514 | ps = &finfo->sections[r_symndx]; | |
9515 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
9516 | sym, *ps); | |
9517 | } | |
c152c796 | 9518 | |
c301e700 DD |
9519 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
9520 | && !finfo->info->relocatable) | |
0f02bbd9 AM |
9521 | { |
9522 | bfd_vma val; | |
9523 | bfd_vma dot = (rel->r_offset | |
9524 | + o->output_offset + o->output_section->vma); | |
9525 | #ifdef DEBUG | |
9526 | printf ("Encountered a complex symbol!"); | |
9527 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
9528 | input_bfd->filename, o->name, |
9529 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
9530 | printf (" symbol: idx %8.8lx, name %s\n", |
9531 | r_symndx, sym_name); | |
9532 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
9533 | (unsigned long) rel->r_info, | |
9534 | (unsigned long) rel->r_offset); | |
9535 | #endif | |
9536 | if (!eval_symbol (&val, &sym_name, input_bfd, finfo, dot, | |
9537 | isymbuf, locsymcount, s_type == STT_SRELC)) | |
9538 | return FALSE; | |
9539 | ||
9540 | /* Symbol evaluated OK. Update to absolute value. */ | |
9541 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
9542 | r_symndx, val); | |
9543 | continue; | |
9544 | } | |
9545 | ||
9546 | if (action_discarded != -1 && ps != NULL) | |
9547 | { | |
cdd3575c AM |
9548 | /* Complain if the definition comes from a |
9549 | discarded section. */ | |
9550 | if ((sec = *ps) != NULL && elf_discarded_section (sec)) | |
9551 | { | |
cf35638d | 9552 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 9553 | if (action_discarded & COMPLAIN) |
e1fffbe6 AM |
9554 | (*finfo->info->callbacks->einfo) |
9555 | (_("%X`%s' referenced in section `%A' of %B: " | |
58ac56d0 | 9556 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 9557 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 9558 | |
87e5235d | 9559 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 9560 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
9561 | really defined in the kept linkonce section. |
9562 | FIXME: This is quite broken. Modifying the | |
9563 | symbol here means we will be changing all later | |
e0ae6d6f | 9564 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 9565 | if (action_discarded & PRETEND) |
87e5235d | 9566 | { |
01b3c8ab L |
9567 | asection *kept; |
9568 | ||
c0f00686 L |
9569 | kept = _bfd_elf_check_kept_section (sec, |
9570 | finfo->info); | |
01b3c8ab | 9571 | if (kept != NULL) |
87e5235d AM |
9572 | { |
9573 | *ps = kept; | |
9574 | continue; | |
9575 | } | |
9576 | } | |
c152c796 AM |
9577 | } |
9578 | } | |
9579 | } | |
9580 | ||
9581 | /* Relocate the section by invoking a back end routine. | |
9582 | ||
9583 | The back end routine is responsible for adjusting the | |
9584 | section contents as necessary, and (if using Rela relocs | |
9585 | and generating a relocatable output file) adjusting the | |
9586 | reloc addend as necessary. | |
9587 | ||
9588 | The back end routine does not have to worry about setting | |
9589 | the reloc address or the reloc symbol index. | |
9590 | ||
9591 | The back end routine is given a pointer to the swapped in | |
9592 | internal symbols, and can access the hash table entries | |
9593 | for the external symbols via elf_sym_hashes (input_bfd). | |
9594 | ||
9595 | When generating relocatable output, the back end routine | |
9596 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
9597 | output symbol is going to be a section symbol | |
9598 | corresponding to the output section, which will require | |
9599 | the addend to be adjusted. */ | |
9600 | ||
ece5ef60 | 9601 | ret = (*relocate_section) (output_bfd, finfo->info, |
c152c796 AM |
9602 | input_bfd, o, contents, |
9603 | internal_relocs, | |
9604 | isymbuf, | |
ece5ef60 AM |
9605 | finfo->sections); |
9606 | if (!ret) | |
c152c796 AM |
9607 | return FALSE; |
9608 | ||
ece5ef60 AM |
9609 | if (ret == 2 |
9610 | || finfo->info->relocatable | |
9611 | || finfo->info->emitrelocations) | |
c152c796 AM |
9612 | { |
9613 | Elf_Internal_Rela *irela; | |
d4730f92 | 9614 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
9615 | bfd_vma last_offset; |
9616 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
9617 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
9618 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 9619 | unsigned int next_erel; |
c152c796 | 9620 | bfd_boolean rela_normal; |
d4730f92 | 9621 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 9622 | |
d4730f92 BS |
9623 | esdi = elf_section_data (o); |
9624 | esdo = elf_section_data (o->output_section); | |
9625 | rela_normal = FALSE; | |
c152c796 AM |
9626 | |
9627 | /* Adjust the reloc addresses and symbol indices. */ | |
9628 | ||
9629 | irela = internal_relocs; | |
9630 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
9631 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
9632 | /* We start processing the REL relocs, if any. When we reach | |
9633 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
9634 | irelamid = irela; | |
9635 | if (esdi->rel.hdr != NULL) | |
9636 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
9637 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 9638 | rel_hash_list = rel_hash; |
d4730f92 | 9639 | rela_hash_list = NULL; |
c152c796 AM |
9640 | last_offset = o->output_offset; |
9641 | if (!finfo->info->relocatable) | |
9642 | last_offset += o->output_section->vma; | |
9643 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
9644 | { | |
9645 | unsigned long r_symndx; | |
9646 | asection *sec; | |
9647 | Elf_Internal_Sym sym; | |
9648 | ||
9649 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
9650 | { | |
9651 | rel_hash++; | |
9652 | next_erel = 0; | |
9653 | } | |
9654 | ||
d4730f92 BS |
9655 | if (irela == irelamid) |
9656 | { | |
9657 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
9658 | rela_hash_list = rel_hash; | |
9659 | rela_normal = bed->rela_normal; | |
9660 | } | |
9661 | ||
c152c796 AM |
9662 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
9663 | finfo->info, o, | |
9664 | irela->r_offset); | |
9665 | if (irela->r_offset >= (bfd_vma) -2) | |
9666 | { | |
9667 | /* This is a reloc for a deleted entry or somesuch. | |
9668 | Turn it into an R_*_NONE reloc, at the same | |
9669 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 9670 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
9671 | being ordered. */ |
9672 | irela->r_offset = last_offset; | |
9673 | irela->r_info = 0; | |
9674 | irela->r_addend = 0; | |
9675 | continue; | |
9676 | } | |
9677 | ||
9678 | irela->r_offset += o->output_offset; | |
9679 | ||
9680 | /* Relocs in an executable have to be virtual addresses. */ | |
9681 | if (!finfo->info->relocatable) | |
9682 | irela->r_offset += o->output_section->vma; | |
9683 | ||
9684 | last_offset = irela->r_offset; | |
9685 | ||
9686 | r_symndx = irela->r_info >> r_sym_shift; | |
9687 | if (r_symndx == STN_UNDEF) | |
9688 | continue; | |
9689 | ||
9690 | if (r_symndx >= locsymcount | |
9691 | || (elf_bad_symtab (input_bfd) | |
9692 | && finfo->sections[r_symndx] == NULL)) | |
9693 | { | |
9694 | struct elf_link_hash_entry *rh; | |
9695 | unsigned long indx; | |
9696 | ||
9697 | /* This is a reloc against a global symbol. We | |
9698 | have not yet output all the local symbols, so | |
9699 | we do not know the symbol index of any global | |
9700 | symbol. We set the rel_hash entry for this | |
9701 | reloc to point to the global hash table entry | |
9702 | for this symbol. The symbol index is then | |
ee75fd95 | 9703 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
9704 | indx = r_symndx - extsymoff; |
9705 | rh = elf_sym_hashes (input_bfd)[indx]; | |
9706 | while (rh->root.type == bfd_link_hash_indirect | |
9707 | || rh->root.type == bfd_link_hash_warning) | |
9708 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
9709 | ||
9710 | /* Setting the index to -2 tells | |
9711 | elf_link_output_extsym that this symbol is | |
9712 | used by a reloc. */ | |
9713 | BFD_ASSERT (rh->indx < 0); | |
9714 | rh->indx = -2; | |
9715 | ||
9716 | *rel_hash = rh; | |
9717 | ||
9718 | continue; | |
9719 | } | |
9720 | ||
9721 | /* This is a reloc against a local symbol. */ | |
9722 | ||
9723 | *rel_hash = NULL; | |
9724 | sym = isymbuf[r_symndx]; | |
9725 | sec = finfo->sections[r_symndx]; | |
9726 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) | |
9727 | { | |
9728 | /* I suppose the backend ought to fill in the | |
9729 | section of any STT_SECTION symbol against a | |
6a8d1586 | 9730 | processor specific section. */ |
cf35638d | 9731 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
9732 | if (bfd_is_abs_section (sec)) |
9733 | ; | |
c152c796 AM |
9734 | else if (sec == NULL || sec->owner == NULL) |
9735 | { | |
9736 | bfd_set_error (bfd_error_bad_value); | |
9737 | return FALSE; | |
9738 | } | |
9739 | else | |
9740 | { | |
6a8d1586 AM |
9741 | asection *osec = sec->output_section; |
9742 | ||
9743 | /* If we have discarded a section, the output | |
9744 | section will be the absolute section. In | |
ab96bf03 AM |
9745 | case of discarded SEC_MERGE sections, use |
9746 | the kept section. relocate_section should | |
9747 | have already handled discarded linkonce | |
9748 | sections. */ | |
6a8d1586 AM |
9749 | if (bfd_is_abs_section (osec) |
9750 | && sec->kept_section != NULL | |
9751 | && sec->kept_section->output_section != NULL) | |
9752 | { | |
9753 | osec = sec->kept_section->output_section; | |
9754 | irela->r_addend -= osec->vma; | |
9755 | } | |
9756 | ||
9757 | if (!bfd_is_abs_section (osec)) | |
9758 | { | |
9759 | r_symndx = osec->target_index; | |
cf35638d | 9760 | if (r_symndx == STN_UNDEF) |
74541ad4 AM |
9761 | { |
9762 | struct elf_link_hash_table *htab; | |
9763 | asection *oi; | |
9764 | ||
9765 | htab = elf_hash_table (finfo->info); | |
9766 | oi = htab->text_index_section; | |
9767 | if ((osec->flags & SEC_READONLY) == 0 | |
9768 | && htab->data_index_section != NULL) | |
9769 | oi = htab->data_index_section; | |
9770 | ||
9771 | if (oi != NULL) | |
9772 | { | |
9773 | irela->r_addend += osec->vma - oi->vma; | |
9774 | r_symndx = oi->target_index; | |
9775 | } | |
9776 | } | |
9777 | ||
cf35638d | 9778 | BFD_ASSERT (r_symndx != STN_UNDEF); |
6a8d1586 | 9779 | } |
c152c796 AM |
9780 | } |
9781 | ||
9782 | /* Adjust the addend according to where the | |
9783 | section winds up in the output section. */ | |
9784 | if (rela_normal) | |
9785 | irela->r_addend += sec->output_offset; | |
9786 | } | |
9787 | else | |
9788 | { | |
9789 | if (finfo->indices[r_symndx] == -1) | |
9790 | { | |
9791 | unsigned long shlink; | |
9792 | const char *name; | |
9793 | asection *osec; | |
6e0b88f1 | 9794 | long indx; |
c152c796 AM |
9795 | |
9796 | if (finfo->info->strip == strip_all) | |
9797 | { | |
9798 | /* You can't do ld -r -s. */ | |
9799 | bfd_set_error (bfd_error_invalid_operation); | |
9800 | return FALSE; | |
9801 | } | |
9802 | ||
9803 | /* This symbol was skipped earlier, but | |
9804 | since it is needed by a reloc, we | |
9805 | must output it now. */ | |
9806 | shlink = symtab_hdr->sh_link; | |
9807 | name = (bfd_elf_string_from_elf_section | |
9808 | (input_bfd, shlink, sym.st_name)); | |
9809 | if (name == NULL) | |
9810 | return FALSE; | |
9811 | ||
9812 | osec = sec->output_section; | |
9813 | sym.st_shndx = | |
9814 | _bfd_elf_section_from_bfd_section (output_bfd, | |
9815 | osec); | |
9816 | if (sym.st_shndx == SHN_BAD) | |
9817 | return FALSE; | |
9818 | ||
9819 | sym.st_value += sec->output_offset; | |
9820 | if (! finfo->info->relocatable) | |
9821 | { | |
9822 | sym.st_value += osec->vma; | |
9823 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
9824 | { | |
9825 | /* STT_TLS symbols are relative to PT_TLS | |
9826 | segment base. */ | |
9827 | BFD_ASSERT (elf_hash_table (finfo->info) | |
9828 | ->tls_sec != NULL); | |
9829 | sym.st_value -= (elf_hash_table (finfo->info) | |
9830 | ->tls_sec->vma); | |
9831 | } | |
9832 | } | |
9833 | ||
6e0b88f1 AM |
9834 | indx = bfd_get_symcount (output_bfd); |
9835 | ret = elf_link_output_sym (finfo, name, &sym, sec, | |
9836 | NULL); | |
9837 | if (ret == 0) | |
c152c796 | 9838 | return FALSE; |
6e0b88f1 AM |
9839 | else if (ret == 1) |
9840 | finfo->indices[r_symndx] = indx; | |
9841 | else | |
9842 | abort (); | |
c152c796 AM |
9843 | } |
9844 | ||
9845 | r_symndx = finfo->indices[r_symndx]; | |
9846 | } | |
9847 | ||
9848 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
9849 | | (irela->r_info & r_type_mask)); | |
9850 | } | |
9851 | ||
9852 | /* Swap out the relocs. */ | |
d4730f92 BS |
9853 | input_rel_hdr = esdi->rel.hdr; |
9854 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 9855 | { |
d4730f92 BS |
9856 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
9857 | input_rel_hdr, | |
9858 | internal_relocs, | |
9859 | rel_hash_list)) | |
9860 | return FALSE; | |
c152c796 AM |
9861 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
9862 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 9863 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
9864 | } |
9865 | ||
9866 | input_rela_hdr = esdi->rela.hdr; | |
9867 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
9868 | { | |
eac338cf | 9869 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 9870 | input_rela_hdr, |
eac338cf | 9871 | internal_relocs, |
d4730f92 | 9872 | rela_hash_list)) |
c152c796 AM |
9873 | return FALSE; |
9874 | } | |
9875 | } | |
9876 | } | |
9877 | ||
9878 | /* Write out the modified section contents. */ | |
9879 | if (bed->elf_backend_write_section | |
c7b8f16e JB |
9880 | && (*bed->elf_backend_write_section) (output_bfd, finfo->info, o, |
9881 | contents)) | |
c152c796 AM |
9882 | { |
9883 | /* Section written out. */ | |
9884 | } | |
9885 | else switch (o->sec_info_type) | |
9886 | { | |
9887 | case ELF_INFO_TYPE_STABS: | |
9888 | if (! (_bfd_write_section_stabs | |
9889 | (output_bfd, | |
9890 | &elf_hash_table (finfo->info)->stab_info, | |
9891 | o, &elf_section_data (o)->sec_info, contents))) | |
9892 | return FALSE; | |
9893 | break; | |
9894 | case ELF_INFO_TYPE_MERGE: | |
9895 | if (! _bfd_write_merged_section (output_bfd, o, | |
9896 | elf_section_data (o)->sec_info)) | |
9897 | return FALSE; | |
9898 | break; | |
9899 | case ELF_INFO_TYPE_EH_FRAME: | |
9900 | { | |
9901 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, | |
9902 | o, contents)) | |
9903 | return FALSE; | |
9904 | } | |
9905 | break; | |
9906 | default: | |
9907 | { | |
5dabe785 | 9908 | /* FIXME: octets_per_byte. */ |
310fd250 L |
9909 | if (! (o->flags & SEC_EXCLUDE)) |
9910 | { | |
9911 | file_ptr offset = (file_ptr) o->output_offset; | |
9912 | bfd_size_type todo = o->size; | |
9913 | if ((o->flags & SEC_ELF_REVERSE_COPY)) | |
9914 | { | |
9915 | /* Reverse-copy input section to output. */ | |
9916 | do | |
9917 | { | |
9918 | todo -= address_size; | |
9919 | if (! bfd_set_section_contents (output_bfd, | |
9920 | o->output_section, | |
9921 | contents + todo, | |
9922 | offset, | |
9923 | address_size)) | |
9924 | return FALSE; | |
9925 | if (todo == 0) | |
9926 | break; | |
9927 | offset += address_size; | |
9928 | } | |
9929 | while (1); | |
9930 | } | |
9931 | else if (! bfd_set_section_contents (output_bfd, | |
9932 | o->output_section, | |
9933 | contents, | |
9934 | offset, todo)) | |
9935 | return FALSE; | |
9936 | } | |
c152c796 AM |
9937 | } |
9938 | break; | |
9939 | } | |
9940 | } | |
9941 | ||
9942 | return TRUE; | |
9943 | } | |
9944 | ||
9945 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 9946 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
9947 | is used to build constructor and destructor tables when linking |
9948 | with -Ur. */ | |
9949 | ||
9950 | static bfd_boolean | |
9951 | elf_reloc_link_order (bfd *output_bfd, | |
9952 | struct bfd_link_info *info, | |
9953 | asection *output_section, | |
9954 | struct bfd_link_order *link_order) | |
9955 | { | |
9956 | reloc_howto_type *howto; | |
9957 | long indx; | |
9958 | bfd_vma offset; | |
9959 | bfd_vma addend; | |
d4730f92 | 9960 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
9961 | struct elf_link_hash_entry **rel_hash_ptr; |
9962 | Elf_Internal_Shdr *rel_hdr; | |
9963 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
9964 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
9965 | bfd_byte *erel; | |
9966 | unsigned int i; | |
d4730f92 | 9967 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
9968 | |
9969 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
9970 | if (howto == NULL) | |
9971 | { | |
9972 | bfd_set_error (bfd_error_bad_value); | |
9973 | return FALSE; | |
9974 | } | |
9975 | ||
9976 | addend = link_order->u.reloc.p->addend; | |
9977 | ||
d4730f92 BS |
9978 | if (esdo->rel.hdr) |
9979 | reldata = &esdo->rel; | |
9980 | else if (esdo->rela.hdr) | |
9981 | reldata = &esdo->rela; | |
9982 | else | |
9983 | { | |
9984 | reldata = NULL; | |
9985 | BFD_ASSERT (0); | |
9986 | } | |
9987 | ||
c152c796 | 9988 | /* Figure out the symbol index. */ |
d4730f92 | 9989 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
9990 | if (link_order->type == bfd_section_reloc_link_order) |
9991 | { | |
9992 | indx = link_order->u.reloc.p->u.section->target_index; | |
9993 | BFD_ASSERT (indx != 0); | |
9994 | *rel_hash_ptr = NULL; | |
9995 | } | |
9996 | else | |
9997 | { | |
9998 | struct elf_link_hash_entry *h; | |
9999 | ||
10000 | /* Treat a reloc against a defined symbol as though it were | |
10001 | actually against the section. */ | |
10002 | h = ((struct elf_link_hash_entry *) | |
10003 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10004 | link_order->u.reloc.p->u.name, | |
10005 | FALSE, FALSE, TRUE)); | |
10006 | if (h != NULL | |
10007 | && (h->root.type == bfd_link_hash_defined | |
10008 | || h->root.type == bfd_link_hash_defweak)) | |
10009 | { | |
10010 | asection *section; | |
10011 | ||
10012 | section = h->root.u.def.section; | |
10013 | indx = section->output_section->target_index; | |
10014 | *rel_hash_ptr = NULL; | |
10015 | /* It seems that we ought to add the symbol value to the | |
10016 | addend here, but in practice it has already been added | |
10017 | because it was passed to constructor_callback. */ | |
10018 | addend += section->output_section->vma + section->output_offset; | |
10019 | } | |
10020 | else if (h != NULL) | |
10021 | { | |
10022 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10023 | this symbol is used by a reloc. */ | |
10024 | h->indx = -2; | |
10025 | *rel_hash_ptr = h; | |
10026 | indx = 0; | |
10027 | } | |
10028 | else | |
10029 | { | |
10030 | if (! ((*info->callbacks->unattached_reloc) | |
10031 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) | |
10032 | return FALSE; | |
10033 | indx = 0; | |
10034 | } | |
10035 | } | |
10036 | ||
10037 | /* If this is an inplace reloc, we must write the addend into the | |
10038 | object file. */ | |
10039 | if (howto->partial_inplace && addend != 0) | |
10040 | { | |
10041 | bfd_size_type size; | |
10042 | bfd_reloc_status_type rstat; | |
10043 | bfd_byte *buf; | |
10044 | bfd_boolean ok; | |
10045 | const char *sym_name; | |
10046 | ||
a50b1753 NC |
10047 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10048 | buf = (bfd_byte *) bfd_zmalloc (size); | |
c152c796 AM |
10049 | if (buf == NULL) |
10050 | return FALSE; | |
10051 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10052 | switch (rstat) | |
10053 | { | |
10054 | case bfd_reloc_ok: | |
10055 | break; | |
10056 | ||
10057 | default: | |
10058 | case bfd_reloc_outofrange: | |
10059 | abort (); | |
10060 | ||
10061 | case bfd_reloc_overflow: | |
10062 | if (link_order->type == bfd_section_reloc_link_order) | |
10063 | sym_name = bfd_section_name (output_bfd, | |
10064 | link_order->u.reloc.p->u.section); | |
10065 | else | |
10066 | sym_name = link_order->u.reloc.p->u.name; | |
10067 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
10068 | (info, NULL, sym_name, howto->name, addend, NULL, |
10069 | NULL, (bfd_vma) 0))) | |
c152c796 AM |
10070 | { |
10071 | free (buf); | |
10072 | return FALSE; | |
10073 | } | |
10074 | break; | |
10075 | } | |
10076 | ok = bfd_set_section_contents (output_bfd, output_section, buf, | |
10077 | link_order->offset, size); | |
10078 | free (buf); | |
10079 | if (! ok) | |
10080 | return FALSE; | |
10081 | } | |
10082 | ||
10083 | /* The address of a reloc is relative to the section in a | |
10084 | relocatable file, and is a virtual address in an executable | |
10085 | file. */ | |
10086 | offset = link_order->offset; | |
10087 | if (! info->relocatable) | |
10088 | offset += output_section->vma; | |
10089 | ||
10090 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10091 | { | |
10092 | irel[i].r_offset = offset; | |
10093 | irel[i].r_info = 0; | |
10094 | irel[i].r_addend = 0; | |
10095 | } | |
10096 | if (bed->s->arch_size == 32) | |
10097 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10098 | else | |
10099 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10100 | ||
d4730f92 | 10101 | rel_hdr = reldata->hdr; |
c152c796 AM |
10102 | erel = rel_hdr->contents; |
10103 | if (rel_hdr->sh_type == SHT_REL) | |
10104 | { | |
d4730f92 | 10105 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10106 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10107 | } | |
10108 | else | |
10109 | { | |
10110 | irel[0].r_addend = addend; | |
d4730f92 | 10111 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10112 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10113 | } | |
10114 | ||
d4730f92 | 10115 | ++reldata->count; |
c152c796 AM |
10116 | |
10117 | return TRUE; | |
10118 | } | |
10119 | ||
0b52efa6 PB |
10120 | |
10121 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10122 | ||
10123 | static bfd_vma | |
10124 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10125 | { | |
10126 | Elf_Internal_Shdr **elf_shdrp; | |
10127 | asection *s; | |
10128 | int elfsec; | |
10129 | ||
10130 | s = p->u.indirect.section; | |
10131 | elf_shdrp = elf_elfsections (s->owner); | |
10132 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10133 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10134 | /* PR 290: |
10135 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10136 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10137 | sh_info fields. Hence we could get the situation |
10138 | where elfsec is 0. */ | |
10139 | if (elfsec == 0) | |
10140 | { | |
10141 | const struct elf_backend_data *bed | |
10142 | = get_elf_backend_data (s->owner); | |
10143 | if (bed->link_order_error_handler) | |
d003868e AM |
10144 | bed->link_order_error_handler |
10145 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); | |
185d09ad L |
10146 | return 0; |
10147 | } | |
10148 | else | |
10149 | { | |
10150 | s = elf_shdrp[elfsec]->bfd_section; | |
10151 | return s->output_section->vma + s->output_offset; | |
10152 | } | |
0b52efa6 PB |
10153 | } |
10154 | ||
10155 | ||
10156 | /* Compare two sections based on the locations of the sections they are | |
10157 | linked to. Used by elf_fixup_link_order. */ | |
10158 | ||
10159 | static int | |
10160 | compare_link_order (const void * a, const void * b) | |
10161 | { | |
10162 | bfd_vma apos; | |
10163 | bfd_vma bpos; | |
10164 | ||
10165 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
10166 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
10167 | if (apos < bpos) | |
10168 | return -1; | |
10169 | return apos > bpos; | |
10170 | } | |
10171 | ||
10172 | ||
10173 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
10174 | order as their linked sections. Returns false if this could not be done | |
10175 | because an output section includes both ordered and unordered | |
10176 | sections. Ideally we'd do this in the linker proper. */ | |
10177 | ||
10178 | static bfd_boolean | |
10179 | elf_fixup_link_order (bfd *abfd, asection *o) | |
10180 | { | |
10181 | int seen_linkorder; | |
10182 | int seen_other; | |
10183 | int n; | |
10184 | struct bfd_link_order *p; | |
10185 | bfd *sub; | |
10186 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 10187 | unsigned elfsec; |
0b52efa6 | 10188 | struct bfd_link_order **sections; |
d33cdfe3 | 10189 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 10190 | bfd_vma offset; |
3b36f7e6 | 10191 | |
d33cdfe3 L |
10192 | other_sec = NULL; |
10193 | linkorder_sec = NULL; | |
0b52efa6 PB |
10194 | seen_other = 0; |
10195 | seen_linkorder = 0; | |
8423293d | 10196 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 10197 | { |
d33cdfe3 | 10198 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
10199 | { |
10200 | s = p->u.indirect.section; | |
d33cdfe3 L |
10201 | sub = s->owner; |
10202 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
10203 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
10204 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
10205 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
10206 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
10207 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
10208 | { |
10209 | seen_linkorder++; | |
10210 | linkorder_sec = s; | |
10211 | } | |
0b52efa6 | 10212 | else |
d33cdfe3 L |
10213 | { |
10214 | seen_other++; | |
10215 | other_sec = s; | |
10216 | } | |
0b52efa6 PB |
10217 | } |
10218 | else | |
10219 | seen_other++; | |
d33cdfe3 L |
10220 | |
10221 | if (seen_other && seen_linkorder) | |
10222 | { | |
10223 | if (other_sec && linkorder_sec) | |
10224 | (*_bfd_error_handler) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"), | |
10225 | o, linkorder_sec, | |
10226 | linkorder_sec->owner, other_sec, | |
10227 | other_sec->owner); | |
10228 | else | |
10229 | (*_bfd_error_handler) (_("%A has both ordered and unordered sections"), | |
10230 | o); | |
10231 | bfd_set_error (bfd_error_bad_value); | |
10232 | return FALSE; | |
10233 | } | |
0b52efa6 PB |
10234 | } |
10235 | ||
10236 | if (!seen_linkorder) | |
10237 | return TRUE; | |
10238 | ||
0b52efa6 | 10239 | sections = (struct bfd_link_order **) |
14b1c01e AM |
10240 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
10241 | if (sections == NULL) | |
10242 | return FALSE; | |
0b52efa6 | 10243 | seen_linkorder = 0; |
3b36f7e6 | 10244 | |
8423293d | 10245 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
10246 | { |
10247 | sections[seen_linkorder++] = p; | |
10248 | } | |
10249 | /* Sort the input sections in the order of their linked section. */ | |
10250 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
10251 | compare_link_order); | |
10252 | ||
10253 | /* Change the offsets of the sections. */ | |
10254 | offset = 0; | |
10255 | for (n = 0; n < seen_linkorder; n++) | |
10256 | { | |
10257 | s = sections[n]->u.indirect.section; | |
461686a3 | 10258 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
0b52efa6 PB |
10259 | s->output_offset = offset; |
10260 | sections[n]->offset = offset; | |
5dabe785 | 10261 | /* FIXME: octets_per_byte. */ |
0b52efa6 PB |
10262 | offset += sections[n]->size; |
10263 | } | |
10264 | ||
4dd07732 | 10265 | free (sections); |
0b52efa6 PB |
10266 | return TRUE; |
10267 | } | |
10268 | ||
10269 | ||
c152c796 AM |
10270 | /* Do the final step of an ELF link. */ |
10271 | ||
10272 | bfd_boolean | |
10273 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
10274 | { | |
10275 | bfd_boolean dynamic; | |
10276 | bfd_boolean emit_relocs; | |
10277 | bfd *dynobj; | |
10278 | struct elf_final_link_info finfo; | |
91d6fa6a NC |
10279 | asection *o; |
10280 | struct bfd_link_order *p; | |
10281 | bfd *sub; | |
c152c796 AM |
10282 | bfd_size_type max_contents_size; |
10283 | bfd_size_type max_external_reloc_size; | |
10284 | bfd_size_type max_internal_reloc_count; | |
10285 | bfd_size_type max_sym_count; | |
10286 | bfd_size_type max_sym_shndx_count; | |
10287 | file_ptr off; | |
10288 | Elf_Internal_Sym elfsym; | |
10289 | unsigned int i; | |
10290 | Elf_Internal_Shdr *symtab_hdr; | |
10291 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
10292 | Elf_Internal_Shdr *symstrtab_hdr; | |
10293 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
10294 | struct elf_outext_info eoinfo; | |
10295 | bfd_boolean merged; | |
10296 | size_t relativecount = 0; | |
10297 | asection *reldyn = 0; | |
10298 | bfd_size_type amt; | |
104d59d1 JM |
10299 | asection *attr_section = NULL; |
10300 | bfd_vma attr_size = 0; | |
10301 | const char *std_attrs_section; | |
c152c796 AM |
10302 | |
10303 | if (! is_elf_hash_table (info->hash)) | |
10304 | return FALSE; | |
10305 | ||
10306 | if (info->shared) | |
10307 | abfd->flags |= DYNAMIC; | |
10308 | ||
10309 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
10310 | dynobj = elf_hash_table (info)->dynobj; | |
10311 | ||
10312 | emit_relocs = (info->relocatable | |
a4676736 | 10313 | || info->emitrelocations); |
c152c796 AM |
10314 | |
10315 | finfo.info = info; | |
10316 | finfo.output_bfd = abfd; | |
10317 | finfo.symstrtab = _bfd_elf_stringtab_init (); | |
10318 | if (finfo.symstrtab == NULL) | |
10319 | return FALSE; | |
10320 | ||
10321 | if (! dynamic) | |
10322 | { | |
10323 | finfo.dynsym_sec = NULL; | |
10324 | finfo.hash_sec = NULL; | |
10325 | finfo.symver_sec = NULL; | |
10326 | } | |
10327 | else | |
10328 | { | |
10329 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
10330 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
fdc90cb4 | 10331 | BFD_ASSERT (finfo.dynsym_sec != NULL); |
c152c796 AM |
10332 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); |
10333 | /* Note that it is OK if symver_sec is NULL. */ | |
10334 | } | |
10335 | ||
10336 | finfo.contents = NULL; | |
10337 | finfo.external_relocs = NULL; | |
10338 | finfo.internal_relocs = NULL; | |
10339 | finfo.external_syms = NULL; | |
10340 | finfo.locsym_shndx = NULL; | |
10341 | finfo.internal_syms = NULL; | |
10342 | finfo.indices = NULL; | |
10343 | finfo.sections = NULL; | |
10344 | finfo.symbuf = NULL; | |
10345 | finfo.symshndxbuf = NULL; | |
10346 | finfo.symbuf_count = 0; | |
10347 | finfo.shndxbuf_size = 0; | |
10348 | ||
104d59d1 JM |
10349 | /* The object attributes have been merged. Remove the input |
10350 | sections from the link, and set the contents of the output | |
10351 | secton. */ | |
10352 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
10353 | for (o = abfd->sections; o != NULL; o = o->next) | |
10354 | { | |
10355 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
10356 | || strcmp (o->name, ".gnu.attributes") == 0) | |
10357 | { | |
10358 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
10359 | { | |
10360 | asection *input_section; | |
10361 | ||
10362 | if (p->type != bfd_indirect_link_order) | |
10363 | continue; | |
10364 | input_section = p->u.indirect.section; | |
10365 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
10366 | elf_link_input_bfd ignores this section. */ | |
10367 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
10368 | } | |
a0c8462f | 10369 | |
104d59d1 JM |
10370 | attr_size = bfd_elf_obj_attr_size (abfd); |
10371 | if (attr_size) | |
10372 | { | |
10373 | bfd_set_section_size (abfd, o, attr_size); | |
10374 | attr_section = o; | |
10375 | /* Skip this section later on. */ | |
10376 | o->map_head.link_order = NULL; | |
10377 | } | |
10378 | else | |
10379 | o->flags |= SEC_EXCLUDE; | |
10380 | } | |
10381 | } | |
10382 | ||
c152c796 AM |
10383 | /* Count up the number of relocations we will output for each output |
10384 | section, so that we know the sizes of the reloc sections. We | |
10385 | also figure out some maximum sizes. */ | |
10386 | max_contents_size = 0; | |
10387 | max_external_reloc_size = 0; | |
10388 | max_internal_reloc_count = 0; | |
10389 | max_sym_count = 0; | |
10390 | max_sym_shndx_count = 0; | |
10391 | merged = FALSE; | |
10392 | for (o = abfd->sections; o != NULL; o = o->next) | |
10393 | { | |
10394 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10395 | o->reloc_count = 0; | |
10396 | ||
8423293d | 10397 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
10398 | { |
10399 | unsigned int reloc_count = 0; | |
10400 | struct bfd_elf_section_data *esdi = NULL; | |
c152c796 AM |
10401 | |
10402 | if (p->type == bfd_section_reloc_link_order | |
10403 | || p->type == bfd_symbol_reloc_link_order) | |
10404 | reloc_count = 1; | |
10405 | else if (p->type == bfd_indirect_link_order) | |
10406 | { | |
10407 | asection *sec; | |
10408 | ||
10409 | sec = p->u.indirect.section; | |
10410 | esdi = elf_section_data (sec); | |
10411 | ||
10412 | /* Mark all sections which are to be included in the | |
10413 | link. This will normally be every section. We need | |
10414 | to do this so that we can identify any sections which | |
10415 | the linker has decided to not include. */ | |
10416 | sec->linker_mark = TRUE; | |
10417 | ||
10418 | if (sec->flags & SEC_MERGE) | |
10419 | merged = TRUE; | |
10420 | ||
10421 | if (info->relocatable || info->emitrelocations) | |
10422 | reloc_count = sec->reloc_count; | |
10423 | else if (bed->elf_backend_count_relocs) | |
58217f29 | 10424 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); |
c152c796 | 10425 | |
eea6121a AM |
10426 | if (sec->rawsize > max_contents_size) |
10427 | max_contents_size = sec->rawsize; | |
10428 | if (sec->size > max_contents_size) | |
10429 | max_contents_size = sec->size; | |
c152c796 AM |
10430 | |
10431 | /* We are interested in just local symbols, not all | |
10432 | symbols. */ | |
10433 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
10434 | && (sec->owner->flags & DYNAMIC) == 0) | |
10435 | { | |
10436 | size_t sym_count; | |
10437 | ||
10438 | if (elf_bad_symtab (sec->owner)) | |
10439 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
10440 | / bed->s->sizeof_sym); | |
10441 | else | |
10442 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
10443 | ||
10444 | if (sym_count > max_sym_count) | |
10445 | max_sym_count = sym_count; | |
10446 | ||
10447 | if (sym_count > max_sym_shndx_count | |
10448 | && elf_symtab_shndx (sec->owner) != 0) | |
10449 | max_sym_shndx_count = sym_count; | |
10450 | ||
10451 | if ((sec->flags & SEC_RELOC) != 0) | |
10452 | { | |
d4730f92 | 10453 | size_t ext_size = 0; |
c152c796 | 10454 | |
d4730f92 BS |
10455 | if (esdi->rel.hdr != NULL) |
10456 | ext_size = esdi->rel.hdr->sh_size; | |
10457 | if (esdi->rela.hdr != NULL) | |
10458 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 10459 | |
c152c796 AM |
10460 | if (ext_size > max_external_reloc_size) |
10461 | max_external_reloc_size = ext_size; | |
10462 | if (sec->reloc_count > max_internal_reloc_count) | |
10463 | max_internal_reloc_count = sec->reloc_count; | |
10464 | } | |
10465 | } | |
10466 | } | |
10467 | ||
10468 | if (reloc_count == 0) | |
10469 | continue; | |
10470 | ||
10471 | o->reloc_count += reloc_count; | |
10472 | ||
d4730f92 BS |
10473 | if (p->type == bfd_indirect_link_order |
10474 | && (info->relocatable || info->emitrelocations)) | |
c152c796 | 10475 | { |
d4730f92 BS |
10476 | if (esdi->rel.hdr) |
10477 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); | |
10478 | if (esdi->rela.hdr) | |
10479 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); | |
10480 | } | |
10481 | else | |
10482 | { | |
10483 | if (o->use_rela_p) | |
10484 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 10485 | else |
d4730f92 | 10486 | esdo->rel.count += reloc_count; |
c152c796 | 10487 | } |
c152c796 AM |
10488 | } |
10489 | ||
10490 | if (o->reloc_count > 0) | |
10491 | o->flags |= SEC_RELOC; | |
10492 | else | |
10493 | { | |
10494 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
10495 | set it (this is probably a bug) and if it is set | |
10496 | assign_section_numbers will create a reloc section. */ | |
10497 | o->flags &=~ SEC_RELOC; | |
10498 | } | |
10499 | ||
10500 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
10501 | zero. This is done in elf_fake_sections as well, but forcing | |
10502 | the VMA to 0 here will ensure that relocs against these | |
10503 | sections are handled correctly. */ | |
10504 | if ((o->flags & SEC_ALLOC) == 0 | |
10505 | && ! o->user_set_vma) | |
10506 | o->vma = 0; | |
10507 | } | |
10508 | ||
10509 | if (! info->relocatable && merged) | |
10510 | elf_link_hash_traverse (elf_hash_table (info), | |
10511 | _bfd_elf_link_sec_merge_syms, abfd); | |
10512 | ||
10513 | /* Figure out the file positions for everything but the symbol table | |
10514 | and the relocs. We set symcount to force assign_section_numbers | |
10515 | to create a symbol table. */ | |
10516 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
10517 | BFD_ASSERT (! abfd->output_has_begun); | |
10518 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
10519 | goto error_return; | |
10520 | ||
ee75fd95 | 10521 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
10522 | for (o = abfd->sections; o != NULL; o = o->next) |
10523 | { | |
d4730f92 | 10524 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
10525 | if ((o->flags & SEC_RELOC) != 0) |
10526 | { | |
d4730f92 BS |
10527 | if (esdo->rel.hdr |
10528 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) | |
c152c796 AM |
10529 | goto error_return; |
10530 | ||
d4730f92 BS |
10531 | if (esdo->rela.hdr |
10532 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) | |
c152c796 AM |
10533 | goto error_return; |
10534 | } | |
10535 | ||
10536 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
10537 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
10538 | esdo->rel.count = 0; |
10539 | esdo->rela.count = 0; | |
c152c796 AM |
10540 | } |
10541 | ||
10542 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
10543 | ||
10544 | /* We have now assigned file positions for all the sections except | |
10545 | .symtab and .strtab. We start the .symtab section at the current | |
10546 | file position, and write directly to it. We build the .strtab | |
10547 | section in memory. */ | |
10548 | bfd_get_symcount (abfd) = 0; | |
10549 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10550 | /* sh_name is set in prep_headers. */ | |
10551 | symtab_hdr->sh_type = SHT_SYMTAB; | |
10552 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
10553 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
10554 | /* sh_link is set in assign_section_numbers. */ | |
10555 | /* sh_info is set below. */ | |
10556 | /* sh_offset is set just below. */ | |
72de5009 | 10557 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 AM |
10558 | |
10559 | off = elf_tdata (abfd)->next_file_pos; | |
10560 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
10561 | ||
10562 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
10563 | incorrect. We do not yet know the size of the .symtab section. | |
10564 | We correct next_file_pos below, after we do know the size. */ | |
10565 | ||
10566 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
10567 | continuously seeking to the right position in the file. */ | |
10568 | if (! info->keep_memory || max_sym_count < 20) | |
10569 | finfo.symbuf_size = 20; | |
10570 | else | |
10571 | finfo.symbuf_size = max_sym_count; | |
10572 | amt = finfo.symbuf_size; | |
10573 | amt *= bed->s->sizeof_sym; | |
a50b1753 | 10574 | finfo.symbuf = (bfd_byte *) bfd_malloc (amt); |
c152c796 AM |
10575 | if (finfo.symbuf == NULL) |
10576 | goto error_return; | |
4fbb74a6 | 10577 | if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF)) |
c152c796 AM |
10578 | { |
10579 | /* Wild guess at number of output symbols. realloc'd as needed. */ | |
10580 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
10581 | finfo.shndxbuf_size = amt; | |
10582 | amt *= sizeof (Elf_External_Sym_Shndx); | |
a50b1753 | 10583 | finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
c152c796 AM |
10584 | if (finfo.symshndxbuf == NULL) |
10585 | goto error_return; | |
10586 | } | |
10587 | ||
10588 | /* Start writing out the symbol table. The first symbol is always a | |
10589 | dummy symbol. */ | |
10590 | if (info->strip != strip_all | |
10591 | || emit_relocs) | |
10592 | { | |
10593 | elfsym.st_value = 0; | |
10594 | elfsym.st_size = 0; | |
10595 | elfsym.st_info = 0; | |
10596 | elfsym.st_other = 0; | |
10597 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 10598 | elfsym.st_target_internal = 0; |
6e0b88f1 AM |
10599 | if (elf_link_output_sym (&finfo, NULL, &elfsym, bfd_und_section_ptr, |
10600 | NULL) != 1) | |
c152c796 AM |
10601 | goto error_return; |
10602 | } | |
10603 | ||
c152c796 AM |
10604 | /* Output a symbol for each section. We output these even if we are |
10605 | discarding local symbols, since they are used for relocs. These | |
10606 | symbols have no names. We store the index of each one in the | |
10607 | index field of the section, so that we can find it again when | |
10608 | outputting relocs. */ | |
10609 | if (info->strip != strip_all | |
10610 | || emit_relocs) | |
10611 | { | |
10612 | elfsym.st_size = 0; | |
10613 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
10614 | elfsym.st_other = 0; | |
f0b5bb34 | 10615 | elfsym.st_value = 0; |
35fc36a8 | 10616 | elfsym.st_target_internal = 0; |
c152c796 AM |
10617 | for (i = 1; i < elf_numsections (abfd); i++) |
10618 | { | |
10619 | o = bfd_section_from_elf_index (abfd, i); | |
10620 | if (o != NULL) | |
f0b5bb34 AM |
10621 | { |
10622 | o->target_index = bfd_get_symcount (abfd); | |
10623 | elfsym.st_shndx = i; | |
10624 | if (!info->relocatable) | |
10625 | elfsym.st_value = o->vma; | |
6e0b88f1 | 10626 | if (elf_link_output_sym (&finfo, NULL, &elfsym, o, NULL) != 1) |
f0b5bb34 AM |
10627 | goto error_return; |
10628 | } | |
c152c796 AM |
10629 | } |
10630 | } | |
10631 | ||
10632 | /* Allocate some memory to hold information read in from the input | |
10633 | files. */ | |
10634 | if (max_contents_size != 0) | |
10635 | { | |
a50b1753 | 10636 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
c152c796 AM |
10637 | if (finfo.contents == NULL) |
10638 | goto error_return; | |
10639 | } | |
10640 | ||
10641 | if (max_external_reloc_size != 0) | |
10642 | { | |
10643 | finfo.external_relocs = bfd_malloc (max_external_reloc_size); | |
10644 | if (finfo.external_relocs == NULL) | |
10645 | goto error_return; | |
10646 | } | |
10647 | ||
10648 | if (max_internal_reloc_count != 0) | |
10649 | { | |
10650 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
10651 | amt *= sizeof (Elf_Internal_Rela); | |
a50b1753 | 10652 | finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
c152c796 AM |
10653 | if (finfo.internal_relocs == NULL) |
10654 | goto error_return; | |
10655 | } | |
10656 | ||
10657 | if (max_sym_count != 0) | |
10658 | { | |
10659 | amt = max_sym_count * bed->s->sizeof_sym; | |
a50b1753 | 10660 | finfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
c152c796 AM |
10661 | if (finfo.external_syms == NULL) |
10662 | goto error_return; | |
10663 | ||
10664 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
a50b1753 | 10665 | finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
c152c796 AM |
10666 | if (finfo.internal_syms == NULL) |
10667 | goto error_return; | |
10668 | ||
10669 | amt = max_sym_count * sizeof (long); | |
a50b1753 | 10670 | finfo.indices = (long int *) bfd_malloc (amt); |
c152c796 AM |
10671 | if (finfo.indices == NULL) |
10672 | goto error_return; | |
10673 | ||
10674 | amt = max_sym_count * sizeof (asection *); | |
a50b1753 | 10675 | finfo.sections = (asection **) bfd_malloc (amt); |
c152c796 AM |
10676 | if (finfo.sections == NULL) |
10677 | goto error_return; | |
10678 | } | |
10679 | ||
10680 | if (max_sym_shndx_count != 0) | |
10681 | { | |
10682 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
a50b1753 | 10683 | finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
c152c796 AM |
10684 | if (finfo.locsym_shndx == NULL) |
10685 | goto error_return; | |
10686 | } | |
10687 | ||
10688 | if (elf_hash_table (info)->tls_sec) | |
10689 | { | |
10690 | bfd_vma base, end = 0; | |
10691 | asection *sec; | |
10692 | ||
10693 | for (sec = elf_hash_table (info)->tls_sec; | |
10694 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
10695 | sec = sec->next) | |
10696 | { | |
3a800eb9 | 10697 | bfd_size_type size = sec->size; |
c152c796 | 10698 | |
3a800eb9 AM |
10699 | if (size == 0 |
10700 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 10701 | { |
91d6fa6a NC |
10702 | struct bfd_link_order *ord = sec->map_tail.link_order; |
10703 | ||
10704 | if (ord != NULL) | |
10705 | size = ord->offset + ord->size; | |
c152c796 AM |
10706 | } |
10707 | end = sec->vma + size; | |
10708 | } | |
10709 | base = elf_hash_table (info)->tls_sec->vma; | |
7dc98aea RO |
10710 | /* Only align end of TLS section if static TLS doesn't have special |
10711 | alignment requirements. */ | |
10712 | if (bed->static_tls_alignment == 1) | |
10713 | end = align_power (end, | |
10714 | elf_hash_table (info)->tls_sec->alignment_power); | |
c152c796 AM |
10715 | elf_hash_table (info)->tls_size = end - base; |
10716 | } | |
10717 | ||
0b52efa6 PB |
10718 | /* Reorder SHF_LINK_ORDER sections. */ |
10719 | for (o = abfd->sections; o != NULL; o = o->next) | |
10720 | { | |
10721 | if (!elf_fixup_link_order (abfd, o)) | |
10722 | return FALSE; | |
10723 | } | |
10724 | ||
c152c796 AM |
10725 | /* Since ELF permits relocations to be against local symbols, we |
10726 | must have the local symbols available when we do the relocations. | |
10727 | Since we would rather only read the local symbols once, and we | |
10728 | would rather not keep them in memory, we handle all the | |
10729 | relocations for a single input file at the same time. | |
10730 | ||
10731 | Unfortunately, there is no way to know the total number of local | |
10732 | symbols until we have seen all of them, and the local symbol | |
10733 | indices precede the global symbol indices. This means that when | |
10734 | we are generating relocatable output, and we see a reloc against | |
10735 | a global symbol, we can not know the symbol index until we have | |
10736 | finished examining all the local symbols to see which ones we are | |
10737 | going to output. To deal with this, we keep the relocations in | |
10738 | memory, and don't output them until the end of the link. This is | |
10739 | an unfortunate waste of memory, but I don't see a good way around | |
10740 | it. Fortunately, it only happens when performing a relocatable | |
10741 | link, which is not the common case. FIXME: If keep_memory is set | |
10742 | we could write the relocs out and then read them again; I don't | |
10743 | know how bad the memory loss will be. */ | |
10744 | ||
10745 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
10746 | sub->output_has_begun = FALSE; | |
10747 | for (o = abfd->sections; o != NULL; o = o->next) | |
10748 | { | |
8423293d | 10749 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
10750 | { |
10751 | if (p->type == bfd_indirect_link_order | |
10752 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
10753 | == bfd_target_elf_flavour) | |
10754 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
10755 | { | |
10756 | if (! sub->output_has_begun) | |
10757 | { | |
10758 | if (! elf_link_input_bfd (&finfo, sub)) | |
10759 | goto error_return; | |
10760 | sub->output_has_begun = TRUE; | |
10761 | } | |
10762 | } | |
10763 | else if (p->type == bfd_section_reloc_link_order | |
10764 | || p->type == bfd_symbol_reloc_link_order) | |
10765 | { | |
10766 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
10767 | goto error_return; | |
10768 | } | |
10769 | else | |
10770 | { | |
10771 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
10772 | { |
10773 | if (p->type == bfd_indirect_link_order | |
10774 | && (bfd_get_flavour (sub) | |
10775 | == bfd_target_elf_flavour) | |
10776 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
10777 | != bed->s->elfclass)) | |
10778 | { | |
10779 | const char *iclass, *oclass; | |
10780 | ||
10781 | if (bed->s->elfclass == ELFCLASS64) | |
10782 | { | |
10783 | iclass = "ELFCLASS32"; | |
10784 | oclass = "ELFCLASS64"; | |
10785 | } | |
10786 | else | |
10787 | { | |
10788 | iclass = "ELFCLASS64"; | |
10789 | oclass = "ELFCLASS32"; | |
10790 | } | |
10791 | ||
10792 | bfd_set_error (bfd_error_wrong_format); | |
10793 | (*_bfd_error_handler) | |
10794 | (_("%B: file class %s incompatible with %s"), | |
10795 | sub, iclass, oclass); | |
10796 | } | |
10797 | ||
10798 | goto error_return; | |
10799 | } | |
c152c796 AM |
10800 | } |
10801 | } | |
10802 | } | |
10803 | ||
c0f00686 L |
10804 | /* Free symbol buffer if needed. */ |
10805 | if (!info->reduce_memory_overheads) | |
10806 | { | |
10807 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3fcd97f1 JJ |
10808 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
10809 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
10810 | { |
10811 | free (elf_tdata (sub)->symbuf); | |
10812 | elf_tdata (sub)->symbuf = NULL; | |
10813 | } | |
10814 | } | |
10815 | ||
c152c796 AM |
10816 | /* Output any global symbols that got converted to local in a |
10817 | version script or due to symbol visibility. We do this in a | |
10818 | separate step since ELF requires all local symbols to appear | |
10819 | prior to any global symbols. FIXME: We should only do this if | |
10820 | some global symbols were, in fact, converted to become local. | |
10821 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
10822 | eoinfo.failed = FALSE; | |
10823 | eoinfo.finfo = &finfo; | |
10824 | eoinfo.localsyms = TRUE; | |
10825 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
10826 | &eoinfo); | |
10827 | if (eoinfo.failed) | |
10828 | return FALSE; | |
10829 | ||
4e617b1e PB |
10830 | /* If backend needs to output some local symbols not present in the hash |
10831 | table, do it now. */ | |
10832 | if (bed->elf_backend_output_arch_local_syms) | |
10833 | { | |
6e0b88f1 | 10834 | typedef int (*out_sym_func) |
4e617b1e PB |
10835 | (void *, const char *, Elf_Internal_Sym *, asection *, |
10836 | struct elf_link_hash_entry *); | |
10837 | ||
10838 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
10839 | (abfd, info, &finfo, (out_sym_func) elf_link_output_sym))) | |
10840 | return FALSE; | |
10841 | } | |
10842 | ||
c152c796 AM |
10843 | /* That wrote out all the local symbols. Finish up the symbol table |
10844 | with the global symbols. Even if we want to strip everything we | |
10845 | can, we still need to deal with those global symbols that got | |
10846 | converted to local in a version script. */ | |
10847 | ||
10848 | /* The sh_info field records the index of the first non local symbol. */ | |
10849 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
10850 | ||
10851 | if (dynamic | |
10852 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
10853 | { | |
10854 | Elf_Internal_Sym sym; | |
10855 | bfd_byte *dynsym = finfo.dynsym_sec->contents; | |
10856 | long last_local = 0; | |
10857 | ||
10858 | /* Write out the section symbols for the output sections. */ | |
67687978 | 10859 | if (info->shared || elf_hash_table (info)->is_relocatable_executable) |
c152c796 AM |
10860 | { |
10861 | asection *s; | |
10862 | ||
10863 | sym.st_size = 0; | |
10864 | sym.st_name = 0; | |
10865 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
10866 | sym.st_other = 0; | |
35fc36a8 | 10867 | sym.st_target_internal = 0; |
c152c796 AM |
10868 | |
10869 | for (s = abfd->sections; s != NULL; s = s->next) | |
10870 | { | |
10871 | int indx; | |
10872 | bfd_byte *dest; | |
10873 | long dynindx; | |
10874 | ||
c152c796 | 10875 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
10876 | if (dynindx <= 0) |
10877 | continue; | |
10878 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
10879 | BFD_ASSERT (indx > 0); |
10880 | sym.st_shndx = indx; | |
c0d5a53d L |
10881 | if (! check_dynsym (abfd, &sym)) |
10882 | return FALSE; | |
c152c796 AM |
10883 | sym.st_value = s->vma; |
10884 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
8c37241b JJ |
10885 | if (last_local < dynindx) |
10886 | last_local = dynindx; | |
c152c796 AM |
10887 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
10888 | } | |
c152c796 AM |
10889 | } |
10890 | ||
10891 | /* Write out the local dynsyms. */ | |
10892 | if (elf_hash_table (info)->dynlocal) | |
10893 | { | |
10894 | struct elf_link_local_dynamic_entry *e; | |
10895 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
10896 | { | |
10897 | asection *s; | |
10898 | bfd_byte *dest; | |
10899 | ||
935bd1e0 | 10900 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
10901 | Note that we saved a word of storage and overwrote |
10902 | the original st_name with the dynstr_index. */ | |
10903 | sym = e->isym; | |
935bd1e0 | 10904 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 10905 | |
cb33740c AM |
10906 | s = bfd_section_from_elf_index (e->input_bfd, |
10907 | e->isym.st_shndx); | |
10908 | if (s != NULL) | |
c152c796 | 10909 | { |
c152c796 AM |
10910 | sym.st_shndx = |
10911 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
10912 | if (! check_dynsym (abfd, &sym)) |
10913 | return FALSE; | |
c152c796 AM |
10914 | sym.st_value = (s->output_section->vma |
10915 | + s->output_offset | |
10916 | + e->isym.st_value); | |
10917 | } | |
10918 | ||
10919 | if (last_local < e->dynindx) | |
10920 | last_local = e->dynindx; | |
10921 | ||
10922 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; | |
10923 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
10924 | } | |
10925 | } | |
10926 | ||
10927 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = | |
10928 | last_local + 1; | |
10929 | } | |
10930 | ||
10931 | /* We get the global symbols from the hash table. */ | |
10932 | eoinfo.failed = FALSE; | |
10933 | eoinfo.localsyms = FALSE; | |
10934 | eoinfo.finfo = &finfo; | |
10935 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
10936 | &eoinfo); | |
10937 | if (eoinfo.failed) | |
10938 | return FALSE; | |
10939 | ||
10940 | /* If backend needs to output some symbols not present in the hash | |
10941 | table, do it now. */ | |
10942 | if (bed->elf_backend_output_arch_syms) | |
10943 | { | |
6e0b88f1 | 10944 | typedef int (*out_sym_func) |
c152c796 AM |
10945 | (void *, const char *, Elf_Internal_Sym *, asection *, |
10946 | struct elf_link_hash_entry *); | |
10947 | ||
10948 | if (! ((*bed->elf_backend_output_arch_syms) | |
10949 | (abfd, info, &finfo, (out_sym_func) elf_link_output_sym))) | |
10950 | return FALSE; | |
10951 | } | |
10952 | ||
10953 | /* Flush all symbols to the file. */ | |
10954 | if (! elf_link_flush_output_syms (&finfo, bed)) | |
10955 | return FALSE; | |
10956 | ||
10957 | /* Now we know the size of the symtab section. */ | |
10958 | off += symtab_hdr->sh_size; | |
10959 | ||
10960 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; | |
10961 | if (symtab_shndx_hdr->sh_name != 0) | |
10962 | { | |
10963 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
10964 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
10965 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
10966 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
10967 | symtab_shndx_hdr->sh_size = amt; | |
10968 | ||
10969 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
10970 | off, TRUE); | |
10971 | ||
10972 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
10973 | || (bfd_bwrite (finfo.symshndxbuf, amt, abfd) != amt)) | |
10974 | return FALSE; | |
10975 | } | |
10976 | ||
10977 | ||
10978 | /* Finish up and write out the symbol string table (.strtab) | |
10979 | section. */ | |
10980 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
10981 | /* sh_name was set in prep_headers. */ | |
10982 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
10983 | symstrtab_hdr->sh_flags = 0; | |
10984 | symstrtab_hdr->sh_addr = 0; | |
10985 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
10986 | symstrtab_hdr->sh_entsize = 0; | |
10987 | symstrtab_hdr->sh_link = 0; | |
10988 | symstrtab_hdr->sh_info = 0; | |
10989 | /* sh_offset is set just below. */ | |
10990 | symstrtab_hdr->sh_addralign = 1; | |
10991 | ||
10992 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); | |
10993 | elf_tdata (abfd)->next_file_pos = off; | |
10994 | ||
10995 | if (bfd_get_symcount (abfd) > 0) | |
10996 | { | |
10997 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
10998 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
10999 | return FALSE; | |
11000 | } | |
11001 | ||
11002 | /* Adjust the relocs to have the correct symbol indices. */ | |
11003 | for (o = abfd->sections; o != NULL; o = o->next) | |
11004 | { | |
d4730f92 | 11005 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11006 | if ((o->flags & SEC_RELOC) == 0) |
11007 | continue; | |
11008 | ||
d4730f92 BS |
11009 | if (esdo->rel.hdr != NULL) |
11010 | elf_link_adjust_relocs (abfd, &esdo->rel); | |
11011 | if (esdo->rela.hdr != NULL) | |
11012 | elf_link_adjust_relocs (abfd, &esdo->rela); | |
c152c796 AM |
11013 | |
11014 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
11015 | trying to swap the relocs out itself. */ | |
11016 | o->reloc_count = 0; | |
11017 | } | |
11018 | ||
11019 | if (dynamic && info->combreloc && dynobj != NULL) | |
11020 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
11021 | ||
11022 | /* If we are linking against a dynamic object, or generating a | |
11023 | shared library, finish up the dynamic linking information. */ | |
11024 | if (dynamic) | |
11025 | { | |
11026 | bfd_byte *dyncon, *dynconend; | |
11027 | ||
11028 | /* Fix up .dynamic entries. */ | |
11029 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
11030 | BFD_ASSERT (o != NULL); | |
11031 | ||
11032 | dyncon = o->contents; | |
eea6121a | 11033 | dynconend = o->contents + o->size; |
c152c796 AM |
11034 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
11035 | { | |
11036 | Elf_Internal_Dyn dyn; | |
11037 | const char *name; | |
11038 | unsigned int type; | |
11039 | ||
11040 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11041 | ||
11042 | switch (dyn.d_tag) | |
11043 | { | |
11044 | default: | |
11045 | continue; | |
11046 | case DT_NULL: | |
11047 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
11048 | { | |
11049 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
11050 | { | |
11051 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
11052 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
11053 | default: continue; | |
11054 | } | |
11055 | dyn.d_un.d_val = relativecount; | |
11056 | relativecount = 0; | |
11057 | break; | |
11058 | } | |
11059 | continue; | |
11060 | ||
11061 | case DT_INIT: | |
11062 | name = info->init_function; | |
11063 | goto get_sym; | |
11064 | case DT_FINI: | |
11065 | name = info->fini_function; | |
11066 | get_sym: | |
11067 | { | |
11068 | struct elf_link_hash_entry *h; | |
11069 | ||
11070 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
11071 | FALSE, FALSE, TRUE); | |
11072 | if (h != NULL | |
11073 | && (h->root.type == bfd_link_hash_defined | |
11074 | || h->root.type == bfd_link_hash_defweak)) | |
11075 | { | |
bef26483 | 11076 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
11077 | o = h->root.u.def.section; |
11078 | if (o->output_section != NULL) | |
bef26483 | 11079 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
11080 | + o->output_offset); |
11081 | else | |
11082 | { | |
11083 | /* The symbol is imported from another shared | |
11084 | library and does not apply to this one. */ | |
bef26483 | 11085 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11086 | } |
11087 | break; | |
11088 | } | |
11089 | } | |
11090 | continue; | |
11091 | ||
11092 | case DT_PREINIT_ARRAYSZ: | |
11093 | name = ".preinit_array"; | |
11094 | goto get_size; | |
11095 | case DT_INIT_ARRAYSZ: | |
11096 | name = ".init_array"; | |
11097 | goto get_size; | |
11098 | case DT_FINI_ARRAYSZ: | |
11099 | name = ".fini_array"; | |
11100 | get_size: | |
11101 | o = bfd_get_section_by_name (abfd, name); | |
11102 | if (o == NULL) | |
11103 | { | |
11104 | (*_bfd_error_handler) | |
d003868e | 11105 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11106 | goto error_return; |
11107 | } | |
eea6121a | 11108 | if (o->size == 0) |
c152c796 AM |
11109 | (*_bfd_error_handler) |
11110 | (_("warning: %s section has zero size"), name); | |
eea6121a | 11111 | dyn.d_un.d_val = o->size; |
c152c796 AM |
11112 | break; |
11113 | ||
11114 | case DT_PREINIT_ARRAY: | |
11115 | name = ".preinit_array"; | |
11116 | goto get_vma; | |
11117 | case DT_INIT_ARRAY: | |
11118 | name = ".init_array"; | |
11119 | goto get_vma; | |
11120 | case DT_FINI_ARRAY: | |
11121 | name = ".fini_array"; | |
11122 | goto get_vma; | |
11123 | ||
11124 | case DT_HASH: | |
11125 | name = ".hash"; | |
11126 | goto get_vma; | |
fdc90cb4 JJ |
11127 | case DT_GNU_HASH: |
11128 | name = ".gnu.hash"; | |
11129 | goto get_vma; | |
c152c796 AM |
11130 | case DT_STRTAB: |
11131 | name = ".dynstr"; | |
11132 | goto get_vma; | |
11133 | case DT_SYMTAB: | |
11134 | name = ".dynsym"; | |
11135 | goto get_vma; | |
11136 | case DT_VERDEF: | |
11137 | name = ".gnu.version_d"; | |
11138 | goto get_vma; | |
11139 | case DT_VERNEED: | |
11140 | name = ".gnu.version_r"; | |
11141 | goto get_vma; | |
11142 | case DT_VERSYM: | |
11143 | name = ".gnu.version"; | |
11144 | get_vma: | |
11145 | o = bfd_get_section_by_name (abfd, name); | |
11146 | if (o == NULL) | |
11147 | { | |
11148 | (*_bfd_error_handler) | |
d003868e | 11149 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11150 | goto error_return; |
11151 | } | |
894891db NC |
11152 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
11153 | { | |
11154 | (*_bfd_error_handler) | |
11155 | (_("warning: section '%s' is being made into a note"), name); | |
11156 | bfd_set_error (bfd_error_nonrepresentable_section); | |
11157 | goto error_return; | |
11158 | } | |
c152c796 AM |
11159 | dyn.d_un.d_ptr = o->vma; |
11160 | break; | |
11161 | ||
11162 | case DT_REL: | |
11163 | case DT_RELA: | |
11164 | case DT_RELSZ: | |
11165 | case DT_RELASZ: | |
11166 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
11167 | type = SHT_REL; | |
11168 | else | |
11169 | type = SHT_RELA; | |
11170 | dyn.d_un.d_val = 0; | |
bef26483 | 11171 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11172 | for (i = 1; i < elf_numsections (abfd); i++) |
11173 | { | |
11174 | Elf_Internal_Shdr *hdr; | |
11175 | ||
11176 | hdr = elf_elfsections (abfd)[i]; | |
11177 | if (hdr->sh_type == type | |
11178 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
11179 | { | |
11180 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
11181 | dyn.d_un.d_val += hdr->sh_size; | |
11182 | else | |
11183 | { | |
bef26483 AM |
11184 | if (dyn.d_un.d_ptr == 0 |
11185 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
11186 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
11187 | } |
11188 | } | |
11189 | } | |
11190 | break; | |
11191 | } | |
11192 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
11193 | } | |
11194 | } | |
11195 | ||
11196 | /* If we have created any dynamic sections, then output them. */ | |
11197 | if (dynobj != NULL) | |
11198 | { | |
11199 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
11200 | goto error_return; | |
11201 | ||
943284cc DJ |
11202 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
11203 | if (info->warn_shared_textrel && info->shared) | |
11204 | { | |
11205 | bfd_byte *dyncon, *dynconend; | |
11206 | ||
11207 | /* Fix up .dynamic entries. */ | |
11208 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
11209 | BFD_ASSERT (o != NULL); | |
11210 | ||
11211 | dyncon = o->contents; | |
11212 | dynconend = o->contents + o->size; | |
11213 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
11214 | { | |
11215 | Elf_Internal_Dyn dyn; | |
11216 | ||
11217 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11218 | ||
11219 | if (dyn.d_tag == DT_TEXTREL) | |
11220 | { | |
a0c8462f | 11221 | info->callbacks->einfo |
9267588c | 11222 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); |
943284cc DJ |
11223 | break; |
11224 | } | |
11225 | } | |
11226 | } | |
11227 | ||
c152c796 AM |
11228 | for (o = dynobj->sections; o != NULL; o = o->next) |
11229 | { | |
11230 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 11231 | || o->size == 0 |
c152c796 AM |
11232 | || o->output_section == bfd_abs_section_ptr) |
11233 | continue; | |
11234 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
11235 | { | |
11236 | /* At this point, we are only interested in sections | |
11237 | created by _bfd_elf_link_create_dynamic_sections. */ | |
11238 | continue; | |
11239 | } | |
3722b82f AM |
11240 | if (elf_hash_table (info)->stab_info.stabstr == o) |
11241 | continue; | |
eea6121a AM |
11242 | if (elf_hash_table (info)->eh_info.hdr_sec == o) |
11243 | continue; | |
c152c796 AM |
11244 | if ((elf_section_data (o->output_section)->this_hdr.sh_type |
11245 | != SHT_STRTAB) | |
894891db | 11246 | && (strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)) |
c152c796 | 11247 | { |
5dabe785 | 11248 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
11249 | if (! bfd_set_section_contents (abfd, o->output_section, |
11250 | o->contents, | |
11251 | (file_ptr) o->output_offset, | |
eea6121a | 11252 | o->size)) |
c152c796 AM |
11253 | goto error_return; |
11254 | } | |
11255 | else | |
11256 | { | |
11257 | /* The contents of the .dynstr section are actually in a | |
11258 | stringtab. */ | |
11259 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; | |
11260 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
11261 | || ! _bfd_elf_strtab_emit (abfd, | |
11262 | elf_hash_table (info)->dynstr)) | |
11263 | goto error_return; | |
11264 | } | |
11265 | } | |
11266 | } | |
11267 | ||
11268 | if (info->relocatable) | |
11269 | { | |
11270 | bfd_boolean failed = FALSE; | |
11271 | ||
11272 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
11273 | if (failed) | |
11274 | goto error_return; | |
11275 | } | |
11276 | ||
11277 | /* If we have optimized stabs strings, output them. */ | |
3722b82f | 11278 | if (elf_hash_table (info)->stab_info.stabstr != NULL) |
c152c796 AM |
11279 | { |
11280 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
11281 | goto error_return; | |
11282 | } | |
11283 | ||
11284 | if (info->eh_frame_hdr) | |
11285 | { | |
11286 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) | |
11287 | goto error_return; | |
11288 | } | |
11289 | ||
11290 | if (finfo.symstrtab != NULL) | |
11291 | _bfd_stringtab_free (finfo.symstrtab); | |
11292 | if (finfo.contents != NULL) | |
11293 | free (finfo.contents); | |
11294 | if (finfo.external_relocs != NULL) | |
11295 | free (finfo.external_relocs); | |
11296 | if (finfo.internal_relocs != NULL) | |
11297 | free (finfo.internal_relocs); | |
11298 | if (finfo.external_syms != NULL) | |
11299 | free (finfo.external_syms); | |
11300 | if (finfo.locsym_shndx != NULL) | |
11301 | free (finfo.locsym_shndx); | |
11302 | if (finfo.internal_syms != NULL) | |
11303 | free (finfo.internal_syms); | |
11304 | if (finfo.indices != NULL) | |
11305 | free (finfo.indices); | |
11306 | if (finfo.sections != NULL) | |
11307 | free (finfo.sections); | |
11308 | if (finfo.symbuf != NULL) | |
11309 | free (finfo.symbuf); | |
11310 | if (finfo.symshndxbuf != NULL) | |
11311 | free (finfo.symshndxbuf); | |
11312 | for (o = abfd->sections; o != NULL; o = o->next) | |
11313 | { | |
d4730f92 BS |
11314 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
11315 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
11316 | free (esdo->rel.hashes); | |
11317 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
11318 | free (esdo->rela.hashes); | |
c152c796 AM |
11319 | } |
11320 | ||
11321 | elf_tdata (abfd)->linker = TRUE; | |
11322 | ||
104d59d1 JM |
11323 | if (attr_section) |
11324 | { | |
a50b1753 | 11325 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 11326 | if (contents == NULL) |
d0f16d5e | 11327 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
11328 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
11329 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
11330 | free (contents); | |
11331 | } | |
11332 | ||
c152c796 AM |
11333 | return TRUE; |
11334 | ||
11335 | error_return: | |
11336 | if (finfo.symstrtab != NULL) | |
11337 | _bfd_stringtab_free (finfo.symstrtab); | |
11338 | if (finfo.contents != NULL) | |
11339 | free (finfo.contents); | |
11340 | if (finfo.external_relocs != NULL) | |
11341 | free (finfo.external_relocs); | |
11342 | if (finfo.internal_relocs != NULL) | |
11343 | free (finfo.internal_relocs); | |
11344 | if (finfo.external_syms != NULL) | |
11345 | free (finfo.external_syms); | |
11346 | if (finfo.locsym_shndx != NULL) | |
11347 | free (finfo.locsym_shndx); | |
11348 | if (finfo.internal_syms != NULL) | |
11349 | free (finfo.internal_syms); | |
11350 | if (finfo.indices != NULL) | |
11351 | free (finfo.indices); | |
11352 | if (finfo.sections != NULL) | |
11353 | free (finfo.sections); | |
11354 | if (finfo.symbuf != NULL) | |
11355 | free (finfo.symbuf); | |
11356 | if (finfo.symshndxbuf != NULL) | |
11357 | free (finfo.symshndxbuf); | |
11358 | for (o = abfd->sections; o != NULL; o = o->next) | |
11359 | { | |
d4730f92 BS |
11360 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
11361 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
11362 | free (esdo->rel.hashes); | |
11363 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
11364 | free (esdo->rela.hashes); | |
c152c796 AM |
11365 | } |
11366 | ||
11367 | return FALSE; | |
11368 | } | |
11369 | \f | |
5241d853 RS |
11370 | /* Initialize COOKIE for input bfd ABFD. */ |
11371 | ||
11372 | static bfd_boolean | |
11373 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
11374 | struct bfd_link_info *info, bfd *abfd) | |
11375 | { | |
11376 | Elf_Internal_Shdr *symtab_hdr; | |
11377 | const struct elf_backend_data *bed; | |
11378 | ||
11379 | bed = get_elf_backend_data (abfd); | |
11380 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11381 | ||
11382 | cookie->abfd = abfd; | |
11383 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
11384 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
11385 | if (cookie->bad_symtab) | |
11386 | { | |
11387 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
11388 | cookie->extsymoff = 0; | |
11389 | } | |
11390 | else | |
11391 | { | |
11392 | cookie->locsymcount = symtab_hdr->sh_info; | |
11393 | cookie->extsymoff = symtab_hdr->sh_info; | |
11394 | } | |
11395 | ||
11396 | if (bed->s->arch_size == 32) | |
11397 | cookie->r_sym_shift = 8; | |
11398 | else | |
11399 | cookie->r_sym_shift = 32; | |
11400 | ||
11401 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
11402 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
11403 | { | |
11404 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
11405 | cookie->locsymcount, 0, | |
11406 | NULL, NULL, NULL); | |
11407 | if (cookie->locsyms == NULL) | |
11408 | { | |
11409 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
11410 | return FALSE; | |
11411 | } | |
11412 | if (info->keep_memory) | |
11413 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
11414 | } | |
11415 | return TRUE; | |
11416 | } | |
11417 | ||
11418 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
11419 | ||
11420 | static void | |
11421 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
11422 | { | |
11423 | Elf_Internal_Shdr *symtab_hdr; | |
11424 | ||
11425 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11426 | if (cookie->locsyms != NULL | |
11427 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
11428 | free (cookie->locsyms); | |
11429 | } | |
11430 | ||
11431 | /* Initialize the relocation information in COOKIE for input section SEC | |
11432 | of input bfd ABFD. */ | |
11433 | ||
11434 | static bfd_boolean | |
11435 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
11436 | struct bfd_link_info *info, bfd *abfd, | |
11437 | asection *sec) | |
11438 | { | |
11439 | const struct elf_backend_data *bed; | |
11440 | ||
11441 | if (sec->reloc_count == 0) | |
11442 | { | |
11443 | cookie->rels = NULL; | |
11444 | cookie->relend = NULL; | |
11445 | } | |
11446 | else | |
11447 | { | |
11448 | bed = get_elf_backend_data (abfd); | |
11449 | ||
11450 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
11451 | info->keep_memory); | |
11452 | if (cookie->rels == NULL) | |
11453 | return FALSE; | |
11454 | cookie->rel = cookie->rels; | |
11455 | cookie->relend = (cookie->rels | |
11456 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
11457 | } | |
11458 | cookie->rel = cookie->rels; | |
11459 | return TRUE; | |
11460 | } | |
11461 | ||
11462 | /* Free the memory allocated by init_reloc_cookie_rels, | |
11463 | if appropriate. */ | |
11464 | ||
11465 | static void | |
11466 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
11467 | asection *sec) | |
11468 | { | |
11469 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
11470 | free (cookie->rels); | |
11471 | } | |
11472 | ||
11473 | /* Initialize the whole of COOKIE for input section SEC. */ | |
11474 | ||
11475 | static bfd_boolean | |
11476 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
11477 | struct bfd_link_info *info, | |
11478 | asection *sec) | |
11479 | { | |
11480 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
11481 | goto error1; | |
11482 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
11483 | goto error2; | |
11484 | return TRUE; | |
11485 | ||
11486 | error2: | |
11487 | fini_reloc_cookie (cookie, sec->owner); | |
11488 | error1: | |
11489 | return FALSE; | |
11490 | } | |
11491 | ||
11492 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
11493 | if appropriate. */ | |
11494 | ||
11495 | static void | |
11496 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
11497 | asection *sec) | |
11498 | { | |
11499 | fini_reloc_cookie_rels (cookie, sec); | |
11500 | fini_reloc_cookie (cookie, sec->owner); | |
11501 | } | |
11502 | \f | |
c152c796 AM |
11503 | /* Garbage collect unused sections. */ |
11504 | ||
07adf181 AM |
11505 | /* Default gc_mark_hook. */ |
11506 | ||
11507 | asection * | |
11508 | _bfd_elf_gc_mark_hook (asection *sec, | |
11509 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
11510 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
11511 | struct elf_link_hash_entry *h, | |
11512 | Elf_Internal_Sym *sym) | |
11513 | { | |
bde6f3eb L |
11514 | const char *sec_name; |
11515 | ||
07adf181 AM |
11516 | if (h != NULL) |
11517 | { | |
11518 | switch (h->root.type) | |
11519 | { | |
11520 | case bfd_link_hash_defined: | |
11521 | case bfd_link_hash_defweak: | |
11522 | return h->root.u.def.section; | |
11523 | ||
11524 | case bfd_link_hash_common: | |
11525 | return h->root.u.c.p->section; | |
11526 | ||
bde6f3eb L |
11527 | case bfd_link_hash_undefined: |
11528 | case bfd_link_hash_undefweak: | |
11529 | /* To work around a glibc bug, keep all XXX input sections | |
11530 | when there is an as yet undefined reference to __start_XXX | |
11531 | or __stop_XXX symbols. The linker will later define such | |
11532 | symbols for orphan input sections that have a name | |
11533 | representable as a C identifier. */ | |
11534 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
11535 | sec_name = h->root.root.string + 8; | |
11536 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
11537 | sec_name = h->root.root.string + 7; | |
11538 | else | |
11539 | sec_name = NULL; | |
11540 | ||
11541 | if (sec_name && *sec_name != '\0') | |
11542 | { | |
11543 | bfd *i; | |
11544 | ||
11545 | for (i = info->input_bfds; i; i = i->link_next) | |
11546 | { | |
11547 | sec = bfd_get_section_by_name (i, sec_name); | |
11548 | if (sec) | |
11549 | sec->flags |= SEC_KEEP; | |
11550 | } | |
11551 | } | |
11552 | break; | |
11553 | ||
07adf181 AM |
11554 | default: |
11555 | break; | |
11556 | } | |
11557 | } | |
11558 | else | |
11559 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
11560 | ||
11561 | return NULL; | |
11562 | } | |
11563 | ||
5241d853 RS |
11564 | /* COOKIE->rel describes a relocation against section SEC, which is |
11565 | a section we've decided to keep. Return the section that contains | |
11566 | the relocation symbol, or NULL if no section contains it. */ | |
11567 | ||
11568 | asection * | |
11569 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
11570 | elf_gc_mark_hook_fn gc_mark_hook, | |
11571 | struct elf_reloc_cookie *cookie) | |
11572 | { | |
11573 | unsigned long r_symndx; | |
11574 | struct elf_link_hash_entry *h; | |
11575 | ||
11576 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 11577 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
11578 | return NULL; |
11579 | ||
11580 | if (r_symndx >= cookie->locsymcount | |
11581 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
11582 | { | |
11583 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
11584 | while (h->root.type == bfd_link_hash_indirect | |
11585 | || h->root.type == bfd_link_hash_warning) | |
11586 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11587 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); | |
11588 | } | |
11589 | ||
11590 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
11591 | &cookie->locsyms[r_symndx]); | |
11592 | } | |
11593 | ||
11594 | /* COOKIE->rel describes a relocation against section SEC, which is | |
11595 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 11596 | the relocation symbol. */ |
5241d853 RS |
11597 | |
11598 | bfd_boolean | |
11599 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
11600 | asection *sec, | |
11601 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 11602 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
11603 | { |
11604 | asection *rsec; | |
11605 | ||
11606 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie); | |
11607 | if (rsec && !rsec->gc_mark) | |
11608 | { | |
11609 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
11610 | rsec->gc_mark = 1; | |
5241d853 RS |
11611 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) |
11612 | return FALSE; | |
11613 | } | |
11614 | return TRUE; | |
11615 | } | |
11616 | ||
07adf181 AM |
11617 | /* The mark phase of garbage collection. For a given section, mark |
11618 | it and any sections in this section's group, and all the sections | |
11619 | which define symbols to which it refers. */ | |
11620 | ||
ccfa59ea AM |
11621 | bfd_boolean |
11622 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
11623 | asection *sec, | |
6a5bb875 | 11624 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
11625 | { |
11626 | bfd_boolean ret; | |
9d0a14d3 | 11627 | asection *group_sec, *eh_frame; |
c152c796 AM |
11628 | |
11629 | sec->gc_mark = 1; | |
11630 | ||
11631 | /* Mark all the sections in the group. */ | |
11632 | group_sec = elf_section_data (sec)->next_in_group; | |
11633 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 11634 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
11635 | return FALSE; |
11636 | ||
11637 | /* Look through the section relocs. */ | |
11638 | ret = TRUE; | |
9d0a14d3 RS |
11639 | eh_frame = elf_eh_frame_section (sec->owner); |
11640 | if ((sec->flags & SEC_RELOC) != 0 | |
11641 | && sec->reloc_count > 0 | |
11642 | && sec != eh_frame) | |
c152c796 | 11643 | { |
5241d853 | 11644 | struct elf_reloc_cookie cookie; |
c152c796 | 11645 | |
5241d853 RS |
11646 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
11647 | ret = FALSE; | |
c152c796 | 11648 | else |
c152c796 | 11649 | { |
5241d853 | 11650 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 11651 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
11652 | { |
11653 | ret = FALSE; | |
11654 | break; | |
11655 | } | |
11656 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
11657 | } |
11658 | } | |
9d0a14d3 RS |
11659 | |
11660 | if (ret && eh_frame && elf_fde_list (sec)) | |
11661 | { | |
11662 | struct elf_reloc_cookie cookie; | |
11663 | ||
11664 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
11665 | ret = FALSE; | |
11666 | else | |
11667 | { | |
11668 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
11669 | gc_mark_hook, &cookie)) | |
11670 | ret = FALSE; | |
11671 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
11672 | } | |
11673 | } | |
11674 | ||
c152c796 AM |
11675 | return ret; |
11676 | } | |
11677 | ||
11678 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
11679 | ||
c17d87de NC |
11680 | struct elf_gc_sweep_symbol_info |
11681 | { | |
ccabcbe5 AM |
11682 | struct bfd_link_info *info; |
11683 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
11684 | bfd_boolean); | |
11685 | }; | |
11686 | ||
c152c796 | 11687 | static bfd_boolean |
ccabcbe5 | 11688 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 11689 | { |
c152c796 AM |
11690 | if (h->root.type == bfd_link_hash_warning) |
11691 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11692 | ||
ccabcbe5 AM |
11693 | if ((h->root.type == bfd_link_hash_defined |
11694 | || h->root.type == bfd_link_hash_defweak) | |
11695 | && !h->root.u.def.section->gc_mark | |
11696 | && !(h->root.u.def.section->owner->flags & DYNAMIC)) | |
11697 | { | |
a50b1753 NC |
11698 | struct elf_gc_sweep_symbol_info *inf = |
11699 | (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 AM |
11700 | (*inf->hide_symbol) (inf->info, h, TRUE); |
11701 | } | |
c152c796 AM |
11702 | |
11703 | return TRUE; | |
11704 | } | |
11705 | ||
11706 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
11707 | ||
11708 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
11709 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
11710 | ||
11711 | static bfd_boolean | |
ccabcbe5 | 11712 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
11713 | { |
11714 | bfd *sub; | |
ccabcbe5 AM |
11715 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
11716 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
11717 | unsigned long section_sym_count; | |
11718 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 AM |
11719 | |
11720 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
11721 | { | |
11722 | asection *o; | |
11723 | ||
11724 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
11725 | continue; | |
11726 | ||
11727 | for (o = sub->sections; o != NULL; o = o->next) | |
11728 | { | |
a33dafc3 L |
11729 | /* When any section in a section group is kept, we keep all |
11730 | sections in the section group. If the first member of | |
11731 | the section group is excluded, we will also exclude the | |
11732 | group section. */ | |
11733 | if (o->flags & SEC_GROUP) | |
11734 | { | |
11735 | asection *first = elf_next_in_group (o); | |
11736 | o->gc_mark = first->gc_mark; | |
11737 | } | |
11738 | else if ((o->flags & (SEC_DEBUGGING | SEC_LINKER_CREATED)) != 0 | |
24007750 | 11739 | || (o->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) |
a33dafc3 | 11740 | { |
24007750 | 11741 | /* Keep debug and special sections. */ |
a33dafc3 L |
11742 | o->gc_mark = 1; |
11743 | } | |
c152c796 AM |
11744 | |
11745 | if (o->gc_mark) | |
11746 | continue; | |
11747 | ||
11748 | /* Skip sweeping sections already excluded. */ | |
11749 | if (o->flags & SEC_EXCLUDE) | |
11750 | continue; | |
11751 | ||
11752 | /* Since this is early in the link process, it is simple | |
11753 | to remove a section from the output. */ | |
11754 | o->flags |= SEC_EXCLUDE; | |
11755 | ||
c55fe096 | 11756 | if (info->print_gc_sections && o->size != 0) |
c17d87de NC |
11757 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
11758 | ||
c152c796 AM |
11759 | /* But we also have to update some of the relocation |
11760 | info we collected before. */ | |
11761 | if (gc_sweep_hook | |
e8aaee2a AM |
11762 | && (o->flags & SEC_RELOC) != 0 |
11763 | && o->reloc_count > 0 | |
11764 | && !bfd_is_abs_section (o->output_section)) | |
c152c796 AM |
11765 | { |
11766 | Elf_Internal_Rela *internal_relocs; | |
11767 | bfd_boolean r; | |
11768 | ||
11769 | internal_relocs | |
11770 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
11771 | info->keep_memory); | |
11772 | if (internal_relocs == NULL) | |
11773 | return FALSE; | |
11774 | ||
11775 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
11776 | ||
11777 | if (elf_section_data (o)->relocs != internal_relocs) | |
11778 | free (internal_relocs); | |
11779 | ||
11780 | if (!r) | |
11781 | return FALSE; | |
11782 | } | |
11783 | } | |
11784 | } | |
11785 | ||
11786 | /* Remove the symbols that were in the swept sections from the dynamic | |
11787 | symbol table. GCFIXME: Anyone know how to get them out of the | |
11788 | static symbol table as well? */ | |
ccabcbe5 AM |
11789 | sweep_info.info = info; |
11790 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
11791 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
11792 | &sweep_info); | |
c152c796 | 11793 | |
ccabcbe5 | 11794 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
11795 | return TRUE; |
11796 | } | |
11797 | ||
11798 | /* Propagate collected vtable information. This is called through | |
11799 | elf_link_hash_traverse. */ | |
11800 | ||
11801 | static bfd_boolean | |
11802 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
11803 | { | |
11804 | if (h->root.type == bfd_link_hash_warning) | |
11805 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11806 | ||
11807 | /* Those that are not vtables. */ | |
f6e332e6 | 11808 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
11809 | return TRUE; |
11810 | ||
11811 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 11812 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
11813 | return TRUE; |
11814 | ||
11815 | /* If we've already been done, exit. */ | |
f6e332e6 | 11816 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
11817 | return TRUE; |
11818 | ||
11819 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 11820 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 11821 | |
f6e332e6 | 11822 | if (h->vtable->used == NULL) |
c152c796 AM |
11823 | { |
11824 | /* None of this table's entries were referenced. Re-use the | |
11825 | parent's table. */ | |
f6e332e6 AM |
11826 | h->vtable->used = h->vtable->parent->vtable->used; |
11827 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
11828 | } |
11829 | else | |
11830 | { | |
11831 | size_t n; | |
11832 | bfd_boolean *cu, *pu; | |
11833 | ||
11834 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 11835 | cu = h->vtable->used; |
c152c796 | 11836 | cu[-1] = TRUE; |
f6e332e6 | 11837 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
11838 | if (pu != NULL) |
11839 | { | |
11840 | const struct elf_backend_data *bed; | |
11841 | unsigned int log_file_align; | |
11842 | ||
11843 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
11844 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 11845 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
11846 | while (n--) |
11847 | { | |
11848 | if (*pu) | |
11849 | *cu = TRUE; | |
11850 | pu++; | |
11851 | cu++; | |
11852 | } | |
11853 | } | |
11854 | } | |
11855 | ||
11856 | return TRUE; | |
11857 | } | |
11858 | ||
11859 | static bfd_boolean | |
11860 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
11861 | { | |
11862 | asection *sec; | |
11863 | bfd_vma hstart, hend; | |
11864 | Elf_Internal_Rela *relstart, *relend, *rel; | |
11865 | const struct elf_backend_data *bed; | |
11866 | unsigned int log_file_align; | |
11867 | ||
11868 | if (h->root.type == bfd_link_hash_warning) | |
11869 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11870 | ||
11871 | /* Take care of both those symbols that do not describe vtables as | |
11872 | well as those that are not loaded. */ | |
f6e332e6 | 11873 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
11874 | return TRUE; |
11875 | ||
11876 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
11877 | || h->root.type == bfd_link_hash_defweak); | |
11878 | ||
11879 | sec = h->root.u.def.section; | |
11880 | hstart = h->root.u.def.value; | |
11881 | hend = hstart + h->size; | |
11882 | ||
11883 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
11884 | if (!relstart) | |
11885 | return *(bfd_boolean *) okp = FALSE; | |
11886 | bed = get_elf_backend_data (sec->owner); | |
11887 | log_file_align = bed->s->log_file_align; | |
11888 | ||
11889 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
11890 | ||
11891 | for (rel = relstart; rel < relend; ++rel) | |
11892 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
11893 | { | |
11894 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
11895 | if (h->vtable->used |
11896 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
11897 | { |
11898 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 11899 | if (h->vtable->used[entry]) |
c152c796 AM |
11900 | continue; |
11901 | } | |
11902 | /* Otherwise, kill it. */ | |
11903 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
11904 | } | |
11905 | ||
11906 | return TRUE; | |
11907 | } | |
11908 | ||
87538722 AM |
11909 | /* Mark sections containing dynamically referenced symbols. When |
11910 | building shared libraries, we must assume that any visible symbol is | |
11911 | referenced. */ | |
715df9b8 | 11912 | |
64d03ab5 AM |
11913 | bfd_boolean |
11914 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 11915 | { |
87538722 AM |
11916 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
11917 | ||
715df9b8 EB |
11918 | if (h->root.type == bfd_link_hash_warning) |
11919 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
11920 | ||
11921 | if ((h->root.type == bfd_link_hash_defined | |
11922 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 11923 | && (h->ref_dynamic |
5adcfd8b | 11924 | || (!info->executable |
87538722 AM |
11925 | && h->def_regular |
11926 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL | |
11927 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN))) | |
715df9b8 EB |
11928 | h->root.u.def.section->flags |= SEC_KEEP; |
11929 | ||
11930 | return TRUE; | |
11931 | } | |
3b36f7e6 | 11932 | |
74f0fb50 AM |
11933 | /* Keep all sections containing symbols undefined on the command-line, |
11934 | and the section containing the entry symbol. */ | |
11935 | ||
11936 | void | |
11937 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
11938 | { | |
11939 | struct bfd_sym_chain *sym; | |
11940 | ||
11941 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
11942 | { | |
11943 | struct elf_link_hash_entry *h; | |
11944 | ||
11945 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
11946 | FALSE, FALSE, FALSE); | |
11947 | ||
11948 | if (h != NULL | |
11949 | && (h->root.type == bfd_link_hash_defined | |
11950 | || h->root.type == bfd_link_hash_defweak) | |
11951 | && !bfd_is_abs_section (h->root.u.def.section)) | |
11952 | h->root.u.def.section->flags |= SEC_KEEP; | |
11953 | } | |
11954 | } | |
11955 | ||
c152c796 AM |
11956 | /* Do mark and sweep of unused sections. */ |
11957 | ||
11958 | bfd_boolean | |
11959 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
11960 | { | |
11961 | bfd_boolean ok = TRUE; | |
11962 | bfd *sub; | |
6a5bb875 | 11963 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 11964 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
c152c796 | 11965 | |
64d03ab5 | 11966 | if (!bed->can_gc_sections |
715df9b8 | 11967 | || !is_elf_hash_table (info->hash)) |
c152c796 AM |
11968 | { |
11969 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
11970 | return TRUE; | |
11971 | } | |
11972 | ||
74f0fb50 AM |
11973 | bed->gc_keep (info); |
11974 | ||
9d0a14d3 RS |
11975 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
11976 | at the .eh_frame section if we can mark the FDEs individually. */ | |
11977 | _bfd_elf_begin_eh_frame_parsing (info); | |
11978 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
11979 | { | |
11980 | asection *sec; | |
11981 | struct elf_reloc_cookie cookie; | |
11982 | ||
11983 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
11984 | if (sec && init_reloc_cookie_for_section (&cookie, info, sec)) | |
11985 | { | |
11986 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
11987 | if (elf_section_data (sec)->sec_info) | |
11988 | elf_eh_frame_section (sub) = sec; | |
11989 | fini_reloc_cookie_for_section (&cookie, sec); | |
11990 | } | |
11991 | } | |
11992 | _bfd_elf_end_eh_frame_parsing (info); | |
11993 | ||
c152c796 AM |
11994 | /* Apply transitive closure to the vtable entry usage info. */ |
11995 | elf_link_hash_traverse (elf_hash_table (info), | |
11996 | elf_gc_propagate_vtable_entries_used, | |
11997 | &ok); | |
11998 | if (!ok) | |
11999 | return FALSE; | |
12000 | ||
12001 | /* Kill the vtable relocations that were not used. */ | |
12002 | elf_link_hash_traverse (elf_hash_table (info), | |
12003 | elf_gc_smash_unused_vtentry_relocs, | |
12004 | &ok); | |
12005 | if (!ok) | |
12006 | return FALSE; | |
12007 | ||
715df9b8 EB |
12008 | /* Mark dynamically referenced symbols. */ |
12009 | if (elf_hash_table (info)->dynamic_sections_created) | |
12010 | elf_link_hash_traverse (elf_hash_table (info), | |
64d03ab5 | 12011 | bed->gc_mark_dynamic_ref, |
87538722 | 12012 | info); |
c152c796 | 12013 | |
715df9b8 | 12014 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 12015 | gc_mark_hook = bed->gc_mark_hook; |
c152c796 AM |
12016 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
12017 | { | |
12018 | asection *o; | |
12019 | ||
12020 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
12021 | continue; | |
12022 | ||
24007750 | 12023 | /* Also keep SHT_NOTE sections. */ |
c152c796 | 12024 | for (o = sub->sections; o != NULL; o = o->next) |
24007750 L |
12025 | if ((o->flags & SEC_EXCLUDE) == 0 |
12026 | && ((o->flags & SEC_KEEP) != 0 | |
12027 | || elf_section_data (o)->this_hdr.sh_type == SHT_NOTE) | |
12028 | && !o->gc_mark) | |
39c2f51b AM |
12029 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) |
12030 | return FALSE; | |
c152c796 AM |
12031 | } |
12032 | ||
6a5bb875 PB |
12033 | /* Allow the backend to mark additional target specific sections. */ |
12034 | if (bed->gc_mark_extra_sections) | |
74f0fb50 | 12035 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 12036 | |
c152c796 | 12037 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 12038 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
12039 | } |
12040 | \f | |
12041 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
12042 | ||
12043 | bfd_boolean | |
12044 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
12045 | asection *sec, | |
12046 | struct elf_link_hash_entry *h, | |
12047 | bfd_vma offset) | |
12048 | { | |
12049 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
12050 | struct elf_link_hash_entry **search, *child; | |
12051 | bfd_size_type extsymcount; | |
12052 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12053 | ||
12054 | /* The sh_info field of the symtab header tells us where the | |
12055 | external symbols start. We don't care about the local symbols at | |
12056 | this point. */ | |
12057 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
12058 | if (!elf_bad_symtab (abfd)) | |
12059 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
12060 | ||
12061 | sym_hashes = elf_sym_hashes (abfd); | |
12062 | sym_hashes_end = sym_hashes + extsymcount; | |
12063 | ||
12064 | /* Hunt down the child symbol, which is in this section at the same | |
12065 | offset as the relocation. */ | |
12066 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
12067 | { | |
12068 | if ((child = *search) != NULL | |
12069 | && (child->root.type == bfd_link_hash_defined | |
12070 | || child->root.type == bfd_link_hash_defweak) | |
12071 | && child->root.u.def.section == sec | |
12072 | && child->root.u.def.value == offset) | |
12073 | goto win; | |
12074 | } | |
12075 | ||
d003868e AM |
12076 | (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT", |
12077 | abfd, sec, (unsigned long) offset); | |
c152c796 AM |
12078 | bfd_set_error (bfd_error_invalid_operation); |
12079 | return FALSE; | |
12080 | ||
12081 | win: | |
f6e332e6 AM |
12082 | if (!child->vtable) |
12083 | { | |
a50b1753 NC |
12084 | child->vtable = (struct elf_link_virtual_table_entry *) |
12085 | bfd_zalloc (abfd, sizeof (*child->vtable)); | |
f6e332e6 AM |
12086 | if (!child->vtable) |
12087 | return FALSE; | |
12088 | } | |
c152c796 AM |
12089 | if (!h) |
12090 | { | |
12091 | /* This *should* only be the absolute section. It could potentially | |
12092 | be that someone has defined a non-global vtable though, which | |
12093 | would be bad. It isn't worth paging in the local symbols to be | |
12094 | sure though; that case should simply be handled by the assembler. */ | |
12095 | ||
f6e332e6 | 12096 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
12097 | } |
12098 | else | |
f6e332e6 | 12099 | child->vtable->parent = h; |
c152c796 AM |
12100 | |
12101 | return TRUE; | |
12102 | } | |
12103 | ||
12104 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
12105 | ||
12106 | bfd_boolean | |
12107 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
12108 | asection *sec ATTRIBUTE_UNUSED, | |
12109 | struct elf_link_hash_entry *h, | |
12110 | bfd_vma addend) | |
12111 | { | |
12112 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12113 | unsigned int log_file_align = bed->s->log_file_align; | |
12114 | ||
f6e332e6 AM |
12115 | if (!h->vtable) |
12116 | { | |
a50b1753 NC |
12117 | h->vtable = (struct elf_link_virtual_table_entry *) |
12118 | bfd_zalloc (abfd, sizeof (*h->vtable)); | |
f6e332e6 AM |
12119 | if (!h->vtable) |
12120 | return FALSE; | |
12121 | } | |
12122 | ||
12123 | if (addend >= h->vtable->size) | |
c152c796 AM |
12124 | { |
12125 | size_t size, bytes, file_align; | |
f6e332e6 | 12126 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
12127 | |
12128 | /* While the symbol is undefined, we have to be prepared to handle | |
12129 | a zero size. */ | |
12130 | file_align = 1 << log_file_align; | |
12131 | if (h->root.type == bfd_link_hash_undefined) | |
12132 | size = addend + file_align; | |
12133 | else | |
12134 | { | |
12135 | size = h->size; | |
12136 | if (addend >= size) | |
12137 | { | |
12138 | /* Oops! We've got a reference past the defined end of | |
12139 | the table. This is probably a bug -- shall we warn? */ | |
12140 | size = addend + file_align; | |
12141 | } | |
12142 | } | |
12143 | size = (size + file_align - 1) & -file_align; | |
12144 | ||
12145 | /* Allocate one extra entry for use as a "done" flag for the | |
12146 | consolidation pass. */ | |
12147 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
12148 | ||
12149 | if (ptr) | |
12150 | { | |
a50b1753 | 12151 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
12152 | |
12153 | if (ptr != NULL) | |
12154 | { | |
12155 | size_t oldbytes; | |
12156 | ||
f6e332e6 | 12157 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
12158 | * sizeof (bfd_boolean)); |
12159 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
12160 | } | |
12161 | } | |
12162 | else | |
a50b1753 | 12163 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
12164 | |
12165 | if (ptr == NULL) | |
12166 | return FALSE; | |
12167 | ||
12168 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
12169 | h->vtable->used = ptr + 1; |
12170 | h->vtable->size = size; | |
c152c796 AM |
12171 | } |
12172 | ||
f6e332e6 | 12173 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
12174 | |
12175 | return TRUE; | |
12176 | } | |
12177 | ||
12178 | struct alloc_got_off_arg { | |
12179 | bfd_vma gotoff; | |
10455f89 | 12180 | struct bfd_link_info *info; |
c152c796 AM |
12181 | }; |
12182 | ||
12183 | /* We need a special top-level link routine to convert got reference counts | |
12184 | to real got offsets. */ | |
12185 | ||
12186 | static bfd_boolean | |
12187 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
12188 | { | |
a50b1753 | 12189 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
12190 | bfd *obfd = gofarg->info->output_bfd; |
12191 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 AM |
12192 | |
12193 | if (h->root.type == bfd_link_hash_warning) | |
12194 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
12195 | ||
12196 | if (h->got.refcount > 0) | |
12197 | { | |
12198 | h->got.offset = gofarg->gotoff; | |
10455f89 | 12199 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
12200 | } |
12201 | else | |
12202 | h->got.offset = (bfd_vma) -1; | |
12203 | ||
12204 | return TRUE; | |
12205 | } | |
12206 | ||
12207 | /* And an accompanying bit to work out final got entry offsets once | |
12208 | we're done. Should be called from final_link. */ | |
12209 | ||
12210 | bfd_boolean | |
12211 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
12212 | struct bfd_link_info *info) | |
12213 | { | |
12214 | bfd *i; | |
12215 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12216 | bfd_vma gotoff; | |
c152c796 AM |
12217 | struct alloc_got_off_arg gofarg; |
12218 | ||
10455f89 HPN |
12219 | BFD_ASSERT (abfd == info->output_bfd); |
12220 | ||
c152c796 AM |
12221 | if (! is_elf_hash_table (info->hash)) |
12222 | return FALSE; | |
12223 | ||
12224 | /* The GOT offset is relative to the .got section, but the GOT header is | |
12225 | put into the .got.plt section, if the backend uses it. */ | |
12226 | if (bed->want_got_plt) | |
12227 | gotoff = 0; | |
12228 | else | |
12229 | gotoff = bed->got_header_size; | |
12230 | ||
12231 | /* Do the local .got entries first. */ | |
12232 | for (i = info->input_bfds; i; i = i->link_next) | |
12233 | { | |
12234 | bfd_signed_vma *local_got; | |
12235 | bfd_size_type j, locsymcount; | |
12236 | Elf_Internal_Shdr *symtab_hdr; | |
12237 | ||
12238 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
12239 | continue; | |
12240 | ||
12241 | local_got = elf_local_got_refcounts (i); | |
12242 | if (!local_got) | |
12243 | continue; | |
12244 | ||
12245 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
12246 | if (elf_bad_symtab (i)) | |
12247 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
12248 | else | |
12249 | locsymcount = symtab_hdr->sh_info; | |
12250 | ||
12251 | for (j = 0; j < locsymcount; ++j) | |
12252 | { | |
12253 | if (local_got[j] > 0) | |
12254 | { | |
12255 | local_got[j] = gotoff; | |
10455f89 | 12256 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
12257 | } |
12258 | else | |
12259 | local_got[j] = (bfd_vma) -1; | |
12260 | } | |
12261 | } | |
12262 | ||
12263 | /* Then the global .got entries. .plt refcounts are handled by | |
12264 | adjust_dynamic_symbol */ | |
12265 | gofarg.gotoff = gotoff; | |
10455f89 | 12266 | gofarg.info = info; |
c152c796 AM |
12267 | elf_link_hash_traverse (elf_hash_table (info), |
12268 | elf_gc_allocate_got_offsets, | |
12269 | &gofarg); | |
12270 | return TRUE; | |
12271 | } | |
12272 | ||
12273 | /* Many folk need no more in the way of final link than this, once | |
12274 | got entry reference counting is enabled. */ | |
12275 | ||
12276 | bfd_boolean | |
12277 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
12278 | { | |
12279 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
12280 | return FALSE; | |
12281 | ||
12282 | /* Invoke the regular ELF backend linker to do all the work. */ | |
12283 | return bfd_elf_final_link (abfd, info); | |
12284 | } | |
12285 | ||
12286 | bfd_boolean | |
12287 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
12288 | { | |
a50b1753 | 12289 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
12290 | |
12291 | if (rcookie->bad_symtab) | |
12292 | rcookie->rel = rcookie->rels; | |
12293 | ||
12294 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
12295 | { | |
12296 | unsigned long r_symndx; | |
12297 | ||
12298 | if (! rcookie->bad_symtab) | |
12299 | if (rcookie->rel->r_offset > offset) | |
12300 | return FALSE; | |
12301 | if (rcookie->rel->r_offset != offset) | |
12302 | continue; | |
12303 | ||
12304 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 12305 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
12306 | return TRUE; |
12307 | ||
12308 | if (r_symndx >= rcookie->locsymcount | |
12309 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12310 | { | |
12311 | struct elf_link_hash_entry *h; | |
12312 | ||
12313 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
12314 | ||
12315 | while (h->root.type == bfd_link_hash_indirect | |
12316 | || h->root.type == bfd_link_hash_warning) | |
12317 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
12318 | ||
12319 | if ((h->root.type == bfd_link_hash_defined | |
12320 | || h->root.type == bfd_link_hash_defweak) | |
12321 | && elf_discarded_section (h->root.u.def.section)) | |
12322 | return TRUE; | |
12323 | else | |
12324 | return FALSE; | |
12325 | } | |
12326 | else | |
12327 | { | |
12328 | /* It's not a relocation against a global symbol, | |
12329 | but it could be a relocation against a local | |
12330 | symbol for a discarded section. */ | |
12331 | asection *isec; | |
12332 | Elf_Internal_Sym *isym; | |
12333 | ||
12334 | /* Need to: get the symbol; get the section. */ | |
12335 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c AM |
12336 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
12337 | if (isec != NULL && elf_discarded_section (isec)) | |
12338 | return TRUE; | |
c152c796 AM |
12339 | } |
12340 | return FALSE; | |
12341 | } | |
12342 | return FALSE; | |
12343 | } | |
12344 | ||
12345 | /* Discard unneeded references to discarded sections. | |
12346 | Returns TRUE if any section's size was changed. */ | |
12347 | /* This function assumes that the relocations are in sorted order, | |
12348 | which is true for all known assemblers. */ | |
12349 | ||
12350 | bfd_boolean | |
12351 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) | |
12352 | { | |
12353 | struct elf_reloc_cookie cookie; | |
12354 | asection *stab, *eh; | |
c152c796 AM |
12355 | const struct elf_backend_data *bed; |
12356 | bfd *abfd; | |
c152c796 AM |
12357 | bfd_boolean ret = FALSE; |
12358 | ||
12359 | if (info->traditional_format | |
12360 | || !is_elf_hash_table (info->hash)) | |
12361 | return FALSE; | |
12362 | ||
ca92cecb | 12363 | _bfd_elf_begin_eh_frame_parsing (info); |
c152c796 AM |
12364 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
12365 | { | |
12366 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
12367 | continue; | |
12368 | ||
12369 | bed = get_elf_backend_data (abfd); | |
12370 | ||
12371 | if ((abfd->flags & DYNAMIC) != 0) | |
12372 | continue; | |
12373 | ||
8da3dbc5 AM |
12374 | eh = NULL; |
12375 | if (!info->relocatable) | |
12376 | { | |
12377 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); | |
12378 | if (eh != NULL | |
eea6121a | 12379 | && (eh->size == 0 |
8da3dbc5 AM |
12380 | || bfd_is_abs_section (eh->output_section))) |
12381 | eh = NULL; | |
12382 | } | |
c152c796 AM |
12383 | |
12384 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
12385 | if (stab != NULL | |
eea6121a | 12386 | && (stab->size == 0 |
c152c796 AM |
12387 | || bfd_is_abs_section (stab->output_section) |
12388 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) | |
12389 | stab = NULL; | |
12390 | ||
12391 | if (stab == NULL | |
12392 | && eh == NULL | |
12393 | && bed->elf_backend_discard_info == NULL) | |
12394 | continue; | |
12395 | ||
5241d853 RS |
12396 | if (!init_reloc_cookie (&cookie, info, abfd)) |
12397 | return FALSE; | |
c152c796 | 12398 | |
5241d853 RS |
12399 | if (stab != NULL |
12400 | && stab->reloc_count > 0 | |
12401 | && init_reloc_cookie_rels (&cookie, info, abfd, stab)) | |
c152c796 | 12402 | { |
5241d853 RS |
12403 | if (_bfd_discard_section_stabs (abfd, stab, |
12404 | elf_section_data (stab)->sec_info, | |
12405 | bfd_elf_reloc_symbol_deleted_p, | |
12406 | &cookie)) | |
12407 | ret = TRUE; | |
12408 | fini_reloc_cookie_rels (&cookie, stab); | |
c152c796 AM |
12409 | } |
12410 | ||
5241d853 RS |
12411 | if (eh != NULL |
12412 | && init_reloc_cookie_rels (&cookie, info, abfd, eh)) | |
c152c796 | 12413 | { |
ca92cecb | 12414 | _bfd_elf_parse_eh_frame (abfd, info, eh, &cookie); |
c152c796 AM |
12415 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
12416 | bfd_elf_reloc_symbol_deleted_p, | |
12417 | &cookie)) | |
12418 | ret = TRUE; | |
5241d853 | 12419 | fini_reloc_cookie_rels (&cookie, eh); |
c152c796 AM |
12420 | } |
12421 | ||
12422 | if (bed->elf_backend_discard_info != NULL | |
12423 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
12424 | ret = TRUE; | |
12425 | ||
5241d853 | 12426 | fini_reloc_cookie (&cookie, abfd); |
c152c796 | 12427 | } |
ca92cecb | 12428 | _bfd_elf_end_eh_frame_parsing (info); |
c152c796 AM |
12429 | |
12430 | if (info->eh_frame_hdr | |
12431 | && !info->relocatable | |
12432 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) | |
12433 | ret = TRUE; | |
12434 | ||
12435 | return ret; | |
12436 | } | |
082b7297 | 12437 | |
9659de1c AM |
12438 | /* For a SHT_GROUP section, return the group signature. For other |
12439 | sections, return the normal section name. */ | |
12440 | ||
12441 | static const char * | |
12442 | section_signature (asection *sec) | |
12443 | { | |
12444 | if ((sec->flags & SEC_GROUP) != 0 | |
12445 | && elf_next_in_group (sec) != NULL | |
12446 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
12447 | return elf_group_name (elf_next_in_group (sec)); | |
12448 | return sec->name; | |
12449 | } | |
12450 | ||
082b7297 | 12451 | void |
9659de1c | 12452 | _bfd_elf_section_already_linked (bfd *abfd, asection *sec, |
c0f00686 | 12453 | struct bfd_link_info *info) |
082b7297 L |
12454 | { |
12455 | flagword flags; | |
6d2cd210 | 12456 | const char *name, *p; |
082b7297 L |
12457 | struct bfd_section_already_linked *l; |
12458 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
3d7f7666 | 12459 | |
3d7f7666 L |
12460 | if (sec->output_section == bfd_abs_section_ptr) |
12461 | return; | |
082b7297 L |
12462 | |
12463 | flags = sec->flags; | |
3d7f7666 | 12464 | |
c2370991 AM |
12465 | /* Return if it isn't a linkonce section. A comdat group section |
12466 | also has SEC_LINK_ONCE set. */ | |
12467 | if ((flags & SEC_LINK_ONCE) == 0) | |
082b7297 L |
12468 | return; |
12469 | ||
c2370991 AM |
12470 | /* Don't put group member sections on our list of already linked |
12471 | sections. They are handled as a group via their group section. */ | |
12472 | if (elf_sec_group (sec) != NULL) | |
12473 | return; | |
3d7f7666 | 12474 | |
082b7297 L |
12475 | /* FIXME: When doing a relocatable link, we may have trouble |
12476 | copying relocations in other sections that refer to local symbols | |
12477 | in the section being discarded. Those relocations will have to | |
12478 | be converted somehow; as of this writing I'm not sure that any of | |
12479 | the backends handle that correctly. | |
12480 | ||
12481 | It is tempting to instead not discard link once sections when | |
12482 | doing a relocatable link (technically, they should be discarded | |
12483 | whenever we are building constructors). However, that fails, | |
12484 | because the linker winds up combining all the link once sections | |
12485 | into a single large link once section, which defeats the purpose | |
12486 | of having link once sections in the first place. | |
12487 | ||
12488 | Also, not merging link once sections in a relocatable link | |
12489 | causes trouble for MIPS ELF, which relies on link once semantics | |
12490 | to handle the .reginfo section correctly. */ | |
12491 | ||
9659de1c | 12492 | name = section_signature (sec); |
082b7297 | 12493 | |
0112cd26 | 12494 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
6d2cd210 JJ |
12495 | && (p = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
12496 | p++; | |
12497 | else | |
12498 | p = name; | |
12499 | ||
12500 | already_linked_list = bfd_section_already_linked_table_lookup (p); | |
082b7297 L |
12501 | |
12502 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12503 | { | |
c2370991 AM |
12504 | /* We may have 2 different types of sections on the list: group |
12505 | sections and linkonce sections. Match like sections. */ | |
3d7f7666 | 12506 | if ((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) |
9659de1c | 12507 | && strcmp (name, section_signature (l->sec)) == 0 |
082b7297 L |
12508 | && bfd_coff_get_comdat_section (l->sec->owner, l->sec) == NULL) |
12509 | { | |
12510 | /* The section has already been linked. See if we should | |
6d2cd210 | 12511 | issue a warning. */ |
082b7297 L |
12512 | switch (flags & SEC_LINK_DUPLICATES) |
12513 | { | |
12514 | default: | |
12515 | abort (); | |
12516 | ||
12517 | case SEC_LINK_DUPLICATES_DISCARD: | |
12518 | break; | |
12519 | ||
12520 | case SEC_LINK_DUPLICATES_ONE_ONLY: | |
12521 | (*_bfd_error_handler) | |
c93625e2 | 12522 | (_("%B: ignoring duplicate section `%A'"), |
d003868e | 12523 | abfd, sec); |
082b7297 L |
12524 | break; |
12525 | ||
12526 | case SEC_LINK_DUPLICATES_SAME_SIZE: | |
12527 | if (sec->size != l->sec->size) | |
12528 | (*_bfd_error_handler) | |
c93625e2 | 12529 | (_("%B: duplicate section `%A' has different size"), |
d003868e | 12530 | abfd, sec); |
082b7297 | 12531 | break; |
ea5158d8 DJ |
12532 | |
12533 | case SEC_LINK_DUPLICATES_SAME_CONTENTS: | |
12534 | if (sec->size != l->sec->size) | |
12535 | (*_bfd_error_handler) | |
c93625e2 | 12536 | (_("%B: duplicate section `%A' has different size"), |
ea5158d8 DJ |
12537 | abfd, sec); |
12538 | else if (sec->size != 0) | |
12539 | { | |
12540 | bfd_byte *sec_contents, *l_sec_contents; | |
12541 | ||
12542 | if (!bfd_malloc_and_get_section (abfd, sec, &sec_contents)) | |
12543 | (*_bfd_error_handler) | |
c93625e2 | 12544 | (_("%B: warning: could not read contents of section `%A'"), |
ea5158d8 DJ |
12545 | abfd, sec); |
12546 | else if (!bfd_malloc_and_get_section (l->sec->owner, l->sec, | |
12547 | &l_sec_contents)) | |
12548 | (*_bfd_error_handler) | |
c93625e2 | 12549 | (_("%B: warning: could not read contents of section `%A'"), |
ea5158d8 DJ |
12550 | l->sec->owner, l->sec); |
12551 | else if (memcmp (sec_contents, l_sec_contents, sec->size) != 0) | |
12552 | (*_bfd_error_handler) | |
c93625e2 | 12553 | (_("%B: warning: duplicate section `%A' has different contents"), |
ea5158d8 DJ |
12554 | abfd, sec); |
12555 | ||
12556 | if (sec_contents) | |
12557 | free (sec_contents); | |
12558 | if (l_sec_contents) | |
12559 | free (l_sec_contents); | |
12560 | } | |
12561 | break; | |
082b7297 L |
12562 | } |
12563 | ||
12564 | /* Set the output_section field so that lang_add_section | |
12565 | does not create a lang_input_section structure for this | |
12566 | section. Since there might be a symbol in the section | |
12567 | being discarded, we must retain a pointer to the section | |
12568 | which we are really going to use. */ | |
12569 | sec->output_section = bfd_abs_section_ptr; | |
12570 | sec->kept_section = l->sec; | |
3b36f7e6 | 12571 | |
082b7297 | 12572 | if (flags & SEC_GROUP) |
3d7f7666 L |
12573 | { |
12574 | asection *first = elf_next_in_group (sec); | |
12575 | asection *s = first; | |
12576 | ||
12577 | while (s != NULL) | |
12578 | { | |
12579 | s->output_section = bfd_abs_section_ptr; | |
12580 | /* Record which group discards it. */ | |
12581 | s->kept_section = l->sec; | |
12582 | s = elf_next_in_group (s); | |
12583 | /* These lists are circular. */ | |
12584 | if (s == first) | |
12585 | break; | |
12586 | } | |
12587 | } | |
082b7297 L |
12588 | |
12589 | return; | |
12590 | } | |
12591 | } | |
12592 | ||
c2370991 AM |
12593 | /* A single member comdat group section may be discarded by a |
12594 | linkonce section and vice versa. */ | |
12595 | ||
12596 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 12597 | { |
c2370991 AM |
12598 | asection *first = elf_next_in_group (sec); |
12599 | ||
12600 | if (first != NULL && elf_next_in_group (first) == first) | |
12601 | /* Check this single member group against linkonce sections. */ | |
12602 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12603 | if ((l->sec->flags & SEC_GROUP) == 0 | |
12604 | && bfd_coff_get_comdat_section (l->sec->owner, l->sec) == NULL | |
12605 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
12606 | { | |
12607 | first->output_section = bfd_abs_section_ptr; | |
12608 | first->kept_section = l->sec; | |
12609 | sec->output_section = bfd_abs_section_ptr; | |
12610 | break; | |
12611 | } | |
3d7f7666 L |
12612 | } |
12613 | else | |
c2370991 | 12614 | /* Check this linkonce section against single member groups. */ |
6d2cd210 JJ |
12615 | for (l = already_linked_list->entry; l != NULL; l = l->next) |
12616 | if (l->sec->flags & SEC_GROUP) | |
12617 | { | |
12618 | asection *first = elf_next_in_group (l->sec); | |
12619 | ||
12620 | if (first != NULL | |
12621 | && elf_next_in_group (first) == first | |
c0f00686 | 12622 | && bfd_elf_match_symbols_in_sections (first, sec, info)) |
6d2cd210 JJ |
12623 | { |
12624 | sec->output_section = bfd_abs_section_ptr; | |
c2370991 | 12625 | sec->kept_section = first; |
6d2cd210 JJ |
12626 | break; |
12627 | } | |
12628 | } | |
12629 | ||
80c29487 JK |
12630 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
12631 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
12632 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
12633 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
12634 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
12635 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
12636 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
12637 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
12638 | The reverse order cannot happen as there is never a bfd with only the | |
12639 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
12640 | matter as here were are looking only for cross-bfd sections. */ | |
12641 | ||
12642 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
12643 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12644 | if ((l->sec->flags & SEC_GROUP) == 0 | |
12645 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
12646 | { | |
12647 | if (abfd != l->sec->owner) | |
12648 | sec->output_section = bfd_abs_section_ptr; | |
12649 | break; | |
12650 | } | |
12651 | ||
082b7297 | 12652 | /* This is the first section with this name. Record it. */ |
a6626e8c | 12653 | if (! bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 12654 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
082b7297 | 12655 | } |
81e1b023 | 12656 | |
a4d8e49b L |
12657 | bfd_boolean |
12658 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
12659 | { | |
12660 | return sym->st_shndx == SHN_COMMON; | |
12661 | } | |
12662 | ||
12663 | unsigned int | |
12664 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
12665 | { | |
12666 | return SHN_COMMON; | |
12667 | } | |
12668 | ||
12669 | asection * | |
12670 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
12671 | { | |
12672 | return bfd_com_section_ptr; | |
12673 | } | |
10455f89 HPN |
12674 | |
12675 | bfd_vma | |
12676 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
12677 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12678 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
12679 | bfd *ibfd ATTRIBUTE_UNUSED, | |
12680 | unsigned long symndx ATTRIBUTE_UNUSED) | |
12681 | { | |
12682 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12683 | return bed->s->arch_size / 8; | |
12684 | } | |
83bac4b0 NC |
12685 | |
12686 | /* Routines to support the creation of dynamic relocs. */ | |
12687 | ||
83bac4b0 NC |
12688 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
12689 | ||
12690 | static const char * | |
12691 | get_dynamic_reloc_section_name (bfd * abfd, | |
12692 | asection * sec, | |
12693 | bfd_boolean is_rela) | |
12694 | { | |
ddcf1fcf BS |
12695 | char *name; |
12696 | const char *old_name = bfd_get_section_name (NULL, sec); | |
12697 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 12698 | |
ddcf1fcf | 12699 | if (old_name == NULL) |
83bac4b0 NC |
12700 | return NULL; |
12701 | ||
ddcf1fcf BS |
12702 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
12703 | sprintf (name, "%s%s", prefix, old_name); | |
83bac4b0 NC |
12704 | |
12705 | return name; | |
12706 | } | |
12707 | ||
12708 | /* Returns the dynamic reloc section associated with SEC. | |
12709 | If necessary compute the name of the dynamic reloc section based | |
12710 | on SEC's name (looked up in ABFD's string table) and the setting | |
12711 | of IS_RELA. */ | |
12712 | ||
12713 | asection * | |
12714 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
12715 | asection * sec, | |
12716 | bfd_boolean is_rela) | |
12717 | { | |
12718 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
12719 | ||
12720 | if (reloc_sec == NULL) | |
12721 | { | |
12722 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
12723 | ||
12724 | if (name != NULL) | |
12725 | { | |
12726 | reloc_sec = bfd_get_section_by_name (abfd, name); | |
12727 | ||
12728 | if (reloc_sec != NULL) | |
12729 | elf_section_data (sec)->sreloc = reloc_sec; | |
12730 | } | |
12731 | } | |
12732 | ||
12733 | return reloc_sec; | |
12734 | } | |
12735 | ||
12736 | /* Returns the dynamic reloc section associated with SEC. If the | |
12737 | section does not exist it is created and attached to the DYNOBJ | |
12738 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
12739 | structure. | |
f8076f98 | 12740 | |
83bac4b0 NC |
12741 | ALIGNMENT is the alignment for the newly created section and |
12742 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
12743 | or .rel.<SEC's name>. The section name is looked up in the | |
12744 | string table associated with ABFD. */ | |
12745 | ||
12746 | asection * | |
12747 | _bfd_elf_make_dynamic_reloc_section (asection * sec, | |
12748 | bfd * dynobj, | |
12749 | unsigned int alignment, | |
12750 | bfd * abfd, | |
12751 | bfd_boolean is_rela) | |
12752 | { | |
12753 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
12754 | ||
12755 | if (reloc_sec == NULL) | |
12756 | { | |
12757 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
12758 | ||
12759 | if (name == NULL) | |
12760 | return NULL; | |
12761 | ||
12762 | reloc_sec = bfd_get_section_by_name (dynobj, name); | |
12763 | ||
12764 | if (reloc_sec == NULL) | |
12765 | { | |
12766 | flagword flags; | |
12767 | ||
12768 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
12769 | if ((sec->flags & SEC_ALLOC) != 0) | |
12770 | flags |= SEC_ALLOC | SEC_LOAD; | |
12771 | ||
12772 | reloc_sec = bfd_make_section_with_flags (dynobj, name, flags); | |
12773 | if (reloc_sec != NULL) | |
12774 | { | |
12775 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) | |
12776 | reloc_sec = NULL; | |
12777 | } | |
12778 | } | |
12779 | ||
12780 | elf_section_data (sec)->sreloc = reloc_sec; | |
12781 | } | |
12782 | ||
12783 | return reloc_sec; | |
12784 | } | |
1338dd10 PB |
12785 | |
12786 | /* Copy the ELF symbol type associated with a linker hash entry. */ | |
12787 | void | |
12788 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd ATTRIBUTE_UNUSED, | |
12789 | struct bfd_link_hash_entry * hdest, | |
12790 | struct bfd_link_hash_entry * hsrc) | |
12791 | { | |
12792 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *)hdest; | |
12793 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *)hsrc; | |
12794 | ||
12795 | ehdest->type = ehsrc->type; | |
35fc36a8 | 12796 | ehdest->target_internal = ehsrc->target_internal; |
1338dd10 | 12797 | } |
351f65ca L |
12798 | |
12799 | /* Append a RELA relocation REL to section S in BFD. */ | |
12800 | ||
12801 | void | |
12802 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
12803 | { | |
12804 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12805 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
12806 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
12807 | bed->s->swap_reloca_out (abfd, rel, loc); | |
12808 | } | |
12809 | ||
12810 | /* Append a REL relocation REL to section S in BFD. */ | |
12811 | ||
12812 | void | |
12813 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
12814 | { | |
12815 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12816 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
12817 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
12818 | bed->s->swap_reloca_out (abfd, rel, loc); | |
12819 | } |