Commit | Line | Data |
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c906108c | 1 | /* Read ELF (Executable and Linking Format) object files for GDB. |
1bac305b | 2 | |
6aba47ca | 3 | Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4c38e0a4 | 4 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
9b254dd1 | 5 | Free Software Foundation, Inc. |
1bac305b | 6 | |
c906108c SS |
7 | Written by Fred Fish at Cygnus Support. |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "bfd.h" | |
26 | #include "gdb_string.h" | |
27 | #include "elf-bfd.h" | |
31d99776 DJ |
28 | #include "elf/common.h" |
29 | #include "elf/internal.h" | |
c906108c SS |
30 | #include "elf/mips.h" |
31 | #include "symtab.h" | |
32 | #include "symfile.h" | |
33 | #include "objfiles.h" | |
34 | #include "buildsym.h" | |
35 | #include "stabsread.h" | |
36 | #include "gdb-stabs.h" | |
37 | #include "complaints.h" | |
38 | #include "demangle.h" | |
ccefe4c4 | 39 | #include "psympriv.h" |
c906108c | 40 | |
a14ed312 | 41 | extern void _initialize_elfread (void); |
392a587b | 42 | |
c906108c | 43 | /* The struct elfinfo is available only during ELF symbol table and |
6426a772 | 44 | psymtab reading. It is destroyed at the completion of psymtab-reading. |
c906108c SS |
45 | It's local to elf_symfile_read. */ |
46 | ||
c5aa993b JM |
47 | struct elfinfo |
48 | { | |
c5aa993b JM |
49 | asection *stabsect; /* Section pointer for .stab section */ |
50 | asection *stabindexsect; /* Section pointer for .stab.index section */ | |
51 | asection *mdebugsect; /* Section pointer for .mdebug section */ | |
52 | }; | |
c906108c | 53 | |
12b9c64f | 54 | static void free_elfinfo (void *); |
c906108c | 55 | |
31d99776 DJ |
56 | /* Locate the segments in ABFD. */ |
57 | ||
58 | static struct symfile_segment_data * | |
59 | elf_symfile_segments (bfd *abfd) | |
60 | { | |
61 | Elf_Internal_Phdr *phdrs, **segments; | |
62 | long phdrs_size; | |
63 | int num_phdrs, num_segments, num_sections, i; | |
64 | asection *sect; | |
65 | struct symfile_segment_data *data; | |
66 | ||
67 | phdrs_size = bfd_get_elf_phdr_upper_bound (abfd); | |
68 | if (phdrs_size == -1) | |
69 | return NULL; | |
70 | ||
71 | phdrs = alloca (phdrs_size); | |
72 | num_phdrs = bfd_get_elf_phdrs (abfd, phdrs); | |
73 | if (num_phdrs == -1) | |
74 | return NULL; | |
75 | ||
76 | num_segments = 0; | |
77 | segments = alloca (sizeof (Elf_Internal_Phdr *) * num_phdrs); | |
78 | for (i = 0; i < num_phdrs; i++) | |
79 | if (phdrs[i].p_type == PT_LOAD) | |
80 | segments[num_segments++] = &phdrs[i]; | |
81 | ||
82 | if (num_segments == 0) | |
83 | return NULL; | |
84 | ||
85 | data = XZALLOC (struct symfile_segment_data); | |
86 | data->num_segments = num_segments; | |
87 | data->segment_bases = XCALLOC (num_segments, CORE_ADDR); | |
88 | data->segment_sizes = XCALLOC (num_segments, CORE_ADDR); | |
89 | ||
90 | for (i = 0; i < num_segments; i++) | |
91 | { | |
92 | data->segment_bases[i] = segments[i]->p_vaddr; | |
93 | data->segment_sizes[i] = segments[i]->p_memsz; | |
94 | } | |
95 | ||
96 | num_sections = bfd_count_sections (abfd); | |
97 | data->segment_info = XCALLOC (num_sections, int); | |
98 | ||
99 | for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) | |
100 | { | |
101 | int j; | |
102 | CORE_ADDR vma; | |
103 | ||
104 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
105 | continue; | |
106 | ||
107 | vma = bfd_get_section_vma (abfd, sect); | |
108 | ||
109 | for (j = 0; j < num_segments; j++) | |
110 | if (segments[j]->p_memsz > 0 | |
111 | && vma >= segments[j]->p_vaddr | |
a366c65a | 112 | && (vma - segments[j]->p_vaddr) < segments[j]->p_memsz) |
31d99776 DJ |
113 | { |
114 | data->segment_info[i] = j + 1; | |
115 | break; | |
116 | } | |
117 | ||
ad09a548 DJ |
118 | /* We should have found a segment for every non-empty section. |
119 | If we haven't, we will not relocate this section by any | |
120 | offsets we apply to the segments. As an exception, do not | |
121 | warn about SHT_NOBITS sections; in normal ELF execution | |
122 | environments, SHT_NOBITS means zero-initialized and belongs | |
123 | in a segment, but in no-OS environments some tools (e.g. ARM | |
124 | RealView) use SHT_NOBITS for uninitialized data. Since it is | |
125 | uninitialized, it doesn't need a program header. Such | |
126 | binaries are not relocatable. */ | |
127 | if (bfd_get_section_size (sect) > 0 && j == num_segments | |
128 | && (bfd_get_section_flags (abfd, sect) & SEC_LOAD) != 0) | |
31d99776 DJ |
129 | warning (_("Loadable segment \"%s\" outside of ELF segments"), |
130 | bfd_section_name (abfd, sect)); | |
131 | } | |
132 | ||
133 | return data; | |
134 | } | |
135 | ||
c906108c SS |
136 | /* We are called once per section from elf_symfile_read. We |
137 | need to examine each section we are passed, check to see | |
138 | if it is something we are interested in processing, and | |
139 | if so, stash away some access information for the section. | |
140 | ||
141 | For now we recognize the dwarf debug information sections and | |
142 | line number sections from matching their section names. The | |
143 | ELF definition is no real help here since it has no direct | |
144 | knowledge of DWARF (by design, so any debugging format can be | |
145 | used). | |
146 | ||
147 | We also recognize the ".stab" sections used by the Sun compilers | |
148 | released with Solaris 2. | |
149 | ||
150 | FIXME: The section names should not be hardwired strings (what | |
151 | should they be? I don't think most object file formats have enough | |
152 | section flags to specify what kind of debug section it is | |
153 | -kingdon). */ | |
154 | ||
155 | static void | |
12b9c64f | 156 | elf_locate_sections (bfd *ignore_abfd, asection *sectp, void *eip) |
c906108c | 157 | { |
52f0bd74 | 158 | struct elfinfo *ei; |
c906108c SS |
159 | |
160 | ei = (struct elfinfo *) eip; | |
7ce59000 | 161 | if (strcmp (sectp->name, ".stab") == 0) |
c906108c | 162 | { |
c5aa993b | 163 | ei->stabsect = sectp; |
c906108c | 164 | } |
6314a349 | 165 | else if (strcmp (sectp->name, ".stab.index") == 0) |
c906108c | 166 | { |
c5aa993b | 167 | ei->stabindexsect = sectp; |
c906108c | 168 | } |
6314a349 | 169 | else if (strcmp (sectp->name, ".mdebug") == 0) |
c906108c | 170 | { |
c5aa993b | 171 | ei->mdebugsect = sectp; |
c906108c SS |
172 | } |
173 | } | |
174 | ||
c906108c | 175 | static struct minimal_symbol * |
04a679b8 TT |
176 | record_minimal_symbol (const char *name, int name_len, int copy_name, |
177 | CORE_ADDR address, | |
f594e5e9 MC |
178 | enum minimal_symbol_type ms_type, |
179 | asection *bfd_section, struct objfile *objfile) | |
c906108c | 180 | { |
5e2b427d UW |
181 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
182 | ||
bbeae047 | 183 | if (ms_type == mst_text || ms_type == mst_file_text) |
5e2b427d | 184 | address = gdbarch_smash_text_address (gdbarch, address); |
c906108c | 185 | |
04a679b8 TT |
186 | return prim_record_minimal_symbol_full (name, name_len, copy_name, address, |
187 | ms_type, bfd_section->index, | |
188 | bfd_section, objfile); | |
c906108c SS |
189 | } |
190 | ||
191 | /* | |
192 | ||
c5aa993b | 193 | LOCAL FUNCTION |
c906108c | 194 | |
c5aa993b | 195 | elf_symtab_read -- read the symbol table of an ELF file |
c906108c | 196 | |
c5aa993b | 197 | SYNOPSIS |
c906108c | 198 | |
6f610d07 | 199 | void elf_symtab_read (struct objfile *objfile, int type, |
62553543 | 200 | long number_of_symbols, asymbol **symbol_table) |
c906108c | 201 | |
c5aa993b | 202 | DESCRIPTION |
c906108c | 203 | |
62553543 | 204 | Given an objfile, a symbol table, and a flag indicating whether the |
6f610d07 UW |
205 | symbol table contains regular, dynamic, or synthetic symbols, add all |
206 | the global function and data symbols to the minimal symbol table. | |
c906108c | 207 | |
c5aa993b JM |
208 | In stabs-in-ELF, as implemented by Sun, there are some local symbols |
209 | defined in the ELF symbol table, which can be used to locate | |
210 | the beginnings of sections from each ".o" file that was linked to | |
211 | form the executable objfile. We gather any such info and record it | |
212 | in data structures hung off the objfile's private data. | |
c906108c | 213 | |
c5aa993b | 214 | */ |
c906108c | 215 | |
6f610d07 UW |
216 | #define ST_REGULAR 0 |
217 | #define ST_DYNAMIC 1 | |
218 | #define ST_SYNTHETIC 2 | |
219 | ||
c906108c | 220 | static void |
6f610d07 | 221 | elf_symtab_read (struct objfile *objfile, int type, |
04a679b8 TT |
222 | long number_of_symbols, asymbol **symbol_table, |
223 | int copy_names) | |
c906108c | 224 | { |
5e2b427d | 225 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
226 | long storage_needed; |
227 | asymbol *sym; | |
c906108c | 228 | long i; |
c906108c | 229 | CORE_ADDR symaddr; |
d4f3574e | 230 | CORE_ADDR offset; |
c906108c SS |
231 | enum minimal_symbol_type ms_type; |
232 | /* If sectinfo is nonNULL, it contains section info that should end up | |
233 | filed in the objfile. */ | |
234 | struct stab_section_info *sectinfo = NULL; | |
235 | /* If filesym is nonzero, it points to a file symbol, but we haven't | |
236 | seen any section info for it yet. */ | |
237 | asymbol *filesym = 0; | |
1c9e8358 TT |
238 | /* Name of filesym. This is either a constant string or is saved on |
239 | the objfile's obstack. */ | |
240 | char *filesymname = ""; | |
0a6ddd08 | 241 | struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info; |
d4f3574e | 242 | int stripped = (bfd_get_symcount (objfile->obfd) == 0); |
c5aa993b | 243 | |
0cc7b392 | 244 | for (i = 0; i < number_of_symbols; i++) |
c906108c | 245 | { |
0cc7b392 DJ |
246 | sym = symbol_table[i]; |
247 | if (sym->name == NULL || *sym->name == '\0') | |
c906108c | 248 | { |
0cc7b392 DJ |
249 | /* Skip names that don't exist (shouldn't happen), or names |
250 | that are null strings (may happen). */ | |
251 | continue; | |
252 | } | |
c906108c | 253 | |
74763737 DJ |
254 | /* Skip "special" symbols, e.g. ARM mapping symbols. These are |
255 | symbols which do not correspond to objects in the symbol table, | |
256 | but have some other target-specific meaning. */ | |
257 | if (bfd_is_target_special_symbol (objfile->obfd, sym)) | |
60c5725c DJ |
258 | { |
259 | if (gdbarch_record_special_symbol_p (gdbarch)) | |
260 | gdbarch_record_special_symbol (gdbarch, objfile, sym); | |
261 | continue; | |
262 | } | |
74763737 | 263 | |
0cc7b392 | 264 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
6f610d07 | 265 | if (type == ST_DYNAMIC |
0cc7b392 DJ |
266 | && sym->section == &bfd_und_section |
267 | && (sym->flags & BSF_FUNCTION)) | |
268 | { | |
269 | struct minimal_symbol *msym; | |
02c75f72 UW |
270 | bfd *abfd = objfile->obfd; |
271 | asection *sect; | |
0cc7b392 DJ |
272 | |
273 | /* Symbol is a reference to a function defined in | |
274 | a shared library. | |
275 | If its value is non zero then it is usually the address | |
276 | of the corresponding entry in the procedure linkage table, | |
277 | plus the desired section offset. | |
278 | If its value is zero then the dynamic linker has to resolve | |
279 | the symbol. We are unable to find any meaningful address | |
280 | for this symbol in the executable file, so we skip it. */ | |
281 | symaddr = sym->value; | |
282 | if (symaddr == 0) | |
283 | continue; | |
02c75f72 UW |
284 | |
285 | /* sym->section is the undefined section. However, we want to | |
286 | record the section where the PLT stub resides with the | |
287 | minimal symbol. Search the section table for the one that | |
288 | covers the stub's address. */ | |
289 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
290 | { | |
291 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
292 | continue; | |
293 | ||
294 | if (symaddr >= bfd_get_section_vma (abfd, sect) | |
295 | && symaddr < bfd_get_section_vma (abfd, sect) | |
296 | + bfd_get_section_size (sect)) | |
297 | break; | |
298 | } | |
299 | if (!sect) | |
300 | continue; | |
301 | ||
302 | symaddr += ANOFFSET (objfile->section_offsets, sect->index); | |
303 | ||
0cc7b392 | 304 | msym = record_minimal_symbol |
04a679b8 TT |
305 | (sym->name, strlen (sym->name), copy_names, |
306 | symaddr, mst_solib_trampoline, sect, objfile); | |
0cc7b392 DJ |
307 | if (msym != NULL) |
308 | msym->filename = filesymname; | |
0cc7b392 DJ |
309 | continue; |
310 | } | |
c906108c | 311 | |
0cc7b392 DJ |
312 | /* If it is a nonstripped executable, do not enter dynamic |
313 | symbols, as the dynamic symbol table is usually a subset | |
314 | of the main symbol table. */ | |
6f610d07 | 315 | if (type == ST_DYNAMIC && !stripped) |
0cc7b392 DJ |
316 | continue; |
317 | if (sym->flags & BSF_FILE) | |
318 | { | |
319 | /* STT_FILE debugging symbol that helps stabs-in-elf debugging. | |
320 | Chain any old one onto the objfile; remember new sym. */ | |
321 | if (sectinfo != NULL) | |
c906108c | 322 | { |
0cc7b392 DJ |
323 | sectinfo->next = dbx->stab_section_info; |
324 | dbx->stab_section_info = sectinfo; | |
325 | sectinfo = NULL; | |
326 | } | |
327 | filesym = sym; | |
0cc7b392 DJ |
328 | filesymname = |
329 | obsavestring ((char *) filesym->name, strlen (filesym->name), | |
330 | &objfile->objfile_obstack); | |
0cc7b392 DJ |
331 | } |
332 | else if (sym->flags & BSF_SECTION_SYM) | |
333 | continue; | |
334 | else if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
335 | { | |
336 | struct minimal_symbol *msym; | |
337 | ||
338 | /* Select global/local/weak symbols. Note that bfd puts abs | |
339 | symbols in their own section, so all symbols we are | |
340 | interested in will have a section. */ | |
341 | /* Bfd symbols are section relative. */ | |
342 | symaddr = sym->value + sym->section->vma; | |
45148c2e UW |
343 | /* Relocate all non-absolute and non-TLS symbols by the |
344 | section offset. */ | |
345 | if (sym->section != &bfd_abs_section | |
346 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
0cc7b392 DJ |
347 | { |
348 | symaddr += offset; | |
c906108c | 349 | } |
0cc7b392 DJ |
350 | /* For non-absolute symbols, use the type of the section |
351 | they are relative to, to intuit text/data. Bfd provides | |
352 | no way of figuring this out for absolute symbols. */ | |
353 | if (sym->section == &bfd_abs_section) | |
c906108c | 354 | { |
0cc7b392 DJ |
355 | /* This is a hack to get the minimal symbol type |
356 | right for Irix 5, which has absolute addresses | |
6f610d07 UW |
357 | with special section indices for dynamic symbols. |
358 | ||
359 | NOTE: uweigand-20071112: Synthetic symbols do not | |
360 | have an ELF-private part, so do not touch those. */ | |
4fbb74a6 | 361 | unsigned int shndx = type == ST_SYNTHETIC ? 0 : |
0cc7b392 DJ |
362 | ((elf_symbol_type *) sym)->internal_elf_sym.st_shndx; |
363 | ||
364 | switch (shndx) | |
c906108c | 365 | { |
0cc7b392 DJ |
366 | case SHN_MIPS_TEXT: |
367 | ms_type = mst_text; | |
368 | break; | |
369 | case SHN_MIPS_DATA: | |
370 | ms_type = mst_data; | |
371 | break; | |
372 | case SHN_MIPS_ACOMMON: | |
373 | ms_type = mst_bss; | |
374 | break; | |
375 | default: | |
376 | ms_type = mst_abs; | |
377 | } | |
378 | ||
379 | /* If it is an Irix dynamic symbol, skip section name | |
380 | symbols, relocate all others by section offset. */ | |
381 | if (ms_type != mst_abs) | |
382 | { | |
383 | if (sym->name[0] == '.') | |
384 | continue; | |
d4f3574e | 385 | symaddr += offset; |
c906108c | 386 | } |
0cc7b392 DJ |
387 | } |
388 | else if (sym->section->flags & SEC_CODE) | |
389 | { | |
08232497 | 390 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
c906108c | 391 | { |
0cc7b392 DJ |
392 | ms_type = mst_text; |
393 | } | |
394 | else if ((sym->name[0] == '.' && sym->name[1] == 'L') | |
395 | || ((sym->flags & BSF_LOCAL) | |
396 | && sym->name[0] == '$' | |
397 | && sym->name[1] == 'L')) | |
398 | /* Looks like a compiler-generated label. Skip | |
399 | it. The assembler should be skipping these (to | |
400 | keep executables small), but apparently with | |
401 | gcc on the (deleted) delta m88k SVR4, it loses. | |
402 | So to have us check too should be harmless (but | |
403 | I encourage people to fix this in the assembler | |
404 | instead of adding checks here). */ | |
405 | continue; | |
406 | else | |
407 | { | |
408 | ms_type = mst_file_text; | |
c906108c | 409 | } |
0cc7b392 DJ |
410 | } |
411 | else if (sym->section->flags & SEC_ALLOC) | |
412 | { | |
413 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
c906108c | 414 | { |
0cc7b392 | 415 | if (sym->section->flags & SEC_LOAD) |
c906108c | 416 | { |
0cc7b392 | 417 | ms_type = mst_data; |
c906108c | 418 | } |
c906108c SS |
419 | else |
420 | { | |
0cc7b392 | 421 | ms_type = mst_bss; |
c906108c SS |
422 | } |
423 | } | |
0cc7b392 | 424 | else if (sym->flags & BSF_LOCAL) |
c906108c | 425 | { |
0cc7b392 DJ |
426 | /* Named Local variable in a Data section. |
427 | Check its name for stabs-in-elf. */ | |
428 | int special_local_sect; | |
429 | if (strcmp ("Bbss.bss", sym->name) == 0) | |
430 | special_local_sect = SECT_OFF_BSS (objfile); | |
431 | else if (strcmp ("Ddata.data", sym->name) == 0) | |
432 | special_local_sect = SECT_OFF_DATA (objfile); | |
433 | else if (strcmp ("Drodata.rodata", sym->name) == 0) | |
434 | special_local_sect = SECT_OFF_RODATA (objfile); | |
435 | else | |
436 | special_local_sect = -1; | |
437 | if (special_local_sect >= 0) | |
c906108c | 438 | { |
0cc7b392 DJ |
439 | /* Found a special local symbol. Allocate a |
440 | sectinfo, if needed, and fill it in. */ | |
441 | if (sectinfo == NULL) | |
c906108c | 442 | { |
0cc7b392 DJ |
443 | int max_index; |
444 | size_t size; | |
445 | ||
25c2f6ab PP |
446 | max_index = SECT_OFF_BSS (objfile); |
447 | if (objfile->sect_index_data > max_index) | |
448 | max_index = objfile->sect_index_data; | |
449 | if (objfile->sect_index_rodata > max_index) | |
450 | max_index = objfile->sect_index_rodata; | |
0cc7b392 DJ |
451 | |
452 | /* max_index is the largest index we'll | |
453 | use into this array, so we must | |
454 | allocate max_index+1 elements for it. | |
455 | However, 'struct stab_section_info' | |
456 | already includes one element, so we | |
457 | need to allocate max_index aadditional | |
458 | elements. */ | |
459 | size = (sizeof (struct stab_section_info) | |
460 | + (sizeof (CORE_ADDR) | |
461 | * max_index)); | |
462 | sectinfo = (struct stab_section_info *) | |
463 | xmalloc (size); | |
464 | memset (sectinfo, 0, size); | |
465 | sectinfo->num_sections = max_index; | |
466 | if (filesym == NULL) | |
c906108c | 467 | { |
0cc7b392 DJ |
468 | complaint (&symfile_complaints, |
469 | _("elf/stab section information %s without a preceding file symbol"), | |
470 | sym->name); | |
471 | } | |
472 | else | |
473 | { | |
474 | sectinfo->filename = | |
475 | (char *) filesym->name; | |
c906108c | 476 | } |
c906108c | 477 | } |
0cc7b392 DJ |
478 | if (sectinfo->sections[special_local_sect] != 0) |
479 | complaint (&symfile_complaints, | |
480 | _("duplicated elf/stab section information for %s"), | |
481 | sectinfo->filename); | |
482 | /* BFD symbols are section relative. */ | |
483 | symaddr = sym->value + sym->section->vma; | |
484 | /* Relocate non-absolute symbols by the | |
485 | section offset. */ | |
486 | if (sym->section != &bfd_abs_section) | |
487 | symaddr += offset; | |
488 | sectinfo->sections[special_local_sect] = symaddr; | |
489 | /* The special local symbols don't go in the | |
490 | minimal symbol table, so ignore this one. */ | |
491 | continue; | |
492 | } | |
493 | /* Not a special stabs-in-elf symbol, do regular | |
494 | symbol processing. */ | |
495 | if (sym->section->flags & SEC_LOAD) | |
496 | { | |
497 | ms_type = mst_file_data; | |
c906108c SS |
498 | } |
499 | else | |
500 | { | |
0cc7b392 | 501 | ms_type = mst_file_bss; |
c906108c SS |
502 | } |
503 | } | |
504 | else | |
505 | { | |
0cc7b392 | 506 | ms_type = mst_unknown; |
c906108c | 507 | } |
0cc7b392 DJ |
508 | } |
509 | else | |
510 | { | |
511 | /* FIXME: Solaris2 shared libraries include lots of | |
512 | odd "absolute" and "undefined" symbols, that play | |
513 | hob with actions like finding what function the PC | |
514 | is in. Ignore them if they aren't text, data, or bss. */ | |
515 | /* ms_type = mst_unknown; */ | |
516 | continue; /* Skip this symbol. */ | |
517 | } | |
518 | msym = record_minimal_symbol | |
04a679b8 | 519 | (sym->name, strlen (sym->name), copy_names, symaddr, |
0cc7b392 | 520 | ms_type, sym->section, objfile); |
6f610d07 | 521 | |
0cc7b392 DJ |
522 | if (msym) |
523 | { | |
524 | /* Pass symbol size field in via BFD. FIXME!!! */ | |
6f610d07 UW |
525 | elf_symbol_type *elf_sym; |
526 | ||
527 | /* NOTE: uweigand-20071112: A synthetic symbol does not have an | |
528 | ELF-private part. However, in some cases (e.g. synthetic | |
529 | 'dot' symbols on ppc64) the udata.p entry is set to point back | |
530 | to the original ELF symbol it was derived from. Get the size | |
531 | from that symbol. */ | |
532 | if (type != ST_SYNTHETIC) | |
533 | elf_sym = (elf_symbol_type *) sym; | |
534 | else | |
535 | elf_sym = (elf_symbol_type *) sym->udata.p; | |
536 | ||
537 | if (elf_sym) | |
538 | MSYMBOL_SIZE(msym) = elf_sym->internal_elf_sym.st_size; | |
a103a963 DJ |
539 | |
540 | msym->filename = filesymname; | |
541 | gdbarch_elf_make_msymbol_special (gdbarch, sym, msym); | |
0cc7b392 | 542 | } |
2eaf8d2a DJ |
543 | |
544 | /* For @plt symbols, also record a trampoline to the | |
545 | destination symbol. The @plt symbol will be used in | |
546 | disassembly, and the trampoline will be used when we are | |
547 | trying to find the target. */ | |
548 | if (msym && ms_type == mst_text && type == ST_SYNTHETIC) | |
549 | { | |
550 | int len = strlen (sym->name); | |
551 | ||
552 | if (len > 4 && strcmp (sym->name + len - 4, "@plt") == 0) | |
553 | { | |
2eaf8d2a DJ |
554 | struct minimal_symbol *mtramp; |
555 | ||
04a679b8 TT |
556 | mtramp = record_minimal_symbol (sym->name, len - 4, 1, |
557 | symaddr, | |
2eaf8d2a DJ |
558 | mst_solib_trampoline, |
559 | sym->section, objfile); | |
560 | if (mtramp) | |
561 | { | |
562 | MSYMBOL_SIZE (mtramp) = MSYMBOL_SIZE (msym); | |
563 | mtramp->filename = filesymname; | |
564 | gdbarch_elf_make_msymbol_special (gdbarch, sym, mtramp); | |
565 | } | |
566 | } | |
567 | } | |
c906108c | 568 | } |
c906108c SS |
569 | } |
570 | } | |
571 | ||
874f5765 TG |
572 | struct build_id |
573 | { | |
574 | size_t size; | |
575 | gdb_byte data[1]; | |
576 | }; | |
577 | ||
578 | /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */ | |
579 | ||
580 | static struct build_id * | |
581 | build_id_bfd_get (bfd *abfd) | |
582 | { | |
583 | struct build_id *retval; | |
584 | ||
585 | if (!bfd_check_format (abfd, bfd_object) | |
586 | || bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
587 | || elf_tdata (abfd)->build_id == NULL) | |
588 | return NULL; | |
589 | ||
590 | retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size); | |
591 | retval->size = elf_tdata (abfd)->build_id_size; | |
592 | memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size); | |
593 | ||
594 | return retval; | |
595 | } | |
596 | ||
597 | /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */ | |
598 | ||
599 | static int | |
600 | build_id_verify (const char *filename, struct build_id *check) | |
601 | { | |
602 | bfd *abfd; | |
603 | struct build_id *found = NULL; | |
604 | int retval = 0; | |
605 | ||
606 | /* We expect to be silent on the non-existing files. */ | |
607 | abfd = bfd_open_maybe_remote (filename); | |
608 | if (abfd == NULL) | |
609 | return 0; | |
610 | ||
611 | found = build_id_bfd_get (abfd); | |
612 | ||
613 | if (found == NULL) | |
614 | warning (_("File \"%s\" has no build-id, file skipped"), filename); | |
615 | else if (found->size != check->size | |
616 | || memcmp (found->data, check->data, found->size) != 0) | |
617 | warning (_("File \"%s\" has a different build-id, file skipped"), filename); | |
618 | else | |
619 | retval = 1; | |
620 | ||
621 | if (!bfd_close (abfd)) | |
622 | warning (_("cannot close \"%s\": %s"), filename, | |
623 | bfd_errmsg (bfd_get_error ())); | |
624 | ||
625 | xfree (found); | |
626 | ||
627 | return retval; | |
628 | } | |
629 | ||
630 | static char * | |
631 | build_id_to_debug_filename (struct build_id *build_id) | |
632 | { | |
633 | char *link, *debugdir, *retval = NULL; | |
634 | ||
635 | /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */ | |
636 | link = alloca (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1 | |
637 | + 2 * build_id->size + (sizeof ".debug" - 1) + 1); | |
638 | ||
639 | /* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will | |
640 | cause "/.build-id/..." lookups. */ | |
641 | ||
642 | debugdir = debug_file_directory; | |
643 | do | |
644 | { | |
645 | char *s, *debugdir_end; | |
646 | gdb_byte *data = build_id->data; | |
647 | size_t size = build_id->size; | |
648 | ||
649 | while (*debugdir == DIRNAME_SEPARATOR) | |
650 | debugdir++; | |
651 | ||
652 | debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR); | |
653 | if (debugdir_end == NULL) | |
654 | debugdir_end = &debugdir[strlen (debugdir)]; | |
655 | ||
656 | memcpy (link, debugdir, debugdir_end - debugdir); | |
657 | s = &link[debugdir_end - debugdir]; | |
658 | s += sprintf (s, "/.build-id/"); | |
659 | if (size > 0) | |
660 | { | |
661 | size--; | |
662 | s += sprintf (s, "%02x", (unsigned) *data++); | |
663 | } | |
664 | if (size > 0) | |
665 | *s++ = '/'; | |
666 | while (size-- > 0) | |
667 | s += sprintf (s, "%02x", (unsigned) *data++); | |
668 | strcpy (s, ".debug"); | |
669 | ||
670 | /* lrealpath() is expensive even for the usually non-existent files. */ | |
671 | if (access (link, F_OK) == 0) | |
672 | retval = lrealpath (link); | |
673 | ||
674 | if (retval != NULL && !build_id_verify (retval, build_id)) | |
675 | { | |
676 | xfree (retval); | |
677 | retval = NULL; | |
678 | } | |
679 | ||
680 | if (retval != NULL) | |
681 | break; | |
682 | ||
683 | debugdir = debugdir_end; | |
684 | } | |
685 | while (*debugdir != 0); | |
686 | ||
687 | return retval; | |
688 | } | |
689 | ||
690 | static char * | |
691 | find_separate_debug_file_by_buildid (struct objfile *objfile) | |
692 | { | |
693 | asection *sect; | |
694 | char *basename, *name_copy, *debugdir; | |
695 | char *dir = NULL; | |
696 | char *debugfile = NULL; | |
697 | char *canon_name = NULL; | |
698 | bfd_size_type debuglink_size; | |
874f5765 TG |
699 | int i; |
700 | struct build_id *build_id; | |
701 | ||
702 | build_id = build_id_bfd_get (objfile->obfd); | |
703 | if (build_id != NULL) | |
704 | { | |
705 | char *build_id_name; | |
706 | ||
707 | build_id_name = build_id_to_debug_filename (build_id); | |
708 | xfree (build_id); | |
709 | /* Prevent looping on a stripped .debug file. */ | |
710 | if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0) | |
711 | { | |
712 | warning (_("\"%s\": separate debug info file has no debug info"), | |
713 | build_id_name); | |
714 | xfree (build_id_name); | |
715 | } | |
716 | else if (build_id_name != NULL) | |
717 | return build_id_name; | |
718 | } | |
719 | return NULL; | |
720 | } | |
721 | ||
c906108c SS |
722 | /* Scan and build partial symbols for a symbol file. |
723 | We have been initialized by a call to elf_symfile_init, which | |
724 | currently does nothing. | |
725 | ||
726 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
727 | in each section. We simplify it down to a single offset for all | |
728 | symbols. FIXME. | |
729 | ||
c906108c SS |
730 | This function only does the minimum work necessary for letting the |
731 | user "name" things symbolically; it does not read the entire symtab. | |
732 | Instead, it reads the external and static symbols and puts them in partial | |
733 | symbol tables. When more extensive information is requested of a | |
734 | file, the corresponding partial symbol table is mutated into a full | |
735 | fledged symbol table by going back and reading the symbols | |
736 | for real. | |
737 | ||
738 | We look for sections with specific names, to tell us what debug | |
739 | format to look for: FIXME!!! | |
740 | ||
c906108c SS |
741 | elfstab_build_psymtabs() handles STABS symbols; |
742 | mdebug_build_psymtabs() handles ECOFF debugging information. | |
743 | ||
744 | Note that ELF files have a "minimal" symbol table, which looks a lot | |
745 | like a COFF symbol table, but has only the minimal information necessary | |
746 | for linking. We process this also, and use the information to | |
747 | build gdb's minimal symbol table. This gives us some minimal debugging | |
748 | capability even for files compiled without -g. */ | |
749 | ||
750 | static void | |
f4352531 | 751 | elf_symfile_read (struct objfile *objfile, int symfile_flags) |
c906108c SS |
752 | { |
753 | bfd *abfd = objfile->obfd; | |
754 | struct elfinfo ei; | |
755 | struct cleanup *back_to; | |
756 | CORE_ADDR offset; | |
62553543 EZ |
757 | long symcount = 0, dynsymcount = 0, synthcount, storage_needed; |
758 | asymbol **symbol_table = NULL, **dyn_symbol_table = NULL; | |
759 | asymbol *synthsyms; | |
c906108c SS |
760 | |
761 | init_minimal_symbol_collection (); | |
56e290f4 | 762 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
763 | |
764 | memset ((char *) &ei, 0, sizeof (ei)); | |
765 | ||
766 | /* Allocate struct to keep track of the symfile */ | |
0a6ddd08 | 767 | objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *) |
7936743b | 768 | xmalloc (sizeof (struct dbx_symfile_info)); |
0a6ddd08 | 769 | memset ((char *) objfile->deprecated_sym_stab_info, 0, sizeof (struct dbx_symfile_info)); |
12b9c64f | 770 | make_cleanup (free_elfinfo, (void *) objfile); |
c906108c SS |
771 | |
772 | /* Process the normal ELF symbol table first. This may write some | |
0a6ddd08 | 773 | chain of info into the dbx_symfile_info in objfile->deprecated_sym_stab_info, |
c906108c SS |
774 | which can later be used by elfstab_offset_sections. */ |
775 | ||
62553543 EZ |
776 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); |
777 | if (storage_needed < 0) | |
778 | error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd), | |
779 | bfd_errmsg (bfd_get_error ())); | |
780 | ||
781 | if (storage_needed > 0) | |
782 | { | |
783 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
784 | make_cleanup (xfree, symbol_table); | |
785 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
786 | ||
787 | if (symcount < 0) | |
788 | error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd), | |
789 | bfd_errmsg (bfd_get_error ())); | |
790 | ||
04a679b8 | 791 | elf_symtab_read (objfile, ST_REGULAR, symcount, symbol_table, 0); |
62553543 | 792 | } |
c906108c SS |
793 | |
794 | /* Add the dynamic symbols. */ | |
795 | ||
62553543 EZ |
796 | storage_needed = bfd_get_dynamic_symtab_upper_bound (objfile->obfd); |
797 | ||
798 | if (storage_needed > 0) | |
799 | { | |
800 | dyn_symbol_table = (asymbol **) xmalloc (storage_needed); | |
801 | make_cleanup (xfree, dyn_symbol_table); | |
802 | dynsymcount = bfd_canonicalize_dynamic_symtab (objfile->obfd, | |
803 | dyn_symbol_table); | |
804 | ||
805 | if (dynsymcount < 0) | |
806 | error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd), | |
807 | bfd_errmsg (bfd_get_error ())); | |
808 | ||
04a679b8 | 809 | elf_symtab_read (objfile, ST_DYNAMIC, dynsymcount, dyn_symbol_table, 0); |
62553543 EZ |
810 | } |
811 | ||
812 | /* Add synthetic symbols - for instance, names for any PLT entries. */ | |
813 | ||
814 | synthcount = bfd_get_synthetic_symtab (abfd, symcount, symbol_table, | |
815 | dynsymcount, dyn_symbol_table, | |
816 | &synthsyms); | |
817 | if (synthcount > 0) | |
818 | { | |
819 | asymbol **synth_symbol_table; | |
820 | long i; | |
821 | ||
822 | make_cleanup (xfree, synthsyms); | |
823 | synth_symbol_table = xmalloc (sizeof (asymbol *) * synthcount); | |
824 | for (i = 0; i < synthcount; i++) | |
9f20e3da | 825 | synth_symbol_table[i] = synthsyms + i; |
62553543 | 826 | make_cleanup (xfree, synth_symbol_table); |
04a679b8 | 827 | elf_symtab_read (objfile, ST_SYNTHETIC, synthcount, synth_symbol_table, 1); |
62553543 | 828 | } |
c906108c | 829 | |
7134143f DJ |
830 | /* Install any minimal symbols that have been collected as the current |
831 | minimal symbols for this objfile. The debug readers below this point | |
832 | should not generate new minimal symbols; if they do it's their | |
833 | responsibility to install them. "mdebug" appears to be the only one | |
834 | which will do this. */ | |
835 | ||
836 | install_minimal_symbols (objfile); | |
837 | do_cleanups (back_to); | |
838 | ||
c906108c SS |
839 | /* Now process debugging information, which is contained in |
840 | special ELF sections. */ | |
841 | ||
c906108c | 842 | /* We first have to find them... */ |
12b9c64f | 843 | bfd_map_over_sections (abfd, elf_locate_sections, (void *) & ei); |
c906108c SS |
844 | |
845 | /* ELF debugging information is inserted into the psymtab in the | |
846 | order of least informative first - most informative last. Since | |
847 | the psymtab table is searched `most recent insertion first' this | |
848 | increases the probability that more detailed debug information | |
849 | for a section is found. | |
850 | ||
851 | For instance, an object file might contain both .mdebug (XCOFF) | |
852 | and .debug_info (DWARF2) sections then .mdebug is inserted first | |
853 | (searched last) and DWARF2 is inserted last (searched first). If | |
854 | we don't do this then the XCOFF info is found first - for code in | |
855 | an included file XCOFF info is useless. */ | |
856 | ||
857 | if (ei.mdebugsect) | |
858 | { | |
859 | const struct ecoff_debug_swap *swap; | |
860 | ||
861 | /* .mdebug section, presumably holding ECOFF debugging | |
c5aa993b | 862 | information. */ |
c906108c SS |
863 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
864 | if (swap) | |
d4f3574e | 865 | elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect); |
c906108c SS |
866 | } |
867 | if (ei.stabsect) | |
868 | { | |
869 | asection *str_sect; | |
870 | ||
871 | /* Stab sections have an associated string table that looks like | |
c5aa993b | 872 | a separate section. */ |
c906108c SS |
873 | str_sect = bfd_get_section_by_name (abfd, ".stabstr"); |
874 | ||
875 | /* FIXME should probably warn about a stab section without a stabstr. */ | |
876 | if (str_sect) | |
877 | elfstab_build_psymtabs (objfile, | |
086df311 | 878 | ei.stabsect, |
c906108c SS |
879 | str_sect->filepos, |
880 | bfd_section_size (abfd, str_sect)); | |
881 | } | |
c5edf76a | 882 | if (dwarf2_has_info (objfile)) |
c906108c SS |
883 | { |
884 | /* DWARF 2 sections */ | |
f29dff0a | 885 | dwarf2_build_psymtabs (objfile); |
c906108c | 886 | } |
c906108c | 887 | |
9cce227f TG |
888 | /* If the file has its own symbol tables it has no separate debug info. |
889 | `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS. | |
890 | `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */ | |
891 | if (!objfile_has_partial_symbols (objfile)) | |
892 | { | |
893 | char *debugfile; | |
894 | ||
895 | debugfile = find_separate_debug_file_by_buildid (objfile); | |
896 | ||
897 | if (debugfile == NULL) | |
898 | debugfile = find_separate_debug_file_by_debuglink (objfile); | |
899 | ||
900 | if (debugfile) | |
901 | { | |
902 | bfd *abfd = symfile_bfd_open (debugfile); | |
903 | symbol_file_add_separate (abfd, symfile_flags, objfile); | |
904 | xfree (debugfile); | |
905 | } | |
906 | } | |
c906108c SS |
907 | } |
908 | ||
0a6ddd08 AC |
909 | /* This cleans up the objfile's deprecated_sym_stab_info pointer, and |
910 | the chain of stab_section_info's, that might be dangling from | |
911 | it. */ | |
c906108c SS |
912 | |
913 | static void | |
12b9c64f | 914 | free_elfinfo (void *objp) |
c906108c | 915 | { |
c5aa993b | 916 | struct objfile *objfile = (struct objfile *) objp; |
0a6ddd08 | 917 | struct dbx_symfile_info *dbxinfo = objfile->deprecated_sym_stab_info; |
c906108c SS |
918 | struct stab_section_info *ssi, *nssi; |
919 | ||
920 | ssi = dbxinfo->stab_section_info; | |
921 | while (ssi) | |
922 | { | |
923 | nssi = ssi->next; | |
2dc74dc1 | 924 | xfree (ssi); |
c906108c SS |
925 | ssi = nssi; |
926 | } | |
927 | ||
928 | dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */ | |
929 | } | |
930 | ||
931 | ||
932 | /* Initialize anything that needs initializing when a completely new symbol | |
933 | file is specified (not just adding some symbols from another file, e.g. a | |
934 | shared library). | |
935 | ||
936 | We reinitialize buildsym, since we may be reading stabs from an ELF file. */ | |
937 | ||
938 | static void | |
fba45db2 | 939 | elf_new_init (struct objfile *ignore) |
c906108c SS |
940 | { |
941 | stabsread_new_init (); | |
942 | buildsym_new_init (); | |
943 | } | |
944 | ||
945 | /* Perform any local cleanups required when we are done with a particular | |
946 | objfile. I.E, we are in the process of discarding all symbol information | |
947 | for an objfile, freeing up all memory held for it, and unlinking the | |
948 | objfile struct from the global list of known objfiles. */ | |
949 | ||
950 | static void | |
fba45db2 | 951 | elf_symfile_finish (struct objfile *objfile) |
c906108c | 952 | { |
0a6ddd08 | 953 | if (objfile->deprecated_sym_stab_info != NULL) |
c906108c | 954 | { |
0a6ddd08 | 955 | xfree (objfile->deprecated_sym_stab_info); |
c906108c | 956 | } |
fe3e1990 DJ |
957 | |
958 | dwarf2_free_objfile (objfile); | |
c906108c SS |
959 | } |
960 | ||
961 | /* ELF specific initialization routine for reading symbols. | |
962 | ||
963 | It is passed a pointer to a struct sym_fns which contains, among other | |
964 | things, the BFD for the file whose symbols are being read, and a slot for | |
965 | a pointer to "private data" which we can fill with goodies. | |
966 | ||
967 | For now at least, we have nothing in particular to do, so this function is | |
968 | just a stub. */ | |
969 | ||
970 | static void | |
fba45db2 | 971 | elf_symfile_init (struct objfile *objfile) |
c906108c SS |
972 | { |
973 | /* ELF objects may be reordered, so set OBJF_REORDERED. If we | |
974 | find this causes a significant slowdown in gdb then we could | |
975 | set it in the debug symbol readers only when necessary. */ | |
976 | objfile->flags |= OBJF_REORDERED; | |
977 | } | |
978 | ||
979 | /* When handling an ELF file that contains Sun STABS debug info, | |
980 | some of the debug info is relative to the particular chunk of the | |
981 | section that was generated in its individual .o file. E.g. | |
982 | offsets to static variables are relative to the start of the data | |
983 | segment *for that module before linking*. This information is | |
984 | painfully squirreled away in the ELF symbol table as local symbols | |
985 | with wierd names. Go get 'em when needed. */ | |
986 | ||
987 | void | |
fba45db2 | 988 | elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst) |
c906108c SS |
989 | { |
990 | char *filename = pst->filename; | |
0a6ddd08 | 991 | struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info; |
c906108c SS |
992 | struct stab_section_info *maybe = dbx->stab_section_info; |
993 | struct stab_section_info *questionable = 0; | |
994 | int i; | |
995 | char *p; | |
996 | ||
997 | /* The ELF symbol info doesn't include path names, so strip the path | |
998 | (if any) from the psymtab filename. */ | |
999 | while (0 != (p = strchr (filename, '/'))) | |
c5aa993b | 1000 | filename = p + 1; |
c906108c SS |
1001 | |
1002 | /* FIXME: This linear search could speed up significantly | |
1003 | if it was chained in the right order to match how we search it, | |
1004 | and if we unchained when we found a match. */ | |
1005 | for (; maybe; maybe = maybe->next) | |
1006 | { | |
1007 | if (filename[0] == maybe->filename[0] | |
6314a349 | 1008 | && strcmp (filename, maybe->filename) == 0) |
c906108c SS |
1009 | { |
1010 | /* We found a match. But there might be several source files | |
1011 | (from different directories) with the same name. */ | |
1012 | if (0 == maybe->found) | |
1013 | break; | |
c5aa993b | 1014 | questionable = maybe; /* Might use it later. */ |
c906108c SS |
1015 | } |
1016 | } | |
1017 | ||
1018 | if (maybe == 0 && questionable != 0) | |
1019 | { | |
23136709 | 1020 | complaint (&symfile_complaints, |
e2e0b3e5 | 1021 | _("elf/stab section information questionable for %s"), filename); |
c906108c SS |
1022 | maybe = questionable; |
1023 | } | |
1024 | ||
1025 | if (maybe) | |
1026 | { | |
1027 | /* Found it! Allocate a new psymtab struct, and fill it in. */ | |
1028 | maybe->found++; | |
1029 | pst->section_offsets = (struct section_offsets *) | |
8b92e4d5 | 1030 | obstack_alloc (&objfile->objfile_obstack, |
a39a16c4 MM |
1031 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
1032 | for (i = 0; i < maybe->num_sections; i++) | |
a4c8257b | 1033 | (pst->section_offsets)->offsets[i] = maybe->sections[i]; |
c906108c SS |
1034 | return; |
1035 | } | |
1036 | ||
1037 | /* We were unable to find any offsets for this file. Complain. */ | |
c5aa993b | 1038 | if (dbx->stab_section_info) /* If there *is* any info, */ |
23136709 | 1039 | complaint (&symfile_complaints, |
e2e0b3e5 | 1040 | _("elf/stab section information missing for %s"), filename); |
c906108c SS |
1041 | } |
1042 | \f | |
1043 | /* Register that we are able to handle ELF object file formats. */ | |
1044 | ||
1045 | static struct sym_fns elf_sym_fns = | |
1046 | { | |
1047 | bfd_target_elf_flavour, | |
c5aa993b JM |
1048 | elf_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
1049 | elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
1050 | elf_symfile_read, /* sym_read: read a symbol file into symtab */ | |
1051 | elf_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
96baa820 | 1052 | default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ |
31d99776 DJ |
1053 | elf_symfile_segments, /* sym_segments: Get segment information from |
1054 | a file. */ | |
c295b2e5 | 1055 | NULL, /* sym_read_linetable */ |
ac8035ab | 1056 | default_symfile_relocate, /* sym_relocate: Relocate a debug section. */ |
ccefe4c4 | 1057 | &psym_functions, |
c5aa993b | 1058 | NULL /* next: pointer to next struct sym_fns */ |
c906108c SS |
1059 | }; |
1060 | ||
1061 | void | |
fba45db2 | 1062 | _initialize_elfread (void) |
c906108c SS |
1063 | { |
1064 | add_symtab_fns (&elf_sym_fns); | |
1065 | } |