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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
0fb0cc75 | 2 | Copyright (C) 2008, 2009 Free Software Foundation, Inc. |
a80b95ba TG |
3 | |
4 | Contributed by AdaCore. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
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 | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "buildsym.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "gdbcore.h" | |
31 | #include "mach-o.h" | |
32 | #include "gdb_assert.h" | |
33 | #include "aout/stab_gnu.h" | |
34 | #include "vec.h" | |
35 | ||
36 | #include <string.h> | |
37 | ||
38 | /* If non-zero displays debugging message. */ | |
39 | static int mach_o_debug_level = 0; | |
40 | ||
41 | static void | |
42 | macho_new_init (struct objfile *objfile) | |
43 | { | |
44 | } | |
45 | ||
46 | static void | |
47 | macho_symfile_init (struct objfile *objfile) | |
48 | { | |
49 | objfile->flags |= OBJF_REORDERED; | |
50 | init_entry_point_info (objfile); | |
51 | } | |
52 | ||
53 | /* Dwarf debugging information are never in the final executable. They stay | |
54 | in object files and the executable contains the list of object files read | |
55 | during the link. | |
56 | Each time an oso (other source) is found in the executable, the reader | |
57 | creates such a structure. They are read after the processing of the | |
58 | executable. | |
59 | */ | |
60 | typedef struct oso_el | |
61 | { | |
62 | /* Object file name. */ | |
63 | const char *name; | |
64 | ||
65 | /* Associated time stamp. */ | |
66 | unsigned long mtime; | |
67 | ||
68 | /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ | |
69 | int num_sections; | |
70 | ||
71 | /* Each seaction of the object file is represented by a symbol and its | |
72 | offset. */ | |
73 | asymbol **symbols; | |
74 | bfd_vma *offsets; | |
75 | } | |
76 | oso_el; | |
77 | ||
78 | /* Vector of object files to be read after the executable. */ | |
79 | DEF_VEC_O (oso_el); | |
80 | static VEC (oso_el) *oso_vector; | |
81 | ||
82 | /* Add a new OSO to the vector. */ | |
83 | static void | |
84 | macho_add_oso (const asymbol *oso_sym, int nbr_sections, | |
85 | asymbol **symbols, bfd_vma *offsets) | |
86 | { | |
87 | oso_el el; | |
88 | ||
89 | el.name = oso_sym->name; | |
90 | el.mtime = oso_sym->value; | |
91 | el.num_sections = nbr_sections; | |
92 | el.symbols = symbols; | |
93 | el.offsets = offsets; | |
94 | VEC_safe_push (oso_el, oso_vector, &el); | |
95 | } | |
96 | ||
97 | /* Build the minimal symbol table from SYMBOL_TABLE of length | |
98 | NUMBER_OF_SYMBOLS for OBJFILE. | |
99 | Read OSO files at the end. */ | |
100 | static void | |
101 | macho_symtab_read (struct objfile *objfile, | |
102 | long number_of_symbols, asymbol **symbol_table) | |
103 | { | |
104 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
105 | long storage_needed; | |
a80b95ba TG |
106 | long i, j; |
107 | CORE_ADDR offset; | |
108 | enum minimal_symbol_type ms_type; | |
109 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); | |
110 | asymbol **first_symbol = NULL; | |
111 | bfd_vma *first_offset = NULL; | |
112 | const asymbol *oso_file = NULL; | |
113 | ||
114 | for (i = 0; i < number_of_symbols; i++) | |
115 | { | |
bb00b29d TG |
116 | asymbol *sym = symbol_table[i]; |
117 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
118 | ||
a80b95ba TG |
119 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
120 | ||
121 | if (sym->flags & BSF_DEBUGGING) | |
122 | { | |
a80b95ba TG |
123 | bfd_vma addr; |
124 | ||
bb00b29d | 125 | switch (mach_o_sym->n_type) |
a80b95ba TG |
126 | { |
127 | case N_SO: | |
128 | if ((sym->name == NULL || sym->name[0] == 0) | |
129 | && oso_file != NULL) | |
130 | { | |
131 | macho_add_oso (oso_file, nbr_sections, | |
132 | first_symbol, first_offset); | |
133 | first_symbol = NULL; | |
134 | first_offset = NULL; | |
135 | oso_file = NULL; | |
136 | } | |
137 | break; | |
138 | case N_FUN: | |
139 | case N_STSYM: | |
140 | if (sym->name == NULL || sym->name[0] == '\0') | |
141 | break; | |
142 | /* Fall through. */ | |
143 | case N_BNSYM: | |
144 | gdb_assert (oso_file != NULL); | |
145 | addr = sym->value | |
146 | + bfd_get_section_vma (sym->section->bfd, sym->section); | |
147 | if (addr != 0 | |
148 | && first_symbol[sym->section->index] == NULL) | |
149 | { | |
150 | first_symbol[sym->section->index] = sym; | |
151 | first_offset[sym->section->index] = addr + offset; | |
152 | } | |
153 | break; | |
154 | case N_GSYM: | |
155 | gdb_assert (oso_file != NULL); | |
156 | if (first_symbol[sym->section->index] == NULL) | |
157 | first_symbol[sym->section->index] = sym; | |
158 | break; | |
159 | case N_OSO: | |
160 | gdb_assert (oso_file == NULL); | |
161 | first_symbol = (asymbol **)xmalloc (nbr_sections | |
162 | * sizeof (asymbol *)); | |
163 | first_offset = (bfd_vma *)xmalloc (nbr_sections | |
164 | * sizeof (bfd_vma)); | |
165 | for (j = 0; j < nbr_sections; j++) | |
166 | first_symbol[j] = NULL; | |
167 | oso_file = sym; | |
168 | break; | |
169 | } | |
170 | continue; | |
171 | } | |
172 | ||
173 | if (sym->name == NULL || *sym->name == '\0') | |
174 | { | |
175 | /* Skip names that don't exist (shouldn't happen), or names | |
176 | that are null strings (may happen). */ | |
177 | continue; | |
178 | } | |
179 | ||
180 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
181 | { | |
182 | struct minimal_symbol *msym; | |
183 | CORE_ADDR symaddr; | |
184 | ||
185 | /* Bfd symbols are section relative. */ | |
186 | symaddr = sym->value + sym->section->vma; | |
187 | ||
188 | /* Select global/local/weak symbols. Note that bfd puts abs | |
189 | symbols in their own section, so all symbols we are | |
190 | interested in will have a section. */ | |
191 | /* Relocate all non-absolute and non-TLS symbols by the | |
192 | section offset. */ | |
193 | if (sym->section != &bfd_abs_section | |
194 | && !(sym->section->flags & SEC_THREAD_LOCAL)) | |
195 | symaddr += offset; | |
196 | ||
197 | if (sym->section == &bfd_abs_section) | |
198 | ms_type = mst_abs; | |
199 | else if (sym->section->flags & SEC_CODE) | |
200 | { | |
201 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
202 | ms_type = mst_text; | |
203 | else | |
204 | ms_type = mst_file_text; | |
205 | } | |
206 | else if (sym->section->flags & SEC_ALLOC) | |
207 | { | |
208 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
209 | { | |
210 | if (sym->section->flags & SEC_LOAD) | |
211 | ms_type = mst_data; | |
212 | else | |
213 | ms_type = mst_bss; | |
214 | } | |
215 | else if (sym->flags & BSF_LOCAL) | |
216 | { | |
217 | /* Not a special stabs-in-elf symbol, do regular | |
218 | symbol processing. */ | |
219 | if (sym->section->flags & SEC_LOAD) | |
220 | ms_type = mst_file_data; | |
221 | else | |
222 | ms_type = mst_file_bss; | |
223 | } | |
224 | else | |
225 | ms_type = mst_unknown; | |
226 | } | |
227 | else | |
228 | continue; /* Skip this symbol. */ | |
229 | ||
230 | gdb_assert (sym->section->index < nbr_sections); | |
231 | if (oso_file != NULL | |
232 | && first_symbol[sym->section->index] == NULL) | |
233 | { | |
234 | first_symbol[sym->section->index] = sym; | |
235 | first_offset[sym->section->index] = symaddr; | |
236 | } | |
237 | ||
238 | msym = prim_record_minimal_symbol_and_info | |
239 | (sym->name, symaddr, ms_type, sym->section->index, | |
240 | sym->section, objfile); | |
241 | } | |
242 | } | |
243 | ||
244 | if (oso_file != NULL) | |
245 | macho_add_oso (oso_file, nbr_sections, first_symbol, first_offset); | |
246 | } | |
247 | ||
248 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
249 | returns the length of the archive name. | |
250 | Returns -1 otherwise. */ | |
251 | static int | |
252 | get_archive_prefix_len (const char *name) | |
253 | { | |
254 | char *lparen; | |
255 | int name_len = strlen (name); | |
256 | ||
257 | if (name_len == 0 || name[name_len - 1] != ')') | |
258 | return -1; | |
259 | ||
260 | lparen = strrchr (name, '('); | |
261 | if (lparen == NULL || lparen == name) | |
262 | return -1; | |
263 | return lparen - name; | |
264 | } | |
265 | ||
266 | /* Read symbols from the vector of oso files. */ | |
267 | static void | |
268 | macho_oso_symfile (struct objfile *main_objfile) | |
269 | { | |
270 | int ix; | |
271 | VEC (oso_el) *vec; | |
272 | oso_el *oso; | |
273 | char leading_char; | |
274 | ||
275 | /* TODO: Sort them, group library search. */ | |
276 | ||
277 | vec = oso_vector; | |
278 | oso_vector = NULL; | |
279 | ||
280 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); | |
281 | ||
282 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) | |
283 | { | |
284 | struct section_addr_info *addrs; | |
285 | int pfx_len; | |
286 | int len; | |
287 | int i; | |
288 | oso_el el; | |
289 | ||
290 | if (mach_o_debug_level > 0) | |
291 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); | |
292 | ||
293 | /* Compute addr length. */ | |
294 | len = 0; | |
295 | for (i = 0; i < oso->num_sections; i++) | |
296 | if (oso->symbols[i] != NULL) | |
297 | len++; | |
298 | ||
299 | addrs = alloc_section_addr_info (len); | |
300 | ||
301 | len = 0; | |
302 | for (i = 0; i < oso->num_sections; i++) | |
303 | if (oso->symbols[i] != NULL) | |
304 | { | |
305 | if (oso->offsets[i]) | |
306 | addrs->other[len].addr = oso->offsets[i]; | |
307 | else | |
308 | { | |
309 | struct minimal_symbol *msym; | |
310 | const char *name = oso->symbols[i]->name; | |
311 | ||
312 | if (name[0] == leading_char) | |
313 | ++name; | |
314 | ||
315 | if (mach_o_debug_level > 3) | |
316 | printf_unfiltered (_("resolv sec %s with %s\n"), | |
317 | oso->symbols[i]->section->name, | |
318 | oso->symbols[i]->name); | |
319 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
320 | if (msym == NULL) | |
321 | { | |
322 | warning (_("can't find symbol '%s' in minsymtab"), | |
323 | oso->symbols[i]->name); | |
324 | addrs->other[len].addr = 0; | |
325 | } | |
326 | else | |
327 | addrs->other[len].addr = SYMBOL_VALUE_ADDRESS (msym); | |
328 | } | |
329 | addrs->other[len].name = (char *)oso->symbols[i]->section->name; | |
330 | len++; | |
331 | } | |
332 | ||
333 | if (mach_o_debug_level > 1) | |
334 | { | |
335 | int j; | |
336 | for (j = 0; j < addrs->num_sections; j++) | |
337 | printf_unfiltered | |
338 | (_(" %s: %s\n"), | |
339 | core_addr_to_string (addrs->other[j].addr), | |
340 | addrs->other[j].name); | |
341 | } | |
342 | ||
343 | /* Check if this is a library name. */ | |
344 | pfx_len = get_archive_prefix_len (oso->name); | |
345 | if (pfx_len > 0) | |
346 | { | |
347 | bfd *archive_bfd; | |
348 | bfd *member_bfd; | |
349 | char *archive_name = (char *) alloca (pfx_len + 1); | |
350 | int member_len; | |
351 | ||
352 | member_len = strlen (oso->name + pfx_len + 1) - 1; | |
353 | memcpy (archive_name, oso->name, pfx_len); | |
354 | archive_name[pfx_len] = '\0'; | |
355 | ||
356 | /* Open the archive and check the format. */ | |
357 | archive_bfd = bfd_openr (archive_name, gnutarget); | |
358 | if (archive_bfd == NULL) | |
359 | { | |
360 | warning (_("Could not open OSO archive file \"%s\""), | |
361 | archive_name); | |
362 | continue; | |
363 | } | |
364 | if (!bfd_check_format (archive_bfd, bfd_archive)) | |
365 | { | |
366 | warning (_("OSO archive file \"%s\" not an archive."), | |
367 | archive_name); | |
368 | bfd_close (archive_bfd); | |
369 | continue; | |
370 | } | |
371 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); | |
372 | ||
373 | if (member_bfd == NULL) | |
374 | { | |
375 | warning (_("Could not read archive members out of " | |
376 | "OSO archive \"%s\""), archive_name); | |
377 | bfd_close (archive_bfd); | |
378 | continue; | |
379 | } | |
380 | ||
381 | while (member_bfd != NULL) | |
382 | { | |
383 | bfd *prev = member_bfd; | |
384 | const char *member_name = member_bfd->filename; | |
385 | if (strlen (member_name) == member_len | |
386 | && !memcmp (member_name, oso->name + pfx_len + 1, member_len)) | |
387 | break; | |
388 | member_bfd = bfd_openr_next_archived_file | |
389 | (archive_bfd, member_bfd); | |
390 | bfd_close (prev); | |
391 | } | |
392 | if (member_bfd == NULL) | |
393 | { | |
394 | warning (_("Could not find specified archive member " | |
395 | "for OSO name \"%s\""), oso->name); | |
396 | bfd_close (archive_bfd); | |
397 | continue; | |
398 | } | |
399 | ||
400 | bfd_set_cacheable (member_bfd, 1); | |
401 | ||
402 | if (!bfd_check_format (member_bfd, bfd_object)) | |
403 | { | |
404 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
405 | bfd_errmsg (bfd_get_error ())); | |
406 | bfd_close (member_bfd); | |
407 | } | |
408 | else | |
7eedccfa | 409 | symbol_file_add_from_bfd (member_bfd, 0, addrs, 0); |
a80b95ba TG |
410 | } |
411 | else | |
412 | { | |
413 | bfd *abfd; | |
414 | ||
415 | abfd = bfd_openr (oso->name, gnutarget); | |
416 | if (!abfd) | |
417 | { | |
418 | warning (_("`%s': can't open to read symbols: %s."), oso->name, | |
419 | bfd_errmsg (bfd_get_error ())); | |
420 | continue; | |
421 | } | |
422 | bfd_set_cacheable (abfd, 1); | |
423 | ||
424 | if (!bfd_check_format (abfd, bfd_object)) | |
425 | { | |
426 | bfd_close (abfd); | |
427 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
428 | bfd_errmsg (bfd_get_error ())); | |
429 | continue; | |
430 | } | |
431 | ||
7eedccfa | 432 | symbol_file_add_from_bfd (abfd, 0, addrs, 0); |
a80b95ba TG |
433 | } |
434 | xfree (oso->symbols); | |
435 | xfree (oso->offsets); | |
436 | } | |
437 | VEC_free (oso_el, vec); | |
438 | } | |
439 | ||
440 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
441 | This is a separate file created by dsymutil(1) and is similar to debug | |
442 | link feature on ELF. | |
443 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
444 | executable name and the executable base name to get the DSYM file name. */ | |
445 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
446 | ||
447 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. | |
448 | Return NULL if no valid dsym file is found. */ | |
449 | static bfd * | |
450 | macho_check_dsym (struct objfile *objfile) | |
451 | { | |
452 | size_t name_len = strlen (objfile->name); | |
453 | size_t dsym_len = strlen (DSYM_SUFFIX); | |
454 | const char *base_name = lbasename (objfile->name); | |
455 | size_t base_len = strlen (base_name); | |
456 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); | |
457 | bfd *dsym_bfd; | |
458 | asection *sect; | |
459 | bfd_byte main_uuid[16]; | |
460 | bfd_byte dsym_uuid[16]; | |
461 | ||
462 | strcpy (dsym_filename, objfile->name); | |
463 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); | |
464 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
465 | ||
466 | if (access (dsym_filename, R_OK) != 0) | |
467 | return NULL; | |
468 | ||
469 | sect = bfd_get_section_by_name (objfile->obfd, "LC_UUID"); | |
470 | if (sect == NULL) | |
471 | { | |
472 | warning (_("can't find UUID in %s"), objfile->name); | |
473 | return NULL; | |
474 | } | |
475 | if (!bfd_get_section_contents (objfile->obfd, sect, main_uuid, | |
476 | 0, sizeof (main_uuid))) | |
477 | { | |
478 | warning (_("can't read UUID in %s"), objfile->name); | |
479 | return NULL; | |
480 | } | |
481 | ||
482 | dsym_filename = xstrdup (dsym_filename); | |
483 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); | |
484 | if (dsym_bfd == NULL) | |
485 | { | |
486 | warning (_("can't open dsym file %s"), dsym_filename); | |
487 | xfree (dsym_filename); | |
488 | return NULL; | |
489 | } | |
490 | ||
491 | if (!bfd_check_format (dsym_bfd, bfd_object)) | |
492 | { | |
493 | bfd_close (dsym_bfd); | |
494 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); | |
495 | xfree (dsym_filename); | |
496 | return NULL; | |
497 | } | |
498 | ||
499 | sect = bfd_get_section_by_name (dsym_bfd, "LC_UUID"); | |
500 | if (sect == NULL) | |
501 | { | |
502 | warning (_("can't find UUID in %s"), dsym_filename); | |
503 | bfd_close (dsym_bfd); | |
504 | xfree (dsym_filename); | |
505 | return NULL; | |
506 | } | |
507 | if (!bfd_get_section_contents (dsym_bfd, sect, dsym_uuid, | |
508 | 0, sizeof (dsym_uuid))) | |
509 | { | |
510 | warning (_("can't read UUID in %s"), dsym_filename); | |
511 | bfd_close (dsym_bfd); | |
512 | xfree (dsym_filename); | |
513 | return NULL; | |
514 | } | |
515 | if (memcmp (dsym_uuid, main_uuid, sizeof (main_uuid))) | |
516 | { | |
517 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); | |
518 | bfd_close (dsym_bfd); | |
519 | xfree (dsym_filename); | |
520 | return NULL; | |
521 | } | |
522 | return dsym_bfd; | |
523 | ||
524 | } | |
525 | ||
526 | static void | |
527 | macho_symfile_read (struct objfile *objfile, int mainline) | |
528 | { | |
529 | bfd *abfd = objfile->obfd; | |
530 | struct cleanup *back_to; | |
531 | CORE_ADDR offset; | |
532 | long storage_needed; | |
533 | bfd *dsym_bfd; | |
534 | ||
535 | init_minimal_symbol_collection (); | |
536 | back_to = make_cleanup_discard_minimal_symbols (); | |
537 | ||
538 | /* Get symbols from the symbol table only if the file is an executable. | |
539 | The symbol table of object files is not relocated and is expected to | |
540 | be in the executable. */ | |
cf1061c0 | 541 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba TG |
542 | { |
543 | /* Process the normal symbol table first. */ | |
544 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
545 | if (storage_needed < 0) | |
546 | error (_("Can't read symbols from %s: %s"), | |
547 | bfd_get_filename (objfile->obfd), | |
548 | bfd_errmsg (bfd_get_error ())); | |
549 | ||
550 | if (storage_needed > 0) | |
551 | { | |
552 | asymbol **symbol_table; | |
553 | long symcount; | |
554 | ||
555 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
556 | make_cleanup (xfree, symbol_table); | |
557 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); | |
558 | ||
559 | if (symcount < 0) | |
560 | error (_("Can't read symbols from %s: %s"), | |
561 | bfd_get_filename (objfile->obfd), | |
562 | bfd_errmsg (bfd_get_error ())); | |
563 | ||
564 | macho_symtab_read (objfile, symcount, symbol_table); | |
565 | } | |
566 | ||
567 | install_minimal_symbols (objfile); | |
568 | ||
cf1061c0 TG |
569 | /* Try to read .eh_frame / .debug_frame. */ |
570 | /* First, locate these sections. We ignore the result status | |
571 | as it only checks for debug info. */ | |
572 | dwarf2_has_info (objfile); | |
573 | dwarf2_build_frame_info (objfile); | |
574 | ||
a80b95ba TG |
575 | /* Check for DSYM file. */ |
576 | dsym_bfd = macho_check_dsym (objfile); | |
577 | if (dsym_bfd != NULL) | |
578 | { | |
579 | int ix; | |
580 | oso_el *oso; | |
581 | ||
582 | if (mach_o_debug_level > 0) | |
583 | printf_unfiltered (_("dsym file found\n")); | |
584 | ||
585 | /* Remove oso. They won't be used. */ | |
586 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) | |
587 | { | |
588 | xfree (oso->symbols); | |
589 | xfree (oso->offsets); | |
590 | } | |
591 | VEC_free (oso_el, oso_vector); | |
592 | oso_vector = NULL; | |
593 | ||
594 | /* Now recurse: read dwarf from dsym. */ | |
7eedccfa | 595 | symbol_file_add_from_bfd (dsym_bfd, 0, NULL, 0); |
a80b95ba | 596 | |
cf1061c0 | 597 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
a80b95ba TG |
598 | return; |
599 | } | |
600 | } | |
601 | ||
602 | if (dwarf2_has_info (objfile)) | |
603 | { | |
604 | /* DWARF 2 sections */ | |
605 | dwarf2_build_psymtabs (objfile, mainline); | |
606 | } | |
607 | ||
cf1061c0 TG |
608 | /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
609 | and dwarf2_build_frame_info cannot deal with unrelocated sections. */ | |
a80b95ba TG |
610 | |
611 | /* Then the oso. */ | |
612 | if (oso_vector != NULL) | |
613 | macho_oso_symfile (objfile); | |
614 | } | |
615 | ||
616 | static void | |
617 | macho_symfile_finish (struct objfile *objfile) | |
618 | { | |
619 | } | |
620 | ||
621 | static void | |
622 | macho_symfile_offsets (struct objfile *objfile, | |
623 | struct section_addr_info *addrs) | |
624 | { | |
625 | unsigned int i; | |
626 | unsigned int num_sections; | |
627 | struct obj_section *osect; | |
628 | ||
629 | /* Allocate section_offsets. */ | |
630 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
631 | objfile->section_offsets = (struct section_offsets *) | |
632 | obstack_alloc (&objfile->objfile_obstack, | |
633 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
634 | memset (objfile->section_offsets, 0, | |
635 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
636 | ||
637 | /* This code is run when we first add the objfile with | |
638 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
639 | passed in. The place in symfile.c where the addrs are applied | |
640 | depends on the addrs having section names. But in the dyld code | |
641 | we build an anonymous array of addrs, so that code is a no-op. | |
642 | Because of that, we have to apply the addrs to the sections here. | |
643 | N.B. if an objfile slides after we've already created it, then it | |
644 | goes through objfile_relocate. */ | |
645 | ||
646 | for (i = 0; i < addrs->num_sections; i++) | |
647 | { | |
648 | if (addrs->other[i].name == NULL) | |
649 | continue; | |
650 | ||
651 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
652 | { | |
653 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
654 | ||
655 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) | |
656 | { | |
657 | obj_section_offset (osect) = addrs->other[i].addr; | |
658 | break; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | objfile->sect_index_text = 0; | |
664 | ||
665 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
666 | { | |
667 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
668 | int sect_index = osect->the_bfd_section->index; | |
cf1061c0 TG |
669 | |
670 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) | |
671 | bfd_sect_name += 11; | |
672 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
673 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
674 | objfile->sect_index_text = sect_index; |
675 | } | |
676 | } | |
677 | ||
678 | static struct sym_fns macho_sym_fns = { | |
679 | bfd_target_mach_o_flavour, | |
680 | ||
681 | macho_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
682 | macho_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
683 | macho_symfile_read, /* sym_read: read a symbol file into symtab */ | |
684 | macho_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
685 | macho_symfile_offsets, /* sym_offsets: xlate external to internal form */ | |
686 | NULL /* next: pointer to next struct sym_fns */ | |
687 | }; | |
688 | ||
689 | void | |
690 | _initialize_machoread () | |
691 | { | |
692 | add_symtab_fns (&macho_sym_fns); | |
693 | ||
694 | add_setshow_zinteger_cmd ("mach-o", class_obscure, | |
695 | &mach_o_debug_level, _("\ | |
696 | Set if printing Mach-O symbols processing."), _("\ | |
697 | Show if printing Mach-O symbols processing."), NULL, | |
698 | NULL, NULL, | |
699 | &setdebuglist, &showdebuglist); | |
700 | } |