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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2008-2018 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 | |
47d48711 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a80b95ba TG |
20 | |
21 | #include "defs.h" | |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "bfd.h" | |
25 | #include "symfile.h" | |
26 | #include "objfiles.h" | |
27 | #include "buildsym.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "gdbcore.h" | |
30 | #include "mach-o.h" | |
a80b95ba TG |
31 | #include "aout/stab_gnu.h" |
32 | #include "vec.h" | |
ccefe4c4 | 33 | #include "psympriv.h" |
e4c5f296 | 34 | #include "complaints.h" |
29f77997 | 35 | #include "gdb_bfd.h" |
af533a5f | 36 | #include <string> |
2cc9b304 | 37 | #include <algorithm> |
a80b95ba | 38 | |
a80b95ba | 39 | /* If non-zero displays debugging message. */ |
ccce17b0 | 40 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 41 | |
a80b95ba TG |
42 | /* Dwarf debugging information are never in the final executable. They stay |
43 | in object files and the executable contains the list of object files read | |
44 | during the link. | |
45 | Each time an oso (other source) is found in the executable, the reader | |
46 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
47 | executable. */ |
48 | ||
2cc9b304 | 49 | struct oso_el |
a80b95ba | 50 | { |
2cc9b304 TT |
51 | oso_el (asymbol **oso_sym_, asymbol **end_sym_, unsigned int nbr_syms_) |
52 | : name((*oso_sym_)->name), | |
53 | mtime((*oso_sym_)->value), | |
54 | oso_sym(oso_sym_), | |
55 | end_sym(end_sym_), | |
56 | nbr_syms(nbr_syms_) | |
57 | { | |
58 | } | |
59 | ||
e4c5f296 | 60 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
61 | const char *name; |
62 | ||
63 | /* Associated time stamp. */ | |
64 | unsigned long mtime; | |
65 | ||
e4c5f296 TG |
66 | /* Stab symbols range for this OSO. */ |
67 | asymbol **oso_sym; | |
68 | asymbol **end_sym; | |
a80b95ba | 69 | |
e4c5f296 TG |
70 | /* Number of interesting stabs in the range. */ |
71 | unsigned int nbr_syms; | |
2cc9b304 | 72 | }; |
a80b95ba | 73 | |
2d33f7b8 TG |
74 | static void |
75 | macho_new_init (struct objfile *objfile) | |
76 | { | |
77 | } | |
78 | ||
79 | static void | |
80 | macho_symfile_init (struct objfile *objfile) | |
81 | { | |
82 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
83 | } |
84 | ||
e4c5f296 TG |
85 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
86 | ||
87 | static void | |
8dddcb8f TT |
88 | macho_symtab_add_minsym (minimal_symbol_reader &reader, |
89 | struct objfile *objfile, const asymbol *sym) | |
e4c5f296 TG |
90 | { |
91 | if (sym->name == NULL || *sym->name == '\0') | |
92 | { | |
93 | /* Skip names that don't exist (shouldn't happen), or names | |
94 | that are null strings (may happen). */ | |
95 | return; | |
96 | } | |
97 | ||
98 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
99 | { | |
100 | CORE_ADDR symaddr; | |
e4c5f296 TG |
101 | enum minimal_symbol_type ms_type; |
102 | ||
e4c5f296 TG |
103 | /* Bfd symbols are section relative. */ |
104 | symaddr = sym->value + sym->section->vma; | |
105 | ||
45dfa85a | 106 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
107 | ms_type = mst_abs; |
108 | else if (sym->section->flags & SEC_CODE) | |
109 | { | |
110 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
111 | ms_type = mst_text; | |
112 | else | |
113 | ms_type = mst_file_text; | |
114 | } | |
115 | else if (sym->section->flags & SEC_ALLOC) | |
116 | { | |
117 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
118 | { | |
119 | if (sym->section->flags & SEC_LOAD) | |
120 | ms_type = mst_data; | |
121 | else | |
122 | ms_type = mst_bss; | |
123 | } | |
124 | else if (sym->flags & BSF_LOCAL) | |
125 | { | |
126 | /* Not a special stabs-in-elf symbol, do regular | |
127 | symbol processing. */ | |
128 | if (sym->section->flags & SEC_LOAD) | |
129 | ms_type = mst_file_data; | |
130 | else | |
131 | ms_type = mst_file_bss; | |
132 | } | |
133 | else | |
134 | ms_type = mst_unknown; | |
135 | } | |
136 | else | |
137 | return; /* Skip this symbol. */ | |
138 | ||
8dddcb8f TT |
139 | reader.record_with_info (sym->name, symaddr, ms_type, |
140 | gdb_bfd_section_index (objfile->obfd, | |
141 | sym->section)); | |
e4c5f296 TG |
142 | } |
143 | } | |
144 | ||
a80b95ba | 145 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 146 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 147 | |
a80b95ba | 148 | static void |
8dddcb8f TT |
149 | macho_symtab_read (minimal_symbol_reader &reader, |
150 | struct objfile *objfile, | |
8b89a20a | 151 | long number_of_symbols, asymbol **symbol_table, |
2cc9b304 | 152 | std::vector<oso_el> *oso_vector_ptr) |
a80b95ba | 153 | { |
e4c5f296 | 154 | long i; |
e4c5f296 TG |
155 | const asymbol *file_so = NULL; |
156 | asymbol **oso_file = NULL; | |
b0d32fb6 | 157 | unsigned int nbr_syms = 0; |
a80b95ba | 158 | |
e4c5f296 TG |
159 | /* Current state while reading stabs. */ |
160 | enum | |
161 | { | |
162 | /* Not within an SO part. Only non-debugging symbols should be present, | |
163 | and will be added to the minimal symbols table. */ | |
164 | S_NO_SO, | |
bb00b29d | 165 | |
e4c5f296 TG |
166 | /* First SO read. Introduce an SO section, and may be followed by a second |
167 | SO. The SO section should contain onl debugging symbols. */ | |
168 | S_FIRST_SO, | |
a80b95ba | 169 | |
e4c5f296 TG |
170 | /* Second non-null SO found, just after the first one. Means that the first |
171 | is in fact a directory name. */ | |
172 | S_SECOND_SO, | |
a80b95ba | 173 | |
e4c5f296 TG |
174 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
175 | S_DWARF_FILE, | |
3188d986 | 176 | |
e4c5f296 TG |
177 | S_STAB_FILE |
178 | } state = S_NO_SO; | |
a80b95ba | 179 | |
e4c5f296 TG |
180 | for (i = 0; i < number_of_symbols; i++) |
181 | { | |
182 | const asymbol *sym = symbol_table[i]; | |
183 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 184 | |
e4c5f296 TG |
185 | switch (state) |
186 | { | |
187 | case S_NO_SO: | |
188 | if (mach_o_sym->n_type == N_SO) | |
189 | { | |
190 | /* Start of object stab. */ | |
191 | if (sym->name == NULL || sym->name[0] == 0) | |
192 | { | |
193 | /* Unexpected empty N_SO. */ | |
194 | complaint (&symfile_complaints, | |
195 | _("Unexpected empty N_SO stab")); | |
196 | } | |
197 | else | |
198 | { | |
199 | file_so = sym; | |
e4c5f296 TG |
200 | state = S_FIRST_SO; |
201 | } | |
202 | } | |
203 | else if (sym->flags & BSF_DEBUGGING) | |
204 | { | |
13b8d0c6 TG |
205 | if (mach_o_sym->n_type == N_OPT) |
206 | { | |
207 | /* No complaint for OPT. */ | |
208 | break; | |
209 | } | |
210 | ||
e4c5f296 TG |
211 | /* Debugging symbols are not expected here. */ |
212 | complaint (&symfile_complaints, | |
13b8d0c6 | 213 | _("%s: Unexpected debug stab outside SO markers"), |
4262abfb | 214 | objfile_name (objfile)); |
e4c5f296 TG |
215 | } |
216 | else | |
217 | { | |
218 | /* Non-debugging symbols go to the minimal symbol table. */ | |
8dddcb8f | 219 | macho_symtab_add_minsym (reader, objfile, sym); |
e4c5f296 TG |
220 | } |
221 | break; | |
a80b95ba | 222 | |
e4c5f296 TG |
223 | case S_FIRST_SO: |
224 | case S_SECOND_SO: | |
225 | if (mach_o_sym->n_type == N_SO) | |
226 | { | |
227 | if (sym->name == NULL || sym->name[0] == 0) | |
228 | { | |
229 | /* Unexpected empty N_SO. */ | |
230 | complaint (&symfile_complaints, _("Empty SO section")); | |
231 | state = S_NO_SO; | |
232 | } | |
233 | else if (state == S_FIRST_SO) | |
234 | { | |
235 | /* Second SO stab for the file name. */ | |
e4c5f296 TG |
236 | file_so = sym; |
237 | state = S_SECOND_SO; | |
238 | } | |
239 | else | |
240 | complaint (&symfile_complaints, _("Three SO in a raw")); | |
241 | } | |
242 | else if (mach_o_sym->n_type == N_OSO) | |
243 | { | |
244 | if (sym->name == NULL || sym->name[0] == 0) | |
245 | { | |
246 | /* Empty OSO. Means that this file was compiled with | |
247 | stabs. */ | |
248 | state = S_STAB_FILE; | |
249 | warning (_("stabs debugging not supported for %s"), | |
250 | file_so->name); | |
251 | } | |
252 | else | |
253 | { | |
254 | /* Non-empty OSO for a Dwarf file. */ | |
255 | oso_file = symbol_table + i; | |
256 | nbr_syms = 0; | |
257 | state = S_DWARF_FILE; | |
258 | } | |
259 | } | |
260 | else | |
261 | complaint (&symfile_complaints, | |
262 | _("Unexpected stab after SO")); | |
263 | break; | |
a80b95ba | 264 | |
e4c5f296 TG |
265 | case S_STAB_FILE: |
266 | case S_DWARF_FILE: | |
267 | if (mach_o_sym->n_type == N_SO) | |
268 | { | |
269 | if (sym->name == NULL || sym->name[0] == 0) | |
270 | { | |
271 | /* End of file. */ | |
272 | if (state == S_DWARF_FILE) | |
2cc9b304 TT |
273 | oso_vector_ptr->emplace_back (oso_file, symbol_table + i, |
274 | nbr_syms); | |
e4c5f296 TG |
275 | state = S_NO_SO; |
276 | } | |
277 | else | |
278 | { | |
279 | complaint (&symfile_complaints, _("Missing nul SO")); | |
280 | file_so = sym; | |
e4c5f296 TG |
281 | state = S_FIRST_SO; |
282 | } | |
283 | } | |
284 | else if (sym->flags & BSF_DEBUGGING) | |
285 | { | |
286 | if (state == S_STAB_FILE) | |
287 | { | |
288 | /* FIXME: to be implemented. */ | |
289 | } | |
290 | else | |
291 | { | |
292 | switch (mach_o_sym->n_type) | |
293 | { | |
294 | case N_FUN: | |
295 | if (sym->name == NULL || sym->name[0] == 0) | |
296 | break; | |
297 | /* Fall through. */ | |
298 | case N_STSYM: | |
299 | /* Interesting symbol. */ | |
300 | nbr_syms++; | |
301 | break; | |
302 | case N_ENSYM: | |
303 | case N_BNSYM: | |
304 | case N_GSYM: | |
305 | break; | |
306 | default: | |
307 | complaint (&symfile_complaints, | |
308 | _("unhandled stab for dwarf OSO file")); | |
309 | break; | |
310 | } | |
311 | } | |
312 | } | |
313 | else | |
314 | complaint (&symfile_complaints, | |
315 | _("non-debugging symbol within SO")); | |
316 | break; | |
317 | } | |
a80b95ba TG |
318 | } |
319 | ||
e4c5f296 TG |
320 | if (state != S_NO_SO) |
321 | complaint (&symfile_complaints, _("missing nul SO")); | |
a80b95ba TG |
322 | } |
323 | ||
324 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
325 | returns the length of the archive name. | |
326 | Returns -1 otherwise. */ | |
f192ea96 | 327 | |
a80b95ba TG |
328 | static int |
329 | get_archive_prefix_len (const char *name) | |
330 | { | |
2e7bf1d7 | 331 | const char *lparen; |
a80b95ba TG |
332 | int name_len = strlen (name); |
333 | ||
334 | if (name_len == 0 || name[name_len - 1] != ')') | |
335 | return -1; | |
e4c5f296 | 336 | |
a80b95ba TG |
337 | lparen = strrchr (name, '('); |
338 | if (lparen == NULL || lparen == name) | |
339 | return -1; | |
340 | return lparen - name; | |
341 | } | |
342 | ||
2cc9b304 TT |
343 | /* Compare function to std::sort OSOs, so that members of a library |
344 | are gathered. */ | |
e4c5f296 | 345 | |
2cc9b304 TT |
346 | static bool |
347 | oso_el_compare_name (const oso_el &l, const oso_el &r) | |
f192ea96 | 348 | { |
2cc9b304 | 349 | return strcmp (l.name, r.name) < 0; |
f192ea96 TG |
350 | } |
351 | ||
e4c5f296 TG |
352 | /* Hash table entry structure for the stabs symbols in the main object file. |
353 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 354 | |
e4c5f296 TG |
355 | struct macho_sym_hash_entry |
356 | { | |
357 | struct bfd_hash_entry base; | |
358 | const asymbol *sym; | |
359 | }; | |
38947cca | 360 | |
e4c5f296 | 361 | /* Routine to create an entry in the hash table. */ |
38947cca | 362 | |
e4c5f296 TG |
363 | static struct bfd_hash_entry * |
364 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
365 | struct bfd_hash_table *table, | |
366 | const char *string) | |
38947cca | 367 | { |
e4c5f296 TG |
368 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
369 | ||
370 | /* Allocate the structure if it has not already been allocated by a | |
371 | subclass. */ | |
372 | if (ret == NULL) | |
373 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
374 | sizeof (* ret)); | |
375 | if (ret == NULL) | |
376 | return NULL; | |
38947cca | 377 | |
e4c5f296 TG |
378 | /* Call the allocation method of the superclass. */ |
379 | ret = (struct macho_sym_hash_entry *) | |
380 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 381 | |
e4c5f296 | 382 | if (ret) |
38947cca | 383 | { |
e4c5f296 TG |
384 | /* Initialize the local fields. */ |
385 | ret->sym = NULL; | |
386 | } | |
38947cca | 387 | |
e4c5f296 TG |
388 | return (struct bfd_hash_entry *) ret; |
389 | } | |
38947cca | 390 | |
e4c5f296 TG |
391 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
392 | to get the value of global and common symbols. */ | |
38947cca | 393 | |
e4c5f296 TG |
394 | static CORE_ADDR |
395 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
396 | { | |
397 | /* For common symbol and global symbols, use the min symtab. */ | |
3b7344d5 | 398 | struct bound_minimal_symbol msym; |
e4c5f296 TG |
399 | const char *name = sym->name; |
400 | ||
401 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
402 | ++name; | |
403 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
3b7344d5 | 404 | if (msym.minsym == NULL) |
e4c5f296 TG |
405 | { |
406 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
407 | return 0; | |
38947cca | 408 | } |
e4c5f296 | 409 | else |
77e371c0 | 410 | return BMSYMBOL_VALUE_ADDRESS (msym); |
38947cca JB |
411 | } |
412 | ||
e4c5f296 | 413 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
414 | |
415 | static void | |
192b62ce TT |
416 | macho_add_oso_symfile (oso_el *oso, const gdb_bfd_ref_ptr &abfd, |
417 | const char *name, | |
b15cc25c PA |
418 | struct objfile *main_objfile, |
419 | symfile_add_flags symfile_flags) | |
f192ea96 | 420 | { |
e4c5f296 | 421 | int storage; |
f192ea96 | 422 | int i; |
e4c5f296 TG |
423 | asymbol **symbol_table; |
424 | asymbol **symp; | |
425 | struct bfd_hash_table table; | |
426 | int nbr_sections; | |
427 | ||
428 | /* Per section flag to mark which section have been rebased. */ | |
429 | unsigned char *sections_rebased; | |
f192ea96 TG |
430 | |
431 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
432 | printf_unfiltered |
433 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 434 | |
192b62ce | 435 | if (!bfd_check_format (abfd.get (), bfd_object)) |
f192ea96 TG |
436 | { |
437 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
438 | bfd_errmsg (bfd_get_error ())); | |
f192ea96 TG |
439 | return; |
440 | } | |
441 | ||
192b62ce | 442 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd.get ())) |
e4c5f296 TG |
443 | { |
444 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
e4c5f296 TG |
445 | return; |
446 | } | |
447 | ||
448 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
449 | sizeof (struct macho_sym_hash_entry), | |
450 | oso->nbr_syms)) | |
451 | { | |
452 | warning (_("`%s': can't create hash table"), oso->name); | |
e4c5f296 TG |
453 | return; |
454 | } | |
455 | ||
192b62ce | 456 | bfd_set_cacheable (abfd.get (), 1); |
f18b4cab | 457 | |
e4c5f296 | 458 | /* Read symbols table. */ |
192b62ce | 459 | storage = bfd_get_symtab_upper_bound (abfd.get ()); |
e4c5f296 | 460 | symbol_table = (asymbol **) xmalloc (storage); |
192b62ce | 461 | bfd_canonicalize_symtab (abfd.get (), symbol_table); |
f192ea96 | 462 | |
e4c5f296 | 463 | /* Init section flags. */ |
192b62ce | 464 | nbr_sections = bfd_count_sections (abfd.get ()); |
e4c5f296 TG |
465 | sections_rebased = (unsigned char *) alloca (nbr_sections); |
466 | for (i = 0; i < nbr_sections; i++) | |
467 | sections_rebased[i] = 0; | |
f192ea96 | 468 | |
e4c5f296 TG |
469 | /* Put symbols for the OSO file in the hash table. */ |
470 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 471 | { |
e4c5f296 TG |
472 | const asymbol *sym = *symp; |
473 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 474 | |
e4c5f296 | 475 | switch (mach_o_sym->n_type) |
f18b4cab | 476 | { |
e4c5f296 TG |
477 | case N_ENSYM: |
478 | case N_BNSYM: | |
479 | case N_GSYM: | |
480 | sym = NULL; | |
481 | break; | |
482 | case N_FUN: | |
483 | if (sym->name == NULL || sym->name[0] == 0) | |
484 | sym = NULL; | |
485 | break; | |
486 | case N_STSYM: | |
487 | break; | |
488 | default: | |
489 | sym = NULL; | |
490 | break; | |
491 | } | |
492 | if (sym != NULL) | |
493 | { | |
494 | struct macho_sym_hash_entry *ent; | |
495 | ||
496 | ent = (struct macho_sym_hash_entry *) | |
497 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
498 | if (ent->sym != NULL) | |
499 | complaint (&symfile_complaints, | |
500 | _("Duplicated symbol %s in symbol table"), sym->name); | |
501 | else | |
f18b4cab | 502 | { |
e4c5f296 TG |
503 | if (mach_o_debug_level > 4) |
504 | { | |
505 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
506 | printf_unfiltered | |
507 | (_("Adding symbol %s (addr: %s)\n"), | |
508 | sym->name, paddress (arch, sym->value)); | |
509 | } | |
510 | ent->sym = sym; | |
f18b4cab | 511 | } |
f18b4cab | 512 | } |
e4c5f296 | 513 | } |
f18b4cab | 514 | |
e4c5f296 TG |
515 | /* Relocate symbols of the OSO. */ |
516 | for (i = 0; symbol_table[i]; i++) | |
517 | { | |
518 | asymbol *sym = symbol_table[i]; | |
519 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
520 | ||
521 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
522 | continue; | |
523 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
524 | && sym->value != 0) | |
f18b4cab | 525 | { |
e4c5f296 TG |
526 | /* For common symbol use the min symtab and modify the OSO |
527 | symbol table. */ | |
528 | CORE_ADDR res; | |
529 | ||
530 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
531 | if (res != 0) | |
532 | { | |
45dfa85a | 533 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
534 | sym->value = res; |
535 | } | |
f18b4cab | 536 | } |
e4c5f296 TG |
537 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
538 | { | |
539 | /* Normal symbol. */ | |
540 | asection *sec = sym->section; | |
541 | bfd_mach_o_section *msec; | |
542 | unsigned int sec_type; | |
543 | ||
544 | /* Skip buggy ones. */ | |
545 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
546 | continue; | |
547 | ||
548 | /* Only consider regular, non-debugging sections. */ | |
549 | msec = bfd_mach_o_get_mach_o_section (sec); | |
550 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
551 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
552 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
553 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
554 | { | |
555 | CORE_ADDR addr = 0; | |
556 | ||
557 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
558 | { | |
559 | /* Use the min symtab for global symbols. */ | |
560 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
561 | } | |
562 | else | |
563 | { | |
564 | struct macho_sym_hash_entry *ent; | |
565 | ||
566 | ent = (struct macho_sym_hash_entry *) | |
567 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
568 | if (ent != NULL) | |
569 | addr = bfd_asymbol_value (ent->sym); | |
570 | } | |
f18b4cab | 571 | |
e4c5f296 TG |
572 | /* Adjust the section. */ |
573 | if (addr != 0) | |
574 | { | |
575 | CORE_ADDR res = addr - sym->value; | |
576 | ||
577 | if (mach_o_debug_level > 3) | |
578 | { | |
579 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
580 | printf_unfiltered | |
581 | (_("resolve sect %s with %s (set to %s)\n"), | |
582 | sec->name, sym->name, | |
583 | paddress (arch, res)); | |
584 | } | |
192b62ce | 585 | bfd_set_section_vma (abfd.get (), sec, res); |
e4c5f296 TG |
586 | sections_rebased[sec->index] = 1; |
587 | } | |
588 | } | |
589 | else | |
590 | { | |
591 | /* Mark the section as never rebased. */ | |
592 | sections_rebased[sec->index] = 2; | |
593 | } | |
594 | } | |
f192ea96 TG |
595 | } |
596 | ||
e4c5f296 | 597 | bfd_hash_table_free (&table); |
38947cca | 598 | |
bdfed3bc TG |
599 | /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
600 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ | |
e4c5f296 | 601 | symbol_file_add_from_bfd |
192b62ce TT |
602 | (abfd.get (), name, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), |
603 | NULL, | |
bdfed3bc | 604 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
605 | | OBJF_READNOW | OBJF_USERLOADED), |
606 | main_objfile); | |
f192ea96 TG |
607 | } |
608 | ||
8b89a20a JB |
609 | /* Read symbols from the vector of oso files. |
610 | ||
611 | Note that this function sorts OSO_VECTOR_PTR. */ | |
f192ea96 | 612 | |
a80b95ba | 613 | static void |
2cc9b304 | 614 | macho_symfile_read_all_oso (std::vector<oso_el> *oso_vector_ptr, |
8b89a20a | 615 | struct objfile *main_objfile, |
b15cc25c | 616 | symfile_add_flags symfile_flags) |
a80b95ba TG |
617 | { |
618 | int ix; | |
a80b95ba | 619 | oso_el *oso; |
a80b95ba | 620 | |
f192ea96 | 621 | /* Sort oso by name so that files from libraries are gathered. */ |
2cc9b304 TT |
622 | std::sort (oso_vector_ptr->begin (), oso_vector_ptr->end (), |
623 | oso_el_compare_name); | |
a80b95ba | 624 | |
2cc9b304 | 625 | for (ix = 0; ix < oso_vector_ptr->size (); ++ix) |
a80b95ba | 626 | { |
a80b95ba | 627 | int pfx_len; |
e4c5f296 | 628 | |
2cc9b304 TT |
629 | oso = &(*oso_vector_ptr)[ix]; |
630 | ||
a80b95ba TG |
631 | /* Check if this is a library name. */ |
632 | pfx_len = get_archive_prefix_len (oso->name); | |
633 | if (pfx_len > 0) | |
634 | { | |
f192ea96 TG |
635 | int last_ix; |
636 | oso_el *oso2; | |
637 | int ix2; | |
a80b95ba | 638 | |
af533a5f | 639 | std::string archive_name (oso->name, pfx_len); |
a4453b7e | 640 | |
f192ea96 | 641 | /* Compute number of oso for this archive. */ |
2cc9b304 | 642 | for (last_ix = ix; last_ix < oso_vector_ptr->size (); last_ix++) |
f192ea96 | 643 | { |
2cc9b304 | 644 | oso2 = &(*oso_vector_ptr)[last_ix]; |
af533a5f | 645 | if (strncmp (oso2->name, archive_name.c_str (), pfx_len) != 0) |
f192ea96 TG |
646 | break; |
647 | } | |
e4c5f296 | 648 | |
a80b95ba | 649 | /* Open the archive and check the format. */ |
192b62ce TT |
650 | gdb_bfd_ref_ptr archive_bfd (gdb_bfd_open (archive_name.c_str (), |
651 | gnutarget, -1)); | |
a80b95ba TG |
652 | if (archive_bfd == NULL) |
653 | { | |
654 | warning (_("Could not open OSO archive file \"%s\""), | |
af533a5f | 655 | archive_name.c_str ()); |
f192ea96 | 656 | ix = last_ix; |
a80b95ba TG |
657 | continue; |
658 | } | |
192b62ce | 659 | if (!bfd_check_format (archive_bfd.get (), bfd_archive)) |
a80b95ba TG |
660 | { |
661 | warning (_("OSO archive file \"%s\" not an archive."), | |
af533a5f | 662 | archive_name.c_str ()); |
f192ea96 | 663 | ix = last_ix; |
a80b95ba TG |
664 | continue; |
665 | } | |
a4453b7e | 666 | |
192b62ce TT |
667 | gdb_bfd_ref_ptr member_bfd |
668 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
e4c5f296 | 669 | |
a80b95ba TG |
670 | if (member_bfd == NULL) |
671 | { | |
672 | warning (_("Could not read archive members out of " | |
af533a5f | 673 | "OSO archive \"%s\""), archive_name.c_str ()); |
f192ea96 | 674 | ix = last_ix; |
a80b95ba TG |
675 | continue; |
676 | } | |
f192ea96 TG |
677 | |
678 | /* Load all oso in this library. */ | |
a80b95ba TG |
679 | while (member_bfd != NULL) |
680 | { | |
a80b95ba | 681 | const char *member_name = member_bfd->filename; |
f192ea96 TG |
682 | int member_len = strlen (member_name); |
683 | ||
ab7e10a0 | 684 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
685 | for (ix2 = ix; ix2 < last_ix; ix2++) |
686 | { | |
2cc9b304 | 687 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
688 | |
689 | if (oso2->name | |
690 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
691 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
692 | member_len)) | |
693 | { | |
bdfed3bc | 694 | macho_add_oso_symfile (oso2, member_bfd, |
24ba069a | 695 | bfd_get_filename (member_bfd), |
bdfed3bc | 696 | main_objfile, symfile_flags); |
f192ea96 TG |
697 | oso2->name = NULL; |
698 | break; | |
699 | } | |
700 | } | |
701 | ||
192b62ce TT |
702 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
703 | member_bfd.get ()); | |
a80b95ba | 704 | } |
f192ea96 TG |
705 | for (ix2 = ix; ix2 < last_ix; ix2++) |
706 | { | |
2cc9b304 | 707 | oso_el *oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
708 | |
709 | if (oso2->name != NULL) | |
710 | warning (_("Could not find specified archive member " | |
711 | "for OSO name \"%s\""), oso->name); | |
712 | } | |
713 | ix = last_ix; | |
a80b95ba TG |
714 | } |
715 | else | |
716 | { | |
192b62ce TT |
717 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (oso->name, gnutarget, -1)); |
718 | if (abfd == NULL) | |
f192ea96 TG |
719 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
720 | bfd_errmsg (bfd_get_error ())); | |
721 | else | |
24ba069a JK |
722 | macho_add_oso_symfile (oso, abfd, oso->name, main_objfile, |
723 | symfile_flags); | |
f192ea96 TG |
724 | |
725 | ix++; | |
726 | } | |
727 | } | |
a80b95ba TG |
728 | } |
729 | ||
730 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
731 | This is a separate file created by dsymutil(1) and is similar to debug | |
732 | link feature on ELF. | |
733 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
734 | executable name and the executable base name to get the DSYM file name. */ | |
735 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
736 | ||
24ba069a | 737 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it |
b577b6af | 738 | and return *FILENAMEP with its original filename. |
24ba069a JK |
739 | Return NULL if no valid dsym file is found (FILENAMEP is not used in |
740 | such case). */ | |
f192ea96 | 741 | |
192b62ce | 742 | static gdb_bfd_ref_ptr |
b577b6af | 743 | macho_check_dsym (struct objfile *objfile, std::string *filenamep) |
a80b95ba | 744 | { |
4262abfb | 745 | size_t name_len = strlen (objfile_name (objfile)); |
a80b95ba | 746 | size_t dsym_len = strlen (DSYM_SUFFIX); |
4262abfb | 747 | const char *base_name = lbasename (objfile_name (objfile)); |
a80b95ba | 748 | size_t base_len = strlen (base_name); |
224c3ddb | 749 | char *dsym_filename = (char *) alloca (name_len + dsym_len + base_len + 1); |
65ccb109 TG |
750 | bfd_mach_o_load_command *main_uuid; |
751 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba | 752 | |
4262abfb | 753 | strcpy (dsym_filename, objfile_name (objfile)); |
a80b95ba TG |
754 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
755 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
756 | ||
757 | if (access (dsym_filename, R_OK) != 0) | |
758 | return NULL; | |
759 | ||
65ccb109 TG |
760 | if (bfd_mach_o_lookup_command (objfile->obfd, |
761 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba | 762 | { |
4262abfb | 763 | warning (_("can't find UUID in %s"), objfile_name (objfile)); |
a80b95ba TG |
764 | return NULL; |
765 | } | |
192b62ce | 766 | gdb_bfd_ref_ptr dsym_bfd (gdb_bfd_openr (dsym_filename, gnutarget)); |
a80b95ba TG |
767 | if (dsym_bfd == NULL) |
768 | { | |
769 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
770 | return NULL; |
771 | } | |
772 | ||
192b62ce | 773 | if (!bfd_check_format (dsym_bfd.get (), bfd_object)) |
a80b95ba | 774 | { |
a80b95ba | 775 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
776 | return NULL; |
777 | } | |
778 | ||
192b62ce | 779 | if (bfd_mach_o_lookup_command (dsym_bfd.get (), |
65ccb109 | 780 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
a80b95ba TG |
781 | { |
782 | warning (_("can't find UUID in %s"), dsym_filename); | |
a80b95ba TG |
783 | return NULL; |
784 | } | |
65ccb109 TG |
785 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
786 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba | 787 | { |
4262abfb JK |
788 | warning (_("dsym file UUID doesn't match the one in %s"), |
789 | objfile_name (objfile)); | |
a80b95ba TG |
790 | return NULL; |
791 | } | |
b577b6af | 792 | *filenamep = std::string (dsym_filename); |
a80b95ba | 793 | return dsym_bfd; |
a80b95ba TG |
794 | } |
795 | ||
796 | static void | |
b15cc25c | 797 | macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
a80b95ba TG |
798 | { |
799 | bfd *abfd = objfile->obfd; | |
a80b95ba | 800 | long storage_needed; |
2cc9b304 | 801 | std::vector<oso_el> oso_vector; |
a80b95ba | 802 | |
a80b95ba TG |
803 | /* Get symbols from the symbol table only if the file is an executable. |
804 | The symbol table of object files is not relocated and is expected to | |
805 | be in the executable. */ | |
cf1061c0 | 806 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba | 807 | { |
b577b6af | 808 | std::string dsym_filename; |
24ba069a | 809 | |
a80b95ba TG |
810 | /* Process the normal symbol table first. */ |
811 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
812 | if (storage_needed < 0) | |
813 | error (_("Can't read symbols from %s: %s"), | |
814 | bfd_get_filename (objfile->obfd), | |
815 | bfd_errmsg (bfd_get_error ())); | |
816 | ||
817 | if (storage_needed > 0) | |
818 | { | |
a80b95ba TG |
819 | long symcount; |
820 | ||
2cc9b304 TT |
821 | gdb::def_vector<asymbol *> symbol_table (storage_needed |
822 | / sizeof (asymbol *)); | |
e4c5f296 | 823 | |
d25e8719 | 824 | minimal_symbol_reader reader (objfile); |
e4c5f296 | 825 | |
2cc9b304 TT |
826 | symcount = bfd_canonicalize_symtab (objfile->obfd, |
827 | symbol_table.data ()); | |
e4c5f296 | 828 | |
a80b95ba TG |
829 | if (symcount < 0) |
830 | error (_("Can't read symbols from %s: %s"), | |
831 | bfd_get_filename (objfile->obfd), | |
832 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 833 | |
2cc9b304 | 834 | macho_symtab_read (reader, objfile, symcount, symbol_table.data (), |
8dddcb8f | 835 | &oso_vector); |
e4c5f296 | 836 | |
d25e8719 | 837 | reader.install (); |
a80b95ba | 838 | } |
a80b95ba | 839 | |
cf1061c0 TG |
840 | /* Try to read .eh_frame / .debug_frame. */ |
841 | /* First, locate these sections. We ignore the result status | |
842 | as it only checks for debug info. */ | |
251d32d9 | 843 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 844 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 845 | |
a80b95ba | 846 | /* Check for DSYM file. */ |
192b62ce | 847 | gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename)); |
a80b95ba TG |
848 | if (dsym_bfd != NULL) |
849 | { | |
6414f3fd | 850 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
851 | |
852 | if (mach_o_debug_level > 0) | |
853 | printf_unfiltered (_("dsym file found\n")); | |
854 | ||
6414f3fd TG |
855 | /* Set dsym section size. */ |
856 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
857 | asect && dsect; | |
858 | asect = asect->next, dsect = dsect->next) | |
859 | { | |
860 | if (strcmp (asect->name, dsect->name) != 0) | |
861 | break; | |
192b62ce | 862 | bfd_set_section_size (dsym_bfd.get (), dsect, |
6414f3fd TG |
863 | bfd_get_section_size (asect)); |
864 | } | |
865 | ||
2480cfa0 | 866 | /* Add the dsym file as a separate file. */ |
b577b6af | 867 | symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (), |
192b62ce | 868 | symfile_flags, objfile); |
e4c5f296 | 869 | |
cf1061c0 | 870 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 871 | return; |
a80b95ba TG |
872 | } |
873 | } | |
874 | ||
251d32d9 | 875 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
876 | { |
877 | /* DWARF 2 sections */ | |
f29dff0a | 878 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
879 | } |
880 | ||
a80b95ba | 881 | /* Then the oso. */ |
2cc9b304 | 882 | if (!oso_vector.empty ()) |
8b89a20a | 883 | macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags); |
a80b95ba TG |
884 | } |
885 | ||
f18b4cab TG |
886 | static bfd_byte * |
887 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
888 | bfd_byte *buf) | |
889 | { | |
890 | bfd *abfd = objfile->obfd; | |
891 | ||
892 | /* We're only interested in sections with relocation | |
893 | information. */ | |
894 | if ((sectp->flags & SEC_RELOC) == 0) | |
895 | return NULL; | |
896 | ||
897 | if (mach_o_debug_level > 0) | |
898 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
4262abfb | 899 | sectp->name, objfile_name (objfile)); |
f18b4cab | 900 | |
f18b4cab TG |
901 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
902 | } | |
903 | ||
a80b95ba TG |
904 | static void |
905 | macho_symfile_finish (struct objfile *objfile) | |
906 | { | |
907 | } | |
908 | ||
909 | static void | |
910 | macho_symfile_offsets (struct objfile *objfile, | |
37e136b1 | 911 | const section_addr_info &addrs) |
a80b95ba TG |
912 | { |
913 | unsigned int i; | |
a80b95ba TG |
914 | struct obj_section *osect; |
915 | ||
916 | /* Allocate section_offsets. */ | |
917 | objfile->num_sections = bfd_count_sections (objfile->obfd); | |
918 | objfile->section_offsets = (struct section_offsets *) | |
919 | obstack_alloc (&objfile->objfile_obstack, | |
920 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
921 | memset (objfile->section_offsets, 0, | |
922 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); | |
923 | ||
924 | /* This code is run when we first add the objfile with | |
925 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
926 | passed in. The place in symfile.c where the addrs are applied | |
927 | depends on the addrs having section names. But in the dyld code | |
928 | we build an anonymous array of addrs, so that code is a no-op. | |
929 | Because of that, we have to apply the addrs to the sections here. | |
930 | N.B. if an objfile slides after we've already created it, then it | |
931 | goes through objfile_relocate. */ | |
932 | ||
37e136b1 | 933 | for (i = 0; i < addrs.size (); i++) |
a80b95ba | 934 | { |
a80b95ba TG |
935 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
936 | { | |
937 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
938 | ||
37e136b1 | 939 | if (bfd_sect_name == addrs[i].name) |
a80b95ba | 940 | { |
37e136b1 | 941 | obj_section_offset (osect) = addrs[i].addr; |
a80b95ba TG |
942 | break; |
943 | } | |
944 | } | |
945 | } | |
946 | ||
947 | objfile->sect_index_text = 0; | |
948 | ||
949 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
950 | { | |
951 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
65cf3563 | 952 | int sect_index = osect - objfile->sections;; |
e4c5f296 | 953 | |
61012eef | 954 | if (startswith (bfd_sect_name, "LC_SEGMENT.")) |
cf1061c0 TG |
955 | bfd_sect_name += 11; |
956 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
957 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
958 | objfile->sect_index_text = sect_index; |
959 | } | |
960 | } | |
961 | ||
00b5771c | 962 | static const struct sym_fns macho_sym_fns = { |
3e43a32a MS |
963 | macho_new_init, /* init anything gbl to entire symtab */ |
964 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
965 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 966 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
967 | macho_symfile_finish, /* finished with file, cleanup */ |
968 | macho_symfile_offsets, /* xlate external to internal form */ | |
969 | default_symfile_segments, /* Get segment information from a file. */ | |
970 | NULL, | |
971 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 972 | NULL, /* sym_get_probes */ |
00b5771c | 973 | &psym_functions |
a80b95ba TG |
974 | }; |
975 | ||
976 | void | |
dd9aa048 | 977 | _initialize_machoread (void) |
a80b95ba | 978 | { |
c256e171 | 979 | add_symtab_fns (bfd_target_mach_o_flavour, &macho_sym_fns); |
a80b95ba | 980 | |
ccce17b0 YQ |
981 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
982 | &mach_o_debug_level, | |
983 | _("Set if printing Mach-O symbols processing."), | |
984 | _("Show if printing Mach-O symbols processing."), | |
985 | NULL, NULL, NULL, | |
986 | &setdebuglist, &showdebuglist); | |
a80b95ba | 987 | } |