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a80b95ba | 1 | /* Darwin support for GDB, the GNU debugger. |
b811d2c2 | 2 | Copyright (C) 2008-2020 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" | |
a80b95ba TG |
27 | #include "gdbcmd.h" |
28 | #include "gdbcore.h" | |
29 | #include "mach-o.h" | |
a80b95ba | 30 | #include "aout/stab_gnu.h" |
e4c5f296 | 31 | #include "complaints.h" |
29f77997 | 32 | #include "gdb_bfd.h" |
af533a5f | 33 | #include <string> |
2cc9b304 | 34 | #include <algorithm> |
a80b95ba | 35 | |
a80b95ba | 36 | /* If non-zero displays debugging message. */ |
ccce17b0 | 37 | static unsigned int mach_o_debug_level = 0; |
a80b95ba | 38 | |
a80b95ba TG |
39 | /* Dwarf debugging information are never in the final executable. They stay |
40 | in object files and the executable contains the list of object files read | |
41 | during the link. | |
42 | Each time an oso (other source) is found in the executable, the reader | |
43 | creates such a structure. They are read after the processing of the | |
025bb325 MS |
44 | executable. */ |
45 | ||
2cc9b304 | 46 | struct oso_el |
a80b95ba | 47 | { |
2cc9b304 TT |
48 | oso_el (asymbol **oso_sym_, asymbol **end_sym_, unsigned int nbr_syms_) |
49 | : name((*oso_sym_)->name), | |
50 | mtime((*oso_sym_)->value), | |
51 | oso_sym(oso_sym_), | |
52 | end_sym(end_sym_), | |
53 | nbr_syms(nbr_syms_) | |
54 | { | |
55 | } | |
56 | ||
e4c5f296 | 57 | /* Object file name. Can also be a member name. */ |
a80b95ba TG |
58 | const char *name; |
59 | ||
60 | /* Associated time stamp. */ | |
61 | unsigned long mtime; | |
62 | ||
e4c5f296 TG |
63 | /* Stab symbols range for this OSO. */ |
64 | asymbol **oso_sym; | |
65 | asymbol **end_sym; | |
a80b95ba | 66 | |
e4c5f296 TG |
67 | /* Number of interesting stabs in the range. */ |
68 | unsigned int nbr_syms; | |
2cc9b304 | 69 | }; |
a80b95ba | 70 | |
2d33f7b8 TG |
71 | static void |
72 | macho_new_init (struct objfile *objfile) | |
73 | { | |
74 | } | |
75 | ||
76 | static void | |
77 | macho_symfile_init (struct objfile *objfile) | |
78 | { | |
79 | objfile->flags |= OBJF_REORDERED; | |
2d33f7b8 TG |
80 | } |
81 | ||
e4c5f296 TG |
82 | /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
83 | ||
84 | static void | |
8dddcb8f TT |
85 | macho_symtab_add_minsym (minimal_symbol_reader &reader, |
86 | struct objfile *objfile, const asymbol *sym) | |
e4c5f296 TG |
87 | { |
88 | if (sym->name == NULL || *sym->name == '\0') | |
89 | { | |
90 | /* Skip names that don't exist (shouldn't happen), or names | |
91 | that are null strings (may happen). */ | |
92 | return; | |
93 | } | |
94 | ||
95 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) | |
96 | { | |
97 | CORE_ADDR symaddr; | |
e4c5f296 TG |
98 | enum minimal_symbol_type ms_type; |
99 | ||
e4c5f296 TG |
100 | /* Bfd symbols are section relative. */ |
101 | symaddr = sym->value + sym->section->vma; | |
102 | ||
45dfa85a | 103 | if (sym->section == bfd_abs_section_ptr) |
e4c5f296 TG |
104 | ms_type = mst_abs; |
105 | else if (sym->section->flags & SEC_CODE) | |
106 | { | |
107 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
108 | ms_type = mst_text; | |
109 | else | |
110 | ms_type = mst_file_text; | |
111 | } | |
112 | else if (sym->section->flags & SEC_ALLOC) | |
113 | { | |
114 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) | |
115 | { | |
116 | if (sym->section->flags & SEC_LOAD) | |
117 | ms_type = mst_data; | |
118 | else | |
119 | ms_type = mst_bss; | |
120 | } | |
121 | else if (sym->flags & BSF_LOCAL) | |
122 | { | |
123 | /* Not a special stabs-in-elf symbol, do regular | |
124 | symbol processing. */ | |
125 | if (sym->section->flags & SEC_LOAD) | |
126 | ms_type = mst_file_data; | |
127 | else | |
128 | ms_type = mst_file_bss; | |
129 | } | |
130 | else | |
131 | ms_type = mst_unknown; | |
132 | } | |
133 | else | |
134 | return; /* Skip this symbol. */ | |
135 | ||
8dddcb8f TT |
136 | reader.record_with_info (sym->name, symaddr, ms_type, |
137 | gdb_bfd_section_index (objfile->obfd, | |
138 | sym->section)); | |
e4c5f296 TG |
139 | } |
140 | } | |
141 | ||
a80b95ba | 142 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
e4c5f296 | 143 | NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
f192ea96 | 144 | |
a80b95ba | 145 | static void |
8dddcb8f TT |
146 | macho_symtab_read (minimal_symbol_reader &reader, |
147 | struct objfile *objfile, | |
8b89a20a | 148 | long number_of_symbols, asymbol **symbol_table, |
2cc9b304 | 149 | std::vector<oso_el> *oso_vector_ptr) |
a80b95ba | 150 | { |
e4c5f296 | 151 | long i; |
e4c5f296 TG |
152 | const asymbol *file_so = NULL; |
153 | asymbol **oso_file = NULL; | |
b0d32fb6 | 154 | unsigned int nbr_syms = 0; |
a80b95ba | 155 | |
e4c5f296 TG |
156 | /* Current state while reading stabs. */ |
157 | enum | |
158 | { | |
159 | /* Not within an SO part. Only non-debugging symbols should be present, | |
160 | and will be added to the minimal symbols table. */ | |
161 | S_NO_SO, | |
bb00b29d | 162 | |
e4c5f296 TG |
163 | /* First SO read. Introduce an SO section, and may be followed by a second |
164 | SO. The SO section should contain onl debugging symbols. */ | |
165 | S_FIRST_SO, | |
a80b95ba | 166 | |
e4c5f296 TG |
167 | /* Second non-null SO found, just after the first one. Means that the first |
168 | is in fact a directory name. */ | |
169 | S_SECOND_SO, | |
a80b95ba | 170 | |
e4c5f296 TG |
171 | /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
172 | S_DWARF_FILE, | |
3188d986 | 173 | |
e4c5f296 TG |
174 | S_STAB_FILE |
175 | } state = S_NO_SO; | |
a80b95ba | 176 | |
e4c5f296 TG |
177 | for (i = 0; i < number_of_symbols; i++) |
178 | { | |
179 | const asymbol *sym = symbol_table[i]; | |
180 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
a80b95ba | 181 | |
e4c5f296 TG |
182 | switch (state) |
183 | { | |
184 | case S_NO_SO: | |
185 | if (mach_o_sym->n_type == N_SO) | |
186 | { | |
187 | /* Start of object stab. */ | |
188 | if (sym->name == NULL || sym->name[0] == 0) | |
189 | { | |
190 | /* Unexpected empty N_SO. */ | |
b98664d3 | 191 | complaint (_("Unexpected empty N_SO stab")); |
e4c5f296 TG |
192 | } |
193 | else | |
194 | { | |
195 | file_so = sym; | |
e4c5f296 TG |
196 | state = S_FIRST_SO; |
197 | } | |
198 | } | |
199 | else if (sym->flags & BSF_DEBUGGING) | |
200 | { | |
13b8d0c6 TG |
201 | if (mach_o_sym->n_type == N_OPT) |
202 | { | |
203 | /* No complaint for OPT. */ | |
204 | break; | |
205 | } | |
206 | ||
e4c5f296 | 207 | /* Debugging symbols are not expected here. */ |
b98664d3 | 208 | complaint (_("%s: Unexpected debug stab outside SO markers"), |
4262abfb | 209 | objfile_name (objfile)); |
e4c5f296 TG |
210 | } |
211 | else | |
212 | { | |
213 | /* Non-debugging symbols go to the minimal symbol table. */ | |
8dddcb8f | 214 | macho_symtab_add_minsym (reader, objfile, sym); |
e4c5f296 TG |
215 | } |
216 | break; | |
a80b95ba | 217 | |
e4c5f296 TG |
218 | case S_FIRST_SO: |
219 | case S_SECOND_SO: | |
220 | if (mach_o_sym->n_type == N_SO) | |
221 | { | |
222 | if (sym->name == NULL || sym->name[0] == 0) | |
223 | { | |
224 | /* Unexpected empty N_SO. */ | |
b98664d3 | 225 | complaint (_("Empty SO section")); |
e4c5f296 TG |
226 | state = S_NO_SO; |
227 | } | |
228 | else if (state == S_FIRST_SO) | |
229 | { | |
230 | /* Second SO stab for the file name. */ | |
e4c5f296 TG |
231 | file_so = sym; |
232 | state = S_SECOND_SO; | |
233 | } | |
234 | else | |
b98664d3 | 235 | complaint (_("Three SO in a raw")); |
e4c5f296 TG |
236 | } |
237 | else if (mach_o_sym->n_type == N_OSO) | |
238 | { | |
239 | if (sym->name == NULL || sym->name[0] == 0) | |
240 | { | |
241 | /* Empty OSO. Means that this file was compiled with | |
242 | stabs. */ | |
243 | state = S_STAB_FILE; | |
244 | warning (_("stabs debugging not supported for %s"), | |
245 | file_so->name); | |
246 | } | |
247 | else | |
248 | { | |
249 | /* Non-empty OSO for a Dwarf file. */ | |
250 | oso_file = symbol_table + i; | |
251 | nbr_syms = 0; | |
252 | state = S_DWARF_FILE; | |
253 | } | |
254 | } | |
255 | else | |
b98664d3 | 256 | complaint (_("Unexpected stab after SO")); |
e4c5f296 | 257 | break; |
a80b95ba | 258 | |
e4c5f296 TG |
259 | case S_STAB_FILE: |
260 | case S_DWARF_FILE: | |
261 | if (mach_o_sym->n_type == N_SO) | |
262 | { | |
263 | if (sym->name == NULL || sym->name[0] == 0) | |
264 | { | |
265 | /* End of file. */ | |
266 | if (state == S_DWARF_FILE) | |
2cc9b304 TT |
267 | oso_vector_ptr->emplace_back (oso_file, symbol_table + i, |
268 | nbr_syms); | |
e4c5f296 TG |
269 | state = S_NO_SO; |
270 | } | |
271 | else | |
272 | { | |
b98664d3 | 273 | complaint (_("Missing nul SO")); |
e4c5f296 | 274 | file_so = sym; |
e4c5f296 TG |
275 | state = S_FIRST_SO; |
276 | } | |
277 | } | |
278 | else if (sym->flags & BSF_DEBUGGING) | |
279 | { | |
280 | if (state == S_STAB_FILE) | |
281 | { | |
282 | /* FIXME: to be implemented. */ | |
283 | } | |
284 | else | |
285 | { | |
286 | switch (mach_o_sym->n_type) | |
287 | { | |
288 | case N_FUN: | |
289 | if (sym->name == NULL || sym->name[0] == 0) | |
290 | break; | |
291 | /* Fall through. */ | |
292 | case N_STSYM: | |
293 | /* Interesting symbol. */ | |
294 | nbr_syms++; | |
295 | break; | |
296 | case N_ENSYM: | |
297 | case N_BNSYM: | |
298 | case N_GSYM: | |
299 | break; | |
300 | default: | |
b98664d3 | 301 | complaint (_("unhandled stab for dwarf OSO file")); |
e4c5f296 TG |
302 | break; |
303 | } | |
304 | } | |
305 | } | |
306 | else | |
b98664d3 | 307 | complaint (_("non-debugging symbol within SO")); |
e4c5f296 TG |
308 | break; |
309 | } | |
a80b95ba TG |
310 | } |
311 | ||
e4c5f296 | 312 | if (state != S_NO_SO) |
b98664d3 | 313 | complaint (_("missing nul SO")); |
a80b95ba TG |
314 | } |
315 | ||
316 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), | |
317 | returns the length of the archive name. | |
318 | Returns -1 otherwise. */ | |
f192ea96 | 319 | |
a80b95ba TG |
320 | static int |
321 | get_archive_prefix_len (const char *name) | |
322 | { | |
2e7bf1d7 | 323 | const char *lparen; |
a80b95ba TG |
324 | int name_len = strlen (name); |
325 | ||
326 | if (name_len == 0 || name[name_len - 1] != ')') | |
327 | return -1; | |
e4c5f296 | 328 | |
a80b95ba TG |
329 | lparen = strrchr (name, '('); |
330 | if (lparen == NULL || lparen == name) | |
331 | return -1; | |
332 | return lparen - name; | |
333 | } | |
334 | ||
2cc9b304 TT |
335 | /* Compare function to std::sort OSOs, so that members of a library |
336 | are gathered. */ | |
e4c5f296 | 337 | |
2cc9b304 TT |
338 | static bool |
339 | oso_el_compare_name (const oso_el &l, const oso_el &r) | |
f192ea96 | 340 | { |
2cc9b304 | 341 | return strcmp (l.name, r.name) < 0; |
f192ea96 TG |
342 | } |
343 | ||
e4c5f296 TG |
344 | /* Hash table entry structure for the stabs symbols in the main object file. |
345 | This is used to speed up lookup for symbols in the OSO. */ | |
38947cca | 346 | |
e4c5f296 TG |
347 | struct macho_sym_hash_entry |
348 | { | |
349 | struct bfd_hash_entry base; | |
350 | const asymbol *sym; | |
351 | }; | |
38947cca | 352 | |
e4c5f296 | 353 | /* Routine to create an entry in the hash table. */ |
38947cca | 354 | |
e4c5f296 TG |
355 | static struct bfd_hash_entry * |
356 | macho_sym_hash_newfunc (struct bfd_hash_entry *entry, | |
357 | struct bfd_hash_table *table, | |
358 | const char *string) | |
38947cca | 359 | { |
e4c5f296 TG |
360 | struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
361 | ||
362 | /* Allocate the structure if it has not already been allocated by a | |
363 | subclass. */ | |
364 | if (ret == NULL) | |
365 | ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, | |
366 | sizeof (* ret)); | |
367 | if (ret == NULL) | |
368 | return NULL; | |
38947cca | 369 | |
e4c5f296 TG |
370 | /* Call the allocation method of the superclass. */ |
371 | ret = (struct macho_sym_hash_entry *) | |
372 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); | |
38947cca | 373 | |
e4c5f296 | 374 | if (ret) |
38947cca | 375 | { |
e4c5f296 TG |
376 | /* Initialize the local fields. */ |
377 | ret->sym = NULL; | |
378 | } | |
38947cca | 379 | |
e4c5f296 TG |
380 | return (struct bfd_hash_entry *) ret; |
381 | } | |
38947cca | 382 | |
e4c5f296 TG |
383 | /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
384 | to get the value of global and common symbols. */ | |
38947cca | 385 | |
e4c5f296 TG |
386 | static CORE_ADDR |
387 | macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) | |
388 | { | |
389 | /* For common symbol and global symbols, use the min symtab. */ | |
3b7344d5 | 390 | struct bound_minimal_symbol msym; |
e4c5f296 TG |
391 | const char *name = sym->name; |
392 | ||
393 | if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) | |
394 | ++name; | |
395 | msym = lookup_minimal_symbol (name, NULL, main_objfile); | |
3b7344d5 | 396 | if (msym.minsym == NULL) |
e4c5f296 TG |
397 | { |
398 | warning (_("can't find symbol '%s' in minsymtab"), name); | |
399 | return 0; | |
38947cca | 400 | } |
e4c5f296 | 401 | else |
77e371c0 | 402 | return BMSYMBOL_VALUE_ADDRESS (msym); |
38947cca JB |
403 | } |
404 | ||
e4c5f296 | 405 | /* Add oso file OSO/ABFD as a symbol file. */ |
f192ea96 TG |
406 | |
407 | static void | |
192b62ce TT |
408 | macho_add_oso_symfile (oso_el *oso, const gdb_bfd_ref_ptr &abfd, |
409 | const char *name, | |
b15cc25c PA |
410 | struct objfile *main_objfile, |
411 | symfile_add_flags symfile_flags) | |
f192ea96 | 412 | { |
e4c5f296 | 413 | int storage; |
f192ea96 | 414 | int i; |
e4c5f296 TG |
415 | asymbol **symbol_table; |
416 | asymbol **symp; | |
417 | struct bfd_hash_table table; | |
418 | int nbr_sections; | |
419 | ||
420 | /* Per section flag to mark which section have been rebased. */ | |
421 | unsigned char *sections_rebased; | |
f192ea96 TG |
422 | |
423 | if (mach_o_debug_level > 0) | |
e4c5f296 TG |
424 | printf_unfiltered |
425 | (_("Loading debugging symbols from oso: %s\n"), oso->name); | |
2d33f7b8 | 426 | |
192b62ce | 427 | if (!bfd_check_format (abfd.get (), bfd_object)) |
f192ea96 TG |
428 | { |
429 | warning (_("`%s': can't read symbols: %s."), oso->name, | |
430 | bfd_errmsg (bfd_get_error ())); | |
f192ea96 TG |
431 | return; |
432 | } | |
433 | ||
192b62ce | 434 | if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd.get ())) |
e4c5f296 TG |
435 | { |
436 | warning (_("`%s': file time stamp mismatch."), oso->name); | |
e4c5f296 TG |
437 | return; |
438 | } | |
439 | ||
440 | if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, | |
441 | sizeof (struct macho_sym_hash_entry), | |
442 | oso->nbr_syms)) | |
443 | { | |
444 | warning (_("`%s': can't create hash table"), oso->name); | |
e4c5f296 TG |
445 | return; |
446 | } | |
447 | ||
192b62ce | 448 | bfd_set_cacheable (abfd.get (), 1); |
f18b4cab | 449 | |
e4c5f296 | 450 | /* Read symbols table. */ |
192b62ce | 451 | storage = bfd_get_symtab_upper_bound (abfd.get ()); |
e4c5f296 | 452 | symbol_table = (asymbol **) xmalloc (storage); |
192b62ce | 453 | bfd_canonicalize_symtab (abfd.get (), symbol_table); |
f192ea96 | 454 | |
e4c5f296 | 455 | /* Init section flags. */ |
192b62ce | 456 | nbr_sections = bfd_count_sections (abfd.get ()); |
e4c5f296 TG |
457 | sections_rebased = (unsigned char *) alloca (nbr_sections); |
458 | for (i = 0; i < nbr_sections; i++) | |
459 | sections_rebased[i] = 0; | |
f192ea96 | 460 | |
e4c5f296 TG |
461 | /* Put symbols for the OSO file in the hash table. */ |
462 | for (symp = oso->oso_sym; symp != oso->end_sym; symp++) | |
f192ea96 | 463 | { |
e4c5f296 TG |
464 | const asymbol *sym = *symp; |
465 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
f18b4cab | 466 | |
e4c5f296 | 467 | switch (mach_o_sym->n_type) |
f18b4cab | 468 | { |
e4c5f296 TG |
469 | case N_ENSYM: |
470 | case N_BNSYM: | |
471 | case N_GSYM: | |
472 | sym = NULL; | |
473 | break; | |
474 | case N_FUN: | |
475 | if (sym->name == NULL || sym->name[0] == 0) | |
476 | sym = NULL; | |
477 | break; | |
478 | case N_STSYM: | |
479 | break; | |
480 | default: | |
481 | sym = NULL; | |
482 | break; | |
483 | } | |
484 | if (sym != NULL) | |
485 | { | |
486 | struct macho_sym_hash_entry *ent; | |
487 | ||
488 | ent = (struct macho_sym_hash_entry *) | |
489 | bfd_hash_lookup (&table, sym->name, TRUE, FALSE); | |
490 | if (ent->sym != NULL) | |
b98664d3 | 491 | complaint (_("Duplicated symbol %s in symbol table"), sym->name); |
e4c5f296 | 492 | else |
f18b4cab | 493 | { |
e4c5f296 TG |
494 | if (mach_o_debug_level > 4) |
495 | { | |
496 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
497 | printf_unfiltered | |
498 | (_("Adding symbol %s (addr: %s)\n"), | |
499 | sym->name, paddress (arch, sym->value)); | |
500 | } | |
501 | ent->sym = sym; | |
f18b4cab | 502 | } |
f18b4cab | 503 | } |
e4c5f296 | 504 | } |
f18b4cab | 505 | |
e4c5f296 TG |
506 | /* Relocate symbols of the OSO. */ |
507 | for (i = 0; symbol_table[i]; i++) | |
508 | { | |
509 | asymbol *sym = symbol_table[i]; | |
510 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; | |
511 | ||
512 | if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) | |
513 | continue; | |
514 | if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF | |
515 | && sym->value != 0) | |
f18b4cab | 516 | { |
e4c5f296 TG |
517 | /* For common symbol use the min symtab and modify the OSO |
518 | symbol table. */ | |
519 | CORE_ADDR res; | |
520 | ||
521 | res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
522 | if (res != 0) | |
523 | { | |
45dfa85a | 524 | sym->section = bfd_com_section_ptr; |
e4c5f296 TG |
525 | sym->value = res; |
526 | } | |
f18b4cab | 527 | } |
e4c5f296 TG |
528 | else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
529 | { | |
530 | /* Normal symbol. */ | |
531 | asection *sec = sym->section; | |
532 | bfd_mach_o_section *msec; | |
533 | unsigned int sec_type; | |
534 | ||
535 | /* Skip buggy ones. */ | |
536 | if (sec == NULL || sections_rebased[sec->index] != 0) | |
537 | continue; | |
538 | ||
539 | /* Only consider regular, non-debugging sections. */ | |
540 | msec = bfd_mach_o_get_mach_o_section (sec); | |
541 | sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; | |
542 | if ((sec_type == BFD_MACH_O_S_REGULAR | |
543 | || sec_type == BFD_MACH_O_S_ZEROFILL) | |
544 | && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) | |
545 | { | |
546 | CORE_ADDR addr = 0; | |
547 | ||
548 | if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) | |
549 | { | |
550 | /* Use the min symtab for global symbols. */ | |
551 | addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); | |
552 | } | |
553 | else | |
554 | { | |
555 | struct macho_sym_hash_entry *ent; | |
556 | ||
557 | ent = (struct macho_sym_hash_entry *) | |
558 | bfd_hash_lookup (&table, sym->name, FALSE, FALSE); | |
559 | if (ent != NULL) | |
560 | addr = bfd_asymbol_value (ent->sym); | |
561 | } | |
f18b4cab | 562 | |
e4c5f296 TG |
563 | /* Adjust the section. */ |
564 | if (addr != 0) | |
565 | { | |
566 | CORE_ADDR res = addr - sym->value; | |
567 | ||
568 | if (mach_o_debug_level > 3) | |
569 | { | |
570 | struct gdbarch *arch = get_objfile_arch (main_objfile); | |
571 | printf_unfiltered | |
572 | (_("resolve sect %s with %s (set to %s)\n"), | |
573 | sec->name, sym->name, | |
574 | paddress (arch, res)); | |
575 | } | |
fd361982 | 576 | bfd_set_section_vma (sec, res); |
e4c5f296 TG |
577 | sections_rebased[sec->index] = 1; |
578 | } | |
579 | } | |
580 | else | |
581 | { | |
582 | /* Mark the section as never rebased. */ | |
583 | sections_rebased[sec->index] = 2; | |
584 | } | |
585 | } | |
f192ea96 TG |
586 | } |
587 | ||
e4c5f296 | 588 | bfd_hash_table_free (&table); |
38947cca | 589 | |
85102364 | 590 | /* We need to clear SYMFILE_MAINLINE to avoid interactive question |
bdfed3bc | 591 | from symfile.c:symbol_file_add_with_addrs_or_offsets. */ |
e4c5f296 | 592 | symbol_file_add_from_bfd |
192b62ce TT |
593 | (abfd.get (), name, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), |
594 | NULL, | |
bdfed3bc | 595 | main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
63524580 JK |
596 | | OBJF_READNOW | OBJF_USERLOADED), |
597 | main_objfile); | |
f192ea96 TG |
598 | } |
599 | ||
8b89a20a JB |
600 | /* Read symbols from the vector of oso files. |
601 | ||
602 | Note that this function sorts OSO_VECTOR_PTR. */ | |
f192ea96 | 603 | |
a80b95ba | 604 | static void |
2cc9b304 | 605 | macho_symfile_read_all_oso (std::vector<oso_el> *oso_vector_ptr, |
8b89a20a | 606 | struct objfile *main_objfile, |
b15cc25c | 607 | symfile_add_flags symfile_flags) |
a80b95ba TG |
608 | { |
609 | int ix; | |
a80b95ba | 610 | oso_el *oso; |
a80b95ba | 611 | |
f192ea96 | 612 | /* Sort oso by name so that files from libraries are gathered. */ |
2cc9b304 TT |
613 | std::sort (oso_vector_ptr->begin (), oso_vector_ptr->end (), |
614 | oso_el_compare_name); | |
a80b95ba | 615 | |
12a0d0f6 | 616 | for (ix = 0; ix < oso_vector_ptr->size ();) |
a80b95ba | 617 | { |
a80b95ba | 618 | int pfx_len; |
e4c5f296 | 619 | |
2cc9b304 TT |
620 | oso = &(*oso_vector_ptr)[ix]; |
621 | ||
a80b95ba TG |
622 | /* Check if this is a library name. */ |
623 | pfx_len = get_archive_prefix_len (oso->name); | |
624 | if (pfx_len > 0) | |
625 | { | |
f192ea96 TG |
626 | int last_ix; |
627 | oso_el *oso2; | |
628 | int ix2; | |
a80b95ba | 629 | |
af533a5f | 630 | std::string archive_name (oso->name, pfx_len); |
a4453b7e | 631 | |
f192ea96 | 632 | /* Compute number of oso for this archive. */ |
2cc9b304 | 633 | for (last_ix = ix; last_ix < oso_vector_ptr->size (); last_ix++) |
f192ea96 | 634 | { |
2cc9b304 | 635 | oso2 = &(*oso_vector_ptr)[last_ix]; |
af533a5f | 636 | if (strncmp (oso2->name, archive_name.c_str (), pfx_len) != 0) |
f192ea96 TG |
637 | break; |
638 | } | |
e4c5f296 | 639 | |
a80b95ba | 640 | /* Open the archive and check the format. */ |
192b62ce TT |
641 | gdb_bfd_ref_ptr archive_bfd (gdb_bfd_open (archive_name.c_str (), |
642 | gnutarget, -1)); | |
a80b95ba TG |
643 | if (archive_bfd == NULL) |
644 | { | |
645 | warning (_("Could not open OSO archive file \"%s\""), | |
af533a5f | 646 | archive_name.c_str ()); |
f192ea96 | 647 | ix = last_ix; |
a80b95ba TG |
648 | continue; |
649 | } | |
192b62ce | 650 | if (!bfd_check_format (archive_bfd.get (), bfd_archive)) |
a80b95ba TG |
651 | { |
652 | warning (_("OSO archive file \"%s\" not an archive."), | |
af533a5f | 653 | archive_name.c_str ()); |
f192ea96 | 654 | ix = last_ix; |
a80b95ba TG |
655 | continue; |
656 | } | |
a4453b7e | 657 | |
192b62ce TT |
658 | gdb_bfd_ref_ptr member_bfd |
659 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
e4c5f296 | 660 | |
a80b95ba TG |
661 | if (member_bfd == NULL) |
662 | { | |
663 | warning (_("Could not read archive members out of " | |
af533a5f | 664 | "OSO archive \"%s\""), archive_name.c_str ()); |
f192ea96 | 665 | ix = last_ix; |
a80b95ba TG |
666 | continue; |
667 | } | |
f192ea96 TG |
668 | |
669 | /* Load all oso in this library. */ | |
a80b95ba TG |
670 | while (member_bfd != NULL) |
671 | { | |
00f93c44 | 672 | const char *member_name = bfd_get_filename (member_bfd.get ()); |
f192ea96 TG |
673 | int member_len = strlen (member_name); |
674 | ||
ab7e10a0 | 675 | /* If this member is referenced, add it as a symfile. */ |
f192ea96 TG |
676 | for (ix2 = ix; ix2 < last_ix; ix2++) |
677 | { | |
2cc9b304 | 678 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
679 | |
680 | if (oso2->name | |
681 | && strlen (oso2->name) == pfx_len + member_len + 2 | |
682 | && !memcmp (member_name, oso2->name + pfx_len + 1, | |
683 | member_len)) | |
684 | { | |
bdfed3bc | 685 | macho_add_oso_symfile (oso2, member_bfd, |
00f93c44 | 686 | bfd_get_filename (member_bfd.get ()), |
bdfed3bc | 687 | main_objfile, symfile_flags); |
f192ea96 TG |
688 | oso2->name = NULL; |
689 | break; | |
690 | } | |
691 | } | |
692 | ||
192b62ce TT |
693 | member_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
694 | member_bfd.get ()); | |
a80b95ba | 695 | } |
f192ea96 TG |
696 | for (ix2 = ix; ix2 < last_ix; ix2++) |
697 | { | |
b926417a | 698 | oso2 = &(*oso_vector_ptr)[ix2]; |
f192ea96 TG |
699 | |
700 | if (oso2->name != NULL) | |
701 | warning (_("Could not find specified archive member " | |
702 | "for OSO name \"%s\""), oso->name); | |
703 | } | |
704 | ix = last_ix; | |
a80b95ba TG |
705 | } |
706 | else | |
707 | { | |
192b62ce TT |
708 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (oso->name, gnutarget, -1)); |
709 | if (abfd == NULL) | |
f192ea96 TG |
710 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
711 | bfd_errmsg (bfd_get_error ())); | |
712 | else | |
24ba069a JK |
713 | macho_add_oso_symfile (oso, abfd, oso->name, main_objfile, |
714 | symfile_flags); | |
f192ea96 TG |
715 | |
716 | ix++; | |
717 | } | |
718 | } | |
a80b95ba TG |
719 | } |
720 | ||
721 | /* DSYM (debug symbols) files contain the debug info of an executable. | |
722 | This is a separate file created by dsymutil(1) and is similar to debug | |
723 | link feature on ELF. | |
724 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the | |
725 | executable name and the executable base name to get the DSYM file name. */ | |
726 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" | |
727 | ||
24ba069a | 728 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it |
b577b6af | 729 | and return *FILENAMEP with its original filename. |
24ba069a JK |
730 | Return NULL if no valid dsym file is found (FILENAMEP is not used in |
731 | such case). */ | |
f192ea96 | 732 | |
192b62ce | 733 | static gdb_bfd_ref_ptr |
b577b6af | 734 | macho_check_dsym (struct objfile *objfile, std::string *filenamep) |
a80b95ba | 735 | { |
4262abfb | 736 | size_t name_len = strlen (objfile_name (objfile)); |
a80b95ba | 737 | size_t dsym_len = strlen (DSYM_SUFFIX); |
4262abfb | 738 | const char *base_name = lbasename (objfile_name (objfile)); |
a80b95ba | 739 | size_t base_len = strlen (base_name); |
224c3ddb | 740 | char *dsym_filename = (char *) alloca (name_len + dsym_len + base_len + 1); |
65ccb109 TG |
741 | bfd_mach_o_load_command *main_uuid; |
742 | bfd_mach_o_load_command *dsym_uuid; | |
a80b95ba | 743 | |
4262abfb | 744 | strcpy (dsym_filename, objfile_name (objfile)); |
a80b95ba TG |
745 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
746 | strcpy (dsym_filename + name_len + dsym_len, base_name); | |
747 | ||
748 | if (access (dsym_filename, R_OK) != 0) | |
749 | return NULL; | |
750 | ||
65ccb109 TG |
751 | if (bfd_mach_o_lookup_command (objfile->obfd, |
752 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) | |
a80b95ba | 753 | { |
4262abfb | 754 | warning (_("can't find UUID in %s"), objfile_name (objfile)); |
a80b95ba TG |
755 | return NULL; |
756 | } | |
192b62ce | 757 | gdb_bfd_ref_ptr dsym_bfd (gdb_bfd_openr (dsym_filename, gnutarget)); |
a80b95ba TG |
758 | if (dsym_bfd == NULL) |
759 | { | |
760 | warning (_("can't open dsym file %s"), dsym_filename); | |
a80b95ba TG |
761 | return NULL; |
762 | } | |
763 | ||
192b62ce | 764 | if (!bfd_check_format (dsym_bfd.get (), bfd_object)) |
a80b95ba | 765 | { |
a80b95ba | 766 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
a80b95ba TG |
767 | return NULL; |
768 | } | |
769 | ||
192b62ce | 770 | if (bfd_mach_o_lookup_command (dsym_bfd.get (), |
65ccb109 | 771 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
a80b95ba TG |
772 | { |
773 | warning (_("can't find UUID in %s"), dsym_filename); | |
a80b95ba TG |
774 | return NULL; |
775 | } | |
65ccb109 TG |
776 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
777 | sizeof (main_uuid->command.uuid.uuid))) | |
a80b95ba | 778 | { |
4262abfb JK |
779 | warning (_("dsym file UUID doesn't match the one in %s"), |
780 | objfile_name (objfile)); | |
a80b95ba TG |
781 | return NULL; |
782 | } | |
b577b6af | 783 | *filenamep = std::string (dsym_filename); |
a80b95ba | 784 | return dsym_bfd; |
a80b95ba TG |
785 | } |
786 | ||
787 | static void | |
b15cc25c | 788 | macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
a80b95ba TG |
789 | { |
790 | bfd *abfd = objfile->obfd; | |
a80b95ba | 791 | long storage_needed; |
2cc9b304 | 792 | std::vector<oso_el> oso_vector; |
63177289 TT |
793 | /* We have to hold on to the symbol table until the call to |
794 | macho_symfile_read_all_oso at the end of this function. */ | |
795 | gdb::def_vector<asymbol *> symbol_table; | |
a80b95ba | 796 | |
a80b95ba TG |
797 | /* Get symbols from the symbol table only if the file is an executable. |
798 | The symbol table of object files is not relocated and is expected to | |
799 | be in the executable. */ | |
cf1061c0 | 800 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
a80b95ba | 801 | { |
b577b6af | 802 | std::string dsym_filename; |
24ba069a | 803 | |
a80b95ba TG |
804 | /* Process the normal symbol table first. */ |
805 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); | |
806 | if (storage_needed < 0) | |
807 | error (_("Can't read symbols from %s: %s"), | |
808 | bfd_get_filename (objfile->obfd), | |
809 | bfd_errmsg (bfd_get_error ())); | |
810 | ||
811 | if (storage_needed > 0) | |
812 | { | |
a80b95ba TG |
813 | long symcount; |
814 | ||
63177289 | 815 | symbol_table.resize (storage_needed / sizeof (asymbol *)); |
e4c5f296 | 816 | |
d25e8719 | 817 | minimal_symbol_reader reader (objfile); |
e4c5f296 | 818 | |
2cc9b304 TT |
819 | symcount = bfd_canonicalize_symtab (objfile->obfd, |
820 | symbol_table.data ()); | |
e4c5f296 | 821 | |
a80b95ba TG |
822 | if (symcount < 0) |
823 | error (_("Can't read symbols from %s: %s"), | |
824 | bfd_get_filename (objfile->obfd), | |
825 | bfd_errmsg (bfd_get_error ())); | |
e4c5f296 | 826 | |
2cc9b304 | 827 | macho_symtab_read (reader, objfile, symcount, symbol_table.data (), |
8dddcb8f | 828 | &oso_vector); |
e4c5f296 | 829 | |
d25e8719 | 830 | reader.install (); |
a80b95ba | 831 | } |
a80b95ba | 832 | |
cf1061c0 TG |
833 | /* Try to read .eh_frame / .debug_frame. */ |
834 | /* First, locate these sections. We ignore the result status | |
835 | as it only checks for debug info. */ | |
251d32d9 | 836 | dwarf2_has_info (objfile, NULL); |
cf1061c0 | 837 | dwarf2_build_frame_info (objfile); |
e4c5f296 | 838 | |
a80b95ba | 839 | /* Check for DSYM file. */ |
192b62ce | 840 | gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename)); |
a80b95ba TG |
841 | if (dsym_bfd != NULL) |
842 | { | |
6414f3fd | 843 | struct bfd_section *asect, *dsect; |
a80b95ba TG |
844 | |
845 | if (mach_o_debug_level > 0) | |
846 | printf_unfiltered (_("dsym file found\n")); | |
847 | ||
6414f3fd TG |
848 | /* Set dsym section size. */ |
849 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; | |
850 | asect && dsect; | |
851 | asect = asect->next, dsect = dsect->next) | |
852 | { | |
853 | if (strcmp (asect->name, dsect->name) != 0) | |
854 | break; | |
fd361982 | 855 | bfd_set_section_size (dsect, bfd_section_size (asect)); |
6414f3fd TG |
856 | } |
857 | ||
2480cfa0 | 858 | /* Add the dsym file as a separate file. */ |
b577b6af | 859 | symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (), |
192b62ce | 860 | symfile_flags, objfile); |
e4c5f296 | 861 | |
cf1061c0 | 862 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
2480cfa0 | 863 | return; |
a80b95ba TG |
864 | } |
865 | } | |
866 | ||
251d32d9 | 867 | if (dwarf2_has_info (objfile, NULL)) |
a80b95ba TG |
868 | { |
869 | /* DWARF 2 sections */ | |
f29dff0a | 870 | dwarf2_build_psymtabs (objfile); |
a80b95ba TG |
871 | } |
872 | ||
a80b95ba | 873 | /* Then the oso. */ |
2cc9b304 | 874 | if (!oso_vector.empty ()) |
8b89a20a | 875 | macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags); |
a80b95ba TG |
876 | } |
877 | ||
f18b4cab TG |
878 | static bfd_byte * |
879 | macho_symfile_relocate (struct objfile *objfile, asection *sectp, | |
880 | bfd_byte *buf) | |
881 | { | |
882 | bfd *abfd = objfile->obfd; | |
883 | ||
884 | /* We're only interested in sections with relocation | |
885 | information. */ | |
886 | if ((sectp->flags & SEC_RELOC) == 0) | |
887 | return NULL; | |
888 | ||
889 | if (mach_o_debug_level > 0) | |
890 | printf_unfiltered (_("Relocate section '%s' of %s\n"), | |
4262abfb | 891 | sectp->name, objfile_name (objfile)); |
f18b4cab | 892 | |
f18b4cab TG |
893 | return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
894 | } | |
895 | ||
a80b95ba TG |
896 | static void |
897 | macho_symfile_finish (struct objfile *objfile) | |
898 | { | |
899 | } | |
900 | ||
901 | static void | |
902 | macho_symfile_offsets (struct objfile *objfile, | |
37e136b1 | 903 | const section_addr_info &addrs) |
a80b95ba TG |
904 | { |
905 | unsigned int i; | |
a80b95ba TG |
906 | struct obj_section *osect; |
907 | ||
908 | /* Allocate section_offsets. */ | |
6a053cb1 | 909 | objfile->section_offsets.assign (bfd_count_sections (objfile->obfd), 0); |
a80b95ba TG |
910 | |
911 | /* This code is run when we first add the objfile with | |
912 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are | |
913 | passed in. The place in symfile.c where the addrs are applied | |
914 | depends on the addrs having section names. But in the dyld code | |
915 | we build an anonymous array of addrs, so that code is a no-op. | |
916 | Because of that, we have to apply the addrs to the sections here. | |
917 | N.B. if an objfile slides after we've already created it, then it | |
918 | goes through objfile_relocate. */ | |
919 | ||
37e136b1 | 920 | for (i = 0; i < addrs.size (); i++) |
a80b95ba | 921 | { |
a80b95ba TG |
922 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
923 | { | |
924 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
925 | ||
37e136b1 | 926 | if (bfd_sect_name == addrs[i].name) |
a80b95ba | 927 | { |
37e136b1 | 928 | obj_section_offset (osect) = addrs[i].addr; |
a80b95ba TG |
929 | break; |
930 | } | |
931 | } | |
932 | } | |
933 | ||
934 | objfile->sect_index_text = 0; | |
935 | ||
936 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
937 | { | |
938 | const char *bfd_sect_name = osect->the_bfd_section->name; | |
65cf3563 | 939 | int sect_index = osect - objfile->sections;; |
e4c5f296 | 940 | |
61012eef | 941 | if (startswith (bfd_sect_name, "LC_SEGMENT.")) |
cf1061c0 TG |
942 | bfd_sect_name += 11; |
943 | if (strcmp (bfd_sect_name, "__TEXT") == 0 | |
944 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) | |
a80b95ba TG |
945 | objfile->sect_index_text = sect_index; |
946 | } | |
947 | } | |
948 | ||
00b5771c | 949 | static const struct sym_fns macho_sym_fns = { |
3e43a32a MS |
950 | macho_new_init, /* init anything gbl to entire symtab */ |
951 | macho_symfile_init, /* read initial info, setup for sym_read() */ | |
952 | macho_symfile_read, /* read a symbol file into symtab */ | |
b11896a5 | 953 | NULL, /* sym_read_psymbols */ |
3e43a32a MS |
954 | macho_symfile_finish, /* finished with file, cleanup */ |
955 | macho_symfile_offsets, /* xlate external to internal form */ | |
956 | default_symfile_segments, /* Get segment information from a file. */ | |
957 | NULL, | |
958 | macho_symfile_relocate, /* Relocate a debug section. */ | |
55aa24fb | 959 | NULL, /* sym_get_probes */ |
00b5771c | 960 | &psym_functions |
a80b95ba TG |
961 | }; |
962 | ||
6c265988 | 963 | void _initialize_machoread (); |
a80b95ba | 964 | void |
6c265988 | 965 | _initialize_machoread () |
a80b95ba | 966 | { |
c256e171 | 967 | add_symtab_fns (bfd_target_mach_o_flavour, &macho_sym_fns); |
a80b95ba | 968 | |
ccce17b0 YQ |
969 | add_setshow_zuinteger_cmd ("mach-o", class_obscure, |
970 | &mach_o_debug_level, | |
971 | _("Set if printing Mach-O symbols processing."), | |
972 | _("Show if printing Mach-O symbols processing."), | |
973 | NULL, NULL, NULL, | |
974 | &setdebuglist, &showdebuglist); | |
a80b95ba | 975 | } |