| 1 | /* Darwin support for GDB, the GNU debugger. |
| 2 | Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
| 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. If the offset is 0, we assume that the symbol is at offset 0 |
| 73 | in the OSO object file and a symbol lookup in the main file is |
| 74 | required to get the offset. */ |
| 75 | asymbol **symbols; |
| 76 | bfd_vma *offsets; |
| 77 | } |
| 78 | oso_el; |
| 79 | |
| 80 | /* Vector of object files to be read after the executable. */ |
| 81 | DEF_VEC_O (oso_el); |
| 82 | static VEC (oso_el) *oso_vector; |
| 83 | |
| 84 | /* Add a new OSO to the vector. */ |
| 85 | |
| 86 | static void |
| 87 | macho_add_oso (const asymbol *oso_sym, int nbr_sections, |
| 88 | asymbol **symbols, bfd_vma *offsets) |
| 89 | { |
| 90 | oso_el el; |
| 91 | |
| 92 | el.name = oso_sym->name; |
| 93 | el.mtime = oso_sym->value; |
| 94 | el.num_sections = nbr_sections; |
| 95 | el.symbols = symbols; |
| 96 | el.offsets = offsets; |
| 97 | VEC_safe_push (oso_el, oso_vector, &el); |
| 98 | } |
| 99 | |
| 100 | /* Build the minimal symbol table from SYMBOL_TABLE of length |
| 101 | NUMBER_OF_SYMBOLS for OBJFILE. |
| 102 | Read OSO files at the end. */ |
| 103 | |
| 104 | static void |
| 105 | macho_symtab_read (struct objfile *objfile, |
| 106 | long number_of_symbols, asymbol **symbol_table) |
| 107 | { |
| 108 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 109 | long storage_needed; |
| 110 | long i, j; |
| 111 | CORE_ADDR offset; |
| 112 | enum minimal_symbol_type ms_type; |
| 113 | unsigned int nbr_sections = bfd_count_sections (objfile->obfd); |
| 114 | asymbol **first_symbol = NULL; |
| 115 | bfd_vma *first_offset = NULL; |
| 116 | const asymbol *oso_file = NULL; |
| 117 | |
| 118 | for (i = 0; i < number_of_symbols; i++) |
| 119 | { |
| 120 | asymbol *sym = symbol_table[i]; |
| 121 | bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; |
| 122 | |
| 123 | offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
| 124 | |
| 125 | if (sym->flags & BSF_DEBUGGING) |
| 126 | { |
| 127 | bfd_vma addr; |
| 128 | |
| 129 | /* Debugging symbols are used to collect OSO file names as well |
| 130 | as section offsets. */ |
| 131 | |
| 132 | switch (mach_o_sym->n_type) |
| 133 | { |
| 134 | case N_SO: |
| 135 | /* An empty SO entry terminates a chunk for an OSO file. */ |
| 136 | if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) |
| 137 | { |
| 138 | macho_add_oso (oso_file, nbr_sections, |
| 139 | first_symbol, first_offset); |
| 140 | first_symbol = NULL; |
| 141 | first_offset = NULL; |
| 142 | oso_file = NULL; |
| 143 | } |
| 144 | break; |
| 145 | case N_FUN: |
| 146 | case N_STSYM: |
| 147 | if (sym->name == NULL || sym->name[0] == '\0') |
| 148 | break; |
| 149 | /* Fall through. */ |
| 150 | case N_BNSYM: |
| 151 | gdb_assert (oso_file != NULL); |
| 152 | addr = sym->value |
| 153 | + bfd_get_section_vma (sym->section->bfd, sym->section); |
| 154 | if (addr != 0 |
| 155 | && first_symbol[sym->section->index] == NULL) |
| 156 | { |
| 157 | /* These STAB entries can directly relocate a section. */ |
| 158 | first_symbol[sym->section->index] = sym; |
| 159 | first_offset[sym->section->index] = addr + offset; |
| 160 | } |
| 161 | break; |
| 162 | case N_GSYM: |
| 163 | gdb_assert (oso_file != NULL); |
| 164 | if (first_symbol[sym->section->index] == NULL) |
| 165 | { |
| 166 | /* This STAB entry needs a symbol look-up to relocate |
| 167 | the section. */ |
| 168 | first_symbol[sym->section->index] = sym; |
| 169 | first_offset[sym->section->index] = 0; |
| 170 | } |
| 171 | break; |
| 172 | case N_OSO: |
| 173 | /* New OSO file. */ |
| 174 | gdb_assert (oso_file == NULL); |
| 175 | first_symbol = (asymbol **)xmalloc (nbr_sections |
| 176 | * sizeof (asymbol *)); |
| 177 | first_offset = (bfd_vma *)xmalloc (nbr_sections |
| 178 | * sizeof (bfd_vma)); |
| 179 | for (j = 0; j < nbr_sections; j++) |
| 180 | first_symbol[j] = NULL; |
| 181 | oso_file = sym; |
| 182 | break; |
| 183 | } |
| 184 | continue; |
| 185 | } |
| 186 | |
| 187 | if (sym->name == NULL || *sym->name == '\0') |
| 188 | { |
| 189 | /* Skip names that don't exist (shouldn't happen), or names |
| 190 | that are null strings (may happen). */ |
| 191 | continue; |
| 192 | } |
| 193 | |
| 194 | if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) |
| 195 | { |
| 196 | struct minimal_symbol *msym; |
| 197 | CORE_ADDR symaddr; |
| 198 | |
| 199 | /* Bfd symbols are section relative. */ |
| 200 | symaddr = sym->value + sym->section->vma; |
| 201 | |
| 202 | /* Select global/local/weak symbols. Note that bfd puts abs |
| 203 | symbols in their own section, so all symbols we are |
| 204 | interested in will have a section. */ |
| 205 | /* Relocate all non-absolute and non-TLS symbols by the |
| 206 | section offset. */ |
| 207 | if (sym->section != &bfd_abs_section |
| 208 | && !(sym->section->flags & SEC_THREAD_LOCAL)) |
| 209 | symaddr += offset; |
| 210 | |
| 211 | if (sym->section == &bfd_abs_section) |
| 212 | ms_type = mst_abs; |
| 213 | else if (sym->section->flags & SEC_CODE) |
| 214 | { |
| 215 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
| 216 | ms_type = mst_text; |
| 217 | else |
| 218 | ms_type = mst_file_text; |
| 219 | } |
| 220 | else if (sym->section->flags & SEC_ALLOC) |
| 221 | { |
| 222 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
| 223 | { |
| 224 | if (sym->section->flags & SEC_LOAD) |
| 225 | ms_type = mst_data; |
| 226 | else |
| 227 | ms_type = mst_bss; |
| 228 | } |
| 229 | else if (sym->flags & BSF_LOCAL) |
| 230 | { |
| 231 | /* Not a special stabs-in-elf symbol, do regular |
| 232 | symbol processing. */ |
| 233 | if (sym->section->flags & SEC_LOAD) |
| 234 | ms_type = mst_file_data; |
| 235 | else |
| 236 | ms_type = mst_file_bss; |
| 237 | } |
| 238 | else |
| 239 | ms_type = mst_unknown; |
| 240 | } |
| 241 | else |
| 242 | continue; /* Skip this symbol. */ |
| 243 | |
| 244 | gdb_assert (sym->section->index < nbr_sections); |
| 245 | if (oso_file != NULL |
| 246 | && first_symbol[sym->section->index] == NULL) |
| 247 | { |
| 248 | /* Standard symbols can directly relocate sections. */ |
| 249 | first_symbol[sym->section->index] = sym; |
| 250 | first_offset[sym->section->index] = symaddr; |
| 251 | } |
| 252 | |
| 253 | msym = prim_record_minimal_symbol_and_info |
| 254 | (sym->name, symaddr, ms_type, sym->section->index, |
| 255 | sym->section, objfile); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | /* Just in case there is no trailing SO entry. */ |
| 260 | if (oso_file != NULL) |
| 261 | macho_add_oso (oso_file, nbr_sections, first_symbol, first_offset); |
| 262 | } |
| 263 | |
| 264 | /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), |
| 265 | returns the length of the archive name. |
| 266 | Returns -1 otherwise. */ |
| 267 | |
| 268 | static int |
| 269 | get_archive_prefix_len (const char *name) |
| 270 | { |
| 271 | char *lparen; |
| 272 | int name_len = strlen (name); |
| 273 | |
| 274 | if (name_len == 0 || name[name_len - 1] != ')') |
| 275 | return -1; |
| 276 | |
| 277 | lparen = strrchr (name, '('); |
| 278 | if (lparen == NULL || lparen == name) |
| 279 | return -1; |
| 280 | return lparen - name; |
| 281 | } |
| 282 | |
| 283 | static int |
| 284 | oso_el_compare_name (const void *vl, const void *vr) |
| 285 | { |
| 286 | const oso_el *l = (const oso_el *)vl; |
| 287 | const oso_el *r = (const oso_el *)vr; |
| 288 | |
| 289 | return strcmp (l->name, r->name); |
| 290 | } |
| 291 | |
| 292 | /* Add an oso file as a symbol file. */ |
| 293 | |
| 294 | static void |
| 295 | macho_add_oso_symfile (oso_el *oso, bfd *abfd, struct objfile *main_objfile) |
| 296 | { |
| 297 | struct section_addr_info *addrs; |
| 298 | int len; |
| 299 | int i; |
| 300 | char leading_char; |
| 301 | |
| 302 | if (mach_o_debug_level > 0) |
| 303 | printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); |
| 304 | |
| 305 | if (!bfd_check_format (abfd, bfd_object)) |
| 306 | { |
| 307 | warning (_("`%s': can't read symbols: %s."), oso->name, |
| 308 | bfd_errmsg (bfd_get_error ())); |
| 309 | bfd_close (abfd); |
| 310 | return; |
| 311 | } |
| 312 | |
| 313 | bfd_set_cacheable (abfd, 1); |
| 314 | |
| 315 | /* Compute addr length. */ |
| 316 | len = 0; |
| 317 | for (i = 0; i < oso->num_sections; i++) |
| 318 | if (oso->symbols[i] != NULL) |
| 319 | len++; |
| 320 | |
| 321 | addrs = alloc_section_addr_info (len); |
| 322 | |
| 323 | leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); |
| 324 | |
| 325 | len = 0; |
| 326 | for (i = 0; i < oso->num_sections; i++) |
| 327 | if (oso->symbols[i] != NULL) |
| 328 | { |
| 329 | if (oso->offsets[i]) |
| 330 | addrs->other[len].addr = oso->offsets[i]; |
| 331 | else |
| 332 | { |
| 333 | struct minimal_symbol *msym; |
| 334 | const char *name = oso->symbols[i]->name; |
| 335 | |
| 336 | if (name[0] == leading_char) |
| 337 | ++name; |
| 338 | |
| 339 | if (mach_o_debug_level > 3) |
| 340 | printf_unfiltered (_("resolve sect %s with %s\n"), |
| 341 | oso->symbols[i]->section->name, |
| 342 | oso->symbols[i]->name); |
| 343 | msym = lookup_minimal_symbol (name, NULL, main_objfile); |
| 344 | if (msym == NULL) |
| 345 | { |
| 346 | warning (_("can't find symbol '%s' in minsymtab"), |
| 347 | oso->symbols[i]->name); |
| 348 | addrs->other[len].addr = 0; |
| 349 | } |
| 350 | else |
| 351 | addrs->other[len].addr = SYMBOL_VALUE_ADDRESS (msym); |
| 352 | } |
| 353 | addrs->other[len].name = (char *)oso->symbols[i]->section->name; |
| 354 | len++; |
| 355 | } |
| 356 | |
| 357 | if (mach_o_debug_level > 1) |
| 358 | { |
| 359 | int j; |
| 360 | for (j = 0; j < addrs->num_sections; j++) |
| 361 | printf_unfiltered (_(" %s: %s\n"), |
| 362 | core_addr_to_string (addrs->other[j].addr), |
| 363 | addrs->other[j].name); |
| 364 | } |
| 365 | |
| 366 | symbol_file_add_from_bfd (abfd, 0, addrs, 0); |
| 367 | } |
| 368 | |
| 369 | /* Read symbols from the vector of oso files. */ |
| 370 | |
| 371 | static void |
| 372 | macho_oso_symfile (struct objfile *main_objfile) |
| 373 | { |
| 374 | int ix; |
| 375 | VEC (oso_el) *vec; |
| 376 | oso_el *oso; |
| 377 | |
| 378 | vec = oso_vector; |
| 379 | oso_vector = NULL; |
| 380 | |
| 381 | /* Sort oso by name so that files from libraries are gathered. */ |
| 382 | qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), |
| 383 | sizeof (oso_el), oso_el_compare_name); |
| 384 | |
| 385 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
| 386 | { |
| 387 | int pfx_len; |
| 388 | |
| 389 | /* Check if this is a library name. */ |
| 390 | pfx_len = get_archive_prefix_len (oso->name); |
| 391 | if (pfx_len > 0) |
| 392 | { |
| 393 | bfd *archive_bfd; |
| 394 | bfd *member_bfd; |
| 395 | char *archive_name = XNEWVEC (char, pfx_len + 1); |
| 396 | int last_ix; |
| 397 | oso_el *oso2; |
| 398 | int ix2; |
| 399 | |
| 400 | memcpy (archive_name, oso->name, pfx_len); |
| 401 | archive_name[pfx_len] = '\0'; |
| 402 | |
| 403 | /* Compute number of oso for this archive. */ |
| 404 | for (last_ix = ix; |
| 405 | VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) |
| 406 | { |
| 407 | if (strncmp (oso2->name, archive_name, pfx_len) != 0) |
| 408 | break; |
| 409 | } |
| 410 | |
| 411 | /* Open the archive and check the format. */ |
| 412 | archive_bfd = bfd_openr (archive_name, gnutarget); |
| 413 | if (archive_bfd == NULL) |
| 414 | { |
| 415 | warning (_("Could not open OSO archive file \"%s\""), |
| 416 | archive_name); |
| 417 | ix = last_ix; |
| 418 | continue; |
| 419 | } |
| 420 | if (!bfd_check_format (archive_bfd, bfd_archive)) |
| 421 | { |
| 422 | warning (_("OSO archive file \"%s\" not an archive."), |
| 423 | archive_name); |
| 424 | bfd_close (archive_bfd); |
| 425 | ix = last_ix; |
| 426 | continue; |
| 427 | } |
| 428 | member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); |
| 429 | |
| 430 | if (member_bfd == NULL) |
| 431 | { |
| 432 | warning (_("Could not read archive members out of " |
| 433 | "OSO archive \"%s\""), archive_name); |
| 434 | bfd_close (archive_bfd); |
| 435 | ix = last_ix; |
| 436 | continue; |
| 437 | } |
| 438 | |
| 439 | /* Load all oso in this library. */ |
| 440 | while (member_bfd != NULL) |
| 441 | { |
| 442 | bfd *prev; |
| 443 | const char *member_name = member_bfd->filename; |
| 444 | int member_len = strlen (member_name); |
| 445 | |
| 446 | /* If this member is referenced, add it as a symfile. */ |
| 447 | for (ix2 = ix; ix2 < last_ix; ix2++) |
| 448 | { |
| 449 | oso2 = VEC_index (oso_el, vec, ix2); |
| 450 | |
| 451 | if (oso2->name |
| 452 | && strlen (oso2->name) == pfx_len + member_len + 2 |
| 453 | && !memcmp (member_name, oso2->name + pfx_len + 1, |
| 454 | member_len)) |
| 455 | { |
| 456 | macho_add_oso_symfile (oso2, member_bfd, main_objfile); |
| 457 | oso2->name = NULL; |
| 458 | break; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | prev = member_bfd; |
| 463 | member_bfd = bfd_openr_next_archived_file |
| 464 | (archive_bfd, member_bfd); |
| 465 | |
| 466 | /* Free previous member if not referenced by an oso. */ |
| 467 | if (ix2 >= last_ix) |
| 468 | bfd_close (prev); |
| 469 | } |
| 470 | for (ix2 = ix; ix2 < last_ix; ix2++) |
| 471 | { |
| 472 | oso_el *oso2 = VEC_index (oso_el, vec, ix2); |
| 473 | |
| 474 | if (oso2->name != NULL) |
| 475 | warning (_("Could not find specified archive member " |
| 476 | "for OSO name \"%s\""), oso->name); |
| 477 | } |
| 478 | ix = last_ix; |
| 479 | } |
| 480 | else |
| 481 | { |
| 482 | bfd *abfd; |
| 483 | |
| 484 | abfd = bfd_openr (oso->name, gnutarget); |
| 485 | if (!abfd) |
| 486 | warning (_("`%s': can't open to read symbols: %s."), oso->name, |
| 487 | bfd_errmsg (bfd_get_error ())); |
| 488 | else |
| 489 | macho_add_oso_symfile (oso, abfd, main_objfile); |
| 490 | |
| 491 | ix++; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) |
| 496 | { |
| 497 | xfree (oso->symbols); |
| 498 | xfree (oso->offsets); |
| 499 | } |
| 500 | VEC_free (oso_el, vec); |
| 501 | } |
| 502 | |
| 503 | /* DSYM (debug symbols) files contain the debug info of an executable. |
| 504 | This is a separate file created by dsymutil(1) and is similar to debug |
| 505 | link feature on ELF. |
| 506 | DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the |
| 507 | executable name and the executable base name to get the DSYM file name. */ |
| 508 | #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" |
| 509 | |
| 510 | /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. |
| 511 | Return NULL if no valid dsym file is found. */ |
| 512 | |
| 513 | static bfd * |
| 514 | macho_check_dsym (struct objfile *objfile) |
| 515 | { |
| 516 | size_t name_len = strlen (objfile->name); |
| 517 | size_t dsym_len = strlen (DSYM_SUFFIX); |
| 518 | const char *base_name = lbasename (objfile->name); |
| 519 | size_t base_len = strlen (base_name); |
| 520 | char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); |
| 521 | bfd *dsym_bfd; |
| 522 | bfd_mach_o_load_command *main_uuid; |
| 523 | bfd_mach_o_load_command *dsym_uuid; |
| 524 | |
| 525 | strcpy (dsym_filename, objfile->name); |
| 526 | strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
| 527 | strcpy (dsym_filename + name_len + dsym_len, base_name); |
| 528 | |
| 529 | if (access (dsym_filename, R_OK) != 0) |
| 530 | return NULL; |
| 531 | |
| 532 | if (bfd_mach_o_lookup_command (objfile->obfd, |
| 533 | BFD_MACH_O_LC_UUID, &main_uuid) == 0) |
| 534 | { |
| 535 | warning (_("can't find UUID in %s"), objfile->name); |
| 536 | return NULL; |
| 537 | } |
| 538 | dsym_filename = xstrdup (dsym_filename); |
| 539 | dsym_bfd = bfd_openr (dsym_filename, gnutarget); |
| 540 | if (dsym_bfd == NULL) |
| 541 | { |
| 542 | warning (_("can't open dsym file %s"), dsym_filename); |
| 543 | xfree (dsym_filename); |
| 544 | return NULL; |
| 545 | } |
| 546 | |
| 547 | if (!bfd_check_format (dsym_bfd, bfd_object)) |
| 548 | { |
| 549 | bfd_close (dsym_bfd); |
| 550 | warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
| 551 | xfree (dsym_filename); |
| 552 | return NULL; |
| 553 | } |
| 554 | |
| 555 | if (bfd_mach_o_lookup_command (dsym_bfd, |
| 556 | BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
| 557 | { |
| 558 | warning (_("can't find UUID in %s"), dsym_filename); |
| 559 | bfd_close (dsym_bfd); |
| 560 | xfree (dsym_filename); |
| 561 | return NULL; |
| 562 | } |
| 563 | if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
| 564 | sizeof (main_uuid->command.uuid.uuid))) |
| 565 | { |
| 566 | warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); |
| 567 | bfd_close (dsym_bfd); |
| 568 | xfree (dsym_filename); |
| 569 | return NULL; |
| 570 | } |
| 571 | return dsym_bfd; |
| 572 | } |
| 573 | |
| 574 | static void |
| 575 | macho_symfile_read (struct objfile *objfile, int symfile_flags) |
| 576 | { |
| 577 | bfd *abfd = objfile->obfd; |
| 578 | struct cleanup *back_to; |
| 579 | CORE_ADDR offset; |
| 580 | long storage_needed; |
| 581 | bfd *dsym_bfd; |
| 582 | |
| 583 | init_minimal_symbol_collection (); |
| 584 | back_to = make_cleanup_discard_minimal_symbols (); |
| 585 | |
| 586 | /* Get symbols from the symbol table only if the file is an executable. |
| 587 | The symbol table of object files is not relocated and is expected to |
| 588 | be in the executable. */ |
| 589 | if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
| 590 | { |
| 591 | /* Process the normal symbol table first. */ |
| 592 | storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); |
| 593 | if (storage_needed < 0) |
| 594 | error (_("Can't read symbols from %s: %s"), |
| 595 | bfd_get_filename (objfile->obfd), |
| 596 | bfd_errmsg (bfd_get_error ())); |
| 597 | |
| 598 | if (storage_needed > 0) |
| 599 | { |
| 600 | asymbol **symbol_table; |
| 601 | long symcount; |
| 602 | |
| 603 | symbol_table = (asymbol **) xmalloc (storage_needed); |
| 604 | make_cleanup (xfree, symbol_table); |
| 605 | symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); |
| 606 | |
| 607 | if (symcount < 0) |
| 608 | error (_("Can't read symbols from %s: %s"), |
| 609 | bfd_get_filename (objfile->obfd), |
| 610 | bfd_errmsg (bfd_get_error ())); |
| 611 | |
| 612 | macho_symtab_read (objfile, symcount, symbol_table); |
| 613 | } |
| 614 | |
| 615 | install_minimal_symbols (objfile); |
| 616 | |
| 617 | /* Try to read .eh_frame / .debug_frame. */ |
| 618 | /* First, locate these sections. We ignore the result status |
| 619 | as it only checks for debug info. */ |
| 620 | dwarf2_has_info (objfile); |
| 621 | dwarf2_build_frame_info (objfile); |
| 622 | |
| 623 | /* Check for DSYM file. */ |
| 624 | dsym_bfd = macho_check_dsym (objfile); |
| 625 | if (dsym_bfd != NULL) |
| 626 | { |
| 627 | int ix; |
| 628 | oso_el *oso; |
| 629 | struct bfd_section *asect, *dsect; |
| 630 | |
| 631 | if (mach_o_debug_level > 0) |
| 632 | printf_unfiltered (_("dsym file found\n")); |
| 633 | |
| 634 | /* Remove oso. They won't be used. */ |
| 635 | for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) |
| 636 | { |
| 637 | xfree (oso->symbols); |
| 638 | xfree (oso->offsets); |
| 639 | } |
| 640 | VEC_free (oso_el, oso_vector); |
| 641 | oso_vector = NULL; |
| 642 | |
| 643 | /* Set dsym section size. */ |
| 644 | for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; |
| 645 | asect && dsect; |
| 646 | asect = asect->next, dsect = dsect->next) |
| 647 | { |
| 648 | if (strcmp (asect->name, dsect->name) != 0) |
| 649 | break; |
| 650 | bfd_set_section_size (dsym_bfd, dsect, |
| 651 | bfd_get_section_size (asect)); |
| 652 | } |
| 653 | |
| 654 | /* Add the dsym file as a separate file. */ |
| 655 | symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); |
| 656 | |
| 657 | /* Don't try to read dwarf2 from main file or shared libraries. */ |
| 658 | return; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | if (dwarf2_has_info (objfile)) |
| 663 | { |
| 664 | /* DWARF 2 sections */ |
| 665 | dwarf2_build_psymtabs (objfile); |
| 666 | } |
| 667 | |
| 668 | /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
| 669 | and dwarf2_build_frame_info cannot deal with unrelocated sections. */ |
| 670 | |
| 671 | /* Then the oso. */ |
| 672 | if (oso_vector != NULL) |
| 673 | macho_oso_symfile (objfile); |
| 674 | } |
| 675 | |
| 676 | static void |
| 677 | macho_symfile_finish (struct objfile *objfile) |
| 678 | { |
| 679 | } |
| 680 | |
| 681 | static void |
| 682 | macho_symfile_offsets (struct objfile *objfile, |
| 683 | struct section_addr_info *addrs) |
| 684 | { |
| 685 | unsigned int i; |
| 686 | unsigned int num_sections; |
| 687 | struct obj_section *osect; |
| 688 | |
| 689 | /* Allocate section_offsets. */ |
| 690 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
| 691 | objfile->section_offsets = (struct section_offsets *) |
| 692 | obstack_alloc (&objfile->objfile_obstack, |
| 693 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 694 | memset (objfile->section_offsets, 0, |
| 695 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 696 | |
| 697 | /* This code is run when we first add the objfile with |
| 698 | symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are |
| 699 | passed in. The place in symfile.c where the addrs are applied |
| 700 | depends on the addrs having section names. But in the dyld code |
| 701 | we build an anonymous array of addrs, so that code is a no-op. |
| 702 | Because of that, we have to apply the addrs to the sections here. |
| 703 | N.B. if an objfile slides after we've already created it, then it |
| 704 | goes through objfile_relocate. */ |
| 705 | |
| 706 | for (i = 0; i < addrs->num_sections; i++) |
| 707 | { |
| 708 | if (addrs->other[i].name == NULL) |
| 709 | continue; |
| 710 | |
| 711 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
| 712 | { |
| 713 | const char *bfd_sect_name = osect->the_bfd_section->name; |
| 714 | |
| 715 | if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) |
| 716 | { |
| 717 | obj_section_offset (osect) = addrs->other[i].addr; |
| 718 | break; |
| 719 | } |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | objfile->sect_index_text = 0; |
| 724 | |
| 725 | ALL_OBJFILE_OSECTIONS (objfile, osect) |
| 726 | { |
| 727 | const char *bfd_sect_name = osect->the_bfd_section->name; |
| 728 | int sect_index = osect->the_bfd_section->index; |
| 729 | |
| 730 | if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) |
| 731 | bfd_sect_name += 11; |
| 732 | if (strcmp (bfd_sect_name, "__TEXT") == 0 |
| 733 | || strcmp (bfd_sect_name, "__TEXT.__text") == 0) |
| 734 | objfile->sect_index_text = sect_index; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | static struct sym_fns macho_sym_fns = { |
| 739 | bfd_target_mach_o_flavour, |
| 740 | |
| 741 | macho_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 742 | macho_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 743 | macho_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 744 | macho_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 745 | macho_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
| 746 | default_symfile_segments, /* sym_segments: Get segment information from |
| 747 | a file. */ |
| 748 | NULL /* next: pointer to next struct sym_fns */ |
| 749 | }; |
| 750 | |
| 751 | void |
| 752 | _initialize_machoread () |
| 753 | { |
| 754 | add_symtab_fns (&macho_sym_fns); |
| 755 | |
| 756 | add_setshow_zinteger_cmd ("mach-o", class_obscure, |
| 757 | &mach_o_debug_level, _("\ |
| 758 | Set if printing Mach-O symbols processing."), _("\ |
| 759 | Show if printing Mach-O symbols processing."), NULL, |
| 760 | NULL, NULL, |
| 761 | &setdebuglist, &showdebuglist); |
| 762 | } |