| 1 | /* corefile.c |
| 2 | |
| 3 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Binutils. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | \f |
| 22 | #include "libiberty.h" |
| 23 | #include "gprof.h" |
| 24 | #include "search_list.h" |
| 25 | #include "source.h" |
| 26 | #include "symtab.h" |
| 27 | #include "corefile.h" |
| 28 | |
| 29 | bfd *core_bfd; |
| 30 | int core_num_syms; |
| 31 | asymbol **core_syms; |
| 32 | asection *core_text_sect; |
| 33 | PTR core_text_space; |
| 34 | |
| 35 | int min_insn_size; |
| 36 | int offset_to_code; |
| 37 | |
| 38 | /* For mapping symbols to specific .o files during file ordering. */ |
| 39 | struct function_map *symbol_map; |
| 40 | unsigned int symbol_map_count; |
| 41 | |
| 42 | static void read_function_mappings PARAMS ((const char *)); |
| 43 | static int core_sym_class PARAMS ((asymbol *)); |
| 44 | static boolean get_src_info |
| 45 | PARAMS ((bfd_vma, const char **, const char **, int *)); |
| 46 | |
| 47 | extern void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 48 | extern void alpha_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 49 | extern void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 50 | extern void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 51 | extern void sparc_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 52 | extern void mips_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| 53 | |
| 54 | static void |
| 55 | read_function_mappings (filename) |
| 56 | const char *filename; |
| 57 | { |
| 58 | FILE *file = fopen (filename, "r"); |
| 59 | char dummy[1024]; |
| 60 | int count = 0; |
| 61 | |
| 62 | if (!file) |
| 63 | { |
| 64 | fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename); |
| 65 | done (1); |
| 66 | } |
| 67 | |
| 68 | /* First parse the mapping file so we know how big we need to |
| 69 | make our tables. We also do some sanity checks at this |
| 70 | time. */ |
| 71 | while (!feof (file)) |
| 72 | { |
| 73 | int matches; |
| 74 | |
| 75 | matches = fscanf (file, "%[^\n:]", dummy); |
| 76 | if (!matches) |
| 77 | { |
| 78 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), |
| 79 | whoami, filename); |
| 80 | done (1); |
| 81 | } |
| 82 | |
| 83 | /* Just skip messages about files with no symbols. */ |
| 84 | if (!strncmp (dummy, "No symbols in ", 14)) |
| 85 | { |
| 86 | fscanf (file, "\n"); |
| 87 | continue; |
| 88 | } |
| 89 | |
| 90 | /* Don't care what else is on this line at this point. */ |
| 91 | fscanf (file, "%[^\n]\n", dummy); |
| 92 | count++; |
| 93 | } |
| 94 | |
| 95 | /* Now we know how big we need to make our table. */ |
| 96 | symbol_map = ((struct function_map *) |
| 97 | xmalloc (count * sizeof (struct function_map))); |
| 98 | |
| 99 | /* Rewind the input file so we can read it again. */ |
| 100 | rewind (file); |
| 101 | |
| 102 | /* Read each entry and put it into the table. */ |
| 103 | count = 0; |
| 104 | while (!feof (file)) |
| 105 | { |
| 106 | int matches; |
| 107 | char *tmp; |
| 108 | |
| 109 | matches = fscanf (file, "%[^\n:]", dummy); |
| 110 | if (!matches) |
| 111 | { |
| 112 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), |
| 113 | whoami, filename); |
| 114 | done (1); |
| 115 | } |
| 116 | |
| 117 | /* Just skip messages about files with no symbols. */ |
| 118 | if (!strncmp (dummy, "No symbols in ", 14)) |
| 119 | { |
| 120 | fscanf (file, "\n"); |
| 121 | continue; |
| 122 | } |
| 123 | |
| 124 | /* dummy has the filename, go ahead and copy it. */ |
| 125 | symbol_map[count].file_name = xmalloc (strlen (dummy) + 1); |
| 126 | strcpy (symbol_map[count].file_name, dummy); |
| 127 | |
| 128 | /* Now we need the function name. */ |
| 129 | fscanf (file, "%[^\n]\n", dummy); |
| 130 | tmp = strrchr (dummy, ' ') + 1; |
| 131 | symbol_map[count].function_name = xmalloc (strlen (tmp) + 1); |
| 132 | strcpy (symbol_map[count].function_name, tmp); |
| 133 | count++; |
| 134 | } |
| 135 | |
| 136 | /* Record the size of the map table for future reference. */ |
| 137 | symbol_map_count = count; |
| 138 | } |
| 139 | |
| 140 | |
| 141 | void |
| 142 | core_init (aout_name) |
| 143 | const char *aout_name; |
| 144 | { |
| 145 | core_bfd = bfd_openr (aout_name, 0); |
| 146 | |
| 147 | if (!core_bfd) |
| 148 | { |
| 149 | perror (aout_name); |
| 150 | done (1); |
| 151 | } |
| 152 | |
| 153 | if (!bfd_check_format (core_bfd, bfd_object)) |
| 154 | { |
| 155 | fprintf (stderr, _("%s: %s: not in a.out format\n"), whoami, aout_name); |
| 156 | done (1); |
| 157 | } |
| 158 | |
| 159 | /* Get core's text section. */ |
| 160 | core_text_sect = bfd_get_section_by_name (core_bfd, ".text"); |
| 161 | if (!core_text_sect) |
| 162 | { |
| 163 | core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$"); |
| 164 | if (!core_text_sect) |
| 165 | { |
| 166 | fprintf (stderr, _("%s: can't find .text section in %s\n"), |
| 167 | whoami, aout_name); |
| 168 | done (1); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | /* Read core's symbol table. */ |
| 173 | |
| 174 | /* This will probably give us more than we need, but that's ok. */ |
| 175 | core_num_syms = bfd_get_symtab_upper_bound (core_bfd); |
| 176 | if (core_num_syms < 0) |
| 177 | { |
| 178 | fprintf (stderr, "%s: %s: %s\n", whoami, aout_name, |
| 179 | bfd_errmsg (bfd_get_error ())); |
| 180 | done (1); |
| 181 | } |
| 182 | |
| 183 | core_syms = (asymbol **) xmalloc (core_num_syms); |
| 184 | core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms); |
| 185 | |
| 186 | if (core_num_syms < 0) |
| 187 | { |
| 188 | fprintf (stderr, "%s: %s: %s\n", whoami, aout_name, |
| 189 | bfd_errmsg (bfd_get_error ())); |
| 190 | done (1); |
| 191 | } |
| 192 | |
| 193 | min_insn_size = 1; |
| 194 | offset_to_code = 0; |
| 195 | |
| 196 | switch (bfd_get_arch (core_bfd)) |
| 197 | { |
| 198 | case bfd_arch_vax: |
| 199 | case bfd_arch_tahoe: |
| 200 | offset_to_code = 2; |
| 201 | break; |
| 202 | |
| 203 | case bfd_arch_alpha: |
| 204 | min_insn_size = 4; |
| 205 | break; |
| 206 | |
| 207 | default: |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | if (function_mapping_file) |
| 212 | read_function_mappings (function_mapping_file); |
| 213 | } |
| 214 | |
| 215 | /* Read in the text space of an a.out file. */ |
| 216 | |
| 217 | void |
| 218 | core_get_text_space (cbfd) |
| 219 | bfd *cbfd; |
| 220 | { |
| 221 | core_text_space = (PTR) malloc ((unsigned int) core_text_sect->_raw_size); |
| 222 | |
| 223 | if (!core_text_space) |
| 224 | { |
| 225 | fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"), |
| 226 | whoami, (unsigned long) core_text_sect->_raw_size); |
| 227 | done (1); |
| 228 | } |
| 229 | |
| 230 | if (!bfd_get_section_contents (cbfd, core_text_sect, core_text_space, |
| 231 | (bfd_vma) 0, core_text_sect->_raw_size)) |
| 232 | { |
| 233 | bfd_perror ("bfd_get_section_contents"); |
| 234 | free (core_text_space); |
| 235 | core_text_space = 0; |
| 236 | } |
| 237 | |
| 238 | if (!core_text_space) |
| 239 | fprintf (stderr, _("%s: can't do -c\n"), whoami); |
| 240 | } |
| 241 | |
| 242 | |
| 243 | void |
| 244 | find_call (parent, p_lowpc, p_highpc) |
| 245 | Sym *parent; |
| 246 | bfd_vma p_lowpc; |
| 247 | bfd_vma p_highpc; |
| 248 | { |
| 249 | switch (bfd_get_arch (core_bfd)) |
| 250 | { |
| 251 | case bfd_arch_i386: |
| 252 | i386_find_call (parent, p_lowpc, p_highpc); |
| 253 | break; |
| 254 | |
| 255 | case bfd_arch_alpha: |
| 256 | alpha_find_call (parent, p_lowpc, p_highpc); |
| 257 | break; |
| 258 | |
| 259 | case bfd_arch_vax: |
| 260 | vax_find_call (parent, p_lowpc, p_highpc); |
| 261 | break; |
| 262 | |
| 263 | case bfd_arch_sparc: |
| 264 | sparc_find_call (parent, p_lowpc, p_highpc); |
| 265 | break; |
| 266 | |
| 267 | case bfd_arch_tahoe: |
| 268 | tahoe_find_call (parent, p_lowpc, p_highpc); |
| 269 | break; |
| 270 | |
| 271 | case bfd_arch_mips: |
| 272 | mips_find_call (parent, p_lowpc, p_highpc); |
| 273 | break; |
| 274 | |
| 275 | default: |
| 276 | fprintf (stderr, _("%s: -c not supported on architecture %s\n"), |
| 277 | whoami, bfd_printable_name(core_bfd)); |
| 278 | |
| 279 | /* Don't give the error more than once. */ |
| 280 | ignore_direct_calls = false; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | /* Return class of symbol SYM. The returned class can be any of: |
| 285 | 0 -> symbol is not interesting to us |
| 286 | 'T' -> symbol is a global name |
| 287 | 't' -> symbol is a local (static) name. */ |
| 288 | |
| 289 | static int |
| 290 | core_sym_class (sym) |
| 291 | asymbol *sym; |
| 292 | { |
| 293 | symbol_info syminfo; |
| 294 | const char *name; |
| 295 | char sym_prefix; |
| 296 | int i; |
| 297 | |
| 298 | if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0) |
| 299 | return 0; |
| 300 | |
| 301 | /* Must be a text symbol, and static text symbols |
| 302 | don't qualify if ignore_static_funcs set. */ |
| 303 | if (ignore_static_funcs && (sym->flags & BSF_LOCAL)) |
| 304 | { |
| 305 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n", |
| 306 | sym->name)); |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | bfd_get_symbol_info (core_bfd, sym, &syminfo); |
| 311 | i = syminfo.type; |
| 312 | |
| 313 | if (i == 'T') |
| 314 | return i; /* It's a global symbol. */ |
| 315 | |
| 316 | if (i == 'W') |
| 317 | /* Treat weak symbols as text symbols. FIXME: a weak symbol may |
| 318 | also be a data symbol. */ |
| 319 | return 'T'; |
| 320 | |
| 321 | if (i != 't') |
| 322 | { |
| 323 | /* Not a static text symbol. */ |
| 324 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n", |
| 325 | sym->name, i)); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /* Do some more filtering on static function-names. */ |
| 330 | if (ignore_static_funcs) |
| 331 | return 0; |
| 332 | |
| 333 | /* Can't zero-length name or funny characters in name, where |
| 334 | `funny' includes: `.' (.o file names) and `$' (Pascal labels). */ |
| 335 | if (!sym->name || sym->name[0] == '\0') |
| 336 | return 0; |
| 337 | |
| 338 | for (name = sym->name; *name; ++name) |
| 339 | { |
| 340 | if (*name == '.' || *name == '$') |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | /* On systems where the C compiler adds an underscore to all |
| 345 | names, static names without underscores seem usually to be |
| 346 | labels in hand written assembler in the library. We don't want |
| 347 | these names. This is certainly necessary on a Sparc running |
| 348 | SunOS 4.1 (try profiling a program that does a lot of |
| 349 | division). I don't know whether it has harmful side effects on |
| 350 | other systems. Perhaps it should be made configurable. */ |
| 351 | sym_prefix = bfd_get_symbol_leading_char (core_bfd); |
| 352 | |
| 353 | if ((sym_prefix && sym_prefix != sym->name[0]) |
| 354 | /* GCC may add special symbols to help gdb figure out the file |
| 355 | language. We want to ignore these, since sometimes they mask |
| 356 | the real function. (dj@ctron) */ |
| 357 | || !strncmp (sym->name, "__gnu_compiled", 14) |
| 358 | || !strncmp (sym->name, "___gnu_compiled", 15)) |
| 359 | { |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | /* If the object file supports marking of function symbols, then |
| 364 | we can zap anything that doesn't have BSF_FUNCTION set. */ |
| 365 | if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0) |
| 366 | return 0; |
| 367 | |
| 368 | return 't'; /* It's a static text symbol. */ |
| 369 | } |
| 370 | |
| 371 | /* Get whatever source info we can get regarding address ADDR. */ |
| 372 | |
| 373 | static boolean |
| 374 | get_src_info (addr, filename, name, line_num) |
| 375 | bfd_vma addr; |
| 376 | const char **filename; |
| 377 | const char **name; |
| 378 | int *line_num; |
| 379 | { |
| 380 | const char *fname = 0, *func_name = 0; |
| 381 | int l = 0; |
| 382 | |
| 383 | if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms, |
| 384 | addr - core_text_sect->vma, |
| 385 | &fname, &func_name, (unsigned int *) &l) |
| 386 | && fname && func_name && l) |
| 387 | { |
| 388 | DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n", |
| 389 | (unsigned long) addr, fname, l, func_name)); |
| 390 | *filename = fname; |
| 391 | *name = func_name; |
| 392 | *line_num = l; |
| 393 | return true; |
| 394 | } |
| 395 | else |
| 396 | { |
| 397 | DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n", |
| 398 | (long) addr, fname ? fname : "<unknown>", l, |
| 399 | func_name ? func_name : "<unknown>")); |
| 400 | return false; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /* Read in symbol table from core. |
| 405 | One symbol per function is entered. */ |
| 406 | |
| 407 | void |
| 408 | core_create_function_syms (cbfd) |
| 409 | bfd *cbfd ATTRIBUTE_UNUSED; |
| 410 | { |
| 411 | bfd_vma min_vma = ~(bfd_vma) 0; |
| 412 | bfd_vma max_vma = 0; |
| 413 | int class; |
| 414 | long i, found, skip; |
| 415 | unsigned int j; |
| 416 | |
| 417 | /* Pass 1 - determine upper bound on number of function names. */ |
| 418 | symtab.len = 0; |
| 419 | |
| 420 | for (i = 0; i < core_num_syms; ++i) |
| 421 | { |
| 422 | if (!core_sym_class (core_syms[i])) |
| 423 | continue; |
| 424 | |
| 425 | /* This should be replaced with a binary search or hashed |
| 426 | search. Gross. |
| 427 | |
| 428 | Don't create a symtab entry for a function that has |
| 429 | a mapping to a file, unless it's the first function |
| 430 | in the file. */ |
| 431 | skip = 0; |
| 432 | for (j = 0; j < symbol_map_count; j++) |
| 433 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) |
| 434 | { |
| 435 | if (j > 0 && ! strcmp (symbol_map [j].file_name, |
| 436 | symbol_map [j - 1].file_name)) |
| 437 | skip = 1; |
| 438 | break; |
| 439 | } |
| 440 | |
| 441 | if (!skip) |
| 442 | ++symtab.len; |
| 443 | } |
| 444 | |
| 445 | if (symtab.len == 0) |
| 446 | { |
| 447 | fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name); |
| 448 | done (1); |
| 449 | } |
| 450 | |
| 451 | /* The "+ 2" is for the sentinels. */ |
| 452 | symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym)); |
| 453 | |
| 454 | /* Pass 2 - create symbols. */ |
| 455 | symtab.limit = symtab.base; |
| 456 | |
| 457 | for (i = 0; i < core_num_syms; ++i) |
| 458 | { |
| 459 | class = core_sym_class (core_syms[i]); |
| 460 | |
| 461 | if (!class) |
| 462 | { |
| 463 | DBG (AOUTDEBUG, |
| 464 | printf ("[core_create_function_syms] rejecting: 0x%lx %s\n", |
| 465 | (unsigned long) core_syms[i]->value, |
| 466 | core_syms[i]->name)); |
| 467 | continue; |
| 468 | } |
| 469 | |
| 470 | /* This should be replaced with a binary search or hashed |
| 471 | search. Gross. */ |
| 472 | skip = 0; |
| 473 | found = 0; |
| 474 | |
| 475 | for (j = 0; j < symbol_map_count; j++) |
| 476 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) |
| 477 | { |
| 478 | if (j > 0 && ! strcmp (symbol_map [j].file_name, |
| 479 | symbol_map [j - 1].file_name)) |
| 480 | skip = 1; |
| 481 | else |
| 482 | found = j; |
| 483 | break; |
| 484 | } |
| 485 | |
| 486 | if (skip) |
| 487 | continue; |
| 488 | |
| 489 | sym_init (symtab.limit); |
| 490 | |
| 491 | /* Symbol offsets are always section-relative. */ |
| 492 | symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma; |
| 493 | |
| 494 | if (symbol_map_count |
| 495 | && !strcmp (core_syms[i]->name, symbol_map[found].function_name)) |
| 496 | { |
| 497 | symtab.limit->name = symbol_map[found].file_name; |
| 498 | symtab.limit->mapped = 1; |
| 499 | } |
| 500 | else |
| 501 | { |
| 502 | symtab.limit->name = core_syms[i]->name; |
| 503 | symtab.limit->mapped = 0; |
| 504 | } |
| 505 | |
| 506 | /* Lookup filename and line number, if we can. */ |
| 507 | { |
| 508 | const char *filename, *func_name; |
| 509 | |
| 510 | if (get_src_info (symtab.limit->addr, &filename, &func_name, |
| 511 | &symtab.limit->line_num)) |
| 512 | { |
| 513 | symtab.limit->file = source_file_lookup_path (filename); |
| 514 | |
| 515 | /* FIXME: Checking __osf__ here does not work with a cross |
| 516 | gprof. */ |
| 517 | #ifdef __osf__ |
| 518 | /* Suppress symbols that are not function names. This is |
| 519 | useful to suppress code-labels and aliases. |
| 520 | |
| 521 | This is known to be useful under DEC's OSF/1. Under SunOS 4.x, |
| 522 | labels do not appear in the symbol table info, so this isn't |
| 523 | necessary. */ |
| 524 | |
| 525 | if (strcmp (symtab.limit->name, func_name) != 0) |
| 526 | { |
| 527 | /* The symbol's address maps to a different name, so |
| 528 | it can't be a function-entry point. This happens |
| 529 | for labels, for example. */ |
| 530 | DBG (AOUTDEBUG, |
| 531 | printf ("[core_create_function_syms: rej %s (maps to %s)\n", |
| 532 | symtab.limit->name, func_name)); |
| 533 | continue; |
| 534 | } |
| 535 | #endif |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | symtab.limit->is_func = true; |
| 540 | symtab.limit->is_bb_head = true; |
| 541 | |
| 542 | if (class == 't') |
| 543 | symtab.limit->is_static = true; |
| 544 | |
| 545 | /* Keep track of the minimum and maximum vma addresses used by all |
| 546 | symbols. When computing the max_vma, use the ending address of the |
| 547 | section containing the symbol, if available. */ |
| 548 | min_vma = MIN (symtab.limit->addr, min_vma); |
| 549 | if (core_syms[i]->section) |
| 550 | max_vma = MAX (core_syms[i]->section->vma |
| 551 | + core_syms[i]->section->_cooked_size - 1, max_vma); |
| 552 | else |
| 553 | max_vma = MAX (symtab.limit->addr, max_vma); |
| 554 | |
| 555 | /* If we see "main" without an initial '_', we assume names |
| 556 | are *not* prefixed by '_'. */ |
| 557 | if (symtab.limit->name[0] == 'm' && discard_underscores |
| 558 | && strcmp (symtab.limit->name, "main") == 0) |
| 559 | discard_underscores = 0; |
| 560 | |
| 561 | DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n", |
| 562 | (long) (symtab.limit - symtab.base), |
| 563 | symtab.limit->name, |
| 564 | (unsigned long) symtab.limit->addr)); |
| 565 | ++symtab.limit; |
| 566 | } |
| 567 | |
| 568 | /* Create sentinels. */ |
| 569 | sym_init (symtab.limit); |
| 570 | symtab.limit->name = "<locore>"; |
| 571 | symtab.limit->addr = 0; |
| 572 | symtab.limit->end_addr = min_vma - 1; |
| 573 | ++symtab.limit; |
| 574 | |
| 575 | sym_init (symtab.limit); |
| 576 | symtab.limit->name = "<hicore>"; |
| 577 | symtab.limit->addr = max_vma + 1; |
| 578 | symtab.limit->end_addr = ~(bfd_vma) 0; |
| 579 | ++symtab.limit; |
| 580 | |
| 581 | symtab.len = symtab.limit - symtab.base; |
| 582 | symtab_finalize (&symtab); |
| 583 | } |
| 584 | |
| 585 | /* Read in symbol table from core. |
| 586 | One symbol per line of source code is entered. */ |
| 587 | |
| 588 | void |
| 589 | core_create_line_syms (cbfd) |
| 590 | bfd *cbfd; |
| 591 | { |
| 592 | char *prev_name, *prev_filename; |
| 593 | unsigned int prev_name_len, prev_filename_len; |
| 594 | bfd_vma vma, min_vma = ~(bfd_vma) 0, max_vma = 0; |
| 595 | bfd_vma offset; |
| 596 | Sym *prev, dummy, *sentinel, *sym; |
| 597 | const char *filename; |
| 598 | int prev_line_num; |
| 599 | Sym_Table ltab; |
| 600 | |
| 601 | /* Create symbols for functions as usual. This is necessary in |
| 602 | cases where parts of a program were not compiled with -g. For |
| 603 | those parts we still want to get info at the function level. */ |
| 604 | core_create_function_syms (cbfd); |
| 605 | |
| 606 | /* Pass 1 - counter number of symbols. */ |
| 607 | |
| 608 | /* To find all line information, walk through all possible |
| 609 | text-space addresses (one by one!) and get the debugging |
| 610 | info for each address. When the debugging info changes, |
| 611 | it is time to create a new symbol. |
| 612 | |
| 613 | Of course, this is rather slow and it would be better if |
| 614 | bfd would provide an iterator for enumerating all line infos. */ |
| 615 | prev_name_len = PATH_MAX; |
| 616 | prev_filename_len = PATH_MAX; |
| 617 | prev_name = xmalloc (prev_name_len); |
| 618 | prev_filename = xmalloc (prev_filename_len); |
| 619 | ltab.len = 0; |
| 620 | prev_line_num = 0; |
| 621 | |
| 622 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
| 623 | { |
| 624 | unsigned int len; |
| 625 | |
| 626 | vma = core_text_sect->vma + offset; |
| 627 | |
| 628 | if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num) |
| 629 | || (prev_line_num == dummy.line_num |
| 630 | && prev_name != NULL |
| 631 | && strcmp (prev_name, dummy.name) == 0 |
| 632 | && strcmp (prev_filename, filename) == 0)) |
| 633 | continue; |
| 634 | |
| 635 | ++ltab.len; |
| 636 | prev_line_num = dummy.line_num; |
| 637 | |
| 638 | len = strlen (dummy.name); |
| 639 | if (len >= prev_name_len) |
| 640 | { |
| 641 | prev_name_len = len + 1024; |
| 642 | free (prev_name); |
| 643 | prev_name = xmalloc (prev_name_len); |
| 644 | } |
| 645 | |
| 646 | strcpy (prev_name, dummy.name); |
| 647 | len = strlen (filename); |
| 648 | |
| 649 | if (len >= prev_filename_len) |
| 650 | { |
| 651 | prev_filename_len = len + 1024; |
| 652 | free (prev_filename); |
| 653 | prev_filename = xmalloc (prev_filename_len); |
| 654 | } |
| 655 | |
| 656 | strcpy (prev_filename, filename); |
| 657 | |
| 658 | min_vma = MIN (vma, min_vma); |
| 659 | max_vma = MAX (vma, max_vma); |
| 660 | } |
| 661 | |
| 662 | free (prev_name); |
| 663 | free (prev_filename); |
| 664 | |
| 665 | /* Make room for function symbols, too. */ |
| 666 | ltab.len += symtab.len; |
| 667 | ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym)); |
| 668 | ltab.limit = ltab.base; |
| 669 | |
| 670 | /* Pass 2 - create symbols. */ |
| 671 | |
| 672 | /* We now set is_static as we go along, rather than by running |
| 673 | through the symbol table at the end. |
| 674 | |
| 675 | The old way called symtab_finalize before the is_static pass, |
| 676 | causing a problem since symtab_finalize uses is_static as part of |
| 677 | its address conflict resolution algorithm. Since global symbols |
| 678 | were prefered over static symbols, and all line symbols were |
| 679 | global at that point, static function names that conflicted with |
| 680 | their own line numbers (static, but labeled as global) were |
| 681 | rejected in favor of the line num. |
| 682 | |
| 683 | This was not the desired functionality. We always want to keep |
| 684 | our function symbols and discard any conflicting line symbols. |
| 685 | Perhaps symtab_finalize should be modified to make this |
| 686 | distinction as well, but the current fix works and the code is a |
| 687 | lot cleaner now. */ |
| 688 | prev = 0; |
| 689 | |
| 690 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
| 691 | { |
| 692 | sym_init (ltab.limit); |
| 693 | |
| 694 | if (!get_src_info (core_text_sect->vma + offset, &filename, |
| 695 | <ab.limit->name, <ab.limit->line_num) |
| 696 | || (prev && prev->line_num == ltab.limit->line_num |
| 697 | && strcmp (prev->name, ltab.limit->name) == 0 |
| 698 | && strcmp (prev->file->name, filename) == 0)) |
| 699 | continue; |
| 700 | |
| 701 | /* Make name pointer a malloc'ed string. */ |
| 702 | ltab.limit->name = xstrdup (ltab.limit->name); |
| 703 | ltab.limit->file = source_file_lookup_path (filename); |
| 704 | |
| 705 | ltab.limit->addr = core_text_sect->vma + offset; |
| 706 | |
| 707 | /* Set is_static based on the enclosing function, using either: |
| 708 | 1) the previous symbol, if it's from the same function, or |
| 709 | 2) a symtab lookup. */ |
| 710 | if (prev && ltab.limit->file == prev->file && |
| 711 | strcmp (ltab.limit->name, prev->name) == 0) |
| 712 | { |
| 713 | ltab.limit->is_static = prev->is_static; |
| 714 | } |
| 715 | else |
| 716 | { |
| 717 | sym = sym_lookup(&symtab, ltab.limit->addr); |
| 718 | ltab.limit->is_static = sym->is_static; |
| 719 | } |
| 720 | |
| 721 | prev = ltab.limit; |
| 722 | |
| 723 | /* If we see "main" without an initial '_', we assume names |
| 724 | are *not* prefixed by '_'. */ |
| 725 | if (ltab.limit->name[0] == 'm' && discard_underscores |
| 726 | && strcmp (ltab.limit->name, "main") == 0) |
| 727 | discard_underscores = 0; |
| 728 | |
| 729 | DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n", |
| 730 | (unsigned long) (ltab.limit - ltab.base), |
| 731 | ltab.limit->name, |
| 732 | (unsigned long) ltab.limit->addr)); |
| 733 | ++ltab.limit; |
| 734 | } |
| 735 | |
| 736 | /* Update sentinels. */ |
| 737 | sentinel = sym_lookup (&symtab, (bfd_vma) 0); |
| 738 | |
| 739 | if (strcmp (sentinel->name, "<locore>") == 0 |
| 740 | && min_vma <= sentinel->end_addr) |
| 741 | sentinel->end_addr = min_vma - 1; |
| 742 | |
| 743 | sentinel = sym_lookup (&symtab, ~(bfd_vma) 0); |
| 744 | |
| 745 | if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr) |
| 746 | sentinel->addr = max_vma + 1; |
| 747 | |
| 748 | /* Copy in function symbols. */ |
| 749 | memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym)); |
| 750 | ltab.limit += symtab.len; |
| 751 | |
| 752 | if ((unsigned int) (ltab.limit - ltab.base) != ltab.len) |
| 753 | { |
| 754 | fprintf (stderr, |
| 755 | _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"), |
| 756 | whoami, ltab.len, (long) (ltab.limit - ltab.base)); |
| 757 | done (1); |
| 758 | } |
| 759 | |
| 760 | /* Finalize ltab and make it symbol table. */ |
| 761 | symtab_finalize (<ab); |
| 762 | free (symtab.base); |
| 763 | symtab = ltab; |
| 764 | } |