9 asection *core_text_sect;
12 /* For mapping symbols to specific .o files during file ordering. */
18 struct function_map *symbol_map;
22 DEFUN (read_function_mappings, (filename), const char *filename)
24 FILE *file = fopen (filename, "r");
30 fprintf (stderr, "%s: could not open %s.\n", whoami, filename);
34 /* First parse the mapping file so we know how big we need to
35 make our tables. We also do some sanity checks at this
41 matches = fscanf (file, "%[^\n:]", dummy);
44 fprintf (stderr, "%s: unable to parse mapping file %s.\n",
49 /* Just skip messages about files with no symbols. */
50 if (!strncmp (dummy, "No symbols in ", 14))
56 /* Don't care what else is on this line at this point. */
57 fscanf (file, "%[^\n]\n", dummy);
61 /* Now we know how big we need to make our table. */
62 symbol_map = xmalloc (count * sizeof (struct function_map));
64 /* Rewind the input file so we can read it again. */
67 /* Read each entry and put it into the table. */
74 matches = fscanf (file, "%[^\n:]", dummy);
77 fprintf (stderr, "%s: unable to parse mapping file %s.\n",
82 /* Just skip messages about files with no symbols. */
83 if (!strncmp (dummy, "No symbols in ", 14))
89 /* dummy has the filename, go ahead and copy it. */
90 symbol_map[count].file_name = xmalloc (strlen (dummy) + 1);
91 strcpy (symbol_map[count].file_name, dummy);
93 /* Now we need the function name. */
94 fscanf (file, "%[^\n]\n", dummy);
95 tmp = strrchr (dummy, ' ') + 1;
96 symbol_map[count].function_name = xmalloc (strlen (tmp) + 1);
97 strcpy (symbol_map[count].function_name, tmp);
101 /* Record the size of the map table for future reference. */
102 symbol_map_count = count;
106 DEFUN (core_init, (a_out_name), const char *a_out_name)
108 core_bfd = bfd_openr (a_out_name, 0);
116 if (!bfd_check_format (core_bfd, bfd_object))
118 fprintf (stderr, "%s: %s: not in a.out format\n", whoami, a_out_name);
122 /* get core's text section: */
123 core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
126 core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
129 fprintf (stderr, "%s: can't find .text section in %s\n",
135 /* read core's symbol table: */
137 /* this will probably give us more than we need, but that's ok: */
138 core_num_syms = bfd_get_symtab_upper_bound (core_bfd);
139 if (core_num_syms < 0)
141 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
142 bfd_errmsg (bfd_get_error ()));
146 core_syms = (asymbol **) xmalloc (core_num_syms);
147 core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
148 if (core_num_syms < 0)
150 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
151 bfd_errmsg (bfd_get_error ()));
155 if (function_mapping_file)
156 read_function_mappings (function_mapping_file);
161 * Read in the text space of an a.out file
164 DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd)
166 core_text_space = (PTR) malloc (core_text_sect->_raw_size);
168 if (!core_text_space)
170 fprintf (stderr, "%s: ran out room for %ld bytes of text space\n",
171 whoami, core_text_sect->_raw_size);
174 if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space,
175 0, core_text_sect->_raw_size))
177 bfd_perror ("bfd_get_section_contents");
178 free (core_text_space);
181 if (!core_text_space)
183 fprintf (stderr, "%s: can't do -c\n", whoami);
189 * Return class of symbol SYM. The returned class can be any of:
190 * 0 -> symbol is not interesting to us
191 * 'T' -> symbol is a global name
192 * 't' -> symbol is a local (static) name
195 DEFUN (core_sym_class, (sym), asymbol * sym)
203 * Must be a text symbol, and static text symbols don't qualify if
204 * ignore_static_funcs set.
211 if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
213 DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
218 bfd_get_symbol_info (core_bfd, sym, &syminfo);
223 return i; /* it's a global symbol */
228 /* not a static text symbol */
229 DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
234 /* do some more filtering on static function-names: */
236 if (ignore_static_funcs)
241 * Can't zero-length name or funny characters in name, where
242 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
244 if (!sym->name || sym->name[0] == '\0')
249 for (name = sym->name; *name; ++name)
251 if (*name == '.' || *name == '$')
257 * On systems where the C compiler adds an underscore to all
258 * names, static names without underscores seem usually to be
259 * labels in hand written assembler in the library. We don't want
260 * these names. This is certainly necessary on a Sparc running
261 * SunOS 4.1 (try profiling a program that does a lot of
262 * division). I don't know whether it has harmful side effects on
263 * other systems. Perhaps it should be made configurable.
265 sym_prefix = bfd_get_symbol_leading_char (core_bfd);
266 if (sym_prefix && sym_prefix != sym->name[0]
268 * GCC may add special symbols to help gdb figure out the file
269 * language. We want to ignore these, since sometimes they mask
270 * the real function. (dj@ctron)
272 || !strncmp (sym->name, "__gnu_compiled", 14)
273 || !strncmp (sym->name, "___gnu_compiled", 15))
278 /* If the object file supports marking of function symbols, then we can
279 zap anything that doesn't have BSF_FUNCTION set. */
280 if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
283 return 't'; /* it's a static text symbol */
288 * Get whatever source info we can get regarding address ADDR:
291 DEFUN (get_src_info, (addr, filename, name, line_num),
292 bfd_vma addr AND const char **filename AND const char **name
295 const char *fname = 0, *func_name = 0;
298 if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
299 addr - core_text_sect->vma,
300 &fname, &func_name, (unsigned int *) &l)
301 && fname && func_name && l)
303 DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
304 addr, fname, l, func_name));
312 DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
313 (long) addr, fname ? fname : "<unknown>", l,
314 func_name ? func_name : "<unknown>"));
321 * Read in symbol table from core. One symbol per function is
325 DEFUN (core_create_function_syms, (core_bfd), bfd * core_bfd)
327 bfd_vma min_vma = ~0, max_vma = 0;
328 const char *filename, *func_name;
330 long i, j, found, skip;
332 /* pass 1 - determine upper bound on number of function names: */
334 for (i = 0; i < core_num_syms; ++i)
336 if (!core_sym_class (core_syms[i]))
341 /* This should be replaced with a binary search or hashed
344 Don't create a symtab entry for a function that has
345 a mapping to a file, unless it's the first function
348 for (j = 0; j < symbol_map_count; j++)
349 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
351 if (j > 0 && ! strcmp (symbol_map [j].file_name,
352 symbol_map [j - 1].file_name))
362 fprintf (stderr, "%s: file `%s' has no symbols\n", whoami, a_out_name);
366 /* the "+ 2" is for the sentinels: */
367 symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym));
369 /* pass 2 - create symbols: */
371 symtab.limit = symtab.base;
372 for (i = 0; i < core_num_syms; ++i)
374 class = core_sym_class (core_syms[i]);
378 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
379 core_syms[i]->value, core_syms[i]->name));
382 /* This should be replaced with a binary search or hashed
387 for (j = 0; j < symbol_map_count; j++)
388 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
390 if (j > 0 && ! strcmp (symbol_map [j].file_name,
391 symbol_map [j - 1].file_name))
401 sym_init (symtab.limit);
403 /* symbol offsets are always section-relative: */
405 symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma;
407 && !strcmp (core_syms[i]->name, symbol_map[found].function_name))
409 symtab.limit->name = symbol_map[found].file_name;
410 symtab.limit->mapped = 1;
414 symtab.limit->name = core_syms[i]->name;
415 symtab.limit->mapped = 0;
420 * Suppress symbols that are not function names. This is
421 * useful to suppress code-labels and aliases.
423 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
424 * labels do not appear in the symbol table info, so this isn't
427 if (get_src_info (symtab.limit->addr, &filename, &func_name,
428 &symtab.limit->line_num))
430 symtab.limit->file = source_file_lookup_path (filename);
432 if (strcmp (symtab.limit->name, func_name) != 0)
435 * The symbol's address maps to a different name, so
436 * it can't be a function-entry point. This happens
437 * for labels, for example.
440 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
441 symtab.limit->name, func_name));
447 symtab.limit->is_func = TRUE;
448 symtab.limit->is_bb_head = TRUE;
451 symtab.limit->is_static = TRUE;
454 min_vma = MIN (symtab.limit->addr, min_vma);
455 max_vma = MAX (symtab.limit->addr, max_vma);
458 * If we see "main" without an initial '_', we assume names
459 * are *not* prefixed by '_'.
461 if (symtab.limit->name[0] == 'm' && discard_underscores
462 && strcmp (symtab.limit->name, "main") == 0)
464 discard_underscores = 0;
467 DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
468 (long) (symtab.limit - symtab.base),
469 symtab.limit->name, symtab.limit->addr));
473 /* create sentinels: */
475 sym_init (symtab.limit);
476 symtab.limit->name = "<locore>";
477 symtab.limit->addr = 0;
478 symtab.limit->end_addr = min_vma - 1;
481 sym_init (symtab.limit);
482 symtab.limit->name = "<hicore>";
483 symtab.limit->addr = max_vma + 1;
484 symtab.limit->end_addr = ~0;
487 symtab.len = symtab.limit - symtab.base;
488 symtab_finalize (&symtab);
493 * Read in symbol table from core. One symbol per line of source code
497 DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd)
499 char prev_name[PATH_MAX], prev_filename[PATH_MAX];
500 bfd_vma vma, min_vma = ~0, max_vma = 0;
501 bfd_vma offset, prev_offset, min_dist;
502 Sym *prev, dummy, *sentinel, *sym;
503 const char *filename;
504 int prev_line_num, i;
507 * Create symbols for functions as usual. This is necessary in
508 * cases where parts of a program were not compiled with -g. For
509 * those parts we still want to get info at the function level:
511 core_create_function_syms (core_bfd);
513 /* pass 1 - counter number of symbols: */
516 * To find all line information, walk through all possible
517 * text-space addresses (one by one!) and get the debugging
518 * info for each address. When the debugging info changes,
519 * it is time to create a new symbol.
521 * Of course, this is rather slow and it would be better if
522 * bfd would provide an iterator for enumerating all line
523 * infos, but for now, we try to speed up the second pass
524 * by determining what the minimum code distance between two
529 min_dist = core_text_sect->_raw_size;
530 prev_offset = -min_dist;
531 prev_filename[0] = '\0';
533 for (offset = 0; offset < core_text_sect->_raw_size; ++offset)
535 vma = core_text_sect->vma + offset;
536 if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
537 || (prev_line_num == dummy.line_num &&
538 strcmp (prev_name, dummy.name) == 0
539 && strcmp (prev_filename, filename) == 0))
545 prev_line_num = dummy.line_num;
546 strcpy (prev_name, dummy.name);
547 strcpy (prev_filename, filename);
549 if (offset - prev_offset < min_dist)
551 min_dist = offset - prev_offset;
553 prev_offset = offset;
555 min_vma = MIN (vma, min_vma);
556 max_vma = MAX (vma, max_vma);
559 DBG (AOUTDEBUG, printf ("[core_create_line_syms] min_dist=%lx\n", min_dist));
561 /* make room for function symbols, too: */
562 ltab.len += symtab.len;
563 ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
564 ltab.limit = ltab.base;
566 /* pass 2 - create symbols: */
569 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_dist)
571 sym_init (ltab.limit);
572 if (!get_src_info (core_text_sect->vma + offset, &filename,
573 <ab.limit->name, <ab.limit->line_num)
574 || (prev && prev->line_num == ltab.limit->line_num
575 && strcmp (prev->name, ltab.limit->name) == 0
576 && strcmp (prev->file->name, filename) == 0))
581 /* make name pointer a malloc'ed string: */
582 ltab.limit->name = strdup (ltab.limit->name);
583 ltab.limit->file = source_file_lookup_path (filename);
585 ltab.limit->addr = core_text_sect->vma + offset;
589 * If we see "main" without an initial '_', we assume names
590 * are *not* prefixed by '_'.
592 if (ltab.limit->name[0] == 'm' && discard_underscores
593 && strcmp (ltab.limit->name, "main") == 0)
595 discard_underscores = 0;
598 DBG (AOUTDEBUG, printf ("[core_create_line_syms] %d %s 0x%lx\n",
599 ltab.len, ltab.limit->name,
604 /* update sentinels: */
606 sentinel = sym_lookup (&symtab, 0);
607 if (strcmp (sentinel->name, "<locore>") == 0
608 && min_vma <= sentinel->end_addr)
610 sentinel->end_addr = min_vma - 1;
613 sentinel = sym_lookup (&symtab, ~0);
614 if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr)
616 sentinel->addr = max_vma + 1;
619 /* copy in function symbols: */
620 memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
621 ltab.limit += symtab.len;
623 if (ltab.limit - ltab.base != ltab.len)
626 "%s: somebody miscounted: ltab.len=%ld instead of %d\n",
627 whoami, (long) (ltab.limit - ltab.base), ltab.len);
631 /* finalize ltab and make it symbol table: */
633 symtab_finalize (<ab);
637 /* now go through all core symbols and set is_static accordingly: */
639 for (i = 0; i < core_num_syms; ++i)
641 if (core_sym_class (core_syms[i]) == 't')
643 sym = sym_lookup (&symtab, core_syms[i]->value
644 + core_syms[i]->section->vma);
647 sym++->is_static = TRUE;
649 while (sym->file == sym[-1].file &&
650 strcmp (sym->name, sym[-1].name) == 0);