9 asection *core_text_sect;
14 DEFUN (core_init, (a_out_name), const char *a_out_name)
16 core_bfd = bfd_openr (a_out_name, 0);
24 if (!bfd_check_format (core_bfd, bfd_object))
26 fprintf (stderr, "%s: %s: not in a.out format\n", whoami, a_out_name);
30 /* get core's text section: */
31 core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
34 core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
37 fprintf (stderr, "%s: can't find .text section in %s\n",
43 /* read core's symbol table: */
45 /* this will probably give us more than we need, but that's ok: */
46 core_num_syms = bfd_get_symtab_upper_bound (core_bfd);
47 if (core_num_syms < 0)
49 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
50 bfd_errmsg (bfd_get_error ()));
54 core_syms = (asymbol **) xmalloc (core_num_syms);
55 core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
56 if (core_num_syms < 0)
58 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
59 bfd_errmsg (bfd_get_error ()));
66 * Read in the text space of an a.out file
69 DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd)
71 core_text_space = (PTR) malloc (core_text_sect->_raw_size);
75 fprintf (stderr, "%s: ran out room for %ld bytes of text space\n",
76 whoami, core_text_sect->_raw_size);
79 if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space,
80 0, core_text_sect->_raw_size))
82 bfd_perror ("bfd_get_section_contents");
83 free (core_text_space);
88 fprintf (stderr, "%s: can't do -c\n", whoami);
94 * Return class of symbol SYM. The returned class can be any of:
95 * 0 -> symbol is not interesting to us
96 * 'T' -> symbol is a global name
97 * 't' -> symbol is a local (static) name
100 DEFUN (core_sym_class, (sym), asymbol * sym)
108 * Must be a text symbol, and static text symbols don't qualify if
109 * ignore_static_funcs set.
116 if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
118 DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
123 bfd_get_symbol_info (core_bfd, sym, &syminfo);
128 return i; /* it's a global symbol */
133 /* not a static text symbol */
134 DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
139 /* do some more filtering on static function-names: */
141 if (ignore_static_funcs)
146 * Can't zero-length name or funny characters in name, where
147 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
149 if (!sym->name || sym->name[0] == '\0')
154 for (name = sym->name; *name; ++name)
156 if (*name == '.' || *name == '$')
162 * On systems where the C compiler adds an underscore to all
163 * names, static names without underscores seem usually to be
164 * labels in hand written assembler in the library. We don't want
165 * these names. This is certainly necessary on a Sparc running
166 * SunOS 4.1 (try profiling a program that does a lot of
167 * division). I don't know whether it has harmful side effects on
168 * other systems. Perhaps it should be made configurable.
170 sym_prefix = bfd_get_symbol_leading_char (core_bfd);
171 if (sym_prefix && sym_prefix != sym->name[0]
173 * GCC may add special symbols to help gdb figure out the file
174 * language. We want to ignore these, since sometimes they mask
175 * the real function. (dj@ctron)
177 || !strncmp (sym->name, "__gnu_compiled", 14)
178 || !strncmp (sym->name, "___gnu_compiled", 15))
183 /* If the object file supports marking of function symbols, then we can
184 zap anything that doesn't have BSF_FUNCTION set. */
185 if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
188 return 't'; /* it's a static text symbol */
193 * Get whatever source info we can get regarding address ADDR:
196 DEFUN (get_src_info, (addr, filename, name, line_num),
197 bfd_vma addr AND const char **filename AND const char **name
200 const char *fname = 0, *func_name = 0;
203 if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
204 addr - core_text_sect->vma,
205 &fname, &func_name, (unsigned int *) &l)
206 && fname && func_name && l)
208 DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
209 addr, fname, l, func_name));
217 DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
218 (long) addr, fname ? fname : "<unknown>", l,
219 func_name ? func_name : "<unknown>"));
226 * Read in symbol table from core. One symbol per function is
230 DEFUN (core_create_function_syms, (core_bfd), bfd * core_bfd)
232 bfd_vma min_vma = ~0, max_vma = 0;
233 const char *filename, *func_name;
237 /* pass 1 - determine upper bound on number of function names: */
239 for (i = 0; i < core_num_syms; ++i)
241 if (!core_sym_class (core_syms[i]))
250 fprintf (stderr, "%s: file `%s' has no symbols\n", whoami, a_out_name);
254 /* the "+ 2" is for the sentinels: */
255 symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym));
257 /* pass 2 - create symbols: */
259 symtab.limit = symtab.base;
260 for (i = 0; i < core_num_syms; ++i)
262 class = core_sym_class (core_syms[i]);
266 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
267 core_syms[i]->value, core_syms[i]->name));
271 sym_init (symtab.limit);
273 /* symbol offsets are always section-relative: */
275 symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma;
276 symtab.limit->name = core_syms[i]->name;
280 * Suppress symbols that are not function names. This is
281 * useful to suppress code-labels and aliases.
283 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
284 * labels do not appear in the symbol table info, so this isn't
287 if (get_src_info (symtab.limit->addr, &filename, &func_name,
288 &symtab.limit->line_num))
290 symtab.limit->file = source_file_lookup_path (filename);
292 if (strcmp (symtab.limit->name, func_name) != 0)
295 * The symbol's address maps to a different name, so
296 * it can't be a function-entry point. This happens
297 * for labels, for example.
300 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
301 symtab.limit->name, func_name));
307 symtab.limit->is_func = TRUE;
308 symtab.limit->is_bb_head = TRUE;
311 symtab.limit->is_static = TRUE;
314 min_vma = MIN (symtab.limit->addr, min_vma);
315 max_vma = MAX (symtab.limit->addr, max_vma);
318 * If we see "main" without an initial '_', we assume names
319 * are *not* prefixed by '_'.
321 if (symtab.limit->name[0] == 'm' && discard_underscores
322 && strcmp (symtab.limit->name, "main") == 0)
324 discard_underscores = 0;
327 DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
328 (long) (symtab.limit - symtab.base),
329 symtab.limit->name, symtab.limit->addr));
333 /* create sentinels: */
335 sym_init (symtab.limit);
336 symtab.limit->name = "<locore>";
337 symtab.limit->addr = 0;
338 symtab.limit->end_addr = min_vma - 1;
341 sym_init (symtab.limit);
342 symtab.limit->name = "<hicore>";
343 symtab.limit->addr = max_vma + 1;
344 symtab.limit->end_addr = ~0;
347 symtab.len = symtab.limit - symtab.base;
348 symtab_finalize (&symtab);
353 * Read in symbol table from core. One symbol per line of source code
357 DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd)
359 char prev_name[PATH_MAX], prev_filename[PATH_MAX];
360 bfd_vma vma, min_vma = ~0, max_vma = 0;
361 bfd_vma offset, prev_offset, min_dist;
362 Sym *prev, dummy, *sentinel, *sym;
363 const char *filename;
364 int prev_line_num, i;
367 * Create symbols for functions as usual. This is necessary in
368 * cases where parts of a program were not compiled with -g. For
369 * those parts we still want to get info at the function level:
371 core_create_function_syms (core_bfd);
373 /* pass 1 - counter number of symbols: */
376 * To find all line information, walk through all possible
377 * text-space addresses (one by one!) and get the debugging
378 * info for each address. When the debugging info changes,
379 * it is time to create a new symbol.
381 * Of course, this is rather slow and it would be better if
382 * bfd would provide an iterator for enumerating all line
383 * infos, but for now, we try to speed up the second pass
384 * by determining what the minimum code distance between two
389 min_dist = core_text_sect->_raw_size;
390 prev_offset = -min_dist;
391 prev_filename[0] = '\0';
393 for (offset = 0; offset < core_text_sect->_raw_size; ++offset)
395 vma = core_text_sect->vma + offset;
396 if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
397 || (prev_line_num == dummy.line_num &&
398 strcmp (prev_name, dummy.name) == 0
399 && strcmp (prev_filename, filename) == 0))
405 prev_line_num = dummy.line_num;
406 strcpy (prev_name, dummy.name);
407 strcpy (prev_filename, filename);
409 if (offset - prev_offset < min_dist)
411 min_dist = offset - prev_offset;
413 prev_offset = offset;
415 min_vma = MIN (vma, min_vma);
416 max_vma = MAX (vma, max_vma);
419 DBG (AOUTDEBUG, printf ("[core_create_line_syms] min_dist=%lx\n", min_dist));
421 /* make room for function symbols, too: */
422 ltab.len += symtab.len;
423 ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
424 ltab.limit = ltab.base;
426 /* pass 2 - create symbols: */
429 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_dist)
431 sym_init (ltab.limit);
432 if (!get_src_info (core_text_sect->vma + offset, &filename,
433 <ab.limit->name, <ab.limit->line_num)
434 || (prev && prev->line_num == ltab.limit->line_num
435 && strcmp (prev->name, ltab.limit->name) == 0
436 && strcmp (prev->file->name, filename) == 0))
441 /* make name pointer a malloc'ed string: */
442 ltab.limit->name = strdup (ltab.limit->name);
443 ltab.limit->file = source_file_lookup_path (filename);
445 ltab.limit->addr = core_text_sect->vma + offset;
449 * If we see "main" without an initial '_', we assume names
450 * are *not* prefixed by '_'.
452 if (ltab.limit->name[0] == 'm' && discard_underscores
453 && strcmp (ltab.limit->name, "main") == 0)
455 discard_underscores = 0;
458 DBG (AOUTDEBUG, printf ("[core_create_line_syms] %d %s 0x%lx\n",
459 ltab.len, ltab.limit->name,
464 /* update sentinels: */
466 sentinel = sym_lookup (&symtab, 0);
467 if (strcmp (sentinel->name, "<locore>") == 0
468 && min_vma <= sentinel->end_addr)
470 sentinel->end_addr = min_vma - 1;
473 sentinel = sym_lookup (&symtab, ~0);
474 if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr)
476 sentinel->addr = max_vma + 1;
479 /* copy in function symbols: */
480 memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
481 ltab.limit += symtab.len;
483 if (ltab.limit - ltab.base != ltab.len)
486 "%s: somebody miscounted: ltab.len=%ld instead of %d\n",
487 whoami, (long) (ltab.limit - ltab.base), ltab.len);
491 /* finalize ltab and make it symbol table: */
493 symtab_finalize (<ab);
497 /* now go through all core symbols and set is_static accordingly: */
499 for (i = 0; i < core_num_syms; ++i)
501 if (core_sym_class (core_syms[i]) == 't')
503 sym = sym_lookup (&symtab, core_syms[i]->value
504 + core_syms[i]->section->vma);
507 sym++->is_static = TRUE;
509 while (sym->file == sym[-1].file &&
510 strcmp (sym->name, sym[-1].name) == 0);