3 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GNU Binutils.
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.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
24 #include "libiberty.h"
25 #include "search_list.h"
30 #include "safe-ctype.h"
33 static int core_num_syms;
34 static asymbol **core_syms;
35 asection *core_text_sect;
36 void * core_text_space;
38 static int min_insn_size;
41 /* For mapping symbols to specific .o files during file ordering. */
42 struct function_map * symbol_map;
43 unsigned int symbol_map_count;
45 static void read_function_mappings (const char *);
46 static int core_sym_class (asymbol *);
47 static bfd_boolean get_src_info
48 (bfd_vma, const char **, const char **, int *);
50 extern void i386_find_call (Sym *, bfd_vma, bfd_vma);
51 extern void alpha_find_call (Sym *, bfd_vma, bfd_vma);
52 extern void vax_find_call (Sym *, bfd_vma, bfd_vma);
53 extern void tahoe_find_call (Sym *, bfd_vma, bfd_vma);
54 extern void sparc_find_call (Sym *, bfd_vma, bfd_vma);
55 extern void mips_find_call (Sym *, bfd_vma, bfd_vma);
58 parse_error (const char *filename)
60 fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), whoami, filename);
65 read_function_mappings (const char *filename)
67 FILE *file = fopen (filename, "r");
73 fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename);
77 /* First parse the mapping file so we know how big we need to
78 make our tables. We also do some sanity checks at this
84 matches = fscanf (file, "%[^\n:]", dummy);
86 parse_error (filename);
88 /* Just skip messages about files with no symbols. */
89 if (!strncmp (dummy, "No symbols in ", 14))
91 matches = fscanf (file, "\n");
93 parse_error (filename);
97 /* Don't care what else is on this line at this point. */
98 matches = fscanf (file, "%[^\n]\n", dummy);
100 parse_error (filename);
104 /* Now we know how big we need to make our table. */
105 symbol_map = ((struct function_map *)
106 xmalloc (count * sizeof (struct function_map)));
108 /* Rewind the input file so we can read it again. */
111 /* Read each entry and put it into the table. */
118 matches = fscanf (file, "%[^\n:]", dummy);
120 parse_error (filename);
122 /* Just skip messages about files with no symbols. */
123 if (!strncmp (dummy, "No symbols in ", 14))
125 matches = fscanf (file, "\n");
127 parse_error (filename);
131 /* dummy has the filename, go ahead and copy it. */
132 symbol_map[count].file_name = xmalloc (strlen (dummy) + 1);
133 strcpy (symbol_map[count].file_name, dummy);
135 /* Now we need the function name. */
136 matches = fscanf (file, "%[^\n]\n", dummy);
138 parse_error (filename);
139 tmp = strrchr (dummy, ' ') + 1;
140 symbol_map[count].function_name = xmalloc (strlen (tmp) + 1);
141 strcpy (symbol_map[count].function_name, tmp);
145 /* Record the size of the map table for future reference. */
146 symbol_map_count = count;
151 core_init (const char *aout_name)
157 core_bfd = bfd_openr (aout_name, 0);
165 if (!bfd_check_format (core_bfd, bfd_object))
167 fprintf (stderr, _("%s: %s: not in executable format\n"), whoami, aout_name);
171 /* Get core's text section. */
172 core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
175 core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
178 fprintf (stderr, _("%s: can't find .text section in %s\n"),
184 /* Read core's symbol table. */
186 /* This will probably give us more than we need, but that's ok. */
187 core_sym_bytes = bfd_get_symtab_upper_bound (core_bfd);
188 if (core_sym_bytes < 0)
190 fprintf (stderr, "%s: %s: %s\n", whoami, aout_name,
191 bfd_errmsg (bfd_get_error ()));
195 core_syms = (asymbol **) xmalloc (core_sym_bytes);
196 core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
198 if (core_num_syms < 0)
200 fprintf (stderr, "%s: %s: %s\n", whoami, aout_name,
201 bfd_errmsg (bfd_get_error ()));
205 synth_count = bfd_get_synthetic_symtab (core_bfd, core_num_syms, core_syms,
206 0, NULL, &synthsyms);
213 new_size = (core_num_syms + synth_count + 1) * sizeof (*core_syms);
214 core_syms = xrealloc (core_syms, new_size);
215 symp = core_syms + core_num_syms;
216 core_num_syms += synth_count;
217 for (i = 0; i < synth_count; i++)
218 *symp++ = synthsyms + i;
225 switch (bfd_get_arch (core_bfd))
240 if (function_mapping_file)
241 read_function_mappings (function_mapping_file);
244 /* Read in the text space of an a.out file. */
247 core_get_text_space (bfd *cbfd)
249 core_text_space = malloc (bfd_get_section_size (core_text_sect));
251 if (!core_text_space)
253 fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"),
254 whoami, (unsigned long) bfd_get_section_size (core_text_sect));
258 if (!bfd_get_section_contents (cbfd, core_text_sect, core_text_space,
259 0, bfd_get_section_size (core_text_sect)))
261 bfd_perror ("bfd_get_section_contents");
262 free (core_text_space);
266 if (!core_text_space)
267 fprintf (stderr, _("%s: can't do -c\n"), whoami);
272 find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
274 if (core_text_space == 0)
277 hist_clip_symbol_address (&p_lowpc, &p_highpc);
279 switch (bfd_get_arch (core_bfd))
282 i386_find_call (parent, p_lowpc, p_highpc);
286 alpha_find_call (parent, p_lowpc, p_highpc);
290 vax_find_call (parent, p_lowpc, p_highpc);
294 sparc_find_call (parent, p_lowpc, p_highpc);
298 tahoe_find_call (parent, p_lowpc, p_highpc);
302 mips_find_call (parent, p_lowpc, p_highpc);
306 fprintf (stderr, _("%s: -c not supported on architecture %s\n"),
307 whoami, bfd_printable_name(core_bfd));
309 /* Don't give the error more than once. */
310 ignore_direct_calls = FALSE;
314 /* Return class of symbol SYM. The returned class can be any of:
315 0 -> symbol is not interesting to us
316 'T' -> symbol is a global name
317 't' -> symbol is a local (static) name. */
320 core_sym_class (asymbol *sym)
327 if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0)
330 /* Must be a text symbol, and static text symbols
331 don't qualify if ignore_static_funcs set. */
332 if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
334 DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
339 bfd_get_symbol_info (core_bfd, sym, &syminfo);
343 return i; /* It's a global symbol. */
346 /* Treat weak symbols as text symbols. FIXME: a weak symbol may
347 also be a data symbol. */
352 /* Not a static text symbol. */
353 DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
358 /* Do some more filtering on static function-names. */
359 if (ignore_static_funcs)
362 /* Can't zero-length name or funny characters in name, where
363 `funny' includes: `.' (.o file names) and `$' (Pascal labels). */
364 if (!sym->name || sym->name[0] == '\0')
367 for (name = sym->name; *name; ++name)
372 /* Do not discard nested subprograms (those
373 which end with .NNN, where N are digits). */
375 for (name++; *name; name++)
376 if (! ISDIGIT (*name))
380 /* On systems where the C compiler adds an underscore to all
381 names, static names without underscores seem usually to be
382 labels in hand written assembler in the library. We don't want
383 these names. This is certainly necessary on a Sparc running
384 SunOS 4.1 (try profiling a program that does a lot of
385 division). I don't know whether it has harmful side effects on
386 other systems. Perhaps it should be made configurable. */
387 sym_prefix = bfd_get_symbol_leading_char (core_bfd);
389 if ((sym_prefix && sym_prefix != sym->name[0])
390 /* GCC may add special symbols to help gdb figure out the file
391 language. We want to ignore these, since sometimes they mask
392 the real function. (dj@ctron) */
393 || !strncmp (sym->name, "__gnu_compiled", 14)
394 || !strncmp (sym->name, "___gnu_compiled", 15))
399 /* If the object file supports marking of function symbols, then
400 we can zap anything that doesn't have BSF_FUNCTION set. */
401 if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
404 return 't'; /* It's a static text symbol. */
407 /* Get whatever source info we can get regarding address ADDR. */
410 get_src_info (bfd_vma addr, const char **filename, const char **name, int *line_num)
412 const char *fname = 0, *func_name = 0;
415 if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
416 addr - core_text_sect->vma,
417 &fname, &func_name, (unsigned int *) &l)
418 && fname && func_name && l)
420 DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
421 (unsigned long) addr, fname, l, func_name));
429 DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
430 (unsigned long) addr,
431 fname ? fname : "<unknown>", l,
432 func_name ? func_name : "<unknown>"));
437 /* Return number of symbols in a symbol-table file. */
440 num_of_syms_in (FILE * f)
442 const int BUFSIZE = 1024;
443 char * buf = (char *) xmalloc (BUFSIZE);
444 char * address = (char *) xmalloc (BUFSIZE);
446 char * name = (char *) xmalloc (BUFSIZE);
449 while (!feof (f) && fgets (buf, BUFSIZE - 1, f))
451 if (sscanf (buf, "%s %c %s", address, &type, name) == 3)
452 if (type == 't' || type == 'T')
463 /* Read symbol table from a file. */
466 core_create_syms_from (const char * sym_table_file)
468 const int BUFSIZE = 1024;
469 char * buf = (char *) xmalloc (BUFSIZE);
470 char * address = (char *) xmalloc (BUFSIZE);
472 char * name = (char *) xmalloc (BUFSIZE);
473 bfd_vma min_vma = ~(bfd_vma) 0;
477 f = fopen (sym_table_file, "r");
480 fprintf (stderr, _("%s: could not open %s.\n"), whoami, sym_table_file);
484 /* Pass 1 - determine upper bound on number of function names. */
485 symtab.len = num_of_syms_in (f);
489 fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, sym_table_file);
493 symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym));
495 /* Pass 2 - create symbols. */
496 symtab.limit = symtab.base;
498 if (fseek (f, 0, SEEK_SET) != 0)
500 perror (sym_table_file);
504 while (!feof (f) && fgets (buf, sizeof (buf), f))
506 if (sscanf (buf, "%s %c %s", address, &type, name) == 3)
507 if (type != 't' && type != 'T')
510 sym_init (symtab.limit);
512 sscanf (address, "%" BFD_VMA_FMT "x", &(symtab.limit->addr) );
514 symtab.limit->name = (char *) xmalloc (strlen (name) + 1);
515 strcpy ((char *) symtab.limit->name, name);
516 symtab.limit->mapped = 0;
517 symtab.limit->is_func = TRUE;
518 symtab.limit->is_bb_head = TRUE;
519 symtab.limit->is_static = (type == 't');
520 min_vma = MIN (symtab.limit->addr, min_vma);
521 max_vma = MAX (symtab.limit->addr, max_vma);
527 symtab.len = symtab.limit - symtab.base;
528 symtab_finalize (&symtab);
535 /* Read in symbol table from core.
536 One symbol per function is entered. */
539 core_create_function_syms ()
541 bfd_vma min_vma = ~(bfd_vma) 0;
547 /* Pass 1 - determine upper bound on number of function names. */
550 for (i = 0; i < core_num_syms; ++i)
552 if (!core_sym_class (core_syms[i]))
555 /* This should be replaced with a binary search or hashed
558 Don't create a symtab entry for a function that has
559 a mapping to a file, unless it's the first function
562 for (j = 0; j < symbol_map_count; j++)
563 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
565 if (j > 0 && ! strcmp (symbol_map [j].file_name,
566 symbol_map [j - 1].file_name))
577 fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name);
581 symtab.base = (Sym *) xmalloc (symtab.len * sizeof (Sym));
583 /* Pass 2 - create symbols. */
584 symtab.limit = symtab.base;
586 for (i = 0; i < core_num_syms; ++i)
590 class = core_sym_class (core_syms[i]);
595 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
596 (unsigned long) core_syms[i]->value,
597 core_syms[i]->name));
601 /* This should be replaced with a binary search or hashed
606 for (j = 0; j < symbol_map_count; j++)
607 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
609 if (j > 0 && ! strcmp (symbol_map [j].file_name,
610 symbol_map [j - 1].file_name))
620 sym_init (symtab.limit);
622 /* Symbol offsets are always section-relative. */
623 sym_sec = core_syms[i]->section;
624 symtab.limit->addr = core_syms[i]->value;
626 symtab.limit->addr += bfd_get_section_vma (sym_sec->owner, sym_sec);
629 && !strcmp (core_syms[i]->name, symbol_map[found].function_name))
631 symtab.limit->name = symbol_map[found].file_name;
632 symtab.limit->mapped = 1;
636 symtab.limit->name = core_syms[i]->name;
637 symtab.limit->mapped = 0;
640 /* Lookup filename and line number, if we can. */
642 const char *filename, *func_name;
644 if (get_src_info (symtab.limit->addr, &filename, &func_name,
645 &symtab.limit->line_num))
647 symtab.limit->file = source_file_lookup_path (filename);
649 /* FIXME: Checking __osf__ here does not work with a cross
652 /* Suppress symbols that are not function names. This is
653 useful to suppress code-labels and aliases.
655 This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
656 labels do not appear in the symbol table info, so this isn't
659 if (strcmp (symtab.limit->name, func_name) != 0)
661 /* The symbol's address maps to a different name, so
662 it can't be a function-entry point. This happens
663 for labels, for example. */
665 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
666 symtab.limit->name, func_name));
673 symtab.limit->is_func = (core_syms[i]->flags & BSF_FUNCTION) != 0;
674 symtab.limit->is_bb_head = TRUE;
677 symtab.limit->is_static = TRUE;
679 /* Keep track of the minimum and maximum vma addresses used by all
680 symbols. When computing the max_vma, use the ending address of the
681 section containing the symbol, if available. */
682 min_vma = MIN (symtab.limit->addr, min_vma);
684 max_vma = MAX (bfd_get_section_vma (sym_sec->owner, sym_sec)
685 + bfd_section_size (sym_sec->owner, sym_sec) - 1,
688 max_vma = MAX (symtab.limit->addr, max_vma);
690 DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
691 (long) (symtab.limit - symtab.base),
693 (unsigned long) symtab.limit->addr));
697 symtab.len = symtab.limit - symtab.base;
698 symtab_finalize (&symtab);
701 /* Read in symbol table from core.
702 One symbol per line of source code is entered. */
705 core_create_line_syms ()
707 char *prev_name, *prev_filename;
708 unsigned int prev_name_len, prev_filename_len;
709 bfd_vma vma, min_vma = ~(bfd_vma) 0, max_vma = 0;
710 Sym *prev, dummy, *sym;
711 const char *filename;
716 /* Create symbols for functions as usual. This is necessary in
717 cases where parts of a program were not compiled with -g. For
718 those parts we still want to get info at the function level. */
719 core_create_function_syms ();
721 /* Pass 1: count the number of symbols. */
723 /* To find all line information, walk through all possible
724 text-space addresses (one by one!) and get the debugging
725 info for each address. When the debugging info changes,
726 it is time to create a new symbol.
728 Of course, this is rather slow and it would be better if
729 BFD would provide an iterator for enumerating all line infos. */
730 prev_name_len = PATH_MAX;
731 prev_filename_len = PATH_MAX;
732 prev_name = xmalloc (prev_name_len);
733 prev_filename = xmalloc (prev_filename_len);
737 vma_high = core_text_sect->vma + bfd_get_section_size (core_text_sect);
738 for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size)
742 if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
743 || (prev_line_num == dummy.line_num
745 && strcmp (prev_name, dummy.name) == 0
746 && strcmp (prev_filename, filename) == 0))
750 prev_line_num = dummy.line_num;
752 len = strlen (dummy.name);
753 if (len >= prev_name_len)
755 prev_name_len = len + 1024;
757 prev_name = xmalloc (prev_name_len);
760 strcpy (prev_name, dummy.name);
761 len = strlen (filename);
763 if (len >= prev_filename_len)
765 prev_filename_len = len + 1024;
766 free (prev_filename);
767 prev_filename = xmalloc (prev_filename_len);
770 strcpy (prev_filename, filename);
772 min_vma = MIN (vma, min_vma);
773 max_vma = MAX (vma, max_vma);
777 free (prev_filename);
779 /* Make room for function symbols, too. */
780 ltab.len += symtab.len;
781 ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
782 ltab.limit = ltab.base;
784 /* Pass 2 - create symbols. */
786 /* We now set is_static as we go along, rather than by running
787 through the symbol table at the end.
789 The old way called symtab_finalize before the is_static pass,
790 causing a problem since symtab_finalize uses is_static as part of
791 its address conflict resolution algorithm. Since global symbols
792 were prefered over static symbols, and all line symbols were
793 global at that point, static function names that conflicted with
794 their own line numbers (static, but labeled as global) were
795 rejected in favor of the line num.
797 This was not the desired functionality. We always want to keep
798 our function symbols and discard any conflicting line symbols.
799 Perhaps symtab_finalize should be modified to make this
800 distinction as well, but the current fix works and the code is a
804 for (vma = core_text_sect->vma; vma < vma_high; vma += min_insn_size)
806 sym_init (ltab.limit);
808 if (!get_src_info (vma, &filename, <ab.limit->name, <ab.limit->line_num)
809 || (prev && prev->line_num == ltab.limit->line_num
810 && strcmp (prev->name, ltab.limit->name) == 0
811 && strcmp (prev->file->name, filename) == 0))
814 /* Make name pointer a malloc'ed string. */
815 ltab.limit->name = xstrdup (ltab.limit->name);
816 ltab.limit->file = source_file_lookup_path (filename);
818 ltab.limit->addr = vma;
820 /* Set is_static based on the enclosing function, using either:
821 1) the previous symbol, if it's from the same function, or
822 2) a symtab lookup. */
823 if (prev && ltab.limit->file == prev->file &&
824 strcmp (ltab.limit->name, prev->name) == 0)
826 ltab.limit->is_static = prev->is_static;
830 sym = sym_lookup(&symtab, ltab.limit->addr);
832 ltab.limit->is_static = sym->is_static;
837 DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n",
838 (unsigned long) (ltab.limit - ltab.base),
840 (unsigned long) ltab.limit->addr));
844 /* Copy in function symbols. */
845 memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
846 ltab.limit += symtab.len;
848 if ((unsigned int) (ltab.limit - ltab.base) != ltab.len)
851 _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"),
852 whoami, ltab.len, (long) (ltab.limit - ltab.base));
856 /* Finalize ltab and make it symbol table. */
857 symtab_finalize (<ab);