3 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
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
;
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 /* Read in symbol table from core.
438 One symbol per function is entered. */
441 core_create_function_syms ()
443 bfd_vma min_vma
= ~(bfd_vma
) 0;
449 /* Pass 1 - determine upper bound on number of function names. */
452 for (i
= 0; i
< core_num_syms
; ++i
)
454 if (!core_sym_class (core_syms
[i
]))
457 /* This should be replaced with a binary search or hashed
460 Don't create a symtab entry for a function that has
461 a mapping to a file, unless it's the first function
464 for (j
= 0; j
< symbol_map_count
; j
++)
465 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
467 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
468 symbol_map
[j
- 1].file_name
))
479 fprintf (stderr
, _("%s: file `%s' has no symbols\n"), whoami
, a_out_name
);
483 /* The "+ 2" is for the sentinels. */
484 symtab
.base
= (Sym
*) xmalloc ((symtab
.len
+ 2) * sizeof (Sym
));
486 /* Pass 2 - create symbols. */
487 symtab
.limit
= symtab
.base
;
489 for (i
= 0; i
< core_num_syms
; ++i
)
493 class = core_sym_class (core_syms
[i
]);
498 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
499 (unsigned long) core_syms
[i
]->value
,
500 core_syms
[i
]->name
));
504 /* This should be replaced with a binary search or hashed
509 for (j
= 0; j
< symbol_map_count
; j
++)
510 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
512 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
513 symbol_map
[j
- 1].file_name
))
523 sym_init (symtab
.limit
);
525 /* Symbol offsets are always section-relative. */
526 sym_sec
= core_syms
[i
]->section
;
527 symtab
.limit
->addr
= core_syms
[i
]->value
;
529 symtab
.limit
->addr
+= bfd_get_section_vma (sym_sec
->owner
, sym_sec
);
532 && !strcmp (core_syms
[i
]->name
, symbol_map
[found
].function_name
))
534 symtab
.limit
->name
= symbol_map
[found
].file_name
;
535 symtab
.limit
->mapped
= 1;
539 symtab
.limit
->name
= core_syms
[i
]->name
;
540 symtab
.limit
->mapped
= 0;
543 /* Lookup filename and line number, if we can. */
545 const char *filename
, *func_name
;
547 if (get_src_info (symtab
.limit
->addr
, &filename
, &func_name
,
548 &symtab
.limit
->line_num
))
550 symtab
.limit
->file
= source_file_lookup_path (filename
);
552 /* FIXME: Checking __osf__ here does not work with a cross
555 /* Suppress symbols that are not function names. This is
556 useful to suppress code-labels and aliases.
558 This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
559 labels do not appear in the symbol table info, so this isn't
562 if (strcmp (symtab
.limit
->name
, func_name
) != 0)
564 /* The symbol's address maps to a different name, so
565 it can't be a function-entry point. This happens
566 for labels, for example. */
568 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
569 symtab
.limit
->name
, func_name
));
576 symtab
.limit
->is_func
= TRUE
;
577 symtab
.limit
->is_bb_head
= TRUE
;
580 symtab
.limit
->is_static
= TRUE
;
582 /* Keep track of the minimum and maximum vma addresses used by all
583 symbols. When computing the max_vma, use the ending address of the
584 section containing the symbol, if available. */
585 min_vma
= MIN (symtab
.limit
->addr
, min_vma
);
587 max_vma
= MAX (bfd_get_section_vma (sym_sec
->owner
, sym_sec
)
588 + bfd_section_size (sym_sec
->owner
, sym_sec
) - 1,
591 max_vma
= MAX (symtab
.limit
->addr
, max_vma
);
593 DBG (AOUTDEBUG
, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
594 (long) (symtab
.limit
- symtab
.base
),
596 (unsigned long) symtab
.limit
->addr
));
600 /* Create sentinels. */
601 sym_init (symtab
.limit
);
602 symtab
.limit
->name
= "<locore>";
603 symtab
.limit
->addr
= 0;
604 symtab
.limit
->end_addr
= min_vma
- 1;
607 sym_init (symtab
.limit
);
608 symtab
.limit
->name
= "<hicore>";
609 symtab
.limit
->addr
= max_vma
+ 1;
610 symtab
.limit
->end_addr
= ~(bfd_vma
) 0;
613 symtab
.len
= symtab
.limit
- symtab
.base
;
614 symtab_finalize (&symtab
);
617 /* Read in symbol table from core.
618 One symbol per line of source code is entered. */
621 core_create_line_syms ()
623 char *prev_name
, *prev_filename
;
624 unsigned int prev_name_len
, prev_filename_len
;
625 bfd_vma vma
, min_vma
= ~(bfd_vma
) 0, max_vma
= 0;
626 Sym
*prev
, dummy
, *sentinel
, *sym
;
627 const char *filename
;
632 /* Create symbols for functions as usual. This is necessary in
633 cases where parts of a program were not compiled with -g. For
634 those parts we still want to get info at the function level. */
635 core_create_function_syms ();
637 /* Pass 1: count the number of symbols. */
639 /* To find all line information, walk through all possible
640 text-space addresses (one by one!) and get the debugging
641 info for each address. When the debugging info changes,
642 it is time to create a new symbol.
644 Of course, this is rather slow and it would be better if
645 BFD would provide an iterator for enumerating all line infos. */
646 prev_name_len
= PATH_MAX
;
647 prev_filename_len
= PATH_MAX
;
648 prev_name
= xmalloc (prev_name_len
);
649 prev_filename
= xmalloc (prev_filename_len
);
653 vma_high
= core_text_sect
->vma
+ bfd_get_section_size (core_text_sect
);
654 for (vma
= core_text_sect
->vma
; vma
< vma_high
; vma
+= min_insn_size
)
658 if (!get_src_info (vma
, &filename
, &dummy
.name
, &dummy
.line_num
)
659 || (prev_line_num
== dummy
.line_num
661 && strcmp (prev_name
, dummy
.name
) == 0
662 && strcmp (prev_filename
, filename
) == 0))
666 prev_line_num
= dummy
.line_num
;
668 len
= strlen (dummy
.name
);
669 if (len
>= prev_name_len
)
671 prev_name_len
= len
+ 1024;
673 prev_name
= xmalloc (prev_name_len
);
676 strcpy (prev_name
, dummy
.name
);
677 len
= strlen (filename
);
679 if (len
>= prev_filename_len
)
681 prev_filename_len
= len
+ 1024;
682 free (prev_filename
);
683 prev_filename
= xmalloc (prev_filename_len
);
686 strcpy (prev_filename
, filename
);
688 min_vma
= MIN (vma
, min_vma
);
689 max_vma
= MAX (vma
, max_vma
);
693 free (prev_filename
);
695 /* Make room for function symbols, too. */
696 ltab
.len
+= symtab
.len
;
697 ltab
.base
= (Sym
*) xmalloc (ltab
.len
* sizeof (Sym
));
698 ltab
.limit
= ltab
.base
;
700 /* Pass 2 - create symbols. */
702 /* We now set is_static as we go along, rather than by running
703 through the symbol table at the end.
705 The old way called symtab_finalize before the is_static pass,
706 causing a problem since symtab_finalize uses is_static as part of
707 its address conflict resolution algorithm. Since global symbols
708 were prefered over static symbols, and all line symbols were
709 global at that point, static function names that conflicted with
710 their own line numbers (static, but labeled as global) were
711 rejected in favor of the line num.
713 This was not the desired functionality. We always want to keep
714 our function symbols and discard any conflicting line symbols.
715 Perhaps symtab_finalize should be modified to make this
716 distinction as well, but the current fix works and the code is a
720 for (vma
= core_text_sect
->vma
; vma
< vma_high
; vma
+= min_insn_size
)
722 sym_init (ltab
.limit
);
724 if (!get_src_info (vma
, &filename
, <ab
.limit
->name
, <ab
.limit
->line_num
)
725 || (prev
&& prev
->line_num
== ltab
.limit
->line_num
726 && strcmp (prev
->name
, ltab
.limit
->name
) == 0
727 && strcmp (prev
->file
->name
, filename
) == 0))
730 /* Make name pointer a malloc'ed string. */
731 ltab
.limit
->name
= xstrdup (ltab
.limit
->name
);
732 ltab
.limit
->file
= source_file_lookup_path (filename
);
734 ltab
.limit
->addr
= vma
;
736 /* Set is_static based on the enclosing function, using either:
737 1) the previous symbol, if it's from the same function, or
738 2) a symtab lookup. */
739 if (prev
&& ltab
.limit
->file
== prev
->file
&&
740 strcmp (ltab
.limit
->name
, prev
->name
) == 0)
742 ltab
.limit
->is_static
= prev
->is_static
;
746 sym
= sym_lookup(&symtab
, ltab
.limit
->addr
);
747 ltab
.limit
->is_static
= sym
->is_static
;
752 DBG (AOUTDEBUG
, printf ("[core_create_line_syms] %lu %s 0x%lx\n",
753 (unsigned long) (ltab
.limit
- ltab
.base
),
755 (unsigned long) ltab
.limit
->addr
));
759 /* Update sentinels. */
760 sentinel
= sym_lookup (&symtab
, (bfd_vma
) 0);
763 && strcmp (sentinel
->name
, "<locore>") == 0
764 && min_vma
<= sentinel
->end_addr
)
765 sentinel
->end_addr
= min_vma
- 1;
767 sentinel
= sym_lookup (&symtab
, ~(bfd_vma
) 0);
770 && strcmp (sentinel
->name
, "<hicore>") == 0
771 && max_vma
>= sentinel
->addr
)
772 sentinel
->addr
= max_vma
+ 1;
774 /* Copy in function symbols. */
775 memcpy (ltab
.limit
, symtab
.base
, symtab
.len
* sizeof (Sym
));
776 ltab
.limit
+= symtab
.len
;
778 if ((unsigned int) (ltab
.limit
- ltab
.base
) != ltab
.len
)
781 _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"),
782 whoami
, ltab
.len
, (long) (ltab
.limit
- ltab
.base
));
786 /* Finalize ltab and make it symbol table. */
787 symtab_finalize (<ab
);
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