9 asection
*core_text_sect
;
15 /* For mapping symbols to specific .o files during file ordering. */
21 struct function_map
*symbol_map
;
22 unsigned int symbol_map_count
;
24 extern void i386_find_call
PARAMS ((Sym
*, bfd_vma
, bfd_vma
));
25 extern void alpha_find_call
PARAMS ((Sym
*, bfd_vma
, bfd_vma
));
26 extern void vax_find_call
PARAMS ((Sym
*, bfd_vma
, bfd_vma
));
27 extern void tahoe_find_call
PARAMS ((Sym
*, bfd_vma
, bfd_vma
));
28 extern void sparc_find_call
PARAMS ((Sym
*, bfd_vma
, bfd_vma
));
31 DEFUN (read_function_mappings
, (filename
), const char *filename
)
33 FILE *file
= fopen (filename
, "r");
39 fprintf (stderr
, "%s: could not open %s.\n", whoami
, filename
);
43 /* First parse the mapping file so we know how big we need to
44 make our tables. We also do some sanity checks at this
50 matches
= fscanf (file
, "%[^\n:]", dummy
);
53 fprintf (stderr
, "%s: unable to parse mapping file %s.\n",
58 /* Just skip messages about files with no symbols. */
59 if (!strncmp (dummy
, "No symbols in ", 14))
65 /* Don't care what else is on this line at this point. */
66 fscanf (file
, "%[^\n]\n", dummy
);
70 /* Now we know how big we need to make our table. */
71 symbol_map
= ((struct function_map
*)
72 xmalloc (count
* sizeof (struct function_map
)));
74 /* Rewind the input file so we can read it again. */
77 /* Read each entry and put it into the table. */
84 matches
= fscanf (file
, "%[^\n:]", dummy
);
87 fprintf (stderr
, "%s: unable to parse mapping file %s.\n",
92 /* Just skip messages about files with no symbols. */
93 if (!strncmp (dummy
, "No symbols in ", 14))
99 /* dummy has the filename, go ahead and copy it. */
100 symbol_map
[count
].file_name
= xmalloc (strlen (dummy
) + 1);
101 strcpy (symbol_map
[count
].file_name
, dummy
);
103 /* Now we need the function name. */
104 fscanf (file
, "%[^\n]\n", dummy
);
105 tmp
= strrchr (dummy
, ' ') + 1;
106 symbol_map
[count
].function_name
= xmalloc (strlen (tmp
) + 1);
107 strcpy (symbol_map
[count
].function_name
, tmp
);
111 /* Record the size of the map table for future reference. */
112 symbol_map_count
= count
;
116 DEFUN (core_init
, (a_out_name
), const char *a_out_name
)
118 core_bfd
= bfd_openr (a_out_name
, 0);
126 if (!bfd_check_format (core_bfd
, bfd_object
))
128 fprintf (stderr
, "%s: %s: not in a.out format\n", whoami
, a_out_name
);
132 /* get core's text section: */
133 core_text_sect
= bfd_get_section_by_name (core_bfd
, ".text");
136 core_text_sect
= bfd_get_section_by_name (core_bfd
, "$CODE$");
139 fprintf (stderr
, "%s: can't find .text section in %s\n",
145 /* read core's symbol table: */
147 /* this will probably give us more than we need, but that's ok: */
148 core_num_syms
= bfd_get_symtab_upper_bound (core_bfd
);
149 if (core_num_syms
< 0)
151 fprintf (stderr
, "%s: %s: %s\n", whoami
, a_out_name
,
152 bfd_errmsg (bfd_get_error ()));
156 core_syms
= (asymbol
**) xmalloc (core_num_syms
);
157 core_num_syms
= bfd_canonicalize_symtab (core_bfd
, core_syms
);
158 if (core_num_syms
< 0)
160 fprintf (stderr
, "%s: %s: %s\n", whoami
, a_out_name
,
161 bfd_errmsg (bfd_get_error ()));
168 switch (bfd_get_arch (core_bfd
))
183 if (function_mapping_file
)
184 read_function_mappings (function_mapping_file
);
189 * Read in the text space of an a.out file
192 DEFUN (core_get_text_space
, (core_bfd
), bfd
* core_bfd
)
194 core_text_space
= (PTR
) malloc (core_text_sect
->_raw_size
);
196 if (!core_text_space
)
198 fprintf (stderr
, "%s: ran out room for %ld bytes of text space\n",
199 whoami
, core_text_sect
->_raw_size
);
202 if (!bfd_get_section_contents (core_bfd
, core_text_sect
, core_text_space
,
203 0, core_text_sect
->_raw_size
))
205 bfd_perror ("bfd_get_section_contents");
206 free (core_text_space
);
209 if (!core_text_space
)
211 fprintf (stderr
, "%s: can't do -c\n", whoami
);
217 DEFUN (find_call
, (parent
, p_lowpc
, p_highpc
),
218 Sym
* parent AND bfd_vma p_lowpc AND bfd_vma p_highpc
)
220 switch (bfd_get_arch (core_bfd
))
223 i386_find_call (parent
, p_lowpc
, p_highpc
);
227 alpha_find_call (parent
, p_lowpc
, p_highpc
);
231 vax_find_call (parent
, p_lowpc
, p_highpc
);
235 sparc_find_call (parent
, p_lowpc
, p_highpc
);
239 tahoe_find_call (parent
, p_lowpc
, p_highpc
);
243 fprintf (stderr
, "%s: -c not supported on architecture %s\n",
244 whoami
, bfd_printable_name(core_bfd
));
246 /* Don't give the error more than once. */
247 ignore_direct_calls
= FALSE
;
252 * Return class of symbol SYM. The returned class can be any of:
253 * 0 -> symbol is not interesting to us
254 * 'T' -> symbol is a global name
255 * 't' -> symbol is a local (static) name
258 DEFUN (core_sym_class
, (sym
), asymbol
* sym
)
265 if (sym
->section
== NULL
|| (sym
->flags
& BSF_DEBUGGING
) != 0)
271 * Must be a text symbol, and static text symbols don't qualify if
272 * ignore_static_funcs set.
274 if (ignore_static_funcs
&& (sym
->flags
& BSF_LOCAL
))
276 DBG (AOUTDEBUG
, printf ("[core_sym_class] %s: not a function\n",
281 bfd_get_symbol_info (core_bfd
, sym
, &syminfo
);
286 return i
; /* it's a global symbol */
291 /* Treat weak symbols as text symbols. FIXME: a weak symbol may
292 also be a data symbol. */
298 /* not a static text symbol */
299 DBG (AOUTDEBUG
, printf ("[core_sym_class] %s is of class %c\n",
304 /* do some more filtering on static function-names: */
306 if (ignore_static_funcs
)
311 * Can't zero-length name or funny characters in name, where
312 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
314 if (!sym
->name
|| sym
->name
[0] == '\0')
319 for (name
= sym
->name
; *name
; ++name
)
321 if (*name
== '.' || *name
== '$')
327 * On systems where the C compiler adds an underscore to all
328 * names, static names without underscores seem usually to be
329 * labels in hand written assembler in the library. We don't want
330 * these names. This is certainly necessary on a Sparc running
331 * SunOS 4.1 (try profiling a program that does a lot of
332 * division). I don't know whether it has harmful side effects on
333 * other systems. Perhaps it should be made configurable.
335 sym_prefix
= bfd_get_symbol_leading_char (core_bfd
);
336 if ((sym_prefix
&& sym_prefix
!= sym
->name
[0])
338 * GCC may add special symbols to help gdb figure out the file
339 * language. We want to ignore these, since sometimes they mask
340 * the real function. (dj@ctron)
342 || !strncmp (sym
->name
, "__gnu_compiled", 14)
343 || !strncmp (sym
->name
, "___gnu_compiled", 15))
348 /* If the object file supports marking of function symbols, then we can
349 zap anything that doesn't have BSF_FUNCTION set. */
350 if (ignore_non_functions
&& (sym
->flags
& BSF_FUNCTION
) == 0)
353 return 't'; /* it's a static text symbol */
358 * Get whatever source info we can get regarding address ADDR:
361 DEFUN (get_src_info
, (addr
, filename
, name
, line_num
),
362 bfd_vma addr AND
const char **filename AND
const char **name
365 const char *fname
= 0, *func_name
= 0;
368 if (bfd_find_nearest_line (core_bfd
, core_text_sect
, core_syms
,
369 addr
- core_text_sect
->vma
,
370 &fname
, &func_name
, (unsigned int *) &l
)
371 && fname
&& func_name
&& l
)
373 DBG (AOUTDEBUG
, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
374 addr
, fname
, l
, func_name
));
382 DBG (AOUTDEBUG
, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
383 (long) addr
, fname
? fname
: "<unknown>", l
,
384 func_name
? func_name
: "<unknown>"));
391 * Read in symbol table from core. One symbol per function is
395 DEFUN (core_create_function_syms
, (core_bfd
), bfd
* core_bfd
)
397 bfd_vma min_vma
= ~0, max_vma
= 0;
402 /* pass 1 - determine upper bound on number of function names: */
404 for (i
= 0; i
< core_num_syms
; ++i
)
406 if (!core_sym_class (core_syms
[i
]))
411 /* This should be replaced with a binary search or hashed
414 Don't create a symtab entry for a function that has
415 a mapping to a file, unless it's the first function
418 for (j
= 0; j
< symbol_map_count
; j
++)
419 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
421 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
422 symbol_map
[j
- 1].file_name
))
432 fprintf (stderr
, "%s: file `%s' has no symbols\n", whoami
, a_out_name
);
436 /* the "+ 2" is for the sentinels: */
437 symtab
.base
= (Sym
*) xmalloc ((symtab
.len
+ 2) * sizeof (Sym
));
439 /* pass 2 - create symbols: */
441 symtab
.limit
= symtab
.base
;
442 for (i
= 0; i
< core_num_syms
; ++i
)
444 class = core_sym_class (core_syms
[i
]);
448 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
449 core_syms
[i
]->value
, core_syms
[i
]->name
));
452 /* This should be replaced with a binary search or hashed
457 for (j
= 0; j
< symbol_map_count
; j
++)
458 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
460 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
461 symbol_map
[j
- 1].file_name
))
471 sym_init (symtab
.limit
);
473 /* symbol offsets are always section-relative: */
475 symtab
.limit
->addr
= core_syms
[i
]->value
+ core_syms
[i
]->section
->vma
;
477 && !strcmp (core_syms
[i
]->name
, symbol_map
[found
].function_name
))
479 symtab
.limit
->name
= symbol_map
[found
].file_name
;
480 symtab
.limit
->mapped
= 1;
484 symtab
.limit
->name
= core_syms
[i
]->name
;
485 symtab
.limit
->mapped
= 0;
488 /* Lookup filename and line number, if we can */
491 const char *filename
, *func_name
;
493 if (get_src_info (symtab
.limit
->addr
, &filename
, &func_name
,
494 &symtab
.limit
->line_num
))
496 symtab
.limit
->file
= source_file_lookup_path (filename
);
498 /* FIXME: Checking __osf__ here does not work with a cross
502 * Suppress symbols that are not function names. This is
503 * useful to suppress code-labels and aliases.
505 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
506 * labels do not appear in the symbol table info, so this isn't
510 if (strcmp (symtab
.limit
->name
, func_name
) != 0)
513 * The symbol's address maps to a different name, so
514 * it can't be a function-entry point. This happens
515 * for labels, for example.
518 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
519 symtab
.limit
->name
, func_name
));
526 symtab
.limit
->is_func
= TRUE
;
527 symtab
.limit
->is_bb_head
= TRUE
;
530 symtab
.limit
->is_static
= TRUE
;
533 min_vma
= MIN (symtab
.limit
->addr
, min_vma
);
534 max_vma
= MAX (symtab
.limit
->addr
, max_vma
);
537 * If we see "main" without an initial '_', we assume names
538 * are *not* prefixed by '_'.
540 if (symtab
.limit
->name
[0] == 'm' && discard_underscores
541 && strcmp (symtab
.limit
->name
, "main") == 0)
543 discard_underscores
= 0;
546 DBG (AOUTDEBUG
, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
547 (long) (symtab
.limit
- symtab
.base
),
548 symtab
.limit
->name
, symtab
.limit
->addr
));
552 /* create sentinels: */
554 sym_init (symtab
.limit
);
555 symtab
.limit
->name
= "<locore>";
556 symtab
.limit
->addr
= 0;
557 symtab
.limit
->end_addr
= min_vma
- 1;
560 sym_init (symtab
.limit
);
561 symtab
.limit
->name
= "<hicore>";
562 symtab
.limit
->addr
= max_vma
+ 1;
563 symtab
.limit
->end_addr
= ~0;
566 symtab
.len
= symtab
.limit
- symtab
.base
;
567 symtab_finalize (&symtab
);
572 * Read in symbol table from core. One symbol per line of source code
576 DEFUN (core_create_line_syms
, (core_bfd
), bfd
* core_bfd
)
578 char prev_name
[PATH_MAX
], prev_filename
[PATH_MAX
];
579 bfd_vma vma
, min_vma
= ~0, max_vma
= 0;
581 Sym
*prev
, dummy
, *sentinel
, *sym
;
582 const char *filename
;
586 * Create symbols for functions as usual. This is necessary in
587 * cases where parts of a program were not compiled with -g. For
588 * those parts we still want to get info at the function level:
590 core_create_function_syms (core_bfd
);
592 /* pass 1 - counter number of symbols: */
595 * To find all line information, walk through all possible
596 * text-space addresses (one by one!) and get the debugging
597 * info for each address. When the debugging info changes,
598 * it is time to create a new symbol.
600 * Of course, this is rather slow and it would be better if
601 * bfd would provide an iterator for enumerating all line infos
605 prev_filename
[0] = '\0';
607 for (offset
= 0; offset
< core_text_sect
->_raw_size
; offset
+= min_insn_size
)
609 vma
= core_text_sect
->vma
+ offset
;
610 if (!get_src_info (vma
, &filename
, &dummy
.name
, &dummy
.line_num
)
611 || (prev_line_num
== dummy
.line_num
&&
612 strcmp (prev_name
, dummy
.name
) == 0
613 && strcmp (prev_filename
, filename
) == 0))
619 prev_line_num
= dummy
.line_num
;
620 strcpy (prev_name
, dummy
.name
);
621 strcpy (prev_filename
, filename
);
623 min_vma
= MIN (vma
, min_vma
);
624 max_vma
= MAX (vma
, max_vma
);
627 /* make room for function symbols, too: */
628 ltab
.len
+= symtab
.len
;
629 ltab
.base
= (Sym
*) xmalloc (ltab
.len
* sizeof (Sym
));
630 ltab
.limit
= ltab
.base
;
632 /* pass 2 - create symbols: */
634 /* We now set is_static as we go along, rather than by running
635 through the symbol table at the end.
637 The old way called symtab_finalize before the is_static pass,
638 causing a problem since symtab_finalize uses is_static as part of
639 its address conflict resolution algorithm. Since global symbols
640 were prefered over static symbols, and all line symbols were
641 global at that point, static function names that conflicted with
642 their own line numbers (static, but labeled as global) were
643 rejected in favor of the line num.
645 This was not the desired functionality. We always want to keep
646 our function symbols and discard any conflicting line symbols.
647 Perhaps symtab_finalize should be modified to make this
648 distinction as well, but the current fix works and the code is a
652 for (offset
= 0; offset
< core_text_sect
->_raw_size
; offset
+= min_insn_size
)
654 sym_init (ltab
.limit
);
655 if (!get_src_info (core_text_sect
->vma
+ offset
, &filename
,
656 <ab
.limit
->name
, <ab
.limit
->line_num
)
657 || (prev
&& prev
->line_num
== ltab
.limit
->line_num
658 && strcmp (prev
->name
, ltab
.limit
->name
) == 0
659 && strcmp (prev
->file
->name
, filename
) == 0))
664 /* make name pointer a malloc'ed string: */
665 ltab
.limit
->name
= xstrdup (ltab
.limit
->name
);
666 ltab
.limit
->file
= source_file_lookup_path (filename
);
668 ltab
.limit
->addr
= core_text_sect
->vma
+ offset
;
670 /* Set is_static based on the enclosing function, using either:
671 * 1) the previous symbol, if it's from the same function, or
675 if (prev
&& ltab
.limit
->file
== prev
->file
&&
676 strcmp (ltab
.limit
->name
, prev
->name
) == 0)
678 ltab
.limit
->is_static
= prev
->is_static
;
682 sym
= sym_lookup(&symtab
, ltab
.limit
->addr
);
683 ltab
.limit
->is_static
= sym
->is_static
;
689 * If we see "main" without an initial '_', we assume names
690 * are *not* prefixed by '_'.
692 if (ltab
.limit
->name
[0] == 'm' && discard_underscores
693 && strcmp (ltab
.limit
->name
, "main") == 0)
695 discard_underscores
= 0;
698 DBG (AOUTDEBUG
, printf ("[core_create_line_syms] %d %s 0x%lx\n",
699 ltab
.limit
- ltab
.base
, ltab
.limit
->name
,
704 /* update sentinels: */
706 sentinel
= sym_lookup (&symtab
, 0);
707 if (strcmp (sentinel
->name
, "<locore>") == 0
708 && min_vma
<= sentinel
->end_addr
)
710 sentinel
->end_addr
= min_vma
- 1;
713 sentinel
= sym_lookup (&symtab
, ~0);
714 if (strcmp (sentinel
->name
, "<hicore>") == 0 && max_vma
>= sentinel
->addr
)
716 sentinel
->addr
= max_vma
+ 1;
719 /* copy in function symbols: */
720 memcpy (ltab
.limit
, symtab
.base
, symtab
.len
* sizeof (Sym
));
721 ltab
.limit
+= symtab
.len
;
723 if ((unsigned int) (ltab
.limit
- ltab
.base
) != ltab
.len
)
726 "%s: somebody miscounted: ltab.len=%d instead of %ld\n",
727 whoami
, ltab
.len
, (long) (ltab
.limit
- ltab
.base
));
731 /* finalize ltab and make it symbol table: */
733 symtab_finalize (<ab
);