7 /* If not defined in MACHINE_H, assume smallest instruction is 1 byte
8 long. THis is safe but may be needlessly slow on machines where
9 all instructions are longer. */
10 #define MIN_INSN_SIZE 1
16 asection
*core_text_sect
;
19 /* For mapping symbols to specific .o files during file ordering. */
25 struct function_map
*symbol_map
;
29 DEFUN (read_function_mappings
, (filename
), const char *filename
)
31 FILE *file
= fopen (filename
, "r");
37 fprintf (stderr
, "%s: could not open %s.\n", whoami
, filename
);
41 /* First parse the mapping file so we know how big we need to
42 make our tables. We also do some sanity checks at this
48 matches
= fscanf (file
, "%[^\n:]", dummy
);
51 fprintf (stderr
, "%s: unable to parse mapping file %s.\n",
56 /* Just skip messages about files with no symbols. */
57 if (!strncmp (dummy
, "No symbols in ", 14))
63 /* Don't care what else is on this line at this point. */
64 fscanf (file
, "%[^\n]\n", dummy
);
68 /* Now we know how big we need to make our table. */
69 symbol_map
= ((struct function_map
*)
70 xmalloc (count
* sizeof (struct function_map
)));
72 /* Rewind the input file so we can read it again. */
75 /* Read each entry and put it into the table. */
82 matches
= fscanf (file
, "%[^\n:]", dummy
);
85 fprintf (stderr
, "%s: unable to parse mapping file %s.\n",
90 /* Just skip messages about files with no symbols. */
91 if (!strncmp (dummy
, "No symbols in ", 14))
97 /* dummy has the filename, go ahead and copy it. */
98 symbol_map
[count
].file_name
= xmalloc (strlen (dummy
) + 1);
99 strcpy (symbol_map
[count
].file_name
, dummy
);
101 /* Now we need the function name. */
102 fscanf (file
, "%[^\n]\n", dummy
);
103 tmp
= strrchr (dummy
, ' ') + 1;
104 symbol_map
[count
].function_name
= xmalloc (strlen (tmp
) + 1);
105 strcpy (symbol_map
[count
].function_name
, tmp
);
109 /* Record the size of the map table for future reference. */
110 symbol_map_count
= count
;
114 DEFUN (core_init
, (a_out_name
), const char *a_out_name
)
116 core_bfd
= bfd_openr (a_out_name
, 0);
124 if (!bfd_check_format (core_bfd
, bfd_object
))
126 fprintf (stderr
, "%s: %s: not in a.out format\n", whoami
, a_out_name
);
130 /* get core's text section: */
131 core_text_sect
= bfd_get_section_by_name (core_bfd
, ".text");
134 core_text_sect
= bfd_get_section_by_name (core_bfd
, "$CODE$");
137 fprintf (stderr
, "%s: can't find .text section in %s\n",
143 /* read core's symbol table: */
145 /* this will probably give us more than we need, but that's ok: */
146 core_num_syms
= bfd_get_symtab_upper_bound (core_bfd
);
147 if (core_num_syms
< 0)
149 fprintf (stderr
, "%s: %s: %s\n", whoami
, a_out_name
,
150 bfd_errmsg (bfd_get_error ()));
154 core_syms
= (asymbol
**) xmalloc (core_num_syms
);
155 core_num_syms
= bfd_canonicalize_symtab (core_bfd
, core_syms
);
156 if (core_num_syms
< 0)
158 fprintf (stderr
, "%s: %s: %s\n", whoami
, a_out_name
,
159 bfd_errmsg (bfd_get_error ()));
163 if (function_mapping_file
)
164 read_function_mappings (function_mapping_file
);
169 * Read in the text space of an a.out file
172 DEFUN (core_get_text_space
, (core_bfd
), bfd
* core_bfd
)
174 core_text_space
= (PTR
) malloc (core_text_sect
->_raw_size
);
176 if (!core_text_space
)
178 fprintf (stderr
, "%s: ran out room for %ld bytes of text space\n",
179 whoami
, core_text_sect
->_raw_size
);
182 if (!bfd_get_section_contents (core_bfd
, core_text_sect
, core_text_space
,
183 0, core_text_sect
->_raw_size
))
185 bfd_perror ("bfd_get_section_contents");
186 free (core_text_space
);
189 if (!core_text_space
)
191 fprintf (stderr
, "%s: can't do -c\n", whoami
);
197 * Return class of symbol SYM. The returned class can be any of:
198 * 0 -> symbol is not interesting to us
199 * 'T' -> symbol is a global name
200 * 't' -> symbol is a local (static) name
203 DEFUN (core_sym_class
, (sym
), asymbol
* sym
)
210 if (sym
->section
== NULL
|| (sym
->flags
& BSF_DEBUGGING
) != 0)
216 * Must be a text symbol, and static text symbols don't qualify if
217 * ignore_static_funcs set.
219 if (ignore_static_funcs
&& (sym
->flags
& BSF_LOCAL
))
221 DBG (AOUTDEBUG
, printf ("[core_sym_class] %s: not a function\n",
226 bfd_get_symbol_info (core_bfd
, sym
, &syminfo
);
231 return i
; /* it's a global symbol */
236 /* Treat weak symbols as text symbols. FIXME: a weak symbol may
237 also be a data symbol. */
243 /* not a static text symbol */
244 DBG (AOUTDEBUG
, printf ("[core_sym_class] %s is of class %c\n",
249 /* do some more filtering on static function-names: */
251 if (ignore_static_funcs
)
256 * Can't zero-length name or funny characters in name, where
257 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
259 if (!sym
->name
|| sym
->name
[0] == '\0')
264 for (name
= sym
->name
; *name
; ++name
)
266 if (*name
== '.' || *name
== '$')
272 * On systems where the C compiler adds an underscore to all
273 * names, static names without underscores seem usually to be
274 * labels in hand written assembler in the library. We don't want
275 * these names. This is certainly necessary on a Sparc running
276 * SunOS 4.1 (try profiling a program that does a lot of
277 * division). I don't know whether it has harmful side effects on
278 * other systems. Perhaps it should be made configurable.
280 sym_prefix
= bfd_get_symbol_leading_char (core_bfd
);
281 if ((sym_prefix
&& sym_prefix
!= sym
->name
[0])
283 * GCC may add special symbols to help gdb figure out the file
284 * language. We want to ignore these, since sometimes they mask
285 * the real function. (dj@ctron)
287 || !strncmp (sym
->name
, "__gnu_compiled", 14)
288 || !strncmp (sym
->name
, "___gnu_compiled", 15))
293 /* If the object file supports marking of function symbols, then we can
294 zap anything that doesn't have BSF_FUNCTION set. */
295 if (ignore_non_functions
&& (sym
->flags
& BSF_FUNCTION
) == 0)
298 return 't'; /* it's a static text symbol */
303 * Get whatever source info we can get regarding address ADDR:
306 DEFUN (get_src_info
, (addr
, filename
, name
, line_num
),
307 bfd_vma addr AND
const char **filename AND
const char **name
310 const char *fname
= 0, *func_name
= 0;
313 if (bfd_find_nearest_line (core_bfd
, core_text_sect
, core_syms
,
314 addr
- core_text_sect
->vma
,
315 &fname
, &func_name
, (unsigned int *) &l
)
316 && fname
&& func_name
&& l
)
318 DBG (AOUTDEBUG
, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
319 addr
, fname
, l
, func_name
));
327 DBG (AOUTDEBUG
, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
328 (long) addr
, fname
? fname
: "<unknown>", l
,
329 func_name
? func_name
: "<unknown>"));
336 * Read in symbol table from core. One symbol per function is
340 DEFUN (core_create_function_syms
, (core_bfd
), bfd
* core_bfd
)
342 bfd_vma min_vma
= ~0, max_vma
= 0;
344 long i
, j
, found
, skip
;
346 /* pass 1 - determine upper bound on number of function names: */
348 for (i
= 0; i
< core_num_syms
; ++i
)
350 if (!core_sym_class (core_syms
[i
]))
355 /* This should be replaced with a binary search or hashed
358 Don't create a symtab entry for a function that has
359 a mapping to a file, unless it's the first function
362 for (j
= 0; j
< symbol_map_count
; j
++)
363 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
365 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
366 symbol_map
[j
- 1].file_name
))
376 fprintf (stderr
, "%s: file `%s' has no symbols\n", whoami
, a_out_name
);
380 /* the "+ 2" is for the sentinels: */
381 symtab
.base
= (Sym
*) xmalloc ((symtab
.len
+ 2) * sizeof (Sym
));
383 /* pass 2 - create symbols: */
385 symtab
.limit
= symtab
.base
;
386 for (i
= 0; i
< core_num_syms
; ++i
)
388 class = core_sym_class (core_syms
[i
]);
392 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
393 core_syms
[i
]->value
, core_syms
[i
]->name
));
396 /* This should be replaced with a binary search or hashed
401 for (j
= 0; j
< symbol_map_count
; j
++)
402 if (!strcmp (core_syms
[i
]->name
, symbol_map
[j
].function_name
))
404 if (j
> 0 && ! strcmp (symbol_map
[j
].file_name
,
405 symbol_map
[j
- 1].file_name
))
415 sym_init (symtab
.limit
);
417 /* symbol offsets are always section-relative: */
419 symtab
.limit
->addr
= core_syms
[i
]->value
+ core_syms
[i
]->section
->vma
;
421 && !strcmp (core_syms
[i
]->name
, symbol_map
[found
].function_name
))
423 symtab
.limit
->name
= symbol_map
[found
].file_name
;
424 symtab
.limit
->mapped
= 1;
428 symtab
.limit
->name
= core_syms
[i
]->name
;
429 symtab
.limit
->mapped
= 0;
434 * Suppress symbols that are not function names. This is
435 * useful to suppress code-labels and aliases.
437 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
438 * labels do not appear in the symbol table info, so this isn't
442 const char *filename
, *func_name
;
444 if (get_src_info (symtab
.limit
->addr
, &filename
, &func_name
,
445 &symtab
.limit
->line_num
))
447 symtab
.limit
->file
= source_file_lookup_path (filename
);
449 if (strcmp (symtab
.limit
->name
, func_name
) != 0)
452 * The symbol's address maps to a different name, so
453 * it can't be a function-entry point. This happens
454 * for labels, for example.
457 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
458 symtab
.limit
->name
, func_name
));
465 symtab
.limit
->is_func
= TRUE
;
466 symtab
.limit
->is_bb_head
= TRUE
;
469 symtab
.limit
->is_static
= TRUE
;
472 min_vma
= MIN (symtab
.limit
->addr
, min_vma
);
473 max_vma
= MAX (symtab
.limit
->addr
, max_vma
);
476 * If we see "main" without an initial '_', we assume names
477 * are *not* prefixed by '_'.
479 if (symtab
.limit
->name
[0] == 'm' && discard_underscores
480 && strcmp (symtab
.limit
->name
, "main") == 0)
482 discard_underscores
= 0;
485 DBG (AOUTDEBUG
, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
486 (long) (symtab
.limit
- symtab
.base
),
487 symtab
.limit
->name
, symtab
.limit
->addr
));
491 /* create sentinels: */
493 sym_init (symtab
.limit
);
494 symtab
.limit
->name
= "<locore>";
495 symtab
.limit
->addr
= 0;
496 symtab
.limit
->end_addr
= min_vma
- 1;
499 sym_init (symtab
.limit
);
500 symtab
.limit
->name
= "<hicore>";
501 symtab
.limit
->addr
= max_vma
+ 1;
502 symtab
.limit
->end_addr
= ~0;
505 symtab
.len
= symtab
.limit
- symtab
.base
;
506 symtab_finalize (&symtab
);
511 * Read in symbol table from core. One symbol per line of source code
515 DEFUN (core_create_line_syms
, (core_bfd
), bfd
* core_bfd
)
517 char prev_name
[PATH_MAX
], prev_filename
[PATH_MAX
];
518 bfd_vma vma
, min_vma
= ~0, max_vma
= 0;
519 bfd_vma offset
, prev_offset
, min_dist
;
520 Sym
*prev
, dummy
, *sentinel
, *sym
;
521 const char *filename
;
522 int prev_line_num
, i
;
525 * Create symbols for functions as usual. This is necessary in
526 * cases where parts of a program were not compiled with -g. For
527 * those parts we still want to get info at the function level:
529 core_create_function_syms (core_bfd
);
531 /* pass 1 - counter number of symbols: */
534 * To find all line information, walk through all possible
535 * text-space addresses (one by one!) and get the debugging
536 * info for each address. When the debugging info changes,
537 * it is time to create a new symbol.
539 * Of course, this is rather slow and it would be better if
540 * bfd would provide an iterator for enumerating all line
541 * infos, but for now, we try to speed up the second pass
542 * by determining what the minimum code distance between two
547 min_dist
= core_text_sect
->_raw_size
;
548 prev_offset
= -min_dist
;
549 prev_filename
[0] = '\0';
551 for (offset
= 0; offset
< core_text_sect
->_raw_size
; offset
+= MIN_INSN_SIZE
)
553 vma
= core_text_sect
->vma
+ offset
;
554 if (!get_src_info (vma
, &filename
, &dummy
.name
, &dummy
.line_num
)
555 || (prev_line_num
== dummy
.line_num
&&
556 strcmp (prev_name
, dummy
.name
) == 0
557 && strcmp (prev_filename
, filename
) == 0))
563 prev_line_num
= dummy
.line_num
;
564 strcpy (prev_name
, dummy
.name
);
565 strcpy (prev_filename
, filename
);
567 if (offset
- prev_offset
< min_dist
)
569 min_dist
= offset
- prev_offset
;
571 prev_offset
= offset
;
573 min_vma
= MIN (vma
, min_vma
);
574 max_vma
= MAX (vma
, max_vma
);
577 DBG (AOUTDEBUG
, printf ("[core_create_line_syms] min_dist=%lx\n", min_dist
));
579 /* make room for function symbols, too: */
580 ltab
.len
+= symtab
.len
;
581 ltab
.base
= (Sym
*) xmalloc (ltab
.len
* sizeof (Sym
));
582 ltab
.limit
= ltab
.base
;
584 /* pass 2 - create symbols: */
587 for (offset
= 0; offset
< core_text_sect
->_raw_size
; offset
+= min_dist
)
589 sym_init (ltab
.limit
);
590 if (!get_src_info (core_text_sect
->vma
+ offset
, &filename
,
591 <ab
.limit
->name
, <ab
.limit
->line_num
)
592 || (prev
&& prev
->line_num
== ltab
.limit
->line_num
593 && strcmp (prev
->name
, ltab
.limit
->name
) == 0
594 && strcmp (prev
->file
->name
, filename
) == 0))
599 /* make name pointer a malloc'ed string: */
600 ltab
.limit
->name
= xstrdup (ltab
.limit
->name
);
601 ltab
.limit
->file
= source_file_lookup_path (filename
);
603 ltab
.limit
->addr
= core_text_sect
->vma
+ offset
;
607 * If we see "main" without an initial '_', we assume names
608 * are *not* prefixed by '_'.
610 if (ltab
.limit
->name
[0] == 'm' && discard_underscores
611 && strcmp (ltab
.limit
->name
, "main") == 0)
613 discard_underscores
= 0;
616 DBG (AOUTDEBUG
, printf ("[core_create_line_syms] %d %s 0x%lx\n",
617 ltab
.len
, ltab
.limit
->name
,
622 /* update sentinels: */
624 sentinel
= sym_lookup (&symtab
, 0);
625 if (strcmp (sentinel
->name
, "<locore>") == 0
626 && min_vma
<= sentinel
->end_addr
)
628 sentinel
->end_addr
= min_vma
- 1;
631 sentinel
= sym_lookup (&symtab
, ~0);
632 if (strcmp (sentinel
->name
, "<hicore>") == 0 && max_vma
>= sentinel
->addr
)
634 sentinel
->addr
= max_vma
+ 1;
637 /* copy in function symbols: */
638 memcpy (ltab
.limit
, symtab
.base
, symtab
.len
* sizeof (Sym
));
639 ltab
.limit
+= symtab
.len
;
641 if (ltab
.limit
- ltab
.base
!= ltab
.len
)
644 "%s: somebody miscounted: ltab.len=%ld instead of %d\n",
645 whoami
, (long) (ltab
.limit
- ltab
.base
), ltab
.len
);
649 /* finalize ltab and make it symbol table: */
651 symtab_finalize (<ab
);
655 /* now go through all core symbols and set is_static accordingly: */
657 for (i
= 0; i
< core_num_syms
; ++i
)
659 if (core_sym_class (core_syms
[i
]) == 't')
661 sym
= sym_lookup (&symtab
, core_syms
[i
]->value
662 + core_syms
[i
]->section
->vma
);
665 sym
++->is_static
= TRUE
;
667 while (sym
->file
== sym
[-1].file
&&
668 strcmp (sym
->name
, sym
[-1].name
) == 0);