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);