File: | src/gnu/usr.bin/binutils/bfd/syms.c |
Warning: | line 937, column 7 Value stored to 'stabsize' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | /* Generic symbol-table support for the BFD library. |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
3 | 2000, 2001, 2002, 2003 |
4 | Free Software Foundation, Inc. |
5 | Written by Cygnus Support. |
6 | |
7 | This file is part of BFD, the Binary File Descriptor library. |
8 | |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2 of the License, or |
12 | (at your option) any later version. |
13 | |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | GNU General Public License for more details. |
18 | |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
22 | |
23 | /* |
24 | SECTION |
25 | Symbols |
26 | |
27 | BFD tries to maintain as much symbol information as it can when |
28 | it moves information from file to file. BFD passes information |
29 | to applications though the <<asymbol>> structure. When the |
30 | application requests the symbol table, BFD reads the table in |
31 | the native form and translates parts of it into the internal |
32 | format. To maintain more than the information passed to |
33 | applications, some targets keep some information ``behind the |
34 | scenes'' in a structure only the particular back end knows |
35 | about. For example, the coff back end keeps the original |
36 | symbol table structure as well as the canonical structure when |
37 | a BFD is read in. On output, the coff back end can reconstruct |
38 | the output symbol table so that no information is lost, even |
39 | information unique to coff which BFD doesn't know or |
40 | understand. If a coff symbol table were read, but were written |
41 | through an a.out back end, all the coff specific information |
42 | would be lost. The symbol table of a BFD |
43 | is not necessarily read in until a canonicalize request is |
44 | made. Then the BFD back end fills in a table provided by the |
45 | application with pointers to the canonical information. To |
46 | output symbols, the application provides BFD with a table of |
47 | pointers to pointers to <<asymbol>>s. This allows applications |
48 | like the linker to output a symbol as it was read, since the ``behind |
49 | the scenes'' information will be still available. |
50 | @menu |
51 | @* Reading Symbols:: |
52 | @* Writing Symbols:: |
53 | @* Mini Symbols:: |
54 | @* typedef asymbol:: |
55 | @* symbol handling functions:: |
56 | @end menu |
57 | |
58 | INODE |
59 | Reading Symbols, Writing Symbols, Symbols, Symbols |
60 | SUBSECTION |
61 | Reading symbols |
62 | |
63 | There are two stages to reading a symbol table from a BFD: |
64 | allocating storage, and the actual reading process. This is an |
65 | excerpt from an application which reads the symbol table: |
66 | |
67 | | long storage_needed; |
68 | | asymbol **symbol_table; |
69 | | long number_of_symbols; |
70 | | long i; |
71 | | |
72 | | storage_needed = bfd_get_symtab_upper_bound (abfd); |
73 | | |
74 | | if (storage_needed < 0) |
75 | | FAIL |
76 | | |
77 | | if (storage_needed == 0) |
78 | | return; |
79 | | |
80 | | symbol_table = xmalloc (storage_needed); |
81 | | ... |
82 | | number_of_symbols = |
83 | | bfd_canonicalize_symtab (abfd, symbol_table); |
84 | | |
85 | | if (number_of_symbols < 0) |
86 | | FAIL |
87 | | |
88 | | for (i = 0; i < number_of_symbols; i++) |
89 | | process_symbol (symbol_table[i]); |
90 | |
91 | All storage for the symbols themselves is in an objalloc |
92 | connected to the BFD; it is freed when the BFD is closed. |
93 | |
94 | INODE |
95 | Writing Symbols, Mini Symbols, Reading Symbols, Symbols |
96 | SUBSECTION |
97 | Writing symbols |
98 | |
99 | Writing of a symbol table is automatic when a BFD open for |
100 | writing is closed. The application attaches a vector of |
101 | pointers to pointers to symbols to the BFD being written, and |
102 | fills in the symbol count. The close and cleanup code reads |
103 | through the table provided and performs all the necessary |
104 | operations. The BFD output code must always be provided with an |
105 | ``owned'' symbol: one which has come from another BFD, or one |
106 | which has been created using <<bfd_make_empty_symbol>>. Here is an |
107 | example showing the creation of a symbol table with only one element: |
108 | |
109 | | #include "bfd.h" |
110 | | int main (void) |
111 | | { |
112 | | bfd *abfd; |
113 | | asymbol *ptrs[2]; |
114 | | asymbol *new; |
115 | | |
116 | | abfd = bfd_openw ("foo","a.out-sunos-big"); |
117 | | bfd_set_format (abfd, bfd_object); |
118 | | new = bfd_make_empty_symbol (abfd); |
119 | | new->name = "dummy_symbol"; |
120 | | new->section = bfd_make_section_old_way (abfd, ".text"); |
121 | | new->flags = BSF_GLOBAL; |
122 | | new->value = 0x12345; |
123 | | |
124 | | ptrs[0] = new; |
125 | | ptrs[1] = 0; |
126 | | |
127 | | bfd_set_symtab (abfd, ptrs, 1); |
128 | | bfd_close (abfd); |
129 | | return 0; |
130 | | } |
131 | | |
132 | | ./makesym |
133 | | nm foo |
134 | | 00012345 A dummy_symbol |
135 | |
136 | Many formats cannot represent arbitrary symbol information; for |
137 | instance, the <<a.out>> object format does not allow an |
138 | arbitrary number of sections. A symbol pointing to a section |
139 | which is not one of <<.text>>, <<.data>> or <<.bss>> cannot |
140 | be described. |
141 | |
142 | INODE |
143 | Mini Symbols, typedef asymbol, Writing Symbols, Symbols |
144 | SUBSECTION |
145 | Mini Symbols |
146 | |
147 | Mini symbols provide read-only access to the symbol table. |
148 | They use less memory space, but require more time to access. |
149 | They can be useful for tools like nm or objdump, which may |
150 | have to handle symbol tables of extremely large executables. |
151 | |
152 | The <<bfd_read_minisymbols>> function will read the symbols |
153 | into memory in an internal form. It will return a <<void *>> |
154 | pointer to a block of memory, a symbol count, and the size of |
155 | each symbol. The pointer is allocated using <<malloc>>, and |
156 | should be freed by the caller when it is no longer needed. |
157 | |
158 | The function <<bfd_minisymbol_to_symbol>> will take a pointer |
159 | to a minisymbol, and a pointer to a structure returned by |
160 | <<bfd_make_empty_symbol>>, and return a <<asymbol>> structure. |
161 | The return value may or may not be the same as the value from |
162 | <<bfd_make_empty_symbol>> which was passed in. |
163 | |
164 | */ |
165 | |
166 | /* |
167 | DOCDD |
168 | INODE |
169 | typedef asymbol, symbol handling functions, Mini Symbols, Symbols |
170 | |
171 | */ |
172 | /* |
173 | SUBSECTION |
174 | typedef asymbol |
175 | |
176 | An <<asymbol>> has the form: |
177 | |
178 | */ |
179 | |
180 | /* |
181 | CODE_FRAGMENT |
182 | |
183 | . |
184 | .typedef struct bfd_symbol |
185 | .{ |
186 | . {* A pointer to the BFD which owns the symbol. This information |
187 | . is necessary so that a back end can work out what additional |
188 | . information (invisible to the application writer) is carried |
189 | . with the symbol. |
190 | . |
191 | . This field is *almost* redundant, since you can use section->owner |
192 | . instead, except that some symbols point to the global sections |
193 | . bfd_{abs,com,und}_section. This could be fixed by making |
194 | . these globals be per-bfd (or per-target-flavor). FIXME. *} |
195 | . struct bfd *the_bfd; {* Use bfd_asymbol_bfd(sym) to access this field. *} |
196 | . |
197 | . {* The text of the symbol. The name is left alone, and not copied; the |
198 | . application may not alter it. *} |
199 | . const char *name; |
200 | . |
201 | . {* The value of the symbol. This really should be a union of a |
202 | . numeric value with a pointer, since some flags indicate that |
203 | . a pointer to another symbol is stored here. *} |
204 | . symvalue value; |
205 | . |
206 | . {* Attributes of a symbol. *} |
207 | .#define BSF_NO_FLAGS 0x00 |
208 | . |
209 | . {* The symbol has local scope; <<static>> in <<C>>. The value |
210 | . is the offset into the section of the data. *} |
211 | .#define BSF_LOCAL 0x01 |
212 | . |
213 | . {* The symbol has global scope; initialized data in <<C>>. The |
214 | . value is the offset into the section of the data. *} |
215 | .#define BSF_GLOBAL 0x02 |
216 | . |
217 | . {* The symbol has global scope and is exported. The value is |
218 | . the offset into the section of the data. *} |
219 | .#define BSF_EXPORT BSF_GLOBAL {* No real difference. *} |
220 | . |
221 | . {* A normal C symbol would be one of: |
222 | . <<BSF_LOCAL>>, <<BSF_FORT_COMM>>, <<BSF_UNDEFINED>> or |
223 | . <<BSF_GLOBAL>>. *} |
224 | . |
225 | . {* The symbol is a debugging record. The value has an arbitrary |
226 | . meaning, unless BSF_DEBUGGING_RELOC is also set. *} |
227 | .#define BSF_DEBUGGING 0x08 |
228 | . |
229 | . {* The symbol denotes a function entry point. Used in ELF, |
230 | . perhaps others someday. *} |
231 | .#define BSF_FUNCTION 0x10 |
232 | . |
233 | . {* Used by the linker. *} |
234 | .#define BSF_KEEP 0x20 |
235 | .#define BSF_KEEP_G 0x40 |
236 | . |
237 | . {* A weak global symbol, overridable without warnings by |
238 | . a regular global symbol of the same name. *} |
239 | .#define BSF_WEAK 0x80 |
240 | . |
241 | . {* This symbol was created to point to a section, e.g. ELF's |
242 | . STT_SECTION symbols. *} |
243 | .#define BSF_SECTION_SYM 0x100 |
244 | . |
245 | . {* The symbol used to be a common symbol, but now it is |
246 | . allocated. *} |
247 | .#define BSF_OLD_COMMON 0x200 |
248 | . |
249 | . {* The default value for common data. *} |
250 | .#define BFD_FORT_COMM_DEFAULT_VALUE 0 |
251 | . |
252 | . {* In some files the type of a symbol sometimes alters its |
253 | . location in an output file - ie in coff a <<ISFCN>> symbol |
254 | . which is also <<C_EXT>> symbol appears where it was |
255 | . declared and not at the end of a section. This bit is set |
256 | . by the target BFD part to convey this information. *} |
257 | .#define BSF_NOT_AT_END 0x400 |
258 | . |
259 | . {* Signal that the symbol is the label of constructor section. *} |
260 | .#define BSF_CONSTRUCTOR 0x800 |
261 | . |
262 | . {* Signal that the symbol is a warning symbol. The name is a |
263 | . warning. The name of the next symbol is the one to warn about; |
264 | . if a reference is made to a symbol with the same name as the next |
265 | . symbol, a warning is issued by the linker. *} |
266 | .#define BSF_WARNING 0x1000 |
267 | . |
268 | . {* Signal that the symbol is indirect. This symbol is an indirect |
269 | . pointer to the symbol with the same name as the next symbol. *} |
270 | .#define BSF_INDIRECT 0x2000 |
271 | . |
272 | . {* BSF_FILE marks symbols that contain a file name. This is used |
273 | . for ELF STT_FILE symbols. *} |
274 | .#define BSF_FILE 0x4000 |
275 | . |
276 | . {* Symbol is from dynamic linking information. *} |
277 | .#define BSF_DYNAMIC 0x8000 |
278 | . |
279 | . {* The symbol denotes a data object. Used in ELF, and perhaps |
280 | . others someday. *} |
281 | .#define BSF_OBJECT 0x10000 |
282 | . |
283 | . {* This symbol is a debugging symbol. The value is the offset |
284 | . into the section of the data. BSF_DEBUGGING should be set |
285 | . as well. *} |
286 | .#define BSF_DEBUGGING_RELOC 0x20000 |
287 | . |
288 | . {* This symbol is thread local. Used in ELF. *} |
289 | .#define BSF_THREAD_LOCAL 0x40000 |
290 | . |
291 | . flagword flags; |
292 | . |
293 | . {* A pointer to the section to which this symbol is |
294 | . relative. This will always be non NULL, there are special |
295 | . sections for undefined and absolute symbols. *} |
296 | . struct bfd_section *section; |
297 | . |
298 | . {* Back end special data. *} |
299 | . union |
300 | . { |
301 | . void *p; |
302 | . bfd_vma i; |
303 | . } |
304 | . udata; |
305 | .} |
306 | .asymbol; |
307 | . |
308 | */ |
309 | |
310 | #include "bfd.h" |
311 | #include "sysdep.h" |
312 | #include "libbfd.h" |
313 | #include "safe-ctype.h" |
314 | #include "bfdlink.h" |
315 | #include "aout/stab_gnu.h" |
316 | |
317 | /* |
318 | DOCDD |
319 | INODE |
320 | symbol handling functions, , typedef asymbol, Symbols |
321 | SUBSECTION |
322 | Symbol handling functions |
323 | */ |
324 | |
325 | /* |
326 | FUNCTION |
327 | bfd_get_symtab_upper_bound |
328 | |
329 | DESCRIPTION |
330 | Return the number of bytes required to store a vector of pointers |
331 | to <<asymbols>> for all the symbols in the BFD @var{abfd}, |
332 | including a terminal NULL pointer. If there are no symbols in |
333 | the BFD, then return 0. If an error occurs, return -1. |
334 | |
335 | .#define bfd_get_symtab_upper_bound(abfd) \ |
336 | . BFD_SEND (abfd, _bfd_get_symtab_upper_bound, (abfd)) |
337 | . |
338 | */ |
339 | |
340 | /* |
341 | FUNCTION |
342 | bfd_is_local_label |
343 | |
344 | SYNOPSIS |
345 | bfd_boolean bfd_is_local_label (bfd *abfd, asymbol *sym); |
346 | |
347 | DESCRIPTION |
348 | Return TRUE if the given symbol @var{sym} in the BFD @var{abfd} is |
349 | a compiler generated local label, else return FALSE. |
350 | */ |
351 | |
352 | bfd_boolean |
353 | bfd_is_local_label (bfd *abfd, asymbol *sym) |
354 | { |
355 | /* The BSF_SECTION_SYM check is needed for IA-64, where every label that |
356 | starts with '.' is local. This would accidentally catch section names |
357 | if we didn't reject them here. */ |
358 | if ((sym->flags & (BSF_GLOBAL0x02 | BSF_WEAK0x80 | BSF_SECTION_SYM0x100)) != 0) |
359 | return FALSE0; |
360 | if (sym->name == NULL((void*)0)) |
361 | return FALSE0; |
362 | return bfd_is_local_label_name (abfd, sym->name)((*((abfd)->xvec->_bfd_is_local_label_name)) (abfd, sym ->name)); |
363 | } |
364 | |
365 | /* |
366 | FUNCTION |
367 | bfd_is_local_label_name |
368 | |
369 | SYNOPSIS |
370 | bfd_boolean bfd_is_local_label_name (bfd *abfd, const char *name); |
371 | |
372 | DESCRIPTION |
373 | Return TRUE if a symbol with the name @var{name} in the BFD |
374 | @var{abfd} is a compiler generated local label, else return |
375 | FALSE. This just checks whether the name has the form of a |
376 | local label. |
377 | |
378 | .#define bfd_is_local_label_name(abfd, name) \ |
379 | . BFD_SEND (abfd, _bfd_is_local_label_name, (abfd, name)) |
380 | . |
381 | */ |
382 | |
383 | /* |
384 | FUNCTION |
385 | bfd_canonicalize_symtab |
386 | |
387 | DESCRIPTION |
388 | Read the symbols from the BFD @var{abfd}, and fills in |
389 | the vector @var{location} with pointers to the symbols and |
390 | a trailing NULL. |
391 | Return the actual number of symbol pointers, not |
392 | including the NULL. |
393 | |
394 | .#define bfd_canonicalize_symtab(abfd, location) \ |
395 | . BFD_SEND (abfd, _bfd_canonicalize_symtab, (abfd, location)) |
396 | . |
397 | */ |
398 | |
399 | /* |
400 | FUNCTION |
401 | bfd_set_symtab |
402 | |
403 | SYNOPSIS |
404 | bfd_boolean bfd_set_symtab |
405 | (bfd *abfd, asymbol **location, unsigned int count); |
406 | |
407 | DESCRIPTION |
408 | Arrange that when the output BFD @var{abfd} is closed, |
409 | the table @var{location} of @var{count} pointers to symbols |
410 | will be written. |
411 | */ |
412 | |
413 | bfd_boolean |
414 | bfd_set_symtab (bfd *abfd, asymbol **location, unsigned int symcount) |
415 | { |
416 | if (abfd->format != bfd_object || bfd_read_p (abfd)((abfd)->direction == read_direction || (abfd)->direction == both_direction)) |
417 | { |
418 | bfd_set_error (bfd_error_invalid_operation); |
419 | return FALSE0; |
420 | } |
421 | |
422 | bfd_get_outsymbols (abfd)((abfd)->outsymbols) = location; |
423 | bfd_get_symcount (abfd)((abfd)->symcount) = symcount; |
424 | return TRUE1; |
425 | } |
426 | |
427 | /* |
428 | FUNCTION |
429 | bfd_print_symbol_vandf |
430 | |
431 | SYNOPSIS |
432 | void bfd_print_symbol_vandf (bfd *abfd, void *file, asymbol *symbol); |
433 | |
434 | DESCRIPTION |
435 | Print the value and flags of the @var{symbol} supplied to the |
436 | stream @var{file}. |
437 | */ |
438 | void |
439 | bfd_print_symbol_vandf (bfd *abfd, void *arg, asymbol *symbol) |
440 | { |
441 | FILE *file = arg; |
442 | |
443 | flagword type = symbol->flags; |
444 | |
445 | if (symbol->section != NULL((void*)0)) |
446 | bfd_fprintf_vma (abfd, file, symbol->value + symbol->section->vma); |
447 | else |
448 | bfd_fprintf_vma (abfd, file, symbol->value); |
449 | |
450 | /* This presumes that a symbol can not be both BSF_DEBUGGING and |
451 | BSF_DYNAMIC, nor more than one of BSF_FUNCTION, BSF_FILE, and |
452 | BSF_OBJECT. */ |
453 | fprintf (file, " %c%c%c%c%c%c%c", |
454 | ((type & BSF_LOCAL0x01) |
455 | ? (type & BSF_GLOBAL0x02) ? '!' : 'l' |
456 | : (type & BSF_GLOBAL0x02) ? 'g' : ' '), |
457 | (type & BSF_WEAK0x80) ? 'w' : ' ', |
458 | (type & BSF_CONSTRUCTOR0x800) ? 'C' : ' ', |
459 | (type & BSF_WARNING0x1000) ? 'W' : ' ', |
460 | (type & BSF_INDIRECT0x2000) ? 'I' : ' ', |
461 | (type & BSF_DEBUGGING0x08) ? 'd' : (type & BSF_DYNAMIC0x8000) ? 'D' : ' ', |
462 | ((type & BSF_FUNCTION0x10) |
463 | ? 'F' |
464 | : ((type & BSF_FILE0x4000) |
465 | ? 'f' |
466 | : ((type & BSF_OBJECT0x10000) ? 'O' : ' ')))); |
467 | } |
468 | |
469 | /* |
470 | FUNCTION |
471 | bfd_make_empty_symbol |
472 | |
473 | DESCRIPTION |
474 | Create a new <<asymbol>> structure for the BFD @var{abfd} |
475 | and return a pointer to it. |
476 | |
477 | This routine is necessary because each back end has private |
478 | information surrounding the <<asymbol>>. Building your own |
479 | <<asymbol>> and pointing to it will not create the private |
480 | information, and will cause problems later on. |
481 | |
482 | .#define bfd_make_empty_symbol(abfd) \ |
483 | . BFD_SEND (abfd, _bfd_make_empty_symbol, (abfd)) |
484 | . |
485 | */ |
486 | |
487 | /* |
488 | FUNCTION |
489 | _bfd_generic_make_empty_symbol |
490 | |
491 | SYNOPSIS |
492 | asymbol *_bfd_generic_make_empty_symbol (bfd *); |
493 | |
494 | DESCRIPTION |
495 | Create a new <<asymbol>> structure for the BFD @var{abfd} |
496 | and return a pointer to it. Used by core file routines, |
497 | binary back-end and anywhere else where no private info |
498 | is needed. |
499 | */ |
500 | |
501 | asymbol * |
502 | _bfd_generic_make_empty_symbol (bfd *abfd) |
503 | { |
504 | bfd_size_type amt = sizeof (asymbol); |
505 | asymbol *new = bfd_zalloc (abfd, amt); |
506 | if (new) |
507 | new->the_bfd = abfd; |
508 | return new; |
509 | } |
510 | |
511 | /* |
512 | FUNCTION |
513 | bfd_make_debug_symbol |
514 | |
515 | DESCRIPTION |
516 | Create a new <<asymbol>> structure for the BFD @var{abfd}, |
517 | to be used as a debugging symbol. Further details of its use have |
518 | yet to be worked out. |
519 | |
520 | .#define bfd_make_debug_symbol(abfd,ptr,size) \ |
521 | . BFD_SEND (abfd, _bfd_make_debug_symbol, (abfd, ptr, size)) |
522 | . |
523 | */ |
524 | |
525 | struct section_to_type |
526 | { |
527 | const char *section; |
528 | char type; |
529 | }; |
530 | |
531 | /* Map section names to POSIX/BSD single-character symbol types. |
532 | This table is probably incomplete. It is sorted for convenience of |
533 | adding entries. Since it is so short, a linear search is used. */ |
534 | static const struct section_to_type stt[] = |
535 | { |
536 | {".bss", 'b'}, |
537 | {"code", 't'}, /* MRI .text */ |
538 | {".data", 'd'}, |
539 | {"*DEBUG*", 'N'}, |
540 | {".debug", 'N'}, /* MSVC's .debug (non-standard debug syms) */ |
541 | {".drectve", 'i'}, /* MSVC's .drective section */ |
542 | {".edata", 'e'}, /* MSVC's .edata (export) section */ |
543 | {".fini", 't'}, /* ELF fini section */ |
544 | {".idata", 'i'}, /* MSVC's .idata (import) section */ |
545 | {".init", 't'}, /* ELF init section */ |
546 | {".pdata", 'p'}, /* MSVC's .pdata (stack unwind) section */ |
547 | {".rdata", 'r'}, /* Read only data. */ |
548 | {".rodata", 'r'}, /* Read only data. */ |
549 | {".sbss", 's'}, /* Small BSS (uninitialized data). */ |
550 | {".scommon", 'c'}, /* Small common. */ |
551 | {".sdata", 'g'}, /* Small initialized data. */ |
552 | {".text", 't'}, |
553 | {"vars", 'd'}, /* MRI .data */ |
554 | {"zerovars", 'b'}, /* MRI .bss */ |
555 | {0, 0} |
556 | }; |
557 | |
558 | /* Return the single-character symbol type corresponding to |
559 | section S, or '?' for an unknown COFF section. |
560 | |
561 | Check for any leading string which matches, so .text5 returns |
562 | 't' as well as .text */ |
563 | |
564 | static char |
565 | coff_section_type (const char *s) |
566 | { |
567 | const struct section_to_type *t; |
568 | |
569 | for (t = &stt[0]; t->section; t++) |
570 | if (!strncmp (s, t->section, strlen (t->section))) |
571 | return t->type; |
572 | |
573 | return '?'; |
574 | } |
575 | |
576 | /* Return the single-character symbol type corresponding to section |
577 | SECTION, or '?' for an unknown section. This uses section flags to |
578 | identify sections. |
579 | |
580 | FIXME These types are unhandled: c, i, e, p. If we handled these also, |
581 | we could perhaps obsolete coff_section_type. */ |
582 | |
583 | static char |
584 | decode_section_type (const struct bfd_section *section) |
585 | { |
586 | if (section->flags & SEC_CODE0x020) |
587 | return 't'; |
588 | if (section->flags & SEC_DATA0x040) |
589 | { |
590 | if (section->flags & SEC_READONLY0x010) |
591 | return 'r'; |
592 | else if (section->flags & SEC_SMALL_DATA0x2000000) |
593 | return 'g'; |
594 | else |
595 | return 'd'; |
596 | } |
597 | if ((section->flags & SEC_HAS_CONTENTS0x200) == 0) |
598 | { |
599 | if (section->flags & SEC_SMALL_DATA0x2000000) |
600 | return 's'; |
601 | else |
602 | return 'b'; |
603 | } |
604 | if (section->flags & SEC_DEBUGGING0x10000) |
605 | return 'N'; |
606 | if ((section->flags & SEC_HAS_CONTENTS0x200) && (section->flags & SEC_READONLY0x010)) |
607 | return 'n'; |
608 | |
609 | return '?'; |
610 | } |
611 | |
612 | /* |
613 | FUNCTION |
614 | bfd_decode_symclass |
615 | |
616 | DESCRIPTION |
617 | Return a character corresponding to the symbol |
618 | class of @var{symbol}, or '?' for an unknown class. |
619 | |
620 | SYNOPSIS |
621 | int bfd_decode_symclass (asymbol *symbol); |
622 | */ |
623 | int |
624 | bfd_decode_symclass (asymbol *symbol) |
625 | { |
626 | char c; |
627 | |
628 | if (bfd_is_com_section (symbol->section)(((symbol->section)->flags & 0x8000) != 0)) |
629 | return 'C'; |
630 | if (bfd_is_und_section (symbol->section)((symbol->section) == ((asection *) &bfd_und_section))) |
631 | { |
632 | if (symbol->flags & BSF_WEAK0x80) |
633 | { |
634 | /* If weak, determine if it's specifically an object |
635 | or non-object weak. */ |
636 | if (symbol->flags & BSF_OBJECT0x10000) |
637 | return 'v'; |
638 | else |
639 | return 'w'; |
640 | } |
641 | else |
642 | return 'U'; |
643 | } |
644 | if (bfd_is_ind_section (symbol->section)((symbol->section) == ((asection *) &bfd_ind_section))) |
645 | return 'I'; |
646 | if (symbol->flags & BSF_WEAK0x80) |
647 | { |
648 | /* If weak, determine if it's specifically an object |
649 | or non-object weak. */ |
650 | if (symbol->flags & BSF_OBJECT0x10000) |
651 | return 'V'; |
652 | else |
653 | return 'W'; |
654 | } |
655 | if (!(symbol->flags & (BSF_GLOBAL0x02 | BSF_LOCAL0x01))) |
656 | return '?'; |
657 | |
658 | if (bfd_is_abs_section (symbol->section)((symbol->section) == ((asection *) &bfd_abs_section))) |
659 | c = 'a'; |
660 | else if (symbol->section) |
661 | { |
662 | c = coff_section_type (symbol->section->name); |
663 | if (c == '?') |
664 | c = decode_section_type (symbol->section); |
665 | } |
666 | else |
667 | return '?'; |
668 | if (symbol->flags & BSF_GLOBAL0x02) |
669 | c = TOUPPER (c)_sch_toupper[(c) & 0xff]; |
670 | return c; |
671 | |
672 | /* We don't have to handle these cases just yet, but we will soon: |
673 | N_SETV: 'v'; |
674 | N_SETA: 'l'; |
675 | N_SETT: 'x'; |
676 | N_SETD: 'z'; |
677 | N_SETB: 's'; |
678 | N_INDR: 'i'; |
679 | */ |
680 | } |
681 | |
682 | /* |
683 | FUNCTION |
684 | bfd_is_undefined_symclass |
685 | |
686 | DESCRIPTION |
687 | Returns non-zero if the class symbol returned by |
688 | bfd_decode_symclass represents an undefined symbol. |
689 | Returns zero otherwise. |
690 | |
691 | SYNOPSIS |
692 | bfd_boolean bfd_is_undefined_symclass (int symclass); |
693 | */ |
694 | |
695 | bfd_boolean |
696 | bfd_is_undefined_symclass (int symclass) |
697 | { |
698 | return symclass == 'U' || symclass == 'w' || symclass == 'v'; |
699 | } |
700 | |
701 | /* |
702 | FUNCTION |
703 | bfd_symbol_info |
704 | |
705 | DESCRIPTION |
706 | Fill in the basic info about symbol that nm needs. |
707 | Additional info may be added by the back-ends after |
708 | calling this function. |
709 | |
710 | SYNOPSIS |
711 | void bfd_symbol_info (asymbol *symbol, symbol_info *ret); |
712 | */ |
713 | |
714 | void |
715 | bfd_symbol_info (asymbol *symbol, symbol_info *ret) |
716 | { |
717 | ret->type = bfd_decode_symclass (symbol); |
718 | |
719 | if (bfd_is_undefined_symclass (ret->type)) |
720 | ret->value = 0; |
721 | else |
722 | ret->value = symbol->value + symbol->section->vma; |
723 | |
724 | ret->name = symbol->name; |
725 | } |
726 | |
727 | /* |
728 | FUNCTION |
729 | bfd_copy_private_symbol_data |
730 | |
731 | SYNOPSIS |
732 | bfd_boolean bfd_copy_private_symbol_data |
733 | (bfd *ibfd, asymbol *isym, bfd *obfd, asymbol *osym); |
734 | |
735 | DESCRIPTION |
736 | Copy private symbol information from @var{isym} in the BFD |
737 | @var{ibfd} to the symbol @var{osym} in the BFD @var{obfd}. |
738 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error |
739 | returns are: |
740 | |
741 | o <<bfd_error_no_memory>> - |
742 | Not enough memory exists to create private data for @var{osec}. |
743 | |
744 | .#define bfd_copy_private_symbol_data(ibfd, isymbol, obfd, osymbol) \ |
745 | . BFD_SEND (obfd, _bfd_copy_private_symbol_data, \ |
746 | . (ibfd, isymbol, obfd, osymbol)) |
747 | . |
748 | */ |
749 | |
750 | /* The generic version of the function which returns mini symbols. |
751 | This is used when the backend does not provide a more efficient |
752 | version. It just uses BFD asymbol structures as mini symbols. */ |
753 | |
754 | long |
755 | _bfd_generic_read_minisymbols (bfd *abfd, |
756 | bfd_boolean dynamic, |
757 | void **minisymsp, |
758 | unsigned int *sizep) |
759 | { |
760 | long storage; |
761 | asymbol **syms = NULL((void*)0); |
762 | long symcount; |
763 | |
764 | if (dynamic) |
765 | storage = bfd_get_dynamic_symtab_upper_bound (abfd)((*((abfd)->xvec->_bfd_get_dynamic_symtab_upper_bound)) (abfd)); |
766 | else |
767 | storage = bfd_get_symtab_upper_bound (abfd)((*((abfd)->xvec->_bfd_get_symtab_upper_bound)) (abfd)); |
768 | if (storage < 0) |
769 | goto error_return; |
770 | if (storage == 0) |
771 | return 0; |
772 | |
773 | syms = bfd_malloc (storage); |
774 | if (syms == NULL((void*)0)) |
775 | goto error_return; |
776 | |
777 | if (dynamic) |
778 | symcount = bfd_canonicalize_dynamic_symtab (abfd, syms)((*((abfd)->xvec->_bfd_canonicalize_dynamic_symtab)) (abfd , syms)); |
779 | else |
780 | symcount = bfd_canonicalize_symtab (abfd, syms)((*((abfd)->xvec->_bfd_canonicalize_symtab)) (abfd, syms )); |
781 | if (symcount < 0) |
782 | goto error_return; |
783 | |
784 | *minisymsp = syms; |
785 | *sizep = sizeof (asymbol *); |
786 | return symcount; |
787 | |
788 | error_return: |
789 | bfd_set_error (bfd_error_no_symbols); |
790 | if (syms != NULL((void*)0)) |
791 | free (syms); |
792 | return -1; |
793 | } |
794 | |
795 | /* The generic version of the function which converts a minisymbol to |
796 | an asymbol. We don't worry about the sym argument we are passed; |
797 | we just return the asymbol the minisymbol points to. */ |
798 | |
799 | asymbol * |
800 | _bfd_generic_minisymbol_to_symbol (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
801 | bfd_boolean dynamic ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
802 | const void *minisym, |
803 | asymbol *sym ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
804 | { |
805 | return *(asymbol **) minisym; |
806 | } |
807 | |
808 | /* Look through stabs debugging information in .stab and .stabstr |
809 | sections to find the source file and line closest to a desired |
810 | location. This is used by COFF and ELF targets. It sets *pfound |
811 | to TRUE if it finds some information. The *pinfo field is used to |
812 | pass cached information in and out of this routine; this first time |
813 | the routine is called for a BFD, *pinfo should be NULL. The value |
814 | placed in *pinfo should be saved with the BFD, and passed back each |
815 | time this function is called. */ |
816 | |
817 | /* We use a cache by default. */ |
818 | |
819 | #define ENABLE_CACHING |
820 | |
821 | /* We keep an array of indexentry structures to record where in the |
822 | stabs section we should look to find line number information for a |
823 | particular address. */ |
824 | |
825 | struct indexentry |
826 | { |
827 | bfd_vma val; |
828 | bfd_byte *stab; |
829 | bfd_byte *str; |
830 | char *directory_name; |
831 | char *file_name; |
832 | char *function_name; |
833 | }; |
834 | |
835 | /* Compare two indexentry structures. This is called via qsort. */ |
836 | |
837 | static int |
838 | cmpindexentry (const void *a, const void *b) |
839 | { |
840 | const struct indexentry *contestantA = a; |
841 | const struct indexentry *contestantB = b; |
842 | |
843 | if (contestantA->val < contestantB->val) |
844 | return -1; |
845 | else if (contestantA->val > contestantB->val) |
846 | return 1; |
847 | else |
848 | return 0; |
849 | } |
850 | |
851 | /* A pointer to this structure is stored in *pinfo. */ |
852 | |
853 | struct stab_find_info |
854 | { |
855 | /* The .stab section. */ |
856 | asection *stabsec; |
857 | /* The .stabstr section. */ |
858 | asection *strsec; |
859 | /* The contents of the .stab section. */ |
860 | bfd_byte *stabs; |
861 | /* The contents of the .stabstr section. */ |
862 | bfd_byte *strs; |
863 | |
864 | /* A table that indexes stabs by memory address. */ |
865 | struct indexentry *indextable; |
866 | /* The number of entries in indextable. */ |
867 | int indextablesize; |
868 | |
869 | #ifdef ENABLE_CACHING |
870 | /* Cached values to restart quickly. */ |
871 | struct indexentry *cached_indexentry; |
872 | bfd_vma cached_offset; |
873 | bfd_byte *cached_stab; |
874 | char *cached_file_name; |
875 | #endif |
876 | |
877 | /* Saved ptr to malloc'ed filename. */ |
878 | char *filename; |
879 | }; |
880 | |
881 | bfd_boolean |
882 | _bfd_stab_section_find_nearest_line (bfd *abfd, |
883 | asymbol **symbols, |
884 | asection *section, |
885 | bfd_vma offset, |
886 | bfd_boolean *pfound, |
887 | const char **pfilename, |
888 | const char **pfnname, |
889 | unsigned int *pline, |
890 | void **pinfo) |
891 | { |
892 | struct stab_find_info *info; |
893 | bfd_size_type stabsize, strsize; |
894 | bfd_byte *stab, *str; |
895 | bfd_byte *last_stab = NULL((void*)0); |
896 | bfd_size_type stroff; |
897 | struct indexentry *indexentry; |
898 | char *file_name; |
899 | char *directory_name; |
900 | int saw_fun; |
901 | bfd_boolean saw_line, saw_func; |
902 | |
903 | *pfound = FALSE0; |
904 | *pfilename = bfd_get_filename (abfd)((char *) (abfd)->filename); |
905 | *pfnname = NULL((void*)0); |
906 | *pline = 0; |
907 | |
908 | /* Stabs entries use a 12 byte format: |
909 | 4 byte string table index |
910 | 1 byte stab type |
911 | 1 byte stab other field |
912 | 2 byte stab desc field |
913 | 4 byte stab value |
914 | FIXME: This will have to change for a 64 bit object format. |
915 | |
916 | The stabs symbols are divided into compilation units. For the |
917 | first entry in each unit, the type of 0, the value is the length |
918 | of the string table for this unit, and the desc field is the |
919 | number of stabs symbols for this unit. */ |
920 | |
921 | #define STRDXOFF(0) (0) |
922 | #define TYPEOFF(4) (4) |
923 | #define OTHEROFF(5) (5) |
924 | #define DESCOFF(6) (6) |
925 | #define VALOFF(8) (8) |
926 | #define STABSIZE(12) (12) |
927 | |
928 | info = *pinfo; |
929 | if (info != NULL((void*)0)) |
930 | { |
931 | if (info->stabsec == NULL((void*)0) || info->strsec == NULL((void*)0)) |
932 | { |
933 | /* No stabs debugging information. */ |
934 | return TRUE1; |
935 | } |
936 | |
937 | stabsize = info->stabsec->_raw_size; |
Value stored to 'stabsize' is never read | |
938 | strsize = info->strsec->_raw_size; |
939 | } |
940 | else |
941 | { |
942 | long reloc_size, reloc_count; |
943 | arelent **reloc_vector; |
944 | int i; |
945 | char *name; |
946 | char *function_name; |
947 | bfd_size_type amt = sizeof *info; |
948 | |
949 | info = bfd_zalloc (abfd, amt); |
950 | if (info == NULL((void*)0)) |
951 | return FALSE0; |
952 | |
953 | /* FIXME: When using the linker --split-by-file or |
954 | --split-by-reloc options, it is possible for the .stab and |
955 | .stabstr sections to be split. We should handle that. */ |
956 | |
957 | info->stabsec = bfd_get_section_by_name (abfd, ".stab"); |
958 | info->strsec = bfd_get_section_by_name (abfd, ".stabstr"); |
959 | |
960 | if (info->stabsec == NULL((void*)0) || info->strsec == NULL((void*)0)) |
961 | { |
962 | /* No stabs debugging information. Set *pinfo so that we |
963 | can return quickly in the info != NULL case above. */ |
964 | *pinfo = info; |
965 | return TRUE1; |
966 | } |
967 | |
968 | stabsize = info->stabsec->_raw_size; |
969 | strsize = info->strsec->_raw_size; |
970 | |
971 | info->stabs = bfd_alloc (abfd, stabsize); |
972 | info->strs = bfd_alloc (abfd, strsize); |
973 | if (info->stabs == NULL((void*)0) || info->strs == NULL((void*)0)) |
974 | return FALSE0; |
975 | |
976 | if (! bfd_get_section_contents (abfd, info->stabsec, info->stabs, |
977 | (bfd_vma) 0, stabsize) |
978 | || ! bfd_get_section_contents (abfd, info->strsec, info->strs, |
979 | (bfd_vma) 0, strsize)) |
980 | return FALSE0; |
981 | |
982 | /* If this is a relocatable object file, we have to relocate |
983 | the entries in .stab. This should always be simple 32 bit |
984 | relocations against symbols defined in this object file, so |
985 | this should be no big deal. */ |
986 | reloc_size = bfd_get_reloc_upper_bound (abfd, info->stabsec); |
987 | if (reloc_size < 0) |
988 | return FALSE0; |
989 | reloc_vector = bfd_malloc (reloc_size); |
990 | if (reloc_vector == NULL((void*)0) && reloc_size != 0) |
991 | return FALSE0; |
992 | reloc_count = bfd_canonicalize_reloc (abfd, info->stabsec, reloc_vector, |
993 | symbols); |
994 | if (reloc_count < 0) |
995 | { |
996 | if (reloc_vector != NULL((void*)0)) |
997 | free (reloc_vector); |
998 | return FALSE0; |
999 | } |
1000 | if (reloc_count > 0) |
1001 | { |
1002 | arelent **pr; |
1003 | |
1004 | for (pr = reloc_vector; *pr != NULL((void*)0); pr++) |
1005 | { |
1006 | arelent *r; |
1007 | unsigned long val; |
1008 | asymbol *sym; |
1009 | |
1010 | r = *pr; |
1011 | if (r->howto->rightshift != 0 |
1012 | || r->howto->size != 2 |
1013 | || r->howto->bitsize != 32 |
1014 | || r->howto->pc_relative |
1015 | || r->howto->bitpos != 0 |
1016 | || r->howto->dst_mask != 0xffffffff) |
1017 | { |
1018 | (*_bfd_error_handler) |
1019 | (_("Unsupported .stab relocation")("Unsupported .stab relocation")); |
1020 | bfd_set_error (bfd_error_invalid_operation); |
1021 | if (reloc_vector != NULL((void*)0)) |
1022 | free (reloc_vector); |
1023 | return FALSE0; |
1024 | } |
1025 | |
1026 | val = bfd_get_32 (abfd, info->stabs + r->address)((*((abfd)->xvec->bfd_getx32)) (info->stabs + r-> address)); |
1027 | val &= r->howto->src_mask; |
1028 | sym = *r->sym_ptr_ptr; |
1029 | val += sym->value + sym->section->vma + r->addend; |
1030 | bfd_put_32 (abfd, (bfd_vma) val, info->stabs + r->address)((*((abfd)->xvec->bfd_putx32)) (((bfd_vma) val),(info-> stabs + r->address))); |
1031 | } |
1032 | } |
1033 | |
1034 | if (reloc_vector != NULL((void*)0)) |
1035 | free (reloc_vector); |
1036 | |
1037 | /* First time through this function, build a table matching |
1038 | function VM addresses to stabs, then sort based on starting |
1039 | VM address. Do this in two passes: once to count how many |
1040 | table entries we'll need, and a second to actually build the |
1041 | table. */ |
1042 | |
1043 | info->indextablesize = 0; |
1044 | saw_fun = 1; |
1045 | for (stab = info->stabs; stab < info->stabs + stabsize; stab += STABSIZE(12)) |
1046 | { |
1047 | if (stab[TYPEOFF(4)] == (bfd_byte) N_SO) |
1048 | { |
1049 | /* N_SO with null name indicates EOF */ |
1050 | if (bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))) == 0) |
1051 | continue; |
1052 | |
1053 | /* if we did not see a function def, leave space for one. */ |
1054 | if (saw_fun == 0) |
1055 | ++info->indextablesize; |
1056 | |
1057 | saw_fun = 0; |
1058 | |
1059 | /* two N_SO's in a row is a filename and directory. Skip */ |
1060 | if (stab + STABSIZE(12) < info->stabs + stabsize |
1061 | && *(stab + STABSIZE(12) + TYPEOFF(4)) == (bfd_byte) N_SO) |
1062 | { |
1063 | stab += STABSIZE(12); |
1064 | } |
1065 | } |
1066 | else if (stab[TYPEOFF(4)] == (bfd_byte) N_FUN) |
1067 | { |
1068 | saw_fun = 1; |
1069 | ++info->indextablesize; |
1070 | } |
1071 | } |
1072 | |
1073 | if (saw_fun == 0) |
1074 | ++info->indextablesize; |
1075 | |
1076 | if (info->indextablesize == 0) |
1077 | return TRUE1; |
1078 | ++info->indextablesize; |
1079 | |
1080 | amt = info->indextablesize; |
1081 | amt *= sizeof (struct indexentry); |
1082 | info->indextable = bfd_alloc (abfd, amt); |
1083 | if (info->indextable == NULL((void*)0)) |
1084 | return FALSE0; |
1085 | |
1086 | file_name = NULL((void*)0); |
1087 | directory_name = NULL((void*)0); |
1088 | saw_fun = 1; |
1089 | |
1090 | for (i = 0, stroff = 0, stab = info->stabs, str = info->strs; |
1091 | i < info->indextablesize && stab < info->stabs + stabsize; |
1092 | stab += STABSIZE(12)) |
1093 | { |
1094 | switch (stab[TYPEOFF(4)]) |
1095 | { |
1096 | case 0: |
1097 | /* This is the first entry in a compilation unit. */ |
1098 | if ((bfd_size_type) ((info->strs + strsize) - str) < stroff) |
1099 | break; |
1100 | str += stroff; |
1101 | stroff = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); |
1102 | break; |
1103 | |
1104 | case N_SO: |
1105 | /* The main file name. */ |
1106 | |
1107 | /* The following code creates a new indextable entry with |
1108 | a NULL function name if there were no N_FUNs in a file. |
1109 | Note that a N_SO without a file name is an EOF and |
1110 | there could be 2 N_SO following it with the new filename |
1111 | and directory. */ |
1112 | if (saw_fun == 0) |
1113 | { |
1114 | info->indextable[i].val = bfd_get_32 (abfd, last_stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (last_stab + (8))); |
1115 | info->indextable[i].stab = last_stab; |
1116 | info->indextable[i].str = str; |
1117 | info->indextable[i].directory_name = directory_name; |
1118 | info->indextable[i].file_name = file_name; |
1119 | info->indextable[i].function_name = NULL((void*)0); |
1120 | ++i; |
1121 | } |
1122 | saw_fun = 0; |
1123 | |
1124 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); |
1125 | if (*file_name == '\0') |
1126 | { |
1127 | directory_name = NULL((void*)0); |
1128 | file_name = NULL((void*)0); |
1129 | saw_fun = 1; |
1130 | } |
1131 | else |
1132 | { |
1133 | last_stab = stab; |
1134 | if (stab + STABSIZE(12) >= info->stabs + stabsize |
1135 | || *(stab + STABSIZE(12) + TYPEOFF(4)) != (bfd_byte) N_SO) |
1136 | { |
1137 | directory_name = NULL((void*)0); |
1138 | } |
1139 | else |
1140 | { |
1141 | /* Two consecutive N_SOs are a directory and a |
1142 | file name. */ |
1143 | stab += STABSIZE(12); |
1144 | directory_name = file_name; |
1145 | file_name = ((char *) str |
1146 | + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0)))); |
1147 | } |
1148 | } |
1149 | break; |
1150 | |
1151 | case N_SOL: |
1152 | /* The name of an include file. */ |
1153 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); |
1154 | break; |
1155 | |
1156 | case N_FUN: |
1157 | /* A function name. */ |
1158 | saw_fun = 1; |
1159 | name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); |
1160 | |
1161 | if (*name == '\0') |
1162 | name = NULL((void*)0); |
1163 | |
1164 | function_name = name; |
1165 | |
1166 | if (name == NULL((void*)0)) |
1167 | continue; |
1168 | |
1169 | info->indextable[i].val = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); |
1170 | info->indextable[i].stab = stab; |
1171 | info->indextable[i].str = str; |
1172 | info->indextable[i].directory_name = directory_name; |
1173 | info->indextable[i].file_name = file_name; |
1174 | info->indextable[i].function_name = function_name; |
1175 | ++i; |
1176 | break; |
1177 | } |
1178 | } |
1179 | |
1180 | if (saw_fun == 0) |
1181 | { |
1182 | info->indextable[i].val = bfd_get_32 (abfd, last_stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (last_stab + (8))); |
1183 | info->indextable[i].stab = last_stab; |
1184 | info->indextable[i].str = str; |
1185 | info->indextable[i].directory_name = directory_name; |
1186 | info->indextable[i].file_name = file_name; |
1187 | info->indextable[i].function_name = NULL((void*)0); |
1188 | ++i; |
1189 | } |
1190 | |
1191 | info->indextable[i].val = (bfd_vma) -1; |
1192 | info->indextable[i].stab = info->stabs + stabsize; |
1193 | info->indextable[i].str = str; |
1194 | info->indextable[i].directory_name = NULL((void*)0); |
1195 | info->indextable[i].file_name = NULL((void*)0); |
1196 | info->indextable[i].function_name = NULL((void*)0); |
1197 | ++i; |
1198 | |
1199 | info->indextablesize = i; |
1200 | qsort (info->indextable, (size_t) i, sizeof (struct indexentry), |
1201 | cmpindexentry); |
1202 | |
1203 | *pinfo = info; |
1204 | } |
1205 | |
1206 | /* We are passed a section relative offset. The offsets in the |
1207 | stabs information are absolute. */ |
1208 | offset += bfd_get_section_vma (abfd, section)((section)->vma + 0); |
1209 | |
1210 | #ifdef ENABLE_CACHING |
1211 | if (info->cached_indexentry != NULL((void*)0) |
1212 | && offset >= info->cached_offset |
1213 | && offset < (info->cached_indexentry + 1)->val) |
1214 | { |
1215 | stab = info->cached_stab; |
1216 | indexentry = info->cached_indexentry; |
1217 | file_name = info->cached_file_name; |
1218 | } |
1219 | else |
1220 | #endif |
1221 | { |
1222 | long low, high; |
1223 | long mid = -1; |
1224 | |
1225 | /* Cache non-existent or invalid. Do binary search on |
1226 | indextable. */ |
1227 | indexentry = NULL((void*)0); |
1228 | |
1229 | low = 0; |
1230 | high = info->indextablesize - 1; |
1231 | while (low != high) |
1232 | { |
1233 | mid = (high + low) / 2; |
1234 | if (offset >= info->indextable[mid].val |
1235 | && offset < info->indextable[mid + 1].val) |
1236 | { |
1237 | indexentry = &info->indextable[mid]; |
1238 | break; |
1239 | } |
1240 | |
1241 | if (info->indextable[mid].val > offset) |
1242 | high = mid; |
1243 | else |
1244 | low = mid + 1; |
1245 | } |
1246 | |
1247 | if (indexentry == NULL((void*)0)) |
1248 | return TRUE1; |
1249 | |
1250 | stab = indexentry->stab + STABSIZE(12); |
1251 | file_name = indexentry->file_name; |
1252 | } |
1253 | |
1254 | directory_name = indexentry->directory_name; |
1255 | str = indexentry->str; |
1256 | |
1257 | saw_line = FALSE0; |
1258 | saw_func = FALSE0; |
1259 | for (; stab < (indexentry+1)->stab; stab += STABSIZE(12)) |
1260 | { |
1261 | bfd_boolean done; |
1262 | bfd_vma val; |
1263 | |
1264 | done = FALSE0; |
1265 | |
1266 | switch (stab[TYPEOFF(4)]) |
1267 | { |
1268 | case N_SOL: |
1269 | /* The name of an include file. */ |
1270 | val = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); |
1271 | if (val <= offset) |
1272 | { |
1273 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); |
1274 | *pline = 0; |
1275 | } |
1276 | break; |
1277 | |
1278 | case N_SLINE: |
1279 | case N_DSLINE: |
1280 | case N_BSLINE: |
1281 | /* A line number. If the function was specified, then the value |
1282 | is relative to the start of the function. Otherwise, the |
1283 | value is an absolute address. */ |
1284 | val = ((indexentry->function_name ? indexentry->val : 0) |
1285 | + bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8)))); |
1286 | /* If this line starts before our desired offset, or if it's |
1287 | the first line we've been able to find, use it. The |
1288 | !saw_line check works around a bug in GCC 2.95.3, which emits |
1289 | the first N_SLINE late. */ |
1290 | if (!saw_line || val <= offset) |
1291 | { |
1292 | *pline = bfd_get_16 (abfd, stab + DESCOFF)((*((abfd)->xvec->bfd_getx16)) (stab + (6))); |
1293 | |
1294 | #ifdef ENABLE_CACHING |
1295 | info->cached_stab = stab; |
1296 | info->cached_offset = val; |
1297 | info->cached_file_name = file_name; |
1298 | info->cached_indexentry = indexentry; |
1299 | #endif |
1300 | } |
1301 | if (val > offset) |
1302 | done = TRUE1; |
1303 | saw_line = TRUE1; |
1304 | break; |
1305 | |
1306 | case N_FUN: |
1307 | case N_SO: |
1308 | if (saw_func || saw_line) |
1309 | done = TRUE1; |
1310 | saw_func = TRUE1; |
1311 | break; |
1312 | } |
1313 | |
1314 | if (done) |
1315 | break; |
1316 | } |
1317 | |
1318 | *pfound = TRUE1; |
1319 | |
1320 | if (file_name == NULL((void*)0) || IS_ABSOLUTE_PATH (file_name)((((file_name)[0]) == '/')) |
1321 | || directory_name == NULL((void*)0)) |
1322 | *pfilename = file_name; |
1323 | else |
1324 | { |
1325 | size_t dirlen; |
1326 | |
1327 | dirlen = strlen (directory_name); |
1328 | if (info->filename == NULL((void*)0) |
1329 | || strncmp (info->filename, directory_name, dirlen) != 0 |
1330 | || strcmp (info->filename + dirlen, file_name) != 0) |
1331 | { |
1332 | size_t len; |
1333 | |
1334 | if (info->filename != NULL((void*)0)) |
1335 | free (info->filename); |
1336 | len = strlen (file_name) + 1; |
1337 | info->filename = bfd_malloc (dirlen + len); |
1338 | if (info->filename == NULL((void*)0)) |
1339 | return FALSE0; |
1340 | memcpy (info->filename, directory_name, dirlen); |
1341 | memcpy (info->filename + dirlen, file_name, len); |
1342 | } |
1343 | |
1344 | *pfilename = info->filename; |
1345 | } |
1346 | |
1347 | if (indexentry->function_name != NULL((void*)0)) |
1348 | { |
1349 | char *s; |
1350 | |
1351 | /* This will typically be something like main:F(0,1), so we want |
1352 | to clobber the colon. It's OK to change the name, since the |
1353 | string is in our own local storage anyhow. */ |
1354 | s = strchr (indexentry->function_name, ':'); |
1355 | if (s != NULL((void*)0)) |
1356 | *s = '\0'; |
1357 | |
1358 | *pfnname = indexentry->function_name; |
1359 | } |
1360 | |
1361 | return TRUE1; |
1362 | } |