File: | src/gnu/usr.bin/binutils-2.17/bfd/syms.c |
Warning: | line 1029, column 28 Dereference of null pointer (loaded from variable 'pr') |
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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, 2004 | |||
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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_FILE0x4000 | 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_is_target_special_symbol | |||
386 | ||||
387 | SYNOPSIS | |||
388 | bfd_boolean bfd_is_target_special_symbol (bfd *abfd, asymbol *sym); | |||
389 | ||||
390 | DESCRIPTION | |||
391 | Return TRUE iff a symbol @var{sym} in the BFD @var{abfd} is something | |||
392 | special to the particular target represented by the BFD. Such symbols | |||
393 | should normally not be mentioned to the user. | |||
394 | ||||
395 | .#define bfd_is_target_special_symbol(abfd, sym) \ | |||
396 | . BFD_SEND (abfd, _bfd_is_target_special_symbol, (abfd, sym)) | |||
397 | . | |||
398 | */ | |||
399 | ||||
400 | /* | |||
401 | FUNCTION | |||
402 | bfd_canonicalize_symtab | |||
403 | ||||
404 | DESCRIPTION | |||
405 | Read the symbols from the BFD @var{abfd}, and fills in | |||
406 | the vector @var{location} with pointers to the symbols and | |||
407 | a trailing NULL. | |||
408 | Return the actual number of symbol pointers, not | |||
409 | including the NULL. | |||
410 | ||||
411 | .#define bfd_canonicalize_symtab(abfd, location) \ | |||
412 | . BFD_SEND (abfd, _bfd_canonicalize_symtab, (abfd, location)) | |||
413 | . | |||
414 | */ | |||
415 | ||||
416 | /* | |||
417 | FUNCTION | |||
418 | bfd_set_symtab | |||
419 | ||||
420 | SYNOPSIS | |||
421 | bfd_boolean bfd_set_symtab | |||
422 | (bfd *abfd, asymbol **location, unsigned int count); | |||
423 | ||||
424 | DESCRIPTION | |||
425 | Arrange that when the output BFD @var{abfd} is closed, | |||
426 | the table @var{location} of @var{count} pointers to symbols | |||
427 | will be written. | |||
428 | */ | |||
429 | ||||
430 | bfd_boolean | |||
431 | bfd_set_symtab (bfd *abfd, asymbol **location, unsigned int symcount) | |||
432 | { | |||
433 | if (abfd->format != bfd_object || bfd_read_p (abfd)((abfd)->direction == read_direction || (abfd)->direction == both_direction)) | |||
434 | { | |||
435 | bfd_set_error (bfd_error_invalid_operation); | |||
436 | return FALSE0; | |||
437 | } | |||
438 | ||||
439 | bfd_get_outsymbols (abfd)((abfd)->outsymbols) = location; | |||
440 | bfd_get_symcount (abfd)((abfd)->symcount) = symcount; | |||
441 | return TRUE1; | |||
442 | } | |||
443 | ||||
444 | /* | |||
445 | FUNCTION | |||
446 | bfd_print_symbol_vandf | |||
447 | ||||
448 | SYNOPSIS | |||
449 | void bfd_print_symbol_vandf (bfd *abfd, void *file, asymbol *symbol); | |||
450 | ||||
451 | DESCRIPTION | |||
452 | Print the value and flags of the @var{symbol} supplied to the | |||
453 | stream @var{file}. | |||
454 | */ | |||
455 | void | |||
456 | bfd_print_symbol_vandf (bfd *abfd, void *arg, asymbol *symbol) | |||
457 | { | |||
458 | FILE *file = arg; | |||
459 | ||||
460 | flagword type = symbol->flags; | |||
461 | ||||
462 | if (symbol->section != NULL((void*)0)) | |||
463 | bfd_fprintf_vma (abfd, file, symbol->value + symbol->section->vma); | |||
464 | else | |||
465 | bfd_fprintf_vma (abfd, file, symbol->value); | |||
466 | ||||
467 | /* This presumes that a symbol can not be both BSF_DEBUGGING and | |||
468 | BSF_DYNAMIC, nor more than one of BSF_FUNCTION, BSF_FILE, and | |||
469 | BSF_OBJECT. */ | |||
470 | fprintf (file, " %c%c%c%c%c%c%c", | |||
471 | ((type & BSF_LOCAL0x01) | |||
472 | ? (type & BSF_GLOBAL0x02) ? '!' : 'l' | |||
473 | : (type & BSF_GLOBAL0x02) ? 'g' : ' '), | |||
474 | (type & BSF_WEAK0x80) ? 'w' : ' ', | |||
475 | (type & BSF_CONSTRUCTOR0x800) ? 'C' : ' ', | |||
476 | (type & BSF_WARNING0x1000) ? 'W' : ' ', | |||
477 | (type & BSF_INDIRECT0x2000) ? 'I' : ' ', | |||
478 | (type & BSF_DEBUGGING0x08) ? 'd' : (type & BSF_DYNAMIC0x8000) ? 'D' : ' ', | |||
479 | ((type & BSF_FUNCTION0x10) | |||
480 | ? 'F' | |||
481 | : ((type & BSF_FILE0x4000) | |||
482 | ? 'f' | |||
483 | : ((type & BSF_OBJECT0x10000) ? 'O' : ' ')))); | |||
484 | } | |||
485 | ||||
486 | /* | |||
487 | FUNCTION | |||
488 | bfd_make_empty_symbol | |||
489 | ||||
490 | DESCRIPTION | |||
491 | Create a new <<asymbol>> structure for the BFD @var{abfd} | |||
492 | and return a pointer to it. | |||
493 | ||||
494 | This routine is necessary because each back end has private | |||
495 | information surrounding the <<asymbol>>. Building your own | |||
496 | <<asymbol>> and pointing to it will not create the private | |||
497 | information, and will cause problems later on. | |||
498 | ||||
499 | .#define bfd_make_empty_symbol(abfd) \ | |||
500 | . BFD_SEND (abfd, _bfd_make_empty_symbol, (abfd)) | |||
501 | . | |||
502 | */ | |||
503 | ||||
504 | /* | |||
505 | FUNCTION | |||
506 | _bfd_generic_make_empty_symbol | |||
507 | ||||
508 | SYNOPSIS | |||
509 | asymbol *_bfd_generic_make_empty_symbol (bfd *); | |||
510 | ||||
511 | DESCRIPTION | |||
512 | Create a new <<asymbol>> structure for the BFD @var{abfd} | |||
513 | and return a pointer to it. Used by core file routines, | |||
514 | binary back-end and anywhere else where no private info | |||
515 | is needed. | |||
516 | */ | |||
517 | ||||
518 | asymbol * | |||
519 | _bfd_generic_make_empty_symbol (bfd *abfd) | |||
520 | { | |||
521 | bfd_size_type amt = sizeof (asymbol); | |||
522 | asymbol *new = bfd_zalloc (abfd, amt); | |||
523 | if (new) | |||
524 | new->the_bfd = abfd; | |||
525 | return new; | |||
526 | } | |||
527 | ||||
528 | /* | |||
529 | FUNCTION | |||
530 | bfd_make_debug_symbol | |||
531 | ||||
532 | DESCRIPTION | |||
533 | Create a new <<asymbol>> structure for the BFD @var{abfd}, | |||
534 | to be used as a debugging symbol. Further details of its use have | |||
535 | yet to be worked out. | |||
536 | ||||
537 | .#define bfd_make_debug_symbol(abfd,ptr,size) \ | |||
538 | . BFD_SEND (abfd, _bfd_make_debug_symbol, (abfd, ptr, size)) | |||
539 | . | |||
540 | */ | |||
541 | ||||
542 | struct section_to_type | |||
543 | { | |||
544 | const char *section; | |||
545 | char type; | |||
546 | }; | |||
547 | ||||
548 | /* Map section names to POSIX/BSD single-character symbol types. | |||
549 | This table is probably incomplete. It is sorted for convenience of | |||
550 | adding entries. Since it is so short, a linear search is used. */ | |||
551 | static const struct section_to_type stt[] = | |||
552 | { | |||
553 | {".bss", 'b'}, | |||
554 | {"code", 't'}, /* MRI .text */ | |||
555 | {".data", 'd'}, | |||
556 | {"*DEBUG*", 'N'}, | |||
557 | {".debug", 'N'}, /* MSVC's .debug (non-standard debug syms) */ | |||
558 | {".drectve", 'i'}, /* MSVC's .drective section */ | |||
559 | {".edata", 'e'}, /* MSVC's .edata (export) section */ | |||
560 | {".fini", 't'}, /* ELF fini section */ | |||
561 | {".idata", 'i'}, /* MSVC's .idata (import) section */ | |||
562 | {".init", 't'}, /* ELF init section */ | |||
563 | {".pdata", 'p'}, /* MSVC's .pdata (stack unwind) section */ | |||
564 | {".rdata", 'r'}, /* Read only data. */ | |||
565 | {".rodata", 'r'}, /* Read only data. */ | |||
566 | {".sbss", 's'}, /* Small BSS (uninitialized data). */ | |||
567 | {".scommon", 'c'}, /* Small common. */ | |||
568 | {".sdata", 'g'}, /* Small initialized data. */ | |||
569 | {".text", 't'}, | |||
570 | {"vars", 'd'}, /* MRI .data */ | |||
571 | {"zerovars", 'b'}, /* MRI .bss */ | |||
572 | {0, 0} | |||
573 | }; | |||
574 | ||||
575 | /* Return the single-character symbol type corresponding to | |||
576 | section S, or '?' for an unknown COFF section. | |||
577 | ||||
578 | Check for any leading string which matches, so .text5 returns | |||
579 | 't' as well as .text */ | |||
580 | ||||
581 | static char | |||
582 | coff_section_type (const char *s) | |||
583 | { | |||
584 | const struct section_to_type *t; | |||
585 | ||||
586 | for (t = &stt[0]; t->section; t++) | |||
587 | if (!strncmp (s, t->section, strlen (t->section))) | |||
588 | return t->type; | |||
589 | ||||
590 | return '?'; | |||
591 | } | |||
592 | ||||
593 | /* Return the single-character symbol type corresponding to section | |||
594 | SECTION, or '?' for an unknown section. This uses section flags to | |||
595 | identify sections. | |||
596 | ||||
597 | FIXME These types are unhandled: c, i, e, p. If we handled these also, | |||
598 | we could perhaps obsolete coff_section_type. */ | |||
599 | ||||
600 | static char | |||
601 | decode_section_type (const struct bfd_section *section) | |||
602 | { | |||
603 | if (section->flags & SEC_CODE0x010) | |||
604 | return 't'; | |||
605 | if (section->flags & SEC_DATA0x020) | |||
606 | { | |||
607 | if (section->flags & SEC_READONLY0x008) | |||
608 | return 'r'; | |||
609 | else if (section->flags & SEC_SMALL_DATA0x800000) | |||
610 | return 'g'; | |||
611 | else | |||
612 | return 'd'; | |||
613 | } | |||
614 | if ((section->flags & SEC_HAS_CONTENTS0x100) == 0) | |||
615 | { | |||
616 | if (section->flags & SEC_SMALL_DATA0x800000) | |||
617 | return 's'; | |||
618 | else | |||
619 | return 'b'; | |||
620 | } | |||
621 | if (section->flags & SEC_DEBUGGING0x2000) | |||
622 | return 'N'; | |||
623 | if ((section->flags & SEC_HAS_CONTENTS0x100) && (section->flags & SEC_READONLY0x008)) | |||
624 | return 'n'; | |||
625 | ||||
626 | return '?'; | |||
627 | } | |||
628 | ||||
629 | /* | |||
630 | FUNCTION | |||
631 | bfd_decode_symclass | |||
632 | ||||
633 | DESCRIPTION | |||
634 | Return a character corresponding to the symbol | |||
635 | class of @var{symbol}, or '?' for an unknown class. | |||
636 | ||||
637 | SYNOPSIS | |||
638 | int bfd_decode_symclass (asymbol *symbol); | |||
639 | */ | |||
640 | int | |||
641 | bfd_decode_symclass (asymbol *symbol) | |||
642 | { | |||
643 | char c; | |||
644 | ||||
645 | if (bfd_is_com_section (symbol->section)(((symbol->section)->flags & 0x1000) != 0)) | |||
646 | return 'C'; | |||
647 | if (bfd_is_und_section (symbol->section)((symbol->section) == ((asection *) &bfd_und_section))) | |||
648 | { | |||
649 | if (symbol->flags & BSF_WEAK0x80) | |||
650 | { | |||
651 | /* If weak, determine if it's specifically an object | |||
652 | or non-object weak. */ | |||
653 | if (symbol->flags & BSF_OBJECT0x10000) | |||
654 | return 'v'; | |||
655 | else | |||
656 | return 'w'; | |||
657 | } | |||
658 | else | |||
659 | return 'U'; | |||
660 | } | |||
661 | if (bfd_is_ind_section (symbol->section)((symbol->section) == ((asection *) &bfd_ind_section))) | |||
662 | return 'I'; | |||
663 | if (symbol->flags & BSF_WEAK0x80) | |||
664 | { | |||
665 | /* If weak, determine if it's specifically an object | |||
666 | or non-object weak. */ | |||
667 | if (symbol->flags & BSF_OBJECT0x10000) | |||
668 | return 'V'; | |||
669 | else | |||
670 | return 'W'; | |||
671 | } | |||
672 | if (!(symbol->flags & (BSF_GLOBAL0x02 | BSF_LOCAL0x01))) | |||
673 | return '?'; | |||
674 | ||||
675 | if (bfd_is_abs_section (symbol->section)((symbol->section) == ((asection *) &bfd_abs_section))) | |||
676 | c = 'a'; | |||
677 | else if (symbol->section) | |||
678 | { | |||
679 | c = coff_section_type (symbol->section->name); | |||
680 | if (c == '?') | |||
681 | c = decode_section_type (symbol->section); | |||
682 | } | |||
683 | else | |||
684 | return '?'; | |||
685 | if (symbol->flags & BSF_GLOBAL0x02) | |||
686 | c = TOUPPER (c)_sch_toupper[(c) & 0xff]; | |||
687 | return c; | |||
688 | ||||
689 | /* We don't have to handle these cases just yet, but we will soon: | |||
690 | N_SETV: 'v'; | |||
691 | N_SETA: 'l'; | |||
692 | N_SETT: 'x'; | |||
693 | N_SETD: 'z'; | |||
694 | N_SETB: 's'; | |||
695 | N_INDR: 'i'; | |||
696 | */ | |||
697 | } | |||
698 | ||||
699 | /* | |||
700 | FUNCTION | |||
701 | bfd_is_undefined_symclass | |||
702 | ||||
703 | DESCRIPTION | |||
704 | Returns non-zero if the class symbol returned by | |||
705 | bfd_decode_symclass represents an undefined symbol. | |||
706 | Returns zero otherwise. | |||
707 | ||||
708 | SYNOPSIS | |||
709 | bfd_boolean bfd_is_undefined_symclass (int symclass); | |||
710 | */ | |||
711 | ||||
712 | bfd_boolean | |||
713 | bfd_is_undefined_symclass (int symclass) | |||
714 | { | |||
715 | return symclass == 'U' || symclass == 'w' || symclass == 'v'; | |||
716 | } | |||
717 | ||||
718 | /* | |||
719 | FUNCTION | |||
720 | bfd_symbol_info | |||
721 | ||||
722 | DESCRIPTION | |||
723 | Fill in the basic info about symbol that nm needs. | |||
724 | Additional info may be added by the back-ends after | |||
725 | calling this function. | |||
726 | ||||
727 | SYNOPSIS | |||
728 | void bfd_symbol_info (asymbol *symbol, symbol_info *ret); | |||
729 | */ | |||
730 | ||||
731 | void | |||
732 | bfd_symbol_info (asymbol *symbol, symbol_info *ret) | |||
733 | { | |||
734 | ret->type = bfd_decode_symclass (symbol); | |||
735 | ||||
736 | if (bfd_is_undefined_symclass (ret->type)) | |||
737 | ret->value = 0; | |||
738 | else | |||
739 | ret->value = symbol->value + symbol->section->vma; | |||
740 | ||||
741 | ret->name = symbol->name; | |||
742 | } | |||
743 | ||||
744 | /* | |||
745 | FUNCTION | |||
746 | bfd_copy_private_symbol_data | |||
747 | ||||
748 | SYNOPSIS | |||
749 | bfd_boolean bfd_copy_private_symbol_data | |||
750 | (bfd *ibfd, asymbol *isym, bfd *obfd, asymbol *osym); | |||
751 | ||||
752 | DESCRIPTION | |||
753 | Copy private symbol information from @var{isym} in the BFD | |||
754 | @var{ibfd} to the symbol @var{osym} in the BFD @var{obfd}. | |||
755 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error | |||
756 | returns are: | |||
757 | ||||
758 | o <<bfd_error_no_memory>> - | |||
759 | Not enough memory exists to create private data for @var{osec}. | |||
760 | ||||
761 | .#define bfd_copy_private_symbol_data(ibfd, isymbol, obfd, osymbol) \ | |||
762 | . BFD_SEND (obfd, _bfd_copy_private_symbol_data, \ | |||
763 | . (ibfd, isymbol, obfd, osymbol)) | |||
764 | . | |||
765 | */ | |||
766 | ||||
767 | /* The generic version of the function which returns mini symbols. | |||
768 | This is used when the backend does not provide a more efficient | |||
769 | version. It just uses BFD asymbol structures as mini symbols. */ | |||
770 | ||||
771 | long | |||
772 | _bfd_generic_read_minisymbols (bfd *abfd, | |||
773 | bfd_boolean dynamic, | |||
774 | void **minisymsp, | |||
775 | unsigned int *sizep) | |||
776 | { | |||
777 | long storage; | |||
778 | asymbol **syms = NULL((void*)0); | |||
779 | long symcount; | |||
780 | ||||
781 | if (dynamic) | |||
782 | storage = bfd_get_dynamic_symtab_upper_bound (abfd)((*((abfd)->xvec->_bfd_get_dynamic_symtab_upper_bound)) (abfd)); | |||
783 | else | |||
784 | storage = bfd_get_symtab_upper_bound (abfd)((*((abfd)->xvec->_bfd_get_symtab_upper_bound)) (abfd)); | |||
785 | if (storage < 0) | |||
786 | goto error_return; | |||
787 | if (storage == 0) | |||
788 | return 0; | |||
789 | ||||
790 | syms = bfd_malloc (storage); | |||
791 | if (syms == NULL((void*)0)) | |||
792 | goto error_return; | |||
793 | ||||
794 | if (dynamic) | |||
795 | symcount = bfd_canonicalize_dynamic_symtab (abfd, syms)((*((abfd)->xvec->_bfd_canonicalize_dynamic_symtab)) (abfd , syms)); | |||
796 | else | |||
797 | symcount = bfd_canonicalize_symtab (abfd, syms)((*((abfd)->xvec->_bfd_canonicalize_symtab)) (abfd, syms )); | |||
798 | if (symcount < 0) | |||
799 | goto error_return; | |||
800 | ||||
801 | *minisymsp = syms; | |||
802 | *sizep = sizeof (asymbol *); | |||
803 | return symcount; | |||
804 | ||||
805 | error_return: | |||
806 | bfd_set_error (bfd_error_no_symbols); | |||
807 | if (syms != NULL((void*)0)) | |||
808 | free (syms); | |||
809 | return -1; | |||
810 | } | |||
811 | ||||
812 | /* The generic version of the function which converts a minisymbol to | |||
813 | an asymbol. We don't worry about the sym argument we are passed; | |||
814 | we just return the asymbol the minisymbol points to. */ | |||
815 | ||||
816 | asymbol * | |||
817 | _bfd_generic_minisymbol_to_symbol (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
818 | bfd_boolean dynamic ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
819 | const void *minisym, | |||
820 | asymbol *sym ATTRIBUTE_UNUSED__attribute__ ((__unused__))) | |||
821 | { | |||
822 | return *(asymbol **) minisym; | |||
823 | } | |||
824 | ||||
825 | /* Look through stabs debugging information in .stab and .stabstr | |||
826 | sections to find the source file and line closest to a desired | |||
827 | location. This is used by COFF and ELF targets. It sets *pfound | |||
828 | to TRUE if it finds some information. The *pinfo field is used to | |||
829 | pass cached information in and out of this routine; this first time | |||
830 | the routine is called for a BFD, *pinfo should be NULL. The value | |||
831 | placed in *pinfo should be saved with the BFD, and passed back each | |||
832 | time this function is called. */ | |||
833 | ||||
834 | /* We use a cache by default. */ | |||
835 | ||||
836 | #define ENABLE_CACHING | |||
837 | ||||
838 | /* We keep an array of indexentry structures to record where in the | |||
839 | stabs section we should look to find line number information for a | |||
840 | particular address. */ | |||
841 | ||||
842 | struct indexentry | |||
843 | { | |||
844 | bfd_vma val; | |||
845 | bfd_byte *stab; | |||
846 | bfd_byte *str; | |||
847 | char *directory_name; | |||
848 | char *file_name; | |||
849 | char *function_name; | |||
850 | }; | |||
851 | ||||
852 | /* Compare two indexentry structures. This is called via qsort. */ | |||
853 | ||||
854 | static int | |||
855 | cmpindexentry (const void *a, const void *b) | |||
856 | { | |||
857 | const struct indexentry *contestantA = a; | |||
858 | const struct indexentry *contestantB = b; | |||
859 | ||||
860 | if (contestantA->val < contestantB->val) | |||
861 | return -1; | |||
862 | else if (contestantA->val > contestantB->val) | |||
863 | return 1; | |||
864 | else | |||
865 | return 0; | |||
866 | } | |||
867 | ||||
868 | /* A pointer to this structure is stored in *pinfo. */ | |||
869 | ||||
870 | struct stab_find_info | |||
871 | { | |||
872 | /* The .stab section. */ | |||
873 | asection *stabsec; | |||
874 | /* The .stabstr section. */ | |||
875 | asection *strsec; | |||
876 | /* The contents of the .stab section. */ | |||
877 | bfd_byte *stabs; | |||
878 | /* The contents of the .stabstr section. */ | |||
879 | bfd_byte *strs; | |||
880 | ||||
881 | /* A table that indexes stabs by memory address. */ | |||
882 | struct indexentry *indextable; | |||
883 | /* The number of entries in indextable. */ | |||
884 | int indextablesize; | |||
885 | ||||
886 | #ifdef ENABLE_CACHING | |||
887 | /* Cached values to restart quickly. */ | |||
888 | struct indexentry *cached_indexentry; | |||
889 | bfd_vma cached_offset; | |||
890 | bfd_byte *cached_stab; | |||
891 | char *cached_file_name; | |||
892 | #endif | |||
893 | ||||
894 | /* Saved ptr to malloc'ed filename. */ | |||
895 | char *filename; | |||
896 | }; | |||
897 | ||||
898 | bfd_boolean | |||
899 | _bfd_stab_section_find_nearest_line (bfd *abfd, | |||
900 | asymbol **symbols, | |||
901 | asection *section, | |||
902 | bfd_vma offset, | |||
903 | bfd_boolean *pfound, | |||
904 | const char **pfilename, | |||
905 | const char **pfnname, | |||
906 | unsigned int *pline, | |||
907 | void **pinfo) | |||
908 | { | |||
909 | struct stab_find_info *info; | |||
910 | bfd_size_type stabsize, strsize; | |||
911 | bfd_byte *stab, *str; | |||
912 | bfd_byte *last_stab = NULL((void*)0); | |||
913 | bfd_size_type stroff; | |||
914 | struct indexentry *indexentry; | |||
915 | char *file_name; | |||
916 | char *directory_name; | |||
917 | int saw_fun; | |||
918 | bfd_boolean saw_line, saw_func; | |||
919 | ||||
920 | *pfound = FALSE0; | |||
921 | *pfilename = bfd_get_filename (abfd)((char *) (abfd)->filename); | |||
922 | *pfnname = NULL((void*)0); | |||
923 | *pline = 0; | |||
924 | ||||
925 | /* Stabs entries use a 12 byte format: | |||
926 | 4 byte string table index | |||
927 | 1 byte stab type | |||
928 | 1 byte stab other field | |||
929 | 2 byte stab desc field | |||
930 | 4 byte stab value | |||
931 | FIXME: This will have to change for a 64 bit object format. | |||
932 | ||||
933 | The stabs symbols are divided into compilation units. For the | |||
934 | first entry in each unit, the type of 0, the value is the length | |||
935 | of the string table for this unit, and the desc field is the | |||
936 | number of stabs symbols for this unit. */ | |||
937 | ||||
938 | #define STRDXOFF(0) (0) | |||
939 | #define TYPEOFF(4) (4) | |||
940 | #define OTHEROFF(5) (5) | |||
941 | #define DESCOFF(6) (6) | |||
942 | #define VALOFF(8) (8) | |||
943 | #define STABSIZE(12) (12) | |||
944 | ||||
945 | info = *pinfo; | |||
946 | if (info != NULL((void*)0)) | |||
| ||||
947 | { | |||
948 | if (info->stabsec == NULL((void*)0) || info->strsec == NULL((void*)0)) | |||
949 | { | |||
950 | /* No stabs debugging information. */ | |||
951 | return TRUE1; | |||
952 | } | |||
953 | ||||
954 | stabsize = (info->stabsec->rawsize | |||
955 | ? info->stabsec->rawsize | |||
956 | : info->stabsec->size); | |||
957 | strsize = (info->strsec->rawsize | |||
958 | ? info->strsec->rawsize | |||
959 | : info->strsec->size); | |||
960 | } | |||
961 | else | |||
962 | { | |||
963 | long reloc_size, reloc_count; | |||
964 | arelent **reloc_vector; | |||
965 | int i; | |||
966 | char *name; | |||
967 | char *function_name; | |||
968 | bfd_size_type amt = sizeof *info; | |||
969 | ||||
970 | info = bfd_zalloc (abfd, amt); | |||
971 | if (info == NULL((void*)0)) | |||
972 | return FALSE0; | |||
973 | ||||
974 | /* FIXME: When using the linker --split-by-file or | |||
975 | --split-by-reloc options, it is possible for the .stab and | |||
976 | .stabstr sections to be split. We should handle that. */ | |||
977 | ||||
978 | info->stabsec = bfd_get_section_by_name (abfd, ".stab"); | |||
979 | info->strsec = bfd_get_section_by_name (abfd, ".stabstr"); | |||
980 | ||||
981 | if (info->stabsec == NULL((void*)0) || info->strsec == NULL((void*)0)) | |||
982 | { | |||
983 | /* No stabs debugging information. Set *pinfo so that we | |||
984 | can return quickly in the info != NULL case above. */ | |||
985 | *pinfo = info; | |||
986 | return TRUE1; | |||
987 | } | |||
988 | ||||
989 | stabsize = (info->stabsec->rawsize | |||
990 | ? info->stabsec->rawsize | |||
991 | : info->stabsec->size); | |||
992 | strsize = (info->strsec->rawsize | |||
993 | ? info->strsec->rawsize | |||
994 | : info->strsec->size); | |||
995 | ||||
996 | info->stabs = bfd_alloc (abfd, stabsize); | |||
997 | info->strs = bfd_alloc (abfd, strsize); | |||
998 | if (info->stabs == NULL((void*)0) || info->strs == NULL((void*)0)) | |||
999 | return FALSE0; | |||
1000 | ||||
1001 | if (! bfd_get_section_contents (abfd, info->stabsec, info->stabs, | |||
1002 | 0, stabsize) | |||
1003 | || ! bfd_get_section_contents (abfd, info->strsec, info->strs, | |||
1004 | 0, strsize)) | |||
1005 | return FALSE0; | |||
1006 | ||||
1007 | /* If this is a relocatable object file, we have to relocate | |||
1008 | the entries in .stab. This should always be simple 32 bit | |||
1009 | relocations against symbols defined in this object file, so | |||
1010 | this should be no big deal. */ | |||
1011 | reloc_size = bfd_get_reloc_upper_bound (abfd, info->stabsec); | |||
1012 | if (reloc_size < 0) | |||
1013 | return FALSE0; | |||
1014 | reloc_vector = bfd_malloc (reloc_size); | |||
1015 | if (reloc_vector == NULL((void*)0) && reloc_size != 0) | |||
1016 | return FALSE0; | |||
1017 | reloc_count = bfd_canonicalize_reloc (abfd, info->stabsec, reloc_vector, | |||
1018 | symbols); | |||
1019 | if (reloc_count < 0) | |||
1020 | { | |||
1021 | if (reloc_vector != NULL((void*)0)) | |||
1022 | free (reloc_vector); | |||
1023 | return FALSE0; | |||
1024 | } | |||
1025 | if (reloc_count > 0) | |||
1026 | { | |||
1027 | arelent **pr; | |||
1028 | ||||
1029 | for (pr = reloc_vector; *pr != NULL((void*)0); pr++) | |||
| ||||
1030 | { | |||
1031 | arelent *r; | |||
1032 | unsigned long val; | |||
1033 | asymbol *sym; | |||
1034 | ||||
1035 | r = *pr; | |||
1036 | /* Ignore R_*_NONE relocs. */ | |||
1037 | if (r->howto->dst_mask == 0) | |||
1038 | continue; | |||
1039 | ||||
1040 | if (r->howto->rightshift != 0 | |||
1041 | || r->howto->size != 2 | |||
1042 | || r->howto->bitsize != 32 | |||
1043 | || r->howto->pc_relative | |||
1044 | || r->howto->bitpos != 0 | |||
1045 | || r->howto->dst_mask != 0xffffffff) | |||
1046 | { | |||
1047 | (*_bfd_error_handler) | |||
1048 | (_("Unsupported .stab relocation")("Unsupported .stab relocation")); | |||
1049 | bfd_set_error (bfd_error_invalid_operation); | |||
1050 | if (reloc_vector != NULL((void*)0)) | |||
1051 | free (reloc_vector); | |||
1052 | return FALSE0; | |||
1053 | } | |||
1054 | ||||
1055 | val = bfd_get_32 (abfd, info->stabs + r->address)((*((abfd)->xvec->bfd_getx32)) (info->stabs + r-> address)); | |||
1056 | val &= r->howto->src_mask; | |||
1057 | sym = *r->sym_ptr_ptr; | |||
1058 | val += sym->value + sym->section->vma + r->addend; | |||
1059 | bfd_put_32 (abfd, (bfd_vma) val, info->stabs + r->address)((*((abfd)->xvec->bfd_putx32)) (((bfd_vma) val),(info-> stabs + r->address))); | |||
1060 | } | |||
1061 | } | |||
1062 | ||||
1063 | if (reloc_vector != NULL((void*)0)) | |||
1064 | free (reloc_vector); | |||
1065 | ||||
1066 | /* First time through this function, build a table matching | |||
1067 | function VM addresses to stabs, then sort based on starting | |||
1068 | VM address. Do this in two passes: once to count how many | |||
1069 | table entries we'll need, and a second to actually build the | |||
1070 | table. */ | |||
1071 | ||||
1072 | info->indextablesize = 0; | |||
1073 | saw_fun = 1; | |||
1074 | for (stab = info->stabs; stab < info->stabs + stabsize; stab += STABSIZE(12)) | |||
1075 | { | |||
1076 | if (stab[TYPEOFF(4)] == (bfd_byte) N_SO) | |||
1077 | { | |||
1078 | /* N_SO with null name indicates EOF */ | |||
1079 | if (bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))) == 0) | |||
1080 | continue; | |||
1081 | ||||
1082 | /* if we did not see a function def, leave space for one. */ | |||
1083 | if (saw_fun == 0) | |||
1084 | ++info->indextablesize; | |||
1085 | ||||
1086 | saw_fun = 0; | |||
1087 | ||||
1088 | /* two N_SO's in a row is a filename and directory. Skip */ | |||
1089 | if (stab + STABSIZE(12) < info->stabs + stabsize | |||
1090 | && *(stab + STABSIZE(12) + TYPEOFF(4)) == (bfd_byte) N_SO) | |||
1091 | { | |||
1092 | stab += STABSIZE(12); | |||
1093 | } | |||
1094 | } | |||
1095 | else if (stab[TYPEOFF(4)] == (bfd_byte) N_FUN) | |||
1096 | { | |||
1097 | saw_fun = 1; | |||
1098 | ++info->indextablesize; | |||
1099 | } | |||
1100 | } | |||
1101 | ||||
1102 | if (saw_fun == 0) | |||
1103 | ++info->indextablesize; | |||
1104 | ||||
1105 | if (info->indextablesize == 0) | |||
1106 | return TRUE1; | |||
1107 | ++info->indextablesize; | |||
1108 | ||||
1109 | amt = info->indextablesize; | |||
1110 | amt *= sizeof (struct indexentry); | |||
1111 | info->indextable = bfd_alloc (abfd, amt); | |||
1112 | if (info->indextable == NULL((void*)0)) | |||
1113 | return FALSE0; | |||
1114 | ||||
1115 | file_name = NULL((void*)0); | |||
1116 | directory_name = NULL((void*)0); | |||
1117 | saw_fun = 1; | |||
1118 | ||||
1119 | for (i = 0, stroff = 0, stab = info->stabs, str = info->strs; | |||
1120 | i < info->indextablesize && stab < info->stabs + stabsize; | |||
1121 | stab += STABSIZE(12)) | |||
1122 | { | |||
1123 | switch (stab[TYPEOFF(4)]) | |||
1124 | { | |||
1125 | case 0: | |||
1126 | /* This is the first entry in a compilation unit. */ | |||
1127 | if ((bfd_size_type) ((info->strs + strsize) - str) < stroff) | |||
1128 | break; | |||
1129 | str += stroff; | |||
1130 | stroff = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); | |||
1131 | break; | |||
1132 | ||||
1133 | case N_SO: | |||
1134 | /* The main file name. */ | |||
1135 | ||||
1136 | /* The following code creates a new indextable entry with | |||
1137 | a NULL function name if there were no N_FUNs in a file. | |||
1138 | Note that a N_SO without a file name is an EOF and | |||
1139 | there could be 2 N_SO following it with the new filename | |||
1140 | and directory. */ | |||
1141 | if (saw_fun == 0) | |||
1142 | { | |||
1143 | info->indextable[i].val = bfd_get_32 (abfd, last_stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (last_stab + (8))); | |||
1144 | info->indextable[i].stab = last_stab; | |||
1145 | info->indextable[i].str = str; | |||
1146 | info->indextable[i].directory_name = directory_name; | |||
1147 | info->indextable[i].file_name = file_name; | |||
1148 | info->indextable[i].function_name = NULL((void*)0); | |||
1149 | ++i; | |||
1150 | } | |||
1151 | saw_fun = 0; | |||
1152 | ||||
1153 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); | |||
1154 | if (*file_name == '\0') | |||
1155 | { | |||
1156 | directory_name = NULL((void*)0); | |||
1157 | file_name = NULL((void*)0); | |||
1158 | saw_fun = 1; | |||
1159 | } | |||
1160 | else | |||
1161 | { | |||
1162 | last_stab = stab; | |||
1163 | if (stab + STABSIZE(12) >= info->stabs + stabsize | |||
1164 | || *(stab + STABSIZE(12) + TYPEOFF(4)) != (bfd_byte) N_SO) | |||
1165 | { | |||
1166 | directory_name = NULL((void*)0); | |||
1167 | } | |||
1168 | else | |||
1169 | { | |||
1170 | /* Two consecutive N_SOs are a directory and a | |||
1171 | file name. */ | |||
1172 | stab += STABSIZE(12); | |||
1173 | directory_name = file_name; | |||
1174 | file_name = ((char *) str | |||
1175 | + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0)))); | |||
1176 | } | |||
1177 | } | |||
1178 | break; | |||
1179 | ||||
1180 | case N_SOL: | |||
1181 | /* The name of an include file. */ | |||
1182 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); | |||
1183 | break; | |||
1184 | ||||
1185 | case N_FUN: | |||
1186 | /* A function name. */ | |||
1187 | saw_fun = 1; | |||
1188 | name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); | |||
1189 | ||||
1190 | if (*name == '\0') | |||
1191 | name = NULL((void*)0); | |||
1192 | ||||
1193 | function_name = name; | |||
1194 | ||||
1195 | if (name == NULL((void*)0)) | |||
1196 | continue; | |||
1197 | ||||
1198 | info->indextable[i].val = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); | |||
1199 | info->indextable[i].stab = stab; | |||
1200 | info->indextable[i].str = str; | |||
1201 | info->indextable[i].directory_name = directory_name; | |||
1202 | info->indextable[i].file_name = file_name; | |||
1203 | info->indextable[i].function_name = function_name; | |||
1204 | ++i; | |||
1205 | break; | |||
1206 | } | |||
1207 | } | |||
1208 | ||||
1209 | if (saw_fun == 0) | |||
1210 | { | |||
1211 | info->indextable[i].val = bfd_get_32 (abfd, last_stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (last_stab + (8))); | |||
1212 | info->indextable[i].stab = last_stab; | |||
1213 | info->indextable[i].str = str; | |||
1214 | info->indextable[i].directory_name = directory_name; | |||
1215 | info->indextable[i].file_name = file_name; | |||
1216 | info->indextable[i].function_name = NULL((void*)0); | |||
1217 | ++i; | |||
1218 | } | |||
1219 | ||||
1220 | info->indextable[i].val = (bfd_vma) -1; | |||
1221 | info->indextable[i].stab = info->stabs + stabsize; | |||
1222 | info->indextable[i].str = str; | |||
1223 | info->indextable[i].directory_name = NULL((void*)0); | |||
1224 | info->indextable[i].file_name = NULL((void*)0); | |||
1225 | info->indextable[i].function_name = NULL((void*)0); | |||
1226 | ++i; | |||
1227 | ||||
1228 | info->indextablesize = i; | |||
1229 | qsort (info->indextable, (size_t) i, sizeof (struct indexentry), | |||
1230 | cmpindexentry); | |||
1231 | ||||
1232 | *pinfo = info; | |||
1233 | } | |||
1234 | ||||
1235 | /* We are passed a section relative offset. The offsets in the | |||
1236 | stabs information are absolute. */ | |||
1237 | offset += bfd_get_section_vma (abfd, section)((section)->vma + 0); | |||
1238 | ||||
1239 | #ifdef ENABLE_CACHING | |||
1240 | if (info->cached_indexentry != NULL((void*)0) | |||
1241 | && offset >= info->cached_offset | |||
1242 | && offset < (info->cached_indexentry + 1)->val) | |||
1243 | { | |||
1244 | stab = info->cached_stab; | |||
1245 | indexentry = info->cached_indexentry; | |||
1246 | file_name = info->cached_file_name; | |||
1247 | } | |||
1248 | else | |||
1249 | #endif | |||
1250 | { | |||
1251 | long low, high; | |||
1252 | long mid = -1; | |||
1253 | ||||
1254 | /* Cache non-existent or invalid. Do binary search on | |||
1255 | indextable. */ | |||
1256 | indexentry = NULL((void*)0); | |||
1257 | ||||
1258 | low = 0; | |||
1259 | high = info->indextablesize - 1; | |||
1260 | while (low != high) | |||
1261 | { | |||
1262 | mid = (high + low) / 2; | |||
1263 | if (offset >= info->indextable[mid].val | |||
1264 | && offset < info->indextable[mid + 1].val) | |||
1265 | { | |||
1266 | indexentry = &info->indextable[mid]; | |||
1267 | break; | |||
1268 | } | |||
1269 | ||||
1270 | if (info->indextable[mid].val > offset) | |||
1271 | high = mid; | |||
1272 | else | |||
1273 | low = mid + 1; | |||
1274 | } | |||
1275 | ||||
1276 | if (indexentry == NULL((void*)0)) | |||
1277 | return TRUE1; | |||
1278 | ||||
1279 | stab = indexentry->stab + STABSIZE(12); | |||
1280 | file_name = indexentry->file_name; | |||
1281 | } | |||
1282 | ||||
1283 | directory_name = indexentry->directory_name; | |||
1284 | str = indexentry->str; | |||
1285 | ||||
1286 | saw_line = FALSE0; | |||
1287 | saw_func = FALSE0; | |||
1288 | for (; stab < (indexentry+1)->stab; stab += STABSIZE(12)) | |||
1289 | { | |||
1290 | bfd_boolean done; | |||
1291 | bfd_vma val; | |||
1292 | ||||
1293 | done = FALSE0; | |||
1294 | ||||
1295 | switch (stab[TYPEOFF(4)]) | |||
1296 | { | |||
1297 | case N_SOL: | |||
1298 | /* The name of an include file. */ | |||
1299 | val = bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8))); | |||
1300 | if (val <= offset) | |||
1301 | { | |||
1302 | file_name = (char *) str + bfd_get_32 (abfd, stab + STRDXOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (0))); | |||
1303 | *pline = 0; | |||
1304 | } | |||
1305 | break; | |||
1306 | ||||
1307 | case N_SLINE: | |||
1308 | case N_DSLINE: | |||
1309 | case N_BSLINE: | |||
1310 | /* A line number. If the function was specified, then the value | |||
1311 | is relative to the start of the function. Otherwise, the | |||
1312 | value is an absolute address. */ | |||
1313 | val = ((indexentry->function_name ? indexentry->val : 0) | |||
1314 | + bfd_get_32 (abfd, stab + VALOFF)((*((abfd)->xvec->bfd_getx32)) (stab + (8)))); | |||
1315 | /* If this line starts before our desired offset, or if it's | |||
1316 | the first line we've been able to find, use it. The | |||
1317 | !saw_line check works around a bug in GCC 2.95.3, which emits | |||
1318 | the first N_SLINE late. */ | |||
1319 | if (!saw_line || val <= offset) | |||
1320 | { | |||
1321 | *pline = bfd_get_16 (abfd, stab + DESCOFF)((*((abfd)->xvec->bfd_getx16)) (stab + (6))); | |||
1322 | ||||
1323 | #ifdef ENABLE_CACHING | |||
1324 | info->cached_stab = stab; | |||
1325 | info->cached_offset = val; | |||
1326 | info->cached_file_name = file_name; | |||
1327 | info->cached_indexentry = indexentry; | |||
1328 | #endif | |||
1329 | } | |||
1330 | if (val > offset) | |||
1331 | done = TRUE1; | |||
1332 | saw_line = TRUE1; | |||
1333 | break; | |||
1334 | ||||
1335 | case N_FUN: | |||
1336 | case N_SO: | |||
1337 | if (saw_func || saw_line) | |||
1338 | done = TRUE1; | |||
1339 | saw_func = TRUE1; | |||
1340 | break; | |||
1341 | } | |||
1342 | ||||
1343 | if (done) | |||
1344 | break; | |||
1345 | } | |||
1346 | ||||
1347 | *pfound = TRUE1; | |||
1348 | ||||
1349 | if (file_name == NULL((void*)0) || IS_ABSOLUTE_PATH (file_name)((((file_name)[0]) == '/')) | |||
1350 | || directory_name == NULL((void*)0)) | |||
1351 | *pfilename = file_name; | |||
1352 | else | |||
1353 | { | |||
1354 | size_t dirlen; | |||
1355 | ||||
1356 | dirlen = strlen (directory_name); | |||
1357 | if (info->filename == NULL((void*)0) | |||
1358 | || strncmp (info->filename, directory_name, dirlen) != 0 | |||
1359 | || strcmp (info->filename + dirlen, file_name) != 0) | |||
1360 | { | |||
1361 | size_t len; | |||
1362 | ||||
1363 | if (info->filename != NULL((void*)0)) | |||
1364 | free (info->filename); | |||
1365 | len = strlen (file_name) + 1; | |||
1366 | info->filename = bfd_malloc (dirlen + len); | |||
1367 | if (info->filename == NULL((void*)0)) | |||
1368 | return FALSE0; | |||
1369 | memcpy (info->filename, directory_name, dirlen); | |||
1370 | memcpy (info->filename + dirlen, file_name, len); | |||
1371 | } | |||
1372 | ||||
1373 | *pfilename = info->filename; | |||
1374 | } | |||
1375 | ||||
1376 | if (indexentry->function_name != NULL((void*)0)) | |||
1377 | { | |||
1378 | char *s; | |||
1379 | ||||
1380 | /* This will typically be something like main:F(0,1), so we want | |||
1381 | to clobber the colon. It's OK to change the name, since the | |||
1382 | string is in our own local storage anyhow. */ | |||
1383 | s = strchr (indexentry->function_name, ':'); | |||
1384 | if (s != NULL((void*)0)) | |||
1385 | *s = '\0'; | |||
1386 | ||||
1387 | *pfnname = indexentry->function_name; | |||
1388 | } | |||
1389 | ||||
1390 | return TRUE1; | |||
1391 | } |