]>
Commit | Line | Data |
---|---|---|
1 | /* Read dbx symbol tables and convert to internal format, for GDB. | |
2 | Copyright (C) 1986-2019 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* This module provides three functions: dbx_symfile_init, | |
20 | which initializes to read a symbol file; dbx_new_init, which | |
21 | discards existing cached information when all symbols are being | |
22 | discarded; and dbx_symfile_read, which reads a symbol table | |
23 | from a file. | |
24 | ||
25 | dbx_symfile_read only does the minimum work necessary for letting the | |
26 | user "name" things symbolically; it does not read the entire symtab. | |
27 | Instead, it reads the external and static symbols and puts them in partial | |
28 | symbol tables. When more extensive information is requested of a | |
29 | file, the corresponding partial symbol table is mutated into a full | |
30 | fledged symbol table by going back and reading the symbols | |
31 | for real. dbx_psymtab_to_symtab() is the function that does this */ | |
32 | ||
33 | #include "defs.h" | |
34 | #if defined(__CYGNUSCLIB__) | |
35 | #include <sys/types.h> | |
36 | #include <fcntl.h> | |
37 | #endif | |
38 | ||
39 | #include "gdb_obstack.h" | |
40 | #include <sys/stat.h> | |
41 | #include "symtab.h" | |
42 | #include "breakpoint.h" | |
43 | #include "target.h" | |
44 | #include "gdbcore.h" /* for bfd stuff */ | |
45 | #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ | |
46 | #include "filenames.h" | |
47 | #include "objfiles.h" | |
48 | #include "buildsym-legacy.h" | |
49 | #include "stabsread.h" | |
50 | #include "gdb-stabs.h" | |
51 | #include "demangle.h" | |
52 | #include "complaints.h" | |
53 | #include "cp-abi.h" | |
54 | #include "cp-support.h" | |
55 | #include "psympriv.h" | |
56 | #include "block.h" | |
57 | #include "aout/aout64.h" | |
58 | #include "aout/stab_gnu.h" /* We always use GNU stabs, not | |
59 | native, now. */ | |
60 | \f | |
61 | ||
62 | /* Key for dbx-associated data. */ | |
63 | ||
64 | const struct objfile_data *dbx_objfile_data_key; | |
65 | ||
66 | /* We put a pointer to this structure in the read_symtab_private field | |
67 | of the psymtab. */ | |
68 | ||
69 | struct symloc | |
70 | { | |
71 | /* Offset within the file symbol table of first local symbol for this | |
72 | file. */ | |
73 | ||
74 | int ldsymoff; | |
75 | ||
76 | /* Length (in bytes) of the section of the symbol table devoted to | |
77 | this file's symbols (actually, the section bracketed may contain | |
78 | more than just this file's symbols). If ldsymlen is 0, the only | |
79 | reason for this thing's existence is the dependency list. Nothing | |
80 | else will happen when it is read in. */ | |
81 | ||
82 | int ldsymlen; | |
83 | ||
84 | /* The size of each symbol in the symbol file (in external form). */ | |
85 | ||
86 | int symbol_size; | |
87 | ||
88 | /* Further information needed to locate the symbols if they are in | |
89 | an ELF file. */ | |
90 | ||
91 | int symbol_offset; | |
92 | int string_offset; | |
93 | int file_string_offset; | |
94 | enum language pst_language; | |
95 | }; | |
96 | ||
97 | #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) | |
98 | #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) | |
99 | #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) | |
100 | #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) | |
101 | #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) | |
102 | #define STRING_OFFSET(p) (SYMLOC(p)->string_offset) | |
103 | #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) | |
104 | #define PST_LANGUAGE(p) (SYMLOC(p)->pst_language) | |
105 | \f | |
106 | ||
107 | /* The objfile we are currently reading. */ | |
108 | ||
109 | static struct objfile *dbxread_objfile; | |
110 | ||
111 | /* Remember what we deduced to be the source language of this psymtab. */ | |
112 | ||
113 | static enum language psymtab_language = language_unknown; | |
114 | ||
115 | /* The BFD for this file -- implicit parameter to next_symbol_text. */ | |
116 | ||
117 | static bfd *symfile_bfd; | |
118 | ||
119 | /* The size of each symbol in the symbol file (in external form). | |
120 | This is set by dbx_symfile_read when building psymtabs, and by | |
121 | dbx_psymtab_to_symtab when building symtabs. */ | |
122 | ||
123 | static unsigned symbol_size; | |
124 | ||
125 | /* This is the offset of the symbol table in the executable file. */ | |
126 | ||
127 | static unsigned symbol_table_offset; | |
128 | ||
129 | /* This is the offset of the string table in the executable file. */ | |
130 | ||
131 | static unsigned string_table_offset; | |
132 | ||
133 | /* For elf+stab executables, the n_strx field is not a simple index | |
134 | into the string table. Instead, each .o file has a base offset in | |
135 | the string table, and the associated symbols contain offsets from | |
136 | this base. The following two variables contain the base offset for | |
137 | the current and next .o files. */ | |
138 | ||
139 | static unsigned int file_string_table_offset; | |
140 | static unsigned int next_file_string_table_offset; | |
141 | ||
142 | /* .o and NLM files contain unrelocated addresses which are based at | |
143 | 0. When non-zero, this flag disables some of the special cases for | |
144 | Solaris elf+stab text addresses at location 0. */ | |
145 | ||
146 | static int symfile_relocatable = 0; | |
147 | ||
148 | /* When set, we are processing a .o file compiled by sun acc. This is | |
149 | misnamed; it refers to all stabs-in-elf implementations which use | |
150 | N_UNDF the way Sun does, including Solaris gcc. Hopefully all | |
151 | stabs-in-elf implementations ever invented will choose to be | |
152 | compatible. */ | |
153 | ||
154 | static unsigned char processing_acc_compilation; | |
155 | ||
156 | \f | |
157 | /* The lowest text address we have yet encountered. This is needed | |
158 | because in an a.out file, there is no header field which tells us | |
159 | what address the program is actually going to be loaded at, so we | |
160 | need to make guesses based on the symbols (which *are* relocated to | |
161 | reflect the address it will be loaded at). */ | |
162 | ||
163 | static CORE_ADDR lowest_text_address; | |
164 | ||
165 | /* Non-zero if there is any line number info in the objfile. Prevents | |
166 | dbx_end_psymtab from discarding an otherwise empty psymtab. */ | |
167 | ||
168 | static int has_line_numbers; | |
169 | ||
170 | /* Complaints about the symbols we have encountered. */ | |
171 | ||
172 | static void | |
173 | unknown_symtype_complaint (const char *arg1) | |
174 | { | |
175 | complaint (_("unknown symbol type %s"), arg1); | |
176 | } | |
177 | ||
178 | static void | |
179 | lbrac_mismatch_complaint (int arg1) | |
180 | { | |
181 | complaint (_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1); | |
182 | } | |
183 | ||
184 | static void | |
185 | repeated_header_complaint (const char *arg1, int arg2) | |
186 | { | |
187 | complaint (_("\"repeated\" header file %s not " | |
188 | "previously seen, at symtab pos %d"), | |
189 | arg1, arg2); | |
190 | } | |
191 | ||
192 | /* find_text_range --- find start and end of loadable code sections | |
193 | ||
194 | The find_text_range function finds the shortest address range that | |
195 | encloses all sections containing executable code, and stores it in | |
196 | objfile's text_addr and text_size members. | |
197 | ||
198 | dbx_symfile_read will use this to finish off the partial symbol | |
199 | table, in some cases. */ | |
200 | ||
201 | static void | |
202 | find_text_range (bfd * sym_bfd, struct objfile *objfile) | |
203 | { | |
204 | asection *sec; | |
205 | int found_any = 0; | |
206 | CORE_ADDR start = 0; | |
207 | CORE_ADDR end = 0; | |
208 | ||
209 | for (sec = sym_bfd->sections; sec; sec = sec->next) | |
210 | if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE) | |
211 | { | |
212 | CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec); | |
213 | CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec); | |
214 | ||
215 | if (found_any) | |
216 | { | |
217 | if (sec_start < start) | |
218 | start = sec_start; | |
219 | if (sec_end > end) | |
220 | end = sec_end; | |
221 | } | |
222 | else | |
223 | { | |
224 | start = sec_start; | |
225 | end = sec_end; | |
226 | } | |
227 | ||
228 | found_any = 1; | |
229 | } | |
230 | ||
231 | if (!found_any) | |
232 | error (_("Can't find any code sections in symbol file")); | |
233 | ||
234 | DBX_TEXT_ADDR (objfile) = start; | |
235 | DBX_TEXT_SIZE (objfile) = end - start; | |
236 | } | |
237 | \f | |
238 | ||
239 | ||
240 | /* During initial symbol readin, we need to have a structure to keep | |
241 | track of which psymtabs have which bincls in them. This structure | |
242 | is used during readin to setup the list of dependencies within each | |
243 | partial symbol table. */ | |
244 | ||
245 | struct header_file_location | |
246 | { | |
247 | header_file_location (const char *name_, int instance_, | |
248 | struct partial_symtab *pst_) | |
249 | : name (name_), | |
250 | instance (instance_), | |
251 | pst (pst_) | |
252 | { | |
253 | } | |
254 | ||
255 | const char *name; /* Name of header file */ | |
256 | int instance; /* See above */ | |
257 | struct partial_symtab *pst; /* Partial symtab that has the | |
258 | BINCL/EINCL defs for this file. */ | |
259 | }; | |
260 | ||
261 | /* The list of bincls. */ | |
262 | static std::vector<struct header_file_location> *bincl_list; | |
263 | ||
264 | /* Local function prototypes. */ | |
265 | ||
266 | static void read_ofile_symtab (struct objfile *, struct partial_symtab *); | |
267 | ||
268 | static void dbx_read_symtab (struct partial_symtab *self, | |
269 | struct objfile *objfile); | |
270 | ||
271 | static void dbx_psymtab_to_symtab_1 (struct objfile *, struct partial_symtab *); | |
272 | ||
273 | static void read_dbx_symtab (minimal_symbol_reader &, struct objfile *); | |
274 | ||
275 | static struct partial_symtab *find_corresponding_bincl_psymtab (const char *, | |
276 | int); | |
277 | ||
278 | static const char *dbx_next_symbol_text (struct objfile *); | |
279 | ||
280 | static void fill_symbuf (bfd *); | |
281 | ||
282 | static void dbx_symfile_init (struct objfile *); | |
283 | ||
284 | static void dbx_new_init (struct objfile *); | |
285 | ||
286 | static void dbx_symfile_read (struct objfile *, symfile_add_flags); | |
287 | ||
288 | static void dbx_symfile_finish (struct objfile *); | |
289 | ||
290 | static void record_minimal_symbol (minimal_symbol_reader &, | |
291 | const char *, CORE_ADDR, int, | |
292 | struct objfile *); | |
293 | ||
294 | static void add_new_header_file (const char *, int); | |
295 | ||
296 | static void add_old_header_file (const char *, int); | |
297 | ||
298 | static void add_this_object_header_file (int); | |
299 | ||
300 | static struct partial_symtab *start_psymtab (struct objfile *, const char *, | |
301 | CORE_ADDR, int); | |
302 | ||
303 | /* Free up old header file tables. */ | |
304 | ||
305 | void | |
306 | free_header_files (void) | |
307 | { | |
308 | if (this_object_header_files) | |
309 | { | |
310 | xfree (this_object_header_files); | |
311 | this_object_header_files = NULL; | |
312 | } | |
313 | n_allocated_this_object_header_files = 0; | |
314 | } | |
315 | ||
316 | /* Allocate new header file tables. */ | |
317 | ||
318 | void | |
319 | init_header_files (void) | |
320 | { | |
321 | n_allocated_this_object_header_files = 10; | |
322 | this_object_header_files = XNEWVEC (int, 10); | |
323 | } | |
324 | ||
325 | /* Add header file number I for this object file | |
326 | at the next successive FILENUM. */ | |
327 | ||
328 | static void | |
329 | add_this_object_header_file (int i) | |
330 | { | |
331 | if (n_this_object_header_files == n_allocated_this_object_header_files) | |
332 | { | |
333 | n_allocated_this_object_header_files *= 2; | |
334 | this_object_header_files | |
335 | = (int *) xrealloc ((char *) this_object_header_files, | |
336 | n_allocated_this_object_header_files * sizeof (int)); | |
337 | } | |
338 | ||
339 | this_object_header_files[n_this_object_header_files++] = i; | |
340 | } | |
341 | ||
342 | /* Add to this file an "old" header file, one already seen in | |
343 | a previous object file. NAME is the header file's name. | |
344 | INSTANCE is its instance code, to select among multiple | |
345 | symbol tables for the same header file. */ | |
346 | ||
347 | static void | |
348 | add_old_header_file (const char *name, int instance) | |
349 | { | |
350 | struct header_file *p = HEADER_FILES (dbxread_objfile); | |
351 | int i; | |
352 | ||
353 | for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++) | |
354 | if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance) | |
355 | { | |
356 | add_this_object_header_file (i); | |
357 | return; | |
358 | } | |
359 | repeated_header_complaint (name, symnum); | |
360 | } | |
361 | ||
362 | /* Add to this file a "new" header file: definitions for its types follow. | |
363 | NAME is the header file's name. | |
364 | Most often this happens only once for each distinct header file, | |
365 | but not necessarily. If it happens more than once, INSTANCE has | |
366 | a different value each time, and references to the header file | |
367 | use INSTANCE values to select among them. | |
368 | ||
369 | dbx output contains "begin" and "end" markers for each new header file, | |
370 | but at this level we just need to know which files there have been; | |
371 | so we record the file when its "begin" is seen and ignore the "end". */ | |
372 | ||
373 | static void | |
374 | add_new_header_file (const char *name, int instance) | |
375 | { | |
376 | int i; | |
377 | struct header_file *hfile; | |
378 | ||
379 | /* Make sure there is room for one more header file. */ | |
380 | ||
381 | i = N_ALLOCATED_HEADER_FILES (dbxread_objfile); | |
382 | ||
383 | if (N_HEADER_FILES (dbxread_objfile) == i) | |
384 | { | |
385 | if (i == 0) | |
386 | { | |
387 | N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10; | |
388 | HEADER_FILES (dbxread_objfile) = (struct header_file *) | |
389 | xmalloc (10 * sizeof (struct header_file)); | |
390 | } | |
391 | else | |
392 | { | |
393 | i *= 2; | |
394 | N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i; | |
395 | HEADER_FILES (dbxread_objfile) = (struct header_file *) | |
396 | xrealloc ((char *) HEADER_FILES (dbxread_objfile), | |
397 | (i * sizeof (struct header_file))); | |
398 | } | |
399 | } | |
400 | ||
401 | /* Create an entry for this header file. */ | |
402 | ||
403 | i = N_HEADER_FILES (dbxread_objfile)++; | |
404 | hfile = HEADER_FILES (dbxread_objfile) + i; | |
405 | hfile->name = xstrdup (name); | |
406 | hfile->instance = instance; | |
407 | hfile->length = 10; | |
408 | hfile->vector = XCNEWVEC (struct type *, 10); | |
409 | ||
410 | add_this_object_header_file (i); | |
411 | } | |
412 | ||
413 | #if 0 | |
414 | static struct type ** | |
415 | explicit_lookup_type (int real_filenum, int index) | |
416 | { | |
417 | struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum]; | |
418 | ||
419 | if (index >= f->length) | |
420 | { | |
421 | f->length *= 2; | |
422 | f->vector = (struct type **) | |
423 | xrealloc (f->vector, f->length * sizeof (struct type *)); | |
424 | memset (&f->vector[f->length / 2], | |
425 | '\0', f->length * sizeof (struct type *) / 2); | |
426 | } | |
427 | return &f->vector[index]; | |
428 | } | |
429 | #endif | |
430 | \f | |
431 | static void | |
432 | record_minimal_symbol (minimal_symbol_reader &reader, | |
433 | const char *name, CORE_ADDR address, int type, | |
434 | struct objfile *objfile) | |
435 | { | |
436 | enum minimal_symbol_type ms_type; | |
437 | int section; | |
438 | ||
439 | switch (type) | |
440 | { | |
441 | case N_TEXT | N_EXT: | |
442 | ms_type = mst_text; | |
443 | section = SECT_OFF_TEXT (objfile); | |
444 | break; | |
445 | case N_DATA | N_EXT: | |
446 | ms_type = mst_data; | |
447 | section = SECT_OFF_DATA (objfile); | |
448 | break; | |
449 | case N_BSS | N_EXT: | |
450 | ms_type = mst_bss; | |
451 | section = SECT_OFF_BSS (objfile); | |
452 | break; | |
453 | case N_ABS | N_EXT: | |
454 | ms_type = mst_abs; | |
455 | section = -1; | |
456 | break; | |
457 | #ifdef N_SETV | |
458 | case N_SETV | N_EXT: | |
459 | ms_type = mst_data; | |
460 | section = SECT_OFF_DATA (objfile); | |
461 | break; | |
462 | case N_SETV: | |
463 | /* I don't think this type actually exists; since a N_SETV is the result | |
464 | of going over many .o files, it doesn't make sense to have one | |
465 | file local. */ | |
466 | ms_type = mst_file_data; | |
467 | section = SECT_OFF_DATA (objfile); | |
468 | break; | |
469 | #endif | |
470 | case N_TEXT: | |
471 | case N_NBTEXT: | |
472 | case N_FN: | |
473 | case N_FN_SEQ: | |
474 | ms_type = mst_file_text; | |
475 | section = SECT_OFF_TEXT (objfile); | |
476 | break; | |
477 | case N_DATA: | |
478 | ms_type = mst_file_data; | |
479 | ||
480 | /* Check for __DYNAMIC, which is used by Sun shared libraries. | |
481 | Record it as global even if it's local, not global, so | |
482 | lookup_minimal_symbol can find it. We don't check symbol_leading_char | |
483 | because for SunOS4 it always is '_'. */ | |
484 | if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0) | |
485 | ms_type = mst_data; | |
486 | ||
487 | /* Same with virtual function tables, both global and static. */ | |
488 | { | |
489 | const char *tempstring = name; | |
490 | ||
491 | if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) | |
492 | ++tempstring; | |
493 | if (is_vtable_name (tempstring)) | |
494 | ms_type = mst_data; | |
495 | } | |
496 | section = SECT_OFF_DATA (objfile); | |
497 | break; | |
498 | case N_BSS: | |
499 | ms_type = mst_file_bss; | |
500 | section = SECT_OFF_BSS (objfile); | |
501 | break; | |
502 | default: | |
503 | ms_type = mst_unknown; | |
504 | section = -1; | |
505 | break; | |
506 | } | |
507 | ||
508 | if ((ms_type == mst_file_text || ms_type == mst_text) | |
509 | && address < lowest_text_address) | |
510 | lowest_text_address = address; | |
511 | ||
512 | reader.record_with_info (name, address, ms_type, section); | |
513 | } | |
514 | \f | |
515 | /* Scan and build partial symbols for a symbol file. | |
516 | We have been initialized by a call to dbx_symfile_init, which | |
517 | put all the relevant info into a "struct dbx_symfile_info", | |
518 | hung off the objfile structure. */ | |
519 | ||
520 | static void | |
521 | dbx_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags) | |
522 | { | |
523 | bfd *sym_bfd; | |
524 | int val; | |
525 | ||
526 | sym_bfd = objfile->obfd; | |
527 | ||
528 | /* .o and .nlm files are relocatables with text, data and bss segs based at | |
529 | 0. This flag disables special (Solaris stabs-in-elf only) fixups for | |
530 | symbols with a value of 0. */ | |
531 | ||
532 | symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC; | |
533 | ||
534 | val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); | |
535 | if (val < 0) | |
536 | perror_with_name (objfile_name (objfile)); | |
537 | ||
538 | /* Size the symbol table. */ | |
539 | init_psymbol_list (objfile, DBX_SYMCOUNT (objfile)); | |
540 | ||
541 | symbol_size = DBX_SYMBOL_SIZE (objfile); | |
542 | symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); | |
543 | ||
544 | scoped_free_pendings free_pending; | |
545 | ||
546 | minimal_symbol_reader reader (objfile); | |
547 | ||
548 | /* Read stabs data from executable file and define symbols. */ | |
549 | ||
550 | read_dbx_symtab (reader, objfile); | |
551 | ||
552 | /* Install any minimal symbols that have been collected as the current | |
553 | minimal symbols for this objfile. */ | |
554 | ||
555 | reader.install (); | |
556 | } | |
557 | ||
558 | /* Initialize anything that needs initializing when a completely new | |
559 | symbol file is specified (not just adding some symbols from another | |
560 | file, e.g. a shared library). */ | |
561 | ||
562 | static void | |
563 | dbx_new_init (struct objfile *ignore) | |
564 | { | |
565 | stabsread_new_init (); | |
566 | init_header_files (); | |
567 | } | |
568 | ||
569 | ||
570 | /* dbx_symfile_init () | |
571 | is the dbx-specific initialization routine for reading symbols. | |
572 | It is passed a struct objfile which contains, among other things, | |
573 | the BFD for the file whose symbols are being read, and a slot for a pointer | |
574 | to "private data" which we fill with goodies. | |
575 | ||
576 | We read the string table into malloc'd space and stash a pointer to it. | |
577 | ||
578 | Since BFD doesn't know how to read debug symbols in a format-independent | |
579 | way (and may never do so...), we have to do it ourselves. We will never | |
580 | be called unless this is an a.out (or very similar) file. | |
581 | FIXME, there should be a cleaner peephole into the BFD environment here. */ | |
582 | ||
583 | #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */ | |
584 | ||
585 | static void | |
586 | dbx_symfile_init (struct objfile *objfile) | |
587 | { | |
588 | int val; | |
589 | bfd *sym_bfd = objfile->obfd; | |
590 | char *name = bfd_get_filename (sym_bfd); | |
591 | asection *text_sect; | |
592 | unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE]; | |
593 | struct dbx_symfile_info *dbx; | |
594 | ||
595 | /* Allocate struct to keep track of the symfile. */ | |
596 | dbx = XCNEW (struct dbx_symfile_info); | |
597 | set_objfile_data (objfile, dbx_objfile_data_key, dbx); | |
598 | ||
599 | DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); | |
600 | DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data"); | |
601 | DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss"); | |
602 | ||
603 | /* FIXME POKING INSIDE BFD DATA STRUCTURES. */ | |
604 | #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) | |
605 | #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) | |
606 | ||
607 | /* FIXME POKING INSIDE BFD DATA STRUCTURES. */ | |
608 | ||
609 | text_sect = bfd_get_section_by_name (sym_bfd, ".text"); | |
610 | if (!text_sect) | |
611 | error (_("Can't find .text section in symbol file")); | |
612 | DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); | |
613 | DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); | |
614 | ||
615 | DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd); | |
616 | DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); | |
617 | DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; | |
618 | ||
619 | /* Read the string table and stash it away in the objfile_obstack. | |
620 | When we blow away the objfile the string table goes away as well. | |
621 | Note that gdb used to use the results of attempting to malloc the | |
622 | string table, based on the size it read, as a form of sanity check | |
623 | for botched byte swapping, on the theory that a byte swapped string | |
624 | table size would be so totally bogus that the malloc would fail. Now | |
625 | that we put in on the objfile_obstack, we can't do this since gdb gets | |
626 | a fatal error (out of virtual memory) if the size is bogus. We can | |
627 | however at least check to see if the size is less than the size of | |
628 | the size field itself, or larger than the size of the entire file. | |
629 | Note that all valid string tables have a size greater than zero, since | |
630 | the bytes used to hold the size are included in the count. */ | |
631 | ||
632 | if (STRING_TABLE_OFFSET == 0) | |
633 | { | |
634 | /* It appears that with the existing bfd code, STRING_TABLE_OFFSET | |
635 | will never be zero, even when there is no string table. This | |
636 | would appear to be a bug in bfd. */ | |
637 | DBX_STRINGTAB_SIZE (objfile) = 0; | |
638 | DBX_STRINGTAB (objfile) = NULL; | |
639 | } | |
640 | else | |
641 | { | |
642 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); | |
643 | if (val < 0) | |
644 | perror_with_name (name); | |
645 | ||
646 | memset (size_temp, 0, sizeof (size_temp)); | |
647 | val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd); | |
648 | if (val < 0) | |
649 | { | |
650 | perror_with_name (name); | |
651 | } | |
652 | else if (val == 0) | |
653 | { | |
654 | /* With the existing bfd code, STRING_TABLE_OFFSET will be set to | |
655 | EOF if there is no string table, and attempting to read the size | |
656 | from EOF will read zero bytes. */ | |
657 | DBX_STRINGTAB_SIZE (objfile) = 0; | |
658 | DBX_STRINGTAB (objfile) = NULL; | |
659 | } | |
660 | else | |
661 | { | |
662 | /* Read some data that would appear to be the string table size. | |
663 | If there really is a string table, then it is probably the right | |
664 | size. Byteswap if necessary and validate the size. Note that | |
665 | the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some | |
666 | random data that happened to be at STRING_TABLE_OFFSET, because | |
667 | bfd can't tell us there is no string table, the sanity checks may | |
668 | or may not catch this. */ | |
669 | DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); | |
670 | ||
671 | if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp) | |
672 | || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) | |
673 | error (_("ridiculous string table size (%d bytes)."), | |
674 | DBX_STRINGTAB_SIZE (objfile)); | |
675 | ||
676 | DBX_STRINGTAB (objfile) = | |
677 | (char *) obstack_alloc (&objfile->objfile_obstack, | |
678 | DBX_STRINGTAB_SIZE (objfile)); | |
679 | OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile)); | |
680 | ||
681 | /* Now read in the string table in one big gulp. */ | |
682 | ||
683 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); | |
684 | if (val < 0) | |
685 | perror_with_name (name); | |
686 | val = bfd_bread (DBX_STRINGTAB (objfile), | |
687 | DBX_STRINGTAB_SIZE (objfile), | |
688 | sym_bfd); | |
689 | if (val != DBX_STRINGTAB_SIZE (objfile)) | |
690 | perror_with_name (name); | |
691 | } | |
692 | } | |
693 | } | |
694 | ||
695 | /* Perform any local cleanups required when we are done with a particular | |
696 | objfile. I.E, we are in the process of discarding all symbol information | |
697 | for an objfile, freeing up all memory held for it, and unlinking the | |
698 | objfile struct from the global list of known objfiles. */ | |
699 | ||
700 | static void | |
701 | dbx_symfile_finish (struct objfile *objfile) | |
702 | { | |
703 | free_header_files (); | |
704 | } | |
705 | ||
706 | static void | |
707 | dbx_free_symfile_info (struct objfile *objfile, void *arg) | |
708 | { | |
709 | struct dbx_symfile_info *dbx = (struct dbx_symfile_info *) arg; | |
710 | ||
711 | if (dbx->header_files != NULL) | |
712 | { | |
713 | int i = dbx->n_header_files; | |
714 | struct header_file *hfiles = dbx->header_files; | |
715 | ||
716 | while (--i >= 0) | |
717 | { | |
718 | xfree (hfiles[i].name); | |
719 | xfree (hfiles[i].vector); | |
720 | } | |
721 | xfree (hfiles); | |
722 | } | |
723 | ||
724 | xfree (dbx); | |
725 | } | |
726 | ||
727 | \f | |
728 | ||
729 | /* Buffer for reading the symbol table entries. */ | |
730 | static struct external_nlist symbuf[4096]; | |
731 | static int symbuf_idx; | |
732 | static int symbuf_end; | |
733 | ||
734 | /* Name of last function encountered. Used in Solaris to approximate | |
735 | object file boundaries. */ | |
736 | static const char *last_function_name; | |
737 | ||
738 | /* The address in memory of the string table of the object file we are | |
739 | reading (which might not be the "main" object file, but might be a | |
740 | shared library or some other dynamically loaded thing). This is | |
741 | set by read_dbx_symtab when building psymtabs, and by | |
742 | read_ofile_symtab when building symtabs, and is used only by | |
743 | next_symbol_text. FIXME: If that is true, we don't need it when | |
744 | building psymtabs, right? */ | |
745 | static char *stringtab_global; | |
746 | ||
747 | /* These variables are used to control fill_symbuf when the stabs | |
748 | symbols are not contiguous (as may be the case when a COFF file is | |
749 | linked using --split-by-reloc). */ | |
750 | static const std::vector<asection *> *symbuf_sections; | |
751 | static size_t sect_idx; | |
752 | static unsigned int symbuf_left; | |
753 | static unsigned int symbuf_read; | |
754 | ||
755 | /* This variable stores a global stabs buffer, if we read stabs into | |
756 | memory in one chunk in order to process relocations. */ | |
757 | static bfd_byte *stabs_data; | |
758 | ||
759 | /* Refill the symbol table input buffer | |
760 | and set the variables that control fetching entries from it. | |
761 | Reports an error if no data available. | |
762 | This function can read past the end of the symbol table | |
763 | (into the string table) but this does no harm. */ | |
764 | ||
765 | static void | |
766 | fill_symbuf (bfd *sym_bfd) | |
767 | { | |
768 | unsigned int count; | |
769 | int nbytes; | |
770 | ||
771 | if (stabs_data) | |
772 | { | |
773 | nbytes = sizeof (symbuf); | |
774 | if (nbytes > symbuf_left) | |
775 | nbytes = symbuf_left; | |
776 | memcpy (symbuf, stabs_data + symbuf_read, nbytes); | |
777 | } | |
778 | else if (symbuf_sections == NULL) | |
779 | { | |
780 | count = sizeof (symbuf); | |
781 | nbytes = bfd_bread (symbuf, count, sym_bfd); | |
782 | } | |
783 | else | |
784 | { | |
785 | if (symbuf_left <= 0) | |
786 | { | |
787 | file_ptr filepos = (*symbuf_sections)[sect_idx]->filepos; | |
788 | ||
789 | if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0) | |
790 | perror_with_name (bfd_get_filename (sym_bfd)); | |
791 | symbuf_left = bfd_section_size (sym_bfd, (*symbuf_sections)[sect_idx]); | |
792 | symbol_table_offset = filepos - symbuf_read; | |
793 | ++sect_idx; | |
794 | } | |
795 | ||
796 | count = symbuf_left; | |
797 | if (count > sizeof (symbuf)) | |
798 | count = sizeof (symbuf); | |
799 | nbytes = bfd_bread (symbuf, count, sym_bfd); | |
800 | } | |
801 | ||
802 | if (nbytes < 0) | |
803 | perror_with_name (bfd_get_filename (sym_bfd)); | |
804 | else if (nbytes == 0) | |
805 | error (_("Premature end of file reading symbol table")); | |
806 | symbuf_end = nbytes / symbol_size; | |
807 | symbuf_idx = 0; | |
808 | symbuf_left -= nbytes; | |
809 | symbuf_read += nbytes; | |
810 | } | |
811 | ||
812 | static void | |
813 | stabs_seek (int sym_offset) | |
814 | { | |
815 | if (stabs_data) | |
816 | { | |
817 | symbuf_read += sym_offset; | |
818 | symbuf_left -= sym_offset; | |
819 | } | |
820 | else | |
821 | bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); | |
822 | } | |
823 | ||
824 | #define INTERNALIZE_SYMBOL(intern, extern, abfd) \ | |
825 | { \ | |
826 | (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \ | |
827 | (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \ | |
828 | (intern).n_other = 0; \ | |
829 | (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \ | |
830 | if (bfd_get_sign_extend_vma (abfd)) \ | |
831 | (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \ | |
832 | else \ | |
833 | (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \ | |
834 | } | |
835 | ||
836 | /* Invariant: The symbol pointed to by symbuf_idx is the first one | |
837 | that hasn't been swapped. Swap the symbol at the same time | |
838 | that symbuf_idx is incremented. */ | |
839 | ||
840 | /* dbx allows the text of a symbol name to be continued into the | |
841 | next symbol name! When such a continuation is encountered | |
842 | (a \ at the end of the text of a name) | |
843 | call this function to get the continuation. */ | |
844 | ||
845 | static const char * | |
846 | dbx_next_symbol_text (struct objfile *objfile) | |
847 | { | |
848 | struct internal_nlist nlist; | |
849 | ||
850 | if (symbuf_idx == symbuf_end) | |
851 | fill_symbuf (symfile_bfd); | |
852 | ||
853 | symnum++; | |
854 | INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd); | |
855 | OBJSTAT (objfile, n_stabs++); | |
856 | ||
857 | symbuf_idx++; | |
858 | ||
859 | return nlist.n_strx + stringtab_global + file_string_table_offset; | |
860 | } | |
861 | \f | |
862 | ||
863 | /* Given a name, value pair, find the corresponding | |
864 | bincl in the list. Return the partial symtab associated | |
865 | with that header_file_location. */ | |
866 | ||
867 | static struct partial_symtab * | |
868 | find_corresponding_bincl_psymtab (const char *name, int instance) | |
869 | { | |
870 | for (const header_file_location &bincl : *bincl_list) | |
871 | if (bincl.instance == instance | |
872 | && strcmp (name, bincl.name) == 0) | |
873 | return bincl.pst; | |
874 | ||
875 | repeated_header_complaint (name, symnum); | |
876 | return (struct partial_symtab *) 0; | |
877 | } | |
878 | ||
879 | /* Set namestring based on nlist. If the string table index is invalid, | |
880 | give a fake name, and print a single error message per symbol file read, | |
881 | rather than abort the symbol reading or flood the user with messages. */ | |
882 | ||
883 | static const char * | |
884 | set_namestring (struct objfile *objfile, const struct internal_nlist *nlist) | |
885 | { | |
886 | const char *namestring; | |
887 | ||
888 | if (nlist->n_strx + file_string_table_offset | |
889 | >= DBX_STRINGTAB_SIZE (objfile) | |
890 | || nlist->n_strx + file_string_table_offset < nlist->n_strx) | |
891 | { | |
892 | complaint (_("bad string table offset in symbol %d"), | |
893 | symnum); | |
894 | namestring = "<bad string table offset>"; | |
895 | } | |
896 | else | |
897 | namestring = (nlist->n_strx + file_string_table_offset | |
898 | + DBX_STRINGTAB (objfile)); | |
899 | return namestring; | |
900 | } | |
901 | ||
902 | static struct bound_minimal_symbol | |
903 | find_stab_function (const char *namestring, const char *filename, | |
904 | struct objfile *objfile) | |
905 | { | |
906 | struct bound_minimal_symbol msym; | |
907 | int n; | |
908 | ||
909 | const char *colon = strchr (namestring, ':'); | |
910 | if (colon == NULL) | |
911 | n = 0; | |
912 | else | |
913 | n = colon - namestring; | |
914 | ||
915 | char *p = (char *) alloca (n + 2); | |
916 | strncpy (p, namestring, n); | |
917 | p[n] = 0; | |
918 | ||
919 | msym = lookup_minimal_symbol (p, filename, objfile); | |
920 | if (msym.minsym == NULL) | |
921 | { | |
922 | /* Sun Fortran appends an underscore to the minimal symbol name, | |
923 | try again with an appended underscore if the minimal symbol | |
924 | was not found. */ | |
925 | p[n] = '_'; | |
926 | p[n + 1] = 0; | |
927 | msym = lookup_minimal_symbol (p, filename, objfile); | |
928 | } | |
929 | ||
930 | if (msym.minsym == NULL && filename != NULL) | |
931 | { | |
932 | /* Try again without the filename. */ | |
933 | p[n] = 0; | |
934 | msym = lookup_minimal_symbol (p, NULL, objfile); | |
935 | } | |
936 | if (msym.minsym == NULL && filename != NULL) | |
937 | { | |
938 | /* And try again for Sun Fortran, but without the filename. */ | |
939 | p[n] = '_'; | |
940 | p[n + 1] = 0; | |
941 | msym = lookup_minimal_symbol (p, NULL, objfile); | |
942 | } | |
943 | ||
944 | return msym; | |
945 | } | |
946 | ||
947 | static void | |
948 | function_outside_compilation_unit_complaint (const char *arg1) | |
949 | { | |
950 | complaint (_("function `%s' appears to be defined " | |
951 | "outside of all compilation units"), | |
952 | arg1); | |
953 | } | |
954 | ||
955 | /* Setup partial_symtab's describing each source file for which | |
956 | debugging information is available. */ | |
957 | ||
958 | static void | |
959 | read_dbx_symtab (minimal_symbol_reader &reader, struct objfile *objfile) | |
960 | { | |
961 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
962 | struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */ | |
963 | struct internal_nlist nlist; | |
964 | CORE_ADDR text_addr; | |
965 | int text_size; | |
966 | const char *sym_name; | |
967 | int sym_len; | |
968 | ||
969 | const char *namestring; | |
970 | int nsl; | |
971 | int past_first_source_file = 0; | |
972 | CORE_ADDR last_function_start = 0; | |
973 | bfd *abfd; | |
974 | int textlow_not_set; | |
975 | int data_sect_index; | |
976 | ||
977 | /* Current partial symtab. */ | |
978 | struct partial_symtab *pst; | |
979 | ||
980 | /* List of current psymtab's include files. */ | |
981 | const char **psymtab_include_list; | |
982 | int includes_allocated; | |
983 | int includes_used; | |
984 | ||
985 | /* Index within current psymtab dependency list. */ | |
986 | struct partial_symtab **dependency_list; | |
987 | int dependencies_used, dependencies_allocated; | |
988 | ||
989 | text_addr = DBX_TEXT_ADDR (objfile); | |
990 | text_size = DBX_TEXT_SIZE (objfile); | |
991 | ||
992 | /* FIXME. We probably want to change stringtab_global rather than add this | |
993 | while processing every symbol entry. FIXME. */ | |
994 | file_string_table_offset = 0; | |
995 | next_file_string_table_offset = 0; | |
996 | ||
997 | stringtab_global = DBX_STRINGTAB (objfile); | |
998 | ||
999 | pst = (struct partial_symtab *) 0; | |
1000 | ||
1001 | includes_allocated = 30; | |
1002 | includes_used = 0; | |
1003 | psymtab_include_list = (const char **) alloca (includes_allocated * | |
1004 | sizeof (const char *)); | |
1005 | ||
1006 | dependencies_allocated = 30; | |
1007 | dependencies_used = 0; | |
1008 | dependency_list = | |
1009 | (struct partial_symtab **) alloca (dependencies_allocated * | |
1010 | sizeof (struct partial_symtab *)); | |
1011 | ||
1012 | /* Init bincl list */ | |
1013 | std::vector<struct header_file_location> bincl_storage; | |
1014 | scoped_restore restore_bincl_global | |
1015 | = make_scoped_restore (&bincl_list, &bincl_storage); | |
1016 | ||
1017 | set_last_source_file (NULL); | |
1018 | ||
1019 | lowest_text_address = (CORE_ADDR) -1; | |
1020 | ||
1021 | symfile_bfd = objfile->obfd; /* For next_text_symbol. */ | |
1022 | abfd = objfile->obfd; | |
1023 | symbuf_end = symbuf_idx = 0; | |
1024 | next_symbol_text_func = dbx_next_symbol_text; | |
1025 | textlow_not_set = 1; | |
1026 | has_line_numbers = 0; | |
1027 | ||
1028 | /* FIXME: jimb/2003-09-12: We don't apply the right section's offset | |
1029 | to global and static variables. The stab for a global or static | |
1030 | variable doesn't give us any indication of which section it's in, | |
1031 | so we can't tell immediately which offset in | |
1032 | objfile->section_offsets we should apply to the variable's | |
1033 | address. | |
1034 | ||
1035 | We could certainly find out which section contains the variable | |
1036 | by looking up the variable's unrelocated address with | |
1037 | find_pc_section, but that would be expensive; this is the | |
1038 | function that constructs the partial symbol tables by examining | |
1039 | every symbol in the entire executable, and it's | |
1040 | performance-critical. So that expense would not be welcome. I'm | |
1041 | not sure what to do about this at the moment. | |
1042 | ||
1043 | What we have done for years is to simply assume that the .data | |
1044 | section's offset is appropriate for all global and static | |
1045 | variables. Recently, this was expanded to fall back to the .bss | |
1046 | section's offset if there is no .data section, and then to the | |
1047 | .rodata section's offset. */ | |
1048 | data_sect_index = objfile->sect_index_data; | |
1049 | if (data_sect_index == -1) | |
1050 | data_sect_index = SECT_OFF_BSS (objfile); | |
1051 | if (data_sect_index == -1) | |
1052 | data_sect_index = SECT_OFF_RODATA (objfile); | |
1053 | ||
1054 | /* If data_sect_index is still -1, that's okay. It's perfectly fine | |
1055 | for the file to have no .data, no .bss, and no .text at all, if | |
1056 | it also has no global or static variables. If it does, we will | |
1057 | get an internal error from an ANOFFSET macro below when we try to | |
1058 | use data_sect_index. */ | |
1059 | ||
1060 | for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) | |
1061 | { | |
1062 | /* Get the symbol for this run and pull out some info. */ | |
1063 | QUIT; /* Allow this to be interruptable. */ | |
1064 | if (symbuf_idx == symbuf_end) | |
1065 | fill_symbuf (abfd); | |
1066 | bufp = &symbuf[symbuf_idx++]; | |
1067 | ||
1068 | /* | |
1069 | * Special case to speed up readin. | |
1070 | */ | |
1071 | if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE) | |
1072 | { | |
1073 | has_line_numbers = 1; | |
1074 | continue; | |
1075 | } | |
1076 | ||
1077 | INTERNALIZE_SYMBOL (nlist, bufp, abfd); | |
1078 | OBJSTAT (objfile, n_stabs++); | |
1079 | ||
1080 | /* Ok. There is a lot of code duplicated in the rest of this | |
1081 | switch statement (for efficiency reasons). Since I don't | |
1082 | like duplicating code, I will do my penance here, and | |
1083 | describe the code which is duplicated: | |
1084 | ||
1085 | *) The assignment to namestring. | |
1086 | *) The call to strchr. | |
1087 | *) The addition of a partial symbol the two partial | |
1088 | symbol lists. This last is a large section of code, so | |
1089 | I've imbedded it in the following macro. */ | |
1090 | ||
1091 | switch (nlist.n_type) | |
1092 | { | |
1093 | /* | |
1094 | * Standard, external, non-debugger, symbols | |
1095 | */ | |
1096 | ||
1097 | case N_TEXT | N_EXT: | |
1098 | case N_NBTEXT | N_EXT: | |
1099 | goto record_it; | |
1100 | ||
1101 | case N_DATA | N_EXT: | |
1102 | case N_NBDATA | N_EXT: | |
1103 | goto record_it; | |
1104 | ||
1105 | case N_BSS: | |
1106 | case N_BSS | N_EXT: | |
1107 | case N_NBBSS | N_EXT: | |
1108 | case N_SETV | N_EXT: /* FIXME, is this in BSS? */ | |
1109 | goto record_it; | |
1110 | ||
1111 | case N_ABS | N_EXT: | |
1112 | record_it: | |
1113 | namestring = set_namestring (objfile, &nlist); | |
1114 | ||
1115 | record_minimal_symbol (reader, namestring, nlist.n_value, | |
1116 | nlist.n_type, objfile); /* Always */ | |
1117 | continue; | |
1118 | ||
1119 | /* Standard, local, non-debugger, symbols. */ | |
1120 | ||
1121 | case N_NBTEXT: | |
1122 | ||
1123 | /* We need to be able to deal with both N_FN or N_TEXT, | |
1124 | because we have no way of knowing whether the sys-supplied ld | |
1125 | or GNU ld was used to make the executable. Sequents throw | |
1126 | in another wrinkle -- they renumbered N_FN. */ | |
1127 | ||
1128 | case N_FN: | |
1129 | case N_FN_SEQ: | |
1130 | case N_TEXT: | |
1131 | namestring = set_namestring (objfile, &nlist); | |
1132 | ||
1133 | if ((namestring[0] == '-' && namestring[1] == 'l') | |
1134 | || (namestring[(nsl = strlen (namestring)) - 1] == 'o' | |
1135 | && namestring[nsl - 2] == '.')) | |
1136 | { | |
1137 | if (past_first_source_file && pst | |
1138 | /* The gould NP1 uses low values for .o and -l symbols | |
1139 | which are not the address. */ | |
1140 | && nlist.n_value >= pst->raw_text_low ()) | |
1141 | { | |
1142 | dbx_end_psymtab (objfile, pst, psymtab_include_list, | |
1143 | includes_used, symnum * symbol_size, | |
1144 | nlist.n_value > pst->raw_text_high () | |
1145 | ? nlist.n_value : pst->raw_text_high (), | |
1146 | dependency_list, dependencies_used, | |
1147 | textlow_not_set); | |
1148 | pst = (struct partial_symtab *) 0; | |
1149 | includes_used = 0; | |
1150 | dependencies_used = 0; | |
1151 | has_line_numbers = 0; | |
1152 | } | |
1153 | else | |
1154 | past_first_source_file = 1; | |
1155 | } | |
1156 | else | |
1157 | goto record_it; | |
1158 | continue; | |
1159 | ||
1160 | case N_DATA: | |
1161 | goto record_it; | |
1162 | ||
1163 | case N_UNDF | N_EXT: | |
1164 | /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol. | |
1165 | We used to rely on the target to tell us whether it knows | |
1166 | where the symbol has been relocated to, but none of the | |
1167 | target implementations actually provided that operation. | |
1168 | So we just ignore the symbol, the same way we would do if | |
1169 | we had a target-side symbol lookup which returned no match. | |
1170 | ||
1171 | All other symbols (with nlist.n_value == 0), are really | |
1172 | undefined, and so we ignore them too. */ | |
1173 | continue; | |
1174 | ||
1175 | case N_UNDF: | |
1176 | if (processing_acc_compilation && nlist.n_strx == 1) | |
1177 | { | |
1178 | /* Deal with relative offsets in the string table | |
1179 | used in ELF+STAB under Solaris. If we want to use the | |
1180 | n_strx field, which contains the name of the file, | |
1181 | we must adjust file_string_table_offset *before* calling | |
1182 | set_namestring(). */ | |
1183 | past_first_source_file = 1; | |
1184 | file_string_table_offset = next_file_string_table_offset; | |
1185 | next_file_string_table_offset = | |
1186 | file_string_table_offset + nlist.n_value; | |
1187 | if (next_file_string_table_offset < file_string_table_offset) | |
1188 | error (_("string table offset backs up at %d"), symnum); | |
1189 | /* FIXME -- replace error() with complaint. */ | |
1190 | continue; | |
1191 | } | |
1192 | continue; | |
1193 | ||
1194 | /* Lots of symbol types we can just ignore. */ | |
1195 | ||
1196 | case N_ABS: | |
1197 | case N_NBDATA: | |
1198 | case N_NBBSS: | |
1199 | continue; | |
1200 | ||
1201 | /* Keep going . . . */ | |
1202 | ||
1203 | /* | |
1204 | * Special symbol types for GNU | |
1205 | */ | |
1206 | case N_INDR: | |
1207 | case N_INDR | N_EXT: | |
1208 | case N_SETA: | |
1209 | case N_SETA | N_EXT: | |
1210 | case N_SETT: | |
1211 | case N_SETT | N_EXT: | |
1212 | case N_SETD: | |
1213 | case N_SETD | N_EXT: | |
1214 | case N_SETB: | |
1215 | case N_SETB | N_EXT: | |
1216 | case N_SETV: | |
1217 | continue; | |
1218 | ||
1219 | /* | |
1220 | * Debugger symbols | |
1221 | */ | |
1222 | ||
1223 | case N_SO: | |
1224 | { | |
1225 | CORE_ADDR valu; | |
1226 | static int prev_so_symnum = -10; | |
1227 | static int first_so_symnum; | |
1228 | const char *p; | |
1229 | static const char *dirname_nso; | |
1230 | int prev_textlow_not_set; | |
1231 | ||
1232 | valu = nlist.n_value; | |
1233 | ||
1234 | prev_textlow_not_set = textlow_not_set; | |
1235 | ||
1236 | /* A zero value is probably an indication for the SunPRO 3.0 | |
1237 | compiler. dbx_end_psymtab explicitly tests for zero, so | |
1238 | don't relocate it. */ | |
1239 | ||
1240 | if (nlist.n_value == 0 | |
1241 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1242 | { | |
1243 | textlow_not_set = 1; | |
1244 | valu = 0; | |
1245 | } | |
1246 | else | |
1247 | textlow_not_set = 0; | |
1248 | ||
1249 | past_first_source_file = 1; | |
1250 | ||
1251 | if (prev_so_symnum != symnum - 1) | |
1252 | { /* Here if prev stab wasn't N_SO. */ | |
1253 | first_so_symnum = symnum; | |
1254 | ||
1255 | if (pst) | |
1256 | { | |
1257 | dbx_end_psymtab (objfile, pst, psymtab_include_list, | |
1258 | includes_used, symnum * symbol_size, | |
1259 | (valu > pst->raw_text_high () | |
1260 | ? valu : pst->raw_text_high ()), | |
1261 | dependency_list, dependencies_used, | |
1262 | prev_textlow_not_set); | |
1263 | pst = (struct partial_symtab *) 0; | |
1264 | includes_used = 0; | |
1265 | dependencies_used = 0; | |
1266 | has_line_numbers = 0; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | prev_so_symnum = symnum; | |
1271 | ||
1272 | /* End the current partial symtab and start a new one. */ | |
1273 | ||
1274 | namestring = set_namestring (objfile, &nlist); | |
1275 | ||
1276 | /* Null name means end of .o file. Don't start a new one. */ | |
1277 | if (*namestring == '\000') | |
1278 | continue; | |
1279 | ||
1280 | /* Some compilers (including gcc) emit a pair of initial N_SOs. | |
1281 | The first one is a directory name; the second the file name. | |
1282 | If pst exists, is empty, and has a filename ending in '/', | |
1283 | we assume the previous N_SO was a directory name. */ | |
1284 | ||
1285 | p = lbasename (namestring); | |
1286 | if (p != namestring && *p == '\000') | |
1287 | { | |
1288 | /* Save the directory name SOs locally, then save it into | |
1289 | the psymtab when it's created below. */ | |
1290 | dirname_nso = namestring; | |
1291 | continue; | |
1292 | } | |
1293 | ||
1294 | /* Some other compilers (C++ ones in particular) emit useless | |
1295 | SOs for non-existant .c files. We ignore all subsequent SOs | |
1296 | that immediately follow the first. */ | |
1297 | ||
1298 | if (!pst) | |
1299 | { | |
1300 | pst = start_psymtab (objfile, | |
1301 | namestring, valu, | |
1302 | first_so_symnum * symbol_size); | |
1303 | pst->dirname = dirname_nso; | |
1304 | dirname_nso = NULL; | |
1305 | } | |
1306 | continue; | |
1307 | } | |
1308 | ||
1309 | case N_BINCL: | |
1310 | { | |
1311 | enum language tmp_language; | |
1312 | ||
1313 | /* Add this bincl to the bincl_list for future EXCLs. No | |
1314 | need to save the string; it'll be around until | |
1315 | read_dbx_symtab function returns. */ | |
1316 | ||
1317 | namestring = set_namestring (objfile, &nlist); | |
1318 | tmp_language = deduce_language_from_filename (namestring); | |
1319 | ||
1320 | /* Only change the psymtab's language if we've learned | |
1321 | something useful (eg. tmp_language is not language_unknown). | |
1322 | In addition, to match what start_subfile does, never change | |
1323 | from C++ to C. */ | |
1324 | if (tmp_language != language_unknown | |
1325 | && (tmp_language != language_c | |
1326 | || psymtab_language != language_cplus)) | |
1327 | psymtab_language = tmp_language; | |
1328 | ||
1329 | if (pst == NULL) | |
1330 | { | |
1331 | /* FIXME: we should not get here without a PST to work on. | |
1332 | Attempt to recover. */ | |
1333 | complaint (_("N_BINCL %s not in entries for " | |
1334 | "any file, at symtab pos %d"), | |
1335 | namestring, symnum); | |
1336 | continue; | |
1337 | } | |
1338 | bincl_list->emplace_back (namestring, nlist.n_value, pst); | |
1339 | ||
1340 | /* Mark down an include file in the current psymtab. */ | |
1341 | ||
1342 | goto record_include_file; | |
1343 | } | |
1344 | ||
1345 | case N_SOL: | |
1346 | { | |
1347 | enum language tmp_language; | |
1348 | ||
1349 | /* Mark down an include file in the current psymtab. */ | |
1350 | namestring = set_namestring (objfile, &nlist); | |
1351 | tmp_language = deduce_language_from_filename (namestring); | |
1352 | ||
1353 | /* Only change the psymtab's language if we've learned | |
1354 | something useful (eg. tmp_language is not language_unknown). | |
1355 | In addition, to match what start_subfile does, never change | |
1356 | from C++ to C. */ | |
1357 | if (tmp_language != language_unknown | |
1358 | && (tmp_language != language_c | |
1359 | || psymtab_language != language_cplus)) | |
1360 | psymtab_language = tmp_language; | |
1361 | ||
1362 | /* In C++, one may expect the same filename to come round many | |
1363 | times, when code is coming alternately from the main file | |
1364 | and from inline functions in other files. So I check to see | |
1365 | if this is a file we've seen before -- either the main | |
1366 | source file, or a previously included file. | |
1367 | ||
1368 | This seems to be a lot of time to be spending on N_SOL, but | |
1369 | things like "break c-exp.y:435" need to work (I | |
1370 | suppose the psymtab_include_list could be hashed or put | |
1371 | in a binary tree, if profiling shows this is a major hog). */ | |
1372 | if (pst && filename_cmp (namestring, pst->filename) == 0) | |
1373 | continue; | |
1374 | { | |
1375 | int i; | |
1376 | ||
1377 | for (i = 0; i < includes_used; i++) | |
1378 | if (filename_cmp (namestring, psymtab_include_list[i]) == 0) | |
1379 | { | |
1380 | i = -1; | |
1381 | break; | |
1382 | } | |
1383 | if (i == -1) | |
1384 | continue; | |
1385 | } | |
1386 | ||
1387 | record_include_file: | |
1388 | ||
1389 | psymtab_include_list[includes_used++] = namestring; | |
1390 | if (includes_used >= includes_allocated) | |
1391 | { | |
1392 | const char **orig = psymtab_include_list; | |
1393 | ||
1394 | psymtab_include_list = (const char **) | |
1395 | alloca ((includes_allocated *= 2) * sizeof (const char *)); | |
1396 | memcpy (psymtab_include_list, orig, | |
1397 | includes_used * sizeof (const char *)); | |
1398 | } | |
1399 | continue; | |
1400 | } | |
1401 | case N_LSYM: /* Typedef or automatic variable. */ | |
1402 | case N_STSYM: /* Data seg var -- static. */ | |
1403 | case N_LCSYM: /* BSS " */ | |
1404 | case N_ROSYM: /* Read-only data seg var -- static. */ | |
1405 | case N_NBSTS: /* Gould nobase. */ | |
1406 | case N_NBLCS: /* symbols. */ | |
1407 | case N_FUN: | |
1408 | case N_GSYM: /* Global (extern) variable; can be | |
1409 | data or bss (sigh FIXME). */ | |
1410 | ||
1411 | /* Following may probably be ignored; I'll leave them here | |
1412 | for now (until I do Pascal and Modula 2 extensions). */ | |
1413 | ||
1414 | case N_PC: /* I may or may not need this; I | |
1415 | suspect not. */ | |
1416 | case N_M2C: /* I suspect that I can ignore this here. */ | |
1417 | case N_SCOPE: /* Same. */ | |
1418 | { | |
1419 | const char *p; | |
1420 | ||
1421 | namestring = set_namestring (objfile, &nlist); | |
1422 | ||
1423 | /* See if this is an end of function stab. */ | |
1424 | if (pst && nlist.n_type == N_FUN && *namestring == '\000') | |
1425 | { | |
1426 | CORE_ADDR valu; | |
1427 | ||
1428 | /* It's value is the size (in bytes) of the function for | |
1429 | function relative stabs, or the address of the function's | |
1430 | end for old style stabs. */ | |
1431 | valu = nlist.n_value + last_function_start; | |
1432 | if (pst->raw_text_high () == 0 || valu > pst->raw_text_high ()) | |
1433 | pst->set_text_high (valu); | |
1434 | break; | |
1435 | } | |
1436 | ||
1437 | p = (char *) strchr (namestring, ':'); | |
1438 | if (!p) | |
1439 | continue; /* Not a debugging symbol. */ | |
1440 | ||
1441 | sym_len = 0; | |
1442 | sym_name = NULL; /* pacify "gcc -Werror" */ | |
1443 | if (psymtab_language == language_cplus) | |
1444 | { | |
1445 | std::string name (namestring, p - namestring); | |
1446 | std::string new_name = cp_canonicalize_string (name.c_str ()); | |
1447 | if (!new_name.empty ()) | |
1448 | { | |
1449 | sym_len = new_name.length (); | |
1450 | sym_name = (char *) obstack_copy0 (&objfile->objfile_obstack, | |
1451 | new_name.c_str (), | |
1452 | sym_len); | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | if (sym_len == 0) | |
1457 | { | |
1458 | sym_name = namestring; | |
1459 | sym_len = p - namestring; | |
1460 | } | |
1461 | ||
1462 | /* Main processing section for debugging symbols which | |
1463 | the initial read through the symbol tables needs to worry | |
1464 | about. If we reach this point, the symbol which we are | |
1465 | considering is definitely one we are interested in. | |
1466 | p must also contain the (valid) index into the namestring | |
1467 | which indicates the debugging type symbol. */ | |
1468 | ||
1469 | switch (p[1]) | |
1470 | { | |
1471 | case 'S': | |
1472 | if (gdbarch_static_transform_name_p (gdbarch)) | |
1473 | gdbarch_static_transform_name (gdbarch, namestring); | |
1474 | ||
1475 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1476 | VAR_DOMAIN, LOC_STATIC, | |
1477 | data_sect_index, | |
1478 | psymbol_placement::STATIC, | |
1479 | nlist.n_value, psymtab_language, objfile); | |
1480 | continue; | |
1481 | ||
1482 | case 'G': | |
1483 | /* The addresses in these entries are reported to be | |
1484 | wrong. See the code that reads 'G's for symtabs. */ | |
1485 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1486 | VAR_DOMAIN, LOC_STATIC, | |
1487 | data_sect_index, | |
1488 | psymbol_placement::GLOBAL, | |
1489 | nlist.n_value, psymtab_language, objfile); | |
1490 | continue; | |
1491 | ||
1492 | case 'T': | |
1493 | /* When a 'T' entry is defining an anonymous enum, it | |
1494 | may have a name which is the empty string, or a | |
1495 | single space. Since they're not really defining a | |
1496 | symbol, those shouldn't go in the partial symbol | |
1497 | table. We do pick up the elements of such enums at | |
1498 | 'check_enum:', below. */ | |
1499 | if (p >= namestring + 2 | |
1500 | || (p == namestring + 1 | |
1501 | && namestring[0] != ' ')) | |
1502 | { | |
1503 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1504 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, | |
1505 | psymbol_placement::STATIC, | |
1506 | 0, psymtab_language, objfile); | |
1507 | if (p[2] == 't') | |
1508 | { | |
1509 | /* Also a typedef with the same name. */ | |
1510 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1511 | VAR_DOMAIN, LOC_TYPEDEF, -1, | |
1512 | psymbol_placement::STATIC, | |
1513 | 0, psymtab_language, objfile); | |
1514 | p += 1; | |
1515 | } | |
1516 | } | |
1517 | goto check_enum; | |
1518 | ||
1519 | case 't': | |
1520 | if (p != namestring) /* a name is there, not just :T... */ | |
1521 | { | |
1522 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1523 | VAR_DOMAIN, LOC_TYPEDEF, -1, | |
1524 | psymbol_placement::STATIC, | |
1525 | 0, psymtab_language, objfile); | |
1526 | } | |
1527 | check_enum: | |
1528 | /* If this is an enumerated type, we need to | |
1529 | add all the enum constants to the partial symbol | |
1530 | table. This does not cover enums without names, e.g. | |
1531 | "enum {a, b} c;" in C, but fortunately those are | |
1532 | rare. There is no way for GDB to find those from the | |
1533 | enum type without spending too much time on it. Thus | |
1534 | to solve this problem, the compiler needs to put out the | |
1535 | enum in a nameless type. GCC2 does this. */ | |
1536 | ||
1537 | /* We are looking for something of the form | |
1538 | <name> ":" ("t" | "T") [<number> "="] "e" | |
1539 | {<constant> ":" <value> ","} ";". */ | |
1540 | ||
1541 | /* Skip over the colon and the 't' or 'T'. */ | |
1542 | p += 2; | |
1543 | /* This type may be given a number. Also, numbers can come | |
1544 | in pairs like (0,26). Skip over it. */ | |
1545 | while ((*p >= '0' && *p <= '9') | |
1546 | || *p == '(' || *p == ',' || *p == ')' | |
1547 | || *p == '=') | |
1548 | p++; | |
1549 | ||
1550 | if (*p++ == 'e') | |
1551 | { | |
1552 | /* The aix4 compiler emits extra crud before the members. */ | |
1553 | if (*p == '-') | |
1554 | { | |
1555 | /* Skip over the type (?). */ | |
1556 | while (*p != ':') | |
1557 | p++; | |
1558 | ||
1559 | /* Skip over the colon. */ | |
1560 | p++; | |
1561 | } | |
1562 | ||
1563 | /* We have found an enumerated type. */ | |
1564 | /* According to comments in read_enum_type | |
1565 | a comma could end it instead of a semicolon. | |
1566 | I don't know where that happens. | |
1567 | Accept either. */ | |
1568 | while (*p && *p != ';' && *p != ',') | |
1569 | { | |
1570 | const char *q; | |
1571 | ||
1572 | /* Check for and handle cretinous dbx symbol name | |
1573 | continuation! */ | |
1574 | if (*p == '\\' || (*p == '?' && p[1] == '\0')) | |
1575 | p = next_symbol_text (objfile); | |
1576 | ||
1577 | /* Point to the character after the name | |
1578 | of the enum constant. */ | |
1579 | for (q = p; *q && *q != ':'; q++) | |
1580 | ; | |
1581 | /* Note that the value doesn't matter for | |
1582 | enum constants in psymtabs, just in symtabs. */ | |
1583 | add_psymbol_to_list (p, q - p, 1, | |
1584 | VAR_DOMAIN, LOC_CONST, -1, | |
1585 | psymbol_placement::STATIC, 0, | |
1586 | psymtab_language, objfile); | |
1587 | /* Point past the name. */ | |
1588 | p = q; | |
1589 | /* Skip over the value. */ | |
1590 | while (*p && *p != ',') | |
1591 | p++; | |
1592 | /* Advance past the comma. */ | |
1593 | if (*p) | |
1594 | p++; | |
1595 | } | |
1596 | } | |
1597 | continue; | |
1598 | ||
1599 | case 'c': | |
1600 | /* Constant, e.g. from "const" in Pascal. */ | |
1601 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1602 | VAR_DOMAIN, LOC_CONST, -1, | |
1603 | psymbol_placement::STATIC, 0, | |
1604 | psymtab_language, objfile); | |
1605 | continue; | |
1606 | ||
1607 | case 'f': | |
1608 | if (! pst) | |
1609 | { | |
1610 | int name_len = p - namestring; | |
1611 | char *name = (char *) xmalloc (name_len + 1); | |
1612 | ||
1613 | memcpy (name, namestring, name_len); | |
1614 | name[name_len] = '\0'; | |
1615 | function_outside_compilation_unit_complaint (name); | |
1616 | xfree (name); | |
1617 | } | |
1618 | /* Kludges for ELF/STABS with Sun ACC. */ | |
1619 | last_function_name = namestring; | |
1620 | /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit | |
1621 | value for the bottom of the text seg in those cases. */ | |
1622 | if (nlist.n_value == 0 | |
1623 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1624 | { | |
1625 | struct bound_minimal_symbol minsym | |
1626 | = find_stab_function (namestring, | |
1627 | pst ? pst->filename : NULL, | |
1628 | objfile); | |
1629 | if (minsym.minsym != NULL) | |
1630 | nlist.n_value = MSYMBOL_VALUE_RAW_ADDRESS (minsym.minsym); | |
1631 | } | |
1632 | if (pst && textlow_not_set | |
1633 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1634 | { | |
1635 | pst->set_text_low (nlist.n_value); | |
1636 | textlow_not_set = 0; | |
1637 | } | |
1638 | /* End kludge. */ | |
1639 | ||
1640 | /* Keep track of the start of the last function so we | |
1641 | can handle end of function symbols. */ | |
1642 | last_function_start = nlist.n_value; | |
1643 | ||
1644 | /* In reordered executables this function may lie outside | |
1645 | the bounds created by N_SO symbols. If that's the case | |
1646 | use the address of this function as the low bound for | |
1647 | the partial symbol table. */ | |
1648 | if (pst | |
1649 | && (textlow_not_set | |
1650 | || (nlist.n_value < pst->raw_text_low () | |
1651 | && (nlist.n_value != 0)))) | |
1652 | { | |
1653 | pst->set_text_low (nlist.n_value); | |
1654 | textlow_not_set = 0; | |
1655 | } | |
1656 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1657 | VAR_DOMAIN, LOC_BLOCK, | |
1658 | SECT_OFF_TEXT (objfile), | |
1659 | psymbol_placement::STATIC, | |
1660 | nlist.n_value, psymtab_language, objfile); | |
1661 | continue; | |
1662 | ||
1663 | /* Global functions were ignored here, but now they | |
1664 | are put into the global psymtab like one would expect. | |
1665 | They're also in the minimal symbol table. */ | |
1666 | case 'F': | |
1667 | if (! pst) | |
1668 | { | |
1669 | int name_len = p - namestring; | |
1670 | char *name = (char *) xmalloc (name_len + 1); | |
1671 | ||
1672 | memcpy (name, namestring, name_len); | |
1673 | name[name_len] = '\0'; | |
1674 | function_outside_compilation_unit_complaint (name); | |
1675 | xfree (name); | |
1676 | } | |
1677 | /* Kludges for ELF/STABS with Sun ACC. */ | |
1678 | last_function_name = namestring; | |
1679 | /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit | |
1680 | value for the bottom of the text seg in those cases. */ | |
1681 | if (nlist.n_value == 0 | |
1682 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1683 | { | |
1684 | struct bound_minimal_symbol minsym | |
1685 | = find_stab_function (namestring, | |
1686 | pst ? pst->filename : NULL, | |
1687 | objfile); | |
1688 | if (minsym.minsym != NULL) | |
1689 | nlist.n_value = MSYMBOL_VALUE_RAW_ADDRESS (minsym.minsym); | |
1690 | } | |
1691 | if (pst && textlow_not_set | |
1692 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1693 | { | |
1694 | pst->set_text_low (nlist.n_value); | |
1695 | textlow_not_set = 0; | |
1696 | } | |
1697 | /* End kludge. */ | |
1698 | ||
1699 | /* Keep track of the start of the last function so we | |
1700 | can handle end of function symbols. */ | |
1701 | last_function_start = nlist.n_value; | |
1702 | ||
1703 | /* In reordered executables this function may lie outside | |
1704 | the bounds created by N_SO symbols. If that's the case | |
1705 | use the address of this function as the low bound for | |
1706 | the partial symbol table. */ | |
1707 | if (pst | |
1708 | && (textlow_not_set | |
1709 | || (nlist.n_value < pst->raw_text_low () | |
1710 | && (nlist.n_value != 0)))) | |
1711 | { | |
1712 | pst->set_text_low (nlist.n_value); | |
1713 | textlow_not_set = 0; | |
1714 | } | |
1715 | add_psymbol_to_list (sym_name, sym_len, 1, | |
1716 | VAR_DOMAIN, LOC_BLOCK, | |
1717 | SECT_OFF_TEXT (objfile), | |
1718 | psymbol_placement::GLOBAL, | |
1719 | nlist.n_value, psymtab_language, objfile); | |
1720 | continue; | |
1721 | ||
1722 | /* Two things show up here (hopefully); static symbols of | |
1723 | local scope (static used inside braces) or extensions | |
1724 | of structure symbols. We can ignore both. */ | |
1725 | case 'V': | |
1726 | case '(': | |
1727 | case '0': | |
1728 | case '1': | |
1729 | case '2': | |
1730 | case '3': | |
1731 | case '4': | |
1732 | case '5': | |
1733 | case '6': | |
1734 | case '7': | |
1735 | case '8': | |
1736 | case '9': | |
1737 | case '-': | |
1738 | case '#': /* For symbol identification (used in live ranges). */ | |
1739 | continue; | |
1740 | ||
1741 | case ':': | |
1742 | /* It is a C++ nested symbol. We don't need to record it | |
1743 | (I don't think); if we try to look up foo::bar::baz, | |
1744 | then symbols for the symtab containing foo should get | |
1745 | read in, I think. */ | |
1746 | /* Someone says sun cc puts out symbols like | |
1747 | /foo/baz/maclib::/usr/local/bin/maclib, | |
1748 | which would get here with a symbol type of ':'. */ | |
1749 | continue; | |
1750 | ||
1751 | default: | |
1752 | /* Unexpected symbol descriptor. The second and subsequent stabs | |
1753 | of a continued stab can show up here. The question is | |
1754 | whether they ever can mimic a normal stab--it would be | |
1755 | nice if not, since we certainly don't want to spend the | |
1756 | time searching to the end of every string looking for | |
1757 | a backslash. */ | |
1758 | ||
1759 | complaint (_("unknown symbol descriptor `%c'"), | |
1760 | p[1]); | |
1761 | ||
1762 | /* Ignore it; perhaps it is an extension that we don't | |
1763 | know about. */ | |
1764 | continue; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | case N_EXCL: | |
1769 | ||
1770 | namestring = set_namestring (objfile, &nlist); | |
1771 | ||
1772 | /* Find the corresponding bincl and mark that psymtab on the | |
1773 | psymtab dependency list. */ | |
1774 | { | |
1775 | struct partial_symtab *needed_pst = | |
1776 | find_corresponding_bincl_psymtab (namestring, nlist.n_value); | |
1777 | ||
1778 | /* If this include file was defined earlier in this file, | |
1779 | leave it alone. */ | |
1780 | if (needed_pst == pst) | |
1781 | continue; | |
1782 | ||
1783 | if (needed_pst) | |
1784 | { | |
1785 | int i; | |
1786 | int found = 0; | |
1787 | ||
1788 | for (i = 0; i < dependencies_used; i++) | |
1789 | if (dependency_list[i] == needed_pst) | |
1790 | { | |
1791 | found = 1; | |
1792 | break; | |
1793 | } | |
1794 | ||
1795 | /* If it's already in the list, skip the rest. */ | |
1796 | if (found) | |
1797 | continue; | |
1798 | ||
1799 | dependency_list[dependencies_used++] = needed_pst; | |
1800 | if (dependencies_used >= dependencies_allocated) | |
1801 | { | |
1802 | struct partial_symtab **orig = dependency_list; | |
1803 | ||
1804 | dependency_list = | |
1805 | (struct partial_symtab **) | |
1806 | alloca ((dependencies_allocated *= 2) | |
1807 | * sizeof (struct partial_symtab *)); | |
1808 | memcpy (dependency_list, orig, | |
1809 | (dependencies_used | |
1810 | * sizeof (struct partial_symtab *))); | |
1811 | #ifdef DEBUG_INFO | |
1812 | fprintf_unfiltered (gdb_stderr, | |
1813 | "Had to reallocate " | |
1814 | "dependency list.\n"); | |
1815 | fprintf_unfiltered (gdb_stderr, | |
1816 | "New dependencies allocated: %d\n", | |
1817 | dependencies_allocated); | |
1818 | #endif | |
1819 | } | |
1820 | } | |
1821 | } | |
1822 | continue; | |
1823 | ||
1824 | case N_ENDM: | |
1825 | /* Solaris 2 end of module, finish current partial symbol | |
1826 | table. dbx_end_psymtab will set the high text address of | |
1827 | PST to the proper value, which is necessary if a module | |
1828 | compiled without debugging info follows this module. */ | |
1829 | if (pst && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1830 | { | |
1831 | dbx_end_psymtab (objfile, pst, | |
1832 | psymtab_include_list, includes_used, | |
1833 | symnum * symbol_size, | |
1834 | (CORE_ADDR) 0, dependency_list, | |
1835 | dependencies_used, textlow_not_set); | |
1836 | pst = (struct partial_symtab *) 0; | |
1837 | includes_used = 0; | |
1838 | dependencies_used = 0; | |
1839 | has_line_numbers = 0; | |
1840 | } | |
1841 | continue; | |
1842 | ||
1843 | case N_RBRAC: | |
1844 | #ifdef HANDLE_RBRAC | |
1845 | HANDLE_RBRAC (nlist.n_value); | |
1846 | continue; | |
1847 | #endif | |
1848 | case N_EINCL: | |
1849 | case N_DSLINE: | |
1850 | case N_BSLINE: | |
1851 | case N_SSYM: /* Claim: Structure or union element. | |
1852 | Hopefully, I can ignore this. */ | |
1853 | case N_ENTRY: /* Alternate entry point; can ignore. */ | |
1854 | case N_MAIN: /* Can definitely ignore this. */ | |
1855 | case N_CATCH: /* These are GNU C++ extensions */ | |
1856 | case N_EHDECL: /* that can safely be ignored here. */ | |
1857 | case N_LENG: | |
1858 | case N_BCOMM: | |
1859 | case N_ECOMM: | |
1860 | case N_ECOML: | |
1861 | case N_FNAME: | |
1862 | case N_SLINE: | |
1863 | case N_RSYM: | |
1864 | case N_PSYM: | |
1865 | case N_BNSYM: | |
1866 | case N_ENSYM: | |
1867 | case N_LBRAC: | |
1868 | case N_NSYMS: /* Ultrix 4.0: symbol count */ | |
1869 | case N_DEFD: /* GNU Modula-2 */ | |
1870 | case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ | |
1871 | ||
1872 | case N_OBJ: /* Useless types from Solaris. */ | |
1873 | case N_OPT: | |
1874 | case N_PATCH: | |
1875 | /* These symbols aren't interesting; don't worry about them. */ | |
1876 | continue; | |
1877 | ||
1878 | default: | |
1879 | /* If we haven't found it yet, ignore it. It's probably some | |
1880 | new type we don't know about yet. */ | |
1881 | unknown_symtype_complaint (hex_string (nlist.n_type)); | |
1882 | continue; | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | /* If there's stuff to be cleaned up, clean it up. */ | |
1887 | if (pst) | |
1888 | { | |
1889 | /* Don't set high text address of PST lower than it already | |
1890 | is. */ | |
1891 | CORE_ADDR text_end = | |
1892 | (lowest_text_address == (CORE_ADDR) -1 | |
1893 | ? text_addr | |
1894 | : lowest_text_address) | |
1895 | + text_size; | |
1896 | ||
1897 | dbx_end_psymtab (objfile, pst, psymtab_include_list, includes_used, | |
1898 | symnum * symbol_size, | |
1899 | (text_end > pst->raw_text_high () | |
1900 | ? text_end : pst->raw_text_high ()), | |
1901 | dependency_list, dependencies_used, textlow_not_set); | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | /* Allocate and partially fill a partial symtab. It will be | |
1906 | completely filled at the end of the symbol list. | |
1907 | ||
1908 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
1909 | is the address relative to which its symbols are (incremental) or 0 | |
1910 | (normal). */ | |
1911 | ||
1912 | static struct partial_symtab * | |
1913 | start_psymtab (struct objfile *objfile, const char *filename, CORE_ADDR textlow, | |
1914 | int ldsymoff) | |
1915 | { | |
1916 | struct partial_symtab *result = | |
1917 | start_psymtab_common (objfile, filename, textlow); | |
1918 | ||
1919 | result->read_symtab_private = | |
1920 | XOBNEW (&objfile->objfile_obstack, struct symloc); | |
1921 | LDSYMOFF (result) = ldsymoff; | |
1922 | result->read_symtab = dbx_read_symtab; | |
1923 | SYMBOL_SIZE (result) = symbol_size; | |
1924 | SYMBOL_OFFSET (result) = symbol_table_offset; | |
1925 | STRING_OFFSET (result) = string_table_offset; | |
1926 | FILE_STRING_OFFSET (result) = file_string_table_offset; | |
1927 | ||
1928 | /* Deduce the source language from the filename for this psymtab. */ | |
1929 | psymtab_language = deduce_language_from_filename (filename); | |
1930 | PST_LANGUAGE (result) = psymtab_language; | |
1931 | ||
1932 | return result; | |
1933 | } | |
1934 | ||
1935 | /* Close off the current usage of PST. | |
1936 | Returns PST or NULL if the partial symtab was empty and thrown away. | |
1937 | ||
1938 | FIXME: List variables and peculiarities of same. */ | |
1939 | ||
1940 | struct partial_symtab * | |
1941 | dbx_end_psymtab (struct objfile *objfile, struct partial_symtab *pst, | |
1942 | const char **include_list, int num_includes, | |
1943 | int capping_symbol_offset, CORE_ADDR capping_text, | |
1944 | struct partial_symtab **dependency_list, | |
1945 | int number_dependencies, | |
1946 | int textlow_not_set) | |
1947 | { | |
1948 | int i; | |
1949 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
1950 | ||
1951 | if (capping_symbol_offset != -1) | |
1952 | LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst); | |
1953 | pst->set_text_high (capping_text); | |
1954 | ||
1955 | /* Under Solaris, the N_SO symbols always have a value of 0, | |
1956 | instead of the usual address of the .o file. Therefore, | |
1957 | we have to do some tricks to fill in texthigh and textlow. | |
1958 | The first trick is: if we see a static | |
1959 | or global function, and the textlow for the current pst | |
1960 | is not set (ie: textlow_not_set), then we use that function's | |
1961 | address for the textlow of the pst. */ | |
1962 | ||
1963 | /* Now, to fill in texthigh, we remember the last function seen | |
1964 | in the .o file. Also, there's a hack in | |
1965 | bfd/elf.c and gdb/elfread.c to pass the ELF st_size field | |
1966 | to here via the misc_info field. Therefore, we can fill in | |
1967 | a reliable texthigh by taking the address plus size of the | |
1968 | last function in the file. */ | |
1969 | ||
1970 | if (!pst->text_high_valid && last_function_name | |
1971 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
1972 | { | |
1973 | int n; | |
1974 | struct bound_minimal_symbol minsym; | |
1975 | ||
1976 | const char *colon = strchr (last_function_name, ':'); | |
1977 | if (colon == NULL) | |
1978 | n = 0; | |
1979 | else | |
1980 | n = colon - last_function_name; | |
1981 | char *p = (char *) alloca (n + 2); | |
1982 | strncpy (p, last_function_name, n); | |
1983 | p[n] = 0; | |
1984 | ||
1985 | minsym = lookup_minimal_symbol (p, pst->filename, objfile); | |
1986 | if (minsym.minsym == NULL) | |
1987 | { | |
1988 | /* Sun Fortran appends an underscore to the minimal symbol name, | |
1989 | try again with an appended underscore if the minimal symbol | |
1990 | was not found. */ | |
1991 | p[n] = '_'; | |
1992 | p[n + 1] = 0; | |
1993 | minsym = lookup_minimal_symbol (p, pst->filename, objfile); | |
1994 | } | |
1995 | ||
1996 | if (minsym.minsym) | |
1997 | pst->set_text_high (MSYMBOL_VALUE_RAW_ADDRESS (minsym.minsym) | |
1998 | + MSYMBOL_SIZE (minsym.minsym)); | |
1999 | ||
2000 | last_function_name = NULL; | |
2001 | } | |
2002 | ||
2003 | if (!gdbarch_sofun_address_maybe_missing (gdbarch)) | |
2004 | ; | |
2005 | /* This test will be true if the last .o file is only data. */ | |
2006 | else if (textlow_not_set) | |
2007 | pst->set_text_low (pst->raw_text_high ()); | |
2008 | else | |
2009 | { | |
2010 | /* If we know our own starting text address, then walk through all other | |
2011 | psymtabs for this objfile, and if any didn't know their ending text | |
2012 | address, set it to our starting address. Take care to not set our | |
2013 | own ending address to our starting address. */ | |
2014 | ||
2015 | for (partial_symtab *p1 : objfile->psymtabs ()) | |
2016 | if (!p1->text_high_valid && p1->text_low_valid && p1 != pst) | |
2017 | p1->set_text_high (pst->raw_text_low ()); | |
2018 | } | |
2019 | ||
2020 | /* End of kludge for patching Solaris textlow and texthigh. */ | |
2021 | ||
2022 | end_psymtab_common (objfile, pst); | |
2023 | ||
2024 | pst->number_of_dependencies = number_dependencies; | |
2025 | if (number_dependencies) | |
2026 | { | |
2027 | pst->dependencies | |
2028 | = objfile->partial_symtabs->allocate_dependencies (number_dependencies); | |
2029 | memcpy (pst->dependencies, dependency_list, | |
2030 | number_dependencies * sizeof (struct partial_symtab *)); | |
2031 | } | |
2032 | else | |
2033 | pst->dependencies = 0; | |
2034 | ||
2035 | for (i = 0; i < num_includes; i++) | |
2036 | { | |
2037 | struct partial_symtab *subpst = | |
2038 | allocate_psymtab (include_list[i], objfile); | |
2039 | ||
2040 | subpst->read_symtab_private = | |
2041 | XOBNEW (&objfile->objfile_obstack, struct symloc); | |
2042 | LDSYMOFF (subpst) = | |
2043 | LDSYMLEN (subpst) = 0; | |
2044 | ||
2045 | /* We could save slight bits of space by only making one of these, | |
2046 | shared by the entire set of include files. FIXME-someday. */ | |
2047 | subpst->dependencies = | |
2048 | objfile->partial_symtabs->allocate_dependencies (1); | |
2049 | subpst->dependencies[0] = pst; | |
2050 | subpst->number_of_dependencies = 1; | |
2051 | ||
2052 | subpst->read_symtab = pst->read_symtab; | |
2053 | } | |
2054 | ||
2055 | if (num_includes == 0 | |
2056 | && number_dependencies == 0 | |
2057 | && pst->n_global_syms == 0 | |
2058 | && pst->n_static_syms == 0 | |
2059 | && has_line_numbers == 0) | |
2060 | { | |
2061 | /* Throw away this psymtab, it's empty. We can't deallocate it, since | |
2062 | it is on the obstack, but we can forget to chain it on the list. */ | |
2063 | /* Empty psymtabs happen as a result of header files which don't have | |
2064 | any symbols in them. There can be a lot of them. But this check | |
2065 | is wrong, in that a psymtab with N_SLINE entries but nothing else | |
2066 | is not empty, but we don't realize that. Fixing that without slowing | |
2067 | things down might be tricky. */ | |
2068 | ||
2069 | discard_psymtab (objfile, pst); | |
2070 | ||
2071 | /* Indicate that psymtab was thrown away. */ | |
2072 | pst = NULL; | |
2073 | } | |
2074 | return pst; | |
2075 | } | |
2076 | \f | |
2077 | static void | |
2078 | dbx_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst) | |
2079 | { | |
2080 | int i; | |
2081 | ||
2082 | if (pst->readin) | |
2083 | { | |
2084 | fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. " | |
2085 | "Shouldn't happen.\n", | |
2086 | pst->filename); | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | /* Read in all partial symtabs on which this one is dependent. */ | |
2091 | for (i = 0; i < pst->number_of_dependencies; i++) | |
2092 | if (!pst->dependencies[i]->readin) | |
2093 | { | |
2094 | /* Inform about additional files that need to be read in. */ | |
2095 | if (info_verbose) | |
2096 | { | |
2097 | fputs_filtered (" ", gdb_stdout); | |
2098 | wrap_here (""); | |
2099 | fputs_filtered ("and ", gdb_stdout); | |
2100 | wrap_here (""); | |
2101 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
2102 | wrap_here (""); /* Flush output. */ | |
2103 | gdb_flush (gdb_stdout); | |
2104 | } | |
2105 | dbx_psymtab_to_symtab_1 (objfile, pst->dependencies[i]); | |
2106 | } | |
2107 | ||
2108 | if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */ | |
2109 | { | |
2110 | /* Init stuff necessary for reading in symbols */ | |
2111 | stabsread_init (); | |
2112 | scoped_free_pendings free_pending; | |
2113 | file_string_table_offset = FILE_STRING_OFFSET (pst); | |
2114 | symbol_size = SYMBOL_SIZE (pst); | |
2115 | ||
2116 | /* Read in this file's symbols. */ | |
2117 | bfd_seek (objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET); | |
2118 | read_ofile_symtab (objfile, pst); | |
2119 | } | |
2120 | ||
2121 | pst->readin = 1; | |
2122 | } | |
2123 | ||
2124 | /* Read in all of the symbols for a given psymtab for real. | |
2125 | Be verbose about it if the user wants that. SELF is not NULL. */ | |
2126 | ||
2127 | static void | |
2128 | dbx_read_symtab (struct partial_symtab *self, struct objfile *objfile) | |
2129 | { | |
2130 | if (self->readin) | |
2131 | { | |
2132 | fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. " | |
2133 | "Shouldn't happen.\n", | |
2134 | self->filename); | |
2135 | return; | |
2136 | } | |
2137 | ||
2138 | if (LDSYMLEN (self) || self->number_of_dependencies) | |
2139 | { | |
2140 | /* Print the message now, before reading the string table, | |
2141 | to avoid disconcerting pauses. */ | |
2142 | if (info_verbose) | |
2143 | { | |
2144 | printf_filtered ("Reading in symbols for %s...", self->filename); | |
2145 | gdb_flush (gdb_stdout); | |
2146 | } | |
2147 | ||
2148 | next_symbol_text_func = dbx_next_symbol_text; | |
2149 | ||
2150 | { | |
2151 | scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data); | |
2152 | gdb::unique_xmalloc_ptr<gdb_byte> data_holder; | |
2153 | if (DBX_STAB_SECTION (objfile)) | |
2154 | { | |
2155 | stabs_data | |
2156 | = symfile_relocate_debug_section (objfile, | |
2157 | DBX_STAB_SECTION (objfile), | |
2158 | NULL); | |
2159 | data_holder.reset (stabs_data); | |
2160 | } | |
2161 | ||
2162 | dbx_psymtab_to_symtab_1 (objfile, self); | |
2163 | } | |
2164 | ||
2165 | /* Match with global symbols. This only needs to be done once, | |
2166 | after all of the symtabs and dependencies have been read in. */ | |
2167 | scan_file_globals (objfile); | |
2168 | ||
2169 | /* Finish up the debug error message. */ | |
2170 | if (info_verbose) | |
2171 | printf_filtered ("done.\n"); | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | /* Read in a defined section of a specific object file's symbols. */ | |
2176 | ||
2177 | static void | |
2178 | read_ofile_symtab (struct objfile *objfile, struct partial_symtab *pst) | |
2179 | { | |
2180 | const char *namestring; | |
2181 | struct external_nlist *bufp; | |
2182 | struct internal_nlist nlist; | |
2183 | unsigned char type; | |
2184 | unsigned max_symnum; | |
2185 | bfd *abfd; | |
2186 | int sym_offset; /* Offset to start of symbols to read */ | |
2187 | int sym_size; /* Size of symbols to read */ | |
2188 | CORE_ADDR text_offset; /* Start of text segment for symbols */ | |
2189 | int text_size; /* Size of text segment for symbols */ | |
2190 | struct section_offsets *section_offsets; | |
2191 | ||
2192 | sym_offset = LDSYMOFF (pst); | |
2193 | sym_size = LDSYMLEN (pst); | |
2194 | text_offset = pst->text_low (objfile); | |
2195 | text_size = pst->text_high (objfile) - pst->text_low (objfile); | |
2196 | section_offsets = objfile->section_offsets; | |
2197 | ||
2198 | dbxread_objfile = objfile; | |
2199 | ||
2200 | stringtab_global = DBX_STRINGTAB (objfile); | |
2201 | set_last_source_file (NULL); | |
2202 | ||
2203 | abfd = objfile->obfd; | |
2204 | symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol. */ | |
2205 | symbuf_end = symbuf_idx = 0; | |
2206 | symbuf_read = 0; | |
2207 | symbuf_left = sym_offset + sym_size; | |
2208 | ||
2209 | /* It is necessary to actually read one symbol *before* the start | |
2210 | of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL | |
2211 | occurs before the N_SO symbol. | |
2212 | ||
2213 | Detecting this in read_dbx_symtab | |
2214 | would slow down initial readin, so we look for it here instead. */ | |
2215 | if (!processing_acc_compilation && sym_offset >= (int) symbol_size) | |
2216 | { | |
2217 | stabs_seek (sym_offset - symbol_size); | |
2218 | fill_symbuf (abfd); | |
2219 | bufp = &symbuf[symbuf_idx++]; | |
2220 | INTERNALIZE_SYMBOL (nlist, bufp, abfd); | |
2221 | OBJSTAT (objfile, n_stabs++); | |
2222 | ||
2223 | namestring = set_namestring (objfile, &nlist); | |
2224 | ||
2225 | processing_gcc_compilation = 0; | |
2226 | if (nlist.n_type == N_TEXT) | |
2227 | { | |
2228 | const char *tempstring = namestring; | |
2229 | ||
2230 | if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0) | |
2231 | processing_gcc_compilation = 1; | |
2232 | else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0) | |
2233 | processing_gcc_compilation = 2; | |
2234 | if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd)) | |
2235 | ++tempstring; | |
2236 | if (startswith (tempstring, "__gnu_compiled")) | |
2237 | processing_gcc_compilation = 2; | |
2238 | } | |
2239 | } | |
2240 | else | |
2241 | { | |
2242 | /* The N_SO starting this symtab is the first symbol, so we | |
2243 | better not check the symbol before it. I'm not this can | |
2244 | happen, but it doesn't hurt to check for it. */ | |
2245 | stabs_seek (sym_offset); | |
2246 | processing_gcc_compilation = 0; | |
2247 | } | |
2248 | ||
2249 | if (symbuf_idx == symbuf_end) | |
2250 | fill_symbuf (abfd); | |
2251 | bufp = &symbuf[symbuf_idx]; | |
2252 | if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO) | |
2253 | error (_("First symbol in segment of executable not a source symbol")); | |
2254 | ||
2255 | max_symnum = sym_size / symbol_size; | |
2256 | ||
2257 | for (symnum = 0; | |
2258 | symnum < max_symnum; | |
2259 | symnum++) | |
2260 | { | |
2261 | QUIT; /* Allow this to be interruptable. */ | |
2262 | if (symbuf_idx == symbuf_end) | |
2263 | fill_symbuf (abfd); | |
2264 | bufp = &symbuf[symbuf_idx++]; | |
2265 | INTERNALIZE_SYMBOL (nlist, bufp, abfd); | |
2266 | OBJSTAT (objfile, n_stabs++); | |
2267 | ||
2268 | type = bfd_h_get_8 (abfd, bufp->e_type); | |
2269 | ||
2270 | namestring = set_namestring (objfile, &nlist); | |
2271 | ||
2272 | if (type & N_STAB) | |
2273 | { | |
2274 | if (sizeof (nlist.n_value) > 4 | |
2275 | /* We are a 64-bit debugger debugging a 32-bit program. */ | |
2276 | && (type == N_LSYM || type == N_PSYM)) | |
2277 | /* We have to be careful with the n_value in the case of N_LSYM | |
2278 | and N_PSYM entries, because they are signed offsets from frame | |
2279 | pointer, but we actually read them as unsigned 32-bit values. | |
2280 | This is not a problem for 32-bit debuggers, for which negative | |
2281 | values end up being interpreted correctly (as negative | |
2282 | offsets) due to integer overflow. | |
2283 | But we need to sign-extend the value for 64-bit debuggers, | |
2284 | or we'll end up interpreting negative values as very large | |
2285 | positive offsets. */ | |
2286 | nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000; | |
2287 | process_one_symbol (type, nlist.n_desc, nlist.n_value, | |
2288 | namestring, section_offsets, objfile, | |
2289 | PST_LANGUAGE (pst)); | |
2290 | } | |
2291 | /* We skip checking for a new .o or -l file; that should never | |
2292 | happen in this routine. */ | |
2293 | else if (type == N_TEXT) | |
2294 | { | |
2295 | /* I don't think this code will ever be executed, because | |
2296 | the GCC_COMPILED_FLAG_SYMBOL usually is right before | |
2297 | the N_SO symbol which starts this source file. | |
2298 | However, there is no reason not to accept | |
2299 | the GCC_COMPILED_FLAG_SYMBOL anywhere. */ | |
2300 | ||
2301 | if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0) | |
2302 | processing_gcc_compilation = 1; | |
2303 | else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0) | |
2304 | processing_gcc_compilation = 2; | |
2305 | } | |
2306 | else if (type & N_EXT || type == (unsigned char) N_TEXT | |
2307 | || type == (unsigned char) N_NBTEXT) | |
2308 | { | |
2309 | /* Global symbol: see if we came across a dbx defintion for | |
2310 | a corresponding symbol. If so, store the value. Remove | |
2311 | syms from the chain when their values are stored, but | |
2312 | search the whole chain, as there may be several syms from | |
2313 | different files with the same name. */ | |
2314 | /* This is probably not true. Since the files will be read | |
2315 | in one at a time, each reference to a global symbol will | |
2316 | be satisfied in each file as it appears. So we skip this | |
2317 | section. */ | |
2318 | ; | |
2319 | } | |
2320 | } | |
2321 | ||
2322 | /* In a Solaris elf file, this variable, which comes from the value | |
2323 | of the N_SO symbol, will still be 0. Luckily, text_offset, which | |
2324 | comes from low text address of PST, is correct. */ | |
2325 | if (get_last_source_start_addr () == 0) | |
2326 | set_last_source_start_addr (text_offset); | |
2327 | ||
2328 | /* In reordered executables last_source_start_addr may not be the | |
2329 | lower bound for this symtab, instead use text_offset which comes | |
2330 | from the low text address of PST, which is correct. */ | |
2331 | if (get_last_source_start_addr () > text_offset) | |
2332 | set_last_source_start_addr (text_offset); | |
2333 | ||
2334 | pst->compunit_symtab = end_symtab (text_offset + text_size, | |
2335 | SECT_OFF_TEXT (objfile)); | |
2336 | ||
2337 | end_stabs (); | |
2338 | ||
2339 | dbxread_objfile = NULL; | |
2340 | } | |
2341 | \f | |
2342 | ||
2343 | /* Record the namespace that the function defined by SYMBOL was | |
2344 | defined in, if necessary. BLOCK is the associated block; use | |
2345 | OBSTACK for allocation. */ | |
2346 | ||
2347 | static void | |
2348 | cp_set_block_scope (const struct symbol *symbol, | |
2349 | struct block *block, | |
2350 | struct obstack *obstack) | |
2351 | { | |
2352 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) | |
2353 | { | |
2354 | /* Try to figure out the appropriate namespace from the | |
2355 | demangled name. */ | |
2356 | ||
2357 | /* FIXME: carlton/2003-04-15: If the function in question is | |
2358 | a method of a class, the name will actually include the | |
2359 | name of the class as well. This should be harmless, but | |
2360 | is a little unfortunate. */ | |
2361 | ||
2362 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); | |
2363 | unsigned int prefix_len = cp_entire_prefix_len (name); | |
2364 | ||
2365 | block_set_scope (block, | |
2366 | (const char *) obstack_copy0 (obstack, name, prefix_len), | |
2367 | obstack); | |
2368 | } | |
2369 | } | |
2370 | ||
2371 | /* This handles a single symbol from the symbol-file, building symbols | |
2372 | into a GDB symtab. It takes these arguments and an implicit argument. | |
2373 | ||
2374 | TYPE is the type field of the ".stab" symbol entry. | |
2375 | DESC is the desc field of the ".stab" entry. | |
2376 | VALU is the value field of the ".stab" entry. | |
2377 | NAME is the symbol name, in our address space. | |
2378 | SECTION_OFFSETS is a set of amounts by which the sections of this | |
2379 | object file were relocated when it was loaded into memory. Note | |
2380 | that these section_offsets are not the objfile->section_offsets but | |
2381 | the pst->section_offsets. All symbols that refer to memory | |
2382 | locations need to be offset by these amounts. | |
2383 | OBJFILE is the object file from which we are reading symbols. It | |
2384 | is used in end_symtab. | |
2385 | LANGUAGE is the language of the symtab. | |
2386 | */ | |
2387 | ||
2388 | void | |
2389 | process_one_symbol (int type, int desc, CORE_ADDR valu, const char *name, | |
2390 | const struct section_offsets *section_offsets, | |
2391 | struct objfile *objfile, enum language language) | |
2392 | { | |
2393 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
2394 | struct context_stack *newobj; | |
2395 | struct context_stack cstk; | |
2396 | /* This remembers the address of the start of a function. It is | |
2397 | used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries | |
2398 | are relative to the current function's start address. On systems | |
2399 | other than Solaris 2, this just holds the SECT_OFF_TEXT value, | |
2400 | and is used to relocate these symbol types rather than | |
2401 | SECTION_OFFSETS. */ | |
2402 | static CORE_ADDR function_start_offset; | |
2403 | ||
2404 | /* This holds the address of the start of a function, without the | |
2405 | system peculiarities of function_start_offset. */ | |
2406 | static CORE_ADDR last_function_start; | |
2407 | ||
2408 | /* If this is nonzero, we've seen an N_SLINE since the start of the | |
2409 | current function. We use this to tell us to move the first sline | |
2410 | to the beginning of the function regardless of what its given | |
2411 | value is. */ | |
2412 | static int sline_found_in_function = 1; | |
2413 | ||
2414 | /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this | |
2415 | source file. Used to detect the SunPRO solaris compiler. */ | |
2416 | static int n_opt_found; | |
2417 | ||
2418 | /* Something is wrong if we see real data before seeing a source | |
2419 | file name. */ | |
2420 | ||
2421 | if (get_last_source_file () == NULL && type != (unsigned char) N_SO) | |
2422 | { | |
2423 | /* Ignore any symbols which appear before an N_SO symbol. | |
2424 | Currently no one puts symbols there, but we should deal | |
2425 | gracefully with the case. A complain()t might be in order, | |
2426 | but this should not be an error (). */ | |
2427 | return; | |
2428 | } | |
2429 | ||
2430 | switch (type) | |
2431 | { | |
2432 | case N_FUN: | |
2433 | case N_FNAME: | |
2434 | ||
2435 | if (*name == '\000') | |
2436 | { | |
2437 | /* This N_FUN marks the end of a function. This closes off | |
2438 | the current block. */ | |
2439 | struct block *block; | |
2440 | ||
2441 | if (outermost_context_p ()) | |
2442 | { | |
2443 | lbrac_mismatch_complaint (symnum); | |
2444 | break; | |
2445 | } | |
2446 | ||
2447 | /* The following check is added before recording line 0 at | |
2448 | end of function so as to handle hand-generated stabs | |
2449 | which may have an N_FUN stabs at the end of the function, | |
2450 | but no N_SLINE stabs. */ | |
2451 | if (sline_found_in_function) | |
2452 | { | |
2453 | CORE_ADDR addr = last_function_start + valu; | |
2454 | ||
2455 | record_line (get_current_subfile (), 0, | |
2456 | gdbarch_addr_bits_remove (gdbarch, addr)); | |
2457 | } | |
2458 | ||
2459 | within_function = 0; | |
2460 | cstk = pop_context (); | |
2461 | ||
2462 | /* Make a block for the local symbols within. */ | |
2463 | block = finish_block (cstk.name, | |
2464 | cstk.old_blocks, NULL, | |
2465 | cstk.start_addr, cstk.start_addr + valu); | |
2466 | ||
2467 | /* For C++, set the block's scope. */ | |
2468 | if (SYMBOL_LANGUAGE (cstk.name) == language_cplus) | |
2469 | cp_set_block_scope (cstk.name, block, &objfile->objfile_obstack); | |
2470 | ||
2471 | /* May be switching to an assembler file which may not be using | |
2472 | block relative stabs, so reset the offset. */ | |
2473 | function_start_offset = 0; | |
2474 | ||
2475 | break; | |
2476 | } | |
2477 | ||
2478 | sline_found_in_function = 0; | |
2479 | ||
2480 | /* Relocate for dynamic loading. */ | |
2481 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2482 | valu = gdbarch_addr_bits_remove (gdbarch, valu); | |
2483 | last_function_start = valu; | |
2484 | ||
2485 | goto define_a_symbol; | |
2486 | ||
2487 | case N_LBRAC: | |
2488 | /* This "symbol" just indicates the start of an inner lexical | |
2489 | context within a function. */ | |
2490 | ||
2491 | /* Ignore extra outermost context from SunPRO cc and acc. */ | |
2492 | if (n_opt_found && desc == 1) | |
2493 | break; | |
2494 | ||
2495 | valu += function_start_offset; | |
2496 | ||
2497 | push_context (desc, valu); | |
2498 | break; | |
2499 | ||
2500 | case N_RBRAC: | |
2501 | /* This "symbol" just indicates the end of an inner lexical | |
2502 | context that was started with N_LBRAC. */ | |
2503 | ||
2504 | /* Ignore extra outermost context from SunPRO cc and acc. */ | |
2505 | if (n_opt_found && desc == 1) | |
2506 | break; | |
2507 | ||
2508 | valu += function_start_offset; | |
2509 | ||
2510 | if (outermost_context_p ()) | |
2511 | { | |
2512 | lbrac_mismatch_complaint (symnum); | |
2513 | break; | |
2514 | } | |
2515 | ||
2516 | cstk = pop_context (); | |
2517 | if (desc != cstk.depth) | |
2518 | lbrac_mismatch_complaint (symnum); | |
2519 | ||
2520 | if (*get_local_symbols () != NULL) | |
2521 | { | |
2522 | /* GCC development snapshots from March to December of | |
2523 | 2000 would output N_LSYM entries after N_LBRAC | |
2524 | entries. As a consequence, these symbols are simply | |
2525 | discarded. Complain if this is the case. */ | |
2526 | complaint (_("misplaced N_LBRAC entry; discarding local " | |
2527 | "symbols which have no enclosing block")); | |
2528 | } | |
2529 | *get_local_symbols () = cstk.locals; | |
2530 | ||
2531 | if (get_context_stack_depth () > 1) | |
2532 | { | |
2533 | /* This is not the outermost LBRAC...RBRAC pair in the | |
2534 | function, its local symbols preceded it, and are the ones | |
2535 | just recovered from the context stack. Define the block | |
2536 | for them (but don't bother if the block contains no | |
2537 | symbols. Should we complain on blocks without symbols? | |
2538 | I can't think of any useful purpose for them). */ | |
2539 | if (*get_local_symbols () != NULL) | |
2540 | { | |
2541 | /* Muzzle a compiler bug that makes end < start. | |
2542 | ||
2543 | ??? Which compilers? Is this ever harmful?. */ | |
2544 | if (cstk.start_addr > valu) | |
2545 | { | |
2546 | complaint (_("block start larger than block end")); | |
2547 | cstk.start_addr = valu; | |
2548 | } | |
2549 | /* Make a block for the local symbols within. */ | |
2550 | finish_block (0, cstk.old_blocks, NULL, | |
2551 | cstk.start_addr, valu); | |
2552 | } | |
2553 | } | |
2554 | else | |
2555 | { | |
2556 | /* This is the outermost LBRAC...RBRAC pair. There is no | |
2557 | need to do anything; leave the symbols that preceded it | |
2558 | to be attached to the function's own block. We need to | |
2559 | indicate that we just moved outside of the function. */ | |
2560 | within_function = 0; | |
2561 | } | |
2562 | ||
2563 | break; | |
2564 | ||
2565 | case N_FN: | |
2566 | case N_FN_SEQ: | |
2567 | /* This kind of symbol indicates the start of an object file. | |
2568 | Relocate for dynamic loading. */ | |
2569 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2570 | break; | |
2571 | ||
2572 | case N_SO: | |
2573 | /* This type of symbol indicates the start of data for one | |
2574 | source file. Finish the symbol table of the previous source | |
2575 | file (if any) and start accumulating a new symbol table. | |
2576 | Relocate for dynamic loading. */ | |
2577 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2578 | ||
2579 | n_opt_found = 0; | |
2580 | ||
2581 | if (get_last_source_file ()) | |
2582 | { | |
2583 | /* Check if previous symbol was also an N_SO (with some | |
2584 | sanity checks). If so, that one was actually the | |
2585 | directory name, and the current one is the real file | |
2586 | name. Patch things up. */ | |
2587 | if (previous_stab_code == (unsigned char) N_SO) | |
2588 | { | |
2589 | patch_subfile_names (get_current_subfile (), name); | |
2590 | break; /* Ignore repeated SOs. */ | |
2591 | } | |
2592 | end_symtab (valu, SECT_OFF_TEXT (objfile)); | |
2593 | end_stabs (); | |
2594 | } | |
2595 | ||
2596 | /* Null name means this just marks the end of text for this .o | |
2597 | file. Don't start a new symtab in this case. */ | |
2598 | if (*name == '\000') | |
2599 | break; | |
2600 | ||
2601 | function_start_offset = 0; | |
2602 | ||
2603 | start_stabs (); | |
2604 | start_symtab (objfile, name, NULL, valu, language); | |
2605 | record_debugformat ("stabs"); | |
2606 | break; | |
2607 | ||
2608 | case N_SOL: | |
2609 | /* This type of symbol indicates the start of data for a | |
2610 | sub-source-file, one whose contents were copied or included | |
2611 | in the compilation of the main source file (whose name was | |
2612 | given in the N_SO symbol). Relocate for dynamic loading. */ | |
2613 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2614 | start_subfile (name); | |
2615 | break; | |
2616 | ||
2617 | case N_BINCL: | |
2618 | push_subfile (); | |
2619 | add_new_header_file (name, valu); | |
2620 | start_subfile (name); | |
2621 | break; | |
2622 | ||
2623 | case N_EINCL: | |
2624 | start_subfile (pop_subfile ()); | |
2625 | break; | |
2626 | ||
2627 | case N_EXCL: | |
2628 | add_old_header_file (name, valu); | |
2629 | break; | |
2630 | ||
2631 | case N_SLINE: | |
2632 | /* This type of "symbol" really just records one line-number -- | |
2633 | core-address correspondence. Enter it in the line list for | |
2634 | this symbol table. */ | |
2635 | ||
2636 | /* Relocate for dynamic loading and for ELF acc | |
2637 | function-relative symbols. */ | |
2638 | valu += function_start_offset; | |
2639 | ||
2640 | /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the | |
2641 | middle of the prologue instead of right at the start of the | |
2642 | function. To deal with this we record the address for the | |
2643 | first N_SLINE stab to be the start of the function instead of | |
2644 | the listed location. We really shouldn't to this. When | |
2645 | compiling with optimization, this first N_SLINE stab might be | |
2646 | optimized away. Other (non-GCC) compilers don't emit this | |
2647 | stab at all. There is no real harm in having an extra | |
2648 | numbered line, although it can be a bit annoying for the | |
2649 | user. However, it totally screws up our testsuite. | |
2650 | ||
2651 | So for now, keep adjusting the address of the first N_SLINE | |
2652 | stab, but only for code compiled with GCC. */ | |
2653 | ||
2654 | if (within_function && sline_found_in_function == 0) | |
2655 | { | |
2656 | CORE_ADDR addr = processing_gcc_compilation == 2 ? | |
2657 | last_function_start : valu; | |
2658 | ||
2659 | record_line (get_current_subfile (), desc, | |
2660 | gdbarch_addr_bits_remove (gdbarch, addr)); | |
2661 | sline_found_in_function = 1; | |
2662 | } | |
2663 | else | |
2664 | record_line (get_current_subfile (), desc, | |
2665 | gdbarch_addr_bits_remove (gdbarch, valu)); | |
2666 | break; | |
2667 | ||
2668 | case N_BCOMM: | |
2669 | common_block_start (name, objfile); | |
2670 | break; | |
2671 | ||
2672 | case N_ECOMM: | |
2673 | common_block_end (objfile); | |
2674 | break; | |
2675 | ||
2676 | /* The following symbol types need to have the appropriate | |
2677 | offset added to their value; then we process symbol | |
2678 | definitions in the name. */ | |
2679 | ||
2680 | case N_STSYM: /* Static symbol in data segment. */ | |
2681 | case N_LCSYM: /* Static symbol in BSS segment. */ | |
2682 | case N_ROSYM: /* Static symbol in read-only data segment. */ | |
2683 | /* HORRID HACK DEPT. However, it's Sun's furgin' fault. | |
2684 | Solaris 2's stabs-in-elf makes *most* symbols relative but | |
2685 | leaves a few absolute (at least for Solaris 2.1 and version | |
2686 | 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on | |
2687 | the fence. .stab "foo:S...",N_STSYM is absolute (ld | |
2688 | relocates it) .stab "foo:V...",N_STSYM is relative (section | |
2689 | base subtracted). This leaves us no choice but to search for | |
2690 | the 'S' or 'V'... (or pass the whole section_offsets stuff | |
2691 | down ONE MORE function call level, which we really don't want | |
2692 | to do). */ | |
2693 | { | |
2694 | const char *p; | |
2695 | ||
2696 | /* Normal object file and NLMs have non-zero text seg offsets, | |
2697 | but don't need their static syms offset in this fashion. | |
2698 | XXX - This is really a crock that should be fixed in the | |
2699 | solib handling code so that I don't have to work around it | |
2700 | here. */ | |
2701 | ||
2702 | if (!symfile_relocatable) | |
2703 | { | |
2704 | p = strchr (name, ':'); | |
2705 | if (p != 0 && p[1] == 'S') | |
2706 | { | |
2707 | /* The linker relocated it. We don't want to add a | |
2708 | Sun-stabs Tfoo.foo-like offset, but we *do* | |
2709 | want to add whatever solib.c passed to | |
2710 | symbol_file_add as addr (this is known to affect | |
2711 | SunOS 4, and I suspect ELF too). Since there is no | |
2712 | Ttext.text symbol, we can get addr from the text offset. */ | |
2713 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2714 | goto define_a_symbol; | |
2715 | } | |
2716 | } | |
2717 | /* Since it's not the kludge case, re-dispatch to the right | |
2718 | handler. */ | |
2719 | switch (type) | |
2720 | { | |
2721 | case N_STSYM: | |
2722 | goto case_N_STSYM; | |
2723 | case N_LCSYM: | |
2724 | goto case_N_LCSYM; | |
2725 | case N_ROSYM: | |
2726 | goto case_N_ROSYM; | |
2727 | default: | |
2728 | internal_error (__FILE__, __LINE__, | |
2729 | _("failed internal consistency check")); | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | case_N_STSYM: /* Static symbol in data segment. */ | |
2734 | case N_DSLINE: /* Source line number, data segment. */ | |
2735 | valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile)); | |
2736 | goto define_a_symbol; | |
2737 | ||
2738 | case_N_LCSYM: /* Static symbol in BSS segment. */ | |
2739 | case N_BSLINE: /* Source line number, BSS segment. */ | |
2740 | /* N_BROWS: overlaps with N_BSLINE. */ | |
2741 | valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile)); | |
2742 | goto define_a_symbol; | |
2743 | ||
2744 | case_N_ROSYM: /* Static symbol in read-only data segment. */ | |
2745 | valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile)); | |
2746 | goto define_a_symbol; | |
2747 | ||
2748 | case N_ENTRY: /* Alternate entry point. */ | |
2749 | /* Relocate for dynamic loading. */ | |
2750 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)); | |
2751 | goto define_a_symbol; | |
2752 | ||
2753 | /* The following symbol types we don't know how to process. | |
2754 | Handle them in a "default" way, but complain to people who | |
2755 | care. */ | |
2756 | default: | |
2757 | case N_CATCH: /* Exception handler catcher. */ | |
2758 | case N_EHDECL: /* Exception handler name. */ | |
2759 | case N_PC: /* Global symbol in Pascal. */ | |
2760 | case N_M2C: /* Modula-2 compilation unit. */ | |
2761 | /* N_MOD2: overlaps with N_EHDECL. */ | |
2762 | case N_SCOPE: /* Modula-2 scope information. */ | |
2763 | case N_ECOML: /* End common (local name). */ | |
2764 | case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ | |
2765 | case N_NBDATA: | |
2766 | case N_NBBSS: | |
2767 | case N_NBSTS: | |
2768 | case N_NBLCS: | |
2769 | unknown_symtype_complaint (hex_string (type)); | |
2770 | /* FALLTHROUGH */ | |
2771 | ||
2772 | define_a_symbol: | |
2773 | /* These symbol types don't need the address field relocated, | |
2774 | since it is either unused, or is absolute. */ | |
2775 | case N_GSYM: /* Global variable. */ | |
2776 | case N_NSYMS: /* Number of symbols (Ultrix). */ | |
2777 | case N_NOMAP: /* No map? (Ultrix). */ | |
2778 | case N_RSYM: /* Register variable. */ | |
2779 | case N_DEFD: /* Modula-2 GNU module dependency. */ | |
2780 | case N_SSYM: /* Struct or union element. */ | |
2781 | case N_LSYM: /* Local symbol in stack. */ | |
2782 | case N_PSYM: /* Parameter variable. */ | |
2783 | case N_LENG: /* Length of preceding symbol type. */ | |
2784 | if (name) | |
2785 | { | |
2786 | int deftype; | |
2787 | const char *colon_pos = strchr (name, ':'); | |
2788 | ||
2789 | if (colon_pos == NULL) | |
2790 | deftype = '\0'; | |
2791 | else | |
2792 | deftype = colon_pos[1]; | |
2793 | ||
2794 | switch (deftype) | |
2795 | { | |
2796 | case 'f': | |
2797 | case 'F': | |
2798 | /* Deal with the SunPRO 3.0 compiler which omits the | |
2799 | address from N_FUN symbols. */ | |
2800 | if (type == N_FUN | |
2801 | && valu == ANOFFSET (section_offsets, | |
2802 | SECT_OFF_TEXT (objfile)) | |
2803 | && gdbarch_sofun_address_maybe_missing (gdbarch)) | |
2804 | { | |
2805 | struct bound_minimal_symbol minsym | |
2806 | = find_stab_function (name, get_last_source_file (), | |
2807 | objfile); | |
2808 | if (minsym.minsym != NULL) | |
2809 | valu = BMSYMBOL_VALUE_ADDRESS (minsym); | |
2810 | } | |
2811 | ||
2812 | /* These addresses are absolute. */ | |
2813 | function_start_offset = valu; | |
2814 | ||
2815 | within_function = 1; | |
2816 | ||
2817 | if (get_context_stack_depth () > 1) | |
2818 | { | |
2819 | complaint (_("unmatched N_LBRAC before symtab pos %d"), | |
2820 | symnum); | |
2821 | break; | |
2822 | } | |
2823 | ||
2824 | if (!outermost_context_p ()) | |
2825 | { | |
2826 | struct block *block; | |
2827 | ||
2828 | cstk = pop_context (); | |
2829 | /* Make a block for the local symbols within. */ | |
2830 | block = finish_block (cstk.name, | |
2831 | cstk.old_blocks, NULL, | |
2832 | cstk.start_addr, valu); | |
2833 | ||
2834 | /* For C++, set the block's scope. */ | |
2835 | if (SYMBOL_LANGUAGE (cstk.name) == language_cplus) | |
2836 | cp_set_block_scope (cstk.name, block, | |
2837 | &objfile->objfile_obstack); | |
2838 | } | |
2839 | ||
2840 | newobj = push_context (0, valu); | |
2841 | newobj->name = define_symbol (valu, name, desc, type, objfile); | |
2842 | break; | |
2843 | ||
2844 | default: | |
2845 | define_symbol (valu, name, desc, type, objfile); | |
2846 | break; | |
2847 | } | |
2848 | } | |
2849 | break; | |
2850 | ||
2851 | /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it | |
2852 | for a bunch of other flags, too. Someday we may parse their | |
2853 | flags; for now we ignore theirs and hope they'll ignore ours. */ | |
2854 | case N_OPT: /* Solaris 2: Compiler options. */ | |
2855 | if (name) | |
2856 | { | |
2857 | if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0) | |
2858 | { | |
2859 | processing_gcc_compilation = 2; | |
2860 | } | |
2861 | else | |
2862 | n_opt_found = 1; | |
2863 | } | |
2864 | break; | |
2865 | ||
2866 | case N_MAIN: /* Name of main routine. */ | |
2867 | /* FIXME: If one has a symbol file with N_MAIN and then replaces | |
2868 | it with a symbol file with "main" and without N_MAIN. I'm | |
2869 | not sure exactly what rule to follow but probably something | |
2870 | like: N_MAIN takes precedence over "main" no matter what | |
2871 | objfile it is in; If there is more than one N_MAIN, choose | |
2872 | the one in the symfile_objfile; If there is more than one | |
2873 | N_MAIN within a given objfile, complain() and choose | |
2874 | arbitrarily. (kingdon) */ | |
2875 | if (name != NULL) | |
2876 | set_objfile_main_name (objfile, name, language_unknown); | |
2877 | break; | |
2878 | ||
2879 | /* The following symbol types can be ignored. */ | |
2880 | case N_OBJ: /* Solaris 2: Object file dir and name. */ | |
2881 | case N_PATCH: /* Solaris 2: Patch Run Time Checker. */ | |
2882 | /* N_UNDF: Solaris 2: File separator mark. */ | |
2883 | /* N_UNDF: -- we will never encounter it, since we only process | |
2884 | one file's symbols at once. */ | |
2885 | case N_ENDM: /* Solaris 2: End of module. */ | |
2886 | case N_ALIAS: /* SunPro F77: alias name, ignore for now. */ | |
2887 | break; | |
2888 | } | |
2889 | ||
2890 | /* '#' is a GNU C extension to allow one symbol to refer to another | |
2891 | related symbol. | |
2892 | ||
2893 | Generally this is used so that an alias can refer to its main | |
2894 | symbol. */ | |
2895 | gdb_assert (name); | |
2896 | if (name[0] == '#') | |
2897 | { | |
2898 | /* Initialize symbol reference names and determine if this is a | |
2899 | definition. If a symbol reference is being defined, go ahead | |
2900 | and add it. Otherwise, just return. */ | |
2901 | ||
2902 | const char *s = name; | |
2903 | int refnum; | |
2904 | ||
2905 | /* If this stab defines a new reference ID that is not on the | |
2906 | reference list, then put it on the reference list. | |
2907 | ||
2908 | We go ahead and advance NAME past the reference, even though | |
2909 | it is not strictly necessary at this time. */ | |
2910 | refnum = symbol_reference_defined (&s); | |
2911 | if (refnum >= 0) | |
2912 | if (!ref_search (refnum)) | |
2913 | ref_add (refnum, 0, name, valu); | |
2914 | name = s; | |
2915 | } | |
2916 | ||
2917 | previous_stab_code = type; | |
2918 | } | |
2919 | \f | |
2920 | /* FIXME: The only difference between this and elfstab_build_psymtabs | |
2921 | is the call to install_minimal_symbols for elf, and the support for | |
2922 | split sections. If the differences are really that small, the code | |
2923 | should be shared. */ | |
2924 | ||
2925 | /* Scan and build partial symbols for an coff symbol file. | |
2926 | The coff file has already been processed to get its minimal symbols. | |
2927 | ||
2928 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read | |
2929 | rolled into one. | |
2930 | ||
2931 | OBJFILE is the object file we are reading symbols from. | |
2932 | ADDR is the address relative to which the symbols are (e.g. | |
2933 | the base address of the text segment). | |
2934 | TEXTADDR is the address of the text section. | |
2935 | TEXTSIZE is the size of the text section. | |
2936 | STABSECTS is the list of .stab sections in OBJFILE. | |
2937 | STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the | |
2938 | .stabstr section exists. | |
2939 | ||
2940 | This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, | |
2941 | adjusted for coff details. */ | |
2942 | ||
2943 | void | |
2944 | coffstab_build_psymtabs (struct objfile *objfile, | |
2945 | CORE_ADDR textaddr, unsigned int textsize, | |
2946 | const std::vector<asection *> &stabsects, | |
2947 | file_ptr stabstroffset, unsigned int stabstrsize) | |
2948 | { | |
2949 | int val; | |
2950 | bfd *sym_bfd = objfile->obfd; | |
2951 | char *name = bfd_get_filename (sym_bfd); | |
2952 | unsigned int stabsize; | |
2953 | ||
2954 | /* Allocate struct to keep track of stab reading. */ | |
2955 | struct dbx_symfile_info *dbx = XCNEW (struct dbx_symfile_info); | |
2956 | set_objfile_data (objfile, dbx_objfile_data_key, dbx); | |
2957 | ||
2958 | DBX_TEXT_ADDR (objfile) = textaddr; | |
2959 | DBX_TEXT_SIZE (objfile) = textsize; | |
2960 | ||
2961 | #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ | |
2962 | DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE; | |
2963 | DBX_STRINGTAB_SIZE (objfile) = stabstrsize; | |
2964 | ||
2965 | if (stabstrsize > bfd_get_size (sym_bfd)) | |
2966 | error (_("ridiculous string table size: %d bytes"), stabstrsize); | |
2967 | DBX_STRINGTAB (objfile) = (char *) | |
2968 | obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1); | |
2969 | OBJSTAT (objfile, sz_strtab += stabstrsize + 1); | |
2970 | ||
2971 | /* Now read in the string table in one big gulp. */ | |
2972 | ||
2973 | val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); | |
2974 | if (val < 0) | |
2975 | perror_with_name (name); | |
2976 | val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); | |
2977 | if (val != stabstrsize) | |
2978 | perror_with_name (name); | |
2979 | ||
2980 | stabsread_new_init (); | |
2981 | free_header_files (); | |
2982 | init_header_files (); | |
2983 | ||
2984 | processing_acc_compilation = 1; | |
2985 | ||
2986 | /* In a coff file, we've already installed the minimal symbols that came | |
2987 | from the coff (non-stab) symbol table, so always act like an | |
2988 | incremental load here. */ | |
2989 | scoped_restore save_symbuf_sections | |
2990 | = make_scoped_restore (&symbuf_sections); | |
2991 | if (stabsects.size () == 1) | |
2992 | { | |
2993 | stabsize = bfd_section_size (sym_bfd, stabsects[0]); | |
2994 | DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); | |
2995 | DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos; | |
2996 | } | |
2997 | else | |
2998 | { | |
2999 | DBX_SYMCOUNT (objfile) = 0; | |
3000 | for (asection *section : stabsects) | |
3001 | { | |
3002 | stabsize = bfd_section_size (sym_bfd, section); | |
3003 | DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile); | |
3004 | } | |
3005 | ||
3006 | DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos; | |
3007 | ||
3008 | sect_idx = 1; | |
3009 | symbuf_sections = &stabsects; | |
3010 | symbuf_left = bfd_section_size (sym_bfd, stabsects[0]); | |
3011 | symbuf_read = 0; | |
3012 | } | |
3013 | ||
3014 | dbx_symfile_read (objfile, 0); | |
3015 | } | |
3016 | \f | |
3017 | /* Scan and build partial symbols for an ELF symbol file. | |
3018 | This ELF file has already been processed to get its minimal symbols. | |
3019 | ||
3020 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read | |
3021 | rolled into one. | |
3022 | ||
3023 | OBJFILE is the object file we are reading symbols from. | |
3024 | ADDR is the address relative to which the symbols are (e.g. | |
3025 | the base address of the text segment). | |
3026 | STABSECT is the BFD section information for the .stab section. | |
3027 | STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the | |
3028 | .stabstr section exists. | |
3029 | ||
3030 | This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, | |
3031 | adjusted for elf details. */ | |
3032 | ||
3033 | void | |
3034 | elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect, | |
3035 | file_ptr stabstroffset, unsigned int stabstrsize) | |
3036 | { | |
3037 | int val; | |
3038 | bfd *sym_bfd = objfile->obfd; | |
3039 | char *name = bfd_get_filename (sym_bfd); | |
3040 | ||
3041 | stabsread_new_init (); | |
3042 | ||
3043 | /* Allocate struct to keep track of stab reading. */ | |
3044 | struct dbx_symfile_info *dbx = XCNEW (struct dbx_symfile_info); | |
3045 | set_objfile_data (objfile, dbx_objfile_data_key, dbx); | |
3046 | ||
3047 | /* Find the first and last text address. dbx_symfile_read seems to | |
3048 | want this. */ | |
3049 | find_text_range (sym_bfd, objfile); | |
3050 | ||
3051 | #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ | |
3052 | DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; | |
3053 | DBX_SYMCOUNT (objfile) | |
3054 | = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile); | |
3055 | DBX_STRINGTAB_SIZE (objfile) = stabstrsize; | |
3056 | DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; | |
3057 | DBX_STAB_SECTION (objfile) = stabsect; | |
3058 | ||
3059 | if (stabstrsize > bfd_get_size (sym_bfd)) | |
3060 | error (_("ridiculous string table size: %d bytes"), stabstrsize); | |
3061 | DBX_STRINGTAB (objfile) = (char *) | |
3062 | obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1); | |
3063 | OBJSTAT (objfile, sz_strtab += stabstrsize + 1); | |
3064 | ||
3065 | /* Now read in the string table in one big gulp. */ | |
3066 | ||
3067 | val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); | |
3068 | if (val < 0) | |
3069 | perror_with_name (name); | |
3070 | val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd); | |
3071 | if (val != stabstrsize) | |
3072 | perror_with_name (name); | |
3073 | ||
3074 | stabsread_new_init (); | |
3075 | free_header_files (); | |
3076 | init_header_files (); | |
3077 | ||
3078 | processing_acc_compilation = 1; | |
3079 | ||
3080 | symbuf_read = 0; | |
3081 | symbuf_left = bfd_section_size (objfile->obfd, stabsect); | |
3082 | ||
3083 | scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data); | |
3084 | gdb::unique_xmalloc_ptr<gdb_byte> data_holder; | |
3085 | ||
3086 | stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL); | |
3087 | if (stabs_data) | |
3088 | data_holder.reset (stabs_data); | |
3089 | ||
3090 | /* In an elf file, we've already installed the minimal symbols that came | |
3091 | from the elf (non-stab) symbol table, so always act like an | |
3092 | incremental load here. dbx_symfile_read should not generate any new | |
3093 | minimal symbols, since we will have already read the ELF dynamic symbol | |
3094 | table and normal symbol entries won't be in the ".stab" section; but in | |
3095 | case it does, it will install them itself. */ | |
3096 | dbx_symfile_read (objfile, 0); | |
3097 | } | |
3098 | \f | |
3099 | /* Scan and build partial symbols for a file with special sections for stabs | |
3100 | and stabstrings. The file has already been processed to get its minimal | |
3101 | symbols, and any other symbols that might be necessary to resolve GSYMs. | |
3102 | ||
3103 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read | |
3104 | rolled into one. | |
3105 | ||
3106 | OBJFILE is the object file we are reading symbols from. | |
3107 | ADDR is the address relative to which the symbols are (e.g. the base address | |
3108 | of the text segment). | |
3109 | STAB_NAME is the name of the section that contains the stabs. | |
3110 | STABSTR_NAME is the name of the section that contains the stab strings. | |
3111 | ||
3112 | This routine is mostly copied from dbx_symfile_init and | |
3113 | dbx_symfile_read. */ | |
3114 | ||
3115 | void | |
3116 | stabsect_build_psymtabs (struct objfile *objfile, char *stab_name, | |
3117 | char *stabstr_name, char *text_name) | |
3118 | { | |
3119 | int val; | |
3120 | bfd *sym_bfd = objfile->obfd; | |
3121 | char *name = bfd_get_filename (sym_bfd); | |
3122 | asection *stabsect; | |
3123 | asection *stabstrsect; | |
3124 | asection *text_sect; | |
3125 | struct dbx_symfile_info *dbx; | |
3126 | ||
3127 | stabsect = bfd_get_section_by_name (sym_bfd, stab_name); | |
3128 | stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name); | |
3129 | ||
3130 | if (!stabsect) | |
3131 | return; | |
3132 | ||
3133 | if (!stabstrsect) | |
3134 | error (_("stabsect_build_psymtabs: Found stabs (%s), " | |
3135 | "but not string section (%s)"), | |
3136 | stab_name, stabstr_name); | |
3137 | ||
3138 | dbx = XCNEW (struct dbx_symfile_info); | |
3139 | set_objfile_data (objfile, dbx_objfile_data_key, dbx); | |
3140 | ||
3141 | text_sect = bfd_get_section_by_name (sym_bfd, text_name); | |
3142 | if (!text_sect) | |
3143 | error (_("Can't find %s section in symbol file"), text_name); | |
3144 | DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect); | |
3145 | DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect); | |
3146 | ||
3147 | DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist); | |
3148 | DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect) | |
3149 | / DBX_SYMBOL_SIZE (objfile); | |
3150 | DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect); | |
3151 | DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING | |
3152 | INSIDE BFD DATA | |
3153 | STRUCTURES */ | |
3154 | ||
3155 | if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) | |
3156 | error (_("ridiculous string table size: %d bytes"), | |
3157 | DBX_STRINGTAB_SIZE (objfile)); | |
3158 | DBX_STRINGTAB (objfile) = (char *) | |
3159 | obstack_alloc (&objfile->objfile_obstack, | |
3160 | DBX_STRINGTAB_SIZE (objfile) + 1); | |
3161 | OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1); | |
3162 | ||
3163 | /* Now read in the string table in one big gulp. */ | |
3164 | ||
3165 | val = bfd_get_section_contents (sym_bfd, /* bfd */ | |
3166 | stabstrsect, /* bfd section */ | |
3167 | DBX_STRINGTAB (objfile), /* input buffer */ | |
3168 | 0, /* offset into section */ | |
3169 | DBX_STRINGTAB_SIZE (objfile)); /* amount to | |
3170 | read */ | |
3171 | ||
3172 | if (!val) | |
3173 | perror_with_name (name); | |
3174 | ||
3175 | stabsread_new_init (); | |
3176 | free_header_files (); | |
3177 | init_header_files (); | |
3178 | ||
3179 | /* Now, do an incremental load. */ | |
3180 | ||
3181 | processing_acc_compilation = 1; | |
3182 | dbx_symfile_read (objfile, 0); | |
3183 | } | |
3184 | \f | |
3185 | static const struct sym_fns aout_sym_fns = | |
3186 | { | |
3187 | dbx_new_init, /* init anything gbl to entire symtab */ | |
3188 | dbx_symfile_init, /* read initial info, setup for sym_read() */ | |
3189 | dbx_symfile_read, /* read a symbol file into symtab */ | |
3190 | NULL, /* sym_read_psymbols */ | |
3191 | dbx_symfile_finish, /* finished with file, cleanup */ | |
3192 | default_symfile_offsets, /* parse user's offsets to internal form */ | |
3193 | default_symfile_segments, /* Get segment information from a file. */ | |
3194 | NULL, | |
3195 | default_symfile_relocate, /* Relocate a debug section. */ | |
3196 | NULL, /* sym_probe_fns */ | |
3197 | &psym_functions | |
3198 | }; | |
3199 | ||
3200 | void | |
3201 | _initialize_dbxread (void) | |
3202 | { | |
3203 | add_symtab_fns (bfd_target_aout_flavour, &aout_sym_fns); | |
3204 | ||
3205 | dbx_objfile_data_key | |
3206 | = register_objfile_data_with_cleanup (NULL, dbx_free_symfile_info); | |
3207 | } |