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bd5635a1 | 1 | /* Read dbx symbol tables and convert to internal format, for GDB. |
65ce5df4 JG |
2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993 |
3 | Free Software Foundation, Inc. | |
bd5635a1 RP |
4 | |
5 | This file is part of GDB. | |
6 | ||
c3a21801 | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
c3a21801 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
c3a21801 | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
c3a21801 JG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
9404978d MT |
20 | |
21 | /* This module provides three functions: dbx_symfile_init, | |
22 | which initializes to read a symbol file; dbx_new_init, which | |
23 | discards existing cached information when all symbols are being | |
24 | discarded; and dbx_symfile_read, which reads a symbol table | |
25 | from a file. | |
26 | ||
27 | dbx_symfile_read only does the minimum work necessary for letting the | |
28 | user "name" things symbolically; it does not read the entire symtab. | |
29 | Instead, it reads the external and static symbols and puts them in partial | |
30 | symbol tables. When more extensive information is requested of a | |
31 | file, the corresponding partial symbol table is mutated into a full | |
32 | fledged symbol table by going back and reading the symbols | |
33 | for real. dbx_psymtab_to_symtab() is the function that does this */ | |
bd5635a1 | 34 | |
bd5635a1 | 35 | #include "defs.h" |
318bf84f | 36 | #include <string.h> |
bd5635a1 | 37 | |
9342ecb9 | 38 | #if defined(USG) || defined(__CYGNUSCLIB__) |
bd5635a1 RP |
39 | #include <sys/types.h> |
40 | #include <fcntl.h> | |
bd5635a1 RP |
41 | #endif |
42 | ||
afe4ca15 JG |
43 | #include <obstack.h> |
44 | #include <sys/param.h> | |
021959e2 | 45 | #ifndef NO_SYS_FILE |
afe4ca15 | 46 | #include <sys/file.h> |
021959e2 | 47 | #endif |
afe4ca15 | 48 | #include <sys/stat.h> |
bd5635a1 | 49 | #include <ctype.h> |
afe4ca15 JG |
50 | #include "symtab.h" |
51 | #include "breakpoint.h" | |
52 | #include "command.h" | |
53 | #include "target.h" | |
54 | #include "gdbcore.h" /* for bfd stuff */ | |
ac88ca20 | 55 | #include "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */ |
afe4ca15 JG |
56 | #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ |
57 | #include "symfile.h" | |
3624c875 | 58 | #include "objfiles.h" |
c0302457 | 59 | #include "buildsym.h" |
3416d90b | 60 | #include "stabsread.h" |
2af231b8 | 61 | #include "gdb-stabs.h" |
3416d90b | 62 | #include "demangle.h" |
51b80b00 FF |
63 | #include "language.h" /* Needed inside partial-stab.h */ |
64 | #include "complaints.h" | |
afe4ca15 | 65 | |
7e258d18 PB |
66 | #include "aout/aout64.h" |
67 | #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ | |
bd5635a1 | 68 | |
2c7ab4ca JK |
69 | #if !defined (SEEK_SET) |
70 | #define SEEK_SET 0 | |
71 | #define SEEK_CUR 1 | |
72 | #endif | |
73 | ||
4a35d6e9 FF |
74 | /* Each partial symbol table entry contains a pointer to private data for the |
75 | read_symtab() function to use when expanding a partial symbol table entry | |
76 | to a full symbol table entry. | |
77 | ||
78 | For dbxread this structure contains the offset within the file symbol table | |
79 | of first local symbol for this file, and length (in bytes) of the section | |
80 | of the symbol table devoted to this file's symbols (actually, the section | |
9342ecb9 JG |
81 | bracketed may contain more than just this file's symbols). It also contains |
82 | further information needed to locate the symbols if they are in an ELF file. | |
83 | ||
84 | If ldsymlen is 0, the only reason for this thing's existence is the | |
85 | dependency list. Nothing else will happen when it is read in. */ | |
4a35d6e9 FF |
86 | |
87 | #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) | |
88 | #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) | |
9342ecb9 JG |
89 | #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private)) |
90 | #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size) | |
91 | #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset) | |
92 | #define STRING_OFFSET(p) (SYMLOC(p)->string_offset) | |
93 | #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset) | |
4a35d6e9 FF |
94 | |
95 | struct symloc { | |
96 | int ldsymoff; | |
97 | int ldsymlen; | |
9342ecb9 JG |
98 | int symbol_size; |
99 | int symbol_offset; | |
100 | int string_offset; | |
101 | int file_string_offset; | |
4a35d6e9 FF |
102 | }; |
103 | ||
bd5635a1 RP |
104 | /* Macro to determine which symbols to ignore when reading the first symbol |
105 | of a file. Some machines override this definition. */ | |
106 | #ifndef IGNORE_SYMBOL | |
107 | /* This code is used on Ultrix systems. Ignore it */ | |
108 | #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS) | |
109 | #endif | |
110 | ||
111 | /* Macro for name of symbol to indicate a file compiled with gcc. */ | |
112 | #ifndef GCC_COMPILED_FLAG_SYMBOL | |
113 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." | |
114 | #endif | |
115 | ||
0cf9329b PB |
116 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
117 | #ifndef GCC2_COMPILED_FLAG_SYMBOL | |
118 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." | |
119 | #endif | |
120 | ||
bd5635a1 RP |
121 | /* Define this as 1 if a pcc declaration of a char or short argument |
122 | gives the correct address. Otherwise assume pcc gives the | |
123 | address of the corresponding int, which is not the same on a | |
124 | big-endian machine. */ | |
125 | ||
126 | #ifndef BELIEVE_PCC_PROMOTION | |
127 | #define BELIEVE_PCC_PROMOTION 0 | |
128 | #endif | |
c0302457 | 129 | |
2e4964ad FF |
130 | /* Remember what we deduced to be the source language of this psymtab. */ |
131 | ||
132 | static enum language psymtab_language = language_unknown; | |
133 | ||
bd5635a1 RP |
134 | /* Nonzero means give verbose info on gdb action. From main.c. */ |
135 | extern int info_verbose; | |
136 | ||
7d9884b9 | 137 | /* The BFD for this file -- implicit parameter to next_symbol_text. */ |
bd5635a1 | 138 | |
c0302457 | 139 | static bfd *symfile_bfd; |
bd5635a1 | 140 | |
afe4ca15 JG |
141 | /* The size of each symbol in the symbol file (in external form). |
142 | This is set by dbx_symfile_read when building psymtabs, and by | |
143 | dbx_psymtab_to_symtab when building symtabs. */ | |
144 | ||
145 | static unsigned symbol_size; | |
146 | ||
9342ecb9 JG |
147 | /* This is the offset of the symbol table in the executable file */ |
148 | static unsigned symbol_table_offset; | |
149 | ||
150 | /* This is the offset of the string table in the executable file */ | |
151 | static unsigned string_table_offset; | |
152 | ||
153 | /* For elf+stab executables, the n_strx field is not a simple index | |
154 | into the string table. Instead, each .o file has a base offset | |
155 | in the string table, and the associated symbols contain offsets | |
156 | from this base. The following two variables contain the base | |
157 | offset for the current and next .o files. */ | |
158 | static unsigned int file_string_table_offset; | |
159 | static unsigned int next_file_string_table_offset; | |
160 | ||
bd5635a1 RP |
161 | /* Complaints about the symbols we have encountered. */ |
162 | ||
bd5635a1 RP |
163 | struct complaint lbrac_complaint = |
164 | {"bad block start address patched", 0, 0}; | |
165 | ||
bd5635a1 RP |
166 | struct complaint string_table_offset_complaint = |
167 | {"bad string table offset in symbol %d", 0, 0}; | |
168 | ||
169 | struct complaint unknown_symtype_complaint = | |
0c4d2cc2 | 170 | {"unknown symbol type %s", 0, 0}; |
bd5635a1 | 171 | |
65ce5df4 JG |
172 | struct complaint unknown_symchar_complaint = |
173 | {"unknown symbol type character `%c'", 0, 0}; | |
174 | ||
bd5635a1 RP |
175 | struct complaint lbrac_rbrac_complaint = |
176 | {"block start larger than block end", 0, 0}; | |
7d9884b9 JG |
177 | |
178 | struct complaint lbrac_unmatched_complaint = | |
179 | {"unmatched N_LBRAC before symtab pos %d", 0, 0}; | |
180 | ||
181 | struct complaint lbrac_mismatch_complaint = | |
182 | {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0}; | |
9342ecb9 JG |
183 | |
184 | struct complaint repeated_header_complaint = | |
185 | {"\"repeated\" header file not previously seen, at symtab pos %d", 0, 0}; | |
186 | ||
187 | struct complaint repeated_header_name_complaint = | |
188 | {"\"repeated\" header file not previously seen, named %s", 0, 0}; | |
bd5635a1 | 189 | \f |
bd5635a1 RP |
190 | /* During initial symbol readin, we need to have a structure to keep |
191 | track of which psymtabs have which bincls in them. This structure | |
192 | is used during readin to setup the list of dependencies within each | |
193 | partial symbol table. */ | |
194 | ||
195 | struct header_file_location | |
196 | { | |
197 | char *name; /* Name of header file */ | |
198 | int instance; /* See above */ | |
199 | struct partial_symtab *pst; /* Partial symtab that has the | |
200 | BINCL/EINCL defs for this file */ | |
201 | }; | |
202 | ||
203 | /* The actual list and controling variables */ | |
204 | static struct header_file_location *bincl_list, *next_bincl; | |
205 | static int bincls_allocated; | |
206 | ||
021959e2 JG |
207 | /* Local function prototypes */ |
208 | ||
209 | static void | |
80d68b1d FF |
210 | free_header_files PARAMS ((void)); |
211 | ||
212 | static void | |
213 | init_header_files PARAMS ((void)); | |
021959e2 | 214 | |
574dac8e JK |
215 | static void |
216 | read_ofile_symtab PARAMS ((struct partial_symtab *)); | |
021959e2 JG |
217 | |
218 | static void | |
219 | dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
220 | ||
221 | static void | |
4c07f28d | 222 | dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); |
021959e2 JG |
223 | |
224 | static void | |
2af231b8 JG |
225 | read_dbx_symtab PARAMS ((struct section_offsets *, struct objfile *, |
226 | CORE_ADDR, int)); | |
021959e2 JG |
227 | |
228 | static void | |
229 | free_bincl_list PARAMS ((struct objfile *)); | |
230 | ||
231 | static struct partial_symtab * | |
232 | find_corresponding_bincl_psymtab PARAMS ((char *, int)); | |
233 | ||
234 | static void | |
235 | add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int)); | |
236 | ||
237 | static void | |
238 | init_bincl_list PARAMS ((int, struct objfile *)); | |
239 | ||
240 | static void | |
3624c875 | 241 | init_psymbol_list PARAMS ((struct objfile *)); |
021959e2 JG |
242 | |
243 | static char * | |
244 | dbx_next_symbol_text PARAMS ((void)); | |
245 | ||
246 | static void | |
247 | fill_symbuf PARAMS ((bfd *)); | |
248 | ||
249 | static void | |
80d68b1d FF |
250 | dbx_symfile_init PARAMS ((struct objfile *)); |
251 | ||
252 | static void | |
253 | dbx_new_init PARAMS ((struct objfile *)); | |
021959e2 JG |
254 | |
255 | static void | |
2af231b8 | 256 | dbx_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); |
021959e2 JG |
257 | |
258 | static void | |
80d68b1d | 259 | dbx_symfile_finish PARAMS ((struct objfile *)); |
021959e2 JG |
260 | |
261 | static void | |
262 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); | |
263 | ||
264 | static void | |
265 | add_new_header_file PARAMS ((char *, int)); | |
266 | ||
267 | static void | |
268 | add_old_header_file PARAMS ((char *, int)); | |
269 | ||
270 | static void | |
271 | add_this_object_header_file PARAMS ((int)); | |
272 | ||
80d68b1d | 273 | /* Free up old header file tables */ |
bd5635a1 | 274 | |
021959e2 | 275 | static void |
80d68b1d | 276 | free_header_files () |
bd5635a1 RP |
277 | { |
278 | register int i; | |
bd5635a1 | 279 | |
80d68b1d FF |
280 | if (header_files != NULL) |
281 | { | |
282 | for (i = 0; i < n_header_files; i++) | |
283 | { | |
284 | free (header_files[i].name); | |
285 | } | |
ac88ca20 | 286 | free ((PTR)header_files); |
80d68b1d FF |
287 | header_files = NULL; |
288 | n_header_files = 0; | |
289 | } | |
290 | if (this_object_header_files) | |
291 | { | |
ac88ca20 | 292 | free ((PTR)this_object_header_files); |
80d68b1d FF |
293 | this_object_header_files = NULL; |
294 | } | |
295 | n_allocated_header_files = 0; | |
296 | n_allocated_this_object_header_files = 0; | |
297 | } | |
298 | ||
299 | /* Allocate new header file tables */ | |
300 | ||
301 | static void | |
302 | init_header_files () | |
303 | { | |
bd5635a1 | 304 | n_header_files = 0; |
80d68b1d FF |
305 | n_allocated_header_files = 10; |
306 | header_files = (struct header_file *) | |
307 | xmalloc (10 * sizeof (struct header_file)); | |
bd5635a1 RP |
308 | |
309 | n_allocated_this_object_header_files = 10; | |
310 | this_object_header_files = (int *) xmalloc (10 * sizeof (int)); | |
311 | } | |
312 | ||
bd5635a1 RP |
313 | /* Add header file number I for this object file |
314 | at the next successive FILENUM. */ | |
315 | ||
316 | static void | |
317 | add_this_object_header_file (i) | |
318 | int i; | |
319 | { | |
320 | if (n_this_object_header_files == n_allocated_this_object_header_files) | |
321 | { | |
322 | n_allocated_this_object_header_files *= 2; | |
323 | this_object_header_files | |
021959e2 | 324 | = (int *) xrealloc ((char *) this_object_header_files, |
bd5635a1 RP |
325 | n_allocated_this_object_header_files * sizeof (int)); |
326 | } | |
327 | ||
328 | this_object_header_files[n_this_object_header_files++] = i; | |
329 | } | |
330 | ||
331 | /* Add to this file an "old" header file, one already seen in | |
332 | a previous object file. NAME is the header file's name. | |
333 | INSTANCE is its instance code, to select among multiple | |
334 | symbol tables for the same header file. */ | |
335 | ||
336 | static void | |
337 | add_old_header_file (name, instance) | |
338 | char *name; | |
339 | int instance; | |
340 | { | |
341 | register struct header_file *p = header_files; | |
342 | register int i; | |
343 | ||
344 | for (i = 0; i < n_header_files; i++) | |
2e4964ad | 345 | if (STREQ (p[i].name, name) && instance == p[i].instance) |
bd5635a1 RP |
346 | { |
347 | add_this_object_header_file (i); | |
348 | return; | |
349 | } | |
51b80b00 | 350 | complain (&repeated_header_complaint, symnum); |
9342ecb9 | 351 | complain (&repeated_header_name_complaint, name); |
bd5635a1 RP |
352 | } |
353 | ||
354 | /* Add to this file a "new" header file: definitions for its types follow. | |
355 | NAME is the header file's name. | |
356 | Most often this happens only once for each distinct header file, | |
357 | but not necessarily. If it happens more than once, INSTANCE has | |
358 | a different value each time, and references to the header file | |
359 | use INSTANCE values to select among them. | |
360 | ||
361 | dbx output contains "begin" and "end" markers for each new header file, | |
362 | but at this level we just need to know which files there have been; | |
363 | so we record the file when its "begin" is seen and ignore the "end". */ | |
364 | ||
365 | static void | |
366 | add_new_header_file (name, instance) | |
367 | char *name; | |
368 | int instance; | |
369 | { | |
370 | register int i; | |
bd5635a1 RP |
371 | |
372 | /* Make sure there is room for one more header file. */ | |
373 | ||
374 | if (n_header_files == n_allocated_header_files) | |
375 | { | |
376 | n_allocated_header_files *= 2; | |
377 | header_files = (struct header_file *) | |
021959e2 JG |
378 | xrealloc ((char *) header_files, |
379 | (n_allocated_header_files * sizeof (struct header_file))); | |
bd5635a1 RP |
380 | } |
381 | ||
382 | /* Create an entry for this header file. */ | |
383 | ||
384 | i = n_header_files++; | |
385 | header_files[i].name = savestring (name, strlen(name)); | |
386 | header_files[i].instance = instance; | |
387 | header_files[i].length = 10; | |
388 | header_files[i].vector | |
389 | = (struct type **) xmalloc (10 * sizeof (struct type *)); | |
4ed3a9ea | 390 | memset (header_files[i].vector, 0, 10 * sizeof (struct type *)); |
bd5635a1 RP |
391 | |
392 | add_this_object_header_file (i); | |
393 | } | |
394 | ||
bd5635a1 RP |
395 | #if 0 |
396 | static struct type ** | |
397 | explicit_lookup_type (real_filenum, index) | |
398 | int real_filenum, index; | |
399 | { | |
400 | register struct header_file *f = &header_files[real_filenum]; | |
401 | ||
402 | if (index >= f->length) | |
403 | { | |
404 | f->length *= 2; | |
405 | f->vector = (struct type **) | |
406 | xrealloc (f->vector, f->length * sizeof (struct type *)); | |
4ed97c9a RP |
407 | memset (&f->vector[f->length / 2], |
408 | '\0', f->length * sizeof (struct type *) / 2); | |
bd5635a1 RP |
409 | } |
410 | return &f->vector[index]; | |
411 | } | |
412 | #endif | |
413 | \f | |
9bba3334 | 414 | static void |
021959e2 | 415 | record_minimal_symbol (name, address, type, objfile) |
bd5635a1 RP |
416 | char *name; |
417 | CORE_ADDR address; | |
418 | int type; | |
021959e2 | 419 | struct objfile *objfile; |
bd5635a1 | 420 | { |
021959e2 | 421 | enum minimal_symbol_type ms_type; |
0c4d2cc2 | 422 | |
b8ec9a79 JK |
423 | switch (type) |
424 | { | |
425 | case N_TEXT | N_EXT: ms_type = mst_text; break; | |
426 | case N_DATA | N_EXT: ms_type = mst_data; break; | |
427 | case N_BSS | N_EXT: ms_type = mst_bss; break; | |
428 | case N_ABS | N_EXT: ms_type = mst_abs; break; | |
0c4d2cc2 | 429 | #ifdef N_SETV |
b8ec9a79 JK |
430 | case N_SETV | N_EXT: ms_type = mst_data; break; |
431 | case N_SETV: | |
432 | /* I don't think this type actually exists; since a N_SETV is the result | |
433 | of going over many .o files, it doesn't make sense to have one | |
434 | file local. */ | |
435 | ms_type = mst_file_data; | |
436 | break; | |
0c4d2cc2 | 437 | #endif |
05c81f45 SEF |
438 | case N_TEXT: |
439 | /* Don't put gcc_compiled, __gnu_compiled_cplus, and friends into | |
440 | the minimal symbols, because if there is also another symbol | |
441 | at the same address (e.g. the first function of the file), | |
442 | lookup_minimal_symbol_by_pc would have no way of getting the | |
443 | right one. */ | |
444 | if (name[0] == 'g' | |
445 | && (strcmp (name, GCC_COMPILED_FLAG_SYMBOL) == 0 | |
446 | || strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)) | |
447 | return; | |
448 | ||
449 | { | |
450 | char *tempstring = name; | |
451 | if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) | |
452 | ++tempstring; | |
453 | if (STREQN (tempstring, "__gnu_compiled", 14)) | |
454 | return; | |
455 | } | |
456 | ||
b8ec9a79 JK |
457 | case N_NBTEXT: |
458 | case N_FN: | |
459 | case N_FN_SEQ: | |
b8ec9a79 JK |
460 | ms_type = mst_file_text; |
461 | break; | |
462 | ||
463 | case N_DATA: | |
464 | ms_type = mst_file_data; | |
465 | ||
466 | /* Check for __DYNAMIC, which is used by Sun shared libraries. | |
467 | Record it as global even if it's local, not global, so | |
05c81f45 SEF |
468 | lookup_minimal_symbol can find it. We don't check symbol_leading_char |
469 | because for SunOS4 it always is '_'. */ | |
b8ec9a79 JK |
470 | if (name[8] == 'C' && STREQ ("__DYNAMIC", name)) |
471 | ms_type = mst_data; | |
472 | ||
473 | /* Same with virtual function tables, both global and static. */ | |
474 | { | |
475 | char *tempstring = name; | |
476 | if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd)) | |
477 | ++tempstring; | |
478 | if (VTBL_PREFIX_P ((tempstring))) | |
479 | ms_type = mst_data; | |
480 | } | |
481 | break; | |
482 | ||
483 | case N_BSS: | |
484 | ms_type = mst_file_bss; | |
485 | break; | |
486 | ||
021959e2 | 487 | default: ms_type = mst_unknown; break; |
0c4d2cc2 | 488 | } |
bd5635a1 | 489 | |
b8ec9a79 JK |
490 | prim_record_minimal_symbol |
491 | (obsavestring (name, strlen (name), &objfile -> symbol_obstack), | |
492 | address, | |
493 | ms_type); | |
bd5635a1 RP |
494 | } |
495 | \f | |
496 | /* Scan and build partial symbols for a symbol file. | |
497 | We have been initialized by a call to dbx_symfile_init, which | |
3624c875 FF |
498 | put all the relevant info into a "struct dbx_symfile_info", |
499 | hung off the objfile structure. | |
bd5635a1 | 500 | |
2af231b8 JG |
501 | SECTION_OFFSETS contains offsets relative to which the symbols in the |
502 | various sections are (depending where the sections were actually loaded). | |
bd5635a1 RP |
503 | MAINLINE is true if we are reading the main symbol |
504 | table (as opposed to a shared lib or dynamically loaded file). */ | |
505 | ||
9bba3334 | 506 | static void |
2af231b8 | 507 | dbx_symfile_read (objfile, section_offsets, mainline) |
80d68b1d | 508 | struct objfile *objfile; |
2af231b8 | 509 | struct section_offsets *section_offsets; |
bd5635a1 RP |
510 | int mainline; /* FIXME comments above */ |
511 | { | |
80d68b1d | 512 | bfd *sym_bfd; |
bd5635a1 | 513 | int val; |
0eb22669 | 514 | struct cleanup *back_to; |
bd5635a1 | 515 | |
80d68b1d | 516 | sym_bfd = objfile->obfd; |
2c7ab4ca | 517 | val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET); |
bd5635a1 | 518 | if (val < 0) |
80d68b1d | 519 | perror_with_name (objfile->name); |
bd5635a1 | 520 | |
66eeea27 | 521 | /* If we are reinitializing, or if we have never loaded syms yet, init */ |
80d68b1d | 522 | if (mainline || objfile->global_psymbols.size == 0 || objfile->static_psymbols.size == 0) |
3624c875 | 523 | init_psymbol_list (objfile); |
66eeea27 | 524 | |
9342ecb9 JG |
525 | symbol_size = DBX_SYMBOL_SIZE (objfile); |
526 | symbol_table_offset = DBX_SYMTAB_OFFSET (objfile); | |
afe4ca15 | 527 | |
bd5635a1 | 528 | pending_blocks = 0; |
0eb22669 | 529 | back_to = make_cleanup (really_free_pendings, 0); |
bd5635a1 | 530 | |
021959e2 JG |
531 | init_minimal_symbol_collection (); |
532 | make_cleanup (discard_minimal_symbols, 0); | |
bd5635a1 RP |
533 | |
534 | /* Now that the symbol table data of the executable file are all in core, | |
535 | process them and define symbols accordingly. */ | |
536 | ||
2af231b8 | 537 | read_dbx_symtab (section_offsets, objfile, |
3624c875 FF |
538 | bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)), |
539 | bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile))); | |
bd5635a1 | 540 | |
021959e2 JG |
541 | /* Install any minimal symbols that have been collected as the current |
542 | minimal symbols for this objfile. */ | |
bd5635a1 | 543 | |
80d68b1d | 544 | install_minimal_symbols (objfile); |
bd5635a1 | 545 | |
021959e2 | 546 | if (!have_partial_symbols ()) { |
9404978d MT |
547 | wrap_here (""); |
548 | printf_filtered ("(no debugging symbols found)..."); | |
549 | wrap_here (""); | |
550 | } | |
0eb22669 PS |
551 | |
552 | do_cleanups (back_to); | |
bd5635a1 RP |
553 | } |
554 | ||
9404978d MT |
555 | /* Initialize anything that needs initializing when a completely new |
556 | symbol file is specified (not just adding some symbols from another | |
557 | file, e.g. a shared library). */ | |
bd5635a1 | 558 | |
9bba3334 | 559 | static void |
ac88ca20 JG |
560 | dbx_new_init (ignore) |
561 | struct objfile *ignore; | |
bd5635a1 | 562 | { |
3416d90b | 563 | stabsread_new_init (); |
c0302457 | 564 | buildsym_new_init (); |
80d68b1d | 565 | init_header_files (); |
bd5635a1 RP |
566 | } |
567 | ||
568 | ||
569 | /* dbx_symfile_init () | |
570 | is the dbx-specific initialization routine for reading symbols. | |
80d68b1d | 571 | It is passed a struct objfile which contains, among other things, |
bd5635a1 RP |
572 | the BFD for the file whose symbols are being read, and a slot for a pointer |
573 | to "private data" which we fill with goodies. | |
574 | ||
575 | We read the string table into malloc'd space and stash a pointer to it. | |
576 | ||
577 | Since BFD doesn't know how to read debug symbols in a format-independent | |
578 | way (and may never do so...), we have to do it ourselves. We will never | |
579 | be called unless this is an a.out (or very similar) file. | |
580 | FIXME, there should be a cleaner peephole into the BFD environment here. */ | |
581 | ||
69a272c4 FF |
582 | #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */ |
583 | ||
9bba3334 | 584 | static void |
80d68b1d FF |
585 | dbx_symfile_init (objfile) |
586 | struct objfile *objfile; | |
bd5635a1 RP |
587 | { |
588 | int val; | |
80d68b1d | 589 | bfd *sym_bfd = objfile->obfd; |
bd5635a1 | 590 | char *name = bfd_get_filename (sym_bfd); |
69a272c4 | 591 | unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE]; |
bd5635a1 RP |
592 | |
593 | /* Allocate struct to keep track of the symfile */ | |
965a5c32 | 594 | objfile->sym_stab_info = (PTR) |
3624c875 | 595 | xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); |
bd5635a1 RP |
596 | |
597 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
bd5635a1 RP |
598 | #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) |
599 | #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) | |
040b9597 | 600 | |
bd5635a1 RP |
601 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
602 | ||
784fd92b | 603 | DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; |
3624c875 FF |
604 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); |
605 | if (!DBX_TEXT_SECT (objfile)) | |
9342ecb9 JG |
606 | error ("Can't find .text section in symbol file"); |
607 | ||
bf18ac80 | 608 | DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd); |
7da1e27d | 609 | DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); |
9342ecb9 | 610 | DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; |
3624c875 FF |
611 | |
612 | /* Read the string table and stash it away in the psymbol_obstack. It is | |
613 | only needed as long as we need to expand psymbols into full symbols, | |
614 | so when we blow away the psymbol the string table goes away as well. | |
615 | Note that gdb used to use the results of attempting to malloc the | |
616 | string table, based on the size it read, as a form of sanity check | |
617 | for botched byte swapping, on the theory that a byte swapped string | |
618 | table size would be so totally bogus that the malloc would fail. Now | |
619 | that we put in on the psymbol_obstack, we can't do this since gdb gets | |
620 | a fatal error (out of virtual memory) if the size is bogus. We can | |
69a272c4 FF |
621 | however at least check to see if the size is less than the size of |
622 | the size field itself, or larger than the size of the entire file. | |
623 | Note that all valid string tables have a size greater than zero, since | |
624 | the bytes used to hold the size are included in the count. */ | |
3624c875 | 625 | |
69a272c4 FF |
626 | if (STRING_TABLE_OFFSET == 0) |
627 | { | |
65ce5df4 JG |
628 | /* It appears that with the existing bfd code, STRING_TABLE_OFFSET |
629 | will never be zero, even when there is no string table. This | |
630 | would appear to be a bug in bfd. */ | |
69a272c4 FF |
631 | DBX_STRINGTAB_SIZE (objfile) = 0; |
632 | DBX_STRINGTAB (objfile) = NULL; | |
633 | } | |
634 | else | |
635 | { | |
2c7ab4ca | 636 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
69a272c4 FF |
637 | if (val < 0) |
638 | perror_with_name (name); | |
639 | ||
640 | memset ((PTR) size_temp, 0, sizeof (size_temp)); | |
641 | val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd); | |
642 | if (val < 0) | |
65ce5df4 JG |
643 | { |
644 | perror_with_name (name); | |
645 | } | |
646 | else if (val == 0) | |
647 | { | |
648 | /* With the existing bfd code, STRING_TABLE_OFFSET will be set to | |
649 | EOF if there is no string table, and attempting to read the size | |
650 | from EOF will read zero bytes. */ | |
651 | DBX_STRINGTAB_SIZE (objfile) = 0; | |
652 | DBX_STRINGTAB (objfile) = NULL; | |
653 | } | |
654 | else | |
655 | { | |
656 | /* Read some data that would appear to be the string table size. | |
657 | If there really is a string table, then it is probably the right | |
658 | size. Byteswap if necessary and validate the size. Note that | |
659 | the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some | |
660 | random data that happened to be at STRING_TABLE_OFFSET, because | |
661 | bfd can't tell us there is no string table, the sanity checks may | |
662 | or may not catch this. */ | |
663 | DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); | |
664 | ||
665 | if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp) | |
666 | || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) | |
667 | error ("ridiculous string table size (%d bytes).", | |
668 | DBX_STRINGTAB_SIZE (objfile)); | |
669 | ||
670 | DBX_STRINGTAB (objfile) = | |
671 | (char *) obstack_alloc (&objfile -> psymbol_obstack, | |
672 | DBX_STRINGTAB_SIZE (objfile)); | |
673 | ||
674 | /* Now read in the string table in one big gulp. */ | |
675 | ||
2c7ab4ca | 676 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET); |
65ce5df4 JG |
677 | if (val < 0) |
678 | perror_with_name (name); | |
679 | val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, | |
680 | sym_bfd); | |
681 | if (val != DBX_STRINGTAB_SIZE (objfile)) | |
682 | perror_with_name (name); | |
683 | } | |
69a272c4 | 684 | } |
bd5635a1 | 685 | } |
80d68b1d FF |
686 | |
687 | /* Perform any local cleanups required when we are done with a particular | |
688 | objfile. I.E, we are in the process of discarding all symbol information | |
689 | for an objfile, freeing up all memory held for it, and unlinking the | |
690 | objfile struct from the global list of known objfiles. */ | |
691 | ||
692 | static void | |
693 | dbx_symfile_finish (objfile) | |
694 | struct objfile *objfile; | |
695 | { | |
965a5c32 | 696 | if (objfile->sym_stab_info != NULL) |
80d68b1d | 697 | { |
965a5c32 | 698 | mfree (objfile -> md, objfile->sym_stab_info); |
80d68b1d FF |
699 | } |
700 | free_header_files (); | |
701 | } | |
702 | ||
bd5635a1 RP |
703 | \f |
704 | /* Buffer for reading the symbol table entries. */ | |
afe4ca15 | 705 | static struct internal_nlist symbuf[4096]; |
bd5635a1 RP |
706 | static int symbuf_idx; |
707 | static int symbuf_end; | |
708 | ||
9342ecb9 JG |
709 | /* Name of last function encountered. Used in Solaris to approximate |
710 | object file boundaries. */ | |
711 | static char *last_function_name; | |
712 | ||
bd5635a1 RP |
713 | /* The address in memory of the string table of the object file we are |
714 | reading (which might not be the "main" object file, but might be a | |
715 | shared library or some other dynamically loaded thing). This is set | |
716 | by read_dbx_symtab when building psymtabs, and by read_ofile_symtab | |
717 | when building symtabs, and is used only by next_symbol_text. */ | |
718 | static char *stringtab_global; | |
719 | ||
720 | /* Refill the symbol table input buffer | |
721 | and set the variables that control fetching entries from it. | |
722 | Reports an error if no data available. | |
723 | This function can read past the end of the symbol table | |
724 | (into the string table) but this does no harm. */ | |
725 | ||
7d9884b9 JG |
726 | static void |
727 | fill_symbuf (sym_bfd) | |
728 | bfd *sym_bfd; | |
bd5635a1 | 729 | { |
ac88ca20 | 730 | int nbytes = bfd_read ((PTR)symbuf, sizeof (symbuf), 1, sym_bfd); |
bd5635a1 | 731 | if (nbytes < 0) |
7d9884b9 | 732 | perror_with_name (bfd_get_filename (sym_bfd)); |
bd5635a1 RP |
733 | else if (nbytes == 0) |
734 | error ("Premature end of file reading symbol table"); | |
afe4ca15 | 735 | symbuf_end = nbytes / symbol_size; |
bd5635a1 | 736 | symbuf_idx = 0; |
bd5635a1 RP |
737 | } |
738 | ||
7d9884b9 | 739 | #define SWAP_SYMBOL(symp, abfd) \ |
bd5635a1 | 740 | { \ |
7d9884b9 | 741 | (symp)->n_strx = bfd_h_get_32(abfd, \ |
afe4ca15 | 742 | (unsigned char *)&(symp)->n_strx); \ |
7d9884b9 | 743 | (symp)->n_desc = bfd_h_get_16 (abfd, \ |
bd5635a1 | 744 | (unsigned char *)&(symp)->n_desc); \ |
7d9884b9 | 745 | (symp)->n_value = bfd_h_get_32 (abfd, \ |
bd5635a1 RP |
746 | (unsigned char *)&(symp)->n_value); \ |
747 | } | |
748 | ||
749 | /* Invariant: The symbol pointed to by symbuf_idx is the first one | |
750 | that hasn't been swapped. Swap the symbol at the same time | |
751 | that symbuf_idx is incremented. */ | |
752 | ||
753 | /* dbx allows the text of a symbol name to be continued into the | |
754 | next symbol name! When such a continuation is encountered | |
755 | (a \ at the end of the text of a name) | |
756 | call this function to get the continuation. */ | |
757 | ||
021959e2 | 758 | static char * |
aab77d5f | 759 | dbx_next_symbol_text () |
bd5635a1 RP |
760 | { |
761 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 762 | fill_symbuf (symfile_bfd); |
bd5635a1 | 763 | symnum++; |
7d9884b9 | 764 | SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd); |
9342ecb9 JG |
765 | return symbuf[symbuf_idx++].n_strx + stringtab_global |
766 | + file_string_table_offset; | |
bd5635a1 RP |
767 | } |
768 | \f | |
769 | /* Initializes storage for all of the partial symbols that will be | |
770 | created by read_dbx_symtab and subsidiaries. */ | |
771 | ||
772 | static void | |
3624c875 | 773 | init_psymbol_list (objfile) |
021959e2 | 774 | struct objfile *objfile; |
bd5635a1 RP |
775 | { |
776 | /* Free any previously allocated psymbol lists. */ | |
021959e2 | 777 | if (objfile -> global_psymbols.list) |
ac88ca20 | 778 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
021959e2 | 779 | if (objfile -> static_psymbols.list) |
ac88ca20 | 780 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
bd5635a1 RP |
781 | |
782 | /* Current best guess is that there are approximately a twentieth | |
783 | of the total symbols (in a debugging file) are global or static | |
784 | oriented symbols */ | |
3624c875 FF |
785 | objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10; |
786 | objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10; | |
021959e2 | 787 | objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *) |
318bf84f | 788 | xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol)); |
021959e2 | 789 | objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *) |
318bf84f | 790 | xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol)); |
bd5635a1 RP |
791 | } |
792 | ||
793 | /* Initialize the list of bincls to contain none and have some | |
794 | allocated. */ | |
795 | ||
796 | static void | |
021959e2 | 797 | init_bincl_list (number, objfile) |
bd5635a1 | 798 | int number; |
021959e2 | 799 | struct objfile *objfile; |
bd5635a1 RP |
800 | { |
801 | bincls_allocated = number; | |
802 | next_bincl = bincl_list = (struct header_file_location *) | |
318bf84f | 803 | xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location)); |
bd5635a1 RP |
804 | } |
805 | ||
806 | /* Add a bincl to the list. */ | |
807 | ||
808 | static void | |
809 | add_bincl_to_list (pst, name, instance) | |
810 | struct partial_symtab *pst; | |
811 | char *name; | |
812 | int instance; | |
813 | { | |
814 | if (next_bincl >= bincl_list + bincls_allocated) | |
815 | { | |
816 | int offset = next_bincl - bincl_list; | |
817 | bincls_allocated *= 2; | |
818 | bincl_list = (struct header_file_location *) | |
318bf84f | 819 | xmrealloc (pst->objfile->md, (char *)bincl_list, |
bd5635a1 RP |
820 | bincls_allocated * sizeof (struct header_file_location)); |
821 | next_bincl = bincl_list + offset; | |
822 | } | |
823 | next_bincl->pst = pst; | |
824 | next_bincl->instance = instance; | |
825 | next_bincl++->name = name; | |
826 | } | |
827 | ||
828 | /* Given a name, value pair, find the corresponding | |
829 | bincl in the list. Return the partial symtab associated | |
830 | with that header_file_location. */ | |
831 | ||
9bba3334 | 832 | static struct partial_symtab * |
bd5635a1 RP |
833 | find_corresponding_bincl_psymtab (name, instance) |
834 | char *name; | |
835 | int instance; | |
836 | { | |
837 | struct header_file_location *bincl; | |
838 | ||
839 | for (bincl = bincl_list; bincl < next_bincl; bincl++) | |
840 | if (bincl->instance == instance | |
2e4964ad | 841 | && STREQ (name, bincl->name)) |
bd5635a1 RP |
842 | return bincl->pst; |
843 | ||
844 | return (struct partial_symtab *) 0; | |
845 | } | |
846 | ||
847 | /* Free the storage allocated for the bincl list. */ | |
848 | ||
849 | static void | |
021959e2 JG |
850 | free_bincl_list (objfile) |
851 | struct objfile *objfile; | |
bd5635a1 | 852 | { |
ac88ca20 | 853 | mfree (objfile -> md, (PTR)bincl_list); |
bd5635a1 RP |
854 | bincls_allocated = 0; |
855 | } | |
856 | ||
bd5635a1 RP |
857 | /* Given pointers to an a.out symbol table in core containing dbx |
858 | style data, setup partial_symtab's describing each source file for | |
3624c875 FF |
859 | which debugging information is available. |
860 | SYMFILE_NAME is the name of the file we are reading from | |
2af231b8 JG |
861 | and SECTION_OFFSETS is the set of offsets for the various sections |
862 | of the file (a set of zeros if the mainline program). */ | |
bd5635a1 RP |
863 | |
864 | static void | |
2af231b8 JG |
865 | read_dbx_symtab (section_offsets, objfile, text_addr, text_size) |
866 | struct section_offsets *section_offsets; | |
7d9884b9 | 867 | struct objfile *objfile; |
bd5635a1 RP |
868 | CORE_ADDR text_addr; |
869 | int text_size; | |
870 | { | |
ac88ca20 | 871 | register struct internal_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */ |
bd5635a1 | 872 | register char *namestring; |
bd5635a1 RP |
873 | int nsl; |
874 | int past_first_source_file = 0; | |
875 | CORE_ADDR last_o_file_start = 0; | |
0eb22669 | 876 | struct cleanup *back_to; |
7d9884b9 | 877 | bfd *abfd; |
bd5635a1 RP |
878 | |
879 | /* End of the text segment of the executable file. */ | |
880 | CORE_ADDR end_of_text_addr; | |
881 | ||
882 | /* Current partial symtab */ | |
883 | struct partial_symtab *pst; | |
884 | ||
885 | /* List of current psymtab's include files */ | |
886 | char **psymtab_include_list; | |
887 | int includes_allocated; | |
888 | int includes_used; | |
889 | ||
890 | /* Index within current psymtab dependency list */ | |
891 | struct partial_symtab **dependency_list; | |
892 | int dependencies_used, dependencies_allocated; | |
893 | ||
9342ecb9 JG |
894 | /* FIXME. We probably want to change stringtab_global rather than add this |
895 | while processing every symbol entry. FIXME. */ | |
896 | file_string_table_offset = 0; | |
897 | next_file_string_table_offset = 0; | |
898 | ||
3624c875 | 899 | stringtab_global = DBX_STRINGTAB (objfile); |
bd5635a1 RP |
900 | |
901 | pst = (struct partial_symtab *) 0; | |
902 | ||
903 | includes_allocated = 30; | |
904 | includes_used = 0; | |
905 | psymtab_include_list = (char **) alloca (includes_allocated * | |
906 | sizeof (char *)); | |
907 | ||
908 | dependencies_allocated = 30; | |
909 | dependencies_used = 0; | |
910 | dependency_list = | |
911 | (struct partial_symtab **) alloca (dependencies_allocated * | |
912 | sizeof (struct partial_symtab *)); | |
913 | ||
bd5635a1 | 914 | /* Init bincl list */ |
021959e2 | 915 | init_bincl_list (20, objfile); |
0eb22669 | 916 | back_to = make_cleanup (free_bincl_list, objfile); |
bd5635a1 | 917 | |
3416d90b | 918 | last_source_file = NULL; |
bd5635a1 RP |
919 | |
920 | #ifdef END_OF_TEXT_DEFAULT | |
921 | end_of_text_addr = END_OF_TEXT_DEFAULT; | |
922 | #else | |
2af231b8 JG |
923 | end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT] |
924 | + text_size; /* Relocate */ | |
bd5635a1 RP |
925 | #endif |
926 | ||
7d9884b9 JG |
927 | symfile_bfd = objfile->obfd; /* For next_text_symbol */ |
928 | abfd = objfile->obfd; | |
bd5635a1 | 929 | symbuf_end = symbuf_idx = 0; |
aab77d5f | 930 | next_symbol_text_func = dbx_next_symbol_text; |
bd5635a1 | 931 | |
3624c875 | 932 | for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) |
bd5635a1 RP |
933 | { |
934 | /* Get the symbol for this run and pull out some info */ | |
935 | QUIT; /* allow this to be interruptable */ | |
936 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 937 | fill_symbuf (abfd); |
bd5635a1 RP |
938 | bufp = &symbuf[symbuf_idx++]; |
939 | ||
940 | /* | |
941 | * Special case to speed up readin. | |
942 | */ | |
943 | if (bufp->n_type == (unsigned char)N_SLINE) continue; | |
944 | ||
7d9884b9 | 945 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 RP |
946 | |
947 | /* Ok. There is a lot of code duplicated in the rest of this | |
948 | switch statement (for efficiency reasons). Since I don't | |
949 | like duplicating code, I will do my penance here, and | |
950 | describe the code which is duplicated: | |
951 | ||
952 | *) The assignment to namestring. | |
953 | *) The call to strchr. | |
954 | *) The addition of a partial symbol the the two partial | |
955 | symbol lists. This last is a large section of code, so | |
956 | I've imbedded it in the following macro. | |
957 | */ | |
958 | ||
959 | /* Set namestring based on bufp. If the string table index is invalid, | |
960 | give a fake name, and print a single error message per symbol file read, | |
961 | rather than abort the symbol reading or flood the user with messages. */ | |
9342ecb9 JG |
962 | |
963 | /*FIXME: Too many adds and indirections in here for the inner loop. */ | |
bd5635a1 | 964 | #define SET_NAMESTRING()\ |
9342ecb9 JG |
965 | if (((unsigned)bufp->n_strx + file_string_table_offset) >= \ |
966 | DBX_STRINGTAB_SIZE (objfile)) { \ | |
51b80b00 | 967 | complain (&string_table_offset_complaint, symnum); \ |
bd5635a1 RP |
968 | namestring = "foo"; \ |
969 | } else \ | |
9342ecb9 JG |
970 | namestring = bufp->n_strx + file_string_table_offset + \ |
971 | DBX_STRINGTAB (objfile) | |
bd5635a1 | 972 | |
7e258d18 PB |
973 | #define CUR_SYMBOL_TYPE bufp->n_type |
974 | #define CUR_SYMBOL_VALUE bufp->n_value | |
975 | #define DBXREAD_ONLY | |
2af231b8 JG |
976 | #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\ |
977 | start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms) | |
7e258d18 PB |
978 | #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\ |
979 | end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) | |
aab77d5f | 980 | |
7e258d18 | 981 | #include "partial-stab.h" |
bd5635a1 RP |
982 | } |
983 | ||
984 | /* If there's stuff to be cleaned up, clean it up. */ | |
3624c875 | 985 | if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */ |
9342ecb9 JG |
986 | /*FIXME, does this have a bug at start address 0? */ |
987 | && last_o_file_start | |
3624c875 FF |
988 | && objfile -> ei.entry_point < bufp->n_value |
989 | && objfile -> ei.entry_point >= last_o_file_start) | |
bd5635a1 | 990 | { |
3624c875 FF |
991 | objfile -> ei.entry_file_lowpc = last_o_file_start; |
992 | objfile -> ei.entry_file_highpc = bufp->n_value; | |
bd5635a1 RP |
993 | } |
994 | ||
995 | if (pst) | |
996 | { | |
997 | end_psymtab (pst, psymtab_include_list, includes_used, | |
afe4ca15 | 998 | symnum * symbol_size, end_of_text_addr, |
7e258d18 | 999 | dependency_list, dependencies_used); |
bd5635a1 RP |
1000 | } |
1001 | ||
0eb22669 | 1002 | do_cleanups (back_to); |
bd5635a1 RP |
1003 | } |
1004 | ||
4a35d6e9 FF |
1005 | /* Allocate and partially fill a partial symtab. It will be |
1006 | completely filled at the end of the symbol list. | |
1007 | ||
1008 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
1009 | is the address relative to which its symbols are (incremental) or 0 | |
1010 | (normal). */ | |
1011 | ||
bd5635a1 | 1012 | |
7e258d18 | 1013 | struct partial_symtab * |
2af231b8 | 1014 | start_psymtab (objfile, section_offsets, |
bd5635a1 | 1015 | filename, textlow, ldsymoff, global_syms, static_syms) |
7d9884b9 | 1016 | struct objfile *objfile; |
2af231b8 | 1017 | struct section_offsets *section_offsets; |
bd5635a1 RP |
1018 | char *filename; |
1019 | CORE_ADDR textlow; | |
1020 | int ldsymoff; | |
1021 | struct partial_symbol *global_syms; | |
1022 | struct partial_symbol *static_syms; | |
1023 | { | |
1024 | struct partial_symtab *result = | |
2af231b8 | 1025 | start_psymtab_common(objfile, section_offsets, |
021959e2 | 1026 | filename, textlow, global_syms, static_syms); |
bd5635a1 | 1027 | |
021959e2 JG |
1028 | result->read_symtab_private = (char *) |
1029 | obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc)); | |
1030 | LDSYMOFF(result) = ldsymoff; | |
bd5635a1 | 1031 | result->read_symtab = dbx_psymtab_to_symtab; |
9342ecb9 JG |
1032 | SYMBOL_SIZE(result) = symbol_size; |
1033 | SYMBOL_OFFSET(result) = symbol_table_offset; | |
1034 | STRING_OFFSET(result) = string_table_offset; | |
1035 | FILE_STRING_OFFSET(result) = file_string_table_offset; | |
bd5635a1 | 1036 | |
2af231b8 JG |
1037 | /* If we're handling an ELF file, drag some section-relocation info |
1038 | for this source file out of the ELF symbol table, to compensate for | |
1039 | Sun brain death. This replaces the section_offsets in this psymtab, | |
1040 | if successful. */ | |
1041 | elfstab_offset_sections (objfile, result); | |
1042 | ||
2e4964ad FF |
1043 | /* Deduce the source language from the filename for this psymtab. */ |
1044 | psymtab_language = deduce_language_from_filename (filename); | |
1045 | ||
bd5635a1 RP |
1046 | return result; |
1047 | } | |
1048 | ||
cbba020f PS |
1049 | /* Close off the current usage of PST. |
1050 | Returns PST or NULL if the partial symtab was empty and thrown away. | |
bd5635a1 | 1051 | |
cbba020f | 1052 | FIXME: List variables and peculiarities of same. */ |
bd5635a1 | 1053 | |
cbba020f | 1054 | struct partial_symtab * |
bd5635a1 | 1055 | end_psymtab (pst, include_list, num_includes, capping_symbol_offset, |
7e258d18 | 1056 | capping_text, dependency_list, number_dependencies) |
bd5635a1 RP |
1057 | struct partial_symtab *pst; |
1058 | char **include_list; | |
1059 | int num_includes; | |
1060 | int capping_symbol_offset; | |
1061 | CORE_ADDR capping_text; | |
1062 | struct partial_symtab **dependency_list; | |
1063 | int number_dependencies; | |
7e258d18 | 1064 | /* struct partial_symbol *capping_global, *capping_static;*/ |
bd5635a1 RP |
1065 | { |
1066 | int i; | |
9342ecb9 | 1067 | struct partial_symtab *p1; |
021959e2 | 1068 | struct objfile *objfile = pst -> objfile; |
bd5635a1 | 1069 | |
7e258d18 PB |
1070 | if (capping_symbol_offset != -1) |
1071 | LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst); | |
bd5635a1 RP |
1072 | pst->texthigh = capping_text; |
1073 | ||
9342ecb9 JG |
1074 | /* Under Solaris, the N_SO symbols always have a value of 0, |
1075 | instead of the usual address of the .o file. Therefore, | |
1076 | we have to do some tricks to fill in texthigh and textlow. | |
1077 | The first trick is in partial-stab.h: if we see a static | |
1078 | or global function, and the textlow for the current pst | |
1079 | is still 0, then we use that function's address for | |
1080 | the textlow of the pst. | |
1081 | ||
1082 | Now, to fill in texthigh, we remember the last function seen | |
1083 | in the .o file (also in partial-stab.h). Also, there's a hack in | |
1084 | bfd/elf.c and gdb/elfread.c to pass the ELF st_size field | |
1085 | to here via the misc_info field. Therefore, we can fill in | |
1086 | a reliable texthigh by taking the address plus size of the | |
1087 | last function in the file. | |
1088 | ||
1089 | Unfortunately, that does not cover the case where the last function | |
1090 | in the file is static. See the paragraph below for more comments | |
1091 | on this situation. | |
1092 | ||
1093 | Finally, if we have a valid textlow for the current file, we run | |
1094 | down the partial_symtab_list filling in previous texthighs that | |
1095 | are still unknown. */ | |
1096 | ||
bcbf9559 | 1097 | if (pst->texthigh == 0 && last_function_name) { |
9342ecb9 JG |
1098 | char *p; |
1099 | int n; | |
1100 | struct minimal_symbol *minsym; | |
1101 | ||
1102 | p = strchr (last_function_name, ':'); | |
1103 | if (p == NULL) | |
1104 | p = last_function_name; | |
1105 | n = p - last_function_name; | |
1106 | p = alloca (n + 1); | |
1107 | strncpy (p, last_function_name, n); | |
1108 | p[n] = 0; | |
1109 | ||
1110 | minsym = lookup_minimal_symbol (p, objfile); | |
1111 | ||
1112 | if (minsym) { | |
2e4964ad | 1113 | pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + |
5573d7d4 | 1114 | (long) MSYMBOL_INFO (minsym); |
9342ecb9 JG |
1115 | } else { |
1116 | /* This file ends with a static function, and it's | |
1117 | difficult to imagine how hard it would be to track down | |
1118 | the elf symbol. Luckily, most of the time no one will notice, | |
1119 | since the next file will likely be compiled with -g, so | |
1120 | the code below will copy the first fuction's start address | |
1121 | back to our texthigh variable. (Also, if this file is the | |
1122 | last one in a dynamically linked program, texthigh already | |
1123 | has the right value.) If the next file isn't compiled | |
1124 | with -g, then the last function in this file winds up owning | |
1125 | all of the text space up to the next -g file, or the end (minus | |
1126 | shared libraries). This only matters for single stepping, | |
1127 | and even then it will still work, except that it will single | |
1128 | step through all of the covered functions, instead of setting | |
1129 | breakpoints around them as it usualy does. This makes it | |
1130 | pretty slow, but at least it doesn't fail. | |
1131 | ||
1132 | We can fix this with a fairly big change to bfd, but we need | |
1133 | to coordinate better with Cygnus if we want to do that. FIXME. */ | |
1134 | } | |
1135 | last_function_name = NULL; | |
1136 | } | |
1137 | ||
1138 | /* this test will be true if the last .o file is only data */ | |
1139 | if (pst->textlow == 0) | |
1140 | pst->textlow = pst->texthigh; | |
1141 | ||
bcbf9559 JG |
1142 | /* If we know our own starting text address, then walk through all other |
1143 | psymtabs for this objfile, and if any didn't know their ending text | |
1144 | address, set it to our starting address. Take care to not set our | |
1145 | own ending address to our starting address, nor to set addresses on | |
1146 | `dependency' files that have both textlow and texthigh zero. */ | |
9342ecb9 JG |
1147 | if (pst->textlow) { |
1148 | ALL_OBJFILE_PSYMTABS (objfile, p1) { | |
bcbf9559 | 1149 | if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) { |
9342ecb9 JG |
1150 | p1->texthigh = pst->textlow; |
1151 | /* if this file has only data, then make textlow match texthigh */ | |
1152 | if (p1->textlow == 0) | |
1153 | p1->textlow = p1->texthigh; | |
1154 | } | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | /* End of kludge for patching Solaris textlow and texthigh. */ | |
1159 | ||
1160 | ||
bd5635a1 | 1161 | pst->n_global_syms = |
021959e2 | 1162 | objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
bd5635a1 | 1163 | pst->n_static_syms = |
021959e2 | 1164 | objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
bd5635a1 RP |
1165 | |
1166 | pst->number_of_dependencies = number_dependencies; | |
1167 | if (number_dependencies) | |
1168 | { | |
1169 | pst->dependencies = (struct partial_symtab **) | |
021959e2 | 1170 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 | 1171 | number_dependencies * sizeof (struct partial_symtab *)); |
7e258d18 | 1172 | memcpy (pst->dependencies, dependency_list, |
bd5635a1 RP |
1173 | number_dependencies * sizeof (struct partial_symtab *)); |
1174 | } | |
1175 | else | |
1176 | pst->dependencies = 0; | |
1177 | ||
1178 | for (i = 0; i < num_includes; i++) | |
1179 | { | |
bd5635a1 | 1180 | struct partial_symtab *subpst = |
021959e2 | 1181 | allocate_psymtab (include_list[i], objfile); |
7d9884b9 | 1182 | |
2af231b8 | 1183 | subpst->section_offsets = pst->section_offsets; |
021959e2 JG |
1184 | subpst->read_symtab_private = |
1185 | (char *) obstack_alloc (&objfile->psymbol_obstack, | |
1186 | sizeof (struct symloc)); | |
4a35d6e9 FF |
1187 | LDSYMOFF(subpst) = |
1188 | LDSYMLEN(subpst) = | |
bd5635a1 RP |
1189 | subpst->textlow = |
1190 | subpst->texthigh = 0; | |
1191 | ||
3f83182d JG |
1192 | /* We could save slight bits of space by only making one of these, |
1193 | shared by the entire set of include files. FIXME-someday. */ | |
bd5635a1 | 1194 | subpst->dependencies = (struct partial_symtab **) |
021959e2 | 1195 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 RP |
1196 | sizeof (struct partial_symtab *)); |
1197 | subpst->dependencies[0] = pst; | |
1198 | subpst->number_of_dependencies = 1; | |
1199 | ||
1200 | subpst->globals_offset = | |
1201 | subpst->n_global_syms = | |
1202 | subpst->statics_offset = | |
1203 | subpst->n_static_syms = 0; | |
1204 | ||
1205 | subpst->readin = 0; | |
9a822037 | 1206 | subpst->symtab = 0; |
2707b48a | 1207 | subpst->read_symtab = pst->read_symtab; |
bd5635a1 RP |
1208 | } |
1209 | ||
021959e2 | 1210 | sort_pst_symbols (pst); |
bd5635a1 | 1211 | |
f9623881 JG |
1212 | /* If there is already a psymtab or symtab for a file of this name, remove it. |
1213 | (If there is a symtab, more drastic things also happen.) | |
1214 | This happens in VxWorks. */ | |
1215 | free_named_symtabs (pst->filename); | |
1216 | ||
7d9884b9 JG |
1217 | if (num_includes == 0 |
1218 | && number_dependencies == 0 | |
1219 | && pst->n_global_syms == 0 | |
1220 | && pst->n_static_syms == 0) { | |
1221 | /* Throw away this psymtab, it's empty. We can't deallocate it, since | |
1222 | it is on the obstack, but we can forget to chain it on the list. */ | |
318bf84f FF |
1223 | struct partial_symtab *prev_pst; |
1224 | ||
1225 | /* First, snip it out of the psymtab chain */ | |
1226 | ||
1227 | if (pst->objfile->psymtabs == pst) | |
1228 | pst->objfile->psymtabs = pst->next; | |
1229 | else | |
1230 | for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next) | |
1231 | if (prev_pst->next == pst) | |
1232 | prev_pst->next = pst->next; | |
1233 | ||
1234 | /* Next, put it on a free list for recycling */ | |
1235 | ||
1236 | pst->next = pst->objfile->free_psymtabs; | |
1237 | pst->objfile->free_psymtabs = pst; | |
cbba020f PS |
1238 | |
1239 | /* Indicate that psymtab was thrown away. */ | |
1240 | pst = (struct partial_symtab *)NULL; | |
7d9884b9 | 1241 | } |
cbba020f | 1242 | return pst; |
bd5635a1 RP |
1243 | } |
1244 | \f | |
1245 | static void | |
4c07f28d | 1246 | dbx_psymtab_to_symtab_1 (pst) |
bd5635a1 | 1247 | struct partial_symtab *pst; |
bd5635a1 RP |
1248 | { |
1249 | struct cleanup *old_chain; | |
1250 | int i; | |
1251 | ||
1252 | if (!pst) | |
1253 | return; | |
1254 | ||
1255 | if (pst->readin) | |
1256 | { | |
1257 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1258 | pst->filename); | |
1259 | return; | |
1260 | } | |
1261 | ||
afe4ca15 | 1262 | /* Read in all partial symtabs on which this one is dependent */ |
bd5635a1 RP |
1263 | for (i = 0; i < pst->number_of_dependencies; i++) |
1264 | if (!pst->dependencies[i]->readin) | |
1265 | { | |
1266 | /* Inform about additional files that need to be read in. */ | |
1267 | if (info_verbose) | |
1268 | { | |
1269 | fputs_filtered (" ", stdout); | |
1270 | wrap_here (""); | |
1271 | fputs_filtered ("and ", stdout); | |
1272 | wrap_here (""); | |
1273 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
1274 | wrap_here (""); /* Flush output */ | |
1275 | fflush (stdout); | |
1276 | } | |
4c07f28d | 1277 | dbx_psymtab_to_symtab_1 (pst->dependencies[i]); |
bd5635a1 RP |
1278 | } |
1279 | ||
4a35d6e9 | 1280 | if (LDSYMLEN(pst)) /* Otherwise it's a dummy */ |
bd5635a1 RP |
1281 | { |
1282 | /* Init stuff necessary for reading in symbols */ | |
3416d90b | 1283 | stabsread_init (); |
c0302457 | 1284 | buildsym_init (); |
bd5635a1 | 1285 | old_chain = make_cleanup (really_free_pendings, 0); |
9342ecb9 | 1286 | file_string_table_offset = FILE_STRING_OFFSET (pst); |
4c07f28d FF |
1287 | symbol_size = SYMBOL_SIZE (pst); |
1288 | ||
1289 | /* Read in this file's symbols */ | |
2c7ab4ca | 1290 | bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET); |
574dac8e | 1291 | read_ofile_symtab (pst); |
9404978d | 1292 | sort_symtab_syms (pst->symtab); |
bd5635a1 RP |
1293 | |
1294 | do_cleanups (old_chain); | |
1295 | } | |
1296 | ||
1297 | pst->readin = 1; | |
1298 | } | |
1299 | ||
ac88ca20 JG |
1300 | /* Read in all of the symbols for a given psymtab for real. |
1301 | Be verbose about it if the user wants that. */ | |
1302 | ||
bd5635a1 RP |
1303 | static void |
1304 | dbx_psymtab_to_symtab (pst) | |
1305 | struct partial_symtab *pst; | |
1306 | { | |
bd5635a1 | 1307 | bfd *sym_bfd; |
bd5635a1 RP |
1308 | |
1309 | if (!pst) | |
1310 | return; | |
1311 | ||
1312 | if (pst->readin) | |
1313 | { | |
1314 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1315 | pst->filename); | |
1316 | return; | |
1317 | } | |
1318 | ||
4a35d6e9 | 1319 | if (LDSYMLEN(pst) || pst->number_of_dependencies) |
bd5635a1 RP |
1320 | { |
1321 | /* Print the message now, before reading the string table, | |
1322 | to avoid disconcerting pauses. */ | |
1323 | if (info_verbose) | |
1324 | { | |
1325 | printf_filtered ("Reading in symbols for %s...", pst->filename); | |
1326 | fflush (stdout); | |
1327 | } | |
1328 | ||
7d9884b9 | 1329 | sym_bfd = pst->objfile->obfd; |
bd5635a1 | 1330 | |
aab77d5f PB |
1331 | next_symbol_text_func = dbx_next_symbol_text; |
1332 | ||
4c07f28d | 1333 | dbx_psymtab_to_symtab_1 (pst); |
bd5635a1 RP |
1334 | |
1335 | /* Match with global symbols. This only needs to be done once, | |
1336 | after all of the symtabs and dependencies have been read in. */ | |
021959e2 | 1337 | scan_file_globals (pst->objfile); |
bd5635a1 | 1338 | |
bd5635a1 RP |
1339 | /* Finish up the debug error message. */ |
1340 | if (info_verbose) | |
1341 | printf_filtered ("done.\n"); | |
1342 | } | |
1343 | } | |
1344 | ||
574dac8e | 1345 | /* Read in a defined section of a specific object file's symbols. */ |
9342ecb9 | 1346 | |
574dac8e JK |
1347 | static void |
1348 | read_ofile_symtab (pst) | |
1349 | struct partial_symtab *pst; | |
bd5635a1 RP |
1350 | { |
1351 | register char *namestring; | |
7d9884b9 | 1352 | register struct internal_nlist *bufp; |
bd5635a1 | 1353 | unsigned char type; |
afe4ca15 | 1354 | unsigned max_symnum; |
7d9884b9 | 1355 | register bfd *abfd; |
574dac8e JK |
1356 | struct objfile *objfile; |
1357 | int sym_offset; /* Offset to start of symbols to read */ | |
1358 | int sym_size; /* Size of symbols to read */ | |
1359 | CORE_ADDR text_offset; /* Start of text segment for symbols */ | |
1360 | int text_size; /* Size of text segment for symbols */ | |
1361 | struct section_offsets *section_offsets; | |
1362 | ||
1363 | objfile = pst->objfile; | |
1364 | sym_offset = LDSYMOFF(pst); | |
1365 | sym_size = LDSYMLEN(pst); | |
1366 | text_offset = pst->textlow; | |
1367 | text_size = pst->texthigh - pst->textlow; | |
1368 | section_offsets = pst->section_offsets; | |
7d9884b9 | 1369 | |
021959e2 | 1370 | current_objfile = objfile; |
3416d90b | 1371 | subfile_stack = NULL; |
bd5635a1 | 1372 | |
3624c875 | 1373 | stringtab_global = DBX_STRINGTAB (objfile); |
3416d90b | 1374 | last_source_file = NULL; |
bd5635a1 | 1375 | |
7d9884b9 JG |
1376 | abfd = objfile->obfd; |
1377 | symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ | |
bd5635a1 RP |
1378 | symbuf_end = symbuf_idx = 0; |
1379 | ||
1380 | /* It is necessary to actually read one symbol *before* the start | |
1381 | of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL | |
1382 | occurs before the N_SO symbol. | |
1383 | ||
1384 | Detecting this in read_dbx_symtab | |
1385 | would slow down initial readin, so we look for it here instead. */ | |
9342ecb9 | 1386 | if (!processing_acc_compilation && sym_offset >= (int)symbol_size) |
bd5635a1 | 1387 | { |
2c7ab4ca | 1388 | bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR); |
7d9884b9 | 1389 | fill_symbuf (abfd); |
bd5635a1 | 1390 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1391 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1392 | |
afe4ca15 | 1393 | SET_NAMESTRING (); |
bd5635a1 | 1394 | |
1aed6766 SG |
1395 | processing_gcc_compilation = 0; |
1396 | if (bufp->n_type == N_TEXT) | |
1397 | { | |
2e4964ad | 1398 | if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
1aed6766 | 1399 | processing_gcc_compilation = 1; |
2e4964ad | 1400 | else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
1aed6766 SG |
1401 | processing_gcc_compilation = 2; |
1402 | } | |
3416d90b FF |
1403 | |
1404 | /* Try to select a C++ demangling based on the compilation unit | |
1405 | producer. */ | |
1406 | ||
1407 | if (processing_gcc_compilation) | |
1408 | { | |
1aed6766 | 1409 | if (AUTO_DEMANGLING) |
3416d90b FF |
1410 | { |
1411 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1412 | } | |
3416d90b | 1413 | } |
bd5635a1 RP |
1414 | } |
1415 | else | |
1416 | { | |
1417 | /* The N_SO starting this symtab is the first symbol, so we | |
1418 | better not check the symbol before it. I'm not this can | |
1419 | happen, but it doesn't hurt to check for it. */ | |
2c7ab4ca | 1420 | bfd_seek (symfile_bfd, sym_offset, SEEK_CUR); |
bd5635a1 RP |
1421 | processing_gcc_compilation = 0; |
1422 | } | |
1423 | ||
1424 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1425 | fill_symbuf (abfd); |
bd5635a1 RP |
1426 | bufp = &symbuf[symbuf_idx]; |
1427 | if (bufp->n_type != (unsigned char)N_SO) | |
1428 | error("First symbol in segment of executable not a source symbol"); | |
1429 | ||
afe4ca15 JG |
1430 | max_symnum = sym_size / symbol_size; |
1431 | ||
bd5635a1 | 1432 | for (symnum = 0; |
afe4ca15 | 1433 | symnum < max_symnum; |
bd5635a1 RP |
1434 | symnum++) |
1435 | { | |
1436 | QUIT; /* Allow this to be interruptable */ | |
1437 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1438 | fill_symbuf(abfd); |
bd5635a1 | 1439 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1440 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1441 | |
c0302457 | 1442 | type = bufp->n_type; |
bd5635a1 | 1443 | |
afe4ca15 | 1444 | SET_NAMESTRING (); |
bd5635a1 | 1445 | |
7d9884b9 | 1446 | if (type & N_STAB) { |
c55e6167 | 1447 | process_one_symbol (type, bufp->n_desc, bufp->n_value, |
2af231b8 | 1448 | namestring, section_offsets, objfile); |
7d9884b9 | 1449 | } |
bd5635a1 RP |
1450 | /* We skip checking for a new .o or -l file; that should never |
1451 | happen in this routine. */ | |
1aed6766 | 1452 | else if (type == N_TEXT) |
3416d90b FF |
1453 | { |
1454 | /* I don't think this code will ever be executed, because | |
1455 | the GCC_COMPILED_FLAG_SYMBOL usually is right before | |
1456 | the N_SO symbol which starts this source file. | |
1457 | However, there is no reason not to accept | |
1458 | the GCC_COMPILED_FLAG_SYMBOL anywhere. */ | |
1aed6766 | 1459 | |
2e4964ad | 1460 | if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL)) |
1aed6766 | 1461 | processing_gcc_compilation = 1; |
2e4964ad | 1462 | else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL)) |
1aed6766 SG |
1463 | processing_gcc_compilation = 2; |
1464 | ||
1aed6766 | 1465 | if (AUTO_DEMANGLING) |
3416d90b FF |
1466 | { |
1467 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1468 | } | |
3416d90b | 1469 | } |
bd5635a1 RP |
1470 | else if (type & N_EXT || type == (unsigned char)N_TEXT |
1471 | || type == (unsigned char)N_NBTEXT | |
0c4d2cc2 | 1472 | ) { |
bd5635a1 RP |
1473 | /* Global symbol: see if we came across a dbx defintion for |
1474 | a corresponding symbol. If so, store the value. Remove | |
1475 | syms from the chain when their values are stored, but | |
1476 | search the whole chain, as there may be several syms from | |
1477 | different files with the same name. */ | |
1478 | /* This is probably not true. Since the files will be read | |
1479 | in one at a time, each reference to a global symbol will | |
1480 | be satisfied in each file as it appears. So we skip this | |
1481 | section. */ | |
1482 | ; | |
0c4d2cc2 | 1483 | } |
bd5635a1 | 1484 | } |
9404978d | 1485 | |
021959e2 | 1486 | current_objfile = NULL; |
9342ecb9 JG |
1487 | |
1488 | /* In a Solaris elf file, this variable, which comes from the | |
1489 | value of the N_SO symbol, will still be 0. Luckily, text_offset, | |
1490 | which comes from pst->textlow is correct. */ | |
1491 | if (last_source_start_addr == 0) | |
1492 | last_source_start_addr = text_offset; | |
1493 | ||
574dac8e JK |
1494 | pst->symtab = end_symtab (text_offset + text_size, 0, 0, objfile, |
1495 | SECT_OFF_TEXT); | |
3416d90b | 1496 | end_stabs (); |
bd5635a1 | 1497 | } |
574dac8e | 1498 | |
bd5635a1 | 1499 | \f |
c55e6167 JG |
1500 | /* This handles a single symbol from the symbol-file, building symbols |
1501 | into a GDB symtab. It takes these arguments and an implicit argument. | |
1502 | ||
1503 | TYPE is the type field of the ".stab" symbol entry. | |
1504 | DESC is the desc field of the ".stab" entry. | |
1505 | VALU is the value field of the ".stab" entry. | |
1506 | NAME is the symbol name, in our address space. | |
2af231b8 JG |
1507 | SECTION_OFFSETS is a set of amounts by which the sections of this object |
1508 | file were relocated when it was loaded into memory. | |
1509 | All symbols that refer | |
1510 | to memory locations need to be offset by these amounts. | |
9342ecb9 | 1511 | OBJFILE is the object file from which we are reading symbols. |
c55e6167 JG |
1512 | It is used in end_symtab. */ |
1513 | ||
7e258d18 | 1514 | void |
2af231b8 | 1515 | process_one_symbol (type, desc, valu, name, section_offsets, objfile) |
bd5635a1 RP |
1516 | int type, desc; |
1517 | CORE_ADDR valu; | |
1518 | char *name; | |
2af231b8 | 1519 | struct section_offsets *section_offsets; |
9342ecb9 | 1520 | struct objfile *objfile; |
bd5635a1 | 1521 | { |
a5e6391b JK |
1522 | #ifdef SUN_FIXED_LBRAC_BUG |
1523 | /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need | |
1524 | to correct the address of N_LBRAC's. If it is not defined, then | |
1525 | we never need to correct the addresses. */ | |
1526 | ||
0cf9329b | 1527 | /* This records the last pc address we've seen. We depend on there being |
bd5635a1 RP |
1528 | an SLINE or FUN or SO before the first LBRAC, since the variable does |
1529 | not get reset in between reads of different symbol files. */ | |
1530 | static CORE_ADDR last_pc_address; | |
a5e6391b | 1531 | #endif |
8357834f | 1532 | |
bd5635a1 | 1533 | register struct context_stack *new; |
9342ecb9 JG |
1534 | /* This remembers the address of the start of a function. It is used |
1535 | because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are | |
1536 | relative to the current function's start address. On systems | |
2af231b8 JG |
1537 | other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is |
1538 | used to relocate these symbol types rather than SECTION_OFFSETS. */ | |
9342ecb9 | 1539 | static CORE_ADDR function_start_offset; |
bd5635a1 | 1540 | |
574dac8e JK |
1541 | /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative |
1542 | to the function start address. */ | |
1543 | int block_address_function_relative; | |
1544 | ||
8357834f | 1545 | /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source |
b8ec9a79 | 1546 | file. Used to detect the SunPRO solaris compiler. */ |
4d57c599 | 1547 | static int n_opt_found; |
8357834f | 1548 | |
b8ec9a79 JK |
1549 | /* The stab type used for the definition of the last function. |
1550 | N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */ | |
1551 | static int function_stab_type = 0; | |
1552 | ||
574dac8e JK |
1553 | /* This is true for Solaris (and all other stabs-in-elf systems, hopefully, |
1554 | since it would be silly to do things differently from Solaris), and | |
1555 | false for SunOS4 and other a.out file formats. */ | |
1556 | block_address_function_relative = | |
1557 | 0 == strncmp (bfd_get_target (objfile->obfd), "elf", 3); | |
1558 | ||
1559 | if (!block_address_function_relative) | |
1560 | /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the | |
1561 | function start address, so just use the text offset. */ | |
1562 | function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
51b80b00 | 1563 | |
bd5635a1 RP |
1564 | /* Something is wrong if we see real data before |
1565 | seeing a source file name. */ | |
1566 | ||
3416d90b | 1567 | if (last_source_file == NULL && type != (unsigned char)N_SO) |
bd5635a1 | 1568 | { |
a5e6391b JK |
1569 | /* Ignore any symbols which appear before an N_SO symbol. Currently |
1570 | no one puts symbols there, but we should deal gracefully with the | |
1571 | case. A complain()t might be in order (if !IGNORE_SYMBOL (type)), | |
1572 | but this should not be an error (). */ | |
1573 | return; | |
bd5635a1 RP |
1574 | } |
1575 | ||
1576 | switch (type) | |
1577 | { | |
1578 | case N_FUN: | |
1579 | case N_FNAME: | |
2af231b8 JG |
1580 | /* Relocate for dynamic loading */ |
1581 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
b8ec9a79 | 1582 | goto define_a_symbol; |
bd5635a1 | 1583 | |
bd5635a1 RP |
1584 | case N_LBRAC: |
1585 | /* This "symbol" just indicates the start of an inner lexical | |
1586 | context within a function. */ | |
1587 | ||
574dac8e JK |
1588 | #if defined(BLOCK_ADDRESS_ABSOLUTE) |
1589 | /* Relocate for dynamic loading (?). */ | |
9342ecb9 | 1590 | valu += function_start_offset; |
c55e6167 | 1591 | #else |
574dac8e JK |
1592 | if (block_address_function_relative) |
1593 | /* Relocate for Sun ELF acc fn-relative syms. */ | |
1594 | valu += function_start_offset; | |
1595 | else | |
1596 | /* On most machines, the block addresses are relative to the | |
1597 | N_SO, the linker did not relocate them (sigh). */ | |
1598 | valu += last_source_start_addr; | |
bd5635a1 RP |
1599 | #endif |
1600 | ||
a5e6391b | 1601 | #ifdef SUN_FIXED_LBRAC_BUG |
8357834f | 1602 | if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) { |
bd5635a1 | 1603 | /* Patch current LBRAC pc value to match last handy pc value */ |
51b80b00 | 1604 | complain (&lbrac_complaint); |
bd5635a1 RP |
1605 | valu = last_pc_address; |
1606 | } | |
a5e6391b | 1607 | #endif |
7d9884b9 | 1608 | new = push_context (desc, valu); |
bd5635a1 RP |
1609 | break; |
1610 | ||
1611 | case N_RBRAC: | |
1612 | /* This "symbol" just indicates the end of an inner lexical | |
1613 | context that was started with N_LBRAC. */ | |
1614 | ||
574dac8e JK |
1615 | #if defined(BLOCK_ADDRESS_ABSOLUTE) |
1616 | /* Relocate for dynamic loading (?). */ | |
9342ecb9 | 1617 | valu += function_start_offset; |
c55e6167 | 1618 | #else |
574dac8e JK |
1619 | if (block_address_function_relative) |
1620 | /* Relocate for Sun ELF acc fn-relative syms. */ | |
1621 | valu += function_start_offset; | |
1622 | else | |
1623 | /* On most machines, the block addresses are relative to the | |
1624 | N_SO, the linker did not relocate them (sigh). */ | |
1625 | valu += last_source_start_addr; | |
bd5635a1 RP |
1626 | #endif |
1627 | ||
7d9884b9 | 1628 | new = pop_context(); |
bd5635a1 | 1629 | if (desc != new->depth) |
51b80b00 | 1630 | complain (&lbrac_mismatch_complaint, symnum); |
bd5635a1 RP |
1631 | |
1632 | /* Some compilers put the variable decls inside of an | |
1633 | LBRAC/RBRAC block. This macro should be nonzero if this | |
1634 | is true. DESC is N_DESC from the N_RBRAC symbol. | |
0cf9329b PB |
1635 | GCC_P is true if we've detected the GCC_COMPILED_SYMBOL |
1636 | or the GCC2_COMPILED_SYMBOL. */ | |
bd5635a1 RP |
1637 | #if !defined (VARIABLES_INSIDE_BLOCK) |
1638 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 | |
1639 | #endif | |
1640 | ||
1641 | /* Can only use new->locals as local symbols here if we're in | |
1642 | gcc or on a machine that puts them before the lbrack. */ | |
1643 | if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1644 | local_symbols = new->locals; | |
1645 | ||
1646 | /* If this is not the outermost LBRAC...RBRAC pair in the | |
1647 | function, its local symbols preceded it, and are the ones | |
1648 | just recovered from the context stack. Defined the block for them. | |
1649 | ||
1650 | If this is the outermost LBRAC...RBRAC pair, there is no | |
1651 | need to do anything; leave the symbols that preceded it | |
1652 | to be attached to the function's own block. However, if | |
1653 | it is so, we need to indicate that we just moved outside | |
1654 | of the function. */ | |
1655 | if (local_symbols | |
1656 | && (context_stack_depth | |
1657 | > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))) | |
1658 | { | |
1659 | /* FIXME Muzzle a compiler bug that makes end < start. */ | |
1660 | if (new->start_addr > valu) | |
1661 | { | |
51b80b00 | 1662 | complain (&lbrac_rbrac_complaint); |
bd5635a1 RP |
1663 | new->start_addr = valu; |
1664 | } | |
1665 | /* Make a block for the local symbols within. */ | |
1666 | finish_block (0, &local_symbols, new->old_blocks, | |
9342ecb9 | 1667 | new->start_addr, valu, objfile); |
bd5635a1 RP |
1668 | } |
1669 | else | |
1670 | { | |
1671 | within_function = 0; | |
1672 | } | |
1673 | if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1674 | /* Now pop locals of block just finished. */ | |
1675 | local_symbols = new->locals; | |
1676 | break; | |
1677 | ||
9bb30452 | 1678 | case N_FN: |
6150cc73 | 1679 | case N_FN_SEQ: |
9bb30452 | 1680 | /* This kind of symbol indicates the start of an object file. */ |
2af231b8 JG |
1681 | /* Relocate for dynamic loading */ |
1682 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
bd5635a1 RP |
1683 | break; |
1684 | ||
1685 | case N_SO: | |
1686 | /* This type of symbol indicates the start of data | |
1687 | for one source file. | |
1688 | Finish the symbol table of the previous source file | |
1689 | (if any) and start accumulating a new symbol table. */ | |
2af231b8 JG |
1690 | /* Relocate for dynamic loading */ |
1691 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
c55e6167 | 1692 | |
8357834f JK |
1693 | n_opt_found = 0; |
1694 | ||
a5e6391b | 1695 | #ifdef SUN_FIXED_LBRAC_BUG |
bd5635a1 | 1696 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
a5e6391b | 1697 | #endif |
8357834f | 1698 | |
bd5635a1 RP |
1699 | #ifdef PCC_SOL_BROKEN |
1700 | /* pcc bug, occasionally puts out SO for SOL. */ | |
1701 | if (context_stack_depth > 0) | |
1702 | { | |
1703 | start_subfile (name, NULL); | |
1704 | break; | |
1705 | } | |
1706 | #endif | |
1707 | if (last_source_file) | |
7e258d18 PB |
1708 | { |
1709 | /* Check if previous symbol was also an N_SO (with some | |
1710 | sanity checks). If so, that one was actually the directory | |
1711 | name, and the current one is the real file name. | |
1712 | Patch things up. */ | |
6985bc54 | 1713 | if (previous_stab_code == (unsigned char) N_SO) |
7e258d18 | 1714 | { |
3416d90b | 1715 | patch_subfile_names (current_subfile, name); |
c72af089 | 1716 | break; /* Ignore repeated SOs */ |
7e258d18 | 1717 | } |
65ce5df4 | 1718 | end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT); |
3416d90b | 1719 | end_stabs (); |
7e258d18 | 1720 | } |
3416d90b | 1721 | start_stabs (); |
bd5635a1 RP |
1722 | start_symtab (name, NULL, valu); |
1723 | break; | |
1724 | ||
c55e6167 | 1725 | |
bd5635a1 RP |
1726 | case N_SOL: |
1727 | /* This type of symbol indicates the start of data for | |
1728 | a sub-source-file, one whose contents were copied or | |
1729 | included in the compilation of the main source file | |
1730 | (whose name was given in the N_SO symbol.) */ | |
2af231b8 JG |
1731 | /* Relocate for dynamic loading */ |
1732 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
784fd92b | 1733 | start_subfile (name, current_subfile->dirname); |
bd5635a1 RP |
1734 | break; |
1735 | ||
1736 | case N_BINCL: | |
1737 | push_subfile (); | |
1738 | add_new_header_file (name, valu); | |
784fd92b | 1739 | start_subfile (name, current_subfile->dirname); |
bd5635a1 RP |
1740 | break; |
1741 | ||
1742 | case N_EINCL: | |
784fd92b | 1743 | start_subfile (pop_subfile (), current_subfile->dirname); |
bd5635a1 RP |
1744 | break; |
1745 | ||
1746 | case N_EXCL: | |
1747 | add_old_header_file (name, valu); | |
1748 | break; | |
1749 | ||
1750 | case N_SLINE: | |
1751 | /* This type of "symbol" really just records | |
1752 | one line-number -- core-address correspondence. | |
1753 | Enter it in the line list for this symbol table. */ | |
9342ecb9 JG |
1754 | /* Relocate for dynamic loading and for ELF acc fn-relative syms. */ |
1755 | valu += function_start_offset; | |
a5e6391b | 1756 | #ifdef SUN_FIXED_LBRAC_BUG |
bd5635a1 | 1757 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
a5e6391b | 1758 | #endif |
4137c5fc | 1759 | record_line (current_subfile, desc, valu); |
bd5635a1 RP |
1760 | break; |
1761 | ||
1762 | case N_BCOMM: | |
4d57c599 | 1763 | common_block_start (name, objfile); |
bd5635a1 RP |
1764 | break; |
1765 | ||
1766 | case N_ECOMM: | |
4d57c599 JK |
1767 | common_block_end (objfile); |
1768 | break; | |
bd5635a1 | 1769 | |
2af231b8 JG |
1770 | /* The following symbol types need to have the appropriate offset added |
1771 | to their value; then we process symbol definitions in the name. */ | |
1772 | ||
1773 | case N_STSYM: /* Static symbol in data seg */ | |
1774 | case N_LCSYM: /* Static symbol in BSS seg */ | |
1775 | case N_ROSYM: /* Static symbol in Read-only data seg */ | |
4d57c599 JK |
1776 | /* HORRID HACK DEPT. However, it's Sun's furgin' fault. |
1777 | Solaris2's stabs-in-elf makes *most* symbols relative | |
1778 | but leaves a few absolute (at least for Solaris 2.1 and version | |
1779 | 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence. | |
2af231b8 JG |
1780 | .stab "foo:S...",N_STSYM is absolute (ld relocates it) |
1781 | .stab "foo:V...",N_STSYM is relative (section base subtracted). | |
1782 | This leaves us no choice but to search for the 'S' or 'V'... | |
1783 | (or pass the whole section_offsets stuff down ONE MORE function | |
4d57c599 | 1784 | call level, which we really don't want to do). */ |
2af231b8 JG |
1785 | { |
1786 | char *p; | |
1787 | p = strchr (name, ':'); | |
1788 | if (p != 0 && p[1] == 'S') | |
1789 | { | |
4d57c599 JK |
1790 | /* The linker relocated it. There used to be a kludge here |
1791 | to add the text offset, but that will break if we ever | |
1792 | start using the text offset (currently it is always zero). */ | |
2af231b8 JG |
1793 | goto define_a_symbol; |
1794 | } | |
1795 | /* Since it's not the kludge case, re-dispatch to the right handler. */ | |
1796 | switch (type) { | |
1797 | case N_STSYM: goto case_N_STSYM; | |
1798 | case N_LCSYM: goto case_N_LCSYM; | |
1799 | case N_ROSYM: goto case_N_ROSYM; | |
1800 | default: abort(); | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | case_N_STSYM: /* Static symbol in data seg */ | |
c55e6167 | 1805 | case N_DSLINE: /* Source line number, data seg */ |
2af231b8 JG |
1806 | valu += ANOFFSET (section_offsets, SECT_OFF_DATA); |
1807 | goto define_a_symbol; | |
1808 | ||
1809 | case_N_LCSYM: /* Static symbol in BSS seg */ | |
c55e6167 JG |
1810 | case N_BSLINE: /* Source line number, bss seg */ |
1811 | /* N_BROWS: overlaps with N_BSLINE */ | |
2af231b8 JG |
1812 | valu += ANOFFSET (section_offsets, SECT_OFF_BSS); |
1813 | goto define_a_symbol; | |
1814 | ||
1815 | case_N_ROSYM: /* Static symbol in Read-only data seg */ | |
1816 | valu += ANOFFSET (section_offsets, SECT_OFF_RODATA); | |
1817 | goto define_a_symbol; | |
1818 | ||
c55e6167 | 1819 | case N_ENTRY: /* Alternate entry point */ |
2af231b8 JG |
1820 | /* Relocate for dynamic loading */ |
1821 | valu += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1822 | goto define_a_symbol; | |
c55e6167 | 1823 | |
4f470205 JK |
1824 | /* The following symbol types we don't know how to process. Handle |
1825 | them in a "default" way, but complain to people who care. */ | |
1826 | default: | |
1827 | case N_CATCH: /* Exception handler catcher */ | |
1828 | case N_EHDECL: /* Exception handler name */ | |
1829 | case N_PC: /* Global symbol in Pascal */ | |
1830 | case N_M2C: /* Modula-2 compilation unit */ | |
1831 | /* N_MOD2: overlaps with N_EHDECL */ | |
1832 | case N_SCOPE: /* Modula-2 scope information */ | |
1833 | case N_ECOML: /* End common (local name) */ | |
1834 | case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ | |
1835 | case N_NBDATA: | |
1836 | case N_NBBSS: | |
1837 | case N_NBSTS: | |
1838 | case N_NBLCS: | |
5573d7d4 JK |
1839 | complain (&unknown_symtype_complaint, |
1840 | local_hex_string((unsigned long) type)); | |
4f470205 JK |
1841 | /* FALLTHROUGH */ |
1842 | ||
c55e6167 JG |
1843 | /* The following symbol types don't need the address field relocated, |
1844 | since it is either unused, or is absolute. */ | |
2af231b8 | 1845 | define_a_symbol: |
c55e6167 JG |
1846 | case N_GSYM: /* Global variable */ |
1847 | case N_NSYMS: /* Number of symbols (ultrix) */ | |
1848 | case N_NOMAP: /* No map? (ultrix) */ | |
1849 | case N_RSYM: /* Register variable */ | |
1850 | case N_DEFD: /* Modula-2 GNU module dependency */ | |
1851 | case N_SSYM: /* Struct or union element */ | |
1852 | case N_LSYM: /* Local symbol in stack */ | |
1853 | case N_PSYM: /* Parameter variable */ | |
1854 | case N_LENG: /* Length of preceding symbol type */ | |
1855 | if (name) | |
4f470205 | 1856 | { |
b8ec9a79 JK |
1857 | int deftype; |
1858 | char *colon_pos = strchr (name, ':'); | |
1859 | if (colon_pos == NULL) | |
1860 | deftype = '\0'; | |
1861 | else | |
1862 | deftype = colon_pos[1]; | |
1863 | ||
1864 | switch (deftype) | |
4f470205 | 1865 | { |
b8ec9a79 JK |
1866 | case 'f': |
1867 | case 'F': | |
1868 | function_stab_type = type; | |
1869 | ||
3ef0fc8c | 1870 | #ifdef SUN_FIXED_LBRAC_BUG |
b8ec9a79 JK |
1871 | /* The Sun acc compiler, under SunOS4, puts out |
1872 | functions with N_GSYM or N_STSYM. The problem is | |
1873 | that the address of the symbol is no good (for N_GSYM | |
1874 | it doesn't even attept an address; for N_STSYM it | |
1875 | puts out an address but then it gets relocated | |
1876 | relative to the data segment, not the text segment). | |
1877 | Currently we can't fix this up later as we do for | |
1878 | some types of symbol in scan_file_globals. | |
1879 | Fortunately we do have a way of finding the address - | |
1880 | we know that the value in last_pc_address is either | |
1881 | the one we want (if we're dealing with the first | |
1882 | function in an object file), or somewhere in the | |
1883 | previous function. This means that we can use the | |
1884 | minimal symbol table to get the address. */ | |
1885 | ||
8adcfb97 JK |
1886 | /* On solaris up to 2.2, the N_FUN stab gets relocated. |
1887 | On Solaris 2.3, ld no longer relocates stabs (which | |
1888 | is good), and the N_FUN's value is now always zero. | |
5573d7d4 JK |
1889 | The following code can't deal with this, because |
1890 | last_pc_address depends on getting the address from a | |
1891 | N_SLINE or some such and in Solaris those are function | |
1892 | relative. Best fix is probably to create a Ttext.text symbol | |
1893 | and handle this like Ddata.data and so on. */ | |
8adcfb97 | 1894 | |
5573d7d4 | 1895 | if (type == N_GSYM || type == N_STSYM) |
b8ec9a79 JK |
1896 | { |
1897 | struct minimal_symbol *m; | |
1898 | int l = colon_pos - name; | |
1899 | ||
1900 | m = lookup_minimal_symbol_by_pc (last_pc_address); | |
1901 | if (m && STREQN (SYMBOL_NAME (m), name, l)) | |
1902 | /* last_pc_address was in this function */ | |
1903 | valu = SYMBOL_VALUE (m); | |
3c7d3064 JK |
1904 | else if (m && STREQN (SYMBOL_NAME (m+1), name, l)) |
1905 | /* last_pc_address was in last function */ | |
1906 | valu = SYMBOL_VALUE (m+1); | |
b8ec9a79 | 1907 | else |
3c7d3064 JK |
1908 | /* Not found - use last_pc_address (for finish_block) */ |
1909 | valu = last_pc_address; | |
b8ec9a79 JK |
1910 | } |
1911 | ||
b8ec9a79 JK |
1912 | last_pc_address = valu; /* Save for SunOS bug circumcision */ |
1913 | #endif | |
1914 | ||
1915 | if (block_address_function_relative) | |
1916 | /* For Solaris 2.0 compilers, the block addresses and | |
1917 | N_SLINE's are relative to the start of the | |
1918 | function. On normal systems, and when using gcc on | |
1919 | Solaris 2.0, these addresses are just absolute, or | |
1920 | relative to the N_SO, depending on | |
1921 | BLOCK_ADDRESS_ABSOLUTE. */ | |
1922 | function_start_offset = valu; | |
1923 | ||
1924 | within_function = 1; | |
1925 | if (context_stack_depth > 0) | |
1926 | { | |
1927 | new = pop_context (); | |
1928 | /* Make a block for the local symbols within. */ | |
1929 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1930 | new->start_addr, valu, objfile); | |
1931 | } | |
1932 | /* Stack must be empty now. */ | |
1933 | if (context_stack_depth != 0) | |
1934 | complain (&lbrac_unmatched_complaint, symnum); | |
1935 | ||
1936 | new = push_context (0, valu); | |
1937 | new->name = define_symbol (valu, name, desc, type, objfile); | |
1938 | break; | |
1939 | ||
1940 | default: | |
1941 | define_symbol (valu, name, desc, type, objfile); | |
1942 | break; | |
4f470205 JK |
1943 | } |
1944 | } | |
bd5635a1 RP |
1945 | break; |
1946 | ||
ec8ceca3 JG |
1947 | /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it |
1948 | for a bunch of other flags, too. Someday we may parse their | |
1949 | flags; for now we ignore theirs and hope they'll ignore ours. */ | |
1950 | case N_OPT: /* Solaris 2: Compiler options */ | |
1951 | if (name) | |
1952 | { | |
2e4964ad | 1953 | if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL)) |
3416d90b | 1954 | { |
1aed6766 | 1955 | processing_gcc_compilation = 2; |
3416d90b | 1956 | #if 1 /* Works, but is experimental. -fnf */ |
1aed6766 | 1957 | if (AUTO_DEMANGLING) |
3416d90b FF |
1958 | { |
1959 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1960 | } | |
1961 | #endif | |
1962 | } | |
8357834f JK |
1963 | else |
1964 | n_opt_found = 1; | |
ec8ceca3 JG |
1965 | } |
1966 | break; | |
1967 | ||
bcbf9559 JG |
1968 | /* The following symbol types can be ignored. */ |
1969 | case N_OBJ: /* Solaris 2: Object file dir and name */ | |
bcbf9559 JG |
1970 | /* N_UNDF: Solaris 2: file separator mark */ |
1971 | /* N_UNDF: -- we will never encounter it, since we only process one | |
1972 | file's symbols at once. */ | |
4c7c6bab JG |
1973 | case N_ENDM: /* Solaris 2: End of module */ |
1974 | case N_MAIN: /* Name of main routine. */ | |
9342ecb9 | 1975 | break; |
bd5635a1 | 1976 | } |
7e258d18 PB |
1977 | |
1978 | previous_stab_code = type; | |
bd5635a1 RP |
1979 | } |
1980 | \f | |
965a5c32 SS |
1981 | /* FIXME: The only difference between this and elfstab_build_psymtabs is |
1982 | the call to install_minimal_symbols for elf. If the differences are | |
1983 | really that small, the code should be shared. */ | |
1984 | ||
b5b186a2 SS |
1985 | /* Scan and build partial symbols for an coff symbol file. |
1986 | The coff file has already been processed to get its minimal symbols. | |
1987 | ||
1988 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read | |
1989 | rolled into one. | |
1990 | ||
1991 | OBJFILE is the object file we are reading symbols from. | |
1992 | ADDR is the address relative to which the symbols are (e.g. | |
1993 | the base address of the text segment). | |
1994 | MAINLINE is true if we are reading the main symbol | |
1995 | table (as opposed to a shared lib or dynamically loaded file). | |
1996 | STABOFFSET and STABSIZE define the location in OBJFILE where the .stab | |
1997 | section exists. | |
1998 | STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the | |
1999 | .stabstr section exists. | |
2000 | ||
2001 | This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, | |
2002 | adjusted for coff details. */ | |
2003 | ||
2004 | void | |
2005 | coffstab_build_psymtabs (objfile, section_offsets, mainline, | |
2006 | staboffset, stabsize, | |
2007 | stabstroffset, stabstrsize) | |
2008 | struct objfile *objfile; | |
2009 | struct section_offsets *section_offsets; | |
2010 | int mainline; | |
2011 | file_ptr staboffset; | |
2012 | unsigned int stabsize; | |
2013 | file_ptr stabstroffset; | |
2014 | unsigned int stabstrsize; | |
2015 | { | |
2016 | int val; | |
2017 | bfd *sym_bfd = objfile->obfd; | |
2018 | char *name = bfd_get_filename (sym_bfd); | |
2019 | struct dbx_symfile_info *info; | |
2020 | ||
2021 | /* There is already a dbx_symfile_info allocated by our caller. | |
2022 | It might even contain some info from the coff symtab to help us. */ | |
965a5c32 | 2023 | info = (struct dbx_symfile_info *) objfile->sym_stab_info; |
b5b186a2 SS |
2024 | |
2025 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); | |
2026 | if (!DBX_TEXT_SECT (objfile)) | |
2027 | error ("Can't find .text section in symbol file"); | |
2028 | ||
2029 | #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ | |
2030 | DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE; | |
2031 | DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); | |
2032 | DBX_STRINGTAB_SIZE (objfile) = stabstrsize; | |
2033 | DBX_SYMTAB_OFFSET (objfile) = staboffset; | |
2034 | ||
2035 | if (stabstrsize > bfd_get_size (sym_bfd)) | |
2036 | error ("ridiculous string table size: %d bytes", stabstrsize); | |
2037 | DBX_STRINGTAB (objfile) = (char *) | |
2038 | obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1); | |
2039 | ||
2040 | /* Now read in the string table in one big gulp. */ | |
2041 | ||
2042 | val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); | |
2043 | if (val < 0) | |
2044 | perror_with_name (name); | |
2045 | val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd); | |
2046 | if (val != stabstrsize) | |
2047 | perror_with_name (name); | |
2048 | ||
2049 | stabsread_new_init (); | |
2050 | buildsym_new_init (); | |
2051 | free_header_files (); | |
2052 | init_header_files (); | |
2053 | ||
2054 | processing_acc_compilation = 1; | |
2055 | ||
2056 | /* In a coff file, we've already installed the minimal symbols that came | |
2057 | from the coff (non-stab) symbol table, so always act like an | |
2058 | incremental load here. */ | |
2059 | dbx_symfile_read (objfile, section_offsets, 0); | |
2060 | } | |
2061 | \f | |
9342ecb9 JG |
2062 | /* Scan and build partial symbols for an ELF symbol file. |
2063 | This ELF file has already been processed to get its minimal symbols, | |
2064 | and any DWARF symbols that were in it. | |
2065 | ||
2066 | This routine is the equivalent of dbx_symfile_init and dbx_symfile_read | |
2067 | rolled into one. | |
2068 | ||
2069 | OBJFILE is the object file we are reading symbols from. | |
2070 | ADDR is the address relative to which the symbols are (e.g. | |
2071 | the base address of the text segment). | |
2072 | MAINLINE is true if we are reading the main symbol | |
2073 | table (as opposed to a shared lib or dynamically loaded file). | |
2074 | STABOFFSET and STABSIZE define the location in OBJFILE where the .stab | |
2075 | section exists. | |
2076 | STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the | |
2077 | .stabstr section exists. | |
2078 | ||
2079 | This routine is mostly copied from dbx_symfile_init and dbx_symfile_read, | |
2080 | adjusted for elf details. */ | |
2081 | ||
2082 | void | |
1aed6766 | 2083 | elfstab_build_psymtabs (objfile, section_offsets, mainline, |
9342ecb9 | 2084 | staboffset, stabsize, |
1aed6766 SG |
2085 | stabstroffset, stabstrsize) |
2086 | struct objfile *objfile; | |
2087 | struct section_offsets *section_offsets; | |
2088 | int mainline; | |
51b80b00 | 2089 | file_ptr staboffset; |
1aed6766 | 2090 | unsigned int stabsize; |
51b80b00 | 2091 | file_ptr stabstroffset; |
1aed6766 | 2092 | unsigned int stabstrsize; |
9342ecb9 JG |
2093 | { |
2094 | int val; | |
2095 | bfd *sym_bfd = objfile->obfd; | |
2096 | char *name = bfd_get_filename (sym_bfd); | |
2097 | struct dbx_symfile_info *info; | |
2098 | ||
2af231b8 JG |
2099 | /* There is already a dbx_symfile_info allocated by our caller. |
2100 | It might even contain some info from the ELF symtab to help us. */ | |
965a5c32 | 2101 | info = (struct dbx_symfile_info *) objfile->sym_stab_info; |
9342ecb9 JG |
2102 | |
2103 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); | |
2104 | if (!DBX_TEXT_SECT (objfile)) | |
2105 | error ("Can't find .text section in symbol file"); | |
2106 | ||
2107 | #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */ | |
2108 | DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE; | |
2109 | DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile); | |
2110 | DBX_STRINGTAB_SIZE (objfile) = stabstrsize; | |
2111 | DBX_SYMTAB_OFFSET (objfile) = staboffset; | |
2112 | ||
996ccb30 | 2113 | if (stabstrsize > bfd_get_size (sym_bfd)) |
9342ecb9 JG |
2114 | error ("ridiculous string table size: %d bytes", stabstrsize); |
2115 | DBX_STRINGTAB (objfile) = (char *) | |
2116 | obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1); | |
2117 | ||
2118 | /* Now read in the string table in one big gulp. */ | |
2119 | ||
2c7ab4ca | 2120 | val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET); |
9342ecb9 JG |
2121 | if (val < 0) |
2122 | perror_with_name (name); | |
2123 | val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd); | |
2124 | if (val != stabstrsize) | |
2125 | perror_with_name (name); | |
2126 | ||
3416d90b | 2127 | stabsread_new_init (); |
9342ecb9 JG |
2128 | buildsym_new_init (); |
2129 | free_header_files (); | |
2130 | init_header_files (); | |
2131 | install_minimal_symbols (objfile); | |
2132 | ||
2133 | processing_acc_compilation = 1; | |
2134 | ||
2135 | /* In an elf file, we've already installed the minimal symbols that came | |
2136 | from the elf (non-stab) symbol table, so always act like an | |
2137 | incremental load here. */ | |
2af231b8 JG |
2138 | dbx_symfile_read (objfile, section_offsets, 0); |
2139 | } | |
2140 | \f | |
040b9597 RP |
2141 | /* Scan and build partial symbols for a PA symbol file. |
2142 | This PA file has already been processed to get its minimal symbols. | |
2143 | ||
2144 | OBJFILE is the object file we are reading symbols from. | |
2145 | ADDR is the address relative to which the symbols are (e.g. | |
2146 | the base address of the text segment). | |
2147 | MAINLINE is true if we are reading the main symbol | |
2148 | table (as opposed to a shared lib or dynamically loaded file). | |
2149 | ||
2150 | */ | |
2151 | ||
2152 | void | |
2153 | pastab_build_psymtabs (objfile, section_offsets, mainline) | |
2154 | struct objfile *objfile; | |
2155 | struct section_offsets *section_offsets; | |
2156 | int mainline; | |
2157 | { | |
2158 | free_header_files (); | |
2159 | init_header_files (); | |
2160 | ||
2161 | /* In a PA file, we've already installed the minimal symbols that came | |
2162 | from the PA (non-stab) symbol table, so always act like an | |
2163 | incremental load here. */ | |
2164 | ||
2165 | dbx_symfile_read (objfile, section_offsets, mainline); | |
2166 | } | |
2167 | \f | |
2af231b8 JG |
2168 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
2169 | of how to represent it for fast symbol reading. */ | |
2170 | ||
040b9597 | 2171 | static struct section_offsets * |
2af231b8 JG |
2172 | dbx_symfile_offsets (objfile, addr) |
2173 | struct objfile *objfile; | |
2174 | CORE_ADDR addr; | |
2175 | { | |
2176 | struct section_offsets *section_offsets; | |
2177 | int i; | |
4d57c599 JK |
2178 | |
2179 | objfile->num_sections = SECT_OFF_MAX; | |
2af231b8 JG |
2180 | section_offsets = (struct section_offsets *) |
2181 | obstack_alloc (&objfile -> psymbol_obstack, | |
4d57c599 JK |
2182 | sizeof (struct section_offsets) |
2183 | + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); | |
2af231b8 JG |
2184 | |
2185 | for (i = 0; i < SECT_OFF_MAX; i++) | |
2186 | ANOFFSET (section_offsets, i) = addr; | |
2187 | ||
2188 | return section_offsets; | |
9342ecb9 JG |
2189 | } |
2190 | \f | |
bd5635a1 | 2191 | /* Register our willingness to decode symbols for SunOS and a.out and |
05c81f45 | 2192 | NetBSD and b.out files handled by BFD... */ |
80d68b1d FF |
2193 | static struct sym_fns sunos_sym_fns = |
2194 | { | |
2195 | "sunOs", /* sym_name: name or name prefix of BFD target type */ | |
2196 | 6, /* sym_namelen: number of significant sym_name chars */ | |
2197 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
2198 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2199 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2200 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
2af231b8 | 2201 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
80d68b1d FF |
2202 | NULL /* next: pointer to next struct sym_fns */ |
2203 | }; | |
bd5635a1 | 2204 | |
80d68b1d FF |
2205 | static struct sym_fns aout_sym_fns = |
2206 | { | |
2207 | "a.out", /* sym_name: name or name prefix of BFD target type */ | |
2208 | 5, /* sym_namelen: number of significant sym_name chars */ | |
2209 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
2210 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2211 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2212 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
2af231b8 | 2213 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
80d68b1d FF |
2214 | NULL /* next: pointer to next struct sym_fns */ |
2215 | }; | |
bd5635a1 | 2216 | |
80d68b1d FF |
2217 | static struct sym_fns bout_sym_fns = |
2218 | { | |
2219 | "b.out", /* sym_name: name or name prefix of BFD target type */ | |
2220 | 5, /* sym_namelen: number of significant sym_name chars */ | |
2221 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
2222 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2223 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2224 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
2af231b8 | 2225 | dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */ |
80d68b1d FF |
2226 | NULL /* next: pointer to next struct sym_fns */ |
2227 | }; | |
bd5635a1 RP |
2228 | |
2229 | void | |
2230 | _initialize_dbxread () | |
2231 | { | |
2232 | add_symtab_fns(&sunos_sym_fns); | |
2233 | add_symtab_fns(&aout_sym_fns); | |
2234 | add_symtab_fns(&bout_sym_fns); | |
bd5635a1 | 2235 | } |