Commit | Line | Data |
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bd5635a1 | 1 | /* Read dbx symbol tables and convert to internal format, for GDB. |
c55e6167 | 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
c3a21801 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
c3a21801 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
c3a21801 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
c3a21801 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
9404978d MT |
19 | |
20 | /* This module provides three functions: dbx_symfile_init, | |
21 | which initializes to read a symbol file; dbx_new_init, which | |
22 | discards existing cached information when all symbols are being | |
23 | discarded; and dbx_symfile_read, which reads a symbol table | |
24 | from a file. | |
25 | ||
26 | dbx_symfile_read only does the minimum work necessary for letting the | |
27 | user "name" things symbolically; it does not read the entire symtab. | |
28 | Instead, it reads the external and static symbols and puts them in partial | |
29 | symbol tables. When more extensive information is requested of a | |
30 | file, the corresponding partial symbol table is mutated into a full | |
31 | fledged symbol table by going back and reading the symbols | |
32 | for real. dbx_psymtab_to_symtab() is the function that does this */ | |
bd5635a1 | 33 | |
bd5635a1 | 34 | #include "defs.h" |
318bf84f | 35 | #include <string.h> |
bd5635a1 RP |
36 | |
37 | #ifdef USG | |
38 | #include <sys/types.h> | |
39 | #include <fcntl.h> | |
40 | #define L_SET 0 | |
41 | #define L_INCR 1 | |
42 | #endif | |
43 | ||
afe4ca15 JG |
44 | #include <obstack.h> |
45 | #include <sys/param.h> | |
021959e2 | 46 | #ifndef NO_SYS_FILE |
afe4ca15 | 47 | #include <sys/file.h> |
021959e2 | 48 | #endif |
afe4ca15 | 49 | #include <sys/stat.h> |
bd5635a1 | 50 | #include <ctype.h> |
afe4ca15 JG |
51 | #include "symtab.h" |
52 | #include "breakpoint.h" | |
53 | #include "command.h" | |
54 | #include "target.h" | |
55 | #include "gdbcore.h" /* for bfd stuff */ | |
56 | #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */ | |
57 | #include "symfile.h" | |
c0302457 | 58 | #include "buildsym.h" |
afe4ca15 | 59 | |
7e258d18 PB |
60 | #include "aout/aout64.h" |
61 | #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ | |
bd5635a1 | 62 | |
c0302457 JG |
63 | /* Information is passed among various dbxread routines for accessing |
64 | symbol files. A pointer to this structure is kept in the sym_private | |
65 | field of the struct sym_fns passed in by symfile.h. */ | |
66 | ||
bd5635a1 RP |
67 | struct dbx_symfile_info { |
68 | asection *text_sect; /* Text section accessor */ | |
69 | int symcount; /* How many symbols are there in the file */ | |
70 | char *stringtab; /* The actual string table */ | |
71 | int stringtab_size; /* Its size */ | |
72 | off_t symtab_offset; /* Offset in file to symbol table */ | |
bd5635a1 RP |
73 | }; |
74 | ||
c0302457 | 75 | |
4a35d6e9 FF |
76 | /* Each partial symbol table entry contains a pointer to private data for the |
77 | read_symtab() function to use when expanding a partial symbol table entry | |
78 | to a full symbol table entry. | |
79 | ||
80 | For dbxread this structure contains the offset within the file symbol table | |
81 | of first local symbol for this file, and length (in bytes) of the section | |
82 | of the symbol table devoted to this file's symbols (actually, the section | |
83 | bracketed may contain more than just this file's symbols). If ldsymlen is | |
84 | 0, the only reason for this thing's existence is the dependency list. | |
85 | Nothing else will happen when it is read in. */ | |
86 | ||
87 | #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) | |
88 | #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) | |
89 | ||
90 | struct symloc { | |
91 | int ldsymoff; | |
92 | int ldsymlen; | |
93 | }; | |
94 | ||
bd5635a1 RP |
95 | /* Macro to determine which symbols to ignore when reading the first symbol |
96 | of a file. Some machines override this definition. */ | |
97 | #ifndef IGNORE_SYMBOL | |
98 | /* This code is used on Ultrix systems. Ignore it */ | |
99 | #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS) | |
100 | #endif | |
101 | ||
102 | /* Macro for name of symbol to indicate a file compiled with gcc. */ | |
103 | #ifndef GCC_COMPILED_FLAG_SYMBOL | |
104 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." | |
105 | #endif | |
106 | ||
0cf9329b PB |
107 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
108 | #ifndef GCC2_COMPILED_FLAG_SYMBOL | |
109 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." | |
110 | #endif | |
111 | ||
bd5635a1 RP |
112 | /* Define this as 1 if a pcc declaration of a char or short argument |
113 | gives the correct address. Otherwise assume pcc gives the | |
114 | address of the corresponding int, which is not the same on a | |
115 | big-endian machine. */ | |
116 | ||
117 | #ifndef BELIEVE_PCC_PROMOTION | |
118 | #define BELIEVE_PCC_PROMOTION 0 | |
119 | #endif | |
c0302457 | 120 | |
bd5635a1 RP |
121 | /* Nonzero means give verbose info on gdb action. From main.c. */ |
122 | extern int info_verbose; | |
123 | ||
7d9884b9 | 124 | /* The BFD for this file -- implicit parameter to next_symbol_text. */ |
bd5635a1 | 125 | |
c0302457 | 126 | static bfd *symfile_bfd; |
bd5635a1 | 127 | |
7d9884b9 JG |
128 | /* The objfile for this file -- only good in process_one_symbol(). */ |
129 | ||
130 | static struct objfile *our_objfile; | |
131 | ||
bd5635a1 RP |
132 | /* String table for the main symbol file. It is kept in memory |
133 | permanently, to speed up symbol reading. Other files' symbol tables | |
134 | are read in on demand. FIXME, this should be cleaner. */ | |
135 | ||
136 | static char *symfile_string_table; | |
137 | static int symfile_string_table_size; | |
138 | ||
afe4ca15 JG |
139 | /* The size of each symbol in the symbol file (in external form). |
140 | This is set by dbx_symfile_read when building psymtabs, and by | |
141 | dbx_psymtab_to_symtab when building symtabs. */ | |
142 | ||
143 | static unsigned symbol_size; | |
144 | ||
bd5635a1 RP |
145 | /* Complaints about the symbols we have encountered. */ |
146 | ||
bd5635a1 RP |
147 | struct complaint lbrac_complaint = |
148 | {"bad block start address patched", 0, 0}; | |
149 | ||
bd5635a1 RP |
150 | struct complaint string_table_offset_complaint = |
151 | {"bad string table offset in symbol %d", 0, 0}; | |
152 | ||
153 | struct complaint unknown_symtype_complaint = | |
0c4d2cc2 | 154 | {"unknown symbol type %s", 0, 0}; |
bd5635a1 RP |
155 | |
156 | struct complaint lbrac_rbrac_complaint = | |
157 | {"block start larger than block end", 0, 0}; | |
7d9884b9 JG |
158 | |
159 | struct complaint lbrac_unmatched_complaint = | |
160 | {"unmatched N_LBRAC before symtab pos %d", 0, 0}; | |
161 | ||
162 | struct complaint lbrac_mismatch_complaint = | |
163 | {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0}; | |
bd5635a1 | 164 | \f |
bd5635a1 RP |
165 | /* During initial symbol readin, we need to have a structure to keep |
166 | track of which psymtabs have which bincls in them. This structure | |
167 | is used during readin to setup the list of dependencies within each | |
168 | partial symbol table. */ | |
169 | ||
170 | struct header_file_location | |
171 | { | |
172 | char *name; /* Name of header file */ | |
173 | int instance; /* See above */ | |
174 | struct partial_symtab *pst; /* Partial symtab that has the | |
175 | BINCL/EINCL defs for this file */ | |
176 | }; | |
177 | ||
178 | /* The actual list and controling variables */ | |
179 | static struct header_file_location *bincl_list, *next_bincl; | |
180 | static int bincls_allocated; | |
181 | ||
021959e2 JG |
182 | /* Local function prototypes */ |
183 | ||
184 | static void | |
185 | free_and_init_header_files PARAMS ((void)); | |
186 | ||
187 | static struct pending * | |
188 | copy_pending PARAMS ((struct pending *, int, struct pending *)); | |
189 | ||
190 | static struct symtab * | |
191 | read_ofile_symtab PARAMS ((struct objfile *, char *, unsigned int, int, int, | |
192 | CORE_ADDR, int, int)); | |
193 | ||
194 | static void | |
195 | dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
196 | ||
197 | static void | |
198 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *, char *, int, int)); | |
199 | ||
200 | static void | |
201 | read_dbx_symtab PARAMS ((CORE_ADDR, struct objfile *, char *, long, int, | |
202 | CORE_ADDR, int)); | |
203 | ||
204 | static void | |
205 | free_bincl_list PARAMS ((struct objfile *)); | |
206 | ||
207 | static struct partial_symtab * | |
208 | find_corresponding_bincl_psymtab PARAMS ((char *, int)); | |
209 | ||
210 | static void | |
211 | add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int)); | |
212 | ||
213 | static void | |
214 | init_bincl_list PARAMS ((int, struct objfile *)); | |
215 | ||
216 | static void | |
217 | init_psymbol_list PARAMS ((int, struct objfile *)); | |
218 | ||
219 | static char * | |
220 | dbx_next_symbol_text PARAMS ((void)); | |
221 | ||
222 | static void | |
223 | fill_symbuf PARAMS ((bfd *)); | |
224 | ||
225 | static void | |
226 | dbx_symfile_init PARAMS ((struct sym_fns *)); | |
227 | ||
228 | static void | |
229 | dbx_new_init PARAMS ((void)); | |
230 | ||
231 | static void | |
232 | dbx_symfile_read PARAMS ((struct sym_fns *, CORE_ADDR, int)); | |
233 | ||
234 | static void | |
235 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); | |
236 | ||
237 | static void | |
238 | add_new_header_file PARAMS ((char *, int)); | |
239 | ||
240 | static void | |
241 | add_old_header_file PARAMS ((char *, int)); | |
242 | ||
243 | static void | |
244 | add_this_object_header_file PARAMS ((int)); | |
245 | ||
bd5635a1 RP |
246 | /* Free up old header file tables, and allocate new ones. |
247 | We're reading a new symbol file now. */ | |
248 | ||
021959e2 | 249 | static void |
bd5635a1 RP |
250 | free_and_init_header_files () |
251 | { | |
252 | register int i; | |
253 | for (i = 0; i < n_header_files; i++) | |
254 | free (header_files[i].name); | |
255 | if (header_files) /* First time null */ | |
256 | free (header_files); | |
257 | if (this_object_header_files) /* First time null */ | |
258 | free (this_object_header_files); | |
259 | ||
260 | n_allocated_header_files = 10; | |
261 | header_files = (struct header_file *) xmalloc (10 * sizeof (struct header_file)); | |
262 | n_header_files = 0; | |
263 | ||
264 | n_allocated_this_object_header_files = 10; | |
265 | this_object_header_files = (int *) xmalloc (10 * sizeof (int)); | |
266 | } | |
267 | ||
bd5635a1 RP |
268 | /* Add header file number I for this object file |
269 | at the next successive FILENUM. */ | |
270 | ||
271 | static void | |
272 | add_this_object_header_file (i) | |
273 | int i; | |
274 | { | |
275 | if (n_this_object_header_files == n_allocated_this_object_header_files) | |
276 | { | |
277 | n_allocated_this_object_header_files *= 2; | |
278 | this_object_header_files | |
021959e2 | 279 | = (int *) xrealloc ((char *) this_object_header_files, |
bd5635a1 RP |
280 | n_allocated_this_object_header_files * sizeof (int)); |
281 | } | |
282 | ||
283 | this_object_header_files[n_this_object_header_files++] = i; | |
284 | } | |
285 | ||
286 | /* Add to this file an "old" header file, one already seen in | |
287 | a previous object file. NAME is the header file's name. | |
288 | INSTANCE is its instance code, to select among multiple | |
289 | symbol tables for the same header file. */ | |
290 | ||
291 | static void | |
292 | add_old_header_file (name, instance) | |
293 | char *name; | |
294 | int instance; | |
295 | { | |
296 | register struct header_file *p = header_files; | |
297 | register int i; | |
298 | ||
299 | for (i = 0; i < n_header_files; i++) | |
300 | if (!strcmp (p[i].name, name) && instance == p[i].instance) | |
301 | { | |
302 | add_this_object_header_file (i); | |
303 | return; | |
304 | } | |
305 | error ("Invalid symbol data: \"repeated\" header file that hasn't been seen before, at symtab pos %d.", | |
306 | symnum); | |
307 | } | |
308 | ||
309 | /* Add to this file a "new" header file: definitions for its types follow. | |
310 | NAME is the header file's name. | |
311 | Most often this happens only once for each distinct header file, | |
312 | but not necessarily. If it happens more than once, INSTANCE has | |
313 | a different value each time, and references to the header file | |
314 | use INSTANCE values to select among them. | |
315 | ||
316 | dbx output contains "begin" and "end" markers for each new header file, | |
317 | but at this level we just need to know which files there have been; | |
318 | so we record the file when its "begin" is seen and ignore the "end". */ | |
319 | ||
320 | static void | |
321 | add_new_header_file (name, instance) | |
322 | char *name; | |
323 | int instance; | |
324 | { | |
325 | register int i; | |
326 | header_file_prev_index = -1; | |
327 | ||
328 | /* Make sure there is room for one more header file. */ | |
329 | ||
330 | if (n_header_files == n_allocated_header_files) | |
331 | { | |
332 | n_allocated_header_files *= 2; | |
333 | header_files = (struct header_file *) | |
021959e2 JG |
334 | xrealloc ((char *) header_files, |
335 | (n_allocated_header_files * sizeof (struct header_file))); | |
bd5635a1 RP |
336 | } |
337 | ||
338 | /* Create an entry for this header file. */ | |
339 | ||
340 | i = n_header_files++; | |
341 | header_files[i].name = savestring (name, strlen(name)); | |
342 | header_files[i].instance = instance; | |
343 | header_files[i].length = 10; | |
344 | header_files[i].vector | |
345 | = (struct type **) xmalloc (10 * sizeof (struct type *)); | |
346 | bzero (header_files[i].vector, 10 * sizeof (struct type *)); | |
347 | ||
348 | add_this_object_header_file (i); | |
349 | } | |
350 | ||
bd5635a1 RP |
351 | #if 0 |
352 | static struct type ** | |
353 | explicit_lookup_type (real_filenum, index) | |
354 | int real_filenum, index; | |
355 | { | |
356 | register struct header_file *f = &header_files[real_filenum]; | |
357 | ||
358 | if (index >= f->length) | |
359 | { | |
360 | f->length *= 2; | |
361 | f->vector = (struct type **) | |
362 | xrealloc (f->vector, f->length * sizeof (struct type *)); | |
363 | bzero (&f->vector[f->length / 2], | |
364 | f->length * sizeof (struct type *) / 2); | |
365 | } | |
366 | return &f->vector[index]; | |
367 | } | |
368 | #endif | |
369 | \f | |
9bba3334 | 370 | static void |
021959e2 | 371 | record_minimal_symbol (name, address, type, objfile) |
bd5635a1 RP |
372 | char *name; |
373 | CORE_ADDR address; | |
374 | int type; | |
021959e2 | 375 | struct objfile *objfile; |
bd5635a1 | 376 | { |
021959e2 | 377 | enum minimal_symbol_type ms_type; |
0c4d2cc2 JG |
378 | |
379 | switch (type &~ N_EXT) { | |
021959e2 JG |
380 | case N_TEXT: ms_type = mst_text; break; |
381 | case N_DATA: ms_type = mst_data; break; | |
382 | case N_BSS: ms_type = mst_bss; break; | |
383 | case N_ABS: ms_type = mst_abs; break; | |
0c4d2cc2 | 384 | #ifdef N_SETV |
021959e2 | 385 | case N_SETV: ms_type = mst_data; break; |
0c4d2cc2 | 386 | #endif |
021959e2 | 387 | default: ms_type = mst_unknown; break; |
0c4d2cc2 | 388 | } |
bd5635a1 | 389 | |
021959e2 JG |
390 | prim_record_minimal_symbol (obsavestring (name, strlen (name), &objfile -> symbol_obstack), |
391 | address, ms_type); | |
bd5635a1 RP |
392 | } |
393 | \f | |
394 | /* Scan and build partial symbols for a symbol file. | |
395 | We have been initialized by a call to dbx_symfile_init, which | |
396 | put all the relevant info into a "struct dbx_symfile_info" | |
397 | hung off the struct sym_fns SF. | |
398 | ||
399 | ADDR is the address relative to which the symbols in it are (e.g. | |
400 | the base address of the text segment). | |
401 | MAINLINE is true if we are reading the main symbol | |
402 | table (as opposed to a shared lib or dynamically loaded file). */ | |
403 | ||
9bba3334 | 404 | static void |
bd5635a1 RP |
405 | dbx_symfile_read (sf, addr, mainline) |
406 | struct sym_fns *sf; | |
407 | CORE_ADDR addr; | |
408 | int mainline; /* FIXME comments above */ | |
409 | { | |
410 | struct dbx_symfile_info *info = (struct dbx_symfile_info *) (sf->sym_private); | |
7d9884b9 | 411 | bfd *sym_bfd = sf->objfile->obfd; |
bd5635a1 | 412 | int val; |
bd5635a1 | 413 | |
7d9884b9 | 414 | val = bfd_seek (sf->objfile->obfd, info->symtab_offset, L_SET); |
bd5635a1 | 415 | if (val < 0) |
7d9884b9 | 416 | perror_with_name (sf->objfile->name); |
bd5635a1 RP |
417 | |
418 | /* If mainline, set global string table pointers, and reinitialize global | |
419 | partial symbol list. */ | |
420 | if (mainline) { | |
421 | symfile_string_table = info->stringtab; | |
422 | symfile_string_table_size = info->stringtab_size; | |
bd5635a1 RP |
423 | } |
424 | ||
66eeea27 | 425 | /* If we are reinitializing, or if we have never loaded syms yet, init */ |
021959e2 JG |
426 | if (mainline || sf->objfile->global_psymbols.size == 0 || sf->objfile->static_psymbols.size == 0) |
427 | init_psymbol_list (info->symcount, sf->objfile); | |
66eeea27 | 428 | |
afe4ca15 JG |
429 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
430 | symbol_size = obj_symbol_entry_size (sym_bfd); | |
431 | ||
bd5635a1 RP |
432 | pending_blocks = 0; |
433 | make_cleanup (really_free_pendings, 0); | |
434 | ||
021959e2 JG |
435 | init_minimal_symbol_collection (); |
436 | make_cleanup (discard_minimal_symbols, 0); | |
bd5635a1 RP |
437 | |
438 | /* Now that the symbol table data of the executable file are all in core, | |
439 | process them and define symbols accordingly. */ | |
440 | ||
7d9884b9 JG |
441 | read_dbx_symtab (addr - bfd_section_vma (sym_bfd, info->text_sect), /*offset*/ |
442 | sf->objfile, info->stringtab, info->stringtab_size, | |
bd5635a1 RP |
443 | info->symcount, |
444 | bfd_section_vma (sym_bfd, info->text_sect), | |
445 | bfd_section_size (sym_bfd, info->text_sect)); | |
446 | ||
021959e2 JG |
447 | /* Install any minimal symbols that have been collected as the current |
448 | minimal symbols for this objfile. */ | |
bd5635a1 | 449 | |
021959e2 | 450 | install_minimal_symbols (sf -> objfile); |
bd5635a1 RP |
451 | |
452 | /* Free up any memory we allocated for ourselves. */ | |
453 | ||
454 | if (!mainline) { | |
318bf84f | 455 | mfree (sf->objfile->md, info->stringtab); /* Stringtab is only saved for mainline */ |
bd5635a1 | 456 | } |
318bf84f | 457 | mfree (sf->objfile->md, info); |
021959e2 | 458 | sf->sym_private = NULL; /* Zap pointer to our (now gone) info struct */ |
bd5635a1 | 459 | |
021959e2 | 460 | if (!have_partial_symbols ()) { |
9404978d MT |
461 | wrap_here (""); |
462 | printf_filtered ("(no debugging symbols found)..."); | |
463 | wrap_here (""); | |
464 | } | |
bd5635a1 RP |
465 | } |
466 | ||
9404978d MT |
467 | /* Initialize anything that needs initializing when a completely new |
468 | symbol file is specified (not just adding some symbols from another | |
469 | file, e.g. a shared library). */ | |
bd5635a1 | 470 | |
9bba3334 | 471 | static void |
9404978d | 472 | dbx_new_init () |
bd5635a1 | 473 | { |
c0302457 | 474 | buildsym_new_init (); |
bd5635a1 | 475 | |
bd5635a1 | 476 | /* Don't put these on the cleanup chain; they need to stick around |
9404978d | 477 | until the next call to dbx_new_init. *Then* we'll free them. */ |
bd5635a1 RP |
478 | if (symfile_string_table) |
479 | { | |
480 | free (symfile_string_table); | |
481 | symfile_string_table = 0; | |
482 | symfile_string_table_size = 0; | |
483 | } | |
484 | free_and_init_header_files (); | |
485 | } | |
486 | ||
487 | ||
488 | /* dbx_symfile_init () | |
489 | is the dbx-specific initialization routine for reading symbols. | |
490 | It is passed a struct sym_fns which contains, among other things, | |
491 | the BFD for the file whose symbols are being read, and a slot for a pointer | |
492 | to "private data" which we fill with goodies. | |
493 | ||
494 | We read the string table into malloc'd space and stash a pointer to it. | |
495 | ||
496 | Since BFD doesn't know how to read debug symbols in a format-independent | |
497 | way (and may never do so...), we have to do it ourselves. We will never | |
498 | be called unless this is an a.out (or very similar) file. | |
499 | FIXME, there should be a cleaner peephole into the BFD environment here. */ | |
500 | ||
9bba3334 | 501 | static void |
bd5635a1 RP |
502 | dbx_symfile_init (sf) |
503 | struct sym_fns *sf; | |
504 | { | |
505 | int val; | |
7d9884b9 | 506 | bfd *sym_bfd = sf->objfile->obfd; |
bd5635a1 RP |
507 | char *name = bfd_get_filename (sym_bfd); |
508 | struct dbx_symfile_info *info; | |
509 | unsigned char size_temp[4]; | |
510 | ||
511 | /* Allocate struct to keep track of the symfile */ | |
318bf84f | 512 | sf->sym_private = xmmalloc (sf->objfile->md, sizeof (*info)); |
bd5635a1 RP |
513 | info = (struct dbx_symfile_info *)sf->sym_private; |
514 | ||
515 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
bd5635a1 RP |
516 | #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) |
517 | #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) | |
518 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
519 | ||
bd5635a1 RP |
520 | info->text_sect = bfd_get_section_by_name (sym_bfd, ".text"); |
521 | if (!info->text_sect) | |
522 | abort(); | |
63989338 | 523 | info->symcount = bfd_get_symcount (sym_bfd); |
bd5635a1 RP |
524 | |
525 | /* Read the string table size and check it for bogosity. */ | |
7d9884b9 | 526 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 RP |
527 | if (val < 0) |
528 | perror_with_name (name); | |
bd5635a1 | 529 | |
7d9884b9 | 530 | val = bfd_read (size_temp, sizeof (long), 1, sym_bfd); |
bd5635a1 RP |
531 | if (val < 0) |
532 | perror_with_name (name); | |
dcc35536 | 533 | info->stringtab_size = bfd_h_get_32 (sym_bfd, size_temp); |
bd5635a1 | 534 | |
7d9884b9 | 535 | if (info->stringtab_size >= 0) |
bd5635a1 | 536 | { |
021959e2 | 537 | /* Yes, this should be malloc, not xmalloc. We check its result. */ |
318bf84f | 538 | info->stringtab = (char *) mmalloc (sf->objfile->md, info->stringtab_size); |
bd5635a1 RP |
539 | /* Caller is responsible for freeing the string table. No cleanup. */ |
540 | } | |
541 | else | |
542 | info->stringtab = NULL; | |
543 | if (info->stringtab == NULL && info->stringtab_size != 0) | |
544 | error ("ridiculous string table size: %d bytes", info->stringtab_size); | |
545 | ||
546 | /* Now read in the string table in one big gulp. */ | |
547 | ||
7d9884b9 | 548 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 RP |
549 | if (val < 0) |
550 | perror_with_name (name); | |
7d9884b9 JG |
551 | val = bfd_read (info->stringtab, info->stringtab_size, 1, sym_bfd); |
552 | if (val != info->stringtab_size) | |
bd5635a1 RP |
553 | perror_with_name (name); |
554 | ||
555 | /* Record the position of the symbol table for later use. */ | |
556 | ||
557 | info->symtab_offset = SYMBOL_TABLE_OFFSET; | |
558 | } | |
559 | \f | |
560 | /* Buffer for reading the symbol table entries. */ | |
afe4ca15 | 561 | static struct internal_nlist symbuf[4096]; |
bd5635a1 RP |
562 | static int symbuf_idx; |
563 | static int symbuf_end; | |
564 | ||
bd5635a1 RP |
565 | /* The address in memory of the string table of the object file we are |
566 | reading (which might not be the "main" object file, but might be a | |
567 | shared library or some other dynamically loaded thing). This is set | |
568 | by read_dbx_symtab when building psymtabs, and by read_ofile_symtab | |
569 | when building symtabs, and is used only by next_symbol_text. */ | |
570 | static char *stringtab_global; | |
571 | ||
572 | /* Refill the symbol table input buffer | |
573 | and set the variables that control fetching entries from it. | |
574 | Reports an error if no data available. | |
575 | This function can read past the end of the symbol table | |
576 | (into the string table) but this does no harm. */ | |
577 | ||
7d9884b9 JG |
578 | static void |
579 | fill_symbuf (sym_bfd) | |
580 | bfd *sym_bfd; | |
bd5635a1 | 581 | { |
7d9884b9 | 582 | int nbytes = bfd_read (symbuf, sizeof (symbuf), 1, sym_bfd); |
bd5635a1 | 583 | if (nbytes < 0) |
7d9884b9 | 584 | perror_with_name (bfd_get_filename (sym_bfd)); |
bd5635a1 RP |
585 | else if (nbytes == 0) |
586 | error ("Premature end of file reading symbol table"); | |
afe4ca15 | 587 | symbuf_end = nbytes / symbol_size; |
bd5635a1 | 588 | symbuf_idx = 0; |
bd5635a1 RP |
589 | } |
590 | ||
7d9884b9 | 591 | #define SWAP_SYMBOL(symp, abfd) \ |
bd5635a1 | 592 | { \ |
7d9884b9 | 593 | (symp)->n_strx = bfd_h_get_32(abfd, \ |
afe4ca15 | 594 | (unsigned char *)&(symp)->n_strx); \ |
7d9884b9 | 595 | (symp)->n_desc = bfd_h_get_16 (abfd, \ |
bd5635a1 | 596 | (unsigned char *)&(symp)->n_desc); \ |
7d9884b9 | 597 | (symp)->n_value = bfd_h_get_32 (abfd, \ |
bd5635a1 RP |
598 | (unsigned char *)&(symp)->n_value); \ |
599 | } | |
600 | ||
601 | /* Invariant: The symbol pointed to by symbuf_idx is the first one | |
602 | that hasn't been swapped. Swap the symbol at the same time | |
603 | that symbuf_idx is incremented. */ | |
604 | ||
605 | /* dbx allows the text of a symbol name to be continued into the | |
606 | next symbol name! When such a continuation is encountered | |
607 | (a \ at the end of the text of a name) | |
608 | call this function to get the continuation. */ | |
609 | ||
021959e2 | 610 | static char * |
aab77d5f | 611 | dbx_next_symbol_text () |
bd5635a1 RP |
612 | { |
613 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 614 | fill_symbuf (symfile_bfd); |
bd5635a1 | 615 | symnum++; |
7d9884b9 | 616 | SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd); |
afe4ca15 | 617 | return symbuf[symbuf_idx++].n_strx + stringtab_global; |
bd5635a1 RP |
618 | } |
619 | \f | |
620 | /* Initializes storage for all of the partial symbols that will be | |
621 | created by read_dbx_symtab and subsidiaries. */ | |
622 | ||
623 | static void | |
021959e2 | 624 | init_psymbol_list (total_symbols, objfile) |
bd5635a1 | 625 | int total_symbols; |
021959e2 | 626 | struct objfile *objfile; |
bd5635a1 RP |
627 | { |
628 | /* Free any previously allocated psymbol lists. */ | |
021959e2 | 629 | if (objfile -> global_psymbols.list) |
318bf84f | 630 | mfree (objfile -> md, objfile -> global_psymbols.list); |
021959e2 | 631 | if (objfile -> static_psymbols.list) |
318bf84f | 632 | mfree (objfile -> md, objfile -> static_psymbols.list); |
bd5635a1 RP |
633 | |
634 | /* Current best guess is that there are approximately a twentieth | |
635 | of the total symbols (in a debugging file) are global or static | |
636 | oriented symbols */ | |
021959e2 JG |
637 | objfile -> global_psymbols.size = total_symbols / 10; |
638 | objfile -> static_psymbols.size = total_symbols / 10; | |
639 | objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 640 | xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol)); |
021959e2 | 641 | objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *) |
318bf84f | 642 | xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol)); |
bd5635a1 RP |
643 | } |
644 | ||
645 | /* Initialize the list of bincls to contain none and have some | |
646 | allocated. */ | |
647 | ||
648 | static void | |
021959e2 | 649 | init_bincl_list (number, objfile) |
bd5635a1 | 650 | int number; |
021959e2 | 651 | struct objfile *objfile; |
bd5635a1 RP |
652 | { |
653 | bincls_allocated = number; | |
654 | next_bincl = bincl_list = (struct header_file_location *) | |
318bf84f | 655 | xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location)); |
bd5635a1 RP |
656 | } |
657 | ||
658 | /* Add a bincl to the list. */ | |
659 | ||
660 | static void | |
661 | add_bincl_to_list (pst, name, instance) | |
662 | struct partial_symtab *pst; | |
663 | char *name; | |
664 | int instance; | |
665 | { | |
666 | if (next_bincl >= bincl_list + bincls_allocated) | |
667 | { | |
668 | int offset = next_bincl - bincl_list; | |
669 | bincls_allocated *= 2; | |
670 | bincl_list = (struct header_file_location *) | |
318bf84f | 671 | xmrealloc (pst->objfile->md, (char *)bincl_list, |
bd5635a1 RP |
672 | bincls_allocated * sizeof (struct header_file_location)); |
673 | next_bincl = bincl_list + offset; | |
674 | } | |
675 | next_bincl->pst = pst; | |
676 | next_bincl->instance = instance; | |
677 | next_bincl++->name = name; | |
678 | } | |
679 | ||
680 | /* Given a name, value pair, find the corresponding | |
681 | bincl in the list. Return the partial symtab associated | |
682 | with that header_file_location. */ | |
683 | ||
9bba3334 | 684 | static struct partial_symtab * |
bd5635a1 RP |
685 | find_corresponding_bincl_psymtab (name, instance) |
686 | char *name; | |
687 | int instance; | |
688 | { | |
689 | struct header_file_location *bincl; | |
690 | ||
691 | for (bincl = bincl_list; bincl < next_bincl; bincl++) | |
692 | if (bincl->instance == instance | |
693 | && !strcmp (name, bincl->name)) | |
694 | return bincl->pst; | |
695 | ||
696 | return (struct partial_symtab *) 0; | |
697 | } | |
698 | ||
699 | /* Free the storage allocated for the bincl list. */ | |
700 | ||
701 | static void | |
021959e2 JG |
702 | free_bincl_list (objfile) |
703 | struct objfile *objfile; | |
bd5635a1 | 704 | { |
318bf84f | 705 | mfree (objfile -> md, bincl_list); |
bd5635a1 RP |
706 | bincls_allocated = 0; |
707 | } | |
708 | ||
bd5635a1 RP |
709 | /* Given pointers to an a.out symbol table in core containing dbx |
710 | style data, setup partial_symtab's describing each source file for | |
711 | which debugging information is available. NLISTLEN is the number | |
712 | of symbols in the symbol table. All symbol names are given as | |
713 | offsets relative to STRINGTAB. STRINGTAB_SIZE is the size of | |
714 | STRINGTAB. SYMFILE_NAME is the name of the file we are reading from | |
715 | and ADDR is its relocated address (if incremental) or 0 (if not). */ | |
716 | ||
717 | static void | |
7d9884b9 | 718 | read_dbx_symtab (addr, objfile, stringtab, stringtab_size, nlistlen, |
bd5635a1 | 719 | text_addr, text_size) |
bd5635a1 | 720 | CORE_ADDR addr; |
7d9884b9 | 721 | struct objfile *objfile; |
bd5635a1 RP |
722 | register char *stringtab; |
723 | register long stringtab_size; | |
724 | register int nlistlen; | |
725 | CORE_ADDR text_addr; | |
726 | int text_size; | |
727 | { | |
afe4ca15 | 728 | register struct internal_nlist *bufp; |
bd5635a1 | 729 | register char *namestring; |
bd5635a1 RP |
730 | int nsl; |
731 | int past_first_source_file = 0; | |
732 | CORE_ADDR last_o_file_start = 0; | |
733 | struct cleanup *old_chain; | |
7d9884b9 | 734 | bfd *abfd; |
bd5635a1 RP |
735 | |
736 | /* End of the text segment of the executable file. */ | |
737 | CORE_ADDR end_of_text_addr; | |
738 | ||
739 | /* Current partial symtab */ | |
740 | struct partial_symtab *pst; | |
741 | ||
742 | /* List of current psymtab's include files */ | |
743 | char **psymtab_include_list; | |
744 | int includes_allocated; | |
745 | int includes_used; | |
746 | ||
747 | /* Index within current psymtab dependency list */ | |
748 | struct partial_symtab **dependency_list; | |
749 | int dependencies_used, dependencies_allocated; | |
750 | ||
751 | stringtab_global = stringtab; | |
752 | ||
753 | pst = (struct partial_symtab *) 0; | |
754 | ||
755 | includes_allocated = 30; | |
756 | includes_used = 0; | |
757 | psymtab_include_list = (char **) alloca (includes_allocated * | |
758 | sizeof (char *)); | |
759 | ||
760 | dependencies_allocated = 30; | |
761 | dependencies_used = 0; | |
762 | dependency_list = | |
763 | (struct partial_symtab **) alloca (dependencies_allocated * | |
764 | sizeof (struct partial_symtab *)); | |
765 | ||
7d9884b9 | 766 | old_chain = make_cleanup (free_objfile, objfile); |
bd5635a1 RP |
767 | |
768 | /* Init bincl list */ | |
021959e2 JG |
769 | init_bincl_list (20, objfile); |
770 | make_cleanup (free_bincl_list, objfile); | |
bd5635a1 RP |
771 | |
772 | last_source_file = 0; | |
773 | ||
774 | #ifdef END_OF_TEXT_DEFAULT | |
775 | end_of_text_addr = END_OF_TEXT_DEFAULT; | |
776 | #else | |
5bc757e2 | 777 | end_of_text_addr = text_addr + addr + text_size; /* Relocate */ |
bd5635a1 RP |
778 | #endif |
779 | ||
7d9884b9 JG |
780 | symfile_bfd = objfile->obfd; /* For next_text_symbol */ |
781 | abfd = objfile->obfd; | |
bd5635a1 | 782 | symbuf_end = symbuf_idx = 0; |
aab77d5f | 783 | next_symbol_text_func = dbx_next_symbol_text; |
bd5635a1 RP |
784 | |
785 | for (symnum = 0; symnum < nlistlen; symnum++) | |
786 | { | |
787 | /* Get the symbol for this run and pull out some info */ | |
788 | QUIT; /* allow this to be interruptable */ | |
789 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 790 | fill_symbuf (abfd); |
bd5635a1 RP |
791 | bufp = &symbuf[symbuf_idx++]; |
792 | ||
793 | /* | |
794 | * Special case to speed up readin. | |
795 | */ | |
796 | if (bufp->n_type == (unsigned char)N_SLINE) continue; | |
797 | ||
7d9884b9 | 798 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 RP |
799 | |
800 | /* Ok. There is a lot of code duplicated in the rest of this | |
801 | switch statement (for efficiency reasons). Since I don't | |
802 | like duplicating code, I will do my penance here, and | |
803 | describe the code which is duplicated: | |
804 | ||
805 | *) The assignment to namestring. | |
806 | *) The call to strchr. | |
807 | *) The addition of a partial symbol the the two partial | |
808 | symbol lists. This last is a large section of code, so | |
809 | I've imbedded it in the following macro. | |
810 | */ | |
811 | ||
812 | /* Set namestring based on bufp. If the string table index is invalid, | |
813 | give a fake name, and print a single error message per symbol file read, | |
814 | rather than abort the symbol reading or flood the user with messages. */ | |
815 | #define SET_NAMESTRING()\ | |
7d9884b9 | 816 | if (((unsigned)bufp->n_strx) >= stringtab_size) { \ |
021959e2 | 817 | complain (&string_table_offset_complaint, (char *) symnum); \ |
bd5635a1 RP |
818 | namestring = "foo"; \ |
819 | } else \ | |
afe4ca15 | 820 | namestring = bufp->n_strx + stringtab |
bd5635a1 | 821 | |
7e258d18 PB |
822 | #define CUR_SYMBOL_TYPE bufp->n_type |
823 | #define CUR_SYMBOL_VALUE bufp->n_value | |
824 | #define DBXREAD_ONLY | |
7e258d18 PB |
825 | #define START_PSYMTAB(ofile,addr,fname,low,symoff,global_syms,static_syms)\ |
826 | start_psymtab(ofile, addr, fname, low, symoff, global_syms, static_syms) | |
827 | #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\ | |
828 | end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) | |
aab77d5f | 829 | |
7e258d18 | 830 | #include "partial-stab.h" |
bd5635a1 RP |
831 | } |
832 | ||
833 | /* If there's stuff to be cleaned up, clean it up. */ | |
63989338 JG |
834 | if (nlistlen > 0 /* We have some syms */ |
835 | && entry_point < bufp->n_value | |
bd5635a1 RP |
836 | && entry_point >= last_o_file_start) |
837 | { | |
838 | startup_file_start = last_o_file_start; | |
839 | startup_file_end = bufp->n_value; | |
840 | } | |
841 | ||
842 | if (pst) | |
843 | { | |
844 | end_psymtab (pst, psymtab_include_list, includes_used, | |
afe4ca15 | 845 | symnum * symbol_size, end_of_text_addr, |
7e258d18 | 846 | dependency_list, dependencies_used); |
bd5635a1 RP |
847 | } |
848 | ||
021959e2 | 849 | free_bincl_list (objfile); |
bd5635a1 RP |
850 | discard_cleanups (old_chain); |
851 | } | |
852 | ||
4a35d6e9 FF |
853 | /* Allocate and partially fill a partial symtab. It will be |
854 | completely filled at the end of the symbol list. | |
855 | ||
856 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
857 | is the address relative to which its symbols are (incremental) or 0 | |
858 | (normal). */ | |
859 | ||
bd5635a1 | 860 | |
7e258d18 | 861 | struct partial_symtab * |
7d9884b9 | 862 | start_psymtab (objfile, addr, |
bd5635a1 | 863 | filename, textlow, ldsymoff, global_syms, static_syms) |
7d9884b9 | 864 | struct objfile *objfile; |
bd5635a1 RP |
865 | CORE_ADDR addr; |
866 | char *filename; | |
867 | CORE_ADDR textlow; | |
868 | int ldsymoff; | |
869 | struct partial_symbol *global_syms; | |
870 | struct partial_symbol *static_syms; | |
871 | { | |
872 | struct partial_symtab *result = | |
021959e2 JG |
873 | start_psymtab_common(objfile, addr, |
874 | filename, textlow, global_syms, static_syms); | |
bd5635a1 | 875 | |
021959e2 JG |
876 | result->read_symtab_private = (char *) |
877 | obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc)); | |
878 | LDSYMOFF(result) = ldsymoff; | |
bd5635a1 RP |
879 | result->read_symtab = dbx_psymtab_to_symtab; |
880 | ||
bd5635a1 RP |
881 | return result; |
882 | } | |
883 | ||
bd5635a1 RP |
884 | /* Close off the current usage of a partial_symbol table entry. This |
885 | involves setting the correct number of includes (with a realloc), | |
886 | setting the high text mark, setting the symbol length in the | |
887 | executable, and setting the length of the global and static lists | |
888 | of psymbols. | |
889 | ||
890 | The global symbols and static symbols are then seperately sorted. | |
891 | ||
892 | Then the partial symtab is put on the global list. | |
893 | *** List variables and peculiarities of same. *** | |
894 | */ | |
021959e2 | 895 | |
7e258d18 | 896 | void |
bd5635a1 | 897 | end_psymtab (pst, include_list, num_includes, capping_symbol_offset, |
7e258d18 | 898 | capping_text, dependency_list, number_dependencies) |
bd5635a1 RP |
899 | struct partial_symtab *pst; |
900 | char **include_list; | |
901 | int num_includes; | |
902 | int capping_symbol_offset; | |
903 | CORE_ADDR capping_text; | |
904 | struct partial_symtab **dependency_list; | |
905 | int number_dependencies; | |
7e258d18 | 906 | /* struct partial_symbol *capping_global, *capping_static;*/ |
bd5635a1 RP |
907 | { |
908 | int i; | |
021959e2 | 909 | struct objfile *objfile = pst -> objfile; |
bd5635a1 | 910 | |
7e258d18 PB |
911 | if (capping_symbol_offset != -1) |
912 | LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst); | |
bd5635a1 RP |
913 | pst->texthigh = capping_text; |
914 | ||
915 | pst->n_global_syms = | |
021959e2 | 916 | objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
bd5635a1 | 917 | pst->n_static_syms = |
021959e2 | 918 | objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
bd5635a1 RP |
919 | |
920 | pst->number_of_dependencies = number_dependencies; | |
921 | if (number_dependencies) | |
922 | { | |
923 | pst->dependencies = (struct partial_symtab **) | |
021959e2 | 924 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 | 925 | number_dependencies * sizeof (struct partial_symtab *)); |
7e258d18 | 926 | memcpy (pst->dependencies, dependency_list, |
bd5635a1 RP |
927 | number_dependencies * sizeof (struct partial_symtab *)); |
928 | } | |
929 | else | |
930 | pst->dependencies = 0; | |
931 | ||
932 | for (i = 0; i < num_includes; i++) | |
933 | { | |
bd5635a1 | 934 | struct partial_symtab *subpst = |
021959e2 | 935 | allocate_psymtab (include_list[i], objfile); |
7d9884b9 | 936 | |
bd5635a1 | 937 | subpst->addr = pst->addr; |
021959e2 JG |
938 | subpst->read_symtab_private = |
939 | (char *) obstack_alloc (&objfile->psymbol_obstack, | |
940 | sizeof (struct symloc)); | |
4a35d6e9 FF |
941 | LDSYMOFF(subpst) = |
942 | LDSYMLEN(subpst) = | |
bd5635a1 RP |
943 | subpst->textlow = |
944 | subpst->texthigh = 0; | |
945 | ||
3f83182d JG |
946 | /* We could save slight bits of space by only making one of these, |
947 | shared by the entire set of include files. FIXME-someday. */ | |
bd5635a1 | 948 | subpst->dependencies = (struct partial_symtab **) |
021959e2 | 949 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 RP |
950 | sizeof (struct partial_symtab *)); |
951 | subpst->dependencies[0] = pst; | |
952 | subpst->number_of_dependencies = 1; | |
953 | ||
954 | subpst->globals_offset = | |
955 | subpst->n_global_syms = | |
956 | subpst->statics_offset = | |
957 | subpst->n_static_syms = 0; | |
958 | ||
959 | subpst->readin = 0; | |
9a822037 | 960 | subpst->symtab = 0; |
bd5635a1 | 961 | subpst->read_symtab = dbx_psymtab_to_symtab; |
bd5635a1 RP |
962 | } |
963 | ||
021959e2 | 964 | sort_pst_symbols (pst); |
bd5635a1 | 965 | |
f9623881 JG |
966 | /* If there is already a psymtab or symtab for a file of this name, remove it. |
967 | (If there is a symtab, more drastic things also happen.) | |
968 | This happens in VxWorks. */ | |
969 | free_named_symtabs (pst->filename); | |
970 | ||
7d9884b9 JG |
971 | if (num_includes == 0 |
972 | && number_dependencies == 0 | |
973 | && pst->n_global_syms == 0 | |
974 | && pst->n_static_syms == 0) { | |
975 | /* Throw away this psymtab, it's empty. We can't deallocate it, since | |
976 | it is on the obstack, but we can forget to chain it on the list. */ | |
318bf84f FF |
977 | struct partial_symtab *prev_pst; |
978 | ||
979 | /* First, snip it out of the psymtab chain */ | |
980 | ||
981 | if (pst->objfile->psymtabs == pst) | |
982 | pst->objfile->psymtabs = pst->next; | |
983 | else | |
984 | for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next) | |
985 | if (prev_pst->next == pst) | |
986 | prev_pst->next = pst->next; | |
987 | ||
988 | /* Next, put it on a free list for recycling */ | |
989 | ||
990 | pst->next = pst->objfile->free_psymtabs; | |
991 | pst->objfile->free_psymtabs = pst; | |
7d9884b9 | 992 | } |
bd5635a1 RP |
993 | } |
994 | \f | |
995 | static void | |
7d9884b9 | 996 | psymtab_to_symtab_1 (pst, stringtab, stringtab_size, sym_offset) |
bd5635a1 | 997 | struct partial_symtab *pst; |
bd5635a1 RP |
998 | char *stringtab; |
999 | int stringtab_size; | |
1000 | int sym_offset; | |
1001 | { | |
1002 | struct cleanup *old_chain; | |
1003 | int i; | |
1004 | ||
1005 | if (!pst) | |
1006 | return; | |
1007 | ||
1008 | if (pst->readin) | |
1009 | { | |
1010 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1011 | pst->filename); | |
1012 | return; | |
1013 | } | |
1014 | ||
afe4ca15 | 1015 | /* Read in all partial symtabs on which this one is dependent */ |
bd5635a1 RP |
1016 | for (i = 0; i < pst->number_of_dependencies; i++) |
1017 | if (!pst->dependencies[i]->readin) | |
1018 | { | |
1019 | /* Inform about additional files that need to be read in. */ | |
1020 | if (info_verbose) | |
1021 | { | |
1022 | fputs_filtered (" ", stdout); | |
1023 | wrap_here (""); | |
1024 | fputs_filtered ("and ", stdout); | |
1025 | wrap_here (""); | |
1026 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
1027 | wrap_here (""); /* Flush output */ | |
1028 | fflush (stdout); | |
1029 | } | |
7d9884b9 | 1030 | psymtab_to_symtab_1 (pst->dependencies[i], |
bd5635a1 RP |
1031 | stringtab, stringtab_size, sym_offset); |
1032 | } | |
1033 | ||
4a35d6e9 | 1034 | if (LDSYMLEN(pst)) /* Otherwise it's a dummy */ |
bd5635a1 RP |
1035 | { |
1036 | /* Init stuff necessary for reading in symbols */ | |
c0302457 | 1037 | buildsym_init (); |
bd5635a1 RP |
1038 | old_chain = make_cleanup (really_free_pendings, 0); |
1039 | ||
1040 | /* Read in this files symbols */ | |
7d9884b9 | 1041 | bfd_seek (pst->objfile->obfd, sym_offset, L_SET); |
9404978d | 1042 | pst->symtab = |
7d9884b9 | 1043 | read_ofile_symtab (pst->objfile, stringtab, stringtab_size, |
4a35d6e9 FF |
1044 | LDSYMOFF(pst), |
1045 | LDSYMLEN(pst), pst->textlow, | |
9404978d MT |
1046 | pst->texthigh - pst->textlow, pst->addr); |
1047 | sort_symtab_syms (pst->symtab); | |
bd5635a1 RP |
1048 | |
1049 | do_cleanups (old_chain); | |
1050 | } | |
1051 | ||
1052 | pst->readin = 1; | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Read in all of the symbols for a given psymtab for real. | |
1057 | * Be verbose about it if the user wants that. | |
1058 | */ | |
1059 | static void | |
1060 | dbx_psymtab_to_symtab (pst) | |
1061 | struct partial_symtab *pst; | |
1062 | { | |
bd5635a1 RP |
1063 | char *stringtab; |
1064 | int stsize, val; | |
bd5635a1 RP |
1065 | bfd *sym_bfd; |
1066 | long st_temp; | |
1067 | ||
1068 | if (!pst) | |
1069 | return; | |
1070 | ||
1071 | if (pst->readin) | |
1072 | { | |
1073 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1074 | pst->filename); | |
1075 | return; | |
1076 | } | |
1077 | ||
4a35d6e9 | 1078 | if (LDSYMLEN(pst) || pst->number_of_dependencies) |
bd5635a1 RP |
1079 | { |
1080 | /* Print the message now, before reading the string table, | |
1081 | to avoid disconcerting pauses. */ | |
1082 | if (info_verbose) | |
1083 | { | |
1084 | printf_filtered ("Reading in symbols for %s...", pst->filename); | |
1085 | fflush (stdout); | |
1086 | } | |
1087 | ||
7d9884b9 | 1088 | sym_bfd = pst->objfile->obfd; |
bd5635a1 | 1089 | |
7d9884b9 | 1090 | /* We keep the string table for the main symfile resident in memory, but |
bd5635a1 | 1091 | not the string table for any other symbol files. */ |
7d9884b9 | 1092 | if (symfile_objfile != pst->objfile) |
bd5635a1 RP |
1093 | { |
1094 | /* Read in the string table */ | |
1095 | ||
1096 | /* FIXME, this uses internal BFD variables. See above in | |
1097 | dbx_symbol_file_open where the macro is defined! */ | |
7d9884b9 | 1098 | bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 | 1099 | |
7d9884b9 | 1100 | val = bfd_read (&st_temp, sizeof st_temp, 1, sym_bfd); |
bd5635a1 | 1101 | if (val < 0) |
7d9884b9 | 1102 | perror_with_name (pst->objfile->name); |
dcc35536 | 1103 | stsize = bfd_h_get_32 (sym_bfd, (unsigned char *)&st_temp); |
7d9884b9 JG |
1104 | #if 0 |
1105 | /* BFD doesn't provide a way to know the total file size, sigh */ | |
1106 | struct stat statbuf; | |
bd5635a1 | 1107 | if (fstat (desc, &statbuf) < 0) |
7d9884b9 | 1108 | perror_with_name (pst->objfile->name); |
bd5635a1 RP |
1109 | |
1110 | if (stsize >= 0 && stsize < statbuf.st_size) | |
7d9884b9 JG |
1111 | #else |
1112 | if (stsize >= 0) | |
1113 | #endif | |
bd5635a1 RP |
1114 | { |
1115 | #ifdef BROKEN_LARGE_ALLOCA | |
318bf84f FF |
1116 | stringtab = (char *) xmalloc (stsize); |
1117 | make_cleanup (free, stringtab); | |
bd5635a1 RP |
1118 | #else |
1119 | stringtab = (char *) alloca (stsize); | |
1120 | #endif | |
1121 | } | |
1122 | else | |
1123 | stringtab = NULL; | |
1124 | if (stringtab == NULL && stsize != 0) | |
1125 | error ("ridiculous string table size: %d bytes", stsize); | |
1126 | ||
1127 | /* FIXME, this uses internal BFD variables. See above in | |
1128 | dbx_symbol_file_open where the macro is defined! */ | |
7d9884b9 | 1129 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 | 1130 | if (val < 0) |
7d9884b9 JG |
1131 | perror_with_name (pst->objfile->name); |
1132 | val = bfd_read (stringtab, stsize, 1, sym_bfd); | |
bd5635a1 | 1133 | if (val < 0) |
7d9884b9 | 1134 | perror_with_name (pst->objfile->name); |
bd5635a1 RP |
1135 | } |
1136 | else | |
1137 | { | |
1138 | stringtab = symfile_string_table; | |
1139 | stsize = symfile_string_table_size; | |
1140 | } | |
1141 | ||
afe4ca15 JG |
1142 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
1143 | symbol_size = obj_symbol_entry_size (sym_bfd); | |
bd5635a1 | 1144 | |
aab77d5f PB |
1145 | next_symbol_text_func = dbx_next_symbol_text; |
1146 | ||
bd5635a1 RP |
1147 | /* FIXME, this uses internal BFD variables. See above in |
1148 | dbx_symbol_file_open where the macro is defined! */ | |
7d9884b9 | 1149 | psymtab_to_symtab_1 (pst, stringtab, stsize, |
bd5635a1 RP |
1150 | SYMBOL_TABLE_OFFSET); |
1151 | ||
1152 | /* Match with global symbols. This only needs to be done once, | |
1153 | after all of the symtabs and dependencies have been read in. */ | |
021959e2 | 1154 | scan_file_globals (pst->objfile); |
bd5635a1 | 1155 | |
bd5635a1 RP |
1156 | /* Finish up the debug error message. */ |
1157 | if (info_verbose) | |
1158 | printf_filtered ("done.\n"); | |
1159 | } | |
1160 | } | |
1161 | ||
bd5635a1 RP |
1162 | /* |
1163 | * Read in a defined section of a specific object file's symbols. | |
1164 | * | |
1165 | * DESC is the file descriptor for the file, positioned at the | |
1166 | * beginning of the symtab | |
1167 | * STRINGTAB is a pointer to the files string | |
1168 | * table, already read in | |
1169 | * SYM_OFFSET is the offset within the file of | |
1170 | * the beginning of the symbols we want to read, NUM_SUMBOLS is the | |
1171 | * number of symbols to read | |
1172 | * TEXT_OFFSET is the beginning of the text segment we are reading symbols for | |
1173 | * TEXT_SIZE is the size of the text segment read in. | |
1174 | * OFFSET is a relocation offset which gets added to each symbol | |
1175 | */ | |
1176 | ||
9404978d | 1177 | static struct symtab * |
7d9884b9 | 1178 | read_ofile_symtab (objfile, stringtab, stringtab_size, sym_offset, |
bd5635a1 | 1179 | sym_size, text_offset, text_size, offset) |
7d9884b9 | 1180 | struct objfile *objfile; |
bd5635a1 RP |
1181 | register char *stringtab; |
1182 | unsigned int stringtab_size; | |
1183 | int sym_offset; | |
1184 | int sym_size; | |
1185 | CORE_ADDR text_offset; | |
1186 | int text_size; | |
1187 | int offset; | |
1188 | { | |
1189 | register char *namestring; | |
7d9884b9 | 1190 | register struct internal_nlist *bufp; |
bd5635a1 | 1191 | unsigned char type; |
afe4ca15 | 1192 | unsigned max_symnum; |
7d9884b9 JG |
1193 | register bfd *abfd; |
1194 | ||
021959e2 | 1195 | current_objfile = objfile; |
bd5635a1 RP |
1196 | subfile_stack = 0; |
1197 | ||
1198 | stringtab_global = stringtab; | |
1199 | last_source_file = 0; | |
1200 | ||
7d9884b9 JG |
1201 | abfd = objfile->obfd; |
1202 | symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ | |
1203 | our_objfile = objfile; /* For end_symtab calls in process_one_symbol */ | |
bd5635a1 RP |
1204 | symbuf_end = symbuf_idx = 0; |
1205 | ||
1206 | /* It is necessary to actually read one symbol *before* the start | |
1207 | of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL | |
1208 | occurs before the N_SO symbol. | |
1209 | ||
1210 | Detecting this in read_dbx_symtab | |
1211 | would slow down initial readin, so we look for it here instead. */ | |
afe4ca15 | 1212 | if (sym_offset >= (int)symbol_size) |
bd5635a1 | 1213 | { |
7d9884b9 JG |
1214 | bfd_seek (symfile_bfd, sym_offset - symbol_size, L_INCR); |
1215 | fill_symbuf (abfd); | |
bd5635a1 | 1216 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1217 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1218 | |
afe4ca15 | 1219 | SET_NAMESTRING (); |
bd5635a1 RP |
1220 | |
1221 | processing_gcc_compilation = | |
1222 | (bufp->n_type == N_TEXT | |
0cf9329b PB |
1223 | && (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0 |
1224 | || strcmp(namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)); | |
bd5635a1 RP |
1225 | } |
1226 | else | |
1227 | { | |
1228 | /* The N_SO starting this symtab is the first symbol, so we | |
1229 | better not check the symbol before it. I'm not this can | |
1230 | happen, but it doesn't hurt to check for it. */ | |
7d9884b9 | 1231 | bfd_seek (symfile_bfd, sym_offset, L_INCR); |
bd5635a1 RP |
1232 | processing_gcc_compilation = 0; |
1233 | } | |
1234 | ||
1235 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1236 | fill_symbuf (abfd); |
bd5635a1 RP |
1237 | bufp = &symbuf[symbuf_idx]; |
1238 | if (bufp->n_type != (unsigned char)N_SO) | |
1239 | error("First symbol in segment of executable not a source symbol"); | |
1240 | ||
afe4ca15 JG |
1241 | max_symnum = sym_size / symbol_size; |
1242 | ||
bd5635a1 | 1243 | for (symnum = 0; |
afe4ca15 | 1244 | symnum < max_symnum; |
bd5635a1 RP |
1245 | symnum++) |
1246 | { | |
1247 | QUIT; /* Allow this to be interruptable */ | |
1248 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1249 | fill_symbuf(abfd); |
bd5635a1 | 1250 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1251 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1252 | |
c0302457 | 1253 | type = bufp->n_type; |
bd5635a1 RP |
1254 | if (type == (unsigned char)N_CATCH) |
1255 | { | |
1256 | /* N_CATCH is not fixed up by the linker, and unfortunately, | |
1257 | there's no other place to put it in the .stab map. */ | |
c55e6167 | 1258 | bufp->n_value += text_offset - offset; |
bd5635a1 | 1259 | } |
bd5635a1 | 1260 | |
afe4ca15 | 1261 | SET_NAMESTRING (); |
bd5635a1 | 1262 | |
7d9884b9 | 1263 | if (type & N_STAB) { |
c55e6167 JG |
1264 | process_one_symbol (type, bufp->n_desc, bufp->n_value, |
1265 | namestring, offset); | |
1266 | /* our_objfile is an implicit parameter. */ | |
7d9884b9 | 1267 | } |
bd5635a1 RP |
1268 | /* We skip checking for a new .o or -l file; that should never |
1269 | happen in this routine. */ | |
1270 | else if (type == N_TEXT | |
0cf9329b PB |
1271 | && (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0 |
1272 | || strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)) | |
bd5635a1 RP |
1273 | /* I don't think this code will ever be executed, because |
1274 | the GCC_COMPILED_FLAG_SYMBOL usually is right before | |
1275 | the N_SO symbol which starts this source file. | |
1276 | However, there is no reason not to accept | |
1277 | the GCC_COMPILED_FLAG_SYMBOL anywhere. */ | |
1278 | processing_gcc_compilation = 1; | |
1279 | else if (type & N_EXT || type == (unsigned char)N_TEXT | |
1280 | || type == (unsigned char)N_NBTEXT | |
0c4d2cc2 | 1281 | ) { |
bd5635a1 RP |
1282 | /* Global symbol: see if we came across a dbx defintion for |
1283 | a corresponding symbol. If so, store the value. Remove | |
1284 | syms from the chain when their values are stored, but | |
1285 | search the whole chain, as there may be several syms from | |
1286 | different files with the same name. */ | |
1287 | /* This is probably not true. Since the files will be read | |
1288 | in one at a time, each reference to a global symbol will | |
1289 | be satisfied in each file as it appears. So we skip this | |
1290 | section. */ | |
1291 | ; | |
0c4d2cc2 | 1292 | } |
bd5635a1 | 1293 | } |
9404978d | 1294 | |
021959e2 JG |
1295 | current_objfile = NULL; |
1296 | return (end_symtab (text_offset + text_size, 0, 0, objfile)); | |
bd5635a1 | 1297 | } |
bd5635a1 | 1298 | \f |
c55e6167 JG |
1299 | /* This handles a single symbol from the symbol-file, building symbols |
1300 | into a GDB symtab. It takes these arguments and an implicit argument. | |
1301 | ||
1302 | TYPE is the type field of the ".stab" symbol entry. | |
1303 | DESC is the desc field of the ".stab" entry. | |
1304 | VALU is the value field of the ".stab" entry. | |
1305 | NAME is the symbol name, in our address space. | |
1306 | OFFSET is the amount by which this object file was relocated | |
1307 | when it was loaded into memory. All symbols that refer | |
1308 | to memory locations need to be offset by this amount. | |
1309 | ||
1310 | The implicit argument is: | |
1311 | OUR_OBJFILE is the object file from which we are reading symbols. | |
1312 | It is used in end_symtab. */ | |
1313 | ||
7e258d18 | 1314 | void |
c55e6167 | 1315 | process_one_symbol (type, desc, valu, name, offset) |
bd5635a1 RP |
1316 | int type, desc; |
1317 | CORE_ADDR valu; | |
1318 | char *name; | |
c55e6167 | 1319 | int offset; |
bd5635a1 RP |
1320 | { |
1321 | #ifndef SUN_FIXED_LBRAC_BUG | |
0cf9329b | 1322 | /* This records the last pc address we've seen. We depend on there being |
bd5635a1 RP |
1323 | an SLINE or FUN or SO before the first LBRAC, since the variable does |
1324 | not get reset in between reads of different symbol files. */ | |
1325 | static CORE_ADDR last_pc_address; | |
1326 | #endif | |
1327 | register struct context_stack *new; | |
1328 | char *colon_pos; | |
1329 | ||
1330 | /* Something is wrong if we see real data before | |
1331 | seeing a source file name. */ | |
1332 | ||
1333 | if (last_source_file == 0 && type != (unsigned char)N_SO) | |
1334 | { | |
1335 | /* Currently this ignores N_ENTRY on Gould machines, N_NSYM on machines | |
1336 | where that code is defined. */ | |
1337 | if (IGNORE_SYMBOL (type)) | |
1338 | return; | |
1339 | ||
1340 | /* FIXME, this should not be an error, since it precludes extending | |
1341 | the symbol table information in this way... */ | |
1342 | error ("Invalid symbol data: does not start by identifying a source file."); | |
1343 | } | |
1344 | ||
1345 | switch (type) | |
1346 | { | |
1347 | case N_FUN: | |
1348 | case N_FNAME: | |
0bd83fd7 | 1349 | #if 0 |
3c03b5de SG |
1350 | /* It seems that the Sun ANSI C compiler (acc) replaces N_FUN with N_GSYM and |
1351 | N_STSYM with a type code of f or F. Can't enable this until we get some | |
0bd83fd7 SG |
1352 | stuff straightened out with psymtabs. */ |
1353 | ||
3c03b5de SG |
1354 | case N_GSYM: |
1355 | case N_STSYM: | |
0bd83fd7 | 1356 | #endif /* 0 */ |
3c03b5de | 1357 | |
c55e6167 JG |
1358 | valu += offset; /* Relocate for dynamic loading */ |
1359 | ||
bd5635a1 RP |
1360 | /* Either of these types of symbols indicates the start of |
1361 | a new function. We must process its "name" normally for dbx, | |
1362 | but also record the start of a new lexical context, and possibly | |
1363 | also the end of the lexical context for the previous function. */ | |
1364 | /* This is not always true. This type of symbol may indicate a | |
1365 | text segment variable. */ | |
1366 | ||
bd5635a1 RP |
1367 | colon_pos = strchr (name, ':'); |
1368 | if (!colon_pos++ | |
1369 | || (*colon_pos != 'f' && *colon_pos != 'F')) | |
1370 | { | |
021959e2 | 1371 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1372 | break; |
1373 | } | |
1374 | ||
3c03b5de SG |
1375 | #ifndef SUN_FIXED_LBRAC_BUG |
1376 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1377 | #endif | |
1378 | ||
bd5635a1 RP |
1379 | within_function = 1; |
1380 | if (context_stack_depth > 0) | |
1381 | { | |
7d9884b9 | 1382 | new = pop_context (); |
bd5635a1 RP |
1383 | /* Make a block for the local symbols within. */ |
1384 | finish_block (new->name, &local_symbols, new->old_blocks, | |
021959e2 | 1385 | new->start_addr, valu, our_objfile); |
bd5635a1 RP |
1386 | } |
1387 | /* Stack must be empty now. */ | |
1388 | if (context_stack_depth != 0) | |
021959e2 | 1389 | complain (&lbrac_unmatched_complaint, (char *) symnum); |
bd5635a1 | 1390 | |
7d9884b9 | 1391 | new = push_context (0, valu); |
021959e2 | 1392 | new->name = define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1393 | break; |
1394 | ||
1395 | case N_CATCH: | |
1396 | /* Record the address at which this catch takes place. */ | |
021959e2 | 1397 | define_symbol (valu+offset, name, desc, type, our_objfile); |
bd5635a1 RP |
1398 | break; |
1399 | ||
1400 | case N_LBRAC: | |
1401 | /* This "symbol" just indicates the start of an inner lexical | |
1402 | context within a function. */ | |
1403 | ||
c55e6167 JG |
1404 | #if defined (BLOCK_ADDRESS_ABSOLUTE) |
1405 | valu += offset; /* Relocate for dynamic loading */ | |
1406 | #else | |
bd5635a1 RP |
1407 | /* On most machines, the block addresses are relative to the |
1408 | N_SO, the linker did not relocate them (sigh). */ | |
1409 | valu += last_source_start_addr; | |
1410 | #endif | |
1411 | ||
1412 | #ifndef SUN_FIXED_LBRAC_BUG | |
1413 | if (valu < last_pc_address) { | |
1414 | /* Patch current LBRAC pc value to match last handy pc value */ | |
1415 | complain (&lbrac_complaint, 0); | |
1416 | valu = last_pc_address; | |
1417 | } | |
1418 | #endif | |
7d9884b9 | 1419 | new = push_context (desc, valu); |
bd5635a1 RP |
1420 | break; |
1421 | ||
1422 | case N_RBRAC: | |
1423 | /* This "symbol" just indicates the end of an inner lexical | |
1424 | context that was started with N_LBRAC. */ | |
1425 | ||
c55e6167 JG |
1426 | #if defined (BLOCK_ADDRESS_ABSOLUTE) |
1427 | valu += offset; /* Relocate for dynamic loading */ | |
1428 | #else | |
bd5635a1 RP |
1429 | /* On most machines, the block addresses are relative to the |
1430 | N_SO, the linker did not relocate them (sigh). */ | |
1431 | valu += last_source_start_addr; | |
1432 | #endif | |
1433 | ||
7d9884b9 | 1434 | new = pop_context(); |
bd5635a1 | 1435 | if (desc != new->depth) |
021959e2 | 1436 | complain (&lbrac_mismatch_complaint, (char *) symnum); |
bd5635a1 RP |
1437 | |
1438 | /* Some compilers put the variable decls inside of an | |
1439 | LBRAC/RBRAC block. This macro should be nonzero if this | |
1440 | is true. DESC is N_DESC from the N_RBRAC symbol. | |
0cf9329b PB |
1441 | GCC_P is true if we've detected the GCC_COMPILED_SYMBOL |
1442 | or the GCC2_COMPILED_SYMBOL. */ | |
bd5635a1 RP |
1443 | #if !defined (VARIABLES_INSIDE_BLOCK) |
1444 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 | |
1445 | #endif | |
1446 | ||
1447 | /* Can only use new->locals as local symbols here if we're in | |
1448 | gcc or on a machine that puts them before the lbrack. */ | |
1449 | if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1450 | local_symbols = new->locals; | |
1451 | ||
1452 | /* If this is not the outermost LBRAC...RBRAC pair in the | |
1453 | function, its local symbols preceded it, and are the ones | |
1454 | just recovered from the context stack. Defined the block for them. | |
1455 | ||
1456 | If this is the outermost LBRAC...RBRAC pair, there is no | |
1457 | need to do anything; leave the symbols that preceded it | |
1458 | to be attached to the function's own block. However, if | |
1459 | it is so, we need to indicate that we just moved outside | |
1460 | of the function. */ | |
1461 | if (local_symbols | |
1462 | && (context_stack_depth | |
1463 | > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))) | |
1464 | { | |
1465 | /* FIXME Muzzle a compiler bug that makes end < start. */ | |
1466 | if (new->start_addr > valu) | |
1467 | { | |
1468 | complain(&lbrac_rbrac_complaint, 0); | |
1469 | new->start_addr = valu; | |
1470 | } | |
1471 | /* Make a block for the local symbols within. */ | |
1472 | finish_block (0, &local_symbols, new->old_blocks, | |
021959e2 | 1473 | new->start_addr, valu, our_objfile); |
bd5635a1 RP |
1474 | } |
1475 | else | |
1476 | { | |
1477 | within_function = 0; | |
1478 | } | |
1479 | if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1480 | /* Now pop locals of block just finished. */ | |
1481 | local_symbols = new->locals; | |
1482 | break; | |
1483 | ||
9bb30452 | 1484 | case N_FN: |
6150cc73 | 1485 | case N_FN_SEQ: |
9bb30452 | 1486 | /* This kind of symbol indicates the start of an object file. */ |
c55e6167 | 1487 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1488 | break; |
1489 | ||
1490 | case N_SO: | |
1491 | /* This type of symbol indicates the start of data | |
1492 | for one source file. | |
1493 | Finish the symbol table of the previous source file | |
1494 | (if any) and start accumulating a new symbol table. */ | |
c55e6167 JG |
1495 | valu += offset; /* Relocate for dynamic loading */ |
1496 | ||
bd5635a1 RP |
1497 | #ifndef SUN_FIXED_LBRAC_BUG |
1498 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1499 | #endif | |
1500 | ||
1501 | #ifdef PCC_SOL_BROKEN | |
1502 | /* pcc bug, occasionally puts out SO for SOL. */ | |
1503 | if (context_stack_depth > 0) | |
1504 | { | |
1505 | start_subfile (name, NULL); | |
1506 | break; | |
1507 | } | |
1508 | #endif | |
1509 | if (last_source_file) | |
7e258d18 PB |
1510 | { |
1511 | /* Check if previous symbol was also an N_SO (with some | |
1512 | sanity checks). If so, that one was actually the directory | |
1513 | name, and the current one is the real file name. | |
1514 | Patch things up. */ | |
1515 | if (previous_stab_code == N_SO | |
1516 | && current_subfile && current_subfile->dirname == NULL | |
1517 | && current_subfile->name != NULL | |
1518 | && current_subfile->name[strlen(current_subfile->name)-1] == '/') | |
1519 | { | |
1520 | current_subfile->dirname = current_subfile->name; | |
021959e2 JG |
1521 | current_subfile->name = |
1522 | obsavestring (name, strlen (name), | |
1523 | &our_objfile -> symbol_obstack); | |
7e258d18 PB |
1524 | break; |
1525 | } | |
021959e2 | 1526 | (void) end_symtab (valu, 0, 0, our_objfile); |
7e258d18 | 1527 | } |
bd5635a1 RP |
1528 | start_symtab (name, NULL, valu); |
1529 | break; | |
1530 | ||
c55e6167 | 1531 | |
bd5635a1 RP |
1532 | case N_SOL: |
1533 | /* This type of symbol indicates the start of data for | |
1534 | a sub-source-file, one whose contents were copied or | |
1535 | included in the compilation of the main source file | |
1536 | (whose name was given in the N_SO symbol.) */ | |
c55e6167 | 1537 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1538 | start_subfile (name, NULL); |
1539 | break; | |
1540 | ||
1541 | case N_BINCL: | |
1542 | push_subfile (); | |
1543 | add_new_header_file (name, valu); | |
1544 | start_subfile (name, NULL); | |
1545 | break; | |
1546 | ||
1547 | case N_EINCL: | |
1548 | start_subfile (pop_subfile (), NULL); | |
1549 | break; | |
1550 | ||
1551 | case N_EXCL: | |
1552 | add_old_header_file (name, valu); | |
1553 | break; | |
1554 | ||
1555 | case N_SLINE: | |
1556 | /* This type of "symbol" really just records | |
1557 | one line-number -- core-address correspondence. | |
1558 | Enter it in the line list for this symbol table. */ | |
c55e6167 | 1559 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1560 | #ifndef SUN_FIXED_LBRAC_BUG |
1561 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1562 | #endif | |
4137c5fc | 1563 | record_line (current_subfile, desc, valu); |
bd5635a1 RP |
1564 | break; |
1565 | ||
1566 | case N_BCOMM: | |
1567 | if (common_block) | |
1568 | error ("Invalid symbol data: common within common at symtab pos %d", | |
1569 | symnum); | |
1570 | common_block = local_symbols; | |
1571 | common_block_i = local_symbols ? local_symbols->nsyms : 0; | |
1572 | break; | |
1573 | ||
1574 | case N_ECOMM: | |
1575 | /* Symbols declared since the BCOMM are to have the common block | |
1576 | start address added in when we know it. common_block points to | |
1577 | the first symbol after the BCOMM in the local_symbols list; | |
1578 | copy the list and hang it off the symbol for the common block name | |
1579 | for later fixup. */ | |
1580 | { | |
1581 | int i; | |
1582 | struct symbol *sym = | |
318bf84f | 1583 | (struct symbol *) xmmalloc (our_objfile -> md, sizeof (struct symbol)); |
bd5635a1 RP |
1584 | bzero (sym, sizeof *sym); |
1585 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
1586 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1587 | SYMBOL_NAMESPACE (sym) = (enum namespace)((long) | |
1588 | copy_pending (local_symbols, common_block_i, common_block)); | |
1589 | i = hashname (SYMBOL_NAME (sym)); | |
1590 | SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; | |
1591 | global_sym_chain[i] = sym; | |
1592 | common_block = 0; | |
1593 | break; | |
1594 | } | |
1595 | ||
c55e6167 JG |
1596 | /* The following symbol types need to have the offset added to their |
1597 | value; then we process symbol definitions in the name. */ | |
1598 | case N_STSYM: /* Global symbol */ | |
1599 | case N_LCSYM: /* Local symbol */ | |
1600 | case N_DSLINE: /* Source line number, data seg */ | |
1601 | case N_BSLINE: /* Source line number, bss seg */ | |
1602 | /* N_BROWS: overlaps with N_BSLINE */ | |
1603 | case N_ENTRY: /* Alternate entry point */ | |
1604 | valu += offset; /* Relocate for dynamic loading */ | |
1605 | /* FALL THROUGH */ | |
1606 | ||
1607 | /* The following symbol types don't need the address field relocated, | |
1608 | since it is either unused, or is absolute. */ | |
1609 | case N_GSYM: /* Global variable */ | |
1610 | case N_NSYMS: /* Number of symbols (ultrix) */ | |
1611 | case N_NOMAP: /* No map? (ultrix) */ | |
1612 | case N_RSYM: /* Register variable */ | |
1613 | case N_DEFD: /* Modula-2 GNU module dependency */ | |
1614 | case N_SSYM: /* Struct or union element */ | |
1615 | case N_LSYM: /* Local symbol in stack */ | |
1616 | case N_PSYM: /* Parameter variable */ | |
1617 | case N_LENG: /* Length of preceding symbol type */ | |
1618 | if (name) | |
021959e2 | 1619 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1620 | break; |
1621 | ||
c55e6167 JG |
1622 | /* The following symbol types we don't know how to process. Handle |
1623 | them in a "default" way, but complain to people who care. */ | |
bd5635a1 | 1624 | default: |
c55e6167 JG |
1625 | case N_EHDECL: /* Exception handler name */ |
1626 | case N_MAIN: /* Name of main routine (not used in C) */ | |
1627 | case N_PC: /* Global symbol in Pascal */ | |
1628 | case N_M2C: /* Modula-2 compilation unit */ | |
1629 | /* N_MOD2: overlaps with N_EHDECL */ | |
1630 | case N_SCOPE: /* Modula-2 scope information */ | |
1631 | case N_ECOML: /* End common (local name) */ | |
1632 | case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ | |
1633 | case N_NBDATA: | |
1634 | case N_NBBSS: | |
1635 | case N_NBSTS: | |
1636 | case N_NBLCS: | |
1637 | complain (&unknown_symtype_complaint, local_hex_string(type)); | |
bd5635a1 | 1638 | if (name) |
021959e2 | 1639 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 | 1640 | } |
7e258d18 PB |
1641 | |
1642 | previous_stab_code = type; | |
bd5635a1 RP |
1643 | } |
1644 | \f | |
bd5635a1 RP |
1645 | /* Copy a pending list, used to record the contents of a common |
1646 | block for later fixup. */ | |
1647 | static struct pending * | |
1648 | copy_pending (beg, begi, end) | |
021959e2 | 1649 | struct pending *beg; |
bd5635a1 | 1650 | int begi; |
021959e2 | 1651 | struct pending *end; |
bd5635a1 RP |
1652 | { |
1653 | struct pending *new = 0; | |
1654 | struct pending *next; | |
1655 | ||
1656 | for (next = beg; next != 0 && (next != end || begi < end->nsyms); | |
1657 | next = next->next, begi = 0) | |
1658 | { | |
1659 | register int j; | |
1660 | for (j = begi; j < next->nsyms; j++) | |
1661 | add_symbol_to_list (next->symbol[j], &new); | |
1662 | } | |
1663 | return new; | |
1664 | } | |
bd5635a1 RP |
1665 | \f |
1666 | /* Register our willingness to decode symbols for SunOS and a.out and | |
1667 | b.out files handled by BFD... */ | |
1668 | static struct sym_fns sunos_sym_fns = {"sunOs", 6, | |
9404978d | 1669 | dbx_new_init, dbx_symfile_init, dbx_symfile_read}; |
bd5635a1 RP |
1670 | |
1671 | static struct sym_fns aout_sym_fns = {"a.out", 5, | |
9404978d | 1672 | dbx_new_init, dbx_symfile_init, dbx_symfile_read}; |
bd5635a1 RP |
1673 | |
1674 | static struct sym_fns bout_sym_fns = {"b.out", 5, | |
9404978d | 1675 | dbx_new_init, dbx_symfile_init, dbx_symfile_read}; |
bd5635a1 RP |
1676 | |
1677 | void | |
1678 | _initialize_dbxread () | |
1679 | { | |
1680 | add_symtab_fns(&sunos_sym_fns); | |
1681 | add_symtab_fns(&aout_sym_fns); | |
1682 | add_symtab_fns(&bout_sym_fns); | |
bd5635a1 | 1683 | } |