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" | |
3624c875 | 58 | #include "objfiles.h" |
c0302457 | 59 | #include "buildsym.h" |
afe4ca15 | 60 | |
7e258d18 PB |
61 | #include "aout/aout64.h" |
62 | #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */ | |
bd5635a1 | 63 | |
c0302457 JG |
64 | /* Information is passed among various dbxread routines for accessing |
65 | symbol files. A pointer to this structure is kept in the sym_private | |
3624c875 | 66 | field of the objfile struct. */ |
c0302457 | 67 | |
bd5635a1 RP |
68 | struct dbx_symfile_info { |
69 | asection *text_sect; /* Text section accessor */ | |
70 | int symcount; /* How many symbols are there in the file */ | |
71 | char *stringtab; /* The actual string table */ | |
72 | int stringtab_size; /* Its size */ | |
73 | off_t symtab_offset; /* Offset in file to symbol table */ | |
bd5635a1 RP |
74 | }; |
75 | ||
3624c875 FF |
76 | #define DBX_SYMFILE_INFO(o) ((struct dbx_symfile_info *)((o)->sym_private)) |
77 | #define DBX_TEXT_SECT(o) (DBX_SYMFILE_INFO(o)->text_sect) | |
78 | #define DBX_SYMCOUNT(o) (DBX_SYMFILE_INFO(o)->symcount) | |
79 | #define DBX_STRINGTAB(o) (DBX_SYMFILE_INFO(o)->stringtab) | |
80 | #define DBX_STRINGTAB_SIZE(o) (DBX_SYMFILE_INFO(o)->stringtab_size) | |
81 | #define DBX_SYMTAB_OFFSET(o) (DBX_SYMFILE_INFO(o)->symtab_offset) | |
c0302457 | 82 | |
4a35d6e9 FF |
83 | /* Each partial symbol table entry contains a pointer to private data for the |
84 | read_symtab() function to use when expanding a partial symbol table entry | |
85 | to a full symbol table entry. | |
86 | ||
87 | For dbxread this structure contains the offset within the file symbol table | |
88 | of first local symbol for this file, and length (in bytes) of the section | |
89 | of the symbol table devoted to this file's symbols (actually, the section | |
90 | bracketed may contain more than just this file's symbols). If ldsymlen is | |
91 | 0, the only reason for this thing's existence is the dependency list. | |
92 | Nothing else will happen when it is read in. */ | |
93 | ||
94 | #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff) | |
95 | #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen) | |
96 | ||
97 | struct symloc { | |
98 | int ldsymoff; | |
99 | int ldsymlen; | |
100 | }; | |
101 | ||
bd5635a1 RP |
102 | /* Macro to determine which symbols to ignore when reading the first symbol |
103 | of a file. Some machines override this definition. */ | |
104 | #ifndef IGNORE_SYMBOL | |
105 | /* This code is used on Ultrix systems. Ignore it */ | |
106 | #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS) | |
107 | #endif | |
108 | ||
109 | /* Macro for name of symbol to indicate a file compiled with gcc. */ | |
110 | #ifndef GCC_COMPILED_FLAG_SYMBOL | |
111 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." | |
112 | #endif | |
113 | ||
0cf9329b PB |
114 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
115 | #ifndef GCC2_COMPILED_FLAG_SYMBOL | |
116 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." | |
117 | #endif | |
118 | ||
bd5635a1 RP |
119 | /* Define this as 1 if a pcc declaration of a char or short argument |
120 | gives the correct address. Otherwise assume pcc gives the | |
121 | address of the corresponding int, which is not the same on a | |
122 | big-endian machine. */ | |
123 | ||
124 | #ifndef BELIEVE_PCC_PROMOTION | |
125 | #define BELIEVE_PCC_PROMOTION 0 | |
126 | #endif | |
c0302457 | 127 | |
bd5635a1 RP |
128 | /* Nonzero means give verbose info on gdb action. From main.c. */ |
129 | extern int info_verbose; | |
130 | ||
7d9884b9 | 131 | /* The BFD for this file -- implicit parameter to next_symbol_text. */ |
bd5635a1 | 132 | |
c0302457 | 133 | static bfd *symfile_bfd; |
bd5635a1 | 134 | |
7d9884b9 JG |
135 | /* The objfile for this file -- only good in process_one_symbol(). */ |
136 | ||
137 | static struct objfile *our_objfile; | |
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 | |
80d68b1d FF |
185 | free_header_files PARAMS ((void)); |
186 | ||
187 | static void | |
188 | init_header_files PARAMS ((void)); | |
021959e2 JG |
189 | |
190 | static struct pending * | |
191 | copy_pending PARAMS ((struct pending *, int, struct pending *)); | |
192 | ||
193 | static struct symtab * | |
3624c875 | 194 | read_ofile_symtab PARAMS ((struct objfile *, int, int, CORE_ADDR, int, int)); |
021959e2 JG |
195 | |
196 | static void | |
197 | dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
198 | ||
199 | static void | |
3624c875 | 200 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *, int)); |
021959e2 JG |
201 | |
202 | static void | |
3624c875 | 203 | read_dbx_symtab PARAMS ((CORE_ADDR, struct objfile *, CORE_ADDR, int)); |
021959e2 JG |
204 | |
205 | static void | |
206 | free_bincl_list PARAMS ((struct objfile *)); | |
207 | ||
208 | static struct partial_symtab * | |
209 | find_corresponding_bincl_psymtab PARAMS ((char *, int)); | |
210 | ||
211 | static void | |
212 | add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int)); | |
213 | ||
214 | static void | |
215 | init_bincl_list PARAMS ((int, struct objfile *)); | |
216 | ||
217 | static void | |
3624c875 | 218 | init_psymbol_list PARAMS ((struct objfile *)); |
021959e2 JG |
219 | |
220 | static char * | |
221 | dbx_next_symbol_text PARAMS ((void)); | |
222 | ||
223 | static void | |
224 | fill_symbuf PARAMS ((bfd *)); | |
225 | ||
226 | static void | |
80d68b1d FF |
227 | dbx_symfile_init PARAMS ((struct objfile *)); |
228 | ||
229 | static void | |
230 | dbx_new_init PARAMS ((struct objfile *)); | |
021959e2 JG |
231 | |
232 | static void | |
80d68b1d | 233 | dbx_symfile_read PARAMS ((struct objfile *, CORE_ADDR, int)); |
021959e2 JG |
234 | |
235 | static void | |
80d68b1d | 236 | dbx_symfile_finish PARAMS ((struct objfile *)); |
021959e2 JG |
237 | |
238 | static void | |
239 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *)); | |
240 | ||
241 | static void | |
242 | add_new_header_file PARAMS ((char *, int)); | |
243 | ||
244 | static void | |
245 | add_old_header_file PARAMS ((char *, int)); | |
246 | ||
247 | static void | |
248 | add_this_object_header_file PARAMS ((int)); | |
249 | ||
80d68b1d | 250 | /* Free up old header file tables */ |
bd5635a1 | 251 | |
021959e2 | 252 | static void |
80d68b1d | 253 | free_header_files () |
bd5635a1 RP |
254 | { |
255 | register int i; | |
bd5635a1 | 256 | |
80d68b1d FF |
257 | if (header_files != NULL) |
258 | { | |
259 | for (i = 0; i < n_header_files; i++) | |
260 | { | |
261 | free (header_files[i].name); | |
262 | } | |
263 | free (header_files); | |
264 | header_files = NULL; | |
265 | n_header_files = 0; | |
266 | } | |
267 | if (this_object_header_files) | |
268 | { | |
269 | free (this_object_header_files); | |
270 | this_object_header_files = NULL; | |
271 | } | |
272 | n_allocated_header_files = 0; | |
273 | n_allocated_this_object_header_files = 0; | |
274 | } | |
275 | ||
276 | /* Allocate new header file tables */ | |
277 | ||
278 | static void | |
279 | init_header_files () | |
280 | { | |
bd5635a1 | 281 | n_header_files = 0; |
80d68b1d FF |
282 | n_allocated_header_files = 10; |
283 | header_files = (struct header_file *) | |
284 | xmalloc (10 * sizeof (struct header_file)); | |
bd5635a1 RP |
285 | |
286 | n_allocated_this_object_header_files = 10; | |
287 | this_object_header_files = (int *) xmalloc (10 * sizeof (int)); | |
288 | } | |
289 | ||
bd5635a1 RP |
290 | /* Add header file number I for this object file |
291 | at the next successive FILENUM. */ | |
292 | ||
293 | static void | |
294 | add_this_object_header_file (i) | |
295 | int i; | |
296 | { | |
297 | if (n_this_object_header_files == n_allocated_this_object_header_files) | |
298 | { | |
299 | n_allocated_this_object_header_files *= 2; | |
300 | this_object_header_files | |
021959e2 | 301 | = (int *) xrealloc ((char *) this_object_header_files, |
bd5635a1 RP |
302 | n_allocated_this_object_header_files * sizeof (int)); |
303 | } | |
304 | ||
305 | this_object_header_files[n_this_object_header_files++] = i; | |
306 | } | |
307 | ||
308 | /* Add to this file an "old" header file, one already seen in | |
309 | a previous object file. NAME is the header file's name. | |
310 | INSTANCE is its instance code, to select among multiple | |
311 | symbol tables for the same header file. */ | |
312 | ||
313 | static void | |
314 | add_old_header_file (name, instance) | |
315 | char *name; | |
316 | int instance; | |
317 | { | |
318 | register struct header_file *p = header_files; | |
319 | register int i; | |
320 | ||
321 | for (i = 0; i < n_header_files; i++) | |
322 | if (!strcmp (p[i].name, name) && instance == p[i].instance) | |
323 | { | |
324 | add_this_object_header_file (i); | |
325 | return; | |
326 | } | |
327 | error ("Invalid symbol data: \"repeated\" header file that hasn't been seen before, at symtab pos %d.", | |
328 | symnum); | |
329 | } | |
330 | ||
331 | /* Add to this file a "new" header file: definitions for its types follow. | |
332 | NAME is the header file's name. | |
333 | Most often this happens only once for each distinct header file, | |
334 | but not necessarily. If it happens more than once, INSTANCE has | |
335 | a different value each time, and references to the header file | |
336 | use INSTANCE values to select among them. | |
337 | ||
338 | dbx output contains "begin" and "end" markers for each new header file, | |
339 | but at this level we just need to know which files there have been; | |
340 | so we record the file when its "begin" is seen and ignore the "end". */ | |
341 | ||
342 | static void | |
343 | add_new_header_file (name, instance) | |
344 | char *name; | |
345 | int instance; | |
346 | { | |
347 | register int i; | |
348 | header_file_prev_index = -1; | |
349 | ||
350 | /* Make sure there is room for one more header file. */ | |
351 | ||
352 | if (n_header_files == n_allocated_header_files) | |
353 | { | |
354 | n_allocated_header_files *= 2; | |
355 | header_files = (struct header_file *) | |
021959e2 JG |
356 | xrealloc ((char *) header_files, |
357 | (n_allocated_header_files * sizeof (struct header_file))); | |
bd5635a1 RP |
358 | } |
359 | ||
360 | /* Create an entry for this header file. */ | |
361 | ||
362 | i = n_header_files++; | |
363 | header_files[i].name = savestring (name, strlen(name)); | |
364 | header_files[i].instance = instance; | |
365 | header_files[i].length = 10; | |
366 | header_files[i].vector | |
367 | = (struct type **) xmalloc (10 * sizeof (struct type *)); | |
368 | bzero (header_files[i].vector, 10 * sizeof (struct type *)); | |
369 | ||
370 | add_this_object_header_file (i); | |
371 | } | |
372 | ||
bd5635a1 RP |
373 | #if 0 |
374 | static struct type ** | |
375 | explicit_lookup_type (real_filenum, index) | |
376 | int real_filenum, index; | |
377 | { | |
378 | register struct header_file *f = &header_files[real_filenum]; | |
379 | ||
380 | if (index >= f->length) | |
381 | { | |
382 | f->length *= 2; | |
383 | f->vector = (struct type **) | |
384 | xrealloc (f->vector, f->length * sizeof (struct type *)); | |
385 | bzero (&f->vector[f->length / 2], | |
386 | f->length * sizeof (struct type *) / 2); | |
387 | } | |
388 | return &f->vector[index]; | |
389 | } | |
390 | #endif | |
391 | \f | |
9bba3334 | 392 | static void |
021959e2 | 393 | record_minimal_symbol (name, address, type, objfile) |
bd5635a1 RP |
394 | char *name; |
395 | CORE_ADDR address; | |
396 | int type; | |
021959e2 | 397 | struct objfile *objfile; |
bd5635a1 | 398 | { |
021959e2 | 399 | enum minimal_symbol_type ms_type; |
0c4d2cc2 JG |
400 | |
401 | switch (type &~ N_EXT) { | |
021959e2 JG |
402 | case N_TEXT: ms_type = mst_text; break; |
403 | case N_DATA: ms_type = mst_data; break; | |
404 | case N_BSS: ms_type = mst_bss; break; | |
405 | case N_ABS: ms_type = mst_abs; break; | |
0c4d2cc2 | 406 | #ifdef N_SETV |
021959e2 | 407 | case N_SETV: ms_type = mst_data; break; |
0c4d2cc2 | 408 | #endif |
021959e2 | 409 | default: ms_type = mst_unknown; break; |
0c4d2cc2 | 410 | } |
bd5635a1 | 411 | |
021959e2 JG |
412 | prim_record_minimal_symbol (obsavestring (name, strlen (name), &objfile -> symbol_obstack), |
413 | address, ms_type); | |
bd5635a1 RP |
414 | } |
415 | \f | |
416 | /* Scan and build partial symbols for a symbol file. | |
417 | We have been initialized by a call to dbx_symfile_init, which | |
3624c875 FF |
418 | put all the relevant info into a "struct dbx_symfile_info", |
419 | hung off the objfile structure. | |
bd5635a1 RP |
420 | |
421 | ADDR is the address relative to which the symbols in it are (e.g. | |
422 | the base address of the text segment). | |
423 | MAINLINE is true if we are reading the main symbol | |
424 | table (as opposed to a shared lib or dynamically loaded file). */ | |
425 | ||
9bba3334 | 426 | static void |
80d68b1d FF |
427 | dbx_symfile_read (objfile, addr, mainline) |
428 | struct objfile *objfile; | |
bd5635a1 RP |
429 | CORE_ADDR addr; |
430 | int mainline; /* FIXME comments above */ | |
431 | { | |
80d68b1d | 432 | bfd *sym_bfd; |
bd5635a1 | 433 | int val; |
bd5635a1 | 434 | |
80d68b1d | 435 | sym_bfd = objfile->obfd; |
3624c875 | 436 | val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), L_SET); |
bd5635a1 | 437 | if (val < 0) |
80d68b1d | 438 | perror_with_name (objfile->name); |
bd5635a1 | 439 | |
66eeea27 | 440 | /* If we are reinitializing, or if we have never loaded syms yet, init */ |
80d68b1d | 441 | if (mainline || objfile->global_psymbols.size == 0 || objfile->static_psymbols.size == 0) |
3624c875 | 442 | init_psymbol_list (objfile); |
66eeea27 | 443 | |
afe4ca15 JG |
444 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
445 | symbol_size = obj_symbol_entry_size (sym_bfd); | |
446 | ||
bd5635a1 RP |
447 | pending_blocks = 0; |
448 | make_cleanup (really_free_pendings, 0); | |
449 | ||
021959e2 JG |
450 | init_minimal_symbol_collection (); |
451 | make_cleanup (discard_minimal_symbols, 0); | |
bd5635a1 RP |
452 | |
453 | /* Now that the symbol table data of the executable file are all in core, | |
454 | process them and define symbols accordingly. */ | |
455 | ||
3624c875 FF |
456 | addr -= bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)); /*offset*/ |
457 | read_dbx_symtab (addr, objfile, | |
458 | bfd_section_vma (sym_bfd, DBX_TEXT_SECT (objfile)), | |
459 | bfd_section_size (sym_bfd, DBX_TEXT_SECT (objfile))); | |
bd5635a1 | 460 | |
021959e2 JG |
461 | /* Install any minimal symbols that have been collected as the current |
462 | minimal symbols for this objfile. */ | |
bd5635a1 | 463 | |
80d68b1d | 464 | install_minimal_symbols (objfile); |
bd5635a1 | 465 | |
021959e2 | 466 | if (!have_partial_symbols ()) { |
9404978d MT |
467 | wrap_here (""); |
468 | printf_filtered ("(no debugging symbols found)..."); | |
469 | wrap_here (""); | |
470 | } | |
bd5635a1 RP |
471 | } |
472 | ||
9404978d MT |
473 | /* Initialize anything that needs initializing when a completely new |
474 | symbol file is specified (not just adding some symbols from another | |
475 | file, e.g. a shared library). */ | |
bd5635a1 | 476 | |
9bba3334 | 477 | static void |
80d68b1d FF |
478 | dbx_new_init (objfile) |
479 | struct objfile *objfile; | |
bd5635a1 | 480 | { |
c0302457 | 481 | buildsym_new_init (); |
80d68b1d | 482 | init_header_files (); |
bd5635a1 RP |
483 | } |
484 | ||
485 | ||
486 | /* dbx_symfile_init () | |
487 | is the dbx-specific initialization routine for reading symbols. | |
80d68b1d | 488 | It is passed a struct objfile which contains, among other things, |
bd5635a1 RP |
489 | the BFD for the file whose symbols are being read, and a slot for a pointer |
490 | to "private data" which we fill with goodies. | |
491 | ||
492 | We read the string table into malloc'd space and stash a pointer to it. | |
493 | ||
494 | Since BFD doesn't know how to read debug symbols in a format-independent | |
495 | way (and may never do so...), we have to do it ourselves. We will never | |
496 | be called unless this is an a.out (or very similar) file. | |
497 | FIXME, there should be a cleaner peephole into the BFD environment here. */ | |
498 | ||
9bba3334 | 499 | static void |
80d68b1d FF |
500 | dbx_symfile_init (objfile) |
501 | struct objfile *objfile; | |
bd5635a1 RP |
502 | { |
503 | int val; | |
80d68b1d | 504 | bfd *sym_bfd = objfile->obfd; |
bd5635a1 | 505 | char *name = bfd_get_filename (sym_bfd); |
bd5635a1 RP |
506 | unsigned char size_temp[4]; |
507 | ||
508 | /* Allocate struct to keep track of the symfile */ | |
3624c875 FF |
509 | DBX_SYMFILE_INFO (objfile) = (struct dbx_symfile_info *) |
510 | xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); | |
bd5635a1 RP |
511 | |
512 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
bd5635a1 RP |
513 | #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd)) |
514 | #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd)) | |
515 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
516 | ||
3624c875 FF |
517 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text"); |
518 | if (!DBX_TEXT_SECT (objfile)) | |
bd5635a1 | 519 | abort(); |
3624c875 FF |
520 | DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd); |
521 | ||
522 | /* Read the string table and stash it away in the psymbol_obstack. It is | |
523 | only needed as long as we need to expand psymbols into full symbols, | |
524 | so when we blow away the psymbol the string table goes away as well. | |
525 | Note that gdb used to use the results of attempting to malloc the | |
526 | string table, based on the size it read, as a form of sanity check | |
527 | for botched byte swapping, on the theory that a byte swapped string | |
528 | table size would be so totally bogus that the malloc would fail. Now | |
529 | that we put in on the psymbol_obstack, we can't do this since gdb gets | |
530 | a fatal error (out of virtual memory) if the size is bogus. We can | |
531 | however at least check to see if the size is zero or some negative | |
532 | value. */ | |
bd5635a1 | 533 | |
7d9884b9 | 534 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 | 535 | if (val < 0) |
3624c875 | 536 | perror_with_name (name); |
bd5635a1 | 537 | |
7d9884b9 | 538 | val = bfd_read (size_temp, sizeof (long), 1, sym_bfd); |
bd5635a1 | 539 | if (val < 0) |
3624c875 FF |
540 | perror_with_name (name); |
541 | ||
542 | DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp); | |
543 | if (DBX_STRINGTAB_SIZE (objfile) <= 0) | |
544 | error ("ridiculous string table size (%d bytes).", | |
545 | DBX_STRINGTAB_SIZE (objfile)); | |
546 | ||
547 | DBX_STRINGTAB (objfile) = | |
548 | (char *) obstack_alloc (&objfile -> psymbol_obstack, | |
549 | DBX_STRINGTAB_SIZE (objfile)); | |
bd5635a1 RP |
550 | |
551 | /* Now read in the string table in one big gulp. */ | |
552 | ||
7d9884b9 | 553 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); |
bd5635a1 RP |
554 | if (val < 0) |
555 | perror_with_name (name); | |
3624c875 FF |
556 | val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, |
557 | sym_bfd); | |
558 | if (val != DBX_STRINGTAB_SIZE (objfile)) | |
bd5635a1 RP |
559 | perror_with_name (name); |
560 | ||
561 | /* Record the position of the symbol table for later use. */ | |
562 | ||
3624c875 | 563 | DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; |
bd5635a1 | 564 | } |
80d68b1d FF |
565 | |
566 | /* Perform any local cleanups required when we are done with a particular | |
567 | objfile. I.E, we are in the process of discarding all symbol information | |
568 | for an objfile, freeing up all memory held for it, and unlinking the | |
569 | objfile struct from the global list of known objfiles. */ | |
570 | ||
571 | static void | |
572 | dbx_symfile_finish (objfile) | |
573 | struct objfile *objfile; | |
574 | { | |
3624c875 | 575 | if (DBX_SYMFILE_INFO (objfile) != NULL) |
80d68b1d | 576 | { |
3624c875 | 577 | mfree (objfile -> md, DBX_SYMFILE_INFO (objfile)); |
80d68b1d FF |
578 | } |
579 | free_header_files (); | |
580 | } | |
581 | ||
bd5635a1 RP |
582 | \f |
583 | /* Buffer for reading the symbol table entries. */ | |
afe4ca15 | 584 | static struct internal_nlist symbuf[4096]; |
bd5635a1 RP |
585 | static int symbuf_idx; |
586 | static int symbuf_end; | |
587 | ||
bd5635a1 RP |
588 | /* The address in memory of the string table of the object file we are |
589 | reading (which might not be the "main" object file, but might be a | |
590 | shared library or some other dynamically loaded thing). This is set | |
591 | by read_dbx_symtab when building psymtabs, and by read_ofile_symtab | |
592 | when building symtabs, and is used only by next_symbol_text. */ | |
593 | static char *stringtab_global; | |
594 | ||
595 | /* Refill the symbol table input buffer | |
596 | and set the variables that control fetching entries from it. | |
597 | Reports an error if no data available. | |
598 | This function can read past the end of the symbol table | |
599 | (into the string table) but this does no harm. */ | |
600 | ||
7d9884b9 JG |
601 | static void |
602 | fill_symbuf (sym_bfd) | |
603 | bfd *sym_bfd; | |
bd5635a1 | 604 | { |
7d9884b9 | 605 | int nbytes = bfd_read (symbuf, sizeof (symbuf), 1, sym_bfd); |
bd5635a1 | 606 | if (nbytes < 0) |
7d9884b9 | 607 | perror_with_name (bfd_get_filename (sym_bfd)); |
bd5635a1 RP |
608 | else if (nbytes == 0) |
609 | error ("Premature end of file reading symbol table"); | |
afe4ca15 | 610 | symbuf_end = nbytes / symbol_size; |
bd5635a1 | 611 | symbuf_idx = 0; |
bd5635a1 RP |
612 | } |
613 | ||
7d9884b9 | 614 | #define SWAP_SYMBOL(symp, abfd) \ |
bd5635a1 | 615 | { \ |
7d9884b9 | 616 | (symp)->n_strx = bfd_h_get_32(abfd, \ |
afe4ca15 | 617 | (unsigned char *)&(symp)->n_strx); \ |
7d9884b9 | 618 | (symp)->n_desc = bfd_h_get_16 (abfd, \ |
bd5635a1 | 619 | (unsigned char *)&(symp)->n_desc); \ |
7d9884b9 | 620 | (symp)->n_value = bfd_h_get_32 (abfd, \ |
bd5635a1 RP |
621 | (unsigned char *)&(symp)->n_value); \ |
622 | } | |
623 | ||
624 | /* Invariant: The symbol pointed to by symbuf_idx is the first one | |
625 | that hasn't been swapped. Swap the symbol at the same time | |
626 | that symbuf_idx is incremented. */ | |
627 | ||
628 | /* dbx allows the text of a symbol name to be continued into the | |
629 | next symbol name! When such a continuation is encountered | |
630 | (a \ at the end of the text of a name) | |
631 | call this function to get the continuation. */ | |
632 | ||
021959e2 | 633 | static char * |
aab77d5f | 634 | dbx_next_symbol_text () |
bd5635a1 RP |
635 | { |
636 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 637 | fill_symbuf (symfile_bfd); |
bd5635a1 | 638 | symnum++; |
7d9884b9 | 639 | SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd); |
afe4ca15 | 640 | return symbuf[symbuf_idx++].n_strx + stringtab_global; |
bd5635a1 RP |
641 | } |
642 | \f | |
643 | /* Initializes storage for all of the partial symbols that will be | |
644 | created by read_dbx_symtab and subsidiaries. */ | |
645 | ||
646 | static void | |
3624c875 | 647 | init_psymbol_list (objfile) |
021959e2 | 648 | struct objfile *objfile; |
bd5635a1 RP |
649 | { |
650 | /* Free any previously allocated psymbol lists. */ | |
021959e2 | 651 | if (objfile -> global_psymbols.list) |
318bf84f | 652 | mfree (objfile -> md, objfile -> global_psymbols.list); |
021959e2 | 653 | if (objfile -> static_psymbols.list) |
318bf84f | 654 | mfree (objfile -> md, objfile -> static_psymbols.list); |
bd5635a1 RP |
655 | |
656 | /* Current best guess is that there are approximately a twentieth | |
657 | of the total symbols (in a debugging file) are global or static | |
658 | oriented symbols */ | |
3624c875 FF |
659 | objfile -> global_psymbols.size = DBX_SYMCOUNT (objfile) / 10; |
660 | objfile -> static_psymbols.size = DBX_SYMCOUNT (objfile) / 10; | |
021959e2 | 661 | objfile -> global_psymbols.next = objfile -> global_psymbols.list = (struct partial_symbol *) |
318bf84f | 662 | xmmalloc (objfile -> md, objfile -> global_psymbols.size * sizeof (struct partial_symbol)); |
021959e2 | 663 | objfile -> static_psymbols.next = objfile -> static_psymbols.list = (struct partial_symbol *) |
318bf84f | 664 | xmmalloc (objfile -> md, objfile -> static_psymbols.size * sizeof (struct partial_symbol)); |
bd5635a1 RP |
665 | } |
666 | ||
667 | /* Initialize the list of bincls to contain none and have some | |
668 | allocated. */ | |
669 | ||
670 | static void | |
021959e2 | 671 | init_bincl_list (number, objfile) |
bd5635a1 | 672 | int number; |
021959e2 | 673 | struct objfile *objfile; |
bd5635a1 RP |
674 | { |
675 | bincls_allocated = number; | |
676 | next_bincl = bincl_list = (struct header_file_location *) | |
318bf84f | 677 | xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location)); |
bd5635a1 RP |
678 | } |
679 | ||
680 | /* Add a bincl to the list. */ | |
681 | ||
682 | static void | |
683 | add_bincl_to_list (pst, name, instance) | |
684 | struct partial_symtab *pst; | |
685 | char *name; | |
686 | int instance; | |
687 | { | |
688 | if (next_bincl >= bincl_list + bincls_allocated) | |
689 | { | |
690 | int offset = next_bincl - bincl_list; | |
691 | bincls_allocated *= 2; | |
692 | bincl_list = (struct header_file_location *) | |
318bf84f | 693 | xmrealloc (pst->objfile->md, (char *)bincl_list, |
bd5635a1 RP |
694 | bincls_allocated * sizeof (struct header_file_location)); |
695 | next_bincl = bincl_list + offset; | |
696 | } | |
697 | next_bincl->pst = pst; | |
698 | next_bincl->instance = instance; | |
699 | next_bincl++->name = name; | |
700 | } | |
701 | ||
702 | /* Given a name, value pair, find the corresponding | |
703 | bincl in the list. Return the partial symtab associated | |
704 | with that header_file_location. */ | |
705 | ||
9bba3334 | 706 | static struct partial_symtab * |
bd5635a1 RP |
707 | find_corresponding_bincl_psymtab (name, instance) |
708 | char *name; | |
709 | int instance; | |
710 | { | |
711 | struct header_file_location *bincl; | |
712 | ||
713 | for (bincl = bincl_list; bincl < next_bincl; bincl++) | |
714 | if (bincl->instance == instance | |
715 | && !strcmp (name, bincl->name)) | |
716 | return bincl->pst; | |
717 | ||
718 | return (struct partial_symtab *) 0; | |
719 | } | |
720 | ||
721 | /* Free the storage allocated for the bincl list. */ | |
722 | ||
723 | static void | |
021959e2 JG |
724 | free_bincl_list (objfile) |
725 | struct objfile *objfile; | |
bd5635a1 | 726 | { |
318bf84f | 727 | mfree (objfile -> md, bincl_list); |
bd5635a1 RP |
728 | bincls_allocated = 0; |
729 | } | |
730 | ||
bd5635a1 RP |
731 | /* Given pointers to an a.out symbol table in core containing dbx |
732 | style data, setup partial_symtab's describing each source file for | |
3624c875 FF |
733 | which debugging information is available. |
734 | SYMFILE_NAME is the name of the file we are reading from | |
bd5635a1 RP |
735 | and ADDR is its relocated address (if incremental) or 0 (if not). */ |
736 | ||
737 | static void | |
3624c875 | 738 | read_dbx_symtab (addr, objfile, text_addr, text_size) |
bd5635a1 | 739 | CORE_ADDR addr; |
7d9884b9 | 740 | struct objfile *objfile; |
bd5635a1 RP |
741 | CORE_ADDR text_addr; |
742 | int text_size; | |
743 | { | |
afe4ca15 | 744 | register struct internal_nlist *bufp; |
bd5635a1 | 745 | register char *namestring; |
bd5635a1 RP |
746 | int nsl; |
747 | int past_first_source_file = 0; | |
748 | CORE_ADDR last_o_file_start = 0; | |
749 | struct cleanup *old_chain; | |
7d9884b9 | 750 | bfd *abfd; |
bd5635a1 RP |
751 | |
752 | /* End of the text segment of the executable file. */ | |
753 | CORE_ADDR end_of_text_addr; | |
754 | ||
755 | /* Current partial symtab */ | |
756 | struct partial_symtab *pst; | |
757 | ||
758 | /* List of current psymtab's include files */ | |
759 | char **psymtab_include_list; | |
760 | int includes_allocated; | |
761 | int includes_used; | |
762 | ||
763 | /* Index within current psymtab dependency list */ | |
764 | struct partial_symtab **dependency_list; | |
765 | int dependencies_used, dependencies_allocated; | |
766 | ||
3624c875 | 767 | stringtab_global = DBX_STRINGTAB (objfile); |
bd5635a1 RP |
768 | |
769 | pst = (struct partial_symtab *) 0; | |
770 | ||
771 | includes_allocated = 30; | |
772 | includes_used = 0; | |
773 | psymtab_include_list = (char **) alloca (includes_allocated * | |
774 | sizeof (char *)); | |
775 | ||
776 | dependencies_allocated = 30; | |
777 | dependencies_used = 0; | |
778 | dependency_list = | |
779 | (struct partial_symtab **) alloca (dependencies_allocated * | |
780 | sizeof (struct partial_symtab *)); | |
781 | ||
7d9884b9 | 782 | old_chain = make_cleanup (free_objfile, objfile); |
bd5635a1 RP |
783 | |
784 | /* Init bincl list */ | |
021959e2 JG |
785 | init_bincl_list (20, objfile); |
786 | make_cleanup (free_bincl_list, objfile); | |
bd5635a1 RP |
787 | |
788 | last_source_file = 0; | |
789 | ||
790 | #ifdef END_OF_TEXT_DEFAULT | |
791 | end_of_text_addr = END_OF_TEXT_DEFAULT; | |
792 | #else | |
5bc757e2 | 793 | end_of_text_addr = text_addr + addr + text_size; /* Relocate */ |
bd5635a1 RP |
794 | #endif |
795 | ||
7d9884b9 JG |
796 | symfile_bfd = objfile->obfd; /* For next_text_symbol */ |
797 | abfd = objfile->obfd; | |
bd5635a1 | 798 | symbuf_end = symbuf_idx = 0; |
aab77d5f | 799 | next_symbol_text_func = dbx_next_symbol_text; |
bd5635a1 | 800 | |
3624c875 | 801 | for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++) |
bd5635a1 RP |
802 | { |
803 | /* Get the symbol for this run and pull out some info */ | |
804 | QUIT; /* allow this to be interruptable */ | |
805 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 806 | fill_symbuf (abfd); |
bd5635a1 RP |
807 | bufp = &symbuf[symbuf_idx++]; |
808 | ||
809 | /* | |
810 | * Special case to speed up readin. | |
811 | */ | |
812 | if (bufp->n_type == (unsigned char)N_SLINE) continue; | |
813 | ||
7d9884b9 | 814 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 RP |
815 | |
816 | /* Ok. There is a lot of code duplicated in the rest of this | |
817 | switch statement (for efficiency reasons). Since I don't | |
818 | like duplicating code, I will do my penance here, and | |
819 | describe the code which is duplicated: | |
820 | ||
821 | *) The assignment to namestring. | |
822 | *) The call to strchr. | |
823 | *) The addition of a partial symbol the the two partial | |
824 | symbol lists. This last is a large section of code, so | |
825 | I've imbedded it in the following macro. | |
826 | */ | |
827 | ||
828 | /* Set namestring based on bufp. If the string table index is invalid, | |
829 | give a fake name, and print a single error message per symbol file read, | |
830 | rather than abort the symbol reading or flood the user with messages. */ | |
831 | #define SET_NAMESTRING()\ | |
3624c875 | 832 | if (((unsigned)bufp->n_strx) >= DBX_STRINGTAB_SIZE (objfile)) { \ |
021959e2 | 833 | complain (&string_table_offset_complaint, (char *) symnum); \ |
bd5635a1 RP |
834 | namestring = "foo"; \ |
835 | } else \ | |
3624c875 | 836 | namestring = bufp->n_strx + DBX_STRINGTAB (objfile) |
bd5635a1 | 837 | |
7e258d18 PB |
838 | #define CUR_SYMBOL_TYPE bufp->n_type |
839 | #define CUR_SYMBOL_VALUE bufp->n_value | |
840 | #define DBXREAD_ONLY | |
7e258d18 PB |
841 | #define START_PSYMTAB(ofile,addr,fname,low,symoff,global_syms,static_syms)\ |
842 | start_psymtab(ofile, addr, fname, low, symoff, global_syms, static_syms) | |
843 | #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\ | |
844 | end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps) | |
aab77d5f | 845 | |
7e258d18 | 846 | #include "partial-stab.h" |
bd5635a1 RP |
847 | } |
848 | ||
849 | /* If there's stuff to be cleaned up, clean it up. */ | |
3624c875 FF |
850 | if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */ |
851 | && objfile -> ei.entry_point < bufp->n_value | |
852 | && objfile -> ei.entry_point >= last_o_file_start) | |
bd5635a1 | 853 | { |
3624c875 FF |
854 | objfile -> ei.entry_file_lowpc = last_o_file_start; |
855 | objfile -> ei.entry_file_highpc = bufp->n_value; | |
bd5635a1 RP |
856 | } |
857 | ||
858 | if (pst) | |
859 | { | |
860 | end_psymtab (pst, psymtab_include_list, includes_used, | |
afe4ca15 | 861 | symnum * symbol_size, end_of_text_addr, |
7e258d18 | 862 | dependency_list, dependencies_used); |
bd5635a1 RP |
863 | } |
864 | ||
021959e2 | 865 | free_bincl_list (objfile); |
bd5635a1 RP |
866 | discard_cleanups (old_chain); |
867 | } | |
868 | ||
4a35d6e9 FF |
869 | /* Allocate and partially fill a partial symtab. It will be |
870 | completely filled at the end of the symbol list. | |
871 | ||
872 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
873 | is the address relative to which its symbols are (incremental) or 0 | |
874 | (normal). */ | |
875 | ||
bd5635a1 | 876 | |
7e258d18 | 877 | struct partial_symtab * |
7d9884b9 | 878 | start_psymtab (objfile, addr, |
bd5635a1 | 879 | filename, textlow, ldsymoff, global_syms, static_syms) |
7d9884b9 | 880 | struct objfile *objfile; |
bd5635a1 RP |
881 | CORE_ADDR addr; |
882 | char *filename; | |
883 | CORE_ADDR textlow; | |
884 | int ldsymoff; | |
885 | struct partial_symbol *global_syms; | |
886 | struct partial_symbol *static_syms; | |
887 | { | |
888 | struct partial_symtab *result = | |
021959e2 JG |
889 | start_psymtab_common(objfile, addr, |
890 | filename, textlow, global_syms, static_syms); | |
bd5635a1 | 891 | |
021959e2 JG |
892 | result->read_symtab_private = (char *) |
893 | obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc)); | |
894 | LDSYMOFF(result) = ldsymoff; | |
bd5635a1 RP |
895 | result->read_symtab = dbx_psymtab_to_symtab; |
896 | ||
bd5635a1 RP |
897 | return result; |
898 | } | |
899 | ||
bd5635a1 RP |
900 | /* Close off the current usage of a partial_symbol table entry. This |
901 | involves setting the correct number of includes (with a realloc), | |
902 | setting the high text mark, setting the symbol length in the | |
903 | executable, and setting the length of the global and static lists | |
904 | of psymbols. | |
905 | ||
906 | The global symbols and static symbols are then seperately sorted. | |
907 | ||
908 | Then the partial symtab is put on the global list. | |
909 | *** List variables and peculiarities of same. *** | |
910 | */ | |
021959e2 | 911 | |
7e258d18 | 912 | void |
bd5635a1 | 913 | end_psymtab (pst, include_list, num_includes, capping_symbol_offset, |
7e258d18 | 914 | capping_text, dependency_list, number_dependencies) |
bd5635a1 RP |
915 | struct partial_symtab *pst; |
916 | char **include_list; | |
917 | int num_includes; | |
918 | int capping_symbol_offset; | |
919 | CORE_ADDR capping_text; | |
920 | struct partial_symtab **dependency_list; | |
921 | int number_dependencies; | |
7e258d18 | 922 | /* struct partial_symbol *capping_global, *capping_static;*/ |
bd5635a1 RP |
923 | { |
924 | int i; | |
021959e2 | 925 | struct objfile *objfile = pst -> objfile; |
bd5635a1 | 926 | |
7e258d18 PB |
927 | if (capping_symbol_offset != -1) |
928 | LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst); | |
bd5635a1 RP |
929 | pst->texthigh = capping_text; |
930 | ||
931 | pst->n_global_syms = | |
021959e2 | 932 | objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
bd5635a1 | 933 | pst->n_static_syms = |
021959e2 | 934 | objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
bd5635a1 RP |
935 | |
936 | pst->number_of_dependencies = number_dependencies; | |
937 | if (number_dependencies) | |
938 | { | |
939 | pst->dependencies = (struct partial_symtab **) | |
021959e2 | 940 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 | 941 | number_dependencies * sizeof (struct partial_symtab *)); |
7e258d18 | 942 | memcpy (pst->dependencies, dependency_list, |
bd5635a1 RP |
943 | number_dependencies * sizeof (struct partial_symtab *)); |
944 | } | |
945 | else | |
946 | pst->dependencies = 0; | |
947 | ||
948 | for (i = 0; i < num_includes; i++) | |
949 | { | |
bd5635a1 | 950 | struct partial_symtab *subpst = |
021959e2 | 951 | allocate_psymtab (include_list[i], objfile); |
7d9884b9 | 952 | |
bd5635a1 | 953 | subpst->addr = pst->addr; |
021959e2 JG |
954 | subpst->read_symtab_private = |
955 | (char *) obstack_alloc (&objfile->psymbol_obstack, | |
956 | sizeof (struct symloc)); | |
4a35d6e9 FF |
957 | LDSYMOFF(subpst) = |
958 | LDSYMLEN(subpst) = | |
bd5635a1 RP |
959 | subpst->textlow = |
960 | subpst->texthigh = 0; | |
961 | ||
3f83182d JG |
962 | /* We could save slight bits of space by only making one of these, |
963 | shared by the entire set of include files. FIXME-someday. */ | |
bd5635a1 | 964 | subpst->dependencies = (struct partial_symtab **) |
021959e2 | 965 | obstack_alloc (&objfile->psymbol_obstack, |
bd5635a1 RP |
966 | sizeof (struct partial_symtab *)); |
967 | subpst->dependencies[0] = pst; | |
968 | subpst->number_of_dependencies = 1; | |
969 | ||
970 | subpst->globals_offset = | |
971 | subpst->n_global_syms = | |
972 | subpst->statics_offset = | |
973 | subpst->n_static_syms = 0; | |
974 | ||
975 | subpst->readin = 0; | |
9a822037 | 976 | subpst->symtab = 0; |
bd5635a1 | 977 | subpst->read_symtab = dbx_psymtab_to_symtab; |
bd5635a1 RP |
978 | } |
979 | ||
021959e2 | 980 | sort_pst_symbols (pst); |
bd5635a1 | 981 | |
f9623881 JG |
982 | /* If there is already a psymtab or symtab for a file of this name, remove it. |
983 | (If there is a symtab, more drastic things also happen.) | |
984 | This happens in VxWorks. */ | |
985 | free_named_symtabs (pst->filename); | |
986 | ||
7d9884b9 JG |
987 | if (num_includes == 0 |
988 | && number_dependencies == 0 | |
989 | && pst->n_global_syms == 0 | |
990 | && pst->n_static_syms == 0) { | |
991 | /* Throw away this psymtab, it's empty. We can't deallocate it, since | |
992 | it is on the obstack, but we can forget to chain it on the list. */ | |
318bf84f FF |
993 | struct partial_symtab *prev_pst; |
994 | ||
995 | /* First, snip it out of the psymtab chain */ | |
996 | ||
997 | if (pst->objfile->psymtabs == pst) | |
998 | pst->objfile->psymtabs = pst->next; | |
999 | else | |
1000 | for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next) | |
1001 | if (prev_pst->next == pst) | |
1002 | prev_pst->next = pst->next; | |
1003 | ||
1004 | /* Next, put it on a free list for recycling */ | |
1005 | ||
1006 | pst->next = pst->objfile->free_psymtabs; | |
1007 | pst->objfile->free_psymtabs = pst; | |
7d9884b9 | 1008 | } |
bd5635a1 RP |
1009 | } |
1010 | \f | |
1011 | static void | |
3624c875 | 1012 | psymtab_to_symtab_1 (pst, sym_offset) |
bd5635a1 | 1013 | struct partial_symtab *pst; |
bd5635a1 RP |
1014 | int sym_offset; |
1015 | { | |
1016 | struct cleanup *old_chain; | |
1017 | int i; | |
1018 | ||
1019 | if (!pst) | |
1020 | return; | |
1021 | ||
1022 | if (pst->readin) | |
1023 | { | |
1024 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1025 | pst->filename); | |
1026 | return; | |
1027 | } | |
1028 | ||
afe4ca15 | 1029 | /* Read in all partial symtabs on which this one is dependent */ |
bd5635a1 RP |
1030 | for (i = 0; i < pst->number_of_dependencies; i++) |
1031 | if (!pst->dependencies[i]->readin) | |
1032 | { | |
1033 | /* Inform about additional files that need to be read in. */ | |
1034 | if (info_verbose) | |
1035 | { | |
1036 | fputs_filtered (" ", stdout); | |
1037 | wrap_here (""); | |
1038 | fputs_filtered ("and ", stdout); | |
1039 | wrap_here (""); | |
1040 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
1041 | wrap_here (""); /* Flush output */ | |
1042 | fflush (stdout); | |
1043 | } | |
3624c875 | 1044 | psymtab_to_symtab_1 (pst->dependencies[i], sym_offset); |
bd5635a1 RP |
1045 | } |
1046 | ||
4a35d6e9 | 1047 | if (LDSYMLEN(pst)) /* Otherwise it's a dummy */ |
bd5635a1 RP |
1048 | { |
1049 | /* Init stuff necessary for reading in symbols */ | |
c0302457 | 1050 | buildsym_init (); |
bd5635a1 RP |
1051 | old_chain = make_cleanup (really_free_pendings, 0); |
1052 | ||
1053 | /* Read in this files symbols */ | |
7d9884b9 | 1054 | bfd_seek (pst->objfile->obfd, sym_offset, L_SET); |
9404978d | 1055 | pst->symtab = |
3624c875 FF |
1056 | read_ofile_symtab (pst->objfile, LDSYMOFF(pst), LDSYMLEN(pst), |
1057 | pst->textlow, pst->texthigh - pst->textlow, | |
1058 | pst->addr); | |
9404978d | 1059 | sort_symtab_syms (pst->symtab); |
bd5635a1 RP |
1060 | |
1061 | do_cleanups (old_chain); | |
1062 | } | |
1063 | ||
1064 | pst->readin = 1; | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Read in all of the symbols for a given psymtab for real. | |
1069 | * Be verbose about it if the user wants that. | |
1070 | */ | |
1071 | static void | |
1072 | dbx_psymtab_to_symtab (pst) | |
1073 | struct partial_symtab *pst; | |
1074 | { | |
3624c875 | 1075 | int val; |
bd5635a1 RP |
1076 | bfd *sym_bfd; |
1077 | long st_temp; | |
1078 | ||
1079 | if (!pst) | |
1080 | return; | |
1081 | ||
1082 | if (pst->readin) | |
1083 | { | |
1084 | fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n", | |
1085 | pst->filename); | |
1086 | return; | |
1087 | } | |
1088 | ||
4a35d6e9 | 1089 | if (LDSYMLEN(pst) || pst->number_of_dependencies) |
bd5635a1 RP |
1090 | { |
1091 | /* Print the message now, before reading the string table, | |
1092 | to avoid disconcerting pauses. */ | |
1093 | if (info_verbose) | |
1094 | { | |
1095 | printf_filtered ("Reading in symbols for %s...", pst->filename); | |
1096 | fflush (stdout); | |
1097 | } | |
1098 | ||
7d9884b9 | 1099 | sym_bfd = pst->objfile->obfd; |
bd5635a1 | 1100 | |
afe4ca15 JG |
1101 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
1102 | symbol_size = obj_symbol_entry_size (sym_bfd); | |
bd5635a1 | 1103 | |
aab77d5f PB |
1104 | next_symbol_text_func = dbx_next_symbol_text; |
1105 | ||
bd5635a1 RP |
1106 | /* FIXME, this uses internal BFD variables. See above in |
1107 | dbx_symbol_file_open where the macro is defined! */ | |
3624c875 | 1108 | psymtab_to_symtab_1 (pst, SYMBOL_TABLE_OFFSET); |
bd5635a1 RP |
1109 | |
1110 | /* Match with global symbols. This only needs to be done once, | |
1111 | after all of the symtabs and dependencies have been read in. */ | |
021959e2 | 1112 | scan_file_globals (pst->objfile); |
bd5635a1 | 1113 | |
bd5635a1 RP |
1114 | /* Finish up the debug error message. */ |
1115 | if (info_verbose) | |
1116 | printf_filtered ("done.\n"); | |
1117 | } | |
1118 | } | |
1119 | ||
bd5635a1 RP |
1120 | /* |
1121 | * Read in a defined section of a specific object file's symbols. | |
1122 | * | |
1123 | * DESC is the file descriptor for the file, positioned at the | |
1124 | * beginning of the symtab | |
bd5635a1 | 1125 | * SYM_OFFSET is the offset within the file of |
3624c875 FF |
1126 | * the beginning of the symbols we want to read |
1127 | * SYM_SIZE is the size of the symbol info to read in. | |
bd5635a1 RP |
1128 | * TEXT_OFFSET is the beginning of the text segment we are reading symbols for |
1129 | * TEXT_SIZE is the size of the text segment read in. | |
1130 | * OFFSET is a relocation offset which gets added to each symbol | |
1131 | */ | |
1132 | ||
9404978d | 1133 | static struct symtab * |
3624c875 FF |
1134 | read_ofile_symtab (objfile, sym_offset, sym_size, text_offset, text_size, |
1135 | offset) | |
7d9884b9 | 1136 | struct objfile *objfile; |
bd5635a1 RP |
1137 | int sym_offset; |
1138 | int sym_size; | |
1139 | CORE_ADDR text_offset; | |
1140 | int text_size; | |
1141 | int offset; | |
1142 | { | |
1143 | register char *namestring; | |
7d9884b9 | 1144 | register struct internal_nlist *bufp; |
bd5635a1 | 1145 | unsigned char type; |
afe4ca15 | 1146 | unsigned max_symnum; |
7d9884b9 JG |
1147 | register bfd *abfd; |
1148 | ||
021959e2 | 1149 | current_objfile = objfile; |
bd5635a1 RP |
1150 | subfile_stack = 0; |
1151 | ||
3624c875 | 1152 | stringtab_global = DBX_STRINGTAB (objfile); |
bd5635a1 RP |
1153 | last_source_file = 0; |
1154 | ||
7d9884b9 JG |
1155 | abfd = objfile->obfd; |
1156 | symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */ | |
1157 | our_objfile = objfile; /* For end_symtab calls in process_one_symbol */ | |
bd5635a1 RP |
1158 | symbuf_end = symbuf_idx = 0; |
1159 | ||
1160 | /* It is necessary to actually read one symbol *before* the start | |
1161 | of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL | |
1162 | occurs before the N_SO symbol. | |
1163 | ||
1164 | Detecting this in read_dbx_symtab | |
1165 | would slow down initial readin, so we look for it here instead. */ | |
afe4ca15 | 1166 | if (sym_offset >= (int)symbol_size) |
bd5635a1 | 1167 | { |
7d9884b9 JG |
1168 | bfd_seek (symfile_bfd, sym_offset - symbol_size, L_INCR); |
1169 | fill_symbuf (abfd); | |
bd5635a1 | 1170 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1171 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1172 | |
afe4ca15 | 1173 | SET_NAMESTRING (); |
bd5635a1 RP |
1174 | |
1175 | processing_gcc_compilation = | |
1176 | (bufp->n_type == N_TEXT | |
0cf9329b PB |
1177 | && (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0 |
1178 | || strcmp(namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)); | |
bd5635a1 RP |
1179 | } |
1180 | else | |
1181 | { | |
1182 | /* The N_SO starting this symtab is the first symbol, so we | |
1183 | better not check the symbol before it. I'm not this can | |
1184 | happen, but it doesn't hurt to check for it. */ | |
7d9884b9 | 1185 | bfd_seek (symfile_bfd, sym_offset, L_INCR); |
bd5635a1 RP |
1186 | processing_gcc_compilation = 0; |
1187 | } | |
1188 | ||
1189 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1190 | fill_symbuf (abfd); |
bd5635a1 RP |
1191 | bufp = &symbuf[symbuf_idx]; |
1192 | if (bufp->n_type != (unsigned char)N_SO) | |
1193 | error("First symbol in segment of executable not a source symbol"); | |
1194 | ||
afe4ca15 JG |
1195 | max_symnum = sym_size / symbol_size; |
1196 | ||
bd5635a1 | 1197 | for (symnum = 0; |
afe4ca15 | 1198 | symnum < max_symnum; |
bd5635a1 RP |
1199 | symnum++) |
1200 | { | |
1201 | QUIT; /* Allow this to be interruptable */ | |
1202 | if (symbuf_idx == symbuf_end) | |
7d9884b9 | 1203 | fill_symbuf(abfd); |
bd5635a1 | 1204 | bufp = &symbuf[symbuf_idx++]; |
7d9884b9 | 1205 | SWAP_SYMBOL (bufp, abfd); |
bd5635a1 | 1206 | |
c0302457 | 1207 | type = bufp->n_type; |
bd5635a1 RP |
1208 | if (type == (unsigned char)N_CATCH) |
1209 | { | |
1210 | /* N_CATCH is not fixed up by the linker, and unfortunately, | |
1211 | there's no other place to put it in the .stab map. */ | |
c55e6167 | 1212 | bufp->n_value += text_offset - offset; |
bd5635a1 | 1213 | } |
bd5635a1 | 1214 | |
afe4ca15 | 1215 | SET_NAMESTRING (); |
bd5635a1 | 1216 | |
7d9884b9 | 1217 | if (type & N_STAB) { |
c55e6167 JG |
1218 | process_one_symbol (type, bufp->n_desc, bufp->n_value, |
1219 | namestring, offset); | |
1220 | /* our_objfile is an implicit parameter. */ | |
7d9884b9 | 1221 | } |
bd5635a1 RP |
1222 | /* We skip checking for a new .o or -l file; that should never |
1223 | happen in this routine. */ | |
1224 | else if (type == N_TEXT | |
0cf9329b PB |
1225 | && (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0 |
1226 | || strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)) | |
bd5635a1 RP |
1227 | /* I don't think this code will ever be executed, because |
1228 | the GCC_COMPILED_FLAG_SYMBOL usually is right before | |
1229 | the N_SO symbol which starts this source file. | |
1230 | However, there is no reason not to accept | |
1231 | the GCC_COMPILED_FLAG_SYMBOL anywhere. */ | |
1232 | processing_gcc_compilation = 1; | |
1233 | else if (type & N_EXT || type == (unsigned char)N_TEXT | |
1234 | || type == (unsigned char)N_NBTEXT | |
0c4d2cc2 | 1235 | ) { |
bd5635a1 RP |
1236 | /* Global symbol: see if we came across a dbx defintion for |
1237 | a corresponding symbol. If so, store the value. Remove | |
1238 | syms from the chain when their values are stored, but | |
1239 | search the whole chain, as there may be several syms from | |
1240 | different files with the same name. */ | |
1241 | /* This is probably not true. Since the files will be read | |
1242 | in one at a time, each reference to a global symbol will | |
1243 | be satisfied in each file as it appears. So we skip this | |
1244 | section. */ | |
1245 | ; | |
0c4d2cc2 | 1246 | } |
bd5635a1 | 1247 | } |
9404978d | 1248 | |
021959e2 JG |
1249 | current_objfile = NULL; |
1250 | return (end_symtab (text_offset + text_size, 0, 0, objfile)); | |
bd5635a1 | 1251 | } |
bd5635a1 | 1252 | \f |
c55e6167 JG |
1253 | /* This handles a single symbol from the symbol-file, building symbols |
1254 | into a GDB symtab. It takes these arguments and an implicit argument. | |
1255 | ||
1256 | TYPE is the type field of the ".stab" symbol entry. | |
1257 | DESC is the desc field of the ".stab" entry. | |
1258 | VALU is the value field of the ".stab" entry. | |
1259 | NAME is the symbol name, in our address space. | |
1260 | OFFSET is the amount by which this object file was relocated | |
1261 | when it was loaded into memory. All symbols that refer | |
1262 | to memory locations need to be offset by this amount. | |
1263 | ||
1264 | The implicit argument is: | |
1265 | OUR_OBJFILE is the object file from which we are reading symbols. | |
1266 | It is used in end_symtab. */ | |
1267 | ||
7e258d18 | 1268 | void |
c55e6167 | 1269 | process_one_symbol (type, desc, valu, name, offset) |
bd5635a1 RP |
1270 | int type, desc; |
1271 | CORE_ADDR valu; | |
1272 | char *name; | |
c55e6167 | 1273 | int offset; |
bd5635a1 RP |
1274 | { |
1275 | #ifndef SUN_FIXED_LBRAC_BUG | |
0cf9329b | 1276 | /* This records the last pc address we've seen. We depend on there being |
bd5635a1 RP |
1277 | an SLINE or FUN or SO before the first LBRAC, since the variable does |
1278 | not get reset in between reads of different symbol files. */ | |
1279 | static CORE_ADDR last_pc_address; | |
1280 | #endif | |
1281 | register struct context_stack *new; | |
1282 | char *colon_pos; | |
1283 | ||
1284 | /* Something is wrong if we see real data before | |
1285 | seeing a source file name. */ | |
1286 | ||
1287 | if (last_source_file == 0 && type != (unsigned char)N_SO) | |
1288 | { | |
1289 | /* Currently this ignores N_ENTRY on Gould machines, N_NSYM on machines | |
1290 | where that code is defined. */ | |
1291 | if (IGNORE_SYMBOL (type)) | |
1292 | return; | |
1293 | ||
1294 | /* FIXME, this should not be an error, since it precludes extending | |
1295 | the symbol table information in this way... */ | |
1296 | error ("Invalid symbol data: does not start by identifying a source file."); | |
1297 | } | |
1298 | ||
1299 | switch (type) | |
1300 | { | |
1301 | case N_FUN: | |
1302 | case N_FNAME: | |
0bd83fd7 | 1303 | #if 0 |
3c03b5de SG |
1304 | /* It seems that the Sun ANSI C compiler (acc) replaces N_FUN with N_GSYM and |
1305 | N_STSYM with a type code of f or F. Can't enable this until we get some | |
0bd83fd7 SG |
1306 | stuff straightened out with psymtabs. */ |
1307 | ||
3c03b5de SG |
1308 | case N_GSYM: |
1309 | case N_STSYM: | |
0bd83fd7 | 1310 | #endif /* 0 */ |
3c03b5de | 1311 | |
c55e6167 JG |
1312 | valu += offset; /* Relocate for dynamic loading */ |
1313 | ||
bd5635a1 RP |
1314 | /* Either of these types of symbols indicates the start of |
1315 | a new function. We must process its "name" normally for dbx, | |
1316 | but also record the start of a new lexical context, and possibly | |
1317 | also the end of the lexical context for the previous function. */ | |
1318 | /* This is not always true. This type of symbol may indicate a | |
1319 | text segment variable. */ | |
1320 | ||
bd5635a1 RP |
1321 | colon_pos = strchr (name, ':'); |
1322 | if (!colon_pos++ | |
1323 | || (*colon_pos != 'f' && *colon_pos != 'F')) | |
1324 | { | |
021959e2 | 1325 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1326 | break; |
1327 | } | |
1328 | ||
3c03b5de SG |
1329 | #ifndef SUN_FIXED_LBRAC_BUG |
1330 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1331 | #endif | |
1332 | ||
bd5635a1 RP |
1333 | within_function = 1; |
1334 | if (context_stack_depth > 0) | |
1335 | { | |
7d9884b9 | 1336 | new = pop_context (); |
bd5635a1 RP |
1337 | /* Make a block for the local symbols within. */ |
1338 | finish_block (new->name, &local_symbols, new->old_blocks, | |
021959e2 | 1339 | new->start_addr, valu, our_objfile); |
bd5635a1 RP |
1340 | } |
1341 | /* Stack must be empty now. */ | |
1342 | if (context_stack_depth != 0) | |
021959e2 | 1343 | complain (&lbrac_unmatched_complaint, (char *) symnum); |
bd5635a1 | 1344 | |
7d9884b9 | 1345 | new = push_context (0, valu); |
021959e2 | 1346 | new->name = define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1347 | break; |
1348 | ||
1349 | case N_CATCH: | |
1350 | /* Record the address at which this catch takes place. */ | |
021959e2 | 1351 | define_symbol (valu+offset, name, desc, type, our_objfile); |
bd5635a1 RP |
1352 | break; |
1353 | ||
1354 | case N_LBRAC: | |
1355 | /* This "symbol" just indicates the start of an inner lexical | |
1356 | context within a function. */ | |
1357 | ||
c55e6167 JG |
1358 | #if defined (BLOCK_ADDRESS_ABSOLUTE) |
1359 | valu += offset; /* Relocate for dynamic loading */ | |
1360 | #else | |
bd5635a1 RP |
1361 | /* On most machines, the block addresses are relative to the |
1362 | N_SO, the linker did not relocate them (sigh). */ | |
1363 | valu += last_source_start_addr; | |
1364 | #endif | |
1365 | ||
1366 | #ifndef SUN_FIXED_LBRAC_BUG | |
1367 | if (valu < last_pc_address) { | |
1368 | /* Patch current LBRAC pc value to match last handy pc value */ | |
1369 | complain (&lbrac_complaint, 0); | |
1370 | valu = last_pc_address; | |
1371 | } | |
1372 | #endif | |
7d9884b9 | 1373 | new = push_context (desc, valu); |
bd5635a1 RP |
1374 | break; |
1375 | ||
1376 | case N_RBRAC: | |
1377 | /* This "symbol" just indicates the end of an inner lexical | |
1378 | context that was started with N_LBRAC. */ | |
1379 | ||
c55e6167 JG |
1380 | #if defined (BLOCK_ADDRESS_ABSOLUTE) |
1381 | valu += offset; /* Relocate for dynamic loading */ | |
1382 | #else | |
bd5635a1 RP |
1383 | /* On most machines, the block addresses are relative to the |
1384 | N_SO, the linker did not relocate them (sigh). */ | |
1385 | valu += last_source_start_addr; | |
1386 | #endif | |
1387 | ||
7d9884b9 | 1388 | new = pop_context(); |
bd5635a1 | 1389 | if (desc != new->depth) |
021959e2 | 1390 | complain (&lbrac_mismatch_complaint, (char *) symnum); |
bd5635a1 RP |
1391 | |
1392 | /* Some compilers put the variable decls inside of an | |
1393 | LBRAC/RBRAC block. This macro should be nonzero if this | |
1394 | is true. DESC is N_DESC from the N_RBRAC symbol. | |
0cf9329b PB |
1395 | GCC_P is true if we've detected the GCC_COMPILED_SYMBOL |
1396 | or the GCC2_COMPILED_SYMBOL. */ | |
bd5635a1 RP |
1397 | #if !defined (VARIABLES_INSIDE_BLOCK) |
1398 | #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0 | |
1399 | #endif | |
1400 | ||
1401 | /* Can only use new->locals as local symbols here if we're in | |
1402 | gcc or on a machine that puts them before the lbrack. */ | |
1403 | if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1404 | local_symbols = new->locals; | |
1405 | ||
1406 | /* If this is not the outermost LBRAC...RBRAC pair in the | |
1407 | function, its local symbols preceded it, and are the ones | |
1408 | just recovered from the context stack. Defined the block for them. | |
1409 | ||
1410 | If this is the outermost LBRAC...RBRAC pair, there is no | |
1411 | need to do anything; leave the symbols that preceded it | |
1412 | to be attached to the function's own block. However, if | |
1413 | it is so, we need to indicate that we just moved outside | |
1414 | of the function. */ | |
1415 | if (local_symbols | |
1416 | && (context_stack_depth | |
1417 | > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))) | |
1418 | { | |
1419 | /* FIXME Muzzle a compiler bug that makes end < start. */ | |
1420 | if (new->start_addr > valu) | |
1421 | { | |
1422 | complain(&lbrac_rbrac_complaint, 0); | |
1423 | new->start_addr = valu; | |
1424 | } | |
1425 | /* Make a block for the local symbols within. */ | |
1426 | finish_block (0, &local_symbols, new->old_blocks, | |
021959e2 | 1427 | new->start_addr, valu, our_objfile); |
bd5635a1 RP |
1428 | } |
1429 | else | |
1430 | { | |
1431 | within_function = 0; | |
1432 | } | |
1433 | if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation)) | |
1434 | /* Now pop locals of block just finished. */ | |
1435 | local_symbols = new->locals; | |
1436 | break; | |
1437 | ||
9bb30452 | 1438 | case N_FN: |
6150cc73 | 1439 | case N_FN_SEQ: |
9bb30452 | 1440 | /* This kind of symbol indicates the start of an object file. */ |
c55e6167 | 1441 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1442 | break; |
1443 | ||
1444 | case N_SO: | |
1445 | /* This type of symbol indicates the start of data | |
1446 | for one source file. | |
1447 | Finish the symbol table of the previous source file | |
1448 | (if any) and start accumulating a new symbol table. */ | |
c55e6167 JG |
1449 | valu += offset; /* Relocate for dynamic loading */ |
1450 | ||
bd5635a1 RP |
1451 | #ifndef SUN_FIXED_LBRAC_BUG |
1452 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1453 | #endif | |
1454 | ||
1455 | #ifdef PCC_SOL_BROKEN | |
1456 | /* pcc bug, occasionally puts out SO for SOL. */ | |
1457 | if (context_stack_depth > 0) | |
1458 | { | |
1459 | start_subfile (name, NULL); | |
1460 | break; | |
1461 | } | |
1462 | #endif | |
1463 | if (last_source_file) | |
7e258d18 PB |
1464 | { |
1465 | /* Check if previous symbol was also an N_SO (with some | |
1466 | sanity checks). If so, that one was actually the directory | |
1467 | name, and the current one is the real file name. | |
1468 | Patch things up. */ | |
1469 | if (previous_stab_code == N_SO | |
1470 | && current_subfile && current_subfile->dirname == NULL | |
1471 | && current_subfile->name != NULL | |
1472 | && current_subfile->name[strlen(current_subfile->name)-1] == '/') | |
1473 | { | |
1474 | current_subfile->dirname = current_subfile->name; | |
021959e2 JG |
1475 | current_subfile->name = |
1476 | obsavestring (name, strlen (name), | |
1477 | &our_objfile -> symbol_obstack); | |
7e258d18 PB |
1478 | break; |
1479 | } | |
021959e2 | 1480 | (void) end_symtab (valu, 0, 0, our_objfile); |
7e258d18 | 1481 | } |
bd5635a1 RP |
1482 | start_symtab (name, NULL, valu); |
1483 | break; | |
1484 | ||
c55e6167 | 1485 | |
bd5635a1 RP |
1486 | case N_SOL: |
1487 | /* This type of symbol indicates the start of data for | |
1488 | a sub-source-file, one whose contents were copied or | |
1489 | included in the compilation of the main source file | |
1490 | (whose name was given in the N_SO symbol.) */ | |
c55e6167 | 1491 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1492 | start_subfile (name, NULL); |
1493 | break; | |
1494 | ||
1495 | case N_BINCL: | |
1496 | push_subfile (); | |
1497 | add_new_header_file (name, valu); | |
1498 | start_subfile (name, NULL); | |
1499 | break; | |
1500 | ||
1501 | case N_EINCL: | |
1502 | start_subfile (pop_subfile (), NULL); | |
1503 | break; | |
1504 | ||
1505 | case N_EXCL: | |
1506 | add_old_header_file (name, valu); | |
1507 | break; | |
1508 | ||
1509 | case N_SLINE: | |
1510 | /* This type of "symbol" really just records | |
1511 | one line-number -- core-address correspondence. | |
1512 | Enter it in the line list for this symbol table. */ | |
c55e6167 | 1513 | valu += offset; /* Relocate for dynamic loading */ |
bd5635a1 RP |
1514 | #ifndef SUN_FIXED_LBRAC_BUG |
1515 | last_pc_address = valu; /* Save for SunOS bug circumcision */ | |
1516 | #endif | |
4137c5fc | 1517 | record_line (current_subfile, desc, valu); |
bd5635a1 RP |
1518 | break; |
1519 | ||
1520 | case N_BCOMM: | |
1521 | if (common_block) | |
1522 | error ("Invalid symbol data: common within common at symtab pos %d", | |
1523 | symnum); | |
1524 | common_block = local_symbols; | |
1525 | common_block_i = local_symbols ? local_symbols->nsyms : 0; | |
1526 | break; | |
1527 | ||
1528 | case N_ECOMM: | |
1529 | /* Symbols declared since the BCOMM are to have the common block | |
1530 | start address added in when we know it. common_block points to | |
1531 | the first symbol after the BCOMM in the local_symbols list; | |
1532 | copy the list and hang it off the symbol for the common block name | |
1533 | for later fixup. */ | |
1534 | { | |
1535 | int i; | |
1536 | struct symbol *sym = | |
318bf84f | 1537 | (struct symbol *) xmmalloc (our_objfile -> md, sizeof (struct symbol)); |
bd5635a1 RP |
1538 | bzero (sym, sizeof *sym); |
1539 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
1540 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1541 | SYMBOL_NAMESPACE (sym) = (enum namespace)((long) | |
1542 | copy_pending (local_symbols, common_block_i, common_block)); | |
1543 | i = hashname (SYMBOL_NAME (sym)); | |
1544 | SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i]; | |
1545 | global_sym_chain[i] = sym; | |
1546 | common_block = 0; | |
1547 | break; | |
1548 | } | |
1549 | ||
c55e6167 JG |
1550 | /* The following symbol types need to have the offset added to their |
1551 | value; then we process symbol definitions in the name. */ | |
1552 | case N_STSYM: /* Global symbol */ | |
1553 | case N_LCSYM: /* Local symbol */ | |
1554 | case N_DSLINE: /* Source line number, data seg */ | |
1555 | case N_BSLINE: /* Source line number, bss seg */ | |
1556 | /* N_BROWS: overlaps with N_BSLINE */ | |
1557 | case N_ENTRY: /* Alternate entry point */ | |
1558 | valu += offset; /* Relocate for dynamic loading */ | |
1559 | /* FALL THROUGH */ | |
1560 | ||
1561 | /* The following symbol types don't need the address field relocated, | |
1562 | since it is either unused, or is absolute. */ | |
1563 | case N_GSYM: /* Global variable */ | |
1564 | case N_NSYMS: /* Number of symbols (ultrix) */ | |
1565 | case N_NOMAP: /* No map? (ultrix) */ | |
1566 | case N_RSYM: /* Register variable */ | |
1567 | case N_DEFD: /* Modula-2 GNU module dependency */ | |
1568 | case N_SSYM: /* Struct or union element */ | |
1569 | case N_LSYM: /* Local symbol in stack */ | |
1570 | case N_PSYM: /* Parameter variable */ | |
1571 | case N_LENG: /* Length of preceding symbol type */ | |
1572 | if (name) | |
021959e2 | 1573 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 RP |
1574 | break; |
1575 | ||
c55e6167 JG |
1576 | /* The following symbol types we don't know how to process. Handle |
1577 | them in a "default" way, but complain to people who care. */ | |
bd5635a1 | 1578 | default: |
c55e6167 JG |
1579 | case N_EHDECL: /* Exception handler name */ |
1580 | case N_MAIN: /* Name of main routine (not used in C) */ | |
1581 | case N_PC: /* Global symbol in Pascal */ | |
1582 | case N_M2C: /* Modula-2 compilation unit */ | |
1583 | /* N_MOD2: overlaps with N_EHDECL */ | |
1584 | case N_SCOPE: /* Modula-2 scope information */ | |
1585 | case N_ECOML: /* End common (local name) */ | |
1586 | case N_NBTEXT: /* Gould Non-Base-Register symbols??? */ | |
1587 | case N_NBDATA: | |
1588 | case N_NBBSS: | |
1589 | case N_NBSTS: | |
1590 | case N_NBLCS: | |
1591 | complain (&unknown_symtype_complaint, local_hex_string(type)); | |
bd5635a1 | 1592 | if (name) |
021959e2 | 1593 | define_symbol (valu, name, desc, type, our_objfile); |
bd5635a1 | 1594 | } |
7e258d18 PB |
1595 | |
1596 | previous_stab_code = type; | |
bd5635a1 RP |
1597 | } |
1598 | \f | |
bd5635a1 RP |
1599 | /* Copy a pending list, used to record the contents of a common |
1600 | block for later fixup. */ | |
1601 | static struct pending * | |
1602 | copy_pending (beg, begi, end) | |
021959e2 | 1603 | struct pending *beg; |
bd5635a1 | 1604 | int begi; |
021959e2 | 1605 | struct pending *end; |
bd5635a1 RP |
1606 | { |
1607 | struct pending *new = 0; | |
1608 | struct pending *next; | |
1609 | ||
1610 | for (next = beg; next != 0 && (next != end || begi < end->nsyms); | |
1611 | next = next->next, begi = 0) | |
1612 | { | |
1613 | register int j; | |
1614 | for (j = begi; j < next->nsyms; j++) | |
1615 | add_symbol_to_list (next->symbol[j], &new); | |
1616 | } | |
1617 | return new; | |
1618 | } | |
bd5635a1 RP |
1619 | \f |
1620 | /* Register our willingness to decode symbols for SunOS and a.out and | |
1621 | b.out files handled by BFD... */ | |
80d68b1d FF |
1622 | static struct sym_fns sunos_sym_fns = |
1623 | { | |
1624 | "sunOs", /* sym_name: name or name prefix of BFD target type */ | |
1625 | 6, /* sym_namelen: number of significant sym_name chars */ | |
1626 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
1627 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
1628 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
1629 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
1630 | NULL /* next: pointer to next struct sym_fns */ | |
1631 | }; | |
bd5635a1 | 1632 | |
80d68b1d FF |
1633 | static struct sym_fns aout_sym_fns = |
1634 | { | |
1635 | "a.out", /* sym_name: name or name prefix of BFD target type */ | |
1636 | 5, /* sym_namelen: number of significant sym_name chars */ | |
1637 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
1638 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
1639 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
1640 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
1641 | NULL /* next: pointer to next struct sym_fns */ | |
1642 | }; | |
bd5635a1 | 1643 | |
80d68b1d FF |
1644 | static struct sym_fns bout_sym_fns = |
1645 | { | |
1646 | "b.out", /* sym_name: name or name prefix of BFD target type */ | |
1647 | 5, /* sym_namelen: number of significant sym_name chars */ | |
1648 | dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
1649 | dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
1650 | dbx_symfile_read, /* sym_read: read a symbol file into symtab */ | |
1651 | dbx_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
1652 | NULL /* next: pointer to next struct sym_fns */ | |
1653 | }; | |
bd5635a1 RP |
1654 | |
1655 | void | |
1656 | _initialize_dbxread () | |
1657 | { | |
1658 | add_symtab_fns(&sunos_sym_fns); | |
1659 | add_symtab_fns(&aout_sym_fns); | |
1660 | add_symtab_fns(&bout_sym_fns); | |
bd5635a1 | 1661 | } |