* dbxread.c (read_dbx_symtab): Add FIXME about finding section
[deliverable/binutils-gdb.git] / gdb / dbxread.c
1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003.
4 Free Software Foundation, Inc.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
27 from a file.
28
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
36
37 #include "defs.h"
38 #include "gdb_string.h"
39
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
42 #include <fcntl.h>
43 #endif
44
45 #include "gdb_obstack.h"
46 #include "gdb_stat.h"
47 #include "symtab.h"
48 #include "breakpoint.h"
49 #include "target.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
52 #include "symfile.h"
53 #include "objfiles.h"
54 #include "buildsym.h"
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
57 #include "demangle.h"
58 #include "language.h" /* Needed for local_hex_string */
59 #include "complaints.h"
60 #include "cp-abi.h"
61 #include "gdb_assert.h"
62
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
65 \f
66
67 /* This macro returns the size field of a minimal symbol, which is normally
68 stored in the "info" field. The macro can be overridden for specific
69 targets (e.g. MIPS16) that use the info field for other purposes. */
70 #ifndef MSYMBOL_SIZE
71 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
72 #endif
73
74
75 /* We put a pointer to this structure in the read_symtab_private field
76 of the psymtab. */
77
78 struct symloc
79 {
80 /* Offset within the file symbol table of first local symbol for this
81 file. */
82
83 int ldsymoff;
84
85 /* Length (in bytes) of the section of the symbol table devoted to
86 this file's symbols (actually, the section bracketed may contain
87 more than just this file's symbols). If ldsymlen is 0, the only
88 reason for this thing's existence is the dependency list. Nothing
89 else will happen when it is read in. */
90
91 int ldsymlen;
92
93 /* The size of each symbol in the symbol file (in external form). */
94
95 int symbol_size;
96
97 /* Further information needed to locate the symbols if they are in
98 an ELF file. */
99
100 int symbol_offset;
101 int string_offset;
102 int file_string_offset;
103 };
104
105 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
106 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
107 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
108 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
109 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
110 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
111 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
112 \f
113
114 /* Remember what we deduced to be the source language of this psymtab. */
115
116 static enum language psymtab_language = language_unknown;
117
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
119
120 static bfd *symfile_bfd;
121
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
125
126 static unsigned symbol_size;
127
128 /* This is the offset of the symbol table in the executable file. */
129
130 static unsigned symbol_table_offset;
131
132 /* This is the offset of the string table in the executable file. */
133
134 static unsigned string_table_offset;
135
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
141
142 static unsigned int file_string_table_offset;
143 static unsigned int next_file_string_table_offset;
144
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
148
149 static int symfile_relocatable = 0;
150
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
153
154 static int block_address_function_relative = 0;
155 \f
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
161
162 static CORE_ADDR lowest_text_address;
163
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
166
167 static int has_line_numbers;
168
169 /* Complaints about the symbols we have encountered. */
170
171 static void
172 unknown_symtype_complaint (const char *arg1)
173 {
174 complaint (&symfile_complaints, "unknown symbol type %s", arg1);
175 }
176
177 static void
178 lbrac_mismatch_complaint (int arg1)
179 {
180 complaint (&symfile_complaints,
181 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1);
182 }
183
184 static void
185 repeated_header_complaint (const char *arg1, int arg2)
186 {
187 complaint (&symfile_complaints,
188 "\"repeated\" header file %s not previously seen, at symtab pos %d",
189 arg1, arg2);
190 }
191
192 /* find_text_range --- find start and end of loadable code sections
193
194 The find_text_range function finds the shortest address range that
195 encloses all sections containing executable code, and stores it in
196 objfile's text_addr and text_size members.
197
198 dbx_symfile_read will use this to finish off the partial symbol
199 table, in some cases. */
200
201 static void
202 find_text_range (bfd * sym_bfd, struct objfile *objfile)
203 {
204 asection *sec;
205 int found_any = 0;
206 CORE_ADDR start = 0;
207 CORE_ADDR end = 0;
208
209 for (sec = sym_bfd->sections; sec; sec = sec->next)
210 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
211 {
212 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
213 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
214
215 if (found_any)
216 {
217 if (sec_start < start)
218 start = sec_start;
219 if (sec_end > end)
220 end = sec_end;
221 }
222 else
223 {
224 start = sec_start;
225 end = sec_end;
226 }
227
228 found_any = 1;
229 }
230
231 if (!found_any)
232 error ("Can't find any code sections in symbol file");
233
234 DBX_TEXT_ADDR (objfile) = start;
235 DBX_TEXT_SIZE (objfile) = end - start;
236 }
237 \f
238
239
240 /* During initial symbol readin, we need to have a structure to keep
241 track of which psymtabs have which bincls in them. This structure
242 is used during readin to setup the list of dependencies within each
243 partial symbol table. */
244
245 struct header_file_location
246 {
247 char *name; /* Name of header file */
248 int instance; /* See above */
249 struct partial_symtab *pst; /* Partial symtab that has the
250 BINCL/EINCL defs for this file */
251 };
252
253 /* The actual list and controling variables */
254 static struct header_file_location *bincl_list, *next_bincl;
255 static int bincls_allocated;
256
257 /* Local function prototypes */
258
259 extern void _initialize_dbxread (void);
260
261 #if 0 /* OBSOLETE CFront */
262 // OBSOLETE static void process_now (struct objfile *);
263 #endif /* OBSOLETE CFront */
264
265 static void read_ofile_symtab (struct partial_symtab *);
266
267 static void dbx_psymtab_to_symtab (struct partial_symtab *);
268
269 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
270
271 static void read_dbx_dynamic_symtab (struct objfile *objfile);
272
273 static void read_dbx_symtab (struct objfile *);
274
275 static void free_bincl_list (struct objfile *);
276
277 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
278
279 static void add_bincl_to_list (struct partial_symtab *, char *, int);
280
281 static void init_bincl_list (int, struct objfile *);
282
283 static char *dbx_next_symbol_text (struct objfile *);
284
285 static void fill_symbuf (bfd *);
286
287 static void dbx_symfile_init (struct objfile *);
288
289 static void dbx_new_init (struct objfile *);
290
291 static void dbx_symfile_read (struct objfile *, int);
292
293 static void dbx_symfile_finish (struct objfile *);
294
295 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
296
297 static void add_new_header_file (char *, int);
298
299 static void add_old_header_file (char *, int);
300
301 static void add_this_object_header_file (int);
302
303 static struct partial_symtab *start_psymtab (struct objfile *, char *,
304 CORE_ADDR, int,
305 struct partial_symbol **,
306 struct partial_symbol **);
307
308 /* Free up old header file tables */
309
310 void
311 free_header_files (void)
312 {
313 if (this_object_header_files)
314 {
315 xfree (this_object_header_files);
316 this_object_header_files = NULL;
317 }
318 n_allocated_this_object_header_files = 0;
319 }
320
321 /* Allocate new header file tables */
322
323 void
324 init_header_files (void)
325 {
326 n_allocated_this_object_header_files = 10;
327 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
328 }
329
330 /* Add header file number I for this object file
331 at the next successive FILENUM. */
332
333 static void
334 add_this_object_header_file (int i)
335 {
336 if (n_this_object_header_files == n_allocated_this_object_header_files)
337 {
338 n_allocated_this_object_header_files *= 2;
339 this_object_header_files
340 = (int *) xrealloc ((char *) this_object_header_files,
341 n_allocated_this_object_header_files * sizeof (int));
342 }
343
344 this_object_header_files[n_this_object_header_files++] = i;
345 }
346
347 /* Add to this file an "old" header file, one already seen in
348 a previous object file. NAME is the header file's name.
349 INSTANCE is its instance code, to select among multiple
350 symbol tables for the same header file. */
351
352 static void
353 add_old_header_file (char *name, int instance)
354 {
355 register struct header_file *p = HEADER_FILES (current_objfile);
356 register int i;
357
358 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
359 if (STREQ (p[i].name, name) && instance == p[i].instance)
360 {
361 add_this_object_header_file (i);
362 return;
363 }
364 repeated_header_complaint (name, symnum);
365 }
366
367 /* Add to this file a "new" header file: definitions for its types follow.
368 NAME is the header file's name.
369 Most often this happens only once for each distinct header file,
370 but not necessarily. If it happens more than once, INSTANCE has
371 a different value each time, and references to the header file
372 use INSTANCE values to select among them.
373
374 dbx output contains "begin" and "end" markers for each new header file,
375 but at this level we just need to know which files there have been;
376 so we record the file when its "begin" is seen and ignore the "end". */
377
378 static void
379 add_new_header_file (char *name, int instance)
380 {
381 register int i;
382 register struct header_file *hfile;
383
384 /* Make sure there is room for one more header file. */
385
386 i = N_ALLOCATED_HEADER_FILES (current_objfile);
387
388 if (N_HEADER_FILES (current_objfile) == i)
389 {
390 if (i == 0)
391 {
392 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
393 HEADER_FILES (current_objfile) = (struct header_file *)
394 xmalloc (10 * sizeof (struct header_file));
395 }
396 else
397 {
398 i *= 2;
399 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
400 HEADER_FILES (current_objfile) = (struct header_file *)
401 xrealloc ((char *) HEADER_FILES (current_objfile),
402 (i * sizeof (struct header_file)));
403 }
404 }
405
406 /* Create an entry for this header file. */
407
408 i = N_HEADER_FILES (current_objfile)++;
409 hfile = HEADER_FILES (current_objfile) + i;
410 hfile->name = savestring (name, strlen (name));
411 hfile->instance = instance;
412 hfile->length = 10;
413 hfile->vector
414 = (struct type **) xmalloc (10 * sizeof (struct type *));
415 memset (hfile->vector, 0, 10 * sizeof (struct type *));
416
417 add_this_object_header_file (i);
418 }
419
420 #if 0
421 static struct type **
422 explicit_lookup_type (int real_filenum, int index)
423 {
424 register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
425
426 if (index >= f->length)
427 {
428 f->length *= 2;
429 f->vector = (struct type **)
430 xrealloc (f->vector, f->length * sizeof (struct type *));
431 memset (&f->vector[f->length / 2],
432 '\0', f->length * sizeof (struct type *) / 2);
433 }
434 return &f->vector[index];
435 }
436 #endif
437 \f
438 static void
439 record_minimal_symbol (char *name, CORE_ADDR address, int type,
440 struct objfile *objfile)
441 {
442 enum minimal_symbol_type ms_type;
443 int section;
444 asection *bfd_section;
445
446 switch (type)
447 {
448 case N_TEXT | N_EXT:
449 ms_type = mst_text;
450 section = SECT_OFF_TEXT (objfile);
451 bfd_section = DBX_TEXT_SECTION (objfile);
452 break;
453 case N_DATA | N_EXT:
454 ms_type = mst_data;
455 section = SECT_OFF_DATA (objfile);
456 bfd_section = DBX_DATA_SECTION (objfile);
457 break;
458 case N_BSS | N_EXT:
459 ms_type = mst_bss;
460 section = SECT_OFF_BSS (objfile);
461 bfd_section = DBX_BSS_SECTION (objfile);
462 break;
463 case N_ABS | N_EXT:
464 ms_type = mst_abs;
465 section = -1;
466 bfd_section = NULL;
467 break;
468 #ifdef N_SETV
469 case N_SETV | N_EXT:
470 ms_type = mst_data;
471 section = SECT_OFF_DATA (objfile);
472 bfd_section = DBX_DATA_SECTION (objfile);
473 break;
474 case N_SETV:
475 /* I don't think this type actually exists; since a N_SETV is the result
476 of going over many .o files, it doesn't make sense to have one
477 file local. */
478 ms_type = mst_file_data;
479 section = SECT_OFF_DATA (objfile);
480 bfd_section = DBX_DATA_SECTION (objfile);
481 break;
482 #endif
483 case N_TEXT:
484 case N_NBTEXT:
485 case N_FN:
486 case N_FN_SEQ:
487 ms_type = mst_file_text;
488 section = SECT_OFF_TEXT (objfile);
489 bfd_section = DBX_TEXT_SECTION (objfile);
490 break;
491 case N_DATA:
492 ms_type = mst_file_data;
493
494 /* Check for __DYNAMIC, which is used by Sun shared libraries.
495 Record it as global even if it's local, not global, so
496 lookup_minimal_symbol can find it. We don't check symbol_leading_char
497 because for SunOS4 it always is '_'. */
498 if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
499 ms_type = mst_data;
500
501 /* Same with virtual function tables, both global and static. */
502 {
503 char *tempstring = name;
504 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
505 ++tempstring;
506 if (is_vtable_name (tempstring))
507 ms_type = mst_data;
508 }
509 section = SECT_OFF_DATA (objfile);
510 bfd_section = DBX_DATA_SECTION (objfile);
511 break;
512 case N_BSS:
513 ms_type = mst_file_bss;
514 section = SECT_OFF_BSS (objfile);
515 bfd_section = DBX_BSS_SECTION (objfile);
516 break;
517 default:
518 ms_type = mst_unknown;
519 section = -1;
520 bfd_section = NULL;
521 break;
522 }
523
524 if ((ms_type == mst_file_text || ms_type == mst_text)
525 && address < lowest_text_address)
526 lowest_text_address = address;
527
528 prim_record_minimal_symbol_and_info
529 (name, address, ms_type, NULL, section, bfd_section, objfile);
530 }
531 \f
532 /* Scan and build partial symbols for a symbol file.
533 We have been initialized by a call to dbx_symfile_init, which
534 put all the relevant info into a "struct dbx_symfile_info",
535 hung off the objfile structure.
536
537 MAINLINE is true if we are reading the main symbol
538 table (as opposed to a shared lib or dynamically loaded file). */
539
540 static void
541 dbx_symfile_read (struct objfile *objfile, int mainline)
542 {
543 bfd *sym_bfd;
544 int val;
545 struct cleanup *back_to;
546
547 sym_bfd = objfile->obfd;
548
549 /* .o and .nlm files are relocatables with text, data and bss segs based at
550 0. This flag disables special (Solaris stabs-in-elf only) fixups for
551 symbols with a value of 0. */
552
553 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
554
555 /* This is true for Solaris (and all other systems which put stabs
556 in sections, hopefully, since it would be silly to do things
557 differently from Solaris), and false for SunOS4 and other a.out
558 file formats. */
559 block_address_function_relative =
560 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
561 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
562 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
563 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
564 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
565 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
566
567 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
568 if (val < 0)
569 perror_with_name (objfile->name);
570
571 /* If we are reinitializing, or if we have never loaded syms yet, init */
572 if (mainline
573 || (objfile->global_psymbols.size == 0
574 && objfile->static_psymbols.size == 0))
575 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
576
577 symbol_size = DBX_SYMBOL_SIZE (objfile);
578 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
579
580 free_pending_blocks ();
581 back_to = make_cleanup (really_free_pendings, 0);
582
583 init_minimal_symbol_collection ();
584 make_cleanup_discard_minimal_symbols ();
585
586 /* Read stabs data from executable file and define symbols. */
587
588 read_dbx_symtab (objfile);
589
590 /* Add the dynamic symbols. */
591
592 read_dbx_dynamic_symtab (objfile);
593
594 /* Install any minimal symbols that have been collected as the current
595 minimal symbols for this objfile. */
596
597 install_minimal_symbols (objfile);
598
599 do_cleanups (back_to);
600 }
601
602 /* Initialize anything that needs initializing when a completely new
603 symbol file is specified (not just adding some symbols from another
604 file, e.g. a shared library). */
605
606 static void
607 dbx_new_init (struct objfile *ignore)
608 {
609 stabsread_new_init ();
610 buildsym_new_init ();
611 init_header_files ();
612 }
613
614
615 /* dbx_symfile_init ()
616 is the dbx-specific initialization routine for reading symbols.
617 It is passed a struct objfile which contains, among other things,
618 the BFD for the file whose symbols are being read, and a slot for a pointer
619 to "private data" which we fill with goodies.
620
621 We read the string table into malloc'd space and stash a pointer to it.
622
623 Since BFD doesn't know how to read debug symbols in a format-independent
624 way (and may never do so...), we have to do it ourselves. We will never
625 be called unless this is an a.out (or very similar) file.
626 FIXME, there should be a cleaner peephole into the BFD environment here. */
627
628 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
629
630 static void
631 dbx_symfile_init (struct objfile *objfile)
632 {
633 int val;
634 bfd *sym_bfd = objfile->obfd;
635 char *name = bfd_get_filename (sym_bfd);
636 asection *text_sect;
637 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
638
639 /* Allocate struct to keep track of the symfile */
640 objfile->sym_stab_info = (struct dbx_symfile_info *)
641 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
642 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
643
644 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
645 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
646 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
647
648 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
649 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
650 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
651
652 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
653
654 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
655
656 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
657 if (!text_sect)
658 error ("Can't find .text section in symbol file");
659 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
660 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
661
662 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
663 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
664 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
665
666 /* Read the string table and stash it away in the psymbol_obstack. It is
667 only needed as long as we need to expand psymbols into full symbols,
668 so when we blow away the psymbol the string table goes away as well.
669 Note that gdb used to use the results of attempting to malloc the
670 string table, based on the size it read, as a form of sanity check
671 for botched byte swapping, on the theory that a byte swapped string
672 table size would be so totally bogus that the malloc would fail. Now
673 that we put in on the psymbol_obstack, we can't do this since gdb gets
674 a fatal error (out of virtual memory) if the size is bogus. We can
675 however at least check to see if the size is less than the size of
676 the size field itself, or larger than the size of the entire file.
677 Note that all valid string tables have a size greater than zero, since
678 the bytes used to hold the size are included in the count. */
679
680 if (STRING_TABLE_OFFSET == 0)
681 {
682 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
683 will never be zero, even when there is no string table. This
684 would appear to be a bug in bfd. */
685 DBX_STRINGTAB_SIZE (objfile) = 0;
686 DBX_STRINGTAB (objfile) = NULL;
687 }
688 else
689 {
690 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
691 if (val < 0)
692 perror_with_name (name);
693
694 memset (size_temp, 0, sizeof (size_temp));
695 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
696 if (val < 0)
697 {
698 perror_with_name (name);
699 }
700 else if (val == 0)
701 {
702 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
703 EOF if there is no string table, and attempting to read the size
704 from EOF will read zero bytes. */
705 DBX_STRINGTAB_SIZE (objfile) = 0;
706 DBX_STRINGTAB (objfile) = NULL;
707 }
708 else
709 {
710 /* Read some data that would appear to be the string table size.
711 If there really is a string table, then it is probably the right
712 size. Byteswap if necessary and validate the size. Note that
713 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
714 random data that happened to be at STRING_TABLE_OFFSET, because
715 bfd can't tell us there is no string table, the sanity checks may
716 or may not catch this. */
717 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
718
719 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
720 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
721 error ("ridiculous string table size (%d bytes).",
722 DBX_STRINGTAB_SIZE (objfile));
723
724 DBX_STRINGTAB (objfile) =
725 (char *) obstack_alloc (&objfile->psymbol_obstack,
726 DBX_STRINGTAB_SIZE (objfile));
727 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
728
729 /* Now read in the string table in one big gulp. */
730
731 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
732 if (val < 0)
733 perror_with_name (name);
734 val = bfd_bread (DBX_STRINGTAB (objfile),
735 DBX_STRINGTAB_SIZE (objfile),
736 sym_bfd);
737 if (val != DBX_STRINGTAB_SIZE (objfile))
738 perror_with_name (name);
739 }
740 }
741 }
742
743 /* Perform any local cleanups required when we are done with a particular
744 objfile. I.E, we are in the process of discarding all symbol information
745 for an objfile, freeing up all memory held for it, and unlinking the
746 objfile struct from the global list of known objfiles. */
747
748 static void
749 dbx_symfile_finish (struct objfile *objfile)
750 {
751 if (objfile->sym_stab_info != NULL)
752 {
753 if (HEADER_FILES (objfile) != NULL)
754 {
755 register int i = N_HEADER_FILES (objfile);
756 register struct header_file *hfiles = HEADER_FILES (objfile);
757
758 while (--i >= 0)
759 {
760 xfree (hfiles[i].name);
761 xfree (hfiles[i].vector);
762 }
763 xfree (hfiles);
764 }
765 xmfree (objfile->md, objfile->sym_stab_info);
766 }
767 free_header_files ();
768 }
769 \f
770
771 /* Buffer for reading the symbol table entries. */
772 static struct external_nlist symbuf[4096];
773 static int symbuf_idx;
774 static int symbuf_end;
775
776 #if 0 /* OBSOLETE CFront */
777 // OBSOLETE /* cont_elem is used for continuing information in cfront.
778 // OBSOLETE It saves information about which types need to be fixed up and
779 // OBSOLETE completed after all the stabs are read. */
780 // OBSOLETE struct cont_elem
781 // OBSOLETE {
782 // OBSOLETE /* sym and stabstring for continuing information in cfront */
783 // OBSOLETE struct symbol *sym;
784 // OBSOLETE char *stabs;
785 // OBSOLETE /* state dependencies (statics that must be preserved) */
786 // OBSOLETE int sym_idx;
787 // OBSOLETE int sym_end;
788 // OBSOLETE int symnum;
789 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
790 // OBSOLETE /* other state dependencies include:
791 // OBSOLETE (assumption is that these will not change since process_now FIXME!!)
792 // OBSOLETE stringtab_global
793 // OBSOLETE n_stabs
794 // OBSOLETE objfile
795 // OBSOLETE symfile_bfd */
796 // OBSOLETE };
797
798 // OBSOLETE static struct cont_elem *cont_list = 0;
799 // OBSOLETE static int cont_limit = 0;
800 // OBSOLETE static int cont_count = 0;
801
802 // OBSOLETE /* Arrange for function F to be called with arguments SYM and P later
803 // OBSOLETE in the stabs reading process. */
804 // OBSOLETE void
805 // OBSOLETE process_later (struct symbol *sym, char *p,
806 // OBSOLETE int (*f) (struct objfile *, struct symbol *, char *))
807 // OBSOLETE {
808
809 // OBSOLETE /* Allocate more space for the deferred list. */
810 // OBSOLETE if (cont_count >= cont_limit - 1)
811 // OBSOLETE {
812 // OBSOLETE cont_limit += 32; /* chunk size */
813
814 // OBSOLETE cont_list
815 // OBSOLETE = (struct cont_elem *) xrealloc (cont_list,
816 // OBSOLETE (cont_limit
817 // OBSOLETE * sizeof (struct cont_elem)));
818 // OBSOLETE if (!cont_list)
819 // OBSOLETE error ("Virtual memory exhausted\n");
820 // OBSOLETE }
821
822 // OBSOLETE /* Save state variables so we can process these stabs later. */
823 // OBSOLETE cont_list[cont_count].sym_idx = symbuf_idx;
824 // OBSOLETE cont_list[cont_count].sym_end = symbuf_end;
825 // OBSOLETE cont_list[cont_count].symnum = symnum;
826 // OBSOLETE cont_list[cont_count].sym = sym;
827 // OBSOLETE cont_list[cont_count].stabs = p;
828 // OBSOLETE cont_list[cont_count].func = f;
829 // OBSOLETE cont_count++;
830 // OBSOLETE }
831
832 // OBSOLETE /* Call deferred funtions in CONT_LIST. */
833
834 // OBSOLETE static void
835 // OBSOLETE process_now (struct objfile *objfile)
836 // OBSOLETE {
837 // OBSOLETE int i;
838 // OBSOLETE int save_symbuf_idx;
839 // OBSOLETE int save_symbuf_end;
840 // OBSOLETE int save_symnum;
841 // OBSOLETE struct symbol *sym;
842 // OBSOLETE char *stabs;
843 // OBSOLETE int err;
844 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
845
846 // OBSOLETE /* Save the state of our caller, we'll want to restore it before
847 // OBSOLETE returning. */
848 // OBSOLETE save_symbuf_idx = symbuf_idx;
849 // OBSOLETE save_symbuf_end = symbuf_end;
850 // OBSOLETE save_symnum = symnum;
851
852 // OBSOLETE /* Iterate over all the deferred stabs. */
853 // OBSOLETE for (i = 0; i < cont_count; i++)
854 // OBSOLETE {
855 // OBSOLETE /* Restore the state for this deferred stab. */
856 // OBSOLETE symbuf_idx = cont_list[i].sym_idx;
857 // OBSOLETE symbuf_end = cont_list[i].sym_end;
858 // OBSOLETE symnum = cont_list[i].symnum;
859 // OBSOLETE sym = cont_list[i].sym;
860 // OBSOLETE stabs = cont_list[i].stabs;
861 // OBSOLETE func = cont_list[i].func;
862
863 // OBSOLETE /* Call the function to handle this deferrd stab. */
864 // OBSOLETE err = (*func) (objfile, sym, stabs);
865 // OBSOLETE if (err)
866 // OBSOLETE error ("Internal error: unable to resolve stab.\n");
867 // OBSOLETE }
868
869 // OBSOLETE /* Restore our caller's state. */
870 // OBSOLETE symbuf_idx = save_symbuf_idx;
871 // OBSOLETE symbuf_end = save_symbuf_end;
872 // OBSOLETE symnum = save_symnum;
873 // OBSOLETE cont_count = 0;
874 // OBSOLETE }
875 #endif /* OBSOLETE CFront */
876
877 /* Name of last function encountered. Used in Solaris to approximate
878 object file boundaries. */
879 static char *last_function_name;
880
881 /* The address in memory of the string table of the object file we are
882 reading (which might not be the "main" object file, but might be a
883 shared library or some other dynamically loaded thing). This is
884 set by read_dbx_symtab when building psymtabs, and by
885 read_ofile_symtab when building symtabs, and is used only by
886 next_symbol_text. FIXME: If that is true, we don't need it when
887 building psymtabs, right? */
888 static char *stringtab_global;
889
890 /* These variables are used to control fill_symbuf when the stabs
891 symbols are not contiguous (as may be the case when a COFF file is
892 linked using --split-by-reloc). */
893 static struct stab_section_list *symbuf_sections;
894 static unsigned int symbuf_left;
895 static unsigned int symbuf_read;
896
897 /* This variable stores a global stabs buffer, if we read stabs into
898 memory in one chunk in order to process relocations. */
899 static bfd_byte *stabs_data;
900
901 /* Refill the symbol table input buffer
902 and set the variables that control fetching entries from it.
903 Reports an error if no data available.
904 This function can read past the end of the symbol table
905 (into the string table) but this does no harm. */
906
907 static void
908 fill_symbuf (bfd *sym_bfd)
909 {
910 unsigned int count;
911 int nbytes;
912
913 if (stabs_data)
914 {
915 nbytes = sizeof (symbuf);
916 if (nbytes > symbuf_left)
917 nbytes = symbuf_left;
918 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
919 }
920 else if (symbuf_sections == NULL)
921 {
922 count = sizeof (symbuf);
923 nbytes = bfd_bread (symbuf, count, sym_bfd);
924 }
925 else
926 {
927 if (symbuf_left <= 0)
928 {
929 file_ptr filepos = symbuf_sections->section->filepos;
930 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
931 perror_with_name (bfd_get_filename (sym_bfd));
932 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
933 symbol_table_offset = filepos - symbuf_read;
934 symbuf_sections = symbuf_sections->next;
935 }
936
937 count = symbuf_left;
938 if (count > sizeof (symbuf))
939 count = sizeof (symbuf);
940 nbytes = bfd_bread (symbuf, count, sym_bfd);
941 }
942
943 if (nbytes < 0)
944 perror_with_name (bfd_get_filename (sym_bfd));
945 else if (nbytes == 0)
946 error ("Premature end of file reading symbol table");
947 symbuf_end = nbytes / symbol_size;
948 symbuf_idx = 0;
949 symbuf_left -= nbytes;
950 symbuf_read += nbytes;
951 }
952
953 static void
954 stabs_seek (int sym_offset)
955 {
956 if (stabs_data)
957 {
958 symbuf_read += sym_offset;
959 symbuf_left -= sym_offset;
960 }
961 else
962 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
963 }
964
965 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
966 { \
967 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
968 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
969 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
970 if (bfd_get_sign_extend_vma (abfd)) \
971 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
972 else \
973 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
974 }
975
976 /* Invariant: The symbol pointed to by symbuf_idx is the first one
977 that hasn't been swapped. Swap the symbol at the same time
978 that symbuf_idx is incremented. */
979
980 /* dbx allows the text of a symbol name to be continued into the
981 next symbol name! When such a continuation is encountered
982 (a \ at the end of the text of a name)
983 call this function to get the continuation. */
984
985 static char *
986 dbx_next_symbol_text (struct objfile *objfile)
987 {
988 struct internal_nlist nlist;
989
990 if (symbuf_idx == symbuf_end)
991 fill_symbuf (symfile_bfd);
992
993 symnum++;
994 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
995 OBJSTAT (objfile, n_stabs++);
996
997 symbuf_idx++;
998
999 return nlist.n_strx + stringtab_global + file_string_table_offset;
1000 }
1001 \f
1002 /* Initialize the list of bincls to contain none and have some
1003 allocated. */
1004
1005 static void
1006 init_bincl_list (int number, struct objfile *objfile)
1007 {
1008 bincls_allocated = number;
1009 next_bincl = bincl_list = (struct header_file_location *)
1010 xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
1011 }
1012
1013 /* Add a bincl to the list. */
1014
1015 static void
1016 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
1017 {
1018 if (next_bincl >= bincl_list + bincls_allocated)
1019 {
1020 int offset = next_bincl - bincl_list;
1021 bincls_allocated *= 2;
1022 bincl_list = (struct header_file_location *)
1023 xmrealloc (pst->objfile->md, (char *) bincl_list,
1024 bincls_allocated * sizeof (struct header_file_location));
1025 next_bincl = bincl_list + offset;
1026 }
1027 next_bincl->pst = pst;
1028 next_bincl->instance = instance;
1029 next_bincl++->name = name;
1030 }
1031
1032 /* Given a name, value pair, find the corresponding
1033 bincl in the list. Return the partial symtab associated
1034 with that header_file_location. */
1035
1036 static struct partial_symtab *
1037 find_corresponding_bincl_psymtab (char *name, int instance)
1038 {
1039 struct header_file_location *bincl;
1040
1041 for (bincl = bincl_list; bincl < next_bincl; bincl++)
1042 if (bincl->instance == instance
1043 && STREQ (name, bincl->name))
1044 return bincl->pst;
1045
1046 repeated_header_complaint (name, symnum);
1047 return (struct partial_symtab *) 0;
1048 }
1049
1050 /* Free the storage allocated for the bincl list. */
1051
1052 static void
1053 free_bincl_list (struct objfile *objfile)
1054 {
1055 xmfree (objfile->md, bincl_list);
1056 bincls_allocated = 0;
1057 }
1058
1059 static void
1060 do_free_bincl_list_cleanup (void *objfile)
1061 {
1062 free_bincl_list (objfile);
1063 }
1064
1065 static struct cleanup *
1066 make_cleanup_free_bincl_list (struct objfile *objfile)
1067 {
1068 return make_cleanup (do_free_bincl_list_cleanup, objfile);
1069 }
1070
1071 /* Set namestring based on nlist. If the string table index is invalid,
1072 give a fake name, and print a single error message per symbol file read,
1073 rather than abort the symbol reading or flood the user with messages. */
1074
1075 static char *
1076 set_namestring (struct objfile *objfile, struct internal_nlist nlist)
1077 {
1078 char *namestring;
1079
1080 if (((unsigned) nlist.n_strx + file_string_table_offset) >=
1081 DBX_STRINGTAB_SIZE (objfile))
1082 {
1083 complaint (&symfile_complaints, "bad string table offset in symbol %d",
1084 symnum);
1085 namestring = "<bad string table offset>";
1086 }
1087 else
1088 namestring = nlist.n_strx + file_string_table_offset +
1089 DBX_STRINGTAB (objfile);
1090 return namestring;
1091 }
1092
1093 /* Scan a SunOs dynamic symbol table for symbols of interest and
1094 add them to the minimal symbol table. */
1095
1096 static void
1097 read_dbx_dynamic_symtab (struct objfile *objfile)
1098 {
1099 bfd *abfd = objfile->obfd;
1100 struct cleanup *back_to;
1101 int counter;
1102 long dynsym_size;
1103 long dynsym_count;
1104 asymbol **dynsyms;
1105 asymbol **symptr;
1106 arelent **relptr;
1107 long dynrel_size;
1108 long dynrel_count;
1109 arelent **dynrels;
1110 CORE_ADDR sym_value;
1111 char *name;
1112
1113 /* Check that the symbol file has dynamic symbols that we know about.
1114 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1115 on a sun4 host (and vice versa) and bfd is not configured
1116 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1117 so we ignore the dynamic symbols in this case. */
1118 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1119 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1120 || bfd_get_arch (abfd) == bfd_arch_unknown)
1121 return;
1122
1123 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1124 if (dynsym_size < 0)
1125 return;
1126
1127 dynsyms = (asymbol **) xmalloc (dynsym_size);
1128 back_to = make_cleanup (xfree, dynsyms);
1129
1130 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1131 if (dynsym_count < 0)
1132 {
1133 do_cleanups (back_to);
1134 return;
1135 }
1136
1137 /* Enter dynamic symbols into the minimal symbol table
1138 if this is a stripped executable. */
1139 if (bfd_get_symcount (abfd) <= 0)
1140 {
1141 symptr = dynsyms;
1142 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1143 {
1144 asymbol *sym = *symptr;
1145 asection *sec;
1146 int type;
1147
1148 sec = bfd_get_section (sym);
1149
1150 /* BFD symbols are section relative. */
1151 sym_value = sym->value + sec->vma;
1152
1153 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1154 {
1155 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1156 type = N_TEXT;
1157 }
1158 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1159 {
1160 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1161 type = N_DATA;
1162 }
1163 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1164 {
1165 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1166 type = N_BSS;
1167 }
1168 else
1169 continue;
1170
1171 if (sym->flags & BSF_GLOBAL)
1172 type |= N_EXT;
1173
1174 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1175 type, objfile);
1176 }
1177 }
1178
1179 /* Symbols from shared libraries have a dynamic relocation entry
1180 that points to the associated slot in the procedure linkage table.
1181 We make a mininal symbol table entry with type mst_solib_trampoline
1182 at the address in the procedure linkage table. */
1183 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1184 if (dynrel_size < 0)
1185 {
1186 do_cleanups (back_to);
1187 return;
1188 }
1189
1190 dynrels = (arelent **) xmalloc (dynrel_size);
1191 make_cleanup (xfree, dynrels);
1192
1193 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1194 if (dynrel_count < 0)
1195 {
1196 do_cleanups (back_to);
1197 return;
1198 }
1199
1200 for (counter = 0, relptr = dynrels;
1201 counter < dynrel_count;
1202 counter++, relptr++)
1203 {
1204 arelent *rel = *relptr;
1205 CORE_ADDR address =
1206 rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1207
1208 switch (bfd_get_arch (abfd))
1209 {
1210 case bfd_arch_sparc:
1211 if (rel->howto->type != RELOC_JMP_SLOT)
1212 continue;
1213 break;
1214 case bfd_arch_m68k:
1215 /* `16' is the type BFD produces for a jump table relocation. */
1216 if (rel->howto->type != 16)
1217 continue;
1218
1219 /* Adjust address in the jump table to point to
1220 the start of the bsr instruction. */
1221 address -= 2;
1222 break;
1223 default:
1224 continue;
1225 }
1226
1227 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1228 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1229 objfile);
1230 }
1231
1232 do_cleanups (back_to);
1233 }
1234
1235 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1236 static CORE_ADDR
1237 find_stab_function_addr (char *namestring, char *filename,
1238 struct objfile *objfile)
1239 {
1240 struct minimal_symbol *msym;
1241 char *p;
1242 int n;
1243
1244 p = strchr (namestring, ':');
1245 if (p == NULL)
1246 p = namestring;
1247 n = p - namestring;
1248 p = alloca (n + 2);
1249 strncpy (p, namestring, n);
1250 p[n] = 0;
1251
1252 msym = lookup_minimal_symbol (p, filename, objfile);
1253 if (msym == NULL)
1254 {
1255 /* Sun Fortran appends an underscore to the minimal symbol name,
1256 try again with an appended underscore if the minimal symbol
1257 was not found. */
1258 p[n] = '_';
1259 p[n + 1] = 0;
1260 msym = lookup_minimal_symbol (p, filename, objfile);
1261 }
1262
1263 if (msym == NULL && filename != NULL)
1264 {
1265 /* Try again without the filename. */
1266 p[n] = 0;
1267 msym = lookup_minimal_symbol (p, NULL, objfile);
1268 }
1269 if (msym == NULL && filename != NULL)
1270 {
1271 /* And try again for Sun Fortran, but without the filename. */
1272 p[n] = '_';
1273 p[n + 1] = 0;
1274 msym = lookup_minimal_symbol (p, NULL, objfile);
1275 }
1276
1277 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1278 }
1279 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1280
1281 static void
1282 function_outside_compilation_unit_complaint (const char *arg1)
1283 {
1284 complaint (&symfile_complaints,
1285 "function `%s' appears to be defined outside of all compilation units",
1286 arg1);
1287 }
1288
1289 /* Setup partial_symtab's describing each source file for which
1290 debugging information is available. */
1291
1292 static void
1293 read_dbx_symtab (struct objfile *objfile)
1294 {
1295 register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1296 struct internal_nlist nlist;
1297 CORE_ADDR text_addr;
1298 int text_size;
1299
1300 register char *namestring;
1301 int nsl;
1302 int past_first_source_file = 0;
1303 CORE_ADDR last_o_file_start = 0;
1304 CORE_ADDR last_function_start = 0;
1305 struct cleanup *back_to;
1306 bfd *abfd;
1307 int textlow_not_set;
1308 int data_sect_index;
1309
1310 /* Current partial symtab */
1311 struct partial_symtab *pst;
1312
1313 /* List of current psymtab's include files */
1314 char **psymtab_include_list;
1315 int includes_allocated;
1316 int includes_used;
1317
1318 /* Index within current psymtab dependency list */
1319 struct partial_symtab **dependency_list;
1320 int dependencies_used, dependencies_allocated;
1321
1322 text_addr = DBX_TEXT_ADDR (objfile);
1323 text_size = DBX_TEXT_SIZE (objfile);
1324
1325 /* FIXME. We probably want to change stringtab_global rather than add this
1326 while processing every symbol entry. FIXME. */
1327 file_string_table_offset = 0;
1328 next_file_string_table_offset = 0;
1329
1330 stringtab_global = DBX_STRINGTAB (objfile);
1331
1332 pst = (struct partial_symtab *) 0;
1333
1334 includes_allocated = 30;
1335 includes_used = 0;
1336 psymtab_include_list = (char **) alloca (includes_allocated *
1337 sizeof (char *));
1338
1339 dependencies_allocated = 30;
1340 dependencies_used = 0;
1341 dependency_list =
1342 (struct partial_symtab **) alloca (dependencies_allocated *
1343 sizeof (struct partial_symtab *));
1344
1345 /* Init bincl list */
1346 init_bincl_list (20, objfile);
1347 back_to = make_cleanup_free_bincl_list (objfile);
1348
1349 last_source_file = NULL;
1350
1351 lowest_text_address = (CORE_ADDR) -1;
1352
1353 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1354 abfd = objfile->obfd;
1355 symbuf_end = symbuf_idx = 0;
1356 next_symbol_text_func = dbx_next_symbol_text;
1357 textlow_not_set = 1;
1358 has_line_numbers = 0;
1359
1360 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1361 to global and static variables. The stab for a global or static
1362 variable doesn't give us any indication of which section it's in,
1363 so we can't tell immediately which offset in
1364 objfile->section_offsets we should apply to the variable's
1365 address.
1366
1367 We could certainly find out which section contains the variable
1368 by looking up the variable's unrelocated address with
1369 find_pc_section, but that would be expensive; this is the
1370 function that constructs the partial symbol tables by examining
1371 every symbol in the entire executable, and it's
1372 performance-critical. So that expense would not be welcome. I'm
1373 not sure what to do about this at the moment.
1374
1375 What we have done for years is to simply assume that the .data
1376 section's offset is appropriate for all global and static
1377 variables. Recently, this was expanded to fall back to the .bss
1378 section's offset if there is no .data section, and then to the
1379 .rodata section's offset. */
1380 data_sect_index = objfile->sect_index_data;
1381 if (data_sect_index == -1)
1382 data_sect_index = SECT_OFF_BSS (objfile);
1383 gdb_assert (data_sect_index != -1);
1384
1385 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1386 {
1387 /* Get the symbol for this run and pull out some info */
1388 QUIT; /* allow this to be interruptable */
1389 if (symbuf_idx == symbuf_end)
1390 fill_symbuf (abfd);
1391 bufp = &symbuf[symbuf_idx++];
1392
1393 /*
1394 * Special case to speed up readin.
1395 */
1396 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1397 {
1398 has_line_numbers = 1;
1399 continue;
1400 }
1401
1402 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1403 OBJSTAT (objfile, n_stabs++);
1404
1405 /* Ok. There is a lot of code duplicated in the rest of this
1406 switch statement (for efficiency reasons). Since I don't
1407 like duplicating code, I will do my penance here, and
1408 describe the code which is duplicated:
1409
1410 *) The assignment to namestring.
1411 *) The call to strchr.
1412 *) The addition of a partial symbol the the two partial
1413 symbol lists. This last is a large section of code, so
1414 I've imbedded it in the following macro.
1415 */
1416
1417 switch (nlist.n_type)
1418 {
1419 char *p;
1420 /*
1421 * Standard, external, non-debugger, symbols
1422 */
1423
1424 case N_TEXT | N_EXT:
1425 case N_NBTEXT | N_EXT:
1426 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1427 goto record_it;
1428
1429 case N_DATA | N_EXT:
1430 case N_NBDATA | N_EXT:
1431 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1432 goto record_it;
1433
1434 case N_BSS:
1435 case N_BSS | N_EXT:
1436 case N_NBBSS | N_EXT:
1437 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1438 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1439 goto record_it;
1440
1441 case N_ABS | N_EXT:
1442 record_it:
1443 namestring = set_namestring (objfile, nlist);
1444
1445 bss_ext_symbol:
1446 record_minimal_symbol (namestring, nlist.n_value,
1447 nlist.n_type, objfile); /* Always */
1448 continue;
1449
1450 /* Standard, local, non-debugger, symbols */
1451
1452 case N_NBTEXT:
1453
1454 /* We need to be able to deal with both N_FN or N_TEXT,
1455 because we have no way of knowing whether the sys-supplied ld
1456 or GNU ld was used to make the executable. Sequents throw
1457 in another wrinkle -- they renumbered N_FN. */
1458
1459 case N_FN:
1460 case N_FN_SEQ:
1461 case N_TEXT:
1462 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1463 namestring = set_namestring (objfile, nlist);
1464
1465 if ((namestring[0] == '-' && namestring[1] == 'l')
1466 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1467 && namestring[nsl - 2] == '.'))
1468 {
1469 if (objfile->ei.entry_point < nlist.n_value &&
1470 objfile->ei.entry_point >= last_o_file_start)
1471 {
1472 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
1473 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
1474 }
1475 if (past_first_source_file && pst
1476 /* The gould NP1 uses low values for .o and -l symbols
1477 which are not the address. */
1478 && nlist.n_value >= pst->textlow)
1479 {
1480 end_psymtab (pst, psymtab_include_list, includes_used,
1481 symnum * symbol_size,
1482 nlist.n_value > pst->texthigh
1483 ? nlist.n_value : pst->texthigh,
1484 dependency_list, dependencies_used, textlow_not_set);
1485 pst = (struct partial_symtab *) 0;
1486 includes_used = 0;
1487 dependencies_used = 0;
1488 }
1489 else
1490 past_first_source_file = 1;
1491 last_o_file_start = nlist.n_value;
1492 }
1493 else
1494 goto record_it;
1495 continue;
1496
1497 case N_DATA:
1498 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1499 goto record_it;
1500
1501 case N_UNDF | N_EXT:
1502 if (nlist.n_value != 0)
1503 {
1504 /* This is a "Fortran COMMON" symbol. See if the target
1505 environment knows where it has been relocated to. */
1506
1507 CORE_ADDR reladdr;
1508
1509 namestring = set_namestring (objfile, nlist);
1510 if (target_lookup_symbol (namestring, &reladdr))
1511 {
1512 continue; /* Error in lookup; ignore symbol for now. */
1513 }
1514 nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */
1515 nlist.n_value = reladdr;
1516 goto bss_ext_symbol;
1517 }
1518 continue; /* Just undefined, not COMMON */
1519
1520 case N_UNDF:
1521 if (processing_acc_compilation && nlist.n_strx == 1)
1522 {
1523 /* Deal with relative offsets in the string table
1524 used in ELF+STAB under Solaris. If we want to use the
1525 n_strx field, which contains the name of the file,
1526 we must adjust file_string_table_offset *before* calling
1527 set_namestring(). */
1528 past_first_source_file = 1;
1529 file_string_table_offset = next_file_string_table_offset;
1530 next_file_string_table_offset =
1531 file_string_table_offset + nlist.n_value;
1532 if (next_file_string_table_offset < file_string_table_offset)
1533 error ("string table offset backs up at %d", symnum);
1534 /* FIXME -- replace error() with complaint. */
1535 continue;
1536 }
1537 continue;
1538
1539 /* Lots of symbol types we can just ignore. */
1540
1541 case N_ABS:
1542 case N_NBDATA:
1543 case N_NBBSS:
1544 continue;
1545
1546 /* Keep going . . . */
1547
1548 /*
1549 * Special symbol types for GNU
1550 */
1551 case N_INDR:
1552 case N_INDR | N_EXT:
1553 case N_SETA:
1554 case N_SETA | N_EXT:
1555 case N_SETT:
1556 case N_SETT | N_EXT:
1557 case N_SETD:
1558 case N_SETD | N_EXT:
1559 case N_SETB:
1560 case N_SETB | N_EXT:
1561 case N_SETV:
1562 continue;
1563
1564 /*
1565 * Debugger symbols
1566 */
1567
1568 case N_SO:
1569 {
1570 CORE_ADDR valu;
1571 static int prev_so_symnum = -10;
1572 static int first_so_symnum;
1573 char *p;
1574 int prev_textlow_not_set;
1575
1576 valu = nlist.n_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1577
1578 prev_textlow_not_set = textlow_not_set;
1579
1580 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1581 /* A zero value is probably an indication for the SunPRO 3.0
1582 compiler. end_psymtab explicitly tests for zero, so
1583 don't relocate it. */
1584
1585 if (nlist.n_value == 0)
1586 {
1587 textlow_not_set = 1;
1588 valu = 0;
1589 }
1590 else
1591 textlow_not_set = 0;
1592 #else
1593 textlow_not_set = 0;
1594 #endif
1595 past_first_source_file = 1;
1596
1597 if (prev_so_symnum != symnum - 1)
1598 { /* Here if prev stab wasn't N_SO */
1599 first_so_symnum = symnum;
1600
1601 if (pst)
1602 {
1603 end_psymtab (pst, psymtab_include_list, includes_used,
1604 symnum * symbol_size,
1605 valu > pst->texthigh ? valu : pst->texthigh,
1606 dependency_list, dependencies_used,
1607 prev_textlow_not_set);
1608 pst = (struct partial_symtab *) 0;
1609 includes_used = 0;
1610 dependencies_used = 0;
1611 }
1612 }
1613
1614 prev_so_symnum = symnum;
1615
1616 /* End the current partial symtab and start a new one */
1617
1618 namestring = set_namestring (objfile, nlist);
1619
1620 /* Null name means end of .o file. Don't start a new one. */
1621 if (*namestring == '\000')
1622 continue;
1623
1624 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1625 The first one is a directory name; the second the file name.
1626 If pst exists, is empty, and has a filename ending in '/',
1627 we assume the previous N_SO was a directory name. */
1628
1629 p = strrchr (namestring, '/');
1630 if (p && *(p + 1) == '\000')
1631 continue; /* Simply ignore directory name SOs */
1632
1633 /* Some other compilers (C++ ones in particular) emit useless
1634 SOs for non-existant .c files. We ignore all subsequent SOs that
1635 immediately follow the first. */
1636
1637 if (!pst)
1638 pst = start_psymtab (objfile,
1639 namestring, valu,
1640 first_so_symnum * symbol_size,
1641 objfile->global_psymbols.next,
1642 objfile->static_psymbols.next);
1643 continue;
1644 }
1645
1646 case N_BINCL:
1647 {
1648 enum language tmp_language;
1649 /* Add this bincl to the bincl_list for future EXCLs. No
1650 need to save the string; it'll be around until
1651 read_dbx_symtab function returns */
1652
1653 namestring = set_namestring (objfile, nlist);
1654 tmp_language = deduce_language_from_filename (namestring);
1655
1656 /* Only change the psymtab's language if we've learned
1657 something useful (eg. tmp_language is not language_unknown).
1658 In addition, to match what start_subfile does, never change
1659 from C++ to C. */
1660 if (tmp_language != language_unknown
1661 && (tmp_language != language_c
1662 || psymtab_language != language_cplus))
1663 psymtab_language = tmp_language;
1664
1665 if (pst == NULL)
1666 {
1667 /* FIXME: we should not get here without a PST to work on.
1668 Attempt to recover. */
1669 complaint (&symfile_complaints,
1670 "N_BINCL %s not in entries for any file, at symtab pos %d",
1671 namestring, symnum);
1672 continue;
1673 }
1674 add_bincl_to_list (pst, namestring, nlist.n_value);
1675
1676 /* Mark down an include file in the current psymtab */
1677
1678 goto record_include_file;
1679 }
1680
1681 case N_SOL:
1682 {
1683 enum language tmp_language;
1684 /* Mark down an include file in the current psymtab */
1685
1686 namestring = set_namestring (objfile, nlist);
1687 tmp_language = deduce_language_from_filename (namestring);
1688
1689 /* Only change the psymtab's language if we've learned
1690 something useful (eg. tmp_language is not language_unknown).
1691 In addition, to match what start_subfile does, never change
1692 from C++ to C. */
1693 if (tmp_language != language_unknown
1694 && (tmp_language != language_c
1695 || psymtab_language != language_cplus))
1696 psymtab_language = tmp_language;
1697
1698 /* In C++, one may expect the same filename to come round many
1699 times, when code is coming alternately from the main file
1700 and from inline functions in other files. So I check to see
1701 if this is a file we've seen before -- either the main
1702 source file, or a previously included file.
1703
1704 This seems to be a lot of time to be spending on N_SOL, but
1705 things like "break c-exp.y:435" need to work (I
1706 suppose the psymtab_include_list could be hashed or put
1707 in a binary tree, if profiling shows this is a major hog). */
1708 if (pst && STREQ (namestring, pst->filename))
1709 continue;
1710 {
1711 register int i;
1712 for (i = 0; i < includes_used; i++)
1713 if (STREQ (namestring, psymtab_include_list[i]))
1714 {
1715 i = -1;
1716 break;
1717 }
1718 if (i == -1)
1719 continue;
1720 }
1721
1722 record_include_file:
1723
1724 psymtab_include_list[includes_used++] = namestring;
1725 if (includes_used >= includes_allocated)
1726 {
1727 char **orig = psymtab_include_list;
1728
1729 psymtab_include_list = (char **)
1730 alloca ((includes_allocated *= 2) *
1731 sizeof (char *));
1732 memcpy (psymtab_include_list, orig,
1733 includes_used * sizeof (char *));
1734 }
1735 continue;
1736 }
1737 case N_LSYM: /* Typedef or automatic variable. */
1738 case N_STSYM: /* Data seg var -- static */
1739 case N_LCSYM: /* BSS " */
1740 case N_ROSYM: /* Read-only data seg var -- static. */
1741 case N_NBSTS: /* Gould nobase. */
1742 case N_NBLCS: /* symbols. */
1743 case N_FUN:
1744 case N_GSYM: /* Global (extern) variable; can be
1745 data or bss (sigh FIXME). */
1746
1747 /* Following may probably be ignored; I'll leave them here
1748 for now (until I do Pascal and Modula 2 extensions). */
1749
1750 case N_PC: /* I may or may not need this; I
1751 suspect not. */
1752 case N_M2C: /* I suspect that I can ignore this here. */
1753 case N_SCOPE: /* Same. */
1754
1755 namestring = set_namestring (objfile, nlist);
1756
1757 /* See if this is an end of function stab. */
1758 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1759 {
1760 CORE_ADDR valu;
1761
1762 /* It's value is the size (in bytes) of the function for
1763 function relative stabs, or the address of the function's
1764 end for old style stabs. */
1765 valu = nlist.n_value + last_function_start;
1766 if (pst->texthigh == 0 || valu > pst->texthigh)
1767 pst->texthigh = valu;
1768 break;
1769 }
1770
1771 p = (char *) strchr (namestring, ':');
1772 if (!p)
1773 continue; /* Not a debugging symbol. */
1774
1775
1776
1777 /* Main processing section for debugging symbols which
1778 the initial read through the symbol tables needs to worry
1779 about. If we reach this point, the symbol which we are
1780 considering is definitely one we are interested in.
1781 p must also contain the (valid) index into the namestring
1782 which indicates the debugging type symbol. */
1783
1784 switch (p[1])
1785 {
1786 case 'S':
1787 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1788 #ifdef STATIC_TRANSFORM_NAME
1789 namestring = STATIC_TRANSFORM_NAME (namestring);
1790 #endif
1791 add_psymbol_to_list (namestring, p - namestring,
1792 VAR_DOMAIN, LOC_STATIC,
1793 &objfile->static_psymbols,
1794 0, nlist.n_value,
1795 psymtab_language, objfile);
1796 continue;
1797 case 'G':
1798 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1799 /* The addresses in these entries are reported to be
1800 wrong. See the code that reads 'G's for symtabs. */
1801 add_psymbol_to_list (namestring, p - namestring,
1802 VAR_DOMAIN, LOC_STATIC,
1803 &objfile->global_psymbols,
1804 0, nlist.n_value,
1805 psymtab_language, objfile);
1806 continue;
1807
1808 case 'T':
1809 /* When a 'T' entry is defining an anonymous enum, it
1810 may have a name which is the empty string, or a
1811 single space. Since they're not really defining a
1812 symbol, those shouldn't go in the partial symbol
1813 table. We do pick up the elements of such enums at
1814 'check_enum:', below. */
1815 if (p >= namestring + 2
1816 || (p == namestring + 1
1817 && namestring[0] != ' '))
1818 {
1819 add_psymbol_to_list (namestring, p - namestring,
1820 STRUCT_DOMAIN, LOC_TYPEDEF,
1821 &objfile->static_psymbols,
1822 nlist.n_value, 0,
1823 psymtab_language, objfile);
1824 if (p[2] == 't')
1825 {
1826 /* Also a typedef with the same name. */
1827 add_psymbol_to_list (namestring, p - namestring,
1828 VAR_DOMAIN, LOC_TYPEDEF,
1829 &objfile->static_psymbols,
1830 nlist.n_value, 0,
1831 psymtab_language, objfile);
1832 p += 1;
1833 }
1834 #if 0 /* OBSOLETE CFront */
1835 // OBSOLETE /* The semantics of C++ state that "struct foo { ... }"
1836 // OBSOLETE also defines a typedef for "foo". Unfortuantely, cfront
1837 // OBSOLETE never makes the typedef when translating from C++ to C.
1838 // OBSOLETE We make the typedef here so that "ptype foo" works as
1839 // OBSOLETE expected for cfront translated code. */
1840 // OBSOLETE else if (psymtab_language == language_cplus)
1841 // OBSOLETE {
1842 // OBSOLETE /* Also a typedef with the same name. */
1843 // OBSOLETE add_psymbol_to_list (namestring, p - namestring,
1844 // OBSOLETE VAR_DOMAIN, LOC_TYPEDEF,
1845 // OBSOLETE &objfile->static_psymbols,
1846 // OBSOLETE nlist.n_value, 0,
1847 // OBSOLETE psymtab_language, objfile);
1848 // OBSOLETE }
1849 #endif /* OBSOLETE CFront */
1850 }
1851 goto check_enum;
1852 case 't':
1853 if (p != namestring) /* a name is there, not just :T... */
1854 {
1855 add_psymbol_to_list (namestring, p - namestring,
1856 VAR_DOMAIN, LOC_TYPEDEF,
1857 &objfile->static_psymbols,
1858 nlist.n_value, 0,
1859 psymtab_language, objfile);
1860 }
1861 check_enum:
1862 /* If this is an enumerated type, we need to
1863 add all the enum constants to the partial symbol
1864 table. This does not cover enums without names, e.g.
1865 "enum {a, b} c;" in C, but fortunately those are
1866 rare. There is no way for GDB to find those from the
1867 enum type without spending too much time on it. Thus
1868 to solve this problem, the compiler needs to put out the
1869 enum in a nameless type. GCC2 does this. */
1870
1871 /* We are looking for something of the form
1872 <name> ":" ("t" | "T") [<number> "="] "e"
1873 {<constant> ":" <value> ","} ";". */
1874
1875 /* Skip over the colon and the 't' or 'T'. */
1876 p += 2;
1877 /* This type may be given a number. Also, numbers can come
1878 in pairs like (0,26). Skip over it. */
1879 while ((*p >= '0' && *p <= '9')
1880 || *p == '(' || *p == ',' || *p == ')'
1881 || *p == '=')
1882 p++;
1883
1884 if (*p++ == 'e')
1885 {
1886 /* The aix4 compiler emits extra crud before the members. */
1887 if (*p == '-')
1888 {
1889 /* Skip over the type (?). */
1890 while (*p != ':')
1891 p++;
1892
1893 /* Skip over the colon. */
1894 p++;
1895 }
1896
1897 /* We have found an enumerated type. */
1898 /* According to comments in read_enum_type
1899 a comma could end it instead of a semicolon.
1900 I don't know where that happens.
1901 Accept either. */
1902 while (*p && *p != ';' && *p != ',')
1903 {
1904 char *q;
1905
1906 /* Check for and handle cretinous dbx symbol name
1907 continuation! */
1908 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1909 p = next_symbol_text (objfile);
1910
1911 /* Point to the character after the name
1912 of the enum constant. */
1913 for (q = p; *q && *q != ':'; q++)
1914 ;
1915 /* Note that the value doesn't matter for
1916 enum constants in psymtabs, just in symtabs. */
1917 add_psymbol_to_list (p, q - p,
1918 VAR_DOMAIN, LOC_CONST,
1919 &objfile->static_psymbols, 0,
1920 0, psymtab_language, objfile);
1921 /* Point past the name. */
1922 p = q;
1923 /* Skip over the value. */
1924 while (*p && *p != ',')
1925 p++;
1926 /* Advance past the comma. */
1927 if (*p)
1928 p++;
1929 }
1930 }
1931 continue;
1932 case 'c':
1933 /* Constant, e.g. from "const" in Pascal. */
1934 add_psymbol_to_list (namestring, p - namestring,
1935 VAR_DOMAIN, LOC_CONST,
1936 &objfile->static_psymbols, nlist.n_value,
1937 0, psymtab_language, objfile);
1938 continue;
1939
1940 case 'f':
1941 if (! pst)
1942 {
1943 int name_len = p - namestring;
1944 char *name = xmalloc (name_len + 1);
1945 memcpy (name, namestring, name_len);
1946 name[name_len] = '\0';
1947 function_outside_compilation_unit_complaint (name);
1948 xfree (name);
1949 }
1950 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1951 /* Kludges for ELF/STABS with Sun ACC */
1952 last_function_name = namestring;
1953 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1954 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1955 value for the bottom of the text seg in those cases. */
1956 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1957 SECT_OFF_TEXT (objfile)))
1958 {
1959 CORE_ADDR minsym_valu =
1960 find_stab_function_addr (namestring, pst->filename, objfile);
1961 /* find_stab_function_addr will return 0 if the minimal
1962 symbol wasn't found. (Unfortunately, this might also
1963 be a valid address.) Anyway, if it *does* return 0,
1964 it is likely that the value was set correctly to begin
1965 with... */
1966 if (minsym_valu != 0)
1967 nlist.n_value = minsym_valu;
1968 }
1969 if (pst && textlow_not_set)
1970 {
1971 pst->textlow = nlist.n_value;
1972 textlow_not_set = 0;
1973 }
1974 #endif
1975 /* End kludge. */
1976
1977 /* Keep track of the start of the last function so we
1978 can handle end of function symbols. */
1979 last_function_start = nlist.n_value;
1980
1981 /* In reordered executables this function may lie outside
1982 the bounds created by N_SO symbols. If that's the case
1983 use the address of this function as the low bound for
1984 the partial symbol table. */
1985 if (pst
1986 && (textlow_not_set
1987 || (nlist.n_value < pst->textlow
1988 && (nlist.n_value
1989 != ANOFFSET (objfile->section_offsets,
1990 SECT_OFF_TEXT (objfile))))))
1991 {
1992 pst->textlow = nlist.n_value;
1993 textlow_not_set = 0;
1994 }
1995 add_psymbol_to_list (namestring, p - namestring,
1996 VAR_DOMAIN, LOC_BLOCK,
1997 &objfile->static_psymbols,
1998 0, nlist.n_value,
1999 psymtab_language, objfile);
2000 continue;
2001
2002 /* Global functions were ignored here, but now they
2003 are put into the global psymtab like one would expect.
2004 They're also in the minimal symbol table. */
2005 case 'F':
2006 if (! pst)
2007 {
2008 int name_len = p - namestring;
2009 char *name = xmalloc (name_len + 1);
2010 memcpy (name, namestring, name_len);
2011 name[name_len] = '\0';
2012 function_outside_compilation_unit_complaint (name);
2013 xfree (name);
2014 }
2015 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2016 /* Kludges for ELF/STABS with Sun ACC */
2017 last_function_name = namestring;
2018 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2019 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
2020 value for the bottom of the text seg in those cases. */
2021 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
2022 SECT_OFF_TEXT (objfile)))
2023 {
2024 CORE_ADDR minsym_valu =
2025 find_stab_function_addr (namestring, pst->filename, objfile);
2026 /* find_stab_function_addr will return 0 if the minimal
2027 symbol wasn't found. (Unfortunately, this might also
2028 be a valid address.) Anyway, if it *does* return 0,
2029 it is likely that the value was set correctly to begin
2030 with... */
2031 if (minsym_valu != 0)
2032 nlist.n_value = minsym_valu;
2033 }
2034 if (pst && textlow_not_set)
2035 {
2036 pst->textlow = nlist.n_value;
2037 textlow_not_set = 0;
2038 }
2039 #endif
2040 /* End kludge. */
2041
2042 /* Keep track of the start of the last function so we
2043 can handle end of function symbols. */
2044 last_function_start = nlist.n_value;
2045
2046 /* In reordered executables this function may lie outside
2047 the bounds created by N_SO symbols. If that's the case
2048 use the address of this function as the low bound for
2049 the partial symbol table. */
2050 if (pst
2051 && (textlow_not_set
2052 || (nlist.n_value < pst->textlow
2053 && (nlist.n_value
2054 != ANOFFSET (objfile->section_offsets,
2055 SECT_OFF_TEXT (objfile))))))
2056 {
2057 pst->textlow = nlist.n_value;
2058 textlow_not_set = 0;
2059 }
2060 add_psymbol_to_list (namestring, p - namestring,
2061 VAR_DOMAIN, LOC_BLOCK,
2062 &objfile->global_psymbols,
2063 0, nlist.n_value,
2064 psymtab_language, objfile);
2065 continue;
2066
2067 /* Two things show up here (hopefully); static symbols of
2068 local scope (static used inside braces) or extensions
2069 of structure symbols. We can ignore both. */
2070 case 'V':
2071 case '(':
2072 case '0':
2073 case '1':
2074 case '2':
2075 case '3':
2076 case '4':
2077 case '5':
2078 case '6':
2079 case '7':
2080 case '8':
2081 case '9':
2082 case '-':
2083 case '#': /* for symbol identification (used in live ranges) */
2084 #if 0 /* OBSOLETE CFront */
2085 // OBSOLETE /* added to support cfront stabs strings */
2086 // OBSOLETE case 'Z': /* for definition continuations */
2087 // OBSOLETE case 'P': /* for prototypes */
2088 #endif /* OBSOLETE CFront */
2089 continue;
2090
2091 case ':':
2092 /* It is a C++ nested symbol. We don't need to record it
2093 (I don't think); if we try to look up foo::bar::baz,
2094 then symbols for the symtab containing foo should get
2095 read in, I think. */
2096 /* Someone says sun cc puts out symbols like
2097 /foo/baz/maclib::/usr/local/bin/maclib,
2098 which would get here with a symbol type of ':'. */
2099 continue;
2100
2101 default:
2102 /* Unexpected symbol descriptor. The second and subsequent stabs
2103 of a continued stab can show up here. The question is
2104 whether they ever can mimic a normal stab--it would be
2105 nice if not, since we certainly don't want to spend the
2106 time searching to the end of every string looking for
2107 a backslash. */
2108
2109 complaint (&symfile_complaints, "unknown symbol descriptor `%c'",
2110 p[1]);
2111
2112 /* Ignore it; perhaps it is an extension that we don't
2113 know about. */
2114 continue;
2115 }
2116
2117 case N_EXCL:
2118
2119 namestring = set_namestring (objfile, nlist);
2120
2121 /* Find the corresponding bincl and mark that psymtab on the
2122 psymtab dependency list */
2123 {
2124 struct partial_symtab *needed_pst =
2125 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2126
2127 /* If this include file was defined earlier in this file,
2128 leave it alone. */
2129 if (needed_pst == pst)
2130 continue;
2131
2132 if (needed_pst)
2133 {
2134 int i;
2135 int found = 0;
2136
2137 for (i = 0; i < dependencies_used; i++)
2138 if (dependency_list[i] == needed_pst)
2139 {
2140 found = 1;
2141 break;
2142 }
2143
2144 /* If it's already in the list, skip the rest. */
2145 if (found)
2146 continue;
2147
2148 dependency_list[dependencies_used++] = needed_pst;
2149 if (dependencies_used >= dependencies_allocated)
2150 {
2151 struct partial_symtab **orig = dependency_list;
2152 dependency_list =
2153 (struct partial_symtab **)
2154 alloca ((dependencies_allocated *= 2)
2155 * sizeof (struct partial_symtab *));
2156 memcpy (dependency_list, orig,
2157 (dependencies_used
2158 * sizeof (struct partial_symtab *)));
2159 #ifdef DEBUG_INFO
2160 fprintf_unfiltered (gdb_stderr, "Had to reallocate dependency list.\n");
2161 fprintf_unfiltered (gdb_stderr, "New dependencies allocated: %d\n",
2162 dependencies_allocated);
2163 #endif
2164 }
2165 }
2166 }
2167 continue;
2168
2169 case N_ENDM:
2170 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2171 /* Solaris 2 end of module, finish current partial symbol table.
2172 end_psymtab will set pst->texthigh to the proper value, which
2173 is necessary if a module compiled without debugging info
2174 follows this module. */
2175 if (pst)
2176 {
2177 end_psymtab (pst, psymtab_include_list, includes_used,
2178 symnum * symbol_size,
2179 (CORE_ADDR) 0,
2180 dependency_list, dependencies_used, textlow_not_set);
2181 pst = (struct partial_symtab *) 0;
2182 includes_used = 0;
2183 dependencies_used = 0;
2184 }
2185 #endif
2186 continue;
2187
2188 case N_RBRAC:
2189 #ifdef HANDLE_RBRAC
2190 HANDLE_RBRAC (nlist.n_value);
2191 continue;
2192 #endif
2193 case N_EINCL:
2194 case N_DSLINE:
2195 case N_BSLINE:
2196 case N_SSYM: /* Claim: Structure or union element.
2197 Hopefully, I can ignore this. */
2198 case N_ENTRY: /* Alternate entry point; can ignore. */
2199 case N_MAIN: /* Can definitely ignore this. */
2200 case N_CATCH: /* These are GNU C++ extensions */
2201 case N_EHDECL: /* that can safely be ignored here. */
2202 case N_LENG:
2203 case N_BCOMM:
2204 case N_ECOMM:
2205 case N_ECOML:
2206 case N_FNAME:
2207 case N_SLINE:
2208 case N_RSYM:
2209 case N_PSYM:
2210 case N_LBRAC:
2211 case N_NSYMS: /* Ultrix 4.0: symbol count */
2212 case N_DEFD: /* GNU Modula-2 */
2213 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2214
2215 case N_OBJ: /* useless types from Solaris */
2216 case N_OPT:
2217 /* These symbols aren't interesting; don't worry about them */
2218
2219 continue;
2220
2221 default:
2222 /* If we haven't found it yet, ignore it. It's probably some
2223 new type we don't know about yet. */
2224 unknown_symtype_complaint (local_hex_string (nlist.n_type));
2225 continue;
2226 }
2227 }
2228
2229 /* If there's stuff to be cleaned up, clean it up. */
2230 if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
2231 /*FIXME, does this have a bug at start address 0? */
2232 && last_o_file_start
2233 && objfile->ei.entry_point < nlist.n_value
2234 && objfile->ei.entry_point >= last_o_file_start)
2235 {
2236 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
2237 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
2238 }
2239
2240 if (pst)
2241 {
2242 /* Don't set pst->texthigh lower than it already is. */
2243 CORE_ADDR text_end =
2244 (lowest_text_address == (CORE_ADDR) -1
2245 ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
2246 : lowest_text_address)
2247 + text_size;
2248
2249 end_psymtab (pst, psymtab_include_list, includes_used,
2250 symnum * symbol_size,
2251 text_end > pst->texthigh ? text_end : pst->texthigh,
2252 dependency_list, dependencies_used, textlow_not_set);
2253 }
2254
2255 do_cleanups (back_to);
2256 }
2257
2258 /* Allocate and partially fill a partial symtab. It will be
2259 completely filled at the end of the symbol list.
2260
2261 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2262 is the address relative to which its symbols are (incremental) or 0
2263 (normal). */
2264
2265
2266 static struct partial_symtab *
2267 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2268 int ldsymoff, struct partial_symbol **global_syms,
2269 struct partial_symbol **static_syms)
2270 {
2271 struct partial_symtab *result =
2272 start_psymtab_common (objfile, objfile->section_offsets,
2273 filename, textlow, global_syms, static_syms);
2274
2275 result->read_symtab_private = (char *)
2276 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));
2277 LDSYMOFF (result) = ldsymoff;
2278 result->read_symtab = dbx_psymtab_to_symtab;
2279 SYMBOL_SIZE (result) = symbol_size;
2280 SYMBOL_OFFSET (result) = symbol_table_offset;
2281 STRING_OFFSET (result) = string_table_offset;
2282 FILE_STRING_OFFSET (result) = file_string_table_offset;
2283
2284 /* If we're handling an ELF file, drag some section-relocation info
2285 for this source file out of the ELF symbol table, to compensate for
2286 Sun brain death. This replaces the section_offsets in this psymtab,
2287 if successful. */
2288 elfstab_offset_sections (objfile, result);
2289
2290 /* Deduce the source language from the filename for this psymtab. */
2291 psymtab_language = deduce_language_from_filename (filename);
2292
2293 return result;
2294 }
2295
2296 /* Close off the current usage of PST.
2297 Returns PST or NULL if the partial symtab was empty and thrown away.
2298
2299 FIXME: List variables and peculiarities of same. */
2300
2301 struct partial_symtab *
2302 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
2303 int capping_symbol_offset, CORE_ADDR capping_text,
2304 struct partial_symtab **dependency_list, int number_dependencies,
2305 int textlow_not_set)
2306 {
2307 int i;
2308 struct objfile *objfile = pst->objfile;
2309
2310 if (capping_symbol_offset != -1)
2311 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2312 pst->texthigh = capping_text;
2313
2314 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2315 /* Under Solaris, the N_SO symbols always have a value of 0,
2316 instead of the usual address of the .o file. Therefore,
2317 we have to do some tricks to fill in texthigh and textlow.
2318 The first trick is: if we see a static
2319 or global function, and the textlow for the current pst
2320 is not set (ie: textlow_not_set), then we use that function's
2321 address for the textlow of the pst. */
2322
2323 /* Now, to fill in texthigh, we remember the last function seen
2324 in the .o file. Also, there's a hack in
2325 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2326 to here via the misc_info field. Therefore, we can fill in
2327 a reliable texthigh by taking the address plus size of the
2328 last function in the file. */
2329
2330 if (pst->texthigh == 0 && last_function_name)
2331 {
2332 char *p;
2333 int n;
2334 struct minimal_symbol *minsym;
2335
2336 p = strchr (last_function_name, ':');
2337 if (p == NULL)
2338 p = last_function_name;
2339 n = p - last_function_name;
2340 p = alloca (n + 2);
2341 strncpy (p, last_function_name, n);
2342 p[n] = 0;
2343
2344 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2345 if (minsym == NULL)
2346 {
2347 /* Sun Fortran appends an underscore to the minimal symbol name,
2348 try again with an appended underscore if the minimal symbol
2349 was not found. */
2350 p[n] = '_';
2351 p[n + 1] = 0;
2352 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2353 }
2354
2355 if (minsym)
2356 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2357
2358 last_function_name = NULL;
2359 }
2360
2361 /* this test will be true if the last .o file is only data */
2362 if (textlow_not_set)
2363 pst->textlow = pst->texthigh;
2364 else
2365 {
2366 struct partial_symtab *p1;
2367
2368 /* If we know our own starting text address, then walk through all other
2369 psymtabs for this objfile, and if any didn't know their ending text
2370 address, set it to our starting address. Take care to not set our
2371 own ending address to our starting address, nor to set addresses on
2372 `dependency' files that have both textlow and texthigh zero. */
2373
2374 ALL_OBJFILE_PSYMTABS (objfile, p1)
2375 {
2376 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2377 {
2378 p1->texthigh = pst->textlow;
2379 /* if this file has only data, then make textlow match texthigh */
2380 if (p1->textlow == 0)
2381 p1->textlow = p1->texthigh;
2382 }
2383 }
2384 }
2385
2386 /* End of kludge for patching Solaris textlow and texthigh. */
2387 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2388
2389 pst->n_global_syms =
2390 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
2391 pst->n_static_syms =
2392 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
2393
2394 pst->number_of_dependencies = number_dependencies;
2395 if (number_dependencies)
2396 {
2397 pst->dependencies = (struct partial_symtab **)
2398 obstack_alloc (&objfile->psymbol_obstack,
2399 number_dependencies * sizeof (struct partial_symtab *));
2400 memcpy (pst->dependencies, dependency_list,
2401 number_dependencies * sizeof (struct partial_symtab *));
2402 }
2403 else
2404 pst->dependencies = 0;
2405
2406 for (i = 0; i < num_includes; i++)
2407 {
2408 struct partial_symtab *subpst =
2409 allocate_psymtab (include_list[i], objfile);
2410
2411 /* Copy the sesction_offsets array from the main psymtab. */
2412 subpst->section_offsets = pst->section_offsets;
2413 subpst->read_symtab_private =
2414 (char *) obstack_alloc (&objfile->psymbol_obstack,
2415 sizeof (struct symloc));
2416 LDSYMOFF (subpst) =
2417 LDSYMLEN (subpst) =
2418 subpst->textlow =
2419 subpst->texthigh = 0;
2420
2421 /* We could save slight bits of space by only making one of these,
2422 shared by the entire set of include files. FIXME-someday. */
2423 subpst->dependencies = (struct partial_symtab **)
2424 obstack_alloc (&objfile->psymbol_obstack,
2425 sizeof (struct partial_symtab *));
2426 subpst->dependencies[0] = pst;
2427 subpst->number_of_dependencies = 1;
2428
2429 subpst->globals_offset =
2430 subpst->n_global_syms =
2431 subpst->statics_offset =
2432 subpst->n_static_syms = 0;
2433
2434 subpst->readin = 0;
2435 subpst->symtab = 0;
2436 subpst->read_symtab = pst->read_symtab;
2437 }
2438
2439 sort_pst_symbols (pst);
2440
2441 /* If there is already a psymtab or symtab for a file of this name, remove it.
2442 (If there is a symtab, more drastic things also happen.)
2443 This happens in VxWorks. */
2444 free_named_symtabs (pst->filename);
2445
2446 if (num_includes == 0
2447 && number_dependencies == 0
2448 && pst->n_global_syms == 0
2449 && pst->n_static_syms == 0
2450 && has_line_numbers == 0)
2451 {
2452 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2453 it is on the obstack, but we can forget to chain it on the list. */
2454 /* Empty psymtabs happen as a result of header files which don't have
2455 any symbols in them. There can be a lot of them. But this check
2456 is wrong, in that a psymtab with N_SLINE entries but nothing else
2457 is not empty, but we don't realize that. Fixing that without slowing
2458 things down might be tricky. */
2459
2460 discard_psymtab (pst);
2461
2462 /* Indicate that psymtab was thrown away. */
2463 pst = (struct partial_symtab *) NULL;
2464 }
2465 return pst;
2466 }
2467 \f
2468 static void
2469 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
2470 {
2471 struct cleanup *old_chain;
2472 int i;
2473
2474 if (!pst)
2475 return;
2476
2477 if (pst->readin)
2478 {
2479 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2480 pst->filename);
2481 return;
2482 }
2483
2484 /* Read in all partial symtabs on which this one is dependent */
2485 for (i = 0; i < pst->number_of_dependencies; i++)
2486 if (!pst->dependencies[i]->readin)
2487 {
2488 /* Inform about additional files that need to be read in. */
2489 if (info_verbose)
2490 {
2491 fputs_filtered (" ", gdb_stdout);
2492 wrap_here ("");
2493 fputs_filtered ("and ", gdb_stdout);
2494 wrap_here ("");
2495 printf_filtered ("%s...", pst->dependencies[i]->filename);
2496 wrap_here (""); /* Flush output */
2497 gdb_flush (gdb_stdout);
2498 }
2499 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
2500 }
2501
2502 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
2503 {
2504 /* Init stuff necessary for reading in symbols */
2505 stabsread_init ();
2506 buildsym_init ();
2507 old_chain = make_cleanup (really_free_pendings, 0);
2508 file_string_table_offset = FILE_STRING_OFFSET (pst);
2509 symbol_size = SYMBOL_SIZE (pst);
2510
2511 /* Read in this file's symbols */
2512 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2513 read_ofile_symtab (pst);
2514
2515 do_cleanups (old_chain);
2516 }
2517
2518 pst->readin = 1;
2519 }
2520
2521 /* Read in all of the symbols for a given psymtab for real.
2522 Be verbose about it if the user wants that. */
2523
2524 static void
2525 dbx_psymtab_to_symtab (struct partial_symtab *pst)
2526 {
2527 bfd *sym_bfd;
2528 struct cleanup *back_to = NULL;
2529
2530 if (!pst)
2531 return;
2532
2533 if (pst->readin)
2534 {
2535 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2536 pst->filename);
2537 return;
2538 }
2539
2540 if (LDSYMLEN (pst) || pst->number_of_dependencies)
2541 {
2542 /* Print the message now, before reading the string table,
2543 to avoid disconcerting pauses. */
2544 if (info_verbose)
2545 {
2546 printf_filtered ("Reading in symbols for %s...", pst->filename);
2547 gdb_flush (gdb_stdout);
2548 }
2549
2550 sym_bfd = pst->objfile->obfd;
2551
2552 next_symbol_text_func = dbx_next_symbol_text;
2553
2554 if (DBX_STAB_SECTION (pst->objfile))
2555 {
2556 stabs_data
2557 = symfile_relocate_debug_section (pst->objfile->obfd,
2558 DBX_STAB_SECTION (pst->objfile),
2559 NULL);
2560 if (stabs_data)
2561 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
2562 }
2563
2564 dbx_psymtab_to_symtab_1 (pst);
2565
2566 if (back_to)
2567 do_cleanups (back_to);
2568
2569 /* Match with global symbols. This only needs to be done once,
2570 after all of the symtabs and dependencies have been read in. */
2571 scan_file_globals (pst->objfile);
2572
2573 /* Finish up the debug error message. */
2574 if (info_verbose)
2575 printf_filtered ("done.\n");
2576 }
2577 }
2578
2579 /* Read in a defined section of a specific object file's symbols. */
2580
2581 static void
2582 read_ofile_symtab (struct partial_symtab *pst)
2583 {
2584 register char *namestring;
2585 register struct external_nlist *bufp;
2586 struct internal_nlist nlist;
2587 unsigned char type;
2588 unsigned max_symnum;
2589 register bfd *abfd;
2590 struct objfile *objfile;
2591 int sym_offset; /* Offset to start of symbols to read */
2592 int sym_size; /* Size of symbols to read */
2593 CORE_ADDR text_offset; /* Start of text segment for symbols */
2594 int text_size; /* Size of text segment for symbols */
2595 struct section_offsets *section_offsets;
2596
2597 objfile = pst->objfile;
2598 sym_offset = LDSYMOFF (pst);
2599 sym_size = LDSYMLEN (pst);
2600 text_offset = pst->textlow;
2601 text_size = pst->texthigh - pst->textlow;
2602 /* This cannot be simply objfile->section_offsets because of
2603 elfstab_offset_sections() which initializes the psymtab section
2604 offsets information in a special way, and that is different from
2605 objfile->section_offsets. */
2606 section_offsets = pst->section_offsets;
2607
2608 current_objfile = objfile;
2609 subfile_stack = NULL;
2610
2611 stringtab_global = DBX_STRINGTAB (objfile);
2612 last_source_file = NULL;
2613
2614 abfd = objfile->obfd;
2615 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
2616 symbuf_end = symbuf_idx = 0;
2617 symbuf_read = 0;
2618 symbuf_left = sym_offset + sym_size;
2619
2620 /* It is necessary to actually read one symbol *before* the start
2621 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2622 occurs before the N_SO symbol.
2623
2624 Detecting this in read_dbx_symtab
2625 would slow down initial readin, so we look for it here instead. */
2626 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2627 {
2628 stabs_seek (sym_offset - symbol_size);
2629 fill_symbuf (abfd);
2630 bufp = &symbuf[symbuf_idx++];
2631 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2632 OBJSTAT (objfile, n_stabs++);
2633
2634 namestring = set_namestring (objfile, nlist);
2635
2636 processing_gcc_compilation = 0;
2637 if (nlist.n_type == N_TEXT)
2638 {
2639 const char *tempstring = namestring;
2640
2641 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2642 processing_gcc_compilation = 1;
2643 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2644 processing_gcc_compilation = 2;
2645 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2646 ++tempstring;
2647 if (STREQN (tempstring, "__gnu_compiled", 14))
2648 processing_gcc_compilation = 2;
2649 }
2650
2651 /* Try to select a C++ demangling based on the compilation unit
2652 producer. */
2653
2654 #if 0
2655 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2656 know whether it will use the old style or v3 mangling. */
2657 if (processing_gcc_compilation)
2658 {
2659 if (AUTO_DEMANGLING)
2660 {
2661 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2662 }
2663 }
2664 #endif
2665 }
2666 else
2667 {
2668 /* The N_SO starting this symtab is the first symbol, so we
2669 better not check the symbol before it. I'm not this can
2670 happen, but it doesn't hurt to check for it. */
2671 stabs_seek (sym_offset);
2672 processing_gcc_compilation = 0;
2673 }
2674
2675 if (symbuf_idx == symbuf_end)
2676 fill_symbuf (abfd);
2677 bufp = &symbuf[symbuf_idx];
2678 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2679 error ("First symbol in segment of executable not a source symbol");
2680
2681 max_symnum = sym_size / symbol_size;
2682
2683 for (symnum = 0;
2684 symnum < max_symnum;
2685 symnum++)
2686 {
2687 QUIT; /* Allow this to be interruptable */
2688 if (symbuf_idx == symbuf_end)
2689 fill_symbuf (abfd);
2690 bufp = &symbuf[symbuf_idx++];
2691 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2692 OBJSTAT (objfile, n_stabs++);
2693
2694 type = bfd_h_get_8 (abfd, bufp->e_type);
2695
2696 namestring = set_namestring (objfile, nlist);
2697
2698 if (type & N_STAB)
2699 {
2700 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2701 namestring, section_offsets, objfile);
2702 }
2703 /* We skip checking for a new .o or -l file; that should never
2704 happen in this routine. */
2705 else if (type == N_TEXT)
2706 {
2707 /* I don't think this code will ever be executed, because
2708 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2709 the N_SO symbol which starts this source file.
2710 However, there is no reason not to accept
2711 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2712
2713 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2714 processing_gcc_compilation = 1;
2715 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2716 processing_gcc_compilation = 2;
2717
2718 #if 0
2719 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2720 know whether it will use the old style or v3 mangling. */
2721 if (AUTO_DEMANGLING)
2722 {
2723 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2724 }
2725 #endif
2726 }
2727 else if (type & N_EXT || type == (unsigned char) N_TEXT
2728 || type == (unsigned char) N_NBTEXT
2729 )
2730 {
2731 /* Global symbol: see if we came across a dbx defintion for
2732 a corresponding symbol. If so, store the value. Remove
2733 syms from the chain when their values are stored, but
2734 search the whole chain, as there may be several syms from
2735 different files with the same name. */
2736 /* This is probably not true. Since the files will be read
2737 in one at a time, each reference to a global symbol will
2738 be satisfied in each file as it appears. So we skip this
2739 section. */
2740 ;
2741 }
2742 }
2743
2744 current_objfile = NULL;
2745
2746 /* In a Solaris elf file, this variable, which comes from the
2747 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2748 which comes from pst->textlow is correct. */
2749 if (last_source_start_addr == 0)
2750 last_source_start_addr = text_offset;
2751
2752 /* In reordered executables last_source_start_addr may not be the
2753 lower bound for this symtab, instead use text_offset which comes
2754 from pst->textlow which is correct. */
2755 if (last_source_start_addr > text_offset)
2756 last_source_start_addr = text_offset;
2757
2758 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
2759
2760 #if 0 /* OBSOLETE CFront */
2761 // OBSOLETE /* Process items which we had to "process_later" due to dependencies
2762 // OBSOLETE on other stabs. */
2763 // OBSOLETE process_now (objfile);
2764 #endif /* OBSOLETE CFront */
2765 end_stabs ();
2766 }
2767 \f
2768
2769 /* This handles a single symbol from the symbol-file, building symbols
2770 into a GDB symtab. It takes these arguments and an implicit argument.
2771
2772 TYPE is the type field of the ".stab" symbol entry.
2773 DESC is the desc field of the ".stab" entry.
2774 VALU is the value field of the ".stab" entry.
2775 NAME is the symbol name, in our address space.
2776 SECTION_OFFSETS is a set of amounts by which the sections of this object
2777 file were relocated when it was loaded into memory.
2778 Note that these section_offsets are not the
2779 objfile->section_offsets but the pst->section_offsets.
2780 All symbols that refer
2781 to memory locations need to be offset by these amounts.
2782 OBJFILE is the object file from which we are reading symbols.
2783 It is used in end_symtab. */
2784
2785 void
2786 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2787 struct section_offsets *section_offsets,
2788 struct objfile *objfile)
2789 {
2790 #ifdef SUN_FIXED_LBRAC_BUG
2791 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2792 to correct the address of N_LBRAC's. If it is not defined, then
2793 we never need to correct the addresses. */
2794
2795 /* This records the last pc address we've seen. We depend on there being
2796 an SLINE or FUN or SO before the first LBRAC, since the variable does
2797 not get reset in between reads of different symbol files. */
2798 static CORE_ADDR last_pc_address;
2799 #endif
2800
2801 register struct context_stack *new;
2802 /* This remembers the address of the start of a function. It is used
2803 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2804 relative to the current function's start address. On systems
2805 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2806 used to relocate these symbol types rather than SECTION_OFFSETS. */
2807 static CORE_ADDR function_start_offset;
2808
2809 /* This holds the address of the start of a function, without the system
2810 peculiarities of function_start_offset. */
2811 static CORE_ADDR last_function_start;
2812
2813 /* If this is nonzero, we've seen an N_SLINE since the start of the
2814 current function. We use this to tell us to move the first sline
2815 to the beginning of the function regardless of what its given
2816 value is. */
2817 static int sline_found_in_function = 1;
2818
2819 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2820 file. Used to detect the SunPRO solaris compiler. */
2821 static int n_opt_found;
2822
2823 /* The stab type used for the definition of the last function.
2824 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2825 static int function_stab_type = 0;
2826
2827 if (!block_address_function_relative)
2828 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2829 function start address, so just use the text offset. */
2830 function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2831
2832 /* Something is wrong if we see real data before
2833 seeing a source file name. */
2834
2835 if (last_source_file == NULL && type != (unsigned char) N_SO)
2836 {
2837 /* Ignore any symbols which appear before an N_SO symbol.
2838 Currently no one puts symbols there, but we should deal
2839 gracefully with the case. A complain()t might be in order,
2840 but this should not be an error (). */
2841 return;
2842 }
2843
2844 switch (type)
2845 {
2846 case N_FUN:
2847 case N_FNAME:
2848
2849 if (*name == '\000')
2850 {
2851 /* This N_FUN marks the end of a function. This closes off the
2852 current block. */
2853
2854 if (context_stack_depth <= 0)
2855 {
2856 lbrac_mismatch_complaint (symnum);
2857 break;
2858 }
2859
2860 /* The following check is added before recording line 0 at
2861 end of function so as to handle hand-generated stabs
2862 which may have an N_FUN stabs at the end of the function, but
2863 no N_SLINE stabs. */
2864 if (sline_found_in_function)
2865 record_line (current_subfile, 0, last_function_start + valu);
2866
2867 within_function = 0;
2868 new = pop_context ();
2869
2870 /* Make a block for the local symbols within. */
2871 finish_block (new->name, &local_symbols, new->old_blocks,
2872 new->start_addr, new->start_addr + valu,
2873 objfile);
2874
2875 /* May be switching to an assembler file which may not be using
2876 block relative stabs, so reset the offset. */
2877 if (block_address_function_relative)
2878 function_start_offset = 0;
2879
2880 break;
2881 }
2882
2883 sline_found_in_function = 0;
2884
2885 /* Relocate for dynamic loading */
2886 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2887 valu = SMASH_TEXT_ADDRESS (valu);
2888 last_function_start = valu;
2889
2890 goto define_a_symbol;
2891
2892 case N_LBRAC:
2893 /* This "symbol" just indicates the start of an inner lexical
2894 context within a function. */
2895
2896 /* Ignore extra outermost context from SunPRO cc and acc. */
2897 if (n_opt_found && desc == 1)
2898 break;
2899
2900 if (block_address_function_relative)
2901 /* Relocate for Sun ELF acc fn-relative syms. */
2902 valu += function_start_offset;
2903 else
2904 /* On most machines, the block addresses are relative to the
2905 N_SO, the linker did not relocate them (sigh). */
2906 valu += last_source_start_addr;
2907
2908 #ifdef SUN_FIXED_LBRAC_BUG
2909 if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
2910 {
2911 /* Patch current LBRAC pc value to match last handy pc value */
2912 complaint (&symfile_complaints, "bad block start address patched");
2913 valu = last_pc_address;
2914 }
2915 #endif
2916 new = push_context (desc, valu);
2917 break;
2918
2919 case N_RBRAC:
2920 /* This "symbol" just indicates the end of an inner lexical
2921 context that was started with N_LBRAC. */
2922
2923 /* Ignore extra outermost context from SunPRO cc and acc. */
2924 if (n_opt_found && desc == 1)
2925 break;
2926
2927 if (block_address_function_relative)
2928 /* Relocate for Sun ELF acc fn-relative syms. */
2929 valu += function_start_offset;
2930 else
2931 /* On most machines, the block addresses are relative to the
2932 N_SO, the linker did not relocate them (sigh). */
2933 valu += last_source_start_addr;
2934
2935 if (context_stack_depth <= 0)
2936 {
2937 lbrac_mismatch_complaint (symnum);
2938 break;
2939 }
2940
2941 new = pop_context ();
2942 if (desc != new->depth)
2943 lbrac_mismatch_complaint (symnum);
2944
2945 /* Some compilers put the variable decls inside of an
2946 LBRAC/RBRAC block. This macro should be nonzero if this
2947 is true. DESC is N_DESC from the N_RBRAC symbol.
2948 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2949 or the GCC2_COMPILED_SYMBOL. */
2950 #if !defined (VARIABLES_INSIDE_BLOCK)
2951 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2952 #endif
2953
2954 /* Can only use new->locals as local symbols here if we're in
2955 gcc or on a machine that puts them before the lbrack. */
2956 if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2957 {
2958 if (local_symbols != NULL)
2959 {
2960 /* GCC development snapshots from March to December of
2961 2000 would output N_LSYM entries after N_LBRAC
2962 entries. As a consequence, these symbols are simply
2963 discarded. Complain if this is the case. Note that
2964 there are some compilers which legitimately put local
2965 symbols within an LBRAC/RBRAC block; this complaint
2966 might also help sort out problems in which
2967 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2968 complaint (&symfile_complaints,
2969 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2970 }
2971 local_symbols = new->locals;
2972 }
2973
2974 if (context_stack_depth
2975 > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2976 {
2977 /* This is not the outermost LBRAC...RBRAC pair in the function,
2978 its local symbols preceded it, and are the ones just recovered
2979 from the context stack. Define the block for them (but don't
2980 bother if the block contains no symbols. Should we complain
2981 on blocks without symbols? I can't think of any useful purpose
2982 for them). */
2983 if (local_symbols != NULL)
2984 {
2985 /* Muzzle a compiler bug that makes end < start. (which
2986 compilers? Is this ever harmful?). */
2987 if (new->start_addr > valu)
2988 {
2989 complaint (&symfile_complaints,
2990 "block start larger than block end");
2991 new->start_addr = valu;
2992 }
2993 /* Make a block for the local symbols within. */
2994 finish_block (0, &local_symbols, new->old_blocks,
2995 new->start_addr, valu, objfile);
2996 }
2997 }
2998 else
2999 {
3000 /* This is the outermost LBRAC...RBRAC pair. There is no
3001 need to do anything; leave the symbols that preceded it
3002 to be attached to the function's own block. We need to
3003 indicate that we just moved outside of the function. */
3004 within_function = 0;
3005 }
3006
3007 if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
3008 /* Now pop locals of block just finished. */
3009 local_symbols = new->locals;
3010 break;
3011
3012 case N_FN:
3013 case N_FN_SEQ:
3014 /* This kind of symbol indicates the start of an object file. */
3015 /* Relocate for dynamic loading */
3016 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3017 break;
3018
3019 case N_SO:
3020 /* This type of symbol indicates the start of data
3021 for one source file.
3022 Finish the symbol table of the previous source file
3023 (if any) and start accumulating a new symbol table. */
3024 /* Relocate for dynamic loading */
3025 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3026
3027 n_opt_found = 0;
3028
3029 #ifdef SUN_FIXED_LBRAC_BUG
3030 last_pc_address = valu; /* Save for SunOS bug circumcision */
3031 #endif
3032
3033 #ifdef PCC_SOL_BROKEN
3034 /* pcc bug, occasionally puts out SO for SOL. */
3035 if (context_stack_depth > 0)
3036 {
3037 start_subfile (name, NULL);
3038 break;
3039 }
3040 #endif
3041 if (last_source_file)
3042 {
3043 /* Check if previous symbol was also an N_SO (with some
3044 sanity checks). If so, that one was actually the directory
3045 name, and the current one is the real file name.
3046 Patch things up. */
3047 if (previous_stab_code == (unsigned char) N_SO)
3048 {
3049 patch_subfile_names (current_subfile, name);
3050 break; /* Ignore repeated SOs */
3051 }
3052 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
3053 end_stabs ();
3054 }
3055
3056 /* Null name means this just marks the end of text for this .o file.
3057 Don't start a new symtab in this case. */
3058 if (*name == '\000')
3059 break;
3060
3061 if (block_address_function_relative)
3062 function_start_offset = 0;
3063
3064 start_stabs ();
3065 start_symtab (name, NULL, valu);
3066 record_debugformat ("stabs");
3067 break;
3068
3069 case N_SOL:
3070 /* This type of symbol indicates the start of data for
3071 a sub-source-file, one whose contents were copied or
3072 included in the compilation of the main source file
3073 (whose name was given in the N_SO symbol.) */
3074 /* Relocate for dynamic loading */
3075 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3076 start_subfile (name, current_subfile->dirname);
3077 break;
3078
3079 case N_BINCL:
3080 push_subfile ();
3081 add_new_header_file (name, valu);
3082 start_subfile (name, current_subfile->dirname);
3083 break;
3084
3085 case N_EINCL:
3086 start_subfile (pop_subfile (), current_subfile->dirname);
3087 break;
3088
3089 case N_EXCL:
3090 add_old_header_file (name, valu);
3091 break;
3092
3093 case N_SLINE:
3094 /* This type of "symbol" really just records
3095 one line-number -- core-address correspondence.
3096 Enter it in the line list for this symbol table. */
3097
3098 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
3099 valu += function_start_offset;
3100
3101 #ifdef SUN_FIXED_LBRAC_BUG
3102 last_pc_address = valu; /* Save for SunOS bug circumcision */
3103 #endif
3104 /* If this is the first SLINE note in the function, record it at
3105 the start of the function instead of at the listed location. */
3106 if (within_function && sline_found_in_function == 0)
3107 {
3108 record_line (current_subfile, desc, last_function_start);
3109 sline_found_in_function = 1;
3110 }
3111 else
3112 record_line (current_subfile, desc, valu);
3113 break;
3114
3115 case N_BCOMM:
3116 common_block_start (name, objfile);
3117 break;
3118
3119 case N_ECOMM:
3120 common_block_end (objfile);
3121 break;
3122
3123 /* The following symbol types need to have the appropriate offset added
3124 to their value; then we process symbol definitions in the name. */
3125
3126 case N_STSYM: /* Static symbol in data seg */
3127 case N_LCSYM: /* Static symbol in BSS seg */
3128 case N_ROSYM: /* Static symbol in Read-only data seg */
3129 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3130 Solaris2's stabs-in-elf makes *most* symbols relative
3131 but leaves a few absolute (at least for Solaris 2.1 and version
3132 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3133 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3134 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3135 This leaves us no choice but to search for the 'S' or 'V'...
3136 (or pass the whole section_offsets stuff down ONE MORE function
3137 call level, which we really don't want to do). */
3138 {
3139 char *p;
3140
3141 /* .o files and NLMs have non-zero text seg offsets, but don't need
3142 their static syms offset in this fashion. XXX - This is really a
3143 crock that should be fixed in the solib handling code so that I
3144 don't have to work around it here. */
3145
3146 if (!symfile_relocatable)
3147 {
3148 p = strchr (name, ':');
3149 if (p != 0 && p[1] == 'S')
3150 {
3151 /* The linker relocated it. We don't want to add an
3152 elfstab_offset_sections-type offset, but we *do* want
3153 to add whatever solib.c passed to symbol_file_add as
3154 addr (this is known to affect SunOS4, and I suspect ELF
3155 too). Since elfstab_offset_sections currently does not
3156 muck with the text offset (there is no Ttext.text
3157 symbol), we can get addr from the text offset. If
3158 elfstab_offset_sections ever starts dealing with the
3159 text offset, and we still need to do this, we need to
3160 invent a SECT_OFF_ADDR_KLUDGE or something. */
3161 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3162 goto define_a_symbol;
3163 }
3164 }
3165 /* Since it's not the kludge case, re-dispatch to the right handler. */
3166 switch (type)
3167 {
3168 case N_STSYM:
3169 goto case_N_STSYM;
3170 case N_LCSYM:
3171 goto case_N_LCSYM;
3172 case N_ROSYM:
3173 goto case_N_ROSYM;
3174 default:
3175 internal_error (__FILE__, __LINE__, "failed internal consistency check");
3176 }
3177 }
3178
3179 case_N_STSYM: /* Static symbol in data seg */
3180 case N_DSLINE: /* Source line number, data seg */
3181 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3182 goto define_a_symbol;
3183
3184 case_N_LCSYM: /* Static symbol in BSS seg */
3185 case N_BSLINE: /* Source line number, bss seg */
3186 /* N_BROWS: overlaps with N_BSLINE */
3187 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3188 goto define_a_symbol;
3189
3190 case_N_ROSYM: /* Static symbol in Read-only data seg */
3191 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3192 goto define_a_symbol;
3193
3194 case N_ENTRY: /* Alternate entry point */
3195 /* Relocate for dynamic loading */
3196 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3197 goto define_a_symbol;
3198
3199 /* The following symbol types we don't know how to process. Handle
3200 them in a "default" way, but complain to people who care. */
3201 default:
3202 case N_CATCH: /* Exception handler catcher */
3203 case N_EHDECL: /* Exception handler name */
3204 case N_PC: /* Global symbol in Pascal */
3205 case N_M2C: /* Modula-2 compilation unit */
3206 /* N_MOD2: overlaps with N_EHDECL */
3207 case N_SCOPE: /* Modula-2 scope information */
3208 case N_ECOML: /* End common (local name) */
3209 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3210 case N_NBDATA:
3211 case N_NBBSS:
3212 case N_NBSTS:
3213 case N_NBLCS:
3214 unknown_symtype_complaint (local_hex_string (type));
3215 /* FALLTHROUGH */
3216
3217 /* The following symbol types don't need the address field relocated,
3218 since it is either unused, or is absolute. */
3219 define_a_symbol:
3220 case N_GSYM: /* Global variable */
3221 case N_NSYMS: /* Number of symbols (ultrix) */
3222 case N_NOMAP: /* No map? (ultrix) */
3223 case N_RSYM: /* Register variable */
3224 case N_DEFD: /* Modula-2 GNU module dependency */
3225 case N_SSYM: /* Struct or union element */
3226 case N_LSYM: /* Local symbol in stack */
3227 case N_PSYM: /* Parameter variable */
3228 case N_LENG: /* Length of preceding symbol type */
3229 if (name)
3230 {
3231 int deftype;
3232 char *colon_pos = strchr (name, ':');
3233 if (colon_pos == NULL)
3234 deftype = '\0';
3235 else
3236 deftype = colon_pos[1];
3237
3238 switch (deftype)
3239 {
3240 case 'f':
3241 case 'F':
3242 function_stab_type = type;
3243
3244 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3245 /* Deal with the SunPRO 3.0 compiler which omits the address
3246 from N_FUN symbols. */
3247 if (type == N_FUN
3248 && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
3249 {
3250 CORE_ADDR minsym_valu =
3251 find_stab_function_addr (name, last_source_file, objfile);
3252
3253 /* find_stab_function_addr will return 0 if the minimal
3254 symbol wasn't found. (Unfortunately, this might also
3255 be a valid address.) Anyway, if it *does* return 0,
3256 it is likely that the value was set correctly to begin
3257 with... */
3258 if (minsym_valu != 0)
3259 valu = minsym_valu;
3260 }
3261 #endif
3262
3263 #ifdef SUN_FIXED_LBRAC_BUG
3264 /* The Sun acc compiler, under SunOS4, puts out
3265 functions with N_GSYM or N_STSYM. The problem is
3266 that the address of the symbol is no good (for N_GSYM
3267 it doesn't even attept an address; for N_STSYM it
3268 puts out an address but then it gets relocated
3269 relative to the data segment, not the text segment).
3270 Currently we can't fix this up later as we do for
3271 some types of symbol in scan_file_globals.
3272 Fortunately we do have a way of finding the address -
3273 we know that the value in last_pc_address is either
3274 the one we want (if we're dealing with the first
3275 function in an object file), or somewhere in the
3276 previous function. This means that we can use the
3277 minimal symbol table to get the address. */
3278
3279 /* Starting with release 3.0, the Sun acc compiler,
3280 under SunOS4, puts out functions with N_FUN and a value
3281 of zero. This gets relocated to the start of the text
3282 segment of the module, which is no good either.
3283 Under SunOS4 we can deal with this as N_SLINE and N_SO
3284 entries contain valid absolute addresses.
3285 Release 3.0 acc also puts out N_OPT entries, which makes
3286 it possible to discern acc from cc or gcc. */
3287
3288 if (type == N_GSYM || type == N_STSYM
3289 || (type == N_FUN
3290 && n_opt_found && !block_address_function_relative))
3291 {
3292 struct minimal_symbol *m;
3293 int l = colon_pos - name;
3294
3295 m = lookup_minimal_symbol_by_pc (last_pc_address);
3296 if (m && STREQN (DEPRECATED_SYMBOL_NAME (m), name, l)
3297 && DEPRECATED_SYMBOL_NAME (m)[l] == '\0')
3298 /* last_pc_address was in this function */
3299 valu = SYMBOL_VALUE (m);
3300 else if (m && DEPRECATED_SYMBOL_NAME (m + 1)
3301 && STREQN (DEPRECATED_SYMBOL_NAME (m + 1), name, l)
3302 && DEPRECATED_SYMBOL_NAME (m + 1)[l] == '\0')
3303 /* last_pc_address was in last function */
3304 valu = SYMBOL_VALUE (m + 1);
3305 else
3306 /* Not found - use last_pc_address (for finish_block) */
3307 valu = last_pc_address;
3308 }
3309
3310 last_pc_address = valu; /* Save for SunOS bug circumcision */
3311 #endif
3312
3313 if (block_address_function_relative)
3314 /* For Solaris 2.0 compilers, the block addresses and
3315 N_SLINE's are relative to the start of the
3316 function. On normal systems, and when using gcc on
3317 Solaris 2.0, these addresses are just absolute, or
3318 relative to the N_SO, depending on
3319 BLOCK_ADDRESS_ABSOLUTE. */
3320 function_start_offset = valu;
3321
3322 within_function = 1;
3323
3324 if (context_stack_depth > 1)
3325 {
3326 complaint (&symfile_complaints,
3327 "unmatched N_LBRAC before symtab pos %d", symnum);
3328 break;
3329 }
3330
3331 if (context_stack_depth > 0)
3332 {
3333 new = pop_context ();
3334 /* Make a block for the local symbols within. */
3335 finish_block (new->name, &local_symbols, new->old_blocks,
3336 new->start_addr, valu, objfile);
3337 }
3338
3339 new = push_context (0, valu);
3340 new->name = define_symbol (valu, name, desc, type, objfile);
3341 break;
3342
3343 default:
3344 define_symbol (valu, name, desc, type, objfile);
3345 break;
3346 }
3347 }
3348 break;
3349
3350 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3351 for a bunch of other flags, too. Someday we may parse their
3352 flags; for now we ignore theirs and hope they'll ignore ours. */
3353 case N_OPT: /* Solaris 2: Compiler options */
3354 if (name)
3355 {
3356 if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
3357 {
3358 processing_gcc_compilation = 2;
3359 #if 0 /* Works, but is experimental. -fnf */
3360 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3361 know whether it will use the old style or v3 mangling. */
3362 if (AUTO_DEMANGLING)
3363 {
3364 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3365 }
3366 #endif
3367 }
3368 else
3369 n_opt_found = 1;
3370 }
3371 break;
3372
3373 case N_MAIN: /* Name of main routine. */
3374 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3375 it with a symbol file with "main" and without N_MAIN. I'm
3376 not sure exactly what rule to follow but probably something
3377 like: N_MAIN takes precedence over "main" no matter what
3378 objfile it is in; If there is more than one N_MAIN, choose
3379 the one in the symfile_objfile; If there is more than one
3380 N_MAIN within a given objfile, complain() and choose
3381 arbitrarily. (kingdon) */
3382 if (name != NULL)
3383 set_main_name (name);
3384 break;
3385
3386 /* The following symbol types can be ignored. */
3387 case N_OBJ: /* Solaris 2: Object file dir and name */
3388 /* N_UNDF: Solaris 2: file separator mark */
3389 /* N_UNDF: -- we will never encounter it, since we only process one
3390 file's symbols at once. */
3391 case N_ENDM: /* Solaris 2: End of module */
3392 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3393 break;
3394 }
3395
3396 /* '#' is a GNU C extension to allow one symbol to refer to another
3397 related symbol.
3398
3399 Generally this is used so that an alias can refer to its main
3400 symbol. */
3401 if (name[0] == '#')
3402 {
3403 /* Initialize symbol reference names and determine if this is
3404 a definition. If symbol reference is being defined, go
3405 ahead and add it. Otherwise, just return sym. */
3406
3407 char *s = name;
3408 int refnum;
3409
3410 /* If this stab defines a new reference ID that is not on the
3411 reference list, then put it on the reference list.
3412
3413 We go ahead and advance NAME past the reference, even though
3414 it is not strictly necessary at this time. */
3415 refnum = symbol_reference_defined (&s);
3416 if (refnum >= 0)
3417 if (!ref_search (refnum))
3418 ref_add (refnum, 0, name, valu);
3419 name = s;
3420 }
3421
3422
3423 previous_stab_code = type;
3424 }
3425 \f
3426 /* FIXME: The only difference between this and elfstab_build_psymtabs
3427 is the call to install_minimal_symbols for elf, and the support for
3428 split sections. If the differences are really that small, the code
3429 should be shared. */
3430
3431 /* Scan and build partial symbols for an coff symbol file.
3432 The coff file has already been processed to get its minimal symbols.
3433
3434 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3435 rolled into one.
3436
3437 OBJFILE is the object file we are reading symbols from.
3438 ADDR is the address relative to which the symbols are (e.g.
3439 the base address of the text segment).
3440 MAINLINE is true if we are reading the main symbol
3441 table (as opposed to a shared lib or dynamically loaded file).
3442 TEXTADDR is the address of the text section.
3443 TEXTSIZE is the size of the text section.
3444 STABSECTS is the list of .stab sections in OBJFILE.
3445 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3446 .stabstr section exists.
3447
3448 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3449 adjusted for coff details. */
3450
3451 void
3452 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
3453 CORE_ADDR textaddr, unsigned int textsize,
3454 struct stab_section_list *stabsects,
3455 file_ptr stabstroffset, unsigned int stabstrsize)
3456 {
3457 int val;
3458 bfd *sym_bfd = objfile->obfd;
3459 char *name = bfd_get_filename (sym_bfd);
3460 struct dbx_symfile_info *info;
3461 unsigned int stabsize;
3462
3463 /* There is already a dbx_symfile_info allocated by our caller.
3464 It might even contain some info from the coff symtab to help us. */
3465 info = objfile->sym_stab_info;
3466
3467 DBX_TEXT_ADDR (objfile) = textaddr;
3468 DBX_TEXT_SIZE (objfile) = textsize;
3469
3470 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3471 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3472 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3473
3474 if (stabstrsize > bfd_get_size (sym_bfd))
3475 error ("ridiculous string table size: %d bytes", stabstrsize);
3476 DBX_STRINGTAB (objfile) = (char *)
3477 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
3478 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3479
3480 /* Now read in the string table in one big gulp. */
3481
3482 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3483 if (val < 0)
3484 perror_with_name (name);
3485 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3486 if (val != stabstrsize)
3487 perror_with_name (name);
3488
3489 stabsread_new_init ();
3490 buildsym_new_init ();
3491 free_header_files ();
3492 init_header_files ();
3493
3494 processing_acc_compilation = 1;
3495
3496 /* In a coff file, we've already installed the minimal symbols that came
3497 from the coff (non-stab) symbol table, so always act like an
3498 incremental load here. */
3499 if (stabsects->next == NULL)
3500 {
3501 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3502 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3503 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3504 }
3505 else
3506 {
3507 struct stab_section_list *stabsect;
3508
3509 DBX_SYMCOUNT (objfile) = 0;
3510 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3511 {
3512 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3513 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3514 }
3515
3516 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3517
3518 symbuf_sections = stabsects->next;
3519 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3520 symbuf_read = 0;
3521 }
3522
3523 dbx_symfile_read (objfile, 0);
3524 }
3525 \f
3526 /* Scan and build partial symbols for an ELF symbol file.
3527 This ELF file has already been processed to get its minimal symbols,
3528 and any DWARF symbols that were in it.
3529
3530 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3531 rolled into one.
3532
3533 OBJFILE is the object file we are reading symbols from.
3534 ADDR is the address relative to which the symbols are (e.g.
3535 the base address of the text segment).
3536 MAINLINE is true if we are reading the main symbol
3537 table (as opposed to a shared lib or dynamically loaded file).
3538 STABSECT is the BFD section information for the .stab section.
3539 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3540 .stabstr section exists.
3541
3542 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3543 adjusted for elf details. */
3544
3545 void
3546 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
3547 asection *stabsect,
3548 file_ptr stabstroffset, unsigned int stabstrsize)
3549 {
3550 int val;
3551 bfd *sym_bfd = objfile->obfd;
3552 char *name = bfd_get_filename (sym_bfd);
3553 struct dbx_symfile_info *info;
3554 struct cleanup *back_to = NULL;
3555
3556 /* There is already a dbx_symfile_info allocated by our caller.
3557 It might even contain some info from the ELF symtab to help us. */
3558 info = objfile->sym_stab_info;
3559
3560 /* Find the first and last text address. dbx_symfile_read seems to
3561 want this. */
3562 find_text_range (sym_bfd, objfile);
3563
3564 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3565 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3566 DBX_SYMCOUNT (objfile)
3567 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3568 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3569 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3570 DBX_STAB_SECTION (objfile) = stabsect;
3571
3572 if (stabstrsize > bfd_get_size (sym_bfd))
3573 error ("ridiculous string table size: %d bytes", stabstrsize);
3574 DBX_STRINGTAB (objfile) = (char *)
3575 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
3576 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3577
3578 /* Now read in the string table in one big gulp. */
3579
3580 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3581 if (val < 0)
3582 perror_with_name (name);
3583 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3584 if (val != stabstrsize)
3585 perror_with_name (name);
3586
3587 stabsread_new_init ();
3588 buildsym_new_init ();
3589 free_header_files ();
3590 init_header_files ();
3591
3592 processing_acc_compilation = 1;
3593
3594 symbuf_read = 0;
3595 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3596 stabs_data = symfile_relocate_debug_section (objfile->obfd, stabsect, NULL);
3597 if (stabs_data)
3598 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
3599
3600 /* In an elf file, we've already installed the minimal symbols that came
3601 from the elf (non-stab) symbol table, so always act like an
3602 incremental load here. dbx_symfile_read should not generate any new
3603 minimal symbols, since we will have already read the ELF dynamic symbol
3604 table and normal symbol entries won't be in the ".stab" section; but in
3605 case it does, it will install them itself. */
3606 dbx_symfile_read (objfile, 0);
3607
3608 if (back_to)
3609 do_cleanups (back_to);
3610 }
3611 \f
3612 /* Scan and build partial symbols for a file with special sections for stabs
3613 and stabstrings. The file has already been processed to get its minimal
3614 symbols, and any other symbols that might be necessary to resolve GSYMs.
3615
3616 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3617 rolled into one.
3618
3619 OBJFILE is the object file we are reading symbols from.
3620 ADDR is the address relative to which the symbols are (e.g. the base address
3621 of the text segment).
3622 MAINLINE is true if we are reading the main symbol table (as opposed to a
3623 shared lib or dynamically loaded file).
3624 STAB_NAME is the name of the section that contains the stabs.
3625 STABSTR_NAME is the name of the section that contains the stab strings.
3626
3627 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3628
3629 void
3630 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
3631 char *stabstr_name, char *text_name)
3632 {
3633 int val;
3634 bfd *sym_bfd = objfile->obfd;
3635 char *name = bfd_get_filename (sym_bfd);
3636 asection *stabsect;
3637 asection *stabstrsect;
3638 asection *text_sect;
3639
3640 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3641 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3642
3643 if (!stabsect)
3644 return;
3645
3646 if (!stabstrsect)
3647 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3648 stab_name, stabstr_name);
3649
3650 objfile->sym_stab_info = (struct dbx_symfile_info *)
3651 xmalloc (sizeof (struct dbx_symfile_info));
3652 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
3653
3654 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3655 if (!text_sect)
3656 error ("Can't find %s section in symbol file", text_name);
3657 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3658 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3659
3660 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3661 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3662 / DBX_SYMBOL_SIZE (objfile);
3663 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3664 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3665
3666 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3667 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
3668 DBX_STRINGTAB (objfile) = (char *)
3669 obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
3670 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3671
3672 /* Now read in the string table in one big gulp. */
3673
3674 val = bfd_get_section_contents (sym_bfd, /* bfd */
3675 stabstrsect, /* bfd section */
3676 DBX_STRINGTAB (objfile), /* input buffer */
3677 0, /* offset into section */
3678 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
3679
3680 if (!val)
3681 perror_with_name (name);
3682
3683 stabsread_new_init ();
3684 buildsym_new_init ();
3685 free_header_files ();
3686 init_header_files ();
3687
3688 /* Now, do an incremental load */
3689
3690 processing_acc_compilation = 1;
3691 dbx_symfile_read (objfile, 0);
3692 }
3693 \f
3694 static struct sym_fns aout_sym_fns =
3695 {
3696 bfd_target_aout_flavour,
3697 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
3698 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3699 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
3700 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
3701 default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
3702 NULL /* next: pointer to next struct sym_fns */
3703 };
3704
3705 void
3706 _initialize_dbxread (void)
3707 {
3708 add_symtab_fns (&aout_sym_fns);
3709 }
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