* dbxread.c (read_dbx_symtab): Avoid compiler warnings for
[deliverable/binutils-gdb.git] / gdb / dbxread.c
1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2008.
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 3 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, see <http://www.gnu.org/licenses/>. */
20
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
25 from a file.
26
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
34
35 #include "defs.h"
36 #include "gdb_string.h"
37
38 #if defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
40 #include <fcntl.h>
41 #endif
42
43 #include "gdb_obstack.h"
44 #include "gdb_stat.h"
45 #include "symtab.h"
46 #include "breakpoint.h"
47 #include "target.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
50 #include "objfiles.h"
51 #include "buildsym.h"
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
54 #include "demangle.h"
55 #include "complaints.h"
56 #include "cp-abi.h"
57 #include "cp-support.h"
58
59 #include "gdb_assert.h"
60 #include "gdb_string.h"
61
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
64 \f
65
66 /* We put a pointer to this structure in the read_symtab_private field
67 of the psymtab. */
68
69 struct symloc
70 {
71 /* Offset within the file symbol table of first local symbol for this
72 file. */
73
74 int ldsymoff;
75
76 /* Length (in bytes) of the section of the symbol table devoted to
77 this file's symbols (actually, the section bracketed may contain
78 more than just this file's symbols). If ldsymlen is 0, the only
79 reason for this thing's existence is the dependency list. Nothing
80 else will happen when it is read in. */
81
82 int ldsymlen;
83
84 /* The size of each symbol in the symbol file (in external form). */
85
86 int symbol_size;
87
88 /* Further information needed to locate the symbols if they are in
89 an ELF file. */
90
91 int symbol_offset;
92 int string_offset;
93 int file_string_offset;
94 };
95
96 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
97 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
98 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
99 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
100 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
101 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
102 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
103 \f
104
105 /* Remember what we deduced to be the source language of this psymtab. */
106
107 static enum language psymtab_language = language_unknown;
108
109 /* The BFD for this file -- implicit parameter to next_symbol_text. */
110
111 static bfd *symfile_bfd;
112
113 /* The size of each symbol in the symbol file (in external form).
114 This is set by dbx_symfile_read when building psymtabs, and by
115 dbx_psymtab_to_symtab when building symtabs. */
116
117 static unsigned symbol_size;
118
119 /* This is the offset of the symbol table in the executable file. */
120
121 static unsigned symbol_table_offset;
122
123 /* This is the offset of the string table in the executable file. */
124
125 static unsigned string_table_offset;
126
127 /* For elf+stab executables, the n_strx field is not a simple index
128 into the string table. Instead, each .o file has a base offset in
129 the string table, and the associated symbols contain offsets from
130 this base. The following two variables contain the base offset for
131 the current and next .o files. */
132
133 static unsigned int file_string_table_offset;
134 static unsigned int next_file_string_table_offset;
135
136 /* .o and NLM files contain unrelocated addresses which are based at
137 0. When non-zero, this flag disables some of the special cases for
138 Solaris elf+stab text addresses at location 0. */
139
140 static int symfile_relocatable = 0;
141
142 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
143 relative to the function start address. */
144
145 static int block_address_function_relative = 0;
146 \f
147 /* The lowest text address we have yet encountered. This is needed
148 because in an a.out file, there is no header field which tells us
149 what address the program is actually going to be loaded at, so we
150 need to make guesses based on the symbols (which *are* relocated to
151 reflect the address it will be loaded at). */
152
153 static CORE_ADDR lowest_text_address;
154
155 /* Non-zero if there is any line number info in the objfile. Prevents
156 end_psymtab from discarding an otherwise empty psymtab. */
157
158 static int has_line_numbers;
159
160 /* Complaints about the symbols we have encountered. */
161
162 static void
163 unknown_symtype_complaint (const char *arg1)
164 {
165 complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
166 }
167
168 static void
169 lbrac_mismatch_complaint (int arg1)
170 {
171 complaint (&symfile_complaints,
172 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
173 }
174
175 static void
176 repeated_header_complaint (const char *arg1, int arg2)
177 {
178 complaint (&symfile_complaints,
179 _("\"repeated\" header file %s not previously seen, at symtab \
180 pos %d"),
181 arg1, arg2);
182 }
183
184 /* find_text_range --- find start and end of loadable code sections
185
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
189
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
192
193 static void
194 find_text_range (bfd * sym_bfd, struct objfile *objfile)
195 {
196 asection *sec;
197 int found_any = 0;
198 CORE_ADDR start = 0;
199 CORE_ADDR end = 0;
200
201 for (sec = sym_bfd->sections; sec; sec = sec->next)
202 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
203 {
204 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
205 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
206
207 if (found_any)
208 {
209 if (sec_start < start)
210 start = sec_start;
211 if (sec_end > end)
212 end = sec_end;
213 }
214 else
215 {
216 start = sec_start;
217 end = sec_end;
218 }
219
220 found_any = 1;
221 }
222
223 if (!found_any)
224 error (_("Can't find any code sections in symbol file"));
225
226 DBX_TEXT_ADDR (objfile) = start;
227 DBX_TEXT_SIZE (objfile) = end - start;
228 }
229 \f
230
231
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
236
237 struct header_file_location
238 {
239 char *name; /* Name of header file */
240 int instance; /* See above */
241 struct partial_symtab *pst; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
243 };
244
245 /* The actual list and controling variables */
246 static struct header_file_location *bincl_list, *next_bincl;
247 static int bincls_allocated;
248
249 /* Local function prototypes */
250
251 extern void _initialize_dbxread (void);
252
253 static void read_ofile_symtab (struct partial_symtab *);
254
255 static void dbx_psymtab_to_symtab (struct partial_symtab *);
256
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
258
259 static void read_dbx_dynamic_symtab (struct objfile *objfile);
260
261 static void read_dbx_symtab (struct objfile *);
262
263 static void free_bincl_list (struct objfile *);
264
265 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
266
267 static void add_bincl_to_list (struct partial_symtab *, char *, int);
268
269 static void init_bincl_list (int, struct objfile *);
270
271 static char *dbx_next_symbol_text (struct objfile *);
272
273 static void fill_symbuf (bfd *);
274
275 static void dbx_symfile_init (struct objfile *);
276
277 static void dbx_new_init (struct objfile *);
278
279 static void dbx_symfile_read (struct objfile *, int);
280
281 static void dbx_symfile_finish (struct objfile *);
282
283 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
284
285 static void add_new_header_file (char *, int);
286
287 static void add_old_header_file (char *, int);
288
289 static void add_this_object_header_file (int);
290
291 static struct partial_symtab *start_psymtab (struct objfile *, char *,
292 CORE_ADDR, int,
293 struct partial_symbol **,
294 struct partial_symbol **);
295
296 /* Free up old header file tables */
297
298 void
299 free_header_files (void)
300 {
301 if (this_object_header_files)
302 {
303 xfree (this_object_header_files);
304 this_object_header_files = NULL;
305 }
306 n_allocated_this_object_header_files = 0;
307 }
308
309 /* Allocate new header file tables */
310
311 void
312 init_header_files (void)
313 {
314 n_allocated_this_object_header_files = 10;
315 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
316 }
317
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
320
321 static void
322 add_this_object_header_file (int i)
323 {
324 if (n_this_object_header_files == n_allocated_this_object_header_files)
325 {
326 n_allocated_this_object_header_files *= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files,
329 n_allocated_this_object_header_files * sizeof (int));
330 }
331
332 this_object_header_files[n_this_object_header_files++] = i;
333 }
334
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
339
340 static void
341 add_old_header_file (char *name, int instance)
342 {
343 struct header_file *p = HEADER_FILES (current_objfile);
344 int i;
345
346 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
347 if (strcmp (p[i].name, name) == 0 && instance == p[i].instance)
348 {
349 add_this_object_header_file (i);
350 return;
351 }
352 repeated_header_complaint (name, symnum);
353 }
354
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
361
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
365
366 static void
367 add_new_header_file (char *name, int instance)
368 {
369 int i;
370 struct header_file *hfile;
371
372 /* Make sure there is room for one more header file. */
373
374 i = N_ALLOCATED_HEADER_FILES (current_objfile);
375
376 if (N_HEADER_FILES (current_objfile) == i)
377 {
378 if (i == 0)
379 {
380 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
381 HEADER_FILES (current_objfile) = (struct header_file *)
382 xmalloc (10 * sizeof (struct header_file));
383 }
384 else
385 {
386 i *= 2;
387 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
388 HEADER_FILES (current_objfile) = (struct header_file *)
389 xrealloc ((char *) HEADER_FILES (current_objfile),
390 (i * sizeof (struct header_file)));
391 }
392 }
393
394 /* Create an entry for this header file. */
395
396 i = N_HEADER_FILES (current_objfile)++;
397 hfile = HEADER_FILES (current_objfile) + i;
398 hfile->name = savestring (name, strlen (name));
399 hfile->instance = instance;
400 hfile->length = 10;
401 hfile->vector
402 = (struct type **) xmalloc (10 * sizeof (struct type *));
403 memset (hfile->vector, 0, 10 * sizeof (struct type *));
404
405 add_this_object_header_file (i);
406 }
407
408 #if 0
409 static struct type **
410 explicit_lookup_type (int real_filenum, int index)
411 {
412 struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
413
414 if (index >= f->length)
415 {
416 f->length *= 2;
417 f->vector = (struct type **)
418 xrealloc (f->vector, f->length * sizeof (struct type *));
419 memset (&f->vector[f->length / 2],
420 '\0', f->length * sizeof (struct type *) / 2);
421 }
422 return &f->vector[index];
423 }
424 #endif
425 \f
426 static void
427 record_minimal_symbol (char *name, CORE_ADDR address, int type,
428 struct objfile *objfile)
429 {
430 enum minimal_symbol_type ms_type;
431 int section;
432 asection *bfd_section;
433
434 switch (type)
435 {
436 case N_TEXT | N_EXT:
437 ms_type = mst_text;
438 section = SECT_OFF_TEXT (objfile);
439 bfd_section = DBX_TEXT_SECTION (objfile);
440 break;
441 case N_DATA | N_EXT:
442 ms_type = mst_data;
443 section = SECT_OFF_DATA (objfile);
444 bfd_section = DBX_DATA_SECTION (objfile);
445 break;
446 case N_BSS | N_EXT:
447 ms_type = mst_bss;
448 section = SECT_OFF_BSS (objfile);
449 bfd_section = DBX_BSS_SECTION (objfile);
450 break;
451 case N_ABS | N_EXT:
452 ms_type = mst_abs;
453 section = -1;
454 bfd_section = NULL;
455 break;
456 #ifdef N_SETV
457 case N_SETV | N_EXT:
458 ms_type = mst_data;
459 section = SECT_OFF_DATA (objfile);
460 bfd_section = DBX_DATA_SECTION (objfile);
461 break;
462 case N_SETV:
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
465 file local. */
466 ms_type = mst_file_data;
467 section = SECT_OFF_DATA (objfile);
468 bfd_section = DBX_DATA_SECTION (objfile);
469 break;
470 #endif
471 case N_TEXT:
472 case N_NBTEXT:
473 case N_FN:
474 case N_FN_SEQ:
475 ms_type = mst_file_text;
476 section = SECT_OFF_TEXT (objfile);
477 bfd_section = DBX_TEXT_SECTION (objfile);
478 break;
479 case N_DATA:
480 ms_type = mst_file_data;
481
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
487 ms_type = mst_data;
488
489 /* Same with virtual function tables, both global and static. */
490 {
491 char *tempstring = name;
492 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
493 ++tempstring;
494 if (is_vtable_name (tempstring))
495 ms_type = mst_data;
496 }
497 section = SECT_OFF_DATA (objfile);
498 bfd_section = DBX_DATA_SECTION (objfile);
499 break;
500 case N_BSS:
501 ms_type = mst_file_bss;
502 section = SECT_OFF_BSS (objfile);
503 bfd_section = DBX_BSS_SECTION (objfile);
504 break;
505 default:
506 ms_type = mst_unknown;
507 section = -1;
508 bfd_section = NULL;
509 break;
510 }
511
512 if ((ms_type == mst_file_text || ms_type == mst_text)
513 && address < lowest_text_address)
514 lowest_text_address = address;
515
516 prim_record_minimal_symbol_and_info
517 (name, address, ms_type, section, bfd_section, objfile);
518 }
519 \f
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
524
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
527
528 static void
529 dbx_symfile_read (struct objfile *objfile, int mainline)
530 {
531 bfd *sym_bfd;
532 int val;
533 struct cleanup *back_to;
534
535 sym_bfd = objfile->obfd;
536
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
540
541 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
542
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
546 file formats. */
547 block_address_function_relative =
548 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
554
555 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
556 if (val < 0)
557 perror_with_name (objfile->name);
558
559 /* If we are reinitializing, or if we have never loaded syms yet, init */
560 if (mainline
561 || (objfile->global_psymbols.size == 0
562 && objfile->static_psymbols.size == 0))
563 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
564
565 symbol_size = DBX_SYMBOL_SIZE (objfile);
566 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
567
568 free_pending_blocks ();
569 back_to = make_cleanup (really_free_pendings, 0);
570
571 init_minimal_symbol_collection ();
572 make_cleanup_discard_minimal_symbols ();
573
574 /* Read stabs data from executable file and define symbols. */
575
576 read_dbx_symtab (objfile);
577
578 /* Add the dynamic symbols. */
579
580 read_dbx_dynamic_symtab (objfile);
581
582 /* Install any minimal symbols that have been collected as the current
583 minimal symbols for this objfile. */
584
585 install_minimal_symbols (objfile);
586
587 do_cleanups (back_to);
588 }
589
590 /* Initialize anything that needs initializing when a completely new
591 symbol file is specified (not just adding some symbols from another
592 file, e.g. a shared library). */
593
594 static void
595 dbx_new_init (struct objfile *ignore)
596 {
597 stabsread_new_init ();
598 buildsym_new_init ();
599 init_header_files ();
600 }
601
602
603 /* dbx_symfile_init ()
604 is the dbx-specific initialization routine for reading symbols.
605 It is passed a struct objfile which contains, among other things,
606 the BFD for the file whose symbols are being read, and a slot for a pointer
607 to "private data" which we fill with goodies.
608
609 We read the string table into malloc'd space and stash a pointer to it.
610
611 Since BFD doesn't know how to read debug symbols in a format-independent
612 way (and may never do so...), we have to do it ourselves. We will never
613 be called unless this is an a.out (or very similar) file.
614 FIXME, there should be a cleaner peephole into the BFD environment here. */
615
616 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
617
618 static void
619 dbx_symfile_init (struct objfile *objfile)
620 {
621 int val;
622 bfd *sym_bfd = objfile->obfd;
623 char *name = bfd_get_filename (sym_bfd);
624 asection *text_sect;
625 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
626
627 /* Allocate struct to keep track of the symfile */
628 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
629 xmalloc (sizeof (struct dbx_symfile_info));
630 memset (objfile->deprecated_sym_stab_info, 0,
631 sizeof (struct dbx_symfile_info));
632
633 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
634 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
635 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
636
637 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
638 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
639 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
640
641 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
642
643 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
644
645 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
646 if (!text_sect)
647 error (_("Can't find .text section in symbol file"));
648 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
649 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
650
651 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
652 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
653 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
654
655 /* Read the string table and stash it away in the objfile_obstack.
656 When we blow away the objfile the string table goes away as well.
657 Note that gdb used to use the results of attempting to malloc the
658 string table, based on the size it read, as a form of sanity check
659 for botched byte swapping, on the theory that a byte swapped string
660 table size would be so totally bogus that the malloc would fail. Now
661 that we put in on the objfile_obstack, we can't do this since gdb gets
662 a fatal error (out of virtual memory) if the size is bogus. We can
663 however at least check to see if the size is less than the size of
664 the size field itself, or larger than the size of the entire file.
665 Note that all valid string tables have a size greater than zero, since
666 the bytes used to hold the size are included in the count. */
667
668 if (STRING_TABLE_OFFSET == 0)
669 {
670 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
671 will never be zero, even when there is no string table. This
672 would appear to be a bug in bfd. */
673 DBX_STRINGTAB_SIZE (objfile) = 0;
674 DBX_STRINGTAB (objfile) = NULL;
675 }
676 else
677 {
678 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
679 if (val < 0)
680 perror_with_name (name);
681
682 memset (size_temp, 0, sizeof (size_temp));
683 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
684 if (val < 0)
685 {
686 perror_with_name (name);
687 }
688 else if (val == 0)
689 {
690 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
691 EOF if there is no string table, and attempting to read the size
692 from EOF will read zero bytes. */
693 DBX_STRINGTAB_SIZE (objfile) = 0;
694 DBX_STRINGTAB (objfile) = NULL;
695 }
696 else
697 {
698 /* Read some data that would appear to be the string table size.
699 If there really is a string table, then it is probably the right
700 size. Byteswap if necessary and validate the size. Note that
701 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
702 random data that happened to be at STRING_TABLE_OFFSET, because
703 bfd can't tell us there is no string table, the sanity checks may
704 or may not catch this. */
705 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
706
707 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
708 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
709 error (_("ridiculous string table size (%d bytes)."),
710 DBX_STRINGTAB_SIZE (objfile));
711
712 DBX_STRINGTAB (objfile) =
713 (char *) obstack_alloc (&objfile->objfile_obstack,
714 DBX_STRINGTAB_SIZE (objfile));
715 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
716
717 /* Now read in the string table in one big gulp. */
718
719 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
720 if (val < 0)
721 perror_with_name (name);
722 val = bfd_bread (DBX_STRINGTAB (objfile),
723 DBX_STRINGTAB_SIZE (objfile),
724 sym_bfd);
725 if (val != DBX_STRINGTAB_SIZE (objfile))
726 perror_with_name (name);
727 }
728 }
729 }
730
731 /* Perform any local cleanups required when we are done with a particular
732 objfile. I.E, we are in the process of discarding all symbol information
733 for an objfile, freeing up all memory held for it, and unlinking the
734 objfile struct from the global list of known objfiles. */
735
736 static void
737 dbx_symfile_finish (struct objfile *objfile)
738 {
739 if (objfile->deprecated_sym_stab_info != NULL)
740 {
741 if (HEADER_FILES (objfile) != NULL)
742 {
743 int i = N_HEADER_FILES (objfile);
744 struct header_file *hfiles = HEADER_FILES (objfile);
745
746 while (--i >= 0)
747 {
748 xfree (hfiles[i].name);
749 xfree (hfiles[i].vector);
750 }
751 xfree (hfiles);
752 }
753 xfree (objfile->deprecated_sym_stab_info);
754 }
755 free_header_files ();
756 }
757 \f
758
759 /* Buffer for reading the symbol table entries. */
760 static struct external_nlist symbuf[4096];
761 static int symbuf_idx;
762 static int symbuf_end;
763
764 /* Name of last function encountered. Used in Solaris to approximate
765 object file boundaries. */
766 static char *last_function_name;
767
768 /* The address in memory of the string table of the object file we are
769 reading (which might not be the "main" object file, but might be a
770 shared library or some other dynamically loaded thing). This is
771 set by read_dbx_symtab when building psymtabs, and by
772 read_ofile_symtab when building symtabs, and is used only by
773 next_symbol_text. FIXME: If that is true, we don't need it when
774 building psymtabs, right? */
775 static char *stringtab_global;
776
777 /* These variables are used to control fill_symbuf when the stabs
778 symbols are not contiguous (as may be the case when a COFF file is
779 linked using --split-by-reloc). */
780 static struct stab_section_list *symbuf_sections;
781 static unsigned int symbuf_left;
782 static unsigned int symbuf_read;
783
784 /* This variable stores a global stabs buffer, if we read stabs into
785 memory in one chunk in order to process relocations. */
786 static bfd_byte *stabs_data;
787
788 /* Refill the symbol table input buffer
789 and set the variables that control fetching entries from it.
790 Reports an error if no data available.
791 This function can read past the end of the symbol table
792 (into the string table) but this does no harm. */
793
794 static void
795 fill_symbuf (bfd *sym_bfd)
796 {
797 unsigned int count;
798 int nbytes;
799
800 if (stabs_data)
801 {
802 nbytes = sizeof (symbuf);
803 if (nbytes > symbuf_left)
804 nbytes = symbuf_left;
805 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
806 }
807 else if (symbuf_sections == NULL)
808 {
809 count = sizeof (symbuf);
810 nbytes = bfd_bread (symbuf, count, sym_bfd);
811 }
812 else
813 {
814 if (symbuf_left <= 0)
815 {
816 file_ptr filepos = symbuf_sections->section->filepos;
817 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
818 perror_with_name (bfd_get_filename (sym_bfd));
819 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
820 symbol_table_offset = filepos - symbuf_read;
821 symbuf_sections = symbuf_sections->next;
822 }
823
824 count = symbuf_left;
825 if (count > sizeof (symbuf))
826 count = sizeof (symbuf);
827 nbytes = bfd_bread (symbuf, count, sym_bfd);
828 }
829
830 if (nbytes < 0)
831 perror_with_name (bfd_get_filename (sym_bfd));
832 else if (nbytes == 0)
833 error (_("Premature end of file reading symbol table"));
834 symbuf_end = nbytes / symbol_size;
835 symbuf_idx = 0;
836 symbuf_left -= nbytes;
837 symbuf_read += nbytes;
838 }
839
840 static void
841 stabs_seek (int sym_offset)
842 {
843 if (stabs_data)
844 {
845 symbuf_read += sym_offset;
846 symbuf_left -= sym_offset;
847 }
848 else
849 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
850 }
851
852 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
853 { \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
856 (intern).n_other = 0; \
857 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
858 if (bfd_get_sign_extend_vma (abfd)) \
859 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
860 else \
861 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
862 }
863
864 /* Invariant: The symbol pointed to by symbuf_idx is the first one
865 that hasn't been swapped. Swap the symbol at the same time
866 that symbuf_idx is incremented. */
867
868 /* dbx allows the text of a symbol name to be continued into the
869 next symbol name! When such a continuation is encountered
870 (a \ at the end of the text of a name)
871 call this function to get the continuation. */
872
873 static char *
874 dbx_next_symbol_text (struct objfile *objfile)
875 {
876 struct internal_nlist nlist;
877
878 if (symbuf_idx == symbuf_end)
879 fill_symbuf (symfile_bfd);
880
881 symnum++;
882 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
883 OBJSTAT (objfile, n_stabs++);
884
885 symbuf_idx++;
886
887 return nlist.n_strx + stringtab_global + file_string_table_offset;
888 }
889 \f
890 /* Initialize the list of bincls to contain none and have some
891 allocated. */
892
893 static void
894 init_bincl_list (int number, struct objfile *objfile)
895 {
896 bincls_allocated = number;
897 next_bincl = bincl_list = (struct header_file_location *)
898 xmalloc (bincls_allocated * sizeof (struct header_file_location));
899 }
900
901 /* Add a bincl to the list. */
902
903 static void
904 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
905 {
906 if (next_bincl >= bincl_list + bincls_allocated)
907 {
908 int offset = next_bincl - bincl_list;
909 bincls_allocated *= 2;
910 bincl_list = (struct header_file_location *)
911 xrealloc ((char *) bincl_list,
912 bincls_allocated * sizeof (struct header_file_location));
913 next_bincl = bincl_list + offset;
914 }
915 next_bincl->pst = pst;
916 next_bincl->instance = instance;
917 next_bincl++->name = name;
918 }
919
920 /* Given a name, value pair, find the corresponding
921 bincl in the list. Return the partial symtab associated
922 with that header_file_location. */
923
924 static struct partial_symtab *
925 find_corresponding_bincl_psymtab (char *name, int instance)
926 {
927 struct header_file_location *bincl;
928
929 for (bincl = bincl_list; bincl < next_bincl; bincl++)
930 if (bincl->instance == instance
931 && strcmp (name, bincl->name) == 0)
932 return bincl->pst;
933
934 repeated_header_complaint (name, symnum);
935 return (struct partial_symtab *) 0;
936 }
937
938 /* Free the storage allocated for the bincl list. */
939
940 static void
941 free_bincl_list (struct objfile *objfile)
942 {
943 xfree (bincl_list);
944 bincls_allocated = 0;
945 }
946
947 static void
948 do_free_bincl_list_cleanup (void *objfile)
949 {
950 free_bincl_list (objfile);
951 }
952
953 static struct cleanup *
954 make_cleanup_free_bincl_list (struct objfile *objfile)
955 {
956 return make_cleanup (do_free_bincl_list_cleanup, objfile);
957 }
958
959 /* Set namestring based on nlist. If the string table index is invalid,
960 give a fake name, and print a single error message per symbol file read,
961 rather than abort the symbol reading or flood the user with messages. */
962
963 static char *
964 set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
965 {
966 char *namestring;
967
968 if (((unsigned) nlist->n_strx + file_string_table_offset)
969 >= DBX_STRINGTAB_SIZE (objfile))
970 {
971 complaint (&symfile_complaints, _("bad string table offset in symbol %d"),
972 symnum);
973 namestring = "<bad string table offset>";
974 }
975 else
976 namestring = (nlist->n_strx + file_string_table_offset
977 + DBX_STRINGTAB (objfile));
978 return namestring;
979 }
980
981 /* Scan a SunOs dynamic symbol table for symbols of interest and
982 add them to the minimal symbol table. */
983
984 static void
985 read_dbx_dynamic_symtab (struct objfile *objfile)
986 {
987 bfd *abfd = objfile->obfd;
988 struct cleanup *back_to;
989 int counter;
990 long dynsym_size;
991 long dynsym_count;
992 asymbol **dynsyms;
993 asymbol **symptr;
994 arelent **relptr;
995 long dynrel_size;
996 long dynrel_count;
997 arelent **dynrels;
998 CORE_ADDR sym_value;
999 char *name;
1000
1001 /* Check that the symbol file has dynamic symbols that we know about.
1002 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1003 on a sun4 host (and vice versa) and bfd is not configured
1004 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1005 so we ignore the dynamic symbols in this case. */
1006 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1007 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1008 || bfd_get_arch (abfd) == bfd_arch_unknown)
1009 return;
1010
1011 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1012 if (dynsym_size < 0)
1013 return;
1014
1015 dynsyms = (asymbol **) xmalloc (dynsym_size);
1016 back_to = make_cleanup (xfree, dynsyms);
1017
1018 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1019 if (dynsym_count < 0)
1020 {
1021 do_cleanups (back_to);
1022 return;
1023 }
1024
1025 /* Enter dynamic symbols into the minimal symbol table
1026 if this is a stripped executable. */
1027 if (bfd_get_symcount (abfd) <= 0)
1028 {
1029 symptr = dynsyms;
1030 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1031 {
1032 asymbol *sym = *symptr;
1033 asection *sec;
1034 int type;
1035
1036 sec = bfd_get_section (sym);
1037
1038 /* BFD symbols are section relative. */
1039 sym_value = sym->value + sec->vma;
1040
1041 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1042 {
1043 sym_value += ANOFFSET (objfile->section_offsets,
1044 SECT_OFF_TEXT (objfile));
1045 type = N_TEXT;
1046 }
1047 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1048 {
1049 sym_value += ANOFFSET (objfile->section_offsets,
1050 SECT_OFF_DATA (objfile));
1051 type = N_DATA;
1052 }
1053 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1054 {
1055 sym_value += ANOFFSET (objfile->section_offsets,
1056 SECT_OFF_BSS (objfile));
1057 type = N_BSS;
1058 }
1059 else
1060 continue;
1061
1062 if (sym->flags & BSF_GLOBAL)
1063 type |= N_EXT;
1064
1065 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1066 type, objfile);
1067 }
1068 }
1069
1070 /* Symbols from shared libraries have a dynamic relocation entry
1071 that points to the associated slot in the procedure linkage table.
1072 We make a mininal symbol table entry with type mst_solib_trampoline
1073 at the address in the procedure linkage table. */
1074 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1075 if (dynrel_size < 0)
1076 {
1077 do_cleanups (back_to);
1078 return;
1079 }
1080
1081 dynrels = (arelent **) xmalloc (dynrel_size);
1082 make_cleanup (xfree, dynrels);
1083
1084 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1085 if (dynrel_count < 0)
1086 {
1087 do_cleanups (back_to);
1088 return;
1089 }
1090
1091 for (counter = 0, relptr = dynrels;
1092 counter < dynrel_count;
1093 counter++, relptr++)
1094 {
1095 arelent *rel = *relptr;
1096 CORE_ADDR address =
1097 rel->address + ANOFFSET (objfile->section_offsets,
1098 SECT_OFF_DATA (objfile));
1099
1100 switch (bfd_get_arch (abfd))
1101 {
1102 case bfd_arch_sparc:
1103 if (rel->howto->type != RELOC_JMP_SLOT)
1104 continue;
1105 break;
1106 case bfd_arch_m68k:
1107 /* `16' is the type BFD produces for a jump table relocation. */
1108 if (rel->howto->type != 16)
1109 continue;
1110
1111 /* Adjust address in the jump table to point to
1112 the start of the bsr instruction. */
1113 address -= 2;
1114 break;
1115 default:
1116 continue;
1117 }
1118
1119 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1120 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1121 objfile);
1122 }
1123
1124 do_cleanups (back_to);
1125 }
1126
1127 static CORE_ADDR
1128 find_stab_function_addr (char *namestring, char *filename,
1129 struct objfile *objfile)
1130 {
1131 struct minimal_symbol *msym;
1132 char *p;
1133 int n;
1134
1135 p = strchr (namestring, ':');
1136 if (p == NULL)
1137 p = namestring;
1138 n = p - namestring;
1139 p = alloca (n + 2);
1140 strncpy (p, namestring, n);
1141 p[n] = 0;
1142
1143 msym = lookup_minimal_symbol (p, filename, objfile);
1144 if (msym == NULL)
1145 {
1146 /* Sun Fortran appends an underscore to the minimal symbol name,
1147 try again with an appended underscore if the minimal symbol
1148 was not found. */
1149 p[n] = '_';
1150 p[n + 1] = 0;
1151 msym = lookup_minimal_symbol (p, filename, objfile);
1152 }
1153
1154 if (msym == NULL && filename != NULL)
1155 {
1156 /* Try again without the filename. */
1157 p[n] = 0;
1158 msym = lookup_minimal_symbol (p, NULL, objfile);
1159 }
1160 if (msym == NULL && filename != NULL)
1161 {
1162 /* And try again for Sun Fortran, but without the filename. */
1163 p[n] = '_';
1164 p[n + 1] = 0;
1165 msym = lookup_minimal_symbol (p, NULL, objfile);
1166 }
1167
1168 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1169 }
1170
1171 static void
1172 function_outside_compilation_unit_complaint (const char *arg1)
1173 {
1174 complaint (&symfile_complaints,
1175 _("function `%s' appears to be defined outside of all compilation \
1176 units"),
1177 arg1);
1178 }
1179
1180 /* Setup partial_symtab's describing each source file for which
1181 debugging information is available. */
1182
1183 static void
1184 read_dbx_symtab (struct objfile *objfile)
1185 {
1186 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1187 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1188 struct internal_nlist nlist;
1189 CORE_ADDR text_addr;
1190 int text_size;
1191 char *sym_name;
1192 int sym_len;
1193
1194 char *namestring;
1195 int nsl;
1196 int past_first_source_file = 0;
1197 CORE_ADDR last_o_file_start = 0;
1198 CORE_ADDR last_function_start = 0;
1199 struct cleanup *back_to;
1200 bfd *abfd;
1201 int textlow_not_set;
1202 int data_sect_index;
1203
1204 /* Current partial symtab */
1205 struct partial_symtab *pst;
1206
1207 /* List of current psymtab's include files */
1208 char **psymtab_include_list;
1209 int includes_allocated;
1210 int includes_used;
1211
1212 /* Index within current psymtab dependency list */
1213 struct partial_symtab **dependency_list;
1214 int dependencies_used, dependencies_allocated;
1215
1216 text_addr = DBX_TEXT_ADDR (objfile);
1217 text_size = DBX_TEXT_SIZE (objfile);
1218
1219 /* FIXME. We probably want to change stringtab_global rather than add this
1220 while processing every symbol entry. FIXME. */
1221 file_string_table_offset = 0;
1222 next_file_string_table_offset = 0;
1223
1224 stringtab_global = DBX_STRINGTAB (objfile);
1225
1226 pst = (struct partial_symtab *) 0;
1227
1228 includes_allocated = 30;
1229 includes_used = 0;
1230 psymtab_include_list = (char **) alloca (includes_allocated *
1231 sizeof (char *));
1232
1233 dependencies_allocated = 30;
1234 dependencies_used = 0;
1235 dependency_list =
1236 (struct partial_symtab **) alloca (dependencies_allocated *
1237 sizeof (struct partial_symtab *));
1238
1239 /* Init bincl list */
1240 init_bincl_list (20, objfile);
1241 back_to = make_cleanup_free_bincl_list (objfile);
1242
1243 last_source_file = NULL;
1244
1245 lowest_text_address = (CORE_ADDR) -1;
1246
1247 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1248 abfd = objfile->obfd;
1249 symbuf_end = symbuf_idx = 0;
1250 next_symbol_text_func = dbx_next_symbol_text;
1251 textlow_not_set = 1;
1252 has_line_numbers = 0;
1253
1254 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1255 to global and static variables. The stab for a global or static
1256 variable doesn't give us any indication of which section it's in,
1257 so we can't tell immediately which offset in
1258 objfile->section_offsets we should apply to the variable's
1259 address.
1260
1261 We could certainly find out which section contains the variable
1262 by looking up the variable's unrelocated address with
1263 find_pc_section, but that would be expensive; this is the
1264 function that constructs the partial symbol tables by examining
1265 every symbol in the entire executable, and it's
1266 performance-critical. So that expense would not be welcome. I'm
1267 not sure what to do about this at the moment.
1268
1269 What we have done for years is to simply assume that the .data
1270 section's offset is appropriate for all global and static
1271 variables. Recently, this was expanded to fall back to the .bss
1272 section's offset if there is no .data section, and then to the
1273 .rodata section's offset. */
1274 data_sect_index = objfile->sect_index_data;
1275 if (data_sect_index == -1)
1276 data_sect_index = SECT_OFF_BSS (objfile);
1277 if (data_sect_index == -1)
1278 data_sect_index = SECT_OFF_RODATA (objfile);
1279
1280 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1281 for the file to have no .data, no .bss, and no .text at all, if
1282 it also has no global or static variables. If it does, we will
1283 get an internal error from an ANOFFSET macro below when we try to
1284 use data_sect_index. */
1285
1286 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1287 {
1288 /* Get the symbol for this run and pull out some info */
1289 QUIT; /* allow this to be interruptable */
1290 if (symbuf_idx == symbuf_end)
1291 fill_symbuf (abfd);
1292 bufp = &symbuf[symbuf_idx++];
1293
1294 /*
1295 * Special case to speed up readin.
1296 */
1297 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1298 {
1299 has_line_numbers = 1;
1300 continue;
1301 }
1302
1303 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1304 OBJSTAT (objfile, n_stabs++);
1305
1306 /* Ok. There is a lot of code duplicated in the rest of this
1307 switch statement (for efficiency reasons). Since I don't
1308 like duplicating code, I will do my penance here, and
1309 describe the code which is duplicated:
1310
1311 *) The assignment to namestring.
1312 *) The call to strchr.
1313 *) The addition of a partial symbol the the two partial
1314 symbol lists. This last is a large section of code, so
1315 I've imbedded it in the following macro.
1316 */
1317
1318 switch (nlist.n_type)
1319 {
1320 /*
1321 * Standard, external, non-debugger, symbols
1322 */
1323
1324 case N_TEXT | N_EXT:
1325 case N_NBTEXT | N_EXT:
1326 nlist.n_value += ANOFFSET (objfile->section_offsets,
1327 SECT_OFF_TEXT (objfile));
1328 goto record_it;
1329
1330 case N_DATA | N_EXT:
1331 case N_NBDATA | N_EXT:
1332 nlist.n_value += ANOFFSET (objfile->section_offsets,
1333 SECT_OFF_DATA (objfile));
1334 goto record_it;
1335
1336 case N_BSS:
1337 case N_BSS | N_EXT:
1338 case N_NBBSS | N_EXT:
1339 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1340 nlist.n_value += ANOFFSET (objfile->section_offsets,
1341 SECT_OFF_BSS (objfile));
1342 goto record_it;
1343
1344 case N_ABS | N_EXT:
1345 record_it:
1346 namestring = set_namestring (objfile, &nlist);
1347
1348 bss_ext_symbol:
1349 record_minimal_symbol (namestring, nlist.n_value,
1350 nlist.n_type, objfile); /* Always */
1351 continue;
1352
1353 /* Standard, local, non-debugger, symbols */
1354
1355 case N_NBTEXT:
1356
1357 /* We need to be able to deal with both N_FN or N_TEXT,
1358 because we have no way of knowing whether the sys-supplied ld
1359 or GNU ld was used to make the executable. Sequents throw
1360 in another wrinkle -- they renumbered N_FN. */
1361
1362 case N_FN:
1363 case N_FN_SEQ:
1364 case N_TEXT:
1365 nlist.n_value += ANOFFSET (objfile->section_offsets,
1366 SECT_OFF_TEXT (objfile));
1367 namestring = set_namestring (objfile, &nlist);
1368
1369 if ((namestring[0] == '-' && namestring[1] == 'l')
1370 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1371 && namestring[nsl - 2] == '.'))
1372 {
1373 if (past_first_source_file && pst
1374 /* The gould NP1 uses low values for .o and -l symbols
1375 which are not the address. */
1376 && nlist.n_value >= pst->textlow)
1377 {
1378 end_psymtab (pst, psymtab_include_list, includes_used,
1379 symnum * symbol_size,
1380 nlist.n_value > pst->texthigh
1381 ? nlist.n_value : pst->texthigh,
1382 dependency_list, dependencies_used,
1383 textlow_not_set);
1384 pst = (struct partial_symtab *) 0;
1385 includes_used = 0;
1386 dependencies_used = 0;
1387 }
1388 else
1389 past_first_source_file = 1;
1390 last_o_file_start = nlist.n_value;
1391 }
1392 else
1393 goto record_it;
1394 continue;
1395
1396 case N_DATA:
1397 nlist.n_value += ANOFFSET (objfile->section_offsets,
1398 SECT_OFF_DATA (objfile));
1399 goto record_it;
1400
1401 case N_UNDF | N_EXT:
1402 if (nlist.n_value != 0)
1403 {
1404 /* This is a "Fortran COMMON" symbol. See if the target
1405 environment knows where it has been relocated to. */
1406
1407 CORE_ADDR reladdr;
1408
1409 namestring = set_namestring (objfile, &nlist);
1410 if (target_lookup_symbol (namestring, &reladdr))
1411 {
1412 continue; /* Error in lookup; ignore symbol for now. */
1413 }
1414 nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */
1415 nlist.n_value = reladdr;
1416 goto bss_ext_symbol;
1417 }
1418 continue; /* Just undefined, not COMMON */
1419
1420 case N_UNDF:
1421 if (processing_acc_compilation && nlist.n_strx == 1)
1422 {
1423 /* Deal with relative offsets in the string table
1424 used in ELF+STAB under Solaris. If we want to use the
1425 n_strx field, which contains the name of the file,
1426 we must adjust file_string_table_offset *before* calling
1427 set_namestring(). */
1428 past_first_source_file = 1;
1429 file_string_table_offset = next_file_string_table_offset;
1430 next_file_string_table_offset =
1431 file_string_table_offset + nlist.n_value;
1432 if (next_file_string_table_offset < file_string_table_offset)
1433 error (_("string table offset backs up at %d"), symnum);
1434 /* FIXME -- replace error() with complaint. */
1435 continue;
1436 }
1437 continue;
1438
1439 /* Lots of symbol types we can just ignore. */
1440
1441 case N_ABS:
1442 case N_NBDATA:
1443 case N_NBBSS:
1444 continue;
1445
1446 /* Keep going . . . */
1447
1448 /*
1449 * Special symbol types for GNU
1450 */
1451 case N_INDR:
1452 case N_INDR | N_EXT:
1453 case N_SETA:
1454 case N_SETA | N_EXT:
1455 case N_SETT:
1456 case N_SETT | N_EXT:
1457 case N_SETD:
1458 case N_SETD | N_EXT:
1459 case N_SETB:
1460 case N_SETB | N_EXT:
1461 case N_SETV:
1462 continue;
1463
1464 /*
1465 * Debugger symbols
1466 */
1467
1468 case N_SO:
1469 {
1470 CORE_ADDR valu;
1471 static int prev_so_symnum = -10;
1472 static int first_so_symnum;
1473 char *p;
1474 static char *dirname_nso;
1475 int prev_textlow_not_set;
1476
1477 valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
1478 SECT_OFF_TEXT (objfile));
1479
1480 prev_textlow_not_set = textlow_not_set;
1481
1482 /* A zero value is probably an indication for the SunPRO 3.0
1483 compiler. end_psymtab explicitly tests for zero, so
1484 don't relocate it. */
1485
1486 if (nlist.n_value == 0
1487 && gdbarch_sofun_address_maybe_missing (gdbarch))
1488 {
1489 textlow_not_set = 1;
1490 valu = 0;
1491 }
1492 else
1493 textlow_not_set = 0;
1494
1495 past_first_source_file = 1;
1496
1497 if (prev_so_symnum != symnum - 1)
1498 { /* Here if prev stab wasn't N_SO */
1499 first_so_symnum = symnum;
1500
1501 if (pst)
1502 {
1503 end_psymtab (pst, psymtab_include_list, includes_used,
1504 symnum * symbol_size,
1505 valu > pst->texthigh ? valu : pst->texthigh,
1506 dependency_list, dependencies_used,
1507 prev_textlow_not_set);
1508 pst = (struct partial_symtab *) 0;
1509 includes_used = 0;
1510 dependencies_used = 0;
1511 }
1512 }
1513
1514 prev_so_symnum = symnum;
1515
1516 /* End the current partial symtab and start a new one */
1517
1518 namestring = set_namestring (objfile, &nlist);
1519
1520 /* Null name means end of .o file. Don't start a new one. */
1521 if (*namestring == '\000')
1522 continue;
1523
1524 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1525 The first one is a directory name; the second the file name.
1526 If pst exists, is empty, and has a filename ending in '/',
1527 we assume the previous N_SO was a directory name. */
1528
1529 p = strrchr (namestring, '/');
1530 if (p && *(p + 1) == '\000')
1531 {
1532 /* Save the directory name SOs locally, then save it into
1533 the psymtab when it's created below. */
1534 dirname_nso = namestring;
1535 continue;
1536 }
1537
1538 /* Some other compilers (C++ ones in particular) emit useless
1539 SOs for non-existant .c files. We ignore all subsequent SOs
1540 that immediately follow the first. */
1541
1542 if (!pst)
1543 {
1544 pst = start_psymtab (objfile,
1545 namestring, valu,
1546 first_so_symnum * symbol_size,
1547 objfile->global_psymbols.next,
1548 objfile->static_psymbols.next);
1549 pst->dirname = dirname_nso;
1550 dirname_nso = NULL;
1551 }
1552 continue;
1553 }
1554
1555 case N_BINCL:
1556 {
1557 enum language tmp_language;
1558 /* Add this bincl to the bincl_list for future EXCLs. No
1559 need to save the string; it'll be around until
1560 read_dbx_symtab function returns */
1561
1562 namestring = set_namestring (objfile, &nlist);
1563 tmp_language = deduce_language_from_filename (namestring);
1564
1565 /* Only change the psymtab's language if we've learned
1566 something useful (eg. tmp_language is not language_unknown).
1567 In addition, to match what start_subfile does, never change
1568 from C++ to C. */
1569 if (tmp_language != language_unknown
1570 && (tmp_language != language_c
1571 || psymtab_language != language_cplus))
1572 psymtab_language = tmp_language;
1573
1574 if (pst == NULL)
1575 {
1576 /* FIXME: we should not get here without a PST to work on.
1577 Attempt to recover. */
1578 complaint (&symfile_complaints,
1579 _("N_BINCL %s not in entries for any file, at symtab \
1580 pos %d"),
1581 namestring, symnum);
1582 continue;
1583 }
1584 add_bincl_to_list (pst, namestring, nlist.n_value);
1585
1586 /* Mark down an include file in the current psymtab */
1587
1588 goto record_include_file;
1589 }
1590
1591 case N_SOL:
1592 {
1593 enum language tmp_language;
1594 /* Mark down an include file in the current psymtab */
1595
1596 namestring = set_namestring (objfile, &nlist);
1597 tmp_language = deduce_language_from_filename (namestring);
1598
1599 /* Only change the psymtab's language if we've learned
1600 something useful (eg. tmp_language is not language_unknown).
1601 In addition, to match what start_subfile does, never change
1602 from C++ to C. */
1603 if (tmp_language != language_unknown
1604 && (tmp_language != language_c
1605 || psymtab_language != language_cplus))
1606 psymtab_language = tmp_language;
1607
1608 /* In C++, one may expect the same filename to come round many
1609 times, when code is coming alternately from the main file
1610 and from inline functions in other files. So I check to see
1611 if this is a file we've seen before -- either the main
1612 source file, or a previously included file.
1613
1614 This seems to be a lot of time to be spending on N_SOL, but
1615 things like "break c-exp.y:435" need to work (I
1616 suppose the psymtab_include_list could be hashed or put
1617 in a binary tree, if profiling shows this is a major hog). */
1618 if (pst && strcmp (namestring, pst->filename) == 0)
1619 continue;
1620 {
1621 int i;
1622 for (i = 0; i < includes_used; i++)
1623 if (strcmp (namestring, psymtab_include_list[i]) == 0)
1624 {
1625 i = -1;
1626 break;
1627 }
1628 if (i == -1)
1629 continue;
1630 }
1631
1632 record_include_file:
1633
1634 psymtab_include_list[includes_used++] = namestring;
1635 if (includes_used >= includes_allocated)
1636 {
1637 char **orig = psymtab_include_list;
1638
1639 psymtab_include_list = (char **)
1640 alloca ((includes_allocated *= 2) * sizeof (char *));
1641 memcpy (psymtab_include_list, orig,
1642 includes_used * sizeof (char *));
1643 }
1644 continue;
1645 }
1646 case N_LSYM: /* Typedef or automatic variable. */
1647 case N_STSYM: /* Data seg var -- static */
1648 case N_LCSYM: /* BSS " */
1649 case N_ROSYM: /* Read-only data seg var -- static. */
1650 case N_NBSTS: /* Gould nobase. */
1651 case N_NBLCS: /* symbols. */
1652 case N_FUN:
1653 case N_GSYM: /* Global (extern) variable; can be
1654 data or bss (sigh FIXME). */
1655
1656 /* Following may probably be ignored; I'll leave them here
1657 for now (until I do Pascal and Modula 2 extensions). */
1658
1659 case N_PC: /* I may or may not need this; I
1660 suspect not. */
1661 case N_M2C: /* I suspect that I can ignore this here. */
1662 case N_SCOPE: /* Same. */
1663 {
1664 char *p;
1665
1666 namestring = set_namestring (objfile, &nlist);
1667
1668 /* See if this is an end of function stab. */
1669 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1670 {
1671 CORE_ADDR valu;
1672
1673 /* It's value is the size (in bytes) of the function for
1674 function relative stabs, or the address of the function's
1675 end for old style stabs. */
1676 valu = nlist.n_value + last_function_start;
1677 if (pst->texthigh == 0 || valu > pst->texthigh)
1678 pst->texthigh = valu;
1679 break;
1680 }
1681
1682 p = (char *) strchr (namestring, ':');
1683 if (!p)
1684 continue; /* Not a debugging symbol. */
1685
1686 sym_len = 0;
1687 sym_name = NULL; /* pacify "gcc -Werror" */
1688 if (psymtab_language == language_cplus)
1689 {
1690 char *new_name, *name = alloca (p - namestring + 1);
1691 memcpy (name, namestring, p - namestring);
1692 name[p - namestring] = '\0';
1693 new_name = cp_canonicalize_string (name);
1694 if (new_name != NULL)
1695 {
1696 sym_len = strlen (new_name);
1697 sym_name = obsavestring (new_name, sym_len,
1698 &objfile->objfile_obstack);
1699 xfree (new_name);
1700 }
1701 }
1702
1703 if (sym_len == 0)
1704 {
1705 sym_name = namestring;
1706 sym_len = p - namestring;
1707 }
1708
1709 /* Main processing section for debugging symbols which
1710 the initial read through the symbol tables needs to worry
1711 about. If we reach this point, the symbol which we are
1712 considering is definitely one we are interested in.
1713 p must also contain the (valid) index into the namestring
1714 which indicates the debugging type symbol. */
1715
1716 switch (p[1])
1717 {
1718 case 'S':
1719 nlist.n_value += ANOFFSET (objfile->section_offsets,
1720 data_sect_index);
1721
1722 if (gdbarch_static_transform_name_p (gdbarch))
1723 namestring = gdbarch_static_transform_name (gdbarch,
1724 namestring);
1725
1726 add_psymbol_to_list (sym_name, sym_len,
1727 VAR_DOMAIN, LOC_STATIC,
1728 &objfile->static_psymbols,
1729 0, nlist.n_value,
1730 psymtab_language, objfile);
1731 continue;
1732
1733 case 'G':
1734 nlist.n_value += ANOFFSET (objfile->section_offsets,
1735 data_sect_index);
1736 /* The addresses in these entries are reported to be
1737 wrong. See the code that reads 'G's for symtabs. */
1738 add_psymbol_to_list (sym_name, sym_len,
1739 VAR_DOMAIN, LOC_STATIC,
1740 &objfile->global_psymbols,
1741 0, nlist.n_value,
1742 psymtab_language, objfile);
1743 continue;
1744
1745 case 'T':
1746 /* When a 'T' entry is defining an anonymous enum, it
1747 may have a name which is the empty string, or a
1748 single space. Since they're not really defining a
1749 symbol, those shouldn't go in the partial symbol
1750 table. We do pick up the elements of such enums at
1751 'check_enum:', below. */
1752 if (p >= namestring + 2
1753 || (p == namestring + 1
1754 && namestring[0] != ' '))
1755 {
1756 add_psymbol_to_list (sym_name, sym_len,
1757 STRUCT_DOMAIN, LOC_TYPEDEF,
1758 &objfile->static_psymbols,
1759 nlist.n_value, 0,
1760 psymtab_language, objfile);
1761 if (p[2] == 't')
1762 {
1763 /* Also a typedef with the same name. */
1764 add_psymbol_to_list (sym_name, sym_len,
1765 VAR_DOMAIN, LOC_TYPEDEF,
1766 &objfile->static_psymbols,
1767 nlist.n_value, 0,
1768 psymtab_language, objfile);
1769 p += 1;
1770 }
1771 }
1772 goto check_enum;
1773
1774 case 't':
1775 if (p != namestring) /* a name is there, not just :T... */
1776 {
1777 add_psymbol_to_list (sym_name, sym_len,
1778 VAR_DOMAIN, LOC_TYPEDEF,
1779 &objfile->static_psymbols,
1780 nlist.n_value, 0,
1781 psymtab_language, objfile);
1782 }
1783 check_enum:
1784 /* If this is an enumerated type, we need to
1785 add all the enum constants to the partial symbol
1786 table. This does not cover enums without names, e.g.
1787 "enum {a, b} c;" in C, but fortunately those are
1788 rare. There is no way for GDB to find those from the
1789 enum type without spending too much time on it. Thus
1790 to solve this problem, the compiler needs to put out the
1791 enum in a nameless type. GCC2 does this. */
1792
1793 /* We are looking for something of the form
1794 <name> ":" ("t" | "T") [<number> "="] "e"
1795 {<constant> ":" <value> ","} ";". */
1796
1797 /* Skip over the colon and the 't' or 'T'. */
1798 p += 2;
1799 /* This type may be given a number. Also, numbers can come
1800 in pairs like (0,26). Skip over it. */
1801 while ((*p >= '0' && *p <= '9')
1802 || *p == '(' || *p == ',' || *p == ')'
1803 || *p == '=')
1804 p++;
1805
1806 if (*p++ == 'e')
1807 {
1808 /* The aix4 compiler emits extra crud before the members. */
1809 if (*p == '-')
1810 {
1811 /* Skip over the type (?). */
1812 while (*p != ':')
1813 p++;
1814
1815 /* Skip over the colon. */
1816 p++;
1817 }
1818
1819 /* We have found an enumerated type. */
1820 /* According to comments in read_enum_type
1821 a comma could end it instead of a semicolon.
1822 I don't know where that happens.
1823 Accept either. */
1824 while (*p && *p != ';' && *p != ',')
1825 {
1826 char *q;
1827
1828 /* Check for and handle cretinous dbx symbol name
1829 continuation! */
1830 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1831 p = next_symbol_text (objfile);
1832
1833 /* Point to the character after the name
1834 of the enum constant. */
1835 for (q = p; *q && *q != ':'; q++)
1836 ;
1837 /* Note that the value doesn't matter for
1838 enum constants in psymtabs, just in symtabs. */
1839 add_psymbol_to_list (p, q - p,
1840 VAR_DOMAIN, LOC_CONST,
1841 &objfile->static_psymbols, 0,
1842 0, psymtab_language, objfile);
1843 /* Point past the name. */
1844 p = q;
1845 /* Skip over the value. */
1846 while (*p && *p != ',')
1847 p++;
1848 /* Advance past the comma. */
1849 if (*p)
1850 p++;
1851 }
1852 }
1853 continue;
1854
1855 case 'c':
1856 /* Constant, e.g. from "const" in Pascal. */
1857 add_psymbol_to_list (sym_name, sym_len,
1858 VAR_DOMAIN, LOC_CONST,
1859 &objfile->static_psymbols, nlist.n_value,
1860 0, psymtab_language, objfile);
1861 continue;
1862
1863 case 'f':
1864 if (! pst)
1865 {
1866 int name_len = p - namestring;
1867 char *name = xmalloc (name_len + 1);
1868 memcpy (name, namestring, name_len);
1869 name[name_len] = '\0';
1870 function_outside_compilation_unit_complaint (name);
1871 xfree (name);
1872 }
1873 nlist.n_value += ANOFFSET (objfile->section_offsets,
1874 SECT_OFF_TEXT (objfile));
1875 /* Kludges for ELF/STABS with Sun ACC */
1876 last_function_name = namestring;
1877 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1878 value for the bottom of the text seg in those cases. */
1879 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1880 SECT_OFF_TEXT (objfile))
1881 && gdbarch_sofun_address_maybe_missing (gdbarch))
1882 {
1883 CORE_ADDR minsym_valu =
1884 find_stab_function_addr (namestring,
1885 pst ? pst->filename : NULL,
1886 objfile);
1887 /* find_stab_function_addr will return 0 if the minimal
1888 symbol wasn't found. (Unfortunately, this might also
1889 be a valid address.) Anyway, if it *does* return 0,
1890 it is likely that the value was set correctly to begin
1891 with... */
1892 if (minsym_valu != 0)
1893 nlist.n_value = minsym_valu;
1894 }
1895 if (pst && textlow_not_set
1896 && gdbarch_sofun_address_maybe_missing (gdbarch))
1897 {
1898 pst->textlow = nlist.n_value;
1899 textlow_not_set = 0;
1900 }
1901 /* End kludge. */
1902
1903 /* Keep track of the start of the last function so we
1904 can handle end of function symbols. */
1905 last_function_start = nlist.n_value;
1906
1907 /* In reordered executables this function may lie outside
1908 the bounds created by N_SO symbols. If that's the case
1909 use the address of this function as the low bound for
1910 the partial symbol table. */
1911 if (pst
1912 && (textlow_not_set
1913 || (nlist.n_value < pst->textlow
1914 && (nlist.n_value
1915 != ANOFFSET (objfile->section_offsets,
1916 SECT_OFF_TEXT (objfile))))))
1917 {
1918 pst->textlow = nlist.n_value;
1919 textlow_not_set = 0;
1920 }
1921 add_psymbol_to_list (sym_name, sym_len,
1922 VAR_DOMAIN, LOC_BLOCK,
1923 &objfile->static_psymbols,
1924 0, nlist.n_value,
1925 psymtab_language, objfile);
1926 continue;
1927
1928 /* Global functions were ignored here, but now they
1929 are put into the global psymtab like one would expect.
1930 They're also in the minimal symbol table. */
1931 case 'F':
1932 if (! pst)
1933 {
1934 int name_len = p - namestring;
1935 char *name = xmalloc (name_len + 1);
1936 memcpy (name, namestring, name_len);
1937 name[name_len] = '\0';
1938 function_outside_compilation_unit_complaint (name);
1939 xfree (name);
1940 }
1941 nlist.n_value += ANOFFSET (objfile->section_offsets,
1942 SECT_OFF_TEXT (objfile));
1943 /* Kludges for ELF/STABS with Sun ACC */
1944 last_function_name = namestring;
1945 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1946 value for the bottom of the text seg in those cases. */
1947 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1948 SECT_OFF_TEXT (objfile))
1949 && gdbarch_sofun_address_maybe_missing (gdbarch))
1950 {
1951 CORE_ADDR minsym_valu =
1952 find_stab_function_addr (namestring,
1953 pst ? pst->filename : NULL,
1954 objfile);
1955 /* find_stab_function_addr will return 0 if the minimal
1956 symbol wasn't found. (Unfortunately, this might also
1957 be a valid address.) Anyway, if it *does* return 0,
1958 it is likely that the value was set correctly to begin
1959 with... */
1960 if (minsym_valu != 0)
1961 nlist.n_value = minsym_valu;
1962 }
1963 if (pst && textlow_not_set
1964 && gdbarch_sofun_address_maybe_missing (gdbarch))
1965 {
1966 pst->textlow = nlist.n_value;
1967 textlow_not_set = 0;
1968 }
1969 /* End kludge. */
1970
1971 /* Keep track of the start of the last function so we
1972 can handle end of function symbols. */
1973 last_function_start = nlist.n_value;
1974
1975 /* In reordered executables this function may lie outside
1976 the bounds created by N_SO symbols. If that's the case
1977 use the address of this function as the low bound for
1978 the partial symbol table. */
1979 if (pst
1980 && (textlow_not_set
1981 || (nlist.n_value < pst->textlow
1982 && (nlist.n_value
1983 != ANOFFSET (objfile->section_offsets,
1984 SECT_OFF_TEXT (objfile))))))
1985 {
1986 pst->textlow = nlist.n_value;
1987 textlow_not_set = 0;
1988 }
1989 add_psymbol_to_list (sym_name, sym_len,
1990 VAR_DOMAIN, LOC_BLOCK,
1991 &objfile->global_psymbols,
1992 0, nlist.n_value,
1993 psymtab_language, objfile);
1994 continue;
1995
1996 /* Two things show up here (hopefully); static symbols of
1997 local scope (static used inside braces) or extensions
1998 of structure symbols. We can ignore both. */
1999 case 'V':
2000 case '(':
2001 case '0':
2002 case '1':
2003 case '2':
2004 case '3':
2005 case '4':
2006 case '5':
2007 case '6':
2008 case '7':
2009 case '8':
2010 case '9':
2011 case '-':
2012 case '#': /* for symbol identification (used in live ranges) */
2013 continue;
2014
2015 case ':':
2016 /* It is a C++ nested symbol. We don't need to record it
2017 (I don't think); if we try to look up foo::bar::baz,
2018 then symbols for the symtab containing foo should get
2019 read in, I think. */
2020 /* Someone says sun cc puts out symbols like
2021 /foo/baz/maclib::/usr/local/bin/maclib,
2022 which would get here with a symbol type of ':'. */
2023 continue;
2024
2025 default:
2026 /* Unexpected symbol descriptor. The second and subsequent stabs
2027 of a continued stab can show up here. The question is
2028 whether they ever can mimic a normal stab--it would be
2029 nice if not, since we certainly don't want to spend the
2030 time searching to the end of every string looking for
2031 a backslash. */
2032
2033 complaint (&symfile_complaints, _("unknown symbol descriptor `%c'"),
2034 p[1]);
2035
2036 /* Ignore it; perhaps it is an extension that we don't
2037 know about. */
2038 continue;
2039 }
2040 }
2041
2042 case N_EXCL:
2043
2044 namestring = set_namestring (objfile, &nlist);
2045
2046 /* Find the corresponding bincl and mark that psymtab on the
2047 psymtab dependency list */
2048 {
2049 struct partial_symtab *needed_pst =
2050 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2051
2052 /* If this include file was defined earlier in this file,
2053 leave it alone. */
2054 if (needed_pst == pst)
2055 continue;
2056
2057 if (needed_pst)
2058 {
2059 int i;
2060 int found = 0;
2061
2062 for (i = 0; i < dependencies_used; i++)
2063 if (dependency_list[i] == needed_pst)
2064 {
2065 found = 1;
2066 break;
2067 }
2068
2069 /* If it's already in the list, skip the rest. */
2070 if (found)
2071 continue;
2072
2073 dependency_list[dependencies_used++] = needed_pst;
2074 if (dependencies_used >= dependencies_allocated)
2075 {
2076 struct partial_symtab **orig = dependency_list;
2077 dependency_list =
2078 (struct partial_symtab **)
2079 alloca ((dependencies_allocated *= 2)
2080 * sizeof (struct partial_symtab *));
2081 memcpy (dependency_list, orig,
2082 (dependencies_used
2083 * sizeof (struct partial_symtab *)));
2084 #ifdef DEBUG_INFO
2085 fprintf_unfiltered (gdb_stderr,
2086 "Had to reallocate dependency list.\n");
2087 fprintf_unfiltered (gdb_stderr,
2088 "New dependencies allocated: %d\n",
2089 dependencies_allocated);
2090 #endif
2091 }
2092 }
2093 }
2094 continue;
2095
2096 case N_ENDM:
2097 /* Solaris 2 end of module, finish current partial symbol table.
2098 end_psymtab will set pst->texthigh to the proper value, which
2099 is necessary if a module compiled without debugging info
2100 follows this module. */
2101 if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
2102 {
2103 end_psymtab (pst, psymtab_include_list, includes_used,
2104 symnum * symbol_size,
2105 (CORE_ADDR) 0,
2106 dependency_list, dependencies_used, textlow_not_set);
2107 pst = (struct partial_symtab *) 0;
2108 includes_used = 0;
2109 dependencies_used = 0;
2110 }
2111 continue;
2112
2113 case N_RBRAC:
2114 #ifdef HANDLE_RBRAC
2115 HANDLE_RBRAC (nlist.n_value);
2116 continue;
2117 #endif
2118 case N_EINCL:
2119 case N_DSLINE:
2120 case N_BSLINE:
2121 case N_SSYM: /* Claim: Structure or union element.
2122 Hopefully, I can ignore this. */
2123 case N_ENTRY: /* Alternate entry point; can ignore. */
2124 case N_MAIN: /* Can definitely ignore this. */
2125 case N_CATCH: /* These are GNU C++ extensions */
2126 case N_EHDECL: /* that can safely be ignored here. */
2127 case N_LENG:
2128 case N_BCOMM:
2129 case N_ECOMM:
2130 case N_ECOML:
2131 case N_FNAME:
2132 case N_SLINE:
2133 case N_RSYM:
2134 case N_PSYM:
2135 case N_LBRAC:
2136 case N_NSYMS: /* Ultrix 4.0: symbol count */
2137 case N_DEFD: /* GNU Modula-2 */
2138 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2139
2140 case N_OBJ: /* useless types from Solaris */
2141 case N_OPT:
2142 case N_PATCH:
2143 /* These symbols aren't interesting; don't worry about them */
2144
2145 continue;
2146
2147 default:
2148 /* If we haven't found it yet, ignore it. It's probably some
2149 new type we don't know about yet. */
2150 unknown_symtype_complaint (hex_string (nlist.n_type));
2151 continue;
2152 }
2153 }
2154
2155 /* If there's stuff to be cleaned up, clean it up. */
2156 if (pst)
2157 {
2158 /* Don't set pst->texthigh lower than it already is. */
2159 CORE_ADDR text_end =
2160 (lowest_text_address == (CORE_ADDR) -1
2161 ? (text_addr + ANOFFSET (objfile->section_offsets,
2162 SECT_OFF_TEXT (objfile)))
2163 : lowest_text_address)
2164 + text_size;
2165
2166 end_psymtab (pst, psymtab_include_list, includes_used,
2167 symnum * symbol_size,
2168 text_end > pst->texthigh ? text_end : pst->texthigh,
2169 dependency_list, dependencies_used, textlow_not_set);
2170 }
2171
2172 do_cleanups (back_to);
2173 }
2174
2175 /* Allocate and partially fill a partial symtab. It will be
2176 completely filled at the end of the symbol list.
2177
2178 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2179 is the address relative to which its symbols are (incremental) or 0
2180 (normal). */
2181
2182 static struct partial_symtab *
2183 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2184 int ldsymoff, struct partial_symbol **global_syms,
2185 struct partial_symbol **static_syms)
2186 {
2187 struct partial_symtab *result =
2188 start_psymtab_common (objfile, objfile->section_offsets,
2189 filename, textlow, global_syms, static_syms);
2190
2191 result->read_symtab_private = (char *)
2192 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2193 LDSYMOFF (result) = ldsymoff;
2194 result->read_symtab = dbx_psymtab_to_symtab;
2195 SYMBOL_SIZE (result) = symbol_size;
2196 SYMBOL_OFFSET (result) = symbol_table_offset;
2197 STRING_OFFSET (result) = string_table_offset;
2198 FILE_STRING_OFFSET (result) = file_string_table_offset;
2199
2200 #ifdef HAVE_ELF
2201 /* If we're handling an ELF file, drag some section-relocation info
2202 for this source file out of the ELF symbol table, to compensate for
2203 Sun brain death. This replaces the section_offsets in this psymtab,
2204 if successful. */
2205 elfstab_offset_sections (objfile, result);
2206 #endif
2207
2208 /* Deduce the source language from the filename for this psymtab. */
2209 psymtab_language = deduce_language_from_filename (filename);
2210
2211 return result;
2212 }
2213
2214 /* Close off the current usage of PST.
2215 Returns PST or NULL if the partial symtab was empty and thrown away.
2216
2217 FIXME: List variables and peculiarities of same. */
2218
2219 struct partial_symtab *
2220 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
2221 int capping_symbol_offset, CORE_ADDR capping_text,
2222 struct partial_symtab **dependency_list, int number_dependencies,
2223 int textlow_not_set)
2224 {
2225 int i;
2226 struct objfile *objfile = pst->objfile;
2227 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2228
2229 if (capping_symbol_offset != -1)
2230 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2231 pst->texthigh = capping_text;
2232
2233 /* Under Solaris, the N_SO symbols always have a value of 0,
2234 instead of the usual address of the .o file. Therefore,
2235 we have to do some tricks to fill in texthigh and textlow.
2236 The first trick is: if we see a static
2237 or global function, and the textlow for the current pst
2238 is not set (ie: textlow_not_set), then we use that function's
2239 address for the textlow of the pst. */
2240
2241 /* Now, to fill in texthigh, we remember the last function seen
2242 in the .o file. Also, there's a hack in
2243 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2244 to here via the misc_info field. Therefore, we can fill in
2245 a reliable texthigh by taking the address plus size of the
2246 last function in the file. */
2247
2248 if (pst->texthigh == 0 && last_function_name
2249 && gdbarch_sofun_address_maybe_missing (gdbarch))
2250 {
2251 char *p;
2252 int n;
2253 struct minimal_symbol *minsym;
2254
2255 p = strchr (last_function_name, ':');
2256 if (p == NULL)
2257 p = last_function_name;
2258 n = p - last_function_name;
2259 p = alloca (n + 2);
2260 strncpy (p, last_function_name, n);
2261 p[n] = 0;
2262
2263 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2264 if (minsym == NULL)
2265 {
2266 /* Sun Fortran appends an underscore to the minimal symbol name,
2267 try again with an appended underscore if the minimal symbol
2268 was not found. */
2269 p[n] = '_';
2270 p[n + 1] = 0;
2271 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2272 }
2273
2274 if (minsym)
2275 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2276
2277 last_function_name = NULL;
2278 }
2279
2280 if (!gdbarch_sofun_address_maybe_missing (gdbarch))
2281 ;
2282 /* this test will be true if the last .o file is only data */
2283 else if (textlow_not_set)
2284 pst->textlow = pst->texthigh;
2285 else
2286 {
2287 struct partial_symtab *p1;
2288
2289 /* If we know our own starting text address, then walk through all other
2290 psymtabs for this objfile, and if any didn't know their ending text
2291 address, set it to our starting address. Take care to not set our
2292 own ending address to our starting address, nor to set addresses on
2293 `dependency' files that have both textlow and texthigh zero. */
2294
2295 ALL_OBJFILE_PSYMTABS (objfile, p1)
2296 {
2297 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2298 {
2299 p1->texthigh = pst->textlow;
2300 /* if this file has only data, then make textlow match texthigh */
2301 if (p1->textlow == 0)
2302 p1->textlow = p1->texthigh;
2303 }
2304 }
2305 }
2306
2307 /* End of kludge for patching Solaris textlow and texthigh. */
2308
2309 pst->n_global_syms =
2310 objfile->global_psymbols.next - (objfile->global_psymbols.list
2311 + pst->globals_offset);
2312 pst->n_static_syms =
2313 objfile->static_psymbols.next - (objfile->static_psymbols.list
2314 + pst->statics_offset);
2315
2316 pst->number_of_dependencies = number_dependencies;
2317 if (number_dependencies)
2318 {
2319 pst->dependencies = (struct partial_symtab **)
2320 obstack_alloc (&objfile->objfile_obstack,
2321 number_dependencies * sizeof (struct partial_symtab *));
2322 memcpy (pst->dependencies, dependency_list,
2323 number_dependencies * sizeof (struct partial_symtab *));
2324 }
2325 else
2326 pst->dependencies = 0;
2327
2328 for (i = 0; i < num_includes; i++)
2329 {
2330 struct partial_symtab *subpst =
2331 allocate_psymtab (include_list[i], objfile);
2332
2333 /* Copy the sesction_offsets array from the main psymtab. */
2334 subpst->section_offsets = pst->section_offsets;
2335 subpst->read_symtab_private =
2336 (char *) obstack_alloc (&objfile->objfile_obstack,
2337 sizeof (struct symloc));
2338 LDSYMOFF (subpst) =
2339 LDSYMLEN (subpst) =
2340 subpst->textlow =
2341 subpst->texthigh = 0;
2342
2343 /* We could save slight bits of space by only making one of these,
2344 shared by the entire set of include files. FIXME-someday. */
2345 subpst->dependencies = (struct partial_symtab **)
2346 obstack_alloc (&objfile->objfile_obstack,
2347 sizeof (struct partial_symtab *));
2348 subpst->dependencies[0] = pst;
2349 subpst->number_of_dependencies = 1;
2350
2351 subpst->globals_offset =
2352 subpst->n_global_syms =
2353 subpst->statics_offset =
2354 subpst->n_static_syms = 0;
2355
2356 subpst->readin = 0;
2357 subpst->symtab = 0;
2358 subpst->read_symtab = pst->read_symtab;
2359 }
2360
2361 sort_pst_symbols (pst);
2362
2363 /* If there is already a psymtab or symtab for a file of this name, remove it.
2364 (If there is a symtab, more drastic things also happen.)
2365 This happens in VxWorks. */
2366 free_named_symtabs (pst->filename);
2367
2368 if (num_includes == 0
2369 && number_dependencies == 0
2370 && pst->n_global_syms == 0
2371 && pst->n_static_syms == 0
2372 && has_line_numbers == 0)
2373 {
2374 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2375 it is on the obstack, but we can forget to chain it on the list. */
2376 /* Empty psymtabs happen as a result of header files which don't have
2377 any symbols in them. There can be a lot of them. But this check
2378 is wrong, in that a psymtab with N_SLINE entries but nothing else
2379 is not empty, but we don't realize that. Fixing that without slowing
2380 things down might be tricky. */
2381
2382 discard_psymtab (pst);
2383
2384 /* Indicate that psymtab was thrown away. */
2385 pst = (struct partial_symtab *) NULL;
2386 }
2387 return pst;
2388 }
2389 \f
2390 static void
2391 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
2392 {
2393 struct cleanup *old_chain;
2394 int i;
2395
2396 if (!pst)
2397 return;
2398
2399 if (pst->readin)
2400 {
2401 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. \
2402 Shouldn't happen.\n",
2403 pst->filename);
2404 return;
2405 }
2406
2407 /* Read in all partial symtabs on which this one is dependent */
2408 for (i = 0; i < pst->number_of_dependencies; i++)
2409 if (!pst->dependencies[i]->readin)
2410 {
2411 /* Inform about additional files that need to be read in. */
2412 if (info_verbose)
2413 {
2414 fputs_filtered (" ", gdb_stdout);
2415 wrap_here ("");
2416 fputs_filtered ("and ", gdb_stdout);
2417 wrap_here ("");
2418 printf_filtered ("%s...", pst->dependencies[i]->filename);
2419 wrap_here (""); /* Flush output */
2420 gdb_flush (gdb_stdout);
2421 }
2422 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
2423 }
2424
2425 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
2426 {
2427 /* Init stuff necessary for reading in symbols */
2428 stabsread_init ();
2429 buildsym_init ();
2430 old_chain = make_cleanup (really_free_pendings, 0);
2431 file_string_table_offset = FILE_STRING_OFFSET (pst);
2432 symbol_size = SYMBOL_SIZE (pst);
2433
2434 /* Read in this file's symbols */
2435 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2436 read_ofile_symtab (pst);
2437
2438 do_cleanups (old_chain);
2439 }
2440
2441 pst->readin = 1;
2442 }
2443
2444 /* Read in all of the symbols for a given psymtab for real.
2445 Be verbose about it if the user wants that. */
2446
2447 static void
2448 dbx_psymtab_to_symtab (struct partial_symtab *pst)
2449 {
2450 bfd *sym_bfd;
2451 struct cleanup *back_to = NULL;
2452
2453 if (!pst)
2454 return;
2455
2456 if (pst->readin)
2457 {
2458 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. \
2459 Shouldn't happen.\n",
2460 pst->filename);
2461 return;
2462 }
2463
2464 if (LDSYMLEN (pst) || pst->number_of_dependencies)
2465 {
2466 /* Print the message now, before reading the string table,
2467 to avoid disconcerting pauses. */
2468 if (info_verbose)
2469 {
2470 printf_filtered ("Reading in symbols for %s...", pst->filename);
2471 gdb_flush (gdb_stdout);
2472 }
2473
2474 sym_bfd = pst->objfile->obfd;
2475
2476 next_symbol_text_func = dbx_next_symbol_text;
2477
2478 if (DBX_STAB_SECTION (pst->objfile))
2479 {
2480 stabs_data
2481 = symfile_relocate_debug_section (pst->objfile->obfd,
2482 DBX_STAB_SECTION (pst->objfile),
2483 NULL);
2484 if (stabs_data)
2485 back_to = make_cleanup (free_current_contents,
2486 (void *) &stabs_data);
2487 }
2488
2489 dbx_psymtab_to_symtab_1 (pst);
2490
2491 if (back_to)
2492 do_cleanups (back_to);
2493
2494 /* Match with global symbols. This only needs to be done once,
2495 after all of the symtabs and dependencies have been read in. */
2496 scan_file_globals (pst->objfile);
2497
2498 /* Finish up the debug error message. */
2499 if (info_verbose)
2500 printf_filtered ("done.\n");
2501 }
2502 }
2503
2504 /* Read in a defined section of a specific object file's symbols. */
2505
2506 static void
2507 read_ofile_symtab (struct partial_symtab *pst)
2508 {
2509 char *namestring;
2510 struct external_nlist *bufp;
2511 struct internal_nlist nlist;
2512 unsigned char type;
2513 unsigned max_symnum;
2514 bfd *abfd;
2515 struct objfile *objfile;
2516 int sym_offset; /* Offset to start of symbols to read */
2517 int sym_size; /* Size of symbols to read */
2518 CORE_ADDR text_offset; /* Start of text segment for symbols */
2519 int text_size; /* Size of text segment for symbols */
2520 struct section_offsets *section_offsets;
2521
2522 objfile = pst->objfile;
2523 sym_offset = LDSYMOFF (pst);
2524 sym_size = LDSYMLEN (pst);
2525 text_offset = pst->textlow;
2526 text_size = pst->texthigh - pst->textlow;
2527 /* This cannot be simply objfile->section_offsets because of
2528 elfstab_offset_sections() which initializes the psymtab section
2529 offsets information in a special way, and that is different from
2530 objfile->section_offsets. */
2531 section_offsets = pst->section_offsets;
2532
2533 current_objfile = objfile;
2534 subfile_stack = NULL;
2535
2536 stringtab_global = DBX_STRINGTAB (objfile);
2537 last_source_file = NULL;
2538
2539 abfd = objfile->obfd;
2540 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
2541 symbuf_end = symbuf_idx = 0;
2542 symbuf_read = 0;
2543 symbuf_left = sym_offset + sym_size;
2544
2545 /* It is necessary to actually read one symbol *before* the start
2546 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2547 occurs before the N_SO symbol.
2548
2549 Detecting this in read_dbx_symtab
2550 would slow down initial readin, so we look for it here instead. */
2551 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2552 {
2553 stabs_seek (sym_offset - symbol_size);
2554 fill_symbuf (abfd);
2555 bufp = &symbuf[symbuf_idx++];
2556 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2557 OBJSTAT (objfile, n_stabs++);
2558
2559 namestring = set_namestring (objfile, &nlist);
2560
2561 processing_gcc_compilation = 0;
2562 if (nlist.n_type == N_TEXT)
2563 {
2564 const char *tempstring = namestring;
2565
2566 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2567 processing_gcc_compilation = 1;
2568 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2569 processing_gcc_compilation = 2;
2570 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2571 ++tempstring;
2572 if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
2573 processing_gcc_compilation = 2;
2574 }
2575
2576 /* Try to select a C++ demangling based on the compilation unit
2577 producer. */
2578
2579 #if 0
2580 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2581 know whether it will use the old style or v3 mangling. */
2582 if (processing_gcc_compilation)
2583 {
2584 if (AUTO_DEMANGLING)
2585 {
2586 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2587 }
2588 }
2589 #endif
2590 }
2591 else
2592 {
2593 /* The N_SO starting this symtab is the first symbol, so we
2594 better not check the symbol before it. I'm not this can
2595 happen, but it doesn't hurt to check for it. */
2596 stabs_seek (sym_offset);
2597 processing_gcc_compilation = 0;
2598 }
2599
2600 if (symbuf_idx == symbuf_end)
2601 fill_symbuf (abfd);
2602 bufp = &symbuf[symbuf_idx];
2603 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2604 error (_("First symbol in segment of executable not a source symbol"));
2605
2606 max_symnum = sym_size / symbol_size;
2607
2608 for (symnum = 0;
2609 symnum < max_symnum;
2610 symnum++)
2611 {
2612 QUIT; /* Allow this to be interruptable */
2613 if (symbuf_idx == symbuf_end)
2614 fill_symbuf (abfd);
2615 bufp = &symbuf[symbuf_idx++];
2616 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2617 OBJSTAT (objfile, n_stabs++);
2618
2619 type = bfd_h_get_8 (abfd, bufp->e_type);
2620
2621 namestring = set_namestring (objfile, &nlist);
2622
2623 if (type & N_STAB)
2624 {
2625 if (sizeof (nlist.n_value) > 4
2626 /* We are a 64-bit debugger debugging a 32-bit program. */
2627 && (type == N_LSYM || type == N_PSYM))
2628 /* We have to be careful with the n_value in the case of N_LSYM
2629 and N_PSYM entries, because they are signed offsets from frame
2630 pointer, but we actually read them as unsigned 32-bit values.
2631 This is not a problem for 32-bit debuggers, for which negative
2632 values end up being interpreted correctly (as negative
2633 offsets) due to integer overflow.
2634 But we need to sign-extend the value for 64-bit debuggers,
2635 or we'll end up interpreting negative values as very large
2636 positive offsets. */
2637 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2638 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2639 namestring, section_offsets, objfile);
2640 }
2641 /* We skip checking for a new .o or -l file; that should never
2642 happen in this routine. */
2643 else if (type == N_TEXT)
2644 {
2645 /* I don't think this code will ever be executed, because
2646 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2647 the N_SO symbol which starts this source file.
2648 However, there is no reason not to accept
2649 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2650
2651 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2652 processing_gcc_compilation = 1;
2653 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2654 processing_gcc_compilation = 2;
2655
2656 #if 0
2657 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2658 know whether it will use the old style or v3 mangling. */
2659 if (AUTO_DEMANGLING)
2660 {
2661 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2662 }
2663 #endif
2664 }
2665 else if (type & N_EXT || type == (unsigned char) N_TEXT
2666 || type == (unsigned char) N_NBTEXT
2667 )
2668 {
2669 /* Global symbol: see if we came across a dbx defintion for
2670 a corresponding symbol. If so, store the value. Remove
2671 syms from the chain when their values are stored, but
2672 search the whole chain, as there may be several syms from
2673 different files with the same name. */
2674 /* This is probably not true. Since the files will be read
2675 in one at a time, each reference to a global symbol will
2676 be satisfied in each file as it appears. So we skip this
2677 section. */
2678 ;
2679 }
2680 }
2681
2682 /* In a Solaris elf file, this variable, which comes from the
2683 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2684 which comes from pst->textlow is correct. */
2685 if (last_source_start_addr == 0)
2686 last_source_start_addr = text_offset;
2687
2688 /* In reordered executables last_source_start_addr may not be the
2689 lower bound for this symtab, instead use text_offset which comes
2690 from pst->textlow which is correct. */
2691 if (last_source_start_addr > text_offset)
2692 last_source_start_addr = text_offset;
2693
2694 pst->symtab = end_symtab (text_offset + text_size, objfile,
2695 SECT_OFF_TEXT (objfile));
2696
2697 end_stabs ();
2698
2699 current_objfile = NULL;
2700 }
2701 \f
2702
2703 /* This handles a single symbol from the symbol-file, building symbols
2704 into a GDB symtab. It takes these arguments and an implicit argument.
2705
2706 TYPE is the type field of the ".stab" symbol entry.
2707 DESC is the desc field of the ".stab" entry.
2708 VALU is the value field of the ".stab" entry.
2709 NAME is the symbol name, in our address space.
2710 SECTION_OFFSETS is a set of amounts by which the sections of this
2711 object file were relocated when it was loaded into memory. Note
2712 that these section_offsets are not the objfile->section_offsets but
2713 the pst->section_offsets. All symbols that refer to memory
2714 locations need to be offset by these amounts.
2715 OBJFILE is the object file from which we are reading symbols. It
2716 is used in end_symtab. */
2717
2718 void
2719 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2720 struct section_offsets *section_offsets,
2721 struct objfile *objfile)
2722 {
2723 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2724 struct context_stack *new;
2725 /* This remembers the address of the start of a function. It is
2726 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2727 are relative to the current function's start address. On systems
2728 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2729 and is used to relocate these symbol types rather than
2730 SECTION_OFFSETS. */
2731 static CORE_ADDR function_start_offset;
2732
2733 /* This holds the address of the start of a function, without the
2734 system peculiarities of function_start_offset. */
2735 static CORE_ADDR last_function_start;
2736
2737 /* If this is nonzero, we've seen an N_SLINE since the start of the
2738 current function. We use this to tell us to move the first sline
2739 to the beginning of the function regardless of what its given
2740 value is. */
2741 static int sline_found_in_function = 1;
2742
2743 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2744 source file. Used to detect the SunPRO solaris compiler. */
2745 static int n_opt_found;
2746
2747 /* The stab type used for the definition of the last function.
2748 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2749 static int function_stab_type = 0;
2750
2751 if (!block_address_function_relative)
2752 {
2753 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2754 function start address, so just use the text offset. */
2755 function_start_offset =
2756 ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2757 }
2758
2759 /* Something is wrong if we see real data before seeing a source
2760 file name. */
2761
2762 if (last_source_file == NULL && type != (unsigned char) N_SO)
2763 {
2764 /* Ignore any symbols which appear before an N_SO symbol.
2765 Currently no one puts symbols there, but we should deal
2766 gracefully with the case. A complain()t might be in order,
2767 but this should not be an error (). */
2768 return;
2769 }
2770
2771 switch (type)
2772 {
2773 case N_FUN:
2774 case N_FNAME:
2775
2776 if (*name == '\000')
2777 {
2778 /* This N_FUN marks the end of a function. This closes off
2779 the current block. */
2780 struct block *block;
2781
2782 if (context_stack_depth <= 0)
2783 {
2784 lbrac_mismatch_complaint (symnum);
2785 break;
2786 }
2787
2788 /* The following check is added before recording line 0 at
2789 end of function so as to handle hand-generated stabs
2790 which may have an N_FUN stabs at the end of the function,
2791 but no N_SLINE stabs. */
2792 if (sline_found_in_function)
2793 record_line (current_subfile, 0, last_function_start + valu);
2794
2795 within_function = 0;
2796 new = pop_context ();
2797
2798 /* Make a block for the local symbols within. */
2799 block = finish_block (new->name, &local_symbols, new->old_blocks,
2800 new->start_addr, new->start_addr + valu,
2801 objfile);
2802
2803 /* For C++, set the block's scope. */
2804 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
2805 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
2806 "", 0);
2807
2808 /* May be switching to an assembler file which may not be using
2809 block relative stabs, so reset the offset. */
2810 if (block_address_function_relative)
2811 function_start_offset = 0;
2812
2813 break;
2814 }
2815
2816 sline_found_in_function = 0;
2817
2818 /* Relocate for dynamic loading. */
2819 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2820 valu = gdbarch_smash_text_address (gdbarch, valu);
2821 last_function_start = valu;
2822
2823 goto define_a_symbol;
2824
2825 case N_LBRAC:
2826 /* This "symbol" just indicates the start of an inner lexical
2827 context within a function. */
2828
2829 /* Ignore extra outermost context from SunPRO cc and acc. */
2830 if (n_opt_found && desc == 1)
2831 break;
2832
2833 if (block_address_function_relative)
2834 /* Relocate for Sun ELF acc fn-relative syms. */
2835 valu += function_start_offset;
2836 else
2837 /* On most machines, the block addresses are relative to the
2838 N_SO, the linker did not relocate them (sigh). */
2839 valu += last_source_start_addr;
2840
2841 new = push_context (desc, valu);
2842 break;
2843
2844 case N_RBRAC:
2845 /* This "symbol" just indicates the end of an inner lexical
2846 context that was started with N_LBRAC. */
2847
2848 /* Ignore extra outermost context from SunPRO cc and acc. */
2849 if (n_opt_found && desc == 1)
2850 break;
2851
2852 if (block_address_function_relative)
2853 /* Relocate for Sun ELF acc fn-relative syms. */
2854 valu += function_start_offset;
2855 else
2856 /* On most machines, the block addresses are relative to the
2857 N_SO, the linker did not relocate them (sigh). */
2858 valu += last_source_start_addr;
2859
2860 if (context_stack_depth <= 0)
2861 {
2862 lbrac_mismatch_complaint (symnum);
2863 break;
2864 }
2865
2866 new = pop_context ();
2867 if (desc != new->depth)
2868 lbrac_mismatch_complaint (symnum);
2869
2870 if (local_symbols != NULL)
2871 {
2872 /* GCC development snapshots from March to December of
2873 2000 would output N_LSYM entries after N_LBRAC
2874 entries. As a consequence, these symbols are simply
2875 discarded. Complain if this is the case. */
2876 complaint (&symfile_complaints, _("\
2877 misplaced N_LBRAC entry; discarding local symbols which have \
2878 no enclosing block"));
2879 }
2880 local_symbols = new->locals;
2881
2882 if (context_stack_depth > 1)
2883 {
2884 /* This is not the outermost LBRAC...RBRAC pair in the
2885 function, its local symbols preceded it, and are the ones
2886 just recovered from the context stack. Define the block
2887 for them (but don't bother if the block contains no
2888 symbols. Should we complain on blocks without symbols?
2889 I can't think of any useful purpose for them). */
2890 if (local_symbols != NULL)
2891 {
2892 /* Muzzle a compiler bug that makes end < start.
2893
2894 ??? Which compilers? Is this ever harmful?. */
2895 if (new->start_addr > valu)
2896 {
2897 complaint (&symfile_complaints,
2898 _("block start larger than block end"));
2899 new->start_addr = valu;
2900 }
2901 /* Make a block for the local symbols within. */
2902 finish_block (0, &local_symbols, new->old_blocks,
2903 new->start_addr, valu, objfile);
2904 }
2905 }
2906 else
2907 {
2908 /* This is the outermost LBRAC...RBRAC pair. There is no
2909 need to do anything; leave the symbols that preceded it
2910 to be attached to the function's own block. We need to
2911 indicate that we just moved outside of the function. */
2912 within_function = 0;
2913 }
2914
2915 break;
2916
2917 case N_FN:
2918 case N_FN_SEQ:
2919 /* This kind of symbol indicates the start of an object file.
2920 Relocate for dynamic loading. */
2921 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2922 break;
2923
2924 case N_SO:
2925 /* This type of symbol indicates the start of data for one
2926 source file. Finish the symbol table of the previous source
2927 file (if any) and start accumulating a new symbol table.
2928 Relocate for dynamic loading. */
2929 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2930
2931 n_opt_found = 0;
2932
2933 if (last_source_file)
2934 {
2935 /* Check if previous symbol was also an N_SO (with some
2936 sanity checks). If so, that one was actually the
2937 directory name, and the current one is the real file
2938 name. Patch things up. */
2939 if (previous_stab_code == (unsigned char) N_SO)
2940 {
2941 patch_subfile_names (current_subfile, name);
2942 break; /* Ignore repeated SOs */
2943 }
2944 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2945 end_stabs ();
2946 }
2947
2948 /* Null name means this just marks the end of text for this .o
2949 file. Don't start a new symtab in this case. */
2950 if (*name == '\000')
2951 break;
2952
2953 if (block_address_function_relative)
2954 function_start_offset = 0;
2955
2956 start_stabs ();
2957 start_symtab (name, NULL, valu);
2958 record_debugformat ("stabs");
2959 break;
2960
2961 case N_SOL:
2962 /* This type of symbol indicates the start of data for a
2963 sub-source-file, one whose contents were copied or included
2964 in the compilation of the main source file (whose name was
2965 given in the N_SO symbol). Relocate for dynamic loading. */
2966 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2967 start_subfile (name, current_subfile->dirname);
2968 break;
2969
2970 case N_BINCL:
2971 push_subfile ();
2972 add_new_header_file (name, valu);
2973 start_subfile (name, current_subfile->dirname);
2974 break;
2975
2976 case N_EINCL:
2977 start_subfile (pop_subfile (), current_subfile->dirname);
2978 break;
2979
2980 case N_EXCL:
2981 add_old_header_file (name, valu);
2982 break;
2983
2984 case N_SLINE:
2985 /* This type of "symbol" really just records one line-number --
2986 core-address correspondence. Enter it in the line list for
2987 this symbol table. */
2988
2989 /* Relocate for dynamic loading and for ELF acc
2990 function-relative symbols. */
2991 valu += function_start_offset;
2992
2993 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2994 middle of the prologue instead of right at the start of the
2995 function. To deal with this we record the address for the
2996 first N_SLINE stab to be the start of the function instead of
2997 the listed location. We really shouldn't to this. When
2998 compiling with optimization, this first N_SLINE stab might be
2999 optimized away. Other (non-GCC) compilers don't emit this
3000 stab at all. There is no real harm in having an extra
3001 numbered line, although it can be a bit annoying for the
3002 user. However, it totally screws up our testsuite.
3003
3004 So for now, keep adjusting the address of the first N_SLINE
3005 stab, but only for code compiled with GCC. */
3006
3007 if (within_function && sline_found_in_function == 0)
3008 {
3009 if (processing_gcc_compilation == 2)
3010 record_line (current_subfile, desc, last_function_start);
3011 else
3012 record_line (current_subfile, desc, valu);
3013 sline_found_in_function = 1;
3014 }
3015 else
3016 record_line (current_subfile, desc, valu);
3017 break;
3018
3019 case N_BCOMM:
3020 common_block_start (name, objfile);
3021 break;
3022
3023 case N_ECOMM:
3024 common_block_end (objfile);
3025 break;
3026
3027 /* The following symbol types need to have the appropriate
3028 offset added to their value; then we process symbol
3029 definitions in the name. */
3030
3031 case N_STSYM: /* Static symbol in data segment. */
3032 case N_LCSYM: /* Static symbol in BSS segment. */
3033 case N_ROSYM: /* Static symbol in read-only data segment. */
3034 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3035 Solaris 2's stabs-in-elf makes *most* symbols relative but
3036 leaves a few absolute (at least for Solaris 2.1 and version
3037 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3038 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3039 relocates it) .stab "foo:V...",N_STSYM is relative (section
3040 base subtracted). This leaves us no choice but to search for
3041 the 'S' or 'V'... (or pass the whole section_offsets stuff
3042 down ONE MORE function call level, which we really don't want
3043 to do). */
3044 {
3045 char *p;
3046
3047 /* Normal object file and NLMs have non-zero text seg offsets,
3048 but don't need their static syms offset in this fashion.
3049 XXX - This is really a crock that should be fixed in the
3050 solib handling code so that I don't have to work around it
3051 here. */
3052
3053 if (!symfile_relocatable)
3054 {
3055 p = strchr (name, ':');
3056 if (p != 0 && p[1] == 'S')
3057 {
3058 /* The linker relocated it. We don't want to add an
3059 elfstab_offset_sections-type offset, but we *do*
3060 want to add whatever solib.c passed to
3061 symbol_file_add as addr (this is known to affect
3062 SunOS 4, and I suspect ELF too). Since
3063 elfstab_offset_sections currently does not muck
3064 with the text offset (there is no Ttext.text
3065 symbol), we can get addr from the text offset. If
3066 elfstab_offset_sections ever starts dealing with
3067 the text offset, and we still need to do this, we
3068 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3069 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3070 goto define_a_symbol;
3071 }
3072 }
3073 /* Since it's not the kludge case, re-dispatch to the right
3074 handler. */
3075 switch (type)
3076 {
3077 case N_STSYM:
3078 goto case_N_STSYM;
3079 case N_LCSYM:
3080 goto case_N_LCSYM;
3081 case N_ROSYM:
3082 goto case_N_ROSYM;
3083 default:
3084 internal_error (__FILE__, __LINE__,
3085 _("failed internal consistency check"));
3086 }
3087 }
3088
3089 case_N_STSYM: /* Static symbol in data segment. */
3090 case N_DSLINE: /* Source line number, data segment. */
3091 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3092 goto define_a_symbol;
3093
3094 case_N_LCSYM: /* Static symbol in BSS segment. */
3095 case N_BSLINE: /* Source line number, BSS segment. */
3096 /* N_BROWS: overlaps with N_BSLINE. */
3097 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3098 goto define_a_symbol;
3099
3100 case_N_ROSYM: /* Static symbol in read-only data segment. */
3101 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3102 goto define_a_symbol;
3103
3104 case N_ENTRY: /* Alternate entry point. */
3105 /* Relocate for dynamic loading. */
3106 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3107 goto define_a_symbol;
3108
3109 /* The following symbol types we don't know how to process.
3110 Handle them in a "default" way, but complain to people who
3111 care. */
3112 default:
3113 case N_CATCH: /* Exception handler catcher. */
3114 case N_EHDECL: /* Exception handler name. */
3115 case N_PC: /* Global symbol in Pascal. */
3116 case N_M2C: /* Modula-2 compilation unit. */
3117 /* N_MOD2: overlaps with N_EHDECL. */
3118 case N_SCOPE: /* Modula-2 scope information. */
3119 case N_ECOML: /* End common (local name). */
3120 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3121 case N_NBDATA:
3122 case N_NBBSS:
3123 case N_NBSTS:
3124 case N_NBLCS:
3125 unknown_symtype_complaint (hex_string (type));
3126 /* FALLTHROUGH */
3127
3128 /* The following symbol types don't need the address field
3129 relocated, since it is either unused, or is absolute. */
3130 define_a_symbol:
3131 case N_GSYM: /* Global variable. */
3132 case N_NSYMS: /* Number of symbols (Ultrix). */
3133 case N_NOMAP: /* No map? (Ultrix). */
3134 case N_RSYM: /* Register variable. */
3135 case N_DEFD: /* Modula-2 GNU module dependency. */
3136 case N_SSYM: /* Struct or union element. */
3137 case N_LSYM: /* Local symbol in stack. */
3138 case N_PSYM: /* Parameter variable. */
3139 case N_LENG: /* Length of preceding symbol type. */
3140 if (name)
3141 {
3142 int deftype;
3143 char *colon_pos = strchr (name, ':');
3144 if (colon_pos == NULL)
3145 deftype = '\0';
3146 else
3147 deftype = colon_pos[1];
3148
3149 switch (deftype)
3150 {
3151 case 'f':
3152 case 'F':
3153 function_stab_type = type;
3154
3155 /* Deal with the SunPRO 3.0 compiler which omits the
3156 address from N_FUN symbols. */
3157 if (type == N_FUN
3158 && valu == ANOFFSET (section_offsets,
3159 SECT_OFF_TEXT (objfile))
3160 && gdbarch_sofun_address_maybe_missing (gdbarch))
3161 {
3162 CORE_ADDR minsym_valu =
3163 find_stab_function_addr (name, last_source_file, objfile);
3164
3165 /* The function find_stab_function_addr will return
3166 0 if the minimal symbol wasn't found.
3167 (Unfortunately, this might also be a valid
3168 address.) Anyway, if it *does* return 0, it is
3169 likely that the value was set correctly to begin
3170 with... */
3171 if (minsym_valu != 0)
3172 valu = minsym_valu;
3173 }
3174
3175 if (block_address_function_relative)
3176 /* For Solaris 2 compilers, the block addresses and
3177 N_SLINE's are relative to the start of the
3178 function. On normal systems, and when using GCC on
3179 Solaris 2, these addresses are just absolute, or
3180 relative to the N_SO, depending on
3181 BLOCK_ADDRESS_ABSOLUTE. */
3182 function_start_offset = valu;
3183
3184 within_function = 1;
3185
3186 if (context_stack_depth > 1)
3187 {
3188 complaint (&symfile_complaints,
3189 _("unmatched N_LBRAC before symtab pos %d"),
3190 symnum);
3191 break;
3192 }
3193
3194 if (context_stack_depth > 0)
3195 {
3196 struct block *block;
3197
3198 new = pop_context ();
3199 /* Make a block for the local symbols within. */
3200 block = finish_block (new->name, &local_symbols,
3201 new->old_blocks, new->start_addr,
3202 valu, objfile);
3203
3204 /* For C++, set the block's scope. */
3205 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
3206 cp_set_block_scope (new->name, block,
3207 &objfile->objfile_obstack,
3208 "", 0);
3209 }
3210
3211 new = push_context (0, valu);
3212 new->name = define_symbol (valu, name, desc, type, objfile);
3213 break;
3214
3215 default:
3216 define_symbol (valu, name, desc, type, objfile);
3217 break;
3218 }
3219 }
3220 break;
3221
3222 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3223 for a bunch of other flags, too. Someday we may parse their
3224 flags; for now we ignore theirs and hope they'll ignore ours. */
3225 case N_OPT: /* Solaris 2: Compiler options. */
3226 if (name)
3227 {
3228 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3229 {
3230 processing_gcc_compilation = 2;
3231 #if 0 /* Works, but is experimental. -fnf */
3232 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3233 we don't know whether it will use the old style or v3
3234 mangling. */
3235 if (AUTO_DEMANGLING)
3236 {
3237 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3238 }
3239 #endif
3240 }
3241 else
3242 n_opt_found = 1;
3243 }
3244 break;
3245
3246 case N_MAIN: /* Name of main routine. */
3247 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3248 it with a symbol file with "main" and without N_MAIN. I'm
3249 not sure exactly what rule to follow but probably something
3250 like: N_MAIN takes precedence over "main" no matter what
3251 objfile it is in; If there is more than one N_MAIN, choose
3252 the one in the symfile_objfile; If there is more than one
3253 N_MAIN within a given objfile, complain() and choose
3254 arbitrarily. (kingdon) */
3255 if (name != NULL)
3256 set_main_name (name);
3257 break;
3258
3259 /* The following symbol types can be ignored. */
3260 case N_OBJ: /* Solaris 2: Object file dir and name. */
3261 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
3262 /* N_UNDF: Solaris 2: File separator mark. */
3263 /* N_UNDF: -- we will never encounter it, since we only process
3264 one file's symbols at once. */
3265 case N_ENDM: /* Solaris 2: End of module. */
3266 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3267 break;
3268 }
3269
3270 /* '#' is a GNU C extension to allow one symbol to refer to another
3271 related symbol.
3272
3273 Generally this is used so that an alias can refer to its main
3274 symbol. */
3275 if (name[0] == '#')
3276 {
3277 /* Initialize symbol reference names and determine if this is a
3278 definition. If a symbol reference is being defined, go ahead
3279 and add it. Otherwise, just return. */
3280
3281 char *s = name;
3282 int refnum;
3283
3284 /* If this stab defines a new reference ID that is not on the
3285 reference list, then put it on the reference list.
3286
3287 We go ahead and advance NAME past the reference, even though
3288 it is not strictly necessary at this time. */
3289 refnum = symbol_reference_defined (&s);
3290 if (refnum >= 0)
3291 if (!ref_search (refnum))
3292 ref_add (refnum, 0, name, valu);
3293 name = s;
3294 }
3295
3296 previous_stab_code = type;
3297 }
3298 \f
3299 /* FIXME: The only difference between this and elfstab_build_psymtabs
3300 is the call to install_minimal_symbols for elf, and the support for
3301 split sections. If the differences are really that small, the code
3302 should be shared. */
3303
3304 /* Scan and build partial symbols for an coff symbol file.
3305 The coff file has already been processed to get its minimal symbols.
3306
3307 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3308 rolled into one.
3309
3310 OBJFILE is the object file we are reading symbols from.
3311 ADDR is the address relative to which the symbols are (e.g.
3312 the base address of the text segment).
3313 MAINLINE is true if we are reading the main symbol
3314 table (as opposed to a shared lib or dynamically loaded file).
3315 TEXTADDR is the address of the text section.
3316 TEXTSIZE is the size of the text section.
3317 STABSECTS is the list of .stab sections in OBJFILE.
3318 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3319 .stabstr section exists.
3320
3321 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3322 adjusted for coff details. */
3323
3324 void
3325 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
3326 CORE_ADDR textaddr, unsigned int textsize,
3327 struct stab_section_list *stabsects,
3328 file_ptr stabstroffset, unsigned int stabstrsize)
3329 {
3330 int val;
3331 bfd *sym_bfd = objfile->obfd;
3332 char *name = bfd_get_filename (sym_bfd);
3333 struct dbx_symfile_info *info;
3334 unsigned int stabsize;
3335
3336 /* There is already a dbx_symfile_info allocated by our caller.
3337 It might even contain some info from the coff symtab to help us. */
3338 info = objfile->deprecated_sym_stab_info;
3339
3340 DBX_TEXT_ADDR (objfile) = textaddr;
3341 DBX_TEXT_SIZE (objfile) = textsize;
3342
3343 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3344 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3345 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3346
3347 if (stabstrsize > bfd_get_size (sym_bfd))
3348 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3349 DBX_STRINGTAB (objfile) = (char *)
3350 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3351 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3352
3353 /* Now read in the string table in one big gulp. */
3354
3355 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3356 if (val < 0)
3357 perror_with_name (name);
3358 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3359 if (val != stabstrsize)
3360 perror_with_name (name);
3361
3362 stabsread_new_init ();
3363 buildsym_new_init ();
3364 free_header_files ();
3365 init_header_files ();
3366
3367 processing_acc_compilation = 1;
3368
3369 /* In a coff file, we've already installed the minimal symbols that came
3370 from the coff (non-stab) symbol table, so always act like an
3371 incremental load here. */
3372 if (stabsects->next == NULL)
3373 {
3374 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3375 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3376 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3377 }
3378 else
3379 {
3380 struct stab_section_list *stabsect;
3381
3382 DBX_SYMCOUNT (objfile) = 0;
3383 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3384 {
3385 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3386 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3387 }
3388
3389 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3390
3391 symbuf_sections = stabsects->next;
3392 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3393 symbuf_read = 0;
3394 }
3395
3396 dbx_symfile_read (objfile, 0);
3397 }
3398 \f
3399 /* Scan and build partial symbols for an ELF symbol file.
3400 This ELF file has already been processed to get its minimal symbols.
3401
3402 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3403 rolled into one.
3404
3405 OBJFILE is the object file we are reading symbols from.
3406 ADDR is the address relative to which the symbols are (e.g.
3407 the base address of the text segment).
3408 MAINLINE is true if we are reading the main symbol
3409 table (as opposed to a shared lib or dynamically loaded file).
3410 STABSECT is the BFD section information for the .stab section.
3411 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3412 .stabstr section exists.
3413
3414 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3415 adjusted for elf details. */
3416
3417 void
3418 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
3419 asection *stabsect,
3420 file_ptr stabstroffset, unsigned int stabstrsize)
3421 {
3422 int val;
3423 bfd *sym_bfd = objfile->obfd;
3424 char *name = bfd_get_filename (sym_bfd);
3425 struct dbx_symfile_info *info;
3426 struct cleanup *back_to = NULL;
3427
3428 /* There is already a dbx_symfile_info allocated by our caller.
3429 It might even contain some info from the ELF symtab to help us. */
3430 info = objfile->deprecated_sym_stab_info;
3431
3432 /* Find the first and last text address. dbx_symfile_read seems to
3433 want this. */
3434 find_text_range (sym_bfd, objfile);
3435
3436 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3437 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3438 DBX_SYMCOUNT (objfile)
3439 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3440 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3441 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3442 DBX_STAB_SECTION (objfile) = stabsect;
3443
3444 if (stabstrsize > bfd_get_size (sym_bfd))
3445 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3446 DBX_STRINGTAB (objfile) = (char *)
3447 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3448 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3449
3450 /* Now read in the string table in one big gulp. */
3451
3452 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3453 if (val < 0)
3454 perror_with_name (name);
3455 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3456 if (val != stabstrsize)
3457 perror_with_name (name);
3458
3459 stabsread_new_init ();
3460 buildsym_new_init ();
3461 free_header_files ();
3462 init_header_files ();
3463
3464 processing_acc_compilation = 1;
3465
3466 symbuf_read = 0;
3467 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3468 stabs_data = symfile_relocate_debug_section (objfile->obfd, stabsect, NULL);
3469 if (stabs_data)
3470 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
3471
3472 /* In an elf file, we've already installed the minimal symbols that came
3473 from the elf (non-stab) symbol table, so always act like an
3474 incremental load here. dbx_symfile_read should not generate any new
3475 minimal symbols, since we will have already read the ELF dynamic symbol
3476 table and normal symbol entries won't be in the ".stab" section; but in
3477 case it does, it will install them itself. */
3478 dbx_symfile_read (objfile, 0);
3479
3480 if (back_to)
3481 do_cleanups (back_to);
3482 }
3483 \f
3484 /* Scan and build partial symbols for a file with special sections for stabs
3485 and stabstrings. The file has already been processed to get its minimal
3486 symbols, and any other symbols that might be necessary to resolve GSYMs.
3487
3488 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3489 rolled into one.
3490
3491 OBJFILE is the object file we are reading symbols from.
3492 ADDR is the address relative to which the symbols are (e.g. the base address
3493 of the text segment).
3494 MAINLINE is true if we are reading the main symbol table (as opposed to a
3495 shared lib or dynamically loaded file).
3496 STAB_NAME is the name of the section that contains the stabs.
3497 STABSTR_NAME is the name of the section that contains the stab strings.
3498
3499 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3500
3501 void
3502 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
3503 char *stabstr_name, char *text_name)
3504 {
3505 int val;
3506 bfd *sym_bfd = objfile->obfd;
3507 char *name = bfd_get_filename (sym_bfd);
3508 asection *stabsect;
3509 asection *stabstrsect;
3510 asection *text_sect;
3511
3512 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3513 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3514
3515 if (!stabsect)
3516 return;
3517
3518 if (!stabstrsect)
3519 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string \
3520 section (%s)"),
3521 stab_name, stabstr_name);
3522
3523 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
3524 xmalloc (sizeof (struct dbx_symfile_info));
3525 memset (objfile->deprecated_sym_stab_info, 0,
3526 sizeof (struct dbx_symfile_info));
3527
3528 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3529 if (!text_sect)
3530 error (_("Can't find %s section in symbol file"), text_name);
3531 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3532 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3533
3534 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3535 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3536 / DBX_SYMBOL_SIZE (objfile);
3537 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3538 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3539
3540 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3541 error (_("ridiculous string table size: %d bytes"),
3542 DBX_STRINGTAB_SIZE (objfile));
3543 DBX_STRINGTAB (objfile) = (char *)
3544 obstack_alloc (&objfile->objfile_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
3545 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3546
3547 /* Now read in the string table in one big gulp. */
3548
3549 val = bfd_get_section_contents (sym_bfd, /* bfd */
3550 stabstrsect, /* bfd section */
3551 DBX_STRINGTAB (objfile), /* input buffer */
3552 0, /* offset into section */
3553 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
3554
3555 if (!val)
3556 perror_with_name (name);
3557
3558 stabsread_new_init ();
3559 buildsym_new_init ();
3560 free_header_files ();
3561 init_header_files ();
3562
3563 /* Now, do an incremental load */
3564
3565 processing_acc_compilation = 1;
3566 dbx_symfile_read (objfile, 0);
3567 }
3568 \f
3569 static struct sym_fns aout_sym_fns =
3570 {
3571 bfd_target_aout_flavour,
3572 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
3573 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3574 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
3575 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
3576 default_symfile_offsets, /* sym_offsets: parse user's offsets to
3577 internal form */
3578 default_symfile_segments, /* sym_segments: Get segment information from
3579 a file. */
3580 NULL, /* sym_read_linetable */
3581 NULL /* next: pointer to next struct sym_fns */
3582 };
3583
3584 void
3585 _initialize_dbxread (void)
3586 {
3587 add_symtab_fns (&aout_sym_fns);
3588 }
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