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dbxread.c
Go to the documentation of this file.
1/* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2023 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19/* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
23 from a file.
24
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
32
33#include "defs.h"
34
35#include "gdbsupport/gdb_obstack.h"
36#include <sys/stat.h>
37#include "symtab.h"
38#include "breakpoint.h"
39#include "target.h"
40#include "gdbcore.h" /* for bfd stuff */
41#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
42#include "filenames.h"
43#include "objfiles.h"
44#include "buildsym-legacy.h"
45#include "stabsread.h"
46#include "gdb-stabs.h"
47#include "demangle.h"
48#include "complaints.h"
49#include "cp-abi.h"
50#include "cp-support.h"
51#include "c-lang.h"
52#include "psympriv.h"
53#include "block.h"
54#include "aout/aout64.h"
55#include "aout/stab_gnu.h" /* We always use GNU stabs, not
56 native, now. */
57
58
59/* Key for dbx-associated data. */
60
62
63/* We put a pointer to this structure in the read_symtab_private field
64 of the psymtab. */
65
66struct symloc
67 {
68 /* Offset within the file symbol table of first local symbol for this
69 file. */
70
72
73 /* Length (in bytes) of the section of the symbol table devoted to
74 this file's symbols (actually, the section bracketed may contain
75 more than just this file's symbols). If ldsymlen is 0, the only
76 reason for this thing's existence is the dependency list. Nothing
77 else will happen when it is read in. */
78
80
81 /* The size of each symbol in the symbol file (in external form). */
82
84
85 /* Further information needed to locate the symbols if they are in
86 an ELF file. */
87
92 };
93
94#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
95#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
96#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
97#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
98#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
99#define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
100#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
101#define PST_LANGUAGE(p) (SYMLOC(p)->pst_language)
102
103
104/* The objfile we are currently reading. */
105
107
108/* Remember what we deduced to be the source language of this psymtab. */
109
111
112/* The BFD for this file -- implicit parameter to next_symbol_text. */
113
114static bfd *symfile_bfd;
115
116/* The size of each symbol in the symbol file (in external form).
117 This is set by dbx_symfile_read when building psymtabs, and by
118 dbx_psymtab_to_symtab when building symtabs. */
119
120static unsigned symbol_size;
121
122/* This is the offset of the symbol table in the executable file. */
123
124static unsigned symbol_table_offset;
125
126/* This is the offset of the string table in the executable file. */
127
128static unsigned string_table_offset;
129
130/* For elf+stab executables, the n_strx field is not a simple index
131 into the string table. Instead, each .o file has a base offset in
132 the string table, and the associated symbols contain offsets from
133 this base. The following two variables contain the base offset for
134 the current and next .o files. */
135
136static unsigned int file_string_table_offset;
138
139/* .o and NLM files contain unrelocated addresses which are based at
140 0. When non-zero, this flag disables some of the special cases for
141 Solaris elf+stab text addresses at location 0. */
142
143static int symfile_relocatable = 0;
144
145/* When set, we are processing a .o file compiled by sun acc. This is
146 misnamed; it refers to all stabs-in-elf implementations which use
147 N_UNDF the way Sun does, including Solaris gcc. Hopefully all
148 stabs-in-elf implementations ever invented will choose to be
149 compatible. */
150
151static unsigned char processing_acc_compilation;
152
153
154/* The lowest text address we have yet encountered. This is needed
155 because in an a.out file, there is no header field which tells us
156 what address the program is actually going to be loaded at, so we
157 need to make guesses based on the symbols (which *are* relocated to
158 reflect the address it will be loaded at). */
159
160static CORE_ADDR lowest_text_address;
161
162/* Non-zero if there is any line number info in the objfile. Prevents
163 dbx_end_psymtab from discarding an otherwise empty psymtab. */
164
166
167/* Complaints about the symbols we have encountered. */
168
169static void
171{
172 complaint (_("unknown symbol type %s"), arg1);
173}
174
175static void
177{
178 complaint (_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
179}
180
181static void
182repeated_header_complaint (const char *arg1, int arg2)
183{
184 complaint (_("\"repeated\" header file %s not "
185 "previously seen, at symtab pos %d"),
186 arg1, arg2);
187}
188
189/* find_text_range --- find start and end of loadable code sections
190
191 The find_text_range function finds the shortest address range that
192 encloses all sections containing executable code, and stores it in
193 objfile's text_addr and text_size members.
194
195 dbx_symfile_read will use this to finish off the partial symbol
196 table, in some cases. */
197
198static void
199find_text_range (bfd * sym_bfd, struct objfile *objfile)
200{
201 asection *sec;
202 int found_any = 0;
203 CORE_ADDR start = 0;
204 CORE_ADDR end = 0;
205
206 for (sec = sym_bfd->sections; sec; sec = sec->next)
207 if (bfd_section_flags (sec) & SEC_CODE)
208 {
209 CORE_ADDR sec_start = bfd_section_vma (sec);
210 CORE_ADDR sec_end = sec_start + bfd_section_size (sec);
211
212 if (found_any)
213 {
214 if (sec_start < start)
215 start = sec_start;
216 if (sec_end > end)
217 end = sec_end;
218 }
219 else
220 {
221 start = sec_start;
222 end = sec_end;
223 }
224
225 found_any = 1;
226 }
227
228 if (!found_any)
229 error (_("Can't find any code sections in symbol file"));
230
231 DBX_TEXT_ADDR (objfile) = start;
232 DBX_TEXT_SIZE (objfile) = end - start;
233}
234
235
236
237/* During initial symbol readin, we need to have a structure to keep
238 track of which psymtabs have which bincls in them. This structure
239 is used during readin to setup the list of dependencies within each
240 partial symbol table. */
241
243{
244 header_file_location (const char *name_, int instance_,
245 legacy_psymtab *pst_)
246 : name (name_),
247 instance (instance_),
248 pst (pst_)
249 {
250 }
251
252 const char *name; /* Name of header file */
253 int instance; /* See above */
254 legacy_psymtab *pst; /* Partial symtab that has the
255 BINCL/EINCL defs for this file. */
256};
257
258/* The list of bincls. */
259static std::vector<struct header_file_location> *bincl_list;
260
261/* Local function prototypes. */
262
263static void read_ofile_symtab (struct objfile *, legacy_psymtab *);
264
265static void dbx_read_symtab (legacy_psymtab *self,
266 struct objfile *objfile);
267
268static void dbx_expand_psymtab (legacy_psymtab *, struct objfile *);
269
271 struct objfile *);
272
274 int);
275
276static const char *dbx_next_symbol_text (struct objfile *);
277
278static void fill_symbuf (bfd *);
279
280static void dbx_symfile_init (struct objfile *);
281
282static void dbx_new_init (struct objfile *);
283
284static void dbx_symfile_read (struct objfile *, symfile_add_flags);
285
286static void dbx_symfile_finish (struct objfile *);
287
289 const char *, CORE_ADDR, int,
290 struct objfile *);
291
292static void add_new_header_file (const char *, int);
293
294static void add_old_header_file (const char *, int);
295
296static void add_this_object_header_file (int);
297
299 const char *, CORE_ADDR, int);
300
301/* Free up old header file tables. */
302
303void
305{
307 {
310 }
312}
313
314/* Allocate new header file tables. */
315
316void
318{
320 this_object_header_files = XNEWVEC (int, 10);
321}
322
323/* Add header file number I for this object file
324 at the next successive FILENUM. */
325
326static void
328{
330 {
333 = (int *) xrealloc ((char *) this_object_header_files,
335 }
336
338}
339
340/* Add to this file an "old" header file, one already seen in
341 a previous object file. NAME is the header file's name.
342 INSTANCE is its instance code, to select among multiple
343 symbol tables for the same header file. */
344
345static void
346add_old_header_file (const char *name, int instance)
347{
349 int i;
350
351 for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++)
352 if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance)
353 {
355 return;
356 }
358}
359
360/* Add to this file a "new" header file: definitions for its types follow.
361 NAME is the header file's name.
362 Most often this happens only once for each distinct header file,
363 but not necessarily. If it happens more than once, INSTANCE has
364 a different value each time, and references to the header file
365 use INSTANCE values to select among them.
366
367 dbx output contains "begin" and "end" markers for each new header file,
368 but at this level we just need to know which files there have been;
369 so we record the file when its "begin" is seen and ignore the "end". */
370
371static void
373{
374 int i;
375 struct header_file *hfile;
376
377 /* Make sure there is room for one more header file. */
378
380
382 {
383 if (i == 0)
384 {
387 xmalloc (10 * sizeof (struct header_file));
388 }
389 else
390 {
391 i *= 2;
395 (i * sizeof (struct header_file)));
396 }
397 }
398
399 /* Create an entry for this header file. */
400
402 hfile = HEADER_FILES (dbxread_objfile) + i;
403 hfile->name = xstrdup (name);
404 hfile->instance = instance;
405 hfile->length = 10;
406 hfile->vector = XCNEWVEC (struct type *, 10);
407
409}
410
411#if 0
412static struct type **
413explicit_lookup_type (int real_filenum, int index)
414{
415 struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum];
416
417 if (index >= f->length)
418 {
419 f->length *= 2;
420 f->vector = (struct type **)
421 xrealloc (f->vector, f->length * sizeof (struct type *));
422 memset (&f->vector[f->length / 2],
423 '\0', f->length * sizeof (struct type *) / 2);
424 }
425 return &f->vector[index];
426}
427#endif
428
429static void
431 const char *name, CORE_ADDR address, int type,
432 struct objfile *objfile)
433{
434 enum minimal_symbol_type ms_type;
435 int section;
436
437 switch (type)
438 {
439 case N_TEXT | N_EXT:
440 ms_type = mst_text;
441 section = SECT_OFF_TEXT (objfile);
442 break;
443 case N_DATA | N_EXT:
444 ms_type = mst_data;
445 section = SECT_OFF_DATA (objfile);
446 break;
447 case N_BSS | N_EXT:
448 ms_type = mst_bss;
449 section = SECT_OFF_BSS (objfile);
450 break;
451 case N_ABS | N_EXT:
452 ms_type = mst_abs;
453 section = -1;
454 break;
455#ifdef N_SETV
456 case N_SETV | N_EXT:
457 ms_type = mst_data;
458 section = SECT_OFF_DATA (objfile);
459 break;
460 case N_SETV:
461 /* I don't think this type actually exists; since a N_SETV is the result
462 of going over many .o files, it doesn't make sense to have one
463 file local. */
464 ms_type = mst_file_data;
465 section = SECT_OFF_DATA (objfile);
466 break;
467#endif
468 case N_TEXT:
469 case N_NBTEXT:
470 case N_FN:
471 case N_FN_SEQ:
472 ms_type = mst_file_text;
473 section = SECT_OFF_TEXT (objfile);
474 break;
475 case N_DATA:
476 ms_type = mst_file_data;
477
478 /* Check for __DYNAMIC, which is used by Sun shared libraries.
479 Record it as global even if it's local, not global, so
480 lookup_minimal_symbol can find it. We don't check symbol_leading_char
481 because for SunOS4 it always is '_'. */
482 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
483 ms_type = mst_data;
484
485 /* Same with virtual function tables, both global and static. */
486 {
487 const char *tempstring = name;
488
489 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd.get ()))
490 ++tempstring;
491 if (is_vtable_name (tempstring))
492 ms_type = mst_data;
493 }
494 section = SECT_OFF_DATA (objfile);
495 break;
496 case N_BSS:
497 ms_type = mst_file_bss;
498 section = SECT_OFF_BSS (objfile);
499 break;
500 default:
501 ms_type = mst_unknown;
502 section = -1;
503 break;
504 }
505
506 if ((ms_type == mst_file_text || ms_type == mst_text)
507 && address < lowest_text_address)
508 lowest_text_address = address;
509
510 reader.record_with_info (name, address, ms_type, section);
511}
512
513/* Scan and build partial symbols for a symbol file.
514 We have been initialized by a call to dbx_symfile_init, which
515 put all the relevant info into a "struct dbx_symfile_info",
516 hung off the objfile structure. */
517
518static void
519dbx_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
520{
521 bfd *sym_bfd;
522 int val;
523
524 sym_bfd = objfile->obfd.get ();
525
526 /* .o and .nlm files are relocatables with text, data and bss segs based at
527 0. This flag disables special (Solaris stabs-in-elf only) fixups for
528 symbols with a value of 0. */
529
530 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
531
532 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
533 if (val < 0)
535
538
539 scoped_free_pendings free_pending;
540
542
543 /* Read stabs data from executable file and define symbols. */
544
546 psymtab_storage *partial_symtabs = psf->get_partial_symtabs ().get ();
547 objfile->qf.emplace_front (psf);
548 read_dbx_symtab (reader, partial_symtabs, objfile);
549
550 /* Install any minimal symbols that have been collected as the current
551 minimal symbols for this objfile. */
552
553 reader.install ();
554}
555
556/* Initialize anything that needs initializing when a completely new
557 symbol file is specified (not just adding some symbols from another
558 file, e.g. a shared library). */
559
560static void
561dbx_new_init (struct objfile *ignore)
562{
565}
566
567
568/* dbx_symfile_init ()
569 is the dbx-specific initialization routine for reading symbols.
570 It is passed a struct objfile which contains, among other things,
571 the BFD for the file whose symbols are being read, and a slot for a pointer
572 to "private data" which we fill with goodies.
573
574 We read the string table into malloc'd space and stash a pointer to it.
575
576 Since BFD doesn't know how to read debug symbols in a format-independent
577 way (and may never do so...), we have to do it ourselves. We will never
578 be called unless this is an a.out (or very similar) file.
579 FIXME, there should be a cleaner peephole into the BFD environment here. */
580
581#define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
582
583static void
585{
586 int val;
587 bfd *sym_bfd = objfile->obfd.get ();
588 const char *name = bfd_get_filename (sym_bfd);
589 asection *text_sect;
590 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
591
592 /* Allocate struct to keep track of the symfile. */
594
595 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
596 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
597 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
598
599 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
600#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
601#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
602
603 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
604
605 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
606 if (!text_sect)
607 error (_("Can't find .text section in symbol file"));
608 DBX_TEXT_ADDR (objfile) = bfd_section_vma (text_sect);
609 DBX_TEXT_SIZE (objfile) = bfd_section_size (text_sect);
610
611 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
612 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
614
615 /* Read the string table and stash it away in the objfile_obstack.
616 When we blow away the objfile the string table goes away as well.
617 Note that gdb used to use the results of attempting to malloc the
618 string table, based on the size it read, as a form of sanity check
619 for botched byte swapping, on the theory that a byte swapped string
620 table size would be so totally bogus that the malloc would fail. Now
621 that we put in on the objfile_obstack, we can't do this since gdb gets
622 a fatal error (out of virtual memory) if the size is bogus. We can
623 however at least check to see if the size is less than the size of
624 the size field itself, or larger than the size of the entire file.
625 Note that all valid string tables have a size greater than zero, since
626 the bytes used to hold the size are included in the count. */
627
628 if (STRING_TABLE_OFFSET == 0)
629 {
630 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
631 will never be zero, even when there is no string table. This
632 would appear to be a bug in bfd. */
634 DBX_STRINGTAB (objfile) = NULL;
635 }
636 else
637 {
638 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
639 if (val < 0)
641
642 memset (size_temp, 0, sizeof (size_temp));
643 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
644 if (val < 0)
645 {
647 }
648 else if (val == 0)
649 {
650 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
651 EOF if there is no string table, and attempting to read the size
652 from EOF will read zero bytes. */
654 DBX_STRINGTAB (objfile) = NULL;
655 }
656 else
657 {
658 /* Read some data that would appear to be the string table size.
659 If there really is a string table, then it is probably the right
660 size. Byteswap if necessary and validate the size. Note that
661 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
662 random data that happened to be at STRING_TABLE_OFFSET, because
663 bfd can't tell us there is no string table, the sanity checks may
664 or may not catch this. */
665 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
666
667 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
668 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
669 error (_("ridiculous string table size (%d bytes)."),
671
673 (char *) obstack_alloc (&objfile->objfile_obstack,
675 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
676
677 /* Now read in the string table in one big gulp. */
678
679 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
680 if (val < 0)
682 val = bfd_bread (DBX_STRINGTAB (objfile),
684 sym_bfd);
685 if (val != DBX_STRINGTAB_SIZE (objfile))
687 }
688 }
689}
690
691/* Perform any local cleanups required when we are done with a particular
692 objfile. I.E, we are in the process of discarding all symbol information
693 for an objfile, freeing up all memory held for it, and unlinking the
694 objfile struct from the global list of known objfiles. */
695
696static void
698{
700}
701
703{
704 if (header_files != NULL)
705 {
706 int i = n_header_files;
707 struct header_file *hfiles = header_files;
708
709 while (--i >= 0)
710 {
711 xfree (hfiles[i].name);
712 xfree (hfiles[i].vector);
713 }
714 xfree (hfiles);
715 }
716}
717
718
719
720/* Buffer for reading the symbol table entries. */
721static struct external_nlist symbuf[4096];
722static int symbuf_idx;
723static int symbuf_end;
724
725/* Name of last function encountered. Used in Solaris to approximate
726 object file boundaries. */
727static const char *last_function_name;
728
729/* The address in memory of the string table of the object file we are
730 reading (which might not be the "main" object file, but might be a
731 shared library or some other dynamically loaded thing). This is
732 set by read_dbx_symtab when building psymtabs, and by
733 read_ofile_symtab when building symtabs, and is used only by
734 next_symbol_text. FIXME: If that is true, we don't need it when
735 building psymtabs, right? */
736static char *stringtab_global;
737
738/* These variables are used to control fill_symbuf when the stabs
739 symbols are not contiguous (as may be the case when a COFF file is
740 linked using --split-by-reloc). */
741static const std::vector<asection *> *symbuf_sections;
742static size_t sect_idx;
743static unsigned int symbuf_left;
744static unsigned int symbuf_read;
745
746/* This variable stores a global stabs buffer, if we read stabs into
747 memory in one chunk in order to process relocations. */
748static bfd_byte *stabs_data;
749
750/* Refill the symbol table input buffer
751 and set the variables that control fetching entries from it.
752 Reports an error if no data available.
753 This function can read past the end of the symbol table
754 (into the string table) but this does no harm. */
755
756static void
757fill_symbuf (bfd *sym_bfd)
758{
759 unsigned int count;
760 int nbytes;
761
762 if (stabs_data)
763 {
764 nbytes = sizeof (symbuf);
765 if (nbytes > symbuf_left)
766 nbytes = symbuf_left;
767 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
768 }
769 else if (symbuf_sections == NULL)
770 {
771 count = sizeof (symbuf);
772 nbytes = bfd_bread (symbuf, count, sym_bfd);
773 }
774 else
775 {
776 if (symbuf_left <= 0)
777 {
778 file_ptr filepos = (*symbuf_sections)[sect_idx]->filepos;
779
780 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
781 perror_with_name (bfd_get_filename (sym_bfd));
782 symbuf_left = bfd_section_size ((*symbuf_sections)[sect_idx]);
784 ++sect_idx;
785 }
786
787 count = symbuf_left;
788 if (count > sizeof (symbuf))
789 count = sizeof (symbuf);
790 nbytes = bfd_bread (symbuf, count, sym_bfd);
791 }
792
793 if (nbytes < 0)
794 perror_with_name (bfd_get_filename (sym_bfd));
795 else if (nbytes == 0)
796 error (_("Premature end of file reading symbol table"));
797 symbuf_end = nbytes / symbol_size;
798 symbuf_idx = 0;
799 symbuf_left -= nbytes;
800 symbuf_read += nbytes;
801}
802
803static void
804stabs_seek (int sym_offset)
805{
806 if (stabs_data)
807 {
808 symbuf_read += sym_offset;
809 symbuf_left -= sym_offset;
810 }
811 else
812 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
813}
814
815#define INTERNALIZE_SYMBOL(intern, extern, abfd) \
816 { \
817 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
818 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
819 (intern).n_other = 0; \
820 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
821 if (bfd_get_sign_extend_vma (abfd)) \
822 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
823 else \
824 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
825 }
826
827/* Invariant: The symbol pointed to by symbuf_idx is the first one
828 that hasn't been swapped. Swap the symbol at the same time
829 that symbuf_idx is incremented. */
830
831/* dbx allows the text of a symbol name to be continued into the
832 next symbol name! When such a continuation is encountered
833 (a \ at the end of the text of a name)
834 call this function to get the continuation. */
835
836static const char *
838{
839 struct internal_nlist nlist;
840
841 if (symbuf_idx == symbuf_end)
843
844 symnum++;
846 OBJSTAT (objfile, n_stabs++);
847
848 symbuf_idx++;
849
850 return nlist.n_strx + stringtab_global + file_string_table_offset;
851}
852
853
854/* Given a name, value pair, find the corresponding
855 bincl in the list. Return the partial symtab associated
856 with that header_file_location. */
857
858static legacy_psymtab *
859find_corresponding_bincl_psymtab (const char *name, int instance)
860{
861 for (const header_file_location &bincl : *bincl_list)
862 if (bincl.instance == instance
863 && strcmp (name, bincl.name) == 0)
864 return bincl.pst;
865
867 return (legacy_psymtab *) 0;
868}
869
870/* Set namestring based on nlist. If the string table index is invalid,
871 give a fake name, and print a single error message per symbol file read,
872 rather than abort the symbol reading or flood the user with messages. */
873
874static const char *
875set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
876{
877 const char *namestring;
878
879 if (nlist->n_strx + file_string_table_offset
881 || nlist->n_strx + file_string_table_offset < nlist->n_strx)
882 {
883 complaint (_("bad string table offset in symbol %d"),
884 symnum);
885 namestring = "<bad string table offset>";
886 }
887 else
888 namestring = (nlist->n_strx + file_string_table_offset
890 return namestring;
891}
892
893static struct bound_minimal_symbol
894find_stab_function (const char *namestring, const char *filename,
895 struct objfile *objfile)
896{
897 struct bound_minimal_symbol msym;
898 int n;
899
900 const char *colon = strchr (namestring, ':');
901 if (colon == NULL)
902 n = 0;
903 else
904 n = colon - namestring;
905
906 char *p = (char *) alloca (n + 2);
907 strncpy (p, namestring, n);
908 p[n] = 0;
909
910 msym = lookup_minimal_symbol (p, filename, objfile);
911 if (msym.minsym == NULL)
912 {
913 /* Sun Fortran appends an underscore to the minimal symbol name,
914 try again with an appended underscore if the minimal symbol
915 was not found. */
916 p[n] = '_';
917 p[n + 1] = 0;
918 msym = lookup_minimal_symbol (p, filename, objfile);
919 }
920
921 if (msym.minsym == NULL && filename != NULL)
922 {
923 /* Try again without the filename. */
924 p[n] = 0;
925 msym = lookup_minimal_symbol (p, NULL, objfile);
926 }
927 if (msym.minsym == NULL && filename != NULL)
928 {
929 /* And try again for Sun Fortran, but without the filename. */
930 p[n] = '_';
931 p[n + 1] = 0;
932 msym = lookup_minimal_symbol (p, NULL, objfile);
933 }
934
935 return msym;
936}
937
938static void
940{
941 complaint (_("function `%s' appears to be defined "
942 "outside of all compilation units"),
943 arg1);
944}
945
946/* Setup partial_symtab's describing each source file for which
947 debugging information is available. */
948
949static void
951 psymtab_storage *partial_symtabs,
952 struct objfile *objfile)
953{
954 struct gdbarch *gdbarch = objfile->arch ();
955 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */
956 struct internal_nlist nlist;
957 CORE_ADDR text_addr;
958 int text_size;
959 const char *sym_name;
960 int sym_len;
961
962 const char *namestring;
963 int nsl;
964 int past_first_source_file = 0;
965 CORE_ADDR last_function_start = 0;
966 bfd *abfd;
967 int textlow_not_set;
968 int data_sect_index;
969
970 /* Current partial symtab. */
971 legacy_psymtab *pst;
972
973 /* List of current psymtab's include files. */
974 const char **psymtab_include_list;
975 int includes_allocated;
976 int includes_used;
977
978 /* Index within current psymtab dependency list. */
979 legacy_psymtab **dependency_list;
980 int dependencies_used, dependencies_allocated;
981
982 text_addr = DBX_TEXT_ADDR (objfile);
983 text_size = DBX_TEXT_SIZE (objfile);
984
985 /* FIXME. We probably want to change stringtab_global rather than add this
986 while processing every symbol entry. FIXME. */
989
991
992 pst = (legacy_psymtab *) 0;
993
994 includes_allocated = 30;
995 includes_used = 0;
996 psymtab_include_list = (const char **) alloca (includes_allocated *
997 sizeof (const char *));
998
999 dependencies_allocated = 30;
1000 dependencies_used = 0;
1001 dependency_list =
1002 (legacy_psymtab **) alloca (dependencies_allocated *
1003 sizeof (legacy_psymtab *));
1004
1005 /* Init bincl list */
1006 std::vector<struct header_file_location> bincl_storage;
1007 scoped_restore restore_bincl_global
1008 = make_scoped_restore (&bincl_list, &bincl_storage);
1009
1010 set_last_source_file (NULL);
1011
1012 lowest_text_address = (CORE_ADDR) -1;
1013
1014 symfile_bfd = objfile->obfd.get (); /* For next_text_symbol. */
1015 abfd = objfile->obfd.get ();
1016 symbuf_end = symbuf_idx = 0;
1018 textlow_not_set = 1;
1019 has_line_numbers = 0;
1020
1021 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1022 to global and static variables. The stab for a global or static
1023 variable doesn't give us any indication of which section it's in,
1024 so we can't tell immediately which offset in
1025 objfile->section_offsets we should apply to the variable's
1026 address.
1027
1028 We could certainly find out which section contains the variable
1029 by looking up the variable's unrelocated address with
1030 find_pc_section, but that would be expensive; this is the
1031 function that constructs the partial symbol tables by examining
1032 every symbol in the entire executable, and it's
1033 performance-critical. So that expense would not be welcome. I'm
1034 not sure what to do about this at the moment.
1035
1036 What we have done for years is to simply assume that the .data
1037 section's offset is appropriate for all global and static
1038 variables. Recently, this was expanded to fall back to the .bss
1039 section's offset if there is no .data section, and then to the
1040 .rodata section's offset. */
1041 data_sect_index = objfile->sect_index_data;
1042 if (data_sect_index == -1)
1043 data_sect_index = SECT_OFF_BSS (objfile);
1044 if (data_sect_index == -1)
1045 data_sect_index = SECT_OFF_RODATA (objfile);
1046
1047 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1048 for the file to have no .data, no .bss, and no .text at all, if
1049 it also has no global or static variables. */
1050
1051 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1052 {
1053 /* Get the symbol for this run and pull out some info. */
1054 QUIT; /* Allow this to be interruptable. */
1055 if (symbuf_idx == symbuf_end)
1056 fill_symbuf (abfd);
1057 bufp = &symbuf[symbuf_idx++];
1058
1059 /*
1060 * Special case to speed up readin.
1061 */
1062 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1063 {
1064 has_line_numbers = 1;
1065 continue;
1066 }
1067
1068 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1069 OBJSTAT (objfile, n_stabs++);
1070
1071 /* Ok. There is a lot of code duplicated in the rest of this
1072 switch statement (for efficiency reasons). Since I don't
1073 like duplicating code, I will do my penance here, and
1074 describe the code which is duplicated:
1075
1076 *) The assignment to namestring.
1077 *) The call to strchr.
1078 *) The addition of a partial symbol the two partial
1079 symbol lists. This last is a large section of code, so
1080 I've imbedded it in the following macro. */
1081
1082 switch (nlist.n_type)
1083 {
1084 /*
1085 * Standard, external, non-debugger, symbols
1086 */
1087
1088 case N_TEXT | N_EXT:
1089 case N_NBTEXT | N_EXT:
1090 goto record_it;
1091
1092 case N_DATA | N_EXT:
1093 case N_NBDATA | N_EXT:
1094 goto record_it;
1095
1096 case N_BSS:
1097 case N_BSS | N_EXT:
1098 case N_NBBSS | N_EXT:
1099 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1100 goto record_it;
1101
1102 case N_ABS | N_EXT:
1103 record_it:
1104 namestring = set_namestring (objfile, &nlist);
1105
1106 record_minimal_symbol (reader, namestring, nlist.n_value,
1107 nlist.n_type, objfile); /* Always */
1108 continue;
1109
1110 /* Standard, local, non-debugger, symbols. */
1111
1112 case N_NBTEXT:
1113
1114 /* We need to be able to deal with both N_FN or N_TEXT,
1115 because we have no way of knowing whether the sys-supplied ld
1116 or GNU ld was used to make the executable. Sequents throw
1117 in another wrinkle -- they renumbered N_FN. */
1118
1119 case N_FN:
1120 case N_FN_SEQ:
1121 case N_TEXT:
1122 namestring = set_namestring (objfile, &nlist);
1123
1124 if ((namestring[0] == '-' && namestring[1] == 'l')
1125 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1126 && namestring[nsl - 2] == '.'))
1127 {
1128 if (past_first_source_file && pst
1129 /* The gould NP1 uses low values for .o and -l symbols
1130 which are not the address. */
1131 && nlist.n_value >= pst->raw_text_low ())
1132 {
1133 dbx_end_psymtab (objfile, partial_symtabs,
1134 pst, psymtab_include_list,
1135 includes_used, symnum * symbol_size,
1136 nlist.n_value > pst->raw_text_high ()
1137 ? nlist.n_value : pst->raw_text_high (),
1138 dependency_list, dependencies_used,
1139 textlow_not_set);
1140 pst = (legacy_psymtab *) 0;
1141 includes_used = 0;
1142 dependencies_used = 0;
1143 has_line_numbers = 0;
1144 }
1145 else
1146 past_first_source_file = 1;
1147 }
1148 else
1149 goto record_it;
1150 continue;
1151
1152 case N_DATA:
1153 goto record_it;
1154
1155 case N_UNDF | N_EXT:
1156 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1157 We used to rely on the target to tell us whether it knows
1158 where the symbol has been relocated to, but none of the
1159 target implementations actually provided that operation.
1160 So we just ignore the symbol, the same way we would do if
1161 we had a target-side symbol lookup which returned no match.
1162
1163 All other symbols (with nlist.n_value == 0), are really
1164 undefined, and so we ignore them too. */
1165 continue;
1166
1167 case N_UNDF:
1168 if (processing_acc_compilation && nlist.n_strx == 1)
1169 {
1170 /* Deal with relative offsets in the string table
1171 used in ELF+STAB under Solaris. If we want to use the
1172 n_strx field, which contains the name of the file,
1173 we must adjust file_string_table_offset *before* calling
1174 set_namestring(). */
1175 past_first_source_file = 1;
1178 file_string_table_offset + nlist.n_value;
1180 error (_("string table offset backs up at %d"), symnum);
1181 /* FIXME -- replace error() with complaint. */
1182 continue;
1183 }
1184 continue;
1185
1186 /* Lots of symbol types we can just ignore. */
1187
1188 case N_ABS:
1189 case N_NBDATA:
1190 case N_NBBSS:
1191 continue;
1192
1193 /* Keep going . . . */
1194
1195 /*
1196 * Special symbol types for GNU
1197 */
1198 case N_INDR:
1199 case N_INDR | N_EXT:
1200 case N_SETA:
1201 case N_SETA | N_EXT:
1202 case N_SETT:
1203 case N_SETT | N_EXT:
1204 case N_SETD:
1205 case N_SETD | N_EXT:
1206 case N_SETB:
1207 case N_SETB | N_EXT:
1208 case N_SETV:
1209 continue;
1210
1211 /*
1212 * Debugger symbols
1213 */
1214
1215 case N_SO:
1216 {
1217 CORE_ADDR valu;
1218 static int prev_so_symnum = -10;
1219 static int first_so_symnum;
1220 const char *p;
1221 static const char *dirname_nso;
1222 int prev_textlow_not_set;
1223
1224 valu = nlist.n_value;
1225
1226 prev_textlow_not_set = textlow_not_set;
1227
1228 /* A zero value is probably an indication for the SunPRO 3.0
1229 compiler. dbx_end_psymtab explicitly tests for zero, so
1230 don't relocate it. */
1231
1232 if (nlist.n_value == 0
1234 {
1235 textlow_not_set = 1;
1236 valu = 0;
1237 }
1238 else
1239 textlow_not_set = 0;
1240
1241 past_first_source_file = 1;
1242
1243 if (prev_so_symnum != symnum - 1)
1244 { /* Here if prev stab wasn't N_SO. */
1245 first_so_symnum = symnum;
1246
1247 if (pst)
1248 {
1249 dbx_end_psymtab (objfile, partial_symtabs,
1250 pst, psymtab_include_list,
1251 includes_used, symnum * symbol_size,
1252 (valu > pst->raw_text_high ()
1253 ? valu : pst->raw_text_high ()),
1254 dependency_list, dependencies_used,
1255 prev_textlow_not_set);
1256 pst = (legacy_psymtab *) 0;
1257 includes_used = 0;
1258 dependencies_used = 0;
1259 has_line_numbers = 0;
1260 }
1261 }
1262
1263 prev_so_symnum = symnum;
1264
1265 /* End the current partial symtab and start a new one. */
1266
1267 namestring = set_namestring (objfile, &nlist);
1268
1269 /* Null name means end of .o file. Don't start a new one. */
1270 if (*namestring == '\000')
1271 continue;
1272
1273 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1274 The first one is a directory name; the second the file name.
1275 If pst exists, is empty, and has a filename ending in '/',
1276 we assume the previous N_SO was a directory name. */
1277
1278 p = lbasename (namestring);
1279 if (p != namestring && *p == '\000')
1280 {
1281 /* Save the directory name SOs locally, then save it into
1282 the psymtab when it's created below. */
1283 dirname_nso = namestring;
1284 continue;
1285 }
1286
1287 /* Some other compilers (C++ ones in particular) emit useless
1288 SOs for non-existant .c files. We ignore all subsequent SOs
1289 that immediately follow the first. */
1290
1291 if (!pst)
1292 {
1293 pst = start_psymtab (partial_symtabs, objfile,
1294 namestring, valu,
1295 first_so_symnum * symbol_size);
1296 pst->dirname = dirname_nso;
1297 dirname_nso = NULL;
1298 }
1299 continue;
1300 }
1301
1302 case N_BINCL:
1303 {
1304 enum language tmp_language;
1305
1306 /* Add this bincl to the bincl_list for future EXCLs. No
1307 need to save the string; it'll be around until
1308 read_dbx_symtab function returns. */
1309
1310 namestring = set_namestring (objfile, &nlist);
1311 tmp_language = deduce_language_from_filename (namestring);
1312
1313 /* Only change the psymtab's language if we've learned
1314 something useful (eg. tmp_language is not language_unknown).
1315 In addition, to match what start_subfile does, never change
1316 from C++ to C. */
1317 if (tmp_language != language_unknown
1318 && (tmp_language != language_c
1320 psymtab_language = tmp_language;
1321
1322 if (pst == NULL)
1323 {
1324 /* FIXME: we should not get here without a PST to work on.
1325 Attempt to recover. */
1326 complaint (_("N_BINCL %s not in entries for "
1327 "any file, at symtab pos %d"),
1328 namestring, symnum);
1329 continue;
1330 }
1331 bincl_list->emplace_back (namestring, nlist.n_value, pst);
1332
1333 /* Mark down an include file in the current psymtab. */
1334
1335 goto record_include_file;
1336 }
1337
1338 case N_SOL:
1339 {
1340 enum language tmp_language;
1341
1342 /* Mark down an include file in the current psymtab. */
1343 namestring = set_namestring (objfile, &nlist);
1344 tmp_language = deduce_language_from_filename (namestring);
1345
1346 /* Only change the psymtab's language if we've learned
1347 something useful (eg. tmp_language is not language_unknown).
1348 In addition, to match what start_subfile does, never change
1349 from C++ to C. */
1350 if (tmp_language != language_unknown
1351 && (tmp_language != language_c
1353 psymtab_language = tmp_language;
1354
1355 /* In C++, one may expect the same filename to come round many
1356 times, when code is coming alternately from the main file
1357 and from inline functions in other files. So I check to see
1358 if this is a file we've seen before -- either the main
1359 source file, or a previously included file.
1360
1361 This seems to be a lot of time to be spending on N_SOL, but
1362 things like "break c-exp.y:435" need to work (I
1363 suppose the psymtab_include_list could be hashed or put
1364 in a binary tree, if profiling shows this is a major hog). */
1365 if (pst && filename_cmp (namestring, pst->filename) == 0)
1366 continue;
1367 {
1368 int i;
1369
1370 for (i = 0; i < includes_used; i++)
1371 if (filename_cmp (namestring, psymtab_include_list[i]) == 0)
1372 {
1373 i = -1;
1374 break;
1375 }
1376 if (i == -1)
1377 continue;
1378 }
1379
1380 record_include_file:
1381
1382 psymtab_include_list[includes_used++] = namestring;
1383 if (includes_used >= includes_allocated)
1384 {
1385 const char **orig = psymtab_include_list;
1386
1387 psymtab_include_list = (const char **)
1388 alloca ((includes_allocated *= 2) * sizeof (const char *));
1389 memcpy (psymtab_include_list, orig,
1390 includes_used * sizeof (const char *));
1391 }
1392 continue;
1393 }
1394 case N_LSYM: /* Typedef or automatic variable. */
1395 case N_STSYM: /* Data seg var -- static. */
1396 case N_LCSYM: /* BSS " */
1397 case N_ROSYM: /* Read-only data seg var -- static. */
1398 case N_NBSTS: /* Gould nobase. */
1399 case N_NBLCS: /* symbols. */
1400 case N_FUN:
1401 case N_GSYM: /* Global (extern) variable; can be
1402 data or bss (sigh FIXME). */
1403
1404 /* Following may probably be ignored; I'll leave them here
1405 for now (until I do Pascal and Modula 2 extensions). */
1406
1407 case N_PC: /* I may or may not need this; I
1408 suspect not. */
1409 case N_M2C: /* I suspect that I can ignore this here. */
1410 case N_SCOPE: /* Same. */
1411 {
1412 const char *p;
1413
1414 namestring = set_namestring (objfile, &nlist);
1415
1416 /* See if this is an end of function stab. */
1417 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1418 {
1419 CORE_ADDR valu;
1420
1421 /* It's value is the size (in bytes) of the function for
1422 function relative stabs, or the address of the function's
1423 end for old style stabs. */
1424 valu = nlist.n_value + last_function_start;
1425 if (pst->raw_text_high () == 0 || valu > pst->raw_text_high ())
1426 pst->set_text_high (valu);
1427 break;
1428 }
1429
1430 p = (char *) strchr (namestring, ':');
1431 if (!p)
1432 continue; /* Not a debugging symbol. */
1433
1434 sym_len = 0;
1435 sym_name = NULL; /* pacify "gcc -Werror" */
1437 {
1438 std::string name (namestring, p - namestring);
1439 gdb::unique_xmalloc_ptr<char> new_name
1440 = cp_canonicalize_string (name.c_str ());
1441 if (new_name != nullptr)
1442 {
1443 sym_len = strlen (new_name.get ());
1444 sym_name = obstack_strdup (&objfile->objfile_obstack,
1445 new_name.get ());
1446 }
1447 }
1448 else if (psymtab_language == language_c)
1449 {
1450 std::string name (namestring, p - namestring);
1451 gdb::unique_xmalloc_ptr<char> new_name
1452 = c_canonicalize_name (name.c_str ());
1453 if (new_name != nullptr)
1454 {
1455 sym_len = strlen (new_name.get ());
1456 sym_name = obstack_strdup (&objfile->objfile_obstack,
1457 new_name.get ());
1458 }
1459 }
1460
1461 if (sym_len == 0)
1462 {
1463 sym_name = namestring;
1464 sym_len = p - namestring;
1465 }
1466
1467 /* Main processing section for debugging symbols which
1468 the initial read through the symbol tables needs to worry
1469 about. If we reach this point, the symbol which we are
1470 considering is definitely one we are interested in.
1471 p must also contain the (valid) index into the namestring
1472 which indicates the debugging type symbol. */
1473
1474 switch (p[1])
1475 {
1476 case 'S':
1477 if (pst != nullptr)
1478 pst->add_psymbol (gdb::string_view (sym_name, sym_len), true,
1480 data_sect_index,
1482 nlist.n_value, psymtab_language,
1483 partial_symtabs, objfile);
1484 else
1485 complaint (_("static `%*s' appears to be defined "
1486 "outside of all compilation units"),
1487 sym_len, sym_name);
1488 continue;
1489
1490 case 'G':
1491 /* The addresses in these entries are reported to be
1492 wrong. See the code that reads 'G's for symtabs. */
1493 if (pst != nullptr)
1494 pst->add_psymbol (gdb::string_view (sym_name, sym_len), true,
1496 data_sect_index,
1498 nlist.n_value, psymtab_language,
1499 partial_symtabs, objfile);
1500 else
1501 complaint (_("global `%*s' appears to be defined "
1502 "outside of all compilation units"),
1503 sym_len, sym_name);
1504 continue;
1505
1506 case 'T':
1507 /* When a 'T' entry is defining an anonymous enum, it
1508 may have a name which is the empty string, or a
1509 single space. Since they're not really defining a
1510 symbol, those shouldn't go in the partial symbol
1511 table. We do pick up the elements of such enums at
1512 'check_enum:', below. */
1513 if (p >= namestring + 2
1514 || (p == namestring + 1
1515 && namestring[0] != ' '))
1516 {
1517 if (pst != nullptr)
1518 pst->add_psymbol (gdb::string_view (sym_name, sym_len),
1519 true, STRUCT_DOMAIN, LOC_TYPEDEF, -1,
1522 partial_symtabs, objfile);
1523 else
1524 complaint (_("enum, struct, or union `%*s' appears "
1525 "to be defined outside of all "
1526 "compilation units"),
1527 sym_len, sym_name);
1528 if (p[2] == 't')
1529 {
1530 /* Also a typedef with the same name. */
1531 if (pst != nullptr)
1532 pst->add_psymbol (gdb::string_view (sym_name, sym_len),
1533 true, VAR_DOMAIN, LOC_TYPEDEF, -1,
1536 partial_symtabs, objfile);
1537 else
1538 complaint (_("typedef `%*s' appears to be defined "
1539 "outside of all compilation units"),
1540 sym_len, sym_name);
1541 p += 1;
1542 }
1543 }
1544 goto check_enum;
1545
1546 case 't':
1547 if (p != namestring) /* a name is there, not just :T... */
1548 {
1549 if (pst != nullptr)
1550 pst->add_psymbol (gdb::string_view (sym_name, sym_len),
1551 true, VAR_DOMAIN, LOC_TYPEDEF, -1,
1554 partial_symtabs, objfile);
1555 else
1556 complaint (_("typename `%*s' appears to be defined "
1557 "outside of all compilation units"),
1558 sym_len, sym_name);
1559 }
1560 check_enum:
1561 /* If this is an enumerated type, we need to
1562 add all the enum constants to the partial symbol
1563 table. This does not cover enums without names, e.g.
1564 "enum {a, b} c;" in C, but fortunately those are
1565 rare. There is no way for GDB to find those from the
1566 enum type without spending too much time on it. Thus
1567 to solve this problem, the compiler needs to put out the
1568 enum in a nameless type. GCC2 does this. */
1569
1570 /* We are looking for something of the form
1571 <name> ":" ("t" | "T") [<number> "="] "e"
1572 {<constant> ":" <value> ","} ";". */
1573
1574 /* Skip over the colon and the 't' or 'T'. */
1575 p += 2;
1576 /* This type may be given a number. Also, numbers can come
1577 in pairs like (0,26). Skip over it. */
1578 while ((*p >= '0' && *p <= '9')
1579 || *p == '(' || *p == ',' || *p == ')'
1580 || *p == '=')
1581 p++;
1582
1583 if (*p++ == 'e')
1584 {
1585 /* The aix4 compiler emits extra crud before the members. */
1586 if (*p == '-')
1587 {
1588 /* Skip over the type (?). */
1589 while (*p != ':')
1590 p++;
1591
1592 /* Skip over the colon. */
1593 p++;
1594 }
1595
1596 /* We have found an enumerated type. */
1597 /* According to comments in read_enum_type
1598 a comma could end it instead of a semicolon.
1599 I don't know where that happens.
1600 Accept either. */
1601 while (*p && *p != ';' && *p != ',')
1602 {
1603 const char *q;
1604
1605 /* Check for and handle cretinous dbx symbol name
1606 continuation! */
1607 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1609
1610 /* Point to the character after the name
1611 of the enum constant. */
1612 for (q = p; *q && *q != ':'; q++)
1613 ;
1614 /* Note that the value doesn't matter for
1615 enum constants in psymtabs, just in symtabs. */
1616 if (pst != nullptr)
1617 pst->add_psymbol (gdb::string_view (p, q - p), true,
1618 VAR_DOMAIN, LOC_CONST, -1,
1621 partial_symtabs, objfile);
1622 else
1623 complaint (_("enum constant `%*s' appears to be defined "
1624 "outside of all compilation units"),
1625 ((int) (q - p)), p);
1626 /* Point past the name. */
1627 p = q;
1628 /* Skip over the value. */
1629 while (*p && *p != ',')
1630 p++;
1631 /* Advance past the comma. */
1632 if (*p)
1633 p++;
1634 }
1635 }
1636 continue;
1637
1638 case 'c':
1639 /* Constant, e.g. from "const" in Pascal. */
1640 if (pst != nullptr)
1641 pst->add_psymbol (gdb::string_view (sym_name, sym_len), true,
1642 VAR_DOMAIN, LOC_CONST, -1,
1645 partial_symtabs, objfile);
1646 else
1647 complaint (_("constant `%*s' appears to be defined "
1648 "outside of all compilation units"),
1649 sym_len, sym_name);
1650
1651 continue;
1652
1653 case 'f':
1654 if (! pst)
1655 {
1656 std::string name (namestring, (p - namestring));
1658 }
1659 /* Kludges for ELF/STABS with Sun ACC. */
1660 last_function_name = namestring;
1661 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1662 value for the bottom of the text seg in those cases. */
1663 if (nlist.n_value == 0
1665 {
1667 = find_stab_function (namestring,
1668 pst ? pst->filename : NULL,
1669 objfile);
1670 if (minsym.minsym != NULL)
1671 nlist.n_value = minsym.minsym->value_raw_address ();
1672 }
1673 if (pst && textlow_not_set
1675 {
1676 pst->set_text_low (nlist.n_value);
1677 textlow_not_set = 0;
1678 }
1679 /* End kludge. */
1680
1681 /* Keep track of the start of the last function so we
1682 can handle end of function symbols. */
1683 last_function_start = nlist.n_value;
1684
1685 /* In reordered executables this function may lie outside
1686 the bounds created by N_SO symbols. If that's the case
1687 use the address of this function as the low bound for
1688 the partial symbol table. */
1689 if (pst
1690 && (textlow_not_set
1691 || (nlist.n_value < pst->raw_text_low ()
1692 && (nlist.n_value != 0))))
1693 {
1694 pst->set_text_low (nlist.n_value);
1695 textlow_not_set = 0;
1696 }
1697 if (pst != nullptr)
1698 pst->add_psymbol (gdb::string_view (sym_name, sym_len), true,
1702 nlist.n_value, psymtab_language,
1703 partial_symtabs, objfile);
1704 continue;
1705
1706 /* Global functions were ignored here, but now they
1707 are put into the global psymtab like one would expect.
1708 They're also in the minimal symbol table. */
1709 case 'F':
1710 if (! pst)
1711 {
1712 std::string name (namestring, (p - namestring));
1714 }
1715 /* Kludges for ELF/STABS with Sun ACC. */
1716 last_function_name = namestring;
1717 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1718 value for the bottom of the text seg in those cases. */
1719 if (nlist.n_value == 0
1721 {
1723 = find_stab_function (namestring,
1724 pst ? pst->filename : NULL,
1725 objfile);
1726 if (minsym.minsym != NULL)
1727 nlist.n_value = minsym.minsym->value_raw_address ();
1728 }
1729 if (pst && textlow_not_set
1731 {
1732 pst->set_text_low (nlist.n_value);
1733 textlow_not_set = 0;
1734 }
1735 /* End kludge. */
1736
1737 /* Keep track of the start of the last function so we
1738 can handle end of function symbols. */
1739 last_function_start = nlist.n_value;
1740
1741 /* In reordered executables this function may lie outside
1742 the bounds created by N_SO symbols. If that's the case
1743 use the address of this function as the low bound for
1744 the partial symbol table. */
1745 if (pst
1746 && (textlow_not_set
1747 || (nlist.n_value < pst->raw_text_low ()
1748 && (nlist.n_value != 0))))
1749 {
1750 pst->set_text_low (nlist.n_value);
1751 textlow_not_set = 0;
1752 }
1753 if (pst != nullptr)
1754 pst->add_psymbol (gdb::string_view (sym_name, sym_len), true,
1758 nlist.n_value, psymtab_language,
1759 partial_symtabs, objfile);
1760 continue;
1761
1762 /* Two things show up here (hopefully); static symbols of
1763 local scope (static used inside braces) or extensions
1764 of structure symbols. We can ignore both. */
1765 case 'V':
1766 case '(':
1767 case '0':
1768 case '1':
1769 case '2':
1770 case '3':
1771 case '4':
1772 case '5':
1773 case '6':
1774 case '7':
1775 case '8':
1776 case '9':
1777 case '-':
1778 case '#': /* For symbol identification (used in live ranges). */
1779 continue;
1780
1781 case ':':
1782 /* It is a C++ nested symbol. We don't need to record it
1783 (I don't think); if we try to look up foo::bar::baz,
1784 then symbols for the symtab containing foo should get
1785 read in, I think. */
1786 /* Someone says sun cc puts out symbols like
1787 /foo/baz/maclib::/usr/local/bin/maclib,
1788 which would get here with a symbol type of ':'. */
1789 continue;
1790
1791 default:
1792 /* Unexpected symbol descriptor. The second and subsequent stabs
1793 of a continued stab can show up here. The question is
1794 whether they ever can mimic a normal stab--it would be
1795 nice if not, since we certainly don't want to spend the
1796 time searching to the end of every string looking for
1797 a backslash. */
1798
1799 complaint (_("unknown symbol descriptor `%c'"),
1800 p[1]);
1801
1802 /* Ignore it; perhaps it is an extension that we don't
1803 know about. */
1804 continue;
1805 }
1806 }
1807
1808 case N_EXCL:
1809
1810 namestring = set_namestring (objfile, &nlist);
1811
1812 /* Find the corresponding bincl and mark that psymtab on the
1813 psymtab dependency list. */
1814 {
1815 legacy_psymtab *needed_pst =
1816 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
1817
1818 /* If this include file was defined earlier in this file,
1819 leave it alone. */
1820 if (needed_pst == pst)
1821 continue;
1822
1823 if (needed_pst)
1824 {
1825 int i;
1826 int found = 0;
1827
1828 for (i = 0; i < dependencies_used; i++)
1829 if (dependency_list[i] == needed_pst)
1830 {
1831 found = 1;
1832 break;
1833 }
1834
1835 /* If it's already in the list, skip the rest. */
1836 if (found)
1837 continue;
1838
1839 dependency_list[dependencies_used++] = needed_pst;
1840 if (dependencies_used >= dependencies_allocated)
1841 {
1842 legacy_psymtab **orig = dependency_list;
1843
1844 dependency_list =
1845 (legacy_psymtab **)
1846 alloca ((dependencies_allocated *= 2)
1847 * sizeof (legacy_psymtab *));
1848 memcpy (dependency_list, orig,
1849 (dependencies_used
1850 * sizeof (legacy_psymtab *)));
1851#ifdef DEBUG_INFO
1853 "Had to reallocate "
1854 "dependency list.\n");
1856 "New dependencies allocated: %d\n",
1857 dependencies_allocated);
1858#endif
1859 }
1860 }
1861 }
1862 continue;
1863
1864 case N_ENDM:
1865 /* Solaris 2 end of module, finish current partial symbol
1866 table. dbx_end_psymtab will set the high text address of
1867 PST to the proper value, which is necessary if a module
1868 compiled without debugging info follows this module. */
1870 {
1871 dbx_end_psymtab (objfile, partial_symtabs, pst,
1872 psymtab_include_list, includes_used,
1874 (CORE_ADDR) 0, dependency_list,
1875 dependencies_used, textlow_not_set);
1876 pst = (legacy_psymtab *) 0;
1877 includes_used = 0;
1878 dependencies_used = 0;
1879 has_line_numbers = 0;
1880 }
1881 continue;
1882
1883 case N_RBRAC:
1884#ifdef HANDLE_RBRAC
1885 HANDLE_RBRAC (nlist.n_value);
1886 continue;
1887#endif
1888 case N_EINCL:
1889 case N_DSLINE:
1890 case N_BSLINE:
1891 case N_SSYM: /* Claim: Structure or union element.
1892 Hopefully, I can ignore this. */
1893 case N_ENTRY: /* Alternate entry point; can ignore. */
1894 case N_MAIN: /* Can definitely ignore this. */
1895 case N_CATCH: /* These are GNU C++ extensions */
1896 case N_EHDECL: /* that can safely be ignored here. */
1897 case N_LENG:
1898 case N_BCOMM:
1899 case N_ECOMM:
1900 case N_ECOML:
1901 case N_FNAME:
1902 case N_SLINE:
1903 case N_RSYM:
1904 case N_PSYM:
1905 case N_BNSYM:
1906 case N_ENSYM:
1907 case N_LBRAC:
1908 case N_NSYMS: /* Ultrix 4.0: symbol count */
1909 case N_DEFD: /* GNU Modula-2 */
1910 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
1911
1912 case N_OBJ: /* Useless types from Solaris. */
1913 case N_OPT:
1914 case N_PATCH:
1915 /* These symbols aren't interesting; don't worry about them. */
1916 continue;
1917
1918 default:
1919 /* If we haven't found it yet, ignore it. It's probably some
1920 new type we don't know about yet. */
1921 unknown_symtype_complaint (hex_string (nlist.n_type));
1922 continue;
1923 }
1924 }
1925
1926 /* If there's stuff to be cleaned up, clean it up. */
1927 if (pst)
1928 {
1929 /* Don't set high text address of PST lower than it already
1930 is. */
1931 CORE_ADDR text_end =
1932 (lowest_text_address == (CORE_ADDR) -1
1933 ? text_addr
1935 + text_size;
1936
1937 dbx_end_psymtab (objfile, partial_symtabs,
1938 pst, psymtab_include_list, includes_used,
1940 (text_end > pst->raw_text_high ()
1941 ? text_end : pst->raw_text_high ()),
1942 dependency_list, dependencies_used, textlow_not_set);
1943 }
1944}
1945
1946/* Allocate and partially fill a partial symtab. It will be
1947 completely filled at the end of the symbol list.
1948
1949 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1950 is the address relative to which its symbols are (incremental) or 0
1951 (normal). */
1952
1953static legacy_psymtab *
1955 const char *filename, CORE_ADDR textlow, int ldsymoff)
1956{
1957 legacy_psymtab *result = new legacy_psymtab (filename, partial_symtabs,
1958 objfile->per_bfd, textlow);
1959
1960 result->read_symtab_private =
1961 XOBNEW (&objfile->objfile_obstack, struct symloc);
1962 LDSYMOFF (result) = ldsymoff;
1965 SYMBOL_SIZE (result) = symbol_size;
1969
1970 /* Deduce the source language from the filename for this psymtab. */
1972 PST_LANGUAGE (result) = psymtab_language;
1973
1974 return result;
1975}
1976
1977/* Close off the current usage of PST.
1978 Returns PST or NULL if the partial symtab was empty and thrown away.
1979
1980 FIXME: List variables and peculiarities of same. */
1981
1984 legacy_psymtab *pst,
1985 const char **include_list, int num_includes,
1986 int capping_symbol_offset, CORE_ADDR capping_text,
1987 legacy_psymtab **dependency_list,
1988 int number_dependencies,
1989 int textlow_not_set)
1990{
1991 int i;
1992 struct gdbarch *gdbarch = objfile->arch ();
1993
1994 if (capping_symbol_offset != -1)
1995 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
1996 pst->set_text_high (capping_text);
1997
1998 /* Under Solaris, the N_SO symbols always have a value of 0,
1999 instead of the usual address of the .o file. Therefore,
2000 we have to do some tricks to fill in texthigh and textlow.
2001 The first trick is: if we see a static
2002 or global function, and the textlow for the current pst
2003 is not set (ie: textlow_not_set), then we use that function's
2004 address for the textlow of the pst. */
2005
2006 /* Now, to fill in texthigh, we remember the last function seen
2007 in the .o file. Also, there's a hack in
2008 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2009 to here via the misc_info field. Therefore, we can fill in
2010 a reliable texthigh by taking the address plus size of the
2011 last function in the file. */
2012
2015 {
2016 int n;
2018
2019 const char *colon = strchr (last_function_name, ':');
2020 if (colon == NULL)
2021 n = 0;
2022 else
2023 n = colon - last_function_name;
2024 char *p = (char *) alloca (n + 2);
2025 strncpy (p, last_function_name, n);
2026 p[n] = 0;
2027
2029 if (minsym.minsym == NULL)
2030 {
2031 /* Sun Fortran appends an underscore to the minimal symbol name,
2032 try again with an appended underscore if the minimal symbol
2033 was not found. */
2034 p[n] = '_';
2035 p[n + 1] = 0;
2037 }
2038
2039 if (minsym.minsym)
2040 pst->set_text_high (minsym.minsym->value_raw_address ()
2041 + minsym.minsym->size ());
2042
2043 last_function_name = NULL;
2044 }
2045
2047 ;
2048 /* This test will be true if the last .o file is only data. */
2049 else if (textlow_not_set)
2050 pst->set_text_low (pst->raw_text_high ());
2051 else
2052 {
2053 /* If we know our own starting text address, then walk through all other
2054 psymtabs for this objfile, and if any didn't know their ending text
2055 address, set it to our starting address. Take care to not set our
2056 own ending address to our starting address. */
2057
2058 for (partial_symtab *p1 : partial_symtabs->range ())
2059 if (!p1->text_high_valid && p1->text_low_valid && p1 != pst)
2060 p1->set_text_high (pst->raw_text_low ());
2061 }
2062
2063 /* End of kludge for patching Solaris textlow and texthigh. */
2064
2065 pst->end ();
2066
2067 pst->number_of_dependencies = number_dependencies;
2068 if (number_dependencies)
2069 {
2070 pst->dependencies
2071 = partial_symtabs->allocate_dependencies (number_dependencies);
2072 memcpy (pst->dependencies, dependency_list,
2073 number_dependencies * sizeof (legacy_psymtab *));
2074 }
2075 else
2076 pst->dependencies = 0;
2077
2078 for (i = 0; i < num_includes; i++)
2079 {
2080 legacy_psymtab *subpst =
2081 new legacy_psymtab (include_list[i], partial_symtabs, objfile->per_bfd);
2082
2083 subpst->read_symtab_private =
2084 XOBNEW (&objfile->objfile_obstack, struct symloc);
2085 LDSYMOFF (subpst) =
2086 LDSYMLEN (subpst) = 0;
2087
2088 /* We could save slight bits of space by only making one of these,
2089 shared by the entire set of include files. FIXME-someday. */
2090 subpst->dependencies =
2091 partial_symtabs->allocate_dependencies (1);
2092 subpst->dependencies[0] = pst;
2093 subpst->number_of_dependencies = 1;
2094
2097 }
2098
2099 if (num_includes == 0
2100 && number_dependencies == 0
2101 && pst->empty ()
2102 && has_line_numbers == 0)
2103 {
2104 /* Throw away this psymtab, it's empty. */
2105 /* Empty psymtabs happen as a result of header files which don't have
2106 any symbols in them. There can be a lot of them. But this check
2107 is wrong, in that a psymtab with N_SLINE entries but nothing else
2108 is not empty, but we don't realize that. Fixing that without slowing
2109 things down might be tricky. */
2110
2111 partial_symtabs->discard_psymtab (pst);
2112
2113 /* Indicate that psymtab was thrown away. */
2114 pst = NULL;
2115 }
2116 return pst;
2117}
2118
2119static void
2121{
2122 gdb_assert (!pst->readin);
2123
2124 /* Read in all partial symtabs on which this one is dependent. */
2126
2127 if (LDSYMLEN (pst)) /* Otherwise it's a dummy. */
2128 {
2129 /* Init stuff necessary for reading in symbols */
2130 stabsread_init ();
2131 scoped_free_pendings free_pending;
2133 symbol_size = SYMBOL_SIZE (pst);
2134
2135 /* Read in this file's symbols. */
2136 bfd_seek (objfile->obfd.get (), SYMBOL_OFFSET (pst), SEEK_SET);
2138 }
2139
2140 pst->readin = true;
2141}
2142
2143/* Read in all of the symbols for a given psymtab for real.
2144 Be verbose about it if the user wants that. SELF is not NULL. */
2145
2146static void
2148{
2149 gdb_assert (!self->readin);
2150
2151 if (LDSYMLEN (self) || self->number_of_dependencies)
2152 {
2154
2155 {
2156 scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data);
2157 gdb::unique_xmalloc_ptr<gdb_byte> data_holder;
2159 {
2163 NULL);
2164 data_holder.reset (stabs_data);
2165 }
2166
2167 self->expand_psymtab (objfile);
2168 }
2169
2170 /* Match with global symbols. This only needs to be done once,
2171 after all of the symtabs and dependencies have been read in. */
2173 }
2174}
2175
2176/* Read in a defined section of a specific object file's symbols. */
2177
2178static void
2180{
2181 const char *namestring;
2182 struct external_nlist *bufp;
2183 struct internal_nlist nlist;
2184 unsigned char type;
2185 unsigned max_symnum;
2186 bfd *abfd;
2187 int sym_offset; /* Offset to start of symbols to read */
2188 int sym_size; /* Size of symbols to read */
2189 CORE_ADDR text_offset; /* Start of text segment for symbols */
2190 int text_size; /* Size of text segment for symbols */
2191
2192 sym_offset = LDSYMOFF (pst);
2193 sym_size = LDSYMLEN (pst);
2194 text_offset = pst->text_low (objfile);
2195 text_size = pst->text_high (objfile) - pst->text_low (objfile);
2197
2199
2201 set_last_source_file (NULL);
2202
2203 abfd = objfile->obfd.get ();
2204 symfile_bfd = objfile->obfd.get (); /* Implicit param to next_text_symbol. */
2205 symbuf_end = symbuf_idx = 0;
2206 symbuf_read = 0;
2207 symbuf_left = sym_offset + sym_size;
2208
2209 /* It is necessary to actually read one symbol *before* the start
2210 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2211 occurs before the N_SO symbol.
2212
2213 Detecting this in read_dbx_symtab
2214 would slow down initial readin, so we look for it here instead. */
2215 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2216 {
2217 stabs_seek (sym_offset - symbol_size);
2218 fill_symbuf (abfd);
2219 bufp = &symbuf[symbuf_idx++];
2220 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2221 OBJSTAT (objfile, n_stabs++);
2222
2223 namestring = set_namestring (objfile, &nlist);
2224
2226 if (nlist.n_type == N_TEXT)
2227 {
2228 const char *tempstring = namestring;
2229
2230 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2232 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2234 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2235 ++tempstring;
2236 if (startswith (tempstring, "__gnu_compiled"))
2238 }
2239 }
2240 else
2241 {
2242 /* The N_SO starting this symtab is the first symbol, so we
2243 better not check the symbol before it. I'm not this can
2244 happen, but it doesn't hurt to check for it. */
2245 stabs_seek (sym_offset);
2247 }
2248
2249 if (symbuf_idx == symbuf_end)
2250 fill_symbuf (abfd);
2251 bufp = &symbuf[symbuf_idx];
2252 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2253 error (_("First symbol in segment of executable not a source symbol"));
2254
2255 max_symnum = sym_size / symbol_size;
2256
2257 for (symnum = 0;
2258 symnum < max_symnum;
2259 symnum++)
2260 {
2261 QUIT; /* Allow this to be interruptable. */
2262 if (symbuf_idx == symbuf_end)
2263 fill_symbuf (abfd);
2264 bufp = &symbuf[symbuf_idx++];
2265 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2266 OBJSTAT (objfile, n_stabs++);
2267
2268 type = bfd_h_get_8 (abfd, bufp->e_type);
2269
2270 namestring = set_namestring (objfile, &nlist);
2271
2272 if (type & N_STAB)
2273 {
2274 if (sizeof (nlist.n_value) > 4
2275 /* We are a 64-bit debugger debugging a 32-bit program. */
2276 && (type == N_LSYM || type == N_PSYM))
2277 /* We have to be careful with the n_value in the case of N_LSYM
2278 and N_PSYM entries, because they are signed offsets from frame
2279 pointer, but we actually read them as unsigned 32-bit values.
2280 This is not a problem for 32-bit debuggers, for which negative
2281 values end up being interpreted correctly (as negative
2282 offsets) due to integer overflow.
2283 But we need to sign-extend the value for 64-bit debuggers,
2284 or we'll end up interpreting negative values as very large
2285 positive offsets. */
2286 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2287 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2288 namestring, section_offsets, objfile,
2289 PST_LANGUAGE (pst));
2290 }
2291 /* We skip checking for a new .o or -l file; that should never
2292 happen in this routine. */
2293 else if (type == N_TEXT)
2294 {
2295 /* I don't think this code will ever be executed, because
2296 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2297 the N_SO symbol which starts this source file.
2298 However, there is no reason not to accept
2299 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2300
2301 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2303 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2305 }
2306 else if (type & N_EXT || type == (unsigned char) N_TEXT
2307 || type == (unsigned char) N_NBTEXT)
2308 {
2309 /* Global symbol: see if we came across a dbx definition for
2310 a corresponding symbol. If so, store the value. Remove
2311 syms from the chain when their values are stored, but
2312 search the whole chain, as there may be several syms from
2313 different files with the same name. */
2314 /* This is probably not true. Since the files will be read
2315 in one at a time, each reference to a global symbol will
2316 be satisfied in each file as it appears. So we skip this
2317 section. */
2318 ;
2319 }
2320 }
2321
2322 /* In a Solaris elf file, this variable, which comes from the value
2323 of the N_SO symbol, will still be 0. Luckily, text_offset, which
2324 comes from low text address of PST, is correct. */
2325 if (get_last_source_start_addr () == 0)
2326 set_last_source_start_addr (text_offset);
2327
2328 /* In reordered executables last_source_start_addr may not be the
2329 lower bound for this symtab, instead use text_offset which comes
2330 from the low text address of PST, which is correct. */
2331 if (get_last_source_start_addr () > text_offset)
2332 set_last_source_start_addr (text_offset);
2333
2334 pst->compunit_symtab = end_compunit_symtab (text_offset + text_size,
2336
2337 end_stabs ();
2338
2339 dbxread_objfile = NULL;
2340}
2341
2342
2343/* Record the namespace that the function defined by SYMBOL was
2344 defined in, if necessary. BLOCK is the associated block; use
2345 OBSTACK for allocation. */
2346
2347static void
2349 struct block *block,
2350 struct obstack *obstack)
2351{
2352 if (symbol->demangled_name () != NULL)
2353 {
2354 /* Try to figure out the appropriate namespace from the
2355 demangled name. */
2356
2357 /* FIXME: carlton/2003-04-15: If the function in question is
2358 a method of a class, the name will actually include the
2359 name of the class as well. This should be harmless, but
2360 is a little unfortunate. */
2361
2362 const char *name = symbol->demangled_name ();
2363 unsigned int prefix_len = cp_entire_prefix_len (name);
2364
2365 block_set_scope (block, obstack_strndup (obstack, name, prefix_len),
2366 obstack);
2367 }
2368}
2369
2370/* This handles a single symbol from the symbol-file, building symbols
2371 into a GDB symtab. It takes these arguments and an implicit argument.
2372
2373 TYPE is the type field of the ".stab" symbol entry.
2374 DESC is the desc field of the ".stab" entry.
2375 VALU is the value field of the ".stab" entry.
2376 NAME is the symbol name, in our address space.
2377 SECTION_OFFSETS is a set of amounts by which the sections of this
2378 object file were relocated when it was loaded into memory. Note
2379 that these section_offsets are not the objfile->section_offsets but
2380 the pst->section_offsets. All symbols that refer to memory
2381 locations need to be offset by these amounts.
2382 OBJFILE is the object file from which we are reading symbols. It
2383 is used in end_compunit_symtab.
2384 LANGUAGE is the language of the symtab.
2385*/
2386
2387void
2388process_one_symbol (int type, int desc, CORE_ADDR valu, const char *name,
2390 struct objfile *objfile, enum language language)
2391{
2392 struct gdbarch *gdbarch = objfile->arch ();
2393 struct context_stack *newobj;
2394 struct context_stack cstk;
2395 /* This remembers the address of the start of a function. It is
2396 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2397 are relative to the current function's start address. On systems
2398 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2399 and is used to relocate these symbol types rather than
2400 SECTION_OFFSETS. */
2401 static CORE_ADDR function_start_offset;
2402
2403 /* This holds the address of the start of a function, without the
2404 system peculiarities of function_start_offset. */
2405 static CORE_ADDR last_function_start;
2406
2407 /* If this is nonzero, we've seen an N_SLINE since the start of the
2408 current function. We use this to tell us to move the first sline
2409 to the beginning of the function regardless of what its given
2410 value is. */
2411 static int sline_found_in_function = 1;
2412
2413 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2414 source file. Used to detect the SunPRO solaris compiler. */
2415 static int n_opt_found;
2416
2417 /* Something is wrong if we see real data before seeing a source
2418 file name. */
2419
2420 if (get_last_source_file () == NULL && type != (unsigned char) N_SO)
2421 {
2422 /* Ignore any symbols which appear before an N_SO symbol.
2423 Currently no one puts symbols there, but we should deal
2424 gracefully with the case. A complain()t might be in order,
2425 but this should not be an error (). */
2426 return;
2427 }
2428
2429 switch (type)
2430 {
2431 case N_FUN:
2432 case N_FNAME:
2433
2434 if (*name == '\000')
2435 {
2436 /* This N_FUN marks the end of a function. This closes off
2437 the current block. */
2438 struct block *block;
2439
2440 if (outermost_context_p ())
2441 {
2443 break;
2444 }
2445
2446 /* The following check is added before recording line 0 at
2447 end of function so as to handle hand-generated stabs
2448 which may have an N_FUN stabs at the end of the function,
2449 but no N_SLINE stabs. */
2450 if (sline_found_in_function)
2451 {
2452 CORE_ADDR addr = last_function_start + valu;
2453
2456 }
2457
2458 within_function = 0;
2459 cstk = pop_context ();
2460
2461 /* Make a block for the local symbols within. */
2462 block = finish_block (cstk.name,
2463 cstk.old_blocks, NULL,
2464 cstk.start_addr, cstk.start_addr + valu);
2465
2466 /* For C++, set the block's scope. */
2467 if (cstk.name->language () == language_cplus)
2469
2470 /* May be switching to an assembler file which may not be using
2471 block relative stabs, so reset the offset. */
2472 function_start_offset = 0;
2473
2474 break;
2475 }
2476
2477 sline_found_in_function = 0;
2478
2479 /* Relocate for dynamic loading. */
2481 valu = gdbarch_addr_bits_remove (gdbarch, valu);
2482 last_function_start = valu;
2483
2484 goto define_a_symbol;
2485
2486 case N_LBRAC:
2487 /* This "symbol" just indicates the start of an inner lexical
2488 context within a function. */
2489
2490 /* Ignore extra outermost context from SunPRO cc and acc. */
2491 if (n_opt_found && desc == 1)
2492 break;
2493
2494 valu += function_start_offset;
2495
2496 push_context (desc, valu);
2497 break;
2498
2499 case N_RBRAC:
2500 /* This "symbol" just indicates the end of an inner lexical
2501 context that was started with N_LBRAC. */
2502
2503 /* Ignore extra outermost context from SunPRO cc and acc. */
2504 if (n_opt_found && desc == 1)
2505 break;
2506
2507 valu += function_start_offset;
2508
2509 if (outermost_context_p ())
2510 {
2512 break;
2513 }
2514
2515 cstk = pop_context ();
2516 if (desc != cstk.depth)
2518
2519 if (*get_local_symbols () != NULL)
2520 {
2521 /* GCC development snapshots from March to December of
2522 2000 would output N_LSYM entries after N_LBRAC
2523 entries. As a consequence, these symbols are simply
2524 discarded. Complain if this is the case. */
2525 complaint (_("misplaced N_LBRAC entry; discarding local "
2526 "symbols which have no enclosing block"));
2527 }
2528 *get_local_symbols () = cstk.locals;
2529
2530 if (get_context_stack_depth () > 1)
2531 {
2532 /* This is not the outermost LBRAC...RBRAC pair in the
2533 function, its local symbols preceded it, and are the ones
2534 just recovered from the context stack. Define the block
2535 for them (but don't bother if the block contains no
2536 symbols. Should we complain on blocks without symbols?
2537 I can't think of any useful purpose for them). */
2538 if (*get_local_symbols () != NULL)
2539 {
2540 /* Muzzle a compiler bug that makes end < start.
2541
2542 ??? Which compilers? Is this ever harmful?. */
2543 if (cstk.start_addr > valu)
2544 {
2545 complaint (_("block start larger than block end"));
2546 cstk.start_addr = valu;
2547 }
2548 /* Make a block for the local symbols within. */
2549 finish_block (0, cstk.old_blocks, NULL,
2550 cstk.start_addr, valu);
2551 }
2552 }
2553 else
2554 {
2555 /* This is the outermost LBRAC...RBRAC pair. There is no
2556 need to do anything; leave the symbols that preceded it
2557 to be attached to the function's own block. We need to
2558 indicate that we just moved outside of the function. */
2559 within_function = 0;
2560 }
2561
2562 break;
2563
2564 case N_FN:
2565 case N_FN_SEQ:
2566 /* This kind of symbol indicates the start of an object file.
2567 Relocate for dynamic loading. */
2569 break;
2570
2571 case N_SO:
2572 /* This type of symbol indicates the start of data for one
2573 source file. Finish the symbol table of the previous source
2574 file (if any) and start accumulating a new symbol table.
2575 Relocate for dynamic loading. */
2577
2578 n_opt_found = 0;
2579
2580 if (get_last_source_file ())
2581 {
2582 /* Check if previous symbol was also an N_SO (with some
2583 sanity checks). If so, that one was actually the
2584 directory name, and the current one is the real file
2585 name. Patch things up. */
2586 if (previous_stab_code == (unsigned char) N_SO)
2587 {
2589 break; /* Ignore repeated SOs. */
2590 }
2592 end_stabs ();
2593 }
2594
2595 /* Null name means this just marks the end of text for this .o
2596 file. Don't start a new symtab in this case. */
2597 if (*name == '\000')
2598 break;
2599
2600 function_start_offset = 0;
2601
2602 start_stabs ();
2604 record_debugformat ("stabs");
2605 break;
2606
2607 case N_SOL:
2608 /* This type of symbol indicates the start of data for a
2609 sub-source-file, one whose contents were copied or included
2610 in the compilation of the main source file (whose name was
2611 given in the N_SO symbol). Relocate for dynamic loading. */
2614 break;
2615
2616 case N_BINCL:
2617 push_subfile ();
2618 add_new_header_file (name, valu);
2620 break;
2621
2622 case N_EINCL:
2624 break;
2625
2626 case N_EXCL:
2627 add_old_header_file (name, valu);
2628 break;
2629
2630 case N_SLINE:
2631 /* This type of "symbol" really just records one line-number --
2632 core-address correspondence. Enter it in the line list for
2633 this symbol table. */
2634
2635 /* Relocate for dynamic loading and for ELF acc
2636 function-relative symbols. */
2637 valu += function_start_offset;
2638
2639 /* GCC 2.95.3 emits the first N_SLINE stab somewhere in the
2640 middle of the prologue instead of right at the start of the
2641 function. To deal with this we record the address for the
2642 first N_SLINE stab to be the start of the function instead of
2643 the listed location. We really shouldn't to this. When
2644 compiling with optimization, this first N_SLINE stab might be
2645 optimized away. Other (non-GCC) compilers don't emit this
2646 stab at all. There is no real harm in having an extra
2647 numbered line, although it can be a bit annoying for the
2648 user. However, it totally screws up our testsuite.
2649
2650 So for now, keep adjusting the address of the first N_SLINE
2651 stab, but only for code compiled with GCC. */
2652
2653 if (within_function && sline_found_in_function == 0)
2654 {
2655 CORE_ADDR addr = processing_gcc_compilation == 2 ?
2656 last_function_start : valu;
2657
2660 sline_found_in_function = 1;
2661 }
2662 else
2665 break;
2666
2667 case N_BCOMM:
2669 break;
2670
2671 case N_ECOMM:
2673 break;
2674
2675 /* The following symbol types need to have the appropriate
2676 offset added to their value; then we process symbol
2677 definitions in the name. */
2678
2679 case N_STSYM: /* Static symbol in data segment. */
2680 case N_LCSYM: /* Static symbol in BSS segment. */
2681 case N_ROSYM: /* Static symbol in read-only data segment. */
2682 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2683 Solaris 2's stabs-in-elf makes *most* symbols relative but
2684 leaves a few absolute (at least for Solaris 2.1 and version
2685 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2686 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2687 relocates it) .stab "foo:V...",N_STSYM is relative (section
2688 base subtracted). This leaves us no choice but to search for
2689 the 'S' or 'V'... (or pass the whole section_offsets stuff
2690 down ONE MORE function call level, which we really don't want
2691 to do). */
2692 {
2693 const char *p;
2694
2695 /* Normal object file and NLMs have non-zero text seg offsets,
2696 but don't need their static syms offset in this fashion.
2697 XXX - This is really a crock that should be fixed in the
2698 solib handling code so that I don't have to work around it
2699 here. */
2700
2702 {
2703 p = strchr (name, ':');
2704 if (p != 0 && p[1] == 'S')
2705 {
2706 /* The linker relocated it. We don't want to add a
2707 Sun-stabs Tfoo.foo-like offset, but we *do*
2708 want to add whatever solib.c passed to
2709 symbol_file_add as addr (this is known to affect
2710 SunOS 4, and I suspect ELF too). Since there is no
2711 Ttext.text symbol, we can get addr from the text offset. */
2713 goto define_a_symbol;
2714 }
2715 }
2716 /* Since it's not the kludge case, re-dispatch to the right
2717 handler. */
2718 switch (type)
2719 {
2720 case N_STSYM:
2721 goto case_N_STSYM;
2722 case N_LCSYM:
2723 goto case_N_LCSYM;
2724 case N_ROSYM:
2725 goto case_N_ROSYM;
2726 default:
2727 internal_error (_("failed internal consistency check"));
2728 }
2729 }
2730
2731 case_N_STSYM: /* Static symbol in data segment. */
2732 case N_DSLINE: /* Source line number, data segment. */
2734 goto define_a_symbol;
2735
2736 case_N_LCSYM: /* Static symbol in BSS segment. */
2737 case N_BSLINE: /* Source line number, BSS segment. */
2738 /* N_BROWS: overlaps with N_BSLINE. */
2740 goto define_a_symbol;
2741
2742 case_N_ROSYM: /* Static symbol in read-only data segment. */
2744 goto define_a_symbol;
2745
2746 case N_ENTRY: /* Alternate entry point. */
2747 /* Relocate for dynamic loading. */
2749 goto define_a_symbol;
2750
2751 /* The following symbol types we don't know how to process.
2752 Handle them in a "default" way, but complain to people who
2753 care. */
2754 default:
2755 case N_CATCH: /* Exception handler catcher. */
2756 case N_EHDECL: /* Exception handler name. */
2757 case N_PC: /* Global symbol in Pascal. */
2758 case N_M2C: /* Modula-2 compilation unit. */
2759 /* N_MOD2: overlaps with N_EHDECL. */
2760 case N_SCOPE: /* Modula-2 scope information. */
2761 case N_ECOML: /* End common (local name). */
2762 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
2763 case N_NBDATA:
2764 case N_NBBSS:
2765 case N_NBSTS:
2766 case N_NBLCS:
2767 unknown_symtype_complaint (hex_string (type));
2768 /* FALLTHROUGH */
2769
2770 define_a_symbol:
2771 /* These symbol types don't need the address field relocated,
2772 since it is either unused, or is absolute. */
2773 case N_GSYM: /* Global variable. */
2774 case N_NSYMS: /* Number of symbols (Ultrix). */
2775 case N_NOMAP: /* No map? (Ultrix). */
2776 case N_RSYM: /* Register variable. */
2777 case N_DEFD: /* Modula-2 GNU module dependency. */
2778 case N_SSYM: /* Struct or union element. */
2779 case N_LSYM: /* Local symbol in stack. */
2780 case N_PSYM: /* Parameter variable. */
2781 case N_LENG: /* Length of preceding symbol type. */
2782 if (name)
2783 {
2784 int deftype;
2785 const char *colon_pos = strchr (name, ':');
2786
2787 if (colon_pos == NULL)
2788 deftype = '\0';
2789 else
2790 deftype = colon_pos[1];
2791
2792 switch (deftype)
2793 {
2794 case 'f':
2795 case 'F':
2796 /* Deal with the SunPRO 3.0 compiler which omits the
2797 address from N_FUN symbols. */
2798 if (type == N_FUN
2801 {
2804 objfile);
2805 if (minsym.minsym != NULL)
2806 valu = minsym.value_address ();
2807 }
2808
2809 /* These addresses are absolute. */
2810 function_start_offset = valu;
2811
2812 within_function = 1;
2813
2814 if (get_context_stack_depth () > 1)
2815 {
2816 complaint (_("unmatched N_LBRAC before symtab pos %d"),
2817 symnum);
2818 break;
2819 }
2820
2821 if (!outermost_context_p ())
2822 {
2823 struct block *block;
2824
2825 cstk = pop_context ();
2826 /* Make a block for the local symbols within. */
2827 block = finish_block (cstk.name,
2828 cstk.old_blocks, NULL,
2829 cstk.start_addr, valu);
2830
2831 /* For C++, set the block's scope. */
2832 if (cstk.name->language () == language_cplus)
2835 }
2836
2837 newobj = push_context (0, valu);
2838 newobj->name = define_symbol (valu, name, desc, type, objfile);
2839 break;
2840
2841 default:
2842 define_symbol (valu, name, desc, type, objfile);
2843 break;
2844 }
2845 }
2846 break;
2847
2848 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2849 for a bunch of other flags, too. Someday we may parse their
2850 flags; for now we ignore theirs and hope they'll ignore ours. */
2851 case N_OPT: /* Solaris 2: Compiler options. */
2852 if (name)
2853 {
2854 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2855 {
2857 }
2858 else
2859 n_opt_found = 1;
2860 }
2861 break;
2862
2863 case N_MAIN: /* Name of main routine. */
2864 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2865 it with a symbol file with "main" and without N_MAIN. I'm
2866 not sure exactly what rule to follow but probably something
2867 like: N_MAIN takes precedence over "main" no matter what
2868 objfile it is in; If there is more than one N_MAIN, choose
2869 the one in the symfile_objfile; If there is more than one
2870 N_MAIN within a given objfile, complain() and choose
2871 arbitrarily. (kingdon) */
2872 if (name != NULL)
2874 break;
2875
2876 /* The following symbol types can be ignored. */
2877 case N_OBJ: /* Solaris 2: Object file dir and name. */
2878 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
2879 /* N_UNDF: Solaris 2: File separator mark. */
2880 /* N_UNDF: -- we will never encounter it, since we only process
2881 one file's symbols at once. */
2882 case N_ENDM: /* Solaris 2: End of module. */
2883 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2884 break;
2885 }
2886
2887 /* '#' is a GNU C extension to allow one symbol to refer to another
2888 related symbol.
2889
2890 Generally this is used so that an alias can refer to its main
2891 symbol. */
2892 gdb_assert (name);
2893 if (name[0] == '#')
2894 {
2895 /* Initialize symbol reference names and determine if this is a
2896 definition. If a symbol reference is being defined, go ahead
2897 and add it. Otherwise, just return. */
2898
2899 const char *s = name;
2900 int refnum;
2901
2902 /* If this stab defines a new reference ID that is not on the
2903 reference list, then put it on the reference list.
2904
2905 We go ahead and advance NAME past the reference, even though
2906 it is not strictly necessary at this time. */
2907 refnum = symbol_reference_defined (&s);
2908 if (refnum >= 0)
2909 if (!ref_search (refnum))
2910 ref_add (refnum, 0, name, valu);
2911 name = s;
2912 }
2913
2915}
2916
2917/* FIXME: The only difference between this and elfstab_build_psymtabs
2918 is the call to install_minimal_symbols for elf, and the support for
2919 split sections. If the differences are really that small, the code
2920 should be shared. */
2921
2922/* Scan and build partial symbols for an coff symbol file.
2923 The coff file has already been processed to get its minimal symbols.
2924
2925 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2926 rolled into one.
2927
2928 OBJFILE is the object file we are reading symbols from.
2929 ADDR is the address relative to which the symbols are (e.g.
2930 the base address of the text segment).
2931 TEXTADDR is the address of the text section.
2932 TEXTSIZE is the size of the text section.
2933 STABSECTS is the list of .stab sections in OBJFILE.
2934 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2935 .stabstr section exists.
2936
2937 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2938 adjusted for coff details. */
2939
2940void
2942 CORE_ADDR textaddr, unsigned int textsize,
2943 const std::vector<asection *> &stabsects,
2944 file_ptr stabstroffset, unsigned int stabstrsize)
2945{
2946 int val;
2947 bfd *sym_bfd = objfile->obfd.get ();
2948 const char *name = bfd_get_filename (sym_bfd);
2949 unsigned int stabsize;
2950
2951 /* Allocate struct to keep track of stab reading. */
2952 dbx_objfile_data_key.emplace (objfile);
2953
2954 DBX_TEXT_ADDR (objfile) = textaddr;
2955 DBX_TEXT_SIZE (objfile) = textsize;
2956
2957#define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2959 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
2960
2961 if (stabstrsize > bfd_get_size (sym_bfd))
2962 error (_("ridiculous string table size: %d bytes"), stabstrsize);
2963 DBX_STRINGTAB (objfile) = (char *)
2964 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
2965 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
2966
2967 /* Now read in the string table in one big gulp. */
2968
2969 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
2970 if (val < 0)
2972 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
2973 if (val != stabstrsize)
2975
2979
2981
2982 /* In a coff file, we've already installed the minimal symbols that came
2983 from the coff (non-stab) symbol table, so always act like an
2984 incremental load here. */
2985 scoped_restore save_symbuf_sections
2986 = make_scoped_restore (&symbuf_sections);
2987 if (stabsects.size () == 1)
2988 {
2989 stabsize = bfd_section_size (stabsects[0]);
2991 DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos;
2992 }
2993 else
2994 {
2995 DBX_SYMCOUNT (objfile) = 0;
2996 for (asection *section : stabsects)
2997 {
2998 stabsize = bfd_section_size (section);
2999 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3000 }
3001
3002 DBX_SYMTAB_OFFSET (objfile) = stabsects[0]->filepos;
3003
3004 sect_idx = 1;
3005 symbuf_sections = &stabsects;
3006 symbuf_left = bfd_section_size (stabsects[0]);
3007 symbuf_read = 0;
3008 }
3009
3011}
3012
3013/* Scan and build partial symbols for an ELF symbol file.
3014 This ELF file has already been processed to get its minimal symbols.
3015
3016 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3017 rolled into one.
3018
3019 OBJFILE is the object file we are reading symbols from.
3020 ADDR is the address relative to which the symbols are (e.g.
3021 the base address of the text segment).
3022 STABSECT is the BFD section information for the .stab section.
3023 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3024 .stabstr section exists.
3025
3026 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3027 adjusted for elf details. */
3028
3029void
3030elfstab_build_psymtabs (struct objfile *objfile, asection *stabsect,
3031 file_ptr stabstroffset, unsigned int stabstrsize)
3032{
3033 int val;
3034 bfd *sym_bfd = objfile->obfd.get ();
3035 const char *name = bfd_get_filename (sym_bfd);
3036
3038
3039 /* Allocate struct to keep track of stab reading. */
3040 dbx_objfile_data_key.emplace (objfile);
3041
3042 /* Find the first and last text address. dbx_symfile_read seems to
3043 want this. */
3044 find_text_range (sym_bfd, objfile);
3045
3046#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3049 = bfd_section_size (stabsect) / DBX_SYMBOL_SIZE (objfile);
3050 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3051 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3052 DBX_STAB_SECTION (objfile) = stabsect;
3053
3054 if (stabstrsize > bfd_get_size (sym_bfd))
3055 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3056 DBX_STRINGTAB (objfile) = (char *)
3057 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3058 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3059
3060 /* Now read in the string table in one big gulp. */
3061
3062 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3063 if (val < 0)
3065 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3066 if (val != stabstrsize)
3068
3072
3074
3075 symbuf_read = 0;
3076 symbuf_left = bfd_section_size (stabsect);
3077
3078 scoped_restore restore_stabs_data = make_scoped_restore (&stabs_data);
3079 gdb::unique_xmalloc_ptr<gdb_byte> data_holder;
3080
3082 if (stabs_data)
3083 data_holder.reset (stabs_data);
3084
3085 /* In an elf file, we've already installed the minimal symbols that came
3086 from the elf (non-stab) symbol table, so always act like an
3087 incremental load here. dbx_symfile_read should not generate any new
3088 minimal symbols, since we will have already read the ELF dynamic symbol
3089 table and normal symbol entries won't be in the ".stab" section; but in
3090 case it does, it will install them itself. */
3092}
3093
3094/* Scan and build partial symbols for a file with special sections for stabs
3095 and stabstrings. The file has already been processed to get its minimal
3096 symbols, and any other symbols that might be necessary to resolve GSYMs.
3097
3098 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3099 rolled into one.
3100
3101 OBJFILE is the object file we are reading symbols from.
3102 ADDR is the address relative to which the symbols are (e.g. the base address
3103 of the text segment).
3104 STAB_NAME is the name of the section that contains the stabs.
3105 STABSTR_NAME is the name of the section that contains the stab strings.
3106
3107 This routine is mostly copied from dbx_symfile_init and
3108 dbx_symfile_read. */
3109
3110void
3111stabsect_build_psymtabs (struct objfile *objfile, char *stab_name,
3112 char *stabstr_name, char *text_name)
3113{
3114 int val;
3115 bfd *sym_bfd = objfile->obfd.get ();
3116 const char *name = bfd_get_filename (sym_bfd);
3117 asection *stabsect;
3118 asection *stabstrsect;
3119 asection *text_sect;
3120
3121 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3122 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3123
3124 if (!stabsect)
3125 return;
3126
3127 if (!stabstrsect)
3128 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3129 "but not string section (%s)"),
3130 stab_name, stabstr_name);
3131
3132 dbx_objfile_data_key.emplace (objfile);
3133
3134 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3135 if (!text_sect)
3136 error (_("Can't find %s section in symbol file"), text_name);
3137 DBX_TEXT_ADDR (objfile) = bfd_section_vma (text_sect);
3138 DBX_TEXT_SIZE (objfile) = bfd_section_size (text_sect);
3139
3140 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3141 DBX_SYMCOUNT (objfile) = bfd_section_size (stabsect)
3143 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (stabstrsect);
3144 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING
3145 INSIDE BFD DATA
3146 STRUCTURES */
3147
3148 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3149 error (_("ridiculous string table size: %d bytes"),
3151 DBX_STRINGTAB (objfile) = (char *)
3152 obstack_alloc (&objfile->objfile_obstack,
3154 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3155
3156 /* Now read in the string table in one big gulp. */
3157
3158 val = bfd_get_section_contents (sym_bfd, /* bfd */
3159 stabstrsect, /* bfd section */
3160 DBX_STRINGTAB (objfile), /* input buffer */
3161 0, /* offset into section */
3162 DBX_STRINGTAB_SIZE (objfile)); /* amount to
3163 read */
3164
3165 if (!val)
3167
3171
3172 /* Now, do an incremental load. */
3173
3176}
3177
3178static const struct sym_fns aout_sym_fns =
3179{
3180 dbx_new_init, /* init anything gbl to entire symtab */
3181 dbx_symfile_init, /* read initial info, setup for sym_read() */
3182 dbx_symfile_read, /* read a symbol file into symtab */
3183 dbx_symfile_finish, /* finished with file, cleanup */
3184 default_symfile_offsets, /* parse user's offsets to internal form */
3185 default_symfile_segments, /* Get segment information from a file. */
3186 NULL,
3187 default_symfile_relocate, /* Relocate a debug section. */
3188 NULL, /* sym_probe_fns */
3189};
3190
3191void _initialize_dbxread ();
3192void
3194{
3195 add_symtab_fns (bfd_target_aout_flavour, &aout_sym_fns);
3196}
const char *const name
void * xmalloc(YYSIZE_T)
void xfree(void *)
void * xrealloc(void *ptr, size_t size)
Definition alloc.c:65
void f()
Definition 1.cc:36
void block_set_scope(struct block *block, const char *scope, struct obstack *obstack)
Definition block.c:313
void set_last_source_start_addr(CORE_ADDR addr)
struct context_stack * push_context(int desc, CORE_ADDR valu)
struct block * finish_block(struct symbol *symbol, struct pending_block *old_blocks, const struct dynamic_prop *static_link, CORE_ADDR start, CORE_ADDR end)
struct compunit_symtab * start_compunit_symtab(struct objfile *objfile, const char *name, const char *comp_dir, CORE_ADDR start_addr, enum language language)
struct context_stack pop_context()
void push_subfile()
CORE_ADDR get_last_source_start_addr()
bool outermost_context_p()
struct compunit_symtab * end_compunit_symtab(CORE_ADDR end_addr, int section)
struct subfile * get_current_subfile()
void record_debugformat(const char *format)
void set_last_source_file(const char *name)
void record_line(struct subfile *subfile, int line, CORE_ADDR pc)
void patch_subfile_names(struct subfile *subfile, const char *name)
int get_context_stack_depth()
void start_subfile(const char *name)
const char * get_last_source_file()
struct pending ** get_local_symbols()
const char * pop_subfile()
gdb::unique_xmalloc_ptr< char > c_canonicalize_name(const char *name)
Definition c-lang.c:733
void record_with_info(const char *name, CORE_ADDR address, enum minimal_symbol_type ms_type, int section)
Definition minsyms.h:143
void discard_psymtab(struct partial_symtab *pst)
Definition psymtab.c:1364
partial_symtab_range range()
Definition psymtab.h:112
struct partial_symtab ** allocate_dependencies(int number)
Definition psymtab.h:97
#define complaint(FMT,...)
Definition complaints.h:47
int is_vtable_name(const char *name)
Definition cp-abi.c:52
unsigned int cp_entire_prefix_len(const char *name)
gdb::unique_xmalloc_ptr< char > cp_canonicalize_string(const char *string)
Definition cp-support.c:626
static CORE_ADDR lowest_text_address
Definition dbxread.c:160
static bfd * symfile_bfd
Definition dbxread.c:114
static void dbx_expand_psymtab(legacy_psymtab *, struct objfile *)
Definition dbxread.c:2120
void free_header_files(void)
Definition dbxread.c:304
void init_header_files(void)
Definition dbxread.c:317
#define INTERNALIZE_SYMBOL(intern, extern, abfd)
Definition dbxread.c:815
static char * stringtab_global
Definition dbxread.c:736
static void add_new_header_file(const char *, int)
Definition dbxread.c:372
static unsigned char processing_acc_compilation
Definition dbxread.c:151
#define PST_LANGUAGE(p)
Definition dbxread.c:101
static void repeated_header_complaint(const char *arg1, int arg2)
Definition dbxread.c:182
static int has_line_numbers
Definition dbxread.c:165
static void lbrac_mismatch_complaint(int arg1)
Definition dbxread.c:176
static unsigned symbol_table_offset
Definition dbxread.c:124
static size_t sect_idx
Definition dbxread.c:742
#define LDSYMOFF(p)
Definition dbxread.c:94
void coffstab_build_psymtabs(struct objfile *objfile, CORE_ADDR textaddr, unsigned int textsize, const std::vector< asection * > &stabsects, file_ptr stabstroffset, unsigned int stabstrsize)
Definition dbxread.c:2941
static unsigned int file_string_table_offset
Definition dbxread.c:136
static int symfile_relocatable
Definition dbxread.c:143
#define ELF_STABS_SYMBOL_SIZE
#define SYMBOL_TABLE_OFFSET
static const char * last_function_name
Definition dbxread.c:727
static unsigned int symbuf_left
Definition dbxread.c:743
static void add_this_object_header_file(int)
Definition dbxread.c:327
static const char * dbx_next_symbol_text(struct objfile *)
Definition dbxread.c:837
void elfstab_build_psymtabs(struct objfile *objfile, asection *stabsect, file_ptr stabstroffset, unsigned int stabstrsize)
Definition dbxread.c:3030
static void read_ofile_symtab(struct objfile *, legacy_psymtab *)
Definition dbxread.c:2179
static unsigned symbol_size
Definition dbxread.c:120
static void fill_symbuf(bfd *)
Definition dbxread.c:757
static enum language psymtab_language
Definition dbxread.c:110
static unsigned int next_file_string_table_offset
Definition dbxread.c:137
static void find_text_range(bfd *sym_bfd, struct objfile *objfile)
Definition dbxread.c:199
static legacy_psymtab * start_psymtab(psymtab_storage *, struct objfile *, const char *, CORE_ADDR, int)
Definition dbxread.c:1954
static struct external_nlist symbuf[4096]
Definition dbxread.c:721
static void dbx_new_init(struct objfile *)
Definition dbxread.c:561
static unsigned string_table_offset
Definition dbxread.c:128
#define DBX_STRINGTAB_SIZE_SIZE
Definition dbxread.c:581
static void stabs_seek(int sym_offset)
Definition dbxread.c:804
const registry< objfile >::key< dbx_symfile_info > dbx_objfile_data_key
Definition dbxread.c:61
static void unknown_symtype_complaint(const char *arg1)
Definition dbxread.c:170
static const struct sym_fns aout_sym_fns
Definition dbxread.c:3178
static const char * set_namestring(struct objfile *objfile, const struct internal_nlist *nlist)
Definition dbxread.c:875
static void add_old_header_file(const char *, int)
Definition dbxread.c:346
static unsigned int symbuf_read
Definition dbxread.c:744
void _initialize_dbxread()
Definition dbxread.c:3193
static void record_minimal_symbol(minimal_symbol_reader &, const char *, CORE_ADDR, int, struct objfile *)
Definition dbxread.c:430
static void dbx_read_symtab(legacy_psymtab *self, struct objfile *objfile)
Definition dbxread.c:2147
static void dbx_symfile_init(struct objfile *)
Definition dbxread.c:584
static struct objfile * dbxread_objfile
Definition dbxread.c:106
static std::vector< struct header_file_location > * bincl_list
Definition dbxread.c:259
#define SYMBOL_OFFSET(p)
Definition dbxread.c:98
static void dbx_symfile_finish(struct objfile *)
Definition dbxread.c:697
#define FILE_STRING_OFFSET(p)
Definition dbxread.c:100
static int symbuf_idx
Definition dbxread.c:722
#define STRING_OFFSET(p)
Definition dbxread.c:99
#define LDSYMLEN(p)
Definition dbxread.c:95
static bfd_byte * stabs_data
Definition dbxread.c:748
static struct bound_minimal_symbol find_stab_function(const char *namestring, const char *filename, struct objfile *objfile)
Definition dbxread.c:894
static void read_dbx_symtab(minimal_symbol_reader &, psymtab_storage *, struct objfile *)
Definition dbxread.c:950
static const std::vector< asection * > * symbuf_sections
Definition dbxread.c:741
static void dbx_symfile_read(struct objfile *, symfile_add_flags)
Definition dbxread.c:519
#define SYMBOL_SIZE(p)
Definition dbxread.c:97
void process_one_symbol(int type, int desc, CORE_ADDR valu, const char *name, const section_offsets &section_offsets, struct objfile *objfile, enum language language)
Definition dbxread.c:2388
static void function_outside_compilation_unit_complaint(const char *arg1)
Definition dbxread.c:939
static legacy_psymtab * find_corresponding_bincl_psymtab(const char *, int)
Definition dbxread.c:859
void stabsect_build_psymtabs(struct objfile *objfile, char *stab_name, char *stabstr_name, char *text_name)
Definition dbxread.c:3111
static int symbuf_end
Definition dbxread.c:723
static void cp_set_block_scope(const struct symbol *symbol, struct block *block, struct obstack *obstack)
Definition dbxread.c:2348
#define COFF_STABS_SYMBOL_SIZE
#define STRING_TABLE_OFFSET
legacy_psymtab * dbx_end_psymtab(struct objfile *objfile, psymtab_storage *partial_symtabs, legacy_psymtab *pst, const char **include_list, int num_includes, int capping_symbol_offset, CORE_ADDR capping_text, legacy_psymtab **dependency_list, int number_dependencies, int textlow_not_set)
Definition dbxread.c:1983
#define SEEK_SET
Definition defs.h:103
#define SEEK_CUR
Definition defs.h:106
language
Definition defs.h:211
@ language_unknown
Definition defs.h:212
@ language_cplus
Definition defs.h:216
@ language_c
Definition defs.h:214
#define QUIT
Definition defs.h:186
#define DBX_BSS_SECTION(o)
Definition gdb-stabs.h:75
#define DBX_TEXT_SECTION(o)
Definition gdb-stabs.h:73
#define DBX_STRINGTAB(o)
Definition gdb-stabs.h:69
#define DBX_TEXT_SIZE(o)
Definition gdb-stabs.h:67
#define DBX_SYMBOL_SIZE(o)
Definition gdb-stabs.h:72
#define DBX_SYMTAB_OFFSET(o)
Definition gdb-stabs.h:71
#define DBX_STRINGTAB_SIZE(o)
Definition gdb-stabs.h:70
#define DBX_TEXT_ADDR(o)
Definition gdb-stabs.h:66
#define DBX_SYMCOUNT(o)
Definition gdb-stabs.h:68
#define DBX_DATA_SECTION(o)
Definition gdb-stabs.h:74
#define DBX_STAB_SECTION(o)
Definition gdb-stabs.h:76
int gdbarch_sofun_address_maybe_missing(struct gdbarch *gdbarch)
Definition gdbarch.c:4231
CORE_ADDR gdbarch_addr_bits_remove(struct gdbarch *gdbarch, CORE_ADDR addr)
Definition gdbarch.c:3087
struct bound_minimal_symbol lookup_minimal_symbol(const char *name, const char *sfile, struct objfile *objf)
Definition minsyms.c:363
void set_objfile_main_name(struct objfile *objfile, const char *name, enum language lang)
Definition objfiles.c:152
const char * objfile_name(const struct objfile *objfile)
Definition objfiles.c:1308
#define SECT_OFF_BSS(objfile)
Definition objfiles.h:156
#define SECT_OFF_DATA(objfile)
Definition objfiles.h:138
#define SECT_OFF_RODATA(objfile)
Definition objfiles.h:143
#define SECT_OFF_TEXT(objfile)
Definition objfiles.h:148
#define OBJSTAT(objfile, expr)
Definition objfiles.h:178
int within_function
Definition stabsread.c:56
struct symbol * ref_search(int refnum)
Definition stabsread.c:564
void start_stabs(void)
Definition stabsread.c:4666
int symbol_reference_defined(const char **string)
Definition stabsread.c:600
void common_block_end(struct objfile *objfile)
Definition stabsread.c:4249
void stabsread_new_init(void)
Definition stabsread.c:4656
unsigned int symnum
Definition stabsread.c:53
struct symbol * define_symbol(CORE_ADDR valu, const char *string, int desc, int type, struct objfile *objfile)
Definition stabsread.c:649
int n_this_object_header_files
Definition stabsread.c:61
int * this_object_header_files
Definition stabsread.c:60
void scan_file_globals(struct objfile *objfile)
Definition stabsread.c:4515
const char *(* next_symbol_text_func)(struct objfile *)
Definition stabsread.c:54
unsigned char processing_gcc_compilation
Definition stabsread.c:55
void stabsread_init(void)
Definition stabsread.c:4647
int n_allocated_this_object_header_files
Definition stabsread.c:62
void common_block_start(const char *name, struct objfile *objfile)
Definition stabsread.c:4235
void end_stabs(void)
Definition stabsread.c:4682
void ref_add(int refnum, struct symbol *sym, const char *stabs, CORE_ADDR value)
Definition stabsread.c:540
int previous_stab_code
Definition stabsread.c:59
#define N_HEADER_FILES(OBJFILE)
Definition stabsread.h:131
#define next_symbol_text(objfile)
Definition stabsread.h:39
#define N_ALLOCATED_HEADER_FILES(OBJFILE)
Definition stabsread.h:134
#define HEADER_FILES(OBJFILE)
Definition stabsread.h:128
Definition block.h:109
struct objfile * objfile
Definition minsyms.h:54
struct minimal_symbol * minsym
Definition minsyms.h:49
struct pending * locals
Definition buildsym.h:91
struct pending_block * old_blocks
Definition buildsym.h:99
CORE_ADDR start_addr
Definition buildsym.h:112
struct symbol * name
Definition buildsym.h:103
struct header_file * header_files
Definition gdb-stabs.h:47
const char * demangled_name
Definition symtab.h:572
enum language language() const
Definition symtab.h:501
header_file_location(const char *name_, int instance_, legacy_psymtab *pst_)
Definition dbxread.c:244
const char * name
Definition dbxread.c:252
legacy_psymtab * pst
Definition dbxread.c:254
char * name
Definition stabsread.h:109
struct type ** vector
Definition stabsread.h:119
void expand_psymtab(struct objfile *objf) override
Definition psympriv.h:428
void * read_symtab_private
Definition psympriv.h:448
void(* legacy_expand_psymtab)(legacy_psymtab *, struct objfile *)
Definition psympriv.h:441
void(* legacy_read_symtab)(legacy_psymtab *, struct objfile *)
Definition psympriv.h:436
unsigned long size() const
Definition symtab.h:756
CORE_ADDR value_raw_address() const
Definition symtab.h:735
CORE_ADDR value_address(objfile *objfile) const
Definition symtab.c:421
int sect_index_data
Definition objfiles.h:712
struct gdbarch * arch() const
Definition objfiles.h:482
struct objfile_per_bfd_storage * per_bfd
Definition objfiles.h:657
gdb_bfd_ref_ptr obfd
Definition objfiles.h:653
auto_obstack objfile_obstack
Definition objfiles.h:673
std::forward_list< quick_symbol_functions_up > qf
Definition objfiles.h:685
::section_offsets section_offsets
Definition objfiles.h:699
struct partial_symtab ** dependencies
Definition psympriv.h:327
CORE_ADDR raw_text_low() const
Definition psympriv.h:175
unsigned int text_high_valid
Definition psympriv.h:357
const char * dirname
Definition psympriv.h:277
const char * filename
Definition psympriv.h:269
void set_text_low(CORE_ADDR addr)
Definition psympriv.h:199
int number_of_dependencies
Definition psympriv.h:329
CORE_ADDR text_high(struct objfile *objfile) const
Definition psympriv.h:193
void expand_dependencies(struct objfile *)
Definition psymtab.c:1340
void add_psymbol(gdb::string_view name, bool copy_name, domain_enum domain, enum address_class theclass, short section, psymbol_placement where, CORE_ADDR coreaddr, enum language language, psymtab_storage *partial_symtabs, struct objfile *objfile)
Definition psymtab.c:1280
bool empty() const
Definition psympriv.h:214
CORE_ADDR raw_text_high() const
Definition psympriv.h:181
void set_text_high(CORE_ADDR addr)
Definition psympriv.h:206
CORE_ADDR text_low(struct objfile *objfile) const
Definition psympriv.h:187
const std::shared_ptr< psymtab_storage > & get_partial_symtabs() const
Definition psympriv.h:556
struct compunit_symtab * compunit_symtab
Definition psympriv.h:398
int ldsymlen
Definition dbxread.c:79
int ldsymoff
Definition dbxread.c:71
int string_offset
Definition dbxread.c:89
int symbol_size
Definition dbxread.c:83
int file_string_offset
Definition dbxread.c:90
int symbol_offset
Definition dbxread.c:88
enum language pst_language
Definition dbxread.c:91
enum language deduce_language_from_filename(const char *filename)
Definition symfile.c:2759
bfd_byte * symfile_relocate_debug_section(struct objfile *objfile, asection *sectp, bfd_byte *buf)
Definition symfile.c:3599
void add_symtab_fns(enum bfd_flavour flavour, const struct sym_fns *sf)
Definition symfile.c:1768
void default_symfile_offsets(struct objfile *objfile, const section_addr_info &addrs)
Definition symfile.c:627
symfile_segment_data_up default_symfile_segments(bfd *abfd)
Definition symfile.c:713
bfd_byte * default_symfile_relocate(struct objfile *objfile, asection *sectp, bfd_byte *buf)
Definition symfile.c:3561
#define GCC_COMPILED_FLAG_SYMBOL
Definition symtab.h:2219
@ LOC_STATIC
Definition symtab.h:950
@ LOC_BLOCK
Definition symtab.h:999
@ LOC_CONST
Definition symtab.h:946
@ LOC_TYPEDEF
Definition symtab.h:989
#define GCC2_COMPILED_FLAG_SYMBOL
Definition symtab.h:2224
minimal_symbol_type
Definition symtab.h:653
@ mst_abs
Definition symtab.h:679
@ mst_bss
Definition symtab.h:678
@ mst_data
Definition symtab.h:677
@ mst_unknown
Definition symtab.h:654
@ mst_file_text
Definition symtab.h:691
@ mst_file_data
Definition symtab.h:692
@ mst_text
Definition symtab.h:655
@ mst_file_bss
Definition symtab.h:693
@ VAR_DOMAIN
Definition symtab.h:881
@ STRUCT_DOMAIN
Definition symtab.h:887
std::vector< CORE_ADDR > section_offsets
Definition symtab.h:1595
void perror_with_name(const char *string)
Definition utils.c:643
void gdb_printf(struct ui_file *stream, const char *format,...)
Definition utils.c:1865
#define gdb_stderr
Definition utils.h:193