1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
45 #include "gdb_obstack.h"
48 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed for local_hex_string */
59 #include "complaints.h"
61 #include "gdb_assert.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* Remember what we deduced to be the source language of this psymtab. */
108 static enum language psymtab_language = language_unknown;
110 /* The BFD for this file -- implicit parameter to next_symbol_text. */
112 static bfd *symfile_bfd;
114 /* The size of each symbol in the symbol file (in external form).
115 This is set by dbx_symfile_read when building psymtabs, and by
116 dbx_psymtab_to_symtab when building symtabs. */
118 static unsigned symbol_size;
120 /* This is the offset of the symbol table in the executable file. */
122 static unsigned symbol_table_offset;
124 /* This is the offset of the string table in the executable file. */
126 static unsigned string_table_offset;
128 /* For elf+stab executables, the n_strx field is not a simple index
129 into the string table. Instead, each .o file has a base offset in
130 the string table, and the associated symbols contain offsets from
131 this base. The following two variables contain the base offset for
132 the current and next .o files. */
134 static unsigned int file_string_table_offset;
135 static unsigned int next_file_string_table_offset;
137 /* .o and NLM files contain unrelocated addresses which are based at
138 0. When non-zero, this flag disables some of the special cases for
139 Solaris elf+stab text addresses at location 0. */
141 static int symfile_relocatable = 0;
143 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
144 relative to the function start address. */
146 static int block_address_function_relative = 0;
148 /* The lowest text address we have yet encountered. This is needed
149 because in an a.out file, there is no header field which tells us
150 what address the program is actually going to be loaded at, so we
151 need to make guesses based on the symbols (which *are* relocated to
152 reflect the address it will be loaded at). */
154 static CORE_ADDR lowest_text_address;
156 /* Non-zero if there is any line number info in the objfile. Prevents
157 end_psymtab from discarding an otherwise empty psymtab. */
159 static int has_line_numbers;
161 /* Complaints about the symbols we have encountered. */
164 unknown_symtype_complaint (const char *arg1)
166 complaint (&symfile_complaints, "unknown symbol type %s", arg1);
170 lbrac_mismatch_complaint (int arg1)
172 complaint (&symfile_complaints,
173 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1);
177 repeated_header_complaint (const char *arg1, int arg2)
179 complaint (&symfile_complaints,
180 "\"repeated\" header file %s not previously seen, at symtab pos %d",
184 /* find_text_range --- find start and end of loadable code sections
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
194 find_text_range (bfd * sym_bfd, struct objfile *objfile)
201 for (sec = sym_bfd->sections; sec; sec = sec->next)
202 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
204 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
205 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
209 if (sec_start < start)
224 error ("Can't find any code sections in symbol file");
226 DBX_TEXT_ADDR (objfile) = start;
227 DBX_TEXT_SIZE (objfile) = end - start;
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
237 struct header_file_location
239 char *name; /* Name of header file */
240 int instance; /* See above */
241 struct partial_symtab *pst; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
245 /* The actual list and controling variables */
246 static struct header_file_location *bincl_list, *next_bincl;
247 static int bincls_allocated;
249 /* Local function prototypes */
251 extern void _initialize_dbxread (void);
253 static void read_ofile_symtab (struct partial_symtab *);
255 static void dbx_psymtab_to_symtab (struct partial_symtab *);
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
259 static void read_dbx_dynamic_symtab (struct objfile *objfile);
261 static void read_dbx_symtab (struct objfile *);
263 static void free_bincl_list (struct objfile *);
265 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab *, char *, int);
269 static void init_bincl_list (int, struct objfile *);
271 static char *dbx_next_symbol_text (struct objfile *);
273 static void fill_symbuf (bfd *);
275 static void dbx_symfile_init (struct objfile *);
277 static void dbx_new_init (struct objfile *);
279 static void dbx_symfile_read (struct objfile *, int);
281 static void dbx_symfile_finish (struct objfile *);
283 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
285 static void add_new_header_file (char *, int);
287 static void add_old_header_file (char *, int);
289 static void add_this_object_header_file (int);
291 static struct partial_symtab *start_psymtab (struct objfile *, char *,
293 struct partial_symbol **,
294 struct partial_symbol **);
296 /* Free up old header file tables */
299 free_header_files (void)
301 if (this_object_header_files)
303 xfree (this_object_header_files);
304 this_object_header_files = NULL;
306 n_allocated_this_object_header_files = 0;
309 /* Allocate new header file tables */
312 init_header_files (void)
314 n_allocated_this_object_header_files = 10;
315 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
322 add_this_object_header_file (int i)
324 if (n_this_object_header_files == n_allocated_this_object_header_files)
326 n_allocated_this_object_header_files *= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files,
329 n_allocated_this_object_header_files * sizeof (int));
332 this_object_header_files[n_this_object_header_files++] = i;
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
341 add_old_header_file (char *name, int instance)
343 struct header_file *p = HEADER_FILES (current_objfile);
346 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
347 if (strcmp (p[i].name, name) == 0 && instance == p[i].instance)
349 add_this_object_header_file (i);
352 repeated_header_complaint (name, symnum);
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
367 add_new_header_file (char *name, int instance)
370 struct header_file *hfile;
372 /* Make sure there is room for one more header file. */
374 i = N_ALLOCATED_HEADER_FILES (current_objfile);
376 if (N_HEADER_FILES (current_objfile) == i)
380 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
381 HEADER_FILES (current_objfile) = (struct header_file *)
382 xmalloc (10 * sizeof (struct header_file));
387 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
388 HEADER_FILES (current_objfile) = (struct header_file *)
389 xrealloc ((char *) HEADER_FILES (current_objfile),
390 (i * sizeof (struct header_file)));
394 /* Create an entry for this header file. */
396 i = N_HEADER_FILES (current_objfile)++;
397 hfile = HEADER_FILES (current_objfile) + i;
398 hfile->name = savestring (name, strlen (name));
399 hfile->instance = instance;
402 = (struct type **) xmalloc (10 * sizeof (struct type *));
403 memset (hfile->vector, 0, 10 * sizeof (struct type *));
405 add_this_object_header_file (i);
409 static struct type **
410 explicit_lookup_type (int real_filenum, int index)
412 struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
414 if (index >= f->length)
417 f->vector = (struct type **)
418 xrealloc (f->vector, f->length * sizeof (struct type *));
419 memset (&f->vector[f->length / 2],
420 '\0', f->length * sizeof (struct type *) / 2);
422 return &f->vector[index];
427 record_minimal_symbol (char *name, CORE_ADDR address, int type,
428 struct objfile *objfile)
430 enum minimal_symbol_type ms_type;
432 asection *bfd_section;
438 section = SECT_OFF_TEXT (objfile);
439 bfd_section = DBX_TEXT_SECTION (objfile);
443 section = SECT_OFF_DATA (objfile);
444 bfd_section = DBX_DATA_SECTION (objfile);
448 section = SECT_OFF_BSS (objfile);
449 bfd_section = DBX_BSS_SECTION (objfile);
459 section = SECT_OFF_DATA (objfile);
460 bfd_section = DBX_DATA_SECTION (objfile);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type = mst_file_data;
467 section = SECT_OFF_DATA (objfile);
468 bfd_section = DBX_DATA_SECTION (objfile);
475 ms_type = mst_file_text;
476 section = SECT_OFF_TEXT (objfile);
477 bfd_section = DBX_TEXT_SECTION (objfile);
480 ms_type = mst_file_data;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name[8] == 'C' && DEPRECATED_STREQ ("__DYNAMIC", name))
489 /* Same with virtual function tables, both global and static. */
491 char *tempstring = name;
492 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
494 if (is_vtable_name (tempstring))
497 section = SECT_OFF_DATA (objfile);
498 bfd_section = DBX_DATA_SECTION (objfile);
501 ms_type = mst_file_bss;
502 section = SECT_OFF_BSS (objfile);
503 bfd_section = DBX_BSS_SECTION (objfile);
506 ms_type = mst_unknown;
512 if ((ms_type == mst_file_text || ms_type == mst_text)
513 && address < lowest_text_address)
514 lowest_text_address = address;
516 prim_record_minimal_symbol_and_info
517 (name, address, ms_type, NULL, section, bfd_section, objfile);
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
529 dbx_symfile_read (struct objfile *objfile, int mainline)
533 struct cleanup *back_to;
535 sym_bfd = objfile->obfd;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative =
548 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
555 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
557 perror_with_name (objfile->name);
559 /* If we are reinitializing, or if we have never loaded syms yet, init */
561 || (objfile->global_psymbols.size == 0
562 && objfile->static_psymbols.size == 0))
563 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
565 symbol_size = DBX_SYMBOL_SIZE (objfile);
566 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
568 free_pending_blocks ();
569 back_to = make_cleanup (really_free_pendings, 0);
571 init_minimal_symbol_collection ();
572 make_cleanup_discard_minimal_symbols ();
574 /* Read stabs data from executable file and define symbols. */
576 read_dbx_symtab (objfile);
578 /* Add the dynamic symbols. */
580 read_dbx_dynamic_symtab (objfile);
582 /* Install any minimal symbols that have been collected as the current
583 minimal symbols for this objfile. */
585 install_minimal_symbols (objfile);
587 do_cleanups (back_to);
590 /* Initialize anything that needs initializing when a completely new
591 symbol file is specified (not just adding some symbols from another
592 file, e.g. a shared library). */
595 dbx_new_init (struct objfile *ignore)
597 stabsread_new_init ();
598 buildsym_new_init ();
599 init_header_files ();
603 /* dbx_symfile_init ()
604 is the dbx-specific initialization routine for reading symbols.
605 It is passed a struct objfile which contains, among other things,
606 the BFD for the file whose symbols are being read, and a slot for a pointer
607 to "private data" which we fill with goodies.
609 We read the string table into malloc'd space and stash a pointer to it.
611 Since BFD doesn't know how to read debug symbols in a format-independent
612 way (and may never do so...), we have to do it ourselves. We will never
613 be called unless this is an a.out (or very similar) file.
614 FIXME, there should be a cleaner peephole into the BFD environment here. */
616 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
619 dbx_symfile_init (struct objfile *objfile)
622 bfd *sym_bfd = objfile->obfd;
623 char *name = bfd_get_filename (sym_bfd);
625 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
627 /* Allocate struct to keep track of the symfile */
628 objfile->sym_stab_info = (struct dbx_symfile_info *)
629 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
630 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
632 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
633 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
634 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
636 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
637 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
638 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
640 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
642 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
644 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
646 error ("Can't find .text section in symbol file");
647 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
648 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
650 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
651 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
652 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
654 /* Read the string table and stash it away in the objfile_obstack.
655 When we blow away the objfile the string table goes away as well.
656 Note that gdb used to use the results of attempting to malloc the
657 string table, based on the size it read, as a form of sanity check
658 for botched byte swapping, on the theory that a byte swapped string
659 table size would be so totally bogus that the malloc would fail. Now
660 that we put in on the objfile_obstack, we can't do this since gdb gets
661 a fatal error (out of virtual memory) if the size is bogus. We can
662 however at least check to see if the size is less than the size of
663 the size field itself, or larger than the size of the entire file.
664 Note that all valid string tables have a size greater than zero, since
665 the bytes used to hold the size are included in the count. */
667 if (STRING_TABLE_OFFSET == 0)
669 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
670 will never be zero, even when there is no string table. This
671 would appear to be a bug in bfd. */
672 DBX_STRINGTAB_SIZE (objfile) = 0;
673 DBX_STRINGTAB (objfile) = NULL;
677 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
679 perror_with_name (name);
681 memset (size_temp, 0, sizeof (size_temp));
682 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
685 perror_with_name (name);
689 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
690 EOF if there is no string table, and attempting to read the size
691 from EOF will read zero bytes. */
692 DBX_STRINGTAB_SIZE (objfile) = 0;
693 DBX_STRINGTAB (objfile) = NULL;
697 /* Read some data that would appear to be the string table size.
698 If there really is a string table, then it is probably the right
699 size. Byteswap if necessary and validate the size. Note that
700 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
701 random data that happened to be at STRING_TABLE_OFFSET, because
702 bfd can't tell us there is no string table, the sanity checks may
703 or may not catch this. */
704 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
706 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
707 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
708 error ("ridiculous string table size (%d bytes).",
709 DBX_STRINGTAB_SIZE (objfile));
711 DBX_STRINGTAB (objfile) =
712 (char *) obstack_alloc (&objfile->objfile_obstack,
713 DBX_STRINGTAB_SIZE (objfile));
714 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
716 /* Now read in the string table in one big gulp. */
718 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
720 perror_with_name (name);
721 val = bfd_bread (DBX_STRINGTAB (objfile),
722 DBX_STRINGTAB_SIZE (objfile),
724 if (val != DBX_STRINGTAB_SIZE (objfile))
725 perror_with_name (name);
730 /* Perform any local cleanups required when we are done with a particular
731 objfile. I.E, we are in the process of discarding all symbol information
732 for an objfile, freeing up all memory held for it, and unlinking the
733 objfile struct from the global list of known objfiles. */
736 dbx_symfile_finish (struct objfile *objfile)
738 if (objfile->sym_stab_info != NULL)
740 if (HEADER_FILES (objfile) != NULL)
742 int i = N_HEADER_FILES (objfile);
743 struct header_file *hfiles = HEADER_FILES (objfile);
747 xfree (hfiles[i].name);
748 xfree (hfiles[i].vector);
752 xmfree (objfile->md, objfile->sym_stab_info);
754 free_header_files ();
758 /* Buffer for reading the symbol table entries. */
759 static struct external_nlist symbuf[4096];
760 static int symbuf_idx;
761 static int symbuf_end;
763 /* Name of last function encountered. Used in Solaris to approximate
764 object file boundaries. */
765 static char *last_function_name;
767 /* The address in memory of the string table of the object file we are
768 reading (which might not be the "main" object file, but might be a
769 shared library or some other dynamically loaded thing). This is
770 set by read_dbx_symtab when building psymtabs, and by
771 read_ofile_symtab when building symtabs, and is used only by
772 next_symbol_text. FIXME: If that is true, we don't need it when
773 building psymtabs, right? */
774 static char *stringtab_global;
776 /* These variables are used to control fill_symbuf when the stabs
777 symbols are not contiguous (as may be the case when a COFF file is
778 linked using --split-by-reloc). */
779 static struct stab_section_list *symbuf_sections;
780 static unsigned int symbuf_left;
781 static unsigned int symbuf_read;
783 /* This variable stores a global stabs buffer, if we read stabs into
784 memory in one chunk in order to process relocations. */
785 static bfd_byte *stabs_data;
787 /* Refill the symbol table input buffer
788 and set the variables that control fetching entries from it.
789 Reports an error if no data available.
790 This function can read past the end of the symbol table
791 (into the string table) but this does no harm. */
794 fill_symbuf (bfd *sym_bfd)
801 nbytes = sizeof (symbuf);
802 if (nbytes > symbuf_left)
803 nbytes = symbuf_left;
804 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
806 else if (symbuf_sections == NULL)
808 count = sizeof (symbuf);
809 nbytes = bfd_bread (symbuf, count, sym_bfd);
813 if (symbuf_left <= 0)
815 file_ptr filepos = symbuf_sections->section->filepos;
816 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
817 perror_with_name (bfd_get_filename (sym_bfd));
818 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
819 symbol_table_offset = filepos - symbuf_read;
820 symbuf_sections = symbuf_sections->next;
824 if (count > sizeof (symbuf))
825 count = sizeof (symbuf);
826 nbytes = bfd_bread (symbuf, count, sym_bfd);
830 perror_with_name (bfd_get_filename (sym_bfd));
831 else if (nbytes == 0)
832 error ("Premature end of file reading symbol table");
833 symbuf_end = nbytes / symbol_size;
835 symbuf_left -= nbytes;
836 symbuf_read += nbytes;
840 stabs_seek (int sym_offset)
844 symbuf_read += sym_offset;
845 symbuf_left -= sym_offset;
848 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
851 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
853 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
856 if (bfd_get_sign_extend_vma (abfd)) \
857 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
859 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
862 /* Invariant: The symbol pointed to by symbuf_idx is the first one
863 that hasn't been swapped. Swap the symbol at the same time
864 that symbuf_idx is incremented. */
866 /* dbx allows the text of a symbol name to be continued into the
867 next symbol name! When such a continuation is encountered
868 (a \ at the end of the text of a name)
869 call this function to get the continuation. */
872 dbx_next_symbol_text (struct objfile *objfile)
874 struct internal_nlist nlist;
876 if (symbuf_idx == symbuf_end)
877 fill_symbuf (symfile_bfd);
880 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
881 OBJSTAT (objfile, n_stabs++);
885 return nlist.n_strx + stringtab_global + file_string_table_offset;
888 /* Initialize the list of bincls to contain none and have some
892 init_bincl_list (int number, struct objfile *objfile)
894 bincls_allocated = number;
895 next_bincl = bincl_list = (struct header_file_location *)
896 xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
899 /* Add a bincl to the list. */
902 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
904 if (next_bincl >= bincl_list + bincls_allocated)
906 int offset = next_bincl - bincl_list;
907 bincls_allocated *= 2;
908 bincl_list = (struct header_file_location *)
909 xmrealloc (pst->objfile->md, (char *) bincl_list,
910 bincls_allocated * sizeof (struct header_file_location));
911 next_bincl = bincl_list + offset;
913 next_bincl->pst = pst;
914 next_bincl->instance = instance;
915 next_bincl++->name = name;
918 /* Given a name, value pair, find the corresponding
919 bincl in the list. Return the partial symtab associated
920 with that header_file_location. */
922 static struct partial_symtab *
923 find_corresponding_bincl_psymtab (char *name, int instance)
925 struct header_file_location *bincl;
927 for (bincl = bincl_list; bincl < next_bincl; bincl++)
928 if (bincl->instance == instance
929 && strcmp (name, bincl->name) == 0)
932 repeated_header_complaint (name, symnum);
933 return (struct partial_symtab *) 0;
936 /* Free the storage allocated for the bincl list. */
939 free_bincl_list (struct objfile *objfile)
941 xmfree (objfile->md, bincl_list);
942 bincls_allocated = 0;
946 do_free_bincl_list_cleanup (void *objfile)
948 free_bincl_list (objfile);
951 static struct cleanup *
952 make_cleanup_free_bincl_list (struct objfile *objfile)
954 return make_cleanup (do_free_bincl_list_cleanup, objfile);
957 /* Set namestring based on nlist. If the string table index is invalid,
958 give a fake name, and print a single error message per symbol file read,
959 rather than abort the symbol reading or flood the user with messages. */
962 set_namestring (struct objfile *objfile, struct internal_nlist nlist)
966 if (((unsigned) nlist.n_strx + file_string_table_offset) >=
967 DBX_STRINGTAB_SIZE (objfile))
969 complaint (&symfile_complaints, "bad string table offset in symbol %d",
971 namestring = "<bad string table offset>";
974 namestring = nlist.n_strx + file_string_table_offset +
975 DBX_STRINGTAB (objfile);
979 /* Scan a SunOs dynamic symbol table for symbols of interest and
980 add them to the minimal symbol table. */
983 read_dbx_dynamic_symtab (struct objfile *objfile)
985 bfd *abfd = objfile->obfd;
986 struct cleanup *back_to;
999 /* Check that the symbol file has dynamic symbols that we know about.
1000 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1001 on a sun4 host (and vice versa) and bfd is not configured
1002 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1003 so we ignore the dynamic symbols in this case. */
1004 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1005 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1006 || bfd_get_arch (abfd) == bfd_arch_unknown)
1009 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1010 if (dynsym_size < 0)
1013 dynsyms = (asymbol **) xmalloc (dynsym_size);
1014 back_to = make_cleanup (xfree, dynsyms);
1016 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1017 if (dynsym_count < 0)
1019 do_cleanups (back_to);
1023 /* Enter dynamic symbols into the minimal symbol table
1024 if this is a stripped executable. */
1025 if (bfd_get_symcount (abfd) <= 0)
1028 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1030 asymbol *sym = *symptr;
1034 sec = bfd_get_section (sym);
1036 /* BFD symbols are section relative. */
1037 sym_value = sym->value + sec->vma;
1039 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1041 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1044 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1046 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1049 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1051 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1057 if (sym->flags & BSF_GLOBAL)
1060 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1065 /* Symbols from shared libraries have a dynamic relocation entry
1066 that points to the associated slot in the procedure linkage table.
1067 We make a mininal symbol table entry with type mst_solib_trampoline
1068 at the address in the procedure linkage table. */
1069 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1070 if (dynrel_size < 0)
1072 do_cleanups (back_to);
1076 dynrels = (arelent **) xmalloc (dynrel_size);
1077 make_cleanup (xfree, dynrels);
1079 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1080 if (dynrel_count < 0)
1082 do_cleanups (back_to);
1086 for (counter = 0, relptr = dynrels;
1087 counter < dynrel_count;
1088 counter++, relptr++)
1090 arelent *rel = *relptr;
1092 rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1094 switch (bfd_get_arch (abfd))
1096 case bfd_arch_sparc:
1097 if (rel->howto->type != RELOC_JMP_SLOT)
1101 /* `16' is the type BFD produces for a jump table relocation. */
1102 if (rel->howto->type != 16)
1105 /* Adjust address in the jump table to point to
1106 the start of the bsr instruction. */
1113 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1114 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1118 do_cleanups (back_to);
1121 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1123 find_stab_function_addr (char *namestring, char *filename,
1124 struct objfile *objfile)
1126 struct minimal_symbol *msym;
1130 p = strchr (namestring, ':');
1135 strncpy (p, namestring, n);
1138 msym = lookup_minimal_symbol (p, filename, objfile);
1141 /* Sun Fortran appends an underscore to the minimal symbol name,
1142 try again with an appended underscore if the minimal symbol
1146 msym = lookup_minimal_symbol (p, filename, objfile);
1149 if (msym == NULL && filename != NULL)
1151 /* Try again without the filename. */
1153 msym = lookup_minimal_symbol (p, NULL, objfile);
1155 if (msym == NULL && filename != NULL)
1157 /* And try again for Sun Fortran, but without the filename. */
1160 msym = lookup_minimal_symbol (p, NULL, objfile);
1163 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1165 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1168 function_outside_compilation_unit_complaint (const char *arg1)
1170 complaint (&symfile_complaints,
1171 "function `%s' appears to be defined outside of all compilation units",
1175 /* Setup partial_symtab's describing each source file for which
1176 debugging information is available. */
1179 read_dbx_symtab (struct objfile *objfile)
1181 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1182 struct internal_nlist nlist;
1183 CORE_ADDR text_addr;
1188 int past_first_source_file = 0;
1189 CORE_ADDR last_o_file_start = 0;
1190 CORE_ADDR last_function_start = 0;
1191 struct cleanup *back_to;
1193 int textlow_not_set;
1194 int data_sect_index;
1196 /* Current partial symtab */
1197 struct partial_symtab *pst;
1199 /* List of current psymtab's include files */
1200 char **psymtab_include_list;
1201 int includes_allocated;
1204 /* Index within current psymtab dependency list */
1205 struct partial_symtab **dependency_list;
1206 int dependencies_used, dependencies_allocated;
1208 text_addr = DBX_TEXT_ADDR (objfile);
1209 text_size = DBX_TEXT_SIZE (objfile);
1211 /* FIXME. We probably want to change stringtab_global rather than add this
1212 while processing every symbol entry. FIXME. */
1213 file_string_table_offset = 0;
1214 next_file_string_table_offset = 0;
1216 stringtab_global = DBX_STRINGTAB (objfile);
1218 pst = (struct partial_symtab *) 0;
1220 includes_allocated = 30;
1222 psymtab_include_list = (char **) alloca (includes_allocated *
1225 dependencies_allocated = 30;
1226 dependencies_used = 0;
1228 (struct partial_symtab **) alloca (dependencies_allocated *
1229 sizeof (struct partial_symtab *));
1231 /* Init bincl list */
1232 init_bincl_list (20, objfile);
1233 back_to = make_cleanup_free_bincl_list (objfile);
1235 last_source_file = NULL;
1237 lowest_text_address = (CORE_ADDR) -1;
1239 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1240 abfd = objfile->obfd;
1241 symbuf_end = symbuf_idx = 0;
1242 next_symbol_text_func = dbx_next_symbol_text;
1243 textlow_not_set = 1;
1244 has_line_numbers = 0;
1246 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1247 to global and static variables. The stab for a global or static
1248 variable doesn't give us any indication of which section it's in,
1249 so we can't tell immediately which offset in
1250 objfile->section_offsets we should apply to the variable's
1253 We could certainly find out which section contains the variable
1254 by looking up the variable's unrelocated address with
1255 find_pc_section, but that would be expensive; this is the
1256 function that constructs the partial symbol tables by examining
1257 every symbol in the entire executable, and it's
1258 performance-critical. So that expense would not be welcome. I'm
1259 not sure what to do about this at the moment.
1261 What we have done for years is to simply assume that the .data
1262 section's offset is appropriate for all global and static
1263 variables. Recently, this was expanded to fall back to the .bss
1264 section's offset if there is no .data section, and then to the
1265 .rodata section's offset. */
1266 data_sect_index = objfile->sect_index_data;
1267 if (data_sect_index == -1)
1268 data_sect_index = SECT_OFF_BSS (objfile);
1269 if (data_sect_index == -1)
1270 data_sect_index = SECT_OFF_RODATA (objfile);
1272 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1273 for the file to have no .data, no .bss, and no .text at all, if
1274 it also has no global or static variables. If it does, we will
1275 get an internal error from an ANOFFSET macro below when we try to
1276 use data_sect_index. */
1278 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1280 /* Get the symbol for this run and pull out some info */
1281 QUIT; /* allow this to be interruptable */
1282 if (symbuf_idx == symbuf_end)
1284 bufp = &symbuf[symbuf_idx++];
1287 * Special case to speed up readin.
1289 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1291 has_line_numbers = 1;
1295 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1296 OBJSTAT (objfile, n_stabs++);
1298 /* Ok. There is a lot of code duplicated in the rest of this
1299 switch statement (for efficiency reasons). Since I don't
1300 like duplicating code, I will do my penance here, and
1301 describe the code which is duplicated:
1303 *) The assignment to namestring.
1304 *) The call to strchr.
1305 *) The addition of a partial symbol the the two partial
1306 symbol lists. This last is a large section of code, so
1307 I've imbedded it in the following macro.
1310 switch (nlist.n_type)
1314 * Standard, external, non-debugger, symbols
1317 case N_TEXT | N_EXT:
1318 case N_NBTEXT | N_EXT:
1319 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1322 case N_DATA | N_EXT:
1323 case N_NBDATA | N_EXT:
1324 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1329 case N_NBBSS | N_EXT:
1330 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1331 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1336 namestring = set_namestring (objfile, nlist);
1339 record_minimal_symbol (namestring, nlist.n_value,
1340 nlist.n_type, objfile); /* Always */
1343 /* Standard, local, non-debugger, symbols */
1347 /* We need to be able to deal with both N_FN or N_TEXT,
1348 because we have no way of knowing whether the sys-supplied ld
1349 or GNU ld was used to make the executable. Sequents throw
1350 in another wrinkle -- they renumbered N_FN. */
1355 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1356 namestring = set_namestring (objfile, nlist);
1358 if ((namestring[0] == '-' && namestring[1] == 'l')
1359 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1360 && namestring[nsl - 2] == '.'))
1362 if (objfile->ei.entry_point < nlist.n_value &&
1363 objfile->ei.entry_point >= last_o_file_start)
1365 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
1366 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
1368 if (past_first_source_file && pst
1369 /* The gould NP1 uses low values for .o and -l symbols
1370 which are not the address. */
1371 && nlist.n_value >= pst->textlow)
1373 end_psymtab (pst, psymtab_include_list, includes_used,
1374 symnum * symbol_size,
1375 nlist.n_value > pst->texthigh
1376 ? nlist.n_value : pst->texthigh,
1377 dependency_list, dependencies_used, textlow_not_set);
1378 pst = (struct partial_symtab *) 0;
1380 dependencies_used = 0;
1383 past_first_source_file = 1;
1384 last_o_file_start = nlist.n_value;
1391 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1394 case N_UNDF | N_EXT:
1395 if (nlist.n_value != 0)
1397 /* This is a "Fortran COMMON" symbol. See if the target
1398 environment knows where it has been relocated to. */
1402 namestring = set_namestring (objfile, nlist);
1403 if (target_lookup_symbol (namestring, &reladdr))
1405 continue; /* Error in lookup; ignore symbol for now. */
1407 nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */
1408 nlist.n_value = reladdr;
1409 goto bss_ext_symbol;
1411 continue; /* Just undefined, not COMMON */
1414 if (processing_acc_compilation && nlist.n_strx == 1)
1416 /* Deal with relative offsets in the string table
1417 used in ELF+STAB under Solaris. If we want to use the
1418 n_strx field, which contains the name of the file,
1419 we must adjust file_string_table_offset *before* calling
1420 set_namestring(). */
1421 past_first_source_file = 1;
1422 file_string_table_offset = next_file_string_table_offset;
1423 next_file_string_table_offset =
1424 file_string_table_offset + nlist.n_value;
1425 if (next_file_string_table_offset < file_string_table_offset)
1426 error ("string table offset backs up at %d", symnum);
1427 /* FIXME -- replace error() with complaint. */
1432 /* Lots of symbol types we can just ignore. */
1439 /* Keep going . . . */
1442 * Special symbol types for GNU
1445 case N_INDR | N_EXT:
1447 case N_SETA | N_EXT:
1449 case N_SETT | N_EXT:
1451 case N_SETD | N_EXT:
1453 case N_SETB | N_EXT:
1464 static int prev_so_symnum = -10;
1465 static int first_so_symnum;
1467 int prev_textlow_not_set;
1469 valu = nlist.n_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1471 prev_textlow_not_set = textlow_not_set;
1473 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1474 /* A zero value is probably an indication for the SunPRO 3.0
1475 compiler. end_psymtab explicitly tests for zero, so
1476 don't relocate it. */
1478 if (nlist.n_value == 0)
1480 textlow_not_set = 1;
1484 textlow_not_set = 0;
1486 textlow_not_set = 0;
1488 past_first_source_file = 1;
1490 if (prev_so_symnum != symnum - 1)
1491 { /* Here if prev stab wasn't N_SO */
1492 first_so_symnum = symnum;
1496 end_psymtab (pst, psymtab_include_list, includes_used,
1497 symnum * symbol_size,
1498 valu > pst->texthigh ? valu : pst->texthigh,
1499 dependency_list, dependencies_used,
1500 prev_textlow_not_set);
1501 pst = (struct partial_symtab *) 0;
1503 dependencies_used = 0;
1507 prev_so_symnum = symnum;
1509 /* End the current partial symtab and start a new one */
1511 namestring = set_namestring (objfile, nlist);
1513 /* Null name means end of .o file. Don't start a new one. */
1514 if (*namestring == '\000')
1517 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1518 The first one is a directory name; the second the file name.
1519 If pst exists, is empty, and has a filename ending in '/',
1520 we assume the previous N_SO was a directory name. */
1522 p = strrchr (namestring, '/');
1523 if (p && *(p + 1) == '\000')
1524 continue; /* Simply ignore directory name SOs */
1526 /* Some other compilers (C++ ones in particular) emit useless
1527 SOs for non-existant .c files. We ignore all subsequent SOs that
1528 immediately follow the first. */
1531 pst = start_psymtab (objfile,
1533 first_so_symnum * symbol_size,
1534 objfile->global_psymbols.next,
1535 objfile->static_psymbols.next);
1541 enum language tmp_language;
1542 /* Add this bincl to the bincl_list for future EXCLs. No
1543 need to save the string; it'll be around until
1544 read_dbx_symtab function returns */
1546 namestring = set_namestring (objfile, nlist);
1547 tmp_language = deduce_language_from_filename (namestring);
1549 /* Only change the psymtab's language if we've learned
1550 something useful (eg. tmp_language is not language_unknown).
1551 In addition, to match what start_subfile does, never change
1553 if (tmp_language != language_unknown
1554 && (tmp_language != language_c
1555 || psymtab_language != language_cplus))
1556 psymtab_language = tmp_language;
1560 /* FIXME: we should not get here without a PST to work on.
1561 Attempt to recover. */
1562 complaint (&symfile_complaints,
1563 "N_BINCL %s not in entries for any file, at symtab pos %d",
1564 namestring, symnum);
1567 add_bincl_to_list (pst, namestring, nlist.n_value);
1569 /* Mark down an include file in the current psymtab */
1571 goto record_include_file;
1576 enum language tmp_language;
1577 /* Mark down an include file in the current psymtab */
1579 namestring = set_namestring (objfile, nlist);
1580 tmp_language = deduce_language_from_filename (namestring);
1582 /* Only change the psymtab's language if we've learned
1583 something useful (eg. tmp_language is not language_unknown).
1584 In addition, to match what start_subfile does, never change
1586 if (tmp_language != language_unknown
1587 && (tmp_language != language_c
1588 || psymtab_language != language_cplus))
1589 psymtab_language = tmp_language;
1591 /* In C++, one may expect the same filename to come round many
1592 times, when code is coming alternately from the main file
1593 and from inline functions in other files. So I check to see
1594 if this is a file we've seen before -- either the main
1595 source file, or a previously included file.
1597 This seems to be a lot of time to be spending on N_SOL, but
1598 things like "break c-exp.y:435" need to work (I
1599 suppose the psymtab_include_list could be hashed or put
1600 in a binary tree, if profiling shows this is a major hog). */
1601 if (pst && strcmp (namestring, pst->filename) == 0)
1605 for (i = 0; i < includes_used; i++)
1606 if (strcmp (namestring, psymtab_include_list[i]) == 0)
1615 record_include_file:
1617 psymtab_include_list[includes_used++] = namestring;
1618 if (includes_used >= includes_allocated)
1620 char **orig = psymtab_include_list;
1622 psymtab_include_list = (char **)
1623 alloca ((includes_allocated *= 2) *
1625 memcpy (psymtab_include_list, orig,
1626 includes_used * sizeof (char *));
1630 case N_LSYM: /* Typedef or automatic variable. */
1631 case N_STSYM: /* Data seg var -- static */
1632 case N_LCSYM: /* BSS " */
1633 case N_ROSYM: /* Read-only data seg var -- static. */
1634 case N_NBSTS: /* Gould nobase. */
1635 case N_NBLCS: /* symbols. */
1637 case N_GSYM: /* Global (extern) variable; can be
1638 data or bss (sigh FIXME). */
1640 /* Following may probably be ignored; I'll leave them here
1641 for now (until I do Pascal and Modula 2 extensions). */
1643 case N_PC: /* I may or may not need this; I
1645 case N_M2C: /* I suspect that I can ignore this here. */
1646 case N_SCOPE: /* Same. */
1648 namestring = set_namestring (objfile, nlist);
1650 /* See if this is an end of function stab. */
1651 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1655 /* It's value is the size (in bytes) of the function for
1656 function relative stabs, or the address of the function's
1657 end for old style stabs. */
1658 valu = nlist.n_value + last_function_start;
1659 if (pst->texthigh == 0 || valu > pst->texthigh)
1660 pst->texthigh = valu;
1664 p = (char *) strchr (namestring, ':');
1666 continue; /* Not a debugging symbol. */
1670 /* Main processing section for debugging symbols which
1671 the initial read through the symbol tables needs to worry
1672 about. If we reach this point, the symbol which we are
1673 considering is definitely one we are interested in.
1674 p must also contain the (valid) index into the namestring
1675 which indicates the debugging type symbol. */
1680 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1681 #ifdef STATIC_TRANSFORM_NAME
1682 namestring = STATIC_TRANSFORM_NAME (namestring);
1684 add_psymbol_to_list (namestring, p - namestring,
1685 VAR_DOMAIN, LOC_STATIC,
1686 &objfile->static_psymbols,
1688 psymtab_language, objfile);
1691 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1692 /* The addresses in these entries are reported to be
1693 wrong. See the code that reads 'G's for symtabs. */
1694 add_psymbol_to_list (namestring, p - namestring,
1695 VAR_DOMAIN, LOC_STATIC,
1696 &objfile->global_psymbols,
1698 psymtab_language, objfile);
1702 /* When a 'T' entry is defining an anonymous enum, it
1703 may have a name which is the empty string, or a
1704 single space. Since they're not really defining a
1705 symbol, those shouldn't go in the partial symbol
1706 table. We do pick up the elements of such enums at
1707 'check_enum:', below. */
1708 if (p >= namestring + 2
1709 || (p == namestring + 1
1710 && namestring[0] != ' '))
1712 add_psymbol_to_list (namestring, p - namestring,
1713 STRUCT_DOMAIN, LOC_TYPEDEF,
1714 &objfile->static_psymbols,
1716 psymtab_language, objfile);
1719 /* Also a typedef with the same name. */
1720 add_psymbol_to_list (namestring, p - namestring,
1721 VAR_DOMAIN, LOC_TYPEDEF,
1722 &objfile->static_psymbols,
1724 psymtab_language, objfile);
1730 if (p != namestring) /* a name is there, not just :T... */
1732 add_psymbol_to_list (namestring, p - namestring,
1733 VAR_DOMAIN, LOC_TYPEDEF,
1734 &objfile->static_psymbols,
1736 psymtab_language, objfile);
1739 /* If this is an enumerated type, we need to
1740 add all the enum constants to the partial symbol
1741 table. This does not cover enums without names, e.g.
1742 "enum {a, b} c;" in C, but fortunately those are
1743 rare. There is no way for GDB to find those from the
1744 enum type without spending too much time on it. Thus
1745 to solve this problem, the compiler needs to put out the
1746 enum in a nameless type. GCC2 does this. */
1748 /* We are looking for something of the form
1749 <name> ":" ("t" | "T") [<number> "="] "e"
1750 {<constant> ":" <value> ","} ";". */
1752 /* Skip over the colon and the 't' or 'T'. */
1754 /* This type may be given a number. Also, numbers can come
1755 in pairs like (0,26). Skip over it. */
1756 while ((*p >= '0' && *p <= '9')
1757 || *p == '(' || *p == ',' || *p == ')'
1763 /* The aix4 compiler emits extra crud before the members. */
1766 /* Skip over the type (?). */
1770 /* Skip over the colon. */
1774 /* We have found an enumerated type. */
1775 /* According to comments in read_enum_type
1776 a comma could end it instead of a semicolon.
1777 I don't know where that happens.
1779 while (*p && *p != ';' && *p != ',')
1783 /* Check for and handle cretinous dbx symbol name
1785 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1786 p = next_symbol_text (objfile);
1788 /* Point to the character after the name
1789 of the enum constant. */
1790 for (q = p; *q && *q != ':'; q++)
1792 /* Note that the value doesn't matter for
1793 enum constants in psymtabs, just in symtabs. */
1794 add_psymbol_to_list (p, q - p,
1795 VAR_DOMAIN, LOC_CONST,
1796 &objfile->static_psymbols, 0,
1797 0, psymtab_language, objfile);
1798 /* Point past the name. */
1800 /* Skip over the value. */
1801 while (*p && *p != ',')
1803 /* Advance past the comma. */
1810 /* Constant, e.g. from "const" in Pascal. */
1811 add_psymbol_to_list (namestring, p - namestring,
1812 VAR_DOMAIN, LOC_CONST,
1813 &objfile->static_psymbols, nlist.n_value,
1814 0, psymtab_language, objfile);
1820 int name_len = p - namestring;
1821 char *name = xmalloc (name_len + 1);
1822 memcpy (name, namestring, name_len);
1823 name[name_len] = '\0';
1824 function_outside_compilation_unit_complaint (name);
1827 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1828 /* Kludges for ELF/STABS with Sun ACC */
1829 last_function_name = namestring;
1830 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1831 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1832 value for the bottom of the text seg in those cases. */
1833 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1834 SECT_OFF_TEXT (objfile)))
1836 CORE_ADDR minsym_valu =
1837 find_stab_function_addr (namestring, pst->filename, objfile);
1838 /* find_stab_function_addr will return 0 if the minimal
1839 symbol wasn't found. (Unfortunately, this might also
1840 be a valid address.) Anyway, if it *does* return 0,
1841 it is likely that the value was set correctly to begin
1843 if (minsym_valu != 0)
1844 nlist.n_value = minsym_valu;
1846 if (pst && textlow_not_set)
1848 pst->textlow = nlist.n_value;
1849 textlow_not_set = 0;
1854 /* Keep track of the start of the last function so we
1855 can handle end of function symbols. */
1856 last_function_start = nlist.n_value;
1858 /* In reordered executables this function may lie outside
1859 the bounds created by N_SO symbols. If that's the case
1860 use the address of this function as the low bound for
1861 the partial symbol table. */
1864 || (nlist.n_value < pst->textlow
1866 != ANOFFSET (objfile->section_offsets,
1867 SECT_OFF_TEXT (objfile))))))
1869 pst->textlow = nlist.n_value;
1870 textlow_not_set = 0;
1872 add_psymbol_to_list (namestring, p - namestring,
1873 VAR_DOMAIN, LOC_BLOCK,
1874 &objfile->static_psymbols,
1876 psymtab_language, objfile);
1879 /* Global functions were ignored here, but now they
1880 are put into the global psymtab like one would expect.
1881 They're also in the minimal symbol table. */
1885 int name_len = p - namestring;
1886 char *name = xmalloc (name_len + 1);
1887 memcpy (name, namestring, name_len);
1888 name[name_len] = '\0';
1889 function_outside_compilation_unit_complaint (name);
1892 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1893 /* Kludges for ELF/STABS with Sun ACC */
1894 last_function_name = namestring;
1895 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1896 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1897 value for the bottom of the text seg in those cases. */
1898 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1899 SECT_OFF_TEXT (objfile)))
1901 CORE_ADDR minsym_valu =
1902 find_stab_function_addr (namestring, pst->filename, objfile);
1903 /* find_stab_function_addr will return 0 if the minimal
1904 symbol wasn't found. (Unfortunately, this might also
1905 be a valid address.) Anyway, if it *does* return 0,
1906 it is likely that the value was set correctly to begin
1908 if (minsym_valu != 0)
1909 nlist.n_value = minsym_valu;
1911 if (pst && textlow_not_set)
1913 pst->textlow = nlist.n_value;
1914 textlow_not_set = 0;
1919 /* Keep track of the start of the last function so we
1920 can handle end of function symbols. */
1921 last_function_start = nlist.n_value;
1923 /* In reordered executables this function may lie outside
1924 the bounds created by N_SO symbols. If that's the case
1925 use the address of this function as the low bound for
1926 the partial symbol table. */
1929 || (nlist.n_value < pst->textlow
1931 != ANOFFSET (objfile->section_offsets,
1932 SECT_OFF_TEXT (objfile))))))
1934 pst->textlow = nlist.n_value;
1935 textlow_not_set = 0;
1937 add_psymbol_to_list (namestring, p - namestring,
1938 VAR_DOMAIN, LOC_BLOCK,
1939 &objfile->global_psymbols,
1941 psymtab_language, objfile);
1944 /* Two things show up here (hopefully); static symbols of
1945 local scope (static used inside braces) or extensions
1946 of structure symbols. We can ignore both. */
1960 case '#': /* for symbol identification (used in live ranges) */
1964 /* It is a C++ nested symbol. We don't need to record it
1965 (I don't think); if we try to look up foo::bar::baz,
1966 then symbols for the symtab containing foo should get
1967 read in, I think. */
1968 /* Someone says sun cc puts out symbols like
1969 /foo/baz/maclib::/usr/local/bin/maclib,
1970 which would get here with a symbol type of ':'. */
1974 /* Unexpected symbol descriptor. The second and subsequent stabs
1975 of a continued stab can show up here. The question is
1976 whether they ever can mimic a normal stab--it would be
1977 nice if not, since we certainly don't want to spend the
1978 time searching to the end of every string looking for
1981 complaint (&symfile_complaints, "unknown symbol descriptor `%c'",
1984 /* Ignore it; perhaps it is an extension that we don't
1991 namestring = set_namestring (objfile, nlist);
1993 /* Find the corresponding bincl and mark that psymtab on the
1994 psymtab dependency list */
1996 struct partial_symtab *needed_pst =
1997 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
1999 /* If this include file was defined earlier in this file,
2001 if (needed_pst == pst)
2009 for (i = 0; i < dependencies_used; i++)
2010 if (dependency_list[i] == needed_pst)
2016 /* If it's already in the list, skip the rest. */
2020 dependency_list[dependencies_used++] = needed_pst;
2021 if (dependencies_used >= dependencies_allocated)
2023 struct partial_symtab **orig = dependency_list;
2025 (struct partial_symtab **)
2026 alloca ((dependencies_allocated *= 2)
2027 * sizeof (struct partial_symtab *));
2028 memcpy (dependency_list, orig,
2030 * sizeof (struct partial_symtab *)));
2032 fprintf_unfiltered (gdb_stderr, "Had to reallocate dependency list.\n");
2033 fprintf_unfiltered (gdb_stderr, "New dependencies allocated: %d\n",
2034 dependencies_allocated);
2042 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2043 /* Solaris 2 end of module, finish current partial symbol table.
2044 end_psymtab will set pst->texthigh to the proper value, which
2045 is necessary if a module compiled without debugging info
2046 follows this module. */
2049 end_psymtab (pst, psymtab_include_list, includes_used,
2050 symnum * symbol_size,
2052 dependency_list, dependencies_used, textlow_not_set);
2053 pst = (struct partial_symtab *) 0;
2055 dependencies_used = 0;
2062 HANDLE_RBRAC (nlist.n_value);
2068 case N_SSYM: /* Claim: Structure or union element.
2069 Hopefully, I can ignore this. */
2070 case N_ENTRY: /* Alternate entry point; can ignore. */
2071 case N_MAIN: /* Can definitely ignore this. */
2072 case N_CATCH: /* These are GNU C++ extensions */
2073 case N_EHDECL: /* that can safely be ignored here. */
2083 case N_NSYMS: /* Ultrix 4.0: symbol count */
2084 case N_DEFD: /* GNU Modula-2 */
2085 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2087 case N_OBJ: /* useless types from Solaris */
2090 /* These symbols aren't interesting; don't worry about them */
2095 /* If we haven't found it yet, ignore it. It's probably some
2096 new type we don't know about yet. */
2097 unknown_symtype_complaint (local_hex_string (nlist.n_type));
2102 /* If there's stuff to be cleaned up, clean it up. */
2103 if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
2104 /*FIXME, does this have a bug at start address 0? */
2105 && last_o_file_start
2106 && objfile->ei.entry_point < nlist.n_value
2107 && objfile->ei.entry_point >= last_o_file_start)
2109 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
2110 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
2115 /* Don't set pst->texthigh lower than it already is. */
2116 CORE_ADDR text_end =
2117 (lowest_text_address == (CORE_ADDR) -1
2118 ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
2119 : lowest_text_address)
2122 end_psymtab (pst, psymtab_include_list, includes_used,
2123 symnum * symbol_size,
2124 text_end > pst->texthigh ? text_end : pst->texthigh,
2125 dependency_list, dependencies_used, textlow_not_set);
2128 do_cleanups (back_to);
2131 /* Allocate and partially fill a partial symtab. It will be
2132 completely filled at the end of the symbol list.
2134 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2135 is the address relative to which its symbols are (incremental) or 0
2139 static struct partial_symtab *
2140 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2141 int ldsymoff, struct partial_symbol **global_syms,
2142 struct partial_symbol **static_syms)
2144 struct partial_symtab *result =
2145 start_psymtab_common (objfile, objfile->section_offsets,
2146 filename, textlow, global_syms, static_syms);
2148 result->read_symtab_private = (char *)
2149 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2150 LDSYMOFF (result) = ldsymoff;
2151 result->read_symtab = dbx_psymtab_to_symtab;
2152 SYMBOL_SIZE (result) = symbol_size;
2153 SYMBOL_OFFSET (result) = symbol_table_offset;
2154 STRING_OFFSET (result) = string_table_offset;
2155 FILE_STRING_OFFSET (result) = file_string_table_offset;
2157 /* If we're handling an ELF file, drag some section-relocation info
2158 for this source file out of the ELF symbol table, to compensate for
2159 Sun brain death. This replaces the section_offsets in this psymtab,
2161 elfstab_offset_sections (objfile, result);
2163 /* Deduce the source language from the filename for this psymtab. */
2164 psymtab_language = deduce_language_from_filename (filename);
2169 /* Close off the current usage of PST.
2170 Returns PST or NULL if the partial symtab was empty and thrown away.
2172 FIXME: List variables and peculiarities of same. */
2174 struct partial_symtab *
2175 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
2176 int capping_symbol_offset, CORE_ADDR capping_text,
2177 struct partial_symtab **dependency_list, int number_dependencies,
2178 int textlow_not_set)
2181 struct objfile *objfile = pst->objfile;
2183 if (capping_symbol_offset != -1)
2184 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2185 pst->texthigh = capping_text;
2187 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2188 /* Under Solaris, the N_SO symbols always have a value of 0,
2189 instead of the usual address of the .o file. Therefore,
2190 we have to do some tricks to fill in texthigh and textlow.
2191 The first trick is: if we see a static
2192 or global function, and the textlow for the current pst
2193 is not set (ie: textlow_not_set), then we use that function's
2194 address for the textlow of the pst. */
2196 /* Now, to fill in texthigh, we remember the last function seen
2197 in the .o file. Also, there's a hack in
2198 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2199 to here via the misc_info field. Therefore, we can fill in
2200 a reliable texthigh by taking the address plus size of the
2201 last function in the file. */
2203 if (pst->texthigh == 0 && last_function_name)
2207 struct minimal_symbol *minsym;
2209 p = strchr (last_function_name, ':');
2211 p = last_function_name;
2212 n = p - last_function_name;
2214 strncpy (p, last_function_name, n);
2217 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2220 /* Sun Fortran appends an underscore to the minimal symbol name,
2221 try again with an appended underscore if the minimal symbol
2225 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2229 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2231 last_function_name = NULL;
2234 /* this test will be true if the last .o file is only data */
2235 if (textlow_not_set)
2236 pst->textlow = pst->texthigh;
2239 struct partial_symtab *p1;
2241 /* If we know our own starting text address, then walk through all other
2242 psymtabs for this objfile, and if any didn't know their ending text
2243 address, set it to our starting address. Take care to not set our
2244 own ending address to our starting address, nor to set addresses on
2245 `dependency' files that have both textlow and texthigh zero. */
2247 ALL_OBJFILE_PSYMTABS (objfile, p1)
2249 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2251 p1->texthigh = pst->textlow;
2252 /* if this file has only data, then make textlow match texthigh */
2253 if (p1->textlow == 0)
2254 p1->textlow = p1->texthigh;
2259 /* End of kludge for patching Solaris textlow and texthigh. */
2260 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2262 pst->n_global_syms =
2263 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
2264 pst->n_static_syms =
2265 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
2267 pst->number_of_dependencies = number_dependencies;
2268 if (number_dependencies)
2270 pst->dependencies = (struct partial_symtab **)
2271 obstack_alloc (&objfile->objfile_obstack,
2272 number_dependencies * sizeof (struct partial_symtab *));
2273 memcpy (pst->dependencies, dependency_list,
2274 number_dependencies * sizeof (struct partial_symtab *));
2277 pst->dependencies = 0;
2279 for (i = 0; i < num_includes; i++)
2281 struct partial_symtab *subpst =
2282 allocate_psymtab (include_list[i], objfile);
2284 /* Copy the sesction_offsets array from the main psymtab. */
2285 subpst->section_offsets = pst->section_offsets;
2286 subpst->read_symtab_private =
2287 (char *) obstack_alloc (&objfile->objfile_obstack,
2288 sizeof (struct symloc));
2292 subpst->texthigh = 0;
2294 /* We could save slight bits of space by only making one of these,
2295 shared by the entire set of include files. FIXME-someday. */
2296 subpst->dependencies = (struct partial_symtab **)
2297 obstack_alloc (&objfile->objfile_obstack,
2298 sizeof (struct partial_symtab *));
2299 subpst->dependencies[0] = pst;
2300 subpst->number_of_dependencies = 1;
2302 subpst->globals_offset =
2303 subpst->n_global_syms =
2304 subpst->statics_offset =
2305 subpst->n_static_syms = 0;
2309 subpst->read_symtab = pst->read_symtab;
2312 sort_pst_symbols (pst);
2314 /* If there is already a psymtab or symtab for a file of this name, remove it.
2315 (If there is a symtab, more drastic things also happen.)
2316 This happens in VxWorks. */
2317 free_named_symtabs (pst->filename);
2319 if (num_includes == 0
2320 && number_dependencies == 0
2321 && pst->n_global_syms == 0
2322 && pst->n_static_syms == 0
2323 && has_line_numbers == 0)
2325 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2326 it is on the obstack, but we can forget to chain it on the list. */
2327 /* Empty psymtabs happen as a result of header files which don't have
2328 any symbols in them. There can be a lot of them. But this check
2329 is wrong, in that a psymtab with N_SLINE entries but nothing else
2330 is not empty, but we don't realize that. Fixing that without slowing
2331 things down might be tricky. */
2333 discard_psymtab (pst);
2335 /* Indicate that psymtab was thrown away. */
2336 pst = (struct partial_symtab *) NULL;
2342 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
2344 struct cleanup *old_chain;
2352 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2357 /* Read in all partial symtabs on which this one is dependent */
2358 for (i = 0; i < pst->number_of_dependencies; i++)
2359 if (!pst->dependencies[i]->readin)
2361 /* Inform about additional files that need to be read in. */
2364 fputs_filtered (" ", gdb_stdout);
2366 fputs_filtered ("and ", gdb_stdout);
2368 printf_filtered ("%s...", pst->dependencies[i]->filename);
2369 wrap_here (""); /* Flush output */
2370 gdb_flush (gdb_stdout);
2372 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
2375 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
2377 /* Init stuff necessary for reading in symbols */
2380 old_chain = make_cleanup (really_free_pendings, 0);
2381 file_string_table_offset = FILE_STRING_OFFSET (pst);
2382 symbol_size = SYMBOL_SIZE (pst);
2384 /* Read in this file's symbols */
2385 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2386 read_ofile_symtab (pst);
2388 do_cleanups (old_chain);
2394 /* Read in all of the symbols for a given psymtab for real.
2395 Be verbose about it if the user wants that. */
2398 dbx_psymtab_to_symtab (struct partial_symtab *pst)
2401 struct cleanup *back_to = NULL;
2408 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2413 if (LDSYMLEN (pst) || pst->number_of_dependencies)
2415 /* Print the message now, before reading the string table,
2416 to avoid disconcerting pauses. */
2419 printf_filtered ("Reading in symbols for %s...", pst->filename);
2420 gdb_flush (gdb_stdout);
2423 sym_bfd = pst->objfile->obfd;
2425 next_symbol_text_func = dbx_next_symbol_text;
2427 if (DBX_STAB_SECTION (pst->objfile))
2430 = symfile_relocate_debug_section (pst->objfile->obfd,
2431 DBX_STAB_SECTION (pst->objfile),
2434 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
2437 dbx_psymtab_to_symtab_1 (pst);
2440 do_cleanups (back_to);
2442 /* Match with global symbols. This only needs to be done once,
2443 after all of the symtabs and dependencies have been read in. */
2444 scan_file_globals (pst->objfile);
2446 /* Finish up the debug error message. */
2448 printf_filtered ("done.\n");
2452 /* Read in a defined section of a specific object file's symbols. */
2455 read_ofile_symtab (struct partial_symtab *pst)
2458 struct external_nlist *bufp;
2459 struct internal_nlist nlist;
2461 unsigned max_symnum;
2463 struct objfile *objfile;
2464 int sym_offset; /* Offset to start of symbols to read */
2465 int sym_size; /* Size of symbols to read */
2466 CORE_ADDR text_offset; /* Start of text segment for symbols */
2467 int text_size; /* Size of text segment for symbols */
2468 struct section_offsets *section_offsets;
2470 objfile = pst->objfile;
2471 sym_offset = LDSYMOFF (pst);
2472 sym_size = LDSYMLEN (pst);
2473 text_offset = pst->textlow;
2474 text_size = pst->texthigh - pst->textlow;
2475 /* This cannot be simply objfile->section_offsets because of
2476 elfstab_offset_sections() which initializes the psymtab section
2477 offsets information in a special way, and that is different from
2478 objfile->section_offsets. */
2479 section_offsets = pst->section_offsets;
2481 current_objfile = objfile;
2482 subfile_stack = NULL;
2484 stringtab_global = DBX_STRINGTAB (objfile);
2485 last_source_file = NULL;
2487 abfd = objfile->obfd;
2488 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
2489 symbuf_end = symbuf_idx = 0;
2491 symbuf_left = sym_offset + sym_size;
2493 /* It is necessary to actually read one symbol *before* the start
2494 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2495 occurs before the N_SO symbol.
2497 Detecting this in read_dbx_symtab
2498 would slow down initial readin, so we look for it here instead. */
2499 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2501 stabs_seek (sym_offset - symbol_size);
2503 bufp = &symbuf[symbuf_idx++];
2504 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2505 OBJSTAT (objfile, n_stabs++);
2507 namestring = set_namestring (objfile, nlist);
2509 processing_gcc_compilation = 0;
2510 if (nlist.n_type == N_TEXT)
2512 const char *tempstring = namestring;
2514 if (DEPRECATED_STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2515 processing_gcc_compilation = 1;
2516 else if (DEPRECATED_STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2517 processing_gcc_compilation = 2;
2518 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2520 if (DEPRECATED_STREQN (tempstring, "__gnu_compiled", 14))
2521 processing_gcc_compilation = 2;
2524 /* Try to select a C++ demangling based on the compilation unit
2528 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2529 know whether it will use the old style or v3 mangling. */
2530 if (processing_gcc_compilation)
2532 if (AUTO_DEMANGLING)
2534 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2541 /* The N_SO starting this symtab is the first symbol, so we
2542 better not check the symbol before it. I'm not this can
2543 happen, but it doesn't hurt to check for it. */
2544 stabs_seek (sym_offset);
2545 processing_gcc_compilation = 0;
2548 if (symbuf_idx == symbuf_end)
2550 bufp = &symbuf[symbuf_idx];
2551 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2552 error ("First symbol in segment of executable not a source symbol");
2554 max_symnum = sym_size / symbol_size;
2557 symnum < max_symnum;
2560 QUIT; /* Allow this to be interruptable */
2561 if (symbuf_idx == symbuf_end)
2563 bufp = &symbuf[symbuf_idx++];
2564 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2565 OBJSTAT (objfile, n_stabs++);
2567 type = bfd_h_get_8 (abfd, bufp->e_type);
2569 namestring = set_namestring (objfile, nlist);
2573 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2574 namestring, section_offsets, objfile);
2576 /* We skip checking for a new .o or -l file; that should never
2577 happen in this routine. */
2578 else if (type == N_TEXT)
2580 /* I don't think this code will ever be executed, because
2581 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2582 the N_SO symbol which starts this source file.
2583 However, there is no reason not to accept
2584 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2586 if (DEPRECATED_STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2587 processing_gcc_compilation = 1;
2588 else if (DEPRECATED_STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2589 processing_gcc_compilation = 2;
2592 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2593 know whether it will use the old style or v3 mangling. */
2594 if (AUTO_DEMANGLING)
2596 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2600 else if (type & N_EXT || type == (unsigned char) N_TEXT
2601 || type == (unsigned char) N_NBTEXT
2604 /* Global symbol: see if we came across a dbx defintion for
2605 a corresponding symbol. If so, store the value. Remove
2606 syms from the chain when their values are stored, but
2607 search the whole chain, as there may be several syms from
2608 different files with the same name. */
2609 /* This is probably not true. Since the files will be read
2610 in one at a time, each reference to a global symbol will
2611 be satisfied in each file as it appears. So we skip this
2617 current_objfile = NULL;
2619 /* In a Solaris elf file, this variable, which comes from the
2620 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2621 which comes from pst->textlow is correct. */
2622 if (last_source_start_addr == 0)
2623 last_source_start_addr = text_offset;
2625 /* In reordered executables last_source_start_addr may not be the
2626 lower bound for this symtab, instead use text_offset which comes
2627 from pst->textlow which is correct. */
2628 if (last_source_start_addr > text_offset)
2629 last_source_start_addr = text_offset;
2631 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
2637 /* This handles a single symbol from the symbol-file, building symbols
2638 into a GDB symtab. It takes these arguments and an implicit argument.
2640 TYPE is the type field of the ".stab" symbol entry.
2641 DESC is the desc field of the ".stab" entry.
2642 VALU is the value field of the ".stab" entry.
2643 NAME is the symbol name, in our address space.
2644 SECTION_OFFSETS is a set of amounts by which the sections of this object
2645 file were relocated when it was loaded into memory.
2646 Note that these section_offsets are not the
2647 objfile->section_offsets but the pst->section_offsets.
2648 All symbols that refer
2649 to memory locations need to be offset by these amounts.
2650 OBJFILE is the object file from which we are reading symbols.
2651 It is used in end_symtab. */
2654 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2655 struct section_offsets *section_offsets,
2656 struct objfile *objfile)
2658 #ifdef SUN_FIXED_LBRAC_BUG
2659 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2660 to correct the address of N_LBRAC's. If it is not defined, then
2661 we never need to correct the addresses. */
2663 /* This records the last pc address we've seen. We depend on there being
2664 an SLINE or FUN or SO before the first LBRAC, since the variable does
2665 not get reset in between reads of different symbol files. */
2666 static CORE_ADDR last_pc_address;
2669 struct context_stack *new;
2670 /* This remembers the address of the start of a function. It is used
2671 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2672 relative to the current function's start address. On systems
2673 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2674 used to relocate these symbol types rather than SECTION_OFFSETS. */
2675 static CORE_ADDR function_start_offset;
2677 /* This holds the address of the start of a function, without the system
2678 peculiarities of function_start_offset. */
2679 static CORE_ADDR last_function_start;
2681 /* If this is nonzero, we've seen an N_SLINE since the start of the
2682 current function. We use this to tell us to move the first sline
2683 to the beginning of the function regardless of what its given
2685 static int sline_found_in_function = 1;
2687 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2688 file. Used to detect the SunPRO solaris compiler. */
2689 static int n_opt_found;
2691 /* The stab type used for the definition of the last function.
2692 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2693 static int function_stab_type = 0;
2695 if (!block_address_function_relative)
2696 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2697 function start address, so just use the text offset. */
2698 function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2700 /* Something is wrong if we see real data before
2701 seeing a source file name. */
2703 if (last_source_file == NULL && type != (unsigned char) N_SO)
2705 /* Ignore any symbols which appear before an N_SO symbol.
2706 Currently no one puts symbols there, but we should deal
2707 gracefully with the case. A complain()t might be in order,
2708 but this should not be an error (). */
2717 if (*name == '\000')
2719 /* This N_FUN marks the end of a function. This closes off the
2722 if (context_stack_depth <= 0)
2724 lbrac_mismatch_complaint (symnum);
2728 /* The following check is added before recording line 0 at
2729 end of function so as to handle hand-generated stabs
2730 which may have an N_FUN stabs at the end of the function, but
2731 no N_SLINE stabs. */
2732 if (sline_found_in_function)
2733 record_line (current_subfile, 0, last_function_start + valu);
2735 within_function = 0;
2736 new = pop_context ();
2738 /* Make a block for the local symbols within. */
2739 finish_block (new->name, &local_symbols, new->old_blocks,
2740 new->start_addr, new->start_addr + valu,
2743 /* May be switching to an assembler file which may not be using
2744 block relative stabs, so reset the offset. */
2745 if (block_address_function_relative)
2746 function_start_offset = 0;
2751 sline_found_in_function = 0;
2753 /* Relocate for dynamic loading */
2754 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2755 valu = SMASH_TEXT_ADDRESS (valu);
2756 last_function_start = valu;
2758 goto define_a_symbol;
2761 /* This "symbol" just indicates the start of an inner lexical
2762 context within a function. */
2764 /* Ignore extra outermost context from SunPRO cc and acc. */
2765 if (n_opt_found && desc == 1)
2768 if (block_address_function_relative)
2769 /* Relocate for Sun ELF acc fn-relative syms. */
2770 valu += function_start_offset;
2772 /* On most machines, the block addresses are relative to the
2773 N_SO, the linker did not relocate them (sigh). */
2774 valu += last_source_start_addr;
2776 #ifdef SUN_FIXED_LBRAC_BUG
2777 if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
2779 /* Patch current LBRAC pc value to match last handy pc value */
2780 complaint (&symfile_complaints, "bad block start address patched");
2781 valu = last_pc_address;
2784 new = push_context (desc, valu);
2788 /* This "symbol" just indicates the end of an inner lexical
2789 context that was started with N_LBRAC. */
2791 /* Ignore extra outermost context from SunPRO cc and acc. */
2792 if (n_opt_found && desc == 1)
2795 if (block_address_function_relative)
2796 /* Relocate for Sun ELF acc fn-relative syms. */
2797 valu += function_start_offset;
2799 /* On most machines, the block addresses are relative to the
2800 N_SO, the linker did not relocate them (sigh). */
2801 valu += last_source_start_addr;
2803 if (context_stack_depth <= 0)
2805 lbrac_mismatch_complaint (symnum);
2809 new = pop_context ();
2810 if (desc != new->depth)
2811 lbrac_mismatch_complaint (symnum);
2813 /* Some compilers put the variable decls inside of an
2814 LBRAC/RBRAC block. This macro should be nonzero if this
2815 is true. DESC is N_DESC from the N_RBRAC symbol.
2816 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2817 or the GCC2_COMPILED_SYMBOL. */
2818 #if !defined (VARIABLES_INSIDE_BLOCK)
2819 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2822 /* Can only use new->locals as local symbols here if we're in
2823 gcc or on a machine that puts them before the lbrack. */
2824 if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2826 if (local_symbols != NULL)
2828 /* GCC development snapshots from March to December of
2829 2000 would output N_LSYM entries after N_LBRAC
2830 entries. As a consequence, these symbols are simply
2831 discarded. Complain if this is the case. Note that
2832 there are some compilers which legitimately put local
2833 symbols within an LBRAC/RBRAC block; this complaint
2834 might also help sort out problems in which
2835 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2836 complaint (&symfile_complaints,
2837 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2839 local_symbols = new->locals;
2842 if (context_stack_depth
2843 > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2845 /* This is not the outermost LBRAC...RBRAC pair in the function,
2846 its local symbols preceded it, and are the ones just recovered
2847 from the context stack. Define the block for them (but don't
2848 bother if the block contains no symbols. Should we complain
2849 on blocks without symbols? I can't think of any useful purpose
2851 if (local_symbols != NULL)
2853 /* Muzzle a compiler bug that makes end < start. (which
2854 compilers? Is this ever harmful?). */
2855 if (new->start_addr > valu)
2857 complaint (&symfile_complaints,
2858 "block start larger than block end");
2859 new->start_addr = valu;
2861 /* Make a block for the local symbols within. */
2862 finish_block (0, &local_symbols, new->old_blocks,
2863 new->start_addr, valu, objfile);
2868 /* This is the outermost LBRAC...RBRAC pair. There is no
2869 need to do anything; leave the symbols that preceded it
2870 to be attached to the function's own block. We need to
2871 indicate that we just moved outside of the function. */
2872 within_function = 0;
2875 if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2876 /* Now pop locals of block just finished. */
2877 local_symbols = new->locals;
2882 /* This kind of symbol indicates the start of an object file. */
2883 /* Relocate for dynamic loading */
2884 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2888 /* This type of symbol indicates the start of data
2889 for one source file.
2890 Finish the symbol table of the previous source file
2891 (if any) and start accumulating a new symbol table. */
2892 /* Relocate for dynamic loading */
2893 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2897 #ifdef SUN_FIXED_LBRAC_BUG
2898 last_pc_address = valu; /* Save for SunOS bug circumcision */
2901 #ifdef PCC_SOL_BROKEN
2902 /* pcc bug, occasionally puts out SO for SOL. */
2903 if (context_stack_depth > 0)
2905 start_subfile (name, NULL);
2909 if (last_source_file)
2911 /* Check if previous symbol was also an N_SO (with some
2912 sanity checks). If so, that one was actually the directory
2913 name, and the current one is the real file name.
2915 if (previous_stab_code == (unsigned char) N_SO)
2917 patch_subfile_names (current_subfile, name);
2918 break; /* Ignore repeated SOs */
2920 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2924 /* Null name means this just marks the end of text for this .o file.
2925 Don't start a new symtab in this case. */
2926 if (*name == '\000')
2929 if (block_address_function_relative)
2930 function_start_offset = 0;
2933 start_symtab (name, NULL, valu);
2934 record_debugformat ("stabs");
2938 /* This type of symbol indicates the start of data for
2939 a sub-source-file, one whose contents were copied or
2940 included in the compilation of the main source file
2941 (whose name was given in the N_SO symbol.) */
2942 /* Relocate for dynamic loading */
2943 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2944 start_subfile (name, current_subfile->dirname);
2949 add_new_header_file (name, valu);
2950 start_subfile (name, current_subfile->dirname);
2954 start_subfile (pop_subfile (), current_subfile->dirname);
2958 add_old_header_file (name, valu);
2962 /* This type of "symbol" really just records
2963 one line-number -- core-address correspondence.
2964 Enter it in the line list for this symbol table. */
2966 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2967 valu += function_start_offset;
2969 #ifdef SUN_FIXED_LBRAC_BUG
2970 last_pc_address = valu; /* Save for SunOS bug circumcision */
2972 /* If this is the first SLINE note in the function, record it at
2973 the start of the function instead of at the listed location. */
2974 if (within_function && sline_found_in_function == 0)
2976 record_line (current_subfile, desc, last_function_start);
2977 sline_found_in_function = 1;
2980 record_line (current_subfile, desc, valu);
2984 common_block_start (name, objfile);
2988 common_block_end (objfile);
2991 /* The following symbol types need to have the appropriate offset added
2992 to their value; then we process symbol definitions in the name. */
2994 case N_STSYM: /* Static symbol in data seg */
2995 case N_LCSYM: /* Static symbol in BSS seg */
2996 case N_ROSYM: /* Static symbol in Read-only data seg */
2997 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2998 Solaris2's stabs-in-elf makes *most* symbols relative
2999 but leaves a few absolute (at least for Solaris 2.1 and version
3000 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3001 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3002 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3003 This leaves us no choice but to search for the 'S' or 'V'...
3004 (or pass the whole section_offsets stuff down ONE MORE function
3005 call level, which we really don't want to do). */
3009 /* .o files and NLMs have non-zero text seg offsets, but don't need
3010 their static syms offset in this fashion. XXX - This is really a
3011 crock that should be fixed in the solib handling code so that I
3012 don't have to work around it here. */
3014 if (!symfile_relocatable)
3016 p = strchr (name, ':');
3017 if (p != 0 && p[1] == 'S')
3019 /* The linker relocated it. We don't want to add an
3020 elfstab_offset_sections-type offset, but we *do* want
3021 to add whatever solib.c passed to symbol_file_add as
3022 addr (this is known to affect SunOS4, and I suspect ELF
3023 too). Since elfstab_offset_sections currently does not
3024 muck with the text offset (there is no Ttext.text
3025 symbol), we can get addr from the text offset. If
3026 elfstab_offset_sections ever starts dealing with the
3027 text offset, and we still need to do this, we need to
3028 invent a SECT_OFF_ADDR_KLUDGE or something. */
3029 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3030 goto define_a_symbol;
3033 /* Since it's not the kludge case, re-dispatch to the right handler. */
3043 internal_error (__FILE__, __LINE__, "failed internal consistency check");
3047 case_N_STSYM: /* Static symbol in data seg */
3048 case N_DSLINE: /* Source line number, data seg */
3049 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3050 goto define_a_symbol;
3052 case_N_LCSYM: /* Static symbol in BSS seg */
3053 case N_BSLINE: /* Source line number, bss seg */
3054 /* N_BROWS: overlaps with N_BSLINE */
3055 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3056 goto define_a_symbol;
3058 case_N_ROSYM: /* Static symbol in Read-only data seg */
3059 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3060 goto define_a_symbol;
3062 case N_ENTRY: /* Alternate entry point */
3063 /* Relocate for dynamic loading */
3064 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3065 goto define_a_symbol;
3067 /* The following symbol types we don't know how to process. Handle
3068 them in a "default" way, but complain to people who care. */
3070 case N_CATCH: /* Exception handler catcher */
3071 case N_EHDECL: /* Exception handler name */
3072 case N_PC: /* Global symbol in Pascal */
3073 case N_M2C: /* Modula-2 compilation unit */
3074 /* N_MOD2: overlaps with N_EHDECL */
3075 case N_SCOPE: /* Modula-2 scope information */
3076 case N_ECOML: /* End common (local name) */
3077 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3082 unknown_symtype_complaint (local_hex_string (type));
3085 /* The following symbol types don't need the address field relocated,
3086 since it is either unused, or is absolute. */
3088 case N_GSYM: /* Global variable */
3089 case N_NSYMS: /* Number of symbols (ultrix) */
3090 case N_NOMAP: /* No map? (ultrix) */
3091 case N_RSYM: /* Register variable */
3092 case N_DEFD: /* Modula-2 GNU module dependency */
3093 case N_SSYM: /* Struct or union element */
3094 case N_LSYM: /* Local symbol in stack */
3095 case N_PSYM: /* Parameter variable */
3096 case N_LENG: /* Length of preceding symbol type */
3100 char *colon_pos = strchr (name, ':');
3101 if (colon_pos == NULL)
3104 deftype = colon_pos[1];
3110 function_stab_type = type;
3112 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3113 /* Deal with the SunPRO 3.0 compiler which omits the address
3114 from N_FUN symbols. */
3116 && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
3118 CORE_ADDR minsym_valu =
3119 find_stab_function_addr (name, last_source_file, objfile);
3121 /* find_stab_function_addr will return 0 if the minimal
3122 symbol wasn't found. (Unfortunately, this might also
3123 be a valid address.) Anyway, if it *does* return 0,
3124 it is likely that the value was set correctly to begin
3126 if (minsym_valu != 0)
3131 #ifdef SUN_FIXED_LBRAC_BUG
3132 /* The Sun acc compiler, under SunOS4, puts out
3133 functions with N_GSYM or N_STSYM. The problem is
3134 that the address of the symbol is no good (for N_GSYM
3135 it doesn't even attept an address; for N_STSYM it
3136 puts out an address but then it gets relocated
3137 relative to the data segment, not the text segment).
3138 Currently we can't fix this up later as we do for
3139 some types of symbol in scan_file_globals.
3140 Fortunately we do have a way of finding the address -
3141 we know that the value in last_pc_address is either
3142 the one we want (if we're dealing with the first
3143 function in an object file), or somewhere in the
3144 previous function. This means that we can use the
3145 minimal symbol table to get the address. */
3147 /* Starting with release 3.0, the Sun acc compiler,
3148 under SunOS4, puts out functions with N_FUN and a value
3149 of zero. This gets relocated to the start of the text
3150 segment of the module, which is no good either.
3151 Under SunOS4 we can deal with this as N_SLINE and N_SO
3152 entries contain valid absolute addresses.
3153 Release 3.0 acc also puts out N_OPT entries, which makes
3154 it possible to discern acc from cc or gcc. */
3156 if (type == N_GSYM || type == N_STSYM
3158 && n_opt_found && !block_address_function_relative))
3160 struct minimal_symbol *m;
3161 int l = colon_pos - name;
3163 m = lookup_minimal_symbol_by_pc (last_pc_address);
3164 if (m && strncmp (DEPRECATED_SYMBOL_NAME (m), name, l) == 0
3165 && DEPRECATED_SYMBOL_NAME (m)[l] == '\0')
3166 /* last_pc_address was in this function */
3167 valu = SYMBOL_VALUE (m);
3168 else if (m && DEPRECATED_SYMBOL_NAME (m + 1)
3169 && strncmp (DEPRECATED_SYMBOL_NAME (m + 1), name, l) == 0
3170 && DEPRECATED_SYMBOL_NAME (m + 1)[l] == '\0')
3171 /* last_pc_address was in last function */
3172 valu = SYMBOL_VALUE (m + 1);
3174 /* Not found - use last_pc_address (for finish_block) */
3175 valu = last_pc_address;
3178 last_pc_address = valu; /* Save for SunOS bug circumcision */
3181 if (block_address_function_relative)
3182 /* For Solaris 2.0 compilers, the block addresses and
3183 N_SLINE's are relative to the start of the
3184 function. On normal systems, and when using gcc on
3185 Solaris 2.0, these addresses are just absolute, or
3186 relative to the N_SO, depending on
3187 BLOCK_ADDRESS_ABSOLUTE. */
3188 function_start_offset = valu;
3190 within_function = 1;
3192 if (context_stack_depth > 1)
3194 complaint (&symfile_complaints,
3195 "unmatched N_LBRAC before symtab pos %d", symnum);
3199 if (context_stack_depth > 0)
3201 new = pop_context ();
3202 /* Make a block for the local symbols within. */
3203 finish_block (new->name, &local_symbols, new->old_blocks,
3204 new->start_addr, valu, objfile);
3207 new = push_context (0, valu);
3208 new->name = define_symbol (valu, name, desc, type, objfile);
3212 define_symbol (valu, name, desc, type, objfile);
3218 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3219 for a bunch of other flags, too. Someday we may parse their
3220 flags; for now we ignore theirs and hope they'll ignore ours. */
3221 case N_OPT: /* Solaris 2: Compiler options */
3224 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3226 processing_gcc_compilation = 2;
3227 #if 0 /* Works, but is experimental. -fnf */
3228 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3229 know whether it will use the old style or v3 mangling. */
3230 if (AUTO_DEMANGLING)
3232 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3241 case N_MAIN: /* Name of main routine. */
3242 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3243 it with a symbol file with "main" and without N_MAIN. I'm
3244 not sure exactly what rule to follow but probably something
3245 like: N_MAIN takes precedence over "main" no matter what
3246 objfile it is in; If there is more than one N_MAIN, choose
3247 the one in the symfile_objfile; If there is more than one
3248 N_MAIN within a given objfile, complain() and choose
3249 arbitrarily. (kingdon) */
3251 set_main_name (name);
3254 /* The following symbol types can be ignored. */
3255 case N_OBJ: /* Solaris 2: Object file dir and name */
3256 case N_PATCH: /* Solaris2: Patch Run Time Checker. */
3257 /* N_UNDF: Solaris 2: file separator mark */
3258 /* N_UNDF: -- we will never encounter it, since we only process one
3259 file's symbols at once. */
3260 case N_ENDM: /* Solaris 2: End of module */
3261 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3265 /* '#' is a GNU C extension to allow one symbol to refer to another
3268 Generally this is used so that an alias can refer to its main
3272 /* Initialize symbol reference names and determine if this is
3273 a definition. If symbol reference is being defined, go
3274 ahead and add it. Otherwise, just return sym. */
3279 /* If this stab defines a new reference ID that is not on the
3280 reference list, then put it on the reference list.
3282 We go ahead and advance NAME past the reference, even though
3283 it is not strictly necessary at this time. */
3284 refnum = symbol_reference_defined (&s);
3286 if (!ref_search (refnum))
3287 ref_add (refnum, 0, name, valu);
3292 previous_stab_code = type;
3295 /* FIXME: The only difference between this and elfstab_build_psymtabs
3296 is the call to install_minimal_symbols for elf, and the support for
3297 split sections. If the differences are really that small, the code
3298 should be shared. */
3300 /* Scan and build partial symbols for an coff symbol file.
3301 The coff file has already been processed to get its minimal symbols.
3303 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3306 OBJFILE is the object file we are reading symbols from.
3307 ADDR is the address relative to which the symbols are (e.g.
3308 the base address of the text segment).
3309 MAINLINE is true if we are reading the main symbol
3310 table (as opposed to a shared lib or dynamically loaded file).
3311 TEXTADDR is the address of the text section.
3312 TEXTSIZE is the size of the text section.
3313 STABSECTS is the list of .stab sections in OBJFILE.
3314 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3315 .stabstr section exists.
3317 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3318 adjusted for coff details. */
3321 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
3322 CORE_ADDR textaddr, unsigned int textsize,
3323 struct stab_section_list *stabsects,
3324 file_ptr stabstroffset, unsigned int stabstrsize)
3327 bfd *sym_bfd = objfile->obfd;
3328 char *name = bfd_get_filename (sym_bfd);
3329 struct dbx_symfile_info *info;
3330 unsigned int stabsize;
3332 /* There is already a dbx_symfile_info allocated by our caller.
3333 It might even contain some info from the coff symtab to help us. */
3334 info = objfile->sym_stab_info;
3336 DBX_TEXT_ADDR (objfile) = textaddr;
3337 DBX_TEXT_SIZE (objfile) = textsize;
3339 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3340 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3341 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3343 if (stabstrsize > bfd_get_size (sym_bfd))
3344 error ("ridiculous string table size: %d bytes", stabstrsize);
3345 DBX_STRINGTAB (objfile) = (char *)
3346 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3347 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3349 /* Now read in the string table in one big gulp. */
3351 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3353 perror_with_name (name);
3354 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3355 if (val != stabstrsize)
3356 perror_with_name (name);
3358 stabsread_new_init ();
3359 buildsym_new_init ();
3360 free_header_files ();
3361 init_header_files ();
3363 processing_acc_compilation = 1;
3365 /* In a coff file, we've already installed the minimal symbols that came
3366 from the coff (non-stab) symbol table, so always act like an
3367 incremental load here. */
3368 if (stabsects->next == NULL)
3370 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3371 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3372 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3376 struct stab_section_list *stabsect;
3378 DBX_SYMCOUNT (objfile) = 0;
3379 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3381 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3382 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3385 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3387 symbuf_sections = stabsects->next;
3388 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3392 dbx_symfile_read (objfile, 0);
3395 /* Scan and build partial symbols for an ELF symbol file.
3396 This ELF file has already been processed to get its minimal symbols,
3397 and any DWARF symbols that were in it.
3399 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3402 OBJFILE is the object file we are reading symbols from.
3403 ADDR is the address relative to which the symbols are (e.g.
3404 the base address of the text segment).
3405 MAINLINE is true if we are reading the main symbol
3406 table (as opposed to a shared lib or dynamically loaded file).
3407 STABSECT is the BFD section information for the .stab section.
3408 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3409 .stabstr section exists.
3411 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3412 adjusted for elf details. */
3415 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
3417 file_ptr stabstroffset, unsigned int stabstrsize)
3420 bfd *sym_bfd = objfile->obfd;
3421 char *name = bfd_get_filename (sym_bfd);
3422 struct dbx_symfile_info *info;
3423 struct cleanup *back_to = NULL;
3425 /* There is already a dbx_symfile_info allocated by our caller.
3426 It might even contain some info from the ELF symtab to help us. */
3427 info = objfile->sym_stab_info;
3429 /* Find the first and last text address. dbx_symfile_read seems to
3431 find_text_range (sym_bfd, objfile);
3433 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3434 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3435 DBX_SYMCOUNT (objfile)
3436 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3437 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3438 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3439 DBX_STAB_SECTION (objfile) = stabsect;
3441 if (stabstrsize > bfd_get_size (sym_bfd))
3442 error ("ridiculous string table size: %d bytes", stabstrsize);
3443 DBX_STRINGTAB (objfile) = (char *)
3444 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3445 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3447 /* Now read in the string table in one big gulp. */
3449 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3451 perror_with_name (name);
3452 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3453 if (val != stabstrsize)
3454 perror_with_name (name);
3456 stabsread_new_init ();
3457 buildsym_new_init ();
3458 free_header_files ();
3459 init_header_files ();
3461 processing_acc_compilation = 1;
3464 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3465 stabs_data = symfile_relocate_debug_section (objfile->obfd, stabsect, NULL);
3467 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
3469 /* In an elf file, we've already installed the minimal symbols that came
3470 from the elf (non-stab) symbol table, so always act like an
3471 incremental load here. dbx_symfile_read should not generate any new
3472 minimal symbols, since we will have already read the ELF dynamic symbol
3473 table and normal symbol entries won't be in the ".stab" section; but in
3474 case it does, it will install them itself. */
3475 dbx_symfile_read (objfile, 0);
3478 do_cleanups (back_to);
3481 /* Scan and build partial symbols for a file with special sections for stabs
3482 and stabstrings. The file has already been processed to get its minimal
3483 symbols, and any other symbols that might be necessary to resolve GSYMs.
3485 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3488 OBJFILE is the object file we are reading symbols from.
3489 ADDR is the address relative to which the symbols are (e.g. the base address
3490 of the text segment).
3491 MAINLINE is true if we are reading the main symbol table (as opposed to a
3492 shared lib or dynamically loaded file).
3493 STAB_NAME is the name of the section that contains the stabs.
3494 STABSTR_NAME is the name of the section that contains the stab strings.
3496 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3499 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
3500 char *stabstr_name, char *text_name)
3503 bfd *sym_bfd = objfile->obfd;
3504 char *name = bfd_get_filename (sym_bfd);
3506 asection *stabstrsect;
3507 asection *text_sect;
3509 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3510 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3516 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3517 stab_name, stabstr_name);
3519 objfile->sym_stab_info = (struct dbx_symfile_info *)
3520 xmalloc (sizeof (struct dbx_symfile_info));
3521 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
3523 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3525 error ("Can't find %s section in symbol file", text_name);
3526 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3527 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3529 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3530 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3531 / DBX_SYMBOL_SIZE (objfile);
3532 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3533 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3535 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3536 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
3537 DBX_STRINGTAB (objfile) = (char *)
3538 obstack_alloc (&objfile->objfile_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
3539 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3541 /* Now read in the string table in one big gulp. */
3543 val = bfd_get_section_contents (sym_bfd, /* bfd */
3544 stabstrsect, /* bfd section */
3545 DBX_STRINGTAB (objfile), /* input buffer */
3546 0, /* offset into section */
3547 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
3550 perror_with_name (name);
3552 stabsread_new_init ();
3553 buildsym_new_init ();
3554 free_header_files ();
3555 init_header_files ();
3557 /* Now, do an incremental load */
3559 processing_acc_compilation = 1;
3560 dbx_symfile_read (objfile, 0);
3563 static struct sym_fns aout_sym_fns =
3565 bfd_target_aout_flavour,
3566 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
3567 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3568 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
3569 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
3570 default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
3571 NULL /* next: pointer to next struct sym_fns */
3575 _initialize_dbxread (void)
3577 add_symtab_fns (&aout_sym_fns);