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 /* This macro returns the size field of a minimal symbol, which is normally
68 stored in the "info" field. The macro can be overridden for specific
69 targets (e.g. MIPS16) that use the info field for other purposes. */
71 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
75 /* We put a pointer to this structure in the read_symtab_private field
80 /* Offset within the file symbol table of first local symbol for this
85 /* Length (in bytes) of the section of the symbol table devoted to
86 this file's symbols (actually, the section bracketed may contain
87 more than just this file's symbols). If ldsymlen is 0, the only
88 reason for this thing's existence is the dependency list. Nothing
89 else will happen when it is read in. */
93 /* The size of each symbol in the symbol file (in external form). */
97 /* Further information needed to locate the symbols if they are in
102 int file_string_offset
;
105 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
106 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
107 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
108 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
109 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
110 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
111 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language
= language_unknown
;
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd
*symfile_bfd
;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size
;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset
;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset
;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset
;
143 static unsigned int next_file_string_table_offset
;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable
= 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative
= 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address
;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers
;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1
)
174 complaint (&symfile_complaints
, "unknown symbol type %s", arg1
);
178 lbrac_mismatch_complaint (int arg1
)
180 complaint (&symfile_complaints
,
181 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1
);
185 repeated_header_complaint (const char *arg1
, int arg2
)
187 complaint (&symfile_complaints
,
188 "\"repeated\" header file %s not previously seen, at symtab pos %d",
192 /* find_text_range --- find start and end of loadable code sections
194 The find_text_range function finds the shortest address range that
195 encloses all sections containing executable code, and stores it in
196 objfile's text_addr and text_size members.
198 dbx_symfile_read will use this to finish off the partial symbol
199 table, in some cases. */
202 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
209 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
210 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
212 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
213 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
217 if (sec_start
< start
)
232 error ("Can't find any code sections in symbol file");
234 DBX_TEXT_ADDR (objfile
) = start
;
235 DBX_TEXT_SIZE (objfile
) = end
- start
;
240 /* During initial symbol readin, we need to have a structure to keep
241 track of which psymtabs have which bincls in them. This structure
242 is used during readin to setup the list of dependencies within each
243 partial symbol table. */
245 struct header_file_location
247 char *name
; /* Name of header file */
248 int instance
; /* See above */
249 struct partial_symtab
*pst
; /* Partial symtab that has the
250 BINCL/EINCL defs for this file */
253 /* The actual list and controling variables */
254 static struct header_file_location
*bincl_list
, *next_bincl
;
255 static int bincls_allocated
;
257 /* Local function prototypes */
259 extern void _initialize_dbxread (void);
261 #if 0 /* OBSOLETE CFront */
262 // OBSOLETE static void process_now (struct objfile *);
263 #endif /* OBSOLETE CFront */
265 static void read_ofile_symtab (struct partial_symtab
*);
267 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
269 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
271 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
273 static void read_dbx_symtab (struct objfile
*);
275 static void free_bincl_list (struct objfile
*);
277 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
279 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
281 static void init_bincl_list (int, struct objfile
*);
283 static char *dbx_next_symbol_text (struct objfile
*);
285 static void fill_symbuf (bfd
*);
287 static void dbx_symfile_init (struct objfile
*);
289 static void dbx_new_init (struct objfile
*);
291 static void dbx_symfile_read (struct objfile
*, int);
293 static void dbx_symfile_finish (struct objfile
*);
295 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
297 static void add_new_header_file (char *, int);
299 static void add_old_header_file (char *, int);
301 static void add_this_object_header_file (int);
303 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
305 struct partial_symbol
**,
306 struct partial_symbol
**);
308 /* Free up old header file tables */
311 free_header_files (void)
313 if (this_object_header_files
)
315 xfree (this_object_header_files
);
316 this_object_header_files
= NULL
;
318 n_allocated_this_object_header_files
= 0;
321 /* Allocate new header file tables */
324 init_header_files (void)
326 n_allocated_this_object_header_files
= 10;
327 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
330 /* Add header file number I for this object file
331 at the next successive FILENUM. */
334 add_this_object_header_file (int i
)
336 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
338 n_allocated_this_object_header_files
*= 2;
339 this_object_header_files
340 = (int *) xrealloc ((char *) this_object_header_files
,
341 n_allocated_this_object_header_files
* sizeof (int));
344 this_object_header_files
[n_this_object_header_files
++] = i
;
347 /* Add to this file an "old" header file, one already seen in
348 a previous object file. NAME is the header file's name.
349 INSTANCE is its instance code, to select among multiple
350 symbol tables for the same header file. */
353 add_old_header_file (char *name
, int instance
)
355 register struct header_file
*p
= HEADER_FILES (current_objfile
);
358 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
359 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
361 add_this_object_header_file (i
);
364 repeated_header_complaint (name
, symnum
);
367 /* Add to this file a "new" header file: definitions for its types follow.
368 NAME is the header file's name.
369 Most often this happens only once for each distinct header file,
370 but not necessarily. If it happens more than once, INSTANCE has
371 a different value each time, and references to the header file
372 use INSTANCE values to select among them.
374 dbx output contains "begin" and "end" markers for each new header file,
375 but at this level we just need to know which files there have been;
376 so we record the file when its "begin" is seen and ignore the "end". */
379 add_new_header_file (char *name
, int instance
)
382 register struct header_file
*hfile
;
384 /* Make sure there is room for one more header file. */
386 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
388 if (N_HEADER_FILES (current_objfile
) == i
)
392 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
393 HEADER_FILES (current_objfile
) = (struct header_file
*)
394 xmalloc (10 * sizeof (struct header_file
));
399 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
400 HEADER_FILES (current_objfile
) = (struct header_file
*)
401 xrealloc ((char *) HEADER_FILES (current_objfile
),
402 (i
* sizeof (struct header_file
)));
406 /* Create an entry for this header file. */
408 i
= N_HEADER_FILES (current_objfile
)++;
409 hfile
= HEADER_FILES (current_objfile
) + i
;
410 hfile
->name
= savestring (name
, strlen (name
));
411 hfile
->instance
= instance
;
414 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
415 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
417 add_this_object_header_file (i
);
421 static struct type
**
422 explicit_lookup_type (int real_filenum
, int index
)
424 register struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
426 if (index
>= f
->length
)
429 f
->vector
= (struct type
**)
430 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
431 memset (&f
->vector
[f
->length
/ 2],
432 '\0', f
->length
* sizeof (struct type
*) / 2);
434 return &f
->vector
[index
];
439 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
440 struct objfile
*objfile
)
442 enum minimal_symbol_type ms_type
;
444 asection
*bfd_section
;
450 section
= SECT_OFF_TEXT (objfile
);
451 bfd_section
= DBX_TEXT_SECTION (objfile
);
455 section
= SECT_OFF_DATA (objfile
);
456 bfd_section
= DBX_DATA_SECTION (objfile
);
460 section
= SECT_OFF_BSS (objfile
);
461 bfd_section
= DBX_BSS_SECTION (objfile
);
471 section
= SECT_OFF_DATA (objfile
);
472 bfd_section
= DBX_DATA_SECTION (objfile
);
475 /* I don't think this type actually exists; since a N_SETV is the result
476 of going over many .o files, it doesn't make sense to have one
478 ms_type
= mst_file_data
;
479 section
= SECT_OFF_DATA (objfile
);
480 bfd_section
= DBX_DATA_SECTION (objfile
);
487 ms_type
= mst_file_text
;
488 section
= SECT_OFF_TEXT (objfile
);
489 bfd_section
= DBX_TEXT_SECTION (objfile
);
492 ms_type
= mst_file_data
;
494 /* Check for __DYNAMIC, which is used by Sun shared libraries.
495 Record it as global even if it's local, not global, so
496 lookup_minimal_symbol can find it. We don't check symbol_leading_char
497 because for SunOS4 it always is '_'. */
498 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
501 /* Same with virtual function tables, both global and static. */
503 char *tempstring
= name
;
504 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
506 if (is_vtable_name (tempstring
))
509 section
= SECT_OFF_DATA (objfile
);
510 bfd_section
= DBX_DATA_SECTION (objfile
);
513 ms_type
= mst_file_bss
;
514 section
= SECT_OFF_BSS (objfile
);
515 bfd_section
= DBX_BSS_SECTION (objfile
);
518 ms_type
= mst_unknown
;
524 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
525 && address
< lowest_text_address
)
526 lowest_text_address
= address
;
528 prim_record_minimal_symbol_and_info
529 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
532 /* Scan and build partial symbols for a symbol file.
533 We have been initialized by a call to dbx_symfile_init, which
534 put all the relevant info into a "struct dbx_symfile_info",
535 hung off the objfile structure.
537 MAINLINE is true if we are reading the main symbol
538 table (as opposed to a shared lib or dynamically loaded file). */
541 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
545 struct cleanup
*back_to
;
547 sym_bfd
= objfile
->obfd
;
549 /* .o and .nlm files are relocatables with text, data and bss segs based at
550 0. This flag disables special (Solaris stabs-in-elf only) fixups for
551 symbols with a value of 0. */
553 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
555 /* This is true for Solaris (and all other systems which put stabs
556 in sections, hopefully, since it would be silly to do things
557 differently from Solaris), and false for SunOS4 and other a.out
559 block_address_function_relative
=
560 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
561 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
562 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
563 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
564 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
565 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
567 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
569 perror_with_name (objfile
->name
);
571 /* If we are reinitializing, or if we have never loaded syms yet, init */
573 || (objfile
->global_psymbols
.size
== 0
574 && objfile
->static_psymbols
.size
== 0))
575 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
577 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
578 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
580 free_pending_blocks ();
581 back_to
= make_cleanup (really_free_pendings
, 0);
583 init_minimal_symbol_collection ();
584 make_cleanup_discard_minimal_symbols ();
586 /* Read stabs data from executable file and define symbols. */
588 read_dbx_symtab (objfile
);
590 /* Add the dynamic symbols. */
592 read_dbx_dynamic_symtab (objfile
);
594 /* Install any minimal symbols that have been collected as the current
595 minimal symbols for this objfile. */
597 install_minimal_symbols (objfile
);
599 do_cleanups (back_to
);
602 /* Initialize anything that needs initializing when a completely new
603 symbol file is specified (not just adding some symbols from another
604 file, e.g. a shared library). */
607 dbx_new_init (struct objfile
*ignore
)
609 stabsread_new_init ();
610 buildsym_new_init ();
611 init_header_files ();
615 /* dbx_symfile_init ()
616 is the dbx-specific initialization routine for reading symbols.
617 It is passed a struct objfile which contains, among other things,
618 the BFD for the file whose symbols are being read, and a slot for a pointer
619 to "private data" which we fill with goodies.
621 We read the string table into malloc'd space and stash a pointer to it.
623 Since BFD doesn't know how to read debug symbols in a format-independent
624 way (and may never do so...), we have to do it ourselves. We will never
625 be called unless this is an a.out (or very similar) file.
626 FIXME, there should be a cleaner peephole into the BFD environment here. */
628 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
631 dbx_symfile_init (struct objfile
*objfile
)
634 bfd
*sym_bfd
= objfile
->obfd
;
635 char *name
= bfd_get_filename (sym_bfd
);
637 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
639 /* Allocate struct to keep track of the symfile */
640 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
641 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
642 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
644 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
645 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
646 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
648 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
649 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
650 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
652 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
654 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
656 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
658 error ("Can't find .text section in symbol file");
659 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
660 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
662 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
663 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
664 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
666 /* Read the string table and stash it away in the psymbol_obstack. It is
667 only needed as long as we need to expand psymbols into full symbols,
668 so when we blow away the psymbol the string table goes away as well.
669 Note that gdb used to use the results of attempting to malloc the
670 string table, based on the size it read, as a form of sanity check
671 for botched byte swapping, on the theory that a byte swapped string
672 table size would be so totally bogus that the malloc would fail. Now
673 that we put in on the psymbol_obstack, we can't do this since gdb gets
674 a fatal error (out of virtual memory) if the size is bogus. We can
675 however at least check to see if the size is less than the size of
676 the size field itself, or larger than the size of the entire file.
677 Note that all valid string tables have a size greater than zero, since
678 the bytes used to hold the size are included in the count. */
680 if (STRING_TABLE_OFFSET
== 0)
682 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
683 will never be zero, even when there is no string table. This
684 would appear to be a bug in bfd. */
685 DBX_STRINGTAB_SIZE (objfile
) = 0;
686 DBX_STRINGTAB (objfile
) = NULL
;
690 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
692 perror_with_name (name
);
694 memset (size_temp
, 0, sizeof (size_temp
));
695 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
698 perror_with_name (name
);
702 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
703 EOF if there is no string table, and attempting to read the size
704 from EOF will read zero bytes. */
705 DBX_STRINGTAB_SIZE (objfile
) = 0;
706 DBX_STRINGTAB (objfile
) = NULL
;
710 /* Read some data that would appear to be the string table size.
711 If there really is a string table, then it is probably the right
712 size. Byteswap if necessary and validate the size. Note that
713 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
714 random data that happened to be at STRING_TABLE_OFFSET, because
715 bfd can't tell us there is no string table, the sanity checks may
716 or may not catch this. */
717 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
719 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
720 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
721 error ("ridiculous string table size (%d bytes).",
722 DBX_STRINGTAB_SIZE (objfile
));
724 DBX_STRINGTAB (objfile
) =
725 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
726 DBX_STRINGTAB_SIZE (objfile
));
727 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
729 /* Now read in the string table in one big gulp. */
731 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
733 perror_with_name (name
);
734 val
= bfd_bread (DBX_STRINGTAB (objfile
),
735 DBX_STRINGTAB_SIZE (objfile
),
737 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
738 perror_with_name (name
);
743 /* Perform any local cleanups required when we are done with a particular
744 objfile. I.E, we are in the process of discarding all symbol information
745 for an objfile, freeing up all memory held for it, and unlinking the
746 objfile struct from the global list of known objfiles. */
749 dbx_symfile_finish (struct objfile
*objfile
)
751 if (objfile
->sym_stab_info
!= NULL
)
753 if (HEADER_FILES (objfile
) != NULL
)
755 register int i
= N_HEADER_FILES (objfile
);
756 register struct header_file
*hfiles
= HEADER_FILES (objfile
);
760 xfree (hfiles
[i
].name
);
761 xfree (hfiles
[i
].vector
);
765 xmfree (objfile
->md
, objfile
->sym_stab_info
);
767 free_header_files ();
771 /* Buffer for reading the symbol table entries. */
772 static struct external_nlist symbuf
[4096];
773 static int symbuf_idx
;
774 static int symbuf_end
;
776 #if 0 /* OBSOLETE CFront */
777 // OBSOLETE /* cont_elem is used for continuing information in cfront.
778 // OBSOLETE It saves information about which types need to be fixed up and
779 // OBSOLETE completed after all the stabs are read. */
780 // OBSOLETE struct cont_elem
782 // OBSOLETE /* sym and stabstring for continuing information in cfront */
783 // OBSOLETE struct symbol *sym;
784 // OBSOLETE char *stabs;
785 // OBSOLETE /* state dependencies (statics that must be preserved) */
786 // OBSOLETE int sym_idx;
787 // OBSOLETE int sym_end;
788 // OBSOLETE int symnum;
789 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
790 // OBSOLETE /* other state dependencies include:
791 // OBSOLETE (assumption is that these will not change since process_now FIXME!!)
792 // OBSOLETE stringtab_global
795 // OBSOLETE symfile_bfd */
798 // OBSOLETE static struct cont_elem *cont_list = 0;
799 // OBSOLETE static int cont_limit = 0;
800 // OBSOLETE static int cont_count = 0;
802 // OBSOLETE /* Arrange for function F to be called with arguments SYM and P later
803 // OBSOLETE in the stabs reading process. */
805 // OBSOLETE process_later (struct symbol *sym, char *p,
806 // OBSOLETE int (*f) (struct objfile *, struct symbol *, char *))
809 // OBSOLETE /* Allocate more space for the deferred list. */
810 // OBSOLETE if (cont_count >= cont_limit - 1)
812 // OBSOLETE cont_limit += 32; /* chunk size */
814 // OBSOLETE cont_list
815 // OBSOLETE = (struct cont_elem *) xrealloc (cont_list,
816 // OBSOLETE (cont_limit
817 // OBSOLETE * sizeof (struct cont_elem)));
818 // OBSOLETE if (!cont_list)
819 // OBSOLETE error ("Virtual memory exhausted\n");
822 // OBSOLETE /* Save state variables so we can process these stabs later. */
823 // OBSOLETE cont_list[cont_count].sym_idx = symbuf_idx;
824 // OBSOLETE cont_list[cont_count].sym_end = symbuf_end;
825 // OBSOLETE cont_list[cont_count].symnum = symnum;
826 // OBSOLETE cont_list[cont_count].sym = sym;
827 // OBSOLETE cont_list[cont_count].stabs = p;
828 // OBSOLETE cont_list[cont_count].func = f;
829 // OBSOLETE cont_count++;
832 // OBSOLETE /* Call deferred funtions in CONT_LIST. */
834 // OBSOLETE static void
835 // OBSOLETE process_now (struct objfile *objfile)
838 // OBSOLETE int save_symbuf_idx;
839 // OBSOLETE int save_symbuf_end;
840 // OBSOLETE int save_symnum;
841 // OBSOLETE struct symbol *sym;
842 // OBSOLETE char *stabs;
844 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
846 // OBSOLETE /* Save the state of our caller, we'll want to restore it before
847 // OBSOLETE returning. */
848 // OBSOLETE save_symbuf_idx = symbuf_idx;
849 // OBSOLETE save_symbuf_end = symbuf_end;
850 // OBSOLETE save_symnum = symnum;
852 // OBSOLETE /* Iterate over all the deferred stabs. */
853 // OBSOLETE for (i = 0; i < cont_count; i++)
855 // OBSOLETE /* Restore the state for this deferred stab. */
856 // OBSOLETE symbuf_idx = cont_list[i].sym_idx;
857 // OBSOLETE symbuf_end = cont_list[i].sym_end;
858 // OBSOLETE symnum = cont_list[i].symnum;
859 // OBSOLETE sym = cont_list[i].sym;
860 // OBSOLETE stabs = cont_list[i].stabs;
861 // OBSOLETE func = cont_list[i].func;
863 // OBSOLETE /* Call the function to handle this deferrd stab. */
864 // OBSOLETE err = (*func) (objfile, sym, stabs);
866 // OBSOLETE error ("Internal error: unable to resolve stab.\n");
869 // OBSOLETE /* Restore our caller's state. */
870 // OBSOLETE symbuf_idx = save_symbuf_idx;
871 // OBSOLETE symbuf_end = save_symbuf_end;
872 // OBSOLETE symnum = save_symnum;
873 // OBSOLETE cont_count = 0;
875 #endif /* OBSOLETE CFront */
877 /* Name of last function encountered. Used in Solaris to approximate
878 object file boundaries. */
879 static char *last_function_name
;
881 /* The address in memory of the string table of the object file we are
882 reading (which might not be the "main" object file, but might be a
883 shared library or some other dynamically loaded thing). This is
884 set by read_dbx_symtab when building psymtabs, and by
885 read_ofile_symtab when building symtabs, and is used only by
886 next_symbol_text. FIXME: If that is true, we don't need it when
887 building psymtabs, right? */
888 static char *stringtab_global
;
890 /* These variables are used to control fill_symbuf when the stabs
891 symbols are not contiguous (as may be the case when a COFF file is
892 linked using --split-by-reloc). */
893 static struct stab_section_list
*symbuf_sections
;
894 static unsigned int symbuf_left
;
895 static unsigned int symbuf_read
;
897 /* This variable stores a global stabs buffer, if we read stabs into
898 memory in one chunk in order to process relocations. */
899 static bfd_byte
*stabs_data
;
901 /* Refill the symbol table input buffer
902 and set the variables that control fetching entries from it.
903 Reports an error if no data available.
904 This function can read past the end of the symbol table
905 (into the string table) but this does no harm. */
908 fill_symbuf (bfd
*sym_bfd
)
915 nbytes
= sizeof (symbuf
);
916 if (nbytes
> symbuf_left
)
917 nbytes
= symbuf_left
;
918 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
920 else if (symbuf_sections
== NULL
)
922 count
= sizeof (symbuf
);
923 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
927 if (symbuf_left
<= 0)
929 file_ptr filepos
= symbuf_sections
->section
->filepos
;
930 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
931 perror_with_name (bfd_get_filename (sym_bfd
));
932 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
933 symbol_table_offset
= filepos
- symbuf_read
;
934 symbuf_sections
= symbuf_sections
->next
;
938 if (count
> sizeof (symbuf
))
939 count
= sizeof (symbuf
);
940 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
944 perror_with_name (bfd_get_filename (sym_bfd
));
945 else if (nbytes
== 0)
946 error ("Premature end of file reading symbol table");
947 symbuf_end
= nbytes
/ symbol_size
;
949 symbuf_left
-= nbytes
;
950 symbuf_read
+= nbytes
;
954 stabs_seek (int sym_offset
)
958 symbuf_read
+= sym_offset
;
959 symbuf_left
-= sym_offset
;
962 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
965 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
967 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
968 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
969 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
970 if (bfd_get_sign_extend_vma (abfd)) \
971 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
973 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
976 /* Invariant: The symbol pointed to by symbuf_idx is the first one
977 that hasn't been swapped. Swap the symbol at the same time
978 that symbuf_idx is incremented. */
980 /* dbx allows the text of a symbol name to be continued into the
981 next symbol name! When such a continuation is encountered
982 (a \ at the end of the text of a name)
983 call this function to get the continuation. */
986 dbx_next_symbol_text (struct objfile
*objfile
)
988 struct internal_nlist nlist
;
990 if (symbuf_idx
== symbuf_end
)
991 fill_symbuf (symfile_bfd
);
994 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
995 OBJSTAT (objfile
, n_stabs
++);
999 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
1002 /* Initialize the list of bincls to contain none and have some
1006 init_bincl_list (int number
, struct objfile
*objfile
)
1008 bincls_allocated
= number
;
1009 next_bincl
= bincl_list
= (struct header_file_location
*)
1010 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
1013 /* Add a bincl to the list. */
1016 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
1018 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1020 int offset
= next_bincl
- bincl_list
;
1021 bincls_allocated
*= 2;
1022 bincl_list
= (struct header_file_location
*)
1023 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
1024 bincls_allocated
* sizeof (struct header_file_location
));
1025 next_bincl
= bincl_list
+ offset
;
1027 next_bincl
->pst
= pst
;
1028 next_bincl
->instance
= instance
;
1029 next_bincl
++->name
= name
;
1032 /* Given a name, value pair, find the corresponding
1033 bincl in the list. Return the partial symtab associated
1034 with that header_file_location. */
1036 static struct partial_symtab
*
1037 find_corresponding_bincl_psymtab (char *name
, int instance
)
1039 struct header_file_location
*bincl
;
1041 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1042 if (bincl
->instance
== instance
1043 && STREQ (name
, bincl
->name
))
1046 repeated_header_complaint (name
, symnum
);
1047 return (struct partial_symtab
*) 0;
1050 /* Free the storage allocated for the bincl list. */
1053 free_bincl_list (struct objfile
*objfile
)
1055 xmfree (objfile
->md
, bincl_list
);
1056 bincls_allocated
= 0;
1060 do_free_bincl_list_cleanup (void *objfile
)
1062 free_bincl_list (objfile
);
1065 static struct cleanup
*
1066 make_cleanup_free_bincl_list (struct objfile
*objfile
)
1068 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
1071 /* Set namestring based on nlist. If the string table index is invalid,
1072 give a fake name, and print a single error message per symbol file read,
1073 rather than abort the symbol reading or flood the user with messages. */
1076 set_namestring (struct objfile
*objfile
, struct internal_nlist nlist
)
1080 if (((unsigned) nlist
.n_strx
+ file_string_table_offset
) >=
1081 DBX_STRINGTAB_SIZE (objfile
))
1083 complaint (&symfile_complaints
, "bad string table offset in symbol %d",
1085 namestring
= "<bad string table offset>";
1088 namestring
= nlist
.n_strx
+ file_string_table_offset
+
1089 DBX_STRINGTAB (objfile
);
1093 /* Scan a SunOs dynamic symbol table for symbols of interest and
1094 add them to the minimal symbol table. */
1097 read_dbx_dynamic_symtab (struct objfile
*objfile
)
1099 bfd
*abfd
= objfile
->obfd
;
1100 struct cleanup
*back_to
;
1110 CORE_ADDR sym_value
;
1113 /* Check that the symbol file has dynamic symbols that we know about.
1114 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1115 on a sun4 host (and vice versa) and bfd is not configured
1116 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1117 so we ignore the dynamic symbols in this case. */
1118 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1119 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1120 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1123 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1124 if (dynsym_size
< 0)
1127 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1128 back_to
= make_cleanup (xfree
, dynsyms
);
1130 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1131 if (dynsym_count
< 0)
1133 do_cleanups (back_to
);
1137 /* Enter dynamic symbols into the minimal symbol table
1138 if this is a stripped executable. */
1139 if (bfd_get_symcount (abfd
) <= 0)
1142 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1144 asymbol
*sym
= *symptr
;
1148 sec
= bfd_get_section (sym
);
1150 /* BFD symbols are section relative. */
1151 sym_value
= sym
->value
+ sec
->vma
;
1153 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1155 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1158 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1160 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1163 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1165 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1171 if (sym
->flags
& BSF_GLOBAL
)
1174 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1179 /* Symbols from shared libraries have a dynamic relocation entry
1180 that points to the associated slot in the procedure linkage table.
1181 We make a mininal symbol table entry with type mst_solib_trampoline
1182 at the address in the procedure linkage table. */
1183 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1184 if (dynrel_size
< 0)
1186 do_cleanups (back_to
);
1190 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1191 make_cleanup (xfree
, dynrels
);
1193 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1194 if (dynrel_count
< 0)
1196 do_cleanups (back_to
);
1200 for (counter
= 0, relptr
= dynrels
;
1201 counter
< dynrel_count
;
1202 counter
++, relptr
++)
1204 arelent
*rel
= *relptr
;
1206 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1208 switch (bfd_get_arch (abfd
))
1210 case bfd_arch_sparc
:
1211 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1215 /* `16' is the type BFD produces for a jump table relocation. */
1216 if (rel
->howto
->type
!= 16)
1219 /* Adjust address in the jump table to point to
1220 the start of the bsr instruction. */
1227 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1228 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1232 do_cleanups (back_to
);
1235 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1237 find_stab_function_addr (char *namestring
, char *filename
,
1238 struct objfile
*objfile
)
1240 struct minimal_symbol
*msym
;
1244 p
= strchr (namestring
, ':');
1249 strncpy (p
, namestring
, n
);
1252 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1255 /* Sun Fortran appends an underscore to the minimal symbol name,
1256 try again with an appended underscore if the minimal symbol
1260 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1263 if (msym
== NULL
&& filename
!= NULL
)
1265 /* Try again without the filename. */
1267 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1269 if (msym
== NULL
&& filename
!= NULL
)
1271 /* And try again for Sun Fortran, but without the filename. */
1274 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1277 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1279 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1282 function_outside_compilation_unit_complaint (const char *arg1
)
1284 complaint (&symfile_complaints
,
1285 "function `%s' appears to be defined outside of all compilation units",
1289 /* Setup partial_symtab's describing each source file for which
1290 debugging information is available. */
1293 read_dbx_symtab (struct objfile
*objfile
)
1295 register struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1296 struct internal_nlist nlist
;
1297 CORE_ADDR text_addr
;
1300 register char *namestring
;
1302 int past_first_source_file
= 0;
1303 CORE_ADDR last_o_file_start
= 0;
1304 CORE_ADDR last_function_start
= 0;
1305 struct cleanup
*back_to
;
1307 int textlow_not_set
;
1308 int data_sect_index
;
1310 /* Current partial symtab */
1311 struct partial_symtab
*pst
;
1313 /* List of current psymtab's include files */
1314 char **psymtab_include_list
;
1315 int includes_allocated
;
1318 /* Index within current psymtab dependency list */
1319 struct partial_symtab
**dependency_list
;
1320 int dependencies_used
, dependencies_allocated
;
1322 text_addr
= DBX_TEXT_ADDR (objfile
);
1323 text_size
= DBX_TEXT_SIZE (objfile
);
1325 /* FIXME. We probably want to change stringtab_global rather than add this
1326 while processing every symbol entry. FIXME. */
1327 file_string_table_offset
= 0;
1328 next_file_string_table_offset
= 0;
1330 stringtab_global
= DBX_STRINGTAB (objfile
);
1332 pst
= (struct partial_symtab
*) 0;
1334 includes_allocated
= 30;
1336 psymtab_include_list
= (char **) alloca (includes_allocated
*
1339 dependencies_allocated
= 30;
1340 dependencies_used
= 0;
1342 (struct partial_symtab
**) alloca (dependencies_allocated
*
1343 sizeof (struct partial_symtab
*));
1345 /* Init bincl list */
1346 init_bincl_list (20, objfile
);
1347 back_to
= make_cleanup_free_bincl_list (objfile
);
1349 last_source_file
= NULL
;
1351 lowest_text_address
= (CORE_ADDR
) -1;
1353 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1354 abfd
= objfile
->obfd
;
1355 symbuf_end
= symbuf_idx
= 0;
1356 next_symbol_text_func
= dbx_next_symbol_text
;
1357 textlow_not_set
= 1;
1358 has_line_numbers
= 0;
1360 /* If the objfile has no .data section, try using the .bss section. */
1361 data_sect_index
= objfile
->sect_index_data
;
1362 if (data_sect_index
== -1)
1363 data_sect_index
= SECT_OFF_BSS (objfile
);
1364 gdb_assert (data_sect_index
!= -1);
1366 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1368 /* Get the symbol for this run and pull out some info */
1369 QUIT
; /* allow this to be interruptable */
1370 if (symbuf_idx
== symbuf_end
)
1372 bufp
= &symbuf
[symbuf_idx
++];
1375 * Special case to speed up readin.
1377 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1379 has_line_numbers
= 1;
1383 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1384 OBJSTAT (objfile
, n_stabs
++);
1386 /* Ok. There is a lot of code duplicated in the rest of this
1387 switch statement (for efficiency reasons). Since I don't
1388 like duplicating code, I will do my penance here, and
1389 describe the code which is duplicated:
1391 *) The assignment to namestring.
1392 *) The call to strchr.
1393 *) The addition of a partial symbol the the two partial
1394 symbol lists. This last is a large section of code, so
1395 I've imbedded it in the following macro.
1398 switch (nlist
.n_type
)
1402 * Standard, external, non-debugger, symbols
1405 case N_TEXT
| N_EXT
:
1406 case N_NBTEXT
| N_EXT
:
1407 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1410 case N_DATA
| N_EXT
:
1411 case N_NBDATA
| N_EXT
:
1412 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1417 case N_NBBSS
| N_EXT
:
1418 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1419 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1424 namestring
= set_namestring (objfile
, nlist
);
1427 record_minimal_symbol (namestring
, nlist
.n_value
,
1428 nlist
.n_type
, objfile
); /* Always */
1431 /* Standard, local, non-debugger, symbols */
1435 /* We need to be able to deal with both N_FN or N_TEXT,
1436 because we have no way of knowing whether the sys-supplied ld
1437 or GNU ld was used to make the executable. Sequents throw
1438 in another wrinkle -- they renumbered N_FN. */
1443 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1444 namestring
= set_namestring (objfile
, nlist
);
1446 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1447 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1448 && namestring
[nsl
- 2] == '.'))
1450 if (objfile
->ei
.entry_point
< nlist
.n_value
&&
1451 objfile
->ei
.entry_point
>= last_o_file_start
)
1453 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
1454 objfile
->ei
.entry_file_highpc
= nlist
.n_value
;
1456 if (past_first_source_file
&& pst
1457 /* The gould NP1 uses low values for .o and -l symbols
1458 which are not the address. */
1459 && nlist
.n_value
>= pst
->textlow
)
1461 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1462 symnum
* symbol_size
,
1463 nlist
.n_value
> pst
->texthigh
1464 ? nlist
.n_value
: pst
->texthigh
,
1465 dependency_list
, dependencies_used
, textlow_not_set
);
1466 pst
= (struct partial_symtab
*) 0;
1468 dependencies_used
= 0;
1471 past_first_source_file
= 1;
1472 last_o_file_start
= nlist
.n_value
;
1479 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1482 case N_UNDF
| N_EXT
:
1483 if (nlist
.n_value
!= 0)
1485 /* This is a "Fortran COMMON" symbol. See if the target
1486 environment knows where it has been relocated to. */
1490 namestring
= set_namestring (objfile
, nlist
);
1491 if (target_lookup_symbol (namestring
, &reladdr
))
1493 continue; /* Error in lookup; ignore symbol for now. */
1495 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1496 nlist
.n_value
= reladdr
;
1497 goto bss_ext_symbol
;
1499 continue; /* Just undefined, not COMMON */
1502 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1504 /* Deal with relative offsets in the string table
1505 used in ELF+STAB under Solaris. If we want to use the
1506 n_strx field, which contains the name of the file,
1507 we must adjust file_string_table_offset *before* calling
1508 set_namestring(). */
1509 past_first_source_file
= 1;
1510 file_string_table_offset
= next_file_string_table_offset
;
1511 next_file_string_table_offset
=
1512 file_string_table_offset
+ nlist
.n_value
;
1513 if (next_file_string_table_offset
< file_string_table_offset
)
1514 error ("string table offset backs up at %d", symnum
);
1515 /* FIXME -- replace error() with complaint. */
1520 /* Lots of symbol types we can just ignore. */
1527 /* Keep going . . . */
1530 * Special symbol types for GNU
1533 case N_INDR
| N_EXT
:
1535 case N_SETA
| N_EXT
:
1537 case N_SETT
| N_EXT
:
1539 case N_SETD
| N_EXT
:
1541 case N_SETB
| N_EXT
:
1552 static int prev_so_symnum
= -10;
1553 static int first_so_symnum
;
1555 int prev_textlow_not_set
;
1557 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1559 prev_textlow_not_set
= textlow_not_set
;
1561 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1562 /* A zero value is probably an indication for the SunPRO 3.0
1563 compiler. end_psymtab explicitly tests for zero, so
1564 don't relocate it. */
1566 if (nlist
.n_value
== 0)
1568 textlow_not_set
= 1;
1572 textlow_not_set
= 0;
1574 textlow_not_set
= 0;
1576 past_first_source_file
= 1;
1578 if (prev_so_symnum
!= symnum
- 1)
1579 { /* Here if prev stab wasn't N_SO */
1580 first_so_symnum
= symnum
;
1584 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1585 symnum
* symbol_size
,
1586 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1587 dependency_list
, dependencies_used
,
1588 prev_textlow_not_set
);
1589 pst
= (struct partial_symtab
*) 0;
1591 dependencies_used
= 0;
1595 prev_so_symnum
= symnum
;
1597 /* End the current partial symtab and start a new one */
1599 namestring
= set_namestring (objfile
, nlist
);
1601 /* Null name means end of .o file. Don't start a new one. */
1602 if (*namestring
== '\000')
1605 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1606 The first one is a directory name; the second the file name.
1607 If pst exists, is empty, and has a filename ending in '/',
1608 we assume the previous N_SO was a directory name. */
1610 p
= strrchr (namestring
, '/');
1611 if (p
&& *(p
+ 1) == '\000')
1612 continue; /* Simply ignore directory name SOs */
1614 /* Some other compilers (C++ ones in particular) emit useless
1615 SOs for non-existant .c files. We ignore all subsequent SOs that
1616 immediately follow the first. */
1619 pst
= start_psymtab (objfile
,
1621 first_so_symnum
* symbol_size
,
1622 objfile
->global_psymbols
.next
,
1623 objfile
->static_psymbols
.next
);
1629 enum language tmp_language
;
1630 /* Add this bincl to the bincl_list for future EXCLs. No
1631 need to save the string; it'll be around until
1632 read_dbx_symtab function returns */
1634 namestring
= set_namestring (objfile
, nlist
);
1635 tmp_language
= deduce_language_from_filename (namestring
);
1637 /* Only change the psymtab's language if we've learned
1638 something useful (eg. tmp_language is not language_unknown).
1639 In addition, to match what start_subfile does, never change
1641 if (tmp_language
!= language_unknown
1642 && (tmp_language
!= language_c
1643 || psymtab_language
!= language_cplus
))
1644 psymtab_language
= tmp_language
;
1648 /* FIXME: we should not get here without a PST to work on.
1649 Attempt to recover. */
1650 complaint (&symfile_complaints
,
1651 "N_BINCL %s not in entries for any file, at symtab pos %d",
1652 namestring
, symnum
);
1655 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1657 /* Mark down an include file in the current psymtab */
1659 goto record_include_file
;
1664 enum language tmp_language
;
1665 /* Mark down an include file in the current psymtab */
1667 namestring
= set_namestring (objfile
, nlist
);
1668 tmp_language
= deduce_language_from_filename (namestring
);
1670 /* Only change the psymtab's language if we've learned
1671 something useful (eg. tmp_language is not language_unknown).
1672 In addition, to match what start_subfile does, never change
1674 if (tmp_language
!= language_unknown
1675 && (tmp_language
!= language_c
1676 || psymtab_language
!= language_cplus
))
1677 psymtab_language
= tmp_language
;
1679 /* In C++, one may expect the same filename to come round many
1680 times, when code is coming alternately from the main file
1681 and from inline functions in other files. So I check to see
1682 if this is a file we've seen before -- either the main
1683 source file, or a previously included file.
1685 This seems to be a lot of time to be spending on N_SOL, but
1686 things like "break c-exp.y:435" need to work (I
1687 suppose the psymtab_include_list could be hashed or put
1688 in a binary tree, if profiling shows this is a major hog). */
1689 if (pst
&& STREQ (namestring
, pst
->filename
))
1693 for (i
= 0; i
< includes_used
; i
++)
1694 if (STREQ (namestring
, psymtab_include_list
[i
]))
1703 record_include_file
:
1705 psymtab_include_list
[includes_used
++] = namestring
;
1706 if (includes_used
>= includes_allocated
)
1708 char **orig
= psymtab_include_list
;
1710 psymtab_include_list
= (char **)
1711 alloca ((includes_allocated
*= 2) *
1713 memcpy (psymtab_include_list
, orig
,
1714 includes_used
* sizeof (char *));
1718 case N_LSYM
: /* Typedef or automatic variable. */
1719 case N_STSYM
: /* Data seg var -- static */
1720 case N_LCSYM
: /* BSS " */
1721 case N_ROSYM
: /* Read-only data seg var -- static. */
1722 case N_NBSTS
: /* Gould nobase. */
1723 case N_NBLCS
: /* symbols. */
1725 case N_GSYM
: /* Global (extern) variable; can be
1726 data or bss (sigh FIXME). */
1728 /* Following may probably be ignored; I'll leave them here
1729 for now (until I do Pascal and Modula 2 extensions). */
1731 case N_PC
: /* I may or may not need this; I
1733 case N_M2C
: /* I suspect that I can ignore this here. */
1734 case N_SCOPE
: /* Same. */
1736 namestring
= set_namestring (objfile
, nlist
);
1738 /* See if this is an end of function stab. */
1739 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1743 /* It's value is the size (in bytes) of the function for
1744 function relative stabs, or the address of the function's
1745 end for old style stabs. */
1746 valu
= nlist
.n_value
+ last_function_start
;
1747 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1748 pst
->texthigh
= valu
;
1752 p
= (char *) strchr (namestring
, ':');
1754 continue; /* Not a debugging symbol. */
1758 /* Main processing section for debugging symbols which
1759 the initial read through the symbol tables needs to worry
1760 about. If we reach this point, the symbol which we are
1761 considering is definitely one we are interested in.
1762 p must also contain the (valid) index into the namestring
1763 which indicates the debugging type symbol. */
1768 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1769 #ifdef STATIC_TRANSFORM_NAME
1770 namestring
= STATIC_TRANSFORM_NAME (namestring
);
1772 add_psymbol_to_list (namestring
, p
- namestring
,
1773 VAR_DOMAIN
, LOC_STATIC
,
1774 &objfile
->static_psymbols
,
1776 psymtab_language
, objfile
);
1779 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1780 /* The addresses in these entries are reported to be
1781 wrong. See the code that reads 'G's for symtabs. */
1782 add_psymbol_to_list (namestring
, p
- namestring
,
1783 VAR_DOMAIN
, LOC_STATIC
,
1784 &objfile
->global_psymbols
,
1786 psymtab_language
, objfile
);
1790 /* When a 'T' entry is defining an anonymous enum, it
1791 may have a name which is the empty string, or a
1792 single space. Since they're not really defining a
1793 symbol, those shouldn't go in the partial symbol
1794 table. We do pick up the elements of such enums at
1795 'check_enum:', below. */
1796 if (p
>= namestring
+ 2
1797 || (p
== namestring
+ 1
1798 && namestring
[0] != ' '))
1800 add_psymbol_to_list (namestring
, p
- namestring
,
1801 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1802 &objfile
->static_psymbols
,
1804 psymtab_language
, objfile
);
1807 /* Also a typedef with the same name. */
1808 add_psymbol_to_list (namestring
, p
- namestring
,
1809 VAR_DOMAIN
, LOC_TYPEDEF
,
1810 &objfile
->static_psymbols
,
1812 psymtab_language
, objfile
);
1815 #if 0 /* OBSOLETE CFront */
1816 // OBSOLETE /* The semantics of C++ state that "struct foo { ... }"
1817 // OBSOLETE also defines a typedef for "foo". Unfortuantely, cfront
1818 // OBSOLETE never makes the typedef when translating from C++ to C.
1819 // OBSOLETE We make the typedef here so that "ptype foo" works as
1820 // OBSOLETE expected for cfront translated code. */
1821 // OBSOLETE else if (psymtab_language == language_cplus)
1823 // OBSOLETE /* Also a typedef with the same name. */
1824 // OBSOLETE add_psymbol_to_list (namestring, p - namestring,
1825 // OBSOLETE VAR_DOMAIN, LOC_TYPEDEF,
1826 // OBSOLETE &objfile->static_psymbols,
1827 // OBSOLETE nlist.n_value, 0,
1828 // OBSOLETE psymtab_language, objfile);
1830 #endif /* OBSOLETE CFront */
1834 if (p
!= namestring
) /* a name is there, not just :T... */
1836 add_psymbol_to_list (namestring
, p
- namestring
,
1837 VAR_DOMAIN
, LOC_TYPEDEF
,
1838 &objfile
->static_psymbols
,
1840 psymtab_language
, objfile
);
1843 /* If this is an enumerated type, we need to
1844 add all the enum constants to the partial symbol
1845 table. This does not cover enums without names, e.g.
1846 "enum {a, b} c;" in C, but fortunately those are
1847 rare. There is no way for GDB to find those from the
1848 enum type without spending too much time on it. Thus
1849 to solve this problem, the compiler needs to put out the
1850 enum in a nameless type. GCC2 does this. */
1852 /* We are looking for something of the form
1853 <name> ":" ("t" | "T") [<number> "="] "e"
1854 {<constant> ":" <value> ","} ";". */
1856 /* Skip over the colon and the 't' or 'T'. */
1858 /* This type may be given a number. Also, numbers can come
1859 in pairs like (0,26). Skip over it. */
1860 while ((*p
>= '0' && *p
<= '9')
1861 || *p
== '(' || *p
== ',' || *p
== ')'
1867 /* The aix4 compiler emits extra crud before the members. */
1870 /* Skip over the type (?). */
1874 /* Skip over the colon. */
1878 /* We have found an enumerated type. */
1879 /* According to comments in read_enum_type
1880 a comma could end it instead of a semicolon.
1881 I don't know where that happens.
1883 while (*p
&& *p
!= ';' && *p
!= ',')
1887 /* Check for and handle cretinous dbx symbol name
1889 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1890 p
= next_symbol_text (objfile
);
1892 /* Point to the character after the name
1893 of the enum constant. */
1894 for (q
= p
; *q
&& *q
!= ':'; q
++)
1896 /* Note that the value doesn't matter for
1897 enum constants in psymtabs, just in symtabs. */
1898 add_psymbol_to_list (p
, q
- p
,
1899 VAR_DOMAIN
, LOC_CONST
,
1900 &objfile
->static_psymbols
, 0,
1901 0, psymtab_language
, objfile
);
1902 /* Point past the name. */
1904 /* Skip over the value. */
1905 while (*p
&& *p
!= ',')
1907 /* Advance past the comma. */
1914 /* Constant, e.g. from "const" in Pascal. */
1915 add_psymbol_to_list (namestring
, p
- namestring
,
1916 VAR_DOMAIN
, LOC_CONST
,
1917 &objfile
->static_psymbols
, nlist
.n_value
,
1918 0, psymtab_language
, objfile
);
1924 int name_len
= p
- namestring
;
1925 char *name
= xmalloc (name_len
+ 1);
1926 memcpy (name
, namestring
, name_len
);
1927 name
[name_len
] = '\0';
1928 function_outside_compilation_unit_complaint (name
);
1931 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1932 /* Kludges for ELF/STABS with Sun ACC */
1933 last_function_name
= namestring
;
1934 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1935 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1936 value for the bottom of the text seg in those cases. */
1937 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1938 SECT_OFF_TEXT (objfile
)))
1940 CORE_ADDR minsym_valu
=
1941 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1942 /* find_stab_function_addr will return 0 if the minimal
1943 symbol wasn't found. (Unfortunately, this might also
1944 be a valid address.) Anyway, if it *does* return 0,
1945 it is likely that the value was set correctly to begin
1947 if (minsym_valu
!= 0)
1948 nlist
.n_value
= minsym_valu
;
1950 if (pst
&& textlow_not_set
)
1952 pst
->textlow
= nlist
.n_value
;
1953 textlow_not_set
= 0;
1958 /* Keep track of the start of the last function so we
1959 can handle end of function symbols. */
1960 last_function_start
= nlist
.n_value
;
1962 /* In reordered executables this function may lie outside
1963 the bounds created by N_SO symbols. If that's the case
1964 use the address of this function as the low bound for
1965 the partial symbol table. */
1968 || (nlist
.n_value
< pst
->textlow
1970 != ANOFFSET (objfile
->section_offsets
,
1971 SECT_OFF_TEXT (objfile
))))))
1973 pst
->textlow
= nlist
.n_value
;
1974 textlow_not_set
= 0;
1976 add_psymbol_to_list (namestring
, p
- namestring
,
1977 VAR_DOMAIN
, LOC_BLOCK
,
1978 &objfile
->static_psymbols
,
1980 psymtab_language
, objfile
);
1983 /* Global functions were ignored here, but now they
1984 are put into the global psymtab like one would expect.
1985 They're also in the minimal symbol table. */
1989 int name_len
= p
- namestring
;
1990 char *name
= xmalloc (name_len
+ 1);
1991 memcpy (name
, namestring
, name_len
);
1992 name
[name_len
] = '\0';
1993 function_outside_compilation_unit_complaint (name
);
1996 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1997 /* Kludges for ELF/STABS with Sun ACC */
1998 last_function_name
= namestring
;
1999 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2000 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
2001 value for the bottom of the text seg in those cases. */
2002 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
2003 SECT_OFF_TEXT (objfile
)))
2005 CORE_ADDR minsym_valu
=
2006 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
2007 /* find_stab_function_addr will return 0 if the minimal
2008 symbol wasn't found. (Unfortunately, this might also
2009 be a valid address.) Anyway, if it *does* return 0,
2010 it is likely that the value was set correctly to begin
2012 if (minsym_valu
!= 0)
2013 nlist
.n_value
= minsym_valu
;
2015 if (pst
&& textlow_not_set
)
2017 pst
->textlow
= nlist
.n_value
;
2018 textlow_not_set
= 0;
2023 /* Keep track of the start of the last function so we
2024 can handle end of function symbols. */
2025 last_function_start
= nlist
.n_value
;
2027 /* In reordered executables this function may lie outside
2028 the bounds created by N_SO symbols. If that's the case
2029 use the address of this function as the low bound for
2030 the partial symbol table. */
2033 || (nlist
.n_value
< pst
->textlow
2035 != ANOFFSET (objfile
->section_offsets
,
2036 SECT_OFF_TEXT (objfile
))))))
2038 pst
->textlow
= nlist
.n_value
;
2039 textlow_not_set
= 0;
2041 add_psymbol_to_list (namestring
, p
- namestring
,
2042 VAR_DOMAIN
, LOC_BLOCK
,
2043 &objfile
->global_psymbols
,
2045 psymtab_language
, objfile
);
2048 /* Two things show up here (hopefully); static symbols of
2049 local scope (static used inside braces) or extensions
2050 of structure symbols. We can ignore both. */
2064 case '#': /* for symbol identification (used in live ranges) */
2065 #if 0 /* OBSOLETE CFront */
2066 // OBSOLETE /* added to support cfront stabs strings */
2067 // OBSOLETE case 'Z': /* for definition continuations */
2068 // OBSOLETE case 'P': /* for prototypes */
2069 #endif /* OBSOLETE CFront */
2073 /* It is a C++ nested symbol. We don't need to record it
2074 (I don't think); if we try to look up foo::bar::baz,
2075 then symbols for the symtab containing foo should get
2076 read in, I think. */
2077 /* Someone says sun cc puts out symbols like
2078 /foo/baz/maclib::/usr/local/bin/maclib,
2079 which would get here with a symbol type of ':'. */
2083 /* Unexpected symbol descriptor. The second and subsequent stabs
2084 of a continued stab can show up here. The question is
2085 whether they ever can mimic a normal stab--it would be
2086 nice if not, since we certainly don't want to spend the
2087 time searching to the end of every string looking for
2090 complaint (&symfile_complaints
, "unknown symbol descriptor `%c'",
2093 /* Ignore it; perhaps it is an extension that we don't
2100 namestring
= set_namestring (objfile
, nlist
);
2102 /* Find the corresponding bincl and mark that psymtab on the
2103 psymtab dependency list */
2105 struct partial_symtab
*needed_pst
=
2106 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2108 /* If this include file was defined earlier in this file,
2110 if (needed_pst
== pst
)
2118 for (i
= 0; i
< dependencies_used
; i
++)
2119 if (dependency_list
[i
] == needed_pst
)
2125 /* If it's already in the list, skip the rest. */
2129 dependency_list
[dependencies_used
++] = needed_pst
;
2130 if (dependencies_used
>= dependencies_allocated
)
2132 struct partial_symtab
**orig
= dependency_list
;
2134 (struct partial_symtab
**)
2135 alloca ((dependencies_allocated
*= 2)
2136 * sizeof (struct partial_symtab
*));
2137 memcpy (dependency_list
, orig
,
2139 * sizeof (struct partial_symtab
*)));
2141 fprintf_unfiltered (gdb_stderr
, "Had to reallocate dependency list.\n");
2142 fprintf_unfiltered (gdb_stderr
, "New dependencies allocated: %d\n",
2143 dependencies_allocated
);
2151 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2152 /* Solaris 2 end of module, finish current partial symbol table.
2153 end_psymtab will set pst->texthigh to the proper value, which
2154 is necessary if a module compiled without debugging info
2155 follows this module. */
2158 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2159 symnum
* symbol_size
,
2161 dependency_list
, dependencies_used
, textlow_not_set
);
2162 pst
= (struct partial_symtab
*) 0;
2164 dependencies_used
= 0;
2171 HANDLE_RBRAC (nlist
.n_value
);
2177 case N_SSYM
: /* Claim: Structure or union element.
2178 Hopefully, I can ignore this. */
2179 case N_ENTRY
: /* Alternate entry point; can ignore. */
2180 case N_MAIN
: /* Can definitely ignore this. */
2181 case N_CATCH
: /* These are GNU C++ extensions */
2182 case N_EHDECL
: /* that can safely be ignored here. */
2192 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2193 case N_DEFD
: /* GNU Modula-2 */
2194 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2196 case N_OBJ
: /* useless types from Solaris */
2198 /* These symbols aren't interesting; don't worry about them */
2203 /* If we haven't found it yet, ignore it. It's probably some
2204 new type we don't know about yet. */
2205 unknown_symtype_complaint (local_hex_string (nlist
.n_type
));
2210 /* If there's stuff to be cleaned up, clean it up. */
2211 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
2212 /*FIXME, does this have a bug at start address 0? */
2213 && last_o_file_start
2214 && objfile
->ei
.entry_point
< nlist
.n_value
2215 && objfile
->ei
.entry_point
>= last_o_file_start
)
2217 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
2218 objfile
->ei
.entry_file_highpc
= nlist
.n_value
;
2223 /* Don't set pst->texthigh lower than it already is. */
2224 CORE_ADDR text_end
=
2225 (lowest_text_address
== (CORE_ADDR
) -1
2226 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
2227 : lowest_text_address
)
2230 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2231 symnum
* symbol_size
,
2232 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2233 dependency_list
, dependencies_used
, textlow_not_set
);
2236 do_cleanups (back_to
);
2239 /* Allocate and partially fill a partial symtab. It will be
2240 completely filled at the end of the symbol list.
2242 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2243 is the address relative to which its symbols are (incremental) or 0
2247 static struct partial_symtab
*
2248 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2249 int ldsymoff
, struct partial_symbol
**global_syms
,
2250 struct partial_symbol
**static_syms
)
2252 struct partial_symtab
*result
=
2253 start_psymtab_common (objfile
, objfile
->section_offsets
,
2254 filename
, textlow
, global_syms
, static_syms
);
2256 result
->read_symtab_private
= (char *)
2257 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
2258 LDSYMOFF (result
) = ldsymoff
;
2259 result
->read_symtab
= dbx_psymtab_to_symtab
;
2260 SYMBOL_SIZE (result
) = symbol_size
;
2261 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2262 STRING_OFFSET (result
) = string_table_offset
;
2263 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2265 /* If we're handling an ELF file, drag some section-relocation info
2266 for this source file out of the ELF symbol table, to compensate for
2267 Sun brain death. This replaces the section_offsets in this psymtab,
2269 elfstab_offset_sections (objfile
, result
);
2271 /* Deduce the source language from the filename for this psymtab. */
2272 psymtab_language
= deduce_language_from_filename (filename
);
2277 /* Close off the current usage of PST.
2278 Returns PST or NULL if the partial symtab was empty and thrown away.
2280 FIXME: List variables and peculiarities of same. */
2282 struct partial_symtab
*
2283 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2284 int capping_symbol_offset
, CORE_ADDR capping_text
,
2285 struct partial_symtab
**dependency_list
, int number_dependencies
,
2286 int textlow_not_set
)
2289 struct objfile
*objfile
= pst
->objfile
;
2291 if (capping_symbol_offset
!= -1)
2292 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2293 pst
->texthigh
= capping_text
;
2295 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2296 /* Under Solaris, the N_SO symbols always have a value of 0,
2297 instead of the usual address of the .o file. Therefore,
2298 we have to do some tricks to fill in texthigh and textlow.
2299 The first trick is: if we see a static
2300 or global function, and the textlow for the current pst
2301 is not set (ie: textlow_not_set), then we use that function's
2302 address for the textlow of the pst. */
2304 /* Now, to fill in texthigh, we remember the last function seen
2305 in the .o file. Also, there's a hack in
2306 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2307 to here via the misc_info field. Therefore, we can fill in
2308 a reliable texthigh by taking the address plus size of the
2309 last function in the file. */
2311 if (pst
->texthigh
== 0 && last_function_name
)
2315 struct minimal_symbol
*minsym
;
2317 p
= strchr (last_function_name
, ':');
2319 p
= last_function_name
;
2320 n
= p
- last_function_name
;
2322 strncpy (p
, last_function_name
, n
);
2325 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2328 /* Sun Fortran appends an underscore to the minimal symbol name,
2329 try again with an appended underscore if the minimal symbol
2333 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2337 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2339 last_function_name
= NULL
;
2342 /* this test will be true if the last .o file is only data */
2343 if (textlow_not_set
)
2344 pst
->textlow
= pst
->texthigh
;
2347 struct partial_symtab
*p1
;
2349 /* If we know our own starting text address, then walk through all other
2350 psymtabs for this objfile, and if any didn't know their ending text
2351 address, set it to our starting address. Take care to not set our
2352 own ending address to our starting address, nor to set addresses on
2353 `dependency' files that have both textlow and texthigh zero. */
2355 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2357 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2359 p1
->texthigh
= pst
->textlow
;
2360 /* if this file has only data, then make textlow match texthigh */
2361 if (p1
->textlow
== 0)
2362 p1
->textlow
= p1
->texthigh
;
2367 /* End of kludge for patching Solaris textlow and texthigh. */
2368 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2370 pst
->n_global_syms
=
2371 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2372 pst
->n_static_syms
=
2373 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2375 pst
->number_of_dependencies
= number_dependencies
;
2376 if (number_dependencies
)
2378 pst
->dependencies
= (struct partial_symtab
**)
2379 obstack_alloc (&objfile
->psymbol_obstack
,
2380 number_dependencies
* sizeof (struct partial_symtab
*));
2381 memcpy (pst
->dependencies
, dependency_list
,
2382 number_dependencies
* sizeof (struct partial_symtab
*));
2385 pst
->dependencies
= 0;
2387 for (i
= 0; i
< num_includes
; i
++)
2389 struct partial_symtab
*subpst
=
2390 allocate_psymtab (include_list
[i
], objfile
);
2392 /* Copy the sesction_offsets array from the main psymtab. */
2393 subpst
->section_offsets
= pst
->section_offsets
;
2394 subpst
->read_symtab_private
=
2395 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2396 sizeof (struct symloc
));
2400 subpst
->texthigh
= 0;
2402 /* We could save slight bits of space by only making one of these,
2403 shared by the entire set of include files. FIXME-someday. */
2404 subpst
->dependencies
= (struct partial_symtab
**)
2405 obstack_alloc (&objfile
->psymbol_obstack
,
2406 sizeof (struct partial_symtab
*));
2407 subpst
->dependencies
[0] = pst
;
2408 subpst
->number_of_dependencies
= 1;
2410 subpst
->globals_offset
=
2411 subpst
->n_global_syms
=
2412 subpst
->statics_offset
=
2413 subpst
->n_static_syms
= 0;
2417 subpst
->read_symtab
= pst
->read_symtab
;
2420 sort_pst_symbols (pst
);
2422 /* If there is already a psymtab or symtab for a file of this name, remove it.
2423 (If there is a symtab, more drastic things also happen.)
2424 This happens in VxWorks. */
2425 free_named_symtabs (pst
->filename
);
2427 if (num_includes
== 0
2428 && number_dependencies
== 0
2429 && pst
->n_global_syms
== 0
2430 && pst
->n_static_syms
== 0
2431 && has_line_numbers
== 0)
2433 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2434 it is on the obstack, but we can forget to chain it on the list. */
2435 /* Empty psymtabs happen as a result of header files which don't have
2436 any symbols in them. There can be a lot of them. But this check
2437 is wrong, in that a psymtab with N_SLINE entries but nothing else
2438 is not empty, but we don't realize that. Fixing that without slowing
2439 things down might be tricky. */
2441 discard_psymtab (pst
);
2443 /* Indicate that psymtab was thrown away. */
2444 pst
= (struct partial_symtab
*) NULL
;
2450 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2452 struct cleanup
*old_chain
;
2460 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2465 /* Read in all partial symtabs on which this one is dependent */
2466 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2467 if (!pst
->dependencies
[i
]->readin
)
2469 /* Inform about additional files that need to be read in. */
2472 fputs_filtered (" ", gdb_stdout
);
2474 fputs_filtered ("and ", gdb_stdout
);
2476 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2477 wrap_here (""); /* Flush output */
2478 gdb_flush (gdb_stdout
);
2480 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2483 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2485 /* Init stuff necessary for reading in symbols */
2488 old_chain
= make_cleanup (really_free_pendings
, 0);
2489 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2490 symbol_size
= SYMBOL_SIZE (pst
);
2492 /* Read in this file's symbols */
2493 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2494 read_ofile_symtab (pst
);
2496 do_cleanups (old_chain
);
2502 /* Read in all of the symbols for a given psymtab for real.
2503 Be verbose about it if the user wants that. */
2506 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2509 struct cleanup
*back_to
= NULL
;
2516 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2521 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2523 /* Print the message now, before reading the string table,
2524 to avoid disconcerting pauses. */
2527 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2528 gdb_flush (gdb_stdout
);
2531 sym_bfd
= pst
->objfile
->obfd
;
2533 next_symbol_text_func
= dbx_next_symbol_text
;
2535 if (DBX_STAB_SECTION (pst
->objfile
))
2538 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2539 DBX_STAB_SECTION (pst
->objfile
),
2542 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
2545 dbx_psymtab_to_symtab_1 (pst
);
2548 do_cleanups (back_to
);
2550 /* Match with global symbols. This only needs to be done once,
2551 after all of the symtabs and dependencies have been read in. */
2552 scan_file_globals (pst
->objfile
);
2554 /* Finish up the debug error message. */
2556 printf_filtered ("done.\n");
2560 /* Read in a defined section of a specific object file's symbols. */
2563 read_ofile_symtab (struct partial_symtab
*pst
)
2565 register char *namestring
;
2566 register struct external_nlist
*bufp
;
2567 struct internal_nlist nlist
;
2569 unsigned max_symnum
;
2571 struct objfile
*objfile
;
2572 int sym_offset
; /* Offset to start of symbols to read */
2573 int sym_size
; /* Size of symbols to read */
2574 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2575 int text_size
; /* Size of text segment for symbols */
2576 struct section_offsets
*section_offsets
;
2578 objfile
= pst
->objfile
;
2579 sym_offset
= LDSYMOFF (pst
);
2580 sym_size
= LDSYMLEN (pst
);
2581 text_offset
= pst
->textlow
;
2582 text_size
= pst
->texthigh
- pst
->textlow
;
2583 /* This cannot be simply objfile->section_offsets because of
2584 elfstab_offset_sections() which initializes the psymtab section
2585 offsets information in a special way, and that is different from
2586 objfile->section_offsets. */
2587 section_offsets
= pst
->section_offsets
;
2589 current_objfile
= objfile
;
2590 subfile_stack
= NULL
;
2592 stringtab_global
= DBX_STRINGTAB (objfile
);
2593 last_source_file
= NULL
;
2595 abfd
= objfile
->obfd
;
2596 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2597 symbuf_end
= symbuf_idx
= 0;
2599 symbuf_left
= sym_offset
+ sym_size
;
2601 /* It is necessary to actually read one symbol *before* the start
2602 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2603 occurs before the N_SO symbol.
2605 Detecting this in read_dbx_symtab
2606 would slow down initial readin, so we look for it here instead. */
2607 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2609 stabs_seek (sym_offset
- symbol_size
);
2611 bufp
= &symbuf
[symbuf_idx
++];
2612 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2613 OBJSTAT (objfile
, n_stabs
++);
2615 namestring
= set_namestring (objfile
, nlist
);
2617 processing_gcc_compilation
= 0;
2618 if (nlist
.n_type
== N_TEXT
)
2620 const char *tempstring
= namestring
;
2622 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2623 processing_gcc_compilation
= 1;
2624 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2625 processing_gcc_compilation
= 2;
2626 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2628 if (STREQN (tempstring
, "__gnu_compiled", 14))
2629 processing_gcc_compilation
= 2;
2632 /* Try to select a C++ demangling based on the compilation unit
2636 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2637 know whether it will use the old style or v3 mangling. */
2638 if (processing_gcc_compilation
)
2640 if (AUTO_DEMANGLING
)
2642 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2649 /* The N_SO starting this symtab is the first symbol, so we
2650 better not check the symbol before it. I'm not this can
2651 happen, but it doesn't hurt to check for it. */
2652 stabs_seek (sym_offset
);
2653 processing_gcc_compilation
= 0;
2656 if (symbuf_idx
== symbuf_end
)
2658 bufp
= &symbuf
[symbuf_idx
];
2659 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2660 error ("First symbol in segment of executable not a source symbol");
2662 max_symnum
= sym_size
/ symbol_size
;
2665 symnum
< max_symnum
;
2668 QUIT
; /* Allow this to be interruptable */
2669 if (symbuf_idx
== symbuf_end
)
2671 bufp
= &symbuf
[symbuf_idx
++];
2672 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2673 OBJSTAT (objfile
, n_stabs
++);
2675 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2677 namestring
= set_namestring (objfile
, nlist
);
2681 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2682 namestring
, section_offsets
, objfile
);
2684 /* We skip checking for a new .o or -l file; that should never
2685 happen in this routine. */
2686 else if (type
== N_TEXT
)
2688 /* I don't think this code will ever be executed, because
2689 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2690 the N_SO symbol which starts this source file.
2691 However, there is no reason not to accept
2692 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2694 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2695 processing_gcc_compilation
= 1;
2696 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2697 processing_gcc_compilation
= 2;
2700 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2701 know whether it will use the old style or v3 mangling. */
2702 if (AUTO_DEMANGLING
)
2704 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2708 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2709 || type
== (unsigned char) N_NBTEXT
2712 /* Global symbol: see if we came across a dbx defintion for
2713 a corresponding symbol. If so, store the value. Remove
2714 syms from the chain when their values are stored, but
2715 search the whole chain, as there may be several syms from
2716 different files with the same name. */
2717 /* This is probably not true. Since the files will be read
2718 in one at a time, each reference to a global symbol will
2719 be satisfied in each file as it appears. So we skip this
2725 current_objfile
= NULL
;
2727 /* In a Solaris elf file, this variable, which comes from the
2728 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2729 which comes from pst->textlow is correct. */
2730 if (last_source_start_addr
== 0)
2731 last_source_start_addr
= text_offset
;
2733 /* In reordered executables last_source_start_addr may not be the
2734 lower bound for this symtab, instead use text_offset which comes
2735 from pst->textlow which is correct. */
2736 if (last_source_start_addr
> text_offset
)
2737 last_source_start_addr
= text_offset
;
2739 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
2741 #if 0 /* OBSOLETE CFront */
2742 // OBSOLETE /* Process items which we had to "process_later" due to dependencies
2743 // OBSOLETE on other stabs. */
2744 // OBSOLETE process_now (objfile);
2745 #endif /* OBSOLETE CFront */
2750 /* This handles a single symbol from the symbol-file, building symbols
2751 into a GDB symtab. It takes these arguments and an implicit argument.
2753 TYPE is the type field of the ".stab" symbol entry.
2754 DESC is the desc field of the ".stab" entry.
2755 VALU is the value field of the ".stab" entry.
2756 NAME is the symbol name, in our address space.
2757 SECTION_OFFSETS is a set of amounts by which the sections of this object
2758 file were relocated when it was loaded into memory.
2759 Note that these section_offsets are not the
2760 objfile->section_offsets but the pst->section_offsets.
2761 All symbols that refer
2762 to memory locations need to be offset by these amounts.
2763 OBJFILE is the object file from which we are reading symbols.
2764 It is used in end_symtab. */
2767 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2768 struct section_offsets
*section_offsets
,
2769 struct objfile
*objfile
)
2771 #ifdef SUN_FIXED_LBRAC_BUG
2772 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2773 to correct the address of N_LBRAC's. If it is not defined, then
2774 we never need to correct the addresses. */
2776 /* This records the last pc address we've seen. We depend on there being
2777 an SLINE or FUN or SO before the first LBRAC, since the variable does
2778 not get reset in between reads of different symbol files. */
2779 static CORE_ADDR last_pc_address
;
2782 register struct context_stack
*new;
2783 /* This remembers the address of the start of a function. It is used
2784 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2785 relative to the current function's start address. On systems
2786 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2787 used to relocate these symbol types rather than SECTION_OFFSETS. */
2788 static CORE_ADDR function_start_offset
;
2790 /* This holds the address of the start of a function, without the system
2791 peculiarities of function_start_offset. */
2792 static CORE_ADDR last_function_start
;
2794 /* If this is nonzero, we've seen an N_SLINE since the start of the
2795 current function. We use this to tell us to move the first sline
2796 to the beginning of the function regardless of what its given
2798 static int sline_found_in_function
= 1;
2800 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2801 file. Used to detect the SunPRO solaris compiler. */
2802 static int n_opt_found
;
2804 /* The stab type used for the definition of the last function.
2805 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2806 static int function_stab_type
= 0;
2808 if (!block_address_function_relative
)
2809 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2810 function start address, so just use the text offset. */
2811 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2813 /* Something is wrong if we see real data before
2814 seeing a source file name. */
2816 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2818 /* Ignore any symbols which appear before an N_SO symbol.
2819 Currently no one puts symbols there, but we should deal
2820 gracefully with the case. A complain()t might be in order,
2821 but this should not be an error (). */
2830 if (*name
== '\000')
2832 /* This N_FUN marks the end of a function. This closes off the
2835 if (context_stack_depth
<= 0)
2837 lbrac_mismatch_complaint (symnum
);
2841 /* The following check is added before recording line 0 at
2842 end of function so as to handle hand-generated stabs
2843 which may have an N_FUN stabs at the end of the function, but
2844 no N_SLINE stabs. */
2845 if (sline_found_in_function
)
2846 record_line (current_subfile
, 0, last_function_start
+ valu
);
2848 within_function
= 0;
2849 new = pop_context ();
2851 /* Make a block for the local symbols within. */
2852 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2853 new->start_addr
, new->start_addr
+ valu
,
2856 /* May be switching to an assembler file which may not be using
2857 block relative stabs, so reset the offset. */
2858 if (block_address_function_relative
)
2859 function_start_offset
= 0;
2864 sline_found_in_function
= 0;
2866 /* Relocate for dynamic loading */
2867 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2868 valu
= SMASH_TEXT_ADDRESS (valu
);
2869 last_function_start
= valu
;
2871 goto define_a_symbol
;
2874 /* This "symbol" just indicates the start of an inner lexical
2875 context within a function. */
2877 /* Ignore extra outermost context from SunPRO cc and acc. */
2878 if (n_opt_found
&& desc
== 1)
2881 if (block_address_function_relative
)
2882 /* Relocate for Sun ELF acc fn-relative syms. */
2883 valu
+= function_start_offset
;
2885 /* On most machines, the block addresses are relative to the
2886 N_SO, the linker did not relocate them (sigh). */
2887 valu
+= last_source_start_addr
;
2889 #ifdef SUN_FIXED_LBRAC_BUG
2890 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
2892 /* Patch current LBRAC pc value to match last handy pc value */
2893 complaint (&symfile_complaints
, "bad block start address patched");
2894 valu
= last_pc_address
;
2897 new = push_context (desc
, valu
);
2901 /* This "symbol" just indicates the end of an inner lexical
2902 context that was started with N_LBRAC. */
2904 /* Ignore extra outermost context from SunPRO cc and acc. */
2905 if (n_opt_found
&& desc
== 1)
2908 if (block_address_function_relative
)
2909 /* Relocate for Sun ELF acc fn-relative syms. */
2910 valu
+= function_start_offset
;
2912 /* On most machines, the block addresses are relative to the
2913 N_SO, the linker did not relocate them (sigh). */
2914 valu
+= last_source_start_addr
;
2916 if (context_stack_depth
<= 0)
2918 lbrac_mismatch_complaint (symnum
);
2922 new = pop_context ();
2923 if (desc
!= new->depth
)
2924 lbrac_mismatch_complaint (symnum
);
2926 /* Some compilers put the variable decls inside of an
2927 LBRAC/RBRAC block. This macro should be nonzero if this
2928 is true. DESC is N_DESC from the N_RBRAC symbol.
2929 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2930 or the GCC2_COMPILED_SYMBOL. */
2931 #if !defined (VARIABLES_INSIDE_BLOCK)
2932 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2935 /* Can only use new->locals as local symbols here if we're in
2936 gcc or on a machine that puts them before the lbrack. */
2937 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2939 if (local_symbols
!= NULL
)
2941 /* GCC development snapshots from March to December of
2942 2000 would output N_LSYM entries after N_LBRAC
2943 entries. As a consequence, these symbols are simply
2944 discarded. Complain if this is the case. Note that
2945 there are some compilers which legitimately put local
2946 symbols within an LBRAC/RBRAC block; this complaint
2947 might also help sort out problems in which
2948 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2949 complaint (&symfile_complaints
,
2950 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2952 local_symbols
= new->locals
;
2955 if (context_stack_depth
2956 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2958 /* This is not the outermost LBRAC...RBRAC pair in the function,
2959 its local symbols preceded it, and are the ones just recovered
2960 from the context stack. Define the block for them (but don't
2961 bother if the block contains no symbols. Should we complain
2962 on blocks without symbols? I can't think of any useful purpose
2964 if (local_symbols
!= NULL
)
2966 /* Muzzle a compiler bug that makes end < start. (which
2967 compilers? Is this ever harmful?). */
2968 if (new->start_addr
> valu
)
2970 complaint (&symfile_complaints
,
2971 "block start larger than block end");
2972 new->start_addr
= valu
;
2974 /* Make a block for the local symbols within. */
2975 finish_block (0, &local_symbols
, new->old_blocks
,
2976 new->start_addr
, valu
, objfile
);
2981 /* This is the outermost LBRAC...RBRAC pair. There is no
2982 need to do anything; leave the symbols that preceded it
2983 to be attached to the function's own block. We need to
2984 indicate that we just moved outside of the function. */
2985 within_function
= 0;
2988 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2989 /* Now pop locals of block just finished. */
2990 local_symbols
= new->locals
;
2995 /* This kind of symbol indicates the start of an object file. */
2996 /* Relocate for dynamic loading */
2997 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3001 /* This type of symbol indicates the start of data
3002 for one source file.
3003 Finish the symbol table of the previous source file
3004 (if any) and start accumulating a new symbol table. */
3005 /* Relocate for dynamic loading */
3006 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3010 #ifdef SUN_FIXED_LBRAC_BUG
3011 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3014 #ifdef PCC_SOL_BROKEN
3015 /* pcc bug, occasionally puts out SO for SOL. */
3016 if (context_stack_depth
> 0)
3018 start_subfile (name
, NULL
);
3022 if (last_source_file
)
3024 /* Check if previous symbol was also an N_SO (with some
3025 sanity checks). If so, that one was actually the directory
3026 name, and the current one is the real file name.
3028 if (previous_stab_code
== (unsigned char) N_SO
)
3030 patch_subfile_names (current_subfile
, name
);
3031 break; /* Ignore repeated SOs */
3033 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
3037 /* Null name means this just marks the end of text for this .o file.
3038 Don't start a new symtab in this case. */
3039 if (*name
== '\000')
3042 if (block_address_function_relative
)
3043 function_start_offset
= 0;
3046 start_symtab (name
, NULL
, valu
);
3047 record_debugformat ("stabs");
3051 /* This type of symbol indicates the start of data for
3052 a sub-source-file, one whose contents were copied or
3053 included in the compilation of the main source file
3054 (whose name was given in the N_SO symbol.) */
3055 /* Relocate for dynamic loading */
3056 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3057 start_subfile (name
, current_subfile
->dirname
);
3062 add_new_header_file (name
, valu
);
3063 start_subfile (name
, current_subfile
->dirname
);
3067 start_subfile (pop_subfile (), current_subfile
->dirname
);
3071 add_old_header_file (name
, valu
);
3075 /* This type of "symbol" really just records
3076 one line-number -- core-address correspondence.
3077 Enter it in the line list for this symbol table. */
3079 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
3080 valu
+= function_start_offset
;
3082 #ifdef SUN_FIXED_LBRAC_BUG
3083 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3085 /* If this is the first SLINE note in the function, record it at
3086 the start of the function instead of at the listed location. */
3087 if (within_function
&& sline_found_in_function
== 0)
3089 record_line (current_subfile
, desc
, last_function_start
);
3090 sline_found_in_function
= 1;
3093 record_line (current_subfile
, desc
, valu
);
3097 common_block_start (name
, objfile
);
3101 common_block_end (objfile
);
3104 /* The following symbol types need to have the appropriate offset added
3105 to their value; then we process symbol definitions in the name. */
3107 case N_STSYM
: /* Static symbol in data seg */
3108 case N_LCSYM
: /* Static symbol in BSS seg */
3109 case N_ROSYM
: /* Static symbol in Read-only data seg */
3110 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3111 Solaris2's stabs-in-elf makes *most* symbols relative
3112 but leaves a few absolute (at least for Solaris 2.1 and version
3113 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3114 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3115 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3116 This leaves us no choice but to search for the 'S' or 'V'...
3117 (or pass the whole section_offsets stuff down ONE MORE function
3118 call level, which we really don't want to do). */
3122 /* .o files and NLMs have non-zero text seg offsets, but don't need
3123 their static syms offset in this fashion. XXX - This is really a
3124 crock that should be fixed in the solib handling code so that I
3125 don't have to work around it here. */
3127 if (!symfile_relocatable
)
3129 p
= strchr (name
, ':');
3130 if (p
!= 0 && p
[1] == 'S')
3132 /* The linker relocated it. We don't want to add an
3133 elfstab_offset_sections-type offset, but we *do* want
3134 to add whatever solib.c passed to symbol_file_add as
3135 addr (this is known to affect SunOS4, and I suspect ELF
3136 too). Since elfstab_offset_sections currently does not
3137 muck with the text offset (there is no Ttext.text
3138 symbol), we can get addr from the text offset. If
3139 elfstab_offset_sections ever starts dealing with the
3140 text offset, and we still need to do this, we need to
3141 invent a SECT_OFF_ADDR_KLUDGE or something. */
3142 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3143 goto define_a_symbol
;
3146 /* Since it's not the kludge case, re-dispatch to the right handler. */
3156 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
3160 case_N_STSYM
: /* Static symbol in data seg */
3161 case N_DSLINE
: /* Source line number, data seg */
3162 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3163 goto define_a_symbol
;
3165 case_N_LCSYM
: /* Static symbol in BSS seg */
3166 case N_BSLINE
: /* Source line number, bss seg */
3167 /* N_BROWS: overlaps with N_BSLINE */
3168 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3169 goto define_a_symbol
;
3171 case_N_ROSYM
: /* Static symbol in Read-only data seg */
3172 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3173 goto define_a_symbol
;
3175 case N_ENTRY
: /* Alternate entry point */
3176 /* Relocate for dynamic loading */
3177 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3178 goto define_a_symbol
;
3180 /* The following symbol types we don't know how to process. Handle
3181 them in a "default" way, but complain to people who care. */
3183 case N_CATCH
: /* Exception handler catcher */
3184 case N_EHDECL
: /* Exception handler name */
3185 case N_PC
: /* Global symbol in Pascal */
3186 case N_M2C
: /* Modula-2 compilation unit */
3187 /* N_MOD2: overlaps with N_EHDECL */
3188 case N_SCOPE
: /* Modula-2 scope information */
3189 case N_ECOML
: /* End common (local name) */
3190 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3195 unknown_symtype_complaint (local_hex_string (type
));
3198 /* The following symbol types don't need the address field relocated,
3199 since it is either unused, or is absolute. */
3201 case N_GSYM
: /* Global variable */
3202 case N_NSYMS
: /* Number of symbols (ultrix) */
3203 case N_NOMAP
: /* No map? (ultrix) */
3204 case N_RSYM
: /* Register variable */
3205 case N_DEFD
: /* Modula-2 GNU module dependency */
3206 case N_SSYM
: /* Struct or union element */
3207 case N_LSYM
: /* Local symbol in stack */
3208 case N_PSYM
: /* Parameter variable */
3209 case N_LENG
: /* Length of preceding symbol type */
3213 char *colon_pos
= strchr (name
, ':');
3214 if (colon_pos
== NULL
)
3217 deftype
= colon_pos
[1];
3223 function_stab_type
= type
;
3225 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3226 /* Deal with the SunPRO 3.0 compiler which omits the address
3227 from N_FUN symbols. */
3229 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
3231 CORE_ADDR minsym_valu
=
3232 find_stab_function_addr (name
, last_source_file
, objfile
);
3234 /* find_stab_function_addr will return 0 if the minimal
3235 symbol wasn't found. (Unfortunately, this might also
3236 be a valid address.) Anyway, if it *does* return 0,
3237 it is likely that the value was set correctly to begin
3239 if (minsym_valu
!= 0)
3244 #ifdef SUN_FIXED_LBRAC_BUG
3245 /* The Sun acc compiler, under SunOS4, puts out
3246 functions with N_GSYM or N_STSYM. The problem is
3247 that the address of the symbol is no good (for N_GSYM
3248 it doesn't even attept an address; for N_STSYM it
3249 puts out an address but then it gets relocated
3250 relative to the data segment, not the text segment).
3251 Currently we can't fix this up later as we do for
3252 some types of symbol in scan_file_globals.
3253 Fortunately we do have a way of finding the address -
3254 we know that the value in last_pc_address is either
3255 the one we want (if we're dealing with the first
3256 function in an object file), or somewhere in the
3257 previous function. This means that we can use the
3258 minimal symbol table to get the address. */
3260 /* Starting with release 3.0, the Sun acc compiler,
3261 under SunOS4, puts out functions with N_FUN and a value
3262 of zero. This gets relocated to the start of the text
3263 segment of the module, which is no good either.
3264 Under SunOS4 we can deal with this as N_SLINE and N_SO
3265 entries contain valid absolute addresses.
3266 Release 3.0 acc also puts out N_OPT entries, which makes
3267 it possible to discern acc from cc or gcc. */
3269 if (type
== N_GSYM
|| type
== N_STSYM
3271 && n_opt_found
&& !block_address_function_relative
))
3273 struct minimal_symbol
*m
;
3274 int l
= colon_pos
- name
;
3276 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
3277 if (m
&& STREQN (DEPRECATED_SYMBOL_NAME (m
), name
, l
)
3278 && DEPRECATED_SYMBOL_NAME (m
)[l
] == '\0')
3279 /* last_pc_address was in this function */
3280 valu
= SYMBOL_VALUE (m
);
3281 else if (m
&& DEPRECATED_SYMBOL_NAME (m
+ 1)
3282 && STREQN (DEPRECATED_SYMBOL_NAME (m
+ 1), name
, l
)
3283 && DEPRECATED_SYMBOL_NAME (m
+ 1)[l
] == '\0')
3284 /* last_pc_address was in last function */
3285 valu
= SYMBOL_VALUE (m
+ 1);
3287 /* Not found - use last_pc_address (for finish_block) */
3288 valu
= last_pc_address
;
3291 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3294 if (block_address_function_relative
)
3295 /* For Solaris 2.0 compilers, the block addresses and
3296 N_SLINE's are relative to the start of the
3297 function. On normal systems, and when using gcc on
3298 Solaris 2.0, these addresses are just absolute, or
3299 relative to the N_SO, depending on
3300 BLOCK_ADDRESS_ABSOLUTE. */
3301 function_start_offset
= valu
;
3303 within_function
= 1;
3305 if (context_stack_depth
> 1)
3307 complaint (&symfile_complaints
,
3308 "unmatched N_LBRAC before symtab pos %d", symnum
);
3312 if (context_stack_depth
> 0)
3314 new = pop_context ();
3315 /* Make a block for the local symbols within. */
3316 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3317 new->start_addr
, valu
, objfile
);
3320 new = push_context (0, valu
);
3321 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3325 define_symbol (valu
, name
, desc
, type
, objfile
);
3331 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3332 for a bunch of other flags, too. Someday we may parse their
3333 flags; for now we ignore theirs and hope they'll ignore ours. */
3334 case N_OPT
: /* Solaris 2: Compiler options */
3337 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
3339 processing_gcc_compilation
= 2;
3340 #if 0 /* Works, but is experimental. -fnf */
3341 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3342 know whether it will use the old style or v3 mangling. */
3343 if (AUTO_DEMANGLING
)
3345 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3354 case N_MAIN
: /* Name of main routine. */
3355 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3356 it with a symbol file with "main" and without N_MAIN. I'm
3357 not sure exactly what rule to follow but probably something
3358 like: N_MAIN takes precedence over "main" no matter what
3359 objfile it is in; If there is more than one N_MAIN, choose
3360 the one in the symfile_objfile; If there is more than one
3361 N_MAIN within a given objfile, complain() and choose
3362 arbitrarily. (kingdon) */
3364 set_main_name (name
);
3367 /* The following symbol types can be ignored. */
3368 case N_OBJ
: /* Solaris 2: Object file dir and name */
3369 /* N_UNDF: Solaris 2: file separator mark */
3370 /* N_UNDF: -- we will never encounter it, since we only process one
3371 file's symbols at once. */
3372 case N_ENDM
: /* Solaris 2: End of module */
3373 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3377 /* '#' is a GNU C extension to allow one symbol to refer to another
3380 Generally this is used so that an alias can refer to its main
3384 /* Initialize symbol reference names and determine if this is
3385 a definition. If symbol reference is being defined, go
3386 ahead and add it. Otherwise, just return sym. */
3391 /* If this stab defines a new reference ID that is not on the
3392 reference list, then put it on the reference list.
3394 We go ahead and advance NAME past the reference, even though
3395 it is not strictly necessary at this time. */
3396 refnum
= symbol_reference_defined (&s
);
3398 if (!ref_search (refnum
))
3399 ref_add (refnum
, 0, name
, valu
);
3404 previous_stab_code
= type
;
3407 /* FIXME: The only difference between this and elfstab_build_psymtabs
3408 is the call to install_minimal_symbols for elf, and the support for
3409 split sections. If the differences are really that small, the code
3410 should be shared. */
3412 /* Scan and build partial symbols for an coff symbol file.
3413 The coff file has already been processed to get its minimal symbols.
3415 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3418 OBJFILE is the object file we are reading symbols from.
3419 ADDR is the address relative to which the symbols are (e.g.
3420 the base address of the text segment).
3421 MAINLINE is true if we are reading the main symbol
3422 table (as opposed to a shared lib or dynamically loaded file).
3423 TEXTADDR is the address of the text section.
3424 TEXTSIZE is the size of the text section.
3425 STABSECTS is the list of .stab sections in OBJFILE.
3426 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3427 .stabstr section exists.
3429 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3430 adjusted for coff details. */
3433 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3434 CORE_ADDR textaddr
, unsigned int textsize
,
3435 struct stab_section_list
*stabsects
,
3436 file_ptr stabstroffset
, unsigned int stabstrsize
)
3439 bfd
*sym_bfd
= objfile
->obfd
;
3440 char *name
= bfd_get_filename (sym_bfd
);
3441 struct dbx_symfile_info
*info
;
3442 unsigned int stabsize
;
3444 /* There is already a dbx_symfile_info allocated by our caller.
3445 It might even contain some info from the coff symtab to help us. */
3446 info
= objfile
->sym_stab_info
;
3448 DBX_TEXT_ADDR (objfile
) = textaddr
;
3449 DBX_TEXT_SIZE (objfile
) = textsize
;
3451 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3452 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3453 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3455 if (stabstrsize
> bfd_get_size (sym_bfd
))
3456 error ("ridiculous string table size: %d bytes", stabstrsize
);
3457 DBX_STRINGTAB (objfile
) = (char *)
3458 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3459 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3461 /* Now read in the string table in one big gulp. */
3463 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3465 perror_with_name (name
);
3466 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3467 if (val
!= stabstrsize
)
3468 perror_with_name (name
);
3470 stabsread_new_init ();
3471 buildsym_new_init ();
3472 free_header_files ();
3473 init_header_files ();
3475 processing_acc_compilation
= 1;
3477 /* In a coff file, we've already installed the minimal symbols that came
3478 from the coff (non-stab) symbol table, so always act like an
3479 incremental load here. */
3480 if (stabsects
->next
== NULL
)
3482 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3483 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3484 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3488 struct stab_section_list
*stabsect
;
3490 DBX_SYMCOUNT (objfile
) = 0;
3491 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3493 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3494 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3497 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3499 symbuf_sections
= stabsects
->next
;
3500 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3504 dbx_symfile_read (objfile
, 0);
3507 /* Scan and build partial symbols for an ELF symbol file.
3508 This ELF file has already been processed to get its minimal symbols,
3509 and any DWARF symbols that were in it.
3511 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3514 OBJFILE is the object file we are reading symbols from.
3515 ADDR is the address relative to which the symbols are (e.g.
3516 the base address of the text segment).
3517 MAINLINE is true if we are reading the main symbol
3518 table (as opposed to a shared lib or dynamically loaded file).
3519 STABSECT is the BFD section information for the .stab section.
3520 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3521 .stabstr section exists.
3523 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3524 adjusted for elf details. */
3527 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3529 file_ptr stabstroffset
, unsigned int stabstrsize
)
3532 bfd
*sym_bfd
= objfile
->obfd
;
3533 char *name
= bfd_get_filename (sym_bfd
);
3534 struct dbx_symfile_info
*info
;
3535 struct cleanup
*back_to
= NULL
;
3537 /* There is already a dbx_symfile_info allocated by our caller.
3538 It might even contain some info from the ELF symtab to help us. */
3539 info
= objfile
->sym_stab_info
;
3541 /* Find the first and last text address. dbx_symfile_read seems to
3543 find_text_range (sym_bfd
, objfile
);
3545 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3546 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3547 DBX_SYMCOUNT (objfile
)
3548 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3549 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3550 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3551 DBX_STAB_SECTION (objfile
) = stabsect
;
3553 if (stabstrsize
> bfd_get_size (sym_bfd
))
3554 error ("ridiculous string table size: %d bytes", stabstrsize
);
3555 DBX_STRINGTAB (objfile
) = (char *)
3556 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3557 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3559 /* Now read in the string table in one big gulp. */
3561 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3563 perror_with_name (name
);
3564 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3565 if (val
!= stabstrsize
)
3566 perror_with_name (name
);
3568 stabsread_new_init ();
3569 buildsym_new_init ();
3570 free_header_files ();
3571 init_header_files ();
3573 processing_acc_compilation
= 1;
3576 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3577 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3579 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3581 /* In an elf file, we've already installed the minimal symbols that came
3582 from the elf (non-stab) symbol table, so always act like an
3583 incremental load here. dbx_symfile_read should not generate any new
3584 minimal symbols, since we will have already read the ELF dynamic symbol
3585 table and normal symbol entries won't be in the ".stab" section; but in
3586 case it does, it will install them itself. */
3587 dbx_symfile_read (objfile
, 0);
3590 do_cleanups (back_to
);
3593 /* Scan and build partial symbols for a file with special sections for stabs
3594 and stabstrings. The file has already been processed to get its minimal
3595 symbols, and any other symbols that might be necessary to resolve GSYMs.
3597 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3600 OBJFILE is the object file we are reading symbols from.
3601 ADDR is the address relative to which the symbols are (e.g. the base address
3602 of the text segment).
3603 MAINLINE is true if we are reading the main symbol table (as opposed to a
3604 shared lib or dynamically loaded file).
3605 STAB_NAME is the name of the section that contains the stabs.
3606 STABSTR_NAME is the name of the section that contains the stab strings.
3608 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3611 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3612 char *stabstr_name
, char *text_name
)
3615 bfd
*sym_bfd
= objfile
->obfd
;
3616 char *name
= bfd_get_filename (sym_bfd
);
3618 asection
*stabstrsect
;
3619 asection
*text_sect
;
3621 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3622 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3628 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3629 stab_name
, stabstr_name
);
3631 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
3632 xmalloc (sizeof (struct dbx_symfile_info
));
3633 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
3635 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3637 error ("Can't find %s section in symbol file", text_name
);
3638 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3639 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3641 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3642 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3643 / DBX_SYMBOL_SIZE (objfile
);
3644 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3645 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3647 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3648 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
3649 DBX_STRINGTAB (objfile
) = (char *)
3650 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3651 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3653 /* Now read in the string table in one big gulp. */
3655 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3656 stabstrsect
, /* bfd section */
3657 DBX_STRINGTAB (objfile
), /* input buffer */
3658 0, /* offset into section */
3659 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3662 perror_with_name (name
);
3664 stabsread_new_init ();
3665 buildsym_new_init ();
3666 free_header_files ();
3667 init_header_files ();
3669 /* Now, do an incremental load */
3671 processing_acc_compilation
= 1;
3672 dbx_symfile_read (objfile
, 0);
3675 static struct sym_fns aout_sym_fns
=
3677 bfd_target_aout_flavour
,
3678 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3679 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3680 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3681 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3682 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
3683 NULL
/* next: pointer to next struct sym_fns */
3687 _initialize_dbxread (void)
3689 add_symtab_fns (&aout_sym_fns
);