1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(USG) || defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
44 #include <sys/param.h>
51 #include "breakpoint.h"
54 #include "gdbcore.h" /* for bfd stuff */
55 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
59 #include "stabsread.h"
60 #include "gdb-stabs.h"
62 #include "language.h" /* Needed inside partial-stab.h */
63 #include "complaints.h"
65 #include "aout/aout64.h"
66 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
68 /* defined in stabsread.c; used for completing cfront stabs strings */
70 resolve_cfront_continuation
PARAMS((struct objfile
* objfile
,
71 struct symbol
* sym
, char * p
));
74 /* We put a pointer to this structure in the read_symtab_private field
79 /* Offset within the file symbol table of first local symbol for this
84 /* Length (in bytes) of the section of the symbol table devoted to
85 this file's symbols (actually, the section bracketed may contain
86 more than just this file's symbols). If ldsymlen is 0, the only
87 reason for this thing's existence is the dependency list. Nothing
88 else will happen when it is read in. */
92 /* The size of each symbol in the symbol file (in external form). */
96 /* Further information needed to locate the symbols if they are in
101 int file_string_offset
;
104 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
105 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
106 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
107 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
108 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
109 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
110 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
113 /* Macro to determine which symbols to ignore when reading the first symbol
114 of a file. Some machines override this definition. */
115 #ifndef IGNORE_SYMBOL
116 /* This code is used on Ultrix systems. Ignore it */
117 #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
120 /* Remember what we deduced to be the source language of this psymtab. */
122 static enum language psymtab_language
= language_unknown
;
124 /* Nonzero means give verbose info on gdb action. From main.c. */
125 extern int info_verbose
;
127 /* The BFD for this file -- implicit parameter to next_symbol_text. */
129 static bfd
*symfile_bfd
;
131 /* The size of each symbol in the symbol file (in external form).
132 This is set by dbx_symfile_read when building psymtabs, and by
133 dbx_psymtab_to_symtab when building symtabs. */
135 static unsigned symbol_size
;
137 /* This is the offset of the symbol table in the executable file */
138 static unsigned symbol_table_offset
;
140 /* This is the offset of the string table in the executable file */
141 static unsigned string_table_offset
;
143 /* For elf+stab executables, the n_strx field is not a simple index
144 into the string table. Instead, each .o file has a base offset
145 in the string table, and the associated symbols contain offsets
146 from this base. The following two variables contain the base
147 offset for the current and next .o files. */
148 static unsigned int file_string_table_offset
;
149 static unsigned int next_file_string_table_offset
;
151 /* .o and NLM files contain unrelocated addresses which are based at 0. When
152 non-zero, this flag disables some of the special cases for Solaris elf+stab
153 text addresses at location 0. */
155 static int symfile_relocatable
= 0;
157 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
158 to the function start address. */
160 static int block_address_function_relative
= 0;
162 /* The lowest text address we have yet encountered. This is needed
163 because in an a.out file, there is no header field which tells us
164 what address the program is actually going to be loaded at, so we
165 need to make guesses based on the symbols (which *are* relocated to
166 reflect the address it will be loaded at). */
167 static CORE_ADDR lowest_text_address
;
169 /* Complaints about the symbols we have encountered. */
171 struct complaint lbrac_complaint
=
172 {"bad block start address patched", 0, 0};
174 struct complaint string_table_offset_complaint
=
175 {"bad string table offset in symbol %d", 0, 0};
177 struct complaint unknown_symtype_complaint
=
178 {"unknown symbol type %s", 0, 0};
180 struct complaint unknown_symchar_complaint
=
181 {"unknown symbol descriptor `%c'", 0, 0};
183 struct complaint lbrac_rbrac_complaint
=
184 {"block start larger than block end", 0, 0};
186 struct complaint lbrac_unmatched_complaint
=
187 {"unmatched N_LBRAC before symtab pos %d", 0, 0};
189 struct complaint lbrac_mismatch_complaint
=
190 {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
192 struct complaint repeated_header_complaint
=
193 {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
195 /* During initial symbol readin, we need to have a structure to keep
196 track of which psymtabs have which bincls in them. This structure
197 is used during readin to setup the list of dependencies within each
198 partial symbol table. */
200 struct header_file_location
202 char *name
; /* Name of header file */
203 int instance
; /* See above */
204 struct partial_symtab
*pst
; /* Partial symtab that has the
205 BINCL/EINCL defs for this file */
208 /* The actual list and controling variables */
209 static struct header_file_location
*bincl_list
, *next_bincl
;
210 static int bincls_allocated
;
212 /* Local function prototypes */
215 free_header_files
PARAMS ((void));
218 init_header_files
PARAMS ((void));
221 read_ofile_symtab
PARAMS ((struct partial_symtab
*));
224 dbx_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
227 dbx_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
230 read_dbx_dynamic_symtab
PARAMS ((struct section_offsets
*,
231 struct objfile
*objfile
));
234 read_dbx_symtab
PARAMS ((struct section_offsets
*, struct objfile
*,
238 free_bincl_list
PARAMS ((struct objfile
*));
240 static struct partial_symtab
*
241 find_corresponding_bincl_psymtab
PARAMS ((char *, int));
244 add_bincl_to_list
PARAMS ((struct partial_symtab
*, char *, int));
247 init_bincl_list
PARAMS ((int, struct objfile
*));
250 dbx_next_symbol_text
PARAMS ((struct objfile
*));
253 fill_symbuf
PARAMS ((bfd
*));
256 dbx_symfile_init
PARAMS ((struct objfile
*));
259 dbx_new_init
PARAMS ((struct objfile
*));
262 dbx_symfile_read
PARAMS ((struct objfile
*, struct section_offsets
*, int));
265 dbx_symfile_finish
PARAMS ((struct objfile
*));
268 record_minimal_symbol
PARAMS ((char *, CORE_ADDR
, int, struct objfile
*));
271 add_new_header_file
PARAMS ((char *, int));
274 add_old_header_file
PARAMS ((char *, int));
277 add_this_object_header_file
PARAMS ((int));
279 /* Free up old header file tables */
286 if (header_files
!= NULL
)
288 for (i
= 0; i
< n_header_files
; i
++)
290 free (header_files
[i
].name
);
292 free ((PTR
)header_files
);
296 if (this_object_header_files
)
298 free ((PTR
)this_object_header_files
);
299 this_object_header_files
= NULL
;
301 n_allocated_header_files
= 0;
302 n_allocated_this_object_header_files
= 0;
305 /* Allocate new header file tables */
311 n_allocated_header_files
= 10;
312 header_files
= (struct header_file
*)
313 xmalloc (10 * sizeof (struct header_file
));
315 n_allocated_this_object_header_files
= 10;
316 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
319 /* Add header file number I for this object file
320 at the next successive FILENUM. */
323 add_this_object_header_file (i
)
326 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
328 n_allocated_this_object_header_files
*= 2;
329 this_object_header_files
330 = (int *) xrealloc ((char *) this_object_header_files
,
331 n_allocated_this_object_header_files
* sizeof (int));
334 this_object_header_files
[n_this_object_header_files
++] = i
;
337 /* Add to this file an "old" header file, one already seen in
338 a previous object file. NAME is the header file's name.
339 INSTANCE is its instance code, to select among multiple
340 symbol tables for the same header file. */
343 add_old_header_file (name
, instance
)
347 register struct header_file
*p
= header_files
;
350 for (i
= 0; i
< n_header_files
; i
++)
351 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
353 add_this_object_header_file (i
);
356 complain (&repeated_header_complaint
, name
, symnum
);
359 /* Add to this file a "new" header file: definitions for its types follow.
360 NAME is the header file's name.
361 Most often this happens only once for each distinct header file,
362 but not necessarily. If it happens more than once, INSTANCE has
363 a different value each time, and references to the header file
364 use INSTANCE values to select among them.
366 dbx output contains "begin" and "end" markers for each new header file,
367 but at this level we just need to know which files there have been;
368 so we record the file when its "begin" is seen and ignore the "end". */
371 add_new_header_file (name
, instance
)
377 /* Make sure there is room for one more header file. */
379 if (n_header_files
== n_allocated_header_files
)
381 n_allocated_header_files
*= 2;
382 header_files
= (struct header_file
*)
383 xrealloc ((char *) header_files
,
384 (n_allocated_header_files
* sizeof (struct header_file
)));
387 /* Create an entry for this header file. */
389 i
= n_header_files
++;
390 header_files
[i
].name
= savestring (name
, strlen(name
));
391 header_files
[i
].instance
= instance
;
392 header_files
[i
].length
= 10;
393 header_files
[i
].vector
394 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
395 memset (header_files
[i
].vector
, 0, 10 * sizeof (struct type
*));
397 add_this_object_header_file (i
);
401 static struct type
**
402 explicit_lookup_type (real_filenum
, index
)
403 int real_filenum
, index
;
405 register struct header_file
*f
= &header_files
[real_filenum
];
407 if (index
>= f
->length
)
410 f
->vector
= (struct type
**)
411 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
412 memset (&f
->vector
[f
->length
/ 2],
413 '\0', f
->length
* sizeof (struct type
*) / 2);
415 return &f
->vector
[index
];
420 record_minimal_symbol (name
, address
, type
, objfile
)
424 struct objfile
*objfile
;
426 enum minimal_symbol_type ms_type
;
433 section
= SECT_OFF_TEXT
;
437 section
= SECT_OFF_DATA
;
441 section
= SECT_OFF_BSS
;
450 section
= SECT_OFF_DATA
;
453 /* I don't think this type actually exists; since a N_SETV is the result
454 of going over many .o files, it doesn't make sense to have one
456 ms_type
= mst_file_data
;
457 section
= SECT_OFF_DATA
;
464 ms_type
= mst_file_text
;
465 section
= SECT_OFF_TEXT
;
468 ms_type
= mst_file_data
;
470 /* Check for __DYNAMIC, which is used by Sun shared libraries.
471 Record it as global even if it's local, not global, so
472 lookup_minimal_symbol can find it. We don't check symbol_leading_char
473 because for SunOS4 it always is '_'. */
474 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
477 /* Same with virtual function tables, both global and static. */
479 char *tempstring
= name
;
480 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
482 if (VTBL_PREFIX_P ((tempstring
)))
485 section
= SECT_OFF_DATA
;
488 ms_type
= mst_file_bss
;
489 section
= SECT_OFF_BSS
;
492 ms_type
= mst_unknown
;
497 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
498 && address
< lowest_text_address
)
499 lowest_text_address
= address
;
501 prim_record_minimal_symbol_and_info
502 (obsavestring (name
, strlen (name
), &objfile
-> symbol_obstack
),
510 /* Scan and build partial symbols for a symbol file.
511 We have been initialized by a call to dbx_symfile_init, which
512 put all the relevant info into a "struct dbx_symfile_info",
513 hung off the objfile structure.
515 SECTION_OFFSETS contains offsets relative to which the symbols in the
516 various sections are (depending where the sections were actually loaded).
517 MAINLINE is true if we are reading the main symbol
518 table (as opposed to a shared lib or dynamically loaded file). */
521 dbx_symfile_read (objfile
, section_offsets
, mainline
)
522 struct objfile
*objfile
;
523 struct section_offsets
*section_offsets
;
524 int mainline
; /* FIXME comments above */
528 struct cleanup
*back_to
;
530 val
= strlen (objfile
->name
);
532 /* .o and .nlm files are relocatables with text, data and bss segs based at
533 0. This flag disables special (Solaris stabs-in-elf only) fixups for
534 symbols with a value of 0. XXX - This is a Krock. Solaris stabs-in-elf
535 should be fixed to determine pst->textlow without using this text seg of
538 if (strcmp (&objfile
->name
[val
-2], ".o") == 0
539 || strcmp (&objfile
->name
[val
-4], ".nlm") == 0)
540 symfile_relocatable
= 1;
542 /* This is true for Solaris (and all other systems which put stabs
543 in sections, hopefully, since it would be silly to do things
544 differently from Solaris), and false for SunOS4 and other a.out
546 block_address_function_relative
=
547 ((0 == strncmp (bfd_get_target (objfile
->obfd
), "elf", 3))
548 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "som", 3))
549 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "coff", 4))
550 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "pe", 2))
551 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "nlm", 3)));
553 sym_bfd
= objfile
->obfd
;
554 val
= bfd_seek (objfile
->obfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
556 perror_with_name (objfile
->name
);
558 /* If we are reinitializing, or if we have never loaded syms yet, init */
560 || objfile
->global_psymbols
.size
== 0
561 || objfile
->static_psymbols
.size
== 0)
562 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
564 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
565 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
568 back_to
= make_cleanup (really_free_pendings
, 0);
570 init_minimal_symbol_collection ();
571 make_cleanup (discard_minimal_symbols
, 0);
573 /* Now that the symbol table data of the executable file are all in core,
574 process them and define symbols accordingly. */
576 read_dbx_symtab (section_offsets
, objfile
,
577 DBX_TEXT_ADDR (objfile
),
578 DBX_TEXT_SIZE (objfile
));
580 /* Add the dynamic symbols. */
582 read_dbx_dynamic_symtab (section_offsets
, objfile
);
584 /* Install any minimal symbols that have been collected as the current
585 minimal symbols for this objfile. */
587 install_minimal_symbols (objfile
);
589 do_cleanups (back_to
);
592 /* Initialize anything that needs initializing when a completely new
593 symbol file is specified (not just adding some symbols from another
594 file, e.g. a shared library). */
597 dbx_new_init (ignore
)
598 struct objfile
*ignore
;
600 stabsread_new_init ();
601 buildsym_new_init ();
602 init_header_files ();
606 /* dbx_symfile_init ()
607 is the dbx-specific initialization routine for reading symbols.
608 It is passed a struct objfile which contains, among other things,
609 the BFD for the file whose symbols are being read, and a slot for a pointer
610 to "private data" which we fill with goodies.
612 We read the string table into malloc'd space and stash a pointer to it.
614 Since BFD doesn't know how to read debug symbols in a format-independent
615 way (and may never do so...), we have to do it ourselves. We will never
616 be called unless this is an a.out (or very similar) file.
617 FIXME, there should be a cleaner peephole into the BFD environment here. */
619 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
622 dbx_symfile_init (objfile
)
623 struct objfile
*objfile
;
626 bfd
*sym_bfd
= objfile
->obfd
;
627 char *name
= bfd_get_filename (sym_bfd
);
629 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
631 /* Allocate struct to keep track of the symfile */
632 objfile
->sym_stab_info
= (PTR
)
633 xmmalloc (objfile
-> md
, sizeof (struct dbx_symfile_info
));
635 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
636 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
637 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
639 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
641 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
643 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
645 error ("Can't find .text section in symbol file");
646 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
647 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
649 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
650 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
651 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
653 /* Read the string table and stash it away in the psymbol_obstack. It is
654 only needed as long as we need to expand psymbols into full symbols,
655 so when we blow away the psymbol the string table goes away as well.
656 Note that gdb used to use the results of attempting to malloc the
657 string table, based on the size it read, as a form of sanity check
658 for botched byte swapping, on the theory that a byte swapped string
659 table size would be so totally bogus that the malloc would fail. Now
660 that we put in on the psymbol_obstack, we can't do this since gdb gets
661 a fatal error (out of virtual memory) if the size is bogus. We can
662 however at least check to see if the size is less than the size of
663 the size field itself, or larger than the size of the entire file.
664 Note that all valid string tables have a size greater than zero, since
665 the bytes used to hold the size are included in the count. */
667 if (STRING_TABLE_OFFSET
== 0)
669 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
670 will never be zero, even when there is no string table. This
671 would appear to be a bug in bfd. */
672 DBX_STRINGTAB_SIZE (objfile
) = 0;
673 DBX_STRINGTAB (objfile
) = NULL
;
677 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
679 perror_with_name (name
);
681 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
682 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
685 perror_with_name (name
);
689 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
690 EOF if there is no string table, and attempting to read the size
691 from EOF will read zero bytes. */
692 DBX_STRINGTAB_SIZE (objfile
) = 0;
693 DBX_STRINGTAB (objfile
) = NULL
;
697 /* Read some data that would appear to be the string table size.
698 If there really is a string table, then it is probably the right
699 size. Byteswap if necessary and validate the size. Note that
700 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
701 random data that happened to be at STRING_TABLE_OFFSET, because
702 bfd can't tell us there is no string table, the sanity checks may
703 or may not catch this. */
704 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
706 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
707 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
708 error ("ridiculous string table size (%d bytes).",
709 DBX_STRINGTAB_SIZE (objfile
));
711 DBX_STRINGTAB (objfile
) =
712 (char *) obstack_alloc (&objfile
-> psymbol_obstack
,
713 DBX_STRINGTAB_SIZE (objfile
));
714 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
716 /* Now read in the string table in one big gulp. */
718 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
720 perror_with_name (name
);
721 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
723 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
724 perror_with_name (name
);
729 /* Perform any local cleanups required when we are done with a particular
730 objfile. I.E, we are in the process of discarding all symbol information
731 for an objfile, freeing up all memory held for it, and unlinking the
732 objfile struct from the global list of known objfiles. */
735 dbx_symfile_finish (objfile
)
736 struct objfile
*objfile
;
738 if (objfile
->sym_stab_info
!= NULL
)
740 mfree (objfile
-> md
, objfile
->sym_stab_info
);
742 free_header_files ();
746 /* Buffer for reading the symbol table entries. */
747 static struct internal_nlist symbuf
[4096];
748 static int symbuf_idx
;
749 static int symbuf_end
;
751 /* cont_elem is used for continuing information in cfront.
752 It saves information about which types need to be fixed up and
753 completed after all the stabs are read. */
756 /* sym and stabsstring for continuing information in cfront */
759 /* state dependancies (statics that must be preserved) */
763 /* other state dependancies include:
764 (assumption is that these will not change since process_now FIXME!!)
770 static struct cont_elem cont_list
[100];
771 static int cont_count
= 0;
778 /* save state so we can process these stabs later */
779 cont_list
[cont_count
].sym_idx
= symbuf_idx
;
780 cont_list
[cont_count
].sym_end
= symbuf_end
;
781 cont_list
[cont_count
].symnum
= symnum
;
782 cont_list
[cont_count
].sym
= sym
;
783 cont_list
[cont_count
].stabs
= p
;
789 struct objfile
* objfile
;
792 /* save original state */
793 int save_symbuf_idx
= symbuf_idx
;
794 int save_symbuf_end
= symbuf_end
;
795 int save_symnum
= symnum
;
796 for (i
=0; i
<cont_count
; i
++)
798 /* set state as if we were parsing stabs strings
800 symbuf_idx
= cont_list
[i
].sym_idx
; /* statics used by gdb */
801 symbuf_end
= cont_list
[i
].sym_end
;
802 symnum
= cont_list
[i
].symnum
;
803 resolve_cfront_continuation(objfile
,cont_list
[i
].sym
,cont_list
[i
].stabs
);
805 /* restore original state */
806 symbuf_idx
= save_symbuf_idx
;
807 symbuf_end
= save_symbuf_end
;
808 symnum
= save_symnum
;
809 cont_count
=0; /* reset for next run */
813 /* Name of last function encountered. Used in Solaris to approximate
814 object file boundaries. */
815 static char *last_function_name
;
817 /* The address in memory of the string table of the object file we are
818 reading (which might not be the "main" object file, but might be a
819 shared library or some other dynamically loaded thing). This is
820 set by read_dbx_symtab when building psymtabs, and by
821 read_ofile_symtab when building symtabs, and is used only by
822 next_symbol_text. FIXME: If that is true, we don't need it when
823 building psymtabs, right? */
824 static char *stringtab_global
;
826 /* These variables are used to control fill_symbuf when the stabs
827 symbols are not contiguous (as may be the case when a COFF file is
828 linked using --split-by-reloc). */
829 static struct stab_section_list
*symbuf_sections
;
830 static unsigned int symbuf_left
;
831 static unsigned int symbuf_read
;
833 /* Refill the symbol table input buffer
834 and set the variables that control fetching entries from it.
835 Reports an error if no data available.
836 This function can read past the end of the symbol table
837 (into the string table) but this does no harm. */
840 fill_symbuf (sym_bfd
)
846 if (symbuf_sections
== NULL
)
847 count
= sizeof (symbuf
);
850 if (symbuf_left
<= 0)
852 file_ptr filepos
= symbuf_sections
->section
->filepos
;
853 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
854 perror_with_name (bfd_get_filename (sym_bfd
));
855 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
856 symbol_table_offset
= filepos
- symbuf_read
;
857 symbuf_sections
= symbuf_sections
->next
;
861 if (count
> sizeof (symbuf
))
862 count
= sizeof (symbuf
);
865 nbytes
= bfd_read ((PTR
)symbuf
, count
, 1, sym_bfd
);
867 perror_with_name (bfd_get_filename (sym_bfd
));
868 else if (nbytes
== 0)
869 error ("Premature end of file reading symbol table");
870 symbuf_end
= nbytes
/ symbol_size
;
872 symbuf_left
-= nbytes
;
873 symbuf_read
+= nbytes
;
876 #define SWAP_SYMBOL(symp, abfd) \
878 (symp)->n_strx = bfd_h_get_32(abfd, \
879 (unsigned char *)&(symp)->n_strx); \
880 (symp)->n_desc = bfd_h_get_16 (abfd, \
881 (unsigned char *)&(symp)->n_desc); \
882 (symp)->n_value = bfd_h_get_32 (abfd, \
883 (unsigned char *)&(symp)->n_value); \
886 /* Invariant: The symbol pointed to by symbuf_idx is the first one
887 that hasn't been swapped. Swap the symbol at the same time
888 that symbuf_idx is incremented. */
890 /* dbx allows the text of a symbol name to be continued into the
891 next symbol name! When such a continuation is encountered
892 (a \ at the end of the text of a name)
893 call this function to get the continuation. */
896 dbx_next_symbol_text (objfile
)
897 struct objfile
*objfile
;
899 if (symbuf_idx
== symbuf_end
)
900 fill_symbuf (symfile_bfd
);
902 SWAP_SYMBOL(&symbuf
[symbuf_idx
], symfile_bfd
);
903 OBJSTAT (objfile
, n_stabs
++);
904 return symbuf
[symbuf_idx
++].n_strx
+ stringtab_global
905 + file_string_table_offset
;
908 /* Initialize the list of bincls to contain none and have some
912 init_bincl_list (number
, objfile
)
914 struct objfile
*objfile
;
916 bincls_allocated
= number
;
917 next_bincl
= bincl_list
= (struct header_file_location
*)
918 xmmalloc (objfile
-> md
, bincls_allocated
* sizeof(struct header_file_location
));
921 /* Add a bincl to the list. */
924 add_bincl_to_list (pst
, name
, instance
)
925 struct partial_symtab
*pst
;
929 if (next_bincl
>= bincl_list
+ bincls_allocated
)
931 int offset
= next_bincl
- bincl_list
;
932 bincls_allocated
*= 2;
933 bincl_list
= (struct header_file_location
*)
934 xmrealloc (pst
->objfile
->md
, (char *)bincl_list
,
935 bincls_allocated
* sizeof (struct header_file_location
));
936 next_bincl
= bincl_list
+ offset
;
938 next_bincl
->pst
= pst
;
939 next_bincl
->instance
= instance
;
940 next_bincl
++->name
= name
;
943 /* Given a name, value pair, find the corresponding
944 bincl in the list. Return the partial symtab associated
945 with that header_file_location. */
947 static struct partial_symtab
*
948 find_corresponding_bincl_psymtab (name
, instance
)
952 struct header_file_location
*bincl
;
954 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
955 if (bincl
->instance
== instance
956 && STREQ (name
, bincl
->name
))
959 complain (&repeated_header_complaint
, name
, symnum
);
960 return (struct partial_symtab
*) 0;
963 /* Free the storage allocated for the bincl list. */
966 free_bincl_list (objfile
)
967 struct objfile
*objfile
;
969 mfree (objfile
-> md
, (PTR
)bincl_list
);
970 bincls_allocated
= 0;
973 /* Scan a SunOs dynamic symbol table for symbols of interest and
974 add them to the minimal symbol table. */
977 read_dbx_dynamic_symtab (section_offsets
, objfile
)
978 struct section_offsets
*section_offsets
;
979 struct objfile
*objfile
;
981 bfd
*abfd
= objfile
->obfd
;
982 struct cleanup
*back_to
;
995 /* Check that the symbol file has dynamic symbols that we know about.
996 bfd_arch_unknown can happen if we are reading a sun3 symbol file
997 on a sun4 host (and vice versa) and bfd is not configured
998 --with-target=all. This would trigger an assertion in bfd/sunos.c,
999 so we ignore the dynamic symbols in this case. */
1000 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1001 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1002 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1005 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1006 if (dynsym_size
< 0)
1009 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1010 back_to
= make_cleanup (free
, dynsyms
);
1012 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1013 if (dynsym_count
< 0)
1015 do_cleanups (back_to
);
1019 /* Enter dynamic symbols into the minimal symbol table
1020 if this is a stripped executable. */
1021 if (bfd_get_symcount (abfd
) <= 0)
1024 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1026 asymbol
*sym
= *symptr
;
1030 sec
= bfd_get_section (sym
);
1032 /* BFD symbols are section relative. */
1033 sym_value
= sym
->value
+ sec
->vma
;
1035 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1037 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1040 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1042 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
1045 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1047 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
1053 if (sym
->flags
& BSF_GLOBAL
)
1056 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1061 /* Symbols from shared libraries have a dynamic relocation entry
1062 that points to the associated slot in the procedure linkage table.
1063 We make a mininal symbol table entry with type mst_solib_trampoline
1064 at the address in the procedure linkage table. */
1065 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1066 if (dynrel_size
< 0)
1068 do_cleanups (back_to
);
1072 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1073 make_cleanup (free
, dynrels
);
1075 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1076 if (dynrel_count
< 0)
1078 do_cleanups (back_to
);
1082 for (counter
= 0, relptr
= dynrels
;
1083 counter
< dynrel_count
;
1084 counter
++, relptr
++)
1086 arelent
*rel
= *relptr
;
1088 rel
->address
+ ANOFFSET (section_offsets
, SECT_OFF_DATA
);
1090 switch (bfd_get_arch (abfd
))
1092 case bfd_arch_sparc
:
1093 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1097 /* `16' is the type BFD produces for a jump table relocation. */
1098 if (rel
->howto
->type
!= 16)
1101 /* Adjust address in the jump table to point to
1102 the start of the bsr instruction. */
1109 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1110 prim_record_minimal_symbol
1111 (obsavestring (name
, strlen (name
), &objfile
-> symbol_obstack
),
1113 mst_solib_trampoline
,
1117 do_cleanups (back_to
);
1120 /* Given pointers to an a.out symbol table in core containing dbx
1121 style data, setup partial_symtab's describing each source file for
1122 which debugging information is available.
1123 SYMFILE_NAME is the name of the file we are reading from
1124 and SECTION_OFFSETS is the set of offsets for the various sections
1125 of the file (a set of zeros if the mainline program). */
1128 read_dbx_symtab (section_offsets
, objfile
, text_addr
, text_size
)
1129 struct section_offsets
*section_offsets
;
1130 struct objfile
*objfile
;
1131 CORE_ADDR text_addr
;
1134 register struct internal_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1135 register char *namestring
;
1137 int past_first_source_file
= 0;
1138 CORE_ADDR last_o_file_start
= 0;
1139 CORE_ADDR last_function_start
= 0;
1140 struct cleanup
*back_to
;
1143 /* Current partial symtab */
1144 struct partial_symtab
*pst
;
1146 /* List of current psymtab's include files */
1147 char **psymtab_include_list
;
1148 int includes_allocated
;
1151 /* Index within current psymtab dependency list */
1152 struct partial_symtab
**dependency_list
;
1153 int dependencies_used
, dependencies_allocated
;
1155 /* FIXME. We probably want to change stringtab_global rather than add this
1156 while processing every symbol entry. FIXME. */
1157 file_string_table_offset
= 0;
1158 next_file_string_table_offset
= 0;
1160 stringtab_global
= DBX_STRINGTAB (objfile
);
1162 pst
= (struct partial_symtab
*) 0;
1164 includes_allocated
= 30;
1166 psymtab_include_list
= (char **) alloca (includes_allocated
*
1169 dependencies_allocated
= 30;
1170 dependencies_used
= 0;
1172 (struct partial_symtab
**) alloca (dependencies_allocated
*
1173 sizeof (struct partial_symtab
*));
1175 /* Init bincl list */
1176 init_bincl_list (20, objfile
);
1177 back_to
= make_cleanup (free_bincl_list
, objfile
);
1179 last_source_file
= NULL
;
1181 lowest_text_address
= (CORE_ADDR
)-1;
1183 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1184 abfd
= objfile
->obfd
;
1185 symbuf_end
= symbuf_idx
= 0;
1186 next_symbol_text_func
= dbx_next_symbol_text
;
1188 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1190 /* Get the symbol for this run and pull out some info */
1191 QUIT
; /* allow this to be interruptable */
1192 if (symbuf_idx
== symbuf_end
)
1194 bufp
= &symbuf
[symbuf_idx
++];
1197 * Special case to speed up readin.
1199 if (bufp
->n_type
== (unsigned char)N_SLINE
) continue;
1201 SWAP_SYMBOL (bufp
, abfd
);
1202 OBJSTAT (objfile
, n_stabs
++);
1204 /* Ok. There is a lot of code duplicated in the rest of this
1205 switch statement (for efficiency reasons). Since I don't
1206 like duplicating code, I will do my penance here, and
1207 describe the code which is duplicated:
1209 *) The assignment to namestring.
1210 *) The call to strchr.
1211 *) The addition of a partial symbol the the two partial
1212 symbol lists. This last is a large section of code, so
1213 I've imbedded it in the following macro.
1216 /* Set namestring based on bufp. If the string table index is invalid,
1217 give a fake name, and print a single error message per symbol file read,
1218 rather than abort the symbol reading or flood the user with messages. */
1220 /*FIXME: Too many adds and indirections in here for the inner loop. */
1221 #define SET_NAMESTRING()\
1222 if (((unsigned)bufp->n_strx + file_string_table_offset) >= \
1223 DBX_STRINGTAB_SIZE (objfile)) { \
1224 complain (&string_table_offset_complaint, symnum); \
1225 namestring = "<bad string table offset>"; \
1227 namestring = bufp->n_strx + file_string_table_offset + \
1228 DBX_STRINGTAB (objfile)
1230 #define CUR_SYMBOL_TYPE bufp->n_type
1231 #define CUR_SYMBOL_VALUE bufp->n_value
1232 #define DBXREAD_ONLY
1233 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
1234 start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
1235 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
1236 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)
1238 #include "partial-stab.h"
1241 /* If there's stuff to be cleaned up, clean it up. */
1242 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1243 /*FIXME, does this have a bug at start address 0? */
1244 && last_o_file_start
1245 && objfile
-> ei
.entry_point
< bufp
->n_value
1246 && objfile
-> ei
.entry_point
>= last_o_file_start
)
1248 objfile
-> ei
.entry_file_lowpc
= last_o_file_start
;
1249 objfile
-> ei
.entry_file_highpc
= bufp
->n_value
;
1254 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1255 symnum
* symbol_size
,
1256 (lowest_text_address
== (CORE_ADDR
)-1
1257 ? (text_addr
+ section_offsets
->offsets
[SECT_OFF_TEXT
])
1258 : lowest_text_address
)
1260 dependency_list
, dependencies_used
);
1263 do_cleanups (back_to
);
1266 /* Allocate and partially fill a partial symtab. It will be
1267 completely filled at the end of the symbol list.
1269 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1270 is the address relative to which its symbols are (incremental) or 0
1274 struct partial_symtab
*
1275 start_psymtab (objfile
, section_offsets
,
1276 filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
1277 struct objfile
*objfile
;
1278 struct section_offsets
*section_offsets
;
1282 struct partial_symbol
**global_syms
;
1283 struct partial_symbol
**static_syms
;
1285 struct partial_symtab
*result
=
1286 start_psymtab_common(objfile
, section_offsets
,
1287 filename
, textlow
, global_syms
, static_syms
);
1289 result
->read_symtab_private
= (char *)
1290 obstack_alloc (&objfile
-> psymbol_obstack
, sizeof (struct symloc
));
1291 LDSYMOFF(result
) = ldsymoff
;
1292 result
->read_symtab
= dbx_psymtab_to_symtab
;
1293 SYMBOL_SIZE(result
) = symbol_size
;
1294 SYMBOL_OFFSET(result
) = symbol_table_offset
;
1295 STRING_OFFSET(result
) = string_table_offset
;
1296 FILE_STRING_OFFSET(result
) = file_string_table_offset
;
1298 /* If we're handling an ELF file, drag some section-relocation info
1299 for this source file out of the ELF symbol table, to compensate for
1300 Sun brain death. This replaces the section_offsets in this psymtab,
1302 elfstab_offset_sections (objfile
, result
);
1304 /* Deduce the source language from the filename for this psymtab. */
1305 psymtab_language
= deduce_language_from_filename (filename
);
1310 /* Close off the current usage of PST.
1311 Returns PST or NULL if the partial symtab was empty and thrown away.
1313 FIXME: List variables and peculiarities of same. */
1315 struct partial_symtab
*
1316 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
1317 capping_text
, dependency_list
, number_dependencies
)
1318 struct partial_symtab
*pst
;
1319 char **include_list
;
1321 int capping_symbol_offset
;
1322 CORE_ADDR capping_text
;
1323 struct partial_symtab
**dependency_list
;
1324 int number_dependencies
;
1327 struct objfile
*objfile
= pst
-> objfile
;
1329 if (capping_symbol_offset
!= -1)
1330 LDSYMLEN(pst
) = capping_symbol_offset
- LDSYMOFF(pst
);
1331 pst
->texthigh
= capping_text
;
1333 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1334 /* Under Solaris, the N_SO symbols always have a value of 0,
1335 instead of the usual address of the .o file. Therefore,
1336 we have to do some tricks to fill in texthigh and textlow.
1337 The first trick is in partial-stab.h: if we see a static
1338 or global function, and the textlow for the current pst
1339 is still 0, then we use that function's address for
1340 the textlow of the pst. */
1342 /* Now, to fill in texthigh, we remember the last function seen
1343 in the .o file (also in partial-stab.h). Also, there's a hack in
1344 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1345 to here via the misc_info field. Therefore, we can fill in
1346 a reliable texthigh by taking the address plus size of the
1347 last function in the file. */
1349 if (pst
->texthigh
== 0 && last_function_name
) {
1352 struct minimal_symbol
*minsym
;
1354 p
= strchr (last_function_name
, ':');
1356 p
= last_function_name
;
1357 n
= p
- last_function_name
;
1359 strncpy (p
, last_function_name
, n
);
1362 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1365 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) +
1366 (long) MSYMBOL_INFO (minsym
);
1368 last_function_name
= NULL
;
1371 /* this test will be true if the last .o file is only data */
1372 if (pst
->textlow
== 0)
1373 /* This loses if the text section really starts at address zero
1374 (generally true when we are debugging a .o file, for example).
1375 That is why this whole thing is inside SOFUN_ADDRESS_MAYBE_MISSING. */
1376 pst
->textlow
= pst
->texthigh
;
1378 /* If we know our own starting text address, then walk through all other
1379 psymtabs for this objfile, and if any didn't know their ending text
1380 address, set it to our starting address. Take care to not set our
1381 own ending address to our starting address, nor to set addresses on
1382 `dependency' files that have both textlow and texthigh zero. */
1384 struct partial_symtab
*p1
;
1386 ALL_OBJFILE_PSYMTABS (objfile
, p1
) {
1387 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
) {
1388 p1
->texthigh
= pst
->textlow
;
1389 /* if this file has only data, then make textlow match texthigh */
1390 if (p1
->textlow
== 0)
1391 p1
->textlow
= p1
->texthigh
;
1396 /* End of kludge for patching Solaris textlow and texthigh. */
1397 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1399 pst
->n_global_syms
=
1400 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1401 pst
->n_static_syms
=
1402 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1404 pst
->number_of_dependencies
= number_dependencies
;
1405 if (number_dependencies
)
1407 pst
->dependencies
= (struct partial_symtab
**)
1408 obstack_alloc (&objfile
->psymbol_obstack
,
1409 number_dependencies
* sizeof (struct partial_symtab
*));
1410 memcpy (pst
->dependencies
, dependency_list
,
1411 number_dependencies
* sizeof (struct partial_symtab
*));
1414 pst
->dependencies
= 0;
1416 for (i
= 0; i
< num_includes
; i
++)
1418 struct partial_symtab
*subpst
=
1419 allocate_psymtab (include_list
[i
], objfile
);
1421 subpst
->section_offsets
= pst
->section_offsets
;
1422 subpst
->read_symtab_private
=
1423 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1424 sizeof (struct symloc
));
1428 subpst
->texthigh
= 0;
1430 /* We could save slight bits of space by only making one of these,
1431 shared by the entire set of include files. FIXME-someday. */
1432 subpst
->dependencies
= (struct partial_symtab
**)
1433 obstack_alloc (&objfile
->psymbol_obstack
,
1434 sizeof (struct partial_symtab
*));
1435 subpst
->dependencies
[0] = pst
;
1436 subpst
->number_of_dependencies
= 1;
1438 subpst
->globals_offset
=
1439 subpst
->n_global_syms
=
1440 subpst
->statics_offset
=
1441 subpst
->n_static_syms
= 0;
1445 subpst
->read_symtab
= pst
->read_symtab
;
1448 sort_pst_symbols (pst
);
1450 /* If there is already a psymtab or symtab for a file of this name, remove it.
1451 (If there is a symtab, more drastic things also happen.)
1452 This happens in VxWorks. */
1453 free_named_symtabs (pst
->filename
);
1455 if (num_includes
== 0
1456 && number_dependencies
== 0
1457 && pst
->n_global_syms
== 0
1458 && pst
->n_static_syms
== 0)
1460 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1461 it is on the obstack, but we can forget to chain it on the list. */
1462 /* Empty psymtabs happen as a result of header files which don't have
1463 any symbols in them. There can be a lot of them. But this check
1464 is wrong, in that a psymtab with N_SLINE entries but nothing else
1465 is not empty, but we don't realize that. Fixing that without slowing
1466 things down might be tricky. */
1467 struct partial_symtab
*prev_pst
;
1469 /* First, snip it out of the psymtab chain */
1471 if (pst
->objfile
->psymtabs
== pst
)
1472 pst
->objfile
->psymtabs
= pst
->next
;
1474 for (prev_pst
= pst
->objfile
->psymtabs
; prev_pst
; prev_pst
= pst
->next
)
1475 if (prev_pst
->next
== pst
)
1476 prev_pst
->next
= pst
->next
;
1478 /* Next, put it on a free list for recycling */
1480 pst
->next
= pst
->objfile
->free_psymtabs
;
1481 pst
->objfile
->free_psymtabs
= pst
;
1483 /* Indicate that psymtab was thrown away. */
1484 pst
= (struct partial_symtab
*)NULL
;
1490 dbx_psymtab_to_symtab_1 (pst
)
1491 struct partial_symtab
*pst
;
1493 struct cleanup
*old_chain
;
1501 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1506 /* Read in all partial symtabs on which this one is dependent */
1507 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1508 if (!pst
->dependencies
[i
]->readin
)
1510 /* Inform about additional files that need to be read in. */
1513 fputs_filtered (" ", gdb_stdout
);
1515 fputs_filtered ("and ", gdb_stdout
);
1517 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1518 wrap_here (""); /* Flush output */
1519 gdb_flush (gdb_stdout
);
1521 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1524 if (LDSYMLEN(pst
)) /* Otherwise it's a dummy */
1526 /* Init stuff necessary for reading in symbols */
1529 old_chain
= make_cleanup (really_free_pendings
, 0);
1530 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1531 symbol_size
= SYMBOL_SIZE (pst
);
1533 /* Read in this file's symbols */
1534 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1535 read_ofile_symtab (pst
);
1536 sort_symtab_syms (pst
->symtab
);
1538 do_cleanups (old_chain
);
1544 /* Read in all of the symbols for a given psymtab for real.
1545 Be verbose about it if the user wants that. */
1548 dbx_psymtab_to_symtab (pst
)
1549 struct partial_symtab
*pst
;
1558 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1563 if (LDSYMLEN(pst
) || pst
->number_of_dependencies
)
1565 /* Print the message now, before reading the string table,
1566 to avoid disconcerting pauses. */
1569 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1570 gdb_flush (gdb_stdout
);
1573 sym_bfd
= pst
->objfile
->obfd
;
1575 next_symbol_text_func
= dbx_next_symbol_text
;
1577 dbx_psymtab_to_symtab_1 (pst
);
1579 /* Match with global symbols. This only needs to be done once,
1580 after all of the symtabs and dependencies have been read in. */
1581 scan_file_globals (pst
->objfile
);
1583 /* Finish up the debug error message. */
1585 printf_filtered ("done.\n");
1589 /* Read in a defined section of a specific object file's symbols. */
1592 read_ofile_symtab (pst
)
1593 struct partial_symtab
*pst
;
1595 register char *namestring
;
1596 register struct internal_nlist
*bufp
;
1598 unsigned max_symnum
;
1600 struct objfile
*objfile
;
1601 int sym_offset
; /* Offset to start of symbols to read */
1602 int sym_size
; /* Size of symbols to read */
1603 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1604 int text_size
; /* Size of text segment for symbols */
1605 struct section_offsets
*section_offsets
;
1607 objfile
= pst
->objfile
;
1608 sym_offset
= LDSYMOFF(pst
);
1609 sym_size
= LDSYMLEN(pst
);
1610 text_offset
= pst
->textlow
;
1611 text_size
= pst
->texthigh
- pst
->textlow
;
1612 section_offsets
= pst
->section_offsets
;
1614 current_objfile
= objfile
;
1615 subfile_stack
= NULL
;
1617 stringtab_global
= DBX_STRINGTAB (objfile
);
1618 last_source_file
= NULL
;
1620 abfd
= objfile
->obfd
;
1621 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1622 symbuf_end
= symbuf_idx
= 0;
1624 /* It is necessary to actually read one symbol *before* the start
1625 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1626 occurs before the N_SO symbol.
1628 Detecting this in read_dbx_symtab
1629 would slow down initial readin, so we look for it here instead. */
1630 if (!processing_acc_compilation
&& sym_offset
>= (int)symbol_size
)
1632 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1634 bufp
= &symbuf
[symbuf_idx
++];
1635 SWAP_SYMBOL (bufp
, abfd
);
1636 OBJSTAT (objfile
, n_stabs
++);
1640 processing_gcc_compilation
= 0;
1641 if (bufp
->n_type
== N_TEXT
)
1643 const char *tempstring
= namestring
;
1645 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1646 processing_gcc_compilation
= 1;
1647 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1648 processing_gcc_compilation
= 2;
1649 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1651 if (STREQN (tempstring
, "__gnu_compiled", 14))
1652 processing_gcc_compilation
= 2;
1655 /* Try to select a C++ demangling based on the compilation unit
1658 if (processing_gcc_compilation
)
1660 if (AUTO_DEMANGLING
)
1662 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1668 /* The N_SO starting this symtab is the first symbol, so we
1669 better not check the symbol before it. I'm not this can
1670 happen, but it doesn't hurt to check for it. */
1671 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1672 processing_gcc_compilation
= 0;
1675 if (symbuf_idx
== symbuf_end
)
1677 bufp
= &symbuf
[symbuf_idx
];
1678 if (bufp
->n_type
!= (unsigned char)N_SO
)
1679 error("First symbol in segment of executable not a source symbol");
1681 max_symnum
= sym_size
/ symbol_size
;
1684 symnum
< max_symnum
;
1687 QUIT
; /* Allow this to be interruptable */
1688 if (symbuf_idx
== symbuf_end
)
1690 bufp
= &symbuf
[symbuf_idx
++];
1691 SWAP_SYMBOL (bufp
, abfd
);
1692 OBJSTAT (objfile
, n_stabs
++);
1694 type
= bufp
->n_type
;
1698 if (type
& N_STAB
) {
1699 process_one_symbol (type
, bufp
->n_desc
, bufp
->n_value
,
1700 namestring
, section_offsets
, objfile
);
1702 /* We skip checking for a new .o or -l file; that should never
1703 happen in this routine. */
1704 else if (type
== N_TEXT
)
1706 /* I don't think this code will ever be executed, because
1707 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1708 the N_SO symbol which starts this source file.
1709 However, there is no reason not to accept
1710 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1712 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1713 processing_gcc_compilation
= 1;
1714 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1715 processing_gcc_compilation
= 2;
1717 if (AUTO_DEMANGLING
)
1719 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1722 else if (type
& N_EXT
|| type
== (unsigned char)N_TEXT
1723 || type
== (unsigned char)N_NBTEXT
1725 /* Global symbol: see if we came across a dbx defintion for
1726 a corresponding symbol. If so, store the value. Remove
1727 syms from the chain when their values are stored, but
1728 search the whole chain, as there may be several syms from
1729 different files with the same name. */
1730 /* This is probably not true. Since the files will be read
1731 in one at a time, each reference to a global symbol will
1732 be satisfied in each file as it appears. So we skip this
1738 current_objfile
= NULL
;
1740 /* In a Solaris elf file, this variable, which comes from the
1741 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1742 which comes from pst->textlow is correct. */
1743 if (last_source_start_addr
== 0)
1744 last_source_start_addr
= text_offset
;
1746 /* In reordered executables last_source_start_addr may not be the
1747 lower bound for this symtab, instead use text_offset which comes
1748 from pst->textlow which is correct. */
1749 if (last_source_start_addr
> text_offset
)
1750 last_source_start_addr
= text_offset
;
1752 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT
);
1754 if (ARM_DEMANGLING
) /* process incomplete C++ types now */
1755 process_now(objfile
);
1761 /* This handles a single symbol from the symbol-file, building symbols
1762 into a GDB symtab. It takes these arguments and an implicit argument.
1764 TYPE is the type field of the ".stab" symbol entry.
1765 DESC is the desc field of the ".stab" entry.
1766 VALU is the value field of the ".stab" entry.
1767 NAME is the symbol name, in our address space.
1768 SECTION_OFFSETS is a set of amounts by which the sections of this object
1769 file were relocated when it was loaded into memory.
1770 All symbols that refer
1771 to memory locations need to be offset by these amounts.
1772 OBJFILE is the object file from which we are reading symbols.
1773 It is used in end_symtab. */
1776 process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1780 struct section_offsets
*section_offsets
;
1781 struct objfile
*objfile
;
1783 #ifdef SUN_FIXED_LBRAC_BUG
1784 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1785 to correct the address of N_LBRAC's. If it is not defined, then
1786 we never need to correct the addresses. */
1788 /* This records the last pc address we've seen. We depend on there being
1789 an SLINE or FUN or SO before the first LBRAC, since the variable does
1790 not get reset in between reads of different symbol files. */
1791 static CORE_ADDR last_pc_address
;
1794 register struct context_stack
*new;
1795 /* This remembers the address of the start of a function. It is used
1796 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1797 relative to the current function's start address. On systems
1798 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1799 used to relocate these symbol types rather than SECTION_OFFSETS. */
1800 static CORE_ADDR function_start_offset
;
1802 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1803 file. Used to detect the SunPRO solaris compiler. */
1804 static int n_opt_found
;
1806 /* The stab type used for the definition of the last function.
1807 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1808 static int function_stab_type
= 0;
1810 if (!block_address_function_relative
)
1811 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1812 function start address, so just use the text offset. */
1813 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1815 /* Something is wrong if we see real data before
1816 seeing a source file name. */
1818 if (last_source_file
== NULL
&& type
!= (unsigned char)N_SO
)
1820 /* Ignore any symbols which appear before an N_SO symbol. Currently
1821 no one puts symbols there, but we should deal gracefully with the
1822 case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
1823 but this should not be an error (). */
1832 if (! strcmp (name
, ""))
1834 /* This N_FUN marks the end of a function. This closes off the
1836 within_function
= 0;
1837 new = pop_context ();
1839 /* Make a block for the local symbols within. */
1840 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1841 function_start_offset
, function_start_offset
+ valu
,
1846 /* Relocate for dynamic loading */
1847 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1848 goto define_a_symbol
;
1851 /* This "symbol" just indicates the start of an inner lexical
1852 context within a function. */
1854 /* Ignore extra outermost context from SunPRO cc and acc. */
1855 if (n_opt_found
&& desc
== 1)
1858 #if defined(BLOCK_ADDRESS_ABSOLUTE)
1859 /* Relocate for dynamic loading (?). */
1860 valu
+= function_start_offset
;
1862 if (block_address_function_relative
)
1863 /* Relocate for Sun ELF acc fn-relative syms. */
1864 valu
+= function_start_offset
;
1866 /* On most machines, the block addresses are relative to the
1867 N_SO, the linker did not relocate them (sigh). */
1868 valu
+= last_source_start_addr
;
1871 #ifdef SUN_FIXED_LBRAC_BUG
1872 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
) {
1873 /* Patch current LBRAC pc value to match last handy pc value */
1874 complain (&lbrac_complaint
);
1875 valu
= last_pc_address
;
1878 new = push_context (desc
, valu
);
1882 /* This "symbol" just indicates the end of an inner lexical
1883 context that was started with N_LBRAC. */
1885 /* Ignore extra outermost context from SunPRO cc and acc. */
1886 if (n_opt_found
&& desc
== 1)
1889 #if defined(BLOCK_ADDRESS_ABSOLUTE)
1890 /* Relocate for dynamic loading (?). */
1891 valu
+= function_start_offset
;
1893 if (block_address_function_relative
)
1894 /* Relocate for Sun ELF acc fn-relative syms. */
1895 valu
+= function_start_offset
;
1897 /* On most machines, the block addresses are relative to the
1898 N_SO, the linker did not relocate them (sigh). */
1899 valu
+= last_source_start_addr
;
1902 new = pop_context();
1903 if (desc
!= new->depth
)
1904 complain (&lbrac_mismatch_complaint
, symnum
);
1906 /* Some compilers put the variable decls inside of an
1907 LBRAC/RBRAC block. This macro should be nonzero if this
1908 is true. DESC is N_DESC from the N_RBRAC symbol.
1909 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
1910 or the GCC2_COMPILED_SYMBOL. */
1911 #if !defined (VARIABLES_INSIDE_BLOCK)
1912 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
1915 /* Can only use new->locals as local symbols here if we're in
1916 gcc or on a machine that puts them before the lbrack. */
1917 if (!VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1918 local_symbols
= new->locals
;
1920 if (context_stack_depth
1921 > !VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1923 /* This is not the outermost LBRAC...RBRAC pair in the function,
1924 its local symbols preceded it, and are the ones just recovered
1925 from the context stack. Define the block for them (but don't
1926 bother if the block contains no symbols. Should we complain
1927 on blocks without symbols? I can't think of any useful purpose
1929 if (local_symbols
!= NULL
)
1931 /* Muzzle a compiler bug that makes end < start. (which
1932 compilers? Is this ever harmful?). */
1933 if (new->start_addr
> valu
)
1935 complain (&lbrac_rbrac_complaint
);
1936 new->start_addr
= valu
;
1938 /* Make a block for the local symbols within. */
1939 finish_block (0, &local_symbols
, new->old_blocks
,
1940 new->start_addr
, valu
, objfile
);
1945 /* This is the outermost LBRAC...RBRAC pair. There is no
1946 need to do anything; leave the symbols that preceded it
1947 to be attached to the function's own block. We need to
1948 indicate that we just moved outside of the function. */
1949 within_function
= 0;
1952 if (VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1953 /* Now pop locals of block just finished. */
1954 local_symbols
= new->locals
;
1959 /* This kind of symbol indicates the start of an object file. */
1960 /* Relocate for dynamic loading */
1961 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1965 /* This type of symbol indicates the start of data
1966 for one source file.
1967 Finish the symbol table of the previous source file
1968 (if any) and start accumulating a new symbol table. */
1969 /* Relocate for dynamic loading */
1970 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1974 #ifdef SUN_FIXED_LBRAC_BUG
1975 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
1978 #ifdef PCC_SOL_BROKEN
1979 /* pcc bug, occasionally puts out SO for SOL. */
1980 if (context_stack_depth
> 0)
1982 start_subfile (name
, NULL
);
1986 if (last_source_file
)
1988 /* Check if previous symbol was also an N_SO (with some
1989 sanity checks). If so, that one was actually the directory
1990 name, and the current one is the real file name.
1992 if (previous_stab_code
== (unsigned char) N_SO
)
1994 patch_subfile_names (current_subfile
, name
);
1995 break; /* Ignore repeated SOs */
1997 end_symtab (valu
, objfile
, SECT_OFF_TEXT
);
2001 /* Null name means this just marks the end of text for this .o file.
2002 Don't start a new symtab in this case. */
2003 if (*name
== '\000')
2007 start_symtab (name
, NULL
, valu
);
2011 /* This type of symbol indicates the start of data for
2012 a sub-source-file, one whose contents were copied or
2013 included in the compilation of the main source file
2014 (whose name was given in the N_SO symbol.) */
2015 /* Relocate for dynamic loading */
2016 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2017 start_subfile (name
, current_subfile
->dirname
);
2022 add_new_header_file (name
, valu
);
2023 start_subfile (name
, current_subfile
->dirname
);
2027 start_subfile (pop_subfile (), current_subfile
->dirname
);
2031 add_old_header_file (name
, valu
);
2035 /* This type of "symbol" really just records
2036 one line-number -- core-address correspondence.
2037 Enter it in the line list for this symbol table. */
2038 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2039 valu
+= function_start_offset
;
2040 #ifdef SUN_FIXED_LBRAC_BUG
2041 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2043 record_line (current_subfile
, desc
, valu
);
2047 common_block_start (name
, objfile
);
2051 common_block_end (objfile
);
2054 /* The following symbol types need to have the appropriate offset added
2055 to their value; then we process symbol definitions in the name. */
2057 case N_STSYM
: /* Static symbol in data seg */
2058 case N_LCSYM
: /* Static symbol in BSS seg */
2059 case N_ROSYM
: /* Static symbol in Read-only data seg */
2060 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2061 Solaris2's stabs-in-elf makes *most* symbols relative
2062 but leaves a few absolute (at least for Solaris 2.1 and version
2063 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2064 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2065 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2066 This leaves us no choice but to search for the 'S' or 'V'...
2067 (or pass the whole section_offsets stuff down ONE MORE function
2068 call level, which we really don't want to do). */
2072 /* .o files and NLMs have non-zero text seg offsets, but don't need
2073 their static syms offset in this fashion. XXX - This is really a
2074 crock that should be fixed in the solib handling code so that I
2075 don't have to work around it here. */
2077 if (!symfile_relocatable
)
2079 p
= strchr (name
, ':');
2080 if (p
!= 0 && p
[1] == 'S')
2082 /* The linker relocated it. We don't want to add an
2083 elfstab_offset_sections-type offset, but we *do* want
2084 to add whatever solib.c passed to symbol_file_add as
2085 addr (this is known to affect SunOS4, and I suspect ELF
2086 too). Since elfstab_offset_sections currently does not
2087 muck with the text offset (there is no Ttext.text
2088 symbol), we can get addr from the text offset. If
2089 elfstab_offset_sections ever starts dealing with the
2090 text offset, and we still need to do this, we need to
2091 invent a SECT_OFF_ADDR_KLUDGE or something. */
2092 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2093 goto define_a_symbol
;
2096 /* Since it's not the kludge case, re-dispatch to the right handler. */
2098 case N_STSYM
: goto case_N_STSYM
;
2099 case N_LCSYM
: goto case_N_LCSYM
;
2100 case N_ROSYM
: goto case_N_ROSYM
;
2105 case_N_STSYM
: /* Static symbol in data seg */
2106 case N_DSLINE
: /* Source line number, data seg */
2107 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
2108 goto define_a_symbol
;
2110 case_N_LCSYM
: /* Static symbol in BSS seg */
2111 case N_BSLINE
: /* Source line number, bss seg */
2112 /* N_BROWS: overlaps with N_BSLINE */
2113 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
2114 goto define_a_symbol
;
2116 case_N_ROSYM
: /* Static symbol in Read-only data seg */
2117 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA
);
2118 goto define_a_symbol
;
2120 case N_ENTRY
: /* Alternate entry point */
2121 /* Relocate for dynamic loading */
2122 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2123 goto define_a_symbol
;
2125 /* The following symbol types we don't know how to process. Handle
2126 them in a "default" way, but complain to people who care. */
2128 case N_CATCH
: /* Exception handler catcher */
2129 case N_EHDECL
: /* Exception handler name */
2130 case N_PC
: /* Global symbol in Pascal */
2131 case N_M2C
: /* Modula-2 compilation unit */
2132 /* N_MOD2: overlaps with N_EHDECL */
2133 case N_SCOPE
: /* Modula-2 scope information */
2134 case N_ECOML
: /* End common (local name) */
2135 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2140 complain (&unknown_symtype_complaint
, local_hex_string (type
));
2143 /* The following symbol types don't need the address field relocated,
2144 since it is either unused, or is absolute. */
2146 case N_GSYM
: /* Global variable */
2147 case N_NSYMS
: /* Number of symbols (ultrix) */
2148 case N_NOMAP
: /* No map? (ultrix) */
2149 case N_RSYM
: /* Register variable */
2150 case N_DEFD
: /* Modula-2 GNU module dependency */
2151 case N_SSYM
: /* Struct or union element */
2152 case N_LSYM
: /* Local symbol in stack */
2153 case N_PSYM
: /* Parameter variable */
2154 case N_LENG
: /* Length of preceding symbol type */
2158 char *colon_pos
= strchr (name
, ':');
2159 if (colon_pos
== NULL
)
2162 deftype
= colon_pos
[1];
2168 function_stab_type
= type
;
2170 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2171 /* Deal with the SunPRO 3.0 compiler which omits the address
2172 from N_FUN symbols. */
2174 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT
))
2176 struct minimal_symbol
*msym
;
2180 p
= strchr (name
, ':');
2185 strncpy (p
, name
, n
);
2188 msym
= lookup_minimal_symbol (p
, last_source_file
,
2191 valu
= SYMBOL_VALUE_ADDRESS (msym
);
2195 #ifdef SUN_FIXED_LBRAC_BUG
2196 /* The Sun acc compiler, under SunOS4, puts out
2197 functions with N_GSYM or N_STSYM. The problem is
2198 that the address of the symbol is no good (for N_GSYM
2199 it doesn't even attept an address; for N_STSYM it
2200 puts out an address but then it gets relocated
2201 relative to the data segment, not the text segment).
2202 Currently we can't fix this up later as we do for
2203 some types of symbol in scan_file_globals.
2204 Fortunately we do have a way of finding the address -
2205 we know that the value in last_pc_address is either
2206 the one we want (if we're dealing with the first
2207 function in an object file), or somewhere in the
2208 previous function. This means that we can use the
2209 minimal symbol table to get the address. */
2211 /* Starting with release 3.0, the Sun acc compiler,
2212 under SunOS4, puts out functions with N_FUN and a value
2213 of zero. This gets relocated to the start of the text
2214 segment of the module, which is no good either.
2215 Under SunOS4 we can deal with this as N_SLINE and N_SO
2216 entries contain valid absolute addresses.
2217 Release 3.0 acc also puts out N_OPT entries, which makes
2218 it possible to discern acc from cc or gcc. */
2220 if (type
== N_GSYM
|| type
== N_STSYM
2222 && n_opt_found
&& !block_address_function_relative
))
2224 struct minimal_symbol
*m
;
2225 int l
= colon_pos
- name
;
2227 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2228 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
)
2229 && SYMBOL_NAME (m
) [l
] == '\0')
2230 /* last_pc_address was in this function */
2231 valu
= SYMBOL_VALUE (m
);
2232 else if (m
&& SYMBOL_NAME (m
+1)
2233 && STREQN (SYMBOL_NAME (m
+1), name
, l
)
2234 && SYMBOL_NAME (m
+1) [l
] == '\0')
2235 /* last_pc_address was in last function */
2236 valu
= SYMBOL_VALUE (m
+1);
2238 /* Not found - use last_pc_address (for finish_block) */
2239 valu
= last_pc_address
;
2242 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2245 if (block_address_function_relative
)
2246 /* For Solaris 2.0 compilers, the block addresses and
2247 N_SLINE's are relative to the start of the
2248 function. On normal systems, and when using gcc on
2249 Solaris 2.0, these addresses are just absolute, or
2250 relative to the N_SO, depending on
2251 BLOCK_ADDRESS_ABSOLUTE. */
2252 function_start_offset
= valu
;
2254 within_function
= 1;
2255 if (context_stack_depth
> 0)
2257 new = pop_context ();
2258 /* Make a block for the local symbols within. */
2259 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2260 new->start_addr
, valu
, objfile
);
2262 /* Stack must be empty now. */
2263 if (context_stack_depth
!= 0)
2264 complain (&lbrac_unmatched_complaint
, symnum
);
2266 new = push_context (0, valu
);
2267 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2271 define_symbol (valu
, name
, desc
, type
, objfile
);
2277 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2278 for a bunch of other flags, too. Someday we may parse their
2279 flags; for now we ignore theirs and hope they'll ignore ours. */
2280 case N_OPT
: /* Solaris 2: Compiler options */
2283 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2285 processing_gcc_compilation
= 2;
2286 #if 1 /* Works, but is experimental. -fnf */
2287 if (AUTO_DEMANGLING
)
2289 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2298 /* The following symbol types can be ignored. */
2299 case N_OBJ
: /* Solaris 2: Object file dir and name */
2300 /* N_UNDF: Solaris 2: file separator mark */
2301 /* N_UNDF: -- we will never encounter it, since we only process one
2302 file's symbols at once. */
2303 case N_ENDM
: /* Solaris 2: End of module */
2304 case N_MAIN
: /* Name of main routine. */
2308 previous_stab_code
= type
;
2311 /* FIXME: The only difference between this and elfstab_build_psymtabs
2312 is the call to install_minimal_symbols for elf, and the support for
2313 split sections. If the differences are really that small, the code
2314 should be shared. */
2316 /* Scan and build partial symbols for an coff symbol file.
2317 The coff file has already been processed to get its minimal symbols.
2319 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2322 OBJFILE is the object file we are reading symbols from.
2323 ADDR is the address relative to which the symbols are (e.g.
2324 the base address of the text segment).
2325 MAINLINE is true if we are reading the main symbol
2326 table (as opposed to a shared lib or dynamically loaded file).
2327 TEXTADDR is the address of the text section.
2328 TEXTSIZE is the size of the text section.
2329 STABSECTS is the list of .stab sections in OBJFILE.
2330 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2331 .stabstr section exists.
2333 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2334 adjusted for coff details. */
2337 coffstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2338 textaddr
, textsize
, stabsects
,
2339 stabstroffset
, stabstrsize
)
2340 struct objfile
*objfile
;
2341 struct section_offsets
*section_offsets
;
2344 unsigned int textsize
;
2345 struct stab_section_list
*stabsects
;
2346 file_ptr stabstroffset
;
2347 unsigned int stabstrsize
;
2350 bfd
*sym_bfd
= objfile
->obfd
;
2351 char *name
= bfd_get_filename (sym_bfd
);
2352 struct dbx_symfile_info
*info
;
2353 unsigned int stabsize
;
2355 /* There is already a dbx_symfile_info allocated by our caller.
2356 It might even contain some info from the coff symtab to help us. */
2357 info
= (struct dbx_symfile_info
*) objfile
->sym_stab_info
;
2359 DBX_TEXT_ADDR (objfile
) = textaddr
;
2360 DBX_TEXT_SIZE (objfile
) = textsize
;
2362 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2363 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2364 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2366 if (stabstrsize
> bfd_get_size (sym_bfd
))
2367 error ("ridiculous string table size: %d bytes", stabstrsize
);
2368 DBX_STRINGTAB (objfile
) = (char *)
2369 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2370 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+1);
2372 /* Now read in the string table in one big gulp. */
2374 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2376 perror_with_name (name
);
2377 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2378 if (val
!= stabstrsize
)
2379 perror_with_name (name
);
2381 stabsread_new_init ();
2382 buildsym_new_init ();
2383 free_header_files ();
2384 init_header_files ();
2386 processing_acc_compilation
= 1;
2388 /* In a coff file, we've already installed the minimal symbols that came
2389 from the coff (non-stab) symbol table, so always act like an
2390 incremental load here. */
2391 if (stabsects
->next
== NULL
)
2393 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
2394 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2395 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2399 struct stab_section_list
*stabsect
;
2401 DBX_SYMCOUNT (objfile
) = 0;
2402 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
2404 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
2405 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2408 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2410 symbuf_sections
= stabsects
->next
;
2411 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
2415 dbx_symfile_read (objfile
, section_offsets
, 0);
2418 /* Scan and build partial symbols for an ELF symbol file.
2419 This ELF file has already been processed to get its minimal symbols,
2420 and any DWARF symbols that were in it.
2422 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2425 OBJFILE is the object file we are reading symbols from.
2426 ADDR is the address relative to which the symbols are (e.g.
2427 the base address of the text segment).
2428 MAINLINE is true if we are reading the main symbol
2429 table (as opposed to a shared lib or dynamically loaded file).
2430 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2432 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2433 .stabstr section exists.
2435 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2436 adjusted for elf details. */
2439 elfstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2440 staboffset
, stabsize
,
2441 stabstroffset
, stabstrsize
)
2442 struct objfile
*objfile
;
2443 struct section_offsets
*section_offsets
;
2445 file_ptr staboffset
;
2446 unsigned int stabsize
;
2447 file_ptr stabstroffset
;
2448 unsigned int stabstrsize
;
2451 bfd
*sym_bfd
= objfile
->obfd
;
2452 char *name
= bfd_get_filename (sym_bfd
);
2453 struct dbx_symfile_info
*info
;
2454 asection
*text_sect
;
2456 /* There is already a dbx_symfile_info allocated by our caller.
2457 It might even contain some info from the ELF symtab to help us. */
2458 info
= (struct dbx_symfile_info
*) objfile
->sym_stab_info
;
2460 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
2462 error ("Can't find .text section in symbol file");
2463 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2464 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2466 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2467 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2468 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2469 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2470 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2472 if (stabstrsize
> bfd_get_size (sym_bfd
))
2473 error ("ridiculous string table size: %d bytes", stabstrsize
);
2474 DBX_STRINGTAB (objfile
) = (char *)
2475 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2476 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+1);
2478 /* Now read in the string table in one big gulp. */
2480 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2482 perror_with_name (name
);
2483 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2484 if (val
!= stabstrsize
)
2485 perror_with_name (name
);
2487 stabsread_new_init ();
2488 buildsym_new_init ();
2489 free_header_files ();
2490 init_header_files ();
2491 install_minimal_symbols (objfile
);
2493 processing_acc_compilation
= 1;
2495 /* In an elf file, we've already installed the minimal symbols that came
2496 from the elf (non-stab) symbol table, so always act like an
2497 incremental load here. */
2498 dbx_symfile_read (objfile
, section_offsets
, 0);
2501 /* Scan and build partial symbols for a file with special sections for stabs
2502 and stabstrings. The file has already been processed to get its minimal
2503 symbols, and any other symbols that might be necessary to resolve GSYMs.
2505 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2508 OBJFILE is the object file we are reading symbols from.
2509 ADDR is the address relative to which the symbols are (e.g. the base address
2510 of the text segment).
2511 MAINLINE is true if we are reading the main symbol table (as opposed to a
2512 shared lib or dynamically loaded file).
2513 STAB_NAME is the name of the section that contains the stabs.
2514 STABSTR_NAME is the name of the section that contains the stab strings.
2516 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2519 stabsect_build_psymtabs (objfile
, section_offsets
, mainline
, stab_name
,
2520 stabstr_name
, text_name
)
2521 struct objfile
*objfile
;
2522 struct section_offsets
*section_offsets
;
2529 bfd
*sym_bfd
= objfile
->obfd
;
2530 char *name
= bfd_get_filename (sym_bfd
);
2532 asection
*stabstrsect
;
2533 asection
*text_sect
;
2535 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
2536 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
2542 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2543 stab_name
, stabstr_name
);
2545 objfile
->sym_stab_info
= (PTR
) xmalloc (sizeof (struct dbx_symfile_info
));
2546 memset (DBX_SYMFILE_INFO (objfile
), 0, sizeof (struct dbx_symfile_info
));
2548 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
2550 error ("Can't find %s section in symbol file", text_name
);
2551 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2552 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2554 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
2555 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
2556 / DBX_SYMBOL_SIZE (objfile
);
2557 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
2558 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2560 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
2561 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
2562 DBX_STRINGTAB (objfile
) = (char *)
2563 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
2564 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
2566 /* Now read in the string table in one big gulp. */
2568 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
2569 stabstrsect
, /* bfd section */
2570 DBX_STRINGTAB (objfile
), /* input buffer */
2571 0, /* offset into section */
2572 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
2575 perror_with_name (name
);
2577 stabsread_new_init ();
2578 buildsym_new_init ();
2579 free_header_files ();
2580 init_header_files ();
2581 install_minimal_symbols (objfile
);
2583 /* Now, do an incremental load */
2585 processing_acc_compilation
= 1;
2586 dbx_symfile_read (objfile
, section_offsets
, 0);
2589 static struct sym_fns aout_sym_fns
=
2591 bfd_target_aout_flavour
,
2592 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2593 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2594 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2595 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2596 default_symfile_offsets
,
2597 /* sym_offsets: parse user's offsets to internal form */
2598 NULL
/* next: pointer to next struct sym_fns */
2602 _initialize_dbxread ()
2604 add_symtab_fns(&aout_sym_fns
);