1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
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., 675 Mass Ave, Cambridge, MA 02139, 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 */
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 "libbfd.h" /* FIXME Secret internal BFD stuff (bfd_read) */
56 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
60 #include "stabsread.h"
61 #include "gdb-stabs.h"
63 #include "language.h" /* Needed inside partial-stab.h */
64 #include "complaints.h"
66 #include "aout/aout64.h"
67 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
69 #if !defined (SEEK_SET)
74 /* Each partial symbol table entry contains a pointer to private data for the
75 read_symtab() function to use when expanding a partial symbol table entry
76 to a full symbol table entry.
78 For dbxread this structure contains the offset within the file symbol table
79 of first local symbol for this file, and length (in bytes) of the section
80 of the symbol table devoted to this file's symbols (actually, the section
81 bracketed may contain more than just this file's symbols). It also contains
82 further information needed to locate the symbols if they are in an ELF file.
84 If ldsymlen is 0, the only reason for this thing's existence is the
85 dependency list. Nothing else will happen when it is read in. */
87 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
88 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
89 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
90 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
91 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
92 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
93 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
101 int file_string_offset
;
104 /* Macro to determine which symbols to ignore when reading the first symbol
105 of a file. Some machines override this definition. */
106 #ifndef IGNORE_SYMBOL
107 /* This code is used on Ultrix systems. Ignore it */
108 #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
111 /* Remember what we deduced to be the source language of this psymtab. */
113 static enum language psymtab_language
= language_unknown
;
115 /* Nonzero means give verbose info on gdb action. From main.c. */
116 extern int info_verbose
;
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 */
129 static unsigned symbol_table_offset
;
131 /* This is the offset of the string table in the executable file */
132 static unsigned string_table_offset
;
134 /* For elf+stab executables, the n_strx field is not a simple index
135 into the string table. Instead, each .o file has a base offset
136 in the string table, and the associated symbols contain offsets
137 from this base. The following two variables contain the base
138 offset for the current and next .o files. */
139 static unsigned int file_string_table_offset
;
140 static unsigned int next_file_string_table_offset
;
142 /* This is the lowest text address we have yet encountered. */
143 static CORE_ADDR lowest_text_address
;
145 /* Complaints about the symbols we have encountered. */
147 struct complaint lbrac_complaint
=
148 {"bad block start address patched", 0, 0};
150 struct complaint string_table_offset_complaint
=
151 {"bad string table offset in symbol %d", 0, 0};
153 struct complaint unknown_symtype_complaint
=
154 {"unknown symbol type %s", 0, 0};
156 struct complaint unknown_symchar_complaint
=
157 {"unknown symbol descriptor `%c'", 0, 0};
159 struct complaint lbrac_rbrac_complaint
=
160 {"block start larger than block end", 0, 0};
162 struct complaint lbrac_unmatched_complaint
=
163 {"unmatched N_LBRAC before symtab pos %d", 0, 0};
165 struct complaint lbrac_mismatch_complaint
=
166 {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
168 struct complaint repeated_header_complaint
=
169 {"\"repeated\" header file not previously seen, at symtab pos %d", 0, 0};
171 struct complaint repeated_header_name_complaint
=
172 {"\"repeated\" header file not previously seen, named %s", 0, 0};
174 /* During initial symbol readin, we need to have a structure to keep
175 track of which psymtabs have which bincls in them. This structure
176 is used during readin to setup the list of dependencies within each
177 partial symbol table. */
179 struct header_file_location
181 char *name
; /* Name of header file */
182 int instance
; /* See above */
183 struct partial_symtab
*pst
; /* Partial symtab that has the
184 BINCL/EINCL defs for this file */
187 /* The actual list and controling variables */
188 static struct header_file_location
*bincl_list
, *next_bincl
;
189 static int bincls_allocated
;
191 /* Local function prototypes */
194 free_header_files
PARAMS ((void));
197 init_header_files
PARAMS ((void));
200 read_ofile_symtab
PARAMS ((struct partial_symtab
*));
203 dbx_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
206 dbx_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
209 read_dbx_dynamic_symtab
PARAMS ((struct section_offsets
*,
210 struct objfile
*objfile
));
213 read_dbx_symtab
PARAMS ((struct section_offsets
*, struct objfile
*,
217 free_bincl_list
PARAMS ((struct objfile
*));
219 static struct partial_symtab
*
220 find_corresponding_bincl_psymtab
PARAMS ((char *, int));
223 add_bincl_to_list
PARAMS ((struct partial_symtab
*, char *, int));
226 init_bincl_list
PARAMS ((int, struct objfile
*));
229 init_psymbol_list
PARAMS ((struct objfile
*));
232 dbx_next_symbol_text
PARAMS ((void));
235 fill_symbuf
PARAMS ((bfd
*));
238 dbx_symfile_init
PARAMS ((struct objfile
*));
241 dbx_new_init
PARAMS ((struct objfile
*));
244 dbx_symfile_read
PARAMS ((struct objfile
*, struct section_offsets
*, int));
247 dbx_symfile_finish
PARAMS ((struct objfile
*));
250 record_minimal_symbol
PARAMS ((char *, CORE_ADDR
, int, struct objfile
*));
253 add_new_header_file
PARAMS ((char *, int));
256 add_old_header_file
PARAMS ((char *, int));
259 add_this_object_header_file
PARAMS ((int));
261 /* Free up old header file tables */
268 if (header_files
!= NULL
)
270 for (i
= 0; i
< n_header_files
; i
++)
272 free (header_files
[i
].name
);
274 free ((PTR
)header_files
);
278 if (this_object_header_files
)
280 free ((PTR
)this_object_header_files
);
281 this_object_header_files
= NULL
;
283 n_allocated_header_files
= 0;
284 n_allocated_this_object_header_files
= 0;
287 /* Allocate new header file tables */
293 n_allocated_header_files
= 10;
294 header_files
= (struct header_file
*)
295 xmalloc (10 * sizeof (struct header_file
));
297 n_allocated_this_object_header_files
= 10;
298 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
301 /* Add header file number I for this object file
302 at the next successive FILENUM. */
305 add_this_object_header_file (i
)
308 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
310 n_allocated_this_object_header_files
*= 2;
311 this_object_header_files
312 = (int *) xrealloc ((char *) this_object_header_files
,
313 n_allocated_this_object_header_files
* sizeof (int));
316 this_object_header_files
[n_this_object_header_files
++] = i
;
319 /* Add to this file an "old" header file, one already seen in
320 a previous object file. NAME is the header file's name.
321 INSTANCE is its instance code, to select among multiple
322 symbol tables for the same header file. */
325 add_old_header_file (name
, instance
)
329 register struct header_file
*p
= header_files
;
332 for (i
= 0; i
< n_header_files
; i
++)
333 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
335 add_this_object_header_file (i
);
338 complain (&repeated_header_complaint
, symnum
);
339 complain (&repeated_header_name_complaint
, name
);
342 /* Add to this file a "new" header file: definitions for its types follow.
343 NAME is the header file's name.
344 Most often this happens only once for each distinct header file,
345 but not necessarily. If it happens more than once, INSTANCE has
346 a different value each time, and references to the header file
347 use INSTANCE values to select among them.
349 dbx output contains "begin" and "end" markers for each new header file,
350 but at this level we just need to know which files there have been;
351 so we record the file when its "begin" is seen and ignore the "end". */
354 add_new_header_file (name
, instance
)
360 /* Make sure there is room for one more header file. */
362 if (n_header_files
== n_allocated_header_files
)
364 n_allocated_header_files
*= 2;
365 header_files
= (struct header_file
*)
366 xrealloc ((char *) header_files
,
367 (n_allocated_header_files
* sizeof (struct header_file
)));
370 /* Create an entry for this header file. */
372 i
= n_header_files
++;
373 header_files
[i
].name
= savestring (name
, strlen(name
));
374 header_files
[i
].instance
= instance
;
375 header_files
[i
].length
= 10;
376 header_files
[i
].vector
377 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
378 memset (header_files
[i
].vector
, 0, 10 * sizeof (struct type
*));
380 add_this_object_header_file (i
);
384 static struct type
**
385 explicit_lookup_type (real_filenum
, index
)
386 int real_filenum
, index
;
388 register struct header_file
*f
= &header_files
[real_filenum
];
390 if (index
>= f
->length
)
393 f
->vector
= (struct type
**)
394 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
395 memset (&f
->vector
[f
->length
/ 2],
396 '\0', f
->length
* sizeof (struct type
*) / 2);
398 return &f
->vector
[index
];
403 record_minimal_symbol (name
, address
, type
, objfile
)
407 struct objfile
*objfile
;
409 enum minimal_symbol_type ms_type
;
413 case N_TEXT
| N_EXT
: ms_type
= mst_text
; break;
414 case N_DATA
| N_EXT
: ms_type
= mst_data
; break;
415 case N_BSS
| N_EXT
: ms_type
= mst_bss
; break;
416 case N_ABS
| N_EXT
: ms_type
= mst_abs
; break;
418 case N_SETV
| N_EXT
: ms_type
= mst_data
; break;
420 /* I don't think this type actually exists; since a N_SETV is the result
421 of going over many .o files, it doesn't make sense to have one
423 ms_type
= mst_file_data
;
430 ms_type
= mst_file_text
;
434 ms_type
= mst_file_data
;
436 /* Check for __DYNAMIC, which is used by Sun shared libraries.
437 Record it as global even if it's local, not global, so
438 lookup_minimal_symbol can find it. We don't check symbol_leading_char
439 because for SunOS4 it always is '_'. */
440 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
443 /* Same with virtual function tables, both global and static. */
445 char *tempstring
= name
;
446 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
448 if (VTBL_PREFIX_P ((tempstring
)))
454 ms_type
= mst_file_bss
;
457 default: ms_type
= mst_unknown
; break;
460 if (ms_type
== mst_file_text
|| ms_type
== mst_text
461 && address
< lowest_text_address
)
462 lowest_text_address
= address
;
464 prim_record_minimal_symbol
465 (obsavestring (name
, strlen (name
), &objfile
-> symbol_obstack
),
471 /* Scan and build partial symbols for a symbol file.
472 We have been initialized by a call to dbx_symfile_init, which
473 put all the relevant info into a "struct dbx_symfile_info",
474 hung off the objfile structure.
476 SECTION_OFFSETS contains offsets relative to which the symbols in the
477 various sections are (depending where the sections were actually loaded).
478 MAINLINE is true if we are reading the main symbol
479 table (as opposed to a shared lib or dynamically loaded file). */
482 dbx_symfile_read (objfile
, section_offsets
, mainline
)
483 struct objfile
*objfile
;
484 struct section_offsets
*section_offsets
;
485 int mainline
; /* FIXME comments above */
489 struct cleanup
*back_to
;
491 sym_bfd
= objfile
->obfd
;
492 val
= bfd_seek (objfile
->obfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
494 perror_with_name (objfile
->name
);
496 /* If we are reinitializing, or if we have never loaded syms yet, init */
497 if (mainline
|| objfile
->global_psymbols
.size
== 0 || objfile
->static_psymbols
.size
== 0)
498 init_psymbol_list (objfile
);
500 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
501 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
504 back_to
= make_cleanup (really_free_pendings
, 0);
506 init_minimal_symbol_collection ();
507 make_cleanup (discard_minimal_symbols
, 0);
509 /* Now that the symbol table data of the executable file are all in core,
510 process them and define symbols accordingly. */
512 read_dbx_symtab (section_offsets
, objfile
,
513 bfd_section_vma (sym_bfd
, DBX_TEXT_SECT (objfile
)),
514 bfd_section_size (sym_bfd
, DBX_TEXT_SECT (objfile
)));
516 /* Add the dynamic symbols if we are reading the main symbol table. */
519 read_dbx_dynamic_symtab (section_offsets
, objfile
);
521 /* Install any minimal symbols that have been collected as the current
522 minimal symbols for this objfile. */
524 install_minimal_symbols (objfile
);
526 if (!have_partial_symbols ()) {
528 printf_filtered ("(no debugging symbols found)...");
532 do_cleanups (back_to
);
535 /* Initialize anything that needs initializing when a completely new
536 symbol file is specified (not just adding some symbols from another
537 file, e.g. a shared library). */
540 dbx_new_init (ignore
)
541 struct objfile
*ignore
;
543 stabsread_new_init ();
544 buildsym_new_init ();
545 init_header_files ();
549 /* dbx_symfile_init ()
550 is the dbx-specific initialization routine for reading symbols.
551 It is passed a struct objfile which contains, among other things,
552 the BFD for the file whose symbols are being read, and a slot for a pointer
553 to "private data" which we fill with goodies.
555 We read the string table into malloc'd space and stash a pointer to it.
557 Since BFD doesn't know how to read debug symbols in a format-independent
558 way (and may never do so...), we have to do it ourselves. We will never
559 be called unless this is an a.out (or very similar) file.
560 FIXME, there should be a cleaner peephole into the BFD environment here. */
562 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
565 dbx_symfile_init (objfile
)
566 struct objfile
*objfile
;
569 bfd
*sym_bfd
= objfile
->obfd
;
570 char *name
= bfd_get_filename (sym_bfd
);
571 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
573 /* Allocate struct to keep track of the symfile */
574 objfile
->sym_stab_info
= (PTR
)
575 xmmalloc (objfile
-> md
, sizeof (struct dbx_symfile_info
));
577 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
578 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
579 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
581 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
583 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
584 DBX_TEXT_SECT (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
585 if (!DBX_TEXT_SECT (objfile
))
586 error ("Can't find .text section in symbol file");
588 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
589 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
590 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
592 /* Read the string table and stash it away in the psymbol_obstack. It is
593 only needed as long as we need to expand psymbols into full symbols,
594 so when we blow away the psymbol the string table goes away as well.
595 Note that gdb used to use the results of attempting to malloc the
596 string table, based on the size it read, as a form of sanity check
597 for botched byte swapping, on the theory that a byte swapped string
598 table size would be so totally bogus that the malloc would fail. Now
599 that we put in on the psymbol_obstack, we can't do this since gdb gets
600 a fatal error (out of virtual memory) if the size is bogus. We can
601 however at least check to see if the size is less than the size of
602 the size field itself, or larger than the size of the entire file.
603 Note that all valid string tables have a size greater than zero, since
604 the bytes used to hold the size are included in the count. */
606 if (STRING_TABLE_OFFSET
== 0)
608 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
609 will never be zero, even when there is no string table. This
610 would appear to be a bug in bfd. */
611 DBX_STRINGTAB_SIZE (objfile
) = 0;
612 DBX_STRINGTAB (objfile
) = NULL
;
616 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
618 perror_with_name (name
);
620 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
621 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
624 perror_with_name (name
);
628 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
629 EOF if there is no string table, and attempting to read the size
630 from EOF will read zero bytes. */
631 DBX_STRINGTAB_SIZE (objfile
) = 0;
632 DBX_STRINGTAB (objfile
) = NULL
;
636 /* Read some data that would appear to be the string table size.
637 If there really is a string table, then it is probably the right
638 size. Byteswap if necessary and validate the size. Note that
639 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
640 random data that happened to be at STRING_TABLE_OFFSET, because
641 bfd can't tell us there is no string table, the sanity checks may
642 or may not catch this. */
643 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
645 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
646 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
647 error ("ridiculous string table size (%d bytes).",
648 DBX_STRINGTAB_SIZE (objfile
));
650 DBX_STRINGTAB (objfile
) =
651 (char *) obstack_alloc (&objfile
-> psymbol_obstack
,
652 DBX_STRINGTAB_SIZE (objfile
));
654 /* Now read in the string table in one big gulp. */
656 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
658 perror_with_name (name
);
659 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
661 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
662 perror_with_name (name
);
667 /* Perform any local cleanups required when we are done with a particular
668 objfile. I.E, we are in the process of discarding all symbol information
669 for an objfile, freeing up all memory held for it, and unlinking the
670 objfile struct from the global list of known objfiles. */
673 dbx_symfile_finish (objfile
)
674 struct objfile
*objfile
;
676 if (objfile
->sym_stab_info
!= NULL
)
678 mfree (objfile
-> md
, objfile
->sym_stab_info
);
680 free_header_files ();
684 /* Buffer for reading the symbol table entries. */
685 static struct internal_nlist symbuf
[4096];
686 static int symbuf_idx
;
687 static int symbuf_end
;
689 /* Name of last function encountered. Used in Solaris to approximate
690 object file boundaries. */
691 static char *last_function_name
;
693 /* The address in memory of the string table of the object file we are
694 reading (which might not be the "main" object file, but might be a
695 shared library or some other dynamically loaded thing). This is set
696 by read_dbx_symtab when building psymtabs, and by read_ofile_symtab
697 when building symtabs, and is used only by next_symbol_text. */
698 static char *stringtab_global
;
700 /* Refill the symbol table input buffer
701 and set the variables that control fetching entries from it.
702 Reports an error if no data available.
703 This function can read past the end of the symbol table
704 (into the string table) but this does no harm. */
707 fill_symbuf (sym_bfd
)
710 int nbytes
= bfd_read ((PTR
)symbuf
, sizeof (symbuf
), 1, sym_bfd
);
712 perror_with_name (bfd_get_filename (sym_bfd
));
713 else if (nbytes
== 0)
714 error ("Premature end of file reading symbol table");
715 symbuf_end
= nbytes
/ symbol_size
;
719 #define SWAP_SYMBOL(symp, abfd) \
721 (symp)->n_strx = bfd_h_get_32(abfd, \
722 (unsigned char *)&(symp)->n_strx); \
723 (symp)->n_desc = bfd_h_get_16 (abfd, \
724 (unsigned char *)&(symp)->n_desc); \
725 (symp)->n_value = bfd_h_get_32 (abfd, \
726 (unsigned char *)&(symp)->n_value); \
729 /* Invariant: The symbol pointed to by symbuf_idx is the first one
730 that hasn't been swapped. Swap the symbol at the same time
731 that symbuf_idx is incremented. */
733 /* dbx allows the text of a symbol name to be continued into the
734 next symbol name! When such a continuation is encountered
735 (a \ at the end of the text of a name)
736 call this function to get the continuation. */
739 dbx_next_symbol_text ()
741 if (symbuf_idx
== symbuf_end
)
742 fill_symbuf (symfile_bfd
);
744 SWAP_SYMBOL(&symbuf
[symbuf_idx
], symfile_bfd
);
745 return symbuf
[symbuf_idx
++].n_strx
+ stringtab_global
746 + file_string_table_offset
;
749 /* Initializes storage for all of the partial symbols that will be
750 created by read_dbx_symtab and subsidiaries. */
753 init_psymbol_list (objfile
)
754 struct objfile
*objfile
;
756 /* Free any previously allocated psymbol lists. */
757 if (objfile
-> global_psymbols
.list
)
758 mfree (objfile
-> md
, (PTR
)objfile
-> global_psymbols
.list
);
759 if (objfile
-> static_psymbols
.list
)
760 mfree (objfile
-> md
, (PTR
)objfile
-> static_psymbols
.list
);
762 /* Current best guess is that there are approximately a twentieth
763 of the total symbols (in a debugging file) are global or static
765 objfile
-> global_psymbols
.size
= DBX_SYMCOUNT (objfile
) / 10;
766 objfile
-> static_psymbols
.size
= DBX_SYMCOUNT (objfile
) / 10;
767 objfile
-> global_psymbols
.next
= objfile
-> global_psymbols
.list
= (struct partial_symbol
*)
768 xmmalloc (objfile
-> md
, objfile
-> global_psymbols
.size
* sizeof (struct partial_symbol
));
769 objfile
-> static_psymbols
.next
= objfile
-> static_psymbols
.list
= (struct partial_symbol
*)
770 xmmalloc (objfile
-> md
, objfile
-> static_psymbols
.size
* sizeof (struct partial_symbol
));
773 /* Initialize the list of bincls to contain none and have some
777 init_bincl_list (number
, objfile
)
779 struct objfile
*objfile
;
781 bincls_allocated
= number
;
782 next_bincl
= bincl_list
= (struct header_file_location
*)
783 xmmalloc (objfile
-> md
, bincls_allocated
* sizeof(struct header_file_location
));
786 /* Add a bincl to the list. */
789 add_bincl_to_list (pst
, name
, instance
)
790 struct partial_symtab
*pst
;
794 if (next_bincl
>= bincl_list
+ bincls_allocated
)
796 int offset
= next_bincl
- bincl_list
;
797 bincls_allocated
*= 2;
798 bincl_list
= (struct header_file_location
*)
799 xmrealloc (pst
->objfile
->md
, (char *)bincl_list
,
800 bincls_allocated
* sizeof (struct header_file_location
));
801 next_bincl
= bincl_list
+ offset
;
803 next_bincl
->pst
= pst
;
804 next_bincl
->instance
= instance
;
805 next_bincl
++->name
= name
;
808 /* Given a name, value pair, find the corresponding
809 bincl in the list. Return the partial symtab associated
810 with that header_file_location. */
812 static struct partial_symtab
*
813 find_corresponding_bincl_psymtab (name
, instance
)
817 struct header_file_location
*bincl
;
819 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
820 if (bincl
->instance
== instance
821 && STREQ (name
, bincl
->name
))
824 return (struct partial_symtab
*) 0;
827 /* Free the storage allocated for the bincl list. */
830 free_bincl_list (objfile
)
831 struct objfile
*objfile
;
833 mfree (objfile
-> md
, (PTR
)bincl_list
);
834 bincls_allocated
= 0;
837 /* Scan a SunOs dynamic symbol table for symbols of interest and
838 add them to the minimal symbol table. */
841 read_dbx_dynamic_symtab (section_offsets
, objfile
)
842 struct section_offsets
*section_offsets
;
843 struct objfile
*objfile
;
845 bfd
*abfd
= objfile
->obfd
;
846 struct cleanup
*back_to
;
858 /* Check that the symbol file has dynamic symbols that we know about.
859 bfd_arch_unknown can happen if we are reading a sun3 symbol file
860 on a sun4 host (and vice versa) and bfd is not configured
861 --with-target=all. This would trigger an assertion in bfd/sunos.c,
862 so we ignore the dynamic symbols in this case. */
863 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
864 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
865 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
868 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
872 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
873 back_to
= make_cleanup (free
, dynsyms
);
875 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
876 if (dynsym_count
< 0)
878 do_cleanups (back_to
);
882 /* Enter dynamic symbols into the minimal symbol table
883 if this is a stripped executable. */
884 if (bfd_get_symcount (abfd
) <= 0)
887 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
889 asymbol
*sym
= *symptr
;
893 sec
= bfd_get_section (sym
);
895 /* BFD symbols are section relative. */
896 sym_value
= sym
->value
+ sec
->vma
;
898 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
900 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
903 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
905 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
908 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
910 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
916 if (sym
->flags
& BSF_GLOBAL
)
919 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
924 /* Symbols from shared libraries have a dynamic relocation entry
925 that points to the associated slot in the procedure linkage table.
926 We make a mininal symbol table entry with type mst_solib_trampoline
927 at the address in the procedure linkage table. */
928 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
931 do_cleanups (back_to
);
935 dynrels
= (arelent
**) xmalloc (dynrel_size
);
936 make_cleanup (free
, dynrels
);
938 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
939 if (dynrel_count
< 0)
941 do_cleanups (back_to
);
945 for (counter
= 0, relptr
= dynrels
;
946 counter
< dynrel_count
;
949 arelent
*rel
= *relptr
;
950 CORE_ADDR address
= rel
->address
;
952 switch (bfd_get_arch (abfd
))
955 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
959 /* `16' is the type BFD produces for a jump table relocation. */
960 if (rel
->howto
->type
!= 16)
963 /* Adjust address in the jump table to point to
964 the start of the bsr instruction. */
971 prim_record_minimal_symbol (bfd_asymbol_name (*rel
->sym_ptr_ptr
),
973 mst_solib_trampoline
,
977 do_cleanups (back_to
);
980 /* Given pointers to an a.out symbol table in core containing dbx
981 style data, setup partial_symtab's describing each source file for
982 which debugging information is available.
983 SYMFILE_NAME is the name of the file we are reading from
984 and SECTION_OFFSETS is the set of offsets for the various sections
985 of the file (a set of zeros if the mainline program). */
988 read_dbx_symtab (section_offsets
, objfile
, text_addr
, text_size
)
989 struct section_offsets
*section_offsets
;
990 struct objfile
*objfile
;
994 register struct internal_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
995 register char *namestring
;
997 int past_first_source_file
= 0;
998 CORE_ADDR last_o_file_start
= 0;
999 struct cleanup
*back_to
;
1002 /* Current partial symtab */
1003 struct partial_symtab
*pst
;
1005 /* List of current psymtab's include files */
1006 char **psymtab_include_list
;
1007 int includes_allocated
;
1010 /* Index within current psymtab dependency list */
1011 struct partial_symtab
**dependency_list
;
1012 int dependencies_used
, dependencies_allocated
;
1014 /* FIXME. We probably want to change stringtab_global rather than add this
1015 while processing every symbol entry. FIXME. */
1016 file_string_table_offset
= 0;
1017 next_file_string_table_offset
= 0;
1019 stringtab_global
= DBX_STRINGTAB (objfile
);
1021 pst
= (struct partial_symtab
*) 0;
1023 includes_allocated
= 30;
1025 psymtab_include_list
= (char **) alloca (includes_allocated
*
1028 dependencies_allocated
= 30;
1029 dependencies_used
= 0;
1031 (struct partial_symtab
**) alloca (dependencies_allocated
*
1032 sizeof (struct partial_symtab
*));
1034 /* Init bincl list */
1035 init_bincl_list (20, objfile
);
1036 back_to
= make_cleanup (free_bincl_list
, objfile
);
1038 last_source_file
= NULL
;
1040 lowest_text_address
= (CORE_ADDR
)-1;
1042 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1043 abfd
= objfile
->obfd
;
1044 symbuf_end
= symbuf_idx
= 0;
1045 next_symbol_text_func
= dbx_next_symbol_text
;
1047 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1049 /* Get the symbol for this run and pull out some info */
1050 QUIT
; /* allow this to be interruptable */
1051 if (symbuf_idx
== symbuf_end
)
1053 bufp
= &symbuf
[symbuf_idx
++];
1056 * Special case to speed up readin.
1058 if (bufp
->n_type
== (unsigned char)N_SLINE
) continue;
1060 SWAP_SYMBOL (bufp
, abfd
);
1062 /* Ok. There is a lot of code duplicated in the rest of this
1063 switch statement (for efficiency reasons). Since I don't
1064 like duplicating code, I will do my penance here, and
1065 describe the code which is duplicated:
1067 *) The assignment to namestring.
1068 *) The call to strchr.
1069 *) The addition of a partial symbol the the two partial
1070 symbol lists. This last is a large section of code, so
1071 I've imbedded it in the following macro.
1074 /* Set namestring based on bufp. If the string table index is invalid,
1075 give a fake name, and print a single error message per symbol file read,
1076 rather than abort the symbol reading or flood the user with messages. */
1078 /*FIXME: Too many adds and indirections in here for the inner loop. */
1079 #define SET_NAMESTRING()\
1080 if (((unsigned)bufp->n_strx + file_string_table_offset) >= \
1081 DBX_STRINGTAB_SIZE (objfile)) { \
1082 complain (&string_table_offset_complaint, symnum); \
1083 namestring = "<bad string table offset>"; \
1085 namestring = bufp->n_strx + file_string_table_offset + \
1086 DBX_STRINGTAB (objfile)
1088 #define CUR_SYMBOL_TYPE bufp->n_type
1089 #define CUR_SYMBOL_VALUE bufp->n_value
1090 #define DBXREAD_ONLY
1091 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
1092 start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
1093 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
1094 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)
1096 #include "partial-stab.h"
1099 /* If there's stuff to be cleaned up, clean it up. */
1100 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1101 /*FIXME, does this have a bug at start address 0? */
1102 && last_o_file_start
1103 && objfile
-> ei
.entry_point
< bufp
->n_value
1104 && objfile
-> ei
.entry_point
>= last_o_file_start
)
1106 objfile
-> ei
.entry_file_lowpc
= last_o_file_start
;
1107 objfile
-> ei
.entry_file_highpc
= bufp
->n_value
;
1112 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1113 symnum
* symbol_size
,
1114 (lowest_text_address
== (CORE_ADDR
)-1
1115 ? (text_addr
+ section_offsets
->offsets
[SECT_OFF_TEXT
])
1116 : lowest_text_address
)
1118 dependency_list
, dependencies_used
);
1121 do_cleanups (back_to
);
1124 /* Allocate and partially fill a partial symtab. It will be
1125 completely filled at the end of the symbol list.
1127 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1128 is the address relative to which its symbols are (incremental) or 0
1132 struct partial_symtab
*
1133 start_psymtab (objfile
, section_offsets
,
1134 filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
1135 struct objfile
*objfile
;
1136 struct section_offsets
*section_offsets
;
1140 struct partial_symbol
*global_syms
;
1141 struct partial_symbol
*static_syms
;
1143 struct partial_symtab
*result
=
1144 start_psymtab_common(objfile
, section_offsets
,
1145 filename
, textlow
, global_syms
, static_syms
);
1147 result
->read_symtab_private
= (char *)
1148 obstack_alloc (&objfile
-> psymbol_obstack
, sizeof (struct symloc
));
1149 LDSYMOFF(result
) = ldsymoff
;
1150 result
->read_symtab
= dbx_psymtab_to_symtab
;
1151 SYMBOL_SIZE(result
) = symbol_size
;
1152 SYMBOL_OFFSET(result
) = symbol_table_offset
;
1153 STRING_OFFSET(result
) = string_table_offset
;
1154 FILE_STRING_OFFSET(result
) = file_string_table_offset
;
1156 /* If we're handling an ELF file, drag some section-relocation info
1157 for this source file out of the ELF symbol table, to compensate for
1158 Sun brain death. This replaces the section_offsets in this psymtab,
1160 elfstab_offset_sections (objfile
, result
);
1162 /* Deduce the source language from the filename for this psymtab. */
1163 psymtab_language
= deduce_language_from_filename (filename
);
1168 /* Close off the current usage of PST.
1169 Returns PST or NULL if the partial symtab was empty and thrown away.
1171 FIXME: List variables and peculiarities of same. */
1173 struct partial_symtab
*
1174 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
1175 capping_text
, dependency_list
, number_dependencies
)
1176 struct partial_symtab
*pst
;
1177 char **include_list
;
1179 int capping_symbol_offset
;
1180 CORE_ADDR capping_text
;
1181 struct partial_symtab
**dependency_list
;
1182 int number_dependencies
;
1185 struct partial_symtab
*p1
;
1186 struct objfile
*objfile
= pst
-> objfile
;
1188 if (capping_symbol_offset
!= -1)
1189 LDSYMLEN(pst
) = capping_symbol_offset
- LDSYMOFF(pst
);
1190 pst
->texthigh
= capping_text
;
1192 #ifdef N_SO_ADDRESS_MAYBE_MISSING
1193 /* Under Solaris, the N_SO symbols always have a value of 0,
1194 instead of the usual address of the .o file. Therefore,
1195 we have to do some tricks to fill in texthigh and textlow.
1196 The first trick is in partial-stab.h: if we see a static
1197 or global function, and the textlow for the current pst
1198 is still 0, then we use that function's address for
1199 the textlow of the pst.
1201 Now, to fill in texthigh, we remember the last function seen
1202 in the .o file (also in partial-stab.h). Also, there's a hack in
1203 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1204 to here via the misc_info field. Therefore, we can fill in
1205 a reliable texthigh by taking the address plus size of the
1206 last function in the file.
1208 Unfortunately, that does not cover the case where the last function
1209 in the file is static. See the paragraph below for more comments
1212 Finally, if we have a valid textlow for the current file, we run
1213 down the partial_symtab_list filling in previous texthighs that
1214 are still unknown. */
1216 if (pst
->texthigh
== 0 && last_function_name
) {
1219 struct minimal_symbol
*minsym
;
1221 p
= strchr (last_function_name
, ':');
1223 p
= last_function_name
;
1224 n
= p
- last_function_name
;
1226 strncpy (p
, last_function_name
, n
);
1229 minsym
= lookup_minimal_symbol (p
, objfile
);
1232 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) +
1233 (long) MSYMBOL_INFO (minsym
);
1235 /* This file ends with a static function, and it's
1236 difficult to imagine how hard it would be to track down
1237 the elf symbol. Luckily, most of the time no one will notice,
1238 since the next file will likely be compiled with -g, so
1239 the code below will copy the first fuction's start address
1240 back to our texthigh variable. (Also, if this file is the
1241 last one in a dynamically linked program, texthigh already
1242 has the right value.) If the next file isn't compiled
1243 with -g, then the last function in this file winds up owning
1244 all of the text space up to the next -g file, or the end (minus
1245 shared libraries). This only matters for single stepping,
1246 and even then it will still work, except that it will single
1247 step through all of the covered functions, instead of setting
1248 breakpoints around them as it usualy does. This makes it
1249 pretty slow, but at least it doesn't fail.
1251 We can fix this with a fairly big change to bfd, but we need
1252 to coordinate better with Cygnus if we want to do that. FIXME. */
1254 last_function_name
= NULL
;
1257 /* this test will be true if the last .o file is only data */
1258 if (pst
->textlow
== 0)
1259 /* This loses if the text section really starts at address zero
1260 (generally true when we are debugging a .o file, for example).
1261 That is why this whole thing is inside N_SO_ADDRESS_MAYBE_MISSING. */
1262 pst
->textlow
= pst
->texthigh
;
1264 /* If we know our own starting text address, then walk through all other
1265 psymtabs for this objfile, and if any didn't know their ending text
1266 address, set it to our starting address. Take care to not set our
1267 own ending address to our starting address, nor to set addresses on
1268 `dependency' files that have both textlow and texthigh zero. */
1270 ALL_OBJFILE_PSYMTABS (objfile
, p1
) {
1271 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
) {
1272 p1
->texthigh
= pst
->textlow
;
1273 /* if this file has only data, then make textlow match texthigh */
1274 if (p1
->textlow
== 0)
1275 p1
->textlow
= p1
->texthigh
;
1280 /* End of kludge for patching Solaris textlow and texthigh. */
1281 #endif /* N_SO_ADDRESS_MAYBE_MISSING. */
1283 pst
->n_global_syms
=
1284 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1285 pst
->n_static_syms
=
1286 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1288 pst
->number_of_dependencies
= number_dependencies
;
1289 if (number_dependencies
)
1291 pst
->dependencies
= (struct partial_symtab
**)
1292 obstack_alloc (&objfile
->psymbol_obstack
,
1293 number_dependencies
* sizeof (struct partial_symtab
*));
1294 memcpy (pst
->dependencies
, dependency_list
,
1295 number_dependencies
* sizeof (struct partial_symtab
*));
1298 pst
->dependencies
= 0;
1300 for (i
= 0; i
< num_includes
; i
++)
1302 struct partial_symtab
*subpst
=
1303 allocate_psymtab (include_list
[i
], objfile
);
1305 subpst
->section_offsets
= pst
->section_offsets
;
1306 subpst
->read_symtab_private
=
1307 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1308 sizeof (struct symloc
));
1312 subpst
->texthigh
= 0;
1314 /* We could save slight bits of space by only making one of these,
1315 shared by the entire set of include files. FIXME-someday. */
1316 subpst
->dependencies
= (struct partial_symtab
**)
1317 obstack_alloc (&objfile
->psymbol_obstack
,
1318 sizeof (struct partial_symtab
*));
1319 subpst
->dependencies
[0] = pst
;
1320 subpst
->number_of_dependencies
= 1;
1322 subpst
->globals_offset
=
1323 subpst
->n_global_syms
=
1324 subpst
->statics_offset
=
1325 subpst
->n_static_syms
= 0;
1329 subpst
->read_symtab
= pst
->read_symtab
;
1332 sort_pst_symbols (pst
);
1334 /* If there is already a psymtab or symtab for a file of this name, remove it.
1335 (If there is a symtab, more drastic things also happen.)
1336 This happens in VxWorks. */
1337 free_named_symtabs (pst
->filename
);
1339 if (num_includes
== 0
1340 && number_dependencies
== 0
1341 && pst
->n_global_syms
== 0
1342 && pst
->n_static_syms
== 0)
1344 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1345 it is on the obstack, but we can forget to chain it on the list. */
1346 /* Empty psymtabs happen as a result of header files which don't have
1347 any symbols in them. There can be a lot of them. But this check
1348 is wrong, in that a psymtab with N_SLINE entries but nothing else
1349 is not empty, but we don't realize that. Fixing that without slowing
1350 things down might be tricky. */
1351 struct partial_symtab
*prev_pst
;
1353 /* First, snip it out of the psymtab chain */
1355 if (pst
->objfile
->psymtabs
== pst
)
1356 pst
->objfile
->psymtabs
= pst
->next
;
1358 for (prev_pst
= pst
->objfile
->psymtabs
; prev_pst
; prev_pst
= pst
->next
)
1359 if (prev_pst
->next
== pst
)
1360 prev_pst
->next
= pst
->next
;
1362 /* Next, put it on a free list for recycling */
1364 pst
->next
= pst
->objfile
->free_psymtabs
;
1365 pst
->objfile
->free_psymtabs
= pst
;
1367 /* Indicate that psymtab was thrown away. */
1368 pst
= (struct partial_symtab
*)NULL
;
1374 dbx_psymtab_to_symtab_1 (pst
)
1375 struct partial_symtab
*pst
;
1377 struct cleanup
*old_chain
;
1385 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1390 /* Read in all partial symtabs on which this one is dependent */
1391 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1392 if (!pst
->dependencies
[i
]->readin
)
1394 /* Inform about additional files that need to be read in. */
1397 fputs_filtered (" ", gdb_stdout
);
1399 fputs_filtered ("and ", gdb_stdout
);
1401 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1402 wrap_here (""); /* Flush output */
1403 gdb_flush (gdb_stdout
);
1405 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1408 if (LDSYMLEN(pst
)) /* Otherwise it's a dummy */
1410 /* Init stuff necessary for reading in symbols */
1413 old_chain
= make_cleanup (really_free_pendings
, 0);
1414 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1415 symbol_size
= SYMBOL_SIZE (pst
);
1417 /* Read in this file's symbols */
1418 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1419 read_ofile_symtab (pst
);
1420 sort_symtab_syms (pst
->symtab
);
1422 do_cleanups (old_chain
);
1428 /* Read in all of the symbols for a given psymtab for real.
1429 Be verbose about it if the user wants that. */
1432 dbx_psymtab_to_symtab (pst
)
1433 struct partial_symtab
*pst
;
1442 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1447 if (LDSYMLEN(pst
) || pst
->number_of_dependencies
)
1449 /* Print the message now, before reading the string table,
1450 to avoid disconcerting pauses. */
1453 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1454 gdb_flush (gdb_stdout
);
1457 sym_bfd
= pst
->objfile
->obfd
;
1459 next_symbol_text_func
= dbx_next_symbol_text
;
1461 dbx_psymtab_to_symtab_1 (pst
);
1463 /* Match with global symbols. This only needs to be done once,
1464 after all of the symtabs and dependencies have been read in. */
1465 scan_file_globals (pst
->objfile
);
1467 /* Finish up the debug error message. */
1469 printf_filtered ("done.\n");
1473 /* Read in a defined section of a specific object file's symbols. */
1476 read_ofile_symtab (pst
)
1477 struct partial_symtab
*pst
;
1479 register char *namestring
;
1480 register struct internal_nlist
*bufp
;
1482 unsigned max_symnum
;
1484 struct objfile
*objfile
;
1485 int sym_offset
; /* Offset to start of symbols to read */
1486 int sym_size
; /* Size of symbols to read */
1487 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1488 int text_size
; /* Size of text segment for symbols */
1489 struct section_offsets
*section_offsets
;
1491 objfile
= pst
->objfile
;
1492 sym_offset
= LDSYMOFF(pst
);
1493 sym_size
= LDSYMLEN(pst
);
1494 text_offset
= pst
->textlow
;
1495 text_size
= pst
->texthigh
- pst
->textlow
;
1496 section_offsets
= pst
->section_offsets
;
1498 current_objfile
= objfile
;
1499 subfile_stack
= NULL
;
1501 stringtab_global
= DBX_STRINGTAB (objfile
);
1502 last_source_file
= NULL
;
1504 abfd
= objfile
->obfd
;
1505 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1506 symbuf_end
= symbuf_idx
= 0;
1508 /* It is necessary to actually read one symbol *before* the start
1509 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1510 occurs before the N_SO symbol.
1512 Detecting this in read_dbx_symtab
1513 would slow down initial readin, so we look for it here instead. */
1514 if (!processing_acc_compilation
&& sym_offset
>= (int)symbol_size
)
1516 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1518 bufp
= &symbuf
[symbuf_idx
++];
1519 SWAP_SYMBOL (bufp
, abfd
);
1523 processing_gcc_compilation
= 0;
1524 if (bufp
->n_type
== N_TEXT
)
1526 const char *tempstring
= namestring
;
1528 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1529 processing_gcc_compilation
= 1;
1530 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1531 processing_gcc_compilation
= 2;
1532 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1534 if (STREQN (tempstring
, "__gnu_compiled", 14))
1535 processing_gcc_compilation
= 2;
1538 /* Try to select a C++ demangling based on the compilation unit
1541 if (processing_gcc_compilation
)
1543 if (AUTO_DEMANGLING
)
1545 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1551 /* The N_SO starting this symtab is the first symbol, so we
1552 better not check the symbol before it. I'm not this can
1553 happen, but it doesn't hurt to check for it. */
1554 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1555 processing_gcc_compilation
= 0;
1558 if (symbuf_idx
== symbuf_end
)
1560 bufp
= &symbuf
[symbuf_idx
];
1561 if (bufp
->n_type
!= (unsigned char)N_SO
)
1562 error("First symbol in segment of executable not a source symbol");
1564 max_symnum
= sym_size
/ symbol_size
;
1567 symnum
< max_symnum
;
1570 QUIT
; /* Allow this to be interruptable */
1571 if (symbuf_idx
== symbuf_end
)
1573 bufp
= &symbuf
[symbuf_idx
++];
1574 SWAP_SYMBOL (bufp
, abfd
);
1576 type
= bufp
->n_type
;
1580 if (type
& N_STAB
) {
1581 process_one_symbol (type
, bufp
->n_desc
, bufp
->n_value
,
1582 namestring
, section_offsets
, objfile
);
1584 /* We skip checking for a new .o or -l file; that should never
1585 happen in this routine. */
1586 else if (type
== N_TEXT
)
1588 /* I don't think this code will ever be executed, because
1589 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1590 the N_SO symbol which starts this source file.
1591 However, there is no reason not to accept
1592 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1594 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1595 processing_gcc_compilation
= 1;
1596 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1597 processing_gcc_compilation
= 2;
1599 if (AUTO_DEMANGLING
)
1601 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1604 else if (type
& N_EXT
|| type
== (unsigned char)N_TEXT
1605 || type
== (unsigned char)N_NBTEXT
1607 /* Global symbol: see if we came across a dbx defintion for
1608 a corresponding symbol. If so, store the value. Remove
1609 syms from the chain when their values are stored, but
1610 search the whole chain, as there may be several syms from
1611 different files with the same name. */
1612 /* This is probably not true. Since the files will be read
1613 in one at a time, each reference to a global symbol will
1614 be satisfied in each file as it appears. So we skip this
1620 current_objfile
= NULL
;
1622 /* In a Solaris elf file, this variable, which comes from the
1623 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1624 which comes from pst->textlow is correct. */
1625 if (last_source_start_addr
== 0)
1626 last_source_start_addr
= text_offset
;
1628 pst
->symtab
= end_symtab (text_offset
+ text_size
, 0, 0, objfile
,
1634 /* This handles a single symbol from the symbol-file, building symbols
1635 into a GDB symtab. It takes these arguments and an implicit argument.
1637 TYPE is the type field of the ".stab" symbol entry.
1638 DESC is the desc field of the ".stab" entry.
1639 VALU is the value field of the ".stab" entry.
1640 NAME is the symbol name, in our address space.
1641 SECTION_OFFSETS is a set of amounts by which the sections of this object
1642 file were relocated when it was loaded into memory.
1643 All symbols that refer
1644 to memory locations need to be offset by these amounts.
1645 OBJFILE is the object file from which we are reading symbols.
1646 It is used in end_symtab. */
1649 process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1653 struct section_offsets
*section_offsets
;
1654 struct objfile
*objfile
;
1656 #ifdef SUN_FIXED_LBRAC_BUG
1657 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1658 to correct the address of N_LBRAC's. If it is not defined, then
1659 we never need to correct the addresses. */
1661 /* This records the last pc address we've seen. We depend on there being
1662 an SLINE or FUN or SO before the first LBRAC, since the variable does
1663 not get reset in between reads of different symbol files. */
1664 static CORE_ADDR last_pc_address
;
1667 register struct context_stack
*new;
1668 /* This remembers the address of the start of a function. It is used
1669 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1670 relative to the current function's start address. On systems
1671 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1672 used to relocate these symbol types rather than SECTION_OFFSETS. */
1673 static CORE_ADDR function_start_offset
;
1675 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
1676 to the function start address. */
1677 int block_address_function_relative
;
1679 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1680 file. Used to detect the SunPRO solaris compiler. */
1681 static int n_opt_found
;
1683 /* The stab type used for the definition of the last function.
1684 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1685 static int function_stab_type
= 0;
1687 /* This is true for Solaris (and all other systems which put stabs
1688 in sections, hopefully, since it would be silly to do things
1689 differently from Solaris), and false for SunOS4 and other a.out
1691 block_address_function_relative
=
1692 ((0 == strncmp (bfd_get_target (objfile
->obfd
), "elf", 3))
1693 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "som", 3))
1694 || (0 == strncmp (bfd_get_target (objfile
->obfd
), "coff", 4)));
1696 if (!block_address_function_relative
)
1697 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1698 function start address, so just use the text offset. */
1699 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1701 /* Something is wrong if we see real data before
1702 seeing a source file name. */
1704 if (last_source_file
== NULL
&& type
!= (unsigned char)N_SO
)
1706 /* Ignore any symbols which appear before an N_SO symbol. Currently
1707 no one puts symbols there, but we should deal gracefully with the
1708 case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
1709 but this should not be an error (). */
1717 /* Relocate for dynamic loading */
1718 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1719 goto define_a_symbol
;
1722 /* This "symbol" just indicates the start of an inner lexical
1723 context within a function. */
1725 #if defined(BLOCK_ADDRESS_ABSOLUTE)
1726 /* Relocate for dynamic loading (?). */
1727 valu
+= function_start_offset
;
1729 if (block_address_function_relative
)
1730 /* Relocate for Sun ELF acc fn-relative syms. */
1731 valu
+= function_start_offset
;
1733 /* On most machines, the block addresses are relative to the
1734 N_SO, the linker did not relocate them (sigh). */
1735 valu
+= last_source_start_addr
;
1738 #ifdef SUN_FIXED_LBRAC_BUG
1739 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
) {
1740 /* Patch current LBRAC pc value to match last handy pc value */
1741 complain (&lbrac_complaint
);
1742 valu
= last_pc_address
;
1745 new = push_context (desc
, valu
);
1749 /* This "symbol" just indicates the end of an inner lexical
1750 context that was started with N_LBRAC. */
1752 #if defined(BLOCK_ADDRESS_ABSOLUTE)
1753 /* Relocate for dynamic loading (?). */
1754 valu
+= function_start_offset
;
1756 if (block_address_function_relative
)
1757 /* Relocate for Sun ELF acc fn-relative syms. */
1758 valu
+= function_start_offset
;
1760 /* On most machines, the block addresses are relative to the
1761 N_SO, the linker did not relocate them (sigh). */
1762 valu
+= last_source_start_addr
;
1765 new = pop_context();
1766 if (desc
!= new->depth
)
1767 complain (&lbrac_mismatch_complaint
, symnum
);
1769 /* Some compilers put the variable decls inside of an
1770 LBRAC/RBRAC block. This macro should be nonzero if this
1771 is true. DESC is N_DESC from the N_RBRAC symbol.
1772 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
1773 or the GCC2_COMPILED_SYMBOL. */
1774 #if !defined (VARIABLES_INSIDE_BLOCK)
1775 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
1778 /* Can only use new->locals as local symbols here if we're in
1779 gcc or on a machine that puts them before the lbrack. */
1780 if (!VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1781 local_symbols
= new->locals
;
1783 if (context_stack_depth
1784 > !VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1786 /* This is not the outermost LBRAC...RBRAC pair in the function,
1787 its local symbols preceded it, and are the ones just recovered
1788 from the context stack. Define the block for them (but don't
1789 bother if the block contains no symbols. Should we complain
1790 on blocks without symbols? I can't think of any useful purpose
1792 if (local_symbols
!= NULL
)
1794 /* Muzzle a compiler bug that makes end < start. (which
1795 compilers? Is this ever harmful?). */
1796 if (new->start_addr
> valu
)
1798 complain (&lbrac_rbrac_complaint
);
1799 new->start_addr
= valu
;
1801 /* Make a block for the local symbols within. */
1802 finish_block (0, &local_symbols
, new->old_blocks
,
1803 new->start_addr
, valu
, objfile
);
1808 /* This is the outermost LBRAC...RBRAC pair. There is no
1809 need to do anything; leave the symbols that preceded it
1810 to be attached to the function's own block. We need to
1811 indicate that we just moved outside of the function. */
1812 within_function
= 0;
1815 if (VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1816 /* Now pop locals of block just finished. */
1817 local_symbols
= new->locals
;
1822 /* This kind of symbol indicates the start of an object file. */
1823 /* Relocate for dynamic loading */
1824 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1828 /* This type of symbol indicates the start of data
1829 for one source file.
1830 Finish the symbol table of the previous source file
1831 (if any) and start accumulating a new symbol table. */
1832 /* Relocate for dynamic loading */
1833 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1837 #ifdef SUN_FIXED_LBRAC_BUG
1838 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
1841 #ifdef PCC_SOL_BROKEN
1842 /* pcc bug, occasionally puts out SO for SOL. */
1843 if (context_stack_depth
> 0)
1845 start_subfile (name
, NULL
);
1849 if (last_source_file
)
1851 /* Check if previous symbol was also an N_SO (with some
1852 sanity checks). If so, that one was actually the directory
1853 name, and the current one is the real file name.
1855 if (previous_stab_code
== (unsigned char) N_SO
)
1857 patch_subfile_names (current_subfile
, name
);
1858 break; /* Ignore repeated SOs */
1860 end_symtab (valu
, 0, 0, objfile
, SECT_OFF_TEXT
);
1864 start_symtab (name
, NULL
, valu
);
1869 /* This type of symbol indicates the start of data for
1870 a sub-source-file, one whose contents were copied or
1871 included in the compilation of the main source file
1872 (whose name was given in the N_SO symbol.) */
1873 /* Relocate for dynamic loading */
1874 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1875 start_subfile (name
, current_subfile
->dirname
);
1880 add_new_header_file (name
, valu
);
1881 start_subfile (name
, current_subfile
->dirname
);
1885 start_subfile (pop_subfile (), current_subfile
->dirname
);
1889 add_old_header_file (name
, valu
);
1893 /* This type of "symbol" really just records
1894 one line-number -- core-address correspondence.
1895 Enter it in the line list for this symbol table. */
1896 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
1897 valu
+= function_start_offset
;
1898 #ifdef SUN_FIXED_LBRAC_BUG
1899 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
1901 record_line (current_subfile
, desc
, valu
);
1905 common_block_start (name
, objfile
);
1909 common_block_end (objfile
);
1912 /* The following symbol types need to have the appropriate offset added
1913 to their value; then we process symbol definitions in the name. */
1915 case N_STSYM
: /* Static symbol in data seg */
1916 case N_LCSYM
: /* Static symbol in BSS seg */
1917 case N_ROSYM
: /* Static symbol in Read-only data seg */
1918 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
1919 Solaris2's stabs-in-elf makes *most* symbols relative
1920 but leaves a few absolute (at least for Solaris 2.1 and version
1921 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
1922 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
1923 .stab "foo:V...",N_STSYM is relative (section base subtracted).
1924 This leaves us no choice but to search for the 'S' or 'V'...
1925 (or pass the whole section_offsets stuff down ONE MORE function
1926 call level, which we really don't want to do). */
1929 p
= strchr (name
, ':');
1930 if (p
!= 0 && p
[1] == 'S')
1932 /* The linker relocated it. We don't want to add an
1933 elfstab_offset_sections-type offset, but we *do* want
1934 to add whatever solib.c passed to symbol_file_add as
1935 addr (this is known to affect SunOS4, and I suspect ELF
1936 too). Since elfstab_offset_sections currently does not
1937 muck with the text offset (there is no Ttext.text
1938 symbol), we can get addr from the text offset. If
1939 elfstab_offset_sections ever starts dealing with the
1940 text offset, and we still need to do this, we need to
1941 invent a SECT_OFF_ADDR_KLUDGE or something. */
1942 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1943 goto define_a_symbol
;
1945 /* Since it's not the kludge case, re-dispatch to the right handler. */
1947 case N_STSYM
: goto case_N_STSYM
;
1948 case N_LCSYM
: goto case_N_LCSYM
;
1949 case N_ROSYM
: goto case_N_ROSYM
;
1954 case_N_STSYM
: /* Static symbol in data seg */
1955 case N_DSLINE
: /* Source line number, data seg */
1956 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
1957 goto define_a_symbol
;
1959 case_N_LCSYM
: /* Static symbol in BSS seg */
1960 case N_BSLINE
: /* Source line number, bss seg */
1961 /* N_BROWS: overlaps with N_BSLINE */
1962 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
1963 goto define_a_symbol
;
1965 case_N_ROSYM
: /* Static symbol in Read-only data seg */
1966 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA
);
1967 goto define_a_symbol
;
1969 case N_ENTRY
: /* Alternate entry point */
1970 /* Relocate for dynamic loading */
1971 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1972 goto define_a_symbol
;
1974 /* The following symbol types we don't know how to process. Handle
1975 them in a "default" way, but complain to people who care. */
1977 case N_CATCH
: /* Exception handler catcher */
1978 case N_EHDECL
: /* Exception handler name */
1979 case N_PC
: /* Global symbol in Pascal */
1980 case N_M2C
: /* Modula-2 compilation unit */
1981 /* N_MOD2: overlaps with N_EHDECL */
1982 case N_SCOPE
: /* Modula-2 scope information */
1983 case N_ECOML
: /* End common (local name) */
1984 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
1989 complain (&unknown_symtype_complaint
, local_hex_string (type
));
1992 /* The following symbol types don't need the address field relocated,
1993 since it is either unused, or is absolute. */
1995 case N_GSYM
: /* Global variable */
1996 case N_NSYMS
: /* Number of symbols (ultrix) */
1997 case N_NOMAP
: /* No map? (ultrix) */
1998 case N_RSYM
: /* Register variable */
1999 case N_DEFD
: /* Modula-2 GNU module dependency */
2000 case N_SSYM
: /* Struct or union element */
2001 case N_LSYM
: /* Local symbol in stack */
2002 case N_PSYM
: /* Parameter variable */
2003 case N_LENG
: /* Length of preceding symbol type */
2007 char *colon_pos
= strchr (name
, ':');
2008 if (colon_pos
== NULL
)
2011 deftype
= colon_pos
[1];
2017 function_stab_type
= type
;
2019 #ifdef SUN_FIXED_LBRAC_BUG
2020 /* The Sun acc compiler, under SunOS4, puts out
2021 functions with N_GSYM or N_STSYM. The problem is
2022 that the address of the symbol is no good (for N_GSYM
2023 it doesn't even attept an address; for N_STSYM it
2024 puts out an address but then it gets relocated
2025 relative to the data segment, not the text segment).
2026 Currently we can't fix this up later as we do for
2027 some types of symbol in scan_file_globals.
2028 Fortunately we do have a way of finding the address -
2029 we know that the value in last_pc_address is either
2030 the one we want (if we're dealing with the first
2031 function in an object file), or somewhere in the
2032 previous function. This means that we can use the
2033 minimal symbol table to get the address. */
2035 /* On solaris up to 2.2, the N_FUN stab gets relocated.
2036 On Solaris 2.3, ld no longer relocates stabs (which
2037 is good), and the N_FUN's value is now always zero.
2038 The following code can't deal with this, because
2039 last_pc_address depends on getting the address from a
2040 N_SLINE or some such and in Solaris those are function
2041 relative. Best fix is probably to create a Ttext.text symbol
2042 and handle this like Ddata.data and so on. */
2044 if (type
== N_GSYM
|| type
== N_STSYM
)
2046 struct minimal_symbol
*m
;
2047 int l
= colon_pos
- name
;
2049 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2050 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
))
2051 /* last_pc_address was in this function */
2052 valu
= SYMBOL_VALUE (m
);
2053 else if (m
&& STREQN (SYMBOL_NAME (m
+1), name
, l
))
2054 /* last_pc_address was in last function */
2055 valu
= SYMBOL_VALUE (m
+1);
2057 /* Not found - use last_pc_address (for finish_block) */
2058 valu
= last_pc_address
;
2061 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2064 if (block_address_function_relative
)
2065 /* For Solaris 2.0 compilers, the block addresses and
2066 N_SLINE's are relative to the start of the
2067 function. On normal systems, and when using gcc on
2068 Solaris 2.0, these addresses are just absolute, or
2069 relative to the N_SO, depending on
2070 BLOCK_ADDRESS_ABSOLUTE. */
2071 function_start_offset
= valu
;
2073 within_function
= 1;
2074 if (context_stack_depth
> 0)
2076 new = pop_context ();
2077 /* Make a block for the local symbols within. */
2078 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2079 new->start_addr
, valu
, objfile
);
2081 /* Stack must be empty now. */
2082 if (context_stack_depth
!= 0)
2083 complain (&lbrac_unmatched_complaint
, symnum
);
2085 new = push_context (0, valu
);
2086 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2090 define_symbol (valu
, name
, desc
, type
, objfile
);
2096 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2097 for a bunch of other flags, too. Someday we may parse their
2098 flags; for now we ignore theirs and hope they'll ignore ours. */
2099 case N_OPT
: /* Solaris 2: Compiler options */
2102 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2104 processing_gcc_compilation
= 2;
2105 #if 1 /* Works, but is experimental. -fnf */
2106 if (AUTO_DEMANGLING
)
2108 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2117 /* The following symbol types can be ignored. */
2118 case N_OBJ
: /* Solaris 2: Object file dir and name */
2119 /* N_UNDF: Solaris 2: file separator mark */
2120 /* N_UNDF: -- we will never encounter it, since we only process one
2121 file's symbols at once. */
2122 case N_ENDM
: /* Solaris 2: End of module */
2123 case N_MAIN
: /* Name of main routine. */
2127 previous_stab_code
= type
;
2130 /* FIXME: The only difference between this and elfstab_build_psymtabs is
2131 the call to install_minimal_symbols for elf. If the differences are
2132 really that small, the code should be shared. */
2134 /* Scan and build partial symbols for an coff symbol file.
2135 The coff file has already been processed to get its minimal symbols.
2137 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2140 OBJFILE is the object file we are reading symbols from.
2141 ADDR is the address relative to which the symbols are (e.g.
2142 the base address of the text segment).
2143 MAINLINE is true if we are reading the main symbol
2144 table (as opposed to a shared lib or dynamically loaded file).
2145 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2147 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2148 .stabstr section exists.
2150 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2151 adjusted for coff details. */
2154 coffstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2155 staboffset
, stabsize
,
2156 stabstroffset
, stabstrsize
)
2157 struct objfile
*objfile
;
2158 struct section_offsets
*section_offsets
;
2160 file_ptr staboffset
;
2161 unsigned int stabsize
;
2162 file_ptr stabstroffset
;
2163 unsigned int stabstrsize
;
2166 bfd
*sym_bfd
= objfile
->obfd
;
2167 char *name
= bfd_get_filename (sym_bfd
);
2168 struct dbx_symfile_info
*info
;
2170 /* There is already a dbx_symfile_info allocated by our caller.
2171 It might even contain some info from the coff symtab to help us. */
2172 info
= (struct dbx_symfile_info
*) objfile
->sym_stab_info
;
2174 DBX_TEXT_SECT (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
2175 if (!DBX_TEXT_SECT (objfile
))
2176 error ("Can't find .text section in symbol file");
2178 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2179 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2180 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2181 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2182 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2184 if (stabstrsize
> bfd_get_size (sym_bfd
))
2185 error ("ridiculous string table size: %d bytes", stabstrsize
);
2186 DBX_STRINGTAB (objfile
) = (char *)
2187 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2189 /* Now read in the string table in one big gulp. */
2191 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2193 perror_with_name (name
);
2194 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2195 if (val
!= stabstrsize
)
2196 perror_with_name (name
);
2198 stabsread_new_init ();
2199 buildsym_new_init ();
2200 free_header_files ();
2201 init_header_files ();
2203 processing_acc_compilation
= 1;
2205 /* In a coff file, we've already installed the minimal symbols that came
2206 from the coff (non-stab) symbol table, so always act like an
2207 incremental load here. */
2208 dbx_symfile_read (objfile
, section_offsets
, 0);
2211 /* Scan and build partial symbols for an ELF symbol file.
2212 This ELF file has already been processed to get its minimal symbols,
2213 and any DWARF symbols that were in it.
2215 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2218 OBJFILE is the object file we are reading symbols from.
2219 ADDR is the address relative to which the symbols are (e.g.
2220 the base address of the text segment).
2221 MAINLINE is true if we are reading the main symbol
2222 table (as opposed to a shared lib or dynamically loaded file).
2223 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2225 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2226 .stabstr section exists.
2228 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2229 adjusted for elf details. */
2232 elfstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2233 staboffset
, stabsize
,
2234 stabstroffset
, stabstrsize
)
2235 struct objfile
*objfile
;
2236 struct section_offsets
*section_offsets
;
2238 file_ptr staboffset
;
2239 unsigned int stabsize
;
2240 file_ptr stabstroffset
;
2241 unsigned int stabstrsize
;
2244 bfd
*sym_bfd
= objfile
->obfd
;
2245 char *name
= bfd_get_filename (sym_bfd
);
2246 struct dbx_symfile_info
*info
;
2248 /* There is already a dbx_symfile_info allocated by our caller.
2249 It might even contain some info from the ELF symtab to help us. */
2250 info
= (struct dbx_symfile_info
*) objfile
->sym_stab_info
;
2252 DBX_TEXT_SECT (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
2253 if (!DBX_TEXT_SECT (objfile
))
2254 error ("Can't find .text section in symbol file");
2256 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2257 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2258 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2259 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2260 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2262 if (stabstrsize
> bfd_get_size (sym_bfd
))
2263 error ("ridiculous string table size: %d bytes", stabstrsize
);
2264 DBX_STRINGTAB (objfile
) = (char *)
2265 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2267 /* Now read in the string table in one big gulp. */
2269 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2271 perror_with_name (name
);
2272 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2273 if (val
!= stabstrsize
)
2274 perror_with_name (name
);
2276 stabsread_new_init ();
2277 buildsym_new_init ();
2278 free_header_files ();
2279 init_header_files ();
2280 install_minimal_symbols (objfile
);
2282 processing_acc_compilation
= 1;
2284 /* In an elf file, we've already installed the minimal symbols that came
2285 from the elf (non-stab) symbol table, so always act like an
2286 incremental load here. */
2287 dbx_symfile_read (objfile
, section_offsets
, 0);
2290 /* Scan and build partial symbols for a PA symbol file.
2291 This PA file has already been processed to get its minimal symbols.
2293 OBJFILE is the object file we are reading symbols from.
2294 ADDR is the address relative to which the symbols are (e.g.
2295 the base address of the text segment).
2296 MAINLINE is true if we are reading the main symbol
2297 table (as opposed to a shared lib or dynamically loaded file).
2302 pastab_build_psymtabs (objfile
, section_offsets
, mainline
)
2303 struct objfile
*objfile
;
2304 struct section_offsets
*section_offsets
;
2307 free_header_files ();
2308 init_header_files ();
2310 /* This is needed to debug objects assembled with gas2. */
2311 processing_acc_compilation
= 1;
2313 /* In a PA file, we've already installed the minimal symbols that came
2314 from the PA (non-stab) symbol table, so always act like an
2315 incremental load here. */
2317 dbx_symfile_read (objfile
, section_offsets
, mainline
);
2320 /* Parse the user's idea of an offset for dynamic linking, into our idea
2321 of how to represent it for fast symbol reading. */
2323 static struct section_offsets
*
2324 dbx_symfile_offsets (objfile
, addr
)
2325 struct objfile
*objfile
;
2328 struct section_offsets
*section_offsets
;
2331 objfile
->num_sections
= SECT_OFF_MAX
;
2332 section_offsets
= (struct section_offsets
*)
2333 obstack_alloc (&objfile
-> psymbol_obstack
,
2334 sizeof (struct section_offsets
)
2335 + sizeof (section_offsets
->offsets
) * (SECT_OFF_MAX
-1));
2337 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
2338 ANOFFSET (section_offsets
, i
) = addr
;
2340 return section_offsets
;
2343 static struct sym_fns aout_sym_fns
=
2345 bfd_target_aout_flavour
,
2346 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2347 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2348 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2349 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2350 dbx_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
2351 NULL
/* next: pointer to next struct sym_fns */
2355 _initialize_dbxread ()
2357 add_symtab_fns(&aout_sym_fns
);