1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2008, 2009.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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(__CYGNUSCLIB__)
39 #include <sys/types.h>
43 #include "gdb_obstack.h"
46 #include "breakpoint.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
55 #include "complaints.h"
57 #include "cp-support.h"
59 #include "gdb_assert.h"
60 #include "gdb_string.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
66 /* We put a pointer to this structure in the read_symtab_private field
71 /* Offset within the file symbol table of first local symbol for this
76 /* Length (in bytes) of the section of the symbol table devoted to
77 this file's symbols (actually, the section bracketed may contain
78 more than just this file's symbols). If ldsymlen is 0, the only
79 reason for this thing's existence is the dependency list. Nothing
80 else will happen when it is read in. */
84 /* The size of each symbol in the symbol file (in external form). */
88 /* Further information needed to locate the symbols if they are in
93 int file_string_offset
;
96 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
97 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
98 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
99 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
100 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
101 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
102 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
105 /* Remember what we deduced to be the source language of this psymtab. */
107 static enum language psymtab_language
= language_unknown
;
109 /* The BFD for this file -- implicit parameter to next_symbol_text. */
111 static bfd
*symfile_bfd
;
113 /* The size of each symbol in the symbol file (in external form).
114 This is set by dbx_symfile_read when building psymtabs, and by
115 dbx_psymtab_to_symtab when building symtabs. */
117 static unsigned symbol_size
;
119 /* This is the offset of the symbol table in the executable file. */
121 static unsigned symbol_table_offset
;
123 /* This is the offset of the string table in the executable file. */
125 static unsigned string_table_offset
;
127 /* For elf+stab executables, the n_strx field is not a simple index
128 into the string table. Instead, each .o file has a base offset in
129 the string table, and the associated symbols contain offsets from
130 this base. The following two variables contain the base offset for
131 the current and next .o files. */
133 static unsigned int file_string_table_offset
;
134 static unsigned int next_file_string_table_offset
;
136 /* .o and NLM files contain unrelocated addresses which are based at
137 0. When non-zero, this flag disables some of the special cases for
138 Solaris elf+stab text addresses at location 0. */
140 static int symfile_relocatable
= 0;
142 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
143 relative to the function start address. */
145 static int block_address_function_relative
= 0;
147 /* The lowest text address we have yet encountered. This is needed
148 because in an a.out file, there is no header field which tells us
149 what address the program is actually going to be loaded at, so we
150 need to make guesses based on the symbols (which *are* relocated to
151 reflect the address it will be loaded at). */
153 static CORE_ADDR lowest_text_address
;
155 /* Non-zero if there is any line number info in the objfile. Prevents
156 end_psymtab from discarding an otherwise empty psymtab. */
158 static int has_line_numbers
;
160 /* Complaints about the symbols we have encountered. */
163 unknown_symtype_complaint (const char *arg1
)
165 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
169 lbrac_mismatch_complaint (int arg1
)
171 complaint (&symfile_complaints
,
172 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
176 repeated_header_complaint (const char *arg1
, int arg2
)
178 complaint (&symfile_complaints
,
179 _("\"repeated\" header file %s not previously seen, at symtab \
184 /* find_text_range --- find start and end of loadable code sections
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
194 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
201 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
202 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
204 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
205 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
209 if (sec_start
< start
)
224 error (_("Can't find any code sections in symbol file"));
226 DBX_TEXT_ADDR (objfile
) = start
;
227 DBX_TEXT_SIZE (objfile
) = end
- start
;
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
237 struct header_file_location
239 char *name
; /* Name of header file */
240 int instance
; /* See above */
241 struct partial_symtab
*pst
; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
245 /* The actual list and controling variables */
246 static struct header_file_location
*bincl_list
, *next_bincl
;
247 static int bincls_allocated
;
249 /* Local function prototypes */
251 extern void _initialize_dbxread (void);
253 static void read_ofile_symtab (struct partial_symtab
*);
255 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
259 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
261 static void read_dbx_symtab (struct objfile
*);
263 static void free_bincl_list (struct objfile
*);
265 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
269 static void init_bincl_list (int, struct objfile
*);
271 static char *dbx_next_symbol_text (struct objfile
*);
273 static void fill_symbuf (bfd
*);
275 static void dbx_symfile_init (struct objfile
*);
277 static void dbx_new_init (struct objfile
*);
279 static void dbx_symfile_read (struct objfile
*, int);
281 static void dbx_symfile_finish (struct objfile
*);
283 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
285 static void add_new_header_file (char *, int);
287 static void add_old_header_file (char *, int);
289 static void add_this_object_header_file (int);
291 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
293 struct partial_symbol
**,
294 struct partial_symbol
**);
296 /* Free up old header file tables */
299 free_header_files (void)
301 if (this_object_header_files
)
303 xfree (this_object_header_files
);
304 this_object_header_files
= NULL
;
306 n_allocated_this_object_header_files
= 0;
309 /* Allocate new header file tables */
312 init_header_files (void)
314 n_allocated_this_object_header_files
= 10;
315 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
322 add_this_object_header_file (int i
)
324 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
326 n_allocated_this_object_header_files
*= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files
,
329 n_allocated_this_object_header_files
* sizeof (int));
332 this_object_header_files
[n_this_object_header_files
++] = i
;
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
341 add_old_header_file (char *name
, int instance
)
343 struct header_file
*p
= HEADER_FILES (current_objfile
);
346 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
347 if (strcmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
349 add_this_object_header_file (i
);
352 repeated_header_complaint (name
, symnum
);
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
367 add_new_header_file (char *name
, int instance
)
370 struct header_file
*hfile
;
372 /* Make sure there is room for one more header file. */
374 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
376 if (N_HEADER_FILES (current_objfile
) == i
)
380 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
381 HEADER_FILES (current_objfile
) = (struct header_file
*)
382 xmalloc (10 * sizeof (struct header_file
));
387 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
388 HEADER_FILES (current_objfile
) = (struct header_file
*)
389 xrealloc ((char *) HEADER_FILES (current_objfile
),
390 (i
* sizeof (struct header_file
)));
394 /* Create an entry for this header file. */
396 i
= N_HEADER_FILES (current_objfile
)++;
397 hfile
= HEADER_FILES (current_objfile
) + i
;
398 hfile
->name
= xstrdup (name
);
399 hfile
->instance
= instance
;
402 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
403 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
405 add_this_object_header_file (i
);
409 static struct type
**
410 explicit_lookup_type (int real_filenum
, int index
)
412 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
414 if (index
>= f
->length
)
417 f
->vector
= (struct type
**)
418 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
419 memset (&f
->vector
[f
->length
/ 2],
420 '\0', f
->length
* sizeof (struct type
*) / 2);
422 return &f
->vector
[index
];
427 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
428 struct objfile
*objfile
)
430 enum minimal_symbol_type ms_type
;
432 asection
*bfd_section
;
438 section
= SECT_OFF_TEXT (objfile
);
439 bfd_section
= DBX_TEXT_SECTION (objfile
);
443 section
= SECT_OFF_DATA (objfile
);
444 bfd_section
= DBX_DATA_SECTION (objfile
);
448 section
= SECT_OFF_BSS (objfile
);
449 bfd_section
= DBX_BSS_SECTION (objfile
);
459 section
= SECT_OFF_DATA (objfile
);
460 bfd_section
= DBX_DATA_SECTION (objfile
);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type
= mst_file_data
;
467 section
= SECT_OFF_DATA (objfile
);
468 bfd_section
= DBX_DATA_SECTION (objfile
);
475 ms_type
= mst_file_text
;
476 section
= SECT_OFF_TEXT (objfile
);
477 bfd_section
= DBX_TEXT_SECTION (objfile
);
480 ms_type
= mst_file_data
;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
489 /* Same with virtual function tables, both global and static. */
491 char *tempstring
= name
;
492 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
494 if (is_vtable_name (tempstring
))
497 section
= SECT_OFF_DATA (objfile
);
498 bfd_section
= DBX_DATA_SECTION (objfile
);
501 ms_type
= mst_file_bss
;
502 section
= SECT_OFF_BSS (objfile
);
503 bfd_section
= DBX_BSS_SECTION (objfile
);
506 ms_type
= mst_unknown
;
512 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
513 && address
< lowest_text_address
)
514 lowest_text_address
= address
;
516 prim_record_minimal_symbol_and_info
517 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
529 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
533 struct cleanup
*back_to
;
535 sym_bfd
= objfile
->obfd
;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative
=
548 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
555 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
557 perror_with_name (objfile
->name
);
559 /* Size the symbol table. */
560 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
561 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
563 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
564 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
566 free_pending_blocks ();
567 back_to
= make_cleanup (really_free_pendings
, 0);
569 init_minimal_symbol_collection ();
570 make_cleanup_discard_minimal_symbols ();
572 /* Read stabs data from executable file and define symbols. */
574 read_dbx_symtab (objfile
);
576 /* Add the dynamic symbols. */
578 read_dbx_dynamic_symtab (objfile
);
580 /* Install any minimal symbols that have been collected as the current
581 minimal symbols for this objfile. */
583 install_minimal_symbols (objfile
);
585 do_cleanups (back_to
);
588 /* Initialize anything that needs initializing when a completely new
589 symbol file is specified (not just adding some symbols from another
590 file, e.g. a shared library). */
593 dbx_new_init (struct objfile
*ignore
)
595 stabsread_new_init ();
596 buildsym_new_init ();
597 init_header_files ();
601 /* dbx_symfile_init ()
602 is the dbx-specific initialization routine for reading symbols.
603 It is passed a struct objfile which contains, among other things,
604 the BFD for the file whose symbols are being read, and a slot for a pointer
605 to "private data" which we fill with goodies.
607 We read the string table into malloc'd space and stash a pointer to it.
609 Since BFD doesn't know how to read debug symbols in a format-independent
610 way (and may never do so...), we have to do it ourselves. We will never
611 be called unless this is an a.out (or very similar) file.
612 FIXME, there should be a cleaner peephole into the BFD environment here. */
614 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
617 dbx_symfile_init (struct objfile
*objfile
)
620 bfd
*sym_bfd
= objfile
->obfd
;
621 char *name
= bfd_get_filename (sym_bfd
);
623 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
625 /* Allocate struct to keep track of the symfile */
626 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
627 xmalloc (sizeof (struct dbx_symfile_info
));
628 memset (objfile
->deprecated_sym_stab_info
, 0,
629 sizeof (struct dbx_symfile_info
));
631 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
632 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
633 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
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 objfile_obstack.
654 When we blow away the objfile the string table goes away as well.
655 Note that gdb used to use the results of attempting to malloc the
656 string table, based on the size it read, as a form of sanity check
657 for botched byte swapping, on the theory that a byte swapped string
658 table size would be so totally bogus that the malloc would fail. Now
659 that we put in on the objfile_obstack, we can't do this since gdb gets
660 a fatal error (out of virtual memory) if the size is bogus. We can
661 however at least check to see if the size is less than the size of
662 the size field itself, or larger than the size of the entire file.
663 Note that all valid string tables have a size greater than zero, since
664 the bytes used to hold the size are included in the count. */
666 if (STRING_TABLE_OFFSET
== 0)
668 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
669 will never be zero, even when there is no string table. This
670 would appear to be a bug in bfd. */
671 DBX_STRINGTAB_SIZE (objfile
) = 0;
672 DBX_STRINGTAB (objfile
) = NULL
;
676 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
678 perror_with_name (name
);
680 memset (size_temp
, 0, sizeof (size_temp
));
681 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
684 perror_with_name (name
);
688 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
689 EOF if there is no string table, and attempting to read the size
690 from EOF will read zero bytes. */
691 DBX_STRINGTAB_SIZE (objfile
) = 0;
692 DBX_STRINGTAB (objfile
) = NULL
;
696 /* Read some data that would appear to be the string table size.
697 If there really is a string table, then it is probably the right
698 size. Byteswap if necessary and validate the size. Note that
699 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
700 random data that happened to be at STRING_TABLE_OFFSET, because
701 bfd can't tell us there is no string table, the sanity checks may
702 or may not catch this. */
703 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
705 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
706 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
707 error (_("ridiculous string table size (%d bytes)."),
708 DBX_STRINGTAB_SIZE (objfile
));
710 DBX_STRINGTAB (objfile
) =
711 (char *) obstack_alloc (&objfile
->objfile_obstack
,
712 DBX_STRINGTAB_SIZE (objfile
));
713 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
715 /* Now read in the string table in one big gulp. */
717 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
719 perror_with_name (name
);
720 val
= bfd_bread (DBX_STRINGTAB (objfile
),
721 DBX_STRINGTAB_SIZE (objfile
),
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 (struct objfile
*objfile
)
737 if (objfile
->deprecated_sym_stab_info
!= NULL
)
739 if (HEADER_FILES (objfile
) != NULL
)
741 int i
= N_HEADER_FILES (objfile
);
742 struct header_file
*hfiles
= HEADER_FILES (objfile
);
746 xfree (hfiles
[i
].name
);
747 xfree (hfiles
[i
].vector
);
751 xfree (objfile
->deprecated_sym_stab_info
);
753 free_header_files ();
757 /* Buffer for reading the symbol table entries. */
758 static struct external_nlist symbuf
[4096];
759 static int symbuf_idx
;
760 static int symbuf_end
;
762 /* Name of last function encountered. Used in Solaris to approximate
763 object file boundaries. */
764 static char *last_function_name
;
766 /* The address in memory of the string table of the object file we are
767 reading (which might not be the "main" object file, but might be a
768 shared library or some other dynamically loaded thing). This is
769 set by read_dbx_symtab when building psymtabs, and by
770 read_ofile_symtab when building symtabs, and is used only by
771 next_symbol_text. FIXME: If that is true, we don't need it when
772 building psymtabs, right? */
773 static char *stringtab_global
;
775 /* These variables are used to control fill_symbuf when the stabs
776 symbols are not contiguous (as may be the case when a COFF file is
777 linked using --split-by-reloc). */
778 static struct stab_section_list
*symbuf_sections
;
779 static unsigned int symbuf_left
;
780 static unsigned int symbuf_read
;
782 /* This variable stores a global stabs buffer, if we read stabs into
783 memory in one chunk in order to process relocations. */
784 static bfd_byte
*stabs_data
;
786 /* Refill the symbol table input buffer
787 and set the variables that control fetching entries from it.
788 Reports an error if no data available.
789 This function can read past the end of the symbol table
790 (into the string table) but this does no harm. */
793 fill_symbuf (bfd
*sym_bfd
)
800 nbytes
= sizeof (symbuf
);
801 if (nbytes
> symbuf_left
)
802 nbytes
= symbuf_left
;
803 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
805 else if (symbuf_sections
== NULL
)
807 count
= sizeof (symbuf
);
808 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
812 if (symbuf_left
<= 0)
814 file_ptr filepos
= symbuf_sections
->section
->filepos
;
815 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
816 perror_with_name (bfd_get_filename (sym_bfd
));
817 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
818 symbol_table_offset
= filepos
- symbuf_read
;
819 symbuf_sections
= symbuf_sections
->next
;
823 if (count
> sizeof (symbuf
))
824 count
= sizeof (symbuf
);
825 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
829 perror_with_name (bfd_get_filename (sym_bfd
));
830 else if (nbytes
== 0)
831 error (_("Premature end of file reading symbol table"));
832 symbuf_end
= nbytes
/ symbol_size
;
834 symbuf_left
-= nbytes
;
835 symbuf_read
+= nbytes
;
839 stabs_seek (int sym_offset
)
843 symbuf_read
+= sym_offset
;
844 symbuf_left
-= sym_offset
;
847 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
850 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
852 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
853 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
854 (intern).n_other = 0; \
855 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
856 if (bfd_get_sign_extend_vma (abfd)) \
857 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
859 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
862 /* Invariant: The symbol pointed to by symbuf_idx is the first one
863 that hasn't been swapped. Swap the symbol at the same time
864 that symbuf_idx is incremented. */
866 /* dbx allows the text of a symbol name to be continued into the
867 next symbol name! When such a continuation is encountered
868 (a \ at the end of the text of a name)
869 call this function to get the continuation. */
872 dbx_next_symbol_text (struct objfile
*objfile
)
874 struct internal_nlist nlist
;
876 if (symbuf_idx
== symbuf_end
)
877 fill_symbuf (symfile_bfd
);
880 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
881 OBJSTAT (objfile
, n_stabs
++);
885 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
888 /* Initialize the list of bincls to contain none and have some
892 init_bincl_list (int number
, struct objfile
*objfile
)
894 bincls_allocated
= number
;
895 next_bincl
= bincl_list
= (struct header_file_location
*)
896 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
899 /* Add a bincl to the list. */
902 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
904 if (next_bincl
>= bincl_list
+ bincls_allocated
)
906 int offset
= next_bincl
- bincl_list
;
907 bincls_allocated
*= 2;
908 bincl_list
= (struct header_file_location
*)
909 xrealloc ((char *) bincl_list
,
910 bincls_allocated
* sizeof (struct header_file_location
));
911 next_bincl
= bincl_list
+ offset
;
913 next_bincl
->pst
= pst
;
914 next_bincl
->instance
= instance
;
915 next_bincl
++->name
= name
;
918 /* Given a name, value pair, find the corresponding
919 bincl in the list. Return the partial symtab associated
920 with that header_file_location. */
922 static struct partial_symtab
*
923 find_corresponding_bincl_psymtab (char *name
, int instance
)
925 struct header_file_location
*bincl
;
927 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
928 if (bincl
->instance
== instance
929 && strcmp (name
, bincl
->name
) == 0)
932 repeated_header_complaint (name
, symnum
);
933 return (struct partial_symtab
*) 0;
936 /* Free the storage allocated for the bincl list. */
939 free_bincl_list (struct objfile
*objfile
)
942 bincls_allocated
= 0;
946 do_free_bincl_list_cleanup (void *objfile
)
948 free_bincl_list (objfile
);
951 static struct cleanup
*
952 make_cleanup_free_bincl_list (struct objfile
*objfile
)
954 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
957 /* Set namestring based on nlist. If the string table index is invalid,
958 give a fake name, and print a single error message per symbol file read,
959 rather than abort the symbol reading or flood the user with messages. */
962 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
966 if (nlist
->n_strx
+ file_string_table_offset
967 >= DBX_STRINGTAB_SIZE (objfile
)
968 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
970 complaint (&symfile_complaints
, _("bad string table offset in symbol %d"),
972 namestring
= "<bad string table offset>";
975 namestring
= (nlist
->n_strx
+ file_string_table_offset
976 + DBX_STRINGTAB (objfile
));
980 /* Scan a SunOs dynamic symbol table for symbols of interest and
981 add them to the minimal symbol table. */
984 read_dbx_dynamic_symtab (struct objfile
*objfile
)
986 bfd
*abfd
= objfile
->obfd
;
987 struct cleanup
*back_to
;
1000 /* Check that the symbol file has dynamic symbols that we know about.
1001 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1002 on a sun4 host (and vice versa) and bfd is not configured
1003 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1004 so we ignore the dynamic symbols in this case. */
1005 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1006 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1007 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1010 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1011 if (dynsym_size
< 0)
1014 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1015 back_to
= make_cleanup (xfree
, dynsyms
);
1017 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1018 if (dynsym_count
< 0)
1020 do_cleanups (back_to
);
1024 /* Enter dynamic symbols into the minimal symbol table
1025 if this is a stripped executable. */
1026 if (bfd_get_symcount (abfd
) <= 0)
1029 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1031 asymbol
*sym
= *symptr
;
1035 sec
= bfd_get_section (sym
);
1037 /* BFD symbols are section relative. */
1038 sym_value
= sym
->value
+ sec
->vma
;
1040 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1042 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1043 SECT_OFF_TEXT (objfile
));
1046 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1048 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1049 SECT_OFF_DATA (objfile
));
1052 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1054 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1055 SECT_OFF_BSS (objfile
));
1061 if (sym
->flags
& BSF_GLOBAL
)
1064 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1069 /* Symbols from shared libraries have a dynamic relocation entry
1070 that points to the associated slot in the procedure linkage table.
1071 We make a mininal symbol table entry with type mst_solib_trampoline
1072 at the address in the procedure linkage table. */
1073 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1074 if (dynrel_size
< 0)
1076 do_cleanups (back_to
);
1080 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1081 make_cleanup (xfree
, dynrels
);
1083 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1084 if (dynrel_count
< 0)
1086 do_cleanups (back_to
);
1090 for (counter
= 0, relptr
= dynrels
;
1091 counter
< dynrel_count
;
1092 counter
++, relptr
++)
1094 arelent
*rel
= *relptr
;
1096 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1097 SECT_OFF_DATA (objfile
));
1099 switch (bfd_get_arch (abfd
))
1101 case bfd_arch_sparc
:
1102 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1106 /* `16' is the type BFD produces for a jump table relocation. */
1107 if (rel
->howto
->type
!= 16)
1110 /* Adjust address in the jump table to point to
1111 the start of the bsr instruction. */
1118 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1119 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1123 do_cleanups (back_to
);
1127 find_stab_function_addr (char *namestring
, char *filename
,
1128 struct objfile
*objfile
)
1130 struct minimal_symbol
*msym
;
1134 p
= strchr (namestring
, ':');
1139 strncpy (p
, namestring
, n
);
1142 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1145 /* Sun Fortran appends an underscore to the minimal symbol name,
1146 try again with an appended underscore if the minimal symbol
1150 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1153 if (msym
== NULL
&& filename
!= NULL
)
1155 /* Try again without the filename. */
1157 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1159 if (msym
== NULL
&& filename
!= NULL
)
1161 /* And try again for Sun Fortran, but without the filename. */
1164 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1167 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1171 function_outside_compilation_unit_complaint (const char *arg1
)
1173 complaint (&symfile_complaints
,
1174 _("function `%s' appears to be defined outside of all compilation \
1179 /* Setup partial_symtab's describing each source file for which
1180 debugging information is available. */
1183 read_dbx_symtab (struct objfile
*objfile
)
1185 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1186 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1187 struct internal_nlist nlist
;
1188 CORE_ADDR text_addr
;
1195 int past_first_source_file
= 0;
1196 CORE_ADDR last_o_file_start
= 0;
1197 CORE_ADDR last_function_start
= 0;
1198 struct cleanup
*back_to
;
1200 int textlow_not_set
;
1201 int data_sect_index
;
1203 /* Current partial symtab */
1204 struct partial_symtab
*pst
;
1206 /* List of current psymtab's include files */
1207 char **psymtab_include_list
;
1208 int includes_allocated
;
1211 /* Index within current psymtab dependency list */
1212 struct partial_symtab
**dependency_list
;
1213 int dependencies_used
, dependencies_allocated
;
1215 text_addr
= DBX_TEXT_ADDR (objfile
);
1216 text_size
= DBX_TEXT_SIZE (objfile
);
1218 /* FIXME. We probably want to change stringtab_global rather than add this
1219 while processing every symbol entry. FIXME. */
1220 file_string_table_offset
= 0;
1221 next_file_string_table_offset
= 0;
1223 stringtab_global
= DBX_STRINGTAB (objfile
);
1225 pst
= (struct partial_symtab
*) 0;
1227 includes_allocated
= 30;
1229 psymtab_include_list
= (char **) alloca (includes_allocated
*
1232 dependencies_allocated
= 30;
1233 dependencies_used
= 0;
1235 (struct partial_symtab
**) alloca (dependencies_allocated
*
1236 sizeof (struct partial_symtab
*));
1238 /* Init bincl list */
1239 init_bincl_list (20, objfile
);
1240 back_to
= make_cleanup_free_bincl_list (objfile
);
1242 last_source_file
= NULL
;
1244 lowest_text_address
= (CORE_ADDR
) -1;
1246 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1247 abfd
= objfile
->obfd
;
1248 symbuf_end
= symbuf_idx
= 0;
1249 next_symbol_text_func
= dbx_next_symbol_text
;
1250 textlow_not_set
= 1;
1251 has_line_numbers
= 0;
1253 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1254 to global and static variables. The stab for a global or static
1255 variable doesn't give us any indication of which section it's in,
1256 so we can't tell immediately which offset in
1257 objfile->section_offsets we should apply to the variable's
1260 We could certainly find out which section contains the variable
1261 by looking up the variable's unrelocated address with
1262 find_pc_section, but that would be expensive; this is the
1263 function that constructs the partial symbol tables by examining
1264 every symbol in the entire executable, and it's
1265 performance-critical. So that expense would not be welcome. I'm
1266 not sure what to do about this at the moment.
1268 What we have done for years is to simply assume that the .data
1269 section's offset is appropriate for all global and static
1270 variables. Recently, this was expanded to fall back to the .bss
1271 section's offset if there is no .data section, and then to the
1272 .rodata section's offset. */
1273 data_sect_index
= objfile
->sect_index_data
;
1274 if (data_sect_index
== -1)
1275 data_sect_index
= SECT_OFF_BSS (objfile
);
1276 if (data_sect_index
== -1)
1277 data_sect_index
= SECT_OFF_RODATA (objfile
);
1279 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1280 for the file to have no .data, no .bss, and no .text at all, if
1281 it also has no global or static variables. If it does, we will
1282 get an internal error from an ANOFFSET macro below when we try to
1283 use data_sect_index. */
1285 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1287 /* Get the symbol for this run and pull out some info */
1288 QUIT
; /* allow this to be interruptable */
1289 if (symbuf_idx
== symbuf_end
)
1291 bufp
= &symbuf
[symbuf_idx
++];
1294 * Special case to speed up readin.
1296 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1298 has_line_numbers
= 1;
1302 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1303 OBJSTAT (objfile
, n_stabs
++);
1305 /* Ok. There is a lot of code duplicated in the rest of this
1306 switch statement (for efficiency reasons). Since I don't
1307 like duplicating code, I will do my penance here, and
1308 describe the code which is duplicated:
1310 *) The assignment to namestring.
1311 *) The call to strchr.
1312 *) The addition of a partial symbol the the two partial
1313 symbol lists. This last is a large section of code, so
1314 I've imbedded it in the following macro.
1317 switch (nlist
.n_type
)
1320 * Standard, external, non-debugger, symbols
1323 case N_TEXT
| N_EXT
:
1324 case N_NBTEXT
| N_EXT
:
1325 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1326 SECT_OFF_TEXT (objfile
));
1329 case N_DATA
| N_EXT
:
1330 case N_NBDATA
| N_EXT
:
1331 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1332 SECT_OFF_DATA (objfile
));
1337 case N_NBBSS
| N_EXT
:
1338 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1339 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1340 SECT_OFF_BSS (objfile
));
1345 namestring
= set_namestring (objfile
, &nlist
);
1348 record_minimal_symbol (namestring
, nlist
.n_value
,
1349 nlist
.n_type
, objfile
); /* Always */
1352 /* Standard, local, non-debugger, symbols */
1356 /* We need to be able to deal with both N_FN or N_TEXT,
1357 because we have no way of knowing whether the sys-supplied ld
1358 or GNU ld was used to make the executable. Sequents throw
1359 in another wrinkle -- they renumbered N_FN. */
1364 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1365 SECT_OFF_TEXT (objfile
));
1366 namestring
= set_namestring (objfile
, &nlist
);
1368 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1369 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1370 && namestring
[nsl
- 2] == '.'))
1372 if (past_first_source_file
&& pst
1373 /* The gould NP1 uses low values for .o and -l symbols
1374 which are not the address. */
1375 && nlist
.n_value
>= pst
->textlow
)
1377 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1378 symnum
* symbol_size
,
1379 nlist
.n_value
> pst
->texthigh
1380 ? nlist
.n_value
: pst
->texthigh
,
1381 dependency_list
, dependencies_used
,
1383 pst
= (struct partial_symtab
*) 0;
1385 dependencies_used
= 0;
1386 has_line_numbers
= 0;
1389 past_first_source_file
= 1;
1390 last_o_file_start
= nlist
.n_value
;
1397 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1398 SECT_OFF_DATA (objfile
));
1401 case N_UNDF
| N_EXT
:
1402 if (nlist
.n_value
!= 0)
1404 /* This is a "Fortran COMMON" symbol. See if the target
1405 environment knows where it has been relocated to. */
1409 namestring
= set_namestring (objfile
, &nlist
);
1410 if (target_lookup_symbol (namestring
, &reladdr
))
1412 continue; /* Error in lookup; ignore symbol for now. */
1414 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1415 nlist
.n_value
= reladdr
;
1416 goto bss_ext_symbol
;
1418 continue; /* Just undefined, not COMMON */
1421 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1423 /* Deal with relative offsets in the string table
1424 used in ELF+STAB under Solaris. If we want to use the
1425 n_strx field, which contains the name of the file,
1426 we must adjust file_string_table_offset *before* calling
1427 set_namestring(). */
1428 past_first_source_file
= 1;
1429 file_string_table_offset
= next_file_string_table_offset
;
1430 next_file_string_table_offset
=
1431 file_string_table_offset
+ nlist
.n_value
;
1432 if (next_file_string_table_offset
< file_string_table_offset
)
1433 error (_("string table offset backs up at %d"), symnum
);
1434 /* FIXME -- replace error() with complaint. */
1439 /* Lots of symbol types we can just ignore. */
1446 /* Keep going . . . */
1449 * Special symbol types for GNU
1452 case N_INDR
| N_EXT
:
1454 case N_SETA
| N_EXT
:
1456 case N_SETT
| N_EXT
:
1458 case N_SETD
| N_EXT
:
1460 case N_SETB
| N_EXT
:
1471 static int prev_so_symnum
= -10;
1472 static int first_so_symnum
;
1474 static char *dirname_nso
;
1475 int prev_textlow_not_set
;
1477 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1478 SECT_OFF_TEXT (objfile
));
1480 prev_textlow_not_set
= textlow_not_set
;
1482 /* A zero value is probably an indication for the SunPRO 3.0
1483 compiler. end_psymtab explicitly tests for zero, so
1484 don't relocate it. */
1486 if (nlist
.n_value
== 0
1487 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1489 textlow_not_set
= 1;
1493 textlow_not_set
= 0;
1495 past_first_source_file
= 1;
1497 if (prev_so_symnum
!= symnum
- 1)
1498 { /* Here if prev stab wasn't N_SO */
1499 first_so_symnum
= symnum
;
1503 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1504 symnum
* symbol_size
,
1505 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1506 dependency_list
, dependencies_used
,
1507 prev_textlow_not_set
);
1508 pst
= (struct partial_symtab
*) 0;
1510 dependencies_used
= 0;
1511 has_line_numbers
= 0;
1515 prev_so_symnum
= symnum
;
1517 /* End the current partial symtab and start a new one */
1519 namestring
= set_namestring (objfile
, &nlist
);
1521 /* Null name means end of .o file. Don't start a new one. */
1522 if (*namestring
== '\000')
1525 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1526 The first one is a directory name; the second the file name.
1527 If pst exists, is empty, and has a filename ending in '/',
1528 we assume the previous N_SO was a directory name. */
1530 p
= strrchr (namestring
, '/');
1531 if (p
&& *(p
+ 1) == '\000')
1533 /* Save the directory name SOs locally, then save it into
1534 the psymtab when it's created below. */
1535 dirname_nso
= namestring
;
1539 /* Some other compilers (C++ ones in particular) emit useless
1540 SOs for non-existant .c files. We ignore all subsequent SOs
1541 that immediately follow the first. */
1545 pst
= start_psymtab (objfile
,
1547 first_so_symnum
* symbol_size
,
1548 objfile
->global_psymbols
.next
,
1549 objfile
->static_psymbols
.next
);
1550 pst
->dirname
= dirname_nso
;
1558 enum language tmp_language
;
1559 /* Add this bincl to the bincl_list for future EXCLs. No
1560 need to save the string; it'll be around until
1561 read_dbx_symtab function returns */
1563 namestring
= set_namestring (objfile
, &nlist
);
1564 tmp_language
= deduce_language_from_filename (namestring
);
1566 /* Only change the psymtab's language if we've learned
1567 something useful (eg. tmp_language is not language_unknown).
1568 In addition, to match what start_subfile does, never change
1570 if (tmp_language
!= language_unknown
1571 && (tmp_language
!= language_c
1572 || psymtab_language
!= language_cplus
))
1573 psymtab_language
= tmp_language
;
1577 /* FIXME: we should not get here without a PST to work on.
1578 Attempt to recover. */
1579 complaint (&symfile_complaints
,
1580 _("N_BINCL %s not in entries for any file, at symtab \
1582 namestring
, symnum
);
1585 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1587 /* Mark down an include file in the current psymtab */
1589 goto record_include_file
;
1594 enum language tmp_language
;
1595 /* Mark down an include file in the current psymtab */
1597 namestring
= set_namestring (objfile
, &nlist
);
1598 tmp_language
= deduce_language_from_filename (namestring
);
1600 /* Only change the psymtab's language if we've learned
1601 something useful (eg. tmp_language is not language_unknown).
1602 In addition, to match what start_subfile does, never change
1604 if (tmp_language
!= language_unknown
1605 && (tmp_language
!= language_c
1606 || psymtab_language
!= language_cplus
))
1607 psymtab_language
= tmp_language
;
1609 /* In C++, one may expect the same filename to come round many
1610 times, when code is coming alternately from the main file
1611 and from inline functions in other files. So I check to see
1612 if this is a file we've seen before -- either the main
1613 source file, or a previously included file.
1615 This seems to be a lot of time to be spending on N_SOL, but
1616 things like "break c-exp.y:435" need to work (I
1617 suppose the psymtab_include_list could be hashed or put
1618 in a binary tree, if profiling shows this is a major hog). */
1619 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1623 for (i
= 0; i
< includes_used
; i
++)
1624 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1633 record_include_file
:
1635 psymtab_include_list
[includes_used
++] = namestring
;
1636 if (includes_used
>= includes_allocated
)
1638 char **orig
= psymtab_include_list
;
1640 psymtab_include_list
= (char **)
1641 alloca ((includes_allocated
*= 2) * sizeof (char *));
1642 memcpy (psymtab_include_list
, orig
,
1643 includes_used
* sizeof (char *));
1647 case N_LSYM
: /* Typedef or automatic variable. */
1648 case N_STSYM
: /* Data seg var -- static */
1649 case N_LCSYM
: /* BSS " */
1650 case N_ROSYM
: /* Read-only data seg var -- static. */
1651 case N_NBSTS
: /* Gould nobase. */
1652 case N_NBLCS
: /* symbols. */
1654 case N_GSYM
: /* Global (extern) variable; can be
1655 data or bss (sigh FIXME). */
1657 /* Following may probably be ignored; I'll leave them here
1658 for now (until I do Pascal and Modula 2 extensions). */
1660 case N_PC
: /* I may or may not need this; I
1662 case N_M2C
: /* I suspect that I can ignore this here. */
1663 case N_SCOPE
: /* Same. */
1667 namestring
= set_namestring (objfile
, &nlist
);
1669 /* See if this is an end of function stab. */
1670 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1674 /* It's value is the size (in bytes) of the function for
1675 function relative stabs, or the address of the function's
1676 end for old style stabs. */
1677 valu
= nlist
.n_value
+ last_function_start
;
1678 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1679 pst
->texthigh
= valu
;
1683 p
= (char *) strchr (namestring
, ':');
1685 continue; /* Not a debugging symbol. */
1688 sym_name
= NULL
; /* pacify "gcc -Werror" */
1689 if (psymtab_language
== language_cplus
)
1691 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1692 memcpy (name
, namestring
, p
- namestring
);
1693 name
[p
- namestring
] = '\0';
1694 new_name
= cp_canonicalize_string (name
);
1695 if (new_name
!= NULL
)
1697 sym_len
= strlen (new_name
);
1698 sym_name
= obsavestring (new_name
, sym_len
,
1699 &objfile
->objfile_obstack
);
1707 sym_name
= namestring
;
1708 sym_len
= p
- namestring
;
1711 /* Main processing section for debugging symbols which
1712 the initial read through the symbol tables needs to worry
1713 about. If we reach this point, the symbol which we are
1714 considering is definitely one we are interested in.
1715 p must also contain the (valid) index into the namestring
1716 which indicates the debugging type symbol. */
1721 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1724 if (gdbarch_static_transform_name_p (gdbarch
))
1725 namestring
= gdbarch_static_transform_name (gdbarch
,
1728 add_psymbol_to_list (sym_name
, sym_len
, 1,
1729 VAR_DOMAIN
, LOC_STATIC
,
1730 &objfile
->static_psymbols
,
1732 psymtab_language
, objfile
);
1736 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1738 /* The addresses in these entries are reported to be
1739 wrong. See the code that reads 'G's for symtabs. */
1740 add_psymbol_to_list (sym_name
, sym_len
, 1,
1741 VAR_DOMAIN
, LOC_STATIC
,
1742 &objfile
->global_psymbols
,
1744 psymtab_language
, objfile
);
1748 /* When a 'T' entry is defining an anonymous enum, it
1749 may have a name which is the empty string, or a
1750 single space. Since they're not really defining a
1751 symbol, those shouldn't go in the partial symbol
1752 table. We do pick up the elements of such enums at
1753 'check_enum:', below. */
1754 if (p
>= namestring
+ 2
1755 || (p
== namestring
+ 1
1756 && namestring
[0] != ' '))
1758 add_psymbol_to_list (sym_name
, sym_len
, 1,
1759 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1760 &objfile
->static_psymbols
,
1762 psymtab_language
, objfile
);
1765 /* Also a typedef with the same name. */
1766 add_psymbol_to_list (sym_name
, sym_len
, 1,
1767 VAR_DOMAIN
, LOC_TYPEDEF
,
1768 &objfile
->static_psymbols
,
1770 psymtab_language
, objfile
);
1777 if (p
!= namestring
) /* a name is there, not just :T... */
1779 add_psymbol_to_list (sym_name
, sym_len
, 1,
1780 VAR_DOMAIN
, LOC_TYPEDEF
,
1781 &objfile
->static_psymbols
,
1783 psymtab_language
, objfile
);
1786 /* If this is an enumerated type, we need to
1787 add all the enum constants to the partial symbol
1788 table. This does not cover enums without names, e.g.
1789 "enum {a, b} c;" in C, but fortunately those are
1790 rare. There is no way for GDB to find those from the
1791 enum type without spending too much time on it. Thus
1792 to solve this problem, the compiler needs to put out the
1793 enum in a nameless type. GCC2 does this. */
1795 /* We are looking for something of the form
1796 <name> ":" ("t" | "T") [<number> "="] "e"
1797 {<constant> ":" <value> ","} ";". */
1799 /* Skip over the colon and the 't' or 'T'. */
1801 /* This type may be given a number. Also, numbers can come
1802 in pairs like (0,26). Skip over it. */
1803 while ((*p
>= '0' && *p
<= '9')
1804 || *p
== '(' || *p
== ',' || *p
== ')'
1810 /* The aix4 compiler emits extra crud before the members. */
1813 /* Skip over the type (?). */
1817 /* Skip over the colon. */
1821 /* We have found an enumerated type. */
1822 /* According to comments in read_enum_type
1823 a comma could end it instead of a semicolon.
1824 I don't know where that happens.
1826 while (*p
&& *p
!= ';' && *p
!= ',')
1830 /* Check for and handle cretinous dbx symbol name
1832 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1833 p
= next_symbol_text (objfile
);
1835 /* Point to the character after the name
1836 of the enum constant. */
1837 for (q
= p
; *q
&& *q
!= ':'; q
++)
1839 /* Note that the value doesn't matter for
1840 enum constants in psymtabs, just in symtabs. */
1841 add_psymbol_to_list (p
, q
- p
, 1,
1842 VAR_DOMAIN
, LOC_CONST
,
1843 &objfile
->static_psymbols
, 0,
1844 0, psymtab_language
, objfile
);
1845 /* Point past the name. */
1847 /* Skip over the value. */
1848 while (*p
&& *p
!= ',')
1850 /* Advance past the comma. */
1858 /* Constant, e.g. from "const" in Pascal. */
1859 add_psymbol_to_list (sym_name
, sym_len
, 1,
1860 VAR_DOMAIN
, LOC_CONST
,
1861 &objfile
->static_psymbols
, nlist
.n_value
,
1862 0, psymtab_language
, objfile
);
1868 int name_len
= p
- namestring
;
1869 char *name
= xmalloc (name_len
+ 1);
1870 memcpy (name
, namestring
, name_len
);
1871 name
[name_len
] = '\0';
1872 function_outside_compilation_unit_complaint (name
);
1875 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1876 SECT_OFF_TEXT (objfile
));
1877 /* Kludges for ELF/STABS with Sun ACC */
1878 last_function_name
= namestring
;
1879 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1880 value for the bottom of the text seg in those cases. */
1881 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1882 SECT_OFF_TEXT (objfile
))
1883 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1885 CORE_ADDR minsym_valu
=
1886 find_stab_function_addr (namestring
,
1887 pst
? pst
->filename
: NULL
,
1889 /* find_stab_function_addr will return 0 if the minimal
1890 symbol wasn't found. (Unfortunately, this might also
1891 be a valid address.) Anyway, if it *does* return 0,
1892 it is likely that the value was set correctly to begin
1894 if (minsym_valu
!= 0)
1895 nlist
.n_value
= minsym_valu
;
1897 if (pst
&& textlow_not_set
1898 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1900 pst
->textlow
= nlist
.n_value
;
1901 textlow_not_set
= 0;
1905 /* Keep track of the start of the last function so we
1906 can handle end of function symbols. */
1907 last_function_start
= nlist
.n_value
;
1909 /* In reordered executables this function may lie outside
1910 the bounds created by N_SO symbols. If that's the case
1911 use the address of this function as the low bound for
1912 the partial symbol table. */
1915 || (nlist
.n_value
< pst
->textlow
1917 != ANOFFSET (objfile
->section_offsets
,
1918 SECT_OFF_TEXT (objfile
))))))
1920 pst
->textlow
= nlist
.n_value
;
1921 textlow_not_set
= 0;
1923 add_psymbol_to_list (sym_name
, sym_len
, 1,
1924 VAR_DOMAIN
, LOC_BLOCK
,
1925 &objfile
->static_psymbols
,
1927 psymtab_language
, objfile
);
1930 /* Global functions were ignored here, but now they
1931 are put into the global psymtab like one would expect.
1932 They're also in the minimal symbol table. */
1936 int name_len
= p
- namestring
;
1937 char *name
= xmalloc (name_len
+ 1);
1938 memcpy (name
, namestring
, name_len
);
1939 name
[name_len
] = '\0';
1940 function_outside_compilation_unit_complaint (name
);
1943 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1944 SECT_OFF_TEXT (objfile
));
1945 /* Kludges for ELF/STABS with Sun ACC */
1946 last_function_name
= namestring
;
1947 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1948 value for the bottom of the text seg in those cases. */
1949 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1950 SECT_OFF_TEXT (objfile
))
1951 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1953 CORE_ADDR minsym_valu
=
1954 find_stab_function_addr (namestring
,
1955 pst
? pst
->filename
: NULL
,
1957 /* find_stab_function_addr will return 0 if the minimal
1958 symbol wasn't found. (Unfortunately, this might also
1959 be a valid address.) Anyway, if it *does* return 0,
1960 it is likely that the value was set correctly to begin
1962 if (minsym_valu
!= 0)
1963 nlist
.n_value
= minsym_valu
;
1965 if (pst
&& textlow_not_set
1966 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1968 pst
->textlow
= nlist
.n_value
;
1969 textlow_not_set
= 0;
1973 /* Keep track of the start of the last function so we
1974 can handle end of function symbols. */
1975 last_function_start
= nlist
.n_value
;
1977 /* In reordered executables this function may lie outside
1978 the bounds created by N_SO symbols. If that's the case
1979 use the address of this function as the low bound for
1980 the partial symbol table. */
1983 || (nlist
.n_value
< pst
->textlow
1985 != ANOFFSET (objfile
->section_offsets
,
1986 SECT_OFF_TEXT (objfile
))))))
1988 pst
->textlow
= nlist
.n_value
;
1989 textlow_not_set
= 0;
1991 add_psymbol_to_list (sym_name
, sym_len
, 1,
1992 VAR_DOMAIN
, LOC_BLOCK
,
1993 &objfile
->global_psymbols
,
1995 psymtab_language
, objfile
);
1998 /* Two things show up here (hopefully); static symbols of
1999 local scope (static used inside braces) or extensions
2000 of structure symbols. We can ignore both. */
2014 case '#': /* for symbol identification (used in live ranges) */
2018 /* It is a C++ nested symbol. We don't need to record it
2019 (I don't think); if we try to look up foo::bar::baz,
2020 then symbols for the symtab containing foo should get
2021 read in, I think. */
2022 /* Someone says sun cc puts out symbols like
2023 /foo/baz/maclib::/usr/local/bin/maclib,
2024 which would get here with a symbol type of ':'. */
2028 /* Unexpected symbol descriptor. The second and subsequent stabs
2029 of a continued stab can show up here. The question is
2030 whether they ever can mimic a normal stab--it would be
2031 nice if not, since we certainly don't want to spend the
2032 time searching to the end of every string looking for
2035 complaint (&symfile_complaints
, _("unknown symbol descriptor `%c'"),
2038 /* Ignore it; perhaps it is an extension that we don't
2046 namestring
= set_namestring (objfile
, &nlist
);
2048 /* Find the corresponding bincl and mark that psymtab on the
2049 psymtab dependency list */
2051 struct partial_symtab
*needed_pst
=
2052 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2054 /* If this include file was defined earlier in this file,
2056 if (needed_pst
== pst
)
2064 for (i
= 0; i
< dependencies_used
; i
++)
2065 if (dependency_list
[i
] == needed_pst
)
2071 /* If it's already in the list, skip the rest. */
2075 dependency_list
[dependencies_used
++] = needed_pst
;
2076 if (dependencies_used
>= dependencies_allocated
)
2078 struct partial_symtab
**orig
= dependency_list
;
2080 (struct partial_symtab
**)
2081 alloca ((dependencies_allocated
*= 2)
2082 * sizeof (struct partial_symtab
*));
2083 memcpy (dependency_list
, orig
,
2085 * sizeof (struct partial_symtab
*)));
2087 fprintf_unfiltered (gdb_stderr
,
2088 "Had to reallocate dependency list.\n");
2089 fprintf_unfiltered (gdb_stderr
,
2090 "New dependencies allocated: %d\n",
2091 dependencies_allocated
);
2099 /* Solaris 2 end of module, finish current partial symbol table.
2100 end_psymtab will set pst->texthigh to the proper value, which
2101 is necessary if a module compiled without debugging info
2102 follows this module. */
2103 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2105 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2106 symnum
* symbol_size
,
2108 dependency_list
, dependencies_used
, textlow_not_set
);
2109 pst
= (struct partial_symtab
*) 0;
2111 dependencies_used
= 0;
2112 has_line_numbers
= 0;
2118 HANDLE_RBRAC (nlist
.n_value
);
2124 case N_SSYM
: /* Claim: Structure or union element.
2125 Hopefully, I can ignore this. */
2126 case N_ENTRY
: /* Alternate entry point; can ignore. */
2127 case N_MAIN
: /* Can definitely ignore this. */
2128 case N_CATCH
: /* These are GNU C++ extensions */
2129 case N_EHDECL
: /* that can safely be ignored here. */
2139 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2140 case N_DEFD
: /* GNU Modula-2 */
2141 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2143 case N_OBJ
: /* useless types from Solaris */
2146 /* These symbols aren't interesting; don't worry about them */
2151 /* If we haven't found it yet, ignore it. It's probably some
2152 new type we don't know about yet. */
2153 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2158 /* If there's stuff to be cleaned up, clean it up. */
2161 /* Don't set pst->texthigh lower than it already is. */
2162 CORE_ADDR text_end
=
2163 (lowest_text_address
== (CORE_ADDR
) -1
2164 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2165 SECT_OFF_TEXT (objfile
)))
2166 : lowest_text_address
)
2169 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2170 symnum
* symbol_size
,
2171 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2172 dependency_list
, dependencies_used
, textlow_not_set
);
2175 do_cleanups (back_to
);
2178 /* Allocate and partially fill a partial symtab. It will be
2179 completely filled at the end of the symbol list.
2181 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2182 is the address relative to which its symbols are (incremental) or 0
2185 static struct partial_symtab
*
2186 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2187 int ldsymoff
, struct partial_symbol
**global_syms
,
2188 struct partial_symbol
**static_syms
)
2190 struct partial_symtab
*result
=
2191 start_psymtab_common (objfile
, objfile
->section_offsets
,
2192 filename
, textlow
, global_syms
, static_syms
);
2194 result
->read_symtab_private
= (char *)
2195 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2196 LDSYMOFF (result
) = ldsymoff
;
2197 result
->read_symtab
= dbx_psymtab_to_symtab
;
2198 SYMBOL_SIZE (result
) = symbol_size
;
2199 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2200 STRING_OFFSET (result
) = string_table_offset
;
2201 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2204 /* If we're handling an ELF file, drag some section-relocation info
2205 for this source file out of the ELF symbol table, to compensate for
2206 Sun brain death. This replaces the section_offsets in this psymtab,
2208 elfstab_offset_sections (objfile
, result
);
2211 /* Deduce the source language from the filename for this psymtab. */
2212 psymtab_language
= deduce_language_from_filename (filename
);
2217 /* Close off the current usage of PST.
2218 Returns PST or NULL if the partial symtab was empty and thrown away.
2220 FIXME: List variables and peculiarities of same. */
2222 struct partial_symtab
*
2223 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2224 int capping_symbol_offset
, CORE_ADDR capping_text
,
2225 struct partial_symtab
**dependency_list
, int number_dependencies
,
2226 int textlow_not_set
)
2229 struct objfile
*objfile
= pst
->objfile
;
2230 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2232 if (capping_symbol_offset
!= -1)
2233 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2234 pst
->texthigh
= capping_text
;
2236 /* Under Solaris, the N_SO symbols always have a value of 0,
2237 instead of the usual address of the .o file. Therefore,
2238 we have to do some tricks to fill in texthigh and textlow.
2239 The first trick is: if we see a static
2240 or global function, and the textlow for the current pst
2241 is not set (ie: textlow_not_set), then we use that function's
2242 address for the textlow of the pst. */
2244 /* Now, to fill in texthigh, we remember the last function seen
2245 in the .o file. Also, there's a hack in
2246 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2247 to here via the misc_info field. Therefore, we can fill in
2248 a reliable texthigh by taking the address plus size of the
2249 last function in the file. */
2251 if (pst
->texthigh
== 0 && last_function_name
2252 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2256 struct minimal_symbol
*minsym
;
2258 p
= strchr (last_function_name
, ':');
2260 p
= last_function_name
;
2261 n
= p
- last_function_name
;
2263 strncpy (p
, last_function_name
, n
);
2266 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2269 /* Sun Fortran appends an underscore to the minimal symbol name,
2270 try again with an appended underscore if the minimal symbol
2274 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2278 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2280 last_function_name
= NULL
;
2283 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2285 /* this test will be true if the last .o file is only data */
2286 else if (textlow_not_set
)
2287 pst
->textlow
= pst
->texthigh
;
2290 struct partial_symtab
*p1
;
2292 /* If we know our own starting text address, then walk through all other
2293 psymtabs for this objfile, and if any didn't know their ending text
2294 address, set it to our starting address. Take care to not set our
2295 own ending address to our starting address, nor to set addresses on
2296 `dependency' files that have both textlow and texthigh zero. */
2298 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2300 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2302 p1
->texthigh
= pst
->textlow
;
2303 /* if this file has only data, then make textlow match texthigh */
2304 if (p1
->textlow
== 0)
2305 p1
->textlow
= p1
->texthigh
;
2310 /* End of kludge for patching Solaris textlow and texthigh. */
2312 pst
->n_global_syms
=
2313 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2314 + pst
->globals_offset
);
2315 pst
->n_static_syms
=
2316 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2317 + pst
->statics_offset
);
2319 pst
->number_of_dependencies
= number_dependencies
;
2320 if (number_dependencies
)
2322 pst
->dependencies
= (struct partial_symtab
**)
2323 obstack_alloc (&objfile
->objfile_obstack
,
2324 number_dependencies
* sizeof (struct partial_symtab
*));
2325 memcpy (pst
->dependencies
, dependency_list
,
2326 number_dependencies
* sizeof (struct partial_symtab
*));
2329 pst
->dependencies
= 0;
2331 for (i
= 0; i
< num_includes
; i
++)
2333 struct partial_symtab
*subpst
=
2334 allocate_psymtab (include_list
[i
], objfile
);
2336 /* Copy the sesction_offsets array from the main psymtab. */
2337 subpst
->section_offsets
= pst
->section_offsets
;
2338 subpst
->read_symtab_private
=
2339 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2340 sizeof (struct symloc
));
2344 subpst
->texthigh
= 0;
2346 /* We could save slight bits of space by only making one of these,
2347 shared by the entire set of include files. FIXME-someday. */
2348 subpst
->dependencies
= (struct partial_symtab
**)
2349 obstack_alloc (&objfile
->objfile_obstack
,
2350 sizeof (struct partial_symtab
*));
2351 subpst
->dependencies
[0] = pst
;
2352 subpst
->number_of_dependencies
= 1;
2354 subpst
->globals_offset
=
2355 subpst
->n_global_syms
=
2356 subpst
->statics_offset
=
2357 subpst
->n_static_syms
= 0;
2361 subpst
->read_symtab
= pst
->read_symtab
;
2364 sort_pst_symbols (pst
);
2366 /* If there is already a psymtab or symtab for a file of this name, remove it.
2367 (If there is a symtab, more drastic things also happen.)
2368 This happens in VxWorks. */
2369 free_named_symtabs (pst
->filename
);
2371 if (num_includes
== 0
2372 && number_dependencies
== 0
2373 && pst
->n_global_syms
== 0
2374 && pst
->n_static_syms
== 0
2375 && has_line_numbers
== 0)
2377 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2378 it is on the obstack, but we can forget to chain it on the list. */
2379 /* Empty psymtabs happen as a result of header files which don't have
2380 any symbols in them. There can be a lot of them. But this check
2381 is wrong, in that a psymtab with N_SLINE entries but nothing else
2382 is not empty, but we don't realize that. Fixing that without slowing
2383 things down might be tricky. */
2385 discard_psymtab (pst
);
2387 /* Indicate that psymtab was thrown away. */
2388 pst
= (struct partial_symtab
*) NULL
;
2394 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2396 struct cleanup
*old_chain
;
2404 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2405 Shouldn't happen.\n",
2410 /* Read in all partial symtabs on which this one is dependent */
2411 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2412 if (!pst
->dependencies
[i
]->readin
)
2414 /* Inform about additional files that need to be read in. */
2417 fputs_filtered (" ", gdb_stdout
);
2419 fputs_filtered ("and ", gdb_stdout
);
2421 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2422 wrap_here (""); /* Flush output */
2423 gdb_flush (gdb_stdout
);
2425 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2428 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2430 /* Init stuff necessary for reading in symbols */
2433 old_chain
= make_cleanup (really_free_pendings
, 0);
2434 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2435 symbol_size
= SYMBOL_SIZE (pst
);
2437 /* Read in this file's symbols */
2438 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2439 read_ofile_symtab (pst
);
2441 do_cleanups (old_chain
);
2447 /* Read in all of the symbols for a given psymtab for real.
2448 Be verbose about it if the user wants that. */
2451 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2454 struct cleanup
*back_to
= NULL
;
2461 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2462 Shouldn't happen.\n",
2467 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2469 /* Print the message now, before reading the string table,
2470 to avoid disconcerting pauses. */
2473 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2474 gdb_flush (gdb_stdout
);
2477 sym_bfd
= pst
->objfile
->obfd
;
2479 next_symbol_text_func
= dbx_next_symbol_text
;
2481 if (DBX_STAB_SECTION (pst
->objfile
))
2484 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2485 DBX_STAB_SECTION (pst
->objfile
),
2488 back_to
= make_cleanup (free_current_contents
,
2489 (void *) &stabs_data
);
2492 dbx_psymtab_to_symtab_1 (pst
);
2495 do_cleanups (back_to
);
2497 /* Match with global symbols. This only needs to be done once,
2498 after all of the symtabs and dependencies have been read in. */
2499 scan_file_globals (pst
->objfile
);
2501 /* Finish up the debug error message. */
2503 printf_filtered ("done.\n");
2507 /* Read in a defined section of a specific object file's symbols. */
2510 read_ofile_symtab (struct partial_symtab
*pst
)
2513 struct external_nlist
*bufp
;
2514 struct internal_nlist nlist
;
2516 unsigned max_symnum
;
2518 struct objfile
*objfile
;
2519 int sym_offset
; /* Offset to start of symbols to read */
2520 int sym_size
; /* Size of symbols to read */
2521 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2522 int text_size
; /* Size of text segment for symbols */
2523 struct section_offsets
*section_offsets
;
2525 objfile
= pst
->objfile
;
2526 sym_offset
= LDSYMOFF (pst
);
2527 sym_size
= LDSYMLEN (pst
);
2528 text_offset
= pst
->textlow
;
2529 text_size
= pst
->texthigh
- pst
->textlow
;
2530 /* This cannot be simply objfile->section_offsets because of
2531 elfstab_offset_sections() which initializes the psymtab section
2532 offsets information in a special way, and that is different from
2533 objfile->section_offsets. */
2534 section_offsets
= pst
->section_offsets
;
2536 current_objfile
= objfile
;
2537 subfile_stack
= NULL
;
2539 stringtab_global
= DBX_STRINGTAB (objfile
);
2540 last_source_file
= NULL
;
2542 abfd
= objfile
->obfd
;
2543 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2544 symbuf_end
= symbuf_idx
= 0;
2546 symbuf_left
= sym_offset
+ sym_size
;
2548 /* It is necessary to actually read one symbol *before* the start
2549 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2550 occurs before the N_SO symbol.
2552 Detecting this in read_dbx_symtab
2553 would slow down initial readin, so we look for it here instead. */
2554 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2556 stabs_seek (sym_offset
- symbol_size
);
2558 bufp
= &symbuf
[symbuf_idx
++];
2559 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2560 OBJSTAT (objfile
, n_stabs
++);
2562 namestring
= set_namestring (objfile
, &nlist
);
2564 processing_gcc_compilation
= 0;
2565 if (nlist
.n_type
== N_TEXT
)
2567 const char *tempstring
= namestring
;
2569 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2570 processing_gcc_compilation
= 1;
2571 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2572 processing_gcc_compilation
= 2;
2573 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2575 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2576 processing_gcc_compilation
= 2;
2579 /* Try to select a C++ demangling based on the compilation unit
2583 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2584 know whether it will use the old style or v3 mangling. */
2585 if (processing_gcc_compilation
)
2587 if (AUTO_DEMANGLING
)
2589 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2596 /* The N_SO starting this symtab is the first symbol, so we
2597 better not check the symbol before it. I'm not this can
2598 happen, but it doesn't hurt to check for it. */
2599 stabs_seek (sym_offset
);
2600 processing_gcc_compilation
= 0;
2603 if (symbuf_idx
== symbuf_end
)
2605 bufp
= &symbuf
[symbuf_idx
];
2606 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2607 error (_("First symbol in segment of executable not a source symbol"));
2609 max_symnum
= sym_size
/ symbol_size
;
2612 symnum
< max_symnum
;
2615 QUIT
; /* Allow this to be interruptable */
2616 if (symbuf_idx
== symbuf_end
)
2618 bufp
= &symbuf
[symbuf_idx
++];
2619 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2620 OBJSTAT (objfile
, n_stabs
++);
2622 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2624 namestring
= set_namestring (objfile
, &nlist
);
2628 if (sizeof (nlist
.n_value
) > 4
2629 /* We are a 64-bit debugger debugging a 32-bit program. */
2630 && (type
== N_LSYM
|| type
== N_PSYM
))
2631 /* We have to be careful with the n_value in the case of N_LSYM
2632 and N_PSYM entries, because they are signed offsets from frame
2633 pointer, but we actually read them as unsigned 32-bit values.
2634 This is not a problem for 32-bit debuggers, for which negative
2635 values end up being interpreted correctly (as negative
2636 offsets) due to integer overflow.
2637 But we need to sign-extend the value for 64-bit debuggers,
2638 or we'll end up interpreting negative values as very large
2639 positive offsets. */
2640 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2641 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2642 namestring
, section_offsets
, objfile
);
2644 /* We skip checking for a new .o or -l file; that should never
2645 happen in this routine. */
2646 else if (type
== N_TEXT
)
2648 /* I don't think this code will ever be executed, because
2649 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2650 the N_SO symbol which starts this source file.
2651 However, there is no reason not to accept
2652 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2654 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2655 processing_gcc_compilation
= 1;
2656 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2657 processing_gcc_compilation
= 2;
2660 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2661 know whether it will use the old style or v3 mangling. */
2662 if (AUTO_DEMANGLING
)
2664 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2668 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2669 || type
== (unsigned char) N_NBTEXT
2672 /* Global symbol: see if we came across a dbx defintion for
2673 a corresponding symbol. If so, store the value. Remove
2674 syms from the chain when their values are stored, but
2675 search the whole chain, as there may be several syms from
2676 different files with the same name. */
2677 /* This is probably not true. Since the files will be read
2678 in one at a time, each reference to a global symbol will
2679 be satisfied in each file as it appears. So we skip this
2685 /* In a Solaris elf file, this variable, which comes from the
2686 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2687 which comes from pst->textlow is correct. */
2688 if (last_source_start_addr
== 0)
2689 last_source_start_addr
= text_offset
;
2691 /* In reordered executables last_source_start_addr may not be the
2692 lower bound for this symtab, instead use text_offset which comes
2693 from pst->textlow which is correct. */
2694 if (last_source_start_addr
> text_offset
)
2695 last_source_start_addr
= text_offset
;
2697 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2698 SECT_OFF_TEXT (objfile
));
2702 current_objfile
= NULL
;
2706 /* This handles a single symbol from the symbol-file, building symbols
2707 into a GDB symtab. It takes these arguments and an implicit argument.
2709 TYPE is the type field of the ".stab" symbol entry.
2710 DESC is the desc field of the ".stab" entry.
2711 VALU is the value field of the ".stab" entry.
2712 NAME is the symbol name, in our address space.
2713 SECTION_OFFSETS is a set of amounts by which the sections of this
2714 object file were relocated when it was loaded into memory. Note
2715 that these section_offsets are not the objfile->section_offsets but
2716 the pst->section_offsets. All symbols that refer to memory
2717 locations need to be offset by these amounts.
2718 OBJFILE is the object file from which we are reading symbols. It
2719 is used in end_symtab. */
2722 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2723 struct section_offsets
*section_offsets
,
2724 struct objfile
*objfile
)
2726 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2727 struct context_stack
*new;
2728 /* This remembers the address of the start of a function. It is
2729 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2730 are relative to the current function's start address. On systems
2731 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2732 and is used to relocate these symbol types rather than
2734 static CORE_ADDR function_start_offset
;
2736 /* This holds the address of the start of a function, without the
2737 system peculiarities of function_start_offset. */
2738 static CORE_ADDR last_function_start
;
2740 /* If this is nonzero, we've seen an N_SLINE since the start of the
2741 current function. We use this to tell us to move the first sline
2742 to the beginning of the function regardless of what its given
2744 static int sline_found_in_function
= 1;
2746 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2747 source file. Used to detect the SunPRO solaris compiler. */
2748 static int n_opt_found
;
2750 /* The stab type used for the definition of the last function.
2751 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2752 static int function_stab_type
= 0;
2754 if (!block_address_function_relative
)
2756 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2757 function start address, so just use the text offset. */
2758 function_start_offset
=
2759 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2762 /* Something is wrong if we see real data before seeing a source
2765 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2767 /* Ignore any symbols which appear before an N_SO symbol.
2768 Currently no one puts symbols there, but we should deal
2769 gracefully with the case. A complain()t might be in order,
2770 but this should not be an error (). */
2779 if (*name
== '\000')
2781 /* This N_FUN marks the end of a function. This closes off
2782 the current block. */
2783 struct block
*block
;
2785 if (context_stack_depth
<= 0)
2787 lbrac_mismatch_complaint (symnum
);
2791 /* The following check is added before recording line 0 at
2792 end of function so as to handle hand-generated stabs
2793 which may have an N_FUN stabs at the end of the function,
2794 but no N_SLINE stabs. */
2795 if (sline_found_in_function
)
2797 CORE_ADDR addr
= last_function_start
+ valu
;
2798 record_line (current_subfile
, 0,
2799 gdbarch_addr_bits_remove (gdbarch
, addr
));
2802 within_function
= 0;
2803 new = pop_context ();
2805 /* Make a block for the local symbols within. */
2806 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2807 new->start_addr
, new->start_addr
+ valu
,
2810 /* For C++, set the block's scope. */
2811 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2812 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2815 /* May be switching to an assembler file which may not be using
2816 block relative stabs, so reset the offset. */
2817 if (block_address_function_relative
)
2818 function_start_offset
= 0;
2823 sline_found_in_function
= 0;
2825 /* Relocate for dynamic loading. */
2826 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2827 valu
= gdbarch_smash_text_address (gdbarch
, valu
);
2828 last_function_start
= valu
;
2830 goto define_a_symbol
;
2833 /* This "symbol" just indicates the start of an inner lexical
2834 context within a function. */
2836 /* Ignore extra outermost context from SunPRO cc and acc. */
2837 if (n_opt_found
&& desc
== 1)
2840 if (block_address_function_relative
)
2841 /* Relocate for Sun ELF acc fn-relative syms. */
2842 valu
+= function_start_offset
;
2844 /* On most machines, the block addresses are relative to the
2845 N_SO, the linker did not relocate them (sigh). */
2846 valu
+= last_source_start_addr
;
2848 new = push_context (desc
, valu
);
2852 /* This "symbol" just indicates the end of an inner lexical
2853 context that was started with N_LBRAC. */
2855 /* Ignore extra outermost context from SunPRO cc and acc. */
2856 if (n_opt_found
&& desc
== 1)
2859 if (block_address_function_relative
)
2860 /* Relocate for Sun ELF acc fn-relative syms. */
2861 valu
+= function_start_offset
;
2863 /* On most machines, the block addresses are relative to the
2864 N_SO, the linker did not relocate them (sigh). */
2865 valu
+= last_source_start_addr
;
2867 if (context_stack_depth
<= 0)
2869 lbrac_mismatch_complaint (symnum
);
2873 new = pop_context ();
2874 if (desc
!= new->depth
)
2875 lbrac_mismatch_complaint (symnum
);
2877 if (local_symbols
!= NULL
)
2879 /* GCC development snapshots from March to December of
2880 2000 would output N_LSYM entries after N_LBRAC
2881 entries. As a consequence, these symbols are simply
2882 discarded. Complain if this is the case. */
2883 complaint (&symfile_complaints
, _("\
2884 misplaced N_LBRAC entry; discarding local symbols which have \
2885 no enclosing block"));
2887 local_symbols
= new->locals
;
2889 if (context_stack_depth
> 1)
2891 /* This is not the outermost LBRAC...RBRAC pair in the
2892 function, its local symbols preceded it, and are the ones
2893 just recovered from the context stack. Define the block
2894 for them (but don't bother if the block contains no
2895 symbols. Should we complain on blocks without symbols?
2896 I can't think of any useful purpose for them). */
2897 if (local_symbols
!= NULL
)
2899 /* Muzzle a compiler bug that makes end < start.
2901 ??? Which compilers? Is this ever harmful?. */
2902 if (new->start_addr
> valu
)
2904 complaint (&symfile_complaints
,
2905 _("block start larger than block end"));
2906 new->start_addr
= valu
;
2908 /* Make a block for the local symbols within. */
2909 finish_block (0, &local_symbols
, new->old_blocks
,
2910 new->start_addr
, valu
, objfile
);
2915 /* This is the outermost LBRAC...RBRAC pair. There is no
2916 need to do anything; leave the symbols that preceded it
2917 to be attached to the function's own block. We need to
2918 indicate that we just moved outside of the function. */
2919 within_function
= 0;
2926 /* This kind of symbol indicates the start of an object file.
2927 Relocate for dynamic loading. */
2928 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2932 /* This type of symbol indicates the start of data for one
2933 source file. Finish the symbol table of the previous source
2934 file (if any) and start accumulating a new symbol table.
2935 Relocate for dynamic loading. */
2936 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2940 if (last_source_file
)
2942 /* Check if previous symbol was also an N_SO (with some
2943 sanity checks). If so, that one was actually the
2944 directory name, and the current one is the real file
2945 name. Patch things up. */
2946 if (previous_stab_code
== (unsigned char) N_SO
)
2948 patch_subfile_names (current_subfile
, name
);
2949 break; /* Ignore repeated SOs */
2951 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2955 /* Null name means this just marks the end of text for this .o
2956 file. Don't start a new symtab in this case. */
2957 if (*name
== '\000')
2960 if (block_address_function_relative
)
2961 function_start_offset
= 0;
2964 start_symtab (name
, NULL
, valu
);
2965 record_debugformat ("stabs");
2969 /* This type of symbol indicates the start of data for a
2970 sub-source-file, one whose contents were copied or included
2971 in the compilation of the main source file (whose name was
2972 given in the N_SO symbol). Relocate for dynamic loading. */
2973 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2974 start_subfile (name
, current_subfile
->dirname
);
2979 add_new_header_file (name
, valu
);
2980 start_subfile (name
, current_subfile
->dirname
);
2984 start_subfile (pop_subfile (), current_subfile
->dirname
);
2988 add_old_header_file (name
, valu
);
2992 /* This type of "symbol" really just records one line-number --
2993 core-address correspondence. Enter it in the line list for
2994 this symbol table. */
2996 /* Relocate for dynamic loading and for ELF acc
2997 function-relative symbols. */
2998 valu
+= function_start_offset
;
3000 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3001 middle of the prologue instead of right at the start of the
3002 function. To deal with this we record the address for the
3003 first N_SLINE stab to be the start of the function instead of
3004 the listed location. We really shouldn't to this. When
3005 compiling with optimization, this first N_SLINE stab might be
3006 optimized away. Other (non-GCC) compilers don't emit this
3007 stab at all. There is no real harm in having an extra
3008 numbered line, although it can be a bit annoying for the
3009 user. However, it totally screws up our testsuite.
3011 So for now, keep adjusting the address of the first N_SLINE
3012 stab, but only for code compiled with GCC. */
3014 if (within_function
&& sline_found_in_function
== 0)
3016 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
3017 last_function_start
: valu
;
3018 record_line (current_subfile
, desc
,
3019 gdbarch_addr_bits_remove (gdbarch
, addr
));
3020 sline_found_in_function
= 1;
3023 record_line (current_subfile
, desc
,
3024 gdbarch_addr_bits_remove (gdbarch
, valu
));
3028 common_block_start (name
, objfile
);
3032 common_block_end (objfile
);
3035 /* The following symbol types need to have the appropriate
3036 offset added to their value; then we process symbol
3037 definitions in the name. */
3039 case N_STSYM
: /* Static symbol in data segment. */
3040 case N_LCSYM
: /* Static symbol in BSS segment. */
3041 case N_ROSYM
: /* Static symbol in read-only data segment. */
3042 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3043 Solaris 2's stabs-in-elf makes *most* symbols relative but
3044 leaves a few absolute (at least for Solaris 2.1 and version
3045 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3046 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3047 relocates it) .stab "foo:V...",N_STSYM is relative (section
3048 base subtracted). This leaves us no choice but to search for
3049 the 'S' or 'V'... (or pass the whole section_offsets stuff
3050 down ONE MORE function call level, which we really don't want
3055 /* Normal object file and NLMs have non-zero text seg offsets,
3056 but don't need their static syms offset in this fashion.
3057 XXX - This is really a crock that should be fixed in the
3058 solib handling code so that I don't have to work around it
3061 if (!symfile_relocatable
)
3063 p
= strchr (name
, ':');
3064 if (p
!= 0 && p
[1] == 'S')
3066 /* The linker relocated it. We don't want to add an
3067 elfstab_offset_sections-type offset, but we *do*
3068 want to add whatever solib.c passed to
3069 symbol_file_add as addr (this is known to affect
3070 SunOS 4, and I suspect ELF too). Since
3071 elfstab_offset_sections currently does not muck
3072 with the text offset (there is no Ttext.text
3073 symbol), we can get addr from the text offset. If
3074 elfstab_offset_sections ever starts dealing with
3075 the text offset, and we still need to do this, we
3076 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3077 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3078 goto define_a_symbol
;
3081 /* Since it's not the kludge case, re-dispatch to the right
3092 internal_error (__FILE__
, __LINE__
,
3093 _("failed internal consistency check"));
3097 case_N_STSYM
: /* Static symbol in data segment. */
3098 case N_DSLINE
: /* Source line number, data segment. */
3099 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3100 goto define_a_symbol
;
3102 case_N_LCSYM
: /* Static symbol in BSS segment. */
3103 case N_BSLINE
: /* Source line number, BSS segment. */
3104 /* N_BROWS: overlaps with N_BSLINE. */
3105 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3106 goto define_a_symbol
;
3108 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3109 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3110 goto define_a_symbol
;
3112 case N_ENTRY
: /* Alternate entry point. */
3113 /* Relocate for dynamic loading. */
3114 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3115 goto define_a_symbol
;
3117 /* The following symbol types we don't know how to process.
3118 Handle them in a "default" way, but complain to people who
3121 case N_CATCH
: /* Exception handler catcher. */
3122 case N_EHDECL
: /* Exception handler name. */
3123 case N_PC
: /* Global symbol in Pascal. */
3124 case N_M2C
: /* Modula-2 compilation unit. */
3125 /* N_MOD2: overlaps with N_EHDECL. */
3126 case N_SCOPE
: /* Modula-2 scope information. */
3127 case N_ECOML
: /* End common (local name). */
3128 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3133 unknown_symtype_complaint (hex_string (type
));
3136 /* The following symbol types don't need the address field
3137 relocated, since it is either unused, or is absolute. */
3139 case N_GSYM
: /* Global variable. */
3140 case N_NSYMS
: /* Number of symbols (Ultrix). */
3141 case N_NOMAP
: /* No map? (Ultrix). */
3142 case N_RSYM
: /* Register variable. */
3143 case N_DEFD
: /* Modula-2 GNU module dependency. */
3144 case N_SSYM
: /* Struct or union element. */
3145 case N_LSYM
: /* Local symbol in stack. */
3146 case N_PSYM
: /* Parameter variable. */
3147 case N_LENG
: /* Length of preceding symbol type. */
3151 char *colon_pos
= strchr (name
, ':');
3152 if (colon_pos
== NULL
)
3155 deftype
= colon_pos
[1];
3161 function_stab_type
= type
;
3163 /* Deal with the SunPRO 3.0 compiler which omits the
3164 address from N_FUN symbols. */
3166 && valu
== ANOFFSET (section_offsets
,
3167 SECT_OFF_TEXT (objfile
))
3168 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3170 CORE_ADDR minsym_valu
=
3171 find_stab_function_addr (name
, last_source_file
, objfile
);
3173 /* The function find_stab_function_addr will return
3174 0 if the minimal symbol wasn't found.
3175 (Unfortunately, this might also be a valid
3176 address.) Anyway, if it *does* return 0, it is
3177 likely that the value was set correctly to begin
3179 if (minsym_valu
!= 0)
3183 if (block_address_function_relative
)
3184 /* For Solaris 2 compilers, the block addresses and
3185 N_SLINE's are relative to the start of the
3186 function. On normal systems, and when using GCC on
3187 Solaris 2, these addresses are just absolute, or
3188 relative to the N_SO, depending on
3189 BLOCK_ADDRESS_ABSOLUTE. */
3190 function_start_offset
= valu
;
3192 within_function
= 1;
3194 if (context_stack_depth
> 1)
3196 complaint (&symfile_complaints
,
3197 _("unmatched N_LBRAC before symtab pos %d"),
3202 if (context_stack_depth
> 0)
3204 struct block
*block
;
3206 new = pop_context ();
3207 /* Make a block for the local symbols within. */
3208 block
= finish_block (new->name
, &local_symbols
,
3209 new->old_blocks
, new->start_addr
,
3212 /* For C++, set the block's scope. */
3213 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3214 cp_set_block_scope (new->name
, block
,
3215 &objfile
->objfile_obstack
,
3219 new = push_context (0, valu
);
3220 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3224 define_symbol (valu
, name
, desc
, type
, objfile
);
3230 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3231 for a bunch of other flags, too. Someday we may parse their
3232 flags; for now we ignore theirs and hope they'll ignore ours. */
3233 case N_OPT
: /* Solaris 2: Compiler options. */
3236 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3238 processing_gcc_compilation
= 2;
3239 #if 0 /* Works, but is experimental. -fnf */
3240 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3241 we don't know whether it will use the old style or v3
3243 if (AUTO_DEMANGLING
)
3245 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3254 case N_MAIN
: /* Name of main routine. */
3255 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3256 it with a symbol file with "main" and without N_MAIN. I'm
3257 not sure exactly what rule to follow but probably something
3258 like: N_MAIN takes precedence over "main" no matter what
3259 objfile it is in; If there is more than one N_MAIN, choose
3260 the one in the symfile_objfile; If there is more than one
3261 N_MAIN within a given objfile, complain() and choose
3262 arbitrarily. (kingdon) */
3264 set_main_name (name
);
3267 /* The following symbol types can be ignored. */
3268 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3269 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3270 /* N_UNDF: Solaris 2: File separator mark. */
3271 /* N_UNDF: -- we will never encounter it, since we only process
3272 one file's symbols at once. */
3273 case N_ENDM
: /* Solaris 2: End of module. */
3274 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3278 /* '#' is a GNU C extension to allow one symbol to refer to another
3281 Generally this is used so that an alias can refer to its main
3285 /* Initialize symbol reference names and determine if this is a
3286 definition. If a symbol reference is being defined, go ahead
3287 and add it. Otherwise, just return. */
3292 /* If this stab defines a new reference ID that is not on the
3293 reference list, then put it on the reference list.
3295 We go ahead and advance NAME past the reference, even though
3296 it is not strictly necessary at this time. */
3297 refnum
= symbol_reference_defined (&s
);
3299 if (!ref_search (refnum
))
3300 ref_add (refnum
, 0, name
, valu
);
3304 previous_stab_code
= type
;
3307 /* FIXME: The only difference between this and elfstab_build_psymtabs
3308 is the call to install_minimal_symbols for elf, and the support for
3309 split sections. If the differences are really that small, the code
3310 should be shared. */
3312 /* Scan and build partial symbols for an coff symbol file.
3313 The coff file has already been processed to get its minimal symbols.
3315 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3318 OBJFILE is the object file we are reading symbols from.
3319 ADDR is the address relative to which the symbols are (e.g.
3320 the base address of the text segment).
3321 TEXTADDR is the address of the text section.
3322 TEXTSIZE is the size of the text section.
3323 STABSECTS is the list of .stab sections in OBJFILE.
3324 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3325 .stabstr section exists.
3327 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3328 adjusted for coff details. */
3331 coffstab_build_psymtabs (struct objfile
*objfile
,
3332 CORE_ADDR textaddr
, unsigned int textsize
,
3333 struct stab_section_list
*stabsects
,
3334 file_ptr stabstroffset
, unsigned int stabstrsize
)
3337 bfd
*sym_bfd
= objfile
->obfd
;
3338 char *name
= bfd_get_filename (sym_bfd
);
3339 struct dbx_symfile_info
*info
;
3340 unsigned int stabsize
;
3342 /* There is already a dbx_symfile_info allocated by our caller.
3343 It might even contain some info from the coff symtab to help us. */
3344 info
= objfile
->deprecated_sym_stab_info
;
3346 DBX_TEXT_ADDR (objfile
) = textaddr
;
3347 DBX_TEXT_SIZE (objfile
) = textsize
;
3349 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3350 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3351 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3353 if (stabstrsize
> bfd_get_size (sym_bfd
))
3354 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3355 DBX_STRINGTAB (objfile
) = (char *)
3356 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3357 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3359 /* Now read in the string table in one big gulp. */
3361 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3363 perror_with_name (name
);
3364 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3365 if (val
!= stabstrsize
)
3366 perror_with_name (name
);
3368 stabsread_new_init ();
3369 buildsym_new_init ();
3370 free_header_files ();
3371 init_header_files ();
3373 processing_acc_compilation
= 1;
3375 /* In a coff file, we've already installed the minimal symbols that came
3376 from the coff (non-stab) symbol table, so always act like an
3377 incremental load here. */
3378 if (stabsects
->next
== NULL
)
3380 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3381 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3382 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3386 struct stab_section_list
*stabsect
;
3388 DBX_SYMCOUNT (objfile
) = 0;
3389 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3391 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3392 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3395 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3397 symbuf_sections
= stabsects
->next
;
3398 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3402 dbx_symfile_read (objfile
, 0);
3405 /* Scan and build partial symbols for an ELF symbol file.
3406 This ELF file has already been processed to get its minimal symbols.
3408 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3411 OBJFILE is the object file we are reading symbols from.
3412 ADDR is the address relative to which the symbols are (e.g.
3413 the base address of the text segment).
3414 STABSECT is the BFD section information for the .stab section.
3415 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3416 .stabstr section exists.
3418 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3419 adjusted for elf details. */
3422 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3423 file_ptr stabstroffset
, unsigned int stabstrsize
)
3426 bfd
*sym_bfd
= objfile
->obfd
;
3427 char *name
= bfd_get_filename (sym_bfd
);
3428 struct dbx_symfile_info
*info
;
3429 struct cleanup
*back_to
= NULL
;
3431 /* There is already a dbx_symfile_info allocated by our caller.
3432 It might even contain some info from the ELF symtab to help us. */
3433 info
= objfile
->deprecated_sym_stab_info
;
3435 /* Find the first and last text address. dbx_symfile_read seems to
3437 find_text_range (sym_bfd
, objfile
);
3439 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3440 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3441 DBX_SYMCOUNT (objfile
)
3442 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3443 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3444 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3445 DBX_STAB_SECTION (objfile
) = stabsect
;
3447 if (stabstrsize
> bfd_get_size (sym_bfd
))
3448 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3449 DBX_STRINGTAB (objfile
) = (char *)
3450 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3451 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3453 /* Now read in the string table in one big gulp. */
3455 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3457 perror_with_name (name
);
3458 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3459 if (val
!= stabstrsize
)
3460 perror_with_name (name
);
3462 stabsread_new_init ();
3463 buildsym_new_init ();
3464 free_header_files ();
3465 init_header_files ();
3467 processing_acc_compilation
= 1;
3470 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3471 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3473 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3475 /* In an elf file, we've already installed the minimal symbols that came
3476 from the elf (non-stab) symbol table, so always act like an
3477 incremental load here. dbx_symfile_read should not generate any new
3478 minimal symbols, since we will have already read the ELF dynamic symbol
3479 table and normal symbol entries won't be in the ".stab" section; but in
3480 case it does, it will install them itself. */
3481 dbx_symfile_read (objfile
, 0);
3484 do_cleanups (back_to
);
3487 /* Scan and build partial symbols for a file with special sections for stabs
3488 and stabstrings. The file has already been processed to get its minimal
3489 symbols, and any other symbols that might be necessary to resolve GSYMs.
3491 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3494 OBJFILE is the object file we are reading symbols from.
3495 ADDR is the address relative to which the symbols are (e.g. the base address
3496 of the text segment).
3497 STAB_NAME is the name of the section that contains the stabs.
3498 STABSTR_NAME is the name of the section that contains the stab strings.
3500 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3503 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3504 char *stabstr_name
, char *text_name
)
3507 bfd
*sym_bfd
= objfile
->obfd
;
3508 char *name
= bfd_get_filename (sym_bfd
);
3510 asection
*stabstrsect
;
3511 asection
*text_sect
;
3513 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3514 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3520 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string \
3522 stab_name
, stabstr_name
);
3524 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3525 xmalloc (sizeof (struct dbx_symfile_info
));
3526 memset (objfile
->deprecated_sym_stab_info
, 0,
3527 sizeof (struct dbx_symfile_info
));
3529 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3531 error (_("Can't find %s section in symbol file"), text_name
);
3532 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3533 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3535 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3536 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3537 / DBX_SYMBOL_SIZE (objfile
);
3538 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3539 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3541 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3542 error (_("ridiculous string table size: %d bytes"),
3543 DBX_STRINGTAB_SIZE (objfile
));
3544 DBX_STRINGTAB (objfile
) = (char *)
3545 obstack_alloc (&objfile
->objfile_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3546 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3548 /* Now read in the string table in one big gulp. */
3550 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3551 stabstrsect
, /* bfd section */
3552 DBX_STRINGTAB (objfile
), /* input buffer */
3553 0, /* offset into section */
3554 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3557 perror_with_name (name
);
3559 stabsread_new_init ();
3560 buildsym_new_init ();
3561 free_header_files ();
3562 init_header_files ();
3564 /* Now, do an incremental load */
3566 processing_acc_compilation
= 1;
3567 dbx_symfile_read (objfile
, 0);
3570 static struct sym_fns aout_sym_fns
=
3572 bfd_target_aout_flavour
,
3573 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3574 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3575 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3576 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3577 default_symfile_offsets
, /* sym_offsets: parse user's offsets to
3579 default_symfile_segments
, /* sym_segments: Get segment information from
3581 NULL
, /* sym_read_linetable */
3582 NULL
/* next: pointer to next struct sym_fns */
3586 _initialize_dbxread (void)
3588 add_symtab_fns (&aout_sym_fns
);