1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
40 #if defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
45 #include "gdb_obstack.h"
48 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
54 #include "stabsread.h"
55 #include "gdb-stabs.h"
57 #include "complaints.h"
60 #include "gdb_assert.h"
61 #include "gdb_string.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* Remember what we deduced to be the source language of this psymtab. */
108 static enum language psymtab_language
= language_unknown
;
110 /* The BFD for this file -- implicit parameter to next_symbol_text. */
112 static bfd
*symfile_bfd
;
114 /* The size of each symbol in the symbol file (in external form).
115 This is set by dbx_symfile_read when building psymtabs, and by
116 dbx_psymtab_to_symtab when building symtabs. */
118 static unsigned symbol_size
;
120 /* This is the offset of the symbol table in the executable file. */
122 static unsigned symbol_table_offset
;
124 /* This is the offset of the string table in the executable file. */
126 static unsigned string_table_offset
;
128 /* For elf+stab executables, the n_strx field is not a simple index
129 into the string table. Instead, each .o file has a base offset in
130 the string table, and the associated symbols contain offsets from
131 this base. The following two variables contain the base offset for
132 the current and next .o files. */
134 static unsigned int file_string_table_offset
;
135 static unsigned int next_file_string_table_offset
;
137 /* .o and NLM files contain unrelocated addresses which are based at
138 0. When non-zero, this flag disables some of the special cases for
139 Solaris elf+stab text addresses at location 0. */
141 static int symfile_relocatable
= 0;
143 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
144 relative to the function start address. */
146 static int block_address_function_relative
= 0;
148 /* The lowest text address we have yet encountered. This is needed
149 because in an a.out file, there is no header field which tells us
150 what address the program is actually going to be loaded at, so we
151 need to make guesses based on the symbols (which *are* relocated to
152 reflect the address it will be loaded at). */
154 static CORE_ADDR lowest_text_address
;
156 /* Non-zero if there is any line number info in the objfile. Prevents
157 end_psymtab from discarding an otherwise empty psymtab. */
159 static int has_line_numbers
;
161 /* Complaints about the symbols we have encountered. */
164 unknown_symtype_complaint (const char *arg1
)
166 complaint (&symfile_complaints
, "unknown symbol type %s", arg1
);
170 lbrac_mismatch_complaint (int arg1
)
172 complaint (&symfile_complaints
,
173 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1
);
177 repeated_header_complaint (const char *arg1
, int arg2
)
179 complaint (&symfile_complaints
,
180 "\"repeated\" header file %s not previously seen, at symtab pos %d",
184 /* find_text_range --- find start and end of loadable code sections
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
194 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
201 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
202 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
204 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
205 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
209 if (sec_start
< start
)
224 error ("Can't find any code sections in symbol file");
226 DBX_TEXT_ADDR (objfile
) = start
;
227 DBX_TEXT_SIZE (objfile
) = end
- start
;
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
237 struct header_file_location
239 char *name
; /* Name of header file */
240 int instance
; /* See above */
241 struct partial_symtab
*pst
; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
245 /* The actual list and controling variables */
246 static struct header_file_location
*bincl_list
, *next_bincl
;
247 static int bincls_allocated
;
249 /* Local function prototypes */
251 extern void _initialize_dbxread (void);
253 static void read_ofile_symtab (struct partial_symtab
*);
255 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
259 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
261 static void read_dbx_symtab (struct objfile
*);
263 static void free_bincl_list (struct objfile
*);
265 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
269 static void init_bincl_list (int, struct objfile
*);
271 static char *dbx_next_symbol_text (struct objfile
*);
273 static void fill_symbuf (bfd
*);
275 static void dbx_symfile_init (struct objfile
*);
277 static void dbx_new_init (struct objfile
*);
279 static void dbx_symfile_read (struct objfile
*, int);
281 static void dbx_symfile_finish (struct objfile
*);
283 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
285 static void add_new_header_file (char *, int);
287 static void add_old_header_file (char *, int);
289 static void add_this_object_header_file (int);
291 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
293 struct partial_symbol
**,
294 struct partial_symbol
**);
296 /* Free up old header file tables */
299 free_header_files (void)
301 if (this_object_header_files
)
303 xfree (this_object_header_files
);
304 this_object_header_files
= NULL
;
306 n_allocated_this_object_header_files
= 0;
309 /* Allocate new header file tables */
312 init_header_files (void)
314 n_allocated_this_object_header_files
= 10;
315 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
322 add_this_object_header_file (int i
)
324 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
326 n_allocated_this_object_header_files
*= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files
,
329 n_allocated_this_object_header_files
* sizeof (int));
332 this_object_header_files
[n_this_object_header_files
++] = i
;
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
341 add_old_header_file (char *name
, int instance
)
343 struct header_file
*p
= HEADER_FILES (current_objfile
);
346 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
347 if (strcmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
349 add_this_object_header_file (i
);
352 repeated_header_complaint (name
, symnum
);
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
367 add_new_header_file (char *name
, int instance
)
370 struct header_file
*hfile
;
372 /* Make sure there is room for one more header file. */
374 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
376 if (N_HEADER_FILES (current_objfile
) == i
)
380 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
381 HEADER_FILES (current_objfile
) = (struct header_file
*)
382 xmalloc (10 * sizeof (struct header_file
));
387 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
388 HEADER_FILES (current_objfile
) = (struct header_file
*)
389 xrealloc ((char *) HEADER_FILES (current_objfile
),
390 (i
* sizeof (struct header_file
)));
394 /* Create an entry for this header file. */
396 i
= N_HEADER_FILES (current_objfile
)++;
397 hfile
= HEADER_FILES (current_objfile
) + i
;
398 hfile
->name
= savestring (name
, strlen (name
));
399 hfile
->instance
= instance
;
402 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
403 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
405 add_this_object_header_file (i
);
409 static struct type
**
410 explicit_lookup_type (int real_filenum
, int index
)
412 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
414 if (index
>= f
->length
)
417 f
->vector
= (struct type
**)
418 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
419 memset (&f
->vector
[f
->length
/ 2],
420 '\0', f
->length
* sizeof (struct type
*) / 2);
422 return &f
->vector
[index
];
427 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
428 struct objfile
*objfile
)
430 enum minimal_symbol_type ms_type
;
432 asection
*bfd_section
;
438 section
= SECT_OFF_TEXT (objfile
);
439 bfd_section
= DBX_TEXT_SECTION (objfile
);
443 section
= SECT_OFF_DATA (objfile
);
444 bfd_section
= DBX_DATA_SECTION (objfile
);
448 section
= SECT_OFF_BSS (objfile
);
449 bfd_section
= DBX_BSS_SECTION (objfile
);
459 section
= SECT_OFF_DATA (objfile
);
460 bfd_section
= DBX_DATA_SECTION (objfile
);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type
= mst_file_data
;
467 section
= SECT_OFF_DATA (objfile
);
468 bfd_section
= DBX_DATA_SECTION (objfile
);
475 ms_type
= mst_file_text
;
476 section
= SECT_OFF_TEXT (objfile
);
477 bfd_section
= DBX_TEXT_SECTION (objfile
);
480 ms_type
= mst_file_data
;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name
[8] == 'C' && 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
, NULL
, section
, bfd_section
, objfile
);
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
529 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
533 struct cleanup
*back_to
;
535 sym_bfd
= objfile
->obfd
;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative
=
548 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
555 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
557 perror_with_name (objfile
->name
);
559 /* If we are reinitializing, or if we have never loaded syms yet, init */
561 || (objfile
->global_psymbols
.size
== 0
562 && objfile
->static_psymbols
.size
== 0))
563 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
565 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
566 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
568 free_pending_blocks ();
569 back_to
= make_cleanup (really_free_pendings
, 0);
571 init_minimal_symbol_collection ();
572 make_cleanup_discard_minimal_symbols ();
574 /* Read stabs data from executable file and define symbols. */
576 read_dbx_symtab (objfile
);
578 /* Add the dynamic symbols. */
580 read_dbx_dynamic_symtab (objfile
);
582 /* Install any minimal symbols that have been collected as the current
583 minimal symbols for this objfile. */
585 install_minimal_symbols (objfile
);
587 do_cleanups (back_to
);
590 /* Initialize anything that needs initializing when a completely new
591 symbol file is specified (not just adding some symbols from another
592 file, e.g. a shared library). */
595 dbx_new_init (struct objfile
*ignore
)
597 stabsread_new_init ();
598 buildsym_new_init ();
599 init_header_files ();
603 /* dbx_symfile_init ()
604 is the dbx-specific initialization routine for reading symbols.
605 It is passed a struct objfile which contains, among other things,
606 the BFD for the file whose symbols are being read, and a slot for a pointer
607 to "private data" which we fill with goodies.
609 We read the string table into malloc'd space and stash a pointer to it.
611 Since BFD doesn't know how to read debug symbols in a format-independent
612 way (and may never do so...), we have to do it ourselves. We will never
613 be called unless this is an a.out (or very similar) file.
614 FIXME, there should be a cleaner peephole into the BFD environment here. */
616 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
619 dbx_symfile_init (struct objfile
*objfile
)
622 bfd
*sym_bfd
= objfile
->obfd
;
623 char *name
= bfd_get_filename (sym_bfd
);
625 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
627 /* Allocate struct to keep track of the symfile */
628 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
629 xmalloc (sizeof (struct dbx_symfile_info
));
630 memset (objfile
->deprecated_sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
632 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
633 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
634 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
636 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
637 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
638 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
640 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
642 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
644 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
646 error ("Can't find .text section in symbol file");
647 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
648 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
650 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
651 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
652 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
654 /* Read the string table and stash it away in the objfile_obstack.
655 When we blow away the objfile the string table goes away as well.
656 Note that gdb used to use the results of attempting to malloc the
657 string table, based on the size it read, as a form of sanity check
658 for botched byte swapping, on the theory that a byte swapped string
659 table size would be so totally bogus that the malloc would fail. Now
660 that we put in on the objfile_obstack, we can't do this since gdb gets
661 a fatal error (out of virtual memory) if the size is bogus. We can
662 however at least check to see if the size is less than the size of
663 the size field itself, or larger than the size of the entire file.
664 Note that all valid string tables have a size greater than zero, since
665 the bytes used to hold the size are included in the count. */
667 if (STRING_TABLE_OFFSET
== 0)
669 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
670 will never be zero, even when there is no string table. This
671 would appear to be a bug in bfd. */
672 DBX_STRINGTAB_SIZE (objfile
) = 0;
673 DBX_STRINGTAB (objfile
) = NULL
;
677 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
679 perror_with_name (name
);
681 memset (size_temp
, 0, sizeof (size_temp
));
682 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
685 perror_with_name (name
);
689 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
690 EOF if there is no string table, and attempting to read the size
691 from EOF will read zero bytes. */
692 DBX_STRINGTAB_SIZE (objfile
) = 0;
693 DBX_STRINGTAB (objfile
) = NULL
;
697 /* Read some data that would appear to be the string table size.
698 If there really is a string table, then it is probably the right
699 size. Byteswap if necessary and validate the size. Note that
700 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
701 random data that happened to be at STRING_TABLE_OFFSET, because
702 bfd can't tell us there is no string table, the sanity checks may
703 or may not catch this. */
704 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
706 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
707 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
708 error ("ridiculous string table size (%d bytes).",
709 DBX_STRINGTAB_SIZE (objfile
));
711 DBX_STRINGTAB (objfile
) =
712 (char *) obstack_alloc (&objfile
->objfile_obstack
,
713 DBX_STRINGTAB_SIZE (objfile
));
714 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
716 /* Now read in the string table in one big gulp. */
718 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
720 perror_with_name (name
);
721 val
= bfd_bread (DBX_STRINGTAB (objfile
),
722 DBX_STRINGTAB_SIZE (objfile
),
724 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
725 perror_with_name (name
);
730 /* Perform any local cleanups required when we are done with a particular
731 objfile. I.E, we are in the process of discarding all symbol information
732 for an objfile, freeing up all memory held for it, and unlinking the
733 objfile struct from the global list of known objfiles. */
736 dbx_symfile_finish (struct objfile
*objfile
)
738 if (objfile
->deprecated_sym_stab_info
!= NULL
)
740 if (HEADER_FILES (objfile
) != NULL
)
742 int i
= N_HEADER_FILES (objfile
);
743 struct header_file
*hfiles
= HEADER_FILES (objfile
);
747 xfree (hfiles
[i
].name
);
748 xfree (hfiles
[i
].vector
);
752 xfree (objfile
->deprecated_sym_stab_info
);
754 free_header_files ();
758 /* Buffer for reading the symbol table entries. */
759 static struct external_nlist symbuf
[4096];
760 static int symbuf_idx
;
761 static int symbuf_end
;
763 /* Name of last function encountered. Used in Solaris to approximate
764 object file boundaries. */
765 static char *last_function_name
;
767 /* The address in memory of the string table of the object file we are
768 reading (which might not be the "main" object file, but might be a
769 shared library or some other dynamically loaded thing). This is
770 set by read_dbx_symtab when building psymtabs, and by
771 read_ofile_symtab when building symtabs, and is used only by
772 next_symbol_text. FIXME: If that is true, we don't need it when
773 building psymtabs, right? */
774 static char *stringtab_global
;
776 /* These variables are used to control fill_symbuf when the stabs
777 symbols are not contiguous (as may be the case when a COFF file is
778 linked using --split-by-reloc). */
779 static struct stab_section_list
*symbuf_sections
;
780 static unsigned int symbuf_left
;
781 static unsigned int symbuf_read
;
783 /* This variable stores a global stabs buffer, if we read stabs into
784 memory in one chunk in order to process relocations. */
785 static bfd_byte
*stabs_data
;
787 /* Refill the symbol table input buffer
788 and set the variables that control fetching entries from it.
789 Reports an error if no data available.
790 This function can read past the end of the symbol table
791 (into the string table) but this does no harm. */
794 fill_symbuf (bfd
*sym_bfd
)
801 nbytes
= sizeof (symbuf
);
802 if (nbytes
> symbuf_left
)
803 nbytes
= symbuf_left
;
804 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
806 else if (symbuf_sections
== NULL
)
808 count
= sizeof (symbuf
);
809 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
813 if (symbuf_left
<= 0)
815 file_ptr filepos
= symbuf_sections
->section
->filepos
;
816 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
817 perror_with_name (bfd_get_filename (sym_bfd
));
818 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
819 symbol_table_offset
= filepos
- symbuf_read
;
820 symbuf_sections
= symbuf_sections
->next
;
824 if (count
> sizeof (symbuf
))
825 count
= sizeof (symbuf
);
826 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
830 perror_with_name (bfd_get_filename (sym_bfd
));
831 else if (nbytes
== 0)
832 error ("Premature end of file reading symbol table");
833 symbuf_end
= nbytes
/ symbol_size
;
835 symbuf_left
-= nbytes
;
836 symbuf_read
+= nbytes
;
840 stabs_seek (int sym_offset
)
844 symbuf_read
+= sym_offset
;
845 symbuf_left
-= sym_offset
;
848 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
851 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
853 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
856 if (bfd_get_sign_extend_vma (abfd)) \
857 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
859 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
862 /* Invariant: The symbol pointed to by symbuf_idx is the first one
863 that hasn't been swapped. Swap the symbol at the same time
864 that symbuf_idx is incremented. */
866 /* dbx allows the text of a symbol name to be continued into the
867 next symbol name! When such a continuation is encountered
868 (a \ at the end of the text of a name)
869 call this function to get the continuation. */
872 dbx_next_symbol_text (struct objfile
*objfile
)
874 struct internal_nlist nlist
;
876 if (symbuf_idx
== symbuf_end
)
877 fill_symbuf (symfile_bfd
);
880 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
881 OBJSTAT (objfile
, n_stabs
++);
885 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
888 /* Initialize the list of bincls to contain none and have some
892 init_bincl_list (int number
, struct objfile
*objfile
)
894 bincls_allocated
= number
;
895 next_bincl
= bincl_list
= (struct header_file_location
*)
896 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
, struct internal_nlist nlist
)
966 if (((unsigned) nlist
.n_strx
+ file_string_table_offset
) >=
967 DBX_STRINGTAB_SIZE (objfile
))
969 complaint (&symfile_complaints
, "bad string table offset in symbol %d",
971 namestring
= "<bad string table offset>";
974 namestring
= nlist
.n_strx
+ file_string_table_offset
+
975 DBX_STRINGTAB (objfile
);
979 /* Scan a SunOs dynamic symbol table for symbols of interest and
980 add them to the minimal symbol table. */
983 read_dbx_dynamic_symtab (struct objfile
*objfile
)
985 bfd
*abfd
= objfile
->obfd
;
986 struct cleanup
*back_to
;
999 /* Check that the symbol file has dynamic symbols that we know about.
1000 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1001 on a sun4 host (and vice versa) and bfd is not configured
1002 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1003 so we ignore the dynamic symbols in this case. */
1004 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1005 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1006 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1009 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1010 if (dynsym_size
< 0)
1013 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1014 back_to
= make_cleanup (xfree
, dynsyms
);
1016 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1017 if (dynsym_count
< 0)
1019 do_cleanups (back_to
);
1023 /* Enter dynamic symbols into the minimal symbol table
1024 if this is a stripped executable. */
1025 if (bfd_get_symcount (abfd
) <= 0)
1028 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1030 asymbol
*sym
= *symptr
;
1034 sec
= bfd_get_section (sym
);
1036 /* BFD symbols are section relative. */
1037 sym_value
= sym
->value
+ sec
->vma
;
1039 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1041 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1044 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1046 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1049 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1051 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1057 if (sym
->flags
& BSF_GLOBAL
)
1060 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1065 /* Symbols from shared libraries have a dynamic relocation entry
1066 that points to the associated slot in the procedure linkage table.
1067 We make a mininal symbol table entry with type mst_solib_trampoline
1068 at the address in the procedure linkage table. */
1069 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1070 if (dynrel_size
< 0)
1072 do_cleanups (back_to
);
1076 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1077 make_cleanup (xfree
, dynrels
);
1079 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1080 if (dynrel_count
< 0)
1082 do_cleanups (back_to
);
1086 for (counter
= 0, relptr
= dynrels
;
1087 counter
< dynrel_count
;
1088 counter
++, relptr
++)
1090 arelent
*rel
= *relptr
;
1092 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1094 switch (bfd_get_arch (abfd
))
1096 case bfd_arch_sparc
:
1097 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1101 /* `16' is the type BFD produces for a jump table relocation. */
1102 if (rel
->howto
->type
!= 16)
1105 /* Adjust address in the jump table to point to
1106 the start of the bsr instruction. */
1113 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1114 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1118 do_cleanups (back_to
);
1121 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1123 find_stab_function_addr (char *namestring
, char *filename
,
1124 struct objfile
*objfile
)
1126 struct minimal_symbol
*msym
;
1130 p
= strchr (namestring
, ':');
1135 strncpy (p
, namestring
, n
);
1138 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1141 /* Sun Fortran appends an underscore to the minimal symbol name,
1142 try again with an appended underscore if the minimal symbol
1146 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1149 if (msym
== NULL
&& filename
!= NULL
)
1151 /* Try again without the filename. */
1153 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1155 if (msym
== NULL
&& filename
!= NULL
)
1157 /* And try again for Sun Fortran, but without the filename. */
1160 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1163 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1165 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1168 function_outside_compilation_unit_complaint (const char *arg1
)
1170 complaint (&symfile_complaints
,
1171 "function `%s' appears to be defined outside of all compilation units",
1175 /* Setup partial_symtab's describing each source file for which
1176 debugging information is available. */
1179 read_dbx_symtab (struct objfile
*objfile
)
1181 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1182 struct internal_nlist nlist
;
1183 CORE_ADDR text_addr
;
1188 int past_first_source_file
= 0;
1189 CORE_ADDR last_o_file_start
= 0;
1190 CORE_ADDR last_function_start
= 0;
1191 struct cleanup
*back_to
;
1193 int textlow_not_set
;
1194 int data_sect_index
;
1196 /* Current partial symtab */
1197 struct partial_symtab
*pst
;
1199 /* List of current psymtab's include files */
1200 char **psymtab_include_list
;
1201 int includes_allocated
;
1204 /* Index within current psymtab dependency list */
1205 struct partial_symtab
**dependency_list
;
1206 int dependencies_used
, dependencies_allocated
;
1208 text_addr
= DBX_TEXT_ADDR (objfile
);
1209 text_size
= DBX_TEXT_SIZE (objfile
);
1211 /* FIXME. We probably want to change stringtab_global rather than add this
1212 while processing every symbol entry. FIXME. */
1213 file_string_table_offset
= 0;
1214 next_file_string_table_offset
= 0;
1216 stringtab_global
= DBX_STRINGTAB (objfile
);
1218 pst
= (struct partial_symtab
*) 0;
1220 includes_allocated
= 30;
1222 psymtab_include_list
= (char **) alloca (includes_allocated
*
1225 dependencies_allocated
= 30;
1226 dependencies_used
= 0;
1228 (struct partial_symtab
**) alloca (dependencies_allocated
*
1229 sizeof (struct partial_symtab
*));
1231 /* Init bincl list */
1232 init_bincl_list (20, objfile
);
1233 back_to
= make_cleanup_free_bincl_list (objfile
);
1235 last_source_file
= NULL
;
1237 lowest_text_address
= (CORE_ADDR
) -1;
1239 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1240 abfd
= objfile
->obfd
;
1241 symbuf_end
= symbuf_idx
= 0;
1242 next_symbol_text_func
= dbx_next_symbol_text
;
1243 textlow_not_set
= 1;
1244 has_line_numbers
= 0;
1246 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1247 to global and static variables. The stab for a global or static
1248 variable doesn't give us any indication of which section it's in,
1249 so we can't tell immediately which offset in
1250 objfile->section_offsets we should apply to the variable's
1253 We could certainly find out which section contains the variable
1254 by looking up the variable's unrelocated address with
1255 find_pc_section, but that would be expensive; this is the
1256 function that constructs the partial symbol tables by examining
1257 every symbol in the entire executable, and it's
1258 performance-critical. So that expense would not be welcome. I'm
1259 not sure what to do about this at the moment.
1261 What we have done for years is to simply assume that the .data
1262 section's offset is appropriate for all global and static
1263 variables. Recently, this was expanded to fall back to the .bss
1264 section's offset if there is no .data section, and then to the
1265 .rodata section's offset. */
1266 data_sect_index
= objfile
->sect_index_data
;
1267 if (data_sect_index
== -1)
1268 data_sect_index
= SECT_OFF_BSS (objfile
);
1269 if (data_sect_index
== -1)
1270 data_sect_index
= SECT_OFF_RODATA (objfile
);
1272 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1273 for the file to have no .data, no .bss, and no .text at all, if
1274 it also has no global or static variables. If it does, we will
1275 get an internal error from an ANOFFSET macro below when we try to
1276 use data_sect_index. */
1278 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1280 /* Get the symbol for this run and pull out some info */
1281 QUIT
; /* allow this to be interruptable */
1282 if (symbuf_idx
== symbuf_end
)
1284 bufp
= &symbuf
[symbuf_idx
++];
1287 * Special case to speed up readin.
1289 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1291 has_line_numbers
= 1;
1295 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1296 OBJSTAT (objfile
, n_stabs
++);
1298 /* Ok. There is a lot of code duplicated in the rest of this
1299 switch statement (for efficiency reasons). Since I don't
1300 like duplicating code, I will do my penance here, and
1301 describe the code which is duplicated:
1303 *) The assignment to namestring.
1304 *) The call to strchr.
1305 *) The addition of a partial symbol the the two partial
1306 symbol lists. This last is a large section of code, so
1307 I've imbedded it in the following macro.
1310 switch (nlist
.n_type
)
1314 * Standard, external, non-debugger, symbols
1317 case N_TEXT
| N_EXT
:
1318 case N_NBTEXT
| N_EXT
:
1319 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1322 case N_DATA
| N_EXT
:
1323 case N_NBDATA
| N_EXT
:
1324 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1329 case N_NBBSS
| N_EXT
:
1330 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1331 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1336 namestring
= set_namestring (objfile
, nlist
);
1339 record_minimal_symbol (namestring
, nlist
.n_value
,
1340 nlist
.n_type
, objfile
); /* Always */
1343 /* Standard, local, non-debugger, symbols */
1347 /* We need to be able to deal with both N_FN or N_TEXT,
1348 because we have no way of knowing whether the sys-supplied ld
1349 or GNU ld was used to make the executable. Sequents throw
1350 in another wrinkle -- they renumbered N_FN. */
1355 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1356 namestring
= set_namestring (objfile
, nlist
);
1358 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1359 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1360 && namestring
[nsl
- 2] == '.'))
1362 if (past_first_source_file
&& pst
1363 /* The gould NP1 uses low values for .o and -l symbols
1364 which are not the address. */
1365 && nlist
.n_value
>= pst
->textlow
)
1367 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1368 symnum
* symbol_size
,
1369 nlist
.n_value
> pst
->texthigh
1370 ? nlist
.n_value
: pst
->texthigh
,
1371 dependency_list
, dependencies_used
, textlow_not_set
);
1372 pst
= (struct partial_symtab
*) 0;
1374 dependencies_used
= 0;
1377 past_first_source_file
= 1;
1378 last_o_file_start
= nlist
.n_value
;
1385 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1388 case N_UNDF
| N_EXT
:
1389 if (nlist
.n_value
!= 0)
1391 /* This is a "Fortran COMMON" symbol. See if the target
1392 environment knows where it has been relocated to. */
1396 namestring
= set_namestring (objfile
, nlist
);
1397 if (target_lookup_symbol (namestring
, &reladdr
))
1399 continue; /* Error in lookup; ignore symbol for now. */
1401 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1402 nlist
.n_value
= reladdr
;
1403 goto bss_ext_symbol
;
1405 continue; /* Just undefined, not COMMON */
1408 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1410 /* Deal with relative offsets in the string table
1411 used in ELF+STAB under Solaris. If we want to use the
1412 n_strx field, which contains the name of the file,
1413 we must adjust file_string_table_offset *before* calling
1414 set_namestring(). */
1415 past_first_source_file
= 1;
1416 file_string_table_offset
= next_file_string_table_offset
;
1417 next_file_string_table_offset
=
1418 file_string_table_offset
+ nlist
.n_value
;
1419 if (next_file_string_table_offset
< file_string_table_offset
)
1420 error ("string table offset backs up at %d", symnum
);
1421 /* FIXME -- replace error() with complaint. */
1426 /* Lots of symbol types we can just ignore. */
1433 /* Keep going . . . */
1436 * Special symbol types for GNU
1439 case N_INDR
| N_EXT
:
1441 case N_SETA
| N_EXT
:
1443 case N_SETT
| N_EXT
:
1445 case N_SETD
| N_EXT
:
1447 case N_SETB
| N_EXT
:
1458 static int prev_so_symnum
= -10;
1459 static int first_so_symnum
;
1461 static char *dirname_nso
;
1462 int prev_textlow_not_set
;
1464 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1466 prev_textlow_not_set
= textlow_not_set
;
1468 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1469 /* A zero value is probably an indication for the SunPRO 3.0
1470 compiler. end_psymtab explicitly tests for zero, so
1471 don't relocate it. */
1473 if (nlist
.n_value
== 0)
1475 textlow_not_set
= 1;
1479 textlow_not_set
= 0;
1481 textlow_not_set
= 0;
1483 past_first_source_file
= 1;
1485 if (prev_so_symnum
!= symnum
- 1)
1486 { /* Here if prev stab wasn't N_SO */
1487 first_so_symnum
= symnum
;
1491 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1492 symnum
* symbol_size
,
1493 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1494 dependency_list
, dependencies_used
,
1495 prev_textlow_not_set
);
1496 pst
= (struct partial_symtab
*) 0;
1498 dependencies_used
= 0;
1502 prev_so_symnum
= symnum
;
1504 /* End the current partial symtab and start a new one */
1506 namestring
= set_namestring (objfile
, nlist
);
1508 /* Null name means end of .o file. Don't start a new one. */
1509 if (*namestring
== '\000')
1512 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1513 The first one is a directory name; the second the file name.
1514 If pst exists, is empty, and has a filename ending in '/',
1515 we assume the previous N_SO was a directory name. */
1517 p
= strrchr (namestring
, '/');
1518 if (p
&& *(p
+ 1) == '\000')
1520 /* Save the directory name SOs locally, then save it into
1521 the psymtab when it's created below. */
1522 dirname_nso
= namestring
;
1526 /* Some other compilers (C++ ones in particular) emit useless
1527 SOs for non-existant .c files. We ignore all subsequent SOs that
1528 immediately follow the first. */
1532 pst
= start_psymtab (objfile
,
1534 first_so_symnum
* symbol_size
,
1535 objfile
->global_psymbols
.next
,
1536 objfile
->static_psymbols
.next
);
1537 pst
->dirname
= dirname_nso
;
1545 enum language tmp_language
;
1546 /* Add this bincl to the bincl_list for future EXCLs. No
1547 need to save the string; it'll be around until
1548 read_dbx_symtab function returns */
1550 namestring
= set_namestring (objfile
, nlist
);
1551 tmp_language
= deduce_language_from_filename (namestring
);
1553 /* Only change the psymtab's language if we've learned
1554 something useful (eg. tmp_language is not language_unknown).
1555 In addition, to match what start_subfile does, never change
1557 if (tmp_language
!= language_unknown
1558 && (tmp_language
!= language_c
1559 || psymtab_language
!= language_cplus
))
1560 psymtab_language
= tmp_language
;
1564 /* FIXME: we should not get here without a PST to work on.
1565 Attempt to recover. */
1566 complaint (&symfile_complaints
,
1567 "N_BINCL %s not in entries for any file, at symtab pos %d",
1568 namestring
, symnum
);
1571 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1573 /* Mark down an include file in the current psymtab */
1575 goto record_include_file
;
1580 enum language tmp_language
;
1581 /* Mark down an include file in the current psymtab */
1583 namestring
= set_namestring (objfile
, nlist
);
1584 tmp_language
= deduce_language_from_filename (namestring
);
1586 /* Only change the psymtab's language if we've learned
1587 something useful (eg. tmp_language is not language_unknown).
1588 In addition, to match what start_subfile does, never change
1590 if (tmp_language
!= language_unknown
1591 && (tmp_language
!= language_c
1592 || psymtab_language
!= language_cplus
))
1593 psymtab_language
= tmp_language
;
1595 /* In C++, one may expect the same filename to come round many
1596 times, when code is coming alternately from the main file
1597 and from inline functions in other files. So I check to see
1598 if this is a file we've seen before -- either the main
1599 source file, or a previously included file.
1601 This seems to be a lot of time to be spending on N_SOL, but
1602 things like "break c-exp.y:435" need to work (I
1603 suppose the psymtab_include_list could be hashed or put
1604 in a binary tree, if profiling shows this is a major hog). */
1605 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1609 for (i
= 0; i
< includes_used
; i
++)
1610 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1619 record_include_file
:
1621 psymtab_include_list
[includes_used
++] = namestring
;
1622 if (includes_used
>= includes_allocated
)
1624 char **orig
= psymtab_include_list
;
1626 psymtab_include_list
= (char **)
1627 alloca ((includes_allocated
*= 2) *
1629 memcpy (psymtab_include_list
, orig
,
1630 includes_used
* sizeof (char *));
1634 case N_LSYM
: /* Typedef or automatic variable. */
1635 case N_STSYM
: /* Data seg var -- static */
1636 case N_LCSYM
: /* BSS " */
1637 case N_ROSYM
: /* Read-only data seg var -- static. */
1638 case N_NBSTS
: /* Gould nobase. */
1639 case N_NBLCS
: /* symbols. */
1641 case N_GSYM
: /* Global (extern) variable; can be
1642 data or bss (sigh FIXME). */
1644 /* Following may probably be ignored; I'll leave them here
1645 for now (until I do Pascal and Modula 2 extensions). */
1647 case N_PC
: /* I may or may not need this; I
1649 case N_M2C
: /* I suspect that I can ignore this here. */
1650 case N_SCOPE
: /* Same. */
1652 namestring
= set_namestring (objfile
, nlist
);
1654 /* See if this is an end of function stab. */
1655 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1659 /* It's value is the size (in bytes) of the function for
1660 function relative stabs, or the address of the function's
1661 end for old style stabs. */
1662 valu
= nlist
.n_value
+ last_function_start
;
1663 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1664 pst
->texthigh
= valu
;
1668 p
= (char *) strchr (namestring
, ':');
1670 continue; /* Not a debugging symbol. */
1674 /* Main processing section for debugging symbols which
1675 the initial read through the symbol tables needs to worry
1676 about. If we reach this point, the symbol which we are
1677 considering is definitely one we are interested in.
1678 p must also contain the (valid) index into the namestring
1679 which indicates the debugging type symbol. */
1684 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1685 #ifdef STATIC_TRANSFORM_NAME
1686 namestring
= STATIC_TRANSFORM_NAME (namestring
);
1688 add_psymbol_to_list (namestring
, p
- namestring
,
1689 VAR_DOMAIN
, LOC_STATIC
,
1690 &objfile
->static_psymbols
,
1692 psymtab_language
, objfile
);
1695 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1696 /* The addresses in these entries are reported to be
1697 wrong. See the code that reads 'G's for symtabs. */
1698 add_psymbol_to_list (namestring
, p
- namestring
,
1699 VAR_DOMAIN
, LOC_STATIC
,
1700 &objfile
->global_psymbols
,
1702 psymtab_language
, objfile
);
1706 /* When a 'T' entry is defining an anonymous enum, it
1707 may have a name which is the empty string, or a
1708 single space. Since they're not really defining a
1709 symbol, those shouldn't go in the partial symbol
1710 table. We do pick up the elements of such enums at
1711 'check_enum:', below. */
1712 if (p
>= namestring
+ 2
1713 || (p
== namestring
+ 1
1714 && namestring
[0] != ' '))
1716 add_psymbol_to_list (namestring
, p
- namestring
,
1717 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1718 &objfile
->static_psymbols
,
1720 psymtab_language
, objfile
);
1723 /* Also a typedef with the same name. */
1724 add_psymbol_to_list (namestring
, p
- namestring
,
1725 VAR_DOMAIN
, LOC_TYPEDEF
,
1726 &objfile
->static_psymbols
,
1728 psymtab_language
, objfile
);
1734 if (p
!= namestring
) /* a name is there, not just :T... */
1736 add_psymbol_to_list (namestring
, p
- namestring
,
1737 VAR_DOMAIN
, LOC_TYPEDEF
,
1738 &objfile
->static_psymbols
,
1740 psymtab_language
, objfile
);
1743 /* If this is an enumerated type, we need to
1744 add all the enum constants to the partial symbol
1745 table. This does not cover enums without names, e.g.
1746 "enum {a, b} c;" in C, but fortunately those are
1747 rare. There is no way for GDB to find those from the
1748 enum type without spending too much time on it. Thus
1749 to solve this problem, the compiler needs to put out the
1750 enum in a nameless type. GCC2 does this. */
1752 /* We are looking for something of the form
1753 <name> ":" ("t" | "T") [<number> "="] "e"
1754 {<constant> ":" <value> ","} ";". */
1756 /* Skip over the colon and the 't' or 'T'. */
1758 /* This type may be given a number. Also, numbers can come
1759 in pairs like (0,26). Skip over it. */
1760 while ((*p
>= '0' && *p
<= '9')
1761 || *p
== '(' || *p
== ',' || *p
== ')'
1767 /* The aix4 compiler emits extra crud before the members. */
1770 /* Skip over the type (?). */
1774 /* Skip over the colon. */
1778 /* We have found an enumerated type. */
1779 /* According to comments in read_enum_type
1780 a comma could end it instead of a semicolon.
1781 I don't know where that happens.
1783 while (*p
&& *p
!= ';' && *p
!= ',')
1787 /* Check for and handle cretinous dbx symbol name
1789 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1790 p
= next_symbol_text (objfile
);
1792 /* Point to the character after the name
1793 of the enum constant. */
1794 for (q
= p
; *q
&& *q
!= ':'; q
++)
1796 /* Note that the value doesn't matter for
1797 enum constants in psymtabs, just in symtabs. */
1798 add_psymbol_to_list (p
, q
- p
,
1799 VAR_DOMAIN
, LOC_CONST
,
1800 &objfile
->static_psymbols
, 0,
1801 0, psymtab_language
, objfile
);
1802 /* Point past the name. */
1804 /* Skip over the value. */
1805 while (*p
&& *p
!= ',')
1807 /* Advance past the comma. */
1814 /* Constant, e.g. from "const" in Pascal. */
1815 add_psymbol_to_list (namestring
, p
- namestring
,
1816 VAR_DOMAIN
, LOC_CONST
,
1817 &objfile
->static_psymbols
, nlist
.n_value
,
1818 0, psymtab_language
, objfile
);
1824 int name_len
= p
- namestring
;
1825 char *name
= xmalloc (name_len
+ 1);
1826 memcpy (name
, namestring
, name_len
);
1827 name
[name_len
] = '\0';
1828 function_outside_compilation_unit_complaint (name
);
1831 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1832 /* Kludges for ELF/STABS with Sun ACC */
1833 last_function_name
= namestring
;
1834 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1835 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1836 value for the bottom of the text seg in those cases. */
1837 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1838 SECT_OFF_TEXT (objfile
)))
1840 CORE_ADDR minsym_valu
=
1841 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1842 /* find_stab_function_addr will return 0 if the minimal
1843 symbol wasn't found. (Unfortunately, this might also
1844 be a valid address.) Anyway, if it *does* return 0,
1845 it is likely that the value was set correctly to begin
1847 if (minsym_valu
!= 0)
1848 nlist
.n_value
= minsym_valu
;
1850 if (pst
&& textlow_not_set
)
1852 pst
->textlow
= nlist
.n_value
;
1853 textlow_not_set
= 0;
1858 /* Keep track of the start of the last function so we
1859 can handle end of function symbols. */
1860 last_function_start
= nlist
.n_value
;
1862 /* In reordered executables this function may lie outside
1863 the bounds created by N_SO symbols. If that's the case
1864 use the address of this function as the low bound for
1865 the partial symbol table. */
1868 || (nlist
.n_value
< pst
->textlow
1870 != ANOFFSET (objfile
->section_offsets
,
1871 SECT_OFF_TEXT (objfile
))))))
1873 pst
->textlow
= nlist
.n_value
;
1874 textlow_not_set
= 0;
1876 add_psymbol_to_list (namestring
, p
- namestring
,
1877 VAR_DOMAIN
, LOC_BLOCK
,
1878 &objfile
->static_psymbols
,
1880 psymtab_language
, objfile
);
1883 /* Global functions were ignored here, but now they
1884 are put into the global psymtab like one would expect.
1885 They're also in the minimal symbol table. */
1889 int name_len
= p
- namestring
;
1890 char *name
= xmalloc (name_len
+ 1);
1891 memcpy (name
, namestring
, name_len
);
1892 name
[name_len
] = '\0';
1893 function_outside_compilation_unit_complaint (name
);
1896 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1897 /* Kludges for ELF/STABS with Sun ACC */
1898 last_function_name
= namestring
;
1899 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1900 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1901 value for the bottom of the text seg in those cases. */
1902 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1903 SECT_OFF_TEXT (objfile
)))
1905 CORE_ADDR minsym_valu
=
1906 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1907 /* find_stab_function_addr will return 0 if the minimal
1908 symbol wasn't found. (Unfortunately, this might also
1909 be a valid address.) Anyway, if it *does* return 0,
1910 it is likely that the value was set correctly to begin
1912 if (minsym_valu
!= 0)
1913 nlist
.n_value
= minsym_valu
;
1915 if (pst
&& textlow_not_set
)
1917 pst
->textlow
= nlist
.n_value
;
1918 textlow_not_set
= 0;
1923 /* Keep track of the start of the last function so we
1924 can handle end of function symbols. */
1925 last_function_start
= nlist
.n_value
;
1927 /* In reordered executables this function may lie outside
1928 the bounds created by N_SO symbols. If that's the case
1929 use the address of this function as the low bound for
1930 the partial symbol table. */
1933 || (nlist
.n_value
< pst
->textlow
1935 != ANOFFSET (objfile
->section_offsets
,
1936 SECT_OFF_TEXT (objfile
))))))
1938 pst
->textlow
= nlist
.n_value
;
1939 textlow_not_set
= 0;
1941 add_psymbol_to_list (namestring
, p
- namestring
,
1942 VAR_DOMAIN
, LOC_BLOCK
,
1943 &objfile
->global_psymbols
,
1945 psymtab_language
, objfile
);
1948 /* Two things show up here (hopefully); static symbols of
1949 local scope (static used inside braces) or extensions
1950 of structure symbols. We can ignore both. */
1964 case '#': /* for symbol identification (used in live ranges) */
1968 /* It is a C++ nested symbol. We don't need to record it
1969 (I don't think); if we try to look up foo::bar::baz,
1970 then symbols for the symtab containing foo should get
1971 read in, I think. */
1972 /* Someone says sun cc puts out symbols like
1973 /foo/baz/maclib::/usr/local/bin/maclib,
1974 which would get here with a symbol type of ':'. */
1978 /* Unexpected symbol descriptor. The second and subsequent stabs
1979 of a continued stab can show up here. The question is
1980 whether they ever can mimic a normal stab--it would be
1981 nice if not, since we certainly don't want to spend the
1982 time searching to the end of every string looking for
1985 complaint (&symfile_complaints
, "unknown symbol descriptor `%c'",
1988 /* Ignore it; perhaps it is an extension that we don't
1995 namestring
= set_namestring (objfile
, nlist
);
1997 /* Find the corresponding bincl and mark that psymtab on the
1998 psymtab dependency list */
2000 struct partial_symtab
*needed_pst
=
2001 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2003 /* If this include file was defined earlier in this file,
2005 if (needed_pst
== pst
)
2013 for (i
= 0; i
< dependencies_used
; i
++)
2014 if (dependency_list
[i
] == needed_pst
)
2020 /* If it's already in the list, skip the rest. */
2024 dependency_list
[dependencies_used
++] = needed_pst
;
2025 if (dependencies_used
>= dependencies_allocated
)
2027 struct partial_symtab
**orig
= dependency_list
;
2029 (struct partial_symtab
**)
2030 alloca ((dependencies_allocated
*= 2)
2031 * sizeof (struct partial_symtab
*));
2032 memcpy (dependency_list
, orig
,
2034 * sizeof (struct partial_symtab
*)));
2036 fprintf_unfiltered (gdb_stderr
, "Had to reallocate dependency list.\n");
2037 fprintf_unfiltered (gdb_stderr
, "New dependencies allocated: %d\n",
2038 dependencies_allocated
);
2046 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2047 /* Solaris 2 end of module, finish current partial symbol table.
2048 end_psymtab will set pst->texthigh to the proper value, which
2049 is necessary if a module compiled without debugging info
2050 follows this module. */
2053 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2054 symnum
* symbol_size
,
2056 dependency_list
, dependencies_used
, textlow_not_set
);
2057 pst
= (struct partial_symtab
*) 0;
2059 dependencies_used
= 0;
2066 HANDLE_RBRAC (nlist
.n_value
);
2072 case N_SSYM
: /* Claim: Structure or union element.
2073 Hopefully, I can ignore this. */
2074 case N_ENTRY
: /* Alternate entry point; can ignore. */
2075 case N_MAIN
: /* Can definitely ignore this. */
2076 case N_CATCH
: /* These are GNU C++ extensions */
2077 case N_EHDECL
: /* that can safely be ignored here. */
2087 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2088 case N_DEFD
: /* GNU Modula-2 */
2089 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2091 case N_OBJ
: /* useless types from Solaris */
2094 /* These symbols aren't interesting; don't worry about them */
2099 /* If we haven't found it yet, ignore it. It's probably some
2100 new type we don't know about yet. */
2101 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2106 /* If there's stuff to be cleaned up, clean it up. */
2109 /* Don't set pst->texthigh lower than it already is. */
2110 CORE_ADDR text_end
=
2111 (lowest_text_address
== (CORE_ADDR
) -1
2112 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
2113 : lowest_text_address
)
2116 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2117 symnum
* symbol_size
,
2118 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2119 dependency_list
, dependencies_used
, textlow_not_set
);
2122 do_cleanups (back_to
);
2125 /* Allocate and partially fill a partial symtab. It will be
2126 completely filled at the end of the symbol list.
2128 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2129 is the address relative to which its symbols are (incremental) or 0
2133 static struct partial_symtab
*
2134 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2135 int ldsymoff
, struct partial_symbol
**global_syms
,
2136 struct partial_symbol
**static_syms
)
2138 struct partial_symtab
*result
=
2139 start_psymtab_common (objfile
, objfile
->section_offsets
,
2140 filename
, textlow
, global_syms
, static_syms
);
2142 result
->read_symtab_private
= (char *)
2143 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2144 LDSYMOFF (result
) = ldsymoff
;
2145 result
->read_symtab
= dbx_psymtab_to_symtab
;
2146 SYMBOL_SIZE (result
) = symbol_size
;
2147 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2148 STRING_OFFSET (result
) = string_table_offset
;
2149 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2151 /* If we're handling an ELF file, drag some section-relocation info
2152 for this source file out of the ELF symbol table, to compensate for
2153 Sun brain death. This replaces the section_offsets in this psymtab,
2155 elfstab_offset_sections (objfile
, result
);
2157 /* Deduce the source language from the filename for this psymtab. */
2158 psymtab_language
= deduce_language_from_filename (filename
);
2163 /* Close off the current usage of PST.
2164 Returns PST or NULL if the partial symtab was empty and thrown away.
2166 FIXME: List variables and peculiarities of same. */
2168 struct partial_symtab
*
2169 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2170 int capping_symbol_offset
, CORE_ADDR capping_text
,
2171 struct partial_symtab
**dependency_list
, int number_dependencies
,
2172 int textlow_not_set
)
2175 struct objfile
*objfile
= pst
->objfile
;
2177 if (capping_symbol_offset
!= -1)
2178 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2179 pst
->texthigh
= capping_text
;
2181 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2182 /* Under Solaris, the N_SO symbols always have a value of 0,
2183 instead of the usual address of the .o file. Therefore,
2184 we have to do some tricks to fill in texthigh and textlow.
2185 The first trick is: if we see a static
2186 or global function, and the textlow for the current pst
2187 is not set (ie: textlow_not_set), then we use that function's
2188 address for the textlow of the pst. */
2190 /* Now, to fill in texthigh, we remember the last function seen
2191 in the .o file. Also, there's a hack in
2192 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2193 to here via the misc_info field. Therefore, we can fill in
2194 a reliable texthigh by taking the address plus size of the
2195 last function in the file. */
2197 if (pst
->texthigh
== 0 && last_function_name
)
2201 struct minimal_symbol
*minsym
;
2203 p
= strchr (last_function_name
, ':');
2205 p
= last_function_name
;
2206 n
= p
- last_function_name
;
2208 strncpy (p
, last_function_name
, n
);
2211 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2214 /* Sun Fortran appends an underscore to the minimal symbol name,
2215 try again with an appended underscore if the minimal symbol
2219 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2223 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2225 last_function_name
= NULL
;
2228 /* this test will be true if the last .o file is only data */
2229 if (textlow_not_set
)
2230 pst
->textlow
= pst
->texthigh
;
2233 struct partial_symtab
*p1
;
2235 /* If we know our own starting text address, then walk through all other
2236 psymtabs for this objfile, and if any didn't know their ending text
2237 address, set it to our starting address. Take care to not set our
2238 own ending address to our starting address, nor to set addresses on
2239 `dependency' files that have both textlow and texthigh zero. */
2241 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2243 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2245 p1
->texthigh
= pst
->textlow
;
2246 /* if this file has only data, then make textlow match texthigh */
2247 if (p1
->textlow
== 0)
2248 p1
->textlow
= p1
->texthigh
;
2253 /* End of kludge for patching Solaris textlow and texthigh. */
2254 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2256 pst
->n_global_syms
=
2257 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2258 pst
->n_static_syms
=
2259 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2261 pst
->number_of_dependencies
= number_dependencies
;
2262 if (number_dependencies
)
2264 pst
->dependencies
= (struct partial_symtab
**)
2265 obstack_alloc (&objfile
->objfile_obstack
,
2266 number_dependencies
* sizeof (struct partial_symtab
*));
2267 memcpy (pst
->dependencies
, dependency_list
,
2268 number_dependencies
* sizeof (struct partial_symtab
*));
2271 pst
->dependencies
= 0;
2273 for (i
= 0; i
< num_includes
; i
++)
2275 struct partial_symtab
*subpst
=
2276 allocate_psymtab (include_list
[i
], objfile
);
2278 /* Copy the sesction_offsets array from the main psymtab. */
2279 subpst
->section_offsets
= pst
->section_offsets
;
2280 subpst
->read_symtab_private
=
2281 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2282 sizeof (struct symloc
));
2286 subpst
->texthigh
= 0;
2288 /* We could save slight bits of space by only making one of these,
2289 shared by the entire set of include files. FIXME-someday. */
2290 subpst
->dependencies
= (struct partial_symtab
**)
2291 obstack_alloc (&objfile
->objfile_obstack
,
2292 sizeof (struct partial_symtab
*));
2293 subpst
->dependencies
[0] = pst
;
2294 subpst
->number_of_dependencies
= 1;
2296 subpst
->globals_offset
=
2297 subpst
->n_global_syms
=
2298 subpst
->statics_offset
=
2299 subpst
->n_static_syms
= 0;
2303 subpst
->read_symtab
= pst
->read_symtab
;
2306 sort_pst_symbols (pst
);
2308 /* If there is already a psymtab or symtab for a file of this name, remove it.
2309 (If there is a symtab, more drastic things also happen.)
2310 This happens in VxWorks. */
2311 free_named_symtabs (pst
->filename
);
2313 if (num_includes
== 0
2314 && number_dependencies
== 0
2315 && pst
->n_global_syms
== 0
2316 && pst
->n_static_syms
== 0
2317 && has_line_numbers
== 0)
2319 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2320 it is on the obstack, but we can forget to chain it on the list. */
2321 /* Empty psymtabs happen as a result of header files which don't have
2322 any symbols in them. There can be a lot of them. But this check
2323 is wrong, in that a psymtab with N_SLINE entries but nothing else
2324 is not empty, but we don't realize that. Fixing that without slowing
2325 things down might be tricky. */
2327 discard_psymtab (pst
);
2329 /* Indicate that psymtab was thrown away. */
2330 pst
= (struct partial_symtab
*) NULL
;
2336 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2338 struct cleanup
*old_chain
;
2346 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2351 /* Read in all partial symtabs on which this one is dependent */
2352 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2353 if (!pst
->dependencies
[i
]->readin
)
2355 /* Inform about additional files that need to be read in. */
2358 fputs_filtered (" ", gdb_stdout
);
2360 fputs_filtered ("and ", gdb_stdout
);
2362 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2363 wrap_here (""); /* Flush output */
2364 gdb_flush (gdb_stdout
);
2366 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2369 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2371 /* Init stuff necessary for reading in symbols */
2374 old_chain
= make_cleanup (really_free_pendings
, 0);
2375 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2376 symbol_size
= SYMBOL_SIZE (pst
);
2378 /* Read in this file's symbols */
2379 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2380 read_ofile_symtab (pst
);
2382 do_cleanups (old_chain
);
2388 /* Read in all of the symbols for a given psymtab for real.
2389 Be verbose about it if the user wants that. */
2392 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2395 struct cleanup
*back_to
= NULL
;
2402 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2407 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2409 /* Print the message now, before reading the string table,
2410 to avoid disconcerting pauses. */
2413 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2414 gdb_flush (gdb_stdout
);
2417 sym_bfd
= pst
->objfile
->obfd
;
2419 next_symbol_text_func
= dbx_next_symbol_text
;
2421 if (DBX_STAB_SECTION (pst
->objfile
))
2424 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2425 DBX_STAB_SECTION (pst
->objfile
),
2428 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
2431 dbx_psymtab_to_symtab_1 (pst
);
2434 do_cleanups (back_to
);
2436 /* Match with global symbols. This only needs to be done once,
2437 after all of the symtabs and dependencies have been read in. */
2438 scan_file_globals (pst
->objfile
);
2440 /* Finish up the debug error message. */
2442 printf_filtered ("done.\n");
2446 /* Read in a defined section of a specific object file's symbols. */
2449 read_ofile_symtab (struct partial_symtab
*pst
)
2452 struct external_nlist
*bufp
;
2453 struct internal_nlist nlist
;
2455 unsigned max_symnum
;
2457 struct objfile
*objfile
;
2458 int sym_offset
; /* Offset to start of symbols to read */
2459 int sym_size
; /* Size of symbols to read */
2460 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2461 int text_size
; /* Size of text segment for symbols */
2462 struct section_offsets
*section_offsets
;
2464 objfile
= pst
->objfile
;
2465 sym_offset
= LDSYMOFF (pst
);
2466 sym_size
= LDSYMLEN (pst
);
2467 text_offset
= pst
->textlow
;
2468 text_size
= pst
->texthigh
- pst
->textlow
;
2469 /* This cannot be simply objfile->section_offsets because of
2470 elfstab_offset_sections() which initializes the psymtab section
2471 offsets information in a special way, and that is different from
2472 objfile->section_offsets. */
2473 section_offsets
= pst
->section_offsets
;
2475 current_objfile
= objfile
;
2476 subfile_stack
= NULL
;
2478 stringtab_global
= DBX_STRINGTAB (objfile
);
2479 last_source_file
= NULL
;
2481 abfd
= objfile
->obfd
;
2482 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2483 symbuf_end
= symbuf_idx
= 0;
2485 symbuf_left
= sym_offset
+ sym_size
;
2487 /* It is necessary to actually read one symbol *before* the start
2488 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2489 occurs before the N_SO symbol.
2491 Detecting this in read_dbx_symtab
2492 would slow down initial readin, so we look for it here instead. */
2493 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2495 stabs_seek (sym_offset
- symbol_size
);
2497 bufp
= &symbuf
[symbuf_idx
++];
2498 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2499 OBJSTAT (objfile
, n_stabs
++);
2501 namestring
= set_namestring (objfile
, nlist
);
2503 processing_gcc_compilation
= 0;
2504 if (nlist
.n_type
== N_TEXT
)
2506 const char *tempstring
= namestring
;
2508 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2509 processing_gcc_compilation
= 1;
2510 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2511 processing_gcc_compilation
= 2;
2512 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2514 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2515 processing_gcc_compilation
= 2;
2518 /* Try to select a C++ demangling based on the compilation unit
2522 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2523 know whether it will use the old style or v3 mangling. */
2524 if (processing_gcc_compilation
)
2526 if (AUTO_DEMANGLING
)
2528 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2535 /* The N_SO starting this symtab is the first symbol, so we
2536 better not check the symbol before it. I'm not this can
2537 happen, but it doesn't hurt to check for it. */
2538 stabs_seek (sym_offset
);
2539 processing_gcc_compilation
= 0;
2542 if (symbuf_idx
== symbuf_end
)
2544 bufp
= &symbuf
[symbuf_idx
];
2545 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2546 error ("First symbol in segment of executable not a source symbol");
2548 max_symnum
= sym_size
/ symbol_size
;
2551 symnum
< max_symnum
;
2554 QUIT
; /* Allow this to be interruptable */
2555 if (symbuf_idx
== symbuf_end
)
2557 bufp
= &symbuf
[symbuf_idx
++];
2558 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2559 OBJSTAT (objfile
, n_stabs
++);
2561 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2563 namestring
= set_namestring (objfile
, nlist
);
2567 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2568 namestring
, section_offsets
, objfile
);
2570 /* We skip checking for a new .o or -l file; that should never
2571 happen in this routine. */
2572 else if (type
== N_TEXT
)
2574 /* I don't think this code will ever be executed, because
2575 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2576 the N_SO symbol which starts this source file.
2577 However, there is no reason not to accept
2578 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2580 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2581 processing_gcc_compilation
= 1;
2582 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2583 processing_gcc_compilation
= 2;
2586 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2587 know whether it will use the old style or v3 mangling. */
2588 if (AUTO_DEMANGLING
)
2590 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2594 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2595 || type
== (unsigned char) N_NBTEXT
2598 /* Global symbol: see if we came across a dbx defintion for
2599 a corresponding symbol. If so, store the value. Remove
2600 syms from the chain when their values are stored, but
2601 search the whole chain, as there may be several syms from
2602 different files with the same name. */
2603 /* This is probably not true. Since the files will be read
2604 in one at a time, each reference to a global symbol will
2605 be satisfied in each file as it appears. So we skip this
2611 current_objfile
= NULL
;
2613 /* In a Solaris elf file, this variable, which comes from the
2614 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2615 which comes from pst->textlow is correct. */
2616 if (last_source_start_addr
== 0)
2617 last_source_start_addr
= text_offset
;
2619 /* In reordered executables last_source_start_addr may not be the
2620 lower bound for this symtab, instead use text_offset which comes
2621 from pst->textlow which is correct. */
2622 if (last_source_start_addr
> text_offset
)
2623 last_source_start_addr
= text_offset
;
2625 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
2631 /* This handles a single symbol from the symbol-file, building symbols
2632 into a GDB symtab. It takes these arguments and an implicit argument.
2634 TYPE is the type field of the ".stab" symbol entry.
2635 DESC is the desc field of the ".stab" entry.
2636 VALU is the value field of the ".stab" entry.
2637 NAME is the symbol name, in our address space.
2638 SECTION_OFFSETS is a set of amounts by which the sections of this object
2639 file were relocated when it was loaded into memory.
2640 Note that these section_offsets are not the
2641 objfile->section_offsets but the pst->section_offsets.
2642 All symbols that refer
2643 to memory locations need to be offset by these amounts.
2644 OBJFILE is the object file from which we are reading symbols.
2645 It is used in end_symtab. */
2648 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2649 struct section_offsets
*section_offsets
,
2650 struct objfile
*objfile
)
2652 struct context_stack
*new;
2653 /* This remembers the address of the start of a function. It is used
2654 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2655 relative to the current function's start address. On systems
2656 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2657 used to relocate these symbol types rather than SECTION_OFFSETS. */
2658 static CORE_ADDR function_start_offset
;
2660 /* This holds the address of the start of a function, without the system
2661 peculiarities of function_start_offset. */
2662 static CORE_ADDR last_function_start
;
2664 /* If this is nonzero, we've seen an N_SLINE since the start of the
2665 current function. We use this to tell us to move the first sline
2666 to the beginning of the function regardless of what its given
2668 static int sline_found_in_function
= 1;
2670 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2671 file. Used to detect the SunPRO solaris compiler. */
2672 static int n_opt_found
;
2674 /* The stab type used for the definition of the last function.
2675 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2676 static int function_stab_type
= 0;
2678 if (!block_address_function_relative
)
2679 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2680 function start address, so just use the text offset. */
2681 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2683 /* Something is wrong if we see real data before
2684 seeing a source file name. */
2686 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2688 /* Ignore any symbols which appear before an N_SO symbol.
2689 Currently no one puts symbols there, but we should deal
2690 gracefully with the case. A complain()t might be in order,
2691 but this should not be an error (). */
2700 if (*name
== '\000')
2702 /* This N_FUN marks the end of a function. This closes off the
2705 if (context_stack_depth
<= 0)
2707 lbrac_mismatch_complaint (symnum
);
2711 /* The following check is added before recording line 0 at
2712 end of function so as to handle hand-generated stabs
2713 which may have an N_FUN stabs at the end of the function, but
2714 no N_SLINE stabs. */
2715 if (sline_found_in_function
)
2716 record_line (current_subfile
, 0, last_function_start
+ valu
);
2718 within_function
= 0;
2719 new = pop_context ();
2721 /* Make a block for the local symbols within. */
2722 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2723 new->start_addr
, new->start_addr
+ valu
,
2726 /* May be switching to an assembler file which may not be using
2727 block relative stabs, so reset the offset. */
2728 if (block_address_function_relative
)
2729 function_start_offset
= 0;
2734 sline_found_in_function
= 0;
2736 /* Relocate for dynamic loading */
2737 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2738 valu
= SMASH_TEXT_ADDRESS (valu
);
2739 last_function_start
= valu
;
2741 goto define_a_symbol
;
2744 /* This "symbol" just indicates the start of an inner lexical
2745 context within a function. */
2747 /* Ignore extra outermost context from SunPRO cc and acc. */
2748 if (n_opt_found
&& desc
== 1)
2751 if (block_address_function_relative
)
2752 /* Relocate for Sun ELF acc fn-relative syms. */
2753 valu
+= function_start_offset
;
2755 /* On most machines, the block addresses are relative to the
2756 N_SO, the linker did not relocate them (sigh). */
2757 valu
+= last_source_start_addr
;
2759 new = push_context (desc
, valu
);
2763 /* This "symbol" just indicates the end of an inner lexical
2764 context that was started with N_LBRAC. */
2766 /* Ignore extra outermost context from SunPRO cc and acc. */
2767 if (n_opt_found
&& desc
== 1)
2770 if (block_address_function_relative
)
2771 /* Relocate for Sun ELF acc fn-relative syms. */
2772 valu
+= function_start_offset
;
2774 /* On most machines, the block addresses are relative to the
2775 N_SO, the linker did not relocate them (sigh). */
2776 valu
+= last_source_start_addr
;
2778 if (context_stack_depth
<= 0)
2780 lbrac_mismatch_complaint (symnum
);
2784 new = pop_context ();
2785 if (desc
!= new->depth
)
2786 lbrac_mismatch_complaint (symnum
);
2788 /* Some compilers put the variable decls inside of an
2789 LBRAC/RBRAC block. This macro should be nonzero if this
2790 is true. DESC is N_DESC from the N_RBRAC symbol.
2791 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2792 or the GCC2_COMPILED_SYMBOL. */
2793 #if !defined (VARIABLES_INSIDE_BLOCK)
2794 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2797 /* Can only use new->locals as local symbols here if we're in
2798 gcc or on a machine that puts them before the lbrack. */
2799 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2801 if (local_symbols
!= NULL
)
2803 /* GCC development snapshots from March to December of
2804 2000 would output N_LSYM entries after N_LBRAC
2805 entries. As a consequence, these symbols are simply
2806 discarded. Complain if this is the case. Note that
2807 there are some compilers which legitimately put local
2808 symbols within an LBRAC/RBRAC block; this complaint
2809 might also help sort out problems in which
2810 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2811 complaint (&symfile_complaints
,
2812 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2814 local_symbols
= new->locals
;
2817 if (context_stack_depth
2818 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2820 /* This is not the outermost LBRAC...RBRAC pair in the function,
2821 its local symbols preceded it, and are the ones just recovered
2822 from the context stack. Define the block for them (but don't
2823 bother if the block contains no symbols. Should we complain
2824 on blocks without symbols? I can't think of any useful purpose
2826 if (local_symbols
!= NULL
)
2828 /* Muzzle a compiler bug that makes end < start. (which
2829 compilers? Is this ever harmful?). */
2830 if (new->start_addr
> valu
)
2832 complaint (&symfile_complaints
,
2833 "block start larger than block end");
2834 new->start_addr
= valu
;
2836 /* Make a block for the local symbols within. */
2837 finish_block (0, &local_symbols
, new->old_blocks
,
2838 new->start_addr
, valu
, objfile
);
2843 /* This is the outermost LBRAC...RBRAC pair. There is no
2844 need to do anything; leave the symbols that preceded it
2845 to be attached to the function's own block. We need to
2846 indicate that we just moved outside of the function. */
2847 within_function
= 0;
2850 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2851 /* Now pop locals of block just finished. */
2852 local_symbols
= new->locals
;
2857 /* This kind of symbol indicates the start of an object file. */
2858 /* Relocate for dynamic loading */
2859 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2863 /* This type of symbol indicates the start of data
2864 for one source file.
2865 Finish the symbol table of the previous source file
2866 (if any) and start accumulating a new symbol table. */
2867 /* Relocate for dynamic loading */
2868 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2872 if (last_source_file
)
2874 /* Check if previous symbol was also an N_SO (with some
2875 sanity checks). If so, that one was actually the directory
2876 name, and the current one is the real file name.
2878 if (previous_stab_code
== (unsigned char) N_SO
)
2880 patch_subfile_names (current_subfile
, name
);
2881 break; /* Ignore repeated SOs */
2883 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2887 /* Null name means this just marks the end of text for this .o file.
2888 Don't start a new symtab in this case. */
2889 if (*name
== '\000')
2892 if (block_address_function_relative
)
2893 function_start_offset
= 0;
2896 start_symtab (name
, NULL
, valu
);
2897 record_debugformat ("stabs");
2901 /* This type of symbol indicates the start of data for
2902 a sub-source-file, one whose contents were copied or
2903 included in the compilation of the main source file
2904 (whose name was given in the N_SO symbol.) */
2905 /* Relocate for dynamic loading */
2906 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2907 start_subfile (name
, current_subfile
->dirname
);
2912 add_new_header_file (name
, valu
);
2913 start_subfile (name
, current_subfile
->dirname
);
2917 start_subfile (pop_subfile (), current_subfile
->dirname
);
2921 add_old_header_file (name
, valu
);
2925 /* This type of "symbol" really just records
2926 one line-number -- core-address correspondence.
2927 Enter it in the line list for this symbol table. */
2929 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2930 valu
+= function_start_offset
;
2932 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2933 middle of the prologue instead of right at the start of the
2934 function. To deal with this we record the address for the
2935 first N_SLINE stab to be the start of the function instead of
2936 the listed location. We really shouldn't to this. When
2937 compiling with optimization, this first N_SLINE stab might be
2938 optimized away. Other (non-GCC) compilers don't emit this
2939 stab at all. There is no real harm in having an extra
2940 numbered line, although it can be a bit annoying for the
2941 user. However, it totally screws up our testsuite.
2943 So for now, keep adjusting the address of the first N_SLINE
2944 stab, but only for code compiled with GCC. */
2946 if (within_function
&& sline_found_in_function
== 0)
2948 if (processing_gcc_compilation
== 2)
2949 record_line (current_subfile
, desc
, last_function_start
);
2951 record_line (current_subfile
, desc
, valu
);
2952 sline_found_in_function
= 1;
2955 record_line (current_subfile
, desc
, valu
);
2959 common_block_start (name
, objfile
);
2963 common_block_end (objfile
);
2966 /* The following symbol types need to have the appropriate offset added
2967 to their value; then we process symbol definitions in the name. */
2969 case N_STSYM
: /* Static symbol in data seg */
2970 case N_LCSYM
: /* Static symbol in BSS seg */
2971 case N_ROSYM
: /* Static symbol in Read-only data seg */
2972 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2973 Solaris2's stabs-in-elf makes *most* symbols relative
2974 but leaves a few absolute (at least for Solaris 2.1 and version
2975 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2976 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2977 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2978 This leaves us no choice but to search for the 'S' or 'V'...
2979 (or pass the whole section_offsets stuff down ONE MORE function
2980 call level, which we really don't want to do). */
2984 /* .o files and NLMs have non-zero text seg offsets, but don't need
2985 their static syms offset in this fashion. XXX - This is really a
2986 crock that should be fixed in the solib handling code so that I
2987 don't have to work around it here. */
2989 if (!symfile_relocatable
)
2991 p
= strchr (name
, ':');
2992 if (p
!= 0 && p
[1] == 'S')
2994 /* The linker relocated it. We don't want to add an
2995 elfstab_offset_sections-type offset, but we *do* want
2996 to add whatever solib.c passed to symbol_file_add as
2997 addr (this is known to affect SunOS4, and I suspect ELF
2998 too). Since elfstab_offset_sections currently does not
2999 muck with the text offset (there is no Ttext.text
3000 symbol), we can get addr from the text offset. If
3001 elfstab_offset_sections ever starts dealing with the
3002 text offset, and we still need to do this, we need to
3003 invent a SECT_OFF_ADDR_KLUDGE or something. */
3004 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3005 goto define_a_symbol
;
3008 /* Since it's not the kludge case, re-dispatch to the right handler. */
3018 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
3022 case_N_STSYM
: /* Static symbol in data seg */
3023 case N_DSLINE
: /* Source line number, data seg */
3024 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3025 goto define_a_symbol
;
3027 case_N_LCSYM
: /* Static symbol in BSS seg */
3028 case N_BSLINE
: /* Source line number, bss seg */
3029 /* N_BROWS: overlaps with N_BSLINE */
3030 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3031 goto define_a_symbol
;
3033 case_N_ROSYM
: /* Static symbol in Read-only data seg */
3034 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3035 goto define_a_symbol
;
3037 case N_ENTRY
: /* Alternate entry point */
3038 /* Relocate for dynamic loading */
3039 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3040 goto define_a_symbol
;
3042 /* The following symbol types we don't know how to process. Handle
3043 them in a "default" way, but complain to people who care. */
3045 case N_CATCH
: /* Exception handler catcher */
3046 case N_EHDECL
: /* Exception handler name */
3047 case N_PC
: /* Global symbol in Pascal */
3048 case N_M2C
: /* Modula-2 compilation unit */
3049 /* N_MOD2: overlaps with N_EHDECL */
3050 case N_SCOPE
: /* Modula-2 scope information */
3051 case N_ECOML
: /* End common (local name) */
3052 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3057 unknown_symtype_complaint (hex_string (type
));
3060 /* The following symbol types don't need the address field relocated,
3061 since it is either unused, or is absolute. */
3063 case N_GSYM
: /* Global variable */
3064 case N_NSYMS
: /* Number of symbols (ultrix) */
3065 case N_NOMAP
: /* No map? (ultrix) */
3066 case N_RSYM
: /* Register variable */
3067 case N_DEFD
: /* Modula-2 GNU module dependency */
3068 case N_SSYM
: /* Struct or union element */
3069 case N_LSYM
: /* Local symbol in stack */
3070 case N_PSYM
: /* Parameter variable */
3071 case N_LENG
: /* Length of preceding symbol type */
3075 char *colon_pos
= strchr (name
, ':');
3076 if (colon_pos
== NULL
)
3079 deftype
= colon_pos
[1];
3085 function_stab_type
= type
;
3087 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3088 /* Deal with the SunPRO 3.0 compiler which omits the address
3089 from N_FUN symbols. */
3091 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
3093 CORE_ADDR minsym_valu
=
3094 find_stab_function_addr (name
, last_source_file
, objfile
);
3096 /* find_stab_function_addr will return 0 if the minimal
3097 symbol wasn't found. (Unfortunately, this might also
3098 be a valid address.) Anyway, if it *does* return 0,
3099 it is likely that the value was set correctly to begin
3101 if (minsym_valu
!= 0)
3106 if (block_address_function_relative
)
3107 /* For Solaris 2.0 compilers, the block addresses and
3108 N_SLINE's are relative to the start of the
3109 function. On normal systems, and when using gcc on
3110 Solaris 2.0, these addresses are just absolute, or
3111 relative to the N_SO, depending on
3112 BLOCK_ADDRESS_ABSOLUTE. */
3113 function_start_offset
= valu
;
3115 within_function
= 1;
3117 if (context_stack_depth
> 1)
3119 complaint (&symfile_complaints
,
3120 "unmatched N_LBRAC before symtab pos %d", symnum
);
3124 if (context_stack_depth
> 0)
3126 new = pop_context ();
3127 /* Make a block for the local symbols within. */
3128 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3129 new->start_addr
, valu
, objfile
);
3132 new = push_context (0, valu
);
3133 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3137 define_symbol (valu
, name
, desc
, type
, objfile
);
3143 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3144 for a bunch of other flags, too. Someday we may parse their
3145 flags; for now we ignore theirs and hope they'll ignore ours. */
3146 case N_OPT
: /* Solaris 2: Compiler options */
3149 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3151 processing_gcc_compilation
= 2;
3152 #if 0 /* Works, but is experimental. -fnf */
3153 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3154 know whether it will use the old style or v3 mangling. */
3155 if (AUTO_DEMANGLING
)
3157 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3166 case N_MAIN
: /* Name of main routine. */
3167 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3168 it with a symbol file with "main" and without N_MAIN. I'm
3169 not sure exactly what rule to follow but probably something
3170 like: N_MAIN takes precedence over "main" no matter what
3171 objfile it is in; If there is more than one N_MAIN, choose
3172 the one in the symfile_objfile; If there is more than one
3173 N_MAIN within a given objfile, complain() and choose
3174 arbitrarily. (kingdon) */
3176 set_main_name (name
);
3179 /* The following symbol types can be ignored. */
3180 case N_OBJ
: /* Solaris 2: Object file dir and name */
3181 case N_PATCH
: /* Solaris2: Patch Run Time Checker. */
3182 /* N_UNDF: Solaris 2: file separator mark */
3183 /* N_UNDF: -- we will never encounter it, since we only process one
3184 file's symbols at once. */
3185 case N_ENDM
: /* Solaris 2: End of module */
3186 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3190 /* '#' is a GNU C extension to allow one symbol to refer to another
3193 Generally this is used so that an alias can refer to its main
3197 /* Initialize symbol reference names and determine if this is
3198 a definition. If symbol reference is being defined, go
3199 ahead and add it. Otherwise, just return sym. */
3204 /* If this stab defines a new reference ID that is not on the
3205 reference list, then put it on the reference list.
3207 We go ahead and advance NAME past the reference, even though
3208 it is not strictly necessary at this time. */
3209 refnum
= symbol_reference_defined (&s
);
3211 if (!ref_search (refnum
))
3212 ref_add (refnum
, 0, name
, valu
);
3217 previous_stab_code
= type
;
3220 /* FIXME: The only difference between this and elfstab_build_psymtabs
3221 is the call to install_minimal_symbols for elf, and the support for
3222 split sections. If the differences are really that small, the code
3223 should be shared. */
3225 /* Scan and build partial symbols for an coff symbol file.
3226 The coff file has already been processed to get its minimal symbols.
3228 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3231 OBJFILE is the object file we are reading symbols from.
3232 ADDR is the address relative to which the symbols are (e.g.
3233 the base address of the text segment).
3234 MAINLINE is true if we are reading the main symbol
3235 table (as opposed to a shared lib or dynamically loaded file).
3236 TEXTADDR is the address of the text section.
3237 TEXTSIZE is the size of the text section.
3238 STABSECTS is the list of .stab sections in OBJFILE.
3239 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3240 .stabstr section exists.
3242 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3243 adjusted for coff details. */
3246 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3247 CORE_ADDR textaddr
, unsigned int textsize
,
3248 struct stab_section_list
*stabsects
,
3249 file_ptr stabstroffset
, unsigned int stabstrsize
)
3252 bfd
*sym_bfd
= objfile
->obfd
;
3253 char *name
= bfd_get_filename (sym_bfd
);
3254 struct dbx_symfile_info
*info
;
3255 unsigned int stabsize
;
3257 /* There is already a dbx_symfile_info allocated by our caller.
3258 It might even contain some info from the coff symtab to help us. */
3259 info
= objfile
->deprecated_sym_stab_info
;
3261 DBX_TEXT_ADDR (objfile
) = textaddr
;
3262 DBX_TEXT_SIZE (objfile
) = textsize
;
3264 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3265 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3266 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3268 if (stabstrsize
> bfd_get_size (sym_bfd
))
3269 error ("ridiculous string table size: %d bytes", stabstrsize
);
3270 DBX_STRINGTAB (objfile
) = (char *)
3271 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3272 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3274 /* Now read in the string table in one big gulp. */
3276 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3278 perror_with_name (name
);
3279 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3280 if (val
!= stabstrsize
)
3281 perror_with_name (name
);
3283 stabsread_new_init ();
3284 buildsym_new_init ();
3285 free_header_files ();
3286 init_header_files ();
3288 processing_acc_compilation
= 1;
3290 /* In a coff file, we've already installed the minimal symbols that came
3291 from the coff (non-stab) symbol table, so always act like an
3292 incremental load here. */
3293 if (stabsects
->next
== NULL
)
3295 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3296 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3297 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3301 struct stab_section_list
*stabsect
;
3303 DBX_SYMCOUNT (objfile
) = 0;
3304 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3306 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3307 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3310 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3312 symbuf_sections
= stabsects
->next
;
3313 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3317 dbx_symfile_read (objfile
, 0);
3320 /* Scan and build partial symbols for an ELF symbol file.
3321 This ELF file has already been processed to get its minimal symbols.
3323 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3326 OBJFILE is the object file we are reading symbols from.
3327 ADDR is the address relative to which the symbols are (e.g.
3328 the base address of the text segment).
3329 MAINLINE is true if we are reading the main symbol
3330 table (as opposed to a shared lib or dynamically loaded file).
3331 STABSECT is the BFD section information for the .stab section.
3332 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3333 .stabstr section exists.
3335 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3336 adjusted for elf details. */
3339 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3341 file_ptr stabstroffset
, unsigned int stabstrsize
)
3344 bfd
*sym_bfd
= objfile
->obfd
;
3345 char *name
= bfd_get_filename (sym_bfd
);
3346 struct dbx_symfile_info
*info
;
3347 struct cleanup
*back_to
= NULL
;
3349 /* There is already a dbx_symfile_info allocated by our caller.
3350 It might even contain some info from the ELF symtab to help us. */
3351 info
= objfile
->deprecated_sym_stab_info
;
3353 /* Find the first and last text address. dbx_symfile_read seems to
3355 find_text_range (sym_bfd
, objfile
);
3357 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3358 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3359 DBX_SYMCOUNT (objfile
)
3360 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3361 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3362 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3363 DBX_STAB_SECTION (objfile
) = stabsect
;
3365 if (stabstrsize
> bfd_get_size (sym_bfd
))
3366 error ("ridiculous string table size: %d bytes", stabstrsize
);
3367 DBX_STRINGTAB (objfile
) = (char *)
3368 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3369 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3371 /* Now read in the string table in one big gulp. */
3373 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3375 perror_with_name (name
);
3376 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3377 if (val
!= stabstrsize
)
3378 perror_with_name (name
);
3380 stabsread_new_init ();
3381 buildsym_new_init ();
3382 free_header_files ();
3383 init_header_files ();
3385 processing_acc_compilation
= 1;
3388 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3389 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3391 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3393 /* In an elf file, we've already installed the minimal symbols that came
3394 from the elf (non-stab) symbol table, so always act like an
3395 incremental load here. dbx_symfile_read should not generate any new
3396 minimal symbols, since we will have already read the ELF dynamic symbol
3397 table and normal symbol entries won't be in the ".stab" section; but in
3398 case it does, it will install them itself. */
3399 dbx_symfile_read (objfile
, 0);
3402 do_cleanups (back_to
);
3405 /* Scan and build partial symbols for a file with special sections for stabs
3406 and stabstrings. The file has already been processed to get its minimal
3407 symbols, and any other symbols that might be necessary to resolve GSYMs.
3409 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3412 OBJFILE is the object file we are reading symbols from.
3413 ADDR is the address relative to which the symbols are (e.g. the base address
3414 of the text segment).
3415 MAINLINE is true if we are reading the main symbol table (as opposed to a
3416 shared lib or dynamically loaded file).
3417 STAB_NAME is the name of the section that contains the stabs.
3418 STABSTR_NAME is the name of the section that contains the stab strings.
3420 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3423 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3424 char *stabstr_name
, char *text_name
)
3427 bfd
*sym_bfd
= objfile
->obfd
;
3428 char *name
= bfd_get_filename (sym_bfd
);
3430 asection
*stabstrsect
;
3431 asection
*text_sect
;
3433 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3434 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3440 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3441 stab_name
, stabstr_name
);
3443 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3444 xmalloc (sizeof (struct dbx_symfile_info
));
3445 memset (objfile
->deprecated_sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
3447 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3449 error ("Can't find %s section in symbol file", text_name
);
3450 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3451 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3453 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3454 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3455 / DBX_SYMBOL_SIZE (objfile
);
3456 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3457 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3459 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3460 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
3461 DBX_STRINGTAB (objfile
) = (char *)
3462 obstack_alloc (&objfile
->objfile_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3463 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3465 /* Now read in the string table in one big gulp. */
3467 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3468 stabstrsect
, /* bfd section */
3469 DBX_STRINGTAB (objfile
), /* input buffer */
3470 0, /* offset into section */
3471 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3474 perror_with_name (name
);
3476 stabsread_new_init ();
3477 buildsym_new_init ();
3478 free_header_files ();
3479 init_header_files ();
3481 /* Now, do an incremental load */
3483 processing_acc_compilation
= 1;
3484 dbx_symfile_read (objfile
, 0);
3487 static struct sym_fns aout_sym_fns
=
3489 bfd_target_aout_flavour
,
3490 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3491 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3492 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3493 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3494 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
3495 NULL
/* next: pointer to next struct sym_fns */
3499 _initialize_dbxread (void)
3501 add_symtab_fns (&aout_sym_fns
);