1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2008, 2009, 2010.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
43 #include "gdb_obstack.h"
46 #include "breakpoint.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
50 #include "filenames.h"
53 #include "stabsread.h"
54 #include "gdb-stabs.h"
56 #include "complaints.h"
58 #include "cp-support.h"
61 #include "gdb_assert.h"
62 #include "gdb_string.h"
64 #include "aout/aout64.h"
65 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
69 /* We put a pointer to this structure in the read_symtab_private field
74 /* Offset within the file symbol table of first local symbol for this
79 /* Length (in bytes) of the section of the symbol table devoted to
80 this file's symbols (actually, the section bracketed may contain
81 more than just this file's symbols). If ldsymlen is 0, the only
82 reason for this thing's existence is the dependency list. Nothing
83 else will happen when it is read in. */
87 /* The size of each symbol in the symbol file (in external form). */
91 /* Further information needed to locate the symbols if they are in
96 int file_string_offset
;
99 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
100 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
101 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
102 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
103 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
104 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
105 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
108 /* Remember what we deduced to be the source language of this psymtab. */
110 static enum language psymtab_language
= language_unknown
;
112 /* The BFD for this file -- implicit parameter to next_symbol_text. */
114 static bfd
*symfile_bfd
;
116 /* The size of each symbol in the symbol file (in external form).
117 This is set by dbx_symfile_read when building psymtabs, and by
118 dbx_psymtab_to_symtab when building symtabs. */
120 static unsigned symbol_size
;
122 /* This is the offset of the symbol table in the executable file. */
124 static unsigned symbol_table_offset
;
126 /* This is the offset of the string table in the executable file. */
128 static unsigned string_table_offset
;
130 /* For elf+stab executables, the n_strx field is not a simple index
131 into the string table. Instead, each .o file has a base offset in
132 the string table, and the associated symbols contain offsets from
133 this base. The following two variables contain the base offset for
134 the current and next .o files. */
136 static unsigned int file_string_table_offset
;
137 static unsigned int next_file_string_table_offset
;
139 /* .o and NLM files contain unrelocated addresses which are based at
140 0. When non-zero, this flag disables some of the special cases for
141 Solaris elf+stab text addresses at location 0. */
143 static int symfile_relocatable
= 0;
145 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
146 relative to the function start address. */
148 static int block_address_function_relative
= 0;
150 /* The lowest text address we have yet encountered. This is needed
151 because in an a.out file, there is no header field which tells us
152 what address the program is actually going to be loaded at, so we
153 need to make guesses based on the symbols (which *are* relocated to
154 reflect the address it will be loaded at). */
156 static CORE_ADDR lowest_text_address
;
158 /* Non-zero if there is any line number info in the objfile. Prevents
159 end_psymtab from discarding an otherwise empty psymtab. */
161 static int has_line_numbers
;
163 /* Complaints about the symbols we have encountered. */
166 unknown_symtype_complaint (const char *arg1
)
168 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
172 lbrac_mismatch_complaint (int arg1
)
174 complaint (&symfile_complaints
,
175 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
179 repeated_header_complaint (const char *arg1
, int arg2
)
181 complaint (&symfile_complaints
,
182 _("\"repeated\" header file %s not "
183 "previously seen, at symtab pos %d"),
187 /* find_text_range --- find start and end of loadable code sections
189 The find_text_range function finds the shortest address range that
190 encloses all sections containing executable code, and stores it in
191 objfile's text_addr and text_size members.
193 dbx_symfile_read will use this to finish off the partial symbol
194 table, in some cases. */
197 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
204 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
205 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
207 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
208 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
212 if (sec_start
< start
)
227 error (_("Can't find any code sections in symbol file"));
229 DBX_TEXT_ADDR (objfile
) = start
;
230 DBX_TEXT_SIZE (objfile
) = end
- start
;
235 /* During initial symbol readin, we need to have a structure to keep
236 track of which psymtabs have which bincls in them. This structure
237 is used during readin to setup the list of dependencies within each
238 partial symbol table. */
240 struct header_file_location
242 char *name
; /* Name of header file */
243 int instance
; /* See above */
244 struct partial_symtab
*pst
; /* Partial symtab that has the
245 BINCL/EINCL defs for this file. */
248 /* The actual list and controling variables. */
249 static struct header_file_location
*bincl_list
, *next_bincl
;
250 static int bincls_allocated
;
252 /* Local function prototypes. */
254 extern void _initialize_dbxread (void);
256 static void read_ofile_symtab (struct partial_symtab
*);
258 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
260 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
262 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
264 static void read_dbx_symtab (struct objfile
*);
266 static void free_bincl_list (struct objfile
*);
268 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
270 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
272 static void init_bincl_list (int, struct objfile
*);
274 static char *dbx_next_symbol_text (struct objfile
*);
276 static void fill_symbuf (bfd
*);
278 static void dbx_symfile_init (struct objfile
*);
280 static void dbx_new_init (struct objfile
*);
282 static void dbx_symfile_read (struct objfile
*, int);
284 static void dbx_symfile_finish (struct objfile
*);
286 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
288 static void add_new_header_file (char *, int);
290 static void add_old_header_file (char *, int);
292 static void add_this_object_header_file (int);
294 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
296 struct partial_symbol
**,
297 struct partial_symbol
**);
299 /* Free up old header file tables. */
302 free_header_files (void)
304 if (this_object_header_files
)
306 xfree (this_object_header_files
);
307 this_object_header_files
= NULL
;
309 n_allocated_this_object_header_files
= 0;
312 /* Allocate new header file tables. */
315 init_header_files (void)
317 n_allocated_this_object_header_files
= 10;
318 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
321 /* Add header file number I for this object file
322 at the next successive FILENUM. */
325 add_this_object_header_file (int i
)
327 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
329 n_allocated_this_object_header_files
*= 2;
330 this_object_header_files
331 = (int *) xrealloc ((char *) this_object_header_files
,
332 n_allocated_this_object_header_files
* sizeof (int));
335 this_object_header_files
[n_this_object_header_files
++] = i
;
338 /* Add to this file an "old" header file, one already seen in
339 a previous object file. NAME is the header file's name.
340 INSTANCE is its instance code, to select among multiple
341 symbol tables for the same header file. */
344 add_old_header_file (char *name
, int instance
)
346 struct header_file
*p
= HEADER_FILES (current_objfile
);
349 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
350 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
352 add_this_object_header_file (i
);
355 repeated_header_complaint (name
, symnum
);
358 /* Add to this file a "new" header file: definitions for its types follow.
359 NAME is the header file's name.
360 Most often this happens only once for each distinct header file,
361 but not necessarily. If it happens more than once, INSTANCE has
362 a different value each time, and references to the header file
363 use INSTANCE values to select among them.
365 dbx output contains "begin" and "end" markers for each new header file,
366 but at this level we just need to know which files there have been;
367 so we record the file when its "begin" is seen and ignore the "end". */
370 add_new_header_file (char *name
, int instance
)
373 struct header_file
*hfile
;
375 /* Make sure there is room for one more header file. */
377 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
379 if (N_HEADER_FILES (current_objfile
) == i
)
383 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
384 HEADER_FILES (current_objfile
) = (struct header_file
*)
385 xmalloc (10 * sizeof (struct header_file
));
390 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
391 HEADER_FILES (current_objfile
) = (struct header_file
*)
392 xrealloc ((char *) HEADER_FILES (current_objfile
),
393 (i
* sizeof (struct header_file
)));
397 /* Create an entry for this header file. */
399 i
= N_HEADER_FILES (current_objfile
)++;
400 hfile
= HEADER_FILES (current_objfile
) + i
;
401 hfile
->name
= xstrdup (name
);
402 hfile
->instance
= instance
;
405 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
406 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
408 add_this_object_header_file (i
);
412 static struct type
**
413 explicit_lookup_type (int real_filenum
, int index
)
415 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
417 if (index
>= f
->length
)
420 f
->vector
= (struct type
**)
421 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
422 memset (&f
->vector
[f
->length
/ 2],
423 '\0', f
->length
* sizeof (struct type
*) / 2);
425 return &f
->vector
[index
];
430 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
431 struct objfile
*objfile
)
433 enum minimal_symbol_type ms_type
;
435 asection
*bfd_section
;
441 section
= SECT_OFF_TEXT (objfile
);
442 bfd_section
= DBX_TEXT_SECTION (objfile
);
446 section
= SECT_OFF_DATA (objfile
);
447 bfd_section
= DBX_DATA_SECTION (objfile
);
451 section
= SECT_OFF_BSS (objfile
);
452 bfd_section
= DBX_BSS_SECTION (objfile
);
462 section
= SECT_OFF_DATA (objfile
);
463 bfd_section
= DBX_DATA_SECTION (objfile
);
466 /* I don't think this type actually exists; since a N_SETV is the result
467 of going over many .o files, it doesn't make sense to have one
469 ms_type
= mst_file_data
;
470 section
= SECT_OFF_DATA (objfile
);
471 bfd_section
= DBX_DATA_SECTION (objfile
);
478 ms_type
= mst_file_text
;
479 section
= SECT_OFF_TEXT (objfile
);
480 bfd_section
= DBX_TEXT_SECTION (objfile
);
483 ms_type
= mst_file_data
;
485 /* Check for __DYNAMIC, which is used by Sun shared libraries.
486 Record it as global even if it's local, not global, so
487 lookup_minimal_symbol can find it. We don't check symbol_leading_char
488 because for SunOS4 it always is '_'. */
489 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
492 /* Same with virtual function tables, both global and static. */
494 char *tempstring
= name
;
496 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
498 if (is_vtable_name (tempstring
))
501 section
= SECT_OFF_DATA (objfile
);
502 bfd_section
= DBX_DATA_SECTION (objfile
);
505 ms_type
= mst_file_bss
;
506 section
= SECT_OFF_BSS (objfile
);
507 bfd_section
= DBX_BSS_SECTION (objfile
);
510 ms_type
= mst_unknown
;
516 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
517 && address
< lowest_text_address
)
518 lowest_text_address
= address
;
520 prim_record_minimal_symbol_and_info
521 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
524 /* Scan and build partial symbols for a symbol file.
525 We have been initialized by a call to dbx_symfile_init, which
526 put all the relevant info into a "struct dbx_symfile_info",
527 hung off the objfile structure. */
530 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
534 struct cleanup
*back_to
;
536 sym_bfd
= objfile
->obfd
;
538 /* .o and .nlm files are relocatables with text, data and bss segs based at
539 0. This flag disables special (Solaris stabs-in-elf only) fixups for
540 symbols with a value of 0. */
542 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
544 /* This is true for Solaris (and all other systems which put stabs
545 in sections, hopefully, since it would be silly to do things
546 differently from Solaris), and false for SunOS4 and other a.out
548 block_address_function_relative
=
549 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
554 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
556 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
558 perror_with_name (objfile
->name
);
560 /* Size the symbol table. */
561 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
562 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
564 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
565 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
567 free_pending_blocks ();
568 back_to
= make_cleanup (really_free_pendings
, 0);
570 init_minimal_symbol_collection ();
571 make_cleanup_discard_minimal_symbols ();
573 /* Read stabs data from executable file and define symbols. */
575 read_dbx_symtab (objfile
);
577 /* Add the dynamic symbols. */
579 read_dbx_dynamic_symtab (objfile
);
581 /* Install any minimal symbols that have been collected as the current
582 minimal symbols for this objfile. */
584 install_minimal_symbols (objfile
);
586 do_cleanups (back_to
);
589 /* Initialize anything that needs initializing when a completely new
590 symbol file is specified (not just adding some symbols from another
591 file, e.g. a shared library). */
594 dbx_new_init (struct objfile
*ignore
)
596 stabsread_new_init ();
597 buildsym_new_init ();
598 init_header_files ();
602 /* dbx_symfile_init ()
603 is the dbx-specific initialization routine for reading symbols.
604 It is passed a struct objfile which contains, among other things,
605 the BFD for the file whose symbols are being read, and a slot for a pointer
606 to "private data" which we fill with goodies.
608 We read the string table into malloc'd space and stash a pointer to it.
610 Since BFD doesn't know how to read debug symbols in a format-independent
611 way (and may never do so...), we have to do it ourselves. We will never
612 be called unless this is an a.out (or very similar) file.
613 FIXME, there should be a cleaner peephole into the BFD environment here. */
615 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
618 dbx_symfile_init (struct objfile
*objfile
)
621 bfd
*sym_bfd
= objfile
->obfd
;
622 char *name
= bfd_get_filename (sym_bfd
);
624 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
626 /* Allocate struct to keep track of the symfile. */
627 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
628 xmalloc (sizeof (struct dbx_symfile_info
));
629 memset (objfile
->deprecated_sym_stab_info
, 0,
630 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
;
817 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
818 perror_with_name (bfd_get_filename (sym_bfd
));
819 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
820 symbol_table_offset
= filepos
- symbuf_read
;
821 symbuf_sections
= symbuf_sections
->next
;
825 if (count
> sizeof (symbuf
))
826 count
= sizeof (symbuf
);
827 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
831 perror_with_name (bfd_get_filename (sym_bfd
));
832 else if (nbytes
== 0)
833 error (_("Premature end of file reading symbol table"));
834 symbuf_end
= nbytes
/ symbol_size
;
836 symbuf_left
-= nbytes
;
837 symbuf_read
+= nbytes
;
841 stabs_seek (int sym_offset
)
845 symbuf_read
+= sym_offset
;
846 symbuf_left
-= sym_offset
;
849 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
852 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
856 (intern).n_other = 0; \
857 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
858 if (bfd_get_sign_extend_vma (abfd)) \
859 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
861 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
864 /* Invariant: The symbol pointed to by symbuf_idx is the first one
865 that hasn't been swapped. Swap the symbol at the same time
866 that symbuf_idx is incremented. */
868 /* dbx allows the text of a symbol name to be continued into the
869 next symbol name! When such a continuation is encountered
870 (a \ at the end of the text of a name)
871 call this function to get the continuation. */
874 dbx_next_symbol_text (struct objfile
*objfile
)
876 struct internal_nlist nlist
;
878 if (symbuf_idx
== symbuf_end
)
879 fill_symbuf (symfile_bfd
);
882 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
883 OBJSTAT (objfile
, n_stabs
++);
887 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
890 /* Initialize the list of bincls to contain none and have some
894 init_bincl_list (int number
, struct objfile
*objfile
)
896 bincls_allocated
= number
;
897 next_bincl
= bincl_list
= (struct header_file_location
*)
898 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
901 /* Add a bincl to the list. */
904 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
906 if (next_bincl
>= bincl_list
+ bincls_allocated
)
908 int offset
= next_bincl
- bincl_list
;
910 bincls_allocated
*= 2;
911 bincl_list
= (struct header_file_location
*)
912 xrealloc ((char *) bincl_list
,
913 bincls_allocated
* sizeof (struct header_file_location
));
914 next_bincl
= bincl_list
+ offset
;
916 next_bincl
->pst
= pst
;
917 next_bincl
->instance
= instance
;
918 next_bincl
++->name
= name
;
921 /* Given a name, value pair, find the corresponding
922 bincl in the list. Return the partial symtab associated
923 with that header_file_location. */
925 static struct partial_symtab
*
926 find_corresponding_bincl_psymtab (char *name
, int instance
)
928 struct header_file_location
*bincl
;
930 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
931 if (bincl
->instance
== instance
932 && strcmp (name
, bincl
->name
) == 0)
935 repeated_header_complaint (name
, symnum
);
936 return (struct partial_symtab
*) 0;
939 /* Free the storage allocated for the bincl list. */
942 free_bincl_list (struct objfile
*objfile
)
945 bincls_allocated
= 0;
949 do_free_bincl_list_cleanup (void *objfile
)
951 free_bincl_list (objfile
);
954 static struct cleanup
*
955 make_cleanup_free_bincl_list (struct objfile
*objfile
)
957 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
960 /* Set namestring based on nlist. If the string table index is invalid,
961 give a fake name, and print a single error message per symbol file read,
962 rather than abort the symbol reading or flood the user with messages. */
965 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
969 if (nlist
->n_strx
+ file_string_table_offset
970 >= DBX_STRINGTAB_SIZE (objfile
)
971 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
973 complaint (&symfile_complaints
,
974 _("bad string table offset in symbol %d"),
976 namestring
= "<bad string table offset>";
979 namestring
= (nlist
->n_strx
+ file_string_table_offset
980 + DBX_STRINGTAB (objfile
));
984 /* Scan a SunOs dynamic symbol table for symbols of interest and
985 add them to the minimal symbol table. */
988 read_dbx_dynamic_symtab (struct objfile
*objfile
)
990 bfd
*abfd
= objfile
->obfd
;
991 struct cleanup
*back_to
;
1001 CORE_ADDR sym_value
;
1004 /* Check that the symbol file has dynamic symbols that we know about.
1005 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1006 on a sun4 host (and vice versa) and bfd is not configured
1007 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1008 so we ignore the dynamic symbols in this case. */
1009 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1010 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1011 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1014 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1015 if (dynsym_size
< 0)
1018 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1019 back_to
= make_cleanup (xfree
, dynsyms
);
1021 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1022 if (dynsym_count
< 0)
1024 do_cleanups (back_to
);
1028 /* Enter dynamic symbols into the minimal symbol table
1029 if this is a stripped executable. */
1030 if (bfd_get_symcount (abfd
) <= 0)
1033 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1035 asymbol
*sym
= *symptr
;
1039 sec
= bfd_get_section (sym
);
1041 /* BFD symbols are section relative. */
1042 sym_value
= sym
->value
+ sec
->vma
;
1044 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1046 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1047 SECT_OFF_TEXT (objfile
));
1050 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1052 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1053 SECT_OFF_DATA (objfile
));
1056 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1058 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1059 SECT_OFF_BSS (objfile
));
1065 if (sym
->flags
& BSF_GLOBAL
)
1068 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1073 /* Symbols from shared libraries have a dynamic relocation entry
1074 that points to the associated slot in the procedure linkage table.
1075 We make a mininal symbol table entry with type mst_solib_trampoline
1076 at the address in the procedure linkage table. */
1077 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1078 if (dynrel_size
< 0)
1080 do_cleanups (back_to
);
1084 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1085 make_cleanup (xfree
, dynrels
);
1087 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1088 if (dynrel_count
< 0)
1090 do_cleanups (back_to
);
1094 for (counter
= 0, relptr
= dynrels
;
1095 counter
< dynrel_count
;
1096 counter
++, relptr
++)
1098 arelent
*rel
= *relptr
;
1100 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1101 SECT_OFF_DATA (objfile
));
1103 switch (bfd_get_arch (abfd
))
1105 case bfd_arch_sparc
:
1106 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1110 /* `16' is the type BFD produces for a jump table relocation. */
1111 if (rel
->howto
->type
!= 16)
1114 /* Adjust address in the jump table to point to
1115 the start of the bsr instruction. */
1122 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1123 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1127 do_cleanups (back_to
);
1131 find_stab_function_addr (char *namestring
, const char *filename
,
1132 struct objfile
*objfile
)
1134 struct minimal_symbol
*msym
;
1138 p
= strchr (namestring
, ':');
1143 strncpy (p
, namestring
, n
);
1146 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1149 /* Sun Fortran appends an underscore to the minimal symbol name,
1150 try again with an appended underscore if the minimal symbol
1154 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1157 if (msym
== NULL
&& filename
!= NULL
)
1159 /* Try again without the filename. */
1161 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1163 if (msym
== NULL
&& filename
!= NULL
)
1165 /* And try again for Sun Fortran, but without the filename. */
1168 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1171 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1175 function_outside_compilation_unit_complaint (const char *arg1
)
1177 complaint (&symfile_complaints
,
1178 _("function `%s' appears to be defined "
1179 "outside of all compilation units"),
1183 /* Setup partial_symtab's describing each source file for which
1184 debugging information is available. */
1187 read_dbx_symtab (struct objfile
*objfile
)
1189 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1190 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1191 struct internal_nlist nlist
;
1192 CORE_ADDR text_addr
;
1199 int past_first_source_file
= 0;
1200 CORE_ADDR last_o_file_start
= 0;
1201 CORE_ADDR last_function_start
= 0;
1202 struct cleanup
*back_to
;
1204 int textlow_not_set
;
1205 int data_sect_index
;
1207 /* Current partial symtab. */
1208 struct partial_symtab
*pst
;
1210 /* List of current psymtab's include files. */
1211 char **psymtab_include_list
;
1212 int includes_allocated
;
1215 /* Index within current psymtab dependency list. */
1216 struct partial_symtab
**dependency_list
;
1217 int dependencies_used
, dependencies_allocated
;
1219 text_addr
= DBX_TEXT_ADDR (objfile
);
1220 text_size
= DBX_TEXT_SIZE (objfile
);
1222 /* FIXME. We probably want to change stringtab_global rather than add this
1223 while processing every symbol entry. FIXME. */
1224 file_string_table_offset
= 0;
1225 next_file_string_table_offset
= 0;
1227 stringtab_global
= DBX_STRINGTAB (objfile
);
1229 pst
= (struct partial_symtab
*) 0;
1231 includes_allocated
= 30;
1233 psymtab_include_list
= (char **) alloca (includes_allocated
*
1236 dependencies_allocated
= 30;
1237 dependencies_used
= 0;
1239 (struct partial_symtab
**) alloca (dependencies_allocated
*
1240 sizeof (struct partial_symtab
*));
1242 /* Init bincl list */
1243 init_bincl_list (20, objfile
);
1244 back_to
= make_cleanup_free_bincl_list (objfile
);
1246 last_source_file
= NULL
;
1248 lowest_text_address
= (CORE_ADDR
) -1;
1250 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1251 abfd
= objfile
->obfd
;
1252 symbuf_end
= symbuf_idx
= 0;
1253 next_symbol_text_func
= dbx_next_symbol_text
;
1254 textlow_not_set
= 1;
1255 has_line_numbers
= 0;
1257 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1258 to global and static variables. The stab for a global or static
1259 variable doesn't give us any indication of which section it's in,
1260 so we can't tell immediately which offset in
1261 objfile->section_offsets we should apply to the variable's
1264 We could certainly find out which section contains the variable
1265 by looking up the variable's unrelocated address with
1266 find_pc_section, but that would be expensive; this is the
1267 function that constructs the partial symbol tables by examining
1268 every symbol in the entire executable, and it's
1269 performance-critical. So that expense would not be welcome. I'm
1270 not sure what to do about this at the moment.
1272 What we have done for years is to simply assume that the .data
1273 section's offset is appropriate for all global and static
1274 variables. Recently, this was expanded to fall back to the .bss
1275 section's offset if there is no .data section, and then to the
1276 .rodata section's offset. */
1277 data_sect_index
= objfile
->sect_index_data
;
1278 if (data_sect_index
== -1)
1279 data_sect_index
= SECT_OFF_BSS (objfile
);
1280 if (data_sect_index
== -1)
1281 data_sect_index
= SECT_OFF_RODATA (objfile
);
1283 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1284 for the file to have no .data, no .bss, and no .text at all, if
1285 it also has no global or static variables. If it does, we will
1286 get an internal error from an ANOFFSET macro below when we try to
1287 use data_sect_index. */
1289 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1291 /* Get the symbol for this run and pull out some info. */
1292 QUIT
; /* Allow this to be interruptable. */
1293 if (symbuf_idx
== symbuf_end
)
1295 bufp
= &symbuf
[symbuf_idx
++];
1298 * Special case to speed up readin.
1300 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1302 has_line_numbers
= 1;
1306 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1307 OBJSTAT (objfile
, n_stabs
++);
1309 /* Ok. There is a lot of code duplicated in the rest of this
1310 switch statement (for efficiency reasons). Since I don't
1311 like duplicating code, I will do my penance here, and
1312 describe the code which is duplicated:
1314 *) The assignment to namestring.
1315 *) The call to strchr.
1316 *) The addition of a partial symbol the two partial
1317 symbol lists. This last is a large section of code, so
1318 I've imbedded it in the following macro. */
1320 switch (nlist
.n_type
)
1323 * Standard, external, non-debugger, symbols
1326 case N_TEXT
| N_EXT
:
1327 case N_NBTEXT
| N_EXT
:
1328 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1329 SECT_OFF_TEXT (objfile
));
1332 case N_DATA
| N_EXT
:
1333 case N_NBDATA
| N_EXT
:
1334 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1335 SECT_OFF_DATA (objfile
));
1340 case N_NBBSS
| N_EXT
:
1341 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1342 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1343 SECT_OFF_BSS (objfile
));
1348 namestring
= set_namestring (objfile
, &nlist
);
1351 record_minimal_symbol (namestring
, nlist
.n_value
,
1352 nlist
.n_type
, objfile
); /* Always */
1355 /* Standard, local, non-debugger, symbols. */
1359 /* We need to be able to deal with both N_FN or N_TEXT,
1360 because we have no way of knowing whether the sys-supplied ld
1361 or GNU ld was used to make the executable. Sequents throw
1362 in another wrinkle -- they renumbered N_FN. */
1367 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1368 SECT_OFF_TEXT (objfile
));
1369 namestring
= set_namestring (objfile
, &nlist
);
1371 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1372 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1373 && namestring
[nsl
- 2] == '.'))
1375 if (past_first_source_file
&& pst
1376 /* The gould NP1 uses low values for .o and -l symbols
1377 which are not the address. */
1378 && nlist
.n_value
>= pst
->textlow
)
1380 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1381 symnum
* symbol_size
,
1382 nlist
.n_value
> pst
->texthigh
1383 ? nlist
.n_value
: pst
->texthigh
,
1384 dependency_list
, dependencies_used
,
1386 pst
= (struct partial_symtab
*) 0;
1388 dependencies_used
= 0;
1389 has_line_numbers
= 0;
1392 past_first_source_file
= 1;
1393 last_o_file_start
= nlist
.n_value
;
1400 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1401 SECT_OFF_DATA (objfile
));
1404 case N_UNDF
| N_EXT
:
1405 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1406 We used to rely on the target to tell us whether it knows
1407 where the symbol has been relocated to, but none of the
1408 target implementations actually provided that operation.
1409 So we just ignore the symbol, the same way we would do if
1410 we had a target-side symbol lookup which returned no match.
1412 All other symbols (with nlist.n_value == 0), are really
1413 undefined, and so we ignore them too. */
1417 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1419 /* Deal with relative offsets in the string table
1420 used in ELF+STAB under Solaris. If we want to use the
1421 n_strx field, which contains the name of the file,
1422 we must adjust file_string_table_offset *before* calling
1423 set_namestring(). */
1424 past_first_source_file
= 1;
1425 file_string_table_offset
= next_file_string_table_offset
;
1426 next_file_string_table_offset
=
1427 file_string_table_offset
+ nlist
.n_value
;
1428 if (next_file_string_table_offset
< file_string_table_offset
)
1429 error (_("string table offset backs up at %d"), symnum
);
1430 /* FIXME -- replace error() with complaint. */
1435 /* Lots of symbol types we can just ignore. */
1442 /* Keep going . . . */
1445 * Special symbol types for GNU
1448 case N_INDR
| N_EXT
:
1450 case N_SETA
| N_EXT
:
1452 case N_SETT
| N_EXT
:
1454 case N_SETD
| N_EXT
:
1456 case N_SETB
| N_EXT
:
1467 static int prev_so_symnum
= -10;
1468 static int first_so_symnum
;
1470 static char *dirname_nso
;
1471 int prev_textlow_not_set
;
1473 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1474 SECT_OFF_TEXT (objfile
));
1476 prev_textlow_not_set
= textlow_not_set
;
1478 /* A zero value is probably an indication for the SunPRO 3.0
1479 compiler. end_psymtab explicitly tests for zero, so
1480 don't relocate it. */
1482 if (nlist
.n_value
== 0
1483 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1485 textlow_not_set
= 1;
1489 textlow_not_set
= 0;
1491 past_first_source_file
= 1;
1493 if (prev_so_symnum
!= symnum
- 1)
1494 { /* Here if prev stab wasn't N_SO. */
1495 first_so_symnum
= symnum
;
1499 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1500 symnum
* symbol_size
,
1501 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1502 dependency_list
, dependencies_used
,
1503 prev_textlow_not_set
);
1504 pst
= (struct partial_symtab
*) 0;
1506 dependencies_used
= 0;
1507 has_line_numbers
= 0;
1511 prev_so_symnum
= symnum
;
1513 /* End the current partial symtab and start a new one. */
1515 namestring
= set_namestring (objfile
, &nlist
);
1517 /* Null name means end of .o file. Don't start a new one. */
1518 if (*namestring
== '\000')
1521 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1522 The first one is a directory name; the second the file name.
1523 If pst exists, is empty, and has a filename ending in '/',
1524 we assume the previous N_SO was a directory name. */
1526 p
= lbasename (namestring
);
1527 if (p
!= namestring
&& *p
== '\000')
1529 /* Save the directory name SOs locally, then save it into
1530 the psymtab when it's created below. */
1531 dirname_nso
= namestring
;
1535 /* Some other compilers (C++ ones in particular) emit useless
1536 SOs for non-existant .c files. We ignore all subsequent SOs
1537 that immediately follow the first. */
1541 pst
= start_psymtab (objfile
,
1543 first_so_symnum
* symbol_size
,
1544 objfile
->global_psymbols
.next
,
1545 objfile
->static_psymbols
.next
);
1546 pst
->dirname
= dirname_nso
;
1554 enum language tmp_language
;
1556 /* Add this bincl to the bincl_list for future EXCLs. No
1557 need to save the string; it'll be around until
1558 read_dbx_symtab function returns. */
1560 namestring
= set_namestring (objfile
, &nlist
);
1561 tmp_language
= deduce_language_from_filename (namestring
);
1563 /* Only change the psymtab's language if we've learned
1564 something useful (eg. tmp_language is not language_unknown).
1565 In addition, to match what start_subfile does, never change
1567 if (tmp_language
!= language_unknown
1568 && (tmp_language
!= language_c
1569 || psymtab_language
!= language_cplus
))
1570 psymtab_language
= tmp_language
;
1574 /* FIXME: we should not get here without a PST to work on.
1575 Attempt to recover. */
1576 complaint (&symfile_complaints
,
1577 _("N_BINCL %s not in entries for "
1578 "any file, at symtab pos %d"),
1579 namestring
, symnum
);
1582 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1584 /* Mark down an include file in the current psymtab. */
1586 goto record_include_file
;
1591 enum language tmp_language
;
1593 /* Mark down an include file in the current psymtab. */
1594 namestring
= set_namestring (objfile
, &nlist
);
1595 tmp_language
= deduce_language_from_filename (namestring
);
1597 /* Only change the psymtab's language if we've learned
1598 something useful (eg. tmp_language is not language_unknown).
1599 In addition, to match what start_subfile does, never change
1601 if (tmp_language
!= language_unknown
1602 && (tmp_language
!= language_c
1603 || psymtab_language
!= language_cplus
))
1604 psymtab_language
= tmp_language
;
1606 /* In C++, one may expect the same filename to come round many
1607 times, when code is coming alternately from the main file
1608 and from inline functions in other files. So I check to see
1609 if this is a file we've seen before -- either the main
1610 source file, or a previously included file.
1612 This seems to be a lot of time to be spending on N_SOL, but
1613 things like "break c-exp.y:435" need to work (I
1614 suppose the psymtab_include_list could be hashed or put
1615 in a binary tree, if profiling shows this is a major hog). */
1616 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1621 for (i
= 0; i
< includes_used
; i
++)
1622 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1631 record_include_file
:
1633 psymtab_include_list
[includes_used
++] = namestring
;
1634 if (includes_used
>= includes_allocated
)
1636 char **orig
= psymtab_include_list
;
1638 psymtab_include_list
= (char **)
1639 alloca ((includes_allocated
*= 2) * sizeof (char *));
1640 memcpy (psymtab_include_list
, orig
,
1641 includes_used
* sizeof (char *));
1645 case N_LSYM
: /* Typedef or automatic variable. */
1646 case N_STSYM
: /* Data seg var -- static. */
1647 case N_LCSYM
: /* BSS " */
1648 case N_ROSYM
: /* Read-only data seg var -- static. */
1649 case N_NBSTS
: /* Gould nobase. */
1650 case N_NBLCS
: /* symbols. */
1652 case N_GSYM
: /* Global (extern) variable; can be
1653 data or bss (sigh FIXME). */
1655 /* Following may probably be ignored; I'll leave them here
1656 for now (until I do Pascal and Modula 2 extensions). */
1658 case N_PC
: /* I may or may not need this; I
1660 case N_M2C
: /* I suspect that I can ignore this here. */
1661 case N_SCOPE
: /* Same. */
1665 namestring
= set_namestring (objfile
, &nlist
);
1667 /* See if this is an end of function stab. */
1668 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1672 /* It's value is the size (in bytes) of the function for
1673 function relative stabs, or the address of the function's
1674 end for old style stabs. */
1675 valu
= nlist
.n_value
+ last_function_start
;
1676 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1677 pst
->texthigh
= valu
;
1681 p
= (char *) strchr (namestring
, ':');
1683 continue; /* Not a debugging symbol. */
1686 sym_name
= NULL
; /* pacify "gcc -Werror" */
1687 if (psymtab_language
== language_cplus
)
1689 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1690 memcpy (name
, namestring
, p
- namestring
);
1692 name
[p
- namestring
] = '\0';
1693 new_name
= cp_canonicalize_string (name
);
1694 if (new_name
!= NULL
)
1696 sym_len
= strlen (new_name
);
1697 sym_name
= obsavestring (new_name
, sym_len
,
1698 &objfile
->objfile_obstack
);
1706 sym_name
= namestring
;
1707 sym_len
= p
- namestring
;
1710 /* Main processing section for debugging symbols which
1711 the initial read through the symbol tables needs to worry
1712 about. If we reach this point, the symbol which we are
1713 considering is definitely one we are interested in.
1714 p must also contain the (valid) index into the namestring
1715 which indicates the debugging type symbol. */
1720 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1723 if (gdbarch_static_transform_name_p (gdbarch
))
1724 gdbarch_static_transform_name (gdbarch
, namestring
);
1726 add_psymbol_to_list (sym_name
, sym_len
, 1,
1727 VAR_DOMAIN
, LOC_STATIC
,
1728 &objfile
->static_psymbols
,
1730 psymtab_language
, objfile
);
1734 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1736 /* The addresses in these entries are reported to be
1737 wrong. See the code that reads 'G's for symtabs. */
1738 add_psymbol_to_list (sym_name
, sym_len
, 1,
1739 VAR_DOMAIN
, LOC_STATIC
,
1740 &objfile
->global_psymbols
,
1742 psymtab_language
, objfile
);
1746 /* When a 'T' entry is defining an anonymous enum, it
1747 may have a name which is the empty string, or a
1748 single space. Since they're not really defining a
1749 symbol, those shouldn't go in the partial symbol
1750 table. We do pick up the elements of such enums at
1751 'check_enum:', below. */
1752 if (p
>= namestring
+ 2
1753 || (p
== namestring
+ 1
1754 && namestring
[0] != ' '))
1756 add_psymbol_to_list (sym_name
, sym_len
, 1,
1757 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1758 &objfile
->static_psymbols
,
1760 psymtab_language
, objfile
);
1763 /* Also a typedef with the same name. */
1764 add_psymbol_to_list (sym_name
, sym_len
, 1,
1765 VAR_DOMAIN
, LOC_TYPEDEF
,
1766 &objfile
->static_psymbols
,
1768 psymtab_language
, objfile
);
1775 if (p
!= namestring
) /* a name is there, not just :T... */
1777 add_psymbol_to_list (sym_name
, sym_len
, 1,
1778 VAR_DOMAIN
, LOC_TYPEDEF
,
1779 &objfile
->static_psymbols
,
1781 psymtab_language
, objfile
);
1784 /* If this is an enumerated type, we need to
1785 add all the enum constants to the partial symbol
1786 table. This does not cover enums without names, e.g.
1787 "enum {a, b} c;" in C, but fortunately those are
1788 rare. There is no way for GDB to find those from the
1789 enum type without spending too much time on it. Thus
1790 to solve this problem, the compiler needs to put out the
1791 enum in a nameless type. GCC2 does this. */
1793 /* We are looking for something of the form
1794 <name> ":" ("t" | "T") [<number> "="] "e"
1795 {<constant> ":" <value> ","} ";". */
1797 /* Skip over the colon and the 't' or 'T'. */
1799 /* This type may be given a number. Also, numbers can come
1800 in pairs like (0,26). Skip over it. */
1801 while ((*p
>= '0' && *p
<= '9')
1802 || *p
== '(' || *p
== ',' || *p
== ')'
1808 /* The aix4 compiler emits extra crud before the members. */
1811 /* Skip over the type (?). */
1815 /* Skip over the colon. */
1819 /* We have found an enumerated type. */
1820 /* According to comments in read_enum_type
1821 a comma could end it instead of a semicolon.
1822 I don't know where that happens.
1824 while (*p
&& *p
!= ';' && *p
!= ',')
1828 /* Check for and handle cretinous dbx symbol name
1830 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1831 p
= next_symbol_text (objfile
);
1833 /* Point to the character after the name
1834 of the enum constant. */
1835 for (q
= p
; *q
&& *q
!= ':'; q
++)
1837 /* Note that the value doesn't matter for
1838 enum constants in psymtabs, just in symtabs. */
1839 add_psymbol_to_list (p
, q
- p
, 1,
1840 VAR_DOMAIN
, LOC_CONST
,
1841 &objfile
->static_psymbols
, 0,
1842 0, psymtab_language
, objfile
);
1843 /* Point past the name. */
1845 /* Skip over the value. */
1846 while (*p
&& *p
!= ',')
1848 /* Advance past the comma. */
1856 /* Constant, e.g. from "const" in Pascal. */
1857 add_psymbol_to_list (sym_name
, sym_len
, 1,
1858 VAR_DOMAIN
, LOC_CONST
,
1859 &objfile
->static_psymbols
, nlist
.n_value
,
1860 0, psymtab_language
, objfile
);
1866 int name_len
= p
- namestring
;
1867 char *name
= xmalloc (name_len
+ 1);
1869 memcpy (name
, namestring
, name_len
);
1870 name
[name_len
] = '\0';
1871 function_outside_compilation_unit_complaint (name
);
1874 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1875 SECT_OFF_TEXT (objfile
));
1876 /* Kludges for ELF/STABS with Sun ACC. */
1877 last_function_name
= namestring
;
1878 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1879 value for the bottom of the text seg in those cases. */
1880 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1881 SECT_OFF_TEXT (objfile
))
1882 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1884 CORE_ADDR minsym_valu
=
1885 find_stab_function_addr (namestring
,
1886 pst
? pst
->filename
: NULL
,
1889 /* find_stab_function_addr will return 0 if the minimal
1890 symbol wasn't found. (Unfortunately, this might also
1891 be a valid address.) Anyway, if it *does* return 0,
1892 it is likely that the value was set correctly to begin
1894 if (minsym_valu
!= 0)
1895 nlist
.n_value
= minsym_valu
;
1897 if (pst
&& textlow_not_set
1898 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1900 pst
->textlow
= nlist
.n_value
;
1901 textlow_not_set
= 0;
1905 /* Keep track of the start of the last function so we
1906 can handle end of function symbols. */
1907 last_function_start
= nlist
.n_value
;
1909 /* In reordered executables this function may lie outside
1910 the bounds created by N_SO symbols. If that's the case
1911 use the address of this function as the low bound for
1912 the partial symbol table. */
1915 || (nlist
.n_value
< pst
->textlow
1917 != ANOFFSET (objfile
->section_offsets
,
1918 SECT_OFF_TEXT (objfile
))))))
1920 pst
->textlow
= nlist
.n_value
;
1921 textlow_not_set
= 0;
1923 add_psymbol_to_list (sym_name
, sym_len
, 1,
1924 VAR_DOMAIN
, LOC_BLOCK
,
1925 &objfile
->static_psymbols
,
1927 psymtab_language
, objfile
);
1930 /* Global functions were ignored here, but now they
1931 are put into the global psymtab like one would expect.
1932 They're also in the minimal symbol table. */
1936 int name_len
= p
- namestring
;
1937 char *name
= xmalloc (name_len
+ 1);
1939 memcpy (name
, namestring
, name_len
);
1940 name
[name_len
] = '\0';
1941 function_outside_compilation_unit_complaint (name
);
1944 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1945 SECT_OFF_TEXT (objfile
));
1946 /* Kludges for ELF/STABS with Sun ACC. */
1947 last_function_name
= namestring
;
1948 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1949 value for the bottom of the text seg in those cases. */
1950 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1951 SECT_OFF_TEXT (objfile
))
1952 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1954 CORE_ADDR minsym_valu
=
1955 find_stab_function_addr (namestring
,
1956 pst
? pst
->filename
: NULL
,
1959 /* find_stab_function_addr will return 0 if the minimal
1960 symbol wasn't found. (Unfortunately, this might also
1961 be a valid address.) Anyway, if it *does* return 0,
1962 it is likely that the value was set correctly to begin
1964 if (minsym_valu
!= 0)
1965 nlist
.n_value
= minsym_valu
;
1967 if (pst
&& textlow_not_set
1968 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1970 pst
->textlow
= nlist
.n_value
;
1971 textlow_not_set
= 0;
1975 /* Keep track of the start of the last function so we
1976 can handle end of function symbols. */
1977 last_function_start
= nlist
.n_value
;
1979 /* In reordered executables this function may lie outside
1980 the bounds created by N_SO symbols. If that's the case
1981 use the address of this function as the low bound for
1982 the partial symbol table. */
1985 || (nlist
.n_value
< pst
->textlow
1987 != ANOFFSET (objfile
->section_offsets
,
1988 SECT_OFF_TEXT (objfile
))))))
1990 pst
->textlow
= nlist
.n_value
;
1991 textlow_not_set
= 0;
1993 add_psymbol_to_list (sym_name
, sym_len
, 1,
1994 VAR_DOMAIN
, LOC_BLOCK
,
1995 &objfile
->global_psymbols
,
1997 psymtab_language
, objfile
);
2000 /* Two things show up here (hopefully); static symbols of
2001 local scope (static used inside braces) or extensions
2002 of structure symbols. We can ignore both. */
2016 case '#': /* For symbol identification (used in live ranges). */
2020 /* It is a C++ nested symbol. We don't need to record it
2021 (I don't think); if we try to look up foo::bar::baz,
2022 then symbols for the symtab containing foo should get
2023 read in, I think. */
2024 /* Someone says sun cc puts out symbols like
2025 /foo/baz/maclib::/usr/local/bin/maclib,
2026 which would get here with a symbol type of ':'. */
2030 /* Unexpected symbol descriptor. The second and subsequent stabs
2031 of a continued stab can show up here. The question is
2032 whether they ever can mimic a normal stab--it would be
2033 nice if not, since we certainly don't want to spend the
2034 time searching to the end of every string looking for
2037 complaint (&symfile_complaints
,
2038 _("unknown symbol descriptor `%c'"),
2041 /* Ignore it; perhaps it is an extension that we don't
2049 namestring
= set_namestring (objfile
, &nlist
);
2051 /* Find the corresponding bincl and mark that psymtab on the
2052 psymtab dependency list. */
2054 struct partial_symtab
*needed_pst
=
2055 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2057 /* If this include file was defined earlier in this file,
2059 if (needed_pst
== pst
)
2067 for (i
= 0; i
< dependencies_used
; i
++)
2068 if (dependency_list
[i
] == needed_pst
)
2074 /* If it's already in the list, skip the rest. */
2078 dependency_list
[dependencies_used
++] = needed_pst
;
2079 if (dependencies_used
>= dependencies_allocated
)
2081 struct partial_symtab
**orig
= dependency_list
;
2084 (struct partial_symtab
**)
2085 alloca ((dependencies_allocated
*= 2)
2086 * sizeof (struct partial_symtab
*));
2087 memcpy (dependency_list
, orig
,
2089 * sizeof (struct partial_symtab
*)));
2091 fprintf_unfiltered (gdb_stderr
,
2092 "Had to reallocate "
2093 "dependency list.\n");
2094 fprintf_unfiltered (gdb_stderr
,
2095 "New dependencies allocated: %d\n",
2096 dependencies_allocated
);
2104 /* Solaris 2 end of module, finish current partial symbol table.
2105 end_psymtab will set pst->texthigh to the proper value, which
2106 is necessary if a module compiled without debugging info
2107 follows this module. */
2108 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2110 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2111 symnum
* symbol_size
,
2112 (CORE_ADDR
) 0, dependency_list
,
2113 dependencies_used
, textlow_not_set
);
2114 pst
= (struct partial_symtab
*) 0;
2116 dependencies_used
= 0;
2117 has_line_numbers
= 0;
2123 HANDLE_RBRAC (nlist
.n_value
);
2129 case N_SSYM
: /* Claim: Structure or union element.
2130 Hopefully, I can ignore this. */
2131 case N_ENTRY
: /* Alternate entry point; can ignore. */
2132 case N_MAIN
: /* Can definitely ignore this. */
2133 case N_CATCH
: /* These are GNU C++ extensions */
2134 case N_EHDECL
: /* that can safely be ignored here. */
2144 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2145 case N_DEFD
: /* GNU Modula-2 */
2146 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2148 case N_OBJ
: /* Useless types from Solaris. */
2151 /* These symbols aren't interesting; don't worry about them. */
2155 /* If we haven't found it yet, ignore it. It's probably some
2156 new type we don't know about yet. */
2157 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2162 /* If there's stuff to be cleaned up, clean it up. */
2165 /* Don't set pst->texthigh lower than it already is. */
2166 CORE_ADDR text_end
=
2167 (lowest_text_address
== (CORE_ADDR
) -1
2168 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2169 SECT_OFF_TEXT (objfile
)))
2170 : lowest_text_address
)
2173 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2174 symnum
* symbol_size
,
2175 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2176 dependency_list
, dependencies_used
, textlow_not_set
);
2179 do_cleanups (back_to
);
2182 /* Allocate and partially fill a partial symtab. It will be
2183 completely filled at the end of the symbol list.
2185 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2186 is the address relative to which its symbols are (incremental) or 0
2189 static struct partial_symtab
*
2190 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2191 int ldsymoff
, struct partial_symbol
**global_syms
,
2192 struct partial_symbol
**static_syms
)
2194 struct partial_symtab
*result
=
2195 start_psymtab_common (objfile
, objfile
->section_offsets
,
2196 filename
, textlow
, global_syms
, static_syms
);
2198 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2199 sizeof (struct symloc
));
2200 LDSYMOFF (result
) = ldsymoff
;
2201 result
->read_symtab
= dbx_psymtab_to_symtab
;
2202 SYMBOL_SIZE (result
) = symbol_size
;
2203 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2204 STRING_OFFSET (result
) = string_table_offset
;
2205 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2208 /* If we're handling an ELF file, drag some section-relocation info
2209 for this source file out of the ELF symbol table, to compensate for
2210 Sun brain death. This replaces the section_offsets in this psymtab,
2212 elfstab_offset_sections (objfile
, result
);
2215 /* Deduce the source language from the filename for this psymtab. */
2216 psymtab_language
= deduce_language_from_filename (filename
);
2221 /* Close off the current usage of PST.
2222 Returns PST or NULL if the partial symtab was empty and thrown away.
2224 FIXME: List variables and peculiarities of same. */
2226 struct partial_symtab
*
2227 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2228 int capping_symbol_offset
, CORE_ADDR capping_text
,
2229 struct partial_symtab
**dependency_list
, int number_dependencies
,
2230 int textlow_not_set
)
2233 struct objfile
*objfile
= pst
->objfile
;
2234 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2236 if (capping_symbol_offset
!= -1)
2237 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2238 pst
->texthigh
= capping_text
;
2240 /* Under Solaris, the N_SO symbols always have a value of 0,
2241 instead of the usual address of the .o file. Therefore,
2242 we have to do some tricks to fill in texthigh and textlow.
2243 The first trick is: if we see a static
2244 or global function, and the textlow for the current pst
2245 is not set (ie: textlow_not_set), then we use that function's
2246 address for the textlow of the pst. */
2248 /* Now, to fill in texthigh, we remember the last function seen
2249 in the .o file. Also, there's a hack in
2250 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2251 to here via the misc_info field. Therefore, we can fill in
2252 a reliable texthigh by taking the address plus size of the
2253 last function in the file. */
2255 if (pst
->texthigh
== 0 && last_function_name
2256 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2260 struct minimal_symbol
*minsym
;
2262 p
= strchr (last_function_name
, ':');
2264 p
= last_function_name
;
2265 n
= p
- last_function_name
;
2267 strncpy (p
, last_function_name
, n
);
2270 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2273 /* Sun Fortran appends an underscore to the minimal symbol name,
2274 try again with an appended underscore if the minimal symbol
2278 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2282 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2284 last_function_name
= NULL
;
2287 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2289 /* This test will be true if the last .o file is only data. */
2290 else if (textlow_not_set
)
2291 pst
->textlow
= pst
->texthigh
;
2294 struct partial_symtab
*p1
;
2296 /* If we know our own starting text address, then walk through all other
2297 psymtabs for this objfile, and if any didn't know their ending text
2298 address, set it to our starting address. Take care to not set our
2299 own ending address to our starting address, nor to set addresses on
2300 `dependency' files that have both textlow and texthigh zero. */
2302 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2304 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2306 p1
->texthigh
= pst
->textlow
;
2307 /* If this file has only data, then make textlow match
2309 if (p1
->textlow
== 0)
2310 p1
->textlow
= p1
->texthigh
;
2315 /* End of kludge for patching Solaris textlow and texthigh. */
2317 pst
->n_global_syms
=
2318 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2319 + pst
->globals_offset
);
2320 pst
->n_static_syms
=
2321 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2322 + pst
->statics_offset
);
2324 pst
->number_of_dependencies
= number_dependencies
;
2325 if (number_dependencies
)
2327 pst
->dependencies
= (struct partial_symtab
**)
2328 obstack_alloc (&objfile
->objfile_obstack
,
2329 number_dependencies
* sizeof (struct partial_symtab
*));
2330 memcpy (pst
->dependencies
, dependency_list
,
2331 number_dependencies
* sizeof (struct partial_symtab
*));
2334 pst
->dependencies
= 0;
2336 for (i
= 0; i
< num_includes
; i
++)
2338 struct partial_symtab
*subpst
=
2339 allocate_psymtab (include_list
[i
], objfile
);
2341 /* Copy the sesction_offsets array from the main psymtab. */
2342 subpst
->section_offsets
= pst
->section_offsets
;
2343 subpst
->read_symtab_private
=
2344 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2348 subpst
->texthigh
= 0;
2350 /* We could save slight bits of space by only making one of these,
2351 shared by the entire set of include files. FIXME-someday. */
2352 subpst
->dependencies
= (struct partial_symtab
**)
2353 obstack_alloc (&objfile
->objfile_obstack
,
2354 sizeof (struct partial_symtab
*));
2355 subpst
->dependencies
[0] = pst
;
2356 subpst
->number_of_dependencies
= 1;
2358 subpst
->globals_offset
=
2359 subpst
->n_global_syms
=
2360 subpst
->statics_offset
=
2361 subpst
->n_static_syms
= 0;
2365 subpst
->read_symtab
= pst
->read_symtab
;
2368 sort_pst_symbols (pst
);
2370 if (num_includes
== 0
2371 && number_dependencies
== 0
2372 && pst
->n_global_syms
== 0
2373 && pst
->n_static_syms
== 0
2374 && has_line_numbers
== 0)
2376 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2377 it is on the obstack, but we can forget to chain it on the list. */
2378 /* Empty psymtabs happen as a result of header files which don't have
2379 any symbols in them. There can be a lot of them. But this check
2380 is wrong, in that a psymtab with N_SLINE entries but nothing else
2381 is not empty, but we don't realize that. Fixing that without slowing
2382 things down might be tricky. */
2384 discard_psymtab (pst
);
2386 /* Indicate that psymtab was thrown away. */
2387 pst
= (struct partial_symtab
*) NULL
;
2393 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2395 struct cleanup
*old_chain
;
2403 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2404 "Shouldn't happen.\n",
2409 /* Read in all partial symtabs on which this one is dependent. */
2410 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2411 if (!pst
->dependencies
[i
]->readin
)
2413 /* Inform about additional files that need to be read in. */
2416 fputs_filtered (" ", gdb_stdout
);
2418 fputs_filtered ("and ", gdb_stdout
);
2420 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2421 wrap_here (""); /* Flush output. */
2422 gdb_flush (gdb_stdout
);
2424 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2427 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2429 /* Init stuff necessary for reading in symbols */
2432 old_chain
= make_cleanup (really_free_pendings
, 0);
2433 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2434 symbol_size
= SYMBOL_SIZE (pst
);
2436 /* Read in this file's symbols. */
2437 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2438 read_ofile_symtab (pst
);
2440 do_cleanups (old_chain
);
2446 /* Read in all of the symbols for a given psymtab for real.
2447 Be verbose about it if the user wants that. */
2450 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2453 struct cleanup
*back_to
= NULL
;
2460 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2461 "Shouldn't happen.\n",
2466 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2468 /* Print the message now, before reading the string table,
2469 to avoid disconcerting pauses. */
2472 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2473 gdb_flush (gdb_stdout
);
2476 sym_bfd
= pst
->objfile
->obfd
;
2478 next_symbol_text_func
= dbx_next_symbol_text
;
2480 if (DBX_STAB_SECTION (pst
->objfile
))
2483 = symfile_relocate_debug_section (pst
->objfile
,
2484 DBX_STAB_SECTION (pst
->objfile
),
2488 back_to
= make_cleanup (free_current_contents
,
2489 (void *) &stabs_data
);
2492 dbx_psymtab_to_symtab_1 (pst
);
2495 do_cleanups (back_to
);
2497 /* Match with global symbols. This only needs to be done once,
2498 after all of the symtabs and dependencies have been read in. */
2499 scan_file_globals (pst
->objfile
);
2501 /* Finish up the debug error message. */
2503 printf_filtered ("done.\n");
2507 /* Read in a defined section of a specific object file's symbols. */
2510 read_ofile_symtab (struct partial_symtab
*pst
)
2513 struct external_nlist
*bufp
;
2514 struct internal_nlist nlist
;
2516 unsigned max_symnum
;
2518 struct objfile
*objfile
;
2519 int sym_offset
; /* Offset to start of symbols to read */
2520 int sym_size
; /* Size of symbols to read */
2521 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2522 int text_size
; /* Size of text segment for symbols */
2523 struct section_offsets
*section_offsets
;
2525 objfile
= pst
->objfile
;
2526 sym_offset
= LDSYMOFF (pst
);
2527 sym_size
= LDSYMLEN (pst
);
2528 text_offset
= pst
->textlow
;
2529 text_size
= pst
->texthigh
- pst
->textlow
;
2530 /* This cannot be simply objfile->section_offsets because of
2531 elfstab_offset_sections() which initializes the psymtab section
2532 offsets information in a special way, and that is different from
2533 objfile->section_offsets. */
2534 section_offsets
= pst
->section_offsets
;
2536 current_objfile
= objfile
;
2537 subfile_stack
= NULL
;
2539 stringtab_global
= DBX_STRINGTAB (objfile
);
2540 last_source_file
= NULL
;
2542 abfd
= objfile
->obfd
;
2543 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2544 symbuf_end
= symbuf_idx
= 0;
2546 symbuf_left
= sym_offset
+ sym_size
;
2548 /* It is necessary to actually read one symbol *before* the start
2549 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2550 occurs before the N_SO symbol.
2552 Detecting this in read_dbx_symtab
2553 would slow down initial readin, so we look for it here instead. */
2554 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2556 stabs_seek (sym_offset
- symbol_size
);
2558 bufp
= &symbuf
[symbuf_idx
++];
2559 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2560 OBJSTAT (objfile
, n_stabs
++);
2562 namestring
= set_namestring (objfile
, &nlist
);
2564 processing_gcc_compilation
= 0;
2565 if (nlist
.n_type
== N_TEXT
)
2567 const char *tempstring
= namestring
;
2569 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2570 processing_gcc_compilation
= 1;
2571 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2572 processing_gcc_compilation
= 2;
2573 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2575 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2576 processing_gcc_compilation
= 2;
2579 /* Try to select a C++ demangling based on the compilation unit
2583 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2584 know whether it will use the old style or v3 mangling. */
2585 if (processing_gcc_compilation
)
2587 if (AUTO_DEMANGLING
)
2589 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2596 /* The N_SO starting this symtab is the first symbol, so we
2597 better not check the symbol before it. I'm not this can
2598 happen, but it doesn't hurt to check for it. */
2599 stabs_seek (sym_offset
);
2600 processing_gcc_compilation
= 0;
2603 if (symbuf_idx
== symbuf_end
)
2605 bufp
= &symbuf
[symbuf_idx
];
2606 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2607 error (_("First symbol in segment of executable not a source symbol"));
2609 max_symnum
= sym_size
/ symbol_size
;
2612 symnum
< max_symnum
;
2615 QUIT
; /* Allow this to be interruptable. */
2616 if (symbuf_idx
== symbuf_end
)
2618 bufp
= &symbuf
[symbuf_idx
++];
2619 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2620 OBJSTAT (objfile
, n_stabs
++);
2622 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2624 namestring
= set_namestring (objfile
, &nlist
);
2628 if (sizeof (nlist
.n_value
) > 4
2629 /* We are a 64-bit debugger debugging a 32-bit program. */
2630 && (type
== N_LSYM
|| type
== N_PSYM
))
2631 /* We have to be careful with the n_value in the case of N_LSYM
2632 and N_PSYM entries, because they are signed offsets from frame
2633 pointer, but we actually read them as unsigned 32-bit values.
2634 This is not a problem for 32-bit debuggers, for which negative
2635 values end up being interpreted correctly (as negative
2636 offsets) due to integer overflow.
2637 But we need to sign-extend the value for 64-bit debuggers,
2638 or we'll end up interpreting negative values as very large
2639 positive offsets. */
2640 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2641 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2642 namestring
, section_offsets
, objfile
);
2644 /* We skip checking for a new .o or -l file; that should never
2645 happen in this routine. */
2646 else if (type
== N_TEXT
)
2648 /* I don't think this code will ever be executed, because
2649 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2650 the N_SO symbol which starts this source file.
2651 However, there is no reason not to accept
2652 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2654 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2655 processing_gcc_compilation
= 1;
2656 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2657 processing_gcc_compilation
= 2;
2660 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2661 know whether it will use the old style or v3 mangling. */
2662 if (AUTO_DEMANGLING
)
2664 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2668 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2669 || type
== (unsigned char) N_NBTEXT
)
2671 /* Global symbol: see if we came across a dbx defintion for
2672 a corresponding symbol. If so, store the value. Remove
2673 syms from the chain when their values are stored, but
2674 search the whole chain, as there may be several syms from
2675 different files with the same name. */
2676 /* This is probably not true. Since the files will be read
2677 in one at a time, each reference to a global symbol will
2678 be satisfied in each file as it appears. So we skip this
2684 /* In a Solaris elf file, this variable, which comes from the
2685 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2686 which comes from pst->textlow is correct. */
2687 if (last_source_start_addr
== 0)
2688 last_source_start_addr
= text_offset
;
2690 /* In reordered executables last_source_start_addr may not be the
2691 lower bound for this symtab, instead use text_offset which comes
2692 from pst->textlow which is correct. */
2693 if (last_source_start_addr
> text_offset
)
2694 last_source_start_addr
= text_offset
;
2696 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2697 SECT_OFF_TEXT (objfile
));
2701 current_objfile
= NULL
;
2705 /* This handles a single symbol from the symbol-file, building symbols
2706 into a GDB symtab. It takes these arguments and an implicit argument.
2708 TYPE is the type field of the ".stab" symbol entry.
2709 DESC is the desc field of the ".stab" entry.
2710 VALU is the value field of the ".stab" entry.
2711 NAME is the symbol name, in our address space.
2712 SECTION_OFFSETS is a set of amounts by which the sections of this
2713 object file were relocated when it was loaded into memory. Note
2714 that these section_offsets are not the objfile->section_offsets but
2715 the pst->section_offsets. All symbols that refer to memory
2716 locations need to be offset by these amounts.
2717 OBJFILE is the object file from which we are reading symbols. It
2718 is used in end_symtab. */
2721 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2722 struct section_offsets
*section_offsets
,
2723 struct objfile
*objfile
)
2725 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2726 struct context_stack
*new;
2727 /* This remembers the address of the start of a function. It is
2728 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2729 are relative to the current function's start address. On systems
2730 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2731 and is used to relocate these symbol types rather than
2733 static CORE_ADDR function_start_offset
;
2735 /* This holds the address of the start of a function, without the
2736 system peculiarities of function_start_offset. */
2737 static CORE_ADDR last_function_start
;
2739 /* If this is nonzero, we've seen an N_SLINE since the start of the
2740 current function. We use this to tell us to move the first sline
2741 to the beginning of the function regardless of what its given
2743 static int sline_found_in_function
= 1;
2745 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2746 source file. Used to detect the SunPRO solaris compiler. */
2747 static int n_opt_found
;
2749 /* The stab type used for the definition of the last function.
2750 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2751 static int function_stab_type
= 0;
2753 if (!block_address_function_relative
)
2755 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2756 function start address, so just use the text offset. */
2757 function_start_offset
=
2758 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2761 /* Something is wrong if we see real data before seeing a source
2764 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2766 /* Ignore any symbols which appear before an N_SO symbol.
2767 Currently no one puts symbols there, but we should deal
2768 gracefully with the case. A complain()t might be in order,
2769 but this should not be an error (). */
2778 if (*name
== '\000')
2780 /* This N_FUN marks the end of a function. This closes off
2781 the current block. */
2782 struct block
*block
;
2784 if (context_stack_depth
<= 0)
2786 lbrac_mismatch_complaint (symnum
);
2790 /* The following check is added before recording line 0 at
2791 end of function so as to handle hand-generated stabs
2792 which may have an N_FUN stabs at the end of the function,
2793 but no N_SLINE stabs. */
2794 if (sline_found_in_function
)
2796 CORE_ADDR addr
= last_function_start
+ valu
;
2798 record_line (current_subfile
, 0,
2799 gdbarch_addr_bits_remove (gdbarch
, addr
));
2802 within_function
= 0;
2803 new = pop_context ();
2805 /* Make a block for the local symbols within. */
2806 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2807 new->start_addr
, new->start_addr
+ valu
,
2810 /* For C++, set the block's scope. */
2811 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2812 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2815 /* May be switching to an assembler file which may not be using
2816 block relative stabs, so reset the offset. */
2817 if (block_address_function_relative
)
2818 function_start_offset
= 0;
2823 sline_found_in_function
= 0;
2825 /* Relocate for dynamic loading. */
2826 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2827 valu
= gdbarch_smash_text_address (gdbarch
, valu
);
2828 last_function_start
= valu
;
2830 goto define_a_symbol
;
2833 /* This "symbol" just indicates the start of an inner lexical
2834 context within a function. */
2836 /* Ignore extra outermost context from SunPRO cc and acc. */
2837 if (n_opt_found
&& desc
== 1)
2840 if (block_address_function_relative
)
2841 /* Relocate for Sun ELF acc fn-relative syms. */
2842 valu
+= function_start_offset
;
2844 /* On most machines, the block addresses are relative to the
2845 N_SO, the linker did not relocate them (sigh). */
2846 valu
+= last_source_start_addr
;
2848 push_context (desc
, valu
);
2852 /* This "symbol" just indicates the end of an inner lexical
2853 context that was started with N_LBRAC. */
2855 /* Ignore extra outermost context from SunPRO cc and acc. */
2856 if (n_opt_found
&& desc
== 1)
2859 if (block_address_function_relative
)
2860 /* Relocate for Sun ELF acc fn-relative syms. */
2861 valu
+= function_start_offset
;
2863 /* On most machines, the block addresses are relative to the
2864 N_SO, the linker did not relocate them (sigh). */
2865 valu
+= last_source_start_addr
;
2867 if (context_stack_depth
<= 0)
2869 lbrac_mismatch_complaint (symnum
);
2873 new = pop_context ();
2874 if (desc
!= new->depth
)
2875 lbrac_mismatch_complaint (symnum
);
2877 if (local_symbols
!= NULL
)
2879 /* GCC development snapshots from March to December of
2880 2000 would output N_LSYM entries after N_LBRAC
2881 entries. As a consequence, these symbols are simply
2882 discarded. Complain if this is the case. */
2883 complaint (&symfile_complaints
,
2884 _("misplaced N_LBRAC entry; discarding local "
2885 "symbols which have no enclosing block"));
2887 local_symbols
= new->locals
;
2889 if (context_stack_depth
> 1)
2891 /* This is not the outermost LBRAC...RBRAC pair in the
2892 function, its local symbols preceded it, and are the ones
2893 just recovered from the context stack. Define the block
2894 for them (but don't bother if the block contains no
2895 symbols. Should we complain on blocks without symbols?
2896 I can't think of any useful purpose for them). */
2897 if (local_symbols
!= NULL
)
2899 /* Muzzle a compiler bug that makes end < start.
2901 ??? Which compilers? Is this ever harmful?. */
2902 if (new->start_addr
> valu
)
2904 complaint (&symfile_complaints
,
2905 _("block start larger than block end"));
2906 new->start_addr
= valu
;
2908 /* Make a block for the local symbols within. */
2909 finish_block (0, &local_symbols
, new->old_blocks
,
2910 new->start_addr
, valu
, objfile
);
2915 /* This is the outermost LBRAC...RBRAC pair. There is no
2916 need to do anything; leave the symbols that preceded it
2917 to be attached to the function's own block. We need to
2918 indicate that we just moved outside of the function. */
2919 within_function
= 0;
2926 /* This kind of symbol indicates the start of an object file.
2927 Relocate for dynamic loading. */
2928 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2932 /* This type of symbol indicates the start of data for one
2933 source file. Finish the symbol table of the previous source
2934 file (if any) and start accumulating a new symbol table.
2935 Relocate for dynamic loading. */
2936 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2940 if (last_source_file
)
2942 /* Check if previous symbol was also an N_SO (with some
2943 sanity checks). If so, that one was actually the
2944 directory name, and the current one is the real file
2945 name. Patch things up. */
2946 if (previous_stab_code
== (unsigned char) N_SO
)
2948 patch_subfile_names (current_subfile
, name
);
2949 break; /* Ignore repeated SOs. */
2951 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2955 /* Null name means this just marks the end of text for this .o
2956 file. Don't start a new symtab in this case. */
2957 if (*name
== '\000')
2960 if (block_address_function_relative
)
2961 function_start_offset
= 0;
2964 start_symtab (name
, NULL
, valu
);
2965 record_debugformat ("stabs");
2969 /* This type of symbol indicates the start of data for a
2970 sub-source-file, one whose contents were copied or included
2971 in the compilation of the main source file (whose name was
2972 given in the N_SO symbol). Relocate for dynamic loading. */
2973 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2974 start_subfile (name
, current_subfile
->dirname
);
2979 add_new_header_file (name
, valu
);
2980 start_subfile (name
, current_subfile
->dirname
);
2984 start_subfile (pop_subfile (), current_subfile
->dirname
);
2988 add_old_header_file (name
, valu
);
2992 /* This type of "symbol" really just records one line-number --
2993 core-address correspondence. Enter it in the line list for
2994 this symbol table. */
2996 /* Relocate for dynamic loading and for ELF acc
2997 function-relative symbols. */
2998 valu
+= function_start_offset
;
3000 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3001 middle of the prologue instead of right at the start of the
3002 function. To deal with this we record the address for the
3003 first N_SLINE stab to be the start of the function instead of
3004 the listed location. We really shouldn't to this. When
3005 compiling with optimization, this first N_SLINE stab might be
3006 optimized away. Other (non-GCC) compilers don't emit this
3007 stab at all. There is no real harm in having an extra
3008 numbered line, although it can be a bit annoying for the
3009 user. However, it totally screws up our testsuite.
3011 So for now, keep adjusting the address of the first N_SLINE
3012 stab, but only for code compiled with GCC. */
3014 if (within_function
&& sline_found_in_function
== 0)
3016 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
3017 last_function_start
: valu
;
3019 record_line (current_subfile
, desc
,
3020 gdbarch_addr_bits_remove (gdbarch
, addr
));
3021 sline_found_in_function
= 1;
3024 record_line (current_subfile
, desc
,
3025 gdbarch_addr_bits_remove (gdbarch
, valu
));
3029 common_block_start (name
, objfile
);
3033 common_block_end (objfile
);
3036 /* The following symbol types need to have the appropriate
3037 offset added to their value; then we process symbol
3038 definitions in the name. */
3040 case N_STSYM
: /* Static symbol in data segment. */
3041 case N_LCSYM
: /* Static symbol in BSS segment. */
3042 case N_ROSYM
: /* Static symbol in read-only data segment. */
3043 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3044 Solaris 2's stabs-in-elf makes *most* symbols relative but
3045 leaves a few absolute (at least for Solaris 2.1 and version
3046 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3047 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3048 relocates it) .stab "foo:V...",N_STSYM is relative (section
3049 base subtracted). This leaves us no choice but to search for
3050 the 'S' or 'V'... (or pass the whole section_offsets stuff
3051 down ONE MORE function call level, which we really don't want
3056 /* Normal object file and NLMs have non-zero text seg offsets,
3057 but don't need their static syms offset in this fashion.
3058 XXX - This is really a crock that should be fixed in the
3059 solib handling code so that I don't have to work around it
3062 if (!symfile_relocatable
)
3064 p
= strchr (name
, ':');
3065 if (p
!= 0 && p
[1] == 'S')
3067 /* The linker relocated it. We don't want to add an
3068 elfstab_offset_sections-type offset, but we *do*
3069 want to add whatever solib.c passed to
3070 symbol_file_add as addr (this is known to affect
3071 SunOS 4, and I suspect ELF too). Since
3072 elfstab_offset_sections currently does not muck
3073 with the text offset (there is no Ttext.text
3074 symbol), we can get addr from the text offset. If
3075 elfstab_offset_sections ever starts dealing with
3076 the text offset, and we still need to do this, we
3077 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3078 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3079 goto define_a_symbol
;
3082 /* Since it's not the kludge case, re-dispatch to the right
3093 internal_error (__FILE__
, __LINE__
,
3094 _("failed internal consistency check"));
3098 case_N_STSYM
: /* Static symbol in data segment. */
3099 case N_DSLINE
: /* Source line number, data segment. */
3100 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3101 goto define_a_symbol
;
3103 case_N_LCSYM
: /* Static symbol in BSS segment. */
3104 case N_BSLINE
: /* Source line number, BSS segment. */
3105 /* N_BROWS: overlaps with N_BSLINE. */
3106 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3107 goto define_a_symbol
;
3109 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3110 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3111 goto define_a_symbol
;
3113 case N_ENTRY
: /* Alternate entry point. */
3114 /* Relocate for dynamic loading. */
3115 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3116 goto define_a_symbol
;
3118 /* The following symbol types we don't know how to process.
3119 Handle them in a "default" way, but complain to people who
3122 case N_CATCH
: /* Exception handler catcher. */
3123 case N_EHDECL
: /* Exception handler name. */
3124 case N_PC
: /* Global symbol in Pascal. */
3125 case N_M2C
: /* Modula-2 compilation unit. */
3126 /* N_MOD2: overlaps with N_EHDECL. */
3127 case N_SCOPE
: /* Modula-2 scope information. */
3128 case N_ECOML
: /* End common (local name). */
3129 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3134 unknown_symtype_complaint (hex_string (type
));
3137 /* The following symbol types don't need the address field
3138 relocated, since it is either unused, or is absolute. */
3140 case N_GSYM
: /* Global variable. */
3141 case N_NSYMS
: /* Number of symbols (Ultrix). */
3142 case N_NOMAP
: /* No map? (Ultrix). */
3143 case N_RSYM
: /* Register variable. */
3144 case N_DEFD
: /* Modula-2 GNU module dependency. */
3145 case N_SSYM
: /* Struct or union element. */
3146 case N_LSYM
: /* Local symbol in stack. */
3147 case N_PSYM
: /* Parameter variable. */
3148 case N_LENG
: /* Length of preceding symbol type. */
3152 char *colon_pos
= strchr (name
, ':');
3154 if (colon_pos
== NULL
)
3157 deftype
= colon_pos
[1];
3163 function_stab_type
= type
;
3165 /* Deal with the SunPRO 3.0 compiler which omits the
3166 address from N_FUN symbols. */
3168 && valu
== ANOFFSET (section_offsets
,
3169 SECT_OFF_TEXT (objfile
))
3170 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3172 CORE_ADDR minsym_valu
=
3173 find_stab_function_addr (name
, last_source_file
, objfile
);
3175 /* The function find_stab_function_addr will return
3176 0 if the minimal symbol wasn't found.
3177 (Unfortunately, this might also be a valid
3178 address.) Anyway, if it *does* return 0, it is
3179 likely that the value was set correctly to begin
3181 if (minsym_valu
!= 0)
3185 if (block_address_function_relative
)
3186 /* For Solaris 2 compilers, the block addresses and
3187 N_SLINE's are relative to the start of the
3188 function. On normal systems, and when using GCC on
3189 Solaris 2, these addresses are just absolute, or
3190 relative to the N_SO, depending on
3191 BLOCK_ADDRESS_ABSOLUTE. */
3192 function_start_offset
= valu
;
3194 within_function
= 1;
3196 if (context_stack_depth
> 1)
3198 complaint (&symfile_complaints
,
3199 _("unmatched N_LBRAC before symtab pos %d"),
3204 if (context_stack_depth
> 0)
3206 struct block
*block
;
3208 new = pop_context ();
3209 /* Make a block for the local symbols within. */
3210 block
= finish_block (new->name
, &local_symbols
,
3211 new->old_blocks
, new->start_addr
,
3214 /* For C++, set the block's scope. */
3215 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3216 cp_set_block_scope (new->name
, block
,
3217 &objfile
->objfile_obstack
,
3221 new = push_context (0, valu
);
3222 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3226 define_symbol (valu
, name
, desc
, type
, objfile
);
3232 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3233 for a bunch of other flags, too. Someday we may parse their
3234 flags; for now we ignore theirs and hope they'll ignore ours. */
3235 case N_OPT
: /* Solaris 2: Compiler options. */
3238 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3240 processing_gcc_compilation
= 2;
3241 #if 0 /* Works, but is experimental. -fnf */
3242 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3243 we don't know whether it will use the old style or v3
3245 if (AUTO_DEMANGLING
)
3247 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3256 case N_MAIN
: /* Name of main routine. */
3257 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3258 it with a symbol file with "main" and without N_MAIN. I'm
3259 not sure exactly what rule to follow but probably something
3260 like: N_MAIN takes precedence over "main" no matter what
3261 objfile it is in; If there is more than one N_MAIN, choose
3262 the one in the symfile_objfile; If there is more than one
3263 N_MAIN within a given objfile, complain() and choose
3264 arbitrarily. (kingdon) */
3266 set_main_name (name
);
3269 /* The following symbol types can be ignored. */
3270 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3271 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3272 /* N_UNDF: Solaris 2: File separator mark. */
3273 /* N_UNDF: -- we will never encounter it, since we only process
3274 one file's symbols at once. */
3275 case N_ENDM
: /* Solaris 2: End of module. */
3276 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3280 /* '#' is a GNU C extension to allow one symbol to refer to another
3283 Generally this is used so that an alias can refer to its main
3288 /* Initialize symbol reference names and determine if this is a
3289 definition. If a symbol reference is being defined, go ahead
3290 and add it. Otherwise, just return. */
3295 /* If this stab defines a new reference ID that is not on the
3296 reference list, then put it on the reference list.
3298 We go ahead and advance NAME past the reference, even though
3299 it is not strictly necessary at this time. */
3300 refnum
= symbol_reference_defined (&s
);
3302 if (!ref_search (refnum
))
3303 ref_add (refnum
, 0, name
, valu
);
3307 previous_stab_code
= type
;
3310 /* FIXME: The only difference between this and elfstab_build_psymtabs
3311 is the call to install_minimal_symbols for elf, and the support for
3312 split sections. If the differences are really that small, the code
3313 should be shared. */
3315 /* Scan and build partial symbols for an coff symbol file.
3316 The coff file has already been processed to get its minimal symbols.
3318 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3321 OBJFILE is the object file we are reading symbols from.
3322 ADDR is the address relative to which the symbols are (e.g.
3323 the base address of the text segment).
3324 TEXTADDR is the address of the text section.
3325 TEXTSIZE is the size of the text section.
3326 STABSECTS is the list of .stab sections in OBJFILE.
3327 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3328 .stabstr section exists.
3330 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3331 adjusted for coff details. */
3334 coffstab_build_psymtabs (struct objfile
*objfile
,
3335 CORE_ADDR textaddr
, unsigned int textsize
,
3336 struct stab_section_list
*stabsects
,
3337 file_ptr stabstroffset
, unsigned int stabstrsize
)
3340 bfd
*sym_bfd
= objfile
->obfd
;
3341 char *name
= bfd_get_filename (sym_bfd
);
3342 struct dbx_symfile_info
*info
;
3343 unsigned int stabsize
;
3345 /* There is already a dbx_symfile_info allocated by our caller.
3346 It might even contain some info from the coff symtab to help us. */
3347 info
= objfile
->deprecated_sym_stab_info
;
3349 DBX_TEXT_ADDR (objfile
) = textaddr
;
3350 DBX_TEXT_SIZE (objfile
) = textsize
;
3352 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3353 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3354 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3356 if (stabstrsize
> bfd_get_size (sym_bfd
))
3357 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3358 DBX_STRINGTAB (objfile
) = (char *)
3359 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3360 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3362 /* Now read in the string table in one big gulp. */
3364 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3366 perror_with_name (name
);
3367 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3368 if (val
!= stabstrsize
)
3369 perror_with_name (name
);
3371 stabsread_new_init ();
3372 buildsym_new_init ();
3373 free_header_files ();
3374 init_header_files ();
3376 processing_acc_compilation
= 1;
3378 /* In a coff file, we've already installed the minimal symbols that came
3379 from the coff (non-stab) symbol table, so always act like an
3380 incremental load here. */
3381 if (stabsects
->next
== NULL
)
3383 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3384 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3385 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3389 struct stab_section_list
*stabsect
;
3391 DBX_SYMCOUNT (objfile
) = 0;
3392 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3394 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3395 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3398 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3400 symbuf_sections
= stabsects
->next
;
3401 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3405 dbx_symfile_read (objfile
, 0);
3408 /* Scan and build partial symbols for an ELF symbol file.
3409 This ELF file has already been processed to get its minimal symbols.
3411 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3414 OBJFILE is the object file we are reading symbols from.
3415 ADDR is the address relative to which the symbols are (e.g.
3416 the base address of the text segment).
3417 STABSECT is the BFD section information for the .stab section.
3418 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3419 .stabstr section exists.
3421 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3422 adjusted for elf details. */
3425 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3426 file_ptr stabstroffset
, unsigned int stabstrsize
)
3429 bfd
*sym_bfd
= objfile
->obfd
;
3430 char *name
= bfd_get_filename (sym_bfd
);
3431 struct dbx_symfile_info
*info
;
3432 struct cleanup
*back_to
= NULL
;
3434 /* There is already a dbx_symfile_info allocated by our caller.
3435 It might even contain some info from the ELF symtab to help us. */
3436 info
= objfile
->deprecated_sym_stab_info
;
3438 /* Find the first and last text address. dbx_symfile_read seems to
3440 find_text_range (sym_bfd
, objfile
);
3442 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3443 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3444 DBX_SYMCOUNT (objfile
)
3445 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3446 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3447 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3448 DBX_STAB_SECTION (objfile
) = stabsect
;
3450 if (stabstrsize
> bfd_get_size (sym_bfd
))
3451 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3452 DBX_STRINGTAB (objfile
) = (char *)
3453 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3454 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3456 /* Now read in the string table in one big gulp. */
3458 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3460 perror_with_name (name
);
3461 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3462 if (val
!= stabstrsize
)
3463 perror_with_name (name
);
3465 stabsread_new_init ();
3466 buildsym_new_init ();
3467 free_header_files ();
3468 init_header_files ();
3470 processing_acc_compilation
= 1;
3473 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3474 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3476 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3478 /* In an elf file, we've already installed the minimal symbols that came
3479 from the elf (non-stab) symbol table, so always act like an
3480 incremental load here. dbx_symfile_read should not generate any new
3481 minimal symbols, since we will have already read the ELF dynamic symbol
3482 table and normal symbol entries won't be in the ".stab" section; but in
3483 case it does, it will install them itself. */
3484 dbx_symfile_read (objfile
, 0);
3487 do_cleanups (back_to
);
3490 /* Scan and build partial symbols for a file with special sections for stabs
3491 and stabstrings. The file has already been processed to get its minimal
3492 symbols, and any other symbols that might be necessary to resolve GSYMs.
3494 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3497 OBJFILE is the object file we are reading symbols from.
3498 ADDR is the address relative to which the symbols are (e.g. the base address
3499 of the text segment).
3500 STAB_NAME is the name of the section that contains the stabs.
3501 STABSTR_NAME is the name of the section that contains the stab strings.
3503 This routine is mostly copied from dbx_symfile_init and
3504 dbx_symfile_read. */
3507 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3508 char *stabstr_name
, char *text_name
)
3511 bfd
*sym_bfd
= objfile
->obfd
;
3512 char *name
= bfd_get_filename (sym_bfd
);
3514 asection
*stabstrsect
;
3515 asection
*text_sect
;
3517 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3518 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3524 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3525 "but not string section (%s)"),
3526 stab_name
, stabstr_name
);
3528 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3529 xmalloc (sizeof (struct dbx_symfile_info
));
3530 memset (objfile
->deprecated_sym_stab_info
, 0,
3531 sizeof (struct dbx_symfile_info
));
3533 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3535 error (_("Can't find %s section in symbol file"), text_name
);
3536 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3537 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3539 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3540 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3541 / DBX_SYMBOL_SIZE (objfile
);
3542 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3543 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3547 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3548 error (_("ridiculous string table size: %d bytes"),
3549 DBX_STRINGTAB_SIZE (objfile
));
3550 DBX_STRINGTAB (objfile
) = (char *)
3551 obstack_alloc (&objfile
->objfile_obstack
,
3552 DBX_STRINGTAB_SIZE (objfile
) + 1);
3553 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3555 /* Now read in the string table in one big gulp. */
3557 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3558 stabstrsect
, /* bfd section */
3559 DBX_STRINGTAB (objfile
), /* input buffer */
3560 0, /* offset into section */
3561 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3565 perror_with_name (name
);
3567 stabsread_new_init ();
3568 buildsym_new_init ();
3569 free_header_files ();
3570 init_header_files ();
3572 /* Now, do an incremental load. */
3574 processing_acc_compilation
= 1;
3575 dbx_symfile_read (objfile
, 0);
3578 static const struct sym_fns aout_sym_fns
=
3580 bfd_target_aout_flavour
,
3581 dbx_new_init
, /* init anything gbl to entire symtab */
3582 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3583 dbx_symfile_read
, /* read a symbol file into symtab */
3584 NULL
, /* sym_read_psymbols */
3585 dbx_symfile_finish
, /* finished with file, cleanup */
3586 default_symfile_offsets
, /* parse user's offsets to internal form */
3587 default_symfile_segments
, /* Get segment information from a file. */
3589 default_symfile_relocate
, /* Relocate a debug section. */
3594 _initialize_dbxread (void)
3596 add_symtab_fns (&aout_sym_fns
);