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 */
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
55 #include "complaints.h"
57 #include "cp-support.h"
60 #include "gdb_assert.h"
61 #include "gdb_string.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
68 /* We put a pointer to this structure in the read_symtab_private field
73 /* Offset within the file symbol table of first local symbol for this
78 /* Length (in bytes) of the section of the symbol table devoted to
79 this file's symbols (actually, the section bracketed may contain
80 more than just this file's symbols). If ldsymlen is 0, the only
81 reason for this thing's existence is the dependency list. Nothing
82 else will happen when it is read in. */
86 /* The size of each symbol in the symbol file (in external form). */
90 /* Further information needed to locate the symbols if they are in
95 int file_string_offset
;
98 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
99 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
100 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
101 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
102 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
103 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
104 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
107 /* Remember what we deduced to be the source language of this psymtab. */
109 static enum language psymtab_language
= language_unknown
;
111 /* The BFD for this file -- implicit parameter to next_symbol_text. */
113 static bfd
*symfile_bfd
;
115 /* The size of each symbol in the symbol file (in external form).
116 This is set by dbx_symfile_read when building psymtabs, and by
117 dbx_psymtab_to_symtab when building symtabs. */
119 static unsigned symbol_size
;
121 /* This is the offset of the symbol table in the executable file. */
123 static unsigned symbol_table_offset
;
125 /* This is the offset of the string table in the executable file. */
127 static unsigned string_table_offset
;
129 /* For elf+stab executables, the n_strx field is not a simple index
130 into the string table. Instead, each .o file has a base offset in
131 the string table, and the associated symbols contain offsets from
132 this base. The following two variables contain the base offset for
133 the current and next .o files. */
135 static unsigned int file_string_table_offset
;
136 static unsigned int next_file_string_table_offset
;
138 /* .o and NLM files contain unrelocated addresses which are based at
139 0. When non-zero, this flag disables some of the special cases for
140 Solaris elf+stab text addresses at location 0. */
142 static int symfile_relocatable
= 0;
144 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
145 relative to the function start address. */
147 static int block_address_function_relative
= 0;
149 /* The lowest text address we have yet encountered. This is needed
150 because in an a.out file, there is no header field which tells us
151 what address the program is actually going to be loaded at, so we
152 need to make guesses based on the symbols (which *are* relocated to
153 reflect the address it will be loaded at). */
155 static CORE_ADDR lowest_text_address
;
157 /* Non-zero if there is any line number info in the objfile. Prevents
158 end_psymtab from discarding an otherwise empty psymtab. */
160 static int has_line_numbers
;
162 /* Complaints about the symbols we have encountered. */
165 unknown_symtype_complaint (const char *arg1
)
167 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
171 lbrac_mismatch_complaint (int arg1
)
173 complaint (&symfile_complaints
,
174 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
178 repeated_header_complaint (const char *arg1
, int arg2
)
180 complaint (&symfile_complaints
,
181 _("\"repeated\" header file %s not "
182 "previously seen, at symtab pos %d"),
186 /* find_text_range --- find start and end of loadable code sections
188 The find_text_range function finds the shortest address range that
189 encloses all sections containing executable code, and stores it in
190 objfile's text_addr and text_size members.
192 dbx_symfile_read will use this to finish off the partial symbol
193 table, in some cases. */
196 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
203 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
204 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
206 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
207 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
211 if (sec_start
< start
)
226 error (_("Can't find any code sections in symbol file"));
228 DBX_TEXT_ADDR (objfile
) = start
;
229 DBX_TEXT_SIZE (objfile
) = end
- start
;
234 /* During initial symbol readin, we need to have a structure to keep
235 track of which psymtabs have which bincls in them. This structure
236 is used during readin to setup the list of dependencies within each
237 partial symbol table. */
239 struct header_file_location
241 char *name
; /* Name of header file */
242 int instance
; /* See above */
243 struct partial_symtab
*pst
; /* Partial symtab that has the
244 BINCL/EINCL defs for this file. */
247 /* The actual list and controling variables. */
248 static struct header_file_location
*bincl_list
, *next_bincl
;
249 static int bincls_allocated
;
251 /* Local function prototypes. */
253 extern void _initialize_dbxread (void);
255 static void read_ofile_symtab (struct partial_symtab
*);
257 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
259 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
261 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
263 static void read_dbx_symtab (struct objfile
*);
265 static void free_bincl_list (struct objfile
*);
267 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
269 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
271 static void init_bincl_list (int, struct objfile
*);
273 static char *dbx_next_symbol_text (struct objfile
*);
275 static void fill_symbuf (bfd
*);
277 static void dbx_symfile_init (struct objfile
*);
279 static void dbx_new_init (struct objfile
*);
281 static void dbx_symfile_read (struct objfile
*, int);
283 static void dbx_symfile_finish (struct objfile
*);
285 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
287 static void add_new_header_file (char *, int);
289 static void add_old_header_file (char *, int);
291 static void add_this_object_header_file (int);
293 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
295 struct partial_symbol
**,
296 struct partial_symbol
**);
298 /* Free up old header file tables. */
301 free_header_files (void)
303 if (this_object_header_files
)
305 xfree (this_object_header_files
);
306 this_object_header_files
= NULL
;
308 n_allocated_this_object_header_files
= 0;
311 /* Allocate new header file tables. */
314 init_header_files (void)
316 n_allocated_this_object_header_files
= 10;
317 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
320 /* Add header file number I for this object file
321 at the next successive FILENUM. */
324 add_this_object_header_file (int i
)
326 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
328 n_allocated_this_object_header_files
*= 2;
329 this_object_header_files
330 = (int *) xrealloc ((char *) this_object_header_files
,
331 n_allocated_this_object_header_files
* sizeof (int));
334 this_object_header_files
[n_this_object_header_files
++] = i
;
337 /* Add to this file an "old" header file, one already seen in
338 a previous object file. NAME is the header file's name.
339 INSTANCE is its instance code, to select among multiple
340 symbol tables for the same header file. */
343 add_old_header_file (char *name
, int instance
)
345 struct header_file
*p
= HEADER_FILES (current_objfile
);
348 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
349 if (strcmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
351 add_this_object_header_file (i
);
354 repeated_header_complaint (name
, symnum
);
357 /* Add to this file a "new" header file: definitions for its types follow.
358 NAME is the header file's name.
359 Most often this happens only once for each distinct header file,
360 but not necessarily. If it happens more than once, INSTANCE has
361 a different value each time, and references to the header file
362 use INSTANCE values to select among them.
364 dbx output contains "begin" and "end" markers for each new header file,
365 but at this level we just need to know which files there have been;
366 so we record the file when its "begin" is seen and ignore the "end". */
369 add_new_header_file (char *name
, int instance
)
372 struct header_file
*hfile
;
374 /* Make sure there is room for one more header file. */
376 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
378 if (N_HEADER_FILES (current_objfile
) == i
)
382 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
383 HEADER_FILES (current_objfile
) = (struct header_file
*)
384 xmalloc (10 * sizeof (struct header_file
));
389 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
390 HEADER_FILES (current_objfile
) = (struct header_file
*)
391 xrealloc ((char *) HEADER_FILES (current_objfile
),
392 (i
* sizeof (struct header_file
)));
396 /* Create an entry for this header file. */
398 i
= N_HEADER_FILES (current_objfile
)++;
399 hfile
= HEADER_FILES (current_objfile
) + i
;
400 hfile
->name
= xstrdup (name
);
401 hfile
->instance
= instance
;
404 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
405 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
407 add_this_object_header_file (i
);
411 static struct type
**
412 explicit_lookup_type (int real_filenum
, int index
)
414 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
416 if (index
>= f
->length
)
419 f
->vector
= (struct type
**)
420 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
421 memset (&f
->vector
[f
->length
/ 2],
422 '\0', f
->length
* sizeof (struct type
*) / 2);
424 return &f
->vector
[index
];
429 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
430 struct objfile
*objfile
)
432 enum minimal_symbol_type ms_type
;
434 asection
*bfd_section
;
440 section
= SECT_OFF_TEXT (objfile
);
441 bfd_section
= DBX_TEXT_SECTION (objfile
);
445 section
= SECT_OFF_DATA (objfile
);
446 bfd_section
= DBX_DATA_SECTION (objfile
);
450 section
= SECT_OFF_BSS (objfile
);
451 bfd_section
= DBX_BSS_SECTION (objfile
);
461 section
= SECT_OFF_DATA (objfile
);
462 bfd_section
= DBX_DATA_SECTION (objfile
);
465 /* I don't think this type actually exists; since a N_SETV is the result
466 of going over many .o files, it doesn't make sense to have one
468 ms_type
= mst_file_data
;
469 section
= SECT_OFF_DATA (objfile
);
470 bfd_section
= DBX_DATA_SECTION (objfile
);
477 ms_type
= mst_file_text
;
478 section
= SECT_OFF_TEXT (objfile
);
479 bfd_section
= DBX_TEXT_SECTION (objfile
);
482 ms_type
= mst_file_data
;
484 /* Check for __DYNAMIC, which is used by Sun shared libraries.
485 Record it as global even if it's local, not global, so
486 lookup_minimal_symbol can find it. We don't check symbol_leading_char
487 because for SunOS4 it always is '_'. */
488 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
491 /* Same with virtual function tables, both global and static. */
493 char *tempstring
= name
;
495 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
497 if (is_vtable_name (tempstring
))
500 section
= SECT_OFF_DATA (objfile
);
501 bfd_section
= DBX_DATA_SECTION (objfile
);
504 ms_type
= mst_file_bss
;
505 section
= SECT_OFF_BSS (objfile
);
506 bfd_section
= DBX_BSS_SECTION (objfile
);
509 ms_type
= mst_unknown
;
515 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
516 && address
< lowest_text_address
)
517 lowest_text_address
= address
;
519 prim_record_minimal_symbol_and_info
520 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
523 /* Scan and build partial symbols for a symbol file.
524 We have been initialized by a call to dbx_symfile_init, which
525 put all the relevant info into a "struct dbx_symfile_info",
526 hung off the objfile structure. */
529 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
533 struct cleanup
*back_to
;
535 sym_bfd
= objfile
->obfd
;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative
=
548 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
555 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
557 perror_with_name (objfile
->name
);
559 /* Size the symbol table. */
560 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
561 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
563 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
564 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
566 free_pending_blocks ();
567 back_to
= make_cleanup (really_free_pendings
, 0);
569 init_minimal_symbol_collection ();
570 make_cleanup_discard_minimal_symbols ();
572 /* Read stabs data from executable file and define symbols. */
574 read_dbx_symtab (objfile
);
576 /* Add the dynamic symbols. */
578 read_dbx_dynamic_symtab (objfile
);
580 /* Install any minimal symbols that have been collected as the current
581 minimal symbols for this objfile. */
583 install_minimal_symbols (objfile
);
585 do_cleanups (back_to
);
588 /* Initialize anything that needs initializing when a completely new
589 symbol file is specified (not just adding some symbols from another
590 file, e.g. a shared library). */
593 dbx_new_init (struct objfile
*ignore
)
595 stabsread_new_init ();
596 buildsym_new_init ();
597 init_header_files ();
601 /* dbx_symfile_init ()
602 is the dbx-specific initialization routine for reading symbols.
603 It is passed a struct objfile which contains, among other things,
604 the BFD for the file whose symbols are being read, and a slot for a pointer
605 to "private data" which we fill with goodies.
607 We read the string table into malloc'd space and stash a pointer to it.
609 Since BFD doesn't know how to read debug symbols in a format-independent
610 way (and may never do so...), we have to do it ourselves. We will never
611 be called unless this is an a.out (or very similar) file.
612 FIXME, there should be a cleaner peephole into the BFD environment here. */
614 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
617 dbx_symfile_init (struct objfile
*objfile
)
620 bfd
*sym_bfd
= objfile
->obfd
;
621 char *name
= bfd_get_filename (sym_bfd
);
623 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
625 /* Allocate struct to keep track of the symfile. */
626 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
627 xmalloc (sizeof (struct dbx_symfile_info
));
628 memset (objfile
->deprecated_sym_stab_info
, 0,
629 sizeof (struct dbx_symfile_info
));
631 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
632 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
633 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
635 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
636 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
637 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
639 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
641 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
643 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
645 error (_("Can't find .text section in symbol file"));
646 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
647 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
649 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
650 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
651 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
653 /* Read the string table and stash it away in the objfile_obstack.
654 When we blow away the objfile the string table goes away as well.
655 Note that gdb used to use the results of attempting to malloc the
656 string table, based on the size it read, as a form of sanity check
657 for botched byte swapping, on the theory that a byte swapped string
658 table size would be so totally bogus that the malloc would fail. Now
659 that we put in on the objfile_obstack, we can't do this since gdb gets
660 a fatal error (out of virtual memory) if the size is bogus. We can
661 however at least check to see if the size is less than the size of
662 the size field itself, or larger than the size of the entire file.
663 Note that all valid string tables have a size greater than zero, since
664 the bytes used to hold the size are included in the count. */
666 if (STRING_TABLE_OFFSET
== 0)
668 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
669 will never be zero, even when there is no string table. This
670 would appear to be a bug in bfd. */
671 DBX_STRINGTAB_SIZE (objfile
) = 0;
672 DBX_STRINGTAB (objfile
) = NULL
;
676 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
678 perror_with_name (name
);
680 memset (size_temp
, 0, sizeof (size_temp
));
681 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
684 perror_with_name (name
);
688 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
689 EOF if there is no string table, and attempting to read the size
690 from EOF will read zero bytes. */
691 DBX_STRINGTAB_SIZE (objfile
) = 0;
692 DBX_STRINGTAB (objfile
) = NULL
;
696 /* Read some data that would appear to be the string table size.
697 If there really is a string table, then it is probably the right
698 size. Byteswap if necessary and validate the size. Note that
699 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
700 random data that happened to be at STRING_TABLE_OFFSET, because
701 bfd can't tell us there is no string table, the sanity checks may
702 or may not catch this. */
703 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
705 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
706 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
707 error (_("ridiculous string table size (%d bytes)."),
708 DBX_STRINGTAB_SIZE (objfile
));
710 DBX_STRINGTAB (objfile
) =
711 (char *) obstack_alloc (&objfile
->objfile_obstack
,
712 DBX_STRINGTAB_SIZE (objfile
));
713 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
715 /* Now read in the string table in one big gulp. */
717 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
719 perror_with_name (name
);
720 val
= bfd_bread (DBX_STRINGTAB (objfile
),
721 DBX_STRINGTAB_SIZE (objfile
),
723 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
724 perror_with_name (name
);
729 /* Perform any local cleanups required when we are done with a particular
730 objfile. I.E, we are in the process of discarding all symbol information
731 for an objfile, freeing up all memory held for it, and unlinking the
732 objfile struct from the global list of known objfiles. */
735 dbx_symfile_finish (struct objfile
*objfile
)
737 if (objfile
->deprecated_sym_stab_info
!= NULL
)
739 if (HEADER_FILES (objfile
) != NULL
)
741 int i
= N_HEADER_FILES (objfile
);
742 struct header_file
*hfiles
= HEADER_FILES (objfile
);
746 xfree (hfiles
[i
].name
);
747 xfree (hfiles
[i
].vector
);
751 xfree (objfile
->deprecated_sym_stab_info
);
753 free_header_files ();
757 /* Buffer for reading the symbol table entries. */
758 static struct external_nlist symbuf
[4096];
759 static int symbuf_idx
;
760 static int symbuf_end
;
762 /* Name of last function encountered. Used in Solaris to approximate
763 object file boundaries. */
764 static char *last_function_name
;
766 /* The address in memory of the string table of the object file we are
767 reading (which might not be the "main" object file, but might be a
768 shared library or some other dynamically loaded thing). This is
769 set by read_dbx_symtab when building psymtabs, and by
770 read_ofile_symtab when building symtabs, and is used only by
771 next_symbol_text. FIXME: If that is true, we don't need it when
772 building psymtabs, right? */
773 static char *stringtab_global
;
775 /* These variables are used to control fill_symbuf when the stabs
776 symbols are not contiguous (as may be the case when a COFF file is
777 linked using --split-by-reloc). */
778 static struct stab_section_list
*symbuf_sections
;
779 static unsigned int symbuf_left
;
780 static unsigned int symbuf_read
;
782 /* This variable stores a global stabs buffer, if we read stabs into
783 memory in one chunk in order to process relocations. */
784 static bfd_byte
*stabs_data
;
786 /* Refill the symbol table input buffer
787 and set the variables that control fetching entries from it.
788 Reports an error if no data available.
789 This function can read past the end of the symbol table
790 (into the string table) but this does no harm. */
793 fill_symbuf (bfd
*sym_bfd
)
800 nbytes
= sizeof (symbuf
);
801 if (nbytes
> symbuf_left
)
802 nbytes
= symbuf_left
;
803 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
805 else if (symbuf_sections
== NULL
)
807 count
= sizeof (symbuf
);
808 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
812 if (symbuf_left
<= 0)
814 file_ptr filepos
= symbuf_sections
->section
->filepos
;
816 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
817 perror_with_name (bfd_get_filename (sym_bfd
));
818 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
819 symbol_table_offset
= filepos
- symbuf_read
;
820 symbuf_sections
= symbuf_sections
->next
;
824 if (count
> sizeof (symbuf
))
825 count
= sizeof (symbuf
);
826 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
830 perror_with_name (bfd_get_filename (sym_bfd
));
831 else if (nbytes
== 0)
832 error (_("Premature end of file reading symbol table"));
833 symbuf_end
= nbytes
/ symbol_size
;
835 symbuf_left
-= nbytes
;
836 symbuf_read
+= nbytes
;
840 stabs_seek (int sym_offset
)
844 symbuf_read
+= sym_offset
;
845 symbuf_left
-= sym_offset
;
848 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
851 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
853 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
854 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
855 (intern).n_other = 0; \
856 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
857 if (bfd_get_sign_extend_vma (abfd)) \
858 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
860 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
863 /* Invariant: The symbol pointed to by symbuf_idx is the first one
864 that hasn't been swapped. Swap the symbol at the same time
865 that symbuf_idx is incremented. */
867 /* dbx allows the text of a symbol name to be continued into the
868 next symbol name! When such a continuation is encountered
869 (a \ at the end of the text of a name)
870 call this function to get the continuation. */
873 dbx_next_symbol_text (struct objfile
*objfile
)
875 struct internal_nlist nlist
;
877 if (symbuf_idx
== symbuf_end
)
878 fill_symbuf (symfile_bfd
);
881 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
882 OBJSTAT (objfile
, n_stabs
++);
886 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
889 /* Initialize the list of bincls to contain none and have some
893 init_bincl_list (int number
, struct objfile
*objfile
)
895 bincls_allocated
= number
;
896 next_bincl
= bincl_list
= (struct header_file_location
*)
897 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
900 /* Add a bincl to the list. */
903 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
905 if (next_bincl
>= bincl_list
+ bincls_allocated
)
907 int offset
= next_bincl
- bincl_list
;
909 bincls_allocated
*= 2;
910 bincl_list
= (struct header_file_location
*)
911 xrealloc ((char *) bincl_list
,
912 bincls_allocated
* sizeof (struct header_file_location
));
913 next_bincl
= bincl_list
+ offset
;
915 next_bincl
->pst
= pst
;
916 next_bincl
->instance
= instance
;
917 next_bincl
++->name
= name
;
920 /* Given a name, value pair, find the corresponding
921 bincl in the list. Return the partial symtab associated
922 with that header_file_location. */
924 static struct partial_symtab
*
925 find_corresponding_bincl_psymtab (char *name
, int instance
)
927 struct header_file_location
*bincl
;
929 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
930 if (bincl
->instance
== instance
931 && strcmp (name
, bincl
->name
) == 0)
934 repeated_header_complaint (name
, symnum
);
935 return (struct partial_symtab
*) 0;
938 /* Free the storage allocated for the bincl list. */
941 free_bincl_list (struct objfile
*objfile
)
944 bincls_allocated
= 0;
948 do_free_bincl_list_cleanup (void *objfile
)
950 free_bincl_list (objfile
);
953 static struct cleanup
*
954 make_cleanup_free_bincl_list (struct objfile
*objfile
)
956 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
959 /* Set namestring based on nlist. If the string table index is invalid,
960 give a fake name, and print a single error message per symbol file read,
961 rather than abort the symbol reading or flood the user with messages. */
964 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
968 if (nlist
->n_strx
+ file_string_table_offset
969 >= DBX_STRINGTAB_SIZE (objfile
)
970 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
972 complaint (&symfile_complaints
,
973 _("bad string table offset in symbol %d"),
975 namestring
= "<bad string table offset>";
978 namestring
= (nlist
->n_strx
+ file_string_table_offset
979 + DBX_STRINGTAB (objfile
));
983 /* Scan a SunOs dynamic symbol table for symbols of interest and
984 add them to the minimal symbol table. */
987 read_dbx_dynamic_symtab (struct objfile
*objfile
)
989 bfd
*abfd
= objfile
->obfd
;
990 struct cleanup
*back_to
;
1000 CORE_ADDR sym_value
;
1003 /* Check that the symbol file has dynamic symbols that we know about.
1004 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1005 on a sun4 host (and vice versa) and bfd is not configured
1006 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1007 so we ignore the dynamic symbols in this case. */
1008 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1009 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1010 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1013 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1014 if (dynsym_size
< 0)
1017 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1018 back_to
= make_cleanup (xfree
, dynsyms
);
1020 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1021 if (dynsym_count
< 0)
1023 do_cleanups (back_to
);
1027 /* Enter dynamic symbols into the minimal symbol table
1028 if this is a stripped executable. */
1029 if (bfd_get_symcount (abfd
) <= 0)
1032 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1034 asymbol
*sym
= *symptr
;
1038 sec
= bfd_get_section (sym
);
1040 /* BFD symbols are section relative. */
1041 sym_value
= sym
->value
+ sec
->vma
;
1043 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1045 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1046 SECT_OFF_TEXT (objfile
));
1049 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1051 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1052 SECT_OFF_DATA (objfile
));
1055 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1057 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1058 SECT_OFF_BSS (objfile
));
1064 if (sym
->flags
& BSF_GLOBAL
)
1067 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1072 /* Symbols from shared libraries have a dynamic relocation entry
1073 that points to the associated slot in the procedure linkage table.
1074 We make a mininal symbol table entry with type mst_solib_trampoline
1075 at the address in the procedure linkage table. */
1076 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1077 if (dynrel_size
< 0)
1079 do_cleanups (back_to
);
1083 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1084 make_cleanup (xfree
, dynrels
);
1086 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1087 if (dynrel_count
< 0)
1089 do_cleanups (back_to
);
1093 for (counter
= 0, relptr
= dynrels
;
1094 counter
< dynrel_count
;
1095 counter
++, relptr
++)
1097 arelent
*rel
= *relptr
;
1099 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1100 SECT_OFF_DATA (objfile
));
1102 switch (bfd_get_arch (abfd
))
1104 case bfd_arch_sparc
:
1105 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1109 /* `16' is the type BFD produces for a jump table relocation. */
1110 if (rel
->howto
->type
!= 16)
1113 /* Adjust address in the jump table to point to
1114 the start of the bsr instruction. */
1121 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1122 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1126 do_cleanups (back_to
);
1130 find_stab_function_addr (char *namestring
, const char *filename
,
1131 struct objfile
*objfile
)
1133 struct minimal_symbol
*msym
;
1137 p
= strchr (namestring
, ':');
1142 strncpy (p
, namestring
, n
);
1145 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1148 /* Sun Fortran appends an underscore to the minimal symbol name,
1149 try again with an appended underscore if the minimal symbol
1153 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1156 if (msym
== NULL
&& filename
!= NULL
)
1158 /* Try again without the filename. */
1160 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1162 if (msym
== NULL
&& filename
!= NULL
)
1164 /* And try again for Sun Fortran, but without the filename. */
1167 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1170 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1174 function_outside_compilation_unit_complaint (const char *arg1
)
1176 complaint (&symfile_complaints
,
1177 _("function `%s' appears to be defined "
1178 "outside of all compilation units"),
1182 /* Setup partial_symtab's describing each source file for which
1183 debugging information is available. */
1186 read_dbx_symtab (struct objfile
*objfile
)
1188 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1189 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1190 struct internal_nlist nlist
;
1191 CORE_ADDR text_addr
;
1198 int past_first_source_file
= 0;
1199 CORE_ADDR last_o_file_start
= 0;
1200 CORE_ADDR last_function_start
= 0;
1201 struct cleanup
*back_to
;
1203 int textlow_not_set
;
1204 int data_sect_index
;
1206 /* Current partial symtab. */
1207 struct partial_symtab
*pst
;
1209 /* List of current psymtab's include files. */
1210 char **psymtab_include_list
;
1211 int includes_allocated
;
1214 /* Index within current psymtab dependency list. */
1215 struct partial_symtab
**dependency_list
;
1216 int dependencies_used
, dependencies_allocated
;
1218 text_addr
= DBX_TEXT_ADDR (objfile
);
1219 text_size
= DBX_TEXT_SIZE (objfile
);
1221 /* FIXME. We probably want to change stringtab_global rather than add this
1222 while processing every symbol entry. FIXME. */
1223 file_string_table_offset
= 0;
1224 next_file_string_table_offset
= 0;
1226 stringtab_global
= DBX_STRINGTAB (objfile
);
1228 pst
= (struct partial_symtab
*) 0;
1230 includes_allocated
= 30;
1232 psymtab_include_list
= (char **) alloca (includes_allocated
*
1235 dependencies_allocated
= 30;
1236 dependencies_used
= 0;
1238 (struct partial_symtab
**) alloca (dependencies_allocated
*
1239 sizeof (struct partial_symtab
*));
1241 /* Init bincl list */
1242 init_bincl_list (20, objfile
);
1243 back_to
= make_cleanup_free_bincl_list (objfile
);
1245 last_source_file
= NULL
;
1247 lowest_text_address
= (CORE_ADDR
) -1;
1249 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1250 abfd
= objfile
->obfd
;
1251 symbuf_end
= symbuf_idx
= 0;
1252 next_symbol_text_func
= dbx_next_symbol_text
;
1253 textlow_not_set
= 1;
1254 has_line_numbers
= 0;
1256 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1257 to global and static variables. The stab for a global or static
1258 variable doesn't give us any indication of which section it's in,
1259 so we can't tell immediately which offset in
1260 objfile->section_offsets we should apply to the variable's
1263 We could certainly find out which section contains the variable
1264 by looking up the variable's unrelocated address with
1265 find_pc_section, but that would be expensive; this is the
1266 function that constructs the partial symbol tables by examining
1267 every symbol in the entire executable, and it's
1268 performance-critical. So that expense would not be welcome. I'm
1269 not sure what to do about this at the moment.
1271 What we have done for years is to simply assume that the .data
1272 section's offset is appropriate for all global and static
1273 variables. Recently, this was expanded to fall back to the .bss
1274 section's offset if there is no .data section, and then to the
1275 .rodata section's offset. */
1276 data_sect_index
= objfile
->sect_index_data
;
1277 if (data_sect_index
== -1)
1278 data_sect_index
= SECT_OFF_BSS (objfile
);
1279 if (data_sect_index
== -1)
1280 data_sect_index
= SECT_OFF_RODATA (objfile
);
1282 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1283 for the file to have no .data, no .bss, and no .text at all, if
1284 it also has no global or static variables. If it does, we will
1285 get an internal error from an ANOFFSET macro below when we try to
1286 use data_sect_index. */
1288 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1290 /* Get the symbol for this run and pull out some info. */
1291 QUIT
; /* Allow this to be interruptable. */
1292 if (symbuf_idx
== symbuf_end
)
1294 bufp
= &symbuf
[symbuf_idx
++];
1297 * Special case to speed up readin.
1299 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1301 has_line_numbers
= 1;
1305 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1306 OBJSTAT (objfile
, n_stabs
++);
1308 /* Ok. There is a lot of code duplicated in the rest of this
1309 switch statement (for efficiency reasons). Since I don't
1310 like duplicating code, I will do my penance here, and
1311 describe the code which is duplicated:
1313 *) The assignment to namestring.
1314 *) The call to strchr.
1315 *) The addition of a partial symbol the two partial
1316 symbol lists. This last is a large section of code, so
1317 I've imbedded it in the following macro. */
1319 switch (nlist
.n_type
)
1322 * Standard, external, non-debugger, symbols
1325 case N_TEXT
| N_EXT
:
1326 case N_NBTEXT
| N_EXT
:
1327 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1328 SECT_OFF_TEXT (objfile
));
1331 case N_DATA
| N_EXT
:
1332 case N_NBDATA
| N_EXT
:
1333 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1334 SECT_OFF_DATA (objfile
));
1339 case N_NBBSS
| N_EXT
:
1340 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1341 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1342 SECT_OFF_BSS (objfile
));
1347 namestring
= set_namestring (objfile
, &nlist
);
1350 record_minimal_symbol (namestring
, nlist
.n_value
,
1351 nlist
.n_type
, objfile
); /* Always */
1354 /* Standard, local, non-debugger, symbols. */
1358 /* We need to be able to deal with both N_FN or N_TEXT,
1359 because we have no way of knowing whether the sys-supplied ld
1360 or GNU ld was used to make the executable. Sequents throw
1361 in another wrinkle -- they renumbered N_FN. */
1366 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1367 SECT_OFF_TEXT (objfile
));
1368 namestring
= set_namestring (objfile
, &nlist
);
1370 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1371 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1372 && namestring
[nsl
- 2] == '.'))
1374 if (past_first_source_file
&& pst
1375 /* The gould NP1 uses low values for .o and -l symbols
1376 which are not the address. */
1377 && nlist
.n_value
>= pst
->textlow
)
1379 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1380 symnum
* symbol_size
,
1381 nlist
.n_value
> pst
->texthigh
1382 ? nlist
.n_value
: pst
->texthigh
,
1383 dependency_list
, dependencies_used
,
1385 pst
= (struct partial_symtab
*) 0;
1387 dependencies_used
= 0;
1388 has_line_numbers
= 0;
1391 past_first_source_file
= 1;
1392 last_o_file_start
= nlist
.n_value
;
1399 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1400 SECT_OFF_DATA (objfile
));
1403 case N_UNDF
| N_EXT
:
1404 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1405 We used to rely on the target to tell us whether it knows
1406 where the symbol has been relocated to, but none of the
1407 target implementations actually provided that operation.
1408 So we just ignore the symbol, the same way we would do if
1409 we had a target-side symbol lookup which returned no match.
1411 All other symbols (with nlist.n_value == 0), are really
1412 undefined, and so we ignore them too. */
1416 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1418 /* Deal with relative offsets in the string table
1419 used in ELF+STAB under Solaris. If we want to use the
1420 n_strx field, which contains the name of the file,
1421 we must adjust file_string_table_offset *before* calling
1422 set_namestring(). */
1423 past_first_source_file
= 1;
1424 file_string_table_offset
= next_file_string_table_offset
;
1425 next_file_string_table_offset
=
1426 file_string_table_offset
+ nlist
.n_value
;
1427 if (next_file_string_table_offset
< file_string_table_offset
)
1428 error (_("string table offset backs up at %d"), symnum
);
1429 /* FIXME -- replace error() with complaint. */
1434 /* Lots of symbol types we can just ignore. */
1441 /* Keep going . . . */
1444 * Special symbol types for GNU
1447 case N_INDR
| N_EXT
:
1449 case N_SETA
| N_EXT
:
1451 case N_SETT
| N_EXT
:
1453 case N_SETD
| N_EXT
:
1455 case N_SETB
| N_EXT
:
1466 static int prev_so_symnum
= -10;
1467 static int first_so_symnum
;
1469 static char *dirname_nso
;
1470 int prev_textlow_not_set
;
1472 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1473 SECT_OFF_TEXT (objfile
));
1475 prev_textlow_not_set
= textlow_not_set
;
1477 /* A zero value is probably an indication for the SunPRO 3.0
1478 compiler. end_psymtab explicitly tests for zero, so
1479 don't relocate it. */
1481 if (nlist
.n_value
== 0
1482 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1484 textlow_not_set
= 1;
1488 textlow_not_set
= 0;
1490 past_first_source_file
= 1;
1492 if (prev_so_symnum
!= symnum
- 1)
1493 { /* Here if prev stab wasn't N_SO. */
1494 first_so_symnum
= symnum
;
1498 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1499 symnum
* symbol_size
,
1500 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1501 dependency_list
, dependencies_used
,
1502 prev_textlow_not_set
);
1503 pst
= (struct partial_symtab
*) 0;
1505 dependencies_used
= 0;
1506 has_line_numbers
= 0;
1510 prev_so_symnum
= symnum
;
1512 /* End the current partial symtab and start a new one. */
1514 namestring
= set_namestring (objfile
, &nlist
);
1516 /* Null name means end of .o file. Don't start a new one. */
1517 if (*namestring
== '\000')
1520 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1521 The first one is a directory name; the second the file name.
1522 If pst exists, is empty, and has a filename ending in '/',
1523 we assume the previous N_SO was a directory name. */
1525 p
= strrchr (namestring
, '/');
1526 if (p
&& *(p
+ 1) == '\000')
1528 /* Save the directory name SOs locally, then save it into
1529 the psymtab when it's created below. */
1530 dirname_nso
= namestring
;
1534 /* Some other compilers (C++ ones in particular) emit useless
1535 SOs for non-existant .c files. We ignore all subsequent SOs
1536 that immediately follow the first. */
1540 pst
= start_psymtab (objfile
,
1542 first_so_symnum
* symbol_size
,
1543 objfile
->global_psymbols
.next
,
1544 objfile
->static_psymbols
.next
);
1545 pst
->dirname
= dirname_nso
;
1553 enum language tmp_language
;
1555 /* Add this bincl to the bincl_list for future EXCLs. No
1556 need to save the string; it'll be around until
1557 read_dbx_symtab function returns. */
1559 namestring
= set_namestring (objfile
, &nlist
);
1560 tmp_language
= deduce_language_from_filename (namestring
);
1562 /* Only change the psymtab's language if we've learned
1563 something useful (eg. tmp_language is not language_unknown).
1564 In addition, to match what start_subfile does, never change
1566 if (tmp_language
!= language_unknown
1567 && (tmp_language
!= language_c
1568 || psymtab_language
!= language_cplus
))
1569 psymtab_language
= tmp_language
;
1573 /* FIXME: we should not get here without a PST to work on.
1574 Attempt to recover. */
1575 complaint (&symfile_complaints
,
1576 _("N_BINCL %s not in entries for "
1577 "any file, at symtab pos %d"),
1578 namestring
, symnum
);
1581 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1583 /* Mark down an include file in the current psymtab. */
1585 goto record_include_file
;
1590 enum language tmp_language
;
1592 /* Mark down an include file in the current psymtab. */
1593 namestring
= set_namestring (objfile
, &nlist
);
1594 tmp_language
= deduce_language_from_filename (namestring
);
1596 /* Only change the psymtab's language if we've learned
1597 something useful (eg. tmp_language is not language_unknown).
1598 In addition, to match what start_subfile does, never change
1600 if (tmp_language
!= language_unknown
1601 && (tmp_language
!= language_c
1602 || psymtab_language
!= language_cplus
))
1603 psymtab_language
= tmp_language
;
1605 /* In C++, one may expect the same filename to come round many
1606 times, when code is coming alternately from the main file
1607 and from inline functions in other files. So I check to see
1608 if this is a file we've seen before -- either the main
1609 source file, or a previously included file.
1611 This seems to be a lot of time to be spending on N_SOL, but
1612 things like "break c-exp.y:435" need to work (I
1613 suppose the psymtab_include_list could be hashed or put
1614 in a binary tree, if profiling shows this is a major hog). */
1615 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1620 for (i
= 0; i
< includes_used
; i
++)
1621 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1630 record_include_file
:
1632 psymtab_include_list
[includes_used
++] = namestring
;
1633 if (includes_used
>= includes_allocated
)
1635 char **orig
= psymtab_include_list
;
1637 psymtab_include_list
= (char **)
1638 alloca ((includes_allocated
*= 2) * sizeof (char *));
1639 memcpy (psymtab_include_list
, orig
,
1640 includes_used
* sizeof (char *));
1644 case N_LSYM
: /* Typedef or automatic variable. */
1645 case N_STSYM
: /* Data seg var -- static. */
1646 case N_LCSYM
: /* BSS " */
1647 case N_ROSYM
: /* Read-only data seg var -- static. */
1648 case N_NBSTS
: /* Gould nobase. */
1649 case N_NBLCS
: /* symbols. */
1651 case N_GSYM
: /* Global (extern) variable; can be
1652 data or bss (sigh FIXME). */
1654 /* Following may probably be ignored; I'll leave them here
1655 for now (until I do Pascal and Modula 2 extensions). */
1657 case N_PC
: /* I may or may not need this; I
1659 case N_M2C
: /* I suspect that I can ignore this here. */
1660 case N_SCOPE
: /* Same. */
1664 namestring
= set_namestring (objfile
, &nlist
);
1666 /* See if this is an end of function stab. */
1667 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1671 /* It's value is the size (in bytes) of the function for
1672 function relative stabs, or the address of the function's
1673 end for old style stabs. */
1674 valu
= nlist
.n_value
+ last_function_start
;
1675 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1676 pst
->texthigh
= valu
;
1680 p
= (char *) strchr (namestring
, ':');
1682 continue; /* Not a debugging symbol. */
1685 sym_name
= NULL
; /* pacify "gcc -Werror" */
1686 if (psymtab_language
== language_cplus
)
1688 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1689 memcpy (name
, namestring
, p
- namestring
);
1691 name
[p
- namestring
] = '\0';
1692 new_name
= cp_canonicalize_string (name
);
1693 if (new_name
!= NULL
)
1695 sym_len
= strlen (new_name
);
1696 sym_name
= obsavestring (new_name
, sym_len
,
1697 &objfile
->objfile_obstack
);
1705 sym_name
= namestring
;
1706 sym_len
= p
- namestring
;
1709 /* Main processing section for debugging symbols which
1710 the initial read through the symbol tables needs to worry
1711 about. If we reach this point, the symbol which we are
1712 considering is definitely one we are interested in.
1713 p must also contain the (valid) index into the namestring
1714 which indicates the debugging type symbol. */
1719 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1722 if (gdbarch_static_transform_name_p (gdbarch
))
1723 gdbarch_static_transform_name (gdbarch
, namestring
);
1725 add_psymbol_to_list (sym_name
, sym_len
, 1,
1726 VAR_DOMAIN
, LOC_STATIC
,
1727 &objfile
->static_psymbols
,
1729 psymtab_language
, objfile
);
1733 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1735 /* The addresses in these entries are reported to be
1736 wrong. See the code that reads 'G's for symtabs. */
1737 add_psymbol_to_list (sym_name
, sym_len
, 1,
1738 VAR_DOMAIN
, LOC_STATIC
,
1739 &objfile
->global_psymbols
,
1741 psymtab_language
, objfile
);
1745 /* When a 'T' entry is defining an anonymous enum, it
1746 may have a name which is the empty string, or a
1747 single space. Since they're not really defining a
1748 symbol, those shouldn't go in the partial symbol
1749 table. We do pick up the elements of such enums at
1750 'check_enum:', below. */
1751 if (p
>= namestring
+ 2
1752 || (p
== namestring
+ 1
1753 && namestring
[0] != ' '))
1755 add_psymbol_to_list (sym_name
, sym_len
, 1,
1756 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1757 &objfile
->static_psymbols
,
1759 psymtab_language
, objfile
);
1762 /* Also a typedef with the same name. */
1763 add_psymbol_to_list (sym_name
, sym_len
, 1,
1764 VAR_DOMAIN
, LOC_TYPEDEF
,
1765 &objfile
->static_psymbols
,
1767 psymtab_language
, objfile
);
1774 if (p
!= namestring
) /* a name is there, not just :T... */
1776 add_psymbol_to_list (sym_name
, sym_len
, 1,
1777 VAR_DOMAIN
, LOC_TYPEDEF
,
1778 &objfile
->static_psymbols
,
1780 psymtab_language
, objfile
);
1783 /* If this is an enumerated type, we need to
1784 add all the enum constants to the partial symbol
1785 table. This does not cover enums without names, e.g.
1786 "enum {a, b} c;" in C, but fortunately those are
1787 rare. There is no way for GDB to find those from the
1788 enum type without spending too much time on it. Thus
1789 to solve this problem, the compiler needs to put out the
1790 enum in a nameless type. GCC2 does this. */
1792 /* We are looking for something of the form
1793 <name> ":" ("t" | "T") [<number> "="] "e"
1794 {<constant> ":" <value> ","} ";". */
1796 /* Skip over the colon and the 't' or 'T'. */
1798 /* This type may be given a number. Also, numbers can come
1799 in pairs like (0,26). Skip over it. */
1800 while ((*p
>= '0' && *p
<= '9')
1801 || *p
== '(' || *p
== ',' || *p
== ')'
1807 /* The aix4 compiler emits extra crud before the members. */
1810 /* Skip over the type (?). */
1814 /* Skip over the colon. */
1818 /* We have found an enumerated type. */
1819 /* According to comments in read_enum_type
1820 a comma could end it instead of a semicolon.
1821 I don't know where that happens.
1823 while (*p
&& *p
!= ';' && *p
!= ',')
1827 /* Check for and handle cretinous dbx symbol name
1829 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1830 p
= next_symbol_text (objfile
);
1832 /* Point to the character after the name
1833 of the enum constant. */
1834 for (q
= p
; *q
&& *q
!= ':'; q
++)
1836 /* Note that the value doesn't matter for
1837 enum constants in psymtabs, just in symtabs. */
1838 add_psymbol_to_list (p
, q
- p
, 1,
1839 VAR_DOMAIN
, LOC_CONST
,
1840 &objfile
->static_psymbols
, 0,
1841 0, psymtab_language
, objfile
);
1842 /* Point past the name. */
1844 /* Skip over the value. */
1845 while (*p
&& *p
!= ',')
1847 /* Advance past the comma. */
1855 /* Constant, e.g. from "const" in Pascal. */
1856 add_psymbol_to_list (sym_name
, sym_len
, 1,
1857 VAR_DOMAIN
, LOC_CONST
,
1858 &objfile
->static_psymbols
, nlist
.n_value
,
1859 0, psymtab_language
, objfile
);
1865 int name_len
= p
- namestring
;
1866 char *name
= xmalloc (name_len
+ 1);
1868 memcpy (name
, namestring
, name_len
);
1869 name
[name_len
] = '\0';
1870 function_outside_compilation_unit_complaint (name
);
1873 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1874 SECT_OFF_TEXT (objfile
));
1875 /* Kludges for ELF/STABS with Sun ACC. */
1876 last_function_name
= namestring
;
1877 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1878 value for the bottom of the text seg in those cases. */
1879 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1880 SECT_OFF_TEXT (objfile
))
1881 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1883 CORE_ADDR minsym_valu
=
1884 find_stab_function_addr (namestring
,
1885 pst
? pst
->filename
: NULL
,
1888 /* find_stab_function_addr will return 0 if the minimal
1889 symbol wasn't found. (Unfortunately, this might also
1890 be a valid address.) Anyway, if it *does* return 0,
1891 it is likely that the value was set correctly to begin
1893 if (minsym_valu
!= 0)
1894 nlist
.n_value
= minsym_valu
;
1896 if (pst
&& textlow_not_set
1897 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1899 pst
->textlow
= nlist
.n_value
;
1900 textlow_not_set
= 0;
1904 /* Keep track of the start of the last function so we
1905 can handle end of function symbols. */
1906 last_function_start
= nlist
.n_value
;
1908 /* In reordered executables this function may lie outside
1909 the bounds created by N_SO symbols. If that's the case
1910 use the address of this function as the low bound for
1911 the partial symbol table. */
1914 || (nlist
.n_value
< pst
->textlow
1916 != ANOFFSET (objfile
->section_offsets
,
1917 SECT_OFF_TEXT (objfile
))))))
1919 pst
->textlow
= nlist
.n_value
;
1920 textlow_not_set
= 0;
1922 add_psymbol_to_list (sym_name
, sym_len
, 1,
1923 VAR_DOMAIN
, LOC_BLOCK
,
1924 &objfile
->static_psymbols
,
1926 psymtab_language
, objfile
);
1929 /* Global functions were ignored here, but now they
1930 are put into the global psymtab like one would expect.
1931 They're also in the minimal symbol table. */
1935 int name_len
= p
- namestring
;
1936 char *name
= xmalloc (name_len
+ 1);
1938 memcpy (name
, namestring
, name_len
);
1939 name
[name_len
] = '\0';
1940 function_outside_compilation_unit_complaint (name
);
1943 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1944 SECT_OFF_TEXT (objfile
));
1945 /* Kludges for ELF/STABS with Sun ACC. */
1946 last_function_name
= namestring
;
1947 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1948 value for the bottom of the text seg in those cases. */
1949 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1950 SECT_OFF_TEXT (objfile
))
1951 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1953 CORE_ADDR minsym_valu
=
1954 find_stab_function_addr (namestring
,
1955 pst
? pst
->filename
: NULL
,
1958 /* find_stab_function_addr will return 0 if the minimal
1959 symbol wasn't found. (Unfortunately, this might also
1960 be a valid address.) Anyway, if it *does* return 0,
1961 it is likely that the value was set correctly to begin
1963 if (minsym_valu
!= 0)
1964 nlist
.n_value
= minsym_valu
;
1966 if (pst
&& textlow_not_set
1967 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1969 pst
->textlow
= nlist
.n_value
;
1970 textlow_not_set
= 0;
1974 /* Keep track of the start of the last function so we
1975 can handle end of function symbols. */
1976 last_function_start
= nlist
.n_value
;
1978 /* In reordered executables this function may lie outside
1979 the bounds created by N_SO symbols. If that's the case
1980 use the address of this function as the low bound for
1981 the partial symbol table. */
1984 || (nlist
.n_value
< pst
->textlow
1986 != ANOFFSET (objfile
->section_offsets
,
1987 SECT_OFF_TEXT (objfile
))))))
1989 pst
->textlow
= nlist
.n_value
;
1990 textlow_not_set
= 0;
1992 add_psymbol_to_list (sym_name
, sym_len
, 1,
1993 VAR_DOMAIN
, LOC_BLOCK
,
1994 &objfile
->global_psymbols
,
1996 psymtab_language
, objfile
);
1999 /* Two things show up here (hopefully); static symbols of
2000 local scope (static used inside braces) or extensions
2001 of structure symbols. We can ignore both. */
2015 case '#': /* For symbol identification (used in live ranges). */
2019 /* It is a C++ nested symbol. We don't need to record it
2020 (I don't think); if we try to look up foo::bar::baz,
2021 then symbols for the symtab containing foo should get
2022 read in, I think. */
2023 /* Someone says sun cc puts out symbols like
2024 /foo/baz/maclib::/usr/local/bin/maclib,
2025 which would get here with a symbol type of ':'. */
2029 /* Unexpected symbol descriptor. The second and subsequent stabs
2030 of a continued stab can show up here. The question is
2031 whether they ever can mimic a normal stab--it would be
2032 nice if not, since we certainly don't want to spend the
2033 time searching to the end of every string looking for
2036 complaint (&symfile_complaints
,
2037 _("unknown symbol descriptor `%c'"),
2040 /* Ignore it; perhaps it is an extension that we don't
2048 namestring
= set_namestring (objfile
, &nlist
);
2050 /* Find the corresponding bincl and mark that psymtab on the
2051 psymtab dependency list. */
2053 struct partial_symtab
*needed_pst
=
2054 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2056 /* If this include file was defined earlier in this file,
2058 if (needed_pst
== pst
)
2066 for (i
= 0; i
< dependencies_used
; i
++)
2067 if (dependency_list
[i
] == needed_pst
)
2073 /* If it's already in the list, skip the rest. */
2077 dependency_list
[dependencies_used
++] = needed_pst
;
2078 if (dependencies_used
>= dependencies_allocated
)
2080 struct partial_symtab
**orig
= dependency_list
;
2083 (struct partial_symtab
**)
2084 alloca ((dependencies_allocated
*= 2)
2085 * sizeof (struct partial_symtab
*));
2086 memcpy (dependency_list
, orig
,
2088 * sizeof (struct partial_symtab
*)));
2090 fprintf_unfiltered (gdb_stderr
,
2091 "Had to reallocate "
2092 "dependency list.\n");
2093 fprintf_unfiltered (gdb_stderr
,
2094 "New dependencies allocated: %d\n",
2095 dependencies_allocated
);
2103 /* Solaris 2 end of module, finish current partial symbol table.
2104 end_psymtab will set pst->texthigh to the proper value, which
2105 is necessary if a module compiled without debugging info
2106 follows this module. */
2107 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2109 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2110 symnum
* symbol_size
,
2111 (CORE_ADDR
) 0, dependency_list
,
2112 dependencies_used
, textlow_not_set
);
2113 pst
= (struct partial_symtab
*) 0;
2115 dependencies_used
= 0;
2116 has_line_numbers
= 0;
2122 HANDLE_RBRAC (nlist
.n_value
);
2128 case N_SSYM
: /* Claim: Structure or union element.
2129 Hopefully, I can ignore this. */
2130 case N_ENTRY
: /* Alternate entry point; can ignore. */
2131 case N_MAIN
: /* Can definitely ignore this. */
2132 case N_CATCH
: /* These are GNU C++ extensions */
2133 case N_EHDECL
: /* that can safely be ignored here. */
2143 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2144 case N_DEFD
: /* GNU Modula-2 */
2145 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2147 case N_OBJ
: /* Useless types from Solaris. */
2150 /* These symbols aren't interesting; don't worry about them. */
2154 /* If we haven't found it yet, ignore it. It's probably some
2155 new type we don't know about yet. */
2156 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2161 /* If there's stuff to be cleaned up, clean it up. */
2164 /* Don't set pst->texthigh lower than it already is. */
2165 CORE_ADDR text_end
=
2166 (lowest_text_address
== (CORE_ADDR
) -1
2167 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2168 SECT_OFF_TEXT (objfile
)))
2169 : lowest_text_address
)
2172 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2173 symnum
* symbol_size
,
2174 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2175 dependency_list
, dependencies_used
, textlow_not_set
);
2178 do_cleanups (back_to
);
2181 /* Allocate and partially fill a partial symtab. It will be
2182 completely filled at the end of the symbol list.
2184 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2185 is the address relative to which its symbols are (incremental) or 0
2188 static struct partial_symtab
*
2189 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2190 int ldsymoff
, struct partial_symbol
**global_syms
,
2191 struct partial_symbol
**static_syms
)
2193 struct partial_symtab
*result
=
2194 start_psymtab_common (objfile
, objfile
->section_offsets
,
2195 filename
, textlow
, global_syms
, static_syms
);
2197 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2198 sizeof (struct symloc
));
2199 LDSYMOFF (result
) = ldsymoff
;
2200 result
->read_symtab
= dbx_psymtab_to_symtab
;
2201 SYMBOL_SIZE (result
) = symbol_size
;
2202 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2203 STRING_OFFSET (result
) = string_table_offset
;
2204 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2207 /* If we're handling an ELF file, drag some section-relocation info
2208 for this source file out of the ELF symbol table, to compensate for
2209 Sun brain death. This replaces the section_offsets in this psymtab,
2211 elfstab_offset_sections (objfile
, result
);
2214 /* Deduce the source language from the filename for this psymtab. */
2215 psymtab_language
= deduce_language_from_filename (filename
);
2220 /* Close off the current usage of PST.
2221 Returns PST or NULL if the partial symtab was empty and thrown away.
2223 FIXME: List variables and peculiarities of same. */
2225 struct partial_symtab
*
2226 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2227 int capping_symbol_offset
, CORE_ADDR capping_text
,
2228 struct partial_symtab
**dependency_list
, int number_dependencies
,
2229 int textlow_not_set
)
2232 struct objfile
*objfile
= pst
->objfile
;
2233 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2235 if (capping_symbol_offset
!= -1)
2236 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2237 pst
->texthigh
= capping_text
;
2239 /* Under Solaris, the N_SO symbols always have a value of 0,
2240 instead of the usual address of the .o file. Therefore,
2241 we have to do some tricks to fill in texthigh and textlow.
2242 The first trick is: if we see a static
2243 or global function, and the textlow for the current pst
2244 is not set (ie: textlow_not_set), then we use that function's
2245 address for the textlow of the pst. */
2247 /* Now, to fill in texthigh, we remember the last function seen
2248 in the .o file. Also, there's a hack in
2249 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2250 to here via the misc_info field. Therefore, we can fill in
2251 a reliable texthigh by taking the address plus size of the
2252 last function in the file. */
2254 if (pst
->texthigh
== 0 && last_function_name
2255 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2259 struct minimal_symbol
*minsym
;
2261 p
= strchr (last_function_name
, ':');
2263 p
= last_function_name
;
2264 n
= p
- last_function_name
;
2266 strncpy (p
, last_function_name
, n
);
2269 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2272 /* Sun Fortran appends an underscore to the minimal symbol name,
2273 try again with an appended underscore if the minimal symbol
2277 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2281 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2283 last_function_name
= NULL
;
2286 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2288 /* This test will be true if the last .o file is only data. */
2289 else if (textlow_not_set
)
2290 pst
->textlow
= pst
->texthigh
;
2293 struct partial_symtab
*p1
;
2295 /* If we know our own starting text address, then walk through all other
2296 psymtabs for this objfile, and if any didn't know their ending text
2297 address, set it to our starting address. Take care to not set our
2298 own ending address to our starting address, nor to set addresses on
2299 `dependency' files that have both textlow and texthigh zero. */
2301 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2303 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2305 p1
->texthigh
= pst
->textlow
;
2306 /* If this file has only data, then make textlow match
2308 if (p1
->textlow
== 0)
2309 p1
->textlow
= p1
->texthigh
;
2314 /* End of kludge for patching Solaris textlow and texthigh. */
2316 pst
->n_global_syms
=
2317 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2318 + pst
->globals_offset
);
2319 pst
->n_static_syms
=
2320 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2321 + pst
->statics_offset
);
2323 pst
->number_of_dependencies
= number_dependencies
;
2324 if (number_dependencies
)
2326 pst
->dependencies
= (struct partial_symtab
**)
2327 obstack_alloc (&objfile
->objfile_obstack
,
2328 number_dependencies
* sizeof (struct partial_symtab
*));
2329 memcpy (pst
->dependencies
, dependency_list
,
2330 number_dependencies
* sizeof (struct partial_symtab
*));
2333 pst
->dependencies
= 0;
2335 for (i
= 0; i
< num_includes
; i
++)
2337 struct partial_symtab
*subpst
=
2338 allocate_psymtab (include_list
[i
], objfile
);
2340 /* Copy the sesction_offsets array from the main psymtab. */
2341 subpst
->section_offsets
= pst
->section_offsets
;
2342 subpst
->read_symtab_private
=
2343 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2347 subpst
->texthigh
= 0;
2349 /* We could save slight bits of space by only making one of these,
2350 shared by the entire set of include files. FIXME-someday. */
2351 subpst
->dependencies
= (struct partial_symtab
**)
2352 obstack_alloc (&objfile
->objfile_obstack
,
2353 sizeof (struct partial_symtab
*));
2354 subpst
->dependencies
[0] = pst
;
2355 subpst
->number_of_dependencies
= 1;
2357 subpst
->globals_offset
=
2358 subpst
->n_global_syms
=
2359 subpst
->statics_offset
=
2360 subpst
->n_static_syms
= 0;
2364 subpst
->read_symtab
= pst
->read_symtab
;
2367 sort_pst_symbols (pst
);
2369 if (num_includes
== 0
2370 && number_dependencies
== 0
2371 && pst
->n_global_syms
== 0
2372 && pst
->n_static_syms
== 0
2373 && has_line_numbers
== 0)
2375 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2376 it is on the obstack, but we can forget to chain it on the list. */
2377 /* Empty psymtabs happen as a result of header files which don't have
2378 any symbols in them. There can be a lot of them. But this check
2379 is wrong, in that a psymtab with N_SLINE entries but nothing else
2380 is not empty, but we don't realize that. Fixing that without slowing
2381 things down might be tricky. */
2383 discard_psymtab (pst
);
2385 /* Indicate that psymtab was thrown away. */
2386 pst
= (struct partial_symtab
*) NULL
;
2392 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2394 struct cleanup
*old_chain
;
2402 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2403 "Shouldn't happen.\n",
2408 /* Read in all partial symtabs on which this one is dependent. */
2409 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2410 if (!pst
->dependencies
[i
]->readin
)
2412 /* Inform about additional files that need to be read in. */
2415 fputs_filtered (" ", gdb_stdout
);
2417 fputs_filtered ("and ", gdb_stdout
);
2419 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2420 wrap_here (""); /* Flush output. */
2421 gdb_flush (gdb_stdout
);
2423 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2426 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2428 /* Init stuff necessary for reading in symbols */
2431 old_chain
= make_cleanup (really_free_pendings
, 0);
2432 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2433 symbol_size
= SYMBOL_SIZE (pst
);
2435 /* Read in this file's symbols. */
2436 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2437 read_ofile_symtab (pst
);
2439 do_cleanups (old_chain
);
2445 /* Read in all of the symbols for a given psymtab for real.
2446 Be verbose about it if the user wants that. */
2449 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2452 struct cleanup
*back_to
= NULL
;
2459 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2460 "Shouldn't happen.\n",
2465 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2467 /* Print the message now, before reading the string table,
2468 to avoid disconcerting pauses. */
2471 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2472 gdb_flush (gdb_stdout
);
2475 sym_bfd
= pst
->objfile
->obfd
;
2477 next_symbol_text_func
= dbx_next_symbol_text
;
2479 if (DBX_STAB_SECTION (pst
->objfile
))
2482 = symfile_relocate_debug_section (pst
->objfile
,
2483 DBX_STAB_SECTION (pst
->objfile
),
2487 back_to
= make_cleanup (free_current_contents
,
2488 (void *) &stabs_data
);
2491 dbx_psymtab_to_symtab_1 (pst
);
2494 do_cleanups (back_to
);
2496 /* Match with global symbols. This only needs to be done once,
2497 after all of the symtabs and dependencies have been read in. */
2498 scan_file_globals (pst
->objfile
);
2500 /* Finish up the debug error message. */
2502 printf_filtered ("done.\n");
2506 /* Read in a defined section of a specific object file's symbols. */
2509 read_ofile_symtab (struct partial_symtab
*pst
)
2512 struct external_nlist
*bufp
;
2513 struct internal_nlist nlist
;
2515 unsigned max_symnum
;
2517 struct objfile
*objfile
;
2518 int sym_offset
; /* Offset to start of symbols to read */
2519 int sym_size
; /* Size of symbols to read */
2520 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2521 int text_size
; /* Size of text segment for symbols */
2522 struct section_offsets
*section_offsets
;
2524 objfile
= pst
->objfile
;
2525 sym_offset
= LDSYMOFF (pst
);
2526 sym_size
= LDSYMLEN (pst
);
2527 text_offset
= pst
->textlow
;
2528 text_size
= pst
->texthigh
- pst
->textlow
;
2529 /* This cannot be simply objfile->section_offsets because of
2530 elfstab_offset_sections() which initializes the psymtab section
2531 offsets information in a special way, and that is different from
2532 objfile->section_offsets. */
2533 section_offsets
= pst
->section_offsets
;
2535 current_objfile
= objfile
;
2536 subfile_stack
= NULL
;
2538 stringtab_global
= DBX_STRINGTAB (objfile
);
2539 last_source_file
= NULL
;
2541 abfd
= objfile
->obfd
;
2542 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2543 symbuf_end
= symbuf_idx
= 0;
2545 symbuf_left
= sym_offset
+ sym_size
;
2547 /* It is necessary to actually read one symbol *before* the start
2548 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2549 occurs before the N_SO symbol.
2551 Detecting this in read_dbx_symtab
2552 would slow down initial readin, so we look for it here instead. */
2553 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2555 stabs_seek (sym_offset
- symbol_size
);
2557 bufp
= &symbuf
[symbuf_idx
++];
2558 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2559 OBJSTAT (objfile
, n_stabs
++);
2561 namestring
= set_namestring (objfile
, &nlist
);
2563 processing_gcc_compilation
= 0;
2564 if (nlist
.n_type
== N_TEXT
)
2566 const char *tempstring
= namestring
;
2568 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2569 processing_gcc_compilation
= 1;
2570 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2571 processing_gcc_compilation
= 2;
2572 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2574 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2575 processing_gcc_compilation
= 2;
2578 /* Try to select a C++ demangling based on the compilation unit
2582 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2583 know whether it will use the old style or v3 mangling. */
2584 if (processing_gcc_compilation
)
2586 if (AUTO_DEMANGLING
)
2588 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2595 /* The N_SO starting this symtab is the first symbol, so we
2596 better not check the symbol before it. I'm not this can
2597 happen, but it doesn't hurt to check for it. */
2598 stabs_seek (sym_offset
);
2599 processing_gcc_compilation
= 0;
2602 if (symbuf_idx
== symbuf_end
)
2604 bufp
= &symbuf
[symbuf_idx
];
2605 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2606 error (_("First symbol in segment of executable not a source symbol"));
2608 max_symnum
= sym_size
/ symbol_size
;
2611 symnum
< max_symnum
;
2614 QUIT
; /* Allow this to be interruptable. */
2615 if (symbuf_idx
== symbuf_end
)
2617 bufp
= &symbuf
[symbuf_idx
++];
2618 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2619 OBJSTAT (objfile
, n_stabs
++);
2621 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2623 namestring
= set_namestring (objfile
, &nlist
);
2627 if (sizeof (nlist
.n_value
) > 4
2628 /* We are a 64-bit debugger debugging a 32-bit program. */
2629 && (type
== N_LSYM
|| type
== N_PSYM
))
2630 /* We have to be careful with the n_value in the case of N_LSYM
2631 and N_PSYM entries, because they are signed offsets from frame
2632 pointer, but we actually read them as unsigned 32-bit values.
2633 This is not a problem for 32-bit debuggers, for which negative
2634 values end up being interpreted correctly (as negative
2635 offsets) due to integer overflow.
2636 But we need to sign-extend the value for 64-bit debuggers,
2637 or we'll end up interpreting negative values as very large
2638 positive offsets. */
2639 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2640 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2641 namestring
, section_offsets
, objfile
);
2643 /* We skip checking for a new .o or -l file; that should never
2644 happen in this routine. */
2645 else if (type
== N_TEXT
)
2647 /* I don't think this code will ever be executed, because
2648 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2649 the N_SO symbol which starts this source file.
2650 However, there is no reason not to accept
2651 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2653 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2654 processing_gcc_compilation
= 1;
2655 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2656 processing_gcc_compilation
= 2;
2659 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2660 know whether it will use the old style or v3 mangling. */
2661 if (AUTO_DEMANGLING
)
2663 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2667 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2668 || type
== (unsigned char) N_NBTEXT
)
2670 /* Global symbol: see if we came across a dbx defintion for
2671 a corresponding symbol. If so, store the value. Remove
2672 syms from the chain when their values are stored, but
2673 search the whole chain, as there may be several syms from
2674 different files with the same name. */
2675 /* This is probably not true. Since the files will be read
2676 in one at a time, each reference to a global symbol will
2677 be satisfied in each file as it appears. So we skip this
2683 /* In a Solaris elf file, this variable, which comes from the
2684 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2685 which comes from pst->textlow is correct. */
2686 if (last_source_start_addr
== 0)
2687 last_source_start_addr
= text_offset
;
2689 /* In reordered executables last_source_start_addr may not be the
2690 lower bound for this symtab, instead use text_offset which comes
2691 from pst->textlow which is correct. */
2692 if (last_source_start_addr
> text_offset
)
2693 last_source_start_addr
= text_offset
;
2695 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2696 SECT_OFF_TEXT (objfile
));
2700 current_objfile
= NULL
;
2704 /* This handles a single symbol from the symbol-file, building symbols
2705 into a GDB symtab. It takes these arguments and an implicit argument.
2707 TYPE is the type field of the ".stab" symbol entry.
2708 DESC is the desc field of the ".stab" entry.
2709 VALU is the value field of the ".stab" entry.
2710 NAME is the symbol name, in our address space.
2711 SECTION_OFFSETS is a set of amounts by which the sections of this
2712 object file were relocated when it was loaded into memory. Note
2713 that these section_offsets are not the objfile->section_offsets but
2714 the pst->section_offsets. All symbols that refer to memory
2715 locations need to be offset by these amounts.
2716 OBJFILE is the object file from which we are reading symbols. It
2717 is used in end_symtab. */
2720 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2721 struct section_offsets
*section_offsets
,
2722 struct objfile
*objfile
)
2724 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2725 struct context_stack
*new;
2726 /* This remembers the address of the start of a function. It is
2727 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2728 are relative to the current function's start address. On systems
2729 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2730 and is used to relocate these symbol types rather than
2732 static CORE_ADDR function_start_offset
;
2734 /* This holds the address of the start of a function, without the
2735 system peculiarities of function_start_offset. */
2736 static CORE_ADDR last_function_start
;
2738 /* If this is nonzero, we've seen an N_SLINE since the start of the
2739 current function. We use this to tell us to move the first sline
2740 to the beginning of the function regardless of what its given
2742 static int sline_found_in_function
= 1;
2744 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2745 source file. Used to detect the SunPRO solaris compiler. */
2746 static int n_opt_found
;
2748 /* The stab type used for the definition of the last function.
2749 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2750 static int function_stab_type
= 0;
2752 if (!block_address_function_relative
)
2754 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2755 function start address, so just use the text offset. */
2756 function_start_offset
=
2757 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2760 /* Something is wrong if we see real data before seeing a source
2763 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2765 /* Ignore any symbols which appear before an N_SO symbol.
2766 Currently no one puts symbols there, but we should deal
2767 gracefully with the case. A complain()t might be in order,
2768 but this should not be an error (). */
2777 if (*name
== '\000')
2779 /* This N_FUN marks the end of a function. This closes off
2780 the current block. */
2781 struct block
*block
;
2783 if (context_stack_depth
<= 0)
2785 lbrac_mismatch_complaint (symnum
);
2789 /* The following check is added before recording line 0 at
2790 end of function so as to handle hand-generated stabs
2791 which may have an N_FUN stabs at the end of the function,
2792 but no N_SLINE stabs. */
2793 if (sline_found_in_function
)
2795 CORE_ADDR addr
= last_function_start
+ valu
;
2797 record_line (current_subfile
, 0,
2798 gdbarch_addr_bits_remove (gdbarch
, addr
));
2801 within_function
= 0;
2802 new = pop_context ();
2804 /* Make a block for the local symbols within. */
2805 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2806 new->start_addr
, new->start_addr
+ valu
,
2809 /* For C++, set the block's scope. */
2810 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2811 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2814 /* May be switching to an assembler file which may not be using
2815 block relative stabs, so reset the offset. */
2816 if (block_address_function_relative
)
2817 function_start_offset
= 0;
2822 sline_found_in_function
= 0;
2824 /* Relocate for dynamic loading. */
2825 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2826 valu
= gdbarch_smash_text_address (gdbarch
, valu
);
2827 last_function_start
= valu
;
2829 goto define_a_symbol
;
2832 /* This "symbol" just indicates the start of an inner lexical
2833 context within a function. */
2835 /* Ignore extra outermost context from SunPRO cc and acc. */
2836 if (n_opt_found
&& desc
== 1)
2839 if (block_address_function_relative
)
2840 /* Relocate for Sun ELF acc fn-relative syms. */
2841 valu
+= function_start_offset
;
2843 /* On most machines, the block addresses are relative to the
2844 N_SO, the linker did not relocate them (sigh). */
2845 valu
+= last_source_start_addr
;
2847 push_context (desc
, valu
);
2851 /* This "symbol" just indicates the end of an inner lexical
2852 context that was started with N_LBRAC. */
2854 /* Ignore extra outermost context from SunPRO cc and acc. */
2855 if (n_opt_found
&& desc
== 1)
2858 if (block_address_function_relative
)
2859 /* Relocate for Sun ELF acc fn-relative syms. */
2860 valu
+= function_start_offset
;
2862 /* On most machines, the block addresses are relative to the
2863 N_SO, the linker did not relocate them (sigh). */
2864 valu
+= last_source_start_addr
;
2866 if (context_stack_depth
<= 0)
2868 lbrac_mismatch_complaint (symnum
);
2872 new = pop_context ();
2873 if (desc
!= new->depth
)
2874 lbrac_mismatch_complaint (symnum
);
2876 if (local_symbols
!= NULL
)
2878 /* GCC development snapshots from March to December of
2879 2000 would output N_LSYM entries after N_LBRAC
2880 entries. As a consequence, these symbols are simply
2881 discarded. Complain if this is the case. */
2882 complaint (&symfile_complaints
,
2883 _("misplaced N_LBRAC entry; discarding local "
2884 "symbols which have no enclosing block"));
2886 local_symbols
= new->locals
;
2888 if (context_stack_depth
> 1)
2890 /* This is not the outermost LBRAC...RBRAC pair in the
2891 function, its local symbols preceded it, and are the ones
2892 just recovered from the context stack. Define the block
2893 for them (but don't bother if the block contains no
2894 symbols. Should we complain on blocks without symbols?
2895 I can't think of any useful purpose for them). */
2896 if (local_symbols
!= NULL
)
2898 /* Muzzle a compiler bug that makes end < start.
2900 ??? Which compilers? Is this ever harmful?. */
2901 if (new->start_addr
> valu
)
2903 complaint (&symfile_complaints
,
2904 _("block start larger than block end"));
2905 new->start_addr
= valu
;
2907 /* Make a block for the local symbols within. */
2908 finish_block (0, &local_symbols
, new->old_blocks
,
2909 new->start_addr
, valu
, objfile
);
2914 /* This is the outermost LBRAC...RBRAC pair. There is no
2915 need to do anything; leave the symbols that preceded it
2916 to be attached to the function's own block. We need to
2917 indicate that we just moved outside of the function. */
2918 within_function
= 0;
2925 /* This kind of symbol indicates the start of an object file.
2926 Relocate for dynamic loading. */
2927 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2931 /* This type of symbol indicates the start of data for one
2932 source file. Finish the symbol table of the previous source
2933 file (if any) and start accumulating a new symbol table.
2934 Relocate for dynamic loading. */
2935 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2939 if (last_source_file
)
2941 /* Check if previous symbol was also an N_SO (with some
2942 sanity checks). If so, that one was actually the
2943 directory name, and the current one is the real file
2944 name. Patch things up. */
2945 if (previous_stab_code
== (unsigned char) N_SO
)
2947 patch_subfile_names (current_subfile
, name
);
2948 break; /* Ignore repeated SOs. */
2950 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2954 /* Null name means this just marks the end of text for this .o
2955 file. Don't start a new symtab in this case. */
2956 if (*name
== '\000')
2959 if (block_address_function_relative
)
2960 function_start_offset
= 0;
2963 start_symtab (name
, NULL
, valu
);
2964 record_debugformat ("stabs");
2968 /* This type of symbol indicates the start of data for a
2969 sub-source-file, one whose contents were copied or included
2970 in the compilation of the main source file (whose name was
2971 given in the N_SO symbol). Relocate for dynamic loading. */
2972 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2973 start_subfile (name
, current_subfile
->dirname
);
2978 add_new_header_file (name
, valu
);
2979 start_subfile (name
, current_subfile
->dirname
);
2983 start_subfile (pop_subfile (), current_subfile
->dirname
);
2987 add_old_header_file (name
, valu
);
2991 /* This type of "symbol" really just records one line-number --
2992 core-address correspondence. Enter it in the line list for
2993 this symbol table. */
2995 /* Relocate for dynamic loading and for ELF acc
2996 function-relative symbols. */
2997 valu
+= function_start_offset
;
2999 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3000 middle of the prologue instead of right at the start of the
3001 function. To deal with this we record the address for the
3002 first N_SLINE stab to be the start of the function instead of
3003 the listed location. We really shouldn't to this. When
3004 compiling with optimization, this first N_SLINE stab might be
3005 optimized away. Other (non-GCC) compilers don't emit this
3006 stab at all. There is no real harm in having an extra
3007 numbered line, although it can be a bit annoying for the
3008 user. However, it totally screws up our testsuite.
3010 So for now, keep adjusting the address of the first N_SLINE
3011 stab, but only for code compiled with GCC. */
3013 if (within_function
&& sline_found_in_function
== 0)
3015 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
3016 last_function_start
: valu
;
3018 record_line (current_subfile
, desc
,
3019 gdbarch_addr_bits_remove (gdbarch
, addr
));
3020 sline_found_in_function
= 1;
3023 record_line (current_subfile
, desc
,
3024 gdbarch_addr_bits_remove (gdbarch
, valu
));
3028 common_block_start (name
, objfile
);
3032 common_block_end (objfile
);
3035 /* The following symbol types need to have the appropriate
3036 offset added to their value; then we process symbol
3037 definitions in the name. */
3039 case N_STSYM
: /* Static symbol in data segment. */
3040 case N_LCSYM
: /* Static symbol in BSS segment. */
3041 case N_ROSYM
: /* Static symbol in read-only data segment. */
3042 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3043 Solaris 2's stabs-in-elf makes *most* symbols relative but
3044 leaves a few absolute (at least for Solaris 2.1 and version
3045 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3046 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3047 relocates it) .stab "foo:V...",N_STSYM is relative (section
3048 base subtracted). This leaves us no choice but to search for
3049 the 'S' or 'V'... (or pass the whole section_offsets stuff
3050 down ONE MORE function call level, which we really don't want
3055 /* Normal object file and NLMs have non-zero text seg offsets,
3056 but don't need their static syms offset in this fashion.
3057 XXX - This is really a crock that should be fixed in the
3058 solib handling code so that I don't have to work around it
3061 if (!symfile_relocatable
)
3063 p
= strchr (name
, ':');
3064 if (p
!= 0 && p
[1] == 'S')
3066 /* The linker relocated it. We don't want to add an
3067 elfstab_offset_sections-type offset, but we *do*
3068 want to add whatever solib.c passed to
3069 symbol_file_add as addr (this is known to affect
3070 SunOS 4, and I suspect ELF too). Since
3071 elfstab_offset_sections currently does not muck
3072 with the text offset (there is no Ttext.text
3073 symbol), we can get addr from the text offset. If
3074 elfstab_offset_sections ever starts dealing with
3075 the text offset, and we still need to do this, we
3076 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3077 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3078 goto define_a_symbol
;
3081 /* Since it's not the kludge case, re-dispatch to the right
3092 internal_error (__FILE__
, __LINE__
,
3093 _("failed internal consistency check"));
3097 case_N_STSYM
: /* Static symbol in data segment. */
3098 case N_DSLINE
: /* Source line number, data segment. */
3099 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3100 goto define_a_symbol
;
3102 case_N_LCSYM
: /* Static symbol in BSS segment. */
3103 case N_BSLINE
: /* Source line number, BSS segment. */
3104 /* N_BROWS: overlaps with N_BSLINE. */
3105 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3106 goto define_a_symbol
;
3108 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3109 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3110 goto define_a_symbol
;
3112 case N_ENTRY
: /* Alternate entry point. */
3113 /* Relocate for dynamic loading. */
3114 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3115 goto define_a_symbol
;
3117 /* The following symbol types we don't know how to process.
3118 Handle them in a "default" way, but complain to people who
3121 case N_CATCH
: /* Exception handler catcher. */
3122 case N_EHDECL
: /* Exception handler name. */
3123 case N_PC
: /* Global symbol in Pascal. */
3124 case N_M2C
: /* Modula-2 compilation unit. */
3125 /* N_MOD2: overlaps with N_EHDECL. */
3126 case N_SCOPE
: /* Modula-2 scope information. */
3127 case N_ECOML
: /* End common (local name). */
3128 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3133 unknown_symtype_complaint (hex_string (type
));
3136 /* The following symbol types don't need the address field
3137 relocated, since it is either unused, or is absolute. */
3139 case N_GSYM
: /* Global variable. */
3140 case N_NSYMS
: /* Number of symbols (Ultrix). */
3141 case N_NOMAP
: /* No map? (Ultrix). */
3142 case N_RSYM
: /* Register variable. */
3143 case N_DEFD
: /* Modula-2 GNU module dependency. */
3144 case N_SSYM
: /* Struct or union element. */
3145 case N_LSYM
: /* Local symbol in stack. */
3146 case N_PSYM
: /* Parameter variable. */
3147 case N_LENG
: /* Length of preceding symbol type. */
3151 char *colon_pos
= strchr (name
, ':');
3153 if (colon_pos
== NULL
)
3156 deftype
= colon_pos
[1];
3162 function_stab_type
= type
;
3164 /* Deal with the SunPRO 3.0 compiler which omits the
3165 address from N_FUN symbols. */
3167 && valu
== ANOFFSET (section_offsets
,
3168 SECT_OFF_TEXT (objfile
))
3169 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3171 CORE_ADDR minsym_valu
=
3172 find_stab_function_addr (name
, last_source_file
, objfile
);
3174 /* The function find_stab_function_addr will return
3175 0 if the minimal symbol wasn't found.
3176 (Unfortunately, this might also be a valid
3177 address.) Anyway, if it *does* return 0, it is
3178 likely that the value was set correctly to begin
3180 if (minsym_valu
!= 0)
3184 if (block_address_function_relative
)
3185 /* For Solaris 2 compilers, the block addresses and
3186 N_SLINE's are relative to the start of the
3187 function. On normal systems, and when using GCC on
3188 Solaris 2, these addresses are just absolute, or
3189 relative to the N_SO, depending on
3190 BLOCK_ADDRESS_ABSOLUTE. */
3191 function_start_offset
= valu
;
3193 within_function
= 1;
3195 if (context_stack_depth
> 1)
3197 complaint (&symfile_complaints
,
3198 _("unmatched N_LBRAC before symtab pos %d"),
3203 if (context_stack_depth
> 0)
3205 struct block
*block
;
3207 new = pop_context ();
3208 /* Make a block for the local symbols within. */
3209 block
= finish_block (new->name
, &local_symbols
,
3210 new->old_blocks
, new->start_addr
,
3213 /* For C++, set the block's scope. */
3214 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3215 cp_set_block_scope (new->name
, block
,
3216 &objfile
->objfile_obstack
,
3220 new = push_context (0, valu
);
3221 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3225 define_symbol (valu
, name
, desc
, type
, objfile
);
3231 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3232 for a bunch of other flags, too. Someday we may parse their
3233 flags; for now we ignore theirs and hope they'll ignore ours. */
3234 case N_OPT
: /* Solaris 2: Compiler options. */
3237 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3239 processing_gcc_compilation
= 2;
3240 #if 0 /* Works, but is experimental. -fnf */
3241 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3242 we don't know whether it will use the old style or v3
3244 if (AUTO_DEMANGLING
)
3246 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3255 case N_MAIN
: /* Name of main routine. */
3256 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3257 it with a symbol file with "main" and without N_MAIN. I'm
3258 not sure exactly what rule to follow but probably something
3259 like: N_MAIN takes precedence over "main" no matter what
3260 objfile it is in; If there is more than one N_MAIN, choose
3261 the one in the symfile_objfile; If there is more than one
3262 N_MAIN within a given objfile, complain() and choose
3263 arbitrarily. (kingdon) */
3265 set_main_name (name
);
3268 /* The following symbol types can be ignored. */
3269 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3270 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3271 /* N_UNDF: Solaris 2: File separator mark. */
3272 /* N_UNDF: -- we will never encounter it, since we only process
3273 one file's symbols at once. */
3274 case N_ENDM
: /* Solaris 2: End of module. */
3275 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3279 /* '#' is a GNU C extension to allow one symbol to refer to another
3282 Generally this is used so that an alias can refer to its main
3287 /* Initialize symbol reference names and determine if this is a
3288 definition. If a symbol reference is being defined, go ahead
3289 and add it. Otherwise, just return. */
3294 /* If this stab defines a new reference ID that is not on the
3295 reference list, then put it on the reference list.
3297 We go ahead and advance NAME past the reference, even though
3298 it is not strictly necessary at this time. */
3299 refnum
= symbol_reference_defined (&s
);
3301 if (!ref_search (refnum
))
3302 ref_add (refnum
, 0, name
, valu
);
3306 previous_stab_code
= type
;
3309 /* FIXME: The only difference between this and elfstab_build_psymtabs
3310 is the call to install_minimal_symbols for elf, and the support for
3311 split sections. If the differences are really that small, the code
3312 should be shared. */
3314 /* Scan and build partial symbols for an coff symbol file.
3315 The coff file has already been processed to get its minimal symbols.
3317 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3320 OBJFILE is the object file we are reading symbols from.
3321 ADDR is the address relative to which the symbols are (e.g.
3322 the base address of the text segment).
3323 TEXTADDR is the address of the text section.
3324 TEXTSIZE is the size of the text section.
3325 STABSECTS is the list of .stab sections in OBJFILE.
3326 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3327 .stabstr section exists.
3329 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3330 adjusted for coff details. */
3333 coffstab_build_psymtabs (struct objfile
*objfile
,
3334 CORE_ADDR textaddr
, unsigned int textsize
,
3335 struct stab_section_list
*stabsects
,
3336 file_ptr stabstroffset
, unsigned int stabstrsize
)
3339 bfd
*sym_bfd
= objfile
->obfd
;
3340 char *name
= bfd_get_filename (sym_bfd
);
3341 struct dbx_symfile_info
*info
;
3342 unsigned int stabsize
;
3344 /* There is already a dbx_symfile_info allocated by our caller.
3345 It might even contain some info from the coff symtab to help us. */
3346 info
= objfile
->deprecated_sym_stab_info
;
3348 DBX_TEXT_ADDR (objfile
) = textaddr
;
3349 DBX_TEXT_SIZE (objfile
) = textsize
;
3351 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3352 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3353 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3355 if (stabstrsize
> bfd_get_size (sym_bfd
))
3356 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3357 DBX_STRINGTAB (objfile
) = (char *)
3358 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3359 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3361 /* Now read in the string table in one big gulp. */
3363 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3365 perror_with_name (name
);
3366 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3367 if (val
!= stabstrsize
)
3368 perror_with_name (name
);
3370 stabsread_new_init ();
3371 buildsym_new_init ();
3372 free_header_files ();
3373 init_header_files ();
3375 processing_acc_compilation
= 1;
3377 /* In a coff file, we've already installed the minimal symbols that came
3378 from the coff (non-stab) symbol table, so always act like an
3379 incremental load here. */
3380 if (stabsects
->next
== NULL
)
3382 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3383 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3384 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3388 struct stab_section_list
*stabsect
;
3390 DBX_SYMCOUNT (objfile
) = 0;
3391 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3393 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3394 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3397 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3399 symbuf_sections
= stabsects
->next
;
3400 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3404 dbx_symfile_read (objfile
, 0);
3407 /* Scan and build partial symbols for an ELF symbol file.
3408 This ELF file has already been processed to get its minimal symbols.
3410 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3413 OBJFILE is the object file we are reading symbols from.
3414 ADDR is the address relative to which the symbols are (e.g.
3415 the base address of the text segment).
3416 STABSECT is the BFD section information for the .stab section.
3417 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3418 .stabstr section exists.
3420 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3421 adjusted for elf details. */
3424 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3425 file_ptr stabstroffset
, unsigned int stabstrsize
)
3428 bfd
*sym_bfd
= objfile
->obfd
;
3429 char *name
= bfd_get_filename (sym_bfd
);
3430 struct dbx_symfile_info
*info
;
3431 struct cleanup
*back_to
= NULL
;
3433 /* There is already a dbx_symfile_info allocated by our caller.
3434 It might even contain some info from the ELF symtab to help us. */
3435 info
= objfile
->deprecated_sym_stab_info
;
3437 /* Find the first and last text address. dbx_symfile_read seems to
3439 find_text_range (sym_bfd
, objfile
);
3441 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3442 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3443 DBX_SYMCOUNT (objfile
)
3444 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3445 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3446 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3447 DBX_STAB_SECTION (objfile
) = stabsect
;
3449 if (stabstrsize
> bfd_get_size (sym_bfd
))
3450 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3451 DBX_STRINGTAB (objfile
) = (char *)
3452 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3453 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3455 /* Now read in the string table in one big gulp. */
3457 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3459 perror_with_name (name
);
3460 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3461 if (val
!= stabstrsize
)
3462 perror_with_name (name
);
3464 stabsread_new_init ();
3465 buildsym_new_init ();
3466 free_header_files ();
3467 init_header_files ();
3469 processing_acc_compilation
= 1;
3472 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3473 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3475 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3477 /* In an elf file, we've already installed the minimal symbols that came
3478 from the elf (non-stab) symbol table, so always act like an
3479 incremental load here. dbx_symfile_read should not generate any new
3480 minimal symbols, since we will have already read the ELF dynamic symbol
3481 table and normal symbol entries won't be in the ".stab" section; but in
3482 case it does, it will install them itself. */
3483 dbx_symfile_read (objfile
, 0);
3486 do_cleanups (back_to
);
3489 /* Scan and build partial symbols for a file with special sections for stabs
3490 and stabstrings. The file has already been processed to get its minimal
3491 symbols, and any other symbols that might be necessary to resolve GSYMs.
3493 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3496 OBJFILE is the object file we are reading symbols from.
3497 ADDR is the address relative to which the symbols are (e.g. the base address
3498 of the text segment).
3499 STAB_NAME is the name of the section that contains the stabs.
3500 STABSTR_NAME is the name of the section that contains the stab strings.
3502 This routine is mostly copied from dbx_symfile_init and
3503 dbx_symfile_read. */
3506 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3507 char *stabstr_name
, char *text_name
)
3510 bfd
*sym_bfd
= objfile
->obfd
;
3511 char *name
= bfd_get_filename (sym_bfd
);
3513 asection
*stabstrsect
;
3514 asection
*text_sect
;
3516 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3517 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3523 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3524 "but not string section (%s)"),
3525 stab_name
, stabstr_name
);
3527 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3528 xmalloc (sizeof (struct dbx_symfile_info
));
3529 memset (objfile
->deprecated_sym_stab_info
, 0,
3530 sizeof (struct dbx_symfile_info
));
3532 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3534 error (_("Can't find %s section in symbol file"), text_name
);
3535 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3536 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3538 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3539 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3540 / DBX_SYMBOL_SIZE (objfile
);
3541 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3542 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3546 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3547 error (_("ridiculous string table size: %d bytes"),
3548 DBX_STRINGTAB_SIZE (objfile
));
3549 DBX_STRINGTAB (objfile
) = (char *)
3550 obstack_alloc (&objfile
->objfile_obstack
,
3551 DBX_STRINGTAB_SIZE (objfile
) + 1);
3552 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3554 /* Now read in the string table in one big gulp. */
3556 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3557 stabstrsect
, /* bfd section */
3558 DBX_STRINGTAB (objfile
), /* input buffer */
3559 0, /* offset into section */
3560 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3564 perror_with_name (name
);
3566 stabsread_new_init ();
3567 buildsym_new_init ();
3568 free_header_files ();
3569 init_header_files ();
3571 /* Now, do an incremental load. */
3573 processing_acc_compilation
= 1;
3574 dbx_symfile_read (objfile
, 0);
3577 static const struct sym_fns aout_sym_fns
=
3579 bfd_target_aout_flavour
,
3580 dbx_new_init
, /* init anything gbl to entire symtab */
3581 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3582 dbx_symfile_read
, /* read a symbol file into symtab */
3583 NULL
, /* sym_read_psymbols */
3584 dbx_symfile_finish
, /* finished with file, cleanup */
3585 default_symfile_offsets
, /* parse user's offsets to internal form */
3586 default_symfile_segments
, /* Get segment information from a file. */
3588 default_symfile_relocate
, /* Relocate a debug section. */
3593 _initialize_dbxread (void)
3595 add_symtab_fns (&aout_sym_fns
);